JPH06226910A - Nonabsorptive wrapping material and extruded tube vessel formed by this wrapping material - Google Patents

Abstract

PURPOSE:To provide the nonabsorptive wrapping material which is excellent in nonabsorptive properties for a component high in permeability and has good hand and draping by forming a surface resin layer and a rear resin layer of polyacrylonitrile resin or linear saturated polyester resin having the specified glass transition temperature and interposing polyolefine-based resin layers be tween these and an intermediate layer. CONSTITUTION:Nonabsorptive wrapping material 1 is constituted of a surface resin layer 7 which is formed of polyacrylonitrile resin or linear saturated polyester resin having >=40 deg.C glass transition temperature, a rear resin layer 8 formed of the same resin as the surface resin layer 7 and an intermediate layer 3 constituted of a metallic foil laminated between the surface resin layer 7 and the rear resin layer 8. A laminated sheet is constituted by melting and extruding polyolefine-based resin between the intermediate layer 3 and the surface resin layer 7 and between the intermediate layer 3 and the rear resin layer 8 and interposing resin layers 4, 5. A tube vessel is so formed that the rear resin layer 8 in the laminated sheet becomes the internal circumferential face layer of a drum part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging material which is excellent in non-adsorption to the contents in the packaging material and has a good texture, and an extruded tube container made of the packaging material.

[0002]

2. Description of the Related Art As a packaging material excellent in non-adsorption to the contents in a packaging material, a layer in contact with the contents is formed of polyacrylonitrile resin or a linear saturated polyester resin having a glass transition temperature of 40 ° C. or higher. Things have been proposed.

[0003]

The conventional non-adsorptive packaging material is packaged because the polyacrylonitrile resin which exhibits non-adsorptive performance or the linear saturated polyester resin itself having a glass transition temperature of 40 ° C. or more is hard. Not only does the material become hard and the texture is poor, but it also has the drawback that cracks easily occur.

On the other hand, the present invention provides a packaging material which is excellent in non-adsorptive property with respect to highly permeable components contained in the contents and has a good texture, and a tube container made of the packaging material. provide.

[0005]

The non-adsorptive packaging material of the present invention comprises a surface resin layer formed of a polyacrylonitrile resin or a linear saturated polyester resin having a glass transition temperature of 40 ° C. or higher, and the surface resin layer. And a backside resin layer formed of the same resin as the above, and an intermediate layer made of a metal foil laminated between these surface resin layer and backside resin layer, and the intermediate layer and the surface resin layer It is composed of a laminated sheet in which a melt-extruded resin layer of polyolefin resin is interposed between the intermediate layer and the intermediate layer and the back surface resin layer.

In the extruded tube container of the present invention, the body part of the tube container is made of a polyacrylonitrile resin or a linear saturated polyester resin having a glass transition temperature of 40 ° C. or higher, and the surface resin layer. And a backside resin layer formed of the same resin as the above, and an intermediate layer made of a metal foil laminated between these surface resin layer and backside resin layer, and the intermediate layer and the surface resin layer And a laminated sheet in which a melt-extruded resin layer of a polyolefin-based resin is interposed between the intermediate layer and the backside resin layer, so that the backside resin layer in the laminated sheet becomes the body inner surface layer. It consists of a molded tube container.

In the non-adsorptive packaging material of the present invention having the above structure and the extruded tube container made of the packaging material, commercially available Valex (trade name) or the like is used as the polyacrylonitrile resin.

Examples of the linear saturated polyester resin having a glass transition temperature of 40 ° C. or higher include alcohol components such as ethylene glycol, propylene glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol, and adipic acid. Co-condensation polymer with dicarboxylic acid component such as aliphatic dicarboxylic acid such as or sebacic acid, aromatic dicarboxylic acid such as terephthalic acid, isophthalic acid and diphenylcarboxylic acid, specifically ethylene glycol and terephthalic acid, ethylene glycol Polyester resin made of a co-condensation polymer of isophthalic acid and terephthalic acid, 1,4-cyclohexanedimethanol and ethylene glycol and terephthalic acid, propylene glycol and isophthalic acid and terephthalic acid, and the like are used.

In the case of a co-condensation polymer in which the aliphatic dicarboxylic acid component in the acid component of the linear saturated polyester resin is 10% by weight or more, the penetration resistance of the internal filler tends to decrease. It is not preferable because it has

In particular, the linear saturated polyester resin layer has an excellent non-adsorption property for highly penetrating components in the atmosphere below the glass transition temperature of the linear saturated polyester resin. A linear saturated polyester resin having a glass transition temperature of 40 ° C. or higher is used because the handling temperature of ordinary products is less than 40 ° C.

The front surface resin layer and the back surface resin layer in the laminated sheet are formed to have a thickness of about 30 to 200 μm by a dry laminating method or the like.

The container body of the extruded tube container of the present invention comprises a tubular body made of the above-mentioned laminated sheet, and is formed into a tubular body by joining one side portion and the other side portion of the laminated sheet. Molded.

The head, which is composed of a frustoconical shoulder portion attached to the tubular container body of a tubular body and a mouth and neck portion of a narrow neck continuous to the shoulder portion, is usually used for injection molding in which the tubular body is inserted. It is formed by using a mold and injecting a molten resin in the mold.

In this case, it is preferable to use the same resin as the back surface resin layer in the body of the tube container as the resin for forming the head.

[0015]

EXAMPLES The specific constitution of the non-adsorptive packaging material of the present invention and the extruded tube container made of the packaging material will be described with reference to production examples.

Example 1 In FIG. 1, a biaxially stretched PET film 2 having a thickness of 12 μ and an aluminum foil 3 having a thickness of 9 μ were laminated using a melt extruded resin layer 4 of a polyethylene resin having a thickness of 30 μ. Thereafter, the aluminum foil 3 and the polyethylene film 5 having a thickness of 50 μ were laminated using the melt extruded resin layer 6 of a polyethylene resin having a thickness of 30 μ.

Then, on the two surfaces of the biaxially stretched PET film,
A surface resin layer 7 made of a polyacrylonitrile resin film having a thickness of 30 μ is laminated by a dry lamination method,
Further, the back surface resin layer 8 made of a polyacrylonitrile resin film having a thickness of 50 μ is formed on the polyethylene film 5 surface.
Were laminated by a dry laminating method to obtain a non-adsorptive packaging material 1 which is an example product of the present invention.

Example 2 In the manufacturing process of the non-adsorptive packaging material 1 of Example 1, instead of the surface resin layer 7 made of a polyacrylonitrile resin film having a thickness of 30 μ, a linear saturated polyester resin having a thickness of 30 μ ( (Glass transition temperature: 81 ° C.), a linear saturated polyester resin having a thickness of 50 μ (glass transition temperature: 81 ° C.) is used instead of the backside resin layer 8 made of a polyacrylonitrile resin film having a thickness of 50 μ. Using the film, a non-adsorptive packaging material, which is another embodiment of the present invention, was obtained.

Example 3 The non-adsorptive packaging material obtained in Example 2 is wrapped around a mandrel so that the backside resin layer 8 of the non-adsorptive packaging material 1 is in contact with the mandrel to form a tubular packaging material. By sealing the side portions of each other, a tube container body made of a tubular molded body was obtained.

Next, the obtained tubular molded body which is the body of the tube container is mounted on a mandrel in a mold for injection molding, and is then connected to the neck of the thin neck and the lower end of the neck. The head portion of the tube container, which was formed integrally with the truncated cone-shaped shoulder portion, was molded by injection molding of polyacrylonitrile resin, and at the same time, was joined to the upper end portion of the cylindrical molded body.

Furthermore, after sealing the mouth and neck with a sealing material and capping, the ointment from the lower end of the tubular molded body is filled, and then the lower end of the tubular molded body is welded. An extruded tube container was obtained by forming a sealed part by using.

Example 4 The non-adsorptive packaging material obtained in Example 2 was wound around a mandrel so that the back surface resin layer of the non-adsorptive packaging material 1 was in contact with the mandrel, and formed into a tubular shape. The tube container body was obtained by sealing the sides.

Then, the obtained tubular molded body which is the body part of the tube container is mounted on a mandrel in a mold for injection molding, and is then connected to the neck and neck of the thin neck and the lower end of the neck and neck. A tube container head made of an integrally molded body with a frusto-conical shoulder is formed into a linear saturated polyester resin (glass transition temperature: 81
(C) injection molding, and at the same time, it was joined to the upper end of the cylindrical molded body.

Further, after sealing the mouth and neck with a sealing material and capping, the ointment from the lower end of the tubular molded body is filled, and then the lower end of the tubular molded body is welded. An extruded tube container was obtained by forming a sealed part by using.

[0025]

In the non-adsorptive packaging material of the present invention, the back surface resin layer in contact with the contents is made of polyacrylonitrile resin or linear saturated polyester resin having a glass transition temperature of 40 ° C. or more, and therefore, it has permeability. It has an excellent non-adsorption property even for contents containing high components, and
Since the melt-extruded resin layer of polyolefin resin is laminated in the laminated sheet, the texture is good and the flexibility without cracks is obtained.

Further, in the extruded tube container of the present invention, the inner peripheral surface layer of the tube container body is formed of a polyacrylonitrile resin or a linear saturated polyester resin having a glass transition temperature of 40 ° C. or higher.

Therefore, even if the contents in the tube container contain substances having high permeability such as active ingredients and dyes contained in medicines, etc., these substances having high permeability are not adsorbed. It does not permeate or penetrate, and has excellent storage characteristics.

Further, in the extruded tube container of the present invention, since the melt extruded resin layer of polyolefin resin is laminated in the laminated sheet forming the body of the tube container, the inner peripheral surface layer is hard and impermeable. Even if it is formed of the above resin, the soft texture is retained in the body of the tube container, and a good action is exerted in the extrusion performance.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an example of a non-adsorptive packaging material of the present invention.

[Explanation of symbols]

 1 Laminated sheet which is a non-adsorptive packaging material 3 Intermediate layer with metal foil 4 Melt extruded resin layer of polyolefin resin 5 Melt extruded resin layer of polyolefin resin 7 Surface resin layer 8 Backside resin layer

Claims (2)

[Claims] 1. A surface resin layer formed of a polyacrylonitrile resin or a linear saturated polyester resin having a glass transition temperature of 40 ° C. or higher, and a back surface resin layer formed of the same resin as the surface resin layer, An intermediate layer made of a metal foil laminated between these surface resin layer and back surface resin layer, between the intermediate layer and the surface resin layer, and between the intermediate layer and the back surface resin layer. A non-adsorptive packaging material comprising a laminated sheet having a melt-extruded resin layer of polyolefin resin interposed. 2. A tube container body is formed of a surface resin layer formed of a polyacrylonitrile resin or a linear saturated polyester resin having a glass transition temperature of 40 ° C. or higher, and the same resin as the surface resin layer. A backside resin layer, and an intermediate layer made of a metal foil laminated between the frontside resin layer and the backside resin layer, the intermediate layer and the frontside resin layer, and the intermediate layer and the backside surface. A laminated sheet in which a melt extruded resin layer of a polyolefin-based resin is interposed between the laminated resin sheet and the resin layer, and the back surface resin layer of the laminated sheet is formed so as to be an inner peripheral surface layer of the body portion. Extruded tube container.