CA2290493A1 - Method of recycling polyester foam - Google Patents

Method of recycling polyester foam Download PDF

Info

Publication number
CA2290493A1
CA2290493A1 CA002290493A CA2290493A CA2290493A1 CA 2290493 A1 CA2290493 A1 CA 2290493A1 CA 002290493 A CA002290493 A CA 002290493A CA 2290493 A CA2290493 A CA 2290493A CA 2290493 A1 CA2290493 A1 CA 2290493A1
Authority
CA
Canada
Prior art keywords
pellets
polyester foam
flakes
dried
recycling polyester
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.)
Granted
Application number
CA002290493A
Other languages
French (fr)
Other versions
CA2290493C (en
Inventor
Walter R. Harfmann
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.)
Genpak Corp
Original Assignee
Genpak, L.L.C.
Walter R. Harfmann
Genpak Corporation
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 Genpak, L.L.C., Walter R. Harfmann, Genpak Corporation filed Critical Genpak, L.L.C.
Publication of CA2290493A1 publication Critical patent/CA2290493A1/en
Application granted granted Critical
Publication of CA2290493C publication Critical patent/CA2290493C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
    • 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
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • 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
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/71—Processes of shaping by shrinking

Abstract

PET foam is processed (24) into flakes. The flakes are densified (26) in a pellet mill at between about 300 ~F and about 350 ~F to produce pellets. The pellets are then dried (28) in a desiccant dryer at about 350 ~F for about 6 hours, so that the dew point of the pellets reaches about - 40 ~F. The dried pellets have an intrinsic viscosity about equal to virgin PET and a crystallinity greater than 20 %. This material can be reused (30) as if it were virgin PET.
CA 2290493 1997-05-20 1998-05-19 Method of recycling polyester foam Expired - Fee Related CA2290493C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/859,202 US6130261A (en) 1997-05-20 1997-05-20 Method of recycling polyester foam
US08/859,202 1997-05-20
PCT/US1998/010213 WO1998052730A1 (en) 1997-05-20 1998-05-19 Method of recycling polyester foam

Publications (2)

Publication Number Publication Date
CA2290493A1 true CA2290493A1 (en) 1998-11-26
CA2290493C CA2290493C (en) 2001-08-14

Family

ID=25330334

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2290493 Expired - Fee Related CA2290493C (en) 1997-05-20 1998-05-19 Method of recycling polyester foam

Country Status (5)

Country Link
US (1) US6130261A (en)
EP (1) EP1066140A1 (en)
AU (1) AU7497598A (en)
CA (1) CA2290493C (en)
WO (1) WO1998052730A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6284808B1 (en) * 1997-02-03 2001-09-04 Illinois Tool Works Inc. Inline solid state polymerization of PET flakes for manufacturing plastic strap by removing non-crystalline materials from recycled PET
US7951449B2 (en) 2002-06-27 2011-05-31 Wenguang Ma Polyester core materials and structural sandwich composites thereof
WO2004103828A2 (en) 2003-05-17 2004-12-02 Microgreen Polymers, Inc. Foamed pet packaging
US9724852B1 (en) 2009-05-22 2017-08-08 Columbia Insurance Company High density composites comprising reclaimed carpet material
US9410026B1 (en) 2009-05-22 2016-08-09 Columbia Insurance Company Rebond polyurethane foam comprising reclaimed carpet material and methods for the manufacture of same
HUE031448T2 (en) 2010-04-29 2017-07-28 Armacell Entpr Gmbh & Co Kg Cellular polyester made of post-consumer flakes and the use of products made thereof
US11111350B2 (en) 2017-10-26 2021-09-07 Wrh Technology, Llc Method for production of low density polyester foam and articles made thereof utilizing low I.V. polyester feedstock

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3607999A (en) * 1969-06-19 1971-09-21 Dow Chemical Co Foam scrap recovery and apparatus
US3746610A (en) * 1971-01-29 1973-07-17 Du Pont Composite boards prepared from foam sheeting
DE3037011C2 (en) * 1980-10-01 1983-12-01 Dynamit Nobel Ag, 5210 Troisdorf Method and device for the continuous production of a sheet-like layer material from foam particles
CH678184A5 (en) * 1989-03-09 1991-08-15 Tisslan S A
DE3923054A1 (en) * 1989-07-13 1991-01-24 Huels Troisdorf METHOD FOR PRODUCING A PANEL OR SHEET-SHAPED LAYER MATERIAL FROM THERMOPLASTIC FOAM
US5286321A (en) * 1990-12-21 1994-02-15 Free-Flow Packaging Corporation System and method for densifying expanded plastic foam materials
US5695133A (en) * 1996-06-19 1997-12-09 Nova Chemicals (International) S.A. Thermoplastic washer/recycler

Also Published As

Publication number Publication date
US6130261A (en) 2000-10-10
WO1998052730A1 (en) 1998-11-26
AU7497598A (en) 1998-12-11
CA2290493C (en) 2001-08-14
EP1066140A1 (en) 2001-01-10

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Legal Events

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