Paper-like butene-1 polymer compositions

Details Paper-like butene-1 polymer compositions Paper-like butene-1 polymer compositions

1980-09-18

1982-11-16

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428143, 428147, 428148, 428149, 428195, 428338, 428523, 428910, B32B 310, B32B 326, B32B 500

Patent

active

043594972

ABSTRACT:
A paper like butene-1 polymer sheet material is made by extruding a composition comprising (a) about 20 to 97% by weight of a butene-1 polymer having a molecular weight in excess of about 20,000, an isotacticity of at least about 25% and a butene-1 content of at least about 50% by weight, and (b) about 3 to 80% by weight of at least one normally solid filler insoluble in said polymer, to form a sheet, and stretching said sheet at least about 5% beyond its yield strain. The filler may be organic or inorganic and the sheet is preferably stretched at least about 20% beyond its yield point. The sheet is characterized by a novel surface appearance when scanned in an electron microscope, by dimensional stability and by approximately equal strengths in all directions as evidenced by a maximum tensile strength ratio of about 13:1 in mutually perpendicular directions.

REFERENCES:
patent: 3551194 (1970-12-01), Shepherd et al.
patent: 3634564 (1972-01-01), Okamoto et al.
patent: 3738904 (1973-06-01), Ikeda et al.
patent: 3765999 (1973-10-01), Toyoda
patent: 3783088 (1974-01-01), Yoshiyasu et al.
patent: 3841943 (1974-10-01), Takashi et al.

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