WO2000000400A1 - Recipient composite - Google Patents

Recipient composite Download PDF

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Publication number
WO2000000400A1
WO2000000400A1 PCT/JP1999/003312 JP9903312W WO0000400A1 WO 2000000400 A1 WO2000000400 A1 WO 2000000400A1 JP 9903312 W JP9903312 W JP 9903312W WO 0000400 A1 WO0000400 A1 WO 0000400A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal
container body
lid
container according
metal lid
Prior art date
Application number
PCT/JP1999/003312
Other languages
English (en)
Japanese (ja)
Inventor
Yoshio Iwasaki
Takao Yoshikawa
Akira Morita
Original Assignee
Ishida Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ishida Co., Ltd. filed Critical Ishida Co., Ltd.
Priority to EP99925409A priority Critical patent/EP1033315A1/fr
Publication of WO2000000400A1 publication Critical patent/WO2000000400A1/fr

Links

Classifications

    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/06—Integral, or permanently secured, end or side closures
    • 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
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/14—Linings or internal coatings

Definitions

  • the present invention relates to a container used for a beverage can or a food can to which a partial open lid / a full-open lid is joined.
  • Landscape technology a container used for a beverage can or a food can to which a partial open lid / a full-open lid is joined.
  • Thermosetting resin paint such as polyepoxyphenol has been coated on the inner surface to prevent the metal odor from migrating to the contents and to prevent metal corrosion due to the contents.
  • Thermosetting resin paints such as polyepoxyphenol are applied by heating at 150 to 250 ° C for several minutes, but unreacted or low reacting substances such as residual solvents and substances used as raw materials are used.
  • Low molecular weight components such as hardeners and plasticizers used as high molecular weight substances and additives migrate to the contents of metal cans, impairing the original taste and aroma of foods and beverages, or being called environmental hormones It has been pointed out that unreacted substances of bisphenol A, which is a raw material of polyepoxyphenol, are eluted, which is undesirable for food safety and health.
  • laminated metal plates such as PET / iron plate, PET / aluminum plate, PP / iron plate, PP / aluminum plate have been developed as alternatives to the inner paint of metal cans. 61-149340, JP-A-63-111048, JP-A-63-111049, JP-A-6-320669, and Patent No. 2515581).
  • Such laminated metal plates are drawn to form a two-piece can body, welded to form a three-bead can body, and a metal lid is manufactured (Japanese Patent Application Laid-Open No. HEI 9-258572). 7-331196).
  • Such a laminated metal body and a laminated metal lid were joined by double winding, and at that time, a compound was interposed at the joint.
  • the present invention is intended to be used as a food can or a beverage can without using environmentally harmful materials such as epoxy phenol resin and compound.
  • the purpose is to provide a pressure-resistant container that can be used.
  • FIG. 1 is a cross-sectional view of a laminated metal steel sheet according to the present invention
  • FIG. 2 is a cross-sectional view of a laminated metal cover according to the present invention
  • FIG. FIG. 4 is an enlarged view
  • FIG. 4 is a sectional view of a container body according to the present invention
  • FIGS. 5 and 6 are enlarged partial views of the container body. Disclosure of the invention
  • a metal lid made of a metal plate whose inner surface is coated with polypropylene or polyester, and a container body whose inner surface is made of polypropylene or polyester are joined by high-frequency heating, respectively.
  • FIG. 1 shows a laminated metal steel sheet as an example of the material used in the present invention.
  • the laminated steel sheet is provided with an outer coating layer, a PP / modified PP layer, or a PET / adhesive resin layer 1 on the outer surface side of an iron plate or an aluminum plate 2.
  • the inner surface of the iron plate or aluminum plate 2 is made of PP or PET through the adhesive resin layer 3.
  • a coating layer 4 is provided.
  • the joint surface between the lid and the container body and the inner surface of the container in contact with the contents of the can are made of polypropylene (sometimes abbreviated as PP) or polyester.
  • PP polypropylene
  • polyester polyester
  • a copolymer with ethylene or the like may be used in addition to a usual propylene copolymer for molding.
  • Lamination of polypropylene on a metal lid or a body can be performed by a known technique, but usually, PP / modified PP (modified PP includes a maleic anhydride graft copolymer or the like). It can be obtained by heat welding the release film to a metal plate. The use of the modified PP ensures the adhesion between the metal surface and the polymer layer.
  • polyester used in the present invention polyethylene terephthalate (hereinafter sometimes abbreviated as PET) and a copolymer mainly composed of ethylene terephthalate repeating units are preferable.
  • the method of laminating the polyester on the metal surface can be performed by a known technique.
  • One of the methods is a method of heating a metal surface and thermally welding a PET laminating film thereon, as disclosed in Japanese Patent Application Laid-Open No. 7-90094.
  • Another method is to apply an adhesive polymer having an affinity for metal and polyester to one side of a polyethylene terephthalate film, and form a polyester surface on the metal surface via the adhesive polymer layer. It is.
  • As a laminating method using such an adhesive polymer it is preferable to use a method disclosed in Japanese Patent No. 2515581 or the like.
  • a metal such as an iron plate or an aluminum plate, which is usually used as a container material, is used.
  • a known pretreatment is performed. be able to.
  • the lid is used to ensure the required pressure resistance for long-term storage of food or beverage cans
  • a metal plate (usually 0.10 to 0.40 mm in thickness, preferably 0.15 to 0.30 mm), and at least the joint surface with the body and the inner surface forming the container are made of polypropylene or Polyester is laminated.
  • the lid must have a plastic film of the same type as the fuselage attached to the inner surface that comes into contact with the fuselage. If the plastic material constituting the fuselage is PP, the PP film is Is laminated with PET film. The outer surface of the lid may be laminated with the same plastic film as the inner surface or coated with paint for prevention. Preferred constitutions include PP / modified PP / metal / modified PP / PP, PET / adhesive layer / metal / adhesive layer / PET, PET / metal / PET. The thickness of the film of the laminate layer is from 10 to 200 zm, preferably from 20 to 70 m.
  • the laminated metal plate made in this way is added to a normal metal lid by a mold.
  • the flange formed on the entire circumference of the metal lid is heat-welded with the flange of the fuselage in the case of high-frequency heating only, so the flange shape of the fuselage is the same as that of the fuselage. Is preferably a flat shape.
  • the flange width is more stable because it is heat-welded to the fuselage, but if it is too wide the appearance will be poor and if it is too narrow the stability of the heat welding will be poor.
  • the flange width is usually lmm to 10mm, preferably 2mm to 7mm.
  • a shape suitable for normal double winding may be used.
  • score-line is cut in the metal part so as not to damage the laminated PP or PET film, and a pull tab is attached to make a partial open or full open lid I can do it.
  • Fig. 2 shows an example of the lid.
  • This lid portion is formed of a lid body 11 and a flange portion 13 formed on the entire periphery of the lid body 11.
  • the lid main body 11 has a circular top plate portion 12, and a score line 16 is formed on the entire outer circumference of the top plate portion 12. Further, on one side of the top plate section 12, a pull-up pad 15 for opening is provided.
  • the above-mentioned flange width is a portion indicated by reference numeral 14 in FIG. 2, that is, a heat-welded portion to the body. (body)
  • the fuselage is welded to the lid and these joints are formed on the inner surface of the fuselage, at least the joints on the inner surface of the fuselage are made of the same type of plastic material as the film bonded to the lid. It is necessary. If the film laminated on the lid is PP, a body made of PP material is used, and if the film laminated on the lid is PET, the PET material is used. Is used.
  • the fuselage may be a single layer of a plastic material or a multi-layer substrate combined with a barrier substrate that is impermeable to oxygen and water vapor.
  • a single layer if the plastic film laminated on the lid is PP, an injection-molded product of PP, a vacuum-pressure molded product, or a blow-molded product is used.
  • an injection molded product of PET, a vacuum-pressure molded product, or a biaxially stretched molded product is used.
  • the lid and the body can be used as a pressure-resistant container for carbonated beverages, beer, etc. by forming a pressure-resistant structure respectively.
  • the fuselage has a multilayer structure
  • the same type of plastic as the film laminated on the lid is used on the inner side of the container that comes into contact with the lid because it is bonded and bonded to the lid. It is necessary.
  • the film laminated on the lid is PP, use PP; if PET, use PET.
  • a body for a two-piece can obtained by squeezing a laminated metal plate similar to the lid portion or a body for a three-piece can obtained by welding is used.
  • a laminate film of PP / barrier base material / PP or PET / barrier base material / PET is inserted into an injection mold, and a multi-layered body is made by insert molding.
  • a multi-layered body may be made by vacuum / pressure forming a sheet having a PP / barrier single base / PP or a PET / barrier single base / PET configuration.
  • the barrier base material is made of E VOH, P VDC, PAN, or NY resin, which can follow the elongation of body forming by vacuum pressure forming.
  • a body having a PP / barrier-substrate / PP configuration may be formed by blow molding.
  • a parison having a PET / barrier base material / PET configuration is made, and the parison is set in a blow mold and blow-molded, thereby producing a biaxially stretched product.
  • a combination of a laminated metal lid and a laminated metal barrel, or a PET laminated metal lid and a biaxially stretched product can be used as a pressure-resistant container for carbonated beverages and beer by forming the lid and the body in a pressure-resistant structure. Since the fuselage only welds to the lid, it must have a shape that matches the flange of the lid.
  • the flange width is also limited by the flange width of the lid when only high-frequency heating is used, and a width 1 mm narrower than the flange width of the lid is usually preferable.
  • a width 1 mm narrower than the flange width of the lid is usually preferable.
  • Figure 4 shows an example of the fuselage. Examples of the flange portion 20a of the body 20 shown in FIG. 4 are shown in FIGS. 5 and 6 in an enlarged manner.
  • the body 20 has a main body 2Ob, and a flange 20a formed so as to protrude outward around the entire outer peripheral portion which is an opening end face of the main body 20b. .
  • the body 20 is a two-bead can obtained by drawing the same laminated metal plate as the lid, and as shown in an enlarged view in FIG. And PP 23 are laminated.
  • the flange portion 2 Ob may have a configuration as shown in FIG. 5 or a configuration as shown in FIG. In the example of the flange portion shown in FIG. 6, the tip portion is wrapped inward to prevent the iron plate from flowing out of the flange end surface.
  • Means for applying heat include radiant heating, hot plate heating, ultrasonic heating, and high frequency heating.
  • high-frequency heating is optimal because it induces heat in the lid metal plate by means of a high-frequency magnetic field, so that heat can be directly transmitted to the laminated plastic in contact with the body.
  • Welding of the lid and fuselage is performed as follows. That is, the metal plate is heated by the Joule loss of the eddy current generated in the metal plate of the lid, and the laminated plastic and the same kind of plastic as the body are melted. Welding. Example
  • Nominal diameter using a laminated metal plate composed of PP (48 JL) / modified PP (2 ⁇ ⁇ ) Z iron plate (200 ⁇ .) / Modified PP (2 ⁇ ) / PP (28 ⁇ ) was produced.
  • the width of the flange was 5 mm, and the score was lined up and a pull tab was attached to form a fully open lid.
  • the body and bottom lid are formed from an iron plate with a thickness of 0.23 mm and the inside of which is coated with epoxy phenol, which is used for ordinary metal cans, and these are double-wound using a compound.
  • a container body which was filled with 250 ml of distilled water.
  • a container was formed by double-tightening a full-open lid of epoxy phenol inner surface coating on the A1 plate via a compound to form a container, which was used as a comparative sample. This was stored in a retort pot and subjected to hot water retort sterilization at 125 ° C for 40 minutes. F at this time. The value was 40.
  • Distilled water after retort was evaporated to dryness at the mouth of the evaporator and dried to dryness at 105 ° C for 4 hours.
  • the residue obtained was converted to the unit of mg / m 2 from the surface area of the container.
  • Table 1 shows that there is a significant difference between the 1% risk factor and the 5% risk factor for each item, indicating that the product of the present invention has little transfer of off-flavor and odor to distilled water. It can be seen that an unusual flavor is occurring.
  • Table 2 shows that the magnitude of the absorbance is a measure of the size of the organic matter eluted in distilled water, indicating how much of the eluted material has dissolved in the conventional metal can. From Table-3, the amount eluted was confirmed as an actual residue. Again, it can be seen that a large amount of eluted material has been dissolved in the conventional metal can.
  • Table 4 shows a summary of what kind of eluate was found.
  • the eluate from conventional metal cans is mainly bisphenol A, which is said to be an environmental hormone, which is not desirable for food safety and health.
  • a metal lid with a nominal diameter of # 211 was manufactured using a laminated metal plate with a PET (30) / iron plate (200 /) / ⁇ ⁇ (30) configuration from the inner side as a lid.
  • a single-layer bottle of biaxially-stretched PET with a diameter of 80 mm and a height of 120 mm was prepared as the body, with the shape of a metal lid for tightening and a scored line and a pull tab attached to form a partial open lid.
  • the shape was adapted to the shape of the metal cover for tightening, and the bottom was a pressure-resistant structure of inverted dome type.
  • This body was filled with water, the above-mentioned lid was fitted, and lightly tightened with a seamer for metal cans.Then, the lid and the body were welded with a high-frequency heating welding machine, as shown in Fig. 3.
  • a sample having a joint was prepared. A hole was made in the lid of this sample, and water was injected with a water pressure pump to check the joint strength between the lid and the body. However, even at a water pressure of 1 O kg / cm 2 , the joint did not peel off.
  • a metal lid laminated with PP or PET is heat-sealed by high-frequency heating to a multi-layer fuselage whose surface is made of the same plastic material as the lid or a single-layer fuselage made of the same plastic material as the lid.
  • Bisphenol A which is called an environmental hormone
  • Residual organic compounds from the compound are not used because double-tightening compound is not used.
  • a container preferable for food safety and hygiene can be provided. When joining is performed by using both high-frequency heating and double winding, the most stable joint without pinholes and slow leaks is formed, following the deformation of the flange when falling. . Also as a torso,
  • a pressure-resistant body such as a biaxially stretched bottle
  • a container for carbonated beverages can be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)

Abstract

L'invention concerne un récipient composite sous pression qui peut être utilisé comme boite à denrées ou boite-boisson, ce récipient pouvant être fabriqué sans utiliser de substances nocives pour l'environnement. Ce récipient comprend un couvercle métallique formé à partir d'une tôle métallique dont le coté intérieur est revêtu de polypropylène ou de polyester, et un corps dont la surface intérieure est à base de polypropylène ou de polyester, ce corps et ce couvercle étant reliés l'un à l'autre par soudage par haute fréquence.
PCT/JP1999/003312 1998-06-26 1999-06-21 Recipient composite WO2000000400A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99925409A EP1033315A1 (fr) 1998-06-26 1999-06-21 Recipient composite

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP18040598A JP2000006978A (ja) 1998-06-26 1998-06-26 複合容器
JP10/180405 1998-06-26

Publications (1)

Publication Number Publication Date
WO2000000400A1 true WO2000000400A1 (fr) 2000-01-06

Family

ID=16082678

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/003312 WO2000000400A1 (fr) 1998-06-26 1999-06-21 Recipient composite

Country Status (3)

Country Link
EP (1) EP1033315A1 (fr)
JP (1) JP2000006978A (fr)
WO (1) WO2000000400A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002249131A (ja) * 2001-02-21 2002-09-03 Daiwa Can Co Ltd 有機樹脂被覆絞り缶
DE10349744B3 (de) * 2003-10-23 2005-04-14 Gisela Rinderspacher Verpackung für Lebensmittel
JP4558374B2 (ja) 2004-05-11 2010-10-06 上野製薬株式会社 液晶ポリエステル樹脂組成物の接合方法および液晶ポリエステル樹脂組成物接合体

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882717A (ja) 1981-11-13 1983-05-18 Toyo Kohan Co Ltd ポリエステル樹脂フイルム被覆金属板の製造方法
JPS61149340A (ja) 1984-12-25 1986-07-08 Toyo Kohan Co Ltd ポリエステル樹脂フイルム被覆金属板の製造方法
JPS63111049A (ja) 1986-10-30 1988-05-16 新日本製鐵株式会社 金属−ポリプロピレンフイルム積層体
JPS63111048A (ja) 1986-10-30 1988-05-16 新日本製鐵株式会社 金属−ポリプロピレンフイルム積層体
JPH01254545A (ja) 1988-03-31 1989-10-11 Dainippon Printing Co Ltd 金属蓋付容器
JPH05132061A (ja) * 1991-11-05 1993-05-28 Fujii Yoki Kogyo Kk 熱可塑性樹脂被覆鋼板を使用した金属容器 の製缶方法
JPH06320669A (ja) 1990-12-26 1994-11-22 Toyo Kohan Co Ltd 薄肉化深絞り缶用樹脂被覆金属板
JPH0790094A (ja) 1993-09-21 1995-04-04 Toray Ind Inc 金属板ラミネート用ポリエステルフィルム
JPH07331196A (ja) 1994-06-13 1995-12-19 Toyobo Co Ltd 金属ラミネート用ポリエステル複合フィルムおよび該フィルムをラミネートしたラミネート金属板または金属容器

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882717A (ja) 1981-11-13 1983-05-18 Toyo Kohan Co Ltd ポリエステル樹脂フイルム被覆金属板の製造方法
JPS61149340A (ja) 1984-12-25 1986-07-08 Toyo Kohan Co Ltd ポリエステル樹脂フイルム被覆金属板の製造方法
JPS63111049A (ja) 1986-10-30 1988-05-16 新日本製鐵株式会社 金属−ポリプロピレンフイルム積層体
JPS63111048A (ja) 1986-10-30 1988-05-16 新日本製鐵株式会社 金属−ポリプロピレンフイルム積層体
JPH01254545A (ja) 1988-03-31 1989-10-11 Dainippon Printing Co Ltd 金属蓋付容器
JPH06320669A (ja) 1990-12-26 1994-11-22 Toyo Kohan Co Ltd 薄肉化深絞り缶用樹脂被覆金属板
JPH05132061A (ja) * 1991-11-05 1993-05-28 Fujii Yoki Kogyo Kk 熱可塑性樹脂被覆鋼板を使用した金属容器 の製缶方法
JPH0790094A (ja) 1993-09-21 1995-04-04 Toray Ind Inc 金属板ラミネート用ポリエステルフィルム
JPH07331196A (ja) 1994-06-13 1995-12-19 Toyobo Co Ltd 金属ラミネート用ポリエステル複合フィルムおよび該フィルムをラミネートしたラミネート金属板または金属容器

Also Published As

Publication number Publication date
JP2000006978A (ja) 2000-01-11
EP1033315A1 (fr) 2000-09-06

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