Laminate film and packaging bag using same
US10639871B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2015 |
| Grant date | May 5, 2020 |
| Priority date | — |
| Expiry date | Sep 26, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2423/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A laminate film (30) of the present invention includes a heat sealing layer (10) composed of a resin composition including, with respect to 20 to 95 parts by weight of a propylene-based polymer (A) having a melting point (Tm) of equal to or higher than 120° C. and equal to or lower than 170° C. as measured by differential scanning calorimetry (DSC), a total of 5 to 80 parts by weight of two or more kinds of copolymers selected from the group consisting of a propylene.1-butene copolymer (B) containing a unit derived from propylene in an amount of 51 to 95 mol % and a unit derived from 1-butene in an amount of 5 to 49 mol %, wherein the total of the unit derived from propylene and the unit derived from 1-butene is 100 mol %, a copolymer (C) of ethylene and an α-olefin having 3 to 20 carbon atoms, and a copolymer (D) of 1-butene and an α-olefin having 3 carbon atoms or 5 to 20 carbon atoms containing a constitutional unit derived from 1-butene in an amount of 50 to 99 mol % and a constitutional unit derived from an α-olefin having 3 carbon atoms or 5 to 20 carbon atoms in an amount of 1 to 50 mol %, wherein the total of the unit derived from 1-butene and the unit derived from the α-ol…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.