Film for heat sealing and process of heat sealing
Patent 4302554 Issued on November 24, 1981. Estimated Expiration Date: 
November 24, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 24, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsAssigneeApplicationNo. 05/946724 filed on 09/28/1978US Classes:525/71, Contains two or more graft or graft-type copolymers or a graft or a graft type copolymer and at least one block or block-type copolymer156/69, Application of end closures to containers428/462, Including polyene monomers (e.g., butadiene, etc.)428/513, Monoethylenically unsaturated525/89, Mixture contains two or more solid block or block-type copolymers525/98Solid block or block-type copolymer derived from reactant containing plural unsaturationExaminersPrimary: Michl, Paul R.Attorney, Agent or FirmInternational ClassesB32B 27/28 (20060101)C08L 53/00 (20060101) C08L 53/02 (20060101) C09D 153/00 (20060101) C09D 153/02 (20060101) Foreign Application Priority Data1978-06-29 JPAbstractA film and a laminate using the film as a substrate which both are suitable for heat sealing and a process for heat sealing the film and the laminate are disclosed. The film comprises a blend of (I) at least one member selected from the group consisting of (A) elastomeric block copolymers of vinyl-aromatic compounds with conjugated diene compounds, (B) resinous block copolymers of vinyl-aromatic compounds with conjugated diene compounds and (C) vinyl-aromatic resins and/or modified vinyl-aromatic resins, and (II) an olefinic polymer.Field of SearchMixture contains solid polymer derived from nonaromatic reactant containing plural ethylenically unsaturated groupsMixing of solid block or block-type copolymer with other solid polymer; mixing of said polymer mixture with a chemical treating agent; mixing of a block or block-type copolymer with SICP or with SPFI; or processes of forming or reacting; or the resultant product of any of the above operations Mixture contains two or more solid block or block-type copolymers Mixture contains solid block or block-type copolymer derived from ethylenically unsaturated hydrocarbon reactants only at least one of which contains at least four carbon atoms Solid block or block-type copolymer derived from reactant containing plural unsaturation Solid polymer derived from ethylene or propylene Contains two or more graft or graft-type copolymers or a graft or a graft type copolymer and at least one block or block-type copolymer | |
