Molding powder of ultra-high molecular weight polyethylene and p

Details Molding powder of ultra-high molecular weight polyethylene and p Molding powder of ultra-high molecular weight polyethylene and p

1980-04-21

1981-01-20

Levin, Stanford M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 336PQ, 264331, 428339, 528481, 528503, C08F 600, C08F11002

Patent

active

042463904

ABSTRACT:
Ultra-high molecular weight polyethylene powder is heated at a temperature between its crystalline melting point and about 275.degree. C. for a short period of time ranging from about one minute to about thirty minutes to obtain a molding powder having properties which facilitate the subsequent step of compression molding. Compression molded pieces made from heat-treated powder have better transparency, gloss and low-temperature mechanical properties than those made from untreated powder.

REFERENCES:
patent: 3412080 (1968-11-01), Smith et al.
patent: 3847888 (1974-11-01), Baumgartner
"Design and Fabrication Guide," Polymer Dept., Hercules, Inc., Wilmington, Del. (Undated).
"Encyc. of Pol. Sci. and Tech.," 6, pp. 332-336 (1967).

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