EP4377383A1 - Matériau composite thermoplastique - Google Patents

Matériau composite thermoplastique

Info

Publication number
EP4377383A1
EP4377383A1 EP22751102.9A EP22751102A EP4377383A1 EP 4377383 A1 EP4377383 A1 EP 4377383A1 EP 22751102 A EP22751102 A EP 22751102A EP 4377383 A1 EP4377383 A1 EP 4377383A1
Authority
EP
European Patent Office
Prior art keywords
composite material
weight
organic fiber
recycled
thermoplastic
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.)
Pending
Application number
EP22751102.9A
Other languages
German (de)
English (en)
Inventor
Ewald Wilka
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.)
Nabore GmbH
Original Assignee
Nabore 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 Nabore GmbH filed Critical Nabore GmbH
Publication of EP4377383A1 publication Critical patent/EP4377383A1/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/045—Reinforcing macromolecular compounds with loose or coherent fibrous material with vegetable or animal fibrous material
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B1/00—Footwear characterised by the material
    • A43B1/0063—Footwear characterised by the material made at least partially of material that can be recycled
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/04—Plastics, rubber or vulcanised fibre
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/06—Leather
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/02—Uppers; Boot legs
    • A43B23/0205—Uppers; Boot legs characterised by the material
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/02—Uppers; Boot legs
    • A43B23/0205—Uppers; Boot legs characterised by the material
    • A43B23/021—Leather
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical

Definitions

  • the present invention relates to a thermoplastic composite material containing at least one organic, preferably used and/or recycled fiber material and at least one thermoplastic binder.
  • the invention relates to a method for producing a thermoplastic composite material and a use of the thermoplastic composite material.
  • Thermoplastic composite materials are known in the prior art.
  • Animal raw material for example, serves as the starting material for the production of these composite materials.
  • the composite materials known in the prior art often have a certain rigidity or inflexibility and low elasticity.
  • a composite material according to the invention comprises a) at least one organic fiber material or a mixture of two or more organic fiber materials, wherein the organic fiber material or the mixture of two or more organic fiber materials preferably comprises at least one used and/or recycled fiber material, and wherein the organic fiber material or the mixture of two or more organic fiber materials has a proportion of at least 20% by weight, preferably of at least 40% by weight, particularly preferably at least 50% by weight, particularly at least 60% by weight, particularly preferably at least 75% by weight, and/or at most 90% by weight, particularly at most 80 wt or mixtures of two or more of the groups mentioned, preferably from the group of styrene acrylate and/or styrene but adiene, particularly preferably from the group of styrene acrylate, and the binder preferably has a proportion of at least 10% by weight, particularly preferably at least 20% by weight, in particular at least 30% by weight, and/or preferably of at most 50% by weight, in particular at most 40%
  • composite material or “composite material” means a composite material or composite material (composite or compound for short) or a material made of two or more connected materials, which is also referred to here as a multiphase or mixed material and consists of at least two main components : from the fibers reinforcing the composite material and a thermoplastic binder which embeds the fibers as a filler and/or adhesive. Due to mutual interactions of the two components, the overall material can advantageously form higher-quality properties than each of the two components involved themselves.
  • a composite material can, for example, consist of a sheet-like structure made of fibers and Binders be produced fiber material. These are often fibers that are connected together with the binders.
  • the composite material has different material properties than its individual components. Material properties of the components are essentially important for the properties of the composite material.
  • any fiber material that gives the composite material the desired properties, such as a specific feel or look, is suitable as the organic fiber material.
  • organic fibrous material refers to a fibrous material, i. H. a linear, elementary structure that consists of a fibrous material and the at least outer fiber shape of which essentially has a longitudinal shape and which comprises at least one organic component.
  • a fibrous material i. H. a linear, elementary structure that consists of a fibrous material and the at least outer fiber shape of which essentially has a longitudinal shape and which comprises at least one organic component.
  • a treatment step for conversion into a fibrous structure can also be preferred.
  • both animal and vegetable organic fiber materials are in principle suitable for this. However, animal fiber material is preferred.
  • Suitable animal fibers include natural fibers such as leather, wool, hair or silk.
  • Plant fibers can contain, for example, cotton, kapok, flax, hemp, jute, kenaf, ramie, broom, manila, coconut or sisal.
  • the composite material contains at least one organic fiber material or a mixture of two or more organic fiber materials, the organic fiber material or the mixture of two or more organic fiber materials preferably having a proportion of at least 20% by weight, preferably at least 40% by weight. , particularly preferably at least 50% by weight, in particular at least 60% by weight, particularly preferably at least 75% by weight, and/or at most 90% by weight, in particular at most 80% by weight, has in the composite material.
  • a composite material preferably comprises at least one used and/or recycled organic fiber material or a mixture of two or more used and/or recycled organic fiber materials.
  • the term “used” stands for "used” or “no longer unused” or “second-hand”.
  • Such used material can also include waste material and/or possibly show signs of wear and tear and can, but does not necessarily have to, be functional.
  • the used fiber material may have already been put to normal use by the manufacturer, seller or a third party and may have a material defect. It can also be about rejected goods or leftover goods that should not be sold in this way. This can also be goods that occur, for example, as waste from a production process.
  • the used material is preferably a fibrous material, in particular an animal fibrous material, which is obtained from a production process.
  • waste means that a raw material is reused, reused or remanufactured.
  • waste can be classified as waste. This means that waste is processed through various recovery processes into products, materials or substances, either for the original purpose or for other purposes. Irrespective of their original purpose, the products, materials or substances are used here for the purpose of producing a thermoplastic composite material according to the invention.
  • thermoplastic composite material achieves improved elasticity of the thermoplastic composite material.
  • improved elasticity of the composite material it can advantageously be deformed three-dimensionally better or more easily.
  • waste material can include, for example, punching waste, which accumulates after the punching of leather in the form of punched grid waste.
  • any used and/or recycled fiber material in particular any used and/or recycled animal fiber material that is obtained from a production process, is suitable.
  • the used and/or recycled leather fibers can be of any type Leather residues are obtained, such as chrome-tanned, vegetable-tanned and / or aldehyde-tanned leather or their precursors such.
  • Types of leather that can be replaced within the scope of the present invention are, for example, upper leather, suede leather, crust leather, lower leather, lining leather, bare leather and technical leather.
  • the leather is leather with at least one color component or a preferably superficial color layer.
  • Such a used and/or recycled fiber material preferably has a thickness of at least 0.8 mm. Such a fiber material is at most 3 mm thick.
  • the term “thickness” is to be understood as meaning the thickness of the leather material including any additional layers.
  • a fiber material is particularly preferably coated with a paint, such as a paint, with the paint or paint coating preferably having a layer thickness of at least 0.03 mm and at most 0.1 mm.
  • a preferred used and/or recycled organic fibrous material is substantially free of contaminants such as metals, heavy metals or material such as nonwoven or woven fabric.
  • the term “essentially free” is used to mean an impurity of no more than 2% by weight, preferably no more than 1% by weight, in particular no more than 0.5% by weight The proportion mentioned identifies each individual contamination separately.
  • thermoplastic composite material according to the invention comprises at least one thermoplastic binder, which forms the matrix of the thermoplastic composite material and is preferably selected from a heteropolymer, also referred to here as a copolymer.
  • the heteropolymer or copolymer can be in the form of a terpolymer.
  • the term “heteropolymer” or “copolymer” is to be understood as meaning a polymer which is composed of two or more different types of monomer units.
  • the different monomer units can be similar.
  • copolymers can be divided into different classes: random copolymers, in which the distribution of the two monomers in the chain is random; gradient copolymers, which are similar in principle to random copolymers, but in which the proportion of one monomer increases along the chain and the proportion and of the other monomer decreases; alternating copolymers in which the two monomers alternate; Block copolymers and segmented copolymers, which consist of longer sequences or blocks of each monomer (depending on the number of blocks one also speaks of diblock copolymer, triblock copolymer, etc.); Graft copolymers in which blocks of one monomer are grafted onto the backbone (backbone) of another monomer.
  • Copolymers made up of three different monomers are called terpolymers. This group of copolymers can also be divided into the classes listed above.
  • thermoplastic binder is selected from the group of polyurethanes, polyolefins, polyvinyl esters, polyesters, polyamides, polystyrenes, styrene olefins, polyacrylates, vinyl acetates, ethylene vinyl acetates or mixtures of two or more of the groups mentioned.
  • the copolymer is preferably made from a styrene-acrylate copolymer (syn. styrene-acrylate) and/or from a styrene-butadiene copolymer (syn. styrene-butadiene, styrene-butadiene rubber: SBR; engl. styrene-butadiene rubber ) selected.
  • the copolymer is particularly preferably selected from a styrene-acrylate copolymer.
  • Acrylates are obtained by homo- or co-polymerization of (meth)acrylic acid esters.
  • Styrene (syn. vinylbenzene, according to the IUPAC nomenclature phenylethene) is an unsaturated, aromatic hydrocarbon and can be obtained by homo- or co-polymerization of vinylbenzene or phenylethene.
  • a suitable styrene-acrylate copolymer can be obtained, for example, under the name Acronal 2412 from BASF (Ludwigshafen, Germany).
  • Styrene-butadiene is a copolymer of 1,3-butadiene and styrene and is the most widely produced variety of synthetic rubber.
  • the term "thermoplastic binder” stands for the total proportion of the thermoplastic binder, regardless of how many components it consists of and how many different preparations it comprises.
  • the present invention includes a method for producing a composite material with the following steps: i) providing an organic fiber material or a mixture of two or more organic fiber materials, ii) defibering the organic fiber material or the mixture of two or more organic fiber materials, iii) Addition of a thermoplastic binder to obtain a dispersion, the thermoplastic binder being selected from the group consisting of polyurethanes, polyolefins, polyvinyl esters, polyesters, polystyrenes, styrene olefins, polyacrylates, vinyl acetates, ethylene vinyl acetates or mixtures of two or more of the groups mentioned is preferably from the group of styrene acrylate and/or styrene butadiene, particularly preferably from the group of styrene acrylate, iv) optionally adding an aqueous solution of an aluminum and/or a copper salt to the dispersion from step iii), v) optionally,
  • an organic fiber material or a mixture of two or more organic fiber materials can be provided by procuring it as a correspondingly manufactured material or by making it yourself.
  • the organic fiber material is preferably selected from a used and/or recycled material.
  • both animal and vegetable fiber materials can be used in the process according to the invention.
  • a preferred method uses animal fiber material.
  • fiber material that already includes binders and originates from a (possibly separate) production process can also be used in particular.
  • such used and/or recycled animal fiber material contains wax.
  • the wax content in a used and/or recycled animal fiber material is particularly preferably at least about 8% by weight to at least about 9% by weight, in particular about 10% by weight to about 12% by weight, in particular preferably at about 13% to about 15% by weight.
  • a used and/or recycled material can have a film coating, which is preferably polyurethane.
  • the thickness of such a preferred polyurethane film is in particular at least about 0.05 mm and/or at most 0.1 mm.
  • a preferred used and/or recycled animal fiber material can have an impregnation.
  • a further preferred used and/or recycled animal fiber material can have undergone mechanical processing steps such as ironing or embossing, with an embossed film in particular comprising polyurethane.
  • the organic fiber material can preferably be comminuted before the defibration.
  • a comminution of leather waste for example, can preferably be carried out in so-called cutting blade mills.
  • Such comminution preferably takes place over an area of no more than 1 cm 2 .
  • the organic fiber material is then defibrated.
  • defibering can be done either dry or wet depending on the desired product.
  • the defibration is preferably carried out wet.
  • the preferably comminuted fiber material is mixed with water (4 to 6% by weight fibers, 94 to 96% by weight water) and defibrated.
  • water 4 to 6% by weight fibers, 94 to 96% by weight water
  • wet defibration makes it possible to obtain a homogeneous and soft composite material.
  • the fiberized material is then soaked in an aqueous solution or liquid, for example in a ratio of 1 to 3% by weight fiber material and 97 to 99% by weight water. It is also advantageous that the softness or strength of the composite material can be adjusted individually. This depends on the mixing ratio between the dry and possibly wet fiber material. For example, the use of 100% dry fiber material advantageously gives a very soft product which can be used for handbag, shoe or clothing material, but also in the automotive industry. On the other hand, the use of 100% wet fiber material results in a very strong product, which is used, for example, for shoe soles, inside walls of bags, wall coverings.
  • the at least one thermoplastic binder is added (according to step iii above) to the organic fiber material.
  • the thermoplastic binder can be added to the organic fiber material in the form of a cationic polymer or an anionic polymer.
  • the thermoplastic binder is added as an anionic polymer to the organic fiber material.
  • An aqueous solution of inorganic aluminum and/or copper salt can then optionally be added to the mixture or dispersion.
  • Aluminum sulfate is preferably used for this.
  • an organic acid such as formic acid or acetic acid can be used.
  • the inorganic salts are used to precipitate the binder.
  • most of the metal salt is removed from the composite material with the aqueous phase, but a small amount can remain in the composite material.
  • no metal salts remain in the material or waste water when using organic acids.
  • the mixture can be dewatered and dried.
  • the amounts of the organic, preferably animal, fiber material or the binder are provided in such a way that, after the production of the composite material according to the invention, they preferably result in a proportion as already explained above.
  • the composite material can optionally be laminated with a film or the like in a next step.
  • Products made with such lamination such as surfaces with a leather look, can be used for handbags, belts, Shoes and the like are used.
  • the present invention relates to a composite material, the composite material being obtainable by the production method described above.
  • the present invention relates to the use of the composite material according to the invention, preferably for profile wrapping of wall, floor and ceiling panels, for surface coating of furniture fronts with or without inner radii, for edge gluing, in particular for surface coating of parts in the interior of motor-driven motor vehicles, for the production of aircraft wings, in particular for the production of textiles for clothing, shoes and bags.
  • the soft composite material whose production process has already been explained, is used for the production of textiles for clothing, shoes and bags, for example.
  • the composite material according to the invention can be subjected to changes in shape, for example moldings with precise contours, which remain dimensionally stable after the temperature has fallen below the thermal deformation temperature.
  • the present invention also relates to a method for the surface coating of an object, wherein a thermoplastic composite material according to the invention and an object are heated to a temperature above the yield point of the thermoplastic composite material, the thermoplastic composite material is applied to the object, and the object and the thermoplastic composite material subsequently cooled to a temperature below the yield point of the thermoplastic composite material.
  • the soft product which is characterized by its elasticity according to the invention, can thus be easily pulled over three-dimensional surfaces and can, for example, be molded in and out with precise contours, which remain dimensionally stable by being bonded to a carrier.
  • a composite material improved according to the invention can simply be used as a decorative strip surface or in the form of various applications on various carrier materials are applied, whereby a very lively look or an individual design of the interior of motor-driven motor vehicles can be obtained.
  • the composite material can also be bonded to a lining material and/or outer material such as a nonwoven fabric.
  • a lining material and/or outer material such as a nonwoven fabric.
  • a preferred composite material contains organic, preferably used and/or recycled, fiber material. This is all the more true if this occurs as a residue in a production process, such as in the form of (finished) leather punching waste.
  • the proportion of organic fibers in the thermoplastic composite material is at least 60% by weight and/or at most 80% by weight.
  • a preferred composite material comprises organic fiber material which contains used and/or recycled leather fibers and/or plant fibers, preferably made from used and/or recycled leather fibers.
  • the organic fiber material is chopped to a stretched length of generally about 0.1 to 20 mm.
  • the fiber length is preferably at least about 0.5 mm, particularly preferably about 1 mm, in particular about 3 mm.
  • a preferred fiber length is at most up to about 20 mm, particularly preferably up to about 10 mm, in particular up to about 10 mm 8mm
  • the fiber length is measured in the stretched state of the fiber; Depending on the starting material and the type of comminution, it can happen that the fiber assumes an irregular shape, for example a curved shape, without external influence.
  • Fiber materials can also be used to produce the composite material.
  • Suitable plastic fibers can be selected from polymers such as cupro, viscose, modal, acetate, triacetate or alginate fibers and protein fibers or mixtures of two or more of the fibers mentioned.
  • suitable synthetic polymer fibers polyacrylic, polymethacrylic, polyvinyl chloride, fluorine-containing polymer fibers, polyethylene, polypropylene, vinyl acetate, polyacrylonitrile, polyamide, polyester or polyurethane fibers can be mentioned.
  • Recycled cloth fibers can be obtained, for example, from felt cloth, cork cloth, canvas cloth, paper cloth, velvet cloth, jersey cloth, leather cloth and/or denim and the like.
  • Recycled fabric fibers which are produced in textile production, for example denim, are particularly advantageous here.
  • the composite material comprises at least one binder which is selected from a natural and/or synthetic latex, preferably from a natural latex.
  • Natural and/or synthetic latex is a material created by foaming natural or synthetic rubber.
  • Natural rubber colloquially also called caoutchouc
  • rubber elasticum or resina elastica is also known as rubber elasticum or resina elastica and is a rubber-like substance in the milky sap of rubber plants. Crude oil in particular is used as a raw material for synthetically produced rubber.
  • a preferred method for producing such a composite material therefore takes into account the addition of a natural and/or synthetic latex, preferably the addition of a natural latex, in addition to the steps already mentioned above.
  • the binder can include other components, which can also be selected from biopolymers, for example.
  • biopolymer is understood to mean a polymer which is essentially of biological origin and whose proportion of synthetic components is no more than 20% by weight, preferably no more than 10% by weight.
  • biopolymer does not exclude that the biopolymer can also go through processes for its preparation and purification.
  • the thermoplastic binder preferably contains at least one polymer which has a minimum film forming temperature (MFT) of at most 30°C, preferably at most 0°C.
  • MFT minimum film forming temperature
  • the minimum film-forming temperature is the lowest temperature at which a thin layer of a polymer dispersion still dries to form a coherent film. It is close to the glass transition temperature T g of the polymer and, with film formation, determines one of the most important performance properties of a polymer dispersion.
  • a method for determining the minimum film-forming temperature is known to those skilled in the art and can be carried out according to DIN 53787, for example.
  • a preferred embodiment includes a binder selected from a styrene acrylate copolymer.
  • a styrene-acrylate copolymer preferably has an acrylate fraction of more than 50% by weight; the styrene-acrylate copolymer particularly preferably comprises an acrylate fraction of at least 60% by weight.
  • the proportion of styrene in the copolymer is at most 40% by weight, particularly preferably at most 30% by weight.
  • the acrylate component or the acrylate polymer can use homopolymers or copolymers which, in addition to acrylic acid esters (acrylates), contain, for example, acrylonitrile, vinyl acetate, vinyl propionate, vinyl chloride and/or vinylidene chloride.
  • Preferred monomers for the production of the acrylate polymer are selected from methacrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, tert-butyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate and/or lauryl acrylate. If appropriate, further monomers such as acrylic acid, methacrylic acid, acrylamide and/or methacrylamide can also be added during the polymerization.
  • the acrylate component can also comprise acrylates and/or methacrylates with one or more functional groups, such as maleic acid, itaconic acid, butanediol diacrylate, hexanediol diacrylate, triethylene glycol diacrylate,
  • propylene glycol methacrylate butanediol monoacrylate, ethyl diglycol acrylate, and 2-acrylamido-2-methylpropanesulfonic acid.
  • a preferred composite material may comprise a styrene-butadiene copolymer.
  • the proportion of the styrene-acrylate copolymer or a styrene-butadiene copolymer in the thermoplastic composite material is preferably at least 10% by weight and/or at most 50% by weight.
  • the thermoplasticity temperature of the composite material can preferably be reduced by an advantageous polymer, preferably by a styrene-acrylate copolymer or a styrene-butadiene copolymer, to a deformation temperature of about 50.degree. C. to at most about 80.degree. C., particularly preferably to about 65.degree , in particular to about 50 ° C, can be reduced, whereby the energy consumption for a thermal deformation can be significantly reduced.
  • a thermal deformation can include in particular the process of deep drawing.
  • a more preferred composite material can contain up to 20% by weight of one or more components from the group consisting of inorganic salts, cationic polymers, preservatives, dyes, natural and/or synthetic fats, paraffins, natural and/or synthetic oils, silicone oils, ionic and/or contain nonionic surfactants.
  • thermoformable components such as thermoformable shoe components such as heel caps and/or toe caps, casing of objects, such as casing of boxes, perfume containers and the like, leather linings of containers and caskets etc. are used.
  • the advantageous Composite material a thermally activatable adhesive, preferably a hot melt adhesive.
  • a thermally activatable adhesive or preferred hot-melt adhesive forms a firm connection with the organic fiber material and is permanently bonded to it over the entire surface .
  • the adhesive hardens as a result of subsequent cooling and remains firmly bonded to the organic fiber material even under high mechanical stress.
  • hot melt adhesive also called hot melt adhesive, hot melt or hot glue
  • hot melt adhesive is understood to mean a generally solvent-free substance that is more or less solid at room temperature, which liquefies when heated at its melting point and when it cools down a solid compound, in the present case Case with the organic fibers and optionally other substances that are in the advantageous composite material forms.
  • This group of adhesives is based on different chemical raw materials.
  • the melting temperature of such a hot-melt adhesive is preferably within the thermal deformation temperature of the composite material.
  • the thermally activatable adhesive or the preferred hot-melt adhesive can be the binder itself, i. H. the natural latex and possibly other optional binders.
  • the thermally activatable adhesive or the hot-melt adhesive can also be selected from a different substance.
  • Such an alternative substance can be selected, for example, from the group of polyamide, polyethylene, polyalphaolefin, ethylene vinyl acetate copolymers, polyester elastomers, copolyamide elastomers, vinyl pyrrolidone/vinyl acetate copolymers and the like.
  • the used and/or recycled finished leather leftovers that come from a production process can be pre-sorted, if necessary, in order to obtain a pure fiber material.
  • finished leather residues such as leather punching waste
  • knife mills mills with rotating and static knives.
  • a sieve with 1 cm 2 perforation is used for this purpose, which is inserted in the cutting blade mill and only ejects fibers that are smaller than 10 mm.
  • the fibers are then admixed with 4% by weight water and 96% by weight wet and defibrated using disc refiners (eg Asplund disc refiner, Valmet, Darmstadt, Germany).
  • disc refiners eg Asplund disc refiner, Valmet, Darmstadt, Germany.
  • a natural latex can be added.
  • the pulp obtained in this way is then dewatered with a fourdrinier machine (Corsini), dried in a drying tunnel (Dornier) with the supply of warm air, calendered in a rolling mill (e.g. Aletti, Varese), ground and further refined.
  • the refinement can be done, for example, by embossing on the surface and finishing with color.
  • used and/or recycled finished leather residues are comminuted in knife mills to a fiber length of less than 10 mm (see example 1).
  • the fibers are then admixed with 6% by weight water and 94% by weight wet and defibrated using disc refiners (eg Asplund disc refiner, Valmet, Darmstadt, Germany).
  • disc refiners eg Asplund disc refiner, Valmet, Darmstadt, Germany.
  • a natural latex can optionally be added
  • the pulp obtained in this way is then dewatered with a fourdrinier machine (Corsini), dried in a drying tunnel (Dornier) with the supply of warm air, calendered in a rolling mill (e.g. Aletti, Varese), ground and further refined.
  • the refinement can be done, for example, by embossing on the surface and finishing with color.
  • used and/or recycled finished leather residues are comminuted in knife mills to a fiber length of less than 10 mm (see example 1).
  • the fibers are then mixed with 5% by weight water at 95% by weight and wet defibrated using disc refiners (eg Asplund disc refiner, Valmet, Darmstadt, Germany).
  • a biopolymer can optionally be added.
  • the pulp obtained in this way is then dewatered with a fourdrinier machine (Corsini), dried in a drying tunnel (Dornier) with the supply of warm air, calendered in a rolling mill (e.g. Aletti, Varese), ground and further refined.
  • the refinement can be done, for example, by embossing on the surface and finishing with color.
  • used and/or recycled finished leather residues and recycled denim fabric are comminuted in knife mills to a fiber length of less than 10 mm (see example 1).
  • the fibers are then admixed with 6% by weight water and 94% by weight wet and defibrated using disc refiners (eg Asplund disc refiner, Valmet, Darmstadt, Germany).
  • disc refiners eg Asplund disc refiner, Valmet, Darmstadt, Germany.
  • a binder 10,000 liters of pulp with 2% by weight fiber contain 200 kg of fibers; 5-30% by weight of binder (dry) are added to these 200 kg and this is coagulated with a cationic product (e.g. aluminum sulphate solution from Ecolochem, 7-10%, pH ⁇ 7) and the fibers are thus precipitated .
  • a cationic product e.g. aluminum sulphate solution from Ecolochem, 7-10%, pH ⁇ 7
  • a natural latex can optionally be added.
  • the pulp obtained in this way is then dewatered with a fourdrinier machine (Corsini), dried in a drying tunnel (Dornier) with the supply of warm air, calendered in a rolling mill (e.g. Aletti, Varese), ground and further refined.
  • the refinement can be done, for example, by embossing on the surface and finishing with color.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Zoology (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne un matériau composite thermoplastique contenant au moins un matériau fibreux organique, de préférence usé et/ou recyclé, et au moins un liant thermoplastique. L'invention concerne en outre un procédé de fabrication d'un matériau composite thermoplastique et une utilisation du matériau composite thermoplastique.
EP22751102.9A 2021-07-29 2022-07-19 Matériau composite thermoplastique Pending EP4377383A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021119799.6A DE102021119799A1 (de) 2021-07-29 2021-07-29 Thermoplastisches Verbundmaterial
PCT/EP2022/070239 WO2023006520A1 (fr) 2021-07-29 2022-07-19 Matériau composite thermoplastique

Publications (1)

Publication Number Publication Date
EP4377383A1 true EP4377383A1 (fr) 2024-06-05

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EP22751102.9A Pending EP4377383A1 (fr) 2021-07-29 2022-07-19 Matériau composite thermoplastique

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EP (1) EP4377383A1 (fr)
DE (1) DE102021119799A1 (fr)
WO (1) WO2023006520A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6482875B2 (en) * 1997-05-02 2002-11-19 Dorus Klebetechnik Gmbh & Co. Kg Thermoplastic composite material
DE19921209A1 (de) * 1999-05-07 2000-11-16 Dorus Klebetechnik Gmbh & Co K Thermoplastisches Verbundmaterial
DE10336509A1 (de) * 2003-08-08 2005-03-03 Ledertech Gmbh Verbundmaterial für thermisch formbare Schuhkomponenten auf organischer Faserbasis
EP1948432A4 (fr) 2005-10-20 2012-01-25 Mallard Creek Polymers Inc Materiau en cuir composite
DE102019109954A1 (de) 2019-04-15 2020-10-15 S.M.B.-Equity GmbH Thermoplastisches Verbundmaterial

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DE102021119799A1 (de) 2023-02-02
WO2023006520A1 (fr) 2023-02-02

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