Unlock instant, AI-driven research and patent intelligence for your innovation.

Sealant film, multilayer film including same and packaging bag

a multi-layer film and sealing film technology, applied in the direction of packaging foodstuffs, packaging goods, containers preventing decay, etc., can solve the problems of deteriorating quality and decreasing the amount of contents, and achieve the effect of sufficient low-temperature sealing property, excellent or even excellent low-adsorption properties

Inactive Publication Date: 2019-05-23
TOPPAN PRINTING CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a sealant film that has good barrier properties, can seal at low temperatures, and has strong sealing strength.

Problems solved by technology

On the other hand, contents (in particular, medicinal ingredient, fragrance ingredient, etc.) are adsorbed to or absorbed in a sealant film (in particular, polyolefin film or the like) that is in contact with the contents, unfortunately decreasing the amount of the contents or deteriorating the quality thereof (See, for example, Japanese Patent Laying-Open No. 2015-137130 (PTL 1)).

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sealant film, multilayer film including same and packaging bag
  • Sealant film, multilayer film including same and packaging bag
  • Sealant film, multilayer film including same and packaging bag

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0064]Referring to FIG. 1, a sealant film 1 of this embodiment is a sealant film made of two layers of a polyolefin layer 11 (on the base sheet side) and a polycycloolefin layer 12 (on the seal side).

[0065](Polyolefin Layer: On Base Sheet Side)

[0066]Polyolefin layer 11 contains polyolefin as a main ingredient. The phrase “contains as a main ingredient” means, for example, that the content amount of polyolefin is greater than 50% by mass relative to the total amount of polyolefin layer 11, and the content amount of polyolefin is preferably greater than or equal to 80% by mass, more preferably greater than or equal to 90% by mass (the same hereinafter).

[0067]As the polyolefin, polyethylene can be suitably used. As the polyethylene, for example, a low density polyethylene (LDPE) or linear low density polyethylene (LLDPE) can be suitably used.

[0068](Polycycloolefin Layer: On Seal Side)

[0069]Polycycloolefin layer 12 contains polycycloolefin as a main ingredient. Other polymer materials, ...

embodiment 2

[0088]Referring to FIG. 2, the sealant film of this embodiment is the same as that of embodiment 1, except that a blend layer 13 made of a blend resin of polyolefin and polycycloolefin is provided between polyolefin layer 11 and polycycloolefin layer 12.

[0089]It is preferable that blend layer 13 be obtained by recycling a polycycloolefin material derived when both ends of elongated polycycloolefin layer 12 are cut by trimming during production, etc. In other words, blend layer 13 is preferably composed of a blend resin of recycled polycycloolefin and polyolefin.

[0090]The same effect can be obtained by providing such blend layer 13, even when the thickness of polycycloolefin layer 12 is made thinner as compared to a case where there is no blend layer 13. Accordingly, the raw material cost of polycycloolefin that is a relatively expensive material can be reduced.

Multilayer Film I

embodiment 3

[0091]Referring to FIG. 3, a multilayer film 2 (packaging material) of this embodiment is a multilayer film obtained by stacking sealant film 1 of embodiment 1, an adhesive layer 41 and a base sheet31 in this order.

[0092]As base sheet 31, the constituent material is not particularly limited, but plastic film, paper, nonwoven fabric or the like can be used, as long as it has mechanical strength and dimensional stability. Examples of the constituent material of the plastic film include polyester such as polyethylene terephthalate (PET) or polyethylene naphthalate, polyolefin such as polypropylene, polystyrene, polyamide such as 6-nylon, polycarbonate, polyacrylonitrile, and polyimide. The plastic film is preferably a biaxially stretched film. In this embodiment, base sheet 31 is a PET film.

[0093]As an adhesive constituting adhesive layer 41, the constituent material is not particularly limited, but an adhesive for dry lamination can be suitably used. Examples of the adhesive for dry l...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A sealant film including a polyolefin layer containing polyolefin as a main ingredient, and a polycycloolefin layer as an outermost layer containing polycycloolefin as a main ingredient. The polycycloolefin contains two or more kinds of structural units selected from a structural unit (A) derived from a dicyclopentadiene compound, a structural unit (B) derived from a tetracyclododecene compound, and a structural unit (C) derived from a norbornene compound, and the polycycloolefin has a glass transition temperature less than or equal to 80° C.

Description

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS[0001]This application is a continuation application filed under 35 U.S.C. § 111(a) claiming the benefit under 35 U.S.C. §§ 120 and 365(c) of International Patent Application No. PCT / JP2017 / 025776, filed on Jul. 14, 2017, which is based upon and claims the benefit of priority to Japanese Patent Application Nos. 2016-142373, filed on Jul. 20, 2016, 2016-212817, filed on Oct. 31, 2016, and 2016-212818, filed on Oct. 31, 2016; the disclosures of which are all incorporated herein by reference in their entireties.TECHNICAL FIELD[0002]The present invention relates to a sealant film, a multilayer film including the same, and a packaging bag.BACKGROUND ART[0003]Conventionally, as a packaging container for storing contents such as food, beverage or medicine, for example, a packaging bag composed of a multilayer film formed by stacking a base sheet made of a resin film or paper and a sealant film has been widely used. Furthermore, in order to supp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): B32B27/08B32B27/32B32B27/36C08L23/06C08L45/00
CPCB32B27/08B32B27/325B32B27/36C08L23/06C08L45/00B32B2307/7244B32B2307/732B32B2329/04B32B2323/046B32B2553/00C08L2203/162B32B27/00B32B27/32B65D65/40B65D81/24B32B2439/70B32B2439/80B32B2439/06B32B2270/00B32B7/12B32B2255/10B32B2255/26B32B2307/30B32B2307/31B32B2307/7242
Inventor YAJIMA, SHUNSUKEYOSHINAGA, MASANOBU
Owner TOPPAN PRINTING CO LTD