Process for producing polyethylene articles having a high tensil

Details Process for producing polyethylene articles having a high tensil Process for producing polyethylene articles having a high tensil

1987-10-09

1989-12-19

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264171, 2642107, 26421118, 2642893, 26433117, B29C 3508

Patent

active

048881414

ABSTRACT:
High strength and modulus articles, such as filaments, fibers, tapes, films, tubes, bars or profiles, are prepared by irradiating a solid, particular, lamellar, disentangled polyethylene with a Mw>4.times.10.sup.5, transforming this polyethylene above the melt temperature into an article, cooling said article to below the melting point and stretching it in several steps at rising temperature but below the melting point of the article.
Advantages are i.a. the lower costs compared with the known processes, such as solid state extrusion or thermoreversible gelation.

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patent: 4655769 (1987-04-01), Zachariades

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