Die design for underwater pelletization of high flow rate polyme

Details Die design for underwater pelletization of high flow rate polyme Die design for underwater pelletization of high flow rate polyme

1987-08-06

1989-04-18

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

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

To form particulate product

264178F, 425 67, 425311, 425313, 425463, 4253824, B29B 1110, B29C 4712

Patent

active

048225460

ABSTRACT:
High melt flow rate polymers are pelletized with greater uniformity and less malformed pellets from underwater extrusion process by die orifices having a narrow preland sufficient to evenly distribute the polymer followed by a wide final hole that forms a polymer strand sufficient to avoid deformation by water currents during pelletization.

REFERENCES:
patent: 3849241 (1974-11-01), Butin et al.
patent: 3949039 (1976-04-01), Yamamoto et al.
patent: 3981959 (1976-09-01), Cuff
patent: 4138208 (1979-02-01), Heckeroth
patent: 4321026 (1982-03-01), Lambertus
patent: 4347206 (1982-08-01), Roberts
patent: 4380570 (1983-04-01), Schwarz
patent: 4461737 (1984-07-01), Voss

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