Aqueous polyurethane superfine fiber synthetic leather and preparation method thereof

A water-based polyurethane and microfiber technology, applied in fiber types, fiber treatment, textiles and papermaking, etc., to achieve the effects of reducing investment, eliminating solvent waste, reducing cost and energy waste

Active Publication Date: 2011-07-06
HUADA CHEM GRP CO LTD
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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 recent years Some progress, the main research focuses on the surface finishing of synthetic leather, only water-based dry film transfer technology and printing technology are applied in actual production, and the overall technology development of water-based polyurethane synthetic leather is still in the initial stage

Method used

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  • Aqueous polyurethane superfine fiber synthetic leather and preparation method thereof
  • Aqueous polyurethane superfine fiber synthetic leather and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] PA / COPET type fixed island non-woven fabric, its unit weight is 240g / m 2 , its apparent density is 0.30g / m 3 ; 100 parts of water-based polyurethane slurry, the water-based polyurethane slurry is DG-3020, and its dry film 100% modulus is 20KG / cm 2 , solid content 20% by weight, its viscosity is 6Pa.s, 3 parts of sodium dodecylbenzenesulfonate, 2 parts of stearic acid amine and 50 parts of water, stir with high-speed mixer, make the density of mixed slurry be 300g / L; impregnate the non-woven fabric with the mixed slurry in the impregnation tank, the impregnation amount is 400-550g / m 2 , to keep 30-60% of the cells; then in the coagulation tank, the pH value is 5, and the temperature is 20 ℃ aqueous coagulation liquid coagulation, washed in the water washing tank, and dried in an infrared drying oven to obtain the base cloth; and then The dried base fabric is subjected to an alkali weight reduction process in a continuous or batch type alkali weight reduction machine. ...

Embodiment 2

[0038] PA / COPET type fixed island non-woven fabric, its unit weight is 300g / m 2 , its apparent density is 0.33g / m 3 ; 100 parts of water-based polyurethane slurry, the water-based polyurethane slurry is DG-3050, and its dry film 100% modulus is 50KG / cm 2 , the solid content is 25% by weight, and its viscosity is 10Pa.s, 5 parts of sulfonated ammonium succinate foaming agents, 3 parts of foam stabilizer stearic acid amines and 100 parts of water, and the high-speed mixer stirs evenly to make the mixed slurry The density is 500g / L; in the impregnation tank, impregnate the non-woven fabric with the mixed slurry, and the impregnation amount is 600-660g / m 2, to keep 30-60% of the cells; then in the coagulation tank, the pH value is 4, the temperature is 25 ℃ water-based coagulation liquid coagulation, washed in the water washing tank, and dried in an infrared drying oven to obtain the base cloth; and then The dried base fabric is subjected to an alkali reduction process in a cont...

Embodiment 3

[0041] PA / COPET type fixed island non-woven fabric, its unit weight is 400g / m 2 , its apparent density is 0.35 / m 3 ; 100 parts of water-based polyurethane slurry, the dry film of DG-3100 slurry 100% tensile strength is 100KG / cm 2 , solid content is 30% by weight, and its viscosity is 16Pa.s, adds 4 parts of foaming agents of sodium sulfosuccinate, 2 parts of foam stabilizer ammonium stearates, 150 parts of water and 3 parts of water-based colorants (Shanghai Si Lianhei G-55), stir evenly with a high-speed mixer, so that the density of the mixed slurry is 550g / L; impregnate the non-woven fabric with the mixed slurry, and the impregnation amount is 950-1000g / m 2 , and then in the coagulation tank, the pH value is 3, and the temperature is 30 ° C. The water-based coagulation liquid is solidified, washed in the water washing tank, and dried in an infrared drying oven to obtain a base cloth; then the dried base cloth is continuously or intermittently Alkali reduction process in t...

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Abstract

The invention relates to aqueous polyurethane superfine fiber synthetic leather and a preparation method thereof. The preparation method comprises the following steps of: firstly, adding the following components according to parts by weight, i.e. 2-5 parts of foaming agents, 50-200 parts of water, 2-3 parts of foam stabilizers and 0-3 parts of waterborne colorants, into 100 parts of aqueous anionic polyurethane dipping sizing agents, and stirring the components and the sizing agents uniformly at high speed by using a blender so as to prepare a sizing agent; secondly, dipping non-woven fabricsin the sizing agent, scrapping the surface of the fabrics and keeping partial cells; thirdly, solidifying aqueous polyurethane on the dipped non-woven fabrics through aqueous coagulating liquid so asto form cells; fourthly, carrying out water scrubbing after aqueous polyurethane resin is completely solidified, and drying the aqueous polyurethane resin by an infrared drying oven so as to obtain base cloth; fifthly, treating the dried base cloth through an alkali reducing process; sixthly, treating the base cloth treated through the alkali reducing process through an postprocessing process; and seventhly, preparing the obtained base cloth into the synthetic leather. The aqueous polyurethane superfine fiber synthetic leather is prepared by the 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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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14D06M11/38D06M101/34D06M101/32
Inventor 曲建波郑玉袁秀强夏吉倩
Owner HUADA CHEM GRP CO LTD
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