Film laminate with easy TD tear
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United States of America Patent
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-
Dec 8, 1992
Issued Date -
N/A
app pub date -
Nov 1, 1991
filing date -
Dec 5, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A transversely tearable film and pouches made therefrom are disclosed. The transversely tearable laminate comprises a machine direction oriented linear low density polyethylene film adhesively laminated on at least one side to a sealant film, the sealant film having an Elmendorf tear in the machine direction of at least about 2 g/.mu.m, and the selection of said oriented film and said sealant film being made on the basis that: K.X>(1-Y), wherein K is an empirically determined factor which depends of the properties of the oriented film and the sealant film, X is the thickness of all layers of sealant film in micrometers, Y=(MD.sub.c)/(TD.sub.c) MD.sub.c is the Elmendorf tear strength, in the machine direction, of the oriented film, measured in grams, and TD.sub.c is the Elmendorf tear strength, in the transverse direction, of the oriented film, measured in grams.
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