 Acrylic multilayer polymer powder |
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| Olefine thermoplastic elastomer sheet |
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| Coextruded chewing gum containing a soft non-SBR gum core portion |
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| Aqueous dispersion of polymer composition |
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| Viscosity index improver and method for producing the same |
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Plastic closure with compression molded sealing liner
| Details |
Inventors: Burzynski, Dennis J.;
Assignee: Owens-Illinois Closure Inc. (Toledo, OH)
Primary Examiner: Marcus; Stephen
Assistant Examiner: Stucker; Nova
Attorney, Agent or Firm:
A plastic closure comprising a base wall, a peripheral skirt, means on said skirt adapted to attach the closure to a container, and a sealing liner compression molded in situ on the interior of the base wall of the closure, said sealing liner comprising a blend of an ethylene vinyl acetate composition and a thermoplastic elastomeric composition. |
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DETAILED DESCRIPTION I claim: 1.
A plastic closure comprising a base wall, a peripheral skirt, means on said skirt adapted to attach the closure to a container, and a sealing liner compression molded in situ on the interior of the base wall of the closure, said sealing liner comprising a blend of an ethylene vinyl acetate composition and a thermoplastic elastomeric composition, said ethylene vinyl acetate composition comprises at least 70% of the liner composition, said closure operating satisfactorily on both plastic and glass containers.
2.
The closure set forth in claim 1 wherein the ethylene vinyl acetate composition comprises polyethylene as the major constituent and vinyl acetate.
3.
The closure set forth in claim 2, wherein said vinyl acetate comprises 9-15% of the ethylene vinyl acetate composition.
4.
The closure set forth in claim 3, wherein the vinyl acetate comprises 12% of the ethylene vinyl- acetate composition.
5.
The closure set forth in claim 1 wherein the ethylene vinyl acetate composition comprises about 70% to 80% and the thermoplastic elastomeric composition comprises 20% to 30%.
6.
The closure set forth in any of claims 1-5 wherein said thermoplastic elastomeric composition comprises an olefin and styrene butadiene styrene.
7.
The closure set forth in any of claims 1-5 wherein said ethylene vinyl acetate composition and said thermoplastic olefin composition comprise antioxidants and coloring pigments.
Description:
This invention relates to compression molded plastic closures and particular compression molded plastic closures having compression molded liners therein BACKGROUND AND SUMMARY OF THE INVENTION Plastic closures have been commonly made by injection molding or compression molding In plastic closures made by compression molding as shown, for example, in U.
S.
Pat.
Nos.
3,210,805, 4,434,754, and 4,418,828, incorporated herein by reference, it is also common to compression mold a sealing liner in place in the closure after the closure has been formed
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