GB2179886B - Method and apparatus for production of foamed thermoplastics material - Google Patents

Method and apparatus for production of foamed thermoplastics material

Info

Publication number
GB2179886B
GB2179886B GB8618082A GB8618082A GB2179886B GB 2179886 B GB2179886 B GB 2179886B GB 8618082 A GB8618082 A GB 8618082A GB 8618082 A GB8618082 A GB 8618082A GB 2179886 B GB2179886 B GB 2179886B
Authority
GB
United Kingdom
Prior art keywords
production
thermoplastics material
foamed thermoplastics
foamed
thermoplastics
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB8618082A
Other versions
GB8618082D0 (en
GB2179886A (en
Inventor
Hiromu Fujisaki
Motoshige Hayashi
Motokazu Yoshii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Kaseihin Kogyo KK
Sekisui Kasei Co Ltd
Original Assignee
Sekisui Plastics Co Ltd
Sekisui Kaseihin Kogyo KK
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
Priority claimed from JP60163564A external-priority patent/JPS6223725A/en
Priority claimed from JP60196746A external-priority patent/JPS6256114A/en
Application filed by Sekisui Plastics Co Ltd, Sekisui Kaseihin Kogyo KK filed Critical Sekisui Plastics Co Ltd
Publication of GB8618082D0 publication Critical patent/GB8618082D0/en
Publication of GB2179886A publication Critical patent/GB2179886A/en
Application granted granted Critical
Publication of GB2179886B publication Critical patent/GB2179886B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3442—Mixing, kneading or conveying the foamable material
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/38—Plasticisers, homogenisers or feeders comprising two or more stages using two or more serially arranged screws in the same barrel
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/385—Plasticisers, homogenisers or feeders comprising two or more stages using two or more serially arranged screws in separate 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/465—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using rollers
    • B29C48/467—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using rollers using single rollers, e.g. provided with protrusions, closely surrounded by a housing with movement of the material in the axial direction
    • B29C48/468—Cavity transfer mixing devices, i.e. a roller and surrounding barrel both provided with cavities; Barrels and rollers therefor
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/565—Screws having projections other than the thread, e.g. pins
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/82—Cooling
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/832—Heating
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/834—Cooling
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/84—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders by heating or cooling the feeding screws
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/865—Heating
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • 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
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)
GB8618082A 1985-07-24 1986-07-24 Method and apparatus for production of foamed thermoplastics material Expired GB2179886B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP60163564A JPS6223725A (en) 1985-07-24 1985-07-24 Apparatus for preparation of foamed shape of thermoplastic resin
JP60196746A JPS6256114A (en) 1985-09-05 1985-09-05 Manufacturing device for thermoplastic resin foam

Publications (3)

Publication Number Publication Date
GB8618082D0 GB8618082D0 (en) 1986-09-03
GB2179886A GB2179886A (en) 1987-03-18
GB2179886B true GB2179886B (en) 1989-09-20

Family

ID=26488961

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8618082A Expired GB2179886B (en) 1985-07-24 1986-07-24 Method and apparatus for production of foamed thermoplastics material

Country Status (9)

Country Link
KR (1) KR900003735B1 (en)
CN (1) CN1007717B (en)
AT (1) AT394518B (en)
CA (1) CA1255866A (en)
DE (1) DE3624909C2 (en)
ES (1) ES2001581A6 (en)
FR (1) FR2585282B1 (en)
GB (1) GB2179886B (en)
PT (1) PT83040B (en)

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IT1205847B (en) * 1986-04-29 1989-03-31 Kendall & Co PERFECTED CAVITY TRANSFER MIXER
DE3819605A1 (en) * 1987-02-27 1989-10-19 Reifenhaeuser Masch Use of an apparatus for mixing thermoplastified material as a device for introducing additives into a mass flow of thermoplastified material
DE3712749C1 (en) * 1987-04-15 1988-07-07 Berstorff Gmbh Masch Hermann Use of a secondary extruder of a tandem system for cooling a plastic blowing agent mixture melt produced in a primary extruder
DE3722050A1 (en) * 1987-07-03 1989-01-19 Berstorff Gmbh Masch Hermann METHOD AND EXTRUDER SYSTEM FOR PRODUCING A FOAMABLE PLASTIC MIXTURE
AU604846B2 (en) * 1988-02-25 1991-01-03 Idemitsu Petrochemical Co., Ltd. Process of producing thermoplastic resin sheet and the like and equipment therefor
US4906102A (en) * 1988-04-08 1990-03-06 Reifenhauser Gmbh & Co. Maschinenfabrik Apparatus for mixing thermoplastified synthetic resins
DE3911110A1 (en) * 1988-04-08 1989-10-19 Reifenhaeuser Masch Apparatus for mixing thermoplasticised material as a device for introducing additives into a melt flow of thermoplasticised material
US4900155A (en) * 1988-04-08 1990-02-13 Reifenhauser Gmbh & Co. Maschinenfabrik Method of metering an additive into and mixing it with a thermoplastified synthetic resin
DE3910622A1 (en) * 1988-04-08 1989-10-19 Reifenhaeuser Masch Process for the metered mixing of pumpable additives into a melt flow of thermoplasticised material
CA2006361A1 (en) * 1988-12-27 1990-06-27 Jean G. Korb Method and apparatus for preparing thermoplastic foam
JPH03233814A (en) * 1990-02-09 1991-10-17 Sumitomo Electric Ind Ltd Highly foaming insulator extruder
CA2125894C (en) * 1993-06-16 1998-11-24 Anthony Charles Neubauer Continuous system for processing synthetic thermoplastic materials
DE4402666A1 (en) * 1994-01-29 1995-08-03 Roehm Gmbh Process for briefly treating a plastic melt with a liquid treatment agent and thermoplastic material produced in the process
US6344159B1 (en) 1999-09-21 2002-02-05 Ut-Battelle, Llc Method for extruding pitch based foam
DE10062659B4 (en) 2000-12-15 2005-09-22 Demag Ergotech Gmbh Foaming agent loading and mixing device
TW200403285A (en) * 2001-08-29 2004-03-01 Nippon Kokan Kk Method for recycling expanded styrol resin
DE10157726A1 (en) * 2001-11-24 2003-06-05 Krauss Maffei Kunststofftech Gas loading unit of a polyurethane injection molding machine
KR100517726B1 (en) * 2003-10-30 2005-09-27 동부정밀화학 주식회사 3-Chloro-4-[4-methyl-2-(1H-1,2,4-triazol-l-ylmethyl)-1,3dioxolan-2-yl]phenyl 4-chlorophenyl ether
WO2006063508A1 (en) * 2004-12-13 2006-06-22 Accelergy Shanghai R & D Center Method and system for treating ionic liquids by using capillary electrophoresis
ES2279704B1 (en) * 2005-10-27 2008-06-01 Universidade Da Coruña SYSTEM FOR PROCESSING THERMOPLASTIC POLYMERIC FOAMS, USING CARBON DIOXIDE (CO2) AS A FOAMING AGENT.
CN102700045A (en) * 2012-06-20 2012-10-03 浙江吉利汽车研究院有限公司杭州分公司 Method for preparing automobile bumper from polypropylene through physical foaming
CN103057061B (en) * 2012-12-20 2015-10-28 华南理工大学 Efficient mixing microcellular plastics precise injection molding apparatus and method
DE102013008201B4 (en) 2013-05-14 2017-08-17 Gneuss Gmbh Process for producing a foam body by extrusion and extrusion apparatus for producing a foam body
DE102013008202B4 (en) * 2013-05-14 2017-10-26 Frank van Lück Process for producing a foam body by extrusion and extrusion apparatus for producing a foam body
CN103522573A (en) * 2013-09-13 2014-01-22 无锡锡东能源科技有限公司 Extruder screw for civil gunpowder
KR101716234B1 (en) * 2015-03-18 2017-03-14 주식회사디에이치하우징 Manufacturing apparatus for insulation and flame retardants of polystyrene foam
KR101706067B1 (en) * 2015-03-31 2017-02-16 김종현 Nucleation generatting system for organic foam
KR102069098B1 (en) * 2017-09-15 2020-01-22 강명호 Foam Molding Machine And Foam Molding Method Thereby
CN109435194B (en) * 2018-12-14 2024-03-01 北京化工大学 Be used for thermoplastic polyester foaming forming device
JP7354691B2 (en) * 2019-08-29 2023-10-03 セイコーエプソン株式会社 Plasticizing equipment, three-dimensional modeling equipment and injection molding equipment
US11267175B2 (en) 2019-10-15 2022-03-08 King Steel Machinery Co., Ltd. Injection molding system
US11766812B2 (en) 2019-10-15 2023-09-26 King Steel Machinery Co., Ltd. Injection molding system and injection molding method
CN113878783A (en) * 2020-07-02 2022-01-04 东莞市开来电子有限公司 TPE plastic foaming device and foaming process
US11731324B2 (en) 2021-08-23 2023-08-22 King Steel Machinery Co., Ltd. Molding device and injection molding method thereof
JP7236182B1 (en) * 2021-08-23 2023-03-09 キング スチール マシネリー カンパニー リミテッド Injection molding system and injection molding method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB745480A (en) * 1953-10-09 1956-02-29 Dow Chemical Co A process for the production of cellular thermoplastic products
GB843849A (en) * 1957-11-22 1960-08-10 Ici Ltd Mixing apparatus
GB930339A (en) * 1961-05-01 1963-07-03 Metal Box Co Ltd Improvements in or relating to the extrusion of molten thermoplastic material
GB1137339A (en) * 1966-08-18 1968-12-18 Shell Int Research A process for the production of foam from polymers and/or copolymers of vinyl chloride
US3751377A (en) * 1971-08-19 1973-08-07 Dow Chemical Co Method for the preparation of plastic foam
GB1475216A (en) * 1974-10-09 1977-06-01 Barmag Barmer Maschf Mixing machine
EP0048590A1 (en) * 1980-09-23 1982-03-31 Rapra Technology Limited Extruder mixer
US4454087A (en) * 1981-05-18 1984-06-12 Sekisui Plastics Method and apparatus for preparing thermoplastic resin foam

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BE524084A (en) * 1950-06-29 1900-01-01
NL272537A (en) * 1961-07-24
US3368008A (en) * 1964-01-09 1968-02-06 Azuma Kimikazu Method for producing foamable thermoplastic resin composition
DE2632335C2 (en) * 1976-07-17 1987-04-09 Fried. Krupp Gmbh, 4300 Essen Mixing device
DE3038306C2 (en) * 1980-10-10 1984-03-22 Hermann Berstorff Maschinenbau Gmbh, 3000 Hannover Extrusion device for the production of foamed, thermoplastic plastic
US4436679A (en) * 1981-11-09 1984-03-13 Maryland Cup Corporation Method and apparatus for generating foamed thermoplastic materials
JPS6097805A (en) * 1983-11-02 1985-05-31 Kobe Steel Ltd Single shaft mixtruder

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB745480A (en) * 1953-10-09 1956-02-29 Dow Chemical Co A process for the production of cellular thermoplastic products
GB843849A (en) * 1957-11-22 1960-08-10 Ici Ltd Mixing apparatus
GB930339A (en) * 1961-05-01 1963-07-03 Metal Box Co Ltd Improvements in or relating to the extrusion of molten thermoplastic material
GB1137339A (en) * 1966-08-18 1968-12-18 Shell Int Research A process for the production of foam from polymers and/or copolymers of vinyl chloride
US3751377A (en) * 1971-08-19 1973-08-07 Dow Chemical Co Method for the preparation of plastic foam
GB1475216A (en) * 1974-10-09 1977-06-01 Barmag Barmer Maschf Mixing machine
EP0048590A1 (en) * 1980-09-23 1982-03-31 Rapra Technology Limited Extruder mixer
US4454087A (en) * 1981-05-18 1984-06-12 Sekisui Plastics Method and apparatus for preparing thermoplastic resin foam

Also Published As

Publication number Publication date
ES2001581A6 (en) 1988-06-01
FR2585282A1 (en) 1987-01-30
DE3624909C2 (en) 1995-12-21
CN1007717B (en) 1990-04-25
PT83040A (en) 1986-08-01
AT394518B (en) 1992-04-27
PT83040B (en) 1995-03-01
FR2585282B1 (en) 1989-12-15
KR870001021A (en) 1987-03-10
DE3624909A1 (en) 1987-01-29
GB8618082D0 (en) 1986-09-03
KR900003735B1 (en) 1990-05-30
CN86105207A (en) 1987-08-05
CA1255866A (en) 1989-06-20
GB2179886A (en) 1987-03-18
ATA199286A (en) 1991-10-15

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020724