Water-based polyurethane superfine fiber synthetic leather and preparation method thereof

A water-based polyurethane and ultra-fine fiber technology, applied in chemical instruments and methods, synthetic resin layered products, lamination, etc., to achieve the effect of reducing cost and energy waste, reducing investment and good hand feeling

Inactive Publication Date: 2014-05-07
李翠平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All countries have great policy and financial support for the research and application of water-based polyurethane, and my country has also invested heavily in the research and application of water-based polyurethane resin, but the application of water-based polyurethane resin in synthetic leather is relatively only in

Method used

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  • Water-based polyurethane superfine fiber synthetic leather and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0016] Example 1

[0017] PA / COPET type fixed island non-woven fabric, its unit weight is 240g / m 2 , Its apparent density is 0.30g / m 3 ; 120 parts of water-based polyurethane slurry, the water-based polyurethane slurry is DG-3020, and its dry film 120% tensile strength is 20KG / cm 2 , The solid content is 20% by weight, the viscosity is 6Pa.s, 3 parts of sodium dodecylbenzene sulfonate, 2 parts of amine stearate and 50 parts of water, stir evenly with a high-speed mixer to make the mixed slurry density 300g / L; In the impregnation tank, impregnate the non-woven fabric with the mixed slurry, and the impregnation amount is 400~550g / m 2 , Keep 40-85% of the cells; then coagulate in the coagulation tank with an aqueous coagulation solution with a pH of 5 and a temperature of 20°C, wash in the washing tank, and dry in an infrared drying box to obtain the base fabric; After drying, the base fabric undergoes an alkali reduction process in a continuous or intermittent alkali reduction mach...

Example Embodiment

[0019] Example 2

[0020] PA / COPET type fixed island non-woven fabric, its unit weight is 300g / m 2 , Its apparent density is 0.33g / m 3 ; 120 parts of water-based polyurethane slurry, the water-based polyurethane slurry is DG-3050, and its dry film 120% tensile strength is 50KG / cm 2 , The solid content is 25% by weight, the viscosity is 10Pa.s, 5 parts of sulfonated succinic acid amine foaming agent, 3 parts of foam stabilizer amine stearate, and 120 parts of water. The high-speed mixer stirs evenly to make the mixed slurry The density is 500g / L; the non-woven fabric is impregnated with the mixed slurry in the impregnation tank, and the impregnation amount is 600~660g / m 2 , Keep 40-85% of the cells; then coagulate in the coagulation tank with an aqueous coagulation solution with a pH of 4 and a temperature of 25°C, wash in a washing tank, and dry in an infrared drying box to obtain a base cloth; The dried base fabric undergoes an alkali reduction process in a continuous or intermit...

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Abstract

The invention relates to a water-based polyurethane superfine fiber synthetic leather and a preparation method thereof. The preparation method comprises the following steps: 1) adding 4-8 parts by weight of a foaming agent, 50-200 parts by weight of water, 1-6 parts by weight of a foam stabilizing agent and 0-3 parts by weight of a water-based colorant into 120 parts by weight of a water-based anionic polyurethane impregnating slurry, and uniformly stirring at a high speed by a stirrer, to obtain a slurry; 2) impregnating a non-woven fabric in the slurry, scraping the surface flatly, and keeping a part of foam pores; 3) adopting a water-based solidification liquid to solidify water-based polyurethane of the impregnated non-woven fabric, and after the water-based polyurethane is solidified, forming foam pores; 4) after the water-based polyurethane resin is completely solidified, washing with water, drying by an infrared drying box, and thus obtaining base cloth; 5) carrying out an alkali deweighting process of the dried base cloth; 6) carrying out a posttreatment process of the base cloth obtained after the alkali deweighting process, and 7) preparing the synthetic leather from the obtained base cloth. The water-based polyurethane superfine fiber synthetic leather is prepared by the above preparation method.

Description

technical field [0001] The invention relates to a water-based polyurethane superfine fiber synthetic leather and a preparation method thereof, belonging to the technical field of synthetic leather production. Background technique [0002] At present, polyurethane synthetic leather has been used in various fields of people's life, and there are various varieties. Among them, the high-grade microfiber synthetic leather has developed rapidly in recent years due to its advantages in physical properties and the appearance of imitation leather. The traditional wet production process of superfine fiber synthetic leather is to impregnate non-woven fabric with solvent-based polyurethane as the impregnating slurry, then solidify in DMF (dimethylformamide) aqueous solution, extract it from a hot toluene tank, wash and dry, Among them, a large amount of DMF and toluene are used, and the solvents that cannot be fully recovered are discharged in the form of gas and waste water, polluting ...

Claims

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Application Information

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IPC IPC(8): D06N3/12B32B27/04B32B27/40B32B37/02B32B38/00
Inventor 李翠平
Owner 李翠平
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