EP0745046B1 - Procede de fermeture auto-etancheifiant de recipients - Google Patents

Procede de fermeture auto-etancheifiant de recipients Download PDF

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Publication number
EP0745046B1
EP0745046B1 EP95908907A EP95908907A EP0745046B1 EP 0745046 B1 EP0745046 B1 EP 0745046B1 EP 95908907 A EP95908907 A EP 95908907A EP 95908907 A EP95908907 A EP 95908907A EP 0745046 B1 EP0745046 B1 EP 0745046B1
Authority
EP
European Patent Office
Prior art keywords
container
film
plastic
hot melt
plastic disk
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP95908907A
Other languages
German (de)
English (en)
Other versions
EP0745046A1 (fr
Inventor
Christoph Lohr
Michael Krebs
Robert Magunia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henkel AG and Co KGaA
Original Assignee
Henkel AG and Co KGaA
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 Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Publication of EP0745046A1 publication Critical patent/EP0745046A1/fr
Application granted granted Critical
Publication of EP0745046B1 publication Critical patent/EP0745046B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B63/00—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged
    • B65B63/08—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for heating or cooling articles or materials to facilitate packaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • 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
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • B65D81/245—Internal membrane, floating cover or the like isolating the contents from the ambient atmosphere
    • 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
    • B65D2251/0018—Upper closure of the 43-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
    • B65D2251/0081—Lower closure of the 43-type

Definitions

  • the invention relates to a method for self-sealing sealing of hobbocks and barrels, which are suitable for meltable masses, especially for moisture-reactive polyurethane hotmelts Advantage can be used.
  • Moisture-reactive polyurethane hotmelts are designed so that they already react with traces of moisture and cross-linked, no longer meltable polymers result. When bottling and storage of such polyurethane hotmelts are therefore very high Make moisture exclusion requirements, as below illustrated.
  • To 1 kg of a polyurethane hot melt with an isocyanate content of 1% with the conversion of all isocyanate groups To harden completely, approx. 1 g of water is required. Skin formation on the surface of the hot melt therefore already occurs instead if only a fraction of this amount of water to the surface of the product.
  • EP-A-102804 describes a cylindrical one Container that is heated in the bottom area and one in the bottom area Removal opening and a movable piston head at the upper end as a conclusion. During the removal of the hot melt adhesive the bottom area is heated, so that only in this area Hot melt adhesive is melted. The printing stamp of a barrel press presses on the movable piston head of the container so that the entire unmelted block of hot melt adhesive is pressed down and so the melted part of the Hot melt adhesive through the discharge opening to the one with the discharge opening associated application part for the hot melt adhesive presses.
  • This solution has two major disadvantages, firstly are special containers with a lower outlet opening necessary, which are complex and therefore expensive, on the other hand it when using amorphous hot melt adhesives Difficulties in the application. While with hot melt adhesives, which are crystalline at room temperature, the strong one when solidified Shrinkage to form a narrow gap between the wall of the Container and the mass of the solid hot melt adhesive composition leads, the amorphous hot melt adhesives shrink in a lot to a lesser extent when solidifying, so that it is often only with these to a very small extent to the said gap formation between the Mass of the hot melt adhesive and the container wall comes. This However, gap formation does not favor the mobility of the melted part of the hot melt adhesive block during the Removal, so that when applying amorphous hot melt adhesives from such containers to considerable difficulties can come.
  • the object was achieved by the characterizing features of the claim 1 solved.
  • Containers, hobbocks or barrels used a meltable mass circular cross section, so that the cover sheet and the Plastic disc are cut in a circle.
  • the invention also relates to a hot melt adhesive packaged by this method according to claim 10.
  • the plastic disc covered with the film is inserted into the container and lightly pressed onto the melting material so that the product rises about 1 to 4 mm in the edge area, the one with the The film-covered side of the disc faces the melting material.
  • the Plastic discs have two important functions: firstly As a centering aid, it facilitates the precise positioning of the Covering film on the melting material, especially in the edge area.
  • the film material must have a high water vapor barrier effect, in addition, it must be thermally so stable that it can high temperatures of the cooling melt are not damaged becomes.
  • multilayer composite films are used for this suitable.
  • two-layer composite films are also used have found films with at least three layers Structure proven to be particularly suitable.
  • the one facing the melt Side of the composite film should have anti-adhesive properties if possible have so that the composite film from the end consumer before Application can be easily removed from the solidified melting material can.
  • This inner layer is therefore preferably the same as the solidified one Hot melt adhesive facing, made of polyethylene, Polytetrafluoroethylene (PTFE) or especially polypropylene.
  • PTFE Polytetrafluoroethylene
  • the middle layer of the three-layer composite film consists of a Aluminum foil as a water vapor barrier.
  • the outside of the composite film the overall composite should have a sufficiently high mechanical strength therefore, polyamide foils or especially preferred polyester films.
  • the suitable according to the invention Composite films must be laminated so that the film composite the high temperature load during the cooling phase of the hot melt adhesive, the films are therefore preferred with a laminating adhesive such as Liofol (RTM, company Henkel) laminated.
  • Plastic panes to be used according to the invention consist of polyvinyl chloride (PVC), polystyrene, polyethylene, polypropylene, polymethyl methacrylate or Polyoxymethylene.
  • PVC polyvinyl chloride
  • polystyrene polystyrene
  • polyethylene polyethylene
  • polypropylene polypropylene
  • polymethyl methacrylate polymethyl methacrylate
  • the linear thermal expansion of the plastic disc is intended to bring about radial pressure on the protruding edge region of the cover film against the inner wall of the container.
  • thermoplastics with a linear expansion coefficient of at least 6x10 -5 / K measured at room temperature are suitable. This coefficient of linear expansion should preferably be even higher at higher temperatures. This is ensured in particular in the case of branched polyethylene or also in the case of polypropylene, so that polyethylene and, in particular, polypropylene are suitable as the material for the plastic pane.
  • the outer dimensions of the plastic disc depend on the container to be sealed.
  • the thickness of the plastic disc is not critical as long as sufficient mechanical stability is guaranteed.
  • the thickness of the disc can be between 0.1 and 5 mm, but the notes preferably have a thickness of 1 to 3 mm.
  • the plastic disc has an inner circular section that shows the handling of the insert when inserting after filling and when removing relieved before removing the hot melt adhesive.
  • the dimensions of the plastic film and the plastic disc depend on the container to be sealed.
  • a three-layer composite film cut into a circle with a diameter of 310 mm used as a plastic film.
  • a polypropylene disc with a plastic disc is used Use diameter of 275 mm and a thickness of 2 mm, whereby the polypropylene disc has an inner circular section of approximately 125 mm.
  • the hot melt adhesive can ensure after filling of the melting material and the sealing with that described above Insert consisting of a foil and a plastic disc be placed on the insert with a molecular sieve.
  • the molecular sieve removes the gas space between the insert and the container lid the residual moisture in it.
  • the Processor through a simple functional test of the molecular sieve Check whether the container was tight by checking it before application moistened the bag with molecular sieve. If the molecular sieve strongly warmed up by this moistening, it had to this At the time still large adsorption capacities for water, so this a sure sign of sufficient tightness of the container is.
  • the processor opens the to apply the hot melt adhesive Hobbock, removes the plastic disc and can remove the sealing film without great effort from the solidified hot melt adhesive pull it off. Because the plastic disc is not dirty , it can be reused for the same purpose.
  • Hot melt adhesive can now be used with any conventional barrel press can be removed with a heated follower plate.
  • the container can be left down to very small quantities empty completely so that usually recycling or disposal of the container is not a problem.
  • This can be further facilitated by the fact that the container bottom also before filling with the polyurethane hot melt adhesive is covered with a suitable composite film blank. After Discharge of the hot melt can be the little remaining in the floor area The rest of the hot melt adhesive can be easily removed after cooling, so that the container in the bottom area is bare metal and accordingly is easy to reuse or dispose of.
  • the application of the sealing method according to the invention is not limited to use with reactive hot melt adhesives, other meltable masses that are protected from moisture, Air access or even pollution are safely protected can be sealed in containers in this way, provided they can only be filled at sufficiently high temperatures.
  • the surface temperature of the mass to be sealed should at least 50 ° C, preferably 80 ° C, so that the plastic disc due to their thermal expansion a sufficiently large one Contact pressure is generated on the film in the edge area. If it is the masses to be sealed are not hot melt adhesives, the edge area of the film that seals / glues to the inside wall of the container should be, preferably with a heat sealable coating, e.g. a hot melt adhesive coated be. In this way, even with these masses reliable sealing / bonding in the edge area guaranteed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Packages (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Closing Of Containers (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Claims (10)

  1. Procédé de remplissage et de fermeture autoétanchéifiant de récipients remplis d'une masse fondue (6), caractérisé en ce que la surface de la masse fondue se trouvant encore à température élevée après le remplissage est recouverte d'une pièce d'insertion, constituée d'un film en matière plastique (1) et d'un disque en matière plastique (2), le film en matière plastique (1) faisant face à la masse et étant plus grand que le diamètre intérieur du récipient (5), le diamètre du disque en matière plastique (2) étant un peu plus petit que le diamètre intérieur du récipient, la dilatation thermique linéaire du disque en matière plastique exerçant une pression radiale contre la paroi intérieure du récipient sur la partie du film relevée verticalement vers le haut.
  2. Procédé suivant la revendication 1, caractérisé en ce que le film en matière plastique (1) est un film composite comportant au moins deux couches et en ce que le disque en matière plastique (2) est constitué d'une matière plastique ayant un coefficient de dilatation thermique linéaire au moins égal a 6.10-5/K.
  3. Procédé suivant la revendication 2, caractérisé en ce que le film en matière plastique (1) est un film composite comportant trois couches avec un film en polypropylène, en polyéthylène ou en PTFE comme couche intérieure, un film d'aluminium comme pare-vapeur et un film de polyester ou de polyamide comme couche extérieure.
  4. Procédé suivant la revendication 2, caractérisé en ce que le disque en matière plastique (2) est fabriqué en PVC, polystyrène, polyéthylène, polypropylène, polyméthylméthacrylate ou polyoxyméthylène et a une épaisseur de 0,1 à 5 mm, de préférence une épaisseur de 1 à 3 mm.
  5. Procédé suivant l'une au moins des revendications 1 à 4, caractérisé en ce que le disque en matière plastique (2) possède une découpe intérieure (3), de préférence circulaire.
  6. Procédé suivant l'une au moins des revendications 1 à 5, caractérisé en ce que la masse à étancher (6) a une température d'au moins 80°C au moment du recouvrement.
  7. Procédé suivant l'une au moins des revendications 1 à 6, caractérisé en ce que, après le scellement de la masse fusible (6), on place un sachet contenant un tamis moléculaire (8) pour absorber l'eau sur la pièce à insérer et en ce que récipient est ensuite fermé à l'aide d'un couvercle (9).
  8. Procédé suivant l'une au moins des revendications 1 à 7, caractérisé en ce que la pièce à insérer est pressée sur la surface encore chaude de la masse fusible (6) de telle façon que la masse remonte d'environ 1 à 4 mm à la partie périphérique.
  9. Procédé suivant l'une au moins des revendications 1 à 8, caractérisé en ce que, après le refroidissement de la masse fusible (6) jusqu'à la température ambiante, on enlève le disque en matière plastique (2) et on ferme ensuite le récipient avec un couvercle (9).
  10. Colle à fusion emballée, caractérisée en ce que l'emballage est constitué d'un récipient (5) ainsi que d'un film en matière plastique (1), dont le diamètre est supérieur au diamètre intérieur du récipient, et d'un disque en matière plastique (2), dont le diamètre est un peu plus petit que le diamètre intérieur du récipient, le récipient ayant été rempli et étanché suivant un procédé conforme à au moins une des revendications 1 à 8.
EP95908907A 1994-02-14 1995-02-06 Procede de fermeture auto-etancheifiant de recipients Expired - Lifetime EP0745046B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4404631 1994-02-14
DE4404631A DE4404631A1 (de) 1994-02-14 1994-02-14 Verfahren zur selbstdichtenden Versiegelung von Behältern
PCT/EP1995/000415 WO1995021767A1 (fr) 1994-02-14 1995-02-06 Procede de fermeture auto-etancheifiant de recipients

Publications (2)

Publication Number Publication Date
EP0745046A1 EP0745046A1 (fr) 1996-12-04
EP0745046B1 true EP0745046B1 (fr) 1999-06-02

Family

ID=6510196

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95908907A Expired - Lifetime EP0745046B1 (fr) 1994-02-14 1995-02-06 Procede de fermeture auto-etancheifiant de recipients

Country Status (8)

Country Link
US (1) US5802815A (fr)
EP (1) EP0745046B1 (fr)
AT (1) ATE180727T1 (fr)
CA (1) CA2183369A1 (fr)
DE (2) DE4404631A1 (fr)
DK (1) DK0745046T3 (fr)
ES (1) ES2134440T3 (fr)
WO (1) WO1995021767A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19952089C1 (de) 1999-10-29 2001-04-05 Henkel Kgaa Verwendung von thermoplastischen Polymerzusammensetzungen als Trockenmittel
FR2875794B1 (fr) * 2004-09-30 2008-02-29 Bernard Bougon Dispositif de fermeture etanche pour conteneur
US10029836B2 (en) * 2015-07-31 2018-07-24 Purina Animal Nutrition Llc Animal feed covers and systems and methods for their production and use
CN107901248A (zh) * 2017-11-09 2018-04-13 中南大学 一种孔槽岩石试样加工装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3545643A (en) * 1967-10-18 1970-12-08 Exxon Research Engineering Co Package for highly viscous tacky materials
US3648882A (en) * 1970-03-02 1972-03-14 Exxon Research Engineering Co Package for highly viscous tacky materials
US4077178A (en) * 1975-04-18 1978-03-07 The Nelson Company Easily perforatable container to facilitate dispensing of contents
ZA836215B (en) * 1982-08-27 1984-07-25 Bostik Ltd Package and dispenser
FR2610593B1 (fr) * 1987-02-05 1989-09-15 Eberle Jean Marie Procede de fabrication et de mise en place simultanee d'un fond ou d'un couvercle sur le corps d'un emballage tubulaire en materiaux composites, emballage ainsi obtenu et moyens pour la mise en oeuvre de ce procede
US4807746A (en) * 1987-07-31 1989-02-28 Jacobs William A Pre-mixed thermoplastic units and method of using same
US5042228A (en) * 1988-07-08 1991-08-27 Minnesota Mining And Manufacturing Company Method and combination for heating and dispensing hot melt materials
GB8819233D0 (en) * 1988-08-12 1988-09-14 Bostik Ltd Container of solid composition for use as hot-melt
US4867312A (en) * 1988-10-17 1989-09-19 Norton Company Container sealing means for air and moisture sensitive materials
WO1992002348A1 (fr) * 1990-08-01 1992-02-20 H.B. Fuller Licensing And Financing Inc. Procede de conditionnement d'une composition adhesive et article conditionne correspondant
US5373682A (en) * 1992-05-18 1994-12-20 National Starch And Chemical Investment Holding Corporation Method for tackless packaging of hot melt adhesives
US5333439A (en) * 1992-09-22 1994-08-02 Croda Apex Adhesives, Inc. Hot-melt pressure sensitive adhesive packaging, preform, and method

Also Published As

Publication number Publication date
US5802815A (en) 1998-09-08
EP0745046A1 (fr) 1996-12-04
DK0745046T3 (da) 1999-11-29
ATE180727T1 (de) 1999-06-15
ES2134440T3 (es) 1999-10-01
CA2183369A1 (fr) 1995-08-17
DE4404631A1 (de) 1995-08-24
WO1995021767A1 (fr) 1995-08-17
DE59506104D1 (de) 1999-07-08

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