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EP3338951B1 - Scratch remover for glass - Google Patents

Scratch remover for glass Download PDF

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Publication number
EP3338951B1
EP3338951B1 EP17210109.9A EP17210109A EP3338951B1 EP 3338951 B1 EP3338951 B1 EP 3338951B1 EP 17210109 A EP17210109 A EP 17210109A EP 3338951 B1 EP3338951 B1 EP 3338951B1
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EP
European Patent Office
Prior art keywords
polishing
use according
abrasive bodies
less
glass
Prior art date
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Active
Application number
EP17210109.9A
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German (de)
French (fr)
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EP3338951C0 (en
EP3338951A1 (en
Inventor
Ulrich Kopp
Markus Vogtmann
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EVI GmbH
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EVI GmbH
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Application granted granted Critical
Publication of EP3338951C0 publication Critical patent/EP3338951C0/en
Publication of EP3338951B1 publication Critical patent/EP3338951B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/02—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface

Definitions

  • the present invention relates to the use of a set for removing scratches from glass surfaces.
  • the invention relates to the use of a set for removing scratches from glass surfaces of tempered glass, such as car glass, watch glass or display covers of mobile devices (e.g. smartphones and tablets).
  • Scratches of any kind not only limit the appearance but often also the function of the object or device.
  • the CN 105538076 A describes a polishing process for glass with a polishing paste using polishing wheels.
  • the aim of the invention is to remove scratches from glass surfaces.
  • a way is to be created to remove scratches regardless of the quality of the glass (or the glass manufacturer). This is intended to preserve the appearance, the function and, not least, the value of the corresponding objects.
  • the invention aims to make expensive replacement of components such as display glasses or watch glasses due to scratches unnecessary, thus opening up considerable savings potential and promoting resource conservation and sustainability.
  • kit according to the present invention enables an end user to remove scratches from glass surfaces without the use of additional tools.
  • the present invention relates to the use of a set for removing scratches from a glass surface, the set comprising a polishing paste containing abrasive bodies and a polishing rod in the form of a spatula (hereinafter also referred to as "spatula-like polishing tool").
  • the present invention enables scratch removal from known glass qualities from all manufacturers.
  • the invention can be used, for example, on extremely hard and flexible tempered glass, such as those offered under the brands Gorilla Glass (CORNING), DRAGONTRAIL (Asahi Glass) and XENSATION COVER (Schott), as well as on mineral and sapphire glass (watches), car glass/safety glass (cars) and on normal glass from any manufacturer (windows, furniture, glass objects).
  • CORNING Gorilla Glass
  • DRAGONTRAIL Asahi Glass
  • XENSATION COVER Schott
  • the invention is also suitable for glass ceramics, such as ceramic hobs, as well as for bulletproof glass such as that used for shop windows.
  • polishing paste and polishing rod is particularly important for the invention.
  • One aspect of the present invention is the manual polishing of glass surfaces, i.e. polishing using only muscle power without the aid of expensive motor-driven tools.
  • no other tool should preferably be used in addition to the polishing rod (the spatula-like polishing tool), which is optionally partially surrounded by a material and which can optionally be clamped into a holder.
  • the polishing effect of the polishing paste is significantly lower when only a cloth or rag is used as a polishing aid. This is even more true the harder the surface to be polished.
  • cloths e.g. a microfiber cloth
  • small abrasive particles are pressed into the material and can therefore no longer exert their polishing effect sufficiently.
  • the use of the significantly harder polishing rod in the form of a spatula now means that the abrasive particles only partially penetrate the polishing tool and, if enriched, may form a grinding or polishing surface there.
  • the polishing effect of the abrasive particles in the polishing paste is retained. This means that even fine scratches can be removed from extremely hard glass.
  • the polishing rod in the form of a spatula (also polishing aid), which can also be referred to as a spatula-like polishing tool, is not particularly limited as long as the polishing paste is spread on the glass surface.
  • the shape of a spatula (a flattened cuboid) is ideally suited, at least on the polishing side of the tool.
  • the simplest form of such a polishing rod is a cuboid as in Fig. 1 shown, whereby the edges can also be rounded or bevelled.
  • An ergonomically advantageous solution is to position the polishing tool at an angle ( ⁇ ) of approximately 45° to the longitudinal direction of the polishing tool (e.g. in a range of 20° to 70°, preferably 30° to 60°, or 40° to 50°) bevelled polishing surface (cf. Fig. 2A , perspective, and Fig. 2B Front view of the Fig. 2A ).
  • ⁇ angle
  • This optimally combines the normal force for the necessary polishing pressure and the transverse force for the polishing movement, and "chatter marks" are avoided.
  • the bevel can also be present at both ends of the polishing tool in order to use it with two polishing pastes with different grain sizes.
  • the polishing tool preferably has dimensions that allow the tool to be operated with one hand and to exert sufficient pressure during polishing.
  • the length (L) is preferably 2 to 35 cm.
  • the length should preferably be at least 3 cm, at least 4 cm, at least 5 cm, at least 6 cm, at least 7 cm, at least 9 cm, at least 10 cm, or at least 11 cm.
  • the length should preferably be at most 30 cm, at most 28 cm, at most 26 cm, at most 25 cm, at most 24 cm, at most 23 cm, at most 22 cm, or at most 21 cm.
  • the length is particularly preferably in a range from 11 to 22 cm, even more preferably in a range from 13 to 17 cm.
  • the width (B) should be at most 2.5 cm, at most 2.0 cm, at most 1.5 cm, or at most 1.0 cm. Likewise, the width should preferably be at least 0.3 cm, at least 0.4 cm, at least 0.5 cm, at least 0.6 cm, or at least 0.7 cm. The width is particularly preferably in a range from 0.5 to 1.5 cm.
  • the depth (T) or thickness (the shortest side) should preferably be at most 1.50 cm, at most 1.30 cm, at most 1.20 cm, at most 1.10 cm, at most 1.00 cm, or at most 0.90 cm.
  • the thickness should preferably be at least 0.10 cm, at least 0.15 cm, at least 0.20 cm, at least 0.30 cm, at least 0.40 cm, or at least 0.45 cm.
  • the thickness is particularly preferably in a range from 0.20 to 1.00 cm.
  • the polishing tool preferably has an aspect ratio (L/T) of the length (L) to the thickness (T) of at least 6, preferably at least 8, at least 10, at least 15, at least 20 or at least 25.
  • This aspect ratio (L/T) is preferably 100 or less, 90 or less, 80 or less or 70 or less.
  • the aspect ratio (W/T) of the width (W) to the thickness (T) is preferably 1.3 or more, 1.5 or more, 1.7 or more, 1.9 or more, 2.0 or more, 2.1 or more, or 2.2 or more.
  • This aspect ratio (W/T) is preferably 5.0 or less, 4.0 or less, 3.5 or less, 3.2 or less, or 3.0 or less.
  • these dimensions are also preferred, where length refers to the longest dimension of the tool, thickness refers to the material thickness of the tool near (at 0.3 cm) the end used for polishing, and width refers to the dimension (at the end used for polishing) in the direction perpendicular (plumb) to both the direction of length and the direction of thickness.
  • the abrasive bodies are preferably made of a material that has a Mohs hardness of 5.5 or more, 7.0 or more, 8.0 or more, 9.0 or more, particularly preferably 9.2 or more, 9.5 or more, 9.8 or more, 9.9 or more or more than 9.9.
  • the Mohs hardness is preferably 9.5 or more, 9.8 or more, particularly preferably 10.0.
  • the Mohs hardness is particularly preferably in the range from 9.0 to 10.0.
  • the abrasive bodies are preferably made of a material selected from the group consisting of diamond, aluminum oxide (Al203), boron carbide, silicon carbide, cerium oxide and boron nitride. Although the hardness and hence the material can be appropriately selected depending on the application of the invention, it is preferred to use diamond as the material of the abrasive bodies in order to ensure a wide range of applications even without knowing the material to be polished.
  • the diamond is preferably synthetic diamond.
  • the diamond may be monocrystalline diamond or polycrystalline diamond, preferably polycrystalline diamond.
  • Polycrystalline diamond shows better results in polishing effect in the present invention. The reason is believed to be as follows: Monocrystalline industrial diamond, which is relatively inexpensive and can be produced in large quantities, has a monocrystalline lattice structure. The slip planes are parallel to each other. When stressed (e.g. during polishing), the monocrystalline diamond grain breaks along the parallel cleavage planes. This creates grains in a blocky shape with sharp cutting edges. However, the grain size can be halved by just one break.
  • PCD polycrystalline industrial diamond
  • a polycrystalline industrial diamond is made up of a large number of tiny diamond grains (usually in the order of nm). When stressed, small corners and edges break off the diamond grain, so that new, sharp cutting edges are constantly created (self-sharpening effect). Thanks to this unique characteristic, high removal rates (polishing rates) are possible over a longer period of time. PCD is therefore ideal for polishing extremely hard materials such as sapphire glass, ceramics, but also GORILLA GLAS (brand).
  • the polishing tool is preferably made of wood or plastic. Both wood and plastic are available in different degrees of hardness. The polishing effect can be finely tuned by the hardness of the polishing tool.
  • polishing effect of the combination of polishing rod and polishing paste can be adjusted.
  • polishing effect of the abrasive bodies is buffered more strongly in soft material (as they penetrate deeper into the material) and correspondingly less in hard wood.
  • softer polishing tools probably reduce the "rolling motion" of the abrasive bodies (or polishing bodies) that is actually typical for the lapping process, so that a typical lapping process takes place rather than a typical polishing process.
  • Hard/sharp hard polishing rod - polycrystalline diamond.
  • soft woods usually with a Brinell hardness (across the grain; 12% moisture) of at most 20; e.g. linden (16), spruce (12), fir (16), Douglas fir, pine (19), larch (19), balsa (2), alder (12), linden (16), poplar (10), whereby in the invention the hardness should be at least 10), hard or medium-hard woods (usually with a Brinell hardness between 20 and 30 e.g. birch (22 to 30, depending on the species), elm or elm (30)) and hard woods or very hard woods (usually with a Brinell hardness of at least 30 e.g.
  • Hard (medium hard) woods and hard woods are preferably used for the polishing tool in the present invention, preferably birch or beech, preferably birch.
  • a soft wood can be used, preferably spruce, pine or linden, preferably linden, in the last step, particularly in a multi-stage polishing process. If plastics are used, they can be categorized according to their hardness according to the different types of wood and used accordingly.
  • the abrasive bodies preferably have an average particle size D50 (by volume) in a range from 0.05 to 25.0 ⁇ m.
  • the range is particularly preferably 0.10 to 15.0 ⁇ m, 0.10 to 12.0 ⁇ m, 0.10 to 10.0 ⁇ m, 0.10 to 8.0 ⁇ m, 0.10 to 6.0 ⁇ m, or 0.10 to 4.0 ⁇ m.
  • the average particle size is preferably at least 0.2 ⁇ m, at least 0.3 ⁇ m, at least 0.4 ⁇ m or at least 0.5 ⁇ m in order to ensure a good polishing effect (within a reasonable time).
  • the grain size (average particle size D50) of the abrasive also plays a significant role in the polishing effect.
  • diamond powder with a grain size (average particle size) of >6 ⁇ m in Gorilla Glass itself can cause micro-scratches and blind the surface. Even coarser diamond powder >25 ⁇ m can cause visible scratches even in Gorilla Glass.
  • a grain size of significantly less than 6 ⁇ m is preferably used to remove scratches, at least in the last step. Better and, above all, faster results are obtained, however, if the polishing is carried out in several stages (at least two stages).
  • the grain size can be gradually increased from coarse grain (e.g. 6.0 - 25.0 ⁇ m, preferably 6.0 - 10.0 ⁇ m) to medium grain(s) (e.g. 1.0 - 6.0 ⁇ m; 1.0 - 3.0 ⁇ m; 1.5 - 2.5 ⁇ m) to fine grain (e.g. 0.2 - 1.0 ⁇ m), whereby the coarse grain and/or one or more of the medium grains can also be omitted.
  • coarse grain e.g. 6.0 - 25.0 ⁇ m, preferably 6.0 - 10.0 ⁇ m
  • medium grain(s) e.g. 1.0 - 6.0 ⁇ m; 1.0 - 3.0 ⁇ m; 1.5 - 2.5 ⁇ m
  • fine grain e.g.
  • the polishing is carried out in several stages (e.g. two stages), wherein at least one polishing process is carried out with a medium particle size of the polishing bodies (e.g. D50 in the range 1.0 - 6.0 ⁇ m, 1.0 - 3.0 ⁇ m, or 1.5 - 2.5 ⁇ m) and at least one polishing process is carried out with a fine particle size (e.g. D50 in the range 0.2 - 1.0 ⁇ m, 0.4 - 1.0 ⁇ m, 0.5 - 1.0 ⁇ m, or 0.6 - 0.9 ⁇ m).
  • a medium particle size of the polishing bodies e.g. D50 in the range 1.0 - 6.0 ⁇ m, 1.0 - 3.0 ⁇ m, or 1.5 - 2.5 ⁇ m
  • a fine particle size e.g. D50 in the range 0.2 - 1.0 ⁇ m, 0.4 - 1.0 ⁇ m, 0.5 - 1.0 ⁇ m, or 0.6 - 0.9 ⁇ m.
  • the particle size distribution of the polishing particles is preferably narrow.
  • the amount of particles with particularly large particle sizes should be small.
  • the D99 value is therefore preferably at most 2.5 times the D50 value, particularly preferably at most 2.3 times, 2.2 times, or 2.1 times.
  • the set preferably comprises, in addition to the polishing paste (then referred to as first polishing paste), a second polishing paste containing second abrasive bodies, wherein the second abrasive bodies have a smaller average particle size (D50) than the abrasive bodies of the first polishing paste (then referred to as first abrasive bodies).
  • the second abrasive bodies preferably have an average particle size of at most 70%, preferably at most 50%, at most 45%, or at most 40% of the average particle size of the first abrasive bodies. Preferably it is 20% or more, also preferably 25% or more. Unnecessary work steps can be avoided by appropriate grading.
  • the average particle size of the first abrasive body is preferably in a range from 1.0 to 6.0 ⁇ m, particularly preferably 1.3 to 3.0 ⁇ m, and the average particle size of the second abrasive body is preferably in a range from 0.1 to 1.5 ⁇ m, particularly preferably 0.5 to 1.2 ⁇ m.
  • an additional polishing tool in a further work step (preferably the last polishing step) that has a lower hardness than the first polishing tool. In this way, a finely polished surface can be created.
  • the set preferably contains, in addition to the polishing tool (then referred to as the first polishing tool), a second spatula-like polishing tool, wherein the second polishing tool can have a lower hardness (e.g. made of a soft material or wood, such as linden wood) than the first polishing tool (e.g. made of a hard or medium-hard material or wood, such as birch wood).
  • the preferred shapes and dimensions of the second polishing tool are preferably corresponding to the preferred shapes and dimensions of the first polishing tool described above.
  • the first (or only) polishing tool can be used in a two- or multi-stage polishing process in such a way that the previously unused side is used at least for the last polishing step and/or the polishing tool is ground down before at least the last polishing step.
  • the set can contain a grinding tool (e.g. sandpaper). This can prevent coarse abrasives from being "carried over" into a polishing step with fine abrasives.
  • the set further comprises a piece of fabric, preferably a fabric with very fine fibers (microfiber cloth).
  • the piece of fabric (or cloth) can be attached to the end of the polishing tool that is in contact with the glass surface during polishing.
  • the fabric can be, for example, a woven fabric or a nonwoven fabric. It has been shown that the polishing effect can be increased by a suitable material is not impaired. In fact, the piece of material can largely prevent the polishing paste from being "pushed away". The piece of material soaks up the polishing paste and constantly supplies the end of the polishing tool with polishing paste. This not only saves time (since the paste does not have to be pushed back into the work area), but also allows for more even polishing.
  • the polishing cloth should be as thin as possible (e.g. 0.1 - 1.0 mm, preferably 0.3 - 0.5 mm) and have as little spring effect as possible so that the force is optimally transferred to the surface. Furthermore, polishing with the piece of material can be carried out with significantly less polishing paste and is therefore much more economical. It has also been found that when using such a polishing cloth, the hardness of the polishing tool and its material (wood or plastic) only play a minor role. Therefore, when using a polishing cloth, several (even all) polishing steps can be carried out using only one polishing aid (or several polishing aids made of the same material) without affecting the result. By using a polishing cloth for each of the pastes, contamination of the finer pastes with the larger abrasive bodies of the coarser pastes can also be avoided, thus preventing new scratches during fine polishing.
  • the cloth When using a polishing cloth in a multi-stage polishing process, the cloth should be changed after each polishing step, or at least before the last polishing step (or, if the cloth is long, the polishing point should be changed). In this case, grinding down the polishing tool (or replacing or changing the polishing side) is not necessary, as the coarse abrasive grains from previous polishing steps do not have a negative effect on the cloth.
  • the cloth is placed over the polishing tip (or polishing end) of the tool so that the entire polishing surface is covered with the cloth.
  • the cloth is then preferably attached to a part of the polishing tool further back (or in the middle). This can be done, for example, with a simple clip (e.g. made of metal or plastic, such as a paper clip or a clip). or preferably with a rubber (rubber ring).
  • the set therefore preferably contains a clamp or a rubber (ring) to attach the cloth to the polishing tool.
  • cloths in the set are preferably marked (e.g. by color) to prevent confusion, even if the polishing process is interrupted or multiple polishing steps are carried out.
  • the composition of the grinding pastes is not particularly limited. Preferred particle sizes of the abrasive bodies (or polishing bodies) have already been discussed above.
  • the pastes preferably have a proportion of abrasive bodies in a range from 5 to 50% by weight, preferably at least 10% by weight, at least 15% by weight, at least 20% by weight, or at least 25% by weight, likewise preferably at most 45% by weight or at most 40% by weight.
  • the pastes preferably have a composition (especially a viscosity) that prevents the abrasive particles from settling quickly.
  • a composition especially a viscosity
  • oil- or wax-based compositions can be used which, in addition to the abrasive particles, contain oil (e.g. mineral oil), possibly wax (e.g. paraffin wax) and possibly stabilizers (e.g. amorphous pyrogenic silicon oxide).
  • Emulsions can also be used, e.g. oil-in-water (O/W) emulsions (e.g.
  • mineral oil and/or vegetable oil such as olive oil, and emulsifiers, and possibly stabilizers, wax and other auxiliaries
  • W/O emulsions e.g. with silicone oil and emulsifiers, possibly stabilizers, preservatives and other auxiliaries.
  • pastes that contain an abrasive (preferably as specified above and preferably in the amounts mentioned above) and are primarily based on PEG (polyethylene glycol).
  • the properties of the pastes are adjusted by mixing different PEGs (polyethylene glycols), specifically PEGs with different (average) molecular weights are mixed.
  • a mixture can, for example, contain 10-50 wt.% PEG-100, 5-30 wt.% (PEG-400) and 1-20 wt.% PEG-6000 (remainder abrasives).
  • Another example contains PEG-200 (e.g. 50-80 wt.%) and PEG-6000 (e.g. 5-20 wt.%) (remainder abrasive).
  • a PEG-based paste preferably contains the abrasive (preferably as specified above and preferably in the amounts mentioned above), 30-80 wt.% (preferably 40-70 wt.%) PEG ⁇ 1000, 1-20 wt.% (preferably 5-15 wt.%) PEG ⁇ 1000 (preferably PEG ⁇ 2000, PEG ⁇ 3000 or PEG ⁇ 4000) and 0-5 wt.% (preferably ⁇ 3 wt.%) other substances (such as stabilizers, emulsifiers, preservatives, auxiliaries).
  • the invention relates to the use of a set as described above for polishing a glass surface, especially for removing scratches from a glass surface.
  • the use is preferably carried out as outlined above, particularly preferably in several stages (e.g. two stages), e.g. using two polishing pastes and two different polishing tools.
  • the use therefore preferably comprises applying the polishing paste to the glass surface, followed by polishing the glass surface with the aid of the polishing tool, to which a piece of fabric, preferably a microfiber cloth, is optionally attached.
  • the polishing paste it is preferable to use the polishing paste to remove existing (deep) scratches in the first step. Only micro-scratches will then be visible on the surface. In a second step, these micro-scratches are removed with a fine paste and the glass surface is polished to a high gloss.
  • the polishing rod and optionally a piece of cloth (preferably a microfiber cloth) that is attached to the tip of the polishing rod are used as polishing aids.
  • the microfiber cloth absorbs the paste very well, which makes the polishing process much easier and more effective.
  • the scratch could be removed without creating any visible new (micro)scratches.
  • Example 1 was repeated, but the polishing aid was changed.
  • the same type of microfiber cloth as in Example 1 was used as the polishing aid, without any additional polishing aid. The microfiber cloth was therefore moved over the glass surface with the finger.
  • Comparative Example 2 a cotton woven fabric (Comparative Example 2) or a leather polishing cloth (Comparative Example 3) was used and otherwise repeated the procedure of Comparative Example 1. As with Comparative Example 1, the result was unsatisfactory.
  • micro-scratches could not be removed using the microfiber cloth as the only polishing aid. Cloudy or blind spots remained in the glass.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Description

Technisches Gebiettechnical field

Die vorliegende Erfindung betrifft die Verwendung eines Sets zur Entfernung von Kratzern aus Glasoberflächen. Speziell betrifft die Erfindung die Verwendung eines Sets zur Entfernung von Kratzern aus Glasoberflächen von gehärtetem Glas, wie z.B. Autoglas, Uhrglas oder Displayabdeckungen mobiler Geräte (z.B. Smartphones und Tablets).The present invention relates to the use of a set for removing scratches from glass surfaces. In particular, the invention relates to the use of a set for removing scratches from glass surfaces of tempered glass, such as car glass, watch glass or display covers of mobile devices (e.g. smartphones and tablets).

Verwandter Stand der TechnikRelated State of the Art

Jeder Besitzer von Mobiltelefonen (Glas-Displays), Autos (Autoglas), Uhren (Uhrglas), Glas-Möbeln, Deko-Gegenständen, Fensterglas etc. kennt das Problem: So gut wie jede Oberfläche aus Glas verkratz früher oder später. Bereits sogenannte Mikrokratzer, die mit bloßem Auge nicht als Kratzer erkannt werden können, führen z.B. zum Erblinden des Glases also zu einer scheinbaren Eintrübung. Solche Mikrokratzer können selbst bei extrem harten Gläsern, wie diese z.B. bei Displays von Mobiltelefonen und Tablets verwendet werden, durch die ständige Beanspruchung entstehen.Every owner of a mobile phone (glass display), car (car glass), watch (watch glass), glass furniture, decorative objects, window glass, etc. knows the problem: Almost every glass surface gets scratched sooner or later. Even so-called micro-scratches, which cannot be recognized as scratches with the naked eye, can lead to the glass becoming blind, i.e. to an apparent clouding. Such micro-scratches can occur even in extremely hard glass, such as that used for mobile phone and tablet displays, due to constant wear and tear.

Kratzer jeder Art schränken nicht nur die Optik, sondern oft auch die Funktion des Gegenstandes oder Gerätes ein.Scratches of any kind not only limit the appearance but often also the function of the object or device.

Das Problem ist zudem unabhängig davon, um welches Glas bzw. welche Glasqualität es sich handelt und von welchem Hersteller das Glas stammt. Störende Kratzer in Mobiltelefon-Displays schränken beispielsweise die Sicht auf das Display ein, und machen sich oft auch bei der Touch-Bedienung unangenehm bemerkbar.The problem also exists regardless of the type of glass or the quality of glass or the manufacturer of the glass. Annoying scratches in mobile phone displays, for example, limit the view of the display and often make it unpleasant to use the touchscreen.

Im Ergebnis mindern hässliche Kratzer die Nutzbarkeit und den Marktwert (Wiederverkaufswert) der verkratzen Gegenstände stark. Reparaturen bzw. Restaurierungen waren gerade bei Mobiltelefonen oder Uhren mit sehr hartem Glas bisher kaum möglich. Bei austauschbaren Bauteilen gab es lediglich die Möglichkeit, das verkratzte Display (z.B. bei elektronischen Geräten wie Mobiltelefonen) oder das komplette Glas (z.B. bei Autos oder Uhren etc.) vom Fachmann austauschen zu lassen. Dies ist jedoch nicht nur sehr teuer und zeitaufwendig, sondern zusätzlich weder umweltfreundlich noch nachhaltig oder resourcenschonend.As a result, ugly scratches greatly reduce the usability and market value (resale value) of the scratched items. Repairs or restorations were previously hardly possible, especially for mobile phones or watches with very hard glass. With replaceable components, the only option was to have the scratched display (e.g. in electronic devices such as mobile phones) or the entire glass (e.g. in cars or watches, etc.) replaced by a specialist. However, this is not only very expensive and time-consuming, but also neither environmentally friendly nor sustainable or resource-saving.

Die CN 105538076 A beschreibt ein Polierverfahren für Glas mit einer Polierpaste unter Verwendung von Polierscheiben.The CN 105538076 A describes a polishing process for glass with a polishing paste using polishing wheels.

Zusammenfassung der ErfindungSummary of the Invention

Ziel der Erfindung ist es, Kratzer aus Glasoberflächen zu entfernen. Speziell soll eine Möglichkeit geschaffen werden, Kratzer unabhängig von der Glasqualität (bzw. dem Glas-Hersteller) zu entfernen. Damit soll die Optik, die Funktion und nicht zuletzt der Wert der entsprechenden Gegenstände erhalten werden. Zudem setzt sich die Erfindung das Ziel einen teuren Austausch von Bauteilen wie z.B. Displays-Gläser oder Uhrgläser aufgrund von Kratzern überflüssig zu machen, und somit ein erhebliches Einsparpotential zu eröffnen und die Ressourceneinsparung und der Nachhaltigkeit zu fördern.The aim of the invention is to remove scratches from glass surfaces. In particular, a way is to be created to remove scratches regardless of the quality of the glass (or the glass manufacturer). This is intended to preserve the appearance, the function and, not least, the value of the corresponding objects. In addition, the invention aims to make expensive replacement of components such as display glasses or watch glasses due to scratches unnecessary, thus opening up considerable savings potential and promoting resource conservation and sustainability.

Diese Ziele werden durch eine Verwendung gelöst, die in den Ansprüchen definiert sind.These objects are achieved by a use defined in the claims.

Detaillierte Beschreibung der ErfindungDetailed description of the invention

Speziell ermöglich es die Verwendung des Sets gemäß der vorliegenden Erfindung einem Endanwender, Kratzer aus Glasoberflächen ohne Zuhilfenahme weiterer Werkzeuge zu entfernen.Specifically, use of the kit according to the present invention enables an end user to remove scratches from glass surfaces without the use of additional tools.

Die vorliegende Erfindung betrifft die Verwendung eines Sets zum Entfernen von Kratzern aus einer Glasoberfläche, wobei das Set eine Polierpaste, die Schleifmittelkörper enthält, und einen Polierstab in Form eines Spatels (im Folgenden auch als "spatelartiges Polierwerkzeug" bezeichnet) umfasst.The present invention relates to the use of a set for removing scratches from a glass surface, the set comprising a polishing paste containing abrasive bodies and a polishing rod in the form of a spatula (hereinafter also referred to as "spatula-like polishing tool").

Die vorliegende Erfindung ermöglicht eine Kratzerentfernung von bekannten Glas-Qualitäten sämtlicher Hersteller. Die Erfindung kann beispielsweise sowohl bei extrem harten und flexiblen vorgespannten Gläsern, wie diese etwa unter den Marken Gorilla-Glas (CORNING), DRAGONTRAIL (Asahi Glas) und XENSATION COVER (Schott) angeboten werden, wie auch bei Mineral- und Saphirglas (Uhren), Autoglas/Sicherheitsglas (Auto) als auch bei normalem Glas von beliebigen Herstellern (Fenster, Möbel, Glasgegenstände) Anwendung finden. Die Erfindung eignet sich auch für Glaskeramik, wie beispielsweise Ceranfelder sowie für Panzerglas wie es zum Beispiel für Schaufenster eingesetzt wird.The present invention enables scratch removal from known glass qualities from all manufacturers. The invention can be used, for example, on extremely hard and flexible tempered glass, such as those offered under the brands Gorilla Glass (CORNING), DRAGONTRAIL (Asahi Glass) and XENSATION COVER (Schott), as well as on mineral and sapphire glass (watches), car glass/safety glass (cars) and on normal glass from any manufacturer (windows, furniture, glass objects). The invention is also suitable for glass ceramics, such as ceramic hobs, as well as for bulletproof glass such as that used for shop windows.

Für die Erfindung ist speziell die Kombination aus Polierpaste und Polierstab wichtig. Ein Aspekt der vorliegenden Erfindung liegt auf dem manuellen Polieren von Glasoberflächen, d.h. ein Polieren nur mit Muskelkraft ohne Zuhilfenahme teurer motorgetriebener Hilfsmittel. Ebenso sollen bevorzugt neben dem Polierstab (dem spatelartigen Polierwerkzeug), der optional teilweise mit einem Stoff umgeben ist und der optional in eine Halterung eingespannt sein kann, kein weiteres Werkzeug verwendet werden (das mit der Glasoberfläche in Kontakt steht).The combination of polishing paste and polishing rod is particularly important for the invention. One aspect of the present invention is the manual polishing of glass surfaces, i.e. polishing using only muscle power without the aid of expensive motor-driven tools. Likewise, no other tool (which is in contact with the glass surface) should preferably be used in addition to the polishing rod (the spatula-like polishing tool), which is optionally partially surrounded by a material and which can optionally be clamped into a holder.

Wie sich in Versuchen herausgestellt hat ist die Polierwirkung der Polierpaste deutlich geringer, wenn lediglich ein Tuch bzw. ein Lappen als Polierhilfe verwendet wird. Dies trifft umso mehr zu, je härter die zu polierende Oberfläche ist. Obwohl die Erfindung nicht auf die folgende Theorie zu beschränken ist, wird angenommen, dass Tücher (z.B. ein Mikrofasertuch) nicht ausreichend Druck auf die Schleifmittelkörper ausüben können. Speziell werden wohl insbesondere kleine Schleifmittelkörper in den Stoff gedrückt und können so ihre Polierwirkung nicht mehr ausreichend ausüben. Die Verwendung des deutlich härteren Polierstabs in Form eines Spatels führt nun dazu, dass die Schleifmittelkörper allenfalls teilweise in das Polierwerkzeug eindringen und dort bei Anreicherung ggf. eine Schleif- oder Polierfläche bilden. Jedenfalls bleibt bei Verwendung des Polierwerkzeugs der Erfindung die Polierwirkung der Schleifmittelkörper in der Polierpaste erhalten. Somit können selbst feine Kratzer aus extrem hartem Glas entfernt werden.As tests have shown, the polishing effect of the polishing paste is significantly lower when only a cloth or rag is used as a polishing aid. This is even more true the harder the surface to be polished. Although the invention is not limited to the following theory, it is assumed that cloths (e.g. a microfiber cloth) cannot exert sufficient pressure on the abrasive particles. In particular, small abrasive particles are pressed into the material and can therefore no longer exert their polishing effect sufficiently. The use of the significantly harder polishing rod in the form of a spatula now means that the abrasive particles only partially penetrate the polishing tool and, if enriched, may form a grinding or polishing surface there. In any case, when the polishing tool of the invention is used, the polishing effect of the abrasive particles in the polishing paste is retained. This means that even fine scratches can be removed from extremely hard glass.

Der Polierstab in Form eines Spatels (auch Polierhilfe), der auch als spatelartiges Polierwerkzeug bezeichnet werden kann, ist nicht insbesondere begrenzt, solange die Polierpaste damit auf der Glasoberfläche verteilt werden. Dabei ist die Form eines Spatels (ein abgeflachter Quader) zumindest an der Polierseite des Werkzeugs bestens geeignet. Die einfachste Form solch eines Polierstabs ist ein Quader wie in Fig. 1 gezeigt, wobei die Kanten auch abgerundet oder abgeschrägt sein können.The polishing rod in the form of a spatula (also polishing aid), which can also be referred to as a spatula-like polishing tool, is not particularly limited as long as the polishing paste is spread on the glass surface. The shape of a spatula (a flattened cuboid) is ideally suited, at least on the polishing side of the tool. The simplest form of such a polishing rod is a cuboid as in Fig. 1 shown, whereby the edges can also be rounded or bevelled.

Als ergonomisch vorteilhaft hat sich eine zur Längsrichtung des Polierwerkzeuges in einem Winkel (β) von etwa 45° (z.B. in einem Bereich von 20° bis 70°, bevorzugt 30° bis 60°, oder 40° bis 50°) abgeschrägte Polierfläche erwiesen (vgl. Fig. 2A, perspektivisch, und Fig. 2B Draufsicht von vorne der Fig. 2A). Hierdurch werden sowohl die Normalkraft für den nötigen Polierdruck als auch die Querkraft für die Polierbewegung optimal miteinander kombiniert und "Rattermarken" werden vermieden. Die Abschrägung kann auch an beiden Enden des Polierwerkzeuges vorhanden sein, um es mit zwei Polierpasten mit unterschiedlichen Körnungen zu verwenden.An ergonomically advantageous solution is to position the polishing tool at an angle (β) of approximately 45° to the longitudinal direction of the polishing tool (e.g. in a range of 20° to 70°, preferably 30° to 60°, or 40° to 50°) bevelled polishing surface (cf. Fig. 2A , perspective, and Fig. 2B Front view of the Fig. 2A ). This optimally combines the normal force for the necessary polishing pressure and the transverse force for the polishing movement, and "chatter marks" are avoided. The bevel can also be present at both ends of the polishing tool in order to use it with two polishing pastes with different grain sizes.

Das Polierwerkzeug hat bevorzugt Abmessungen, die es erlauben, das Werkzeug mit einer Hand zu bedienen und einen ausreichenden Druck beim Polieren auszuüben.The polishing tool preferably has dimensions that allow the tool to be operated with one hand and to exert sufficient pressure during polishing.

So beträgt bei einem quaderförmigen (oder annähernd quaderförmigen) Polierwerkzeug dessen Länge (L) bevorzugt 2 bis 35 cm. Zur leichteren Handhabbarkeit sollte die Länge bevorzugt zumindest 3 cm, zumindest 4 cm, zumindest 5 cm, zumindest 6 cm, zumindest 7 cm, zumindest 9 cm, zumindest 10 cm, oder zumindest 11 cm betragen. Ebenso sollte die Länge bevorzugt höchstens 30 cm, höchstens 28 cm, höchstens 26 cm, höchstens 25 cm, höchstens 24 cm, höchstens 23 cm, höchstens 22 cm oder höchstens 21 cm betragen. Besonders bevorzugt liegt die Länge in einem Bereich von 11 bis 22 cm, noch stärker bevorzugt in einem Bereich von 13 bis 17 cm.For example, in the case of a cuboid-shaped (or approximately cuboid-shaped) polishing tool, its length (L) is preferably 2 to 35 cm. For easier handling, the length should preferably be at least 3 cm, at least 4 cm, at least 5 cm, at least 6 cm, at least 7 cm, at least 9 cm, at least 10 cm, or at least 11 cm. Likewise, the length should preferably be at most 30 cm, at most 28 cm, at most 26 cm, at most 25 cm, at most 24 cm, at most 23 cm, at most 22 cm, or at most 21 cm. The length is particularly preferably in a range from 11 to 22 cm, even more preferably in a range from 13 to 17 cm.

Die Breite (B) sollte höchstens 2,5 cm, höchstens 2,0 cm, höchstens 1,5 cm, oder höchstens 1,0 cm betragen. Ebenso sollte die Breite bevorzugt zumindest 0,3 cm, zumindest 0,4 cm, zumindest 0,5 cm, zumindest 0,6 cm oder zumindest 0,7 cm betragen. Besonders bevorzugt liegt die Breite in einem Bereich von 0,5 bis 1,5 cm.The width (B) should be at most 2.5 cm, at most 2.0 cm, at most 1.5 cm, or at most 1.0 cm. Likewise, the width should preferably be at least 0.3 cm, at least 0.4 cm, at least 0.5 cm, at least 0.6 cm, or at least 0.7 cm. The width is particularly preferably in a range from 0.5 to 1.5 cm.

Die Tiefe (T) bzw. Stärke bzw. Dicke (die kürzeste Seite) sollte bevorzugt höchstens 1,50 cm, höchstens 1,30 cm, höchstens 1,20 cm, höchstens 1,10 cm, höchstens 1,00 cm, oder höchstens 0,90 cm betragen. Ebenso sollte die Dicke bevorzugt zumindest 0,10 cm, zumindest 0,15 cm, zumindest 0,20 cm, zumindest 0,30 cm, zumindest 0,40 cm oder zumindest 0,45 cm betragen. Besonders bevorzugt liegt die Dicke in einem Bereich von 0,20 bis 1,00 cm.The depth (T) or thickness (the shortest side) should preferably be at most 1.50 cm, at most 1.30 cm, at most 1.20 cm, at most 1.10 cm, at most 1.00 cm, or at most 0.90 cm. Likewise, the thickness should preferably be at least 0.10 cm, at least 0.15 cm, at least 0.20 cm, at least 0.30 cm, at least 0.40 cm, or at least 0.45 cm. The thickness is particularly preferably in a range from 0.20 to 1.00 cm.

Das Polierwerkzeug hat bevorzugt ein Seitenverhältnis (L/T) der Länge (L) zur Dicke (T) von zumindest 6, bevorzugt zumindest 8, zumindest 10, zumindest 15, zumindest 20 oder zumindest 25. Dieses Seitenverhältnis (L/T) ist bevorzugt 100 oder weniger, 90 oder weniger, 80 oder weniger oder 70 oder weniger.The polishing tool preferably has an aspect ratio (L/T) of the length (L) to the thickness (T) of at least 6, preferably at least 8, at least 10, at least 15, at least 20 or at least 25. This aspect ratio (L/T) is preferably 100 or less, 90 or less, 80 or less or 70 or less.

Das Seitenverhältnis (B/T) der Breite (B) zur Dicke (T) beträgt bevorzugt 1,3 oder mehr, 1,5 oder mehr, 1,7 oder mehr, 1,9 oder mehr, 2,0 oder mehr, 2,1 oder mehr oder 2,2 oder mehr. Dieses Seitenverhältnis (B/T) ist bevorzugt 5,0 oder weniger, 4,0 oder weniger, 3,5 oder weniger, 3,2 oder weniger oder 3,0 oder weniger.The aspect ratio (W/T) of the width (W) to the thickness (T) is preferably 1.3 or more, 1.5 or more, 1.7 or more, 1.9 or more, 2.0 or more, 2.1 or more, or 2.2 or more. This aspect ratio (W/T) is preferably 5.0 or less, 4.0 or less, 3.5 or less, 3.2 or less, or 3.0 or less.

Für nicht quaderförmige (oder annähernd quaderförmige) Polierwerkzeuge sind diese Abmessungen ebenfalls bevorzugt, wobei sich die Länge dabei auf die längste Abmessung des Werkzeugs bezieht, die Dicke sich auf die Materialstärke des Werkzeugs in der Nähe (in 0,3 cm Entfernung) des zum Polieren verwendeten Endes bezieht und die Breite sich auf die Abmessung (an dem zum Polieren verwendeten Ende) in der Richtung bezieht, die sowohl zu der Richtung der Länge als auch zu der Richtung der Dicke senkrecht (lotrecht) ist.For non-cuboid (or nearly cuboid) polishing tools, these dimensions are also preferred, where length refers to the longest dimension of the tool, thickness refers to the material thickness of the tool near (at 0.3 cm) the end used for polishing, and width refers to the dimension (at the end used for polishing) in the direction perpendicular (plumb) to both the direction of length and the direction of thickness.

Die Schleifmittelkörper sind bevorzugt aus einem Material hergestellt, das eine Mohs-Härte von 5,5 oder mehr, 7,0 oder mehr, 8,0 oder mehr, 9,0 oder mehr, besonders bevorzugt 9,2 oder mehr, 9,5 oder mehr, 9,8 oder mehr, 9,9 oder mehr oder mehr als 9,9 aufweist. Insbesondere zum Polieren vorgespannter Gläser beträgt die Mohs-Härte bevorzugt 9,5 oder mehr, 9,8 oder mehr, insbesondere bevorzugt 10,0. Die Mohs-Härte liegt besonders bevorzugt in dem Bereich von 9,0 bis 10,0.The abrasive bodies are preferably made of a material that has a Mohs hardness of 5.5 or more, 7.0 or more, 8.0 or more, 9.0 or more, particularly preferably 9.2 or more, 9.5 or more, 9.8 or more, 9.9 or more or more than 9.9. In particular for polishing tempered glasses, the Mohs hardness is preferably 9.5 or more, 9.8 or more, particularly preferably 10.0. The Mohs hardness is particularly preferably in the range from 9.0 to 10.0.

Die Schleifmittelkörper sind bevorzugt aus einem Material hergestellt, das aus der Gruppe ausgewählt ist, die aus Diamant, Aluminiumoxid (Al203), Borcarbid, Siliciumcarbid, Ceroxid und Bornitrid besteht. Obwohl die Härte und somit das Material je nach Anwendung der Erfindung angemessen ausgewählt werden können, ist es bevorzugt, Diamant als Material der Schleifmittelkörper zu verwenden, um eine Breite Anwendungsmöglichkeit selbst in Unkenntnis des zu Polierenden Materials zu gewährleisten.The abrasive bodies are preferably made of a material selected from the group consisting of diamond, aluminum oxide (Al203), boron carbide, silicon carbide, cerium oxide and boron nitride. Although the hardness and hence the material can be appropriately selected depending on the application of the invention, it is preferred to use diamond as the material of the abrasive bodies in order to ensure a wide range of applications even without knowing the material to be polished.

Der Diamant ist bevorzugt synthetischer Diamant. Zudem kann der Diamant monokristalliner Diamant oder polykristalliner Diamant sein, bevorzugt polykristalliner Diamant. Polykristalliner Diamant zeigt bei der vorliegenden Erfindung bessere Ergebnisse bei der Polierwirkung. Als Grund wird das Folgende angenommen:
Monokristalliner Industriediamant, der relativ kostengünstig und in großen Mengen herstellbar ist, weist eine monokristalline Gitterstruktur auf. Die Gleitebenen sind parallel zueinander. Bei Belastung (z.B. beim Polieren) bricht das monokristalline Diamantkorn entlang der parallelen Spaltebenen. Hierdurch entstehen Körner in blockiger Form mit scharfen Schneidkanten. Allerdings kann sich somit bereits durch lediglich einen Bruch die Korngröße halbieren.The diamond is preferably synthetic diamond. In addition, the diamond may be monocrystalline diamond or polycrystalline diamond, preferably polycrystalline diamond. Polycrystalline diamond shows better results in polishing effect in the present invention. The reason is believed to be as follows:
Monocrystalline industrial diamond, which is relatively inexpensive and can be produced in large quantities, has a monocrystalline lattice structure. The slip planes are parallel to each other. When stressed (e.g. during polishing), the monocrystalline diamond grain breaks along the parallel cleavage planes. This creates grains in a blocky shape with sharp cutting edges. However, the grain size can be halved by just one break.

Ein polykristalliner Industriediamant (PCD) hingegen ist aus einer Vielzahl winziger Diamantkörner (üblicherweise in der Größenordnung von nm) zusammengesetzt. Bei Belastung brechen kleine Ecken und Kanten aus dem Diamantkorn heraus, sodass immer wieder neue, scharfe Schneidkanten entstehen (Selbstschärfungseffekt). Dank dieser einzigartigen Charakteristik werden über längere Zeit hohe Abtragraten (Polierraten) ermöglicht. PCD eignet sich daher bestens für das Polieren extrem harter Materialien wie Saphirglas, Keramik, aber auch für GORILLA GLAS (Marke).A polycrystalline industrial diamond (PCD), on the other hand, is made up of a large number of tiny diamond grains (usually in the order of nm). When stressed, small corners and edges break off the diamond grain, so that new, sharp cutting edges are constantly created (self-sharpening effect). Thanks to this unique characteristic, high removal rates (polishing rates) are possible over a longer period of time. PCD is therefore ideal for polishing extremely hard materials such as sapphire glass, ceramics, but also GORILLA GLAS (brand).

Das Polierwerkzeug ist bevorzugt aus Holz oder Kunststoff hergestellt. Sowohl Hölzer als auch Kunststoffe sind in verschiedenen Härtegraden erhältlich. Durch die Härte des Polierwerkzeugs kann die Polierwirkung fein abgestimmt werden.The polishing tool is preferably made of wood or plastic. Both wood and plastic are available in different degrees of hardness. The polishing effect can be finely tuned by the hardness of the polishing tool.

Je nach Härtegrad der Kontaktfläche des Polierwerkzeugs kann die Polierwirkung der Kombination Polierstab und Polierpaste eingestellt werden. Auch hier liegt die Vermutung nahe, dass die Polierwirkung der Schleifmittelkörper im weichen Material stärker abgepuffert wird (da diese tiefer in das Material eindringen) und im harten Holz entsprechend weniger. Außerdem wird vermutlich durch weichere Polierwerkzeuge die eigentlich für das Läppverfahren typische "Rollbewegung" der Schleifmittelkörper (bzw. Polierkörper) reduziert und so dass ein typischer Läppvorgang als eher ein typischer Poliervorgang erfolgt. Hierbei kann folgende Polierabstufung dargestellt Weich/mild: weicher Polierstab - monokristalliner Diamant. Hart/scharf: Harter Polierstab -polykristalliner Diamant.Depending on the degree of hardness of the contact surface of the polishing tool, the polishing effect of the combination of polishing rod and polishing paste can be adjusted. Here too, it is reasonable to assume that the polishing effect of the abrasive bodies is buffered more strongly in soft material (as they penetrate deeper into the material) and correspondingly less in hard wood. In addition, softer polishing tools probably reduce the "rolling motion" of the abrasive bodies (or polishing bodies) that is actually typical for the lapping process, so that a typical lapping process takes place rather than a typical polishing process. The following can be used here: Polishing gradation shown Soft/mild: soft polishing rod - monocrystalline diamond. Hard/sharp: hard polishing rod - polycrystalline diamond.

Im Falle von Hölzern unterscheidet man üblicherweise weiche Hölzer (üblicherweise mit einer Brinell-Härte (quer zur Faser; 12% Feuchte) von höchstens 20; z.B. Linde (16), Fichte (12), Tanne (16), Douglasie, Kiefer (19), Lärche (19), Balsa (2), Erle (12), Linde (16), Pappel (10), wobei bei der Erfindung die Härte mindestens 10 betragen sollte), harte bzw. mittelharte Hölzer (üblicherweise mit einer Brinell-Härte zwischen 20 und 30 z.B. Birke (22 bis 30, je nach Art), Ulme bzw. Rüster (30)) und Harthölzer bzw. sehr harte Hölzer (üblicherweise mit einer Brinell-Härte von mindestens 30 z.B. Eibe (30), Bankirai (63), Esche (38), Kirsche (31), Robinie (46), Teak (≥30), Bambus (40), Olive (51), Wenge (44), Azobé (78), Buche (34), Ebenholz (84), Eiche (34), Weißbuche (34)).In the case of wood, a distinction is usually made between soft woods (usually with a Brinell hardness (across the grain; 12% moisture) of at most 20; e.g. linden (16), spruce (12), fir (16), Douglas fir, pine (19), larch (19), balsa (2), alder (12), linden (16), poplar (10), whereby in the invention the hardness should be at least 10), hard or medium-hard woods (usually with a Brinell hardness between 20 and 30 e.g. birch (22 to 30, depending on the species), elm or elm (30)) and hard woods or very hard woods (usually with a Brinell hardness of at least 30 e.g. yew (30), bankirai (63), ash (38), cherry (31), robinia (46), teak (≥30), bamboo (40), olive (51), wenge (44), azobé (78), beech (34), ebony (84), oak (34), hornbeam (34)).

Für das Polierwerkzeug in der vorliegenden Erfindung werden bevorzugt harte (mittelharte) Hölzer und Harthölzer (sehr harte Hölzer) verwendet, bevorzugt Birke oder Buche, bevorzugt Birke. Für eine Feinpolitur (zur Entfernung letzter Kratzer) kann insbesondere in einem mehrstufigen Poliervorgang bevorzugt im letzten Schritt ein weiches Holz verwendet werden, bevorzugt Fichte, Kiefer oder Linde, bevorzugt Linde. Wenn Kunststoffe verwendet werden, so können diese ihrer Härte nach entsprechend den verschiedenen Holzarten kategorisiert und entsprechend verwendet werden.Hard (medium hard) woods and hard woods (very hard woods) are preferably used for the polishing tool in the present invention, preferably birch or beech, preferably birch. For a fine polish (to remove the last scratches), a soft wood can be used, preferably spruce, pine or linden, preferably linden, in the last step, particularly in a multi-stage polishing process. If plastics are used, they can be categorized according to their hardness according to the different types of wood and used accordingly.

Die Schleifmittelkörper weisen bevorzugt eine mittlere Teilchengröße D50 (nach Volumen) in einem Bereich von 0,05 bis 25,0 µm auf. Der Bereich ist besonders bevorzugt 0,10 bis 15,0 µm, 0,10 bis 12,0 µm, 0,10 bis 10,0 µm, 0,10 bis 8,0 µm, 0,10 bis 6,0 µm, oder 0,10 bis 4,0 µm. Bevorzugt beträgt die mittlere Teilchengröße zumindest 0,2 µm, zumindest 0,3 µm, zumindest 0,4 µm oder zumindest 0,5 µm, um eine gute Polierwirkung (in vertretbarer Zeit) zu gewährleisten.The abrasive bodies preferably have an average particle size D50 (by volume) in a range from 0.05 to 25.0 µm. The range is particularly preferably 0.10 to 15.0 µm, 0.10 to 12.0 µm, 0.10 to 10.0 µm, 0.10 to 8.0 µm, 0.10 to 6.0 µm, or 0.10 to 4.0 µm. The average particle size is preferably at least 0.2 µm, at least 0.3 µm, at least 0.4 µm or at least 0.5 µm in order to ensure a good polishing effect (within a reasonable time).

Natürlich hat auch die Korngröße (mittlere Teilchengröße D50) des Schleifmittels einen nicht unerheblichen Anteil an der Polierwirkung. So führen beispielsweise Diamantpulver mit einer Körnung (mittlere Teilchengröße) von >6 µm in Gorilla Glas selbst zu Mikrokratzern und lassen die Oberfläche erblinden. Durch noch gröbere Diamantpulver >25 µm können selbst in Gorillaglas entstehen sichtbare Kratzer.Of course, the grain size (average particle size D50) of the abrasive also plays a significant role in the polishing effect. For example, diamond powder with a grain size (average particle size) of >6 µm in Gorilla Glass itself can cause micro-scratches and blind the surface. Even coarser diamond powder >25 µm can cause visible scratches even in Gorilla Glass.

Daher wird zur Kratzerentfernung bevorzugt zumindest im letzten Arbeitsschritt eine Körnung von deutlich unter 6 µm verwendet. Bessere und vor Allem schnellere Ergebnisse werden allerdings erhalten, wenn das Polieren mehrstufig (zumindest zweistufig) durchgeführt wird. In diesem Fall kann die Körnung schrittweise von grobkörnig (z.B. 6,0 - 25,0 µm, bevorzugt 6,0 - 10,0 µm) über mittlere Körnung(en) (z.B. 1,0 - 6,0 µm; 1,0 - 3,0 µm; 1,5 - 2,5 µm) zu feinkörnig (z.B. 0,2 - 1,0 µm) abgestuft werden, wobei die grobe Körnung und/oder eine oder mehrere der mittleren Körnungen auch weggelassen werden können. Besonders bevorzugt wird das Polieren mehrstufig (z.B. zweistufig) durchgeführt, wobei zumindest ein Poliervorgang mit mittlerer Teilchengröße der Polierkörper (z.B. D50 im Bereich 1,0 - 6,0 µm, 1,0 - 3,0 µm, oder 1,5 - 2,5 µm) und zumindest ein Poliervorgang mit feiner Teilchengröße (z.B. D50 im Bereich von 0,2 - 1,0 µm, 0,4 - 1,0 µm, 0,5 - 1,0 µm, oder 0,6 - 0,9 µm) durchgeführt wird.Therefore, a grain size of significantly less than 6 µm is preferably used to remove scratches, at least in the last step. Better and, above all, faster results are obtained, however, if the polishing is carried out in several stages (at least two stages). In this case, the grain size can be gradually increased from coarse grain (e.g. 6.0 - 25.0 µm, preferably 6.0 - 10.0 µm) to medium grain(s) (e.g. 1.0 - 6.0 µm; 1.0 - 3.0 µm; 1.5 - 2.5 µm) to fine grain (e.g. 0.2 - 1.0 µm), whereby the coarse grain and/or one or more of the medium grains can also be omitted. Particularly preferably, the polishing is carried out in several stages (e.g. two stages), wherein at least one polishing process is carried out with a medium particle size of the polishing bodies (e.g. D50 in the range 1.0 - 6.0 µm, 1.0 - 3.0 µm, or 1.5 - 2.5 µm) and at least one polishing process is carried out with a fine particle size (e.g. D50 in the range 0.2 - 1.0 µm, 0.4 - 1.0 µm, 0.5 - 1.0 µm, or 0.6 - 0.9 µm).

Die Teilchengrößenverteilung der Polierteilchen ist bevorzugt eng. Speziell sollte die Menge an Teilchen mit besonders großen Teilchengrößen gering sein. Der D99 Wert ist daher bevorzugt höchstens das 2,5-fache des D50 Werts, besonders bevorzugt höchstens das 2,3-fache, das 2,2-fache, oder das 2,1-fache.The particle size distribution of the polishing particles is preferably narrow. In particular, the amount of particles with particularly large particle sizes should be small. The D99 value is therefore preferably at most 2.5 times the D50 value, particularly preferably at most 2.3 times, 2.2 times, or 2.1 times.

Somit umfasst das Set in der Erfindung bevorzugt zusätzlich zu der Polierpaste (dann als erste Polierpaste bezeichnet) eine zweite Polierpaste, die zweite Schleifmittelkörper enthält, wobei die zweiten Schleifmittelkörper eine geringere mittlere Teilchengröße (D50) als die Schleifmittelkörper der ersten Polierpaste (dann als erste Schleifmittelkörper bezeichnet) aufweisen.Thus, in the invention, the set preferably comprises, in addition to the polishing paste (then referred to as first polishing paste), a second polishing paste containing second abrasive bodies, wherein the second abrasive bodies have a smaller average particle size (D50) than the abrasive bodies of the first polishing paste (then referred to as first abrasive bodies).

Bevorzugt weisen die zweiten Schleifmittelkörper eine mittlere Teilchengröße von höchstens 70%, bevorzugt höchstens 50%, höchstens 45%, oder höchstens 40% der mittleren Teilchengröße der ersten Schleifmittelkörper auf. Bevorzugt sind es 20% oder mehr, ebenfalls bevorzugt 25% oder mehr. Durch eine angemessene Abstufung lassen sich unnötige Arbeitsschritte vermeiden.The second abrasive bodies preferably have an average particle size of at most 70%, preferably at most 50%, at most 45%, or at most 40% of the average particle size of the first abrasive bodies. Preferably it is 20% or more, also preferably 25% or more. Unnecessary work steps can be avoided by appropriate grading.

Speziell in einem Polierverfahren mit genau zwei Pasten liegt die mittlere Teilchengröße der ersten Schleifmittelkörper bevorzugt in einem Bereich von 1,0 bis 6,0 µm, besonders bevorzugt 1,3 bis 3,0 µm liegt und die mittleren Teilchengröße der zweiten Schleifmittelkörper bevorzugt in einem Bereich von 0,1 bis 1,5 µm, besonders bevorzugt 0,5 bis 1,2 µm. So kann mit lediglich zwei Polierpasten eine Entfernung sichtbarer Kratzer zusammen mit einer Feinpolitur zur Entfernung von Mikrokratzern effektiv vorgenommen werden. In diesem Fall ist es bevorzugt, in einem weiteren Arbeitsschritt (bevorzugt dem letzten Polierschritt) ein zusätzliches Polierwerkzeug zu verwenden, das eine geringere Härte aufweist als das erste Polierwerkzeug. So kann eine fein polierte Oberfläche geschaffen werden.Specifically in a polishing process with exactly two pastes, the average particle size of the first abrasive body is preferably in a range from 1.0 to 6.0 µm, particularly preferably 1.3 to 3.0 µm, and the average particle size of the second abrasive body is preferably in a range from 0.1 to 1.5 µm, particularly preferably 0.5 to 1.2 µm. In this way, visible scratches can be effectively removed together with a fine polish to remove micro-scratches using just two polishing pastes. In this case, it is preferable to use an additional polishing tool in a further work step (preferably the last polishing step) that has a lower hardness than the first polishing tool. In this way, a finely polished surface can be created.

Ferner enthält das Set bevorzugt zusätzlich zu dem Polierwerkzeug (dann als erstes Polierwerkzeug bezeichnet) ein zweites spatelartiges Polierwerkzeug umfasst, wobei das zweite Polierwerkzeug eine geringere Härte (z.B. aus einem weichen Material bzw. Holz, wie etwa Lindenholz) als das erste Polierwerkzeug (z.B. aus einem harten oder mittelharten Material bzw. Holz, wie etwa Birkenholz) aufweisen kann. Die bevorzugten Formen und Abmessungen des zweiten Polierwerkzeugs sind bevorzugt entsprechend den bevorzugten Formen und Abmessungen des ersten Polierwerkzeugs, die oben beschrieben sind.Furthermore, the set preferably contains, in addition to the polishing tool (then referred to as the first polishing tool), a second spatula-like polishing tool, wherein the second polishing tool can have a lower hardness (e.g. made of a soft material or wood, such as linden wood) than the first polishing tool (e.g. made of a hard or medium-hard material or wood, such as birch wood). The preferred shapes and dimensions of the second polishing tool are preferably corresponding to the preferred shapes and dimensions of the first polishing tool described above.

Alternativ kann das erste (oder einzige) Polierwerkzeug in einem zwei- oder mehrstufigen Polierverfahren so verwendet werden, dass zumindest für den letzten Polierschritt die zuvor noch ungenutzte Seite verwendet wird und/oder vor zumindest dem letzten Polierschritt das Polierwerkzeug abgeschliffen wird. Dazu kann in dem Set ein Schleifwerkwerkzeug (z.B. Schleifpapier) enthalten sein. So kann das "Verschleppen" von groben Schleifmittelkörpern in einen Polierschritt mit feinen Schleifmittelkörpern verhindert werden.Alternatively, the first (or only) polishing tool can be used in a two- or multi-stage polishing process in such a way that the previously unused side is used at least for the last polishing step and/or the polishing tool is ground down before at least the last polishing step. For this purpose, the set can contain a grinding tool (e.g. sandpaper). This can prevent coarse abrasives from being "carried over" into a polishing step with fine abrasives.

Bevorzugt umfasst das Set ferner ein Stoffstück, bevorzugt einen Stoff mit sehr feinen Fasern (Mikrofasertuch). Das Stoffstück (bzw. Tuch) kann an dem Ende des Polierwerkzeugs angebracht werden, das beim Polieren mit der Glasoberfläche in Kontakt steht. Der Stoff kann beispielsweise ein Webstoff oder ein Vliesstoff sein. Es hat sich gezeigt, dass die Polierwirkung durch einen geeigneten Stoff nicht beeinträchtigt wird. Viel mehr kann durch das Stoffstück ein "wegschieben" der Polierpaste weitgehend unterbunden werden. So saugt sich das Stoffstück mit der Polierpaste quasi voll und versorgt das Ende des Polierwerkzeugs stetig mit Polierpaste. Dadurch kann nicht nur Zeit eingespart werden (da die Paste nicht erst wieder in den Arbeitsbereich zurückgeschoben werden muss), sondern es kann zudem ein gleichmäßigeres Polieren stattfinden. Das Poliertuch sollte möglichst dünn sein (z.B. 0,1 - 1,0 mm, bevorzugt 0,3 - 0,5 mm) und eine möglichst geringe Federwirkung aufweisen, damit eine optimale Kraftübertragung auf die Oberfläche stattfindet. Ferner kann das Polieren mit dem Stoffstück mit deutlich weniger Polierpaste durchgeführt werden und ist somit wesentlich sparsamer. Ferner hat sich herausgestellt, dass bei Verwendung eines solchen Poliertuches die Härte des Polierwerkzeuges sowie dessen Material (Holz oder Kunststoff) nur noch eine untergeordnete Rolle spielt. Daher können bei Verwendung eines Poliertuchs mehrere (auch alle) Polierschritte unter Verwendung nur einer Polierhilfe (oder mehrerer Polierhilfen aus demselben Material) durchgeführt werden, ohne das Ergebnis zu beeinträchtigen. Durch die Verwendung eines Poliertuches für jede der Pasten kann auch eine Kontaminierung der feineren Pasten mit den größeren Schleifmittelkörpern der gröberen Pasten und damit neue Kratzer beim Feinpolieren vermieden werden.Preferably, the set further comprises a piece of fabric, preferably a fabric with very fine fibers (microfiber cloth). The piece of fabric (or cloth) can be attached to the end of the polishing tool that is in contact with the glass surface during polishing. The fabric can be, for example, a woven fabric or a nonwoven fabric. It has been shown that the polishing effect can be increased by a suitable material is not impaired. In fact, the piece of material can largely prevent the polishing paste from being "pushed away". The piece of material soaks up the polishing paste and constantly supplies the end of the polishing tool with polishing paste. This not only saves time (since the paste does not have to be pushed back into the work area), but also allows for more even polishing. The polishing cloth should be as thin as possible (e.g. 0.1 - 1.0 mm, preferably 0.3 - 0.5 mm) and have as little spring effect as possible so that the force is optimally transferred to the surface. Furthermore, polishing with the piece of material can be carried out with significantly less polishing paste and is therefore much more economical. It has also been found that when using such a polishing cloth, the hardness of the polishing tool and its material (wood or plastic) only play a minor role. Therefore, when using a polishing cloth, several (even all) polishing steps can be carried out using only one polishing aid (or several polishing aids made of the same material) without affecting the result. By using a polishing cloth for each of the pastes, contamination of the finer pastes with the larger abrasive bodies of the coarser pastes can also be avoided, thus preventing new scratches during fine polishing.

Bei Verwendung eines Poliertuchs in einem mehrstufigen Polierverfahren sollte das Tuch nach jedem Polierschritt, zumindest aber vor dem letzten Polierschritt gewechselt werden (oder bei einem länglichen Tuch die Polerstelle gewechselt werden). In diesem Fall kann auch auf ein Abschleifen des Polierwerkzeugs (oder auf einen Austausch bzw. einen Wechsel der Polierseite) verzichtet werden, da sich die groben Schleifmittelkörner aus früheren Polierschritten durch das Tuch nicht negativ auswirken.When using a polishing cloth in a multi-stage polishing process, the cloth should be changed after each polishing step, or at least before the last polishing step (or, if the cloth is long, the polishing point should be changed). In this case, grinding down the polishing tool (or replacing or changing the polishing side) is not necessary, as the coarse abrasive grains from previous polishing steps do not have a negative effect on the cloth.

Zum schnellen und einfachen Wechseln (oder Verschieben) des Poliertuchs wird dieses bevorzugt temporär an dem Polierwerkzeug befestigt. Beispielsweise wird das Tuch so über die Polierspitze (bzw. das Polierende) des Werkzeugs gelegt, dass bevorzugt die gesamte Polieroberfläche mit dem Tuch bedeckt ist. Dann wird das Tuch bevorzugt an einem weiter hinten (bzw. mittig) gelegenen Teil des Polierwerkzeugs befestigt. Dies kann beispielsweise mit einer einfachen Klammer (z.B. aus Metall oder Kunststoff, beispielsweise eine Büroklammer oder ein Clip) oder bevorzugt mit einem Gummi (Gummiring) geschehen. Das Set enthält daher bevorzugt eine Klammer oder einen Gummi(ring) zum Befestigen des Tuchs an dem Polierwerkzeug.To change (or move) the polishing cloth quickly and easily, it is best to temporarily attach it to the polishing tool. For example, the cloth is placed over the polishing tip (or polishing end) of the tool so that the entire polishing surface is covered with the cloth. The cloth is then preferably attached to a part of the polishing tool further back (or in the middle). This can be done, for example, with a simple clip (e.g. made of metal or plastic, such as a paper clip or a clip). or preferably with a rubber (rubber ring). The set therefore preferably contains a clamp or a rubber (ring) to attach the cloth to the polishing tool.

Wenn mehrere Tücher in dem Set vorhanden sind so sind diese bevorzugt gekennzeichnet (z.B. farblich), um eine Verwechslung zu verhindern, selbst wenn der Poliervorgang unterbrochen wird oder mehrmals mehrstufig poliert wird.If there are several cloths in the set, they are preferably marked (e.g. by color) to prevent confusion, even if the polishing process is interrupted or multiple polishing steps are carried out.

Die Zusammensetzung der Schleifpasten (bzw. Polierpasten) ist nicht insbesondere begrenzt. Bevorzugte Teilchengrößen der Schleifmittelkörper (bzw. Polierkörper) sind bereits oben besprochen. Die Pasten weisen bevorzugt einen Anteil an Schleifmittelkörpern in einem Bereich von 5 bis 50 Gew.-%, bevorzugt zumindest 10 Gew.-%, zumindest 15 Gew.-%, zumindest 20 Gew.-%, oder zumindest 25 Gew.-%, ebenfalls bevorzugt höchstens 45 Gew.-% oder höchstens 40 Gew.-% auf.The composition of the grinding pastes (or polishing pastes) is not particularly limited. Preferred particle sizes of the abrasive bodies (or polishing bodies) have already been discussed above. The pastes preferably have a proportion of abrasive bodies in a range from 5 to 50% by weight, preferably at least 10% by weight, at least 15% by weight, at least 20% by weight, or at least 25% by weight, likewise preferably at most 45% by weight or at most 40% by weight.

Die Pasten haben bevorzugt eine Zusammensetzung (speziell eine Viskosität), die ein schnelles Absetzen der Schleifmittelkörper verhindert. Dies kann auf mehrere Arten erreicht werden. So könne z.B. Öl- bzw. Wachs-basierte Zusammensetzungen verwendet werden, die zusätzlich zu den Schleifmittelkörpern Öl (z.B. Mineralöl), ggf. Wachs (z.B. Paraffinwachs) und ggf. Stabilisatoren (z.B. amorphes pyrogenes Siliziumoxid) enthalten. Ebenso sind Emulsionen verwendbar, z.B. Öl-in-Wasser (O/W) Emulsionen (z.B. mit Mineralöl und/oder Pflanzenöl, wie etwa Olivenöl, und Emulgatoren, sowie ggf. Stabilisatoren, Wachs und weiteren Hilfsmitteln), oder Wasser-in-Öl (W/O) Emulsionen (z.B. mit Silikonöl und Emulgatoren, ggf. Stabilisatoren, Konservierungsmitteln und sonstigen Hilfsmitteln).The pastes preferably have a composition (especially a viscosity) that prevents the abrasive particles from settling quickly. This can be achieved in several ways. For example, oil- or wax-based compositions can be used which, in addition to the abrasive particles, contain oil (e.g. mineral oil), possibly wax (e.g. paraffin wax) and possibly stabilizers (e.g. amorphous pyrogenic silicon oxide). Emulsions can also be used, e.g. oil-in-water (O/W) emulsions (e.g. with mineral oil and/or vegetable oil, such as olive oil, and emulsifiers, and possibly stabilizers, wax and other auxiliaries), or water-in-oil (W/O) emulsions (e.g. with silicone oil and emulsifiers, possibly stabilizers, preservatives and other auxiliaries).

Vorgestellt werden hier auch Pasten, die ein Schleifmittel enthalten (bevorzugt wie oben spezifiziert und bevorzugt in den oben genannten Mengen) und vornehmlich auf PEG (Polyethylenglycol) basieren. Dabei werden die Eigenschaften der Pasten durch Mischen verschiedener PEGs (Polyethylenglycole) eingestellt, speziell werden PEGs unterschiedlicher (durchschnittlicher) Molekulargewichte vermischt. Eine Mischung kann beispielsweise 10-50 Gew.-% PEG-100, 5-30 Gew.-% (PEG-400) und 1-20 Gew.-% PEG-6000 enthalten (Rest Schleifmittel). Ein anderes Beispiel enthält PEG-200 (z.B. 50-80 Gew.-%) und PEG-6000 (z.B. 5-20 Gew.-%) (Rest Schleifmittel). Allgemein enthält eine PEGbasierte Paste bevorzugt das Schleifmittel (bevorzugt wie oben spezifiziert und bevorzugt in den oben genannten Mengen), 30-80 Gew.-% (bevorzugt 40-70 Gew.-%) PEG <1000, 1-20 Gew.-% (bevorzugt 5-15 Gew.-%) PEG ≥ 1000 (bevorzugt PEG ≥2000, PEG ≥3000 oder PEG ≥4000) und 0-5 Gew.-% (bevorzugt ≤3 Gew.-%) sonstige Stoffe (wie Stabilisatoren, Emulgatoren, Konservierungsmittel, Hilfsmittel).Also presented here are pastes that contain an abrasive (preferably as specified above and preferably in the amounts mentioned above) and are primarily based on PEG (polyethylene glycol). The properties of the pastes are adjusted by mixing different PEGs (polyethylene glycols), specifically PEGs with different (average) molecular weights are mixed. A mixture can, for example, contain 10-50 wt.% PEG-100, 5-30 wt.% (PEG-400) and 1-20 wt.% PEG-6000 (remainder abrasives). Another example contains PEG-200 (e.g. 50-80 wt.%) and PEG-6000 (e.g. 5-20 wt.%) (remainder abrasive). In general, a PEG-based paste preferably contains the abrasive (preferably as specified above and preferably in the amounts mentioned above), 30-80 wt.% (preferably 40-70 wt.%) PEG <1000, 1-20 wt.% (preferably 5-15 wt.%) PEG ≥ 1000 (preferably PEG ≥2000, PEG ≥3000 or PEG ≥4000) and 0-5 wt.% (preferably ≤3 wt.%) other substances (such as stabilizers, emulsifiers, preservatives, auxiliaries).

Die Erfindung betrifft die Verwendung eines Sets wie oben beschrieben Polieren einer Glasoberfläche, speziell zum Entfernen von Kratzern aus einer Glasoberfläche. Die Verwendung wird dabei bevorzugt wie oben skizziert durchgeführt, insbesondere bevorzugt mehrstufig (z.B. zweistufig), z.B. unter Verwendung zweier Polierpasten und zweier verschiedener Polierwerkzeuge.The invention relates to the use of a set as described above for polishing a glass surface, especially for removing scratches from a glass surface. The use is preferably carried out as outlined above, particularly preferably in several stages (e.g. two stages), e.g. using two polishing pastes and two different polishing tools.

Die Verwendung umfasst daher bevorzugt das Aufbringen der Polierpaste auf die Glasoberfläche, gefolgt von Polieren der Glasoberfläche mit Hilfe des Polierwerkzeugs, an dem optional ein Stoffstück, bevorzugt ein Mikrofasertuch befestigt ist.The use therefore preferably comprises applying the polishing paste to the glass surface, followed by polishing the glass surface with the aid of the polishing tool, to which a piece of fabric, preferably a microfiber cloth, is optionally attached.

Insbesondere ist es bevorzugt, im ersten Schritt mit der Polierpaste vorhandene (tiefe) Kratzer zu entfernen. Es sind anschließend nur noch Mikrokratzer auf der Oberfläche zu erkennen. In einem zweiten Schritt werden dann mit einer feinen Paste diese Mikrokratzer entfernt und die Glasoberfläche somit auf Hochglanz poliert. Als Polierhilfe wird der Polierstab und optional ein Stoffstück (bevorzugt ein Mikrofasertuch), welches an der Spitze des Polierstabes befestigt wird, verwendet. Das Mikrofasertuch saugt sich sehr gut mit der Paste voll, was den Poliervorgang stark erleichtert und effektiver gestaltet.In particular, it is preferable to use the polishing paste to remove existing (deep) scratches in the first step. Only micro-scratches will then be visible on the surface. In a second step, these micro-scratches are removed with a fine paste and the glass surface is polished to a high gloss. The polishing rod and optionally a piece of cloth (preferably a microfiber cloth) that is attached to the tip of the polishing rod are used as polishing aids. The microfiber cloth absorbs the paste very well, which makes the polishing process much easier and more effective.

Beispieleexamples

Die Erfindung wird anhand von Beispielen verdeutlicht. Die Erfindung ist allerdings nicht auf die offenbarten Beispiele begrenzt.The invention is illustrated by examples. However, the invention is not limited to the disclosed examples.

Beispiel 1:Example 1:

Eine Paste mit polykristallinem Diamantpulver (Körnung D50=1,4 µm; D99<2,9 µm) wurde zum Polieren von vorgespanntem Glas (Smartphonedisplay) verwendet, um einen einzelnen sichtbaren Kratzer zu entfernen. Als Polierhilfe wurde ein Birkenholzspatel verwendet (Quaderartiges Holzplättchen L: 15,0 cm, B: 1,0 cm, T: 0,50 cm, an einer Seite abgeflacht mit (3=45°), der mit einem Mikrofasertuch umspannt war (eine einzelne Lage Tuch war um die Spitze gelegt und mit einem Gummi-Ring ca. 2 cm von der Spitze entfernt fixiert).A paste with polycrystalline diamond powder (grain size D50=1.4 µm; D99<2.9 µm) was used to polish tempered glass (smartphone display) to remove a single visible scratch. A birchwood spatula was used as a polishing aid (cuboid-like wooden plate L: 15.0 cm, W: 1.0 cm, D: 0.50 cm, flattened on one side with (3=45°), which was wrapped with a microfiber cloth (a single layer of cloth was wrapped around the tip and fixed with a rubber ring approx. 2 cm from the tip).

Im Ergebnis konnte der Kratzer entfernet werden ohne sichtbare neue (Mikro)Kratzer zu erzeugen.As a result, the scratch could be removed without creating any visible new (micro)scratches.

Beispiel 2:Example 2:

Das Prozedere aus Beispiel 1 wurde mit einer Paste wiederholt, bei der die Körnung D50=2,0 µm (D99<3,7) betrug. Anschließend wurde in einem zweiten Schritt mit einer Paste mit einer Körnung von D50=0,7 µm (D99<1,6) poliert. Als Polierhilfe wurde derselbe Birkenholzspatel verwendet, um dessen beim ersten Polieren verwendetes Ende ein neues Stück Mikrofasertuch gewickelt war.The procedure from Example 1 was repeated with a paste with a grain size of D50=2.0 µm (D99<3.7). In a second step, polishing was carried out with a paste with a grain size of D50=0.7 µm (D99<1.6). The same birchwood spatula was used as a polishing aid, with a new piece of microfiber cloth wrapped around the end used for the first polishing.

Die Kratzerentfernung konnte trotz des zweistufigen Verfahrens schneller durchgeführt werden. Zudem konnte man bei genauer Betrachtung eine bessere Qualität (Glattheit) der Glasoberfläche beobachten.Despite the two-stage process, scratch removal was quicker. Moreover, upon closer inspection, the quality (smoothness) of the glass surface was better.

Vergleichsbeispiel 1:Comparison example 1:

Beispiel 1 wurde wiederholt, wobei lediglich die Polierhilfe geändert wurde. Als Polierhilfe wurde die gleiche Art Mikrofasertuch wie in Beispiel 1 ohne weitere Polierhilfe verwendet. Das Mikrofasertuch wurde also mit dem Finger über die Glasoberfläche geführt.Example 1 was repeated, but the polishing aid was changed. The same type of microfiber cloth as in Example 1 was used as the polishing aid, without any additional polishing aid. The microfiber cloth was therefore moved over the glass surface with the finger.

Obwohl die Menge an Polierpaste verdreifacht wurde konnte der Kratzer nicht vollständig entfernt werden.Although the amount of polishing paste was tripled, the scratch could not be completely removed.

Vergleichsbeispiel 2 und 3:Comparison example 2 and 3:

Statt des Mikrofasertuchs aus Vergleichsbeispiel 1 wurde ein Baumwollwebstoff (Vergleichsbeispiel 2) bzw. ein Lederpoliertuch (Vergleichsbeispiel 3) verwendet und ansonsten das Vorgehen von Vergleichsbeispiel 1 wiederholt. Das Ergebnis war wie bei Vergleichsbeispiel 1 unbefriedigend.Instead of the microfiber cloth from Comparative Example 1, a cotton woven fabric (Comparative Example 2) or a leather polishing cloth (Comparative Example 3) was used and otherwise repeated the procedure of Comparative Example 1. As with Comparative Example 1, the result was unsatisfactory.

Vergleichsbeispiel 4:Comparison example 4:

Das Vorgehen aus Vergleichsbeispiel 1 wurde wiederholt, wobei als zu polierende Oberfläche das gleiche Glas wie in Beispiel 1 verwendet wurde, das allerdings lediglich Mikrokratzer aufwies.The procedure from Comparative Example 1 was repeated, using the same glass as in Example 1 as the surface to be polished, but which only had micro-scratches.

Selbst die Mikrokratzer konnten mit dem Mikrofasertuch als einzige Polierhilfe nicht entfernt werden. Es verblieben trübe bzw. blinde Stellen im Glas.Even the micro-scratches could not be removed using the microfiber cloth as the only polishing aid. Cloudy or blind spots remained in the glass.

Claims (16)

  1. A use of a kit for polishing a glass surface, the kit comprising:
    a polishing paste containing abrasive bodies, and
    a polishing stick in the shape of a spatula.
  2. The use according to claim 1, wherein the abrasive bodies are made of a material having a Mohs hardness of 5.5 or more, preferably 7.0 or more, 8.0 or more, 9.0 or more, more preferably 9.2 or more.
  3. The use according to claim 1 or 2, wherein the abrasive bodies are made of a material selected from the group consisting of diamond (monocrystalline or preferably polycrystalline diamond), alumina (Al2O3), boron carbide, silicon carbide, cerium oxide and boron nitride.
  4. The use according to any one of claims 1 to 3, wherein the polishing stick is made of wood or plastic.
  5. The use according to any one of claims 1 to 4, wherein the polishing stick has a length of at least 2 cm, preferably at least 3 cm, at least 4 cm, at least 5 cm, at least 6 cm, at least 7 cm, at least 9 cm, at least 10 cm, or at least 11 cm; and/or
    has a length of at most 35 cm, preferably at most 30 cm, at most 28 cm, at most 26 cm, at most 25 cm, at most 24 cm, at most 23 cm, at most 22 cm or at most 21 cm, and particularly preferably has a length in a range from 13 to 17 cm.
  6. The use according to any one of claims 1 to 5, wherein the polishing stick has a width of at most 2.5 cm, preferably at most 2.0 cm, at most 1.5 cm, or at most 1.0 cm; and/or
    has a width of at least 0.3 cm, at least 0.4 cm, at least 0.5 cm, at least 0.6 cm or at least 0.7 cm, and particularly preferably has a width in a range from 0.5 to 1.5 cm.
  7. The use according to any one of claims 1 to 6, wherein the polishing stick has a thickness of at most 1.50 cm, preferably at most 1.30 cm, at most 1.20 cm, at most 1.10 cm, at most 1.00 cm, or at most 0.90 cm; and/or
    has a thickness of at least 0.05 cm, preferably at least 0.10 cm, at least 0.15 cm, at least 0.20 cm, at least 0.30 cm, at least 0.40 cm or at least 0.45 cm, and particularly preferably has a thickness in the range from 0.20 to 1.00 cm.
  8. The use according to any one of claims 1 to 7, wherein the polishing stick has an aspect ratio (L/T) of length (L) to thickness (T) of at least 6, preferably at least 8, at least 10, at least 15, at least 20 or at least 25; and/or
    an aspect ratio (L/T) of 100 or less, preferably 90 or less, 80 or less or 70 or less; and/or
    an aspect ratio (B/T) of width (B) to thickness (T) of 1.3 or more, preferably 1.5 or more, 1.7 or more, 1.9 or more, 2.0 or more, 2.1 or more or 2.2 or more; and/or
    an aspect ratio (B/T) of 5.0 or less, preferably 4.0 or less, 3.5 or less, 3.2 or less or 3.0 or less.
  9. The use according to any one of claims 1 to 8, wherein the abrasive bodies have a mean particle size in a range from 0.05 to 25.0 µm, preferably from 0.10 to 15.0 µm, from 0.10 to 12.0 µm, from 0.10 to 10.0 µm, from 0.10 to 8.0 µm, from 0.10 to 6.0 µm, or from 0.10 to 4.0 µm.
  10. The use according to any one of claims 1 to 9, wherein the set comprises, in addition to the polishing paste (first polishing paste), a second polishing paste containing second abrasive bodies, wherein the second abrasive bodies have a smaller mean particle size than the abrasive bodies of the first polishing paste (first abrasive bodies).
  11. The use according to claim 10, wherein the second abrasive bodies have a mean particle size of at most 70%, preferably at most 50%, at most 45%, at most 40% of the mean particle size of the first abrasive bodies.
  12. The use according to claims 10 or 11, wherein the mean particle size of the first abrasive bodies is in the range from 1.0 to 6.0 µm, preferably from 1.0 to 4.0 µm and the mean particle size of the second abrasive bodies is in a range from 0.1 to 1.5 µm, preferably from 0.4 to 1.3 µm.
  13. The use according to any one of claims 1 to 12, wherein the set comprises, in addition to the polishing stick (first polishing stick), a second polishing stick in the shape of a spatula, wherein the second polishing stick has a lower hardness than the first polishing stick.
  14. The use according to any one of claims 1 to 13, wherein the set further comprises a piece of fabric, preferably a thin microfiber cloth for covering the polishing face of the polishing stick,
    wherein the set further preferably comprises a fastening material, such as a clamp or a rubber ring, for reversibly fastening the piece of fabric to the polishing stick.
  15. The use according to any one of claims 1 to 14 for removing scratches from a glass surface.
  16. The use according to one of claims 1 to 15, comprising applying the polishing paste to the glass surface, followed by polishing the glass surface with the aid of the polishing stick, to which a piece of fabric, preferably a microfiber cloth, is optionally attached.
EP17210109.9A 2016-12-23 2017-12-22 Scratch remover for glass Active EP3338951B1 (en)

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DE102016125546.7A DE102016125546A1 (en) 2016-12-23 2016-12-23 Scratch remover for glass

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EP3338951C0 EP3338951C0 (en) 2025-02-26
EP3338951B1 true EP3338951B1 (en) 2025-02-26

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105538076A (en) * 2016-02-05 2016-05-04 刘汝河 Polishing paste for glass and glass polishing repair method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH492521A (en) * 1969-02-01 1970-06-30 Boesch Wisselink Maria Electrically insulating polishing spatula with interchangeable tongue
US20120309273A1 (en) * 2011-06-06 2012-12-06 Popov Georgi M Hand-powered polishing apparatus and kit for stainless steel sinks
DE202016002602U1 (en) * 2016-04-21 2016-05-19 Gerd Eisenblätter Gmbh Polishing tool with integrated polishing paste

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105538076A (en) * 2016-02-05 2016-05-04 刘汝河 Polishing paste for glass and glass polishing repair method

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EP3338951A1 (en) 2018-06-27
DE102016125546A1 (en) 2017-03-23

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