Invention Grant
- Patent Title: Tear resistant multilayer films and articles incorporating such films
- Patent Title (中): 含有这种膜的抗撕裂多层膜和制品
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Application No.: US425911Application Date: 1995-04-20
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Publication No.: US5604019APublication Date: 1997-02-18
- Inventor: Ralph H. Bland , James M. Jonza , James D. Smith , Richard C. Allen , Jeffrey F. Bradley , Kenneth B. Smith , Bruce D. Stambaugh
- Applicant: Ralph H. Bland , James M. Jonza , James D. Smith , Richard C. Allen , Jeffrey F. Bradley , Kenneth B. Smith , Bruce D. Stambaugh
- Applicant Address: MN St. Paul
- Assignee: Minnesota Mining and Manufacturing Company
- Current Assignee: Minnesota Mining and Manufacturing Company
- Current Assignee Address: MN St. Paul
- Main IPC: B32B7/02
- IPC: B32B7/02 ; B32B17/10 ; B32B27/36 ; B32B27/08
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.
Public/Granted literature
- US4997605A Zirconia mullite/boron nitride composites Public/Granted day:1991-03-05
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