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Preparing method of PU breathable leather

A breathable leather and surface layer technology, applied in the field of breathable leather, can solve the problems of PU leather airtightness, increased equipment and investment, and limited natural leather production

Inactive Publication Date: 2019-05-03
XUCHUAN CHEM SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The output of natural leather is limited, and people's awareness of environmental protection and ecology is increasing day by day, but traditional PU leather generally has the defect of airtightness. The process of PU breathable leather with laser drilling to improve air permeability in the later stage of tanning is still relatively complicated. Additional equipment and investment required

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of PU breathable leather comprises the following steps:

[0026] 1) Prepare the surface material

[0027] The surface layer material includes the following components by weight: 100 parts of surface layer resin, 40-45 parts of DMF, and 40-45 parts of MEK, and the viscosity of the surface layer mixture prepared according to the above components is 2000-2500CPS;

[0028] 2) Coat the surface material mixture on the surface of DE-7 release paper with a coating thickness of 15 wires, put the coated paper in an oven to dry, and dry the mixture to form a film at a drying temperature of 80~ 120°C;

[0029] 3) Prepare the adhesive layer

[0030] Next, the layer material includes the following components by weight: 100 parts of intermediate layer resin, 20 parts of DMF, and 25 parts of MEK; the viscosity of the intermediate layer material mixture prepared according to the above components is 3000-3500CPS;

[0031] 4) Coat the layer material mixture on th...

Embodiment 1

[0038] The preparation method of PU breathable leather comprises the following steps:

[0039] 1) Prepare the surface material

[0040] The surface layer material includes the following components by weight: 100 parts of surface layer resin, 40 parts of DMF, and 45 parts of MEK, and the viscosity of the surface layer mixture prepared according to the above components is 2000CPS;

[0041] 2) Coat the surface material mixture on the surface of DE-7 release paper with a coating thickness of 15 filaments, put the coated paper in an oven to dry, and dry the mixture to form a film at a drying temperature of 120°C ;

[0042] 3) Prepare the adhesive layer

[0043] Next, the layer material includes the following components by weight: 100 parts of intermediate layer resin, 20 parts of DMF, and 25 parts of MEK; the viscosity of the intermediate layer material mixture prepared according to the above components is 3000CPS;

[0044] 4) Coat the layer material mixture on the surface film ...

Embodiment 2

[0050] The preparation method of PU breathable leather comprises the following steps:

[0051] 1) Prepare the surface material

[0052] The surface layer material includes the following components by weight: 100 parts of surface layer resin, 42 parts of DMF, and 43 parts of MEK, and the viscosity of the surface layer mixture prepared according to the above components is 2200CPS;

[0053] 2) Coat the surface material mixture on the surface of DE-7 release paper with a coating thickness of 15 filaments, put the coated paper in an oven to dry, and dry the mixture to form a film at a drying temperature of 100°C ;

[0054] 3) Prepare the adhesive layer

[0055] Next, the layer material includes the following components by weight: 100 parts of the intermediate layer resin, 20 parts of DMF, and 25 parts of MEK; the viscosity of the intermediate layer material mixture prepared according to the above components is 3200CPS;

[0056] 4) Coat the layer material mixture on the surface f...

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Abstract

The invention discloses a preparing method of PU breathable leather, and belongs to the technical field of breathable leather. The preparing method of the PU breathable leather comprises the followingsteps of 1, preparing a surface layer material which is prepared from, by weight, 100 parts of surface layer resin, 40-45 parts of DMF and 40-45 parts of MEK; 2, smearing the surface layer material mixed solution on the surface a DE-7 release paper, placing the smeared paper in a drying oven to be dried, and drying the mixed solution into a film; 3, preparing a bonding layer material; 4, smearingthe bonding layer material mixed solution on the surface layer film, and placing the smeared paper into the drying oven to half-dry; 5, compounding microfiber cloth onto the bonding layer; 6, placingthe release paper of the compounded microfiber cloth in the drying oven to be dried; 7, separating the release paper and the microfiber cloth, and bonding the surface layer onto the microfiber cloththrough the bonding layer to obtain microfiber leather; 8, placing the microfiber leather into a kneading roller machine to prepare texture, and obtaining the PU breathable leather. According to the preparing method of the PU breathable leather, special resin is adopted to be attached to the surface and subjected to texture kneading, so that the leather has the functions of air permeability and water adsorption.

Description

technical field [0001] The invention belongs to the technical field of breathable leather, in particular to a preparation method of PU breathable leather. Background technique [0002] At present, my country's annual leather output is close to 1 / 4 of the world's, and the output of shoes is more than half of the world's. It is the world's largest leather producer, but it is not a leather power. In the process of moving from a leather power to a leather power, we will explore The future development trend of the leather industry is undoubtedly of guiding significance. [0003] The output of natural leather is limited, and people's awareness of environmental protection and ecology is increasing day by day, but traditional PU leather generally has the defect of airtightness. The process of PU breathable leather with laser drilling to improve air permeability in the later stage of tanning is still relatively complicated. Additional equipment and investment are required. Contents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/00D06N3/14
Inventor 朱小强吕华波柳红毅
Owner XUCHUAN CHEM SUZHOU
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