EP0233414A1 - Bouchon plastique revêtu - Google Patents
Bouchon plastique revêtu Download PDFInfo
- Publication number
- EP0233414A1 EP0233414A1 EP86310133A EP86310133A EP0233414A1 EP 0233414 A1 EP0233414 A1 EP 0233414A1 EP 86310133 A EP86310133 A EP 86310133A EP 86310133 A EP86310133 A EP 86310133A EP 0233414 A1 EP0233414 A1 EP 0233414A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cap
- coating
- polymer
- vapour
- polymers
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
-
- 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
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0209—Multistage baking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0263—After-treatment with IR heaters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
- B05D3/0413—Heating with air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/08—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by flames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/14—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by electrical means
- B05D3/141—Plasma treatment
- B05D3/142—Pretreatment
- B05D3/144—Pretreatment of polymeric substrates
Definitions
- Containers such as jars and bottles for containing foodstuffs have, in the past, often been provided with metal caps of various types, such as screw caps, lug caps or crimp - on caps.
- Such caps are impermeable to oxygen, water vapor and other small molecules, and thus provide a good barrier between the foodstuffs and the atmosphere. This prevents ingress of oxygen and/or water vapour to protect the ingredients from becoming spoiled and egress of aromas from the foodstuffs, both of which otherwise lead to rapid deterioration of many foodstuffs.
- Metal caps are however being replaced by plastic caps which are cheaper, aesthetically more appealing and inert to attack from ingredients in the foodstuffs.
- Plastic caps any be formed from any suitable material generally polyethylene, polypropylene, ethylene-propylene copolymer or polystyrene or mixtures of these. However these plastics are permeable to oxygen and, to some extent, water vapour. In the absence of an impermeable seal, the shelf life of the product before opening and after opening could be seriously reduced.
- the primary seal seals the container during storage and usually comprises a sheet of aluminium foil or other impermeable material stretched across the top of the container and sealed by an adhesive.
- the primary seal is broken when the container is first used by the consumer and cannot be reformed thereafter.
- the secondary seal after opening is provided by a laminated insert.
- the system of seals is generally provided by forming a laminate including the insert and the primary seal material, connected together by a weak adhesive, and then adhering the whole laminate to the top of the container after applying the cap.
- a cap comprises a vapour permeable body and has a coating of a vapour impermeable material which has been applied to the cap as a liquid and then cured to form a solid and which comprises a polymer and is permanently adhered to the cap.
- the vapour to which the uncoated cap is initially permeable, but to which it is impermeable due to the presence of the coating may be water vapour and is preferably oxygen.
- the body of the cap comprises a plastic material such as is generally used to make caps of this type.
- the material comprises polyethylene, polypropylene, ethylene-propylene copolymers polystyrene or mixtures of these. Such materials are permeable to oxygen and/or water-vapour.
- the coating may be on the inside and/or the outside of the cap. Preferably it is on the inside only of the cap, since it is less likely to be damaged during manufacture and use. It may cover the whole area of the cap, for example, the top surface and the side walls, but usually covers all or part of the top surface only. The proportion of the top surface that is covered should be sufficient to give the desired decrease in oxygen and/or water-vapour permeability. Since it is usually desirable that the permeability be as low as possible preferably the whole area of the surface is covered. If the coating is on the inside it may be desirable to leave a narrow ring around the edge of the top surface free of the impermeable material, particularly, if a gasket is to be applied in the cap.
- the coating is suitably above 1 micron thick but generally needs to be no thicker than 100 microns. Preferably it is between 5 and 50 microns thick, more preferably between 5 and 15 microns thick.
- the impermeable material generally comprises polymers known to be good barriers to oxygen and/or water vapour. Suitable polymers generally have halogen and/or hydroxy groups in the molecules, since these generally have good barrier properties. Suitable polymers include polymers and copolymers of vinylidene chloride, vinyl chloride, vinyl alcohol and acrylates, and epoxy-phenolic resins, cellulose esters, polyurethanes and mixtures of these polymers. The preferred polymers are copolymers of vinyl chloride and vinylidene chloride and the most preferred polymer is polyvinylidene chloride, which gives very low permeability.
- the barrier polymer has an oxygen permeability of less than 100 (m3.m)/(m2.d.PPa) at 23°C, 100% r.h., more preferably less than 50 and most preferably less than 20 or even less than 5.
- polyvinylidene chloride has an oxygen permeability of 0.4 and vinylchloride polymers have oxygen permeabilities in the range 31 to 59, depending on the formulation.
- Vinyl chloride-vinylidene chloride copolymers have permeability between the values of the homopolymers, depending upon the relative amounts of monomers and the formulation.
- the coating is sufficient to reduce the permeability of the cap to less than 50%, perferably less than 20% and most preferably less than 10% of the caps permeability without the coating.
- a 63mm cap of polypropylene typically has a permeability of 0.08 cc oxygen transmission per day (measured when the container sealed by the cap is filled with nitrogen and surrounded by oxygen, both at atmospheric pressure).
- the oxygen transmission of such a cap is preferably reduced to below 0.04, preferably below 0.01, cc O2 per day.
- Preferred caps according to the invention have bodies that are formed of polymers of propylene and/or ethylene, or other permable polymer, have a diameter of about 10 to 100mm, usually 30-100mm a coating of a vapour impermeable material and the coated caps have a permeability of less than 0.03 cc oxygen transmission per day.
- the choice of the optimum impermeable material depends on the contents of the container for which the cap is to be used. The following factors must be taken into consideration, the decrease in permeability required, whether the material is sensitive to moisture or other components of the contents, and whether the material is approved for use with foodstuffs.
- polyvinylalcohol is suitable for dry packs, since it has a low permeability to oxygen.
- Fully hydrolysed polyvinylalcohol is however water sensitive, and so for sealing containers for moisture-containing ingredients, the less sensitive, partially hydrolysed polyvinylalcohol may be used.
- incompletely hydrolysed polyvinylacetate known commercially as partially hydrolysed polyvinylalcohol
- up to about 30% of the acetate groups from the original polyvinylacetate remain in the polymer.
- the most preferred polymer is, as mentioned above, a homo polymer or copolymer of vinylidene chloride, for example a copolymer with vinyl chloride.
- the impermeable coating may comprise in addition to the barrier polymer or polymers, other components such as adhesion promoters, filler, diluent and viscosity modifiers.
- the coating composition contains filler comprising particles having a plate-like crystal structure, for example talc, mica, flake glass and flake metal.
- fillers are impermeable and may often form an oriented structure with the crystals lying parallel to the surface of the cap, thereby increasing the length of the path along which the oxygen and/or water molecules would have to travel to permeate through the coating.
- Adhesion promoters may be included in the coating since the materials from which caps are commonly made resist adhesion to most other substances. Suitable adhesion promoters are for instance oxidised or carboxylated polyolefines, such as oxidised polyethylene and other known materials.
- the liquid coating composition may be applied by conventional techniques such as curtain coating, pad application, rollercoating, printing or, preferably, by spraying.
- the coating should be substantially free of pinholes, since these would allow the passage of oxygen and/or water vapour.
- This problem may be reduced by, for instance, spinning the cap whilst the coating is still liquid, spreading the coating after application, or by applying a second coating over the first.
- a second coating is usually applied when the first coating is partially or completely dry. It may comprise a different composition. For example one layer may be particularly oxygen impermeable and the other may be particularly impermeable to water vapour but it is more convenient from a manufacturing point of view if both layers comprise the same composition.
- a cap should contain a gasket to provide a good hermetic and liquid seal between the cap and the top of the container.
- This gasket may be of a conventional type used in plastic caps and may be provided by a process as described in our patent publication number GB 2051660B.
- the impermeable coating may be provided on top of the gasket, but preferably the gasket is provided over the coating, where the coating is on the inside of the cap. The coating may in this case not extend to the edge of the cap so that an overlying gasket will be in contact with the material of the cap body as well as with the coating.
- a separate adhesive layer between the coating and the cap body may be desirable to provide a separate adhesive layer between the coating and the cap body to improve the adhesion.
- This may be formed of a known adhesion promoter, for example comprising oxidised or carboxylated polyolefine, preferably oxidised polyethylene.
- the cap material may be surface treated before application of the coating for example by oxidising the surface using a corona discharge or flaming.
- the new caps are made by coating a permeable cap with a liquid composition capable of forming the impermeable barrier coating, and the liquid is cured to form a solid.
- Curing in the context of this specification, includes drying, solidification of melts, gelling and chemical modification, e.g., cross linking.
- the liquid composition may be water based, for example it may be a latex of a water-insoluble polymer or an aqueous solution of a water-soluble polymer.
- Suitable latices comprise for instance polymers and copolymers, of vinylidene chloride or acrylate polymers such as methylmethacrylate polymers.
- the composition may comprise viscosity modifying agents, generally thickening agents for example in amount in the range 0 to 5% based on the solids content of the latex.
- a suitable thickening agent for a polyvinylidene chloride latex which is acidic is polyvinylpyrollidone.
- Methylmethacrylate latices generally have an alkaline pH and suitable thickening agents stable in such conditions, include most water soluble thickening agents such as natural polymers or their derivatives, e.g, alginates, and synthetic polymers such as water soluble acrylates.
- the liquid composition has a total solids content in the range 20 to 80%, preferably 40 to 60%, of which 50 to 100% is polymer and up to 50% is filler.
- Completely or partially hydrolysed polyvinylacetate may be applied as an aqueous solution which may also comprise adhesion promoters, fillers and viscosity modifiers.
- the solution generally has a polymer content 50 to 100% is polymer and up to 50% is filler.
- the polymer may suitably be cross linked after application to improve its physical properties, for example during drying of the coating, for example with conventional cross linking reagents.
- the cross-linking reagent is selected from low toxicity agents such as amino resins.
- Polyvinylalcohol coatings are most suitable for dry packs since their permeability increases on exposure to moisture.
- Aqueous-based compositions are often preferred to solvent-based compositions since the latter may be hazardous to health during manufacture and use and to the environment and the solvent must be recovered in the manufacturing process which is expensive.
- Solvent based compositions may be preferred in some circumstances, for example where rapid drying is necessary.
- Example are solutions of copolymers of vinyl chloride with vinylidene chloride, for example in ketonic solvents in which they are stable. Such solutions generally have a rather low solids content, for example 5 to about 25%, usually about 15% by weight.
- the solutions may contain fillers, adhesion promoters and viscosity-modifiers.
- Other solvent based compositions are for example epoxy phenolic lacquers and solutions of organic or inorganic esters of cellulose, these solutions optionally containing other components.
- the solvent based compositions may be allowed to dry at about room temperature or may be heated to accelerate the rate of drying. Heating may also cure the polymers, for example by cross linking the polymers by conventional mechanisms. Cross linking improves the properties, especially the mechanical properties, of epoxy phenolic resins.
- the liquid coating compositions may also be provided as hot melt compositions. These are suitable for high molecular weight polymers which are insoluble and which are not degraded by heat. Generally the polymer should have a melting temperature lower than that of the cap material, so that the melt can be applied at a temperature which will not distort the cap. The cap may be heated prior to application of the coating to improve the adhesion of the coating to the cap. In some instances it may be desirable to apply the coating at a temperature greater than that of the melting point of the material of the cap so that the surface of the cap is melted by the coating material which will give even more improved adhesion of the coating to the cap in which case polymers having a melting point greater than that of the material of the cap could be used in the formulation of the coating.
- the hot melt polymer is suitably an ethylene-vinylalcohol copolymer.
- the hot melt composition may comprise an adhesion promoter, such as oxidised or carboxylated polyolefin, and generally a viscosity-modifier, which is usually a viscosity-reducing diluent for example in an amount of 5 to 30% by weight.
- Diluents which are compatible with hot melt ethylene-vinyl alcohol copolymer compositions are for instance polyethylene wax, oxidised or carboxylated polyethylene wax, polyamide resins, polyterpene resins and esters of rosin, hydrogenated rosin or disproportionated rosin.
- compositions may contain filler in an amount of 5 to 50%. They are generally applied at a temperature in the range 80 to 200°C, preferably 100 - 160°C. Hot melt compositions have the advantage that the caps do not have to be passed through an oven after the coating step which saves time and energy.
- compositions which may be suitable for use are curable liquid polymer compositions. Although some of the compositions may not yet be approved for use with food, they are useful for coating the external surface of a cap or the internal surfaces of caps not used with foodstuffs.
- the compositions are generally curable by exposure to radiation, often UV light or electron beam radiation.
- the compositions thus comprise initiators, acceptors and other catalysts for the curing system.
- Many curable composition are known and may for instance comprise monomers or oligomers of urethanes, epoxy resins, unsaturated esters, acrylates etc.
- the compositions suitably comprise adhesion promoters as listed above.
- the cap may be provided with a gasket, for example a flowed-in gasket of the type disclosed in GB2051660B.
- This gasket may be applied before the coating but is preferably applied after the coating.
- the thermal and micro wave energy used to flux the gasket composition is effective to cure the coating composition, for example to volatilise the solvent or to cross link the polymer molecules.
- the surface of the cap body to be coated may be pretreated in the process to improve the adhesion of the coating.
- the surface of a polyolefine body may be surface treated to oxidise some of the polyolefine molecules. Such treatment may be by corona discharge or flaming.
- the new caps are generally screw caps and are of particular use for closing otherwise impermeable containers such as glass jars and bottles. They may also be useful in closing plastic containers, for example formed of polyolefines or polyesters, optionally themselves coated with a water-vapour and/or oxygen impermeable coating.
- the containers are useful in packaging many types of products, for example pharmaceuticals and, especially, foodstuffs.
- the cap may be provided with conventional tamper-evident seals.
- the plastic caps are generally also impermeable to aroma chemical and carbon dioxide and thus may prevent egress of such chemicals so that the content may retain their taste and carbonation for longer than in containers closed by uncoated caps.
- the specific permeability of Daran is quoted as 2.5 ml oxygen per 100 in2 film 1 micron thick per 24 hours at 1 bar pressure difference, measured at 25°C and 65% r.h. (0.39 (m3.m)/(m2.day.PPa)).
- the emulsion has a maximum value for the Brookfield (LVF) viscosity of 30cP (No.1 spindle at 60vpm, 25°C).
- the emulsion was sprayed onto the internal surface of A 63mm diameter polypropylene cap which had previously been washed and dried, so as to give a dry film thickness of approximately 20 microns.
- An infra-red lamp and hot air circulating at 115-120°c were used to dry the film of wet compound.
- Example 1 Into the latex used in example 1 was stirred 300 mesh micronised mica at a concentration of 15 parts by weight per 100 parts of polymer solids, so as to give a smooth dispersion. The composition was applied as in example 1 at a similar rate.
- a copolymer of vinyl chloride and vinylidene chloride (Ixam SGA/1 - Solvay et cie) having a specific oxygen permeability of 2x103 ml per m2 film 1 micron thick per day per atmosphere pressure difference measured at 23°C and 85% r.h. (20(m3.m)/(m2.day.PPa)) was dissolved in methylethyl ketone to give a 15 weight % solution. The solution was applied to a cap as in example 1.
- ethylene-vinyl alcohol copolymer formed from about 80% molar ethylene, and having vicat softening point of 76°c and melting point (measured by differential thermal analysis) of 93°c having a specific oxygen permeability of 5x10 ⁇ 11 ml per cm2 film 1cm thick per second per cm Hg pressure difference measured at 35°C, 0% r.h. (324(m3.m)/(m2.day.PPa)), sold under the trade name Dumilan D219 (Takeda Chemical Industries Ltd.), was applied as a hot melt composition by the same method as example 1.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB858531717A GB8531717D0 (en) | 1985-12-24 | 1985-12-24 | Coated plastics caps |
GB8531717 | 1985-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0233414A1 true EP0233414A1 (fr) | 1987-08-26 |
Family
ID=10590233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86310133A Withdrawn EP0233414A1 (fr) | 1985-12-24 | 1986-12-24 | Bouchon plastique revêtu |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0233414A1 (fr) |
JP (1) | JPS62193959A (fr) |
AU (1) | AU594732B2 (fr) |
BR (1) | BR8606372A (fr) |
GB (1) | GB8531717D0 (fr) |
NZ (1) | NZ218697A (fr) |
PH (1) | PH23927A (fr) |
ZA (1) | ZA869532B (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2631933A1 (fr) * | 1988-05-30 | 1989-12-01 | Astra Plastique | Dispositif de bouchage hermetique |
WO2003086890A1 (fr) | 2002-04-11 | 2003-10-23 | E.I. Du Pont De Nemours And Company | Bouchon etanche en plastique et procede de fabrication |
US20100181315A1 (en) * | 2005-08-01 | 2010-07-22 | Toyo Seikan Kaisha, Ltd. | Oxygen barrier cap with pullring |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ229530A (en) * | 1988-06-29 | 1990-11-27 | Grace W R & Co | Material comprised of ethylene-vinyl alcohol polymer incorporated in a polymeric material to reduce oxygen permeability that is suitable for gaskets of container closures |
JP2001192057A (ja) * | 1999-11-02 | 2001-07-17 | Nihon Yamamura Glass Co Ltd | 合成樹脂製のキャップ |
JP2001322656A (ja) * | 2000-05-15 | 2001-11-20 | Hokkai Can Co Ltd | 合成樹脂製キャップ |
JP4769430B2 (ja) * | 2004-05-27 | 2011-09-07 | 東洋製罐株式会社 | プラスチックキャップ |
JP5085955B2 (ja) * | 2007-02-23 | 2012-11-28 | 日本クラウンコルク株式会社 | ガスバリア性に優れたプラスチックキャップ |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2071522A (en) * | 1980-03-12 | 1981-09-23 | Daimler Benz Ag | Hollow body suitable for receiving diffusible substances coated with resin varnish and a process for its production and its use |
FR2514326A1 (fr) * | 1981-10-13 | 1983-04-15 | Hc Ind | Bouchon composite |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3563936A (en) * | 1968-05-16 | 1971-02-16 | Grace W R & Co | Plastisol composition |
US3607362A (en) * | 1969-05-14 | 1971-09-21 | Continental Can Co | Plastisol gasket composition |
-
1985
- 1985-12-24 GB GB858531717A patent/GB8531717D0/en active Pending
-
1986
- 1986-12-18 ZA ZA869532A patent/ZA869532B/xx unknown
- 1986-12-18 NZ NZ218697A patent/NZ218697A/xx unknown
- 1986-12-22 BR BR8606372A patent/BR8606372A/pt unknown
- 1986-12-23 JP JP61305545A patent/JPS62193959A/ja active Pending
- 1986-12-23 PH PH34657A patent/PH23927A/en unknown
- 1986-12-24 EP EP86310133A patent/EP0233414A1/fr not_active Withdrawn
- 1986-12-24 AU AU66996/86A patent/AU594732B2/en not_active Ceased
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2071522A (en) * | 1980-03-12 | 1981-09-23 | Daimler Benz Ag | Hollow body suitable for receiving diffusible substances coated with resin varnish and a process for its production and its use |
FR2514326A1 (fr) * | 1981-10-13 | 1983-04-15 | Hc Ind | Bouchon composite |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2631933A1 (fr) * | 1988-05-30 | 1989-12-01 | Astra Plastique | Dispositif de bouchage hermetique |
WO2003086890A1 (fr) | 2002-04-11 | 2003-10-23 | E.I. Du Pont De Nemours And Company | Bouchon etanche en plastique et procede de fabrication |
US20100181315A1 (en) * | 2005-08-01 | 2010-07-22 | Toyo Seikan Kaisha, Ltd. | Oxygen barrier cap with pullring |
Also Published As
Publication number | Publication date |
---|---|
ZA869532B (en) | 1987-08-26 |
JPS62193959A (ja) | 1987-08-26 |
PH23927A (en) | 1990-01-23 |
AU594732B2 (en) | 1990-03-15 |
BR8606372A (pt) | 1987-10-13 |
GB8531717D0 (en) | 1986-02-05 |
NZ218697A (en) | 1989-02-24 |
AU6699686A (en) | 1987-06-25 |
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