Polyurethane film for shoes

Abstract

The invention discloses a polyurethane film for shoes. The polyurethane film for shoes is formed by combining, by mass, 47-51% of polyurethane coatings in the uppermost layer, 40-41% of pressure sensitive adhesives at the middle layer and 7-15% of carbon fibers at the lowermost layer. The polyurethane coatings comprise isocyanate and polyether. The polyurethane film for shoes has the advantages of high intensity, elongation, solid content and adhesion stress.

Description

technical field [0001] The invention relates to a polyurethane film for shoes. Background technique [0002] There are many types of films on the market, but the most commonly used printing films are BOPP, NY, PET, PE. As far as printing is concerned, the most important thing is of course the surface treatment effect of the film and whether the NY film is damp. When printing, the process requirements for the surface tension of the film should be formulated for one film roll and one test. The corona effect is time-sensitive, if it is placed for a long time, the corona effect may drop too much to meet the printing requirements; it can also avoid the hidden trouble of printing due to accidentally reversed film surface. [0003] PE film is the object we focus on: when blowing film, some film rolls may miss corona treatment; excessive or uneven film thickness causes insufficient corona effect; film blowing is caused by adding too much slip agent or high cool If the proportion ...

AI Technical Summary

Problems solved by technology

[0003] PE film is the object we focus on: when blowing film, some film rolls may miss corona treatment; excessive or uneven film thickness causes insufficient corona effect; film blowing is caused by adding too much slip agent or high cool If the proportion of slippery pellets is too large, the corona effect will be greatly reduced

When the corona effect on both sides of the 12~15um PET film is not much different, it is easy to cause the back sticking failure of the printed film roll