Coating material and film extremely excellent in barrier properties, and method for producing the same
US6306519A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1998 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Oct 16, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A vinylidene chloride copolymer film or a laminated film far more excellent in barrier properties than the conventional films provided. A vinylidene chloride copolymer film comprising 88% to 93% by weight of vinylidene chloride and 12% to 7% by weight of at least one monomer copolymerizable with vinylidene chloride and having a ratio (Q/P) of 1.5 or more, wherein Q is the integrated intensity of the peak at 2.theta.=38.degree. and P is the integrated intensity of the peak at 2.theta.=15.degree., each as determined by the wide angle X-ray reflection method, shows excellent barrier properties. Further, a laminated film comprising a base film and a vinylidene chloride copolymer layer which comprises 88% to 93% by weight of vinylidene chloride and 12% to 7% by weight of at least one monomer copolymerizable with vinylidene chloride and which has a ratio (I/J) of 1.4 or above, wherein I and J are the peak intensity and base line intensity at 2.theta.=38.degree., respectively, and a half band width of the peak at 2.theta.=38.degree. of 3.degree. or below, each as determined by the wide angle X-ray reflection method, shows excellent barrier properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.