Biaxilly oriented polyamide film and its production process
US5612105A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1995 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | Jun 5, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31739
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A biaxially oriented polyamide film which has not only excellent bending pinhole resistance and excellent dimensional stability but also excellent tear linearity in the longitudinal direction of the film. More specifically, the invention provides a biaxially oriented polyamide film having a tear linearity in the longitudinal direction of the film, which includes as a main material nylon 6 and an aliphatic polyamide resin mixed in a weight ratio of from 75:25 to 99:1, wherein the difference in surface tension (dyne/cm) between the nylon 6 and the polyamide other than nylon 6 satisfies the following relationship (1) EQU 3.0.ltoreq..gamma..sub.A -.gamma..sub.B .ltoreq.15.0 (1) wherein .gamma..sub.A is a surface tension of N6 and .gamma..sub.B is a surface tension of PA.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.