Dulled stretched molding and process for producing the same

Details Dulled stretched molding and process for producing the same Dulled stretched molding and process for producing the same

1990-03-26

1992-01-07

Seccuro, Carman J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521140, 525 97, 525192, 525211, 2642101, 2642107, 2643317, 2642106, 2642902, 2642888, 264 41, 5283481, C08L 5300, C08L 2314, C08L 4500, C08L 518, B29C 5502

Patent

active

050792733

ABSTRACT:
The disclosed dulled stretched molding of at most 30% in gloss value, which is useful as a general-purpose packaging material, printing paper, tracing paper, etc., is produced from a composition comprising 100 parts by weight of a propylene-ethylene lock copolymer and 3 to 40 parts by weight of a cyclopentadiene type petroleum resin having a ring and ball softening point of at least 160.degree. C. through melt extrusion thereof and stretching of the resulting flat extrudate.
There also is disclosed a heat-shrinkable foamed molding of at most 0.85 in density and at least 10% in heat shrinkability at 100.degree. C., which is useful as a packaging material, a tying material, a label material, etc. This heat-shrinkable foamed molding is produced from a composition comprising a crystalline propylene-.alpha.-olefin copolymer having a crystal melting point of at most 150.degree. C. and 5 to 40 wt. %, based on the copolymer, of a hydrogenated cyclopentadiene type resin having a ring and ball softening point of at least 160.degree. C. through melt extrusion thereof and stretching of the resulting flat extrudate.

REFERENCES:
patent: 3278646 (1966-10-01), Lambert
patent: 3663488 (1972-05-01), Kail
patent: 3773609 (1973-11-01), Haruta et al.
patent: 4230767 (1980-10-01), Isaka et al.
patent: 4869938 (1989-09-01), Usami et al.
patent: 4927885 (1990-05-01), Hayashida et al.

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