JP2006103761A - Moisture content regulated wrapper bag and moisture amount adjusted wrapper packaged with this bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wrapper bag showing a humidity adjustment effect and enabling a person to visually see the packaged content. <P>SOLUTION: This is a moisture content adjusted wrapper bag comprising an outer film, inner film and intermediate layer arranged between both layers and the intermediate layer is a moisture absorbing layer. There are provided the moisture content adjusted wrapper bag and wrapper packaged with this wrapper bag wherein (a) the inner layer of the outer wrapping film at the packaged item and the outer layer of the inner wrapping film at the outer surface are a film of polymer selected from linear low density polyethylene, low density polyethylene, an intermediate density polyethylene, high density polyethylene, EVA, EAA, EMAA, EEA, ionomer, polypropylene, their blended compounds or ethylene-buten-1 copolymer; (b) the moisture absorbing layer at the middle layer is a film with a thickness of 10μm or more while zeolite of 1 to 60 wt% and silica gel, quicklime are mixed withpolymer selected from linear low density polyethylene, polypropylene as desired; and (c) the moisture absorbing layer of an intermediate layer is a film arranged while being adhered to any one of the inner layer of the outer part or the outer layer of the inner part or both of them. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a packaging bag and a package in which an inclusion is packaged with the bag. In more detail, it is related with the packaging bag which adjusted the moisture content of the package, and the package packaged with this.

If the water content in the inclusions changes, the quality deteriorates or deteriorates, making it unusable. Various proposals for solving this problem have been made. If the packaging film is non-moisture permeable, there was a time when it was thought that the moisture did not change. However, since the synthetic resin film in practical use is a small amount, moisture permeates the moisture, so the moisture content of the inclusion changes.
The present inventor has solved this problem by making the package itself hygroscopic. In the patent invention of Japanese Patent No. 2885079, aluminum foil is used as a constituent material of a package that exhibits a humidity adjusting effect, and therefore it is difficult to see the contents from the outside.
Japanese Patent No. 2885079

  Provided is a moisture content-adjusting packaging bag that provides an excellent humidity adjustment effect and allows the state of the inclusion to be visually observed, and the inclusion in the package.

The present invention
“1. A moisture content-adjustable packaging bag comprising an exterior film, an interior film, and an intermediate layer disposed therebetween, wherein the intermediate layer is a moisture absorption layer, and a. An inner layer on the package side of the exterior film and an outer surface of the interior film The outer layer on the side is composed of linear low density polyethylene, low density polyethylene, medium density polyethylene, high density polyethylene, EVA, EAA, EMAA, EEA, ionomer, polypropylene, and blends thereof, or ethylene-butene-1 copolymer A polymer film chosen from blends,
b. The moisture absorbing layer of the intermediate layer is a film having a thickness of 10 μm or more obtained by blending a polymer selected from linear low density polyethylene and polypropylene with 1 to 60% by weight of zeolite and optionally silica gel and quicklime.
c. The moisture content adjusting packaging bag is a film in which the moisture absorbing layer of the intermediate layer is a film that is adhered to one or both of the inner layer of the exterior and the outer layer of the interior.
2. The moisture content-adjustable packaging bag according to item 1, wherein the surface area of the moisture absorbing layer film is 5% to 70% of the surface area of the outer layer film.
3. Exterior film is film of ^30g / m 2 / 1atm · day or less of water vapor permeability, water content adjustment packaging bag described in item 1 or 2, wherein.
4). The moisture content-adjusting packaging bag according to any one of claims 1 to 3, wherein the adhesion for adhering the moisture absorbing layer film to either or both of the interior film and the exterior film is heat sealing.
5. A moisture absorbing film of a certain area containing a certain amount of moisture absorbent having the required moisture absorbing property is disposed between an exterior film having a water vapor barrier property and an interior film laminated thereon, and the inner surface of the exterior film and / or the interior film. A moisture content-adjusting package that is heat-sealed and fixed to one or both of the outer layers of the package to adjust the moisture content of the inclusion to the moisture required for the package to be included. "
About.

  Since the present invention can be packaged in an appropriate state by adjusting the humidity of the inclusion, it can be preserved in a good state, preventing deterioration of the inclusion, and can be observed from the outside because it is transparent. There is an effect.

  The present invention comprises an outer layer on the outer surface side, an inner layer on the inclusion side, and a moisture absorbing layer disposed between the outer layer and the inner layer. The outer layer and the inner layer are composed of linear low density polyethylene, low density polyethylene, medium density polyethylene, high density polyethylene, EVA. , EAA, EMAA, EEA, ionomer, polypropylene, and blends thereof, or blends with ethylene-butene-1 copolymers. It is preferable because of its properties such as excellent barrier properties and mechanical strength. The hygroscopic layer is composed of a film having a thickness of 10 μm or more obtained by blending 1 to 60% by weight of zeolite as a hygroscopic agent with a polymer selected from linear low density polyethylene and polypropylene. Linear low density polyethylene and polypropylene are preferable as inner and outer layers of the moisture absorbing layer because of their low water vapor permeability. Although silica gel and quick lime may be added in addition to zeolite, it is a preferred hygroscopic agent because zeolite has good hygroscopicity.

The moisture absorption layer is melt bonded to the inner layer or the outer layer. The surface area of the hygroscopic layer is 5% to 70% of the surface property of the outer layer film. If it is 5% or less, the moisture absorption is insufficient, and if it is 70% or more, the water vapor permeability is larger than the moisture absorption.
Film forming the outer layer, water蒸透excessive must be less than ^{30g / m 2 / 1atm · day} . If it is more than this, the water vapor permeability becomes larger than moisture absorption, which is not preferable.

The moisture absorption layer film is melt bonded to the inner layer film and the outer layer film. In this state, there is an effect of absorbing permeated water vapor within a predetermined time.
The packaging bag of this invention is used suitably for the thing which receives influence of moisture, such as food and a medicine.

Example 1
The outer layer was formed with LLDPE having a thickness of 10 μm, the moisture absorption layer was formed with a 50% blend of LLDPE and zeolite with a film with a thickness of 30 μm, and the pouch was formed with a laminated film with an inner layer having a thickness of LLDPE of 10 μm. Exterior structure / water vapor transmission rate (g / m ² · d) OP / CP → 5.
The texture after 1 week is ○ (33%) Taste ○
Texture after 4 weeks ○ (32%) Taste ○
Met.

Examples 2-9
It is a moisture content adjustment packaging bag formed of a hygroscopic multilayer film having the layer structure shown in Table 1.
Comparative Examples 1-6

  It is a packaging bag having the layer structure shown in Table 1.

(note)
Example 4: OP / CP is a heat seal OP / CP.
Comparative Example 1: Since the moisture absorption layer is 10 μm or less and thin, the water absorption capacity and the water vapor entering from the exterior film cannot be balanced. The texture is not good. Taste is bad.
Comparative Example 2: Since the inner and outer layers are thick, it takes too much time for the water vapor in the package to reach the hygroscopic layer. The texture is bad. Taste is bad.
Comparative Example 3: The hygroscopic capacity of the hygroscopic layer (silica gel A) is insufficient. The texture is bad. Taste is bad.
Comparative Example 4: The ability of the moisture absorption layer is large, and more moisture than necessary is absorbed. The texture is bad. Taste is bad.
Comparative Example 5: Since the water vapor barrier property of the exterior film is insufficient, water vapor absorption cannot catch up. The texture is bad. Taste is bad.
Comparative Example 6: The seal adhesion between the inner layer (or outer layer) of the moisture-absorbing multilayer film and the inner surface of the outer film is poor, water cannot be absorbed uniformly, and the water content varies. The texture is bad. Taste is bad.

  The pouch of the present invention is preferably used for products that dislike moisture, but is widely used for products displayed in stores because it can see through the inclusions.

Claims (5)

A moisture content-adjusting packaging bag comprising an exterior film, an interior film, and an intermediate layer disposed therebetween, wherein the intermediate layer is a hygroscopic layer, comprising: a. The inner layer on the package side of the exterior film and the outer layer on the outer surface side of the interior film are linear low density polyethylene, low density polyethylene, medium density polyethylene, high density polyethylene, EVA, EAA, EMAA, EEA, ionomer, polypropylene, and the like Or a polymer film selected from a blend with ethylene-butene-1 copolymer,
b. The moisture absorbing layer of the intermediate layer is a film having a thickness of 10 μm or more obtained by blending a polymer selected from linear low density polyethylene and polypropylene with 1 to 60% by weight of zeolite and optionally silica gel and quicklime.
c. The moisture content adjusting packaging bag is a film in which the moisture absorbing layer of the intermediate layer is a film that is adhered to one or both of the inner layer of the exterior and the outer layer of the interior.   The moisture content adjusting packaging bag according to claim 1, wherein the surface area of the moisture absorbing layer film is 5% to 70% of the surface area of the outer layer film. Exterior film is film of ^30g / m 2 / 1atm · day or less of water vapor permeability, water content adjustment packaging bag according to claim 1 or 2.   The moisture content adjustment packaging bag according to any one of claims 1 to 3, wherein the adhesive for adhering the moisture absorbing layer film to either or both of the interior film and the exterior film is heat sealing.   A moisture absorbing film of a certain area containing a certain amount of moisture absorbent having the required moisture absorbing property is arranged between an exterior film having a water vapor barrier property and an interior film laminated thereon, and the inner surface of the exterior film and / or the interior film. A moisture content-adjusting package that is heat-sealed and fixed to one or both of the outer layers of the package to adjust the moisture content of the inclusion to the moisture required for the package to be included.