Environment-friendly color-changing method of synthetic leather bass

An environmentally friendly, synthetic leather technology, applied in fiber processing, textiles and papermaking, etc., can solve the technical defects of water-based polyurethane and other problems, achieve excellent bonding fastness, improve the working environment, and save energy consumption

Inactive Publication Date: 2010-04-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the particularity of the synthetic leather bass color change process, the application of water-based polyurethane in this area has always had serious technical defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of water-based color-changing slurry:

[0020] Add 100kg of water-based polyurethane resin and 20kg of black water-based color paste into a container with a stirrer and stir at room temperature for 25 minutes for later use.

[0021] (2) Preparation of color-changing layer

[0022] Apply the above-mentioned color-changing slurry evenly on the synthetic leather base by roller coating method, the sizing amount is 80g / m, the drying speed is 15m / min, and the drying temperature is 80°C.

[0023] (3) Mechanical embossing

[0024] After the water in the above-mentioned color-changing layer is completely volatilized, emboss by rolling, with a rolling pressure of 25MPa, a rolling temperature of 180°C, and a rolling speed of 15m / min.

Embodiment 2

[0026] (1) Preparation of water-based color-changing slurry:

[0027] Add 200kg of water-based polyurethane resin, 60kg of brown water-based color paste, 3kg of thickener and 1kg of leveling agent into a container with a stirrer and stir at room temperature for 25 minutes for later use.

[0028] (2) Preparation of color-changing layer

[0029] Apply the above-mentioned color-changing slurry evenly on the synthetic leather base by spraying method, the sizing amount is 100g / m, the drying speed is 15m / min, and the drying temperature is 90°C.

[0030] (3) Mechanical embossing

[0031] After the water in the above-mentioned color-changing layer is completely volatilized, emboss by plate pressing, the plate pressing pressure is 15Mpa, the plate pressing temperature is 80°C, and the time is 3s.

Embodiment 3

[0033] (1) Preparation of water-based color-changing slurry:

[0034] Add 300kg of water-based polyurethane resin, 120kg of beige water-based color paste, 9kg of thickener, 3kg of leveling agent and 3kg of cross-linking agent into a container with a stirrer and stir at room temperature for 30 minutes for later use.

[0035] (2) Preparation of color-changing layer

[0036] The above-mentioned color-changing paste is evenly coated on the synthetic leather base by the three-plate printing method, the sizing amount is 120g / m, the drying speed is 20m / min, and the drying temperature is 100°C.

[0037] (3) Mechanical embossing

[0038] After the water in the above-mentioned color-changing layer is completely volatilized, embossing is carried out by plate pressing, with a plate pressure of 18Mpa, a plate temperature of 90°C, and a time of 5 seconds.

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PUM

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Abstract

The invention discloses an environment-friendly color-changing method of synthetic leather bass, characterized by comprising the following steps: adding 100-300 parts by weight of aqueous urethane resin, 20-120 parts by weight of aqueous color paste, 0-9 parts by weight of thickener, 0-3 parts by weight of leveling agent and 0-3 parts by weight of crosslinker to a container with a stirrer; stirring at a room temperature for 25-30 minutes to prepare color-changing slurry; uniformly coating the color-changing slurry on a synthetic leather bass in sizing amount of 80-150g / m, at a drying temperature of 80-120 DEG C and at a drying speed of 15-20m / min; and then, adopting a rolling extrusion or plate extrusion mode to emboss, wherein the rolling extrusion is carried out under the pressure of 25-30MPa, at the temperature of 180-190 DEG C at the speed of 15-20min / min, and plate extrusion is carried out at the pressure of 15-18MPa, at the temperature of 80-90 DEG C and at the period of 3-5s. The method for preparing the color-changing layer and the bass has the advantages of excellent adhesion fastness, simple process, convenient operation, emission reduction and energy saving.

Description

technical field [0001] The invention relates to an environment-friendly method for changing the color of synthetic leather bases, belonging to the field of synthetic leather production. Background technique [0002] So far, polyurethane synthetic leather has become an indispensable main raw material for clothing, shoemaking, luggage, furniture and other industries due to its excellent comprehensive properties. The manufacturing process of polyurethane synthetic leather can be divided into two parts: the preparation of the base and the finishing. In the finishing process, the color change of the bass plays a vital role in the various properties (especially the appearance) of the finished leather. At present, the industry usually uses solvent-based polyurethane resin as the basic film-forming material for bass color change. This type of resin contains a large amount of toxic solvents such as toluene, xylene, acetone, butanone, ethyl acetate, and dimethylformamide. It is quit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/564D06N3/14B29C59/02
Inventor 范浩军陈意石欢欢张秀丽周建
Owner SICHUAN UNIV
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