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Stretched laminated film and bag

A surface layer and barrier layer technology, applied in the field of stretch laminated film, can solve problems such as whitening, tightness of film content, insufficient heat shrinkage, etc., and achieve reliable packaging operations, good transparency, and excellent overlapping sealability Effect

Inactive Publication Date: 2009-12-23
ASAHI KASEI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of heat shrinkage, whitening may also occur, or the heat shrinkability is insufficient, and the film is not adhered to the contents.
[0011] Therefore, the reality is that it is difficult to obtain a film that satisfies all of the above (1) to (5).

Method used

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  • Stretched laminated film and bag
  • Stretched laminated film and bag
  • Stretched laminated film and bag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～25、 comparative example 1～12

[0114] Examples 1 to 25 used the resins shown in Tables 1 to 6, Comparative Examples 1 to 12 used the resins shown in Tables 7 to 9, and used the necessary number of extruders corresponding to the number of layers, using the double film bubble inflation method Fabrication of stretch laminated films.

[0115] The ethylene-α-olefin copolymers used in Examples 3, 9, 23, 25 and Comparative Examples 1, 3, 5, 8, and 9 are ethylene-butene copolymers (density: 0.900 g / cm 3 , Melting point: 115°C, Melt index: 0.7g / 10min). The ethylene-α-olefin copolymers used in Examples 1, 2, 5-8, 10, 11, 13, 14, 16, 17, 20-22, 24, Comparative Examples 2, 6, 10-12 are ethylene- Hexene copolymer (density: 0.904g / cm 3 , Melting point: 87°C, Melt index: 2.5g / 10min). Embodiment 15, comparative example 3 use 38% by weight ethylene-hexene copolymer (density: 0.900g / cm 3 , melting point: 95°C, melt index: 4g / 10 minutes) and 60% by weight ethylene-hexene copolymer (density: 0.904g / cm 3 , melting point: 8...

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Abstract

A stretched laminated film and bag is provided, in which a packaging operation in thermal shrinkage packaging is effectively performed without the occurrence of fusion and the like between margins when sealing via heat-sealing with a margin portion of an adjacent bag in a layered state, and without of bag whitening in a thermal shrinkage process thereafter. Specifically, a stretched laminated film has at least four layers of: a surface layer (A), an adhesive layer (A), a barrier layer, and a surface layer (B) sequentially laminated in order thereof, in which the melting temperature of the surface layer (A) is only increased no less than 65 DEG C to no more than 150 DEG C higher than the melting temperature of the surface layer (B), and the barrier layer is composed of a vinylidene chloride copolymer, and the melting temperature of the barrier layer is no less than 130 DEG C to less than 160 DEG C.

Description

technical field [0001] The present invention relates to a stretch laminated film having heat shrinkability and barrier properties, and a bag using the same, which can efficiently package meat, processed meat, processed marine products, machine parts, and the like. Background technique [0002] Stretch laminated films are generally used in the packaging of meat, processed meat, processed seafood, and machine parts. The stretched laminated film is provided with functions according to the application by each layer having various properties. The properties necessary for the stretch laminated film used for heat-shrinkable packaging can be listed as follows. [0003] (1) Heat shrinkability: the property of the film to shrink under the action of heat. This property is imparted by the easily stretchable layer. When heat is applied to a product vacuum-packed with a heat-shrinkable film by spraying warm water, hot air, or a warm water bath, the film and the contents will adhere clo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/30B65D30/02B65D65/40
CPCB32B27/34B32B27/304B32B2439/46B32B27/36B32B27/08B32B27/327B32B7/12B32B27/16B32B27/18B32B27/22B32B27/306B32B27/308B32B27/32B32B2270/00B32B2307/30B32B2307/306B32B2307/31B32B2307/514B32B2307/702B32B2307/7244B32B2307/736B32B2439/06B32B2439/70B32B2553/00Y10T428/1328Y10T428/1341Y10T428/31797Y10T428/31757Y10T428/31935Y10T428/3192B32B27/30B65D65/40
Inventor 金田行正北口源启高木直树
Owner ASAHI KASEI CHEM CORP
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