Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...
Patent
1994-05-27
1995-06-27
Zirker, Daniel R.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including components having same physical characteristic in...
428215, 428216, 428354, 428480, 428483, 428515, 428910, 428 40, B32B 2708, B32B 712
Patent
active
054278422
ABSTRACT:
A tear resistant film comprises more than five layers situated one on the other in a parallel array. The layers are individually selected from a stiff polyester or copolyester, a ductile polymeric material, and optionally, an intermediate material. The stiff polyester or copolyester is oriented in at least one direction. Tear resistance may be measured in a Graves area test and reflects the ability of the film to absorb energy. The films of the invention are useful in many articles including security control laminates for glazing members.
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Allen Richard C.
Bland Ralph H.
Bradley Jeffrey F.
Jonza James M.
Smith James D.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Skolnick Steven E.
Zirker Daniel R.
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