Large void-free polyethylene

Details Large void-free polyethylene Large void-free polyethylene

1975-04-04

1976-09-07

Seccuro, Carman J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

252478, 260897A, C08K 338

Patent

active

039793575

ABSTRACT:
Large void-free castings of polyethylene can be made by blending high density polyethylene pellets with low density polyethylene powder, followed by heating to above the melting point of the low density polyethylene and below, or only slightly above, the melting point of the high density polyethylene. Flame proofing additives, crosslinking agents and other materials can be readily incorporated into the blend before fusing. The mixture of high density and low density polyethylene significantly reduces the amount of shrinkage which takes place during the cooling from the melting temperature to ambient temperature. The low density polyethylene should have a sufficiently low melt viscosity so that it will flow under small pressures above the melting temperature.

REFERENCES:
patent: 2919474 (1960-01-01), Cole
patent: 3231636 (1966-01-01), Snyder et al.
patent: 3474051 (1969-10-01), Chappelar et al.
patent: 3478132 (1969-11-01), Randolph
patent: 3511742 (1970-05-01), Rasmussen

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