Chemical product packaging film
US10450118B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2016 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Mar 31, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2471/02
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Provided is a film for packaging chemicals which does not change in appearance (e.g. yellowing), or does not generate odor, even after long-term storage; which is prevented from being scratched or contaminating rolls when the film is drawn from a roll thereof; and which expresses excellent chemical resistance. Also provided is a film for packaging chemicals which is easily detachable from a heat seal plate when contents are packed and sealed therein. The film for packaging chemicals includes polyvinyl alcohol; and a surfactant, the amount of the surfactant being 0.9% to 5% by mass based on 100% by mass of the polyvinyl alcohol, the surfactant having a polyoxyethylene structure, the number of moles of oxyethylene groups in the surfactant being 5 to 13 mol, the surfactant having a HLB of 9 to 14.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.