Methods of making improved packages
US4986053A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1989 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | May 15, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B15/08
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Sheet materials and packages capable of holding hard-to-hold products such as methyl salicylate. The preferred embodiments include a foil layer 12 and a layer 14 of EVOH between foil layer 12 and the enclosed product. A carboxy modified adhesive layer 18 is disposed between the EVOH layer 14 and the product 52. Additional layers are used in the sheet material for purposes of adhesion, appearance, protection, body, and the like. One embodiment of the invention is a coextruded film comprising the EVOH layer 514, a surface layer 516, an intervening adhesive layer 518, and a fourth covering layer 519 for covering and protecting the EVOH layer 514, especially from physical abuse. A method is disclosed wherein the sheet materials of the invention may be made into packages using fin seals 54 and lap seals 50.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.