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Title:
LID-MATERIAL FILM USED IN TRAY-SEAL PACKAGING METHOD, TRAY-SEAL PACKAGING METHOD, AND PRODUCTION METHOD FOR TRAY-SEAL PACKAGING
Document Type and Number:
WIPO Patent Application WO/2015/159880
Kind Code:
A1
Abstract:
The issue of lid-material film breaking is solved by a lid-material film that is used in a tray-seal packaging method wherein a tray filled with packaging contents and the lid-material film arranged above the tray are conveyed in synchronization, the lid-material film is punched out along the outer circumference of a tray opening edge, and the opening edge is heat sealed. The film comprises a base material layer and a sealant layer and has a thickness of less than 30 µm. The base material layer has a layer having, as the main component thereof, polypropylene, polyamide, polyester, or a saponification product of an ethylene-vinyl acetate copolymer. The sealant layer has as the main component thereof a straight-chain, low-density polyethylene having a density of 913-929 kg/m3.

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Inventors:
SAKAUCHI KUNIO (JP)
ISHIDA SHOJIRO (JP)
Application Number:
PCT/JP2015/061464
Publication Date:
October 22, 2015
Filing Date:
April 14, 2015
Export Citation:
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Assignee:
OKURA INDUSTRIAL CO LTD (JP)
International Classes:
B65D65/40; B32B27/32; B65B7/28; B65D77/20
Foreign References:
JP2011178160A2011-09-15
JP2006168736A2006-06-29
JPH05104630A1993-04-27
JPH05294357A1993-11-09
JP2007062828A2007-03-15
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