JP2794455B2 - Laminated sheet for tube container and tube container using the laminated sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial application field" The present invention particularly relates to pastes for foods and medicines containing fragrances and vegetable oils by terpene-based hydrocarbons, and also for daily necessities and the like mixed with dyes. The present invention relates to a laminated sheet used for a container body when obtaining a tube container suitable for enclosing a shape, a paste for toothpaste, and the like, and a tube container provided with a container body made of the laminated sheet.

“Prior art” A tube container in which a fluid-semi-fluid filling material represented by a paste-like material is filled, a tube-shaped container body whose lower end is closed, and the tube-shaped container It is composed of a shoulder continuous with the upper end of the torso, a mouth and neck continuous with the shoulder, and a cap removably engaged with the mouth and neck. For the tube container in which the object is filled, excellent properties with respect to the gas barrier property are required, for example, a container body composed of a metal tube, or a polyolefin resin layer and a metal foil. 2. Description of the Related Art A tube container having a container body formed of a tube made of a laminated sheet is used.

"Problem to be Solved by the Invention" By the way, the conventional tube container having a metal tubular container body has excellent gas barrier properties due to the properties of the material of the container body. Depending on the type of filling material to be filled in the container, the metal that is the material of the container body is corroded, which may cause pinholes in the container body, or the pin may be squeezed out by the squeezing operation. It has disadvantages such as leakage of the filling from the hole.

Further, in a tube container having a container body made of a laminated sheet of a polyolefin-based resin layer and a metal foil, the polyolefin-based resin layer, which is an inner peripheral surface layer of the container body, contains a volatile oil and a fragrance. It is easy to be attacked by the substance, and lowers the quality of the filling, and also, the polyolefin resin layer absorbs the flavor component and the active ingredient contained in the filling, thereby maintaining the quality. There is also a problem in characteristics.

For this reason, a laminated sheet in which a low-crystalline polyester resin layer having a glass transition temperature of 40 ° C. or more, which has excellent effects on the holding properties of the flavor component (flavoring component) and the thermal adhesiveness, is laminated on the aluminum foil. A tube container in which the inner peripheral surface layer of the container body is formed of the low-crystalline polyester resin layer has begun to be conceived, but such a tube container has a texture of the container body due to the rigidity of the low-crystalline polyester resin. Becomes hard, not only has a problem in the extruding handleability that the extruding operation of the filling material is not easy, but also the adhesion of the low crystalline polyester resin to the aluminum foil is poor,
Further, when using an adhesive for lamination between the aluminum foil and the low-crystalline polyester resin layer, depending on the type of filling in the tube container, the adhesive may be attacked, It has disadvantages such as insufficient adhesion strength between the two.

On the other hand, the first to fifth inventions are particularly applicable to pastes such as foods and medicines containing fragrances and vegetable oils by terpene hydrocarbons, and daily necessities and the like in which dyes are mixed. This is a laminated sheet for forming the container body, which can provide a tube container without deteriorating the quality characteristics of the filling even when paste or toothpaste for toothpaste is loaded. A sixth aspect of the present invention is to provide a laminated sheet that has a soft texture that can be easily operated, has excellent interlayer adhesive strength of the laminated sheet, and is free from a fear of delamination. A tube container obtained by using the laminated sheet, in particular, a paste for foods and medicines containing fragrances and vegetable oils based on terpene-based hydrocarbons, and also for daily necessities and the like in which a dye is mixed. Not only can be stored without deteriorating the quality of the product, toothpaste, etc., but also the operation of pushing out the filling material is smooth, and there is no risk of delamination occurring in the laminated sheet portion of the container body. The present invention provides a good tube container.

[Means for Solving the Problems] The laminated sheet for a tube container of the first invention has a surface layer composed of a low-crystalline polyester resin layer having a glass transition temperature of 40 ° C. or higher, and a glass transition temperature of 40 ° C. It has a laminated structure of a back layer made of the above low crystalline polyester resin layer and an intermediate layer located between the front layer and the back layer.

In the laminated sheet for a tube container of the first invention, the intermediate layer is a thermoplastic synthetic resin layer having dimensional stability / a polyolefin resin layer having a carboxyl group / aluminum foil / The intermediate layer and a low-crystalline polyester resin layer having a glass transition temperature of 40 ° C. or higher, which are the intermediate layer and the surface layer, are formed of a laminated structure including a polyolefin-based resin layer having a carboxyl group. Are laminated so as to be bonded between the dimensionally stable thermoplastic synthetic resin layer and the surface layer.

The laminated sheet for a tube container according to the second aspect of the present invention is the laminated sheet for a tube container according to the first aspect, wherein the low crystalline polyester resin layer having a glass transition temperature of 40 ° C. or more is formed of ethylene glycol and terephthalic acid. It is formed of a resin made of a terpolymer with isophthalic acid.

Further, the laminated sheet for a tube container of the third aspect of the present invention is the laminated sheet for a tube container of the first or second aspect of the present invention, wherein the polyolefin resin layer having a carboxyl group has ethylene and It is formed of a resin mainly composed of a copolymer resin of acrylic acid or methacrylic acid.

Further, the laminated sheet for a tube container of the fourth invention is the laminated sheet for a tube container of the first invention or the second invention, wherein the polyolefin-based resin layer having a carboxyl group is ethylene. And acrylic acid or methacrylic acid and methyl (meth) acrylate,
It is formed of a resin mainly composed of a copolymer resin of ethyl (meth) acrylate or butyl (meth) acrylate.

The laminated sheet for a tube container according to the fifth aspect of the present invention is the laminated sheet for a tube container according to the first, second, third, or fourth aspect of the present invention, wherein the back surface layer comprises a low-crystalline polyester resin layer. The surface of the polyolefin-based resin layer having a carboxyl group on which is laminated is subjected to a flame treatment or a corona discharge treatment.

Furthermore, the tube container according to the sixth aspect of the present invention includes a tube-shaped container body having a closed lower end, a shoulder continuous with an upper end of the tube-shaped container body, and a shoulder. A tube container with a continuous mouth and neck, and a cap removably engaged with the mouth and neck,
The shoulder portion and the mouth and neck portion continuous with the shoulder portion are formed of a molded body made of a polyester resin having a glass transition temperature of 40 ° C. or more, and the container body is formed of the present invention. To the tube sheet according to any one of the fifth aspect of the present invention, wherein the back surface layer of the laminated sheet is formed as a container inner peripheral layer.

In the laminated sheet for the tube container of the first to fifth aspects of the present invention having the above-described configuration, and the laminated sheet used for the container body of the tube container of the sixth aspect of the present invention, Is formed of a low crystalline polyester resin layer having a glass transition temperature of 40 ° C. or higher,
In an atmosphere at a temperature equal to or lower than the glass transition temperature of the resin, the resin exerts an excellent effect on perfume resistance.

When the thickness of the low-crystalline polyester resin layer having a glass transition temperature of 40 ° C. or more is 5 μm or less, the stability of the resin layer is deteriorated, and the sealing performance of the obtained heat-welded portion may be reduced. Further, when it exceeds 50μ, the laminated sheet becomes hard, and a good body of the container cannot be obtained, so that the surface layer and the back surface layer are formed to a thickness of about 5 to 50μ. Is preferred.

The front layer and the back layer are formed of a low-crystalline polyester resin or an amorphous polyester resin having a low crystallinity, specifically, a crystallinity of 10% or less, and are formed at a low temperature. Having a stable heat-welding property.

The polyester resin layer of low crystallinity in the laminated sheet, that is, the front layer and the back layer in the laminated sheet, for example, ethylene glycol, 1,4-butanediol, alcohol component such as 1,4-cyclohexane dimethanol And a resin such as a co-condensed polymer of an aliphatic dicarboxylic acid such as adipic acid and sebacic acid, and a dicarboxylic acid component such as an aromatic dicarboxylic acid such as terephthalic acid, isophthalic acid and diphenylcarboxylic acid. There are specifically, a co-condensation polymer of ethylene glycol, isophthalic acid and terephthalic acid, a co-condensation polymer of 1,4-cyclohexanedimethanol, ethylene glycol and terephthalic acid, and two types of dialcohols A polyester resin layer of a co-condensed polymer of a component and two kinds of dicarboxylic acid components It is suitable.

In the low-crystalline polyester resin, in the case of a cocondensation polymer in which the aliphatic dicarboxylic acid component in the acid component is 10% by weight or more, the perfume resistance of the polyester resin layer tends to decrease. Therefore, it is preferable to use a polyester resin of a co-condensation polymer in which the aliphatic dicarboxylic acid component in the acid component is 10% by weight or less for the back layer.

In the laminated sheet, the thermoplastic synthetic resin layer having dimensional stability in the intermediate layer includes, for example, a biaxially stretched polyester film, a biaxially stretched polyamide film, a biaxially stretched polypropylene film, and an ethylene-vinyl alcohol copolymer. A united resin film, and further, for the above film, a laminated sheet obtained by laminating a thermoplastic synthetic resin such as a polyolefin resin or paper or the like is used in a thickness of about 5 to 200 μm. A printed pattern for obtaining the effect is used.

Further, the polyolefin resin layer having a carboxyl group in the intermediate layer is, for example, a copolymer of ethylene and a carboxylic acid monomer such as acrylic acid or methacrylic acid, or ethylene and acrylic acid or Carboxylic acid monomers such as methacrylic acid and methyl (meth) acrylate, ethyl (meth) acrylate, or (meth)
It is formed of a terpolymer with butyl acrylate, and furthermore, in addition to the above components, for example, a resin or the like to which other monomers such as vinyl acetate are added as a minor component. It is formed to have a size of about 5 to 200 μm.

In addition, in forming the polyolefin resin layer having a carboxyl group, it is preferable to use a polyolefin resin containing about 3 to 25 mol% of a monomer having a carboxyl group.

Further, the aluminum foil in the intermediate layer has a sufficient gas barrier property exhibited by the aluminum foil, and is required to have flexibility. Therefore, the thickness is about 5 to 100 μm. Is used.

In the laminate constituting the intermediate layer,
The dimensionally stable thermoplastic synthetic resin layer and the polyolefin-based resin layer having a carboxyl group are bonded with, for example, a urethane-based adhesive. When the surface of the synthetic resin layer has good adhesiveness to the polyolefin-based resin, the two can be laminated without interposing an adhesive.

In addition, there is no need to use an adhesive for lamination between the aluminum foil and the polyolefin-based resin layer having a carboxyl group. It is more preferable that both of them are directly laminated because there is no decrease in the adhesive strength between the layers due to the influence of the fragrance or the like included in the filling in the tube container.

Further, for lamination between the dimensionally stable thermoplastic synthetic resin layer in the intermediate layer and the low-crystalline copolymerized polyester resin layer as the surface layer, for example, it is preferable to use a polyurethane-based adhesive. .

Further, the polyolefin-based resin layer having a carboxyl group in the intermediate layer, and the low-crystalline copolymerized polyester resin layer as the back layer, the polyolefin-based resin layer having a carboxyl group in the intermediate layer By introducing a flame treatment or a corona discharge treatment on the surface, the laminate is directly laminated, and the adhesive strength between the layers may be reduced due to the effect of the fragrance and the like included in the filling in the tube container. No good laminated structure can be obtained.

Furthermore, in the laminated sheet for a tube container of the first to fifth inventions, a portion between the surface layer and the back surface layer of the laminated sheet at the body sticking portion in the container body or the lower end closing portion of the container body. It is preferable that the front surface layer and the back surface layer are formed of the same copolyester resin so that a strong joint can be formed in the heat-welded portion formed in step (1).

The tube container according to the sixth aspect of the present invention comprises a tubular container body obtained by using the laminated sheet for a tube container according to the first to fifth aspects, and a polyester having a glass transition temperature of 40 ° C. or more. The head of the mouth and neck portion and the shoulder portion formed of a resin molded body, and a separate cap that is removably engaged with the mouth and neck portion, and the head of the shoulder and the mouth and neck portion is formed. As described above, it is formed of a molded article of a polyester resin having a glass transition temperature of 40 ° C. or higher, and has excellent fragrance retention properties.

Incidentally, the shoulder and the mouth and neck, as long as it is formed of a molded body of a polyester resin having a glass transition temperature of 40 ° C. or more, even if it is a crystalline resin such as polyethylene terephthalate resin, Alternatively, a low crystalline polyester resin similar to the resin of the front layer and the back layer in the laminated sheets of the first to fifth inventions may be used.

The shoulder and the mouth and neck in the tube container of the sixth invention obtained by using the laminated sheet for the tube container of the first to fifth inventions have a glass transition temperature of 40 ° C. It may be an integrated molded article molded from the above-mentioned saturated polyester resin, or may be a combined joined article of the individual molded articles of the shoulder and the mouth and neck made of the resin. From the relationship,
It is preferable to use an integrally molded article of a saturated polyester resin having a glass transition temperature of 40 ° C. or higher.

The container body in the tube container according to the sixth aspect of the present invention may be formed by punching and forming a blank sheet from the laminated sheet for a tube container according to the first to fifth aspects of the present invention. It is easily formed by overlapping the right side portions and bonding the side portions by heating and pressing.

"Examples" Hereinafter, specific configurations of the laminated sheet for a tube container and the tube container of the present invention will be described with reference to examples.

Example 1 In FIGS. 1 and 2, a biaxially stretched polyester film "Toyobo Ester Film E-5100 [Toyobo Co., Ltd.]" having a backprint layer m, m by a gravure printing method is provided. A laminated sheet to be used for the dimensionally stable thermoplastic synthetic resin layer 4 with the layer 3 of “12 μ” / polyurethane-based adhesive / low-density polyethylene resin “Mirason 16p [Mitsui Petrochemical]: 100 μm thick” was prepared. Thereafter, the surface of the low-density polyethylene resin layer 3 of the thermoplastic synthetic resin layer 4 and the aluminum foil 5 having a thickness of 20 μm are combined with a polyolefin resin “New” having a 30 μm-thick carboxyl group between them. Cler AN-4213c "Mitsui DuPont Polychemical Co., Ltd."] layer 6 is laminated while being extruded and interposed, and the aluminum foil 5 is provided with a 50 .mu.m thick carboxyl group. By coating extruded polyolefin resin "Nucrel N-0908c" Mitsui Du Pont Polychemical Co., Ltd. "] layer 7 that, to obtain a laminate comprising an intermediate layer 8.

Next, a low-crystalline polyester resin “crystallinity 0” is applied to the two surfaces of the biaxially stretched polyester film in the intermediate layer 8 of the laminate via a polyurethane adhesive.
%, A glass transition temperature of 72 ° C., and a sealer PT [Mitsui DuPont Polychemical Co., Ltd.] extrudes and laminates a surface layer 9 having a thickness of 30 μm. The polyolefin-based resin layer 7 having a carboxyl group has After the surface of the resin layer 7 is subjected to corona discharge treatment, a low-crystalline polyester resin “0% crystallinity, glass transition temperature 72 ° C., sealer PT [Mitsui DuPont Polychemical Co., Ltd.]” is extruded and laminated. In this way, a back layer 10 having a thickness of 50 μm was formed, and a laminated sheet for a tube container, which is indicated by reference numeral 1 in FIG.

Further, using a blank plate obtained by stamping the laminated sheet 1, a cylindrical body serving as a tube-shaped container body having a diameter of 35 mm and a height of 150 mm in which the back surface layer 10 of the laminated sheet 1 is an inner peripheral surface layer 11 was obtained by overlapping the left and right side portions of the blank plate with each other and thermally bonding the front surface layer 9 and the back surface layer 10 in the laminated sheet 1.

Subsequently, after the cylindrical body 11 is inserted into a mold, a head formed of an integrally formed body of a narrow neck mouth-neck portion 12 and a truncated conical shoulder portion 13 continuous with a lower end portion of the mouth-neck portion 12. 14 was formed by injection molding using a polyethylene terephthalate resin “PET J125: glass transition temperature 57 ° C. [Mitsui Pet Resin Co., Ltd.]”. Thereafter, the mouth and neck 12 is sealed with a sealing material, and further, from the lower end of the cylindrical body 11,
After filling with 200 g of orange fruit sauce, a sealing portion S is formed at the lower end portion by heat welding and bonding, thereby forming a product according to the sixth embodiment of the present invention indicated by reference numeral 15 in FIG. A tube container was obtained.

Comparative Example 1 Laminated sheet 1 for a tube container in Example 1
In the laminated structure of Example 1, except that the front surface layer 9 and the back surface layer 10 are each formed of a low-density polyethylene resin “Mirason 16p [Mitsui Petrochemical Industry]”, the laminated sheet 1 for a tube container in Example 1 described above. A laminated sheet for a tube container for comparison having the same configuration as that of the corresponding part was formed.

Subsequently, using a laminated sheet for a tube container for comparison, a cylindrical body whose back layer is the inner circumferential surface layer of the tube is formed, and the mouth and neck portion of the narrow neck and the mouth are formed. A head made of an integrally molded body with a frusto-conical shoulder continuous to the lower end of the neck was formed by injection molding with a low-density polyethylene resin "Mirason 16p [Mitsui Petrochemical]". According to the method of
A tube container for comparison filled with 200 g of orange fruit sauce was obtained.

Comparative Example 2 Laminated sheet 1 for a tube container in Example 1
In the laminated structure of the above, the thickness of the surface layer 9 is
The thickness of 10 is set to 100μ, and the thickness in the laminated structure is 30μ.
Except for removing the polyolefin-based resin layer 6 having a carboxyl group and the polyolefin-based resin layer 7 having a 50 μm-thick carboxyl group, the laminated sheet for the tube container in the above-mentioned Example 1 was all used. A laminated sheet for a tube container for comparison having the same configuration as that of the corresponding part of No. 1 was formed.

Subsequently, using the laminated sheet for a tube container for comparison, a tube for comparison filled with 200 g of an orange fruit sauce was prepared in the same manner as the corresponding part of Example 1 below. A container was obtained.

[Experiment] After storing each of the tube containers obtained in Example 1 and Comparative Examples 1-2 at room temperature of 20 ° C for one month, the taste and aroma of the orange fruit sauce in the filling were determined. The organoleptic test showed that the fillings in the tube containers of Example 1 and Comparative Example 2 maintained the aroma and taste of orange and had good flavor retention, but the tube in Comparative Example 1 Almost no orange scent remained in the filling in the container.

Further, after the tube containers were broken and washed, the odor of the inner peripheral layer of each tube container was examined. The tube containers of Example 1 and Comparative Example 2 were almost odorless.
The orange fragrance remained in the tube container of Comparative Example 1, and it was confirmed that the fragrance of the orange fruit sauce was adsorbed on the inner peripheral surface layer of the tube container.

Further, when the suitability of squeezing out the orange fruit sauce from each of the tube containers was tested, the tube containers of Example 1 and Comparative Example 1 had a flexible container body,
Although the squeezing operation was good, in the tube container of Comparative Example 2, the texture of the container body was hard, the squeezing operation was not smooth, and the squeezing suitability was poor.

 The results of the experiment are collectively shown in Table 1.

"Function and Effect of the Invention" The laminated sheet for a tube container of the first invention has a surface layer composed of a low-crystalline polyester resin layer having a glass transition temperature of 40 ° C or higher, and a surface layer having a glass transition temperature of 40 ° C or higher. In a laminated sheet for a tube container having a laminated structure of a back layer made of a low-crystalline polyester resin layer and an intermediate layer located between the front layer and the back layer, the intermediate layer has dimensional stability. It has a laminated structure of a certain thermoplastic synthetic resin layer / polyolefin resin layer having a carboxyl group / aluminum foil / polyolefin resin layer having a carboxyl group. The layers are laminated so as to be bonded between the dimensionally stable thermoplastic synthetic resin layer and the surface layer in the intermediate layer.

The laminated sheet for a tube container of the second invention is the laminated sheet for a tube container of the first invention, wherein the low-crystalline polyester resin layer having a glass transition temperature of 40 ° C. or more is formed of ethylene glycol and ethylene glycol. It is composed of a resin layer of a terpolymer of terephthalic acid and isophthalic acid.

Further, the laminated sheet for a tube container of the third invention is a laminated sheet for a tube container of the first invention,
Alternatively, in the laminated sheet for a tube container of the second invention, the polyolefin-based resin layer having a carboxyl group is constituted by a resin layer mainly composed of a copolymer of ethylene and acrylic acid or methacrylic acid. Is what it is.

Further, the laminated sheet for a tube container of the fourth invention is the laminated sheet for a tube container of the first invention,
Alternatively, in the laminated sheet for a tube container of the second invention, the polyolefin-based resin layer having a carboxyl group comprises ethylene, acrylic acid or methacrylic acid, methyl (meth) acrylate, and (meth) acrylic. It is composed of a resin layer mainly composed of a terpolymer with ethyl acid or butyl (meth) acrylate.

Furthermore, the laminated sheet for a tube container according to the fifth aspect of the present invention is the laminated sheet for a tube container according to any one of the first to fourth aspects, wherein the glass transition temperature is 40 ° C. or more. The surface of the polyolefin-based resin layer having a carboxyl group on which the back layer composed of the low-crystalline polyester resin layer is to be laminated has been subjected to a flame treatment or a corona discharge treatment.

Thus, the container body obtained by using the laminated sheet for the tube container of the first to fifth aspects of the present invention is such that the inner peripheral surface layer of the container body has a glass transition temperature of 40 ° C. or more. Since it is formed of a low crystalline polyester resin layer,
In an atmosphere at a temperature equal to or lower than the glass transition temperature of the polyester resin forming the resin layer, excellent fragrance resistance,
And, exhibit vegetable oil maintenance properties and the like, for example,
Orange jam, lemon essence, toothpaste, shoe dirt, hair dyes, etc., especially foods and pharmaceuticals containing terpene hydrocarbon flavors and vegetable oils, and pastes from daily necessities mixed with dyes Even when the material is filled, the quality characteristics of the filled material are not degraded, and an extremely excellent action in storage performance is achieved.

Further, in the tubular container body obtained by using the laminated sheet, the heat-welded portion between the surface layer and the back surface layer of the laminated sheet has a low crystallinity polyester resin and the same glass transition temperature. Is formed as a heat-welded portion between the low-crystalline polyester resin layer of 40 ° C. or more, and an adhesive portion such as a body sticking portion of a tubular container body or a closed portion of the container bottom, for example, 120 Under the conditions of mild heat and pressure bonding, such as up to 160 ° C., it is possible to achieve the function and effect of being able to form stably.

In addition, the surface layer and the back surface layer of the tube-shaped container body have properties excellent in hot-press bonding properties, so that the body-attached portion of the tube-shaped container body has
As shown in FIG. 3, a low-crystalline polyester resin forming the back layer of the laminated sheet located on the body outer peripheral surface side,
A state in which the low-crystalline polyester resin forming the front and back layers of the laminated sheet located on the inner peripheral surface side of the trunk flows, and the polyester resin covers the end surface of the laminated sheet located on the inner peripheral surface side of the trunk. Is formed, so that the end faces of the intermediate layer incorporated in the laminated sheet and the adhesive layer between the layers do not become exposed inside the container, and the intermediate material is filled in the tube container. It is possible to obtain a good heat-bonded portion without the risk that the gas barrier layer in the layer is corroded, or the bonding strength of the heat-bonded portion in the body of the container is reduced.

Furthermore, the laminated sheet for a tube container of the present invention is one in which a soft feeling is exhibited by the presence of the polyolefin-based resin layer having a carboxyl group in the laminated sheet. Thus, a tube container body having an excellent function is formed.

Further, the polyolefin-based resin layer having a carboxyl group in the laminated sheet for a tube container of the present invention has good adhesion to an aluminum foil, and includes an aluminum foil as a gas barrier layer. In a tube container with a laminated sheet for a tube container, there is no fear that delamination occurs due to a flavor component included in the filling in the tube container, and
The polyolefin-based resin layer having a carboxyl group can be satisfactorily laminated without using an adhesive also in lamination with a low-crystalline polyester resin layer which is a back surface layer. By the flavor component included in the filling in the container, there is no fear that delamination occurs between the back surface layer and the polyolefin-based resin layer having a carboxyl group, and a good quality tube container It becomes.

Further, in the sixth invention, a tubular container body having a closed lower end portion, a shoulder portion continuous with the upper end portion of the tubular container body portion, and a shoulder portion continuous with the shoulder portion. A mouth and neck, and a tube container comprising a cap which is removably engaged with the mouth and neck, wherein the shoulder and the mouth and neck continuous with the shoulder have a glass transition temperature of 40 ° C. The container body is formed of the above-mentioned polyester resin, and the container body is formed by the laminated sheet for a tube container according to any one of the first to fifth aspects of the present invention. Is formed so as to be a container inner peripheral layer.

Thus, in the tube container according to the sixth aspect of the present invention, the tube container made of synthetic resin combined with the container body obtained by the laminated sheet for the tube container according to any one of the first to fifth aspects of the present invention. The head is made of a molded body of a polyester resin having a glass transition temperature of 40 ° C. or more,
The inner peripheral layer of the tube-shaped container body, and the polyester resin forming the head, in an atmosphere at a temperature equal to or lower than the glass transition temperature of these resins, has excellent perfume resistance properties, and vegetable oil maintenance properties, etc. It has a very excellent effect on the storage performance that can be stored without deteriorating the quality characteristics of the filling.

Further, in the tube container according to the sixth aspect of the present invention, since the surface layer and the back surface layer of the container body are each formed of a low-crystalline saturated polyester resin, the heat-sealing sealing portion in the tube-shaped container body is provided. However, under mild heat and pressure bonding conditions,
In addition, it has an effect and an effect that it can be formed stably.

[Brief description of the drawings]

FIG. 1 is a model cross-sectional view showing one embodiment of a laminated sheet for a tube container of the present invention, FIG. 2 is a model cross-sectional view showing one embodiment of a tube container of the present invention, and FIG. FIG. 2 is a model cross-sectional view showing a state in which a container body is adhered to the container body by the laminated sheet shown in FIG. 1. DESCRIPTION OF SYMBOLS 1 ... Laminated sheet for tube container 4 ... Dimensionally stable thermoplastic synthetic resin layer 5 ... Aluminum foil 6 Polyolefin-based resin layer having carboxyl group 7 ... Caboxyl group A polyolefin resin layer comprising: 8 ... an intermediate layer, 9 ... a surface layer, 10 ... a back layer, 12 ... a neck and neck portion of a narrow neck, 13 ... a frustoconical shoulder portion, 15 ... Tube container, S: Sealing part at lower end.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B32B 15/08 B32B 27/36 B65D 35/08

Claims (6)

(57) [Claims] 1. A surface layer comprising a low-crystalline polyester resin layer having a glass transition temperature of 40 ° C. or higher, a back layer also comprising a low-crystalline polyester resin layer having a glass transition temperature of 40 ° C. or higher, and In a laminated sheet for a tube container having a laminated structure with an intermediate layer positioned between the back layer and the intermediate layer, the intermediate layer is a thermoplastic synthetic resin layer having a dimensionally stable / polyolefin type having a carboxyl group. The intermediate layer and the surface layer are formed of a laminated structure composed of a resin layer / aluminum foil / a polyolefin-based resin layer having a carboxyl group, and the intermediate layer and the surface layer have a dimensionally stable thermoplastic composition. A laminated sheet for a tube container, which is laminated so as to be bonded between a resin layer and a surface layer. 2. The low-crystalline polyester resin layer having a glass transition temperature of 40 ° C. or higher is a resin layer of a terpolymer of ethylene glycol, terephthalic acid and isophthalic acid. Laminated sheet for tube containers. 3. The polyolefin resin layer having a carboxyl group is a resin layer mainly composed of a copolymer of ethylene and acrylic acid or methacrylic acid. Laminated sheet for tube containers. 4. A polyolefin-based resin layer having a carboxyl group comprises ethylene, acrylic acid or methacrylic acid, methyl (meth) acrylate, ethyl (meth) acrylate, or butyl (meth) acrylate. 3. The laminated sheet for a tube container according to claim 1, which is a resin layer mainly composed of a terpolymer according to claim 1. 5. The surface of a polyolefin-based resin layer having a carboxyl group, on which a back layer composed of a low-crystalline polyester resin layer having a glass transition temperature of 40 ° C. or higher is laminated, is subjected to a flame treatment or a corona discharge treatment. The laminated sheet for a tube container according to any one of claims 1 to 4, wherein the laminated sheet is used. 6. A tubular container body with a closed lower end, a shoulder continuous with the upper end of the tubular container body, and a mouth and neck portion continuous with the shoulder. In a tube container comprising a cap removably engaged with the mouth and neck, the shoulder and the mouth and neck continuous with the shoulder are formed of a polyester resin having a glass transition temperature of 40 ° C. or higher. And the container body is formed of one of the claims 1 to 5.
A tube container characterized by being formed by using the laminated sheet for a tube container according to any one of the preceding items, so that a back surface layer of the laminated sheet becomes an inner peripheral surface layer of the container.