Sealant film, multilayer film using same and packaging bag

一种密封剂、多层膜的技术，应用在包装袋,多层膜领域，能够解决透过多层膜透过率降低、内容物内容物质量劣化等问题，达到低吸附性优异、充分低温密封性和密封强度的效果

Active Publication Date: 2019-03-15
TOPPAN INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in order to suppress the deterioration of the contents due to oxygen, the reduction of the contents due to the outward dissipation of the contents, etc., a gas barrier film may be further laminated, or a gas barrier property may be imparted to the base sheet, thereby Reduce the transmittance through the multilayer film
[0003] On the other hand, the contents (particularly drug ingredients, fragrance ingredients, etc.) are adsorbed or absorbed to the sealant film (particularly polyolefin film, etc.) in contact with the contents, thereby disadvantageously reducing the amount of the contents or Deterioration of the quality of the contents (for example, see Japanese Patent Laid-Open No. 2015-137130 (Patent Document 1))

Method used

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  • Sealant film, multilayer film using same and packaging bag
  • Sealant film, multilayer film using same and packaging bag
  • Sealant film, multilayer film using same and packaging bag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0072] refer to figure 1, the sealant film 1 of the present embodiment is a sealant film made of two layers of a polyolefin layer 11 (on the substrate sheet side) and a polycycloolefin layer 12 (on the sealing side).

[0073] (polyolefin layer: on the substrate sheet side)

[0074] The polyolefin layer 11 contains polyolefin as a main component. The expression "contains as a main component" means, for example, that the content of polyolefin is more than 50% by mass with respect to the total amount of polyolefin layer 11, and the content of polyolefin is preferably 80% by mass or more, more preferably 90% by mass or more (same below).

[0075] As the polyolefin, polyethylene can be suitably used. As the polyethylene, for example, low-density polyethylene (LDPE) or linear low-density polyethylene (LLDPE) can be suitably used.

[0076] (Polycycloolefin layer: on the sealing side)

[0077] The polycycloolefin layer 12 contains polycycloolefin as a main component. Other polym...

Embodiment approach 2

[0097] refer to figure 2 , the sealant film of this embodiment is the same as the sealant film of Embodiment 1, except that a polyolefin and polycycloolefin blend resin is provided between the polyolefin layer 11 and the polycycloolefin layer 12. The blended layer 13.

[0098] Preferably, the blend layer 13 is obtained by recycling the polycycloolefin material produced when both ends of the elongated polycycloolefin layer 12 are cut by trimming during production. In other words, the blend layer 13 is preferably composed of a blended resin of recycled polycycloolefin and polyolefin.

[0099] By providing such a blend layer 13 , even when the thickness of the polycycloolefin layer 12 becomes thinner, the same effect can be obtained compared with the case where there is no blend layer 13 . Therefore, the raw material cost of polycycloolefin which is a relatively expensive material can be reduced.

[0100]

Embodiment approach 3

[0102] refer to image 3 , The multilayer film 2 (packaging material) of the present embodiment is a multilayer film obtained by sequentially laminating the sealant film 1 of Embodiment 1, the adhesive layer 41 and the base material sheet 31 .

[0103] As the base material sheet 31, the constituent material is not particularly limited, but a plastic film, paper, nonwoven fabric, etc. can be used as long as it has mechanical strength and dimensional stability. Examples of constituent materials of the plastic film include polyesters such as polyethylene terephthalate (PET) or polyethylene naphthalate, polyolefins such as polypropylene, polystyrene, such as 6- Polyamides such as nylon, polycarbonate, polyacrylonitrile and polyimide. The plastic film is preferably a biaxially stretched film. In the present embodiment, the base material sheet 31 is a PET film.

[0104] As the adhesive constituting the adhesive layer 41 , the constituent material is not particularly limited, but ...

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Abstract

A sealant film which is provided with: a polyolefin layer that contains a polyolefin as a main component; and a polycycloolefin layer that serves as the outermost layer, while containing a polycycloolefin as a main component. The polycycloolefin comprises two or more structural units selected from among a structural unit (A) derived from a dicyclopentadiene compound, a structural unit (B) derivedfrom a tetracyclododecene compound and a structural unit (C) derived from a norbornene compound; and the polycycloolefin has a glass transition temperature of 80 DEG C or less.

Description

technical field [0001] The present invention relates to a sealant film, a multilayer film comprising the sealant film, and a packaging bag. Background technique [0002] Conventionally, as a packaging container for storing contents such as food, drink, or medicine, for example, a packaging bag composed of a multilayer film by laminating resin films or paper is widely used. A substrate sheet and a sealant film are formed. In addition, in order to suppress the deterioration of the contents due to oxygen, the reduction of the contents due to the outward dissipation of the contents, etc., a gas barrier film may be further laminated, or a gas barrier property may be imparted to the base sheet, thereby Reduce the transmittance through the multilayer film. [0003] On the other hand, the contents (particularly drug ingredients, fragrance ingredients, etc.) are adsorbed or absorbed to the sealant film (particularly polyolefin film, etc.) in contact with the contents, thereby disad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/00B65D65/40B65D81/24
CPCB32B27/00B32B27/32B65D65/40B65D81/24B32B27/08B32B27/325B32B2439/70B32B2439/80B32B2439/06B32B27/36B32B2270/00B32B7/12B32B2255/10B32B2255/26B32B2307/732B32B2307/30B32B2307/31B32B2307/7242B32B2307/7244B32B2323/046B32B2329/04B32B2553/00C08L23/06C08L45/00C08L2203/162
Inventor 矢岛俊辅吉永雅信
Owner TOPPAN INC
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