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EP0748358A1 - Produit moule en materiau cellulosique et vegetal et procede pour sa fabrication - Google Patents

Produit moule en materiau cellulosique et vegetal et procede pour sa fabrication

Info

Publication number
EP0748358A1
EP0748358A1 EP95911200A EP95911200A EP0748358A1 EP 0748358 A1 EP0748358 A1 EP 0748358A1 EP 95911200 A EP95911200 A EP 95911200A EP 95911200 A EP95911200 A EP 95911200A EP 0748358 A1 EP0748358 A1 EP 0748358A1
Authority
EP
European Patent Office
Prior art keywords
shaped body
body according
mixture
weight
cellulose
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95911200A
Other languages
German (de)
English (en)
Inventor
Klaus Gehrmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WVG FORMTEILEWERK GmbH
Original Assignee
WVG FORMTEILEWERK GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WVG FORMTEILEWERK GmbH filed Critical WVG FORMTEILEWERK GmbH
Publication of EP0748358A1 publication Critical patent/EP0748358A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G5/00—Floral handling
    • A01G5/04—Mountings for wreaths, or the like; Racks or holders for flowers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N5/00—Manufacture of non-flat articles
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/28—Polysaccharides or derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
    • C08L3/02—Starch; Degradation products thereof, e.g. dextrin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • Moldings made from cellulose-containing, vegetable material and process for their production
  • the invention relates to a molded body made of cellulose-containing, vegetable material and a process for its production.
  • Shaped bodies made of cellulose-containing, vegetable material, as they are affected here, are known, for example, from gardening practice and are often used as an exchange for plastic bodies in flower binding, for example as a basis for wreaths and arrangements of all kinds, as well as bodies direct insertion of flowers if the body has sufficient penetrability.
  • the bodies made of cellulosic, plant material have the advantage that they consist practically of the same basic substance as the flower parts arranged on them themselves, so that together with these they are sent to waste disposal by composting or the like can. The latter aspect has come to the fore recently, in particular due to environmental pollution reasons.
  • DE-B-1 060 179 describes "underlays for brooches" which consist of a mass of straw fiber or straw pile, an addition of cellulose and a binder and are impregnated on their surface with a water-repellent substance to improve their durability.
  • EP-B-246 588 Another process for the production of such shaped articles is described in EP-B-246 588.
  • the process explained there also wants to avoid the binder in order to improve the biodegradability, and accordingly the claimed shaped bodies are to be produced exclusively from chopped straw and a defibred vegetable fiber material.
  • This publication also mentions molded parts for packaging purposes, furniture parts and panels for the building sector as fields of application for such molded articles made of cellulose-containing material. goal. The use of molded parts made of cellulose-containing material for such purposes was not new.
  • EP-B-246 588 reference is made to other older patent literature.
  • Vegetable, woody or stem material is known to contain elongated cellulose fibers which are bonded to one another in the plant by cement substances, which are extracted in chemical digestion processes in order to obtain the pure cellulose fibers which have the property of hydrogen-bonding when dried from an aqueous environment to form a fixed connection with each other, which is used in papermaking.
  • Such disintegrated materials are referred to in the context of this application based on the custom of the paper industry as fiber material, which forms the "component b" of the molding mixture described here.
  • ground vegetable material is used as the basic substance, from which the binding substances have not been removed, which is why it is referred to in this application as lignocellulose-containing material with regard to one of the most important binding substances, lignin.
  • the comminuted vegetable substance which is still essentially in its natural state, does not have the binding properties of exposed cellulose fibers, so that a dried molded body formed from it would disintegrate again.
  • a is in addition to the basic component lignocellulose-containing material requires a proportion of fiber material as component b.
  • the properties of the shaped body can be influenced further with the addition of a binder, “component c”.
  • component c a binder
  • the object of the invention is to provide moldings which are completely biodegradable and have preferred mechanical properties, in particular as packaging material or as a building material.
  • a molded body which can be used in particular as a building material, has the features of patent claim 1.
  • a molded body that can be used in particular as a packaging body has the features of patent claim 8.
  • Starch is used as the binder for the shaped body according to claim 1, preferably an un-gelatinized raw starch from cereals or potatoes, which on the one hand is biodegradable and on the other hand does not require any additional, pretreating process measures which increase and increase the production costs or the purchase price. may possibly contribute to environmental pollution.
  • the type of processing of the cellulose-containing material also reduces process costs, since both components are comminuted or defibrated in an essentially dry state, which results in savings in plant costs, but also a reduction in wastewater problems. If one speaks here in a substantially dry state, this expression should take into account that each of these natural materials adjusts itself to the environmental conditions in its so-called dry state and therefore always contains a certain residual water content.
  • the starch as a binder is also preferably made available in the dry, pourable state, so that all three solid components for the mixture are dosed dry and only need to be converted into a suspension by adding water directly during mixing.
  • at least the fibrous material is generally made available in an aqueous suspension for the mixture, or the other components are mixed into its aqueous slurry.
  • a special feature of the invention is that only the finished aqueous mixture of all components or even the molded body is heated up to approximately the boiling point of the water in order to achieve a certain gelatinization of the starch in this suspension state.
  • the heating need only be carried out for a relatively short time, and the mixture can be heated into shaped bodies before or after shaping.
  • the starch can be added in an amount such that between about 2 and 20% by weight, based on the weight of the air-dry vegetable material, remains in the molded part after the water has been sucked off.
  • a preferred proportion of starch is between 8 and 12%.
  • the preferred starch content is between 3 and 15% by weight, in particular 5 to 8% by weight.
  • the structure and strength of the molded body to be produced can be influenced by the amount of starch. As will be explained further below, a special surface treatment of the molded parts can be used later to bring starch as a binder into the surface layers of the molded body. If the starch content in the base body is reduced at the same time, molded bodies can be produced which have different hardness or softness in their interior and on their surface, which can be of considerable advantage for certain applications in the packaging area.
  • the used water enriched with the non-gelatinized starch can be fed to a treatment plant, in which it is cleaned of undesired foreign substances and the starch portion remaining in the water is measured, and starch is added to adjust the required input starch portion.
  • the water treated in this way can then be returned to the mixing process, so that a closed water cycle is created.
  • a fat wax is added according to the invention to the mixture of the lignocellulose-containing material and the paper fiber material, the wax fraction based on the dry weight of the mixture being 3 to 15% by weight, preferably about 6% by weight.
  • the fat wax partially prevents the formation of hydrogen bonds between the fibers and thus considerably increases the elasticity of the molded body.
  • the material of the molded body is made hydrophobic by the fat wax.
  • a commercially available fat wax is sold under the name Mulrex 590 by Mobil- ⁇ l. Comminuted vegetable material of various types can be used as the lignocellulose-containing material.
  • shredded wood waste also in sawdust form, which does not necessarily have to have a fiber structure, as is required for so-called wood grinding in paper manufacture, but also coarser wood particles with an elongated structure, which still have certain fiber bundles represent.
  • shredded stem material from annual plants, in particular cereal straw is preferably used.
  • parts thereof can even be present as dust with a grain size of approximately 0.01 mm, as flour with a grain size of approximately 0.1 mm, but also in lengths of up to approximately 200 mm, particles of this size naturally having have an elongated, slim structure and sufficient flexibility to be integrated into the molded body.
  • particle compositions are preferably used, the largest components of which are at lengths in the range from approximately 1 to 8 mm. Practically resulting compositions are such that 80% of the material is close to the target
  • Main length are and deviate from it by a maximum of 5%, 15% as dust and flour portions below and about 5% as longer fibers above.
  • the particle length distribution has a considerable influence on the physical structure of the later body.
  • the degree of fiberization of the waste paper can be roughly characterized by the bulk density, which the fiber flakes produced take up without being compressed.
  • the bulk density can be between 20 kg / m 3 and 30 kg / m 3 , but the waste paper is preferably defibrated so that the uncompressed bulk density of the flakes is approximately 26 kg / m 3 .
  • waste paper As a fiber with a binding effect, all those fibers can be used that are also used in the paper industry, for example cellulose and semi-cellulose.
  • this raw material is in principle no other raw material, since it ultimately consists of paper production fibers.
  • waste paper generally also contains a proportion of wood pulp that does not have the high binding effects that pure cellulose fibers have, which is why when using waste paper the use of fiber generally has to be somewhat higher than when using pure pulp.
  • Straw material as component a and waste paper as component b can be used for the mixture in a ratio of 90% by weight to 10% by weight up to a ratio of 40% by weight to 60% by weight.
  • the mixing ratio is preferably between 70% by weight of component a to 30% by weight of component b and 60% by weight of component a to 40% by weight of component b.
  • the mixing ratio is preferably between 70% by weight of component a to 30% by weight of component b and 60% by weight of component a to 40% by weight of component b for the shaped body which can be used as a building material and between 75% by weight of component a to 25% by weight.
  • the ratio of solids to water in the suspension mixture is also important. It can range from 1: 9 to 1:15. A ratio of solids to water is preferably set in the range from 1:11 to 1:13. A dilution in this area guarantees, on the one hand, that with preferred distribution of the solid particle sizes, even fine mold structures are still adequately filled, but, on the other hand, there is not too much excess water present in the suspension, which water flows directly back through the sieve ⁇ shapes would expire.
  • the production of the shaped body according to claim 8 ge preferably takes place by introducing the paper fiber flakes in about 60% of the total amount of water required.
  • the paper fiber pulp prepared in this way is mixed with the comminuted lignocellulose-containing material, which preferably consists of grain straw that has been comminuted dry in a hammer mill in a length of between 1 and 4 mm, preferably about 1 to 2 mm.
  • the remaining water content is added during the addition of the comminuted lignocellulose-containing material.
  • a preservative, preferably sorbic acid with a proportion of 0.3 to 1.5% by weight, preferably 0.5% by weight, is added to the mixture for preservation.
  • a fat wax emulsified in water is also added to the mixture, which makes the base material hydrophobic and keeps the straw and cellulose fibers elastic.
  • the batch When molding under pressure on one mold part and applying vacuum to the other mold part, the batch is dehumidified to around 25% of the amount of water originally added.
  • the molded part is then removed from the mold and driven into a drying oven, where it is heated at about 150 ° C. for about 1 hour and then at 100 ° C. for another 5 to 6 hours.
  • the shaped body shaped in this way is preferably provided with a surface coating made of rubber, in which the shaped body is moved into a rubber immersion bath and is immersed there briefly (about 5 to 10 seconds). After the immersion bath, the molded body is moved into a drying tunnel and there is again dried in an air stream with a heat of approximately 150 ° C.
  • the rubber layer preferably has a layer thickness which is between 0.03 and 0.4 mm, more preferably in the range of 0.1 mm.
  • a mixture of natural rubber and synthetic rubber has proven itself for the rubber layer, the surface layer formed comprising natural rubber and synthetic rubber in approximately equal parts.
  • the rubber immersion bath is preferably made up with 40% water, 28% by weight synthetic latex and 32% by weight natural rubber.
  • the synthetic latex can be, for example, the product VL 10329 from Synthomer-Chemie AG, which contains 57.7% dry matter. has, while the natural rubber contains 50% dry matter, so that approximately equal parts of the dry matter are formed.
  • the properties of moldings can be varied within further limits. It is primarily a question of additionally strengthening the surfaces of the moldings, on the other hand, however, it may also be necessary to hydrophobize the surfaces, so that the moldings can withstand a moist environment for a long time.
  • the surface impregnation used should consist of substances which, like the actual molded body itself, are environmentally friendly and biodegradable.
  • an impregnation suspension based on paper pulp and starch is preferably used for the surface impregnation, which is obtained by briefly boiling the paper pulp with raw starch in an aqueous suspension.
  • Dry pulped waste paper is preferably used as the paper pulp, which is boiled together with the starch and water.
  • Such an impregnation suspension can be applied to the moldings by spraying, brushing or dipping.
  • the moldings should be in a state in whose surface has not yet become too horny or encrusted due to drying.
  • the drying process of the shaped bodies is therefore preferably interrupted in order to apply the impregnation suspension to the body which has not yet fully dried and then to dry it with the coating.
  • a surface treatment with an impregnation suspension made of paper pulp and starch not only increases the abrasion resistance of the moldings but also their resistance to breakage.
  • the ratio of starch to paper pulp in the impregnation suspension can be between 10: 1 and 10:10, preferably between 4:10 and 6:10.
  • a wax can be added to the impregnation suspension, a mineral wax preferably being used.
  • the ratio of wax to paper pulp in the impregnation suspension can be between 5:10 and 10:10, a ratio of 9:10 to 10:10 is preferably used.
  • a water-soluble silicate Essentially soda water glass and potash water glass come into question, but potash water glass is preferable for environmental reasons. If impregnation is carried out exclusively with such a silicate, the commercially available products, such as sodium water glass 30/40 or potassium water glass 28/30 from Henkel KGaA, must be diluted with water before use. The degree of dilution depends on which surface properties are to be achieved. Depending on the dilution, the silicate solution penetrates more or less into the molded body or remains more strongly on the surface.
  • Potassium water glass in a dilution ratio of 1: 3 with water has proven itself to improve the abrasion resistance while maintaining the elasticity of the surface of the shaped body; a 50% water glass solution is more suitable for simultaneously improving the shock resistance and torsional strength of the shaped bodies.
  • the heat resistance and flame resistance of the moldings are additionally achieved or improved.
  • the surface impregnation described with paper fiber and starch and any additional components can also be used with advantage for moldings not produced according to the invention.
  • the production of a shaped body according to claim 1 is explained in more detail below using an exemplary embodiment.
  • the shaped bodies of the exemplary embodiment are securing collars for the transport of earthenware vessels, which were produced in a pilot plant test.
  • FIG. 1 shows a shaped body in a top view, and in
  • Fig. 2 is a section along the line AA of Fig. 1 is shown.
  • Cereal straw was used as the lignocellulose-containing material, which was chopped dry to a cutting length of 2 mm using a hammer mill.
  • Waste paper was used as fiber material, which was dry-fiberized with the same hammer mill with a sieve insert of 5 mm perforation to a bulk density of 26 kg / m 3 .
  • the shredded straw and the shredded paper were then put into a double-stage permanent ploughshare mixer together with dry, pourable raw starch and water and mixed at 1500 rpm.
  • a ratio of straw to paper fiber of 65:35 percent by weight was set, the ratio of water to solids was 12: 1, and starch was added in an amount such that, after the water had been sucked off in the molded part, an amount of 10% by weight was obtained on the weight of straw and paper remained.
  • the suspension formed during this mixing process was then transported by means of a slurry pump into a workplace silo equipped with an agitator. From this, a predetermined amount of the suspension was tapped off by a metering device and poured into a lower mold formed as a sieve shape. During the filling process, a vacuum was applied to the lower part of the mold in order to bring about an even distribution of the suspension in the mold and at the same time to suck off most of the water in the suspension. Immediately after the filling process had ended, the upper mold part was lowered onto the lower mold part and placed on the suspension with pressure, the vacuum of the lower mold part being switched off and applied to the upper mold part at the same time.
  • the upper mold part was raised and compressed air was applied to the lower mold part, so that the molded part was lifted out of the lower mold half.
  • the shaped body held by the vacuum on the upper part of the mold was then transported to the feed to a spiral belt drying oven and deposited there by switching off the vacuum.
  • the demolded part was briefly heated in this drying oven with an inlet temperature of 200 ° C. to a core temperature of 95 ° C. As a result of this heating, the starch remaining in the molded part was gelatinized with the residual water around the raw materials straw and waste paper.
  • the molded part then reached a position in which cold air was fed to the system, and was dried out there over a period of approximately 8 hours at a drying temperature of approximately 118 ° C.
  • Some molded parts were subjected to an additional surface refinement in the form of coloring and surface sealing. For this purpose, after a drying time of about 7 hours, they were briefly led out of the oven system via a deflection device, and a silicate paint bound in potash water glass was sprayed on. Drying of the ink suspension started immediately due to the intrinsic temperature of the molded part, and in a second operation a previously liquefied mineral wax was sprayed onto the dried surface of the molded body.
  • the molded parts were then moved back into the dryer system via deflection devices and finally dried in a further drying time of approx. 1 hour at a drying temperature of approx. 118 ° C., the mineral wax penetrating into the color application of the molded part.
  • the bending tensile strength and the compressive strength depend on the amount of the strength used.
  • the amount of starch to be used is thus determined according to the requirements for the physical properties of the molded body to be produced.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Forests & Forestry (AREA)
  • Environmental Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

Un produit moulé fabriqué à partir de matières premières végétales et entièrement biodégradable est constitué d'un produit végétal cellulosique contenant un mélange solide a) d'un produit broyé contenant de la lignocellulose et, b) d'une pâte à papier brute ainsi qu'une proportion de 3 à 15 % en poids d'amidon servant de liant ou une proportion de 3 à 15 % en poids d'une cire grasse. Les produits moulés ainsi fabriqués peuvent être employés comme éléments, de préférence comme produit d'emballage.
EP95911200A 1994-03-01 1995-03-01 Produit moule en materiau cellulosique et vegetal et procede pour sa fabrication Withdrawn EP0748358A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19944406639 DE4406639A1 (de) 1994-03-01 1994-03-01 Verfahren zum Herstellen von Formkörpern aus cellulosehaltigem, pflanzlichem Material und deren Verwendung
DE4406639 1994-03-01
PCT/DE1995/000261 WO1995023831A1 (fr) 1994-03-01 1995-03-01 Produit moule en materiau cellulosique et vegetal et procede pour sa fabrication

Publications (1)

Publication Number Publication Date
EP0748358A1 true EP0748358A1 (fr) 1996-12-18

Family

ID=6511506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95911200A Withdrawn EP0748358A1 (fr) 1994-03-01 1995-03-01 Produit moule en materiau cellulosique et vegetal et procede pour sa fabrication

Country Status (4)

Country Link
EP (1) EP0748358A1 (fr)
AU (1) AU1888895A (fr)
DE (2) DE4406639A1 (fr)
WO (1) WO1995023831A1 (fr)

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DE4424419A1 (de) * 1994-07-12 1996-01-18 Naturalis Ag Verfahren zum Herstellen von kompostierbaren Formkörpern aus vorwiegend pflanzlichen Rohstoffen und Komponentengemisch hierfür
DE19618554A1 (de) * 1996-05-09 1997-11-27 Lothar Ruehland Formteil bestehend aus Strohfasern, Papierfasern und einem Bindemittel sowie Verfahren zur Herstellung eines derartigen Formteils
DE19637112C2 (de) * 1996-09-12 1999-11-18 Matthias Kleespies Verfahren zur Herstellung fester Körper und Verwendung derartiger Körper
DE19715310A1 (de) * 1997-04-02 1998-10-08 Kschiwan Marlis Dämmende Baustoffmasse
DE19811805A1 (de) * 1998-03-18 1999-09-23 Mbr Agrar Service Taunus Weste Dämmelemente aus pflanzlichen Materialien
DE19855283B4 (de) * 1998-11-24 2005-12-29 Flora-Naturprodukte & Technologiesysteme Gmbh Verfahren zur Herstellung von Formkörpern
ES2320953B1 (es) * 2007-01-16 2010-03-15 Contrerina, S.L. Procedimiento de obtencion de pasta biodegradable y producto asi obtenido.
PL2862815T3 (pl) * 2013-10-15 2017-09-29 Huhtamaki Molded Fiber Technology B.V. Sposób wytwarzania formowanego opakowania włóknistego oraz formowane opakowanie włókniste na żywność
FR3062811B1 (fr) * 2017-02-14 2022-07-08 Francois Ruffenach Procede de fabrication d’un element hydrophobe et son utilisation
CN110545973A (zh) * 2017-02-14 2019-12-06 切洛公司 用于制造疏水性元件的方法及其用途

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FR944633A (fr) * 1945-05-18 1949-04-11 Jicwood Ltd Composition destinée à être employée dans les travaux de construction et procédé pour sa fabrication
DE1060179B (de) * 1957-09-23 1959-06-25 Karl Wilhelm Funk Unterlagen fuer Ansteckblumen
DE3616885C3 (de) * 1986-05-20 1996-06-20 Peter Grohmann Verfahren zur Herstellung umweltfreundlicher und leichter Formkörper
DE3813984A1 (de) * 1988-04-26 1989-11-09 Degenhard Urbahn Verfahren zur herstellung von formgepressten, stossdaempfenden teilen
DE4020969C1 (en) * 1989-10-05 1991-07-18 Mayer, Frank, Prof. Dr., 3400 Goettingen, De Moulding with improved mechanical properties and density - comprises mixt. of wood or cellulose material shavings and potato pulp, waste paper and binder
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Title
See references of WO9523831A1 *

Also Published As

Publication number Publication date
DE19580081D2 (de) 1997-12-11
AU1888895A (en) 1995-09-18
WO1995023831A1 (fr) 1995-09-08
DE4406639A1 (de) 1995-09-21

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