WO1998009796A1 - Container of stretched plastic material, and process for making such container - Google Patents

Container of stretched plastic material, and process for making such container Download PDF

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Publication number
WO1998009796A1
WO1998009796A1 PCT/NL1996/000345 NL9600345W WO9809796A1 WO 1998009796 A1 WO1998009796 A1 WO 1998009796A1 NL 9600345 W NL9600345 W NL 9600345W WO 9809796 A1 WO9809796 A1 WO 9809796A1
Authority
WO
WIPO (PCT)
Prior art keywords
container body
container
process according
stretched
tube
Prior art date
Application number
PCT/NL1996/000345
Other languages
French (fr)
Inventor
Gerrit Jan Keimpema
Roger Alan Shefford
Original Assignee
Koninklijke Emballage Industrie Van Leer N.V.
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 Koninklijke Emballage Industrie Van Leer N.V. filed Critical Koninklijke Emballage Industrie Van Leer N.V.
Priority to PCT/NL1996/000345 priority Critical patent/WO1998009796A1/en
Priority to AU69470/96A priority patent/AU6947096A/en
Publication of WO1998009796A1 publication Critical patent/WO1998009796A1/en

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
    • B65D11/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material
    • B65D11/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material of curved cross-section
    • B65D11/06—Drums or barrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/22—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes
    • B29C55/26—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes biaxial
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B29C65/2007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by the type of welding mirror
    • B29C65/203—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by the type of welding mirror being several single mirrors, e.g. not mounted on the same tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • 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
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7371—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73711—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7371—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73711—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented
    • B29C66/73713—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable oriented bi-axially or multi-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1412—Infrared [IR] radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • 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
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7371—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73715—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable heat-shrinkable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/005—Oriented
    • B29K2995/0051—Oriented mono-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/005—Oriented
    • B29K2995/0053—Oriented bi-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7154—Barrels, drums, tuns, vats

Definitions

  • Container of stretched plastic material and process for making such container
  • the invention is related to the field of containers, for instance semi bulk drums or containers e.g. in the range of 15 to 300 litres.
  • Such drums can be made of various materials , such as metal , glass or plastics.
  • Plastics have many advantages over competing materials, for example low weight, transparency or translucency for viewing the contents; they are suitable for packaging a wide range of products. Moreover, plastics offer a much greater degree of freedom in shaping the container which leads to more attractive designs and more convenience for the consumer.
  • Plastics materials are very ductile, which means that the risk of accidental breakage is decreased and the security of the contents is increased. Minor denting of the drum recovers immediately, unlike metal containers.
  • Plastics however have the disadvantage of a relatively low rigidity. This means that the wall thickness of a plastic container or drum is always much greater than the wall thickness of an equivalent metal one. This increases the cost of a plastic container, not only due to the greater amount of raw material required but also due to the energy which is necessary for the conversion thereof.
  • the object of the invention is to provide a container with an increased rigidity, strength and impact resistance. Thereby a greater stackability or a lower weight could be obtained, which could make the plastic drums more equivalent to their steel counterparts. Also a reduced absorption by the drum wall of components of the contents of the drum (such as hydrocarbons) is desired, to prevent a further reduction of the useful properties of the drum. Moreover, there should be a reduced permeability of the wall of the drum to gases as well as components of the contents of the drum.
  • the stretched material of the container body has a higher stiffness and strength than the corresponding non-stretched material. Thereby, the resistance of the container body against external loads and buckling is increased appreciably, resulting in better stackability.
  • the end pieces may consist of stretched material.
  • the plastic is stretched into two mutually perpendicular directions; for instance, the container body may consist of a length of biaxially stretched tubular material.
  • the invention is also related to manufacturing of an improved container. According to a first possibility, such process comprises the steps of: -extruding a tube through an annular die;
  • a container which has a thin-walled body with an excellent rigidity and strength. Both features are obtained by biaxially stretching the tube from which the body is made. Manufacturing a bottle from an extruded stretched tube, by cutting said tube in appropriate lengths per se is known from EP-A- 249O.
  • This known process is however not suitable for manufacturing containers such as drums.
  • first of all a length is cut from a piece of tubular material, and subsequently said length is stretched.
  • the disadvantage here is that such process is not continuous but takes place in a batch-wise manner. Thereby, end- effects are generated in the lengths of tubular material, which makes this batch-wise process difficult to control.
  • continuous stretching of the tubular material is preferred; it offers a faster process with a uniform quality and reduced failure rate.
  • the process described before is related to extruding a tube, the invention is not limited to such manufacturing method.
  • the process could also comprise the following steps: - stretching a plate of plastic material,
  • the process for connecting the end(s) to the tube according to the invention may comprise the steps of:
  • Welding the ends to the container body is also possible in several ways, for instance by means of an ultrasonic device, by an infra-red device, or by a vibration device.
  • the end piece may also be connected to the container body by means of glueing.
  • the process may additionally comprise the step of heating the container body at least one of its ends for shrinking the plastic material so as to form an end with a converging shape.
  • proper control mechanisms should be applied for cooling the inside and the outside of the extruded tube, so as to obtain a regular stress distribution over the wall thickness. This can for instance be done according to the process described in EP-A-209933- A uniform temperature distribution is necessary in order to enable the stretching process to be carried out in a proper way.
  • Figure 1 shows a schematic view of biaxially stretching a tube.
  • Figure 2a and b show a first method of welding an end plate to a drum body by means of a hot plate.
  • Figure 3 shows a second method for welding an end plate to a drum body.
  • a tube of stretchable thermoplastic material such as high density polyethylene (HDPE) is extruded through an annular die 13 and is pulled through a cooling bath 14 by a pulling device 15 such as a set of caterpillars which are situated at regular internals around the tubes. It is subsequently reheated by a reheater 12 and pulled over a mandrel 1.
  • the cooling and heating sections have to be adjusted so that the HDPE is in the temperature range of 100°C-13 ⁇ ' > C when it is pulled over the mandrel.
  • the mandrel is held in place by means of a pulling rod 2, which is fixed to the extrusion die 13-
  • the tube 4 is pulled over the mandrel 1 by means of pulling device 16 which may also be a set of caterpillars which are situated at regular intervals around the tube. In this pulling process the tube is stretched in the axial direction. Radial stretching also occurs as the tube 3 is pulled over the mandrel 1.
  • a similarly shaped tube can be made.
  • the biaxially stretched tube 4 thus obtained is cut into pieces of appropriate size by cutting means (not shown) .
  • the pieces 5 thus obtained are to form the drum body of a drum.
  • Figures 2a and 2b show a drum body 5 in question, at one end of which an end piece 6 is situated.
  • a hot plate 7 By means of a hot plate 7. the facing surfaces of drum body 5 and end piece 6 are heated, such that they can be fused together by pressing them onto each other.
  • the end of the drum body 5 is forced over a conical heating ring 8, whereby both a conical end section 9 is obtained, and the inner surface of this end section is molten.
  • the end moulding 10, in particular the outer surface 11 thereof is heated by means of a heating ring 12 until said surface 11 melts.
  • end pieces are welded to the container body, other methods may be applied as well, such as glueing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

A container comprises a tubular container body (5) at the upper and lower ends of which end pieces (6) are connected. At least said container body comprises stretched plastic material. Also, at least one of the end pieces (6) may comprise stretched plastic material. A process for making the container comprising the steps of: extruding a tube (3) through an annular die (13); stretching the tube (3) in its axial and/or circumferential direction; cutting the tube in lengths so as to obtain a container body (5); connecting an end piece (6) to at least one end of each container body.

Description

Container of stretched plastic material, and process for making such container
The invention is related to the field of containers, for instance semi bulk drums or containers e.g. in the range of 15 to 300 litres. Such drums can be made of various materials , such as metal , glass or plastics. Plastics have many advantages over competing materials, for example low weight, transparency or translucency for viewing the contents; they are suitable for packaging a wide range of products. Moreover, plastics offer a much greater degree of freedom in shaping the container which leads to more attractive designs and more convenience for the consumer.
Plastics materials are very ductile, which means that the risk of accidental breakage is decreased and the security of the contents is increased. Minor denting of the drum recovers immediately, unlike metal containers.
Plastics however have the disadvantage of a relatively low rigidity. This means that the wall thickness of a plastic container or drum is always much greater than the wall thickness of an equivalent metal one. This increases the cost of a plastic container, not only due to the greater amount of raw material required but also due to the energy which is necessary for the conversion thereof.
Moreover, the size of such container is increased which leads to a reduction of the number of containers which can be transported or stored in a given vehicle or space. As a result the overall cost of packaging is increased, and also the environmental impact.
These problems are furthermore of particular importance with respect to the stacking capability of the drums. For instance, 200 litre steel drums can be stacked up to 5 metres high. Equivalent drums from high density polyethylene can be stacked up to 3 metres high in spite of a three times greater wall thickness.
Finally, many plastics absorb liquids and vapours, which reduces their strength further. For example, HDPE will absorb hydrocarbon solvents. The object of the invention is to provide a container with an increased rigidity, strength and impact resistance. Thereby a greater stackability or a lower weight could be obtained, which could make the plastic drums more equivalent to their steel counterparts. Also a reduced absorption by the drum wall of components of the contents of the drum (such as hydrocarbons) is desired, to prevent a further reduction of the useful properties of the drum. Moreover, there should be a reduced permeability of the wall of the drum to gases as well as components of the contents of the drum. These objects are achieved in that at least the container body comprises stretched plastic material.
The stretched material of the container body has a higher stiffness and strength than the corresponding non-stretched material. Thereby, the resistance of the container body against external loads and buckling is increased appreciably, resulting in better stackability.
Also, the end pieces may consist of stretched material. Preferably, the plastic is stretched into two mutually perpendicular directions; for instance, the container body may consist of a length of biaxially stretched tubular material.
The invention is also related to manufacturing of an improved container. According to a first possibility, such process comprises the steps of: -extruding a tube through an annular die;
-stretching the tube in its axial and/or circumferential direction;
-cutting the tube in lengths so as to obtain a container body; -connecting an end piece to at least one end of each container body .
Making containers from a continuously extruded tube with moulded ends per se is known from GB-A-15352&7. Furthermore, various methods have been tried of improving the rigidity of the extruded tube. As an example, a closed cell foam has been used for the container walls. Thereby the stiffness for a given weight is increased, but the wall thickness needs to be greater. Also, the impact strength is reduced considerably.
Furthermore, combinations of ribs and corrugations have been used, but their effects appeared to be only marginal. By means of the process according to the invention, a container is obtained which has a thin-walled body with an excellent rigidity and strength. Both features are obtained by biaxially stretching the tube from which the body is made. Manufacturing a bottle from an extruded stretched tube, by cutting said tube in appropriate lengths per se is known from EP-A- 249O. This known process is however not suitable for manufacturing containers such as drums. In said known process, first of all a length is cut from a piece of tubular material, and subsequently said length is stretched. The disadvantage here is that such process is not continuous but takes place in a batch-wise manner. Thereby, end- effects are generated in the lengths of tubular material, which makes this batch-wise process difficult to control. In particular in processing larger diameter tubes, continuous stretching of the tubular material is preferred; it offers a faster process with a uniform quality and reduced failure rate.
Good results are obtained in case the container body is stretched up to 4 times in the radial direction, and the container body is stretched 2-10 times in the axial direction.
Although the process described before is related to extruding a tube, the invention is not limited to such manufacturing method. For instance, according to a second possibility, the process could also comprise the following steps: - stretching a plate of plastic material,
- connecting two opposing edges of the stretched plate so as to form a tubular body,
- connecting an end piece to at least one end of the tubular body. The processes for connecting the end(s) according to the invention can be carried out in various ways. It may comprise the steps of:
-heating the surfaces of each end piece and the corresponding container body end by a heating device until the material of said surfaces is molten;
-removing the heating device;
-pressing each end piece and the container body against one another until the material has solidified.
Alternatively, the process for connecting the end(s) to the tube according to the invention may comprise the steps of:
-forcing at least one end of the container body over a conically shaped mandrel so as to form a conically shaped weldable surface; -providing an end piece for each container body end having a correspondingly, conically shaped weldable surface;
-melting the material of the weldable surfaces;
-pressing each end piece into and against the conically shaped end of the container body until the material has solidified.
Welding the ends to the container body is also possible in several ways, for instance by means of an ultrasonic device, by an infra-red device, or by a vibration device.
The end piece may also be connected to the container body by means of glueing.
For manufacturing a drum with a barrel-shape, the process may additionally comprise the step of heating the container body at least one of its ends for shrinking the plastic material so as to form an end with a converging shape. Furthermore, it is observed that in the process of manufacturing a container from an extruded tube, proper control mechanisms should be applied for cooling the inside and the outside of the extruded tube, so as to obtain a regular stress distribution over the wall thickness. This can for instance be done according to the process described in EP-A-209933- A uniform temperature distribution is necessary in order to enable the stretching process to be carried out in a proper way.
The invention will be explained further with reference to the figures, related to only one of the possible embodiments and methods of manufacturing. Figure 1 shows a schematic view of biaxially stretching a tube.
Figure 2a and b show a first method of welding an end plate to a drum body by means of a hot plate.
Figure 3 shows a second method for welding an end plate to a drum body. A tube of stretchable thermoplastic material such as high density polyethylene (HDPE) is extruded through an annular die 13 and is pulled through a cooling bath 14 by a pulling device 15 such as a set of caterpillars which are situated at regular internals around the tubes. It is subsequently reheated by a reheater 12 and pulled over a mandrel 1. The cooling and heating sections have to be adjusted so that the HDPE is in the temperature range of 100°C-13θ'>C when it is pulled over the mandrel. The mandrel is held in place by means of a pulling rod 2, which is fixed to the extrusion die 13- The tube 4 is pulled over the mandrel 1 by means of pulling device 16 which may also be a set of caterpillars which are situated at regular intervals around the tube. In this pulling process the tube is stretched in the axial direction. Radial stretching also occurs as the tube 3 is pulled over the mandrel 1.
By changing the cross sectional shape of the mandrel (e.g. square or rectangular) a similarly shaped tube can be made.
The biaxially stretched tube 4 thus obtained is cut into pieces of appropriate size by cutting means (not shown) . The pieces 5 thus obtained are to form the drum body of a drum. Figures 2a and 2b show a drum body 5 in question, at one end of which an end piece 6 is situated. By means of a hot plate 7. the facing surfaces of drum body 5 and end piece 6 are heated, such that they can be fused together by pressing them onto each other. In the embodiment of figures 3& and 3b the end of the drum body 5 is forced over a conical heating ring 8, whereby both a conical end section 9 is obtained, and the inner surface of this end section is molten. Furthermore, the end moulding 10, in particular the outer surface 11 thereof, is heated by means of a heating ring 12 until said surface 11 melts.
Subsequently, heating rings 8 and 12 are removed, and the end moulding 10 is pressed into the conically widened end section 9 of drum body 5- Thereby, a solid bond as shown in figure 3 is obtained.
Although in the embodiments described the end pieces are welded to the container body, other methods may be applied as well, such as glueing.

Claims

C l a i m s
1. Container, comprising a tubular container body at the upper and lower ends of which end pieces are connected, characterized in that at least the container body comprises stretched plastic material.
2. Container according to claim 1, wherein at least one of the end pieces comprises stretched plastic material.
3> Container according to claim 1 or 2, wherein the plastic material is stretched into two mutually perpendicular directions.
4. Container according to claim 3. wherein the container body is stretched up to 4 times in the radial direction.
5. Container according to claim 3 or 4, wherein the container body is stretched 2-10 times in the axial direction.
6. Container according to claim 1, 2, 3 4, or 5. wherein the container body consists of a length of biaxially stretched, tubular material.
7- Container to claims 1 to 6, wherein one or both of the ends are of a different colour to the body.
8. Container according to claims 1 to 6, wherein one or both of the ends are of a different material to the body.
9. Process for making a container according to any of claims 1-8 comprising the steps of:
-extruding a tube through an annular die;
-stretching the tube in its axial and/or circumferential direction;
-cutting the tube in lengths so as to obtain a container body; -connecting an end piece to at least one end of each container body.
10. Process according to claim 9ι whereby the tube is cooled as it is extruded and reheated to the correct temperature before stretching.
11. Process according claim 10, whereby the cooling is applied to both the inside as well as the outside of the tube.
12. Process for making a container according to any of claims 1- 8, comprising the steps of: - stretching a plate of plastic material,
- connecting two opposing edges of the stretched plate so as to form a tubular body,
- connecting an end piece to at least one end of the tubular body.
13. Process according to any of claims 9~12, whereby an end piece is connected to both ends of the container body.
14. Process according to any of claims 9~1^ comprising the steps of:
-heating the surfaces of each end piece and the corresponding container body end by a heating device until the material of said surfaces is molten;
-removing the heating device; -pressing each end piece and the container body against one another until the material has solidified.
15. Process according to any of the claims 9-14, comprising the steps of: -forcing at least on end of the container body over a conically shaped mandrel so as to form a conically shaped weldable surface;
-providing an end piece for each container body end having a correspondingly, conically shaped weldable surface;
-melting the material of the welding surfaces; -pressing each end piece into and against the conically shaped end of the container body until the material has solidified.
16. Process according to claim 14 or 15, whereby each end is welded to the container body by means of a hot plate.
17. Process according to claim 14 or 15, whereby each end is welded to the container body by means of an ultrasonic device.
18. Process according to claim 14 or 15, whereby each end is welded to the container body by an infra-red device.
19. Process according to claim 14 or 15, whereby each end is welded to the container body by means of a vibration device.
20. Process according to any of claims 9"12, whereby each end piece is connected to the container body by glueing.
21. Process according to any of claims 9-20, comprising the step of heating the container body at at least one of its ends for shrinking the plastic material so as to form an end with a converging shape.
PCT/NL1996/000345 1996-09-02 1996-09-02 Container of stretched plastic material, and process for making such container WO1998009796A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/NL1996/000345 WO1998009796A1 (en) 1996-09-02 1996-09-02 Container of stretched plastic material, and process for making such container
AU69470/96A AU6947096A (en) 1996-09-02 1996-09-02 Container of stretched plastic material, and process for making such container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NL1996/000345 WO1998009796A1 (en) 1996-09-02 1996-09-02 Container of stretched plastic material, and process for making such container

Publications (1)

Publication Number Publication Date
WO1998009796A1 true WO1998009796A1 (en) 1998-03-12

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Country Status (2)

Country Link
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WO (1) WO1998009796A1 (en)

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WO2000024564A1 (en) * 1998-10-23 2000-05-04 World Class Packaging Systems, Inc. Sealing films to trays
NL1012032C2 (en) * 1999-03-05 2000-09-06 Wavin Bv Method for manufacturing a tube of biaxially oriented thermoplastic plastic material.
EP1179484A1 (en) * 2000-08-09 2002-02-13 Linhardt Metallwarenfabrik GmbH & Co. KG Tubular plastic container with inserted bottom and manufacturing process

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US4447199A (en) * 1980-11-19 1984-05-08 Metal Box Limited Apparatus for making thermoplastics articles
GB2156268A (en) * 1984-03-26 1985-10-09 Vercon Inc Manufacturing thermoplastic tubular containers
US4649962A (en) * 1984-06-26 1987-03-17 Gunter Kollross Hollow tubular sheathing for sausages, and process of manufacture
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EP0371769A2 (en) * 1988-11-30 1990-06-06 Btg International Limited Tubular materials
WO1995025628A1 (en) * 1994-03-22 1995-09-28 Wavin B.V. Method and device for manufacturing biaxially oriented tubing from thermoplastic material
EP0689926A1 (en) * 1994-07-01 1996-01-03 Rhone-Poulenc Films Polyester films utilizable for sealing containers and method for their production

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Publication number Priority date Publication date Assignee Title
US3967991A (en) * 1972-12-08 1976-07-06 Sekisui Kaseihin Kogyo Kabushiki Kaisha Method for producing receptacles from thermoplastic resin foam sheet
US4447199A (en) * 1980-11-19 1984-05-08 Metal Box Limited Apparatus for making thermoplastics articles
GB2156268A (en) * 1984-03-26 1985-10-09 Vercon Inc Manufacturing thermoplastic tubular containers
US4649962A (en) * 1984-06-26 1987-03-17 Gunter Kollross Hollow tubular sheathing for sausages, and process of manufacture
US4809876A (en) * 1987-08-27 1989-03-07 Aluminum Company Of America Container body having improved gas barrier properties
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000024564A1 (en) * 1998-10-23 2000-05-04 World Class Packaging Systems, Inc. Sealing films to trays
NL1012032C2 (en) * 1999-03-05 2000-09-06 Wavin Bv Method for manufacturing a tube of biaxially oriented thermoplastic plastic material.
WO2000053392A1 (en) * 1999-03-05 2000-09-14 Wavin B.V. Thermoplastic tube
US6726863B2 (en) 1999-03-05 2004-04-27 Wavin B.V. Thermoplastic tube
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EP1179484A1 (en) * 2000-08-09 2002-02-13 Linhardt Metallwarenfabrik GmbH & Co. KG Tubular plastic container with inserted bottom and manufacturing process

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