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Method for preparing artificial leather based on natural latex

A technology of natural latex and artificial leather, used in textiles and papermaking, etc., can solve the problems of chlorine precipitation polluting the environment, side reactions, residual toxic substances in finished products, etc., to reduce production costs, solve difficult processing, and reduce the effects of toxic substances.

Pending Publication Date: 2020-03-24
杭州临安永伟实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the manufacturing process of polyurethane-based foaming layer, solvent foaming method can be used, such as DMF and other solvents that pollute the environment; solvent-free foaming method can also be used, which will have side reactions of incomplete isocyanate reaction , making the problem of residual toxic substances in the finished product
In addition, the cost of using water-based polyurethane foam is very high, which is not conducive to industrial production
[0005] In the manufacturing process of artificial leather with polyvinyl chloride as the main foam layer, chlorine will be precipitated to pollute the environment, and the chlorine residue in the finished product is toxic to a certain extent.

Method used

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  • Method for preparing artificial leather based on natural latex
  • Method for preparing artificial leather based on natural latex
  • Method for preparing artificial leather based on natural latex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing artificial leather based on natural latex, the method steps described are as follows:

[0031] S1. The parts by weight are 100 parts of natural latex, 0.5 parts of anti-aging agent, 4 parts of vulcanizing agent, CaCO 3 5 parts of filler, 0.8 part of thickener, 3 parts of defoamer, 6 parts of color paste, stir the above raw materials at a speed of 1000 rpm for 10-20 minutes until they are evenly mixed; filter with a mesh filter with a size of 120-100 ; Vacuum stirring for 0.5-1.5 hours to obtain a scraping slurry.

[0032] S2. If figure 1 , arrange the woven fabric in the immersion pool 1 for immersion, press dry and iron roller 2 to dry and iron at 100-160°C, and apply 300-500g / m 2 The mixed slurry is transferred to the cloth base, and then enters No. 1 oven 4 for baking at a drying temperature of 100-120°C and a drying speed of 8 m / min, and then coiled to form a type A semi-finished product.

[0033] S3. If image 3 , the A-type semi-finished...

Embodiment 2

[0036] A method for preparing artificial leather based on natural latex, the method steps described are as follows:

[0037] S1. Take 100 parts by weight of natural latex, 0.5 parts of anti-aging agent, 4 parts of vulcanizing agent, 0.6 parts of thickener, 4 parts of defoamer, and 6 parts of color paste, and stir the above raw materials at a speed of 1000 rpm 10-20 minutes to mix evenly; filter with a filter screen with a size of 120-100 mesh; vacuum stir for 0.5-1.5 hours to obtain an impregnation slurry.

[0038] S2. If figure 2 , soak the non-woven fabric in the immersion tank 1, press dry and iron the iron roller 2 and iron it at 100-160°C, and put 400-800g / m2 in the immersion tank 3 2 The mixed slurry is transferred to the cloth base, and then enters No. 1 oven 4 for baking at a drying temperature of 100-120°C and a drying speed of 7 m / min, and then coiled to form a B-type semi-finished product.

[0039] S3. If Figure 4 , the B-type semi-finished product adopts the d...

Embodiment 3

[0042] A method for preparing artificial leather based on natural latex, the method steps described are as follows:

[0043]S1. The parts by weight are 100 parts of natural latex, 0.5 parts of anti-aging agent, 4 parts of vulcanizing agent, CaCO 3 5 parts of filler, 0.8 part of thickener, 3 parts of defoamer, 6 parts of color paste, stir the above raw materials at a speed of 1000 rpm for 10-20 minutes until they are evenly mixed; filter with a mesh filter with a size of 120-100 ; Vacuum stirring for 0.5-1.5 hours to obtain a scraping slurry.

[0044] S2. If figure 1 , arrange the woven fabric in the immersion pool 1, soak it in water, press it through the dry ironing roller 2 and iron it at 100-160 ° C, and transfer the 300-500g / m2 mixed slurry to the cloth base through the scraping machine 5 , enter No. 1 oven 4 for baking, the drying temperature is 100-120 ° C, and the drying speed is 8 m / min, and then coiled to form a type A semi-finished product.

[0045] S3. If Figu...

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PUM

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Abstract

The invention discloses a method for preparing artificial leather based on natural latex, and relates to the technical field of artificial leather preparation The method comprises the following stepsof S1, preparing a mixed slurry; S2, soaking, pressing and drying and ironing a cloth substrate, transferring the mixed slurry to the cloth substrate, and performing baking to form a semi-finished product; and S3, carrying out embossing on the semi-finished product to obtain a finished product. The mixed slurry is either a coating and scraping slurry or a dipping slurry. By means of the method, toxic substances generated in the preparation process of artificial leather are reduced, toxic substances remaining in finished products are reduced, environment pollution is alleviated, the problem that the natural latex is not easy to process is solved, and the production cost is reduced. The artificial leather has the characteristics of waterproofing, hydrolysis resistance, cold resistance and high elasticity.

Description

technical field [0001] The invention relates to the technical field of artificial leather preparation, in particular to a method for preparing artificial leather based on natural latex. Background technique [0002] Artificial leather is a plastic and rubber product that looks and feels like real leather and can be used instead of it. It is usually made of fabric as the base, coated with synthetic resin and various plastic rubbers. [0003] Mainly include PVC artificial leather, PU artificial leather, etc. PVC artificial leather uses polyvinyl chloride as the main foam layer, and PU artificial leather uses polyurethane as the main body. [0004] In the manufacturing process of polyurethane-based foaming layer, solvent foaming method can be used, such as DMF and other solvents that pollute the environment; solvent-free foaming method can also be used, which will have side reactions of incomplete isocyanate reaction , making the problem of residual toxic substances in the fi...

Claims

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Application Information

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IPC IPC(8): D06N3/00D06N3/14D06N3/18
CPCD06N3/0077D06N3/0097D06N3/0088D06N3/145D06N3/183
Inventor 梁伟文
Owner 杭州临安永伟实业有限公司