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Artificial leather, its preparation method and its use

A technology of artificial leather and non-woven fabrics, applied in the field of artificial leather

Inactive Publication Date: 2006-10-04
CARL FREUDENBERG KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a high proportion of waste is generated in this process since only the separated membrane is used further

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] On a conventional three-head coating device, according to the blade coating method (Rakelverfahren), direct coating and lamination areal density 130g / cm 2 Softened split-fiber nonwovens based on fibers composed of polyethylene terephthalate and nylon.

[0048]On the first drawdown head, a polyurethane adhesive layer was applied (with a gap of about 0.1 mm) by means of an air knife. The tie layer is an aqueous dispersion containing a crosslinking agent. The tie coat is dried and crosslinked in an oven. On the second doctor head, the foam is applied by means of a roller doctor blade with a gap of about 1 to 4 mm. Mechanical foaming (Schlagschaum) of approximately 300 to 800 g / L is produced from approximately 35 to 60% aqueous polyurethane dispersions by means of a foam mixer with addition of foaming assistants. After drying and crosslinking, the adhesive layer is applied again by means of a roller doctor on the last third doctor head. At this point, use the same polyu...

Embodiment 2

[0051] Processing was performed as described in Example 1. Instead of a crosslinker-containing polyurethane tie coat, an aqueous dispersion of a crosslinker-free polyurethane tie coat is applied. Two coated split-film webs are produced by splitting. The surface of the cut foam resembles that of nubuck.

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PUM

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Abstract

A synthetic leather including a microfiber nonwoven has an adhesive on one surface and a layer of open-pore polyurethane foam thereon, wherein the surface of the polyurethane foam layer facing away from the microfiber nonwoven is obtained by splitting. The synthetic leather is manufacturable by a simple method in which little waste occurs. Further processing preferably takes place by back-injection in an injection molding tool.

Description

technical field [0001] The present invention relates to a new artificial leather derived from polyurethane foam, a process for its preparation and its use as a surface coating for plastic parts. Background technique [0002] Products using polyurethane foam in the interior of automobiles or other interior spaces are known. [0003] WO-A-01 / 10637 discloses a multilayer material for automotive interiors comprising a layer of open-celled polyurethane foam, fibers from plants on the surface to which the foam is applied, combining the fibers with the polyurethane foam A joined heat-hardenable resin and, if necessary, a decorative layer applied to the resin. [0004] WO-A-00 / 06375 discloses a multi-layer laminated product, the laminated product is formed by a polyurethane foam layer, on the two surfaces of the polyurethane foam layer, a mixture of endless fibers and chopped fibers is respectively applied. A woven fabric, the nonwoven fabric is bonded to a layer of polyurethane f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14
CPCB32B2605/08B32B7/12B32B27/065B32B5/18B32B2262/0261B32B2266/0278B32B5/10B32B2250/02B32B2601/00B32B2605/003D06N3/0004B32B5/022B32B27/12B32B5/24D06N3/0072B32B5/245B32B2262/0276D06N3/145B32B2266/06B32B27/40Y10T442/60Y10T442/647
Inventor F·耶丝特尔
Owner CARL FREUDENBERG KG