Two-layered packaging material for foodstuffs one layer of which comprises a polymer blend
US4525418A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1982 |
| Grant date | Jun 25, 1985 |
| Priority date | — |
| Expiry date | Nov 26, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2525
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
What is disclosed is a two-layered packaging material for the direct contact packing of food products, said material comprising cloth coated with a first acrylate emulsion polymer, formulated to be soft, comprising: PA1 (a) at least 90 weight percent, based on the total first polymer, of a lipophilic monomer component comprising an ester of acrylic acid and/or of methacrylic acid with a lower alkanol, and from 0 to 10 weight percent, based on said lipophilic component, of a further comonomer, the methyl methacrylate content of said lipophilic component not exceeding 40 weight percent of said total first polymer; PA1 (b) a hydrophilic monomer component having acidic properties, in an amount from 0 to 5 weight percent, based on the total first polymer; and PA1 (c) a crosslinking monomer component, in an amount from 0 to 7 weight percent, based on the total first polymer. The emulsion polymer may be used in combination with a second emulsion polymer which is an acrylic resin formulated to be harder than said first polymer, and/or with a third emulsion polymer which acts as a drying agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.