JP2003137302A - Deoxidizing film bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a film bag which has oxygen barrier properties against the open air and oxygen absorbability for a packaged object, prevents the object from dropping in quality due to oxidation, allows a check of mixing metal pieces by a metal detector on a filling line, is rich in transparency, can be put in a microwave oven, is rich in flexing resistance, and is free from fear of generating dioxin when incinerated for disposal. SOLUTION: An oxygen absorbing layer 2 is tensionally attached to an internal surface of a dechlorinating oxygen barrier layer 1. A sealant layer 3 is tensionally attached to an internal surface of the oxygen absorbing layer 2. The sealant layer 3 is butt-welded to form a dechlorinating transparent packaging bag 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin packaging bag having an oxygen barrier property against the outside air and an internal oxygen absorbing property.

[0002]

2. Description of the Related Art Conventionally, a synthetic resin packaging bag has been used in which an aluminum foil and various biaxially stretched films are laminated with a PVDC coating, a silicon oxide vapor deposition, and an oxygen barrier layer vapor-deposited with aluminum oxide. However, according to the aluminum foil bonding, the metal contamination detection device cannot be used in the filling line, it is not transparent and cannot be placed in a microwave oven as a package, and the PVDC coating is a source of dioxin at the time of waste incineration and has many problems.

The vapor barrier property of aluminum oxide (alumina) vapor-deposited on a PET film is insufficient.

The silicon oxide vapor-deposited film is excellent in gas barrier property, but is insufficient in transparency and bending resistance (resistance to pinhole generation in the gas barrier layer due to bending).

[0005]

DISCLOSURE OF THE INVENTION The present invention has an oxygen barrier property with respect to the outside air and an oxygen absorption property with respect to a packaged object,
It can prevent the deterioration of the quality of the packaged product due to oxidation, and can also add some transparency. It can inspect the metal fragments mixed with a metal detector, can be placed in a microwave oven, and has excellent bending resistance. The purpose is to obtain a film bag that is rich and does not generate dioxin when incinerated.

[0006]

To achieve the above object, the present invention provides a film bag with a chlorine-free oxygen barrier layer, the barrier layer comprising an oxygen barrier polymer comprising acrylic acid or a modified product thereof. Formed by a coated organic gas barrier film, an oxygen absorbing layer made of a polyolefin film in which an oxygen absorbent is kneaded is adhered to the inner surface of the oxygen barrier layer, a sealant layer is applied to the innermost layer, and the innermost layer is applied. A deoxygenation film bag formed by collision welding to form a non-chlorine-containing packaging bag, the oxygen barrier layer having a window-shaped lacking portion or the like attached to the entire surface or a part of the oxygen barrier layer. 1 The deoxidizing film bag and the film bag according to the invention are openable and closable sealed bags formed by fitting and separating a female strip and a male strip on the opening-side facing surface, and the inside of the bag and the opening at the tip of the male strip. The ridge toward the forming comprises protrusion width opening side protrusion than the bag inner ridge is deoxygenated film bag according to the first or second invention is greater, by.

[0007] Therefore, when the retort-treated food and the boiled sterilized food are hermetically packaged and stored in the film bag, oxygen from the outside air does not enter, and the oxygen contained in the food is absorbed by the absorption layer to prevent oxidation and spoilage. As a result, it is possible to obtain a packaging bag which is capable of being heated in a microwave oven as it is and which is partially transparent, as well as ensuring long-term storability, without damaging the taste.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Organic gas barrier film 1 '.
A transparent non-chlorine-based oxygen barrier layer 1 (Vesera ... trademark, manufactured by Kureha Chemical Industry Co., Ltd.) by coating an oxygen barrier polymer composed of acrylic acid or its modified product (neutralized with NaOH or KOH) on the To form.

The inner surface of the barrier layer 1 is a chlorine-free P
A transparent layer 5 made of ET (polyethylene terephthalate), nylon or the like is laminated (tensioned) to perform the functions of protecting the barrier layer 1, printing, and maintaining film strength.

Further, on the inner surface of the transparent layer 5, a film (Omac ... Trademark, manufactured by Mitsubishi Gas Chemical Co., Ltd.) in which an oxygen absorbent is kneaded, that is, an iron-based oxygen absorbent is used as a polyolefin (PP).
Alternatively, a film kneaded with PE is laminated to form the chlorine-free oxygen absorbing layer 2.

On the inner surface of the oxygen absorbing layer 2, a polyolefin (PP or PE) is laminated (adhered) to form a sealant layer 3 to form a synthetic resin deoxidizing film material 4 '. The sealant layers 3 and 3 of the film materials 4 ′ and 4 ′ are abutted against each other, and the edge portion 4 ″ is heat-welded to form the packaging bag 4 made of the deoxidized film.

The oxygen absorbing layer 2 is the oxygen barrier layer 1.
On the entire inner surface of (Fig. 1 (a)) or Fig. 1 (b).
As shown in the figure, it is attached only to one side, and the absorbent layer 2 is not attached to the other side.

Further, the absorbent layer 2 is adhered to the opposing surface side and the bottom portion 6 of the stand bag 4 in FIGS. 2, 4 and 5 with or without being adhered to the bottom portion 6 of the inner surface of the packaging bag 4. Stick it to the department.

Since the absorbing layer 2 is opaque, the absorbing layer 2 is partially adhered, and the non-adhering portion is transparent to the oxygen barrier layer 1, the transparent layer 5 and the transparent sealant layer 3.
And the inner packaging material is formed so as to be seen through from the outside.

The packaging bag 4 is a stand bag having a bottom portion 6 as shown in FIGS. 3, 4 and 5, and a female bag 8 and a male strip 8'as shown in FIGS. There are sealed bags, etc.

As shown in FIG. 6, the hermetically sealed bag is provided with a female strip 8 on one of the facing surfaces on the opening side of the film bag 4 and a male strip 8'on the other side to fit both strips 8 and 8 '. Separate and form a sealed bag that can be opened and closed.

Protrusions 8a and 8b are formed on the inside of the bag and on the opening side of the male strip 8'in parallel with the direction of the male strip 8 '.
The protrusion width T of the protrusion 8b on the opening side is formed larger than the protrusion width t of the protrusion 8a on the inside of the bag, and both end edges 8c and 8d of the female protrusion 8 and the protrusions 8a and 8b of the male protrusion 8'are formed. By making the engagement width t of the inside of the bag smaller than the opening side engagement width T by making the engagement width of the inside of the bag the same as the protrusion widths T and t. The engagement protrusion 8a and the engagement end edge 8c can be separated more easily than the opening side engagement protrusion 8b and the engagement end edge 8d, and the expanded steam in the bag escapes outside the bag at a certain internal pressure or more. Form.

The items to be packaged include porridge, curry, stew, pasta sauce, steamed rice sauce, seasoning, soy sauce, soup, grated horseradish, white rice, side dish, oden, pet food, tuna, mackerel miso and the like.

[0019]

Since the present invention is constructed as described above, the oxygen in the outside air is prevented from entering the bag by the oxygen barrier layer, and the oxygen contained in the contents in the bag is absorbed by the oxygen absorbent. It has the effect of maintaining the freshness of the contents and preventing alteration.

Further, by partially eliminating the oxygen absorbing layer, the lacking portion can be made transparent and the contained object can be seen through from the outside of the bag.

Further, since it is formed of a chlorine-containing material, no harmful gas due to dioxins is generated during waste incineration.

By simply tearing the tearing notch formed in the above-mentioned film bag by hand, the pouring opening is opened and a convenient film bag can be obtained.

Furthermore, when the above-mentioned film bag is heated in a microwave oven, the fitting and sealing of the male and female strips can be easily opened, and the bag can be prevented from being broken by the expanding gas inside the bag, and a safe and convenient film bag can be obtained in the microwave oven. Is.

[Brief description of drawings]

FIG. 1 (a) is a vertical cross-sectional view of an opaque deoxidizing film bag of the present invention. (B) A vertical sectional view of the one-sided transparent deoxidizing film bag. FIG. 3C is a vertical cross-sectional view of the film bag having a window-like lack of oxygen absorbent.

FIG. 2A is a partially enlarged cross-sectional view taken along the line AA in FIG. 1B is a partially enlarged cross-sectional view taken along the line BB of FIG. 1C is a partially enlarged cross-sectional view taken along the line C-C in FIG.

FIG. 3 is a partially cutaway vertical sectional view of a stand bag.

FIG. 4 is a front view of an openable / closable sealed bag having male and female ridges.

FIG. 5 is a vertical side view taken along the line E-E of FIG.

FIG. 6 is a vertical cross-sectional side view taken along the line D-D of FIG.

FIG. 7 is a vertical cross-sectional view of a fitting state of a conventional male and female ridge.

[Explanation of symbols]

1 Non-Chlorine Oxygen Barrier Layer 1'Organic Gas Barrier Film 2 Polyolefin Oxygen Absorbing Layer 2'Polyolefin Film Kneaded with Oxygen Absorber 3 Sealant Layer 4 Film Bag 5 Transparent Dechlorinating Inner Layer

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3E064 AA09 AB23 BA22 BB01 BB03                       BC08 BC18 BC20 EA18 GA01                       HM01 HN13                 3E067 AA04 AA11 AB01 BA12A                       BB14A BB25A CA06 EA18                       EE32 EE33 FA01 FC01 GB13                       GD01

Claims (3)

[Claims] 1. A film bag comprising a non-chlorine oxygen barrier layer, the barrier layer being formed by an organic gas barrier film coated with an oxygen barrier polymer comprising acrylic acid or a modified product thereof, the oxygen barrier layer being formed. An oxygen absorbing layer made of a polyolefin film in which an oxygen absorbing agent is kneaded is attached to the inner surface of the sheet, a sealant layer is attached to the innermost layer, and the innermost layer is butt-welded to form a chlorine-free packaging bag. Deoxidized film bag that becomes. 2. The deoxidizing film bag according to claim 1, which is attached to the entire surface of the oxygen barrier layer or a part thereof such that the oxygen absorbing layer has a window-shaped lacking portion. 3. A film bag, which is a sealed bag that can be opened and closed by fitting and separating a female strip and a male strip on the opening-side facing surface, wherein a projecting strip facing the inner side of the male strip and the opening side is formed at the tip of the male strip. The deoxidizing film bag according to claim 1 or 2, wherein the opening-side ridge has a larger protrusion width than the bag-side ridge.