JP2010023400A - Laminate for ron dell molding, its manufacturing method, rondelle molding, and tube container using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminate for a rondelle molding which has good followability to deep draw molding, is prevented from generating delamination and a pinhole, and is excellent in moldability, to produce the rondelle molding which is excellent in gas-barrier properties and openability during the sticking opening of a sealed spout, and to provide a tube container using it. <P>SOLUTION: The laminate for the rondelle molding is composed of a shoulder part in the shape of a truncated cone, a cylindrical head part connected to the shoulder part, and a sealed spout which can be broken by a protuberance. The laminate is composed of at least an unstretched thermoplastic resin layer, a metal foil protective layer, a metal foil layer, and an adhesive resin layer, and a thermoplastic resin layer which are arranged in turn from the outside. The rondelle molding is produced by deep draw-molding the laminate. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an upper member (Rondel molded body) that is used by being integrally molded with a shoulder portion and a mouth-neck portion of a tube container. In particular, the body of the tube container is formed of a laminate having an excellent gas barrier property, and the shoulder, the neck and the neck, and the spout provided integrally with one end of the body are also provided on the inner surface of the shoulder. A tube container with improved gas barrier properties of the entire container can be obtained by arranging and molding a high gas barrier Rondel molded body that has been molded in advance according to the shape of the inner surface of the head, mouth and neck, and spout Is.

Conventionally, tube containers are used for toothpaste, kneaded wasabi, kneaded, filled with foods such as condensed milk, cosmetics, pharmaceuticals, etc. As an easy-to-use container, its use and use amount have been expanded.
Such tube containers are diversified with the expansion of applications, and in order to improve the storage stability of the contents, it is required to improve the gas barrier property of the tube container. In the tube container, the body part is formed of a laminated sheet obtained by laminating a metal foil gas barrier material such as aluminum foil, and the shoulder part of the shoulder part and the mouth-neck part formed by integral molding at one end of the body part A donut-shaped member called a Rondel molded body, in which a composite sheet obtained by laminating a heat-adhesive resin such as polyethylene on both sides of a metal foil is punched in a circle, and a hole corresponding to the mouth and neck is provided in the center A tube container made by molding and inserting a cocoon into a cap shape and integrally forming it was used (Patent Document 1).

However, even in the tube container as described above, although the thickness of the molded resin is thick at the mouth and neck, no measures for improving the gas barrier property are taken, and it is not completely airtight. In addition, the contents filled in the tube container are often low in fluidity such as pastes, so in the case of contents that are easily affected by oxygen, the contents filled in the mouth and neck during storage Discolored or changed in quality, and this is pushed out at the start of use. Therefore, it has been desired to further improve the gas barrier property for the mouth and neck.
In order to meet such a demand, the gas barrier property improving member such as the Rondel molded body is not limited to the shoulder portion of the tube container, but also from the frustoconical shoulder portion to the cylindrical mouth and neck portion that is continuous therewith. There has been proposed a tube container in which the molded member is molded into an extended shape, and the molded member is integrally molded on the shoulder portion and the mouth and neck portion of the tube container (Patent Document 2).
JP-A-5-116245 JP 2006-224467 A

  The Rondel molded body composed of the above-mentioned frustoconical shoulder and a cylindrical mouth and neck molded body continuous therewith is formed on the inner and outer peripheral surfaces of the shoulder portion of the tube container, and further inside the shoulder portion itself. Since it is applied as buried, it uses a molded body formed by cold forming such as compressed air or press forming to form a shape that fits the shoulder of the tube container, and subsequent punching forming Has been.

  A laminated sheet used in a conventional Rondel molded body has a metal foil layer at least between a surface resin layer and a sealant layer, and a laminated sheet in which polyolefin resin films are laminated on both the front and back surfaces of the metal foil layer. A Rondel molded body made of a molded body is used. In general, (1) a method in which an anchor coat layer is provided as an adhesive layer on the metal foil layer surface, and a polyolefin resin is laminated by extrusion lamination on both the front and back surfaces, or (2) two adhesive layers are provided on the metal foil layer surface. Using a dry lamination adhesive such as a liquid curable polyurethane adhesive, a method of laminating a surface resin layer and a sealant layer forming film that have been formed into a film in advance by laminating by a dry lamination method is employed. .

  First, in the extrusion laminating method of (1), the anchor coat layer is formed by a composition for forming an anchor coat agent such as an organic titanium-based, isocyanate-based, polyethyleneimine-based, or polybutadiene-based agent. When components with high permeability such as alcohol components and essential oil components are included, the anchor coat layer has insufficient resistance, and when it is stored for a long period of time, the sealant layer may delaminate from the metal foil layer. There is. For this reason, when piercing and opening the sealed spout provided on the cylindrical mouth and neck, delamination between the sealant layer and the metal foil layer occurs, and the interlayer strength decreases while in contact with the contents There was a problem in the piercing and unsealing properties, such as the unsealing performance of the sealing spout being lowered or the unsuccessful unsealing.

Similarly, when a sealant layer is bonded to the metal foil layer of (2) by the dry lamination method, the contents containing a highly permeable substance such as a fragrance, mineral oil, or an organic polar solvent are enclosed in the tube container. Then, since the highly permeable substance reaches the adhesive layer surface for dry lamination in the Rondel molded body laminated on the shoulder of the tube container, the interface between the sealant layer and the metal foil layer of the Rondel molded body is reached. The highly permeable substance stays, the resistance of the adhesive for dry laminating is insufficient, and after a long period of storage, the interlaminar strength of the portion decreases and the delamination phenomenon occurs. When producing a Rondel molded body by deep-drawing a laminated sheet having the above-described structure, the laminated sheet adhered with an adhesive has poor followability to deep-drawing processing due to insufficient strength between layers, The moldability is inferior, for example, peeling occurs, distortion is formed in the molded body, and pinholes are generated. For this reason, the original function of the Rondel molded body is impaired, and the storage performance of the contents in the tube container is lowered. Also in this case, when the sealed spout provided in the cylindrical mouth and neck was pierced and opened, there was a problem with the piercing and unsealing properties such as the unsealing performance of the sealed spout being lowered or poor opening. .
In addition, there are restrictions on the bonding method between the layers, especially the sealant layer on the content side of the metal foil layer, and thermosetting adhesives such as urethane adhesives and epoxy adhesives are bonded for dry lamination. When used as an agent, the uncondensed monomer still remaining after thermosetting may be transferred to the content through the sealant layer, which may cause alteration or discoloration.

The above problems can be solved by the following present invention.
That is, the invention described in claim 1 is composed of a frustoconical shoulder, a cylindrical head connected to the shoulder, and a sealed spout, and the sealed spout can be broken by a projection. A laminate for a certain Rondel molded body, wherein the laminate comprises at least an unstretched thermoplastic resin layer, a metal foil protective layer, a metal foil layer, an adhesive resin layer, and a thermoplastic resin layer from the outside. It consists of the laminated body for the characteristic Rondel molded object.

  The invention described in claim 2 is characterized in that in the laminate for a Rondel molded body according to claim 1, the metal foil protective layer is formed of at least two layers.

  According to a third aspect of the present invention, in the laminate for a Rondel molded body according to the first or second aspect, the thermoplastic resin layer is formed of low-density polyethylene.

  In the invention described in claim 4, a first laminate is formed by laminating a metal foil protective layer on one surface of an unstretched thermoplastic resin layer via an adhesive, and one of the thermoplastic resin layers is formed. After forming an adhesive resin layer on the surface and laminating a metal foil layer on the adhesive resin layer to form a second laminate, the second laminate is subjected to heat treatment and cooling treatment, The laminate for a Rondel molded body according to any one of claims 1 to 3, wherein the metal foil layer surface of the second laminate is bonded to the metal foil protective layer surface of the laminate of claim 2 via an adhesive. It consists of the manufacturing method of the laminated body for Rondel molded objects.

  The invention described in claim 5 is characterized in that, in the method for manufacturing a laminate for a Rondel molded body according to claim 4, the heat treatment is performed by contacting a heat roll with the metal foil layer surface.

  The invention described in claim 6 is characterized in that, in the method for manufacturing a laminate for a Rondel molded body described in claims 4 to 5, the cooling treatment is performed by contacting a cooling roll on the metal foil layer surface.

  The invention described in claim 7 is manufactured by deep drawing using the laminate for a Rondel molded body according to any one of claims 1 to 6, and has a frustoconical shoulder portion, and is connected to the shoulder portion. The Rondel molded body is composed of a cylindrical head and a sealed spout, and the sealed spout can be broken by a projection.

  In the invention described in claim 8, the cylindrical body is formed from a multilayer laminate having a gas barrier property, and the shoulder of the tube container and the continuous neck and neck are integrally formed in the upper opening of the body. The Rondel molded body according to claim 7 is integrally formed on the inner surface of the shoulder portion of the tube container and the mouth and neck that is continuous with the shoulder portion of the tube container.

  According to the present invention, it is possible to manufacture a laminate for a Rondel molded body that has excellent adhesion strength between layers and has good followability to deep drawing, and the Rondel molded body does not cause delamination or pinholes. Can be manufactured. When an extruded tube container is produced using this Rondel molded body, it is possible to prevent the unsealing property at the time of piercing and unsealing of the sealed spout and the occurrence of unsuccessful unsealing. In addition, the presence of the metal foil layer can completely block the outside air and contents until it is pierced by the protrusion, and the toothpaste, food, medicine, etc. containing aromatic components such as alcohol and essential oil as an extruded tube container Even if the container is stored, it is possible to prevent deterioration of the storage performance of the contents in the tube container, such as alteration or discoloration of the contents, and a tube container having excellent contents storage stability can be obtained.

Hereinafter, a laminate for a Rondel molded body according to the present invention, a method for producing a laminate for a Rondel molded body according to the present invention, and a method for molding a Rondel molded body using the same will be described in detail with reference to the drawings.
FIG. 1 shows a configuration of a laminate 1 for a Rondel molded body according to the present invention. In order from the side which becomes the outer side of the container when the tube container is finally produced, it is composed of unstretched thermoplastic resin layer 2 / metal foil protective layer 3 / metal foil layer 4 / adhesive resin layer 5 / thermoplastic resin layer 6. The
FIG. 2 is a diagram for explaining the steps of a method for producing a Rondel molded body 18 using the laminate 1 for Rondel molded bodies of the present invention, and shows the shape of the Rondel molded body for each process in a front view. is there. However, the step of trimming the outer periphery of the fifth molded body in the step (7) is omitted.
FIG. 3 is a cross-sectional view of a main part showing the configuration of an embodiment in which a Rondel molded body 18 produced using the laminate 1 for Rondel molded body of the present invention is used for a tube container 19. In addition, this invention is not limited to these drawings, unless the summary is exceeded.

  As the unstretched thermoplastic resin layer 2, when the tube container shoulder portion and the mouth-and-neck portion 22 continuous therewith are integrally molded, the outer molding resin 23 and the Rondel molded body 18 may be strongly heat-welded. Resin that can be used, for example, low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polyolefin resin such as polypropylene (homopolypropylene, block polypropylene, random polypropylene, etc.), or olefin and vinyl A polyolefin resin such as a monomer, an acrylic monomer, a copolymer with a copolymerizable monomer such as an unsaturated carboxylic acid, or a blend composition thereof is mainly used. The unstretched thermoplastic resin layer has a thickness of about 30 μm to 200 μm, preferably about 40 μm to 150 μm.

  When the above-mentioned unstretched thermoplastic resin layer 2 is used for the outermost layer of the laminate 1 for the Rondel molded body, the Rondel molded body 18 is produced by deep drawing and integrally molded with the tube container 19. The adhesion between the outer molded resin 23 and the Rondel molded body 18 forming the shoulder portion and the continuous neck portion 22 is improved, and does not peel even after the contents are filled and stored.

  As the metal foil protective layer 3, it is preferable to use a film having a high film elongation rate so that the followability to the deep drawing process is good. For example, nylon, amorphous polyethylene terephthalate sheet or the like is used. The metal foil protective layer 3 may be composed of one layer using the film, or may be composed of at least two or more layers using one or more kinds of films. The thickness of the metal foil protective layer 3 is preferably 10 μm to 50 μm, and if it is 10 μm or less, the metal foil layer is easily torn during the deep drawing forming process, it is difficult to form, and if it is 50 μm or more, the elongation of the laminate deteriorates. In addition to being difficult to mold, the piercing and unsealing performance of the sealed spout deteriorates.

  By protecting the surface of the metal foil layer using a film having a high film elongation rate for the metal foil protective layer 3, the followability to the deep drawing process is improved, and the occurrence of delamination and pinholes can be prevented. When the metal foil protective layer is at least two layers, the metal foil layer has higher protection than the single layer, which further improves the formability during deep drawing, It can be prevented that pinholes are generated and the barrier property is lowered.

  As the metal foil layer 4, a metal foil such as an aluminum foil can be used. The thickness of the metal foil layer 4 is preferably 30 μm to 100 μm. When the thickness is 30 μm or less, pinholes are generated during deep drawing, and when the thickness is 100 μm or more, the metal foil layer becomes too strong. The elongation of the resin is poor, tearing and pinholes occur, and the molding processability deteriorates.

  By providing the metal foil layer 4 having gas barrier properties to the laminate 1 for the Rondel molded body, a barrier action against gas and moisture can be provided.

  For the adhesive resin layer 5, for example, an adhesive resin such as ethylene methacrylic acid, ethylene methacrylic acid copolymer, ethylene acrylic acid copolymer, ionomer, acid-modified polypropylene can be used. For example, Mitsui Dupont Polychemical Co., Ltd. Nucleel Are commercially available.

  The thickness of the adhesive resin layer 5 is preferably 20 to 50 μm, and delamination does not occur, and the adhesiveness with the metal foil layer 4 is excellent and the adhesiveness with the thermoplastic resin layer is also excellent. Further, even if toothpaste, food, medicine, etc. containing aromatic components such as alcohol and essential oil are housed as an extruded tube container, the adhesive resin layer 5 is excellent in resistance to these components. There is no delamination with the plastic resin layer 6, and the tube container can be made excellent in the storage stability of the contents.

The thermoplastic resin layer 6 includes, for example, linear low density polyethylene, low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene homopolymer, polypropylene copolymer, acrylonitrile polymer, polyester, ethylene / vinyl alcohol copolymer, ethylene・ Ethyl acrylate copolymer, ethylene / acrylic acid copolymer, ethylene / methacrylic acid copolymer, acid copolymer consisting of copolymer of unsaturated carboxylic acid and olefin, ethylene / vinyl acetate copolymer alone Resin or a mixed resin of two or more of these is used.
Among them, it is preferable to use low density polyethylene having high adhesiveness between the adhesive resin layer 5 and the thermoplastic resin layer 6, and a Rondel laminate having excellent piercing openability when opening the sealed spout 20 of the tube container 19. The body 1 can be produced. The thickness is about 30 μm to 100 μm, preferably about 40 μm to 60 μm.

  As a process for producing a laminate 1 for a Rondel molded body as shown in FIG. 1, first, an unstretched thermoplastic resin layer 2 is bonded to one surface of a metal foil protective layer 3 via an adhesive, and unstretched. A first laminate 7 composed of the thermoplastic resin layer 2 / metal foil protective layer 3 is formed. As a bonding method, a dry laminating method, a heat laminating method, a sandwich laminating method or the like may be laminated, or the metal foil protective layer 3 may be extruded and laminated on the unstretched thermoplastic resin layer 2. Examples of adhesives include modified polyolefin resins, two-component curable urethane adhesives, polyester urethane adhesives, polyether urethane adhesives, acrylic adhesives, polyester adhesives, polyamide adhesives, poly Vinyl acetate adhesives, epoxy adhesives, rubber adhesives, and the like can be used.

When the metal foil protective layer 3 is composed of two or more layers, the second layer or more is laminated on the unstretched thermoplastic resin layer 2 via an adhesive, and this is the first laminate. 7
Next, the adhesive resin is extruded onto the thermoplastic resin layer 6 by an extrusion lamination method, and the metal foil layer 4 is laminated to form the adhesive resin layer 5 and the metal foil layer 4, and the metal foil layer 4 / adhesion A second laminate 8 comprising the resin layer 5 / thermoplastic resin layer 6 is formed. The adhesive resin layer 5 and the thermoplastic resin layer 6 may be formed by a T-die coextrusion method.

  Next, the second laminate 8 is heat-treated and further cooled. Specifically, the heat treatment and the cooling treatment are performed by sending the second laminated body 8 to a heat roller so that the heat roll is in contact with the metal foil layer 4 side. Each layer is melted and the molten state is maintained for a certain period, and then sent to a cooling roll and rapidly cooled to solidify the entire molten layer.

The heat treatment is usually performed at 160 ° C. or more, preferably 180 ° C. to 220 ° C., but the molten state of the second laminate 8 is at least for a certain period, preferably 1 second to 3 seconds, until the cooling roll. It is preferable to hold for a while. If the molten state holding time is too short or does not reach the molten state, adhesion between the metal foil layer 4, the adhesive resin layer 5, and the thermoplastic resin layer 6 to be formed becomes insufficient. In the formed laminate 1 for the Rondel molded body or the Rondel molded body 18 formed by deep drawing, pinholes and delamination (delamination) may occur. In some cases, a heat oven, an infrared heater, or the like can be used as a heat treatment method.
By performing the heat treatment, the compatibility between the metal foil layer 4, the adhesive resin layer 5, and the thermoplastic resin layer 6 is improved, and the adhesive strength between the layers is improved.

Next, the second laminate 8 is rapidly cooled to form a strong welded layer between the layers. In this case, the cooling rate is 80 ° C./second or more and 1000 ° C./second or less, preferably 80 ° C./second or more and 500 ° C./second or less, and the temperature of the second laminate 8 is 70 ° C. to 0 ° C., preferably 40 ° C. to It is preferable to rapidly cool to 10 ° C.
By improving the interlaminar strength, when the Rondel molded body laminate 1 is deep-drawn to produce the Rondel molded body 18, it has excellent moldability without causing delamination, and the extraction opening of the tube container can be opened. Decline and poor opening can be prevented.

  In place of the adhesive resin layer, there is a method of providing an anchor coat layer as an adhesive layer on the surface of the metal foil layer. However, because the metal foil layer lacks waist and strength, first, one or two layers are used as the carrier material. It is necessary to laminate the above metal foil protective layer on one metal foil layer surface via an adhesive. Then, after forming an anchor coat layer on the other metal foil layer surface, and further laminating a thermoplastic resin layer thereon, laminating with a metal foil protective layer / metal foil layer / anchor coat layer / thermoplastic resin layer, The heat treatment and cooling treatment are performed. At that time, the heat roll and the cooling roll do not directly contact the metal foil, but the heat roll and the cooling roll are brought into contact with the surface of the metal foil protective layer to perform heat treatment and cooling treatment. However, through the metal foil protective layer, the thermal conductivity to the metal foil layer / anchor coat layer / thermoplastic resin layer is reduced, the effect of heat treatment and cooling treatment is reduced or unstable, It may be difficult to adjust the temperature setting or processing speed. On the other hand, in the method of providing an adhesive resin layer as in the present invention, after the adhesive resin layer 5 is formed on one surface of the thermoplastic resin layer 6 and the metal foil layer 4 is formed thereon, the above heat treatment and cooling are performed. In order to perform the treatment, the heat roll and the cooling roll can be in direct contact with the metal foil layer 4, the heat conductivity is good, and each of the metal foil layer 4, the adhesive resin layer 5, and the thermoplastic resin layer 6 is provided. The compatibility between the layers is improved, and the adhesive strength between the layers becomes strong. Regardless of whether the metal foil protective layer 3 is one layer or two or more layers, the heat treatment and the cooling treatment can be stably performed.

After the heat treatment and cooling treatment, the first laminate 7 is bonded onto the metal foil layer 4 of the second laminate 8 with an adhesive so that the metal foil protective layer 3 is in contact with the laminate. The body 1 is produced. As a bonding method, a dry lamination method, a heat lamination method, a sandwich lamination method, or the like may be laminated. Examples of adhesives include modified polyolefin resins, two-component curable urethane adhesives, polyester urethane adhesives, polyether urethane adhesives, acrylic adhesives, polyester adhesives, polyamide adhesives, poly Vinyl acetate adhesives, epoxy adhesives, rubber adhesives, and the like can be used.
In the laminate 1 for the Rondel molded body, no adhesive is used on the content side of the metal foil layer 4, and therefore, when the Rondel molded body 18 is produced by deep drawing the Rondel molded body laminate 1, bonding is performed. Due to insufficient adhesive strength of the agent, delamination and pinholes do not occur, and it is possible to prevent the storage performance of the contents in the tube container from deteriorating. In addition, after filling the contents into the tube container 19 using the Rondel molded body 18, the resistance of the adhesive at the interface between the thermoplastic resin layer 6 and the metal foil layer 4 of the Rondel molded body 18 due to the highly permeable substance of the contents. Therefore, it is possible to prevent a decrease in the opening strength of the extraction opening of the tube container 19 and a poor opening due to a decrease in interlayer strength after the storage for a long period of time or a delamination phenomenon. Further, it is possible to prevent the uncondensed monomer in the adhesive from being transferred to the contents and being altered or discolored.

A method of manufacturing the Rondel molded body 18 by deep drawing using the laminate 1 for Rondel molded body will be described.
In the manufacturing method of the Rondel molded body shown in FIG. 2, in step (1), a round and flat composite sheet 9 having a predetermined size is produced by punching from the laminate 1 for Rondel molded body manufactured above. Next, in the step (2), the circular composite sheet 9 is formed into a frustoconical shape having an inclined outer edge portion by press molding at room temperature using a first male and female molds, and at the same time a central portion. Is formed into a cylindrical shape having a head portion 11 and a top portion 12, and a first molded body 13 having the head portion 11 and the top portion 12 at the center of the shoulder portion 10 is produced. Compared with the 5th molded object 17 shown to the process (6), the 1st molded object 13 produced at this process is the thing in which the diameter of the head 11 is especially large and the height is also low.
In step (3), the area of the shoulder 10 is increased while reducing the diameter of the head 11 by pressing the first molded body 13 at room temperature using a second male and female mold. In step (4), the second molded body 14 is press-molded at room temperature using a third male and female mold, and the diameter of the head 11 is further formed. The third molded body 15 is produced by molding so as to increase the area of the shoulder portion 10 while reducing the size of the shoulder 10, and then in the step (5), the third molded body is brought close to the final shape of the Rondel molded body. The body 15 is formed by pressing at a normal temperature using a fourth male and female mold, and the head 11 is further reduced in diameter to a predetermined diameter, and at the same time, the length of the head 11 is increased to a predetermined value. Forming the length and further increasing the area of the shoulder 10 to form the fourth To produce a form 16.
In step (6), the fourth molded body 16 is subjected to press molding at room temperature using a fifth male and female mold, as shown in FIG. The sealed spout 20 is formed, and the shape of the peripheral edge of the shoulder 10 is increased at one end, and then formed into a final set shape having a substantially horizontal portion at the lower end thereof, thereby producing a fifth molded body 17. Is.
Furthermore, the step (7) includes a step of trimming the outer periphery of the fifth molded body 17 so as to have a predetermined outer peripheral dimension to obtain a final form of the Rondel molded body 18. Illustration is omitted to approximate the fifth molded body 17. By using a Rondel molded body 18 having a frustoconical shoulder portion 10, a cylindrical head portion 11 connected to the shoulder portion, and a sealed spout 20 for the tube container, The outside air and the contents can be completely blocked to achieve high air tightness, the gas barrier properties at the tube container shoulder and the continuous neck and neck improve, prevent discoloration and alteration of the contents due to the influence of oxygen, etc. A shaped head and a sealed spout can be formed.
At the time of opening, the contents can be poured out by destroying the sealed spout with a protrusion.

  In the above steps (1) to (7), due to the good followability of the metal foil protective layer against the deformation of the metal foil layer, the unstretched thermoplastic resin layer 2 / metal foil protective layer 3 / metal foil Generation of delamination between layers 4 and occurrence of pinholes can be prevented.

Next, FIG. 3 is a cross-sectional view of the main part showing the configuration of an embodiment in which the Rondel molded body 18 produced using the laminate 1 for Rondel molded body of the present invention is used for the tube container 19. It is the figure which abbreviate | omitted and showed the lower part of the part 21. FIG.
The tube container 19 shown in FIG. 3 has a cylindrical body portion 21 formed of a multi-layer laminate having gas barrier properties, and a tube container shoulder portion and a mouth-and-neck portion 22 continuous with the tube container shoulder portion at an upper opening portion of the body portion 21. Is integrally formed, the Rondel molded body 18 manufactured by the manufacturing method described in the steps (1) to (7) is inserted into the inner surface, and the sealing spout 20 is formed as shown in the figure. The outer molding resin 23 is formed by a compression molding method or an injection molding method so as to cover the outer surface and the surrounding end portions, and is integrally molded. A sealed spout 20 is formed at the center of the top portion that is not covered with the outer molding resin 23.

The multilayer laminate having a gas barrier property used for the body portion 21 is a simple structure as the multilayer laminate when the multilayer portion having a gas barrier property is thermally bonded in a cylindrical shape to produce the body portion 21. A laminate in which a printing layer such as a pattern and a gas barrier layer are laminated on the intermediate layer and a polyolefin resin layer is laminated on both sides thereof can be used.
There are no particular restrictions on the position at which the printed layer such as the candy or the pattern is provided as long as it is visible from the outside. When the multilayer laminate is thermally bonded in a cylindrical shape, the surface of the outer polyolefin resin layer, that is, the outermost layer. It can also be provided at a position. Even when the gas barrier layer is opaque, the intermediate layer is limited to the outer surface of the gas barrier layer, but when the gas barrier layer is transparent, it may be either the outer surface or the inner surface of the gas barrier layer.

When the example of the structure of the said multilayer laminated body is shown in an order from the outer side when it heat-bonds to a cylinder shape, the following structures are mentioned.
(A) Polyolefin-based resin layer / adhesive layer / biaxially stretched polyethylene terephthalate film (hereinafter referred to as PET film) / printing layer such as a pattern / adhesive layer / transparent or opaque gas barrier layer / adhesive layer / polyolefin-based resin layer (B) Polyolefin-based resin layer / adhesive layer / transparent gas barrier layer / printed layer such as pattern / adhesive layer / polyolefin-based resin layer (c) Printed layer such as pattern / polyolefin-based resin layer / adhesive layer / transparent or opaque Gas Barrier Layer / Adhesive Layer / Polyolefin Resin Layer In addition to this, it is also possible to produce the body of the tube container using the laminate 1 for Rondel molded body of the present invention.

The tube container 19 rolls up the laminate described above, superimposes the surface resin layer surface, which is the outermost layer at both ends of the laminate, and the sealant layer, which is the innermost layer, and welds the polymerization end portions thereof. The body part 21 which forms a welding part and forms a tube container is produced. Moreover, the surface of the trunk | drum 21 has printing layers, such as a character, a figure, a symbol, a design, by various printing methods.
The laminated body is not limited to the tube container structure shown in the figure, but can be applied to a self-solid body such as a three-way seal body or a standing pouch.

In addition, compression molding is used as an outer molding resin 23 that is integrally molded with the Rondel molded body 18 to form a shoulder portion of the tube container and a continuous neck portion 22 in the opening of the upper portion of the body portion 21 of the tube container 19. In addition to moldability of injection molding, it has heat-weldability with the polyolefin-based resin layers on both sides of the body portion 21 and the unstretched thermoplastic resin layer 2 of the Rondel molded body 18, and is continuous with the tube container shoulder. It is also necessary to be able to impart an appropriate hardness to the mouth-and-neck portion 22, and for this purpose, it is the same as the polyolefin resin used on both sides of the body portion 21 and the unstretched thermoplastic resin layer 2 used for the Rondel molded body 18. Resin can be used.
Since the heat of the resin melted by heating for compression molding or injection molding is used, the outer molding resin 23 has a melting temperature because it is thermally welded to the end edge of the barrel 21 and the Rondel molded body 18. It is preferable to use a high polyolefin-based resin, and it is more preferable to use medium density polyethylene or high density polyethylene in order to combine the above required performance.

Next, a cap for sealing the mouth and neck part 25 is attached, and after sealing the mouth and neck part 25, a predetermined amount of contents such as toothpaste, kneaded mustard, kneaded wasabi are filled from the opening part of the trunk part 21, and the opening part Is welded to form a bottom welded portion, and a tube container filled with the contents can be obtained.
The tube container 19 equipped with the Rondel molded body 18 obtained by molding the laminate 1 for the Rondel molded body of the present invention is particularly excellent in gas barrier properties such as water vapor and oxygen, and can completely block the outside air and the contents. The contents can be stably stored, and can be suitably used particularly for contents that change in quality due to the presence of air (oxygen). The discharge port of the contents is closed by the Rondel molded body 18 before opening, and the sealing performance during storage is perfect. The discharge port is, for example, a protrusion provided on the cap or a separate protrusion. Thus, it can be easily formed by tearing the Rondel molded body part of the sealed spout 20.
Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples.

Example 1
A laminate was produced by the following procedure.
(Production of first laminate and second laminate)
A urethane adhesive (Rock Paint Co., Ltd. RU004) is coated on the corona-treated surface of a polyethylene film (PEF) (Tamapoly Co., Ltd. UB-3) having a thickness of 50 μm, and after drying, a 16 μm thick is coated thereon. A-PET (Toray Film Processing Co., Ltd. F865) was dry laminated to produce a first laminate.
Separately from the above, an acid-modified polyolefin resin (EMAA) (Mitsui DuPont Polychemical Co., Ltd.) was applied to the corona-treated surface of a polyethylene film (PEF) (Tamapoly Co., Ltd. UB-3) having a thickness of 50 μm by extrusion lamination. Nucrel N0908C) was laminated to a thickness of 30 μm, and a 50 μm thick aluminum foil (AL) (Toyo Aluminum Co., Ltd. 8079) was further laminated on EMAA to produce a second laminate.
(Preparation of a laminate for Rondel molded body (a))
Using the first laminated body and the second laminated body, a laminate for a Rondel molded body (a) was produced by the following procedure.
The 2nd laminated body was sent to the feeding roller of the dry laminator which installed the hot roll and the cooling roll, and it set so that AL surface of the said 2nd laminated body might contact | connect a hot roll and a cooling roll. The surface temperature of the heat roll at the heat treatment set temperature was 190 ° C., and the surface temperature of the cooling roll was 20 ° C. The laminate was transported at a transport speed of 50 m / min and subjected to heat treatment and cooling treatment.
Thereafter, a urethane adhesive (Rock Paint Co., Ltd. RU004) is coated on the AL surface of the second laminate, and after drying, the A-PET surface of the first laminate of Example 1 is the adhesive surface. The first laminate and the second laminate were laminated so as to be in contact with each other, and a laminate (a) for a Rondel molded article having the following configuration was produced.
PEF (50 μm) / A-PET (16 μm) / AL (50 μm) / EMAA (30 μm) / LDPEF (50 μm)
(Production of Rondel molded body (a))
A Rondel molded body comprising a truncated cone-shaped shoulder, a cylindrical head connected to the shoulder, and a sealed spout by deep drawing using the laminate (a) for the Rondel molded body (A) (Head height 12 mm, outer diameter Φ10 mm) was prepared. This was inserted into the shoulder portion of the laminate tube to prepare a tube container, filled with toothpaste (Sato Pharmaceutical “Ace”) as the contents, and stored at 60 ° C. The Rondel molded body (a) was cut out from the tube container before and after storage, and the cross section was visually checked for delamination. The results are shown in Table 1.

(Comparative Example 1)
(Preparation of laminate for Rondel molded body (b))
Using the first laminate and the second laminate produced in Example 1, a Rondel molded product laminate (b) was produced according to the following procedure.
On the AL surface of the second laminate of Example 1, a urethane adhesive (Rock Paint Co., Ltd. RU004) is coated, and after drying, the A-PET surface of the first laminate of Example 1 is the adhesive. The first laminate and the second laminate were laminated so as to be in contact with the surface, and a laminate (b) for a Rondel molded article having the following configuration was produced.
PEF (50 μm) / A-PET (16 μm) / AL (50 μm) / EMAA (30 μm) / LDPEF (50 μm)
(Production of Rondel molded body (b))
A Rondel molded body comprising a truncated cone-shaped shoulder, a cylindrical head connected to the shoulder, and a sealing spout by deep drawing using the laminate (b) for Rondel molded body. (B) (Head height 12 mm, outer diameter Φ10 mm) was prepared. This was inserted into the shoulder portion of the laminate tube to prepare a tube container, filled with toothpaste (Sato Pharmaceutical “Ace”) as the contents, and stored at 60 ° C. The Rondel molded body (b) was cut out from the tube container before and after storage, and the cross section was visually checked for delamination. The results are shown in Table 1.

(Comparative Example 2)
(Preparation of laminate for Rondel molded body (c))
A laminate (c) for Rondel molded body was produced by the following procedure.
A urethane adhesive (Rock Paint Co., Ltd. RU004) is coated on the corona-treated surface of a polyethylene film (PEF) (Tamapoly Co., Ltd. UB-3) having a thickness of 50 μm, and after drying, a 15 μm thick is coated thereon. An easy-adhesive nylon substrate (ON) (Unitika Co., Ltd. ONM-BRT) was dry laminated to produce a first laminate.
Separately from the above, urethane adhesive is coated on one surface of 16 μm thick A-PET (Toray Film Processing Co., Ltd .: F865), and 50 μm thick aluminum foil (AL) (Toyo A second laminate was produced by laminating aluminum 8079) by a dry laminating method. Thereafter, a urethane adhesive (Rock Paint Co., Ltd. RU004) is coated on the AL surface of the second laminate, and after drying, the ON surface of the first laminate is in contact with the adhesive surface. One laminate and the second laminate were laminated to produce a laminate (c) for Rondel molded body having the following configuration.
(Production of Rondel molded body (c))
Using a laminate (c) for Rondel molded body, a Rondel molded body comprising a frustoconical shoulder, a cylindrical head connected to the shoulder, and a sealed spout (by deep drawing) ( c) (Head height 12 mm, outer diameter Φ10 mm) was prepared. This was inserted into the shoulder portion of the laminate tube to prepare a tube container, filled with toothpaste (Sato Pharmaceutical “Ace”) as the contents, and stored at 60 ° C. Before and after storage, the shoulder portion of the tube container was cut in the longitudinal direction, and the cross section was visually observed to confirm the presence or absence of delamination of the Rondel molded body (c). The results are shown in Table 1.
PEF (100 μm) / ON (15 μm) / AL (50 μm) / A-PET (16 μm)

(Comparative Example 3)
A laminate (d) was produced by the following procedure.
A 50 μm thick aluminum foil (AL) (Toyo Aluminum Co., Ltd. 8079) is coated on both sides with urethane adhesive (Rock Paint Co., Ltd. RU004), dried and then 150 μm thick polyethylene film (PEF) (Tamapoly) (UB-3) was laminated by a dry laminating method to produce a laminate (d) having the following constitution.
PEF (150 μm) / AL (50 μm) / PEF (150 μm)
Although deep drawing was performed using the laminate (d), delamination occurred at the interface between the aluminum foil and the polyethylene film, and it was impossible to mold the Rondel molded body.

  The laminate (a) for the Rondel molded body and the Rondel molded body (a) used in Example 1 have good barrier properties without causing delamination and pinholes before and after the storage test. Was.

  By using the Rondel molded body obtained by molding the laminate for the Rondel molded body of the present invention, it is possible to provide a tube container particularly excellent in barrier properties, and to stably store the contents in the tube container.

It is a laminate for a Rondel molded product of the present invention. It is a figure explaining the process of shape | molding the laminated body for Rondel molded objects of this invention, and manufacturing a Rondel molded object. It is sectional drawing of the principal part which shows the structure of one Example which used the Rondel molded object produced by shape | molding the laminated body for Rondel molded objects of this invention for the shoulder part and mouth neck part of a tube container.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Laminated body for molded bodies 2 Unstretched thermoplastic resin layer 3 Metal foil protective layer 4 Metal foil layer 5 Adhesive resin layer 6 Thermoplastic resin layer 7 First laminate 8 Second laminate 9 Circular composite sheet 10 Shoulder 11 Head 12 Top 13 First molded body 14 Second molded body 15 Third molded body 16 Fourth molded body 17 Fifth molded body 18 Rondel molded body 19 Tube container 20 Sealed extraction port 21 Body Part 22 Tube container shoulder and mouth / neck part 23 continuous to it Outer molded resin 24 Tube container shoulder 25 mouth / neck part

Claims (8)

  It is a laminate for a Rondel molded body comprising a frustoconical shoulder, a cylindrical head connected to the shoulder, and a sealed spout, and the sealed spout can be broken by protrusions. The laminate is a laminate for a Rondel molded body comprising at least an unstretched thermoplastic resin layer, a metal foil protective layer, a metal foil layer, an adhesive resin layer, and a thermoplastic resin layer from the outside.   The laminate for a Rondel molded body according to claim 1, wherein the metal foil protective layer is formed of at least two layers.   The laminate for a Rondel molded body according to claim 1 or 2, wherein the thermoplastic resin layer of the laminate for the Rondel molded body is formed of low-density polyethylene.   A metal foil protective layer is laminated on one surface of the unstretched thermoplastic resin layer via an adhesive to form a first laminate, and an adhesive resin layer is formed on one surface of the thermoplastic resin layer. After forming a second laminated body by laminating a metal foil layer on the adhesive resin layer, the second laminated body is subjected to heat treatment and cooling treatment, and on the metal foil protective layer surface of the first laminated body A laminate for a Rondel molded body according to any one of claims 1 to 3, wherein the metal foil layer surface of the second laminated body is bonded to each other through an adhesive. Production method.   The method for producing a laminate for a Rondel molded body according to claim 4, wherein the heat treatment is performed by contacting a heat roll with the metal foil layer surface.   The method for producing a laminate for a Rondel molded body according to any one of claims 4 to 5, wherein the cooling treatment is performed by contacting a cooling roll on the metal foil layer surface.   A lamellar molded body according to claim 1, which is manufactured by deep drawing, a frustoconical shoulder, a cylindrical head connected to the shoulder, and a sealing A Rondel molded body comprising a spout, wherein the sealed spout can be broken by a protrusion.   A cylindrical body is formed from a multilayer laminate having gas barrier properties, and a tube container shoulder and a continuous neck and neck are integrally formed in the upper opening of the body, and the tube container shoulder and The tube container characterized by integrally forming the Rondel molded body according to claim 7 on the inner surface of the mouth-and-neck portion continuous therewith.