Plastic closure with compression molded sealing liner

• US 5,306,542 A
• Filed: 02/11/1993
• Issued: 04/26/1994
• Est. Priority Date: 02/11/1993
• Status: Expired due to Term

• Current Assignee: Berry Plastics Corporation (Berry Global Group Inc.)
• Original Assignee: Owens-Illinois Closure, Inc.
• Inventors: Bayer, John W.
• Primary Examiner(s): Ryan, Patrick J.
• Assistant Examiner(s): YAMNITZKY, MARIE ROSE
• Application Number:
  US08/016,356
• Time in Patent Office: 439 Days
• Field of Search: 215/349, 215/350, 215/341, 215/DIG. 2, 428/192, 428/411.1, 428/474.4, 428/475.8, 428/500
• US Class Current: 428/192
• CPC Class Codes: B32B 2439/40 Closed containers
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/28 comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
• CPC Class Codes: B32B 27/306 comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: Y10S 215/02 Coatings and laminations for making of bottle caps
• CPC Class Codes: Y10T 428/24777 Edge feature
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]
• CPC Class Codes: Y10T 428/31725 Of polyamide
• CPC Class Codes: Y10T 428/31743 Next to addition polymer from unsaturated monomer[s]
• CPC Class Codes: Y10T 428/31855 Of addition polymer from unsaturated monomers

Abstract

A plastic closure including a base wall having an inner surface, a peripheral skirt extending from the base wall and a liner on the inner surface of the base wall. The liner includes (a) an ethylene vinyl acetate composition, (b) a primary fatty acid amide and (c) a bis-fatty acid amide. Preferably the primary fatty acid amide comprises an oleamide or an erucamide, and the bis-fatty acid amide comprises ethylene-bis-stearamide.

Claims

1. A plastic closure comprising

a base wall having an inner surface,

a peripheral skirt extending from said base wall, and

a liner compression molded on said inner surface of said base wall,

said liner comprising

(a) ethylene vinyl acetate composition,

(b) a primary fatty acid amide selected from the group consisting of an oleamide and an erucamide,

(c) a bis-fatty acid amide,

the total amount of primary fatty acid amide and bis-fatty acid amide being about 0.5%-1.5% by weight based on the weight of the ethylene vinyl acetate,

the ethylene vinyl acetate comprising about 85%-94% by weight of polyethylene and about 6%-15% by weight of vinyl acetate,

the ratio of primary fatty acid amide to bis-fatty acid amide ranges between 25:

75 and 75;

25, by weight.

2. The closure set forth in claim 1 wherein said bis-fatty acid amide is selected from the group consisting of ethylene-bis-oleamide and ethylene-bis-stearamide.