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Tear resistant peelable seal for containers

A sealing and tear-resistant technology, applied in the field of containers, can solve problems such as impermeability

Active Publication Date: 2006-12-13
DUPONT TEIJING FILMS U S LLP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These problems are all the more vexing when the resulting web exhibits the desired properties of satisfactorily high tear resistance and impermeability to moisture or water

Method used

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  • Tear resistant peelable seal for containers
  • Tear resistant peelable seal for containers
  • Tear resistant peelable seal for containers

Examples

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Embodiment Construction

[0031] The present invention will be described below with reference to the accompanying drawings, in which like numerals indicate like parts. The drawings provided are illustrations and explanations of the invention and are therefore not drawn to scale and are not intended to be engineering drawings for manufacturing purposes. As such, certain components are exaggerated and components not required for an understanding of the invention are not shown or are only partially shown.

[0032] Referring now to Figure 1, there is shown a tear resistant seal or lid structure 10 of the present invention. The seal consists of at least three layers. Additional layers may exist above or below the three layers shown, but they are not shown as this is not essential to explain the invention. The three layers forming the tear resistant portion of the seal are the top layer 12 , the adhesive layer 18 and the reinforcing scrim layer 20 .

[0033] The top layer 12 is an oriented polymer film la...

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Abstract

A tear resistant seal made from a recyclable multilayer structure that consists of an oriented polymer film layer a thermal bonding polymer layer on the oriented polymer layer inner surface substantially coextensive thereto, and a reinforcing scrim polymer layer also having an inner surface adjacent and substantially coextensive with the thermal bonding polymer layer. The polymer film layer and the bonding polymer layer are co-extruded layers having a chemical composition that permits recycling without separating the layers. The scrim layer also has a similar chemical composition, permitting recycling following lamination, thereby permitting the recovery of waste material during production runs by the simple recycling of the complete laminated structure.

Description

technical field [0001] The present invention relates to containers and more particularly to tear resistant peelable closures employing recyclable multilayer construction. [0002] Cross References to Related Applications [0003] This application is a continuation-in-part of US Patent Application Serial No. 10 / 300,352, filed November 20, 2002, the entire contents of which are hereby incorporated by reference. Background technique [0004] Sheets of multilayer materials have been used to make seals to seal container openings from air and contaminants. A typical sealing material consists of a sheet of metal foil with a layer of heat-sealable material to bond the foil to the lip of a container, such as a plastic pan-type food seal package, bottle, or rigid foam seal package (blister package). When used to seal bottles, the seal is typically die cut from a sheet of multilayer material and heated to seal the lip of the container. When the container is a rigid foam-sealed pack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/12B32B27/36B32B27/12A61L27/54A61L29/16A61L31/16B32B5/02B32B7/10
CPCY10T428/1359Y10T442/124B32B27/12Y10T428/28B32B27/36B32B5/02B32B7/10Y10T442/674Y10T428/31565B32B7/12Y10T442/126Y10T428/31569Y10T428/1362B32B27/08B65D41/18B32B2307/518B32B2581/00B32B2307/5825B32B2272/00B32B2367/00
Inventor 史蒂文·R.·克森蒂诺斯蒂芬·K.·弗朗兹舍恩
Owner DUPONT TEIJING FILMS U S LLP