A polymer composition containing two kinds of polymers and having a difference in its glass transition temperature of 3° C. or lower between before and after heat-treatment by getting it through a space between two parallel faces in a molten state.
Полный текст Патента US 8357761 + PDF
ФОРМУЛА ИЗОБРЕТЕНИЯ (CLAIMS)
What is claimed is:
1. A method for producing a polymer composition, comprising: melting a polymer mixture containing at least two kinds of polymer to obtain a molten polymer mixture, and passing the molten polymer mixture in a moving direction through two or more spaces between two parallel faces, wherein the polymer mixture comprises a polyphenylene sulfide resin and a nylon resin, and wherein a distance x between the two parallel faces of each of the two or more spaces is independently 0.5 to 5 mm and a distance y of each of the two or more spaces in the moving direction is independently 2 to 100 mm.
2. The method according to claim 1, wherein each of the two or more spaces is independently formed of two flat faces or two curved faces.
3. The method according to claim 1, further comprising: cooling rapidly the molten polymer mixture after the molten polymer mixture has passed through the spaces.