Method for manufacturing a cross-linked thermoplastic resin foam

Details Method for manufacturing a cross-linked thermoplastic resin foam Method for manufacturing a cross-linked thermoplastic resin foam

1992-08-10

1994-05-10

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264 55, 264DIG18, B29C 6722

Patent

active

053105133

ABSTRACT:
There are provided a method and an apparatus for continuously manufacturing a cross-linked thermoplastic resin foam arranged as follows. A resin composition, which contains at least a thermoplastic resin, a foaming agent, and a cross-linking agent, is extruded into a closed die, which includes at least a molding region, a heating region, and a cooling region, continuously arranged in the order named. The resin composition is molded into a desired shape in the molding region of the die, and is then heated in the heating region to decompose the cross-linking agent and also to decompose at least part of the foaming agent so that cell nuclei are produced, thereby forming a partially foamed product. In the cooling region of the die, the partially foamed product is cooled to a temperature lower than the softening point thereof to be increased in rigidity, and is extruded to the outside of the die while being subjected to a damping force as it moves in the cooling region. The partially foamed product, extruded from the die, is heated under the atmospheric pressure to expand the foaming agent fully, whereupon a final product is obtained.

REFERENCES:
patent: 3458608 (1969-07-01), Russell et al.
patent: 3819784 (1974-06-01), Hasama et al.
patent: 3879505 (1975-04-01), Boutillier et al.
patent: 4151238 (1979-04-01), Ziemek et al.
patent: 4366263 (1982-12-01), Sato et al.
patent: 4552708 (1985-11-01), Kimura et al.
patent: 4585605 (1986-04-01), Kaduta et al.
patent: 4671910 (1981-06-01), Fuhrmann
patent: 4952352 (1990-08-01), Shin

Affiliated with

Also associated with

Rating

Method for manufacturing a cross-linked thermoplastic resin foam does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for manufacturing a cross-linked thermoplastic resin foam, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for manufacturing a cross-linked thermoplastic resin foam will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2411448