Ethylene copolymers and their use for the manufacture of films

Details Ethylene copolymers and their use for the manufacture of films Ethylene copolymers and their use for the manufacture of films

1979-11-13

1982-01-19

Smith, Edward J.

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Structurally defined web or sheet

Physical dimension specified

526124, 526159, 526348, 5263481, 5263482, 5263484, 5263485, 5263486, 526905, C08F 1002

Patent

active

043117520

ABSTRACT:
Copolymers of ethylene and higher 1-olefins which are suitable for the manufacture of thin films, are preferably prepared in a two-step process, the first step yielding a polymer having a high molecular weight, the second step giving a polymer having a low molecular weight. The films obtained from these copolymers have improved mechanical properties as compared to films manufactured from known corresponding raw materials. The mechanical properties are furthermore uniform in longitudinal and in transverse direction.

REFERENCES:
patent: 3392213 (1968-07-01), Berger
patent: 3513143 (1970-05-01), Diedrich et al.
patent: 3592880 (1971-07-01), Diedrich et al.
patent: 3981849 (1976-09-01), Frese et al.
patent: 4133944 (1979-01-01), Cooper et al.
Raff et al., Crystalline Olefin Polymers, vol. XX, Part II, Interscience Publ., N.Y., (1964) pp. 553 and 560.

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