Polyurethane resin for high-density shoe leather and preparation method thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A high-density, wet-process polyurethane technology, used in textiles and papermaking, etc., can solve the problems of slow solidification speed of coating slurry, low solid content of impregnating material, and difference in solidification speed, etc. Penetration, the effect of reducing the difference in penetration speed
Active Publication Date: 2011-09-14
SHANGHAI HUIDE TECH CO LTD
View PDF3 Cites 12 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, impregnation materials generally have low solid content and fast solidification speed, and coating slurry with high solid content and slow solidification speed will easily cause differences in solidification speed and cause shelling and other undesirable phenomena.
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
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
Login to view more
Abstract
The invention relates to wet-process polyurethane resin for high-density shoe leather. The polyurethane resin is prepared from isocyanate, a polyether polyol mixture, a chain extender and N, N-dimethylformamide serving as an organic solvent. Polyoxytetramethylene-ethylene epoxide copolyether diol and polyoxypropylene diol are taken as macromolecular polylol raw materials for reacting, the raw materials have high hydrolysis resistance and the polyurethane resin can be endowed with high low-temperature flexibility and rebound resilience, so that the prepared high-density shoe leather has finer folds, high durability and high low-temperature adaptability, and recovers quickly. On the aspect of synthesis technology, a special process for stepwise reaction of two polyether polyols is designed,so that a macromolecular structure is more regular, and advantages of the two polyether polyols can be brought into play.
Description
technical field [0001] The present invention relates to a synthetic method of wet-process polyurethane resin for synthetic leather and its production process, in particular to a high-density polyurethane resin for shoe leather with high peeling resistance, hydrolysis resistance, crease resistance and low temperature flex resistance and its preparation method . Background technique [0002] At present, the high-quality shoe leather on the market is made through the wet on wet process, and the shoe leather made by this process is also called high-density shoe leather. [0003] The wet on wet process is to impregnate the non-woven fabric through the impregnation tank, and then directly coat a layer of working slurry on the surface of the non-woven fabric through the coating head without pre-solidification treatment, and then pass the non-woven fabric through the coagulation tank in turn Coagulation treatment and water washing treatment are carried out with the washing tank. A...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more