US3616047A - Bonding propylene polymers to metal surfaces - Google Patents

Bonding propylene polymers to metal surfaces Download PDF

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Publication number
US3616047A
US3616047A US3616047DA US3616047A US 3616047 A US3616047 A US 3616047A US 3616047D A US3616047D A US 3616047DA US 3616047 A US3616047 A US 3616047A
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United States
Prior art keywords
carboxyl modified
modified polypropylene
coating
polypropylene resin
container
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English (en)
Inventor
Alfred W Kehe
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Continental Can Co Inc
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Continental Can Co Inc
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Publication date
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
    • C08J5/124—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives using adhesives based on a macromolecular component
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/5072—Details of hand grip, tear- or lift-tab
    • B65D2517/5075—Hand grip with finger opening
    • B65D2517/5081—Hand grip with finger opening the hand grip formed as an annular or U-shaped element
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/12—Polypropene
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31692—Next to addition polymer from unsaturated monomers
    • Y10T428/31696—Including polyene monomers [e.g., butadiene, etc.]

Definitions

  • Dittmann ABSTRACT This disclosure relates to bonding a propylene polymer article, such as a removable closure member for a container, to a metal surface, such as the metal end portion of the container, which contains an opening for removal of the contents of the container.
  • the metal surface is first coated with a thermosetting enamel coating composition.
  • a heat activatable adhesion promoting layer containing a carboxyl modified polypropylene resin having a particle size of less than 5 microns.
  • the propylene polymer article is heat sealed to the carboxyl modified polypropylene containing coated surface and the resultant assembly is then immediately cooled to ambient temperature.
  • the plastic closure member fabricated from a thermoplastic resin, such as polypropylene, is detachably and sealably secured to the outer periphery of the pour opening in the end panel by bonding with a suitable adhesive.
  • Container end panels used for beverages and the like have been coated with a heat activatable adhesive layer to provide a surface for bonding a plastic closure member to the container end panel to seal the pour opening. In this manner, the plastic closure member is heat sealed to and fixed about the periphery of the opening until a pulling force is applied thereto.
  • a method of improving the bond strength of propylene polymers heat sealed to metal surfaces which comprises first coating the metal surface with a thermosetting enamel coating, followed by coating the enameled surface with heat activatable, adhesion promoting layer containing a carboxyl modified polypropylene resin having a particle size of less than 5 microns, to which is heat sealed the propylene polymer. The heat sealed surface is then immediately cooled to ambient temperature.
  • FIG. 1 is a top plane view of a container having an easy opening structure provided with a propylene polymer closure member.
  • FIG. 2 is an enlarged cross-sectional view taken generally along the lines 2-2 of FIG. 1 showing the propylene polymer closure member secured to the end panel surface in accordance with the present invention.
  • thermosetting resins or mixtures of thermosetting resins conventionally used in the coating art may be employed for enamel HCH1-O C OCHz-CHCII1 wherein x represents the number of molecules condensed.
  • Typical polyfunctional halohydrins are epichlorohydrin, glycerol dichlorohydrin and the like.
  • Typical polyhydric phenols are resorcinol and a 2,2-bis(4-hydroxyphenyl)alkane, the latter resulting from the condensation of phenols with aldehydes and ketones, including formaldehyde, acetaldehyde, propionaldehyde, acetone, methyl ethyl ketone and the like, which result in such compounds as 2,2-bis(4-hydroxyphenyl)propane and the like compounds.
  • These epoxy resins normally contain terminal epoxy groups but may contain terminal epoxy groups and terminal hydroxyl groups.
  • thermosetting enamel coating materials In place of or in admixture with the epoxy resins, any of the well-known class of heat-hardenable phenolic resins produced by condensing a phenolic compound with an aldehydic compound may be employed as thermosetting enamel coating materials.
  • Exemplary phenols suitable for the preparation of phenol/formaldehyde resins include phenol itself, the orthopara, and metacresols, the xylenols, the dihydroxy benzenes, such as resorcinol, and polynuclear phenols, such as the naphthols, and the various alkylated, aralkylated, carboxylated, alkylolated, etc., derivatives of these types, such as oethyl phenol, carvacrol, salicylic acid and the like.
  • Formaldehyde is the aldehydic compound preferred for condensation with the phenolic compound, but in general, any methylene-containing agent, such as formaldehyde, paraformaldehyde, hexamethylene tetramine, acetaldehyde, and the like may be used.
  • Amine-aldehyde resins may also be employed in preparing thermosetting. enamel coatings, either separately or in combination with epoxy and/or phenolic resins.
  • amine-aldehyde resin includes aldehyde condensation products of melamine, urea, aceto-guanamine, or a similar compound.
  • the aldehyde employed is formaldehyde, although useful productscan be made from other aldehydes, such as acetaldehyde, crotonaldehyde, acrolein, benzaldehyde, furfural, and others.
  • Condensation products of melamine or urea are the commonly employed amine-aldehyde resins.
  • the above-described resins or mixtures of these resins are dissolved in suitable solvent systems, such as organic ketones, such as methyl ethyl ketone, methyl isobutyl ketone, isophorone, cyclohexanone, and aromatic hydrocarbons, such as xylene and toluene, and mixtures thereof, to provide a coating solution of the necessary viscosity for application to the metal surfaces.
  • suitable solvent systems such as organic ketones, such as methyl ethyl ketone, methyl isobutyl ketone, isophorone, cyclohexanone, and aromatic hydrocarbons, such as xylene and toluene, and mixtures thereof.
  • thermosetting enamel coating compositions are applied as a liquid solution to the metal surface by any of the conventional methods employed by the coating industry.
  • roller coating is a preferred method as the deposited coating weight is easily and conveniently applied in a single coat.
  • spraying, dipping, and flow coating are useful methods of application.
  • the applied coating after substantial volatile loss of solvent is cured to a hard film by heating the coated substrate at a temperature between about 150 and about 250C for about 1 to 10 minutes.
  • the preferred coating weight for use as an enamel for containers is in the range of about 1 to 5 milligrams of dry coating per square inch of substrate surface.
  • the metal sheet stock, coated with the hardened enamel coating, in accordance with the present invention, is coated with an adhesion promoting layer containing a carboxyl modified polypropylene resin.
  • the carboxyl modified polypropylene which is utilized in the practice of the present invention is prepared by grafting an unsaturated dicarboxylic acid or anhydride onto a polypropylene backbone.
  • Unsaturated dicarboxylic acids or anhydrides which can be employed to prepare the carboxyl modified polypropylene resins of the present invention include maleic, tetrahydrophthalic acid, fumaric acid, itaconic, nadic, methyl nadic and their anhydrides.
  • the amount of unsaturated dicarboxylic acid or anhydride which can be grafted onto the polypropylene ranges from about 0.05 to about l percent by weight based on the total weight of the grafted polymer. It has been found, however, that only small amounts of the acid or anhydride are required to impart adhesion promoting properties to the polymer and generally, the amount of grafted dicarboxylic acid or anhydride ranges from about 0.5 to about 5.0 percent.
  • the modified polymers can be prepared by reacting the unsaturated dicarboxylic acid, or anhydride such as maleic anhydride, with a polypropylene containing active sites which are capable of anchoring the dicarboxylic acid or anhydride thereon. Active centers at which anchoring will occur can readily be induced on the polypropylene in known ways, as for example, by subjecting the polypropylene to the action of high energy ionizing radiations or by contacting the polymer, either as a solid or in solution in a solvent, with a free radical producing material, such as dibenzoyl peroxide, dilauroyl peroxide, dicumyl peroxide, t-butyl perbenzoate and the like.
  • a free radical producing material such as dibenzoyl peroxide, dilauroyl peroxide, dicumyl peroxide, t-butyl perbenzoate and the like.
  • the carboxyl modified polypropylene resin is prepared by reacting maleic anhydridewith a solution of the polypropylene in an organic solvent containing a free radical producing material, such method being described in Belgian Pat. No. 607,269.
  • the polypropylene resin used as a starting material for the preparation of the carboxyl modified polymers can either be the amorphous polymer, otherwise known as atactic polypropylene, or a crystalline polymer, otherwise known as a syndiotactic or isotactic polypropylene.
  • maleic anhydride modified polypropylene amorphous polypropylene is generally preferred as the starting material as the carboxyl modified product is soluble at or dinary temperatures in a variety of common organic solvents and thus, the application of the modified polymer by ordinary solution techniques is possible.
  • Maleic anhydride modified crystalline polypropylene is not soluble in common solvents, except at relatively high temperatures, and therefore is generally applied as a dispersion following which the coating is baked to effect fusion.
  • the particle size of the adhesion promoting carboxyl modified polypropylene layer applied to the enamel metal surface be less than microns and preferably be in a particle size range of OJ to 4 microns. As will hereinafter be illustrated, when the particle size of carboxyl modified polypropylene is substantially above 5 microns, the bond strength between a propylene polymer bonded to a carboxyl modified polypropylene coated surface is substantially reduced.
  • the adhesion promoting carboxyl modified polypropylene resin is generally applied to the enamel coated metal article surface as a dispersion in a high-boiling volatile organic solvent, such as kerosene, in order to achieve satisfactory coalescence of the resin particles.
  • the carboxylated polypropylene is applied to the enamel coated substrate in admixture with a polypropylene resin having approximately the same particle size, i.e., 0.1 to 5 microns.
  • the incorporation of the polypropylene resin in the dispersion improves the flow and viscosity characteristics of the dispersion required in commercial coating methods.
  • the polypropylene resin is incorporated in the dispersion at a weight ratio to the carboxyl modified polypropylene resin in a range from about 85:15 to 99:1.
  • the dispersion containing the carboxyl modified polypropylene resin can be satisfactorily applied at a solids content ranging from about 15 percent to about 25 percent by weight, based on the total weight of the dispersion composition. Generally, a solids content of 18 percent to about 23 percent by weight is preferred.
  • the dispersion containing the adhesion promoting carboxyl modified polypropylene composition can be satisfactorily applied by any of the conventional methods employed by the coating industry. However, for coating of enameled sheet metal used in container fabrication, gravure or direct roller coating are preferred methods, as the desired coating weight is easily and conveniently applied in a single coat. Spraying, dipping and flow coating are also useful methods of applying the coating dispersion.
  • the solvent is volatilized by heating the coated substrate.
  • the substrate is heated at a temperature of about l75 to about 200 C. for about 2 to about 6 minutes to volatilize the solvent.
  • the dry film weight of the bond promoting coating should be in the range of L5 to 3.5 milligrams of dry coating per square inch of enamel coated surface.
  • Propylene polymers which are bonded to the carboxyl modified polypropylene coated metal surface in accordance with the practice of the present invention include polypropylene, and propylene/ethylene copolymers containing about 1 percent to 10 percent ethylene.
  • the propylene polymer is bonded to the carboxyl modified polypropylene coated metal surface by heat sealing at a temperature of about 175 to about 225 C., and preferably at a temperature of 180 to 200 C.
  • Heat sealing may be accomplished by any means known to the art, such as heated bars or wires, induction and RF heating.
  • the assembly is immediately and rapidly cooled or chilled to ambient temperature, as, for example, room temperature, in any suitable manner, as by air cooling, flooding with water, plunging into a water bath, or by any other appropriate procedure that does not disturb the applied propylene polymer.
  • the end assembly 10 is made of metal such as tin plate, tinfree steel or aluminum.
  • the end assembly 10 comprises a central panel 12 having a bead formed adjacent the outer periphery from which there depends a peripheral flange 13.
  • the peripheral flange 13 is curled and double seamed with an outwardly flap flange at the upper end of a container body in the usual manner.
  • the panel 12 in the embodiment is shown with a pour opening 14 through which the contents of the container are poured.
  • the opening 14 may be formed by blanking or the like. It is to be understood that the opening 14 may assume any configuration, and is not limited to the conventional tear drop design shown.
  • thermosetting enamel coating such as an epoxyurea/formaldehyde resin 15.
  • an adhesion promoting layer 16 containing a carboxyl modified polypropylene resin. such as a polypropylene/maleic anhydride graft copolymer.
  • propylene polymer closure member 17 Detachably and sealably secured to the periphery of the opening 14 is propylene polymer closure member 17.
  • propylene polymer closure member 17 has a sealing flap 18 for closing the opening 14. integrally extending from the sealing flap 18 is a pull ring portion 19. The sealing flap 18 of closure member 17 is heat sealed to the coated periphery of the opening 14 at a temperature of 180 to 200 C.
  • the bond that is formed permits the closure member or flap to be separated by the application of a pulling force at the ring portion 19.
  • the pull ring portion 19 is formed with an opening sized to receive the finger of a user.
  • the heat to achieve bonding is preferably applied by RF heating of the metal surface. RF heating is used so as to localize the heat in the peripheral edge portion of the opening 14, thereby to minimize the buckling of the relatively thin metal from which the end is made. In this manner, the sealing closure member 17 is firmly fixed about the peripheral portion of the opening 14 and remains adhered thereto.
  • the end assembly 10 is rapidly cooled to room temperature.
  • EXAMPLE A solution ofa mixture consisting of 85 percent by weight of X0050 inch strip molded from SHELL V521, a propylene/ethylene copolymer having an ethylene content of 4.0 percent, a melt index (D1238) of 0.55, and a density of 0.895 to 0.905 (D1505) was inserted between the carboxyl modified polypropylene coated sides of two 1 inch Xlinch l 0.006 inch strips cut from the coated metal sheet. The assembly was then laminated by heat sealing at a temperature of 240 C. for a 3.5 second dwell time at 20 p.s.i.
  • the laminated assembly was chilled quenched with water to cool the assembly to room temperature.
  • the peel strength of the cooled assembly was then determined.
  • the peel strength of the assembly i.e., a measure of the load required to peel apart the laminate assembly was determined by pulling the outer steel layers of the assembly apart at an angle of 180 to the bond in an lnstron machine at a rate of 0.5 inches per minute.
  • an epoxy resin EPON 1009 available from the Shell Chemical Company
  • 15 percent of a urea/formaldehyde resin BEE- TLE 216-18 available from the American Cyanamid Company, in a volatile solvent was applied to the surface of a chrome plated steel sheet by means of a roller to deposit an enamel coating at a coating weight of 3.5 mg/in of steel surface.
  • the coating was heated for 8 minutes at 213 C. to remove the solvent and to cure the epoxy resin-urea/formaldehyde resin mixture to a hard enamel film.
  • a bond-promoting coating formulation was prepared using a carboxyl modified polypropylene resin admixed with a finely divided unmodified polypropylene resin at a weight ratio of 5:95.
  • the carboxyl modified polypropylene resin was HER- COPRIME PA672 available from Hercules, lnc., which is a maleic anhydride modified polypropylene having an inherent viscosity of about 1.7, a carboxyl content of 0.6 percent to 1 percent, and a particle size range of 0.1 to 3 microns.
  • the polypropylene resin was HERCOTUF PB-681, available from Hercules, 1nc., having a melt index of 6 and a particle size range of from 0.1 to 2 microns.
  • a 20 percent solids dispersion of the carboxyl modified polypropylene-unmodified polypropylene resin mixture in kerosene was applied to the enamel coated surface of the steel.
  • the coated sheet was baked at 180 C. to volatilize the solvent, fuse and coalesce the dispersed particles into a continuous film.
  • a linch l inch By referring to the table, it is at once apparent that the peel strengths of propylene polymers bonded to metal surfaces coated with an adhesion promoting layer containing a carboxyl modified polypropylene resin in accordance with the present invention (Run Nos. 1 and 4) are substantially greater than the peel strengths over the contrasting or control runs (Run Nos. 2, 3, 5 and 6) in which the heat sealed assembly was not cooled immediately after heat sealing or a carboxyl modified polypropylene having a particle size greater than 5 microns was used.
  • a method of preparing a metal article having a propylene polymer article adhered to the surface thereof which comprises the sequential steps of:
  • thermoplastic bond promoting layer containing a carboxyl modified polypropylene resin, said resin being the graft copolymer of polypropylene and an unsaturated dicarboxylic acid or anhydride having a particle size less than 5 microns;

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  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
US3616047D 1969-09-08 1969-09-08 Bonding propylene polymers to metal surfaces Expired - Lifetime US3616047A (en)

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2639290A1 (de) * 1975-09-25 1977-04-07 Continental Can Co Verfahren zum verbinden durch heisssiegeln einer propylenpolymerschicht mit einer metalloberflaeche
US4034132A (en) * 1975-09-25 1977-07-05 The Continental Group, Inc. Propylene polymer adhered to enamel coated metal surface
EP0019394A1 (en) * 1979-05-18 1980-11-26 The Continental Group, Inc. Two-piece container and method of assembling the container halves
DE3101084A1 (de) * 1980-01-16 1982-01-07 The Continental Group, Inc., 10017 New York, N.Y. "verfahren zum aufbringen eines propylenpolymers auf eine lackierte metalloberflaeche sowie lackzusammensetzung zur durchfuehrung des verfahrens"
US4478667A (en) * 1980-01-16 1984-10-23 The Continental Group, Inc. Method for effecting heat seals of controlled detachability between propylene polymers and enamel coated surfaces
DE3732360A1 (de) * 1987-09-25 1989-04-13 Merkel Martin Gmbh Co Kg Verfahren zum verbinden eines polytetrafluoraethylen-koerpers mit einem metallkoerper und dadurch hergestelltes produkt
US5073594A (en) * 1984-12-13 1991-12-17 Morton International, Inc. Modified polypropylene power suspended in film-forming resin
US5093399A (en) * 1984-12-13 1992-03-03 Morton International, Inc. Process for preparing a free-flowing, modified polypropylene powder
US6189744B1 (en) * 1995-12-01 2001-02-20 Carnaudmetalbox (Holdings) Usa Inc. Containers
US6310134B1 (en) * 1998-06-30 2001-10-30 Eastman Chemical Company Adhesion-promoting primer compositions for polyolefin substrates
US20050145630A1 (en) * 2004-01-05 2005-07-07 Sonoco Development, Inc. Easily openable closure for a retortable container having a metal end to which a membrane is sealed
US20050171295A1 (en) * 2002-04-12 2005-08-04 Idemitsu Kosan Co., Ltd. Process for production of modified propylene polymers and modifies propylene polymers produced by the process
US8939695B2 (en) 2011-06-16 2015-01-27 Sonoco Development, Inc. Method for applying a metal end to a container body
US8998027B2 (en) 2011-09-02 2015-04-07 Sonoco Development, Inc. Retort container with thermally fused double-seamed or crimp-seamed metal end
US10131455B2 (en) 2011-10-28 2018-11-20 Sonoco Development, Inc. Apparatus and method for induction sealing of conveyed workpieces
US10399139B2 (en) 2012-04-12 2019-09-03 Sonoco Development, Inc. Method of making a retort container
KR20210006880A (ko) * 2018-03-28 2021-01-19 탑 캡 홀딩 게엠바하 복합 재료로 구성된 캔 리드의 제조 방법
US12005613B2 (en) * 2018-03-28 2024-06-11 Top Cap Holding Gmbh Method of manufacturing a can lid composed of a composite material

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Publication number Priority date Publication date Assignee Title
AU510800B2 (en) * 1975-09-25 1980-07-17 The Continental Group, Inc Propylene polymer adhered to enamel coated metal surface
JPS582825B2 (ja) * 1977-11-17 1983-01-18 日本クラウンコルク株式会社 オレフイン樹脂−金属接着構造物及びその製造方法
AU529334B2 (en) * 1978-07-17 1983-06-02 Toyo Seikan Kaisha Ltd. Laminating plastic film to the surface of metal
FR2442261A1 (fr) * 1978-11-24 1980-06-20 Raffinage Cie Francaise Complexe bicouche, notamment pour la fermeture d'emballages en matiere plastique
JPS5960868U (ja) * 1982-10-14 1984-04-20 株式会社リコー 直流電動機の電機子
JPS5975958A (ja) * 1982-10-26 1984-04-28 Sanyo Kokusaku Pulp Co Ltd ポリプロピレン系樹脂用塗料組成物
US4537327A (en) * 1984-09-13 1985-08-27 Minnesota Mining And Manufacturing Company Tape closure for a can end
GB8724244D0 (en) * 1987-10-15 1987-11-18 Metal Box Plc Producing laminated materials
US5238517A (en) * 1987-10-15 1993-08-24 Cmb Foodcan Plc Production of laminated materials
JP5928424B2 (ja) * 2013-09-18 2016-06-01 トヨタ自動車株式会社 金属部材と樹脂部材との接合方法、冷却器の製造方法、及び冷却器
DE102022106622A1 (de) 2022-03-22 2023-09-28 Top Cap Holding Gmbh Vorrichtung und Verfahren zum Herstellen eines Dosendeckels

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2639290A1 (de) * 1975-09-25 1977-04-07 Continental Can Co Verfahren zum verbinden durch heisssiegeln einer propylenpolymerschicht mit einer metalloberflaeche
US4034132A (en) * 1975-09-25 1977-07-05 The Continental Group, Inc. Propylene polymer adhered to enamel coated metal surface
EP0019394A1 (en) * 1979-05-18 1980-11-26 The Continental Group, Inc. Two-piece container and method of assembling the container halves
DE3101084A1 (de) * 1980-01-16 1982-01-07 The Continental Group, Inc., 10017 New York, N.Y. "verfahren zum aufbringen eines propylenpolymers auf eine lackierte metalloberflaeche sowie lackzusammensetzung zur durchfuehrung des verfahrens"
US4478667A (en) * 1980-01-16 1984-10-23 The Continental Group, Inc. Method for effecting heat seals of controlled detachability between propylene polymers and enamel coated surfaces
US5073594A (en) * 1984-12-13 1991-12-17 Morton International, Inc. Modified polypropylene power suspended in film-forming resin
US5093399A (en) * 1984-12-13 1992-03-03 Morton International, Inc. Process for preparing a free-flowing, modified polypropylene powder
US5218029A (en) * 1984-12-13 1993-06-08 Morton Thiokol Free flowing modified polypropylene powder for prime compositions with film-forming resin solvent
DE3732360A1 (de) * 1987-09-25 1989-04-13 Merkel Martin Gmbh Co Kg Verfahren zum verbinden eines polytetrafluoraethylen-koerpers mit einem metallkoerper und dadurch hergestelltes produkt
US6189744B1 (en) * 1995-12-01 2001-02-20 Carnaudmetalbox (Holdings) Usa Inc. Containers
US6310134B1 (en) * 1998-06-30 2001-10-30 Eastman Chemical Company Adhesion-promoting primer compositions for polyolefin substrates
US7459503B2 (en) * 2002-04-12 2008-12-02 Idemitsu Kosan Co., Ltd. Process for production of modified propylene polymers and modified propylene polymers produced by the process
US20050171295A1 (en) * 2002-04-12 2005-08-04 Idemitsu Kosan Co., Ltd. Process for production of modified propylene polymers and modifies propylene polymers produced by the process
AU2004235675B2 (en) * 2004-01-05 2007-02-01 Sonoco Development, Inc. Easily openable closure for a retortable container having a metal end to which a membrane is sealed
US20050145630A1 (en) * 2004-01-05 2005-07-07 Sonoco Development, Inc. Easily openable closure for a retortable container having a metal end to which a membrane is sealed
US8939695B2 (en) 2011-06-16 2015-01-27 Sonoco Development, Inc. Method for applying a metal end to a container body
US10994888B2 (en) 2011-09-02 2021-05-04 Sonoco Development, Inc. Container with thermally fused double-seamed or crimp-seamed metal end
US8998027B2 (en) 2011-09-02 2015-04-07 Sonoco Development, Inc. Retort container with thermally fused double-seamed or crimp-seamed metal end
US9499299B2 (en) 2011-09-02 2016-11-22 Sonoco Development, Inc. Container with thermally fused double-seamed or crimp-seamed metal end
US9783337B2 (en) 2011-09-02 2017-10-10 Sonoco Development, Inc. Container with thermally fused double-seamed or crimp-seamed metal end
US9988179B2 (en) 2011-09-02 2018-06-05 Sonoco Development, Inc. Container with thermally fused double-seamed or crimp-seamed metal end
US10259612B2 (en) 2011-09-02 2019-04-16 Sonoco Development, Inc. Container with thermally fused double-seamed or crimp-seamed metal end
US10131455B2 (en) 2011-10-28 2018-11-20 Sonoco Development, Inc. Apparatus and method for induction sealing of conveyed workpieces
US10569324B2 (en) 2012-04-12 2020-02-25 Sonoco Development, Inc. Method of making a retort container
US10399139B2 (en) 2012-04-12 2019-09-03 Sonoco Development, Inc. Method of making a retort container
US11040495B2 (en) 2012-04-12 2021-06-22 Sonoco Development, Inc Method of making a retort container
KR20210006880A (ko) * 2018-03-28 2021-01-19 탑 캡 홀딩 게엠바하 복합 재료로 구성된 캔 리드의 제조 방법
US20210046679A1 (en) * 2018-03-28 2021-02-18 Top Cap Holding Gmbh Method of manufacturing a can lid composed of a composite material
AU2019241412B2 (en) * 2018-03-28 2021-08-12 Top Cap Holding Gmbh Method for producing a can lid from a composite material
US12005613B2 (en) * 2018-03-28 2024-06-11 Top Cap Holding Gmbh Method of manufacturing a can lid composed of a composite material

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DE2032928B2 (de) 1977-12-01
CA931913A (en) 1973-08-14
CH523763A (fr) 1972-06-15
ZA701779B (en) 1971-10-27
DE2032928A1 (de) 1971-03-11
BE755748A (nl) 1971-02-15
NL7013011A (xx) 1971-03-10
FR2060644A5 (xx) 1971-06-18
JPS4829301B1 (xx) 1973-09-08
DK128484B (da) 1974-05-13
SE374034B (xx) 1975-02-24
NL166485B (nl) 1981-03-16
DE2032928C3 (de) 1978-08-17
NL166485C (nl) 1981-08-17
GB1257620A (xx) 1971-12-22

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