JP2002273818A - Packaging material for caulking material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a packaging material for a caulking material suppressing change in the appearance of a package with time after the caulking material is filled. SOLUTION: The packaging material 1 for the caulking material packages the caulking material. The packaging material comprises a synthetic resin film 3 having an oxygen gas permeability according to JIS K 7126 of 60 cc/mm<2> .24.1 atm hour or less and interposed between a polyolefin resin film 2 and an aluminum foil 4, and a protective film 7 made of a synthetic resin and laminated on the opposite surface of the foil 4 to the film 3 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing material for a caulking material for packing an amorphous filler (hereinafter referred to as a caulking material) for filling gaps such as a sealing material, and more particularly, to a caulking material. The present invention relates to a caulking material packaging material in which the appearance of a package is prevented from changing over time after packaging.

[0002]

2. Description of the Related Art In recent years,
A technique of film-packing a moisture-curable caulking material such as a one-part silicone caulking material into, for example, a sausage-like film has been developed.
Since barrier properties are required, it is designed with a configuration using aluminum foil.

However, when a caulking material is filled and sealed with a packaging material using an aluminum foil, the caulking material may attack the packaging material, degrade the aluminum foil, and cause a change in the appearance of the package. As a mechanism of the appearance change, it is considered that the content component passes through the inner film of the aluminum foil such as polyethylene, polypropylene and polyethylene phthalate and acts on the aluminum foil to cause the appearance change.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a packaging material for a caulking material in which after the caulking material is packaged, a change in the appearance of the package over time is suppressed.

[0005]

SUMMARY OF THE INVENTION The present invention provides a packaging material for packaging a caulking material in order to achieve the above object, wherein a JIS K-layer is provided between a polyolefin resin layer and an aluminum foil layer. A packaging material for a caulking material characterized by comprising a synthetic resin layer having an oxygen gas permeability of 60 cc / m ² · 24 hours · 1 atm or less according to 7126, and between a polyolefin resin layer and an aluminum foil layer A synthetic resin layer having an oxygen gas permeability of 70 cc / m ² · 24 hours · 1 atm or less according to JIS K-7126 is interposed, and a synthetic resin layer is formed on a surface of the aluminum foil layer opposite to the synthetic resin layer side. Provided is a packaging material for caulking, comprising at least one protective layer.

Here, it is more preferable that the synthetic resin layer is made of a synthetic resin containing an ethylene-vinyl alcohol copolymer or a synthetic resin containing meta-xylene diamine polyamide.

That is, the packaging material for a caulking material of the present invention has an oxygen gas permeability of 60 according to JIS K-7126 between a polyolefin resin layer and an aluminum foil layer.
Since cc / m ² · 24 hours · 1 atm or less of the synthetic resin layer is interposed, when the packaging material is filled packaging caulk as the polyolefin-based resin layer is inside, the components in the caulk over time Oxygen gas permeability of 60 cc / m ² · 24 hours · 1 atm according to JIS K-7126, which has excellent barrier properties (airproofness) to gases such as water vapor and gas even after passing through the polyolefin resin layer
Since the following synthetic resin layer is interposed inside the aluminum foil layer, it prevents the components in the caulking material from permeating, and as a result, the action on the aluminum foil layer is suppressed, and the appearance change of the package due to the above action is reduced. Can be prevented.

Accordingly, when the packing material for caulking material of the present invention is filled and packed with the caulking material such that the polyolefin resin layer is inside, the heat sealing property of the packaging material is ensured by the polyolefin resin layer. The contact between the caulking material and the aluminum foil layer can be prevented by the polyolefin-based resin layer and the synthetic resin layer. Further, even if the components in the caulking material pass through the polyolefin-based resin layer, The effect of the transmission component on the aluminum foil layer can be suppressed by the layer. Moreover, a sufficient barrier property against the outside air can be ensured by the aluminum foil layer.

The synthetic resin layer may be made of a synthetic resin containing an ethylene-vinyl alcohol copolymer, or may be a metaxylene such as MXD6 nylon obtained by a polycondensation reaction between metaxylene diamine and adipic acid. When it is made of a synthetic resin containing a diamine polyamide, the thickness of the synthetic resin layer required to secure the barrier property by the oxygen gas permeability can be reduced,
For example, when a caulking material is discharged from a package filled with a caulking material using a caulking gun, the remaining caulking material can be reduced in a small amount, which is more preferable.

Further, when a protective layer made of a synthetic resin is provided on the surface of the aluminum foil layer opposite to the synthetic resin layer side, a change in the appearance of the package due to the above action can be made inconspicuous. Also, as a synthetic resin forming the protective layer, if a polyolefin-based resin layer is laminated so as to be the outermost layer of the packaging material, a method of bonding the ends of the packaging material by heat sealing, for example, in manufacturing the package. When adopted, in addition to bonding the end faces of the innermost polyolefin resin layer to face each other, the end faces of the polyolefin resin layer and the end faces of the outermost polyolefin resin layer face each other. Lamination (hereinafter, referred to as envelope lamination) is also possible, and the degree of freedom in laminating packaging materials is increased. In addition, the practical strength of the packaging material itself, such as prevention of pinholes in the packaging material,
The protection effect is enhanced.

On the other hand, the synthetic resin layer is JIS K-71.
Oxygen gas transmission rate by 26 70cc / m ² · 24 hours ·
1atm or less, that is, JIS K-7126 not oxygen gas permeability of 60cc / m ² · 24 hours · 1atm hereinafter only by oxygen gas permeability according to JIS K-7126 is greater than 60cc / m ² · 24 hours · 1atm, 70c
Even if the synthetic resin layer is c / m ² · 24 hours · 1 atm or less, two or more protective layers made of synthetic resin are provided on the surface of the aluminum foil layer opposite to the synthetic resin layer side. Since the change in the appearance of the package due to the action can be made inconspicuous, a packaging material for a caulking material in which the change in the appearance of the package over time after packaging the caulking material is obtained.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a part of a caulking material packaging material 1 showing one configuration example of the caulking material packaging material of the present invention.

The caulking packaging material 1 is made of JIS K-71 laminated on one surface of a polyolefin resin layer 2.
Oxygen gas transmission rate by 26 70cc / m ² · 24 hours ·
A protective layer comprising a synthetic resin layer 3 of 1 atm or less, an aluminum foil layer 4 laminated on the synthetic resin layer 3, and a first protective layer 5 and a second protective layer 6 laminated on the aluminum foil layer 4 7 are laminated.

Here, the material and thickness of the polyolefin resin layer 2 are not particularly limited as long as the polyolefin resin layer 2 is formed of an olefin resin, for example, a resin such as polypropylene (PP) or polyethylene (PE). It is preferable to dry-laminate what is molded into a film using an adhesive, or to form the resin by directly melt-extruding the resin, taking into account the action from the caulking material, heat sealing properties when attached to an envelope, etc. For example, among these, an unstretched polypropylene (CPP) film that is excellent in mechanical strength, heat sealability, stress crack resistance, and the like is more preferable.

The thickness of the polyolefin resin layer 2 is preferably 15 to 70 μm, particularly preferably 20 to 30 μm. If it is too thin, it may cause breakage of transport bags or drop bags. If it is too thick, it may be disadvantageous in terms of cost or may be hard and difficult to use.

The synthetic resin layer 3, which functions as a gas barrier layer, JIS K-7126 oxygen gas permeability of 70 cc / m ² · 24 hours · 1 atm or below, ^2-preferably 0.1~70cc / m 24 hours, 1 atm,
More preferably, 0.1 to 60 cc / m ² · 24 hours · 1
atm, more preferably 0.1 to 5.0 cc / m ² · 2
The material and thickness are not particularly limited as long as a synthetic resin layer of 4 hours and 1 atm is formed. Examples of such a synthetic resin include polyamide resin, vinylidene chloride resin, acrylic resin, and the like. Ethylene-vinyl alcohol copolymer (EVOH) resin is exemplified. It is preferable to laminate a single film of these resins, a laminated film of these resins and other synthetic resins, or a resin film in which these are mixed.

Of these, lamination of a film of metaxylenediamine polyamide or EVOH alone is particularly effective in terms of the action with the contents, and lamination of a coextruded film of these with a 6-nylon resin has a practical strength. It is particularly effective in that respect.

The thickness of the synthetic resin layer 3 is not particularly limited as long as gas barrier properties are ensured.
9 to 38 μm, especially 15 to 25 μm is suitable. If it is too thin, gas barrier properties may not be ensured, and if it is too thick, it may be disadvantageous in terms of cost or may be hard and difficult to use.

The thickness of the aluminum foil layer 4 is not particularly limited, but is preferably 6 to 20 μm, particularly preferably 7 to 9 μm. If it is too thin, gas barrier properties cannot be secured,
When the content is cured, if it is too thick, it may be disadvantageous in terms of cost or may be hard and difficult to use.

The protective layer 7 serves to suppress the change in the appearance of the aluminum foil layer 4 and to prevent the aluminum foil layer 4 from deteriorating due to contact with other articles or water vapor or oxygen in the air. The material, thickness and number of layers are not particularly limited as long as they are formed by the method described above, and the synthetic resin layer 3 has an oxygen gas permeability according to JIS K-7126 of 60 cc / m ² · 24 hours · 1 atm or less. If
It may have no protective layer, or may have a two-layer structure formed by the first protective layer 5 and the second protective layer 6 as shown in the drawing, and may have a single-layer structure in which appropriate types of synthetic resin films are laminated. May be used.

However, the above synthetic resin layer 3 is JIS
Oxygen gas permeability by K-7126 60 cc / m ² ·
If it exceeds 24 hours and 1 atm and is 70 cc / m ² · 24 hours and 1 atm or less, it has a two-layer structure formed by the first protective layer 5 and the second protective layer 6 as shown in the drawing. It is necessary. In any case, in consideration of the effect as a protective layer, a laminate having a stretched film having excellent mechanical strength and a polypolyolefin resin layer heat-sealable to the innermost layer is protected. It is desirable to form a layer.

When the protective layer 7 is composed of the first protective layer 5 and the second protective layer 6, the combination of these materials is not particularly limited, but the first layer laminated on the aluminum foil layer 4 side is not limited. As the protective layer 5, a film of biaxially oriented polypropylene, biaxially oriented polyamide, biaxially oriented polyester or the like is preferably laminated.

On the other hand, the second protective layer 6, which is the outermost layer, is formed by extrusion laminating an olefin resin such as polypropylene (PP) or polyethylene (PE) or by dry laminating a film thereof. Among them, polypropylene (PP) is more preferable in consideration of the mechanical strength, heat sealing property with the innermost layer of the polyolefin resin when the envelope is attached, and the like.

The thickness of the first protective layer 5 is 9 to 38 μm.
m, particularly preferably 15 to 25 μm. If the thickness is too thin, the function of protecting the aluminum foil layer 4 may be insufficient, the function of suppressing the change in the appearance of the aluminum foil layer 4 may be insufficient, or transport breakage or dropping breakage may occur.
It may be disadvantageous in terms of cost or may be hard and difficult to use. On the other hand, the thickness of the second protective layer 6 is 15 to 70 μm.
m, particularly preferably 20 to 30 μm. If it is too thin, it may cause transport breakage or dropping when it is attached to an envelope. If it is too thick, it may be disadvantageous in terms of cost or may be hard and difficult to use. In addition, the first protective layer 5,
For the same reason, the total thickness of the second protective layer 6, that is, the thickness as the protective layer 7, is 24 to 108 μm, particularly 35 to 108 μm.
55 μm is preferred.

In the case of the present invention, the synthetic resin layer 3 is made of JI
Oxygen gas permeability by SK-7126 60 cc / m ²
As long as it is not more than 24 hours and 1 atm, the protective layer may have a single-layer configuration as described above, or may have a configuration of three or more layers. Good. Further, a layer made of a material other than the synthetic resin can be laminated. When the protective layer 7 has a single-layer structure,
The material is preferably the material of the first protective layer 5, but may be the material of the second protective layer 6 when the envelope is attached.

The method for producing the caulking material packaging material 1 is as follows.
The method is not particularly limited, and a known method can be employed. Specifically, it can be produced by a method such as a dry lamination method, an extrusion lamination method, or a heat lamination method.

Here, the kind of the caulking material to be filled and sealed with the caulking material packaging material 1 is not particularly limited, but for example, a one-component moisture-curable silicone sealing agent or the like is suitable.

It should be noted that the present invention is not limited to the above configuration, and various changes may be made without departing from the spirit of the present invention.

Next, the present invention will be described in more detail with reference to Examples and Comparative Examples.

Examples and Comparative Examples Each film was laminated by a dry laminating method so as to have a packaging material configuration shown in Table 1, thereby producing a packaging material for a caulking material. Each packaging material was filled with a one-component moisture-curable silicone-based caulking material (manufactured by Konishi Co., Ltd.) and sealed 50 × 1
A 00 mm three-sided bag was folded in half so that the polyolefin-based resin layer was the innermost layer, and the end of the packaging material was heat-sealed. The appearance change of the package was evaluated based on the following evaluation criteria. Table 2 shows the results.

<Evaluation Criteria> ：: No change in appearance is observed. ：: Small bumpy shape having a diameter of about 30 to 50 μm (deterioration of aluminum foil layer). △△: Bubbly shape over entire surface (deterioration of aluminum foil layer). ： Small bumps and block with continuous small bumps on the entire surface (deterioration of aluminum foil layer)

[0032]

[Table 1]

* 1: Oxygen gas permeability according to JIS K-7126 (cc / m ² · 24 hours · 1 atm) PP: unstretched polypropylene film TOCELLO GHC EVOH: ethylene-vinyl alcohol copolymer film KURARAY Co., Ltd. EVAL XL NY-EVOH-NY: 6-nylon-EVOH-6
Nylon co-extrusion film Unitika EMBROM E
201 PET: Biaxially stretched polyethylene terephthalate film Toyobo E-5102 AL: Aluminum foil Toyo Aluminum NY: Biaxially stretched 6-nylon film Unitika Ltd.
Emblem ON NY-MXDNY-NY: 6-nylon-meta-xylene diamine polyamide-6-nylon co-extruded film Unitika M101

[0034]

[Table 2]

[0035]

According to the present invention, a packing material for a caulking material in which the appearance change of the package over time is suppressed after filling the caulking material is obtained. It is particularly useful as a packaging material for a one-component moisture-curable silicone caulking material containing a component that easily affects the foil.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a packaging material for explaining one configuration example of a caulking material packaging material of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging material for caulking materials 2 Polyolefin resin layer 3 Synthetic resin layer 4 Aluminum foil layer 7 Protective layer

Continued on the front page F-term (reference) 3E067 AA04 AB96 BB25A CA05 CA06 EA06 FA01 FC01 GD10 3E086 BA04 BA13 BA15 BB02 BB05 CA29 4F100 AB10B AB33B AK01C AK01D AK01E AK03A AK07 AK42 AK46B10J10 BA10BA10 BAK

Claims (5)

[Claims] 1. A packaging material for packaging caulk, and a polyolefin resin layer, between the aluminum foil layer, JIS K-7126 oxygen gas permeability due to 60cc / m ² · 24 hours · 1 atm A packaging material for a caulking material, wherein the following synthetic resin layer is interposed. 2. The packaging material for a caulking material according to claim 1, wherein said synthetic resin layer is made of a synthetic resin containing an ethylene-vinyl alcohol copolymer. 3. The packaging material for a caulking material according to claim 1, wherein the synthetic resin layer is made of a synthetic resin containing meta-xylene diamine polyamide. 4. A caulking packaging material further comprising a protective layer made of a synthetic resin on a surface of the aluminum foil layer opposite to the synthetic resin layer side. 5. A synthetic resin layer having an oxygen gas permeability of 70 cc / m ² · 24 hours · 1 atm or less according to JIS K-7126 interposed between a polyolefin resin layer and an aluminum foil layer. A caulking packaging material comprising two or more protective layers made of a synthetic resin on the surface of the foil layer opposite to the synthetic resin layer side.