LAYER COMPOSITE FOR USE AS IMITATION LEATHER

Abstract

The invention relates to a layer composite for use as imitation leather, to a method for producing the layer composite and to the use of the thereof.

Claims

1: A layer composite for use as imitation leather, which has the following layers: a) a carrier layer, which contains textile material, b) a decorative layer, which contains or consists of plant leaf material, c) a cover layer, which contains a plastic, wax or protein material or a mixture thereof, wherein the decorative layer is arranged between the textile carrier layer and the cover layer.

2: The layer composite according to claim 1, wherein the carrier layer contains a nonwoven fabric, and/or a woven fabric.

3: The layer composite according to claim 1, wherein the plant leaf material of the decorative layer is finely ground tobacco and/or tobacco powder and/or tobacco offcuts.

4: The layer composite according to claim 1, wherein the cover layer contains a plastic material, which is selected from the group consisting of polypropylene (PP), polyethylene (PE), polyvinyl butyral (PVB), polyamide (PA), polyester, polyurethane (PU), polyethylene oxides, polyphenylene oxides, thermoplastic polyurethanes (TPU), polyurea, polyacetal, polyacrylate, poly(meth)acrylates, polyoxymethylene (POM), polyvinyl acetal, polystyrene (PS), acrylic butadiene styrene (ABS), acrylonitrile styrene acrylate (ASA), polysaccharides, polyethersulfones, polysulfonates, polytetrafluoroethylene (PTFE), polyurea, formaldehyde resins, melamine resins, polyetherketone, polyvinyl chloride, polylactide, polysiloxane, phenolic resins, epoxy resins, poly(imide), bismaleimidetriazine, thermoplastic polyurethane, ethylene-vinyl acetate (EVA), polylactide (PLA), polyhydroxybutyrate (PHB), copolymers and/or mixtures of the above-named polymers.

5: The layer composite according to claim 1, wherein the layer composite consists of a carrier layer made of flax nonwoven fabric or a woven fabric, a decorative layer made of the plant material tobacco and a cover layer made of a plastic, wax or protein material.

6: The layer composite according to claim 1, wherein the layer composite has one or more additional decorative layers, which are arranged between the carrier layer and the cover layer.

7: The layer composite according to claim 1, wherein the layer composite has one or more adhesive layers.

8: The layer composite according to claim 1, wherein the tensile strength and/or the bending tensile strength of one, several or all cover and/or carrier layers is greater than that of the at least one decorative layer.

9: A method for producing the layer composite according to claim 1, which has the following steps: A) applying a plant leaf material to a carrier layer or a cover layer, with the result that a decorative layer is formed, which preferably covers ≥90% of a flat side of the carrier layer or the cover layer, B) applying a cover layer made of a plastic, wax or protein material or a mixture of the above-named to the decorative layer, if the decorative layer was applied to a carrier layer in step A), or applying a carrier layer, if the decorative layer was applied to a cover layer in step A).

10: The method according to claim 9, wherein the method has the following additional method steps: C) dispersing the plant leaf material in an aqueous solvent or dispersant before it is applied to the carrier layer or cover layer, wherein the plant material is preferably tobacco, D) removing the aqueous solvent or dispersant from the dispersion after the dispersion has been applied to the carrier layer or cover layer, preferably at increased temperature and/or decreased pressure, with the result that the decorative layer is formed, optionally: E) needle-punching and/or gluing together at least two layers of the layer composite.

11: The method according to claim 9, wherein adhesive is applied to the plant leaf material and/or the carrier layer before the plant leaf material is applied to the textile carrier layer.

12: The method according to claim 9, wherein the layers of the composite are pressed together, wherein the pressing together is effected in a transfer press and/or using increased temperatures.

13: The method according to claim 9, wherein the aqueous solvent or dispersant contains a binder selected from the group consisting of polysaccharides, in particular agar-agar, chitosan, pectin and xanthan gum, natural and synthetic resins, gelatin, alginate, cellulose ether, modified starch, mucilage or mixtures of the above-named.

14: The method according to claim 9, wherein the aqueous solvent or dispersant contains an alcohol, preferably a polyvalent alcohol such as glycerol, glycol, polyethylene glycol or polyethylene oxide.

15: A method comprising incorporating the layer composite according to claim 1 in clothing or fashion accessories.

16: The layer composite according to claim 3, wherein the decorative layer further contains a binder based on a polysaccharide.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0156] FIG. 1: schematic sectional representation of the layer composite with carrier, adhesive, decorative, 2.sup.nd adhesive, 2.sup.nd decorative and cover layers,

[0157] FIG. 2: schematic sectional representation of the layer composite with carrier, adhesive, decorative, 2.sup.nd adhesive and cover layers,

[0158] FIG. 3: schematic sectional representation of the layer composite with carrier, adhesive, decorative and cover layers,

[0159] FIG. 4: schematic sectional representation of the layer composite with carrier, adhesive, decorative, 2.sup.nd adhesive, 2.sup.nd decorative and cover layers,

[0160] FIG. 5: laying pattern of the tobacco leaves of an example decorative layer.

LIST OF REFERENCE NUMBERS

[0161] 1 Carrier layer [0162] 2 Adhesive [0163] 3 Reconstituted tobacco [0164] 4 Adhesive substance layer [0165] 5 Tobacco [0166] 6 Adhesive layer [0167] 7 Cover layer

DETAILED DESCRIPTION OF THE FIGURES

[0168] FIG. 1 shows the layer structure of a layer composite according to the invention which has carrier, adhesive, decorative, 2.sup.nd adhesive, 2.sup.nd decorative and cover layers. The carrier layer 1 is joined to the decorative layer made of reconstituted tobacco 3 by the adhesive 2. The 2.sup.nd decorative layer 5 made of tobacco is joined to the decorative layer 3 and the cover layer 7 by the adhesive 4. The plant leaf material of the decorative layer 5 is joined together by adhesive.

[0169] FIG. 2 shows the layer structure of a layer composite according to the invention which has a carrier layer, adhesive, decorative layer, 2.sup.nd adhesive layer and cover layer. The carrier layer 1 is joined to the decorative layer 5 by the adhesive 2. The decorative layer 5 made of tobacco is joined to the decorative layer 3 and the cover layer 7 by the adhesive 4. The plant leaf material of the decorative layer 5 is joined together by adhesive.

[0170] FIG. 3 shows the layer structure of a layer composite according to the invention which has a carrier layer, adhesive layer, decorative layer and cover layer. The carrier layer 1 is joined to the decorative layer 5 by the adhesive 2. The decorative layer 5 made of tobacco is joined to the decorative layer 3 and the cover layer 7 by the adhesive 4. The plant leaf material of the decorative layer 5 is joined together by adhesive.

[0171] FIG. 4 shows the layer structure of a layer composite according to the invention, has carrier, adhesive, decorative, 2.sup.nd adhesive, 2.sup.nd decorative and cover layers. The carrier layer 1 is joined to the decorative layer made of reconstituted tobacco 3 by the adhesive 2. The 2.sup.nd decorative layer 5 made of tobacco is joined to the decorative layer 3 and the cover layer 7 by the adhesive 4. The plant leaf material of the decorative layer 5 is joined together by adhesive.

[0172] Possible laying patterns of the tobacco leaves are shown in FIGS. 5a and 5b. The laying pattern is to ensure that the carrier layer is 90%, particularly preferably completely, covered by leaf material on one of its flat sides.