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Waterborne polyurethane synthetic leather and preparation method thereof

A technology of water-based polyurethane and synthetic leather, which is applied in textiles and papermaking, radiation wave/microwave fiber treatment, fiber treatment, etc. It can solve the problems of poor flexibility and folding resistance of synthetic leather, achieve soft hand feeling, avoid volatilization and residue problems , good feel effect

Active Publication Date: 2018-04-06
浙江昶丰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is to overcome the defects of poor flexibility and folding resistance of water-based polyurethane synthetic leather in the prior art, thereby providing a kind of water-based polyurethane synthesis and preparation method thereof with excellent flexibility and folding resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Immerse 220 grams per square meter of ordinary polyester non-woven fabric with a thickness of 0.9mm in an aqueous solution of polyvinyl alcohol with a concentration of 5% and a viscosity of 100CPs, press it through two dipping and two rolling rolls, and then bake it at 130°C Get the pretreated non-woven fabric in 4 minutes, impregnate it in the slurry of water-based polyurethane, pass the full pressure of the roll, and then impregnate in the slurry of water-based polyurethane again, control the gap between the rolls to be 60% and carry out gap rolling to obtain the impregnated non-woven fabric. Cloth, the impregnated non-woven fabric is solidified at a microwave frequency of 500MHz and a temperature of 130°C for 2 minutes, then washed with water and baked at 140°C for 3 minutes to obtain a non-woven fabric sheet, and the surface layer slurry is scraped on the release type On the paper, the thickness of scraping coating is 0.12mm, put it into the oven and bake at 80°C, 10...

Embodiment 2

[0033] Immerse 220 grams per square meter of ordinary polyester non-woven fabric with a thickness of 0.9mm in an aqueous solution of polyvinyl alcohol with a concentration of 10% and a viscosity of 670CPs, press it through two dipping and two rolling rolls, and then bake it at 130°C Get the pretreated non-woven fabric in 4 minutes, impregnate it in the slurry of water-based polyurethane, pass the full pressure of the roll, and then impregnate in the slurry of water-based polyurethane again, control the gap between the rolls to be 60% and carry out gap rolling to obtain the impregnated non-woven fabric. Cloth, the impregnated non-woven fabric is solidified at a microwave frequency of 1500MHz and a temperature of 70°C for 3 minutes, then washed with water and baked at 140°C for 3 minutes to obtain a non-woven fabric sheet, and the surface layer slurry is scraped on the release type On the paper, the thickness of scraping coating is 0.12mm, put it into the oven and bake at 80°C, 1...

Embodiment 3

[0039] Immerse 220 grams per square meter of ordinary polyester non-woven fabric with a thickness of 0.9mm in an aqueous solution of polyvinyl alcohol with a concentration of 12% and a viscosity of 800CPs, press it through two dipping and two rolling rolls, and then bake it at 130°C Get the pretreated non-woven fabric in 4 minutes, impregnate it in the slurry of water-based polyurethane, pass the full pressure of the roll, and then impregnate in the slurry of water-based polyurethane again, control the gap between the rolls to be 60% and carry out gap rolling to obtain the impregnated non-woven fabric. Cloth, the impregnated non-woven fabric is solidified at a microwave frequency of 2500MHz and a temperature of 60°C for 1 minute, then washed with water and baked at 140°C for 3 minutes to obtain a non-woven fabric sheet, and the surface layer slurry is scraped on the release type On the paper, the thickness of scraping coating is 0.12mm, put it into the oven and bake at 80°C, 10...

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Abstract

The invention belongs to the technical field of production of synthetic leather and particularly relates to waterborne polyurethane synthetic leather and a preparation method thereof. The preparationmethod comprises the following steps: (1) impregnating non-woven fabric with a preimpregnating solution, and performing press-rolling and drying on the non-woven fabric to obtain pretreated non-wovenfabric; (2) impregnating the pretreated non-woven fabric in waterborne polyurethane size to obtain impregnated non-woven fabric; (3) solidifying the impregnated non-woven fabric under a microwave condition, washing the non-woven fabric with water, and drying the non-woven fabric to form non-woven fabric sheets; (4) performing veneering on the non-woven fabric sheets to obtain the waterborne polyurethane synthetic leather. According to the waterborne polyurethane synthetic leather and the preparation method, solidification is performed under the microwave condition, so that local polyurethane is prevented from forming a film under drying on the fiber surface, adhesion between polyurethane and fiber is reduced, and the polyurethane synthetic leather with soft feel and excellent folding resistance is prepared.

Description

technical field [0001] The invention belongs to the technical field of synthetic leather manufacture, and in particular relates to a water-based polyurethane synthetic leather and a preparation method thereof. Background technique [0002] Non-woven fabric, also known as non-woven fabric, is a kind of fabric formed without weaving gauze. It is formed by orienting or randomly arranging short textile fibers or filaments to form a web structure, and then adopting mechanical, thermal bonding or chemical methods, etc. Reinforced. Non-woven fabrics are widely used in the preparation of synthetic leather due to their moisture-proof, breathable, light weight and rich colors. The front and back are very similar to leather, and have a certain degree of air permeability, which is closer to natural leather than ordinary artificial leather, so it is widely used in the production of shoes, boots, bags, car seats and sofas. The so-called synthetic leather often refers to polyurethane syn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14D06N3/00D06M15/59D06M10/00
CPCD06M10/003D06M15/59D06N3/0004D06N3/0011D06N3/0045D06N3/0059D06N3/0097D06N3/145D06N2205/023D06N2209/103D06N2211/28
Inventor 赵学辉邵晨旭
Owner 浙江昶丰新材料有限公司
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