Method for processing waste leather into top-layer leather

A processing method and technology for the first layer of leather are applied in the processing field of processing waste leather into the first layer of leather, which can solve the problem of low leather material properties, low leather added value, insufficient tensile strength and bending resistance. and other problems, to achieve good effect of high temperature resistance, excellent adhesion, oxidation resistance and thermal stability

Active Publication Date: 2016-04-20
DONGGUAN TIANYI LEATHER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The physical properties of leather made by these methods are low, such as tensile properties, bending resistance, etc., which cannot meet the requirements of high-quality leather, and the added value of leather is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A kind of processing method of processing waste leather into top layer leather according to this embodiment comprises the following steps:

[0069] (1) Material selection: select the waste leather produced after furniture production and processing for backup;

[0070] (2) Spraying hot melt adhesive: spread the waste leather into a layer, and then spray a layer of hot melt adhesive material on the waste leather;

[0071] (3) Paste resin film: paste a layer of resin film on the hot melt adhesive layer;

[0072] (4) Bonding fabric: Lay a layer of fabric on the resin film to obtain a finished leather product.

[0073] Wherein, in the step (2), the hot melt adhesive material consists of the following raw materials in parts by weight:

[0074] 20 parts of oleoresin

[0075] Polyoxypropylene glycol 15 parts

[0076] 10 parts diisocyanate

[0077] 12 parts of polytetrahydrofuran diol

[0078] 6 parts of polymethyl methacrylate.

[0079] The oleoresin is a mixture of PU r...

Embodiment 2

[0085] The difference between this example and Example 1 is that in step (2) of this example, the hot melt adhesive material consists of the following raw materials in parts by weight:

[0086] 25 parts of oleoresin

[0087] Polyoxypropylene glycol 18 parts

[0088] 15 parts of diisocyanate

[0089] Polytetrahydrofuran diol 15 parts

[0090] 10 parts of polymethyl methacrylate.

[0091] The oily resin is a mixture of oily acrylic resin and terpene tackifying resin in a mass ratio of 1:2.

[0092] In the step (3), the resin film is a PE resin film.

[0093] Wherein, the cloth is linen.

[0094] Wherein, the spraying thickness of the hot melt adhesive material layer is 0.26mm, and the thickness of the resin film is 0.9mm.

[0095] Among them, the tensile strength of the finished leather is 24N, the elongation at break is 12.15%, and the wear resistance coefficient is 16.6. After 45,000 twists and turns, the surface has no obvious changes and cracks.

[0096] The rest of t...

Embodiment 3

[0098] The difference between this example and Example 1 is that in step (2) of this example, the hot melt adhesive material consists of the following raw materials in parts by weight:

[0099] 28 parts of oleoresin

[0100] 20 parts of polyoxypropylene glycol

[0101] 18 parts of diisocyanate

[0102] Polytetrahydrofuran glycol 18 parts

[0103] 12 parts of polymethyl methacrylate.

[0104] The oily resin is a mixture of oily acrylic resin and methylphenyl polysiloxane resin in a mass ratio of 2:1.

[0105] In the step (3), the resin film is a polysulfone resin film.

[0106] Among them, the cloth is silk.

[0107] Wherein, the spraying thickness of the hot melt adhesive material layer is 0.28 mm, and the thickness of the resin film is 1 mm.

[0108] Among them, the tensile strength of the finished leather is 32N, the elongation at break is 18.2%, and the wear resistance coefficient is 13.8. After 30,000-50,000 twists and turns, the surface has no obvious changes and cr...

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Abstract

The invention relates to the technical field of leather processing, in particular to a method for processing waste leather into top-layer leather. The method comprises steps as follows: selection: the waste leather produced after furniture production processing is selected for standby application; spraying of a hot-melt adhesive: the waste leather is laid flatly as one layer, and then a hot-melt adhesive material layer is sprayed on the waste leather; attachment of a resin film: the resin film is attached to the hot-melt adhesive material layer; attachment of cloth: a layer of cloth is attached to the resin film, and a finished leather product is prepared. The leather prepared with the method has good tensile strength and breaking resistance, and the added value of the finished leather product is high.

Description

technical field [0001] The invention relates to the technical field of leather processing, in particular to a processing method for processing waste leather into top layer leather. Background technique [0002] In the prior art, because of the small area and irregular shape of furniture waste leather, usually it can only be discarded, which greatly wastes raw materials. If it can be reused, especially processed into recycled leather, it will produce Considerable wealth, and at the same time have positive significance for green energy conservation and environmental protection. [0003] At present, the methods of using furniture waste leather to process recycled leather include: fragment bonding method, fiber bonding method and fiber stabbing method. Among them, the fragment bonding method refers to the process of first processing the corium into corium fragments and then bonding them into leather; the fiber bonding method refers to the processing method of first processing t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/02B32B9/04B32B27/12C09J175/08C09J175/04C09J145/00C09J133/00C09J11/08C08L75/04C08L23/06C08L81/06
CPCB32B9/025B32B9/045B32B27/12B32B2250/03B32B2307/54B32B2307/546B32B2307/554B32B2479/00C08J5/18C08J2375/04C08J2423/06C08L75/04C08L2203/16C08L2205/025C08L2205/035C09J11/08C09J133/00C09J145/00C09J175/08C08L45/00C08L33/12C08L75/08C08L33/00C08L83/04C08L23/06C08L81/06
Inventor 陈承涛
Owner DONGGUAN TIANYI LEATHER TECH CO LTD
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