Process for the manufacture of disposable food contact compatible microwaveable containers having at least one micronodular surface
US6719943B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2000 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | May 18, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31855
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disposable food contact compatible microwaveable containers having one or more micronodular surface are disclosed. These containers, including plates, bowls, cups, trays, buckets, soufflé dishes, and lids are prepared from a polyolefin selected from the group consisting of polypropylene, polypropylene polyethylene copolymer or blends, and mixtures of these, mica, and pigment and are thermoformed into the shape of a the aforementioned containers exhibiting (a) a micronodular surface on at least one side of the surface; (b) a melting point of not less than about 250° F.; said containers being dimensionally stable and resistant to grease, sugar, and water at temperatures up to at least 250° F. and being of sufficient toughness to resist cutting by serrated polystyrene flatware.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.