JPH0252731A - Mounting method for extracting tool at time of molding or paper vessel - Google Patents

Abstract

PURPOSE:To give properties excellent in flavor characteristics to a paper vessel, and to prevent the generation of a crack in the thin section of an extracting tool by inserting the extracting tool made of a polyolefin resin with a flange section into an opening section from the inside of a cylindrical body and welding and fixing the flange section of the extracting tool to an interposing member in the cylindrical body. CONSTITUTION:An interposing member (e) is welded and fastened in a section along an opening section 24 in a blank plate 25 to the rear layer 23 of the blank plate. The interposing member (e) is broken from the surface layer 22 side of the blank plate 25, and a section surrounded by the easy break line (d) of the interposing member (e) is separated and removed, thus acquiring the blank plate in which the interposing member (e) is laminated only on the section along the peripheral section of the opening section 24. A pair of oppositely faced side sections of the blank plate are overlapped mutually, a copper-clad bonding section is formed through heat under pressure, and a square cylindrical body, an inner circumferential surface of which is shaped by the rear layer 23, that is, a linear saturated polyester resin layer, of the blank plate, is acquired. A closed-end cylindrical body D in an extracting tool F is inserted from the inner circumferential surface side of the square cylindrical body, and the flange section C of the closed-end cylindrical body D is fixed to the rear layer (b) of the interposing member (e) by ultrasonic sealing.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a paper container that does not alter the quality of the filling, that is, a paper container that has excellent quality retention properties, and The present invention relates to a method for attaching a separate pouring tool made of polyolefin resin when molding a paper container equipped with the pouring tool.

[Conventional technology]

A pouring tool made of polyolefin resin is inserted from the inside of the paper container into an opening made in the paper container, and a flange portion of the pouring tool is fixed to the inner peripheral surface of the paper container. Paper containers are widely used as paper containers for liquids filled with beverages and the like.

The paper container is made of a paper container laminated sheet whose front and screen forming layers are composed of a polyolefin resin layer, and the flange of the pouring tool is thermally bonded to the inner circumferential surface layer of the paper container. It is common to have a similar configuration.

[Problem to be solved by the invention]

By the way, in the conventional paper containers, the polyolefin resin is exposed to heat during the formation of the polyolefin resin layer when obtaining the laminated sheet, which is the material for forming the paper container, and when forming the paper container using the laminated sheet. When decomposed, volatile components such as aliphatic hydrocarbons are generated, and these volatile components migrate into the filling contained in the paper container, causing the filling to have an odd taste or odor. Not only is this a factor in the occurrence of this, but also the polyolefin resin layer that is the inner peripheral surface layer of the paper container easily adsorbs and permeates flavor components in the inner filling such as Orange Genie. However, it has drawbacks such as the fact that it tends to spoil the flavor of the filling material.

Therefore, as a paper container having excellent properties for retaining flavor components, the inner peripheral surface layer of the paper container is made of linear saturated polyvarnish f/' resin FW with a glass transition temperature of 40'C or higher.
Paper containers composed of a ethylene-vinylalunyl copolymer resin layer have begun to be considered.

Therefore, for paper containers that have the ability to retain flavor components, the linear saturated polyester resin that has thermal adhesion properties with the inner peripheral surface layer of the paper container is an ethylene-vinyl alcohol copolymer resin. When we tried to apply a pouring tool made of an integrally molded body, we found that the former pouring tool made of linear saturated polyester resin had high rigidity of the linear saturated polyester resin, which is the raw material for molding, and cracks occurred in the thin wall part. ,
Furthermore, in the case of a dispensing tool with a bull ring, there are drawbacks such as the fact that it is impossible to form an opening with the bull ring, and the latter dispensing tool made of ethylene-vinyl alcohol copolymer resin is However, the crystallization rate of the ethylene-vinyl alfur copolymer resin, which is a raw material for molding, is fast, and this causes the same disadvantages as in the case of the pouring tool made of the linear saturated polyester resin.

On the other hand, the methods of the present invention No. 1 and No. 2 have excellent flavor properties, do not cause cracks in the thin wall portion of the pouring tool, and have a bull ring. In the case of a pouring tool, a polyolefin resin pouring tool that has the effect of smoothly forming an opening with a bull ring is firmly and integrally fixed between the inner circumference layer of the paper container. The present invention provides a method for attaching the polyolefin resin pouring tool when molding a container.

[Means to solve the problem]

The method of attaching the pouring tool of the actual invention is to attach the spouting tool to the opening of the cylindrical body obtained by forming the body sticking part with a paper container blank plate formed by punching and forming a paper container laminated sheet into a predetermined outer shape. , a separately made polyolefin resin pouring tool is inserted from the inside of the cylindrical body, and a flange portion of the spouting tool is welded to the inner circumferential surface of the cylindrical body, and the spouting tool is fixed. The bottom of the container is formed on the cylindrical body, and the top of the container is formed after the filling operation, resulting in the final molded paper container, such as a Goebel top type or brick type. O The method for attaching the pouring tool when molding the paper container of the first invention is as follows: A blank board for paper containers made of a laminated sheet for paper containers, comprising a back layer made of a linear saturated polyester resin having a transition temperature of 40''C or more, a surface layer made of a linear saturated polyester resin, and a back layer made of a polyolefin resin. The intervening member is made of a laminated sheet comprising: and an intervening member having an easy-to-break line formed at a position corresponding to the outline of the opening in the blank plate.

The first step of the first method of the present invention is to punch out a laminated sheet for a paper container into a blank board having a predetermined approximately rectangular outline shape, and to create an opening for inserting a pouring tool into the blank board. The purpose is to obtain a blank plate for a paper container having an opening for inserting a pouring tool.

In the subsequent second step, the intervening member is applied to the linear saturated polyester resin layer having a glass transition temperature of 40° C. or higher, which is the back layer of the paper container blank plate obtained in the first step.
A linear saturated polyester resin layer having a glass transition temperature of 40° C. or higher, which is a surface layer of the intervening member, and a back layer of the paper container laminated sheet so as to close the opening formed in the blank board. The intervening member is brought into contact with the intervening member by welding ability between the back layer of the blank board and the surface layer of the intervening member at a portion along the periphery of the opening in the blank board. The member is bonded and fixed to the back layer of the blank board.

Furthermore, in the third step, a portion of the intervening member fixed to the blank plate surrounded by the easy-to-break line is
By removing the easily broken line formed on the intervening member, only the portion along the periphery of the opening in the blank plate is covered with 7 in a polyolefin resin pouring tool to be used in a subsequent process. A blank plate is obtained in which an intervening member having a shape that substantially matches the flange portion is laminated.

In the fourth step, a pair of opposing sides of the blank board for a paper container obtained in the third step, that is, the blank board to which the intervening member is fixed only to the portion along the periphery of the opening. By adhering the parts, a cylindrical body whose inner peripheral surface layer is constituted by the back layer of the paper container laminated sheet is obtained.

In the fifth and final step, a polyolefin resin pouring tool having a flange portion is inserted into the opening from inside the cylindrical body obtained in the fourth step, and the flange portion of the pouring tool is inserted into the opening. welded to the intervening member in the cylindrical body,
By fixing, a cylindrical body to which the pouring tool is welded and fixed is obtained.

In addition, the method for attaching the pouring tool when molding the paper container according to the invention of wooden tablet 2 includes a surface layer made of polyolefin resin,
A blank board for a paper container made of a laminated sheet for a paper container, comprising an intermediate layer containing a gas barrier layer and waste paper in a laminated structure, and a back layer made of an ethylene-vinyl alcohol copolymer resin; An interposition consisting of a laminated sheet comprising a surface layer made of an alcohol-based copolymer resin and a back layer made of a polyolefin-based resin, and in which an easy-to-break line is formed at a position corresponding to the outline of the opening in the blank plate. It uses members.

The first step of the method according to the invention of wooden tablet 2 is to punch out a laminated sheet for a paper container into a blank board having a predetermined approximately rectangular outline shape, and to form an opening for inserting a pouring tool into the blank board. This is to obtain a blank plate for a paper container having an opening for inserting a pouring tool.

In the subsequent second step, the intervening member is formed on the ethylene-vinyl alcohol copolymer resin layer, which is the back layer of the blank board for paper containers obtained in the first step. In addition, to block the opening that is
The ethylene-vinyl alcohol copolymer resin layer serving as the surface layer of the intervening member and the back layer of the paper container laminated sheet are brought into contact with each other, and along the periphery of the opening in the blank plate. In some parts, the intervening member is bonded and fixed to the back layer of the blank board by the welding ability between the back layer of the blank board and the surface layer of the intervening member.

Furthermore, in the third step, a portion of the intervening member fixed to the blank plate surrounded by the easy-to-break line is
By using the easy-to-break line formed on the intervening member to remove it, a polyolefin resin pouring tool to be used in a subsequent process is applied only to the portion along the periphery of the opening in the blank plate. This is a struggle to obtain a blank plate on which an intervening member having a shape that substantially matches the flange portion is laminated.

In the fourth step, a pair of opposing sides of the blank board for paper containers obtained in the third step, that is, the blank board to which the intervening member is fixed only to the portion along the periphery of the opening. By adhering the parts, a cylindrical body whose inner peripheral surface layer is constituted by the back layer of the paper container laminated sheet is obtained.

In the fifth and final step, a polyolefin resin pouring tool having seven launch parts is inserted into the opening from inside the cylindrical body obtained in the fourth step. welding the launch portion to the intervening member in the cylindrical body;
By fixing, a cylindrical body to which the pouring tool is welded and fixed is obtained.

In the laminated sheet for a paper container used in the method for attaching a pouring tool according to the invention of wooden tablet 1, the back layer of the laminated sheet, that is, the linear saturated polyester resin layer that becomes the inner peripheral surface layer of the obtained paper container is made of glass. In relation to the fact that the filling inside a paper container is normally placed in an atmosphere of less than 40°C because it exhibits excellent fragrance retention performance at a temperature below the transition temperature, the above-mentioned The back layer is composed of a linear saturated polyester resin having a glass transition temperature of 40°C or higher so as to have excellent fragrance retention performance.

In addition, when the linear saturated polyester resin layer is formed of a low-crystalline resin, for example, with a crystallinity of 10% or less, the filling material such as orange juice in the paper container obtained can be The thermal adhesion properties of the linear saturated polyester resin layer do not deteriorate even when heated during hot filling, and the thermal adhesion of the sealed portion formed after the filling operation of the inner filler by hot filling is maintained. Excellent adhesive strength can also be obtained.

The linear saturated polyester resin having a glass transition temperature of 40° C. or higher and constituting the back layer is, for example, ethylene glycol or propylene glycol.

Alcohol components such as 1,4-butanediol and 1,4-dicyclohexane dimetatool, aliphatic dicarboxylic acids such as adipic acid and sebacic acid, and aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, and diphenylcarboxylic acid. dicarboxylic acid components, specifically ethylene glycol and terephthalic acid, ethylene glycol and isophthalic acid and terephthalic acid, 1,4-dicyclohexanedimetatool, isophthalic acid and terephthalic acid, propylene glycol, isophthalic acid and terephthalic acid, etc. cocondensation polymers can be used, but if the aliphatic dicarboxylic acid component in the acid component is 1
In the case of a cocondensate having a content of 0% by weight or more, the fragrance retention performance of the inner skin layer made of a linear saturated polyester resin having a glass transition temperature of 40° C. or higher tends to deteriorate, which is not preferable.

In addition, the stability of the linear saturated polyester resin layer having a glass transition temperature of 40°C or higher becomes poor when the thickness of the layer becomes less than 3 μm, and the resin layer becomes hard when the thickness exceeds 60 μm. Since the container molding properties of the laminated sheet deteriorate, the thickness of the resin layer is preferably within the range of 3 to 60 μm.

The polyolefin resin layer constituting the surface layer of the laminated sheet for paper containers serves as the outer peripheral surface layer of the paper container obtained, and provides water resistance to the paper container from the outside, as well as the above-mentioned properties. It exhibits excellent thermal welding properties between the saturated polyester resin layer and the saturated polyester resin layer.

This polyolefin resin layer is made of, for example, low-density polyethylene, medium-density polyethylene, high-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, niy-lene-methyl acrylate copolymer,
It is made of ethylene-α/' olefin copolymer, polypropylene, etc. and has a thickness of about 3 to 150 μm.

Further, between the surface layer and the back layer in the laminated sheet for paper containers, an intermediate layer consisting of a paper composite base material layer formed by laminating, for example, one paper layer of aluminum foil, an olefin resin layer, a polyester stretched film layer, etc. In particular, by interposing a stretched resin film layer between the paper layer and the back layer, a low-crystalline linear saturated polyester resin layer with a glass transition temperature of 40°C or higher, it has excellent bending properties. This can be used as a laminated sheet for paper containers.

It is usually formed at the top of the container so as to close an opening for attaching a spouting tool formed at a predetermined position of the blank board made of the laminated sheet for paper containers having the laminated structure. As described above, the intervening member welded to the back layer of the blank plate in such a manner as to close the opening in which the blank board is located includes a front layer made of a linear saturated polyester resin layer and a back layer made of a polyolefin resin layer. The intervening member is bonded to the peripheral edge of the opening by the welding ability between the back layer of the blank plate and the surface layer of the intervening member.

The surface layer of the intervening member is made of the same saturated polyester resin as the back layer of the laminated sheet for paper containers.
Furthermore, the back layer is preferably made of the same polyolefin resin as the raw material for molding the pouring tool, but it is not necessarily limited to this.

The laminated sheet serving as the intervening member has a thickness of about 5 to 150μ, and the surface layer of the sheet has a thickness of about 3 to 60μ.
Further, the back layer is formed to have a thickness of about 2 to 90 μm, and the intervening member may have a two-layer structure of the front layer and the back layer, or For example, a biaxially stretched polyethylene terephthalate film, 2
A multilayer structure of three or more layers having a core layer made of an axially stretched nylon film, a biaxially stretched polypropylene film, an aluminum foil, a combination of two or more of these, and a core layer made of an adhesive polyolefin resin layer, etc. It may be something that has already been done.

By the way, to form the adhesive polyolefin resin layer, for example, poly-α-olefins such as polyethylene, ethylene-α-olefin copolymer, polypropylene, polybutene, polyisobutylene, and polydiolefins such as polybutadiene, polyisoprene, or A polyethylene polymer made of these copolymers, etc., and a carboxylic acid, a carboxylic acid salt, a carboxylic acid anhydride,
Carboxylic acid ester, carboxylic acid amide or imide,
Ethylenically unsaturated with a carbonyl (::) group based on aldehyde, ketone, etc., alone or in combination with a cyano (-C=N) group: hydroxy group: ether group, nioxirane (-C\-70) ring, etc. One or more monomers, specifically: A, -tyrenically unsaturated carboxylic acid, niarylic acid, methacrylic acid, maleic acid, fumaric acid, crotonic acid, itaconic acid, citraconic acid, 5-norbornene- 2,3-dicarboxylic acid, etc. B, Ethylenically unsaturated carboxylic anhydride: maleic anhydride, citraconic anhydride, 5-norbornene-2,3-dicarboxylic anhydride, tetrahydrophthalic anhydride, etc. C1 Ethylenically unsaturated ester: Acrylic Ethyl acid, methyl methacrylate, acrylic acid 2
- ethylhexyl, mono- or diethyl maleate, vinyl acetate, vinyl propionate, γ-propyl hydroxymethacrylate, β-human tetraxyacrylate, glycidyl acrylate, glycidyl methacrylate, β
-N-dithylaminoethyl acrylate, etc., ethylenically unsaturated amides or imides: acrylamide, methacrylamide, maleimide, etc.E, ethylenically unsaturated aldehydes or ketones: acrolein, methacrolein, vinyl methyl ketone,
It is a copolymer with an ethylenically unsaturated monomer such as vinyl butyl ketone, and among them, a copolymer with an ethylenically unsaturated carboxylic acid or an ethylenically unsaturated carboxylic anhydride is particularly preferably used.

In the laminated sheet for a paper container used in the method for attaching a pouring tool according to the invention of wooden tablet 2, an ethylene-vinyl alcohol copolymer resin that becomes the back layer of the laminated sheet, that is, the inner peripheral surface layer of the resulting paper container. If the ethylene content is less than 40 mol%, it is not practical because the temperature required for heat sealing is high, and if the ethylene content is less than 6 mol%,
If it exceeds 0 mol%, the tendency of adsorption of younger components in the inner filler increases, so the ethylene content is 40 to 60%.
It is preferred to utilize a mole percent ethylene-vinyl alcohol copolymer resin.

Regarding the resin layer made of the ethylene-vinyl alcohol copolymer, if the thickness of this layer is less than 5μ, the stability of the resin layer will decrease, and if it exceeds 40μ, the impact resistance will decrease. Therefore, the resin layer has a thickness of 5 to 40 μm.
It is preferable that it be within the range of .

The surface layer and intermediate layer in the laminated sheet for paper containers are:
The same structure as the surface layer and intermediate layer of the laminated sheet for paper containers used in the invention method of the wooden tablet 1 described above is utilized.

In addition, the intervening member used in the invention method of wooden tablet 2 is:
As mentioned above, it is made of a laminated sheet that has a surface layer made of an ethylene-vinyl alcohol copolymer resin layer and a back layer made of a polyolefin resin layer, and the surface layer is the inner surface layer of the paper container. It is preferable that the back layer is made of the same ethylene-vinyl alcohol copolymer resin as the molding material of the dispensing tool, but it is not necessarily limited to that. It's not something you can do.

The laminated sheet serving as the intervening member has a thickness of 7 to 150 mm.
μ, and the surface layer of the laminated sheet is about 5 to 5 μm.
The thickness of the back layer is approximately 60μ, and the back layer is formed to have a thickness of approximately 2 to 90μ. For example, a biaxially oriented polyethylene terephthalate film, a 2' axially oriented nylon film, a biaxially oriented polypropylene film, a/l/minilam foil, a composite layer formed by a combination of two or more of these, and an adhesive polyolefin. It may have a multilayer structure of three or more layers including a core layer made of a resin layer, etc. The member has a shape similar to the outline of an opening formed in a blank board for paper containers, and has an extension part of about 3 to 30 mm with respect to the outline of the opening. The shape is such that an easy break line is formed in a portion corresponding to the outline of the opening, and the flange portion of a separately manufactured pouring tool is formed in the extending portion of the intervening member. It is welded and fixed.

Therefore, in each of the invented methods of Mizui 1 and 2, the pouring tool attached to the opening of the blank board for paper containers has seven flange parts, and the pipe is formed by the blank board for paper containers. It is inserted from the inner circumferential layer side of the shaped body and welded to the flange portion of the back layer of the intervening member.

Note that the pouring tool having the flange portion is made of an integrally molded body made of polyolefin resin, such as low-density polyethylene.

Medium density polyethylene, high density polyethylene, ethylene
Vinyl acetate copolymer, ethylene-acrylic acid copolymer,
・Ethylene-methyl acrylate copolymer, ethylene-α
- Resin moldings made of olefin copolymers, polypropylene, etc. are used.

〔Example〕

Hereinafter, a specific configuration of a method for attaching a pouring tool when molding a paper container of the present invention will be described based on Examples.

Example 1 In Fig. 2 of the laminated sheet for paper containers, acid-resistant paper with a basis weight of 340 g/d/thickness 15
Intermediate layer made of a paper composite base material with a four-layer structure: μ fluoronomer resin “Himilan 1652: manufactured by Mitsui Depont Polychemical ■” layer / 9 μ thick aluminum foil / 12 μ thick biaxially stretched polyethylene terephthalate film layer 2
1, on the acid-resistant paper surface of the intermediate layer 21 made of the composite base material, a surface layer 22 of 30 μm thick polyolefin-based IH resin R Mirason 16p: manufactured by Mitsui Petrochemical Industries, Ltd. A linear saturated polyester resin "manufactured by Eastman Kodak Company:
PET G 6763. Glass transition temperature: 81℃" layer/
By laminating a back layer 23 made of a three-layer co-extruded film consisting of a linear saturated polyester resin with a thickness of 30 μm and a layer of linear saturated polyester resin “manufactured by Toyobo ■: Pylon GM-99OJ” and a layer of linear saturated polyester resin rPET G 6763J with a thickness of 15 μm. An example of a laminated sheet for paper containers used in the invention of Suiden 1, denoted by the reference numeral 20, was obtained.

1 beard 1 kl In Figure 3, 10μ thick linear saturated polyester resin rPET G 6763J layer/20μ thick linear saturated polyester resin “Vylon GM-99OJ layer/thickness 10
A surface layer a consisting of a three-layer co-pressed film consisting of a linear saturated polyester resin rPETG6763J layer of μ and a core layer c made of a biaxially stretched polyethylene terephthalate film having a thickness of 12 μ are laminated by a dry lamination method, and then the A laminate sheet for an intervening member was obtained by extrusion coating a back layer of polyolefin resin (Miroson 16 pJ) with a thickness of 20μ on the C side of the core layer. By simultaneously performing the punching process and the process of forming concentric break lines d having a diameter of 24 gm on the laminated sheet, the intervening member used in the invention of Suiku 1, denoted by the symbol e, can be obtained. A first example product was obtained.

In FIG. 3, a bottomed cylindrical body constituted by a peripheral wall portion A, a bottom wall portion B, and a flange portion C extending outward from the bottom wall portion B. A dispensing tool F consisting of an integrally molded body and a removable cap E that closes the opening tip of the bottomed cylindrical body made of the integrally molded body is made of polyolefin resin "Sumikasen G701: Sumitomo Chemical Co., Ltd." ”
Each injection molded article was molded by

The bottomed cylindrical body has a thin annular groove G for easy breakage along the periphery of the bottom wall B, and
A bull ring H, which is integral with the bottom wall part, is formed in a part surrounded by the thin annular groove G in the bottom wall part B, and the bull ring H is stretched. As a result, the bottom wall portion B is broken and removed along the thin annular groove G, and a flow path in the pouring device is formed.

In FIG. 5, there is a step of punching out the laminated sheet 20 into a substantially rectangular shape of 300** x 300 mm using the laminated sheet 20 for paper containers described above; At the same time, a punching process is performed to form an opening 24 with a diameter of 24 mm for inserting a pouring tool into the top portion of the paper container formed by the paper container blank plate 25 punched out. After obtaining a blank board for a paper container having an opening 24 for inserting the paper container, the intervening member e is attached to the back layer 23 of the blank board along the easy break line d in the intervening member e. The contour edge of the opening 24 was brought into contact with the contour edge, and heated at 220° C. and 2.0 kg/
cyi, by pressing under hot pressure conditions for 1 second, the intervening member e is attached to the back layer 23 of the blank plate,
The blank plate 25 was welded and fixed at a portion along the opening 24.

Next, by tearing the interposed member e from the surface layer a side of the interposed member e in the blank plate 25, that is, from the surface layer 22 side of the blank plate, the interposed member e is broken at the easy break line d of the interposed member e. The surrounded portion was separated and removed to obtain a blank board in which the intervening member e was laminated only in the portion along the peripheral edge of the opening 24 in the blank board.

Thereafter, a pair of opposing side portions of the blank board are overlapped and a body bonding part is formed by heat pressure, so that the inner circumferential surface becomes the back layer 23 of the blank board.
That is, a prismatic cylindrical body formed of a linear saturated polyester resin layer was obtained.

Further, the bottomed cylindrical body of the pouring tool F was inserted from the inner peripheral surface side of the square cylindrical body, and the amplitude was 1.5 KW.
The flange portion C of the bottomed cylindrical body was fixed to the back layer of the intervening member e under ultrasonic sealing conditions of a pressure of 4.0 kg1 crl and 0.8 seconds, and was designated by reference numeral 1 in FIG. A rectangular cylinder for a paper container to which the shown pouring tool F was attached was obtained.

Comparative Example 1 A blank plate made of a laminated sheet for paper containers having the same laminated structure as the laminated sheet for paper containers used in Example 1 was used in Example 1 without applying an intervening member. By fixing a spouting tool having the same configuration as that of Example 1 under the same welding conditions as those of Example 1, a rectangular tube body equipped with a spouting tool for comparison was obtained.

Example 2 Laminated sheet for paper containers: Acid-resistant paper with a basis weight of 3409/rrl/Ionomer resin "Himilan 1652: manufactured by Mitsui Typon Polychemical" layer with a thickness of 15μ/Aluminum foil with a thickness of 9μ/
For an intermediate layer made of a paper composite base material having a four-layer structure of a biaxially stretched polyethylene terephthalate film layer having a thickness of 12μ, an acid-resistant paper surface of the intermediate layer made of the composite base material has a thickness of 3 μm.
A surface layer 22 is formed by a layer of 0μ polyolefin resin “Miralan 16p: manufactured by Mitsui Petrochemical Industries, Ltd.”, and
On the biaxially stretched polyethylene terephthalate film layer surface of the paper composite base material, an ethylene-vinyl alcohol copolymer resin "ethylene content 47 mol%, Nipar G: ■Kuraray L!t" obtained by the inflation method was applied. (1
0 μ)/adhesive polyolefin resin “Tubatic AP”
220L 2 Mitsubishi Kasei■ layer (10μ)/ethylene-α
- A three-layer co-extruded laminated resin film of olefin resin "Urtzex 2020L: Mitsui Petrochemical Industries" layer (40μ) is made of ethylene-α in the laminated resin film.
- By laminating the olefin resin layer and the biaxially oriented polyethylene terephthalate film layer so that they were in contact with each other, an example product of a laminated sheet for paper containers used in the invention of Mizui 2 was obtained.

111 ratio 1 layer ethylene-vinyl alcohol copolymer resin "ethylene content 47 mol%, EVAL G: ■ Kuraray" layer (10μ
)/Adhesive polyolefin resin “Tubatic AP 2”
20 L: Mitsubishi Kasei ■” layer (lOμ)/ethylene-α
After obtaining a laminated sheet for an intervening member consisting of a three-layer co-extruded laminated resin film of φ olefin resin "Urtzex 2020L: Mitsui Petrochemical Industries" layer (40μ), the laminated sheet was shaped into a circle with a diameter of 35 mm. By simultaneously performing the step of punching into a plate shape and the step of forming concentric easy-break lines with a diameter of 24 mm on the laminated sheet, an example of the intervening member used in the invention of Sui-Tei 2 was obtained. I got it.

A dispensing tool identical to that used in Example 1 was prepared.

Re-living process for pouring tool Using the aforementioned laminated sheet for paper containers, the intervening member, and the pouring tool, the back layer of the blank board is removed by the same procedure as that described in Example 1. and the ethylene-vinyl alcohol copolymer resin layer of the intervening member at 240°C, 2.0 kg/cti,
The welding was carried out under heat and pressure conditions for 1.0 seconds, and the welding between the ethylene-α/olefin resin layer, which is the back layer of the intervening member, and the flange portion of the pouring tool was performed at an amplitude of 1.5 KW.

By performing ultrasonic sealing under the conditions of a pressure of 4.0 kg/ca and a duration of 0.8 seconds, a rectangular cylinder for a paper container to which a spouting tool F was attached was obtained.

Comparative Example 2 A blank plate made of a laminated sheet for paper containers having the same laminated structure as the laminated sheet for paper containers used in Example 2 was used in Example 2 without applying an intervening member. By fixing a spouting tool having the same configuration as that of Example 2 under the same welding conditions as those of Example 2, a rectangular tube body equipped with a spouting tool for comparison was obtained.

〔observation〕

As a result of observing the state of the bond between the spouting tool and the paper container blank board in the rectangular tubes equipped with the spouting tools obtained in each of the Examples and Comparative Examples, it was found that the rectangular tubes of Examples 1 and 2 In contrast, in Comparative Examples 1 and 2, the pouring tool and the rectangular cylinder for paper containers were bonded to the blank board for paper containers with sufficient adhesive force required for paper containers. The adhesive between the back layer and the back layer peeled off easily.

[Action and effect of the invention]

The method of attaching a pouring tool when molding a paper container according to the invention of Mizui 1 consists of a surface layer made of polyolefin resin, an intermediate layer including a gas barrier layer and a paper layer in a laminated structure, and a glass transition temperature A surface layer made of a linear saturated polyester resin and a polyolefin-based paper container are formed in an opening formed in a paper container blank plate made of a paper container laminated sheet having a back layer made of a linear saturated polyester resin at a temperature of 40°C or higher. An intervening member is made of a laminated sheet having a back layer made of resin, and has an easy-to-break line formed at a position corresponding to the outline of the opening in the blank plate, and the surface layer of the intervening member and the paper The back layer of the container laminated sheet is brought into contact with the back layer, and the space between the back layer of the blank plate and the surface layer of the intervening member is placed along the periphery of the opening in the blank plate. A step of adhering and fixing the intervening member to the back layer of the blank plate by welding ability, and using an easy-to-break line in the intervening member fixed to the blank plate to form a part surrounded by the easy-to-break line. a step of removing the intervening member in a portion where the intervening member is laminated to obtain a blank board in which the intervening member is laminated only in a portion along the periphery of the opening in the blank board; and a step in which the intervening member is fixed. A step of forming a container body using the blank plate to obtain a cylindrical body whose inner peripheral surface layer is constituted by the back layer of the laminated sheet for paper containers, and forming a flange portion from inside the cylindrical body. Insert a polyolefin resin pouring tool comprising: into the opening;
The method includes a step of welding and fixing the flange portion of the pouring tool to the intervening member of the cylindrical body.

In addition, the method of attaching the pouring tool when molding the paper container of the invention of Mizui 2 is based on the surface layer made of polyolefin resin,
Formed into a blank board for paper containers, comprising a laminated sheet for paper containers comprising an intermediate layer including a gas barrier outer layer and a paper layer in a laminated structure, and a back layer made of an ethylene-vinyl alcohol copolymer resin. The blank board is made of a laminated sheet having a surface layer made of an ethylene-vinyl alcohol copolymer resin and a back layer made of a polyolefin resin, and is easily broken at a position corresponding to the outline of the opening in the blank board. The intervening member on which the line is formed is brought into contact with the surface layer of the intervening member and the back layer of the laminated sheet for paper containers, and along the periphery of the opening in the blank board. a step of adhering and fixing the intervening member to the back layer of the blank board by welding ability between the back layer of the blank board and the surface layer of the intervening member; By using the easy-to-break line of the intervening member to remove the part of the intervening member surrounded by the easy-to-break line, the intervening member is applied only to the part along the periphery of the opening in the blank plate. The step of obtaining a blank plate on which the packaging member is laminated, and forming the container body by the blank plate to which the intervening member is fixed, allows the inner circumferential surface layer to be formed in the paper container laminated sheet. A step of obtaining a cylindrical body composed of a back layer, and from the inside of the cylindrical body,
The method comprises the steps of inserting a polyolefin resin pouring tool having a flange portion into the opening, and welding and fixing the flange portion of the pouring tool to the intervening member of the cylindrical body.

Accordingly, in the method for attaching a pouring tool for forming a paper container according to each of the present inventions, the cylindrical body obtained by the method of the present invention is used, and the inner circumferential surface layer thereof has a glass transition temperature. Since a paper container can be obtained which is composed of two linear saturated polyester resin layers or ethylene vinyl alcohol copolymer resin layers with a temperature of 40°C or less, the inner peripheral surface layer of the paper container is There is no permeation or adsorption of flavor components contained in the inner filler, and there is no elution of low molecular weight components from the resin layer forming the inner peripheral surface layer of the container into the inner filler.
without losing the deliciousness of the filling inside the paper container.
In other words, a paper container having long-term quality retention characteristics can be formed without degrading the quality of the filling material.

In addition, in the method of the actual invention, an intervening member that is suitable for welding to both the blank plate and a polyolefin resin pouring tool is adhered to the blank plate to which the pouring tool is attached along the periphery of the opening. Since the spouting tool made of polyolefin resin is fixed to the intervening member, the spouting tool can be stably attached.

Furthermore, in each of the methods of the present invention, an intervening member on which an easily broken line is formed is bonded to a blank board for a paper container.
In other words, since the intervening member is bonded without having a portion corresponding to the opening previously punched out, there is no possibility that the intervening member may be distorted during the handling process when adhering the intervening member. Since there are no holes, the intervening member can be fixed to the blank plate in an orderly manner.

[Brief Description of the Drawings] Fig. 1 is a sectional view of a main part model of a rectangular cylinder obtained by the method of attaching a pouring tool when molding a paper container according to the first invention, and Fig. FIG. 3 is a cross-sectional view of a model of an example of a paper container laminated sheet used in the method for attaching a pouring tool when forming a paper container according to the first invention. A cross-sectional view of a model of an example of an intervening member used in a method for attaching a pouring tool during molding, and FIG. 4 is a cross-sectional view of a model of an example of a pouring tool used in the method of the present invention. , FIG. 5 is a cross-sectional view of a model showing a state in which an intervening member is fixed to a blank plate for a paper container. DESCRIPTION OF SYMBOLS 1: Rectangular cylinder to which pouring tool F is attached, 20: Laminated sheet for paper containers, 21: Intermediate layer in the laminated sheet for paper containers, 22: Surface layer in the laminated sheet for paper containers, 23
: Back layer in the laminated sheet for paper containers, 24: Opening in the blank board 25 for paper containers obtained by 20 (24) Laminated sheet for paper containers, d: Easy break line formed in the intervening member e, e : interposed member, a: surface layer of the interposed member, b: back layer of the interposed member, F: spouting tool, C: 7 launch portions of the spouting tool F. Patent applicant: Dai Nippon Printing Co., Ltd. Representative: Osamu Ichikawa, Ichi Yoshiarai
Kiyoko Figure 1 Figure 3 Figure 4 Figure 2 Figure 5 Procedure Nebo Seisho (self-motivated) July 14, 1999 Commissioner of the Japan Patent Office Kiyoshi 1) Moon Yi 1 Indication of the case 1988 Special Permit Application No. 204241 2 Name of the invention Method for attaching a pouring tool when forming a paper container 3 Relationship to the case of the person making the amendment Patent applicant (289) Dai Nippon Printing Co., Ltd. 4 Agent Address: 152 Meguro-ku, Tokyo Nakane 1-chome 7-22-1101, the contents of the amendment in the column "Detailed Description of the Invention" in the specification, from page 16, line 14 to page 17, line 14, "Constituting the back layer. ...Undesirable" should be corrected as follows. The linear saturated polyester resin having a glass transition temperature of 40° C. or higher constituting the back layer is, for example, a polyester resin such as ethylene glycol, propylene glycol, 1,4-butanediol, 1,4-cyclohexane dimetatool, etc. A cocondensation polymer of a monofluoric acid component and a dicarboxylic acid component such as aliphatic dicarboxylic acids such as adipic acid and sebacic acid, and aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, and diphenyldicarboxylic acid, specifically, It can be formed using a co-condensation polymer of ethylene glycol and terephthalic acid, ethylene glycol, isophthalic acid and terephthalic acid, or 1,4-cyclohexane dimetatool and ethylene glycosylation. Note that the aliphatic dicarboxylic acid in the acid component Ingredients are 10% by weight
In the case of a cocondensation polymer having the above properties, a saturated polyester resin layer made of the cocondensation polymer is not preferable because its fragrance retention performance tends to decrease.

Claims (1)

[Claims] 1. A surface layer made of a polyolefin resin, an intermediate layer containing a gas barrier layer and a paper layer in a laminated structure, and a back layer made of a linear saturated polyester resin with a glass transition temperature of 40° C. or higher. A laminated sheet comprising a laminated sheet for a paper container comprising a surface layer made of a linear saturated polyester resin and a back layer made of a polyolefin resin in an opening formed in a blank board for a paper container. , an intervening member having an easy-to-break line formed at a position corresponding to the outline of the opening in the blank plate is arranged so that the surface layer of the intervening member is in contact with the back layer of the laminated sheet for paper containers; and the welding ability between the back layer of the blank plate and the surface layer of the intervening member at a portion along the periphery of the opening in the blank plate,
The step of adhering and fixing the intervening member to the back layer of the blank board, and the step of bonding and fixing the intervening member to the back layer of the blank board, and the step of bonding the intervening member fixed to the blank board by using the easy-to-break line, a step of obtaining a blank plate in which the intervening member is laminated only in a portion along the peripheral edge of the opening in the blank plate by removing the blank plate; a step of obtaining a cylindrical body whose inner peripheral surface layer is constituted by the back layer of the laminated sheet for paper containers by forming a flange portion; A pouring tool for molding a paper container, comprising the steps of: inserting a pouring tool made from a manufactured product into the opening, and welding and fixing a flange portion of the pouring tool to an intervening member of the cylindrical body. How to install. 2. From a paper container laminated sheet comprising a surface layer made of polyolefin resin, an intermediate layer containing a gas barrier layer and a paper layer in the laminated structure, and a back layer made of ethylene-vinyl alcohol copolymer resin. The opening in the blank board for a paper container is made of a laminated sheet having a surface layer made of an ethylene-vinyl alcohol copolymer resin and a back layer made of a polyolefin resin. An intervening member having an easy-to-break line formed at a position corresponding to the contour line of the portion is brought into contact with the surface layer of the intervening member and the back layer of the paper container laminated sheet, and bonding the intervening member to the back layer of the blank board by welding ability between the back layer of the blank board and the surface layer of the intervening member at a portion along the periphery of the opening in the blank board; By fixing the intervening member fixed to the blank plate and removing the portion surrounded by the easy break line using the easy break line, the peripheral edge of the opening in the blank plate is removed. The process of obtaining a blank plate in which the intervening member is laminated only along the along the line, and forming the container body from the blank plate to which the intervening member is fixed, allows the inner circumferential surface layer to be laminated with the paper. A step of obtaining a cylindrical body composed of a back layer of a laminated sheet for containers, and inserting a polyolefin resin pouring tool having a flange portion into the opening from inside the cylindrical body, A method for attaching a pouring tool when molding a paper container, comprising the step of welding and fixing a flange portion of the pouring tool to an intervening member of the cylindrical body.