Process for producing a low density foamed polyethylene

Details Process for producing a low density foamed polyethylene Process for producing a low density foamed polyethylene

1989-01-27

1990-08-28

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264 53, 264 55, 264 58, 264121, 264145, 264237, 264323, 264DIG13, 425 4C, B29C 4710

Patent

active

049523520

ABSTRACT:
A foamed and expanded low density polyethylene sheet or tube possesses both superior buoyancy and thermal resistance characteristics. The sheet or tube is made by a process including mixing a low density polyethylene with a blowing agent, surface activation agent and, preferably, a separation agent, heating the mixture at different temperatures to first melt the mixture and then gasify the blowing agent to expand the polyethylene cells, cooling the melted mass to partially harden and shrink the expanded cells, further expanding the cells by introducing a second gaseous blowing agent, cutting, extruding and cooling the expanded mass, forming a sheet or tube from the cooling mass, and finally cooling the sheet or tube for at least 24 hours. A buoyant, thermal resistant, water-repellent and moisture resistant sheet or tube results, which can be used, for example, as a liner for garments, including sports, business and military garments and other related equipment.

REFERENCES:
patent: 3067147 (1962-12-01), Rubens et al.
patent: 3098831 (1963-07-01), Carr
patent: 3198859 (1965-08-01), Tomlinson
patent: 3393260 (1968-07-01), Miler
patent: 3819784 (1974-06-01), Hasama et al.
patent: 4208367 (1980-06-01), Wunning
patent: 4360556 (1982-11-01), Heider
patent: 4370378 (1983-01-01), Zabrocki et al.
patent: 4387169 (1983-06-01), Zabrocki et al.

Affiliated with

Also associated with

Rating

Process for producing a low density foamed polyethylene does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing a low density foamed polyethylene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing a low density foamed polyethylene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1588516