Laminated film packages
US4273815A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1972 |
| Grant date | Jun 16, 1981 |
| Priority date | — |
| Expiry date | Mar 16, 1992 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A laminated film for packaging use which film has at least one lamina of a crystalline flexible polyvinylidene chloride film adhered to a lamina of chlorinated polyethylene film, the chlorinated polyethylene film having a chlorine of concentration of up to approximately 60%, by weight, with the particular chlorine concentration of from 30% to 50%, by weight, being preferred. The laminated film being formed by contacting a polyvinylidene chloride film while in a supercooled noncrystalline state with a chlorinated ethylene film and thereafter effecting crystallization of the polyvinylidene chloride film with substantially random crystal distribution throughout, such as, by heating the thus formed laminate to the crystallization temperature of the polyvinylidene chloride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.