Rubber compounding bags and film made from syndiotactic 1,2-poly

Details Rubber compounding bags and film made from syndiotactic 1,2-poly Rubber compounding bags and film made from syndiotactic 1,2-poly

1981-10-06

1983-07-19

Dixon, Jr., William R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

206219, 2065246, 2065247, 428 35, 524526, 524571, 524313, 524284, 524394, 524399, 524435, 524441, 524445, 524449, 524451, 525237, 526335, B65D 2508, C08F 3600

Patent

active

043944736

ABSTRACT:
Bales of unvulcanized rubber, vulcanized rubber or compounding ingredients for unvulcanized rubber are packaged in film or bags made from syndiotactic 1,2-polybutadiene (1,2-SBD) containing at least one antiblock agent additive and at least one slip agent additive. Coextrusion can be used to manufacture bags or film having two or more layers where only the inside layer is heavily loaded with antiblock additives and the outside layer contains only a minimal amount of antiblock additives with both layers containing slip agents. The use of 1,2-SBD serves to eliminate the problems of incompatibility and disposal encountered in the prior art and provides film and bags having superior puncture and tear resistance when compared to a conventional material such as polyethylene.

REFERENCES:
patent: 3137683 (1964-06-01), Natta et al.
patent: 3522332 (1970-07-01), Ichikawa et al.
patent: 4110500 (1978-08-01), Evans et al.
patent: 4112158 (1978-09-01), Creekmore et al.
patent: 4248348 (1981-02-01), Butler et al.
patent: 4334615 (1982-06-01), Butler et al.

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