Process for preparation of injection molded body of olefin/vinyl

Details Process for preparation of injection molded body of olefin/vinyl Process for preparation of injection molded body of olefin/vinyl

1987-03-31

1989-01-17

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

2643288, 26432817, B29C 4516, B29C 4546

Patent

active

047986972

ABSTRACT:
An injection-molded body comprising a layer of an olefin/vinyl alcohol copolymer having a very high molecular weight is obtained by melt-kneading a composition comprising (i) a high-molecular-weight olefin/vinyl alcohol copolymer having a melt flow rate of 0.4 to 6.0 g/10 min as determined at 190.degree. C. and a vinyl alcohol content of 40 to 80 mole % and (ii) a low-molecular-weight olefin/vinyl alcohol copolymer having a melt flow rate of 3.0 to 60 g/10 min as determined at 190.degree. C., which is higher by at least 0.5 g/10 min than that of the high-molecular-weight ethylene/vinyl alcohol copolymer (i), and a vinyl alcohol content of 45 to 85 mole % at a weight ratio of from 98/2 to 40/60, and injecting the melt-kneaded composition into a mold through an orifice.

REFERENCES:
patent: 3882259 (1975-05-01), Nohara et al.
patent: 4244914 (1981-01-01), Ranalli et al.
patent: 4314963 (1982-02-01), Boden et al.
patent: 4349504 (1982-09-01), Kubat et al.
patent: 4526821 (1985-07-01), McHenry et al.
patent: 4550043 (1985-10-01), Beck
patent: 4609516 (1986-09-01), Krishnakumar et al.
patent: 4629596 (1986-12-01), Coffman

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