WO2025105984A1 - Self-adhesive abrasive belt - Google Patents

Abstract

The utility model relates to the field of grinding and polishing, and more particularly to constructional features of flexible abrasive materials entailing the use of adhesives for the attachment of grinding elements, and even more particularly to a self-adhesive abrasive belt for a grinding machine. The technical result consists in increasing the operational strength of the connection between the ends of a self-adhesive abrasive belt. This technical result is achieved by the presence of an abrasive layer adhered to the upper side of a double-sided adhesive belt by means of a substrate, wherein one end of the unattached self-adhesive abrasive belt has a region of double-sided adhesive belt with no abrasive layer, and the other end has a region of abrasive layer with no double-sided adhesive belt.

Description

SELF-ADHESIVE ABRASIVE TAPE

DESCRIPTION

The field of technology to which the utility model relates.

The utility model relates to the field of grinding and polishing, in particular to structural elements for flexible abrasive materials using adhesives for gluing grinding elements, namely, to a self-adhesive abrasive belt for a sharpening machine [B24D11/00, B24D18/0072],

State of the art.

The prior art discloses a COMPOSITE ABRASIVE SANDPAPER [CN216759527U, published 17.06.2022], which is open-ended and includes an abrasive layer attached to the upper side of a double-sided adhesive tape by means of a backing.

The disadvantages of the analogue are the formation of an open gap between the ends of the adhesive tape when gluing end-to-end, which leads to the ends of the tape coming off the grinding wheel during grinding, as well as the formation of a protruding part when attaching two ends of the tape overlapping on the periphery of the grinding wheel, which leads to the peeling off of not only the end of the tape, but also the entire tape from the grinding wheel during operation.

Also known from the prior art is an ANTI-SLIP TAPE ЗМ OF MEDIUM GRAIN https://kurl.ru/vYHrc, containing an abrasive layer attached to the upper side of a double-sided adhesive tape by means of a backing.

The disadvantages of the analogue are the formation of an open gap between the ends of the adhesive tape when gluing end-to-end, which leads to the ends of the tape coming off the grinding wheel during grinding, as well as the formation of a protruding part when attaching two ends of the tape overlapping on the periphery of the grinding wheel, which leads to the peeling off of not only the end of the tape, but also the entire tape from the grinding wheel during operation.

The closest in technical essence is the ABRASIVE TAPE FOR MANICURE OR PEDICURE FILES AND A HOLDER FOR IT [WO2020149816A1, published 23.07.2020], containing an abrasive layer attached to the upper side of a double-sided adhesive tape by means of a backing. The tape can be rolled into a roll. The surface of the consumable tape is provided with symbols on both sides to indicate the length.

The disadvantages of the prototype are the formation of an open gap between the ends of the adhesive tape when gluing end to end, which leads to the ends of the tape peeling off grinding wheel during grinding, as well as the formation of a protruding part when attaching two ends of the tape overlapping on the periphery of the grinding wheel, which leads to the peeling off of not only the end of the tape, but also the entire tape from the grinding wheel during operation.

Disclosure of the essence of the utility model.

The technical problem that the claimed utility model is aimed at solving is the creation of a self-adhesive abrasive tape with increased operational strength of the fastening of the ends of this tape.

The technical result is an increase in the operational strength of the fastening of the ends of the self-adhesive abrasive tape.

The specified technical result is objectively manifested in an increase in the duration of fastening the ends to the periphery of the grinding wheel during operation.

The specified technical result is provided by an open self-adhesive abrasive tape containing an abrasive layer attached to the upper side of a double-sided adhesive tape by means of a backing, wherein the open self-adhesive abrasive tape has a section of double-sided adhesive tape without an abrasive layer at one end and has a section of an abrasive layer without double-sided adhesive tape at the other end.

In particular, the abrasive of the abrasive layer is made of silicon carbide or garnet, or aluminum oxide, or ceramic abrasive.

In particular, the backing is made of paper or fabric.

In particular, an adhesive layer is applied to the substrate in the area without double-sided adhesive tape.

In particular, the backing on the adhesive layer has a protective layer.

In particular, the bottom side of the double-sided adhesive tape has a protective layer of siliconized paper.

In particular, the section of double-sided adhesive tape without an abrasive layer has a protective layer of siliconized paper.

In particular, an adhesion activator is additionally applied to the section of double-sided adhesive tape without an abrasive layer.

In particular, the section without the abrasive layer and the section without double-sided adhesive tape have the same length.

In particular, the area without an abrasive layer, the area without double-sided adhesive tape have symbols and marks.

Brief description of the drawings. Fig. 1 shows a cross-section of a self-adhesive abrasive tape.

Fig. 2 shows a general view of the self-adhesive abrasive tape.

Fig. 3 shows the arrangement of the self-adhesive abrasive belt on the sharpening machine.

Fig. 4 shows the overlapping connection of the ends of the self-adhesive abrasive tape.

Fig. 5 shows a butt joint connection of the ends of a self-adhesive abrasive belt, known from the prior art.

The figures show: 1 - abrasive layer, 2 - double-sided adhesive tape, 3 - protective layer, 4 - abrasive, 5 - backing, 6 - section without abrasive layer, 7 - section without double-sided adhesive tape, 8 - grinding wheel, 9 - sharpening machine.

Implementation of a utility model.

The self-adhesive abrasive tape comprises an abrasive layer 1 attached to a double-sided adhesive tape 2, to the other side of which a protective layer 3 is attached.

The abrasive layer 1 is made of an abrasive 4, for example silicon carbide, garnet, aluminum oxide, ceramic abrasive, and is attached to a double-sided adhesive tape 2 by means of a backing 5 made of paper or fabric, to which, in turn, it is attached using a binding material, for example resin.

The double-sided adhesive tape 2 comprises a base, for example made of foamed polyethylene, polypropylene or fabric, with an adhesive layer applied to both sides, for example rubber or acrylic. The abrasive layer 1 is fixed to one side of the double-sided adhesive tape 2 in such a way that on one side of the self-adhesive abrasive tape there is a section 6 without an abrasive layer 1, and on the other side there is a section 7 without a double-sided adhesive tape 2. Sections 6 and 7 are preferably of the same length, which makes it possible to create a self-adhesive abrasive tape that is adjustable in length and adapted to a wide range of circumference diameters. Preferably, sections 6 and 7 have marks and symbols indicating how much section 6 and 7 must be trimmed to cover the required circumference diameter.

On section 7, an adhesive layer is preferably added to substrate 5 to further increase the strength of fastening of sections 6 and 7.

An adhesion promoter is preferably applied to section 6 to further increase the strength of the attachment of sections 6 and 7. An adhesion promoter is understood to be a substance that enhances the adhesive effect of self-adhesive materials, such as double-sided adhesive tape, to increase the strength of adhesion of two surfaces. Primer 3M is preferably used as an adhesion promoter. On the other hand, a protective layer 3, for example made of siliconized paper, is attached to the double-sided adhesive tape 2, with the possibility of preventing premature adhesion of the self-adhesive abrasive tape to surfaces.

On the underside of the double-sided adhesive tape, instead of the protective layer 3, a textile layer can be attached with the possibility of fixing to hooks of the Velcro type (Velcro) fastening.

The self-adhesive abrasive belt has the ability to be fixed to the periphery of the grinding wheel 8 of the sharpening machine 9. The width of the self-adhesive abrasive belt corresponds to the thickness of the grinding wheel 8 or disk, which has suitable dimensions for installation on the machine 9. A deviation of the width of the self-adhesive abrasive belt of preferably 1-2 mm from the thickness of the wheel 8 or disk is allowed.

Depending on the grain size of the abrasive 4, the self-adhesive abrasive tape can be used for removing a layer of material, sharpening a cutting tool, and grinding. To change the grain size of the abrasive during work or when replacing a worn-out abrasive tape 1, the self-adhesive abrasive tape can be removed from a grinding wheel or disk that has suitable dimensions for installation on the machine 9, for example with or without a cutting object.

Self-adhesive abrasive tape is used as follows.

The protective layer is removed from the bottom side of the double-sided adhesive tape without touching the adhesive layer. Starting from one end of the tape, where the section without the abrasive layer is located, the self-adhesive abrasive tape is gradually glued to the periphery of a grinding wheel or disc of suitable dimensions for installation on a sharpening machine. When gluing, the tape is smoothed in parallel in order to avoid the formation of air bubbles between the glued surface and the adhesive side of the tape. Moving along the circumference of the disc, the entire tape is glued, containing both the abrasive layer and the double-sided adhesive tape. After this, the protective layer is removed from the section of the double-sided adhesive tape without the abrasive layer. If an additional adhesive layer is applied to the backing on the section of the abrasive layer without the double-sided adhesive tape, the protective layer is also removed from the adhesive layer of the backing. Next, the section without double-sided adhesive tape is glued to the section without the abrasive layer. Pressed tightly for better adhesion of the two parts of the self-adhesive abrasive tape.

Justification of the technical result.

The technical result is an increase in the operational strength of the fastening of the ends of the self-adhesive abrasive tape. The specified technical result is achieved due to the presence of a section of double-sided adhesive tape without an abrasive layer at one end of the tape and a section of an abrasive layer without double-sided adhesive tape at the other end. The section of the abrasive layer without double-sided adhesive tape, when the tape is wrapped around the grinding wheel of the sharpening machine, overlaps the section of the double-sided adhesive tape without an abrasive layer, creating additional adhesion between them and preventing the ends of the tape from shifting relative to each other. Thus, the fastening of the junction of the ends of the tape occurs with an overlap. When fastening with an overlap, the gap between the ends of the adhesive tape is hidden and additionally glued with an abrasive tape, whereas when fastening the tape to the surface to be glued in the form of a circle end-to-end (see Fig. 5), the gap between the ends of the adhesive tape is open, as a result of which, during grinding of the part, its edges can catch on the edges of the deep joint, which leads to the peeling off and tearing off of the entire abrasive tape from the grinding wheel of the sharpening machine, as well as to contact of the part with the rotating wheel, which can lead to an impact effect on the part.

Between the upper layers of the tape, namely at the junction of the section with the abrasive layer and the main part of the abrasive layer, a gap may form, including when sections are incorrectly cut according to the marks in accordance with the diameter of the grinding wheel. The resulting gap between the upper layers of the tape, namely at the junction of the section with the abrasive layer with the main part of the abrasive layer, is resistant to snagging during grinding to a greater extent than in the configuration known from the prior art. As described above, the stability is achieved by overlapping the section of the abrasive layer with the section of the double-sided adhesive tape without the abrasive layer, providing additional adhesion between them and preventing the ends of the tape from shifting relative to each other.

Additionally, the operational strength of the fastening of the ends of the self-adhesive abrasive tape is increased by adding an adhesive layer to the substrate on the section of the abrasive layer without double-sided adhesive tape, due to the presence of adhesive capacity on the two glued sides: the section of double-sided adhesive tape without an abrasive layer and the section of the abrasive layer without double-sided adhesive tape with an adhesive layer on the substrate.

Also, the addition of an adhesion activator to the section of double-sided adhesive tape without an abrasive layer additionally contributes to increasing the operational strength of fastening the ends of the self-adhesive abrasive tape. The adhesion activator enhances the adhesive ability of the adhesive layer of the double-sided adhesive tape, thereby increasing the adhesive strength of the section of the double-sided adhesive tape without an abrasive layer and the section of the abrasive layer without the double-sided adhesive tape of the adhesive layer. Examples.

To quantitatively assess the increase in the operational strength of fastening the ends of the self-adhesive abrasive belt, an experiment was conducted to measure the time of divergence of the ends of the belt from each other on the grinding wheel of a sharpening machine during grinding. Grinding disks made of the same material, having the same width in accordance with the width of the belt and the same diameter, to the periphery of which the test belts were glued, were taken as the glued surface. A stopwatch was used to measure the time. For the experiment, the rotation of the disks on the grinding machine with glued belts was started at the same speed and grinding of identical pointed parts was carried out with the same pressing force during grinding. The time from the start of grinding to the divergence of the ends of the belt from each other was measured on the stopwatch. The obtained values are given in Table 1.

The following self-adhesive abrasive tapes were used as test materials:

- an open self-adhesive abrasive tape containing an abrasive layer attached to the upper side of a double-sided adhesive tape by means of a backing, glued to the periphery of the disc end-to-end (A);

- an open self-adhesive abrasive tape containing an abrasive layer attached to the upper side of a double-sided adhesive tape by means of a backing, wherein the open self-adhesive abrasive tape has a section of double-sided adhesive tape without an abrasive layer at one end and has a section of an abrasive layer without double-sided adhesive tape at the other end, glued to the periphery of the disc with an overlap (B);

- an open self-adhesive abrasive tape, which differs from tape B in that an additional adhesive layer is applied to the backing in the section of the abrasive layer without double-sided adhesive tape, glued to the periphery of the disk with an overlap (B).

- an open self-adhesive abrasive tape, which differs from tape B in that an adhesion activator (G) is additionally applied to the section of the double-sided adhesive tape without an abrasive layer.

Table 1 - Obtained values of the time of divergence of the ends of the belt from each other on the grinding wheel of a sharpening machine during grinding, measured with a stopwatch

The obtained data indicate that the presence of a section of double-sided adhesive tape without an abrasive layer at one end of the self-adhesive abrasive tape and a section of an abrasive layer without double-sided adhesive tape at the other end, allows you to stick the tapes on the periphery of the disk with an overlap, which ensures the absence of a gap between the ends of the tape and leads to an increase in the time it takes for the ends of the tape to diverge from each other on the grinding wheel of the sharpening machine during grinding.

Additionally, the time it takes for the ends of the tape to diverge from each other on the grinding wheel of the sharpening machine during grinding increases with the presence of an adhesive layer on the substrate in the area of the abrasive layer without double-sided adhesive tape and the application of an adhesion activator to the area of the double-sided adhesive tape without an abrasive layer.

Claims

FORMULA 1. An open-loop self-adhesive abrasive tape comprising an abrasive layer attached to the upper side of a double-sided adhesive tape by means of a backing, wherein the open-loop self-adhesive abrasive tape has a section of double-sided adhesive tape without an abrasive layer at one end and has a section of an abrasive layer without double-sided adhesive tape at the other end. 2. A self-adhesive abrasive tape according to claim 1, in which the abrasive of the abrasive layer is made of silicon carbide or garnet, or aluminum oxide, or ceramic abrasive. 3. A self-adhesive abrasive tape according to claim 1, in which the backing is made of paper or fabric. 4. A self-adhesive abrasive tape according to claim 1, in which an adhesive layer is applied to the backing in the area without double-sided adhesive tape. 5. A self-adhesive abrasive tape according to item 4, in which the adhesive layer of the backing has a protective layer. 6. A self-adhesive abrasive tape according to claim 1, in which the lower side of the double-sided adhesive tape has a protective layer of siliconized paper. 7. A self-adhesive abrasive tape according to claim 1, in which the section of the double-sided adhesive tape without the abrasive layer has a protective layer of siliconized paper. 8. A self-adhesive abrasive tape according to claim 1, in which an adhesion activator is additionally applied to the section of the double-sided adhesive tape without the abrasive layer. 9. A self-adhesive abrasive tape according to claim 1, in which the section of double-sided adhesive without an abrasive layer and the section without double-sided adhesive tape have the same length. 10. A self-adhesive abrasive tape according to claim 1, in which the section of double-sided adhesive without an abrasive layer, the section of the abrasive layer without double-sided adhesive tape have symbols and marks.