Anti-bacterial film suitable for food packaging
US5929133A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Jul 21, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Anti-bacterial film according to the present invention is suitable for use as food packaging wrap, and is given with the properties required for such film, such as a clinging property, transparency, and an anti-fogging property, as well as a high anti-bacterial property. The anti-bacterial film according to the present invention comprises, for 100 weight parts of PVC resin, 5 to 50 weight parts of a plasticizer, 0.3 to 3.0 weight parts of a stabilizer, 0.02 to 1.0 weight parts of hydrotalcite, 0.5 to 5.0 weight parts of an anti-fogging agent, and 0.02 to 2.0 weight parts of an anti-bacterial compound. The anti-bacterial compound may consist of a compound obtained by ion exchanging metallic ions of inorganic oxo-acid salt in the form of irregular particles having a particle diameter no more than 0.5 .mu.m with metallic ions having an anti-bacterial property, or a compound obtained by physically or chemically attaching metallic components having an anti-bacterial property to colloidal particles of inorganic oxides such as SiO.sub.2, TiO.sub.2, SiO.sub.2.Al.sub.2 O.sub.3 and SiO.sub.2.B.sub.2 O.sub.3 having a particle diameter no more than 500 nm and forming a colloidal solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.