Method of producing laminated packaging material
US5804300A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31667
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In the production of a laminated packaging material formed of a laminate comprising a base film, a silicon oxide layer and a sealing medium layer, the sealing medium layer is formed by laminating a thermoplastic resin to the silicon oxide layer by extrusion coating in a thickness of 30 .mu.m or less. At this time, in addition to the thermoplastic resin layer formed by extrusion coating, an additional thermoplastic resin film may be laminated to its outside so that they are put together to form a layer serving as the sealing medium layer. In this case, lamination is carried out to extrude a thermoplastic resin between the silicon oxide layer and the thermoplastic resin film in a layer thickness of 30 .mu.m or less. In a lengthwise pillow type laminated packaging material formed of a laminate comprising a sealing medium layer, a base film and a silicon oxide layer, a thermoplastic resin layer and an outer substrate are further laminated outside the silicon oxide layer at the same time the thermoplastic resin layer is formed, by extruding a thermoplastic resin between the outer substrate and the silicon oxide layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.