Stock material or miscellaneous articles – Composite – Of polyester
Patent
1992-10-01
2000-03-21
Yamnitzky, Marie
Stock material or miscellaneous articles
Composite
Of polyester
428458, 428483, 428 34, 428430, B32B 2736
Patent
active
060400617
ABSTRACT:
A tear resistant film comprises at least three layers situated one on the other in a parallel array. The layers are individually selected from a stiff polyester or copolyester, a ductile sebacic acid based copolyester, and optionally, an intermediate material. 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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Bland Ralph H.
Bradley Jeffrey F.
Jonza James M.
Smith James D.
Smith Kenneth B.
3M Innovative Properties Company
Skolnick Steven E.
Yamnitzky Marie
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