JPH02166076A - Bag containing package - Google Patents

Abstract

PURPOSE:To permit each component of multicomponent composition to be packaged separately in order to make its long time storage possible by using as a substrate D the composite materials formed by applying a specific resin layer A or the multiple resin layer C consisting of the resin layer A and a specific resin layer B with the layer A in direct contact with the substrate. CONSTITUTION:Composite materials are formed by applying a resin layer A consisting mainly of (co)polymer of carboxyl group denaturated olefin or the multiple resin layer C consisting of the resin layer A and of a resin layer B consisting mainly of (co)polymer of olefin to each side of aluminum foil with the layer A in direct contact therewith without using adhesive layers. Packaging bag is formed using such composite materials as a substrate D. In a package containing an optional component, the other components can be contained on a separate basis therefrom by the use of this bag.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a multi-component system that is useful in various fields such as paints, adhesives, printing inks, pharmaceuticals, cosmetics, foods, etc., and which should be mixed immediately before use. The present invention relates to a packaging bag for internally containing a composition, which is used to separate and incorporate five other components into the package containing arbitrary components.

(Prior art) Two-component paints such as polyurethane paints and epoxy resin paints, reactive adhesives such as epoxy resin adhesives, reactive printing inks such as urethane-based flexo or gravure inks, two-component paints, etc. In various industrial fields, such as dyes, sparkling carbonated drinks made of bicarbonate such as bicarbonate soda and organic acids such as citric acid, and pressurized spray containers that utilize the generated gas, at least two components are used. There are various multi-component compositions that require mixing immediately before use. Usually, each component of these compositions is individually packaged, and each packaging container must be opened and transferred to another container or poured into a container for one of the components and mixed before each use. is used.

In the above-mentioned mixing operation, the contents tend to scatter or spill out of the container when the components are moved or mixed, so the blending ratio often fluctuates and the desired effect cannot be obtained.

Furthermore, the contents dissipate outside the container, contaminating the surrounding environment, and adhering to the skin, which is unpleasant and further spreads the contaminated area, which may also cause hygiene problems.

In addition, when it is necessary to mix small amounts of each component, such as adhesives for the electronic materials field, partial gray hair dye, household paints and adhesives, and sparkling carbonated drinks, the ratio of the ingredients is likely to be inaccurate. There is a problem that the loss becomes large.

As a countermeasure for this, in a package for packaging a multi-component composition to be mixed immediately before use, each of the other components is individually stored in an arbitrary number of packaging bags in the package containing at least one arbitrary component. A method has been proposed in which the packaging bag is built into the bag, and upon use, the built-in packaging bag is destroyed by appropriate means and the contents are mixed.

Examples of such built-in packaging bags include packaging bags based on a laminate obtained by laminating aluminum foil and plastic film, which are widely used in various fields such as food, medicine, cosmetics, and toiletry products. Packaging processability, strength, handling properties, light shielding properties, gas barrier properties,
It is widely used because it has a good balance of physical properties such as water resistance, chemical resistance, heat resistance, and cold resistance.

These packaging base materials are made by printing letters or designs on one surface of an aluminum foil or sheet, or coating them with a heat-resistant paint without printing, or by coating them with a heat-resistant paint such as polyethylene terephthalate, polycarbonate, nylon, or polypropylene. A laminate is often used in which a heat-resistant plastic film is bonded to form a heat-resistant resin layer, and a heat-sealable polyolefin resin layer is provided on the other surface.

There are various forms of packaging such as three-sided sealed bags, four-sided sealed bags, billow packaging, stick packaging, pouch packaging, and strip packaging, but all of these laminate packaging bags have heat-sealable properties that form the inner layer of the packaging bag. A packaging bag is obtained by placing the resin layers as opposing surfaces, or by overlapping the heat-sealable resin layer with the surface of the heat-resistant resin layer serving as the outer layer of the packaging bag, and heat-sealing the required portions.

When adhering a polyolefin resin film to the surface of aluminum foil as a heat-sealable resin layer and adhering a heat-resistant plastic film to the other surface as a heat-resistant resin layer, it is generally difficult to heat-seal the film directly. Therefore, a so-called dry lamination method, in which adhesives are attached using a thermosetting adhesive such as a urethane-based or an epoxy-based adhesive, is commonly used.

(Problems to be Solved by the Invention) As described above, the conventional heat-sealable laminate for packaging in which a heat-sealable film or a heat-resistant plastic film and an aluminum foil or sheet are laminated with a urethane adhesive has a It has excellent adhesive strength and good physical properties, especially heat resistance, water vapor resistance, and chemical resistance, so it can be used in a variety of fields, including packaging materials for retort food. It is used for

However, when used as a packaging bag for internal packaging for the purpose of isolating and packaging each component of a multi-component composition, there are many problems such as mixing of the isolated components during long-term storage. ing.

Such compositions include dyes, fragrances for fragrance and deodorization,
It is common for highly permeable and corrosive components such as preservatives, disinfectants, flame retardants, surfactants, catalysts for reactions, organic and inorganic acids and alkalis, and organic solvents to be added, and for isolation. This is because the stored components have a higher concentration than in the mixed composition, and therefore have a stronger erosive effect, which can easily damage the packaging bag. In addition, because of the special storage environment of a built-in packaging bag, the cross section of the base material of the packaging bag always comes into contact with some component, regardless of the design of the bag, so that components permeate through the cross section. Therefore, the materials constituting each layer of the heat-sealable laminate for packaging, which is made by laminating the heat-sealable film, heat-resistant plastic film, or heat-resistant coating layer and aluminum foil, are resistant to the contents of the package, regardless of whether they are the inner or outer layers. In addition, similar resistance is required for the adhesive used between the eyebrows and the surface coating material. No packaging bag has been developed that can be used and stored for a long period of time as a built-in packaging bag.

(Means for Solving the Problems) The present inventors have aimed at isolating and packaging each component of a multi-component composition that can withstand erosion and penetration of components during long-term storage and can prevent migration of components. As a result of repeated research with the aim of obtaining a packaging bag for internal use in packaging bodies, we found that resin layers (A) mainly composed of carboxyl group-modified olefin (co)polymers or carboxyl group-modified olefin (co)polymers were coated on both sides of aluminum foil. Co) Resin layer containing polymer as main component (A>
and a resin layer mainly composed of an olefin (co)polymer (
A composite resin layer (C) consisting of a base material (D The present invention was completed by discovering that the initial objective could be achieved by manufacturing a packaging bag as follows.

The carboxyl group-modified olefin (co)polymer which is the main component of the resin layer (A) constituting the base material (D>) of the packaging bag for built-in packaging of the present invention is a (co)polymer of olefins, particularly ethylene or propylene. A carboxyl group-modified product of the combination is suitable, and one that forms a non-adhesive film at room temperature is preferred.A carboxyl group having a chemically bonded form is suitable, and there are no particular restrictions on the method of introduction. .

Rachi, polymerizable unsaturated carboxylic acids such as (meth)acrylic acid, crotonic acid, maleic acid 1, fumaric acid, itaconic acid, and citraconic acid, or their anhydrides, etc. are copolymerized during the production of olefin (co)polymers. A method in which dicarboxylic acids such as maleic anhydride, fumaric acid, or itaconic acid is copolymerized with an olefin (co)polymer as a component, or a method in which an olefin (co)polymer is graft polymerized or copolymerized with other unsaturated polymerizable monomers, and dicarboxylic acids such as maleic anhydride, fumaric acid, or itaconic acid are A carboxyl group can be introduced by arbitrarily selecting a conventional method such as addition to a co)polymer. In addition, for example, an olefin (co)polymer having a hydroxyl group is used as maleic acid.

The carboxyl group-modified olefin (co)polymer, which is 0 years old and may be one that utilizes a synthesis method such as a method of introducing a carboxyl group by half-esterification with a slightly carboxylic acid such as fumaric acid or itaconic acid, is an olefin and Modifying monomers other than the carboxyl group-modifying monomer may be copolymerized.

These (co)polymers may be used alone or as a mixture, or mixed with other (co)polymers or resins, if necessary.

Ethylene or Homopolymers of propylene and copolymers with other olefins are preferred; these (co)polymers have different physical properties due to differences in physical structure such as differences in molecular weight distribution and conformation. However, any of them can be used in the method of the present invention. Preferred polyolefin (co)polymers include polyethylene, polypropylene, polybutene-1, poly(4-methylpentene-1), and ethylene-propylene of various structures. Polymers, ethylene/vinyl acetate copolymers, etc., and these (co)polymers may be used alone or as a mixture, or mixed with (co)polymers or resins other than those mentioned above, if necessary.

The thickness of each resin layer (A) and (B) is preferably thicker from the viewpoint of various physical properties, but it is not necessarily appropriate from the viewpoint of economy, processability and handling, and the thickness is in the range of several microns to about 100 microns. It's fine if you have one, and there are no particular restrictions.

The aluminum foil used in the method of the present invention is not particularly limited as long as it is generally used as a packaging material. Therefore, if necessary, aluminum foil with a thickness of several microns to several hundreds of microns may be used, and it may be hard or soft. You can also use any type of foil. Furthermore, it is also possible to apply letters, designs, or a colored film to the surface of the aluminum foil by printing or the like using a coating agent or ink that is resistant to the contents of the package, if necessary.

A resin layer (A) mainly composed of a carboxyl group-modified olefin (co)polymer or a resin layer (A> and olefin (co)polymer) mainly composed of a carboxyl group-modified olefin (co)polymer is formed on the surface of the aluminum foil. A method of laminating a composite resin layer (C) consisting of a resin layer (B) whose main component is coalescence so that the carboxyl group-modified olefin (co)polymer resin layer is in direct contact with the aluminum foil is an extrusion lamination method. The vAD layer (A> film and the olefin (co)polymer as the main component) is formed by laminating each resin layer on aluminum foil or by using a T-die or an inflation extruder. A resin layer mainly composed of a carboxyl group-modified olefin (co)polymer is produced by manufacturing a film of the resin layer (B) as a component or by coextrusion <A)
and a resin layer mainly composed of an olefin (co)polymer (
B) Produce a film of composite resin layer (C) consisting of
A suitable method is to heat-seal these films to aluminum foil. In either case, it is necessary to laminate the aluminum foil and the resin layer (A>) whose main component is a carboxyl group-modified olefin (co)polymer so that they adhere to each other.

For example, composite resin J! 1 (C) The resin layer (C) whose main component is a carboxyl group-modified olefin (co)polymer (
A> and aluminum foil are brought into contact with each other, and a resin layer containing the carboxyl-modified olefin (co)polymer as a main component
Temporarily bonding by lightly pressing at a temperature higher than the Vicat softening point of A>, holding the obtained laminate in an atmosphere at a temperature higher than the Vicat softening point, and then pressing at a temperature higher than the Vicat softening point. As a result, strong adhesion between the resin layer (A> mainly composed of a carboxyl group-modified olefin (co)polymer) and the aluminum foil can be obtained.

In manufacturing the packaging bag for built-in packaging of the present invention, a resin layer (A) containing a carboxyl group-modified olefin (co)polymer or a carboxyl group-modified olefin (co)polymer is applied on both sides of the aluminum foil. A composite resin layer (C) consisting of a resin layer (A) mainly composed of and a resin layer <8) mainly composed of an olefin (co)polymer, is The composite material provided so as to be in direct contact with the aluminum foil is used as the packaging base material (D), and processing methods such as sealing are carried out in a conventional manner using a general packaging machine.

(Functions and Effects) The carboxyl group-modified olefin (co)polymer, which is the main component of the resin layer (A) constituting the base material (D) of the packaging bag for built-in packaging of the present invention, has particularly good adhesiveness to aluminum foil. It has low activity against various organic and inorganic chemicals, and is used as the main contents and additives of packaging in various fields, such as dyes, pigments, fragrances, preservatives, preservatives, sterilizing nets, etc. Because it is resistant to flame retardants, surfactants, catalysts, organic and inorganic acids and alkalis, it is also suitable as the outer surface layer of the packaging bag base material (D>), but aluminum foil and olefin-based Since it has excellent heat-sealability for plastics, it is highly effective when used as a heat-sealable resin layer on the inner surface.

The olefin (co)polymer which is the main component of one resin layer (B) of the composite resin layer (C) constituting the base material (D) of the packaging bag for built-in packaging of the present invention is used in the various fields mentioned above. A resin layer or heat-resistant resin layer that has extremely high resistance to the main contents of the packaging bag and additives, and exhibits heat sealability depending on the physical structure and selection of the type and amount of comonomer in copolymerization. Therefore, it can be laminated on the resin layer (A) whose main component is a carboxyl group-modified olefin (co)polymer to form a heat-resistant resin layer whose main component is an olefin (co)polymer. Alternatively, it can be used as a heat sealing layer for a heat-resistant resin layer.

The base material (D> of the packaging bag for built-in packaging of the present invention can be processed into a packaging bag by heat sealing by making the resin layer on either side heat sealable. Since the resin layer and the aluminum foil are directly bonded to each other, the cross section of the base material is not eroded or destroyed by the contents of the package.

Hereinafter, the present invention will be explained in more detail with reference to examples.

[Example 1] Production of film 1 (resin layer (A> film): Admer NEO70 (carboxyl group-modified linear low density polyethylene manufactured by Mitsui Petrochemical Industries; Vicat softening point 87°C, melt index 1.0) From the pellet, cylinder temperature 1 using a blown film extruder
A film with a thickness of 30μ was produced at 60°C and a die temperature of 197°C.

Production of film 2 (film of resin layer (C)): Atomer NEO70 described in the example of film 1 was used as a component of the resin layer (A), and UP Polypro FM201-F (Union) was used as a component of the resin layer (B). Polymer M-made polypropylene (Vicat softening point 135°C, melt index 8.0) was used using a two-layer inflation extruder with a cylinder temperature of 165°C and a die temperature of 200°C.
The film was produced. The film thickness of the obtained composite resin layer (C) was 40 μm, and the thicknesses of the resin layers (A) and (B) were each 20 μm.

Preparation and use of the packaging base material (Dl): The resin layer (A) side of the film 2 was brought into contact with one side of a soft aluminum foil having a thickness of 20μ, and a steel heating roll set at 170°C and a silicone rubber pressure roller were used. After temporary adhesion of 4 kg/+ using a press roll made of paulownia wood, the pieces were held in a heating furnace at an ambient temperature of 170°C for 10 seconds, and then pressed and laminated using a press roll set under the same conditions as above.

Next, a film 1 is placed on the other side of the aluminum foil of the laminate.
were laminated in the same manner as the lamination process for film 2, to obtain the desired packaging base material (Dl).

Heat sealing strength test: The obtained packaging base material (Dl) was applied to each film 1 and the film 1 side and the film 2 side at a pressure of 3 kg/
Heat sealing was performed at 180° C. for 1 second at cm2.

Peel speed of 180 degree peel strength of these samples is 200 m
/sin, the heat sealing strength was as high as 2000 g in the case of one side of the film.

The base material was destroyed when the In the case of 1 side and 2 sides of the film, sufficient heat sealing strength was shown at 1800 g.

Chemical resistance test: Using the same sample as the one used in the heat sealing test above,
Packaging base material (Dl) cut into cn+X I Oc+*
Make it into a cylinder so that the first side of the film is the inner surface, and heat seal it with a width of 5 m so that the first side of the film overlaps the second side of the film to create a cylinder. Both ends of the cylinder are similarly heat sealed with a width of 5 mm. The heat-sealed part was made between one side of the film, and the structure was made into a billow packaging bag.

This and the raw packaging bag each contain 10% hydrochloric acid, 10% caustic soda, methanol, 60z ethanol, toluene, methyl ethyl ketone, ethyl acetate, ρ-toluenesulfonic acid (
5% xylene/butanol solution), orange oil, lemon oil, sodium benzoate (5% aqueous solution), sodium laurate (2% aqueous solution), neutral surfactant (nonylphenol type, HLB = 17.10% aqueous solution). A chemical solution was sealed in advance, and the package was immersed in the same chemical solution as the sealed one, and after being left at 40° C. for 3 months, the state of the packaging base material (D) and its heat-sealed portion was observed.

No clear changes were observed in the surfaces or interfaces of each layer of the packaging base material and the heat-sealed portion, and the glabella adhesion was maintained.

(Comparative Example 1) Production of film 2°: UP Polypro F used in Example 1 as the resin layer (C)
M201-F (polypropylene manufactured by Union Polymer;
Vicat softening point 135℃, melt index 8.0)
A single-layer film was produced using an inflation extruder at a cylinder temperature of 165°C and a die temperature of 200°C. The thickness of the obtained film was 20μ.

Production of packaging base material (D1'): The above film 2° was coated on one side of the same aluminum foil used in Example 1 with a two-component polyurethane dry lamination adhesive (manufactured by Ota Pharmaceutical Co., Ltd., Takelac A310). /Takenate A3) and laminated by a normal process.

Next, the film 1 of Example 1 was laminated on the other side of the aluminum foil of the laminate using a dry lamination adhesive in the same manner as the film 2', and the packaging base material (DIo
) was obtained.

Heat sealing strength test The obtained packaging base material (D 1”) was
The test was carried out using the same machine as in Example 1, with both sides and the first side of the film and the second side of the film being used. The 180 degree peel strength of these samples was measured at a peel rate of 200 m/sin, but in the case of films with one side to the other, the heat sealing strength was 200 m/sin.
If the weight exceeds 0 g, the base material will be destroyed, and the film will be
The case with the surface also showed a large value of 1960g.

Chemical resistance test: Example 1 using the same sample subjected to the heat sealing test above.
A billow packaging bag was prepared in the same manner as in , and a chemical resistance test was conducted in the same manner.

No major changes were observed for aluminum foil stamping and films 1 and 2°, but the adhesive layer for dry lamination lost all adhesive strength or peeled when immersed in chemicals other than sodium benzoate. Ta.

[Example 2] Production of film 3 (film of resin layer <A): Performed from a pellet of Admar QEO50 (carboxyl group-modified polypropylene manufactured by Mitsui Petrochemical Industries, Ltd.; Vicat softening point: 120°C, melt index: 27.0) A 30 micron thick film was produced using a blown film extruder in the same manner as in the production of Film 1 in Example 1.

Manufacture of packaging base material (D2): The resin layer (A>!M) of film 2 of Example 1 was treated in the same manner as in Example 1, and the resin layer (A>!M) of the film 2 of Example 1 was treated in the same manner as in Example 1, and then pressed and laminated with a press roll. did.

Next, the film 3 was laminated on the other side of the aluminum foil of the laminate using the same machine as the film 2, to obtain the desired packaging base material (D2).

Heat sealing strength test @: The obtained packaging base material (D2) was applied to a pressure of 3 g /
Heat sealing was performed at 180° C. for 1 second at cm2.

Peel speed of 180 degree peel strength of these samples is 200 m
/sin, and in the case of one side of the film, the heat sealing strength was high and exceeded 2000 g, causing destruction of the base material. In the case of the first and second sides of the film, the weight exceeded 2000g, causing substrate failure.

Chemical resistance test: A chemical resistance test was conducted using the same sample as that used in the heat sealing test described above using each chemical solution on the same machine as in Example 1.

No clear changes were observed in the surfaces or interfaces of each layer of the packaging base material and the heat-sealed portion, and adhesion between the layers was maintained.

Claims (1)

[Scope of Claims] A resin layer (A) containing a carboxyl group-modified olefin (co)polymer as a main component or a resin layer (A) containing a carboxyl group-modified olefin (co)polymer as a main component on both sides of the aluminum foil, respectively. ) and a resin layer (B) containing an olefin (co)polymer as a main component, the composite resin layer (C) is provided such that the carboxyl group-modified olefin (co)polymer resin layer is in direct contact with the aluminum foil. A package for a multi-component composition to be mixed at the time of use, characterized in that a composite material consisting of: A built-in packaging bag for storing and incorporating.