Multi-layer construction film
US5300354A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1992 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | Mar 20, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3192
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A multi-layer construction film comprising at least one layer (A) of ethylene-vinyl alcohol copolymer and having an ethylene content of 20-60 mol %, and a melt index of .eta. Eg/10 min., at least one adhesive resin layer (B) of ethylene polymer and having a melt index of .eta. Ag/10 min. and density of not more than 0.90 g/cm.sup.3, and a plastic film (C) wherein the layer (B) is laminated adjacent to the plastic film (C), which satisfies the following formulas. EQU 0.5 .mu.m.ltoreq.a.ltoreq.20 .mu.m (1) EQU 0.5 .mu.m.ltoreq.b'.ltoreq.20 .mu.m (2) EQU 1 .mu.m.ltoreq.a+b.ltoreq.30 .mu.m (3) EQU 0.08.ltoreq..eta. E/.eta. A.ltoreq.8 (4) wherein a is the thickness of the entire layer (A), b is the thickness of the entire layer (B), and b' is the thickness of one layer of layer (B), and a method for producing same. The multi-layer construction film of the present invention has gas barrier properties, flex resistance, and resistance to boiling, and does not yellow at ultraviolet rays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.