WO2007043198A1 - 閉鎖型チューブの頭部形成方法、閉鎖型チューブの製造方法及び閉鎖型チューブ容器 - Google Patents
閉鎖型チューブの頭部形成方法、閉鎖型チューブの製造方法及び閉鎖型チューブ容器 Download PDFInfo
- Publication number
- WO2007043198A1 WO2007043198A1 PCT/JP2006/304110 JP2006304110W WO2007043198A1 WO 2007043198 A1 WO2007043198 A1 WO 2007043198A1 JP 2006304110 W JP2006304110 W JP 2006304110W WO 2007043198 A1 WO2007043198 A1 WO 2007043198A1
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- WO
- WIPO (PCT)
- Prior art keywords
- mandrel
- tube container
- head
- tube
- closed
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
- B65D35/02—Body construction
- B65D35/12—Connections between body and closure-receiving bush
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D51/00—Closures not otherwise provided for
- B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
- B65D51/20—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing
- B65D51/22—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing having means for piercing, cutting, or tearing the inner closure
- B65D51/221—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing having means for piercing, cutting, or tearing the inner closure a major part of the inner closure being left inside the container after the opening
- B65D51/222—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing having means for piercing, cutting, or tearing the inner closure a major part of the inner closure being left inside the container after the opening the piercing or cutting means being integral with, or fixedly attached to, the outer closure
- B65D51/223—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing having means for piercing, cutting, or tearing the inner closure a major part of the inner closure being left inside the container after the opening the piercing or cutting means being integral with, or fixedly attached to, the outer closure the outer closure having to be removed or inverted for piercing or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C2043/3665—Moulds for making articles of definite length, i.e. discrete articles cores or inserts, e.g. pins, mandrels, sliders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2001/00—Articles provided with screw threads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2251/00—Details relating to container closures
- B65D2251/0003—Two or more closures
- B65D2251/0006—Upper closure
- B65D2251/0015—Upper closure of the 41-type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2251/00—Details relating to container closures
- B65D2251/0003—Two or more closures
- B65D2251/0068—Lower closure
- B65D2251/0093—Membrane
Definitions
- the present invention is used for storing food, seasonings, cosmetics, medicines, toothpastes, adhesives, creams, etc.
- a tube container having a closed head has been developed from the viewpoint of preventing modification of contents, etc., for a tube container for storing foods, pharmaceuticals, industrial products, hair dyes and the like.
- Such tube containers are typically of the types called aluminum tubes and laminate tubes, and the former uses aluminum slag in the cavity and presses the aluminum slag by intruding the mandrill into the cavity.
- Patent Document 1 an aluminum tube having a head portion and a trunk portion is obtained (Patent Document 1).
- a laminated tube is obtained by previously rolling a flat laminated sheet into a cylindrical shape and forming a cylindrical body portion with side seams, and then attaching an oral portion to the body portion.
- the body part cutting and welding method in the laminated tube is described in Patent Document 2, and the head forming method for attaching the oral head to the body part includes a compression method as shown in Patent Document 3 and the like. Is mentioned.
- the contents of the tube container for storing food, pharmaceuticals, industrial products, hair dyes, etc. are required to be protected.
- gas barrier properties and light shielding properties which are concerned about the oxidation of the contents due to the invasion of oxygen by external force and the concern that volatile components contained in the contents will be scattered outside.
- the aluminum tube is integrally formed of aluminum with high content protection, the mouth and body with a closure membrane at the opening, the content protection sufficiently satisfies the required characteristics.
- the contents of the mouth part formed by the compression method are plastic or plastic materials, and the body part and the mouth part are not molded. It is a concern for protection.
- the material constituting the inner and outer layers of the body portion of the laminate tube is a polyolefin resin from the viewpoint of thermal processability, chemical stability, flexibility, water resistance, versatility, safety and hygiene, material cost, etc.
- polyethylene is used on a commercial basis, and as a material of the mouth and head, the viewpoint of adhesiveness to the body part. Polyethylene is often used, and the content protection of this part becomes a problem.
- a closure membrane is often formed to protect the contents, but if the mouth is closed with polyethylene, it becomes difficult to open the mouth during use, so the mouth opening is closed with a separate member. There is also a need.
- Aluminum tubes are currently used as tube containers for storing pharmaceutical products that require high content protection.
- Aluminum tubes are less resilient than laminated tubes. For this reason, there is a high demand for laminate tubes in the industry due to problems such as difficulty in use due to deformation during use and poor printability.
- the laminated tube is manufactured by creating a cup-shaped closing material 42 by deep drawing with a laminating raw reaction force using A1 foil or the like as a core material. It fits into the locking part 41 which is the tip of the.
- the inner diameter of the convex portion of the closing member 42 formed in a cup shape is slightly smaller than the outer diameter of the locking portion 41 that is the tip of the mandrel 40.
- the closure 42 can be held without dropping off by using the elasticity, repulsion, dead-holding properties and frictional force of the closure 42. I will.
- the molten resin 46 placed in the cavity 45 is pressed, and the hole pin 47 is used to open the opening in the oral cavity.
- a compression method is known in which a closed head is formed on the tube body while forming.
- the closed-type tube container manufactured in this way first breaks the front end surface of the convex portion of the closing material exposed in the opening of the oral head with a needle-like object.
- the closure material needs to be strong enough to withstand deep drawing and the like, the force for breaking through the closure material with a needle-like material is greater than the bonding force between the closure material and the mouth.
- the closure material dropped into the tube container.
- the closure material (i) can withstand deep drawing, (ii) has sufficient shape retention in the compression process after deep drawing, and (m) can be reliably opened with needles.
- ⁇ and (m) have a trade-off relationship.
- Patent Document a structure in which the outer peripheral surface of the convex portion of the closing material bites into the back surface of the oral portion of the closing material has been known in order to enhance the bonding force between the closing material and the oral head.
- a projecting part is formed on the outer peripheral surface of the convex part of the closure material in the deep drawing process, and then the projection is formed. Then, the closure material is fitted to the mandrel, and the head is formed by the compression method. It had been. However, it is necessary to form a protrusion on the outer peripheral surface of the convex portion of the closure material in advance, and when the protrusion is machine-formed, the tip of the protrusion becomes weak or may be broken. there were. In addition, when forming the oral head by the compression method, the protrusion formed on the outer peripheral surface of the convex part of the closure material acts as an obstacle, and the molten resin does not go well to the tip of the oral cavity. There were also problems.
- Patent Document 1 JP 2005-161370 A
- Patent Document 2 Japanese Patent Publication No. 61-2489
- Patent Document 3 Japanese Patent Publication No. 64-7850
- Patent Document 4 Japanese Patent Publication No. 3-20337
- Patent Document 5 Japanese Patent Laid-Open No. 2002-192546
- Patent Document 6 Japanese Utility Model Publication No. 62-69438
- the inventor forms an annular corner portion on the outer peripheral portion of the front end surface of the convex portion of the closure material. It was discovered that it was effective to surround it with molten resin. At that time, the present inventors also found that the supporting force of the closing material is not sufficient unless the angular width of the annular corner portion is uniformly thinned from the root to the tip.
- the present inventor has created the following forming method in order to solve the above problems.
- the present invention relates to a method for forming a head in a closed-type tube that uses a compression method to form an oral head with a closing member attached to the tube body, and includes a protrusion-like locking at the end of a mandrel
- a cup-shaped closure material having a convex part on the part is fitted with a space between the back side of the convex part front surface of the closure material and the anchor part front end of the mandrel, and then melted in the mold cavity
- the front end surface of the convex portion of the closing material is folded by pressing the hole pin having the outer periphery of the front end smaller than the outer periphery of the front end surface of the convex portion of the closing material against the front end surface of the convex portion of the closing material.
- molten resin used as a material for the oral cavity, thermal processability, flexibility, water resistance, chemical resistance, versatility, safety and hygiene, material cost, etc.
- Polyolefin resin, especially polyethylene is preferable. .
- the tube body portion is made of a material having gas normality, whether it is a cylindrical laminated tube or a polytube.
- a laminate tube is manufactured by using a three-layered laminated sheet made of a shielding material as an intermediate layer, for example, with an inner layer and an outer layer being a sealant. It is formed as a shape.
- a polyolefin resin especially a low density polyethylene resin layer
- LDPE low-density polyethylene
- L LDPE linear low-density polyethylene-based resin
- unstretched polypropylene-based resin and the like may be used.
- the shielding material for example, aluminum foil, alumina-deposited PET, silica-deposited PET, ethylene butyl alcohol, silica-deposited polyamide, or nylon-based resin is used. Of these, aluminum foil is preferably used.
- a multilayer polytube is suitable.
- an inner layer is formed with a sealant by an extrusion molding method, and an outer layer made of a plastic material having a shielding property, such as ethylene butyl alcohol or nylon-based resin, is laminated by an extrusion molding method.
- a polyolefin resin especially a polyethylene resin
- ethylene rubonic acid copolymer is used. Coalescence (EMAA or EAA) is preferred.
- EAA Coalescence
- a two-component reaction type adhesive may be used. Although this method provides the initial adhesive strength, it is susceptible to the penetration of content components and attacks, especially with many solvent components. In many cases, the contents are filled and the adhesive layer is destroyed to cause delamination.
- the cup-shaped closing material is preferably composed of a synthetic resin sheet.
- a polyolefin resin film as the outermost layer that comes into contact with the outside air.
- Polyolefin-based resin films are characterized by their elongation and the difficulty of tearing, particularly required for the outermost layer, in deep drawing.
- the material used for the outermost layer has a portion that comes into contact with the outside air and at the same time is joined to the mouth of the tube container, a material that has good heat-welding properties to the mouth is preferable.
- polyolefin-based resin is preferred as the oral material, and therefore, polyolefin-based resin, particularly polyethylene-based resin, is preferably used for the outermost layer of the closure material.
- polyolefin-based resin particularly polyethylene-based resin
- L-LDPE among polyethylene-based resins is particularly suitable because it has excellent deep drawing and folding processability.
- any polyolefin resin can be used as long as it has heat-sealability with the resin inside the mouth of the tube container.
- the first biaxially stretched polyester film, the metal foil, and the second biaxially stretched polyester film are laminated in this order on the inside of the polyolefin-based resin that is the outermost layer.
- the first and second biaxially stretched polyester films play an important role in reinforcing the metal foil and adjusting the strength balance between the inside and outside of the metal foil.
- PET polyethylene terephthalate
- PET polyethylene isophthalate
- polybutylene terephthalate polyethylene naphthalate
- a biaxially stretched nylon film having excellent toughness can also be used.
- the metal foil general foil or alloy foil such as aluminum foil, stainless steel foil, copper foil, etc. can be used. However, aluminum foil and aluminum alloy are available from the viewpoint of availability, price, and good elongation. A foil is particularly preferred.
- the present invention provides a gap between the back side of the front end surface of the convex portion of the closing material and the front end of the locking portion of the mandrel. Power 0.5mn! 5.
- the gap between the back side of the front end of the convex part of the closure material and the front end of the locking part of the mandrel is less than 0.5 mm, sufficient annular corners cannot be formed.
- the gap between the back side of the front end surface of the convex portion of the closing material and the front end of the locking portion of the mandrel is more preferably 1. Omm to 3.5 mm.
- the present invention is the head forming method described in the above (1) or (2), wherein a concave portion is formed on a tip surface of the hole pin.
- a hole pin 49 according to the present invention as shown in FIG. FIG. 9 (b) is a cross-sectional view taken along the line bb in FIG. 9 (a).
- the recess 50 at the tip of the hole pin is recessed in a concave shape.
- a communication hole 58 is drilled at the bottom.
- the concave part does not have to be a concave curved surface as shown in the figure!
- the tip surface R of the tip portion of the mandrel 22 that can be attached to and detached from the die or the die as shown in FIG. 10 is formed in a convex curved shape.
- the mold is matched with the hall pin 49 according to claim 3, it is possible to stably form the corners that protrude evenly outward from the circumference where the closing material fitted by the rounded effect of the tip surface is difficult to slip. it can.
- the tip surface of the mandrel convex it is possible to flexibly cope with the norelation of the material thickness of the closure material and the setting of the mold.
- the present invention is the tube body portion in which the mandrel is formed with an oral head having one end opened and the other end closed with a closing material, and the hollow portion of the tube body portion is formed.
- a hollow portion of the tube body is disposed at the end of the supporting mandrel and the mandrel.
- the supported horizontal position pivots to a vertical position to form an oral head to which a closing material is attached.
- the mandrel is externally fitted to a fixed portion and is composed of a sleeve that can slide back and forth.
- a method for forming a head of a closed-type tube wherein a mandrel is used in which movement due to its own weight is suppressed by a magnet when the sleeve is in the vertical position.
- the sleeve is slidable back and forth with respect to the fixed portion.
- the sleeve slides in front of the fixed portion in accordance with the movement of the tube container. Air is filled into the hollow portion from the air supply groove provided in the sleeve through the inside of the sleeve, and the deformation and collapse of the tube body portion due to the decompression of the hollow portion is prevented.
- the tube container is mounted on the mandrel again, and the sleeve returns to the original position while contacting the inner surface of the tube body.
- the mandrel is rotated to the horizontal position force / vertical position and the molding process proceeds to a predetermined closing side, the sleeve is held at the normal position by the inner surface of the tube container.
- the present invention prevents the sleeve from being displaced due to its own weight by using a magnet.
- FIG. 11 shows an example in which the mandrel according to the present invention is applied to a mold for forming the mouth of the tube container, and is a partial cross-sectional explanatory view of the mold.
- 23 is a fixing part
- 28 is a sleeve
- 29 is a mandrel that supports the tube body part
- 39 is an air supply groove
- 59 is a magnet.
- FIG. 11 shows a state in which the sleeve has advanced with respect to the fixed portion. This is a state in which the sleeve moves forward against the magnetic force of the magnet 59 as the tube moves when the completed tube container is pulled out.
- the air force S between the sleeve S and the fixed portion is supplied from the air supply groove 39 provided in the mandrel toward the tube container that has been decompressed, and the tube The deformation and collapse of the container can be prevented.
- the sleeve is then loaded with the unformed mouth tube body in the next molding cycle. When worn, it is pushed to the mandrel and attracted to the magnet to return.
- the process proceeds to the step of forming the oral head on the tube attached to the mandrel.
- the mandrel is brought into a vertical state.
- the force sleeve is securely held in its normal position by the magnet against its own weight. Therefore, even if the inner diameter of the attached tube is large, the sleeve will not be displaced.
- a spring or the like can be considered in addition to the magnet.
- the spring always applies force to the sleeve to return to the normal position, and when the tube container is extracted after molding, sufficient air is supplied to compensate for the decompression of the hollow part in the tube container.
- the sleeve may return to the normal position before the operation, and the predetermined action cannot be performed reliably.
- the mandrel end portion may be constituted by a magnet, or a small magnet may be embedded in the sleeve or mandrel end portion.
- the sleeve for supplying air to the hollow portion where the pressure is reduced is surely forward when extracting the molded product.
- the mold When the mold is in a vertical state, it moves stably and is held in a normal position without any displacement by the magnet. Therefore, since the sleeve can always mold the closed portion at the normal position, it does not cause molding defects.
- a convex portion is formed on a protruding locking portion at the end of a mandrel.
- a cup-shaped closing material having a gap between the back side of the front end surface of the convex portion of the closing material and the front end of the locking portion of the mandrel, and then placing molten resin in the mold cavity.
- the outer periphery of the closure member is folded by pressing the hole pin having a tip outer periphery smaller than the outer periphery of the projection tip surface of the closure material against the projection tip surface of the closure material.
- An annular corner is formed in the part, and a mandrel is press-fitted into the mold cavity and the annular corner is surrounded by press-filling molten resin into the cavity to form an oral head with a closure.
- the gap between the rear side of the front end surface of the convex portion of the closure material and the locking front end of the mandrel is 0.5mn! 5.
- the gap between the back side of the front end surface of the convex portion of the closing material and the end of the locking portion of the mandrel is more preferably 1. Omm to 3.5 mm.
- the mouth of the tube is molded in a pressurized state until the end of cooling, so that the product has a beautiful finish without causing radial irregularities due to the closure material and the cover state not being defective. Can be obtained.
- the present invention is a closed tube in which a mouth is formed by attaching a cup-shaped closing material having a convex portion to the tube body portion, and is formed on the outer peripheral portion of the front end of the convex portion of the closing material.
- An annular corner is embedded in the oral cavity, the angular length of the annular corner is 0.1 to 1.5 mm, and the angular width is 2 to 3 times that of the closing fabric.
- the tube body is formed by laminating a polyester film on both sides of a metal foil as a base material, the mouth is formed of a polyester-based resin, and the closure material Is a closed tube container according to (11) above, characterized in that it comprises a laminated sheet having a metal foil as a base material and an innermost layer formed of a polyester-based resin.
- the laminated sheet of the body portion of the tube container according to the present invention uses a metal foil as a barrier layer and an inner and outer surface made of a polyester film.
- a structure in which a resin film is laminated, a biaxially stretched polyester resin film is laminated on the outer surface side, and an unstretched polyester resin is laminated on the outermost layer in the same manner as the inner layer is preferred.
- a polyolefin resin layer may be provided in the intermediate layer to obtain flexibility as required.
- polyurethane or the like may be interposed as an adhesive layer between the layers.
- the tube container of the present invention uses a polyester-based resin on the entire inner surface of the trunk and the mouth, so that it has excellent non-adsorbability of components from the contents in contact with it. There is no transfer of ethylene odor to objects.
- a metal foil is used as the barrier layer of the body portion and a cup-like member is formed by deep drawing of a laminated sheet using the metal foil as a base material on the inner surface side of the mouth, the tube container of the present invention Is completely gas and light-shielding and has excellent chemical resistance.
- the tube container according to the present invention can prevent escape of scent components and volatile components of the contents and conversely prevent oxygen from entering, so that the quality of the contents can be maintained for a long time. Can do.
- the constituent material used in the present invention is excellent in mechanical strength in both the body portion and the mouth portion, and can also maintain the heat sealing property required for the working process during molding.
- the tube container according to the present invention is gas opaque and opaque and has a light-shielding property, it is particularly suitable as a container for pharmaceuticals and foods where useful components may be altered by light.
- the foil is preferably an aluminum foil.
- a cup-shaped closing material is attached from the inner surface side of the oral head, and the contents are smoothed.
- the body and the mouth of the tube container of the present invention can be colored by blending a pigment as necessary.
- the closure material includes a polyolefin resin film, a first biaxially stretched polyester film, a metal foil, a second biaxially stretched polyester film, and a polyamide film from the outer layer side.
- a film obtained by coextrusion and stretching of a polyolefin resin film sandwiched between Each of the closed tube containers described in (11) above is formed by laminating via an adhesive layer.
- a polyolefin resin film is used as the outermost layer.
- Polyolefin resin films have the elongation and difficulty of tearing required for the outermost layer especially in drawing.
- the outermost layer of the closing material before being attached to the mouth is in contact with the outside air, and is joined to the inner surface of the mouth of the tube container by the compression method. Therefore, since the oral head is often formed of polyethylene, it is preferable to use polyethylene as the polyolefin-based resin because of its heat-weldability with the inner surface of the oral head. Further, among polyethylenes, linear low density polyethylene (L-LDPE) has particularly excellent drawability and can be preferably used.
- L-LDPE linear low density polyethylene
- Polyolefin resin may be any low-density polyethylene (LDPE), high-density polyethylene (HDPE), or ethylene, as long as it has heat sealability with the resin on the inner surface of the mouth of the laminated tube container.
- LDPE low-density polyethylene
- HDPE high-density polyethylene
- ethylene ethylene
- EVA -Vinyl acetate copolymer
- CPP polypropylene
- a first biaxially stretched polyester film, a metal foil, and a second biaxially stretched polyester film are laminated in this order.
- the first and second biaxially stretched polyester films play an important role in reinforcing the metal foil and adjusting the strength balance between the inside and outside of the metal foil.
- the closure material according to the present invention can obtain drawability that can be sufficiently adapted to actual production.
- PET is preferable because it is easily available and tough, but polyethylene isophthalate, polybutylene terephthalate, polyethylene naphthalate, and the like can also be used.
- the metal foil general foil such as aluminum foil, stainless steel foil, copper foil, or alloy foil such as JIS 8079 material can be used. Aluminum foil and aluminum alloy foil are particularly preferred.
- a film having a three-layer structure in which a polyamide film is sandwiched between polyolefin resin films is co-extruded and arranged by stretching.
- the polyolefin resin which is the substantial innermost layer, is chemically inert and prevents cracking during drawing, which is strong against cracks.
- a polyamid sandwiched between polyolefin resin The pin is softer than PET and other polyesters, prevents pinholes during drawing, and is more durable against alkaline substances.
- this three-layer film (three-layer film)
- the mechanical strength of the film becomes stronger, and tearing during drawing can be surely prevented. It can also improve the nourishing effect on the penetration of water.
- the closure material While it is difficult to tear during drawing, the closure material must have good tearability when opened, but by stretching, it is easier to tear with a needle because the elongation is lower than unstretched film. Become.
- a three-layer film may be biaxially stretched after coextrusion. When biaxially stretched, it was cut in two directions at the time of opening, so it was found that the ease of opening was markedly improved compared to conventional closing materials.
- the total thickness of the three-layer film is preferably 15 to 60 / ⁇ ⁇ , more preferably 20 to 30 m.
- the central polyamide film is preferably 8 to 15 m, more preferably 9 to 15 m.
- a three-layer film is usually formed by laminating a very thin adhesive resin layer between each layer.
- polyethylene is preferable.
- linear low density polyethylene is also preferable because of the above reason.
- nylon is particularly preferable because of its high resistance to penetration of the contents and strong alkali resistance.
- nylon for example, 6-nylon, 66-nylon, 11 nylon, MXD6 nylon and the like can be used.
- each layer is preferably laminated by an adhesive with a dry laminating method.
- a polyolefin-based resin film is formed on this film (for example, a PET surface).
- an extrusion laminating method may be used in which an anchor coating agent is applied to the resin and the resin is extruded.
- the thickness of each layer is preferably 20 to 60 m for polyolefin resin film, particularly 30 to 40 m force S.
- the first and second polyester films are preferably 12 to 25 ⁇ m, but 12 ⁇ m produces a sufficient effect.
- the metal foil is preferably 30 to 70 ⁇ m, particularly preferably 40 to 60 m.
- the preferred thickness of the three-layer film is as described above.
- the closed-type tube container having the above-described configuration does not break during drawing processing in which the closure material contained therein is strong and strong against tension.
- open with the opening needle The tearability at the time of opening is improved and can be opened easily. Furthermore, even when the content is strong, it exhibits excellent durability, and can be used for tube containers of any application regardless of the content.
- the closing material comprises a metal foil as a base material, a biaxially stretched polyester film or a biaxially stretched polyamide film is laminated on both surfaces thereof, and at least one of the outer sides thereof,
- polyester film used in the present invention polyethylene terephthalate is particularly preferred because of its availability and isotropic force, but it is not limited thereto, and polyethylene isophthalate, polybutylene terephthalate, polyethylene naphthalate, etc. may be used. it can.
- This polyester film is biaxially stretched and laminated on both sides of the aluminum foil.
- this unstretched polyolefin film linear low density polyethylene film is particularly preferred.
- the metal foil according to (15) for example, an aluminum foil having a thickness of 20 to 60 m, and as a biaxially stretched polyolefin film, a biaxially stretched polypropylene film having a thickness of 15 to 40 ⁇ m, a biaxially stretched height is used.
- a density polyethylene film or a biaxially stretched linear low density polyethylene film is preferred.
- the adhesive layer a solvent or solvent-free one-component or two-component curable urethane adhesive is preferred.
- the same biaxially stretched polyolefin film as described above is applied to one side of the aluminum foil as described above.
- a biaxially stretched polyester film or a biaxially stretched nylon film having a thickness of 12 to 25 m is laminated on the other surface of the aluminum foil with the above adhesive layer, and further on this surface.
- the biaxially stretched polyolefin film is laminated through the adhesive layer.
- This laminated material is further improved in the effect of preventing the metal foil from being broken or broken by laminating biaxially stretched polyester or biaxially stretched nylon, and when these films are laminated on the inner layer side of the tube container, the laminate material is resistant to damage. Content suitability is also improved.
- the laminated material according to the present invention is preferably laminated on the inner layer side of the tube so that either side of the laminated material is in contact with the oral grease material, preferably the biaxially stretched polyester or the biaxially stretched nylon film side is also suitable for molding. .
- the present invention is the above (11) to (16), wherein the closed tube container has a tube cap having a threaded portion that fits into a mouth of the closed tube container. It is the closed type tube container described in any one.
- the tube cap has a conical shape having a longitudinal ridge line portion formed by providing a concave curved surface on the circumferential side on the opposite side of the threaded portion that fits into the oral head. It has a projection with a body, and the ridge surface of the ridge line is formed into a bulging arc surface!
- the tube cap includes a cone-shaped body having a longitudinal ridge line portion formed by providing a concave curved surface on the peripheral side on the opposite side of the threaded portion that fits into the oral head.
- the basic shape of the cone may be a conical shape, a bell shape, or a pyramid shape.
- a plurality of concave curved surfaces are formed, and the number of ridge lines formed by them is suitably 3 or 4. Most preferred is 3.
- the ridge surface is preferably formed in a bulging arc surface shape. Further, it is preferable that the ridge line itself has a bulging round at the base and an opposite round at the tip.
- the tube body part is unscrewed from the mouth head, inverted, and the conical protrusion is inserted from the mouth head, and the closure material inside is broken. Then, the closing material is cut by a plurality of ridges and separated into small pieces. Each piece is cut in a curl shape with a small area, so the resistance is reduced, and the contents and the tube container force are pressed when pushing out, preventing the passage from being blocked and narrowed.
- FIGS. 13 (a) to 13 (f) show an example of the tube cap.
- the tube cap body 61 has recessed portions 62 and 63 on the upper and lower sides, and the recessed portion 62 has an oral cavity. It has a protrusion 64 for breaking the closure material inside the part. Further, the recessed portion 63 has a threaded portion 65 that is screwed into the mouth of the container.
- the tip end portion of the protrusion 64 basically has a conical shape, and three ridge lines 67 are formed by three concave curved surfaces.
- the ridge surface 68 is formed in a bulging arc surface as a whole.
- the ridge line itself is divided into a and b parts, and the a part of the base part adds a bulging alarm to increase the stability, and the b part of the tip part is sharpened with a reverse radius and a closure material. Is easy to break.
- FIG. 15 shows another example of the tube cap according to the present invention, in which four ridge lines 67 are formed from the apex. This is effective for relatively large-diameter tube containers
- the stress at the time of filling and filling the molten resin is used when forming the mouth with the closing member attached to the tube body using the compression method.
- an annular corner can be formed on the outer peripheral portion of the front end surface of the convex portion of the closing material, and the mouth can be formed so as to be surrounded by molten resin, and the closing material drops into the container when opened.
- the raw material for the tube body was manufactured by laminating. Next, the tube body is cut into 80mm X I 30mm and the tube body is made into 7 pieces.
- Aluminum foil Q [IS8079, thickness 50 m] of both sides with an adhesive biaxially oriented PET [Thickness 12 / zm] were laminated respectively.
- L-LDPEZNyZL—LDPE three-layer coextrusion film (total thickness 20 / ⁇ ⁇ , each layer thickness 5 ⁇ 10 ⁇ 5 m) on one PET surface, and L-LDPE [thickness on the other PET surface] 30 m] were laminated by a dry lamination method through an adhesive.
- the raw material for closure materials of the laminated tube container of this invention was manufactured.
- As the adhesive a two-component reaction type urethane adhesive was used.
- the layer structure of the original fabric for the closure material is: L LDPEZ biaxially stretched PETZA1 Z2 axis stretched PETZ special composite film (L LDPE / Ny / L LDPE coextruded biaxially stretched film) The thickness was 124 ⁇ m.
- closure material produced as described above was deep-drawn using the punching machine shown in FIG.
- Fig. 1 is a cross-sectional view of a punching machine that deep-draws the closure material.
- the punching machine according to the present invention comprises an upper mold 1 and a lower mold 2.
- the upper mold 1 has a removable core pin 3 inserted therein.
- the top of the core pin 3 is on the flange 4 It has become. Increasing the number of washers 6 placed under the flange 4 causes the core pin 3 to retreat in the direction of the arrow (upward in the figure), thereby lowering the convex portion of the closing material.
- FIG. 2 (a) is a perspective view of the closure material 22 after deep drawing formed into a cup shape.
- FIG. 2 (b) is a perspective view showing a state of the annular corner 30 embedded in the oral cavity using the compression method described later.
- 3 to 5 are cross-sectional views of a head molding machine for forming an oral head on the tube body using the compression method.
- a cup-shaped closing member 22 formed by the above-described deep drawing process on a protruding locking part 21 at the tip of a mandrel 20 having a tube body part 12 attached to the outer peripheral surface 22 To fit.
- the bulkiness of the closing material 22 is formed to be larger than the height of the locking portion 21 of the mandrel 20 (1), the back side of the front end surface of the convex portion of the closing material 22 and the locking portion 2 of the mandrel 20
- 1 Space P is formed between the tip.
- the maximum length of 1 that forms the space p depends on the tube diameter, mandrel tip diameter, closure material depth, mouth design, etc. 0.5 to 5 Omm is desirable.
- It is preferably 1.0 to 3.5 mm. If it is less than 5 mm, the angular length of the annular corner will be shortened. If it exceeds 5. Omm, it will be difficult to fold the annular corner, and the tip of the annular corner may protrude from the surface of the mouth. There is.
- a molten resin 26 is arranged around the hole pin 27 in the cavity 25 of the molding machine.
- the melted resin 26 high-density polyethylene resin was used.
- the tip diameter 1 (8) is smaller than the diameter 1 (( ⁇ . 4mm) of the tip 21 of the anchoring portion 21 of the mandrel 20.
- FIG. 4 is an enlarged view of the tip surface of the hall pin 27.
- R30 on the tip of the hall pin 27 A concave portion having a curved surface is formed.
- the diameter 1 of the recess is 7.6 mm, and the width 1 of the outer periphery is 0.
- a communication hole 44 is formed in the hole pin axial direction from the center of the curved surface.
- the mandrel 20 is press-fitted into the mold 25 and the molten resin 26 is press-filled into the cavity 25.
- the molten resin 26 first spreads in the direction of the arrow (in the direction of the outer periphery in the figure) by pressing with the mandrel 20 to form a portion corresponding to the shoulder of the tube container.
- the molten resin 26 hangs along the outside of the annular corner 30 and surrounds the annular corner so that the tip force of the annular corner 30 also turns in the direction of the arrow.
- the annular corner portion 30 receives a pressure balanced from the outer ring and the inner ring of the annular portion, and the tip end surface of the convex portion of the closing material 22 is folded, so that the root force is uniformly thinned to the tip.
- the formed annular corner 30 is formed.
- the closing material is attached to the tube body portion with sufficient bonding strength.
- the cross-section generated by exposing the end portion of the mouth formed by the molten resin 26 by allowing the bottom 24 of the closure material to bite into the molten resin 26 inside the tube body 12. Can prevent the infiltration of the contents.
- FIG. 6 is a cross-sectional view showing a state of the formed oral head.
- an oral head 31 is formed at the tip of the tube body portion 33 by molten grease.
- the oral head 31 is formed with a screwing portion 38 for screwing a cap to be described later.
- a closing member 22 is bonded to the inside of the oral head 31 and an annular corner 30 is formed in the vicinity of the opening.
- the angular length 1 of the annular corner 30 depends on the size and design of the container.
- 0.1 to 1.5mm force is preferred! / ⁇ . More preferably, it is 0.2 to 1. Omm, and more preferably 0.3 to 0.8 mm.
- Angular length 1 of the annular corner depends on the depth of the closure
- the molten grease 26 in the direction of the arrow in FIG. 5 (b) will be prevented from wrapping around, and the annular corner 30 may protrude from the front end of the mouth. Also, if the angular length 1 of the annular corner 30 is less than 0.1 mm, the locking effect will decrease,
- the angular width (1) depends on the thickness of the closure material, but it is 2 to 3 times the thickness of the closure material.
- FIG. 7 is a perspective view showing the inside of the cap and tube container (especially the mouth).
- the cap 35 After fitting the tube container 34 with the oral head 36 formed on the mandrel, the cap 35 is screwed onto the oral head 36 of the tube container 34 by a screw fitting device (not shown). In the recess formed above the cap 35, a needle-like object 37 for breaking through the closing material 22 is formed. The cap 35 is screwed to the tube container 34 so as to cover the upper surface of the closing member 22 in the opening part of the mouth part by screwing with the screw part 38 of the mouth part 36 of the tube container.
- the tube body is attached to the mandrel of the head molding machine shown in Fig. 3 (a), and the above-mentioned closure materials are sequentially fitted to the mandrel's locking part, and the tube body is then attached to the tube body by the compression method.
- the oral head was formed.
- we prepared three types of molten resin HJ362 manufactured by Nippon Polyethylene Co., Ltd.: 0.9g, 1.lg, 1.3g, and two types of hole pin diameters of ⁇ 8 ⁇ and ⁇ 4mm.
- the tube containers were prepared and combined as shown in Table 1.
- the manufactured tube container was cut in the axial direction to obtain a sample No. 1 to 18 by exposing the cross section.
- the angular length and angular width of the annular corner in the cross section of these samples were measured.
- Chu Table 1 shows the manufacturing conditions and measurement results of the container. However, as for the angular width, only the aluminum foil portion was measured with a gauge, and the value obtained by adding other layer thicknesses was described.
- the tube container having a closure material with an angular corner of the annular corner exceeding 1.5 mm has a remarkable appearance due to hindering the flow of the molten resin during compression molding or exposing the corner on the upper surface of the opening. Only the damaged products could only be obtained.
- the corner length was less than 0.1 mm, the locking effect by the corner was remarkably impaired, and the closure material dropped off during opening.
- Samples with a narrow annular corner are Sample No. 2, and in the following ascending and descending order, Sample Nos. L, 7, 8, It was 5, 10, 6, 13, 4, 11. Sample No. 15 has a wide annular corner, and was 18, 3, 17, 9, 12, 16, 14 in descending order.
- FIG. 1 is a cross-sectional view of a punching machine for deep drawing a closing material.
- FIG. 2 is a perspective view showing a closing material after deep drawing. (a) shows a closing material fitted to the tip of a mandrel, and (b) is a perspective view of the closing material showing an annular corner portion embedded in a mouth after compression molding.
- FIG. 3 is a cross-sectional view of a head molding machine for forming a head on the tube body.
- FIG. 4 is an enlarged cross-sectional view of a hole pin.
- FIG. 5 is a cross-sectional view of a head molding machine for forming a head on a tube body.
- FIG. 6 is a cross-sectional view showing the state of the oral head in the tube container according to the present invention.
- FIG. 7 is a conceptual diagram showing a tube container according to the present invention to which a cap is attached.
- FIG. 8 is a cross-sectional view of a conventional head molding machine for forming a head on the tube body. A tip portion for fitting a closing material in the mandrel
- FIG. 9 is a view showing an example of a hall pin according to the invention of claim 3.
- (A) is a perspective view
- (b) is a cross-sectional view taken along line bb.
- FIG. 10 is a cross-sectional view showing a tip structure of a mandrel according to the invention of claim 4.
- FIG. 11 is a view showing a mandrel structure showing a state in which the sleeve according to the invention of claim 5 is advanced with respect to the fixed portion.
- FIG. 12 is a cross-sectional view showing a state in which the bottom of the closing material is embedded in the oral cavity.
- FIG. 13 shows an example of a tube cap according to the present invention.
- A is a perspective view
- (d) is a side view
- (e) is a bottom view.
- (f) is a bottom view.
- FIG. 14 is a view showing a protrusion for breaking through the closing material.
- FIG. 15 is a plan view showing another example of the tube cap according to the present invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tubes (AREA)
- Closures For Containers (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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CN2006800382777A CN101287581B (zh) | 2005-10-12 | 2006-03-03 | 封闭式管件的头部形成方法、封闭式管状容器及制造方法 |
DE112006002709T DE112006002709B4 (de) | 2005-10-12 | 2006-03-03 | Verfahren zum Bilden eines Kopfabschnitts einer Tube des geschlossenen Typs, Verfahren zum Herstellen eines röhrenförmigen Behälters des geschlossenen Typs und röhrenförmiger Behälter des geschlossenen Typs |
JP2007539807A JP4415048B2 (ja) | 2005-10-12 | 2006-03-03 | 閉鎖型チューブの頭部形成方法、閉鎖型チューブの製造方法及び閉鎖型チューブ容器 |
US11/597,338 US7906056B2 (en) | 2005-10-12 | 2006-03-03 | Method for forming head part of closed-type tube, method for manufacturing closed-type tubular container, and closed-type tubular container |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2005297122 | 2005-10-12 | ||
JP2005-297122 | 2005-10-12 |
Publications (1)
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WO2007043198A1 true WO2007043198A1 (ja) | 2007-04-19 |
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PCT/JP2006/304110 WO2007043198A1 (ja) | 2005-10-12 | 2006-03-03 | 閉鎖型チューブの頭部形成方法、閉鎖型チューブの製造方法及び閉鎖型チューブ容器 |
Country Status (5)
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US (1) | US7906056B2 (ja) |
JP (1) | JP4415048B2 (ja) |
CN (1) | CN101287581B (ja) |
DE (1) | DE112006002709B4 (ja) |
WO (1) | WO2007043198A1 (ja) |
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CN110304328B (zh) * | 2019-02-03 | 2021-08-20 | 珠海新一代复合材料有限公司 | 具有复合瓶口的金属瓶及其制备方法 |
WO2024002773A1 (de) | 2022-06-28 | 2024-01-04 | Alupak Ag | Verschluss mit gewinde aus metall zum verschliessen eines behälters und verfahren zur herstellung |
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CN102066090B (zh) * | 2008-06-25 | 2014-09-17 | 高露洁-棕榄公司 | 制作带有膜屏障内衬的肩部/管嘴的方法 |
JP2010023400A (ja) * | 2008-07-23 | 2010-02-04 | Dainippon Printing Co Ltd | ロンデル成形体用積層体、その製造方法、ロンデル成形体、及びそれを用いたチューブ容器 |
JP2010023399A (ja) * | 2008-07-23 | 2010-02-04 | Dainippon Printing Co Ltd | ロンデル成形体用積層体、その製造方法、ロンデル成形体、及びそれを用いたチューブ容器 |
JP2010083546A (ja) * | 2008-09-30 | 2010-04-15 | Yoshino Kogyosho Co Ltd | アルミラミネートチューブ容器 |
JP2012245696A (ja) * | 2011-05-27 | 2012-12-13 | Toppan Printing Co Ltd | チューブ容器の口部製造装置 |
CN105235190A (zh) * | 2015-09-30 | 2016-01-13 | 安徽省雅琪力天家居用品有限公司 | 一种吹瓶机的口杯杯芯 |
JP2019127310A (ja) * | 2018-01-26 | 2019-08-01 | 藤森工業株式会社 | 注出口閉鎖体及び注出口閉鎖体の製造方法 |
JP7137932B2 (ja) | 2018-01-26 | 2022-09-15 | 藤森工業株式会社 | 注出口閉鎖体及び注出口閉鎖体の製造方法 |
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CN101287581A (zh) | 2008-10-15 |
US20090057322A1 (en) | 2009-03-05 |
JP4415048B2 (ja) | 2010-02-17 |
US7906056B2 (en) | 2011-03-15 |
CN101287581B (zh) | 2013-02-06 |
DE112006002709B4 (de) | 2013-03-21 |
JPWO2007043198A1 (ja) | 2009-04-16 |
DE112006002709T5 (de) | 2008-08-28 |
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