Method of producing thermoplastic resin sheet or film

Details Method of producing thermoplastic resin sheet or film Method of producing thermoplastic resin sheet or film

1983-09-26

1985-10-22

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264557, 264562, 264178R, 425 71, 425224, 425379R, B29F 308

Patent

active

045487782

ABSTRACT:
A method of producing a thermoplastic sheet or film characterized in that a molten thermoplastic resin sheet extruded through a T-die is cooled by introducing it into a multi-stage slit in which a cooling water is flowing. The water level in the first slit of the multi-stage slit is maintained at as low a level as possible. The method produces various advantages over conventional methods; for example, the sheet or film is free from unevenness in thickness, wrinkles, and curls, and is of high uniformity, and the sheet or film can be formed by high-speed molding of at least 10 m/min. The sheet or film is suitable for use in wrapping of, for example, foods and medicines.

REFERENCES:
patent: 2728951 (1956-01-01), O'Hanlon et al.
patent: 3119151 (1964-01-01), Corbett
patent: 3199148 (1965-08-01), Koppehele
patent: 3361728 (1968-01-01), Coen et al.
patent: 3402428 (1968-09-01), Schreiber
patent: 3822333 (1974-07-01), Haruta et al.
patent: 3862285 (1975-01-01), North et al.
patent: 4078033 (1978-03-01), Czerwon et al.

Affiliated with

Also associated with

Rating

Method of producing thermoplastic resin sheet or film 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 of producing thermoplastic resin sheet or film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing thermoplastic resin sheet or film will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-121302