WO1989000918A3 - A method of producing microcellular foams and microcellular foams of semi-crystalline polymeric materials - Google Patents

A method of producing microcellular foams and microcellular foams of semi-crystalline polymeric materials Download PDF

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Publication number
WO1989000918A3
WO1989000918A3 PCT/US1988/002567 US8802567W WO8900918A3 WO 1989000918 A3 WO1989000918 A3 WO 1989000918A3 US 8802567 W US8802567 W US 8802567W WO 8900918 A3 WO8900918 A3 WO 8900918A3
Authority
WO
WIPO (PCT)
Prior art keywords
microcellular foams
semi
producing
crystalline polymeric
polymeric materials
Prior art date
Application number
PCT/US1988/002567
Other languages
French (fr)
Other versions
WO1989000918A2 (en
Inventor
Jonathan S Colton
Nam P Suh
Original Assignee
Massachusetts Inst Technology
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 Massachusetts Inst Technology filed Critical Massachusetts Inst Technology
Publication of WO1989000918A2 publication Critical patent/WO1989000918A2/en
Publication of WO1989000918A3 publication Critical patent/WO1989000918A3/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7404—Mixing devices specially adapted for foamable substances
    • B29B7/7409—Mixing devices specially adapted for foamable substances with supply of gas
    • B29B7/7428—Methodical aspects
    • 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
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/10—Applying counter-pressure during expanding
    • B29C44/105—Applying counter-pressure during expanding the counterpressure being exerted by a fluid
    • 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
    • B29C44/3469—Cell or pore nucleation
    • B29C44/348—Cell or pore nucleation by regulating the temperature and/or the pressure, e.g. suppression of foaming until the pressure is rapidly decreased

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

A method for producing a microcellular foam from a semi-crystalline polymeric material. The material is heated to its melting point at an elevated pressure and then saturated with a uniform concentration of a gas. The pressure is then lowered causing bubble nucleation and growth within the material. The material is then quenched to prevent further foaming. Bubbles on the order of 5um in diameter are produced with a bubble density of approximately 1010 bubbles/cm3.
PCT/US1988/002567 1987-07-29 1988-07-28 A method of producing microcellular foams and microcellular foams of semi-crystalline polymeric materials WO1989000918A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7925187A 1987-07-29 1987-07-29
US079,251 1987-07-29

Publications (2)

Publication Number Publication Date
WO1989000918A2 WO1989000918A2 (en) 1989-02-09
WO1989000918A3 true WO1989000918A3 (en) 1989-03-09

Family

ID=22149362

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1988/002567 WO1989000918A2 (en) 1987-07-29 1988-07-28 A method of producing microcellular foams and microcellular foams of semi-crystalline polymeric materials

Country Status (2)

Country Link
EP (1) EP0377650A1 (en)
WO (1) WO1989000918A2 (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5182307A (en) * 1990-11-21 1993-01-26 Board Of Regents Of The University Of Washington Polyethylene terephthalate foams with integral crystalline skins
US5158986A (en) 1991-04-05 1992-10-27 Massachusetts Institute Of Technology Microcellular thermoplastic foamed with supercritical fluid
US5223545A (en) * 1992-02-03 1993-06-29 The Board Of Regents Of The University Of Washington Polyethylene terephthalate foams with integral crystalline skins
EP0692358A1 (en) 1994-06-24 1996-01-17 Corell Resin Technology B.V. Method for manufacturing a plastic board and a board obtained with this method
NL9401055A (en) * 1994-06-24 1996-02-01 Corell Resin Technology Bv Method for fabricating a plastic lamina, and lamina obtained by said method
DE59607975D1 (en) * 1995-07-14 2001-11-29 Hennecke Gmbh Process for the production of molded polyurethane foams
US6005013A (en) * 1995-08-14 1999-12-21 Massachusetts Institute Of Technology Gear throttle as a nucleation device in a continuous microcellular extrusion system
ATE295254T1 (en) 1996-08-27 2005-05-15 Trexel Inc METHOD FOR EXTRUDING MICROCELL POLYMERS
US6884377B1 (en) 1996-08-27 2005-04-26 Trexel, Inc. Method and apparatus for microcellular polymer extrusion
EP0952908B1 (en) * 1997-01-16 2002-06-12 Trexel, Inc. Injection molding of microcellular material
US6884823B1 (en) 1997-01-16 2005-04-26 Trexel, Inc. Injection molding of polymeric material
ATE226171T1 (en) * 1997-06-26 2002-11-15 Trexel Inc MICROCELLULAR CONTAINER AND METHOD FOR STORING PRODUCTS AT LOW TEMPERATURE IN SUCH CONTAINER
US6235380B1 (en) 1997-07-24 2001-05-22 Trexel, Inc. Lamination of microcellular articles
AU1933799A (en) 1997-12-19 1999-07-12 Trexel, Inc. Microcellular foam extrusion/blow molding process and article made thereby
US6706223B1 (en) 1997-12-19 2004-03-16 Trexel, Inc. Microcelluar extrusion/blow molding process and article made thereby
US6231942B1 (en) 1998-01-21 2001-05-15 Trexel, Inc. Method and apparatus for microcellular polypropylene extrusion, and polypropylene articles produced thereby
US6322347B1 (en) 1999-04-02 2001-11-27 Trexel, Inc. Methods for manufacturing foam material including systems with pressure restriction element
NZ516555A (en) * 1999-07-16 2003-05-30 B Method for forming an article comprising closed-cell microfoam from thermoplastic
IT1319887B1 (en) * 2000-02-07 2003-11-12 Guala Dispensing Spa CLOSURE FOR CONTAINERS, IN PARTICULAR BOTTLE CAP.
EP1289727B1 (en) * 2000-06-06 2005-11-30 Thermaflex International Holding B.V. Process for producing physically foamed polyolefin foams and insulation foams prepared therewith
WO2001096084A1 (en) 2000-06-14 2001-12-20 Asahi Kasei Kabushiki Kaisha Method of injection molding of thermoplastic resin
WO2002026484A1 (en) 2000-09-29 2002-04-04 Trexel, Inc. In-mold decorated articles and methods
ES2301388B1 (en) * 2006-10-17 2009-06-22 Jose Fernando Lopez Diaz PROCEDURE AND MEANS FOR THE MANUFACTURE OF MOLDED PIPES WITH MICROCELULAR CRANIAL STRUCTURE.
EP2815879B1 (en) 2014-09-02 2024-10-09 Mondi AG Polyethylene coextrusion film
EP2803478B1 (en) 2014-09-02 2016-06-29 Mondi Consumer Packaging Technologies GmbH Plastic multilayer film

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1504716A1 (en) * 1963-08-16 1969-09-25 Du Pont Ultra microcellular product and process for making the same
GB1196036A (en) * 1966-11-12 1970-06-24 Basf Ag Production of Expanded Olefin Polymer Moldings.
FR2047910A1 (en) * 1969-06-24 1971-03-19 Sekisui Chemical Co Ltd
DE1704478A1 (en) * 1967-06-06 1971-05-27 Basf Ag Process for the production of profiles from foam
DE1729052A1 (en) * 1966-09-23 1971-06-03 Stamicarbon Process for the production of multicellular molded bodies
FR2071992A1 (en) * 1969-12-22 1971-09-24 Mitsubishi Petrochemical Co Expanded polypropylene
US3793416A (en) * 1969-12-24 1974-02-19 Huels Chemische Werke Ag Process for injection molding foam synthetic resin materials involving introduction of the expansion agent into the metering zone between injection molding steps
FR2228596A1 (en) * 1973-05-08 1974-12-06 Basf Ag
DE2536305A1 (en) * 1974-09-30 1976-02-26 Bakelite Xylonite Ltd STRETCHED POLYOLE FILMS WITH A SUBSTANTIALLY EVEN CELL STRUCTURE AND PROCESS FOR THEIR PRODUCTION
US3975473A (en) * 1974-09-12 1976-08-17 Union Carbide Corporation Process for production of cellular thermoplastic bodies
DE1778373B2 (en) * 1967-04-24 1977-04-14 Mitsubishi Gas Chemical Co., Inc., Tokio PROCESS FOR THE MANUFACTURING OF SIGNIFICANTLY CLOSED-CELL, SHAPED FOAM PRODUCTS FROM OLEFIN POLYMERS
EP0041380A1 (en) * 1980-05-29 1981-12-09 Sekisui Kagaku Kogyo Kabushiki Kaisha Process for producing polyethylene foams
JPS58208328A (en) * 1982-05-31 1983-12-05 Asahi Chem Ind Co Ltd Novel cellular material
JPS59168038A (en) * 1983-03-16 1984-09-21 Asahi Chem Ind Co Ltd Highly expanded, high-density polyethylene foam
US4473665A (en) * 1982-07-30 1984-09-25 Massachusetts Institute Of Technology Microcellular closed cell foams and their method of manufacture
GB2140422A (en) * 1983-04-08 1984-11-28 Asahi Chemical Ind Preparation of foam particles of ethylenic resin and foam moldings prepared therefrom
US4676939A (en) * 1984-06-14 1987-06-30 Japan Styrene Paper Corporation Process for the production of expanded particles of a polypropylene resin

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1504716A1 (en) * 1963-08-16 1969-09-25 Du Pont Ultra microcellular product and process for making the same
DE1729052A1 (en) * 1966-09-23 1971-06-03 Stamicarbon Process for the production of multicellular molded bodies
GB1196036A (en) * 1966-11-12 1970-06-24 Basf Ag Production of Expanded Olefin Polymer Moldings.
DE1778373B2 (en) * 1967-04-24 1977-04-14 Mitsubishi Gas Chemical Co., Inc., Tokio PROCESS FOR THE MANUFACTURING OF SIGNIFICANTLY CLOSED-CELL, SHAPED FOAM PRODUCTS FROM OLEFIN POLYMERS
DE1704478A1 (en) * 1967-06-06 1971-05-27 Basf Ag Process for the production of profiles from foam
FR2047910A1 (en) * 1969-06-24 1971-03-19 Sekisui Chemical Co Ltd
FR2071992A1 (en) * 1969-12-22 1971-09-24 Mitsubishi Petrochemical Co Expanded polypropylene
US3793416A (en) * 1969-12-24 1974-02-19 Huels Chemische Werke Ag Process for injection molding foam synthetic resin materials involving introduction of the expansion agent into the metering zone between injection molding steps
FR2228596A1 (en) * 1973-05-08 1974-12-06 Basf Ag
US3975473A (en) * 1974-09-12 1976-08-17 Union Carbide Corporation Process for production of cellular thermoplastic bodies
DE2536305A1 (en) * 1974-09-30 1976-02-26 Bakelite Xylonite Ltd STRETCHED POLYOLE FILMS WITH A SUBSTANTIALLY EVEN CELL STRUCTURE AND PROCESS FOR THEIR PRODUCTION
EP0041380A1 (en) * 1980-05-29 1981-12-09 Sekisui Kagaku Kogyo Kabushiki Kaisha Process for producing polyethylene foams
JPS58208328A (en) * 1982-05-31 1983-12-05 Asahi Chem Ind Co Ltd Novel cellular material
US4473665A (en) * 1982-07-30 1984-09-25 Massachusetts Institute Of Technology Microcellular closed cell foams and their method of manufacture
JPS59168038A (en) * 1983-03-16 1984-09-21 Asahi Chem Ind Co Ltd Highly expanded, high-density polyethylene foam
GB2140422A (en) * 1983-04-08 1984-11-28 Asahi Chemical Ind Preparation of foam particles of ethylenic resin and foam moldings prepared therefrom
US4676939A (en) * 1984-06-14 1987-06-30 Japan Styrene Paper Corporation Process for the production of expanded particles of a polypropylene resin

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, Vol. 8, No. 52, (C-213), & JP,A,58 208 328 (05.12.1983) ASAHI KASEI KOGYA K.K. *
Patent Abstracts of Japan, Vol. 9, No. 21, (C-263), & JP,A,59 168 038 (21.09.1984) ASAHI KASEI KOGYO K.K. *

Also Published As

Publication number Publication date
EP0377650A1 (en) 1990-07-18
WO1989000918A2 (en) 1989-02-09

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