Multilayered, bioriented, heat shrinkable film, method for the manufacture thereof and use thereof for packaging food products and consumer goods
US6106934A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1996 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Aug 2, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A multilayer, biaxially oriented, heat shrinkable thermoplastic film includes a layer having between 50 and 100 parts by weight ethylene/alpha-olefin C.sub.4 -C.sub.12 copolymer, and between 0 and 50 parts by weight of a polymer selected from polyolefin, and modified polyolefin, the layer having more than one melting point when detected by diffential scanning calorimetry according to ASTM D-3418; wherein the total thickness variation in the multilayer film is lower than .+-.10%, and wherein the average deviation of the multilayer film from a straight line is lower than .+-.40 mm, and wherein the sag average of the multilayer film is lower than 25 mm. A method of making the film, and a package made with the film, are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.