Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF0 Cites 22 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Water-based polyurethane superfine fiber synthetic leather and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 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% 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 , keeping 40-85% 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

[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% 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 120 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 , keeping 40-85% of the cells; then in the coagulation tank, the pH value is 4, the temperature is 25 ℃ aqueous coagulation liquid solidification, 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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Viscosityaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D06N3/12B32B27/04B32B27/40B32B37/02B32B38/00
Inventor 李翠平
Owner 李翠平
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com