JP6051576B2 - Laminated tube container and manufacturing method thereof - Google Patents

Description

The present invention relates to a laminate tube container and a manufacturing method thereof, and more particularly to a laminate tube container capable of reducing the residual amount of contents and a manufacturing method thereof .

  Conventionally, a laminated tube container has been manufactured by various methods. For example, a laminated sheet is manufactured, and an outermost layer and an innermost layer at both ends thereof are heat-sealed to manufacture a cylindrical body, and thereafter There is a laminated tube container in which a head portion including a mouth portion, a shoulder portion, and the like is formed in one opening portion of a cylindrical body portion, and a cap is screwed into the mouth portion. The laminated tube container manufactured above is filled with a semi-fluid content such as toothpaste from the open end of the cylindrical body, and the open end is hermetically sealed to form a bottom seal portion. Thus, a tubular package product can be obtained.

  For example, Patent Document 1 discloses a laminate tube container in which a plurality of grooves that facilitate folding the shoulder portion inward are provided in the shoulder portion as a laminate tube container that can reduce the remaining amount of contents. .

  Patent Document 2 discloses a laminate tube container in which the inclination angle of the shoulder is 35 ° or more, which is larger than the conventional 30 °, as a laminate tube container capable of reducing the remaining amount of contents. Yes.

  However, in the laminated tube container of Patent Document 1, although the contents in the shoulder can be squeezed out, it is necessary to perform positioning (alignment) along the circumferential direction of the tube container when connecting the cylindrical body and the head. Therefore, there is also a problem that the molding process becomes complicated.

  In the laminated tube container of Patent Document 2, since the head portion is formed by the compression molding method, a certain degree of rigidity is required. It was still difficult to crush with a finger. For this reason, at the last stage of the extrusion of the contents in the container, there is a problem that the contents that cannot be used remain on both sides of the body part near the shoulder part.

Japanese Patent No. 3844916 JP 2010-126203 A

Therefore, in order to solve the above problem, an object of the present invention is to provide a laminated tube container capable of reducing the residual amount of contents, and a method for manufacturing the same.

The above object is achieved by the present invention described below. That is, the manufacturing method of the laminated tube container of the present invention is a manufacturing method of a laminated tube container in which the head is connected to the upper end opening of the cylindrical body, and the head includes a cylindrical mouth portion, A cylindrical pressing part having an inner diameter larger than the diameter of the mouth part extending in the lower vertical direction of the mouth part, and a shoulder part connecting the lower end part of the pressing part and the upper end opening part of the cylindrical body part And the resin forming the head is made of a transparent thermoplastic resin whose contents can be seen from the outside of the head, and the pressing portion is formed to be elastically deformable, And the said head is connected with the upper end opening part of the said cylindrical trunk | drum by the compression molding method, It is characterized by the above-mentioned.

Moreover, the manufacturing method of the laminated tube container of this invention is characterized by the said shoulder part extending horizontally from the lower end side of the said press part in the above.

Moreover, the manufacturing method of the laminated tube container of this invention WHEREIN: The said press part is a polygonal column shape, a truncated cone shape, or a column shape, It is characterized by the above-mentioned.

Moreover, the manufacturing method of the laminated tube container of this invention is characterized by the thickness of the said press part being in the range of 0.5 mm or more and 1.0 mm or less.

Moreover, the manufacturing method of the laminated tube container of this invention is characterized by the said cylindrical trunk | drum being formed from the multilayer laminated sheet which has gas barrier property.
The laminate tube container of the present invention is a laminate tube container in which a head portion having a shoulder portion and a mouth portion is connected to an upper end opening of a cylindrical body portion, and the head portion has a cylindrical mouth. A cylindrical pressing portion having an inner diameter larger than the diameter of the mouth portion extending in the lower vertical direction of the mouth portion, a lower end portion of the pressing portion, and an upper end opening portion of the cylindrical body portion The resin forming the head is made of a transparent thermoplastic resin whose contents can be seen from the outside of the head, and the pressing part is elastically deformable. The pressing portion is polygonal or elliptical.

  Since the laminated tube container of the present invention can push out the contents remaining in the head at the end of use by providing an elastically deformable pressing part between the shoulder part and the mouth part constituting the head part, The effect is that the consumer can use up the contents to the end.

It is a front view which shows 1st Embodiment of the laminate tube container concerning this invention. It is a top view of the laminate tube container of FIG. FIG. 2 is a cross-sectional view taken along line AA of the laminate tube container of FIG. 1. It is a top view which shows 2nd Embodiment of the laminate tube container concerning this invention. FIG. 5 is a cross-sectional view taken along line AA of the laminate tube container of FIG. 4. It is a top view which shows 3rd Embodiment of the laminate tube container concerning this invention. FIG. 7 is a cross-sectional view taken along line AA of the laminate tube container of FIG. 6. It is sectional drawing which shows the layer structure of the trunk | drum for laminated tube containers concerning this invention. It is a schematic half-sectional view showing a laminate tube container of a conventional example.

(First embodiment)
Next, a first embodiment of a laminated tube container according to the present invention will be described with reference to the drawings.
A front view of the laminate tube container according to FIG. 1 is shown, FIG. 2 is a plan view thereof, and FIG. 3 is a cross-sectional view of the pressing portion.
As shown in FIG. 1, the laminate tube container has a configuration in which the body portion forming laminated sheet is rolled up and the both end portions are overlapped, and the overlapping portion is welded to the upper end of the body portion 5 formed into a cylindrical shape. The head 1 is configured to be welded and fixed at the outer peripheral end of the shoulder 4.
The head portion 1 includes a cylindrical mouth portion 2, a cylindrical pressing portion 3 having an inner diameter larger than the diameter of the mouth portion extending in the lower vertical direction of the mouth portion 2, a lower end portion of the pressing portion 3, and a cylindrical body. The shoulder part 4 which connects the upper-end opening part of the part 5 is provided.
After that, the laminated tube container 10 according to the present invention is manufactured by attaching a sealing cap to the mouth of the head formed as described above.
The laminated tube container 10 manufactured above is filled and packaged with an appropriate amount of contents such as toothpaste, for example, from the other opening of the cylindrical body 5, and then the opening is welded. By forming the bottom seal portion 52, it is possible to manufacture a packaged product composed of the laminated tube container 10 filled and packed with the contents.

  The user pushes the trunk of the laminated tube container and extrudes the contents from the mouth for use. When the content is consumed and the remaining amount is reduced, the residue collects in the head that is more difficult to deform than the torso. In this state, the user can squeeze the contents by picking and pressing the pressing portion of the head with one hand.

  As shown in FIGS. 2 and 3, the shape of the pressing portion 3 according to the first embodiment is preferably a polygonal polygonal column shape because the user can easily grip it.

The head 1 is molded from a thermoplastic resin using a compression molding method, and is melt-bonded to the cylindrical body 5. The laminate sheet for forming the laminate of the trunk is laminated with a material highly compatible with the heat-fusible resin of the head 1.
The thermoplastic resin constituting the head 1 has, for example, a low-density polyethylene resin, a linear low-density polyethylene resin, a high-pressure method low-density polyethylene resin, a medium-density polyethylene resin, and a density polymerized using a single-site catalyst of 0. 880 g / cm ^{3 to} 0.925 g / cm ^{3 of} an ethylene-α · olefin copolymer, a resin obtained by blending the above resin with a high-density polyethylene resin, or the like can be used.
Among the above heat-fusible resins, it is preferable that the linear low-density polyethylene resin is used because the pressing part 3 is excellent in the elastic deformability of the pressing part 3.
In addition, among the above heat-fusible resins, high-density polyethylene resin is blended with linear low-density polyethylene resin in terms of compression moldability, that is, heat resistance and thermal adhesiveness with the cylindrical body. It is preferable to use a resin.

  The resin forming the head 1 is preferably made of a transparent thermoplastic resin. As a result, the contents can be seen from the outside of the head, so that the user can squeeze out while checking how much the contents remain in the head.

  Since the pressing portion 3 has a cylindrical configuration having an inner diameter larger than the diameter of the mouth portion 2 to which the cap is screwed, the pressing portion 3 can be easily gripped and the contents can be easily squeezed out by the pressing portion 3. The length of the pressing portion 3 is preferably in the range of 10 mm to 20 mm because gripping is easy.

The thickness of the pressing portion 3 is preferably in the range of 0.5 mm or more and 1.0 mm or less because the pressing portion is easily deformed and the residual contents in the head can be squeezed out without difficulty.
If the thickness of the pressing portion 3 is less than 0.5 mm, it is not preferable from the viewpoint of strength, and if it exceeds 1.0 mm, the pressing portion is deformed and is difficult to squeeze out.

  If the shoulder portion 4 has a structure extending horizontally from the lower side of the pressing portion 3, the resistance against the longitudinal load becomes high and the longitudinal load can be stably received. It is preferable because the contents remaining in the head can be efficiently squeezed out.

(Second Embodiment)
Next, a second embodiment of the laminated tube container according to the present invention will be described with reference to the drawings. 4 shows a plan view of the laminate tube container according to the present invention, and FIG. 5 shows a cross-sectional view of the pressing portion.
As shown in FIGS. 4 and 5, it is preferable that the shape of the pressing portion 3 of the second embodiment is an elliptical truncated cone shape because the shape is easy for a user to grip.

(Third embodiment)
Next, a third embodiment of the laminated tube container according to the present invention will be described with reference to the drawings. 6 shows a plan view of the laminated tube container according to the present invention, and FIG. 7 shows a cross-sectional view of the pressing portion.
As shown in FIGS. 6 and 7, the shape of the pressing portion 3 of the third embodiment is preferably a shape that is easy for a user to grip when the cross-sectional shape is formed in an elliptical columnar shape.
The examples given above are merely examples of the laminated tube container of the present invention, and the present invention is not limited thereby.

Next, in the present invention, a method for producing a body portion forming laminated sheet, a laminated tube container, and the like will be described.
FIG. 8: shows sectional drawing of the layer structure of the laminated sheet for trunk | drum formation for laminated tube containers concerning this invention.
As shown in FIG. 8, the layer structure of the body portion forming laminated sheet 20 is composed of the heat-sealable film 11 in order from the outermost layer to the innermost layer, and the base material layer 12 having the pattern printing layer 13 formed on one side, The barrier layer 14 and the heat-sealable film 11 are laminated via the adhesive layer 15.
Although not shown, a melt-extruded layer of a heat-fusible resin may be further laminated on the heat sealable film on the outermost layer side.
Furthermore, a printed pattern layer such as a pattern and characters may be formed on the melt-extruded layer of the heat-fusible resin.
In addition, printed pattern layers such as patterns and characters can be provided in advance on one side of the heat-sealable film.

(Heat sealable film)
First, in the body laminate sheet of the present invention, the material constituting the heat-sealable film may be any material that can be melted by heat and fused to each other. For example, a low density polyethylene film (LDPE), medium density Polyolefin resin such as polyethylene film (MDPE), high-density polyethylene film (HDPE), linear (linear) low-density polyethylene film (LLDPE), polypropylene film, polyethylene or polypropylene, acrylic acid, methacrylic acid, maleic acid, Acid-modified polyolefin resin film modified with maleic anhydride, fumaric acid, itaconic acid, and other unsaturated carboxylic acids, polyvinyl acetate resin film, polyester resin film, polystyrene resin film, polyacrylonitrile, saturated polyester Le, can be used one or a film consisting of more other resin polyvinyl alcohol.
In the present invention, as the above heat-sealable film, for example, one or more of the above-mentioned resins as a main component, and a desired additive is optionally added thereto to prepare a resin composition, Next, using the resin composition prepared above, a film or sheet can be formed using, for example, a T-die method, an inflation method, or other forming methods.
In the present invention, the film thickness of the heat-sealable film is preferably 50 μm to 150 μm.
In the present invention, for example, an anti-blocking agent, a lubricant (fatty acid amide, etc.), a flame retardant, an inorganic or organic filler, etc. may be optionally added to the above heat-sealable film. it can.

(Melt extruded layer of heat-fusible resin)
In the present invention, a melt-extruded layer of a heat-fusible resin can be further formed outside the heat-sealable film. As described above, as the material of the melt-extruded layer of the heat-fusible resin, the cylindrical body is manufactured by rolling up the body-forming laminated sheet and welding the polymerization end part thereof. It is preferable to use a resin having heat sealability that can be fused to each other and that can be extruded. Among these, it is desirable to use a resin having heat sealability that can form a printed pattern layer by a gravure printing method, a flexographic printing method, or the like.
Specifically, examples of the resin having the heat sealing property include low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), linear (linear) low density polyethylene ( LLDPE), polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, Polyolefin resins such as ethylene-propylene copolymer, methylpentene polymer, polybutene polymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, polyethylene or polypropylene were acid-modified using unsaturated carboxylic acid. Acid-modified polyolefin resin It can be used other resins.

(Print pattern layer)
The print layer such as a pattern is not particularly limited as long as it is a position that can be seen from the outside of the laminate tube, and can be formed by surface printing on a melt-extruded layer of a heat-fusible resin formed on the outside of the heat-sealable film. . Since the contents can be displayed by front printing, the description contents can be easily changed. In addition, what performed back surface printing to the heat sealable film of the outermost layer side can also be used.
The printing layer is composed of one or more ordinary ink vehicles as the main component, and if necessary, a plasticizer, a stabilizer, an antioxidant, a light stabilizer, an ultraviolet absorber, a curing agent, and a crosslinking agent. 1 to 2 or more kinds of additives, lubricants, antistatic agents, fillers and other additives are optionally added, and colorants such as dyes and pigments are added, and kneaded thoroughly with solvents, diluents, etc. Thus, an ink composition obtained by adjusting the ink composition can be used. Examples of such ink vehicles include linseed oil, drill oil, soybean oil, hydrocarbon oil, rosin, rosin ester, rosin-modified resin, shellac, alkyd resin, phenolic resin, maleic acid resin, natural resin, carbonized resin. Hydrogen resin, polyvinyl chloride resin, polyacetic acid resin, polystyrene resin, polyvinyl butyral resin, acrylic or methacrylic resin, polyamide resin, polyester resin, polyurethane resin, epoxy resin, urea resin, melamine resin, One or more of aminoalkyd resins, nitrocellulose, ethylcellulose, chlorinated rubber, cyclized rubber, etc. can be used in combination.
In addition to gravure printing, the printing method may be letterpress printing, screen printing, transfer printing, flexographic printing, or other printing methods.

(Base film)
Next, in the present invention, as a material constituting the base film, for example, as a basic material constituting a laminated tube container, it has excellent properties in mechanical, physical, chemical, etc. A resin film or sheet having strength and toughness and having heat resistance can be used.
Specifically, for example, a polyester resin, polyamide resin, polyaramid resin, polyolefin resin, polycarbonate resin, polyacetal resin, fluorine resin, other tough resin film or sheet, or the like is used. Can do.
And as said resin film thru | or sheet | seat, any things, such as an unstretched film or the stretched film extended | stretched to the uniaxial direction or the biaxial direction, can be used. Among these, in the present invention, a biaxially stretched polyester resin film is preferable because it is excellent in terms of printability.
The thickness of the film is about 5 μm to 50 μm, preferably about 10 μm to 25 μm.

(Barrier layer)
In the present invention, as a material constituting the barrier layer, for example, a gas barrier material against oxygen gas, water vapor or the like, a light shielding material against sunlight, or a material having a fragrance retaining property or the like is used. be able to.
Specifically, the barrier material includes, for example, an aluminum foil, tin, lead, copper, iron, nickel, or an alloy thereof, or a resin film or sheet having a deposited thin film such as aluminum. A barrier layer can be used.
As the aluminum foil, an aluminum foil having a thickness of about 5 μm to 20 μm can be used, and as a resin film or sheet having a deposited thin film such as aluminum, for example, a vacuum deposition method, a sputtering method, an ion A resin film in which a vapor-deposited thin film of a metal such as aluminum is formed on a resin film by using a physical vapor deposition method (Physical Vapor Deposition method, PVD method) such as a plating method or a cluster ion beam method. Sheets can be used.
More specifically, for example, using a wind-up type vapor deposition machine, in a vacuum chamber, a film of the resin from the unwinding roll is put into the vapor deposition chamber, where it is heated in a crucible. The vapor deposition source is evaporated, and if necessary, a vapor deposition film of a metal such as aluminum is formed on the cooled resin film on the coating drum through a mask while oxygen is blown out from the oxygen blowing port. A resin film having a deposited thin film of metal such as aluminum can be produced by forming a film and then winding the resin film on which the deposited thin film is formed on a winding roll.
In the present invention, in the resin film having the above-described vapor deposited thin film of metal such as aluminum, oxygen gas or water vapor is prevented from permeating and functions as a barrier substrate for these. It is what you play.
In the above, the thickness of the vapor deposited aluminum thin film is usually preferably about 50 to 3000 mm in order to obtain a sufficient barrier property, and particularly preferably about 100 to 2000 mm in the present invention.
Examples of the resin film that supports the above-described aluminum deposited thin film include polyester film, polyamide film, polyolefin film, polyvinyl chloride film, polycarbonate film, polyvinylidene chloride film, polyvinyl alcohol film, and ethylene-vinyl acetate. A polymer saponified film or the like can be used.
In order to improve the adhesion of the vapor deposition film, for example, the surface of the resin film can be coated with a vapor deposition primer or the like, and other necessary pretreatments can be optionally performed.

  In the present invention, examples of the barrier material or the material having aroma retaining property include, for example, polyvinylidene chloride resin, polyester resin, MXD polyamide resin, ethylene-vinyl acetate copolymer (vinyl acetate). A film or sheet of an ethylene-vinyl alcohol copolymer, polyvinyl alcohol, polyacrylonitrile, or other resin having a high gas barrier property, or a completely saponified ethylene content of 25 to 50 mol%. A membrane can be used.

Next, in the above-described present invention, a method for producing a laminated sheet for forming a laminated tube container according to the present invention using the above-described materials will be described. As such a method, an ordinary packaging material is produced. Laminating method used when performing, for example, wet lamination method, dry lamination method, solvent-free dry lamination method, extrusion lamination method, T-die coextrusion molding method, coextrusion lamination method, inflation method, other arbitrary methods Can be done.
And in this invention, when performing said lamination, if necessary, pre-treatments, such as a corona treatment and an ozone treatment, can be given to a film, for example.

(Adhesive layer)
In the present invention, an adhesive layer can be formed as a layer for adhering a heat-sealable film, a substrate film, a barrier layer and the like. As resin which comprises an adhesive layer, it can select suitably with resin which comprises the film to adhere | attach.
For example, anchor coating agents such as isocyanate (urethane), polyethyleneimine, polybutadiene, and organic titanium, or polyurethane, polyacryl, polyester, epoxy, polyvinyl acetate, cellulose, and other laminates Anchor coating agents such as adhesives for laminating, adhesives for laminating, and the like can be arbitrarily used.
Examples of the heat-bondable adhesive layer include polyethylene, polypropylene, linear low density polyethylene, ethylene-vinyl alcohol, ethylene-methacrylic acid copolymer, ethylene-acrylic acid copolymer, ionomer, and maleic anhydride modified. A polyolefin resin or the like can be preferably used.
If the thickness of the adhesive layer of the heat-fusible resin is 15 μm to 60 μm, the adhesiveness is excellent.
In the body layer laminated sheet, the heat-sealable film, the base film, and the gas barrier layer are bonded via the heat-sealable resin adhesive layer, but the heat-sealable resin adhesive layer is limited to one layer. In addition, two or more adhesive layers of heat-fusible resin may be laminated. Thereby, the outstanding adhesiveness is securable. For example, when the gas barrier layer 17 is an aluminum foil, an acid-modified polyolefin resin such as an ethylene-methacrylic acid copolymer or an ethylene-acrylic acid copolymer can be laminated on the aluminum foil. Adhesion can be stabilized by laminating the acid-modified polyolefin resin.

(Laminated tube)
The laminate tube of the present invention is formed into a cylindrical shape by joining both side portions of the laminated film for body part, and the overlapping part of the laminated film for body part is joined by heat fusion to form a tubular body part.
As a heat sealing method for forming the cylindrical body portion, known methods such as a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, an ultrasonic seal, and a flame seal can be used.

The head of the tube container of the present invention can be molded by a compression molding method.
The method for forming the head portion of the tube container according to the present invention was extruded in an annular shape onto the upper molding die (male die) portion of the mandrel to which the cylindrically formed barrel member was attached, using an extrusion device. The molten mixed resin is dropped, and then moved to the compression molding portion where the other molding die (female mold) is arranged, and the mold is closed with the molding die (female die) from above the molten mixed resin, By compressing and cooling, the head portion of the tube container can be formed at the upper opening end of the cylindrical body member and thermally welded.
The above-mentioned extrusion device has a discharge port that opens in an annular shape on the outside of the lower part, and is moved up and down by an air cylinder above it, and the molten mixed resin that has been quantitatively extruded from the discharge port in an annular manner is supplied to the discharge port. A frayed shutter portion is provided for fraying along the outer peripheral surface and dropping downward.

Since the bottom of the laminate tube container is used as a filling port for the contents, it is an unsealed opening before filling the contents, and is sealed by thermal bonding after filling the contents.
As said content, foodstuffs, such as a paste wasabi, cosmetics, such as face-wash cream, toiletries, such as toothpaste, a pharmaceutical, etc. can be filled.

A thread for attaching a cap is provided on the outer peripheral surface of the mouth.
The cap is usually manufactured by injection molding, and a screw that engages with a screw thread provided on the outer peripheral surface of the mouth portion of the tube container main body is provided on the inner peripheral surface of the side wall. Can be configured to have vertical streaks to prevent slipping when the cap is attached or removed.
Also, although not shown in the figure, before the cap is attached, for example, a biaxially stretched polyethylene terephthalate film, an aluminum foil, and a polyethylene resin sealant layer are sequentially laminated from the outside to the mouth of the tube container main body. A sealing material having such a structure can be thermally bonded to improve sealing performance.

EXAMPLES Next, although an Example is given and this invention is demonstrated concretely, these Examples do not restrict | limit this invention at all.
Example 1
A laminated tube container was manufactured according to the following.

(Laminate sheet for trunk formation)
A biaxially stretched polyethylene terephthalate film (trade name “E5200”, manufactured by Toyobo Co., Ltd.) having a thickness of 12 μm and subjected to corona discharge treatment on one side is used as a base film. The film was applied by gravure printing so that the thickness of the film became 3 μm.
Next, a two-component curable urethane adhesive (manufactured by Rock Paint Co., Ltd., trade name “ADLOCK RU004”) is applied to the printed surface so that the coating amount when dried is 3 g / m ^2, and the barrier layer is thick. A 9-μm thick aluminum foil is laminated, and on the back side of the aluminum foil, a two-component curable urethane adhesive (trade name “ADLOCK” manufactured by Rock Paint Co., Ltd.) is applied so that the coating amount when dried is 3 g / m ^2. RU004 ") was applied, and a 130 [mu] m-thick low-density polyethylene film as a heat-sealable film, manufactured by DNP Technopack Co., Ltd., trade name" SR-WN ") was laminated.
Next, on the surface side biaxially stretched polyethylene terephthalate film of the laminate laminate, a two-component curable urethane adhesive (trade name, manufactured by Rock Paint Co., Ltd.) so that the coating amount when dried is 3 g / m ^2. "Adlock RU004") is applied, and a low-density polyethylene film with an antistatic agent with a thickness of 130 μm (trade name “SR-WNAS”, manufactured by DNP Technopack Co., Ltd.) is laminated, and a laminated sheet for body formation Got.

  The layer structure of this body portion forming laminated sheet is as follows: from the outermost layer to the innermost layer, a low-density polyethylene film 130 μm / 2-component curable urethane adhesive layer / biaxially stretched polyethylene terephthalate film 12 μm / 2-component curable urethane Adhesive layer / aluminum foil 9 μm / 2-component curable urethane adhesive layer / low-density polyethylene film 130 μm.

(Cylindrical torso)
Next, using the laminated sheet for forming the body part produced above, first, the laminated sheet for forming the body part is punched to produce a blank plate having a width of 120 mm. A cylindrical body portion that becomes a body portion of a tube container having a diameter of 38 mm and a height of 150 mm is heat-sealed so that the inner surface is on the heat-sealable film side under a heat welding condition of 250 ° C. Manufactured.

(head)
Next, the cylindrical barrel manufactured above is mounted on a mandrel for forming a laminated tube container, and then, at one end of the cylindrical barrel, from a shoulder portion, a polygonal pressing portion and a pressing portion continuous therewith Using a resin composition obtained by blending 50 parts by weight of a linear low-density polyethylene resin with 50 parts by weight of a linear low-density polyethylene resin, a head composed of a cylindrical mouth part having a small diameter, and a resin temperature of 230 ° C. The laminate tube container according to the present invention was manufactured by molding using a compression molding method. The resin thickness at the head was 0.5 mm to 1.0 mm.
(Laminated tube container)
Next, the cap of the cylindrical body having the above-mentioned head is spiraled, and then 150 g of commercially available toothpaste is filled from the other opening of the cylindrical body, and then the opening of the cylindrical body is opened. The part was heat-sealed to produce a packaged product consisting of the laminated tube container shown in FIG.
Since the obtained laminated tube container was not colored in the resin forming the head, the remaining amount of the contents can be visually recognized from the outside of the head, the pressing part is easily gripped, and the pressing part is deformed. The residue of the contents was easily squeezed out.

(Example 2)
In the configuration of the laminated tube container of the first embodiment, a laminate tube of the second embodiment shown in FIG. 4 is manufactured by using the same configuration as that of the first embodiment except that the pressing portion is formed into a truncated cone shape. A container was prepared.
Since the obtained laminated tube container was not colored in the resin forming the head, the remaining amount of the contents can be visually recognized from the outside of the head, the pressing part is easily gripped, and the pressing part is deformed. The residue of the contents was easily squeezed out.

Example 3
In the configuration of the laminated tube container of the first embodiment, it is manufactured in the same manner as in the first embodiment except that the pressing portion is formed into an elliptical shape, and the laminated tube container of the third embodiment shown in FIG. Was made.
Since the obtained laminated tube container was not colored in the resin forming the head, the remaining amount of the contents can be visually recognized from the outside of the head, the pressing part is easily gripped, and the pressing part is deformed. The residue of the contents was easily squeezed out.

(Comparative Example 1)
In the configuration of the laminated tube container of Example 1, the head made of the shoulder and the mouth is prepared in the same manner as in Example 1 except that the head is made by the compression molding method. A laminate tube container was produced.
Specifically, the same body portion forming laminated sheet as in Example 1 was produced.
Next, using the laminated sheet for forming the body part produced above, first, the laminated sheet for forming the body part is punched to produce a blank plate having a width of 120 mm. The tubular body of a tube container having a diameter of 38 mm and a height of 150 mm was manufactured by superimposing with a width of 8 mm and heat sealing so that the inner surface was on the inner surface side under heat welding conditions of 250 ° C.
Next, the cylindrical body manufactured as described above is attached to a mandrel for forming a laminated tube container, and then, at one end of the cylindrical body, from a frustoconical shoulder and an opening of a narrow neck continuous therewith. The resulting head was molded by compression molding at a resin temperature of 250 ° C. using a high-density polyethylene resin composition to produce a laminated tube container according to the present invention.
Next, a cap is spiraled to the mouth of the cylindrical body having the above head, and then 150 g of commercially available toothpaste is filled from the other opening of the cylindrical body, and then the cylindrical body The package was made of a laminated tube container according to Comparative Example 1 shown in FIG.
The obtained laminated tube container has no pressing part at the head and the resin constituting the head is a hard resin, so it is difficult to crush the shoulder and squeeze out the residue of the contents in the shoulder. It was.

DESCRIPTION OF SYMBOLS 1 Head part 2 Mouth part 3 Press part 4 Shoulder part 5 Cylindrical trunk part 52 Bottom seal part 6 Trunk part seal part 7 Cap 10 Laminate tube container 11 Heat sealable film 12 Base film 13 Picture printing layer 14 Barrier layer 15 Adhesive layer 20 Laminate sheet for forming tube body

Claims (6)

A method for manufacturing a laminated tube container in which a head is connected to an upper end opening of a cylindrical body,
The head is a cylindrical mouth;
A cylindrical pressing part having an inner diameter larger than the diameter of the mouth part extending in the lower vertical direction of the mouth part;
A shoulder portion connecting the lower end portion of the pressing portion and the upper end opening portion of the cylindrical body portion;
And the resin forming the head is made of a transparent thermoplastic resin whose contents can be seen from the outside of the head,
And the said press part is formed so that elastic deformation is possible,
And the manufacturing method of the laminated tube container characterized by connecting the said head to the upper-end opening part of the said cylindrical trunk | drum by the compression molding method.   The method for producing a laminated tube container according to claim 1, wherein the shoulder portion extends horizontally from a lower end side of the pressing portion. The pressing portion of the can, polygonal, method for producing a laminated tubular container according to claim 1 or 2, characterized in that an elliptical shape or a cylindrical shape. The thickness of the said press part exists in the range of 0.5 mm or more and 1.0 mm or less, The manufacturing method of the laminate tube container in any one of Claims 1-3 characterized by the above-mentioned. The method for manufacturing a laminated tube container according to any one of claims 1 to 4 , wherein the cylindrical body is formed from a multilayer laminated sheet having gas barrier properties. A laminated tube container in which a head portion having a shoulder portion and a mouth portion is connected to an upper end opening portion of the cylindrical body portion, and the head portion has a cylindrical mouth portion,
A cylindrical pressing part having an inner diameter larger than the diameter of the mouth part extending in the lower vertical direction of the mouth part;
A shoulder portion connecting the lower end portion of the pressing portion and the upper end opening portion of the cylindrical body portion;
And the resin forming the head is made of a transparent thermoplastic resin whose contents can be seen from the outside of the head,
And the said press part is formed so that elastic deformation is possible,
And the said press part is polygonal shape or elliptical shape, The laminate tube container characterized by the above-mentioned.

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