Title:
THERMOPLASTIC PLASTIC FOOD VESSEL AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JPS59134144
Kind Code:
A
Abstract:
A thermoplastics container for receiving hot-filled food (e.g. soups and juices) consists of two body sections 101 and 103 which are friction welded together at flange 109, the body sections being made of multi-layered thermoplastics material, at least one layer of which is a barrier polymer having a low gas permeability. There are vacuum compensating means at both ends of the container. The bottom closure has a central diaphragm 111 separated from rim 110 by a pair of alternating flex-grooves 112 and 113 which allow upward flexing of the bottom closure during cooling of the food. A metal foil top seal 114 engaging over top rim 105 also has a central section which collapses inwardly into the container in response to vacuum therein. The two body sections are tapered and have indentations 116, 117 so that several same body sections can be rested during stripping without jamming. The inner and outer layers of the container wall comprise structural polymer selected from polypropylene, propylene, polyethylene, polystyrene, polyvinyl chloride and copolymers thereof, and the inner, barrier layer is selected from ethylene vinyl alcohol, polyvinyl alcohol, polyvinylidene chloride, PVC/PVdC copolymers and styrene- acrylonitrile copolymers. The friction welding may be spin welding or oscillatory welding.
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Inventors:
DONARUDO ENU MAKUROORIN
BINSENTO II FUOOTEYUNA
BINSENTO II FUOOTEYUNA
Application Number:
JP24110183A
Publication Date:
August 01, 1984
Filing Date:
December 22, 1983
Export Citation:
Assignee:
COSDEN TECHNOLOGY
International Classes:
B29C65/74; B32B1/02; B32B1/04; B32B27/28; B32B27/32; B65D1/10; B65D6/12; B65D8/00; B65D8/04; B65D8/16; B65D8/22; B65D21/02; B65D23/00; B65D81/28; B65D85/72; (IPC1-7): B32B1/04; B65D8/04
Domestic Patent References:
| JP58188831B |
Attorney, Agent or Firm:
Heiyoshi Odashima