Method for producing molding material

Details Method for producing molding material Method for producing molding material

1997-12-24

2000-08-29

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

To form particulate product

264237, 264346, 264348, 26417719, 264907, B29C 4788, B29C 7102

Patent

active

06110406&

ABSTRACT:
Disclosed is a method for producing a molding material, which comprises melt-extruding a styrenic polymer essentially having a syndiotactic structure or a composition containing the polymer to give strands, then rapidly cooling the resulting strands to thereby make the surface temperature of the strands not higher than the melting point of the styrenic polymer or the composition containing the polymer, and thereafter gradually cooling them to thereby make the surface temperature of the strands not higher than a temperature higher by 20.degree. C. than their glass transition temperature, and finally pelletizing the strands into pellets. The pellets produced have a high degree of crystallinity and can be well molded into good moldings.

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Macromolecular Physics, vol. 2, Wunderlich, Bernhard, Academic Press 1976, pp. 160-161.
Introduction to Polymers, Young, Robert J., Chapman & Hall 1981, pp. 184-186.
Concise Encyclopedia of Polym. Sci. & Eng., Jacqueline Kroschwitz Ed., John Wiley & Sons 1990, pp. 228-230.

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