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US 6,543,208 B1Granted
Food-packaging bag, method of food packaging, and use of laminated film as food-packaging bag
AssigneeIshida Co., Ltd.
InventorsYukio Kobayashi, Hirotsugu Mori, Yoshio Iwasaki
Life of this patent
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Abstract
The present invention provides a bag for packaging food products whose materials can be easily recycled. A bag for packaging food products is formed of a laminated film having a structure of polyester-type sealant layer with a low melting, point/barrier layer (vapor-deposited layer of ceramic or metal)/polyester-type heat resistant layer with a high melting point. The bag is formed by heat sealing the film such that the polyester-type low melting point sealant layer forms an inner side.
Claims20
A bag for packaging foods comprising:
- a heat-sealed laminated film consisting essentially of:
- polyester-type low melting point sealant layer;
- a barrier layer having barrier properties against oxygen and water vapor;
- and
- a polyester-type high melting point heat resistant layer, said polyester-type low melting point sealant layer forms an inner side of said bag.
2 more elements
A method of packaging food products, comprising:
- a back sealing process in which a laminated film that consists essentially of:
- a polyester-type low melting point sealant layer;
- a barrier layer having barrier properties against oxygen and water vapor;
- and
- a polyester-type high melting point heat resistant layer, is formed into a tubular shape such that said polyester-type low melting point sealant layer forms an inner side, and overlapping back portions are back sealed;
- a food products inserting process in which food products are inserted into said tubular laminated film;
- and
- a side sealing process in which both ends of said back sealed laminated film are sealed.
5 more elements
Dependencies are inferred from the claim text.