Easily tearable film, multilayer film, packaging material, and container
US11873401B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2018 |
| Grant date | Jan 16, 2024 |
| Priority date | — |
| Expiry date | Aug 28, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/025
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An easily tearable film with excellent linear cuttability, as well as a multilayer film, a packaging material, and a container are provided. The easily tearable film is a polyamide resin film including polyamide resin components including more than 20 parts by mass and 70 parts by mass or less of a semi-aromatic polyamide resin A and less than 80 parts by mass and 30 parts by mass or more of an aliphatic polyamide resin B; wherein the semi-aromatic polyamide resin A is constituted of a diamine-derived constituent unit and a dicarboxylic acid-derived constituent unit; 60 mol % or more of the diamine-derived constituent units are derived from metaxylylenediamine; 60 mol % or more of the dicarboxylic acid-derived constituent units are derived from an α,ω-linear aliphatic dicarboxylic acid having from 4 to 10 carbons; and the polyamide resin film is stretched, the polyamide resin film having an area fraction corresponding to the semi-aromatic polyamide resin A, as observed in secondary electron image observation, of 9.8% or more after plane ion milling of a cross section of the polyamide resin film in the TD direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.