FR2339488A1 - Procede de formage d'une mousse de resine armee de fibres - Google Patents

Procede de formage d'une mousse de resine armee de fibres

Info

Publication number
FR2339488A1
FR2339488A1 FR7702780A FR7702780A FR2339488A1 FR 2339488 A1 FR2339488 A1 FR 2339488A1 FR 7702780 A FR7702780 A FR 7702780A FR 7702780 A FR7702780 A FR 7702780A FR 2339488 A1 FR2339488 A1 FR 2339488A1
Authority
FR
France
Prior art keywords
fiber
forming
resin foam
armed
armed resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7702780A
Other languages
English (en)
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.)
ExxonMobil Technology and Engineering Co
Original Assignee
Exxon Research and Engineering Co
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 Exxon Research and Engineering Co filed Critical Exxon Research and Engineering Co
Publication of FR2339488A1 publication Critical patent/FR2339488A1/fr
Withdrawn legal-status Critical Current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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
    • 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
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
    • B29C44/145—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining the lining being a laminate
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
    • B29C70/086—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers and with one or more layers of pure plastics material, e.g. foam layers
    • 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
    • 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
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/0809—Fabrics
    • 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
    • B29L2009/00—Layered products
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
    • Y10T428/24994—Fiber embedded in or on the surface of a polymeric matrix
    • Y10T428/249942—Fibers are aligned substantially parallel
    • Y10T428/249946—Glass fiber
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249987—With nonvoid component of specified composition
    • Y10T428/24999—Inorganic
FR7702780A 1976-02-02 1977-02-01 Procede de formage d'une mousse de resine armee de fibres Withdrawn FR2339488A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/654,617 US4130614A (en) 1976-02-02 1976-02-02 Method for making structural foams with facing sheets

Publications (1)

Publication Number Publication Date
FR2339488A1 true FR2339488A1 (fr) 1977-08-26

Family

ID=24625581

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7702780A Withdrawn FR2339488A1 (fr) 1976-02-02 1977-02-01 Procede de formage d'une mousse de resine armee de fibres

Country Status (8)

Country Link
US (1) US4130614A (fr)
JP (1) JPS52110775A (fr)
CA (1) CA1079919A (fr)
DE (1) DE2701132A1 (fr)
FR (1) FR2339488A1 (fr)
GB (1) GB1565881A (fr)
IT (1) IT1075257B (fr)
NL (1) NL7701079A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002953A2 (fr) * 1977-12-29 1979-07-11 Rohm And Haas Company Matières plastiques renforcées par des fibres et leur préparation
FR2414403A1 (fr) * 1978-01-16 1979-08-10 Stratiforme Panneau a base de resine phenolique et son procede de fabrication
FR2414995A1 (fr) * 1978-01-23 1979-08-17 Inst Nat Rech Chimique Materiau composite perfectionne a base de matiere thermoplastique et de materiaux fibreux
EP0004478A2 (fr) * 1978-03-29 1979-10-03 Rohm And Haas Company Procédé et dispositif de moulage sous vide de materiaux plastiques en feuilles armées
EP0005843A1 (fr) * 1978-06-06 1979-12-12 H.H. Robertson Company Procédé de fabrication de panneaux de construction en mousse de polyuréthane, revêtus sur leurs deux faces d'une couche de recouvrement
WO1986007103A1 (fr) * 1985-05-23 1986-12-04 Guy Arnaud Materiau stratifie a base de resine thermoplastique et procede pour sa fabrication
EP0627513A1 (fr) * 1993-05-19 1994-12-07 Synteen Gewebe Technik Gmbh Tissu pour le renforcement ou l'armature de structures planes
EP0627514A1 (fr) * 1993-05-19 1994-12-07 Synteen Gewebe Technik Gmbh Tissu pour le renforcement ou l'armature de structures planes

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IT1270728B (it) * 1993-10-19 1997-05-07 Selle Royal Spa Metodo per la realizzazione di supporti elestici integrali, nonche' supporti con esso ottenuti
DE2854544C2 (de) * 1978-12-16 1981-07-23 Fa. Carl Freudenberg, 6940 Weinheim Verfahren zur Herstellung eines faserverstärkten Integralschaum-Formteiles
US4256803A (en) * 1979-01-11 1981-03-17 Societe Anonyme Dite Stratiforme Panel based on polycondensable resin and a method for the manufacture of this panel
FR2454994B1 (fr) * 1979-04-26 1985-09-27 Faure Bertrand Procede de fabrication d'une matelassure comportant un corps en mousse revetu d'une coiffe permeable, par exemple en tissu
US4296053A (en) * 1979-05-24 1981-10-20 Brown Group, Inc. Method of making foamed plastisol insoles for shoes
NL7905380A (nl) * 1979-07-10 1981-01-13 Leer Koninklijke Emballage Opgeschuimde produkten uit condensatiepolymeren.
DE3127253A1 (de) * 1980-07-16 1982-06-16 Comind S.p.A. Azienda Stars, Villastellone, Torino Selbsttragendes element fuer die ausruestung der innenraeume von kraftfahrzeugen, insbesondere instrumentendeck, und verfahren zu dessen herstellung
US4379103A (en) * 1980-08-25 1983-04-05 Detroit Gasket & Manufacturing Co. Method of forming a foam resin core structure having a smooth composite reinforced integral skin
US4459334A (en) * 1981-10-08 1984-07-10 Rmax, Inc. Composite building panel
US4353955A (en) * 1981-11-12 1982-10-12 Basf Wyandotte Corporation Polyurethane foam - fabric composite
JPS58163385A (ja) * 1982-03-20 1983-09-28 美津濃株式会社 インジエクシヨンスキ−板及びその製造方法
DE3215616C2 (de) * 1982-04-27 1984-12-13 Ford-Werke AG, 5000 Köln Verfahren zum Herstellen von Verbundbauteilen in Sandwichbauweise, insbesondere für Kraftfahrzeuge
DE3343534A1 (de) * 1983-12-01 1985-06-13 Siemens Ag Verfahren zum ausgiessen von hohlraeumen
DE3436026A1 (de) * 1984-10-01 1986-04-03 Puroll Hartschaum-GmbH, 8029 Sauerlach Parabolreflektor fuer mikrowellen
US4911876A (en) * 1987-06-15 1990-03-27 The Budd Company Method of forming an integral fiber reinforced structure
US5075142A (en) * 1990-02-20 1991-12-24 E. I. Du Pont De Nemours And Company Thermoformable composite sheet
WO1993003916A1 (fr) * 1991-08-20 1993-03-04 E.I. Du Pont De Nemours And Company Article façonne composite
US5173227A (en) * 1990-12-06 1992-12-22 United Technologies Corporation In-situ molding of fiber reinforced composites to net shape
DE4106659A1 (de) * 1991-03-02 1992-09-03 Elastogran Polyurethane Gmbh Verfahren zur herstellung von kraftfahrzeug-innenverkleidungen o. dgl.
US5580651A (en) * 1991-08-13 1996-12-03 Woodbridge Foam Corporation Energy absorbing panel
US5389316A (en) * 1991-08-13 1995-02-14 Woodbridge Foam Corporation Process for producing an energy absorbing panel
WO1995003170A1 (fr) * 1993-05-04 1995-02-02 Foster-Miller, Inc. Structure sandwich a ame de mousse renforcee par une structure en treillis
US5429784A (en) * 1993-12-06 1995-07-04 Davidson Textron Inc. Method for making a reinforced air bag door cover
US5544908A (en) * 1994-05-06 1996-08-13 K-2 Corporation Thermoplastic composite ski and method of manufacture
US5653923A (en) * 1996-02-29 1997-08-05 Owens-Corning Fiberglas Technology, Inc. Method for making shaped members using a foam froth
US5916093A (en) * 1996-10-24 1999-06-29 American Composite Material Engineering, Inc. Composite fiberglass railcar roof
US5866051A (en) * 1997-04-23 1999-02-02 Industrial Technology Research Institute Method of making continuous glass fiber-reinforced thermoplastic foam sandwich composites
EP1171325B1 (fr) * 1999-04-22 2003-07-02 Magna Interior Systems Inc. Garniture de pavillon pour vehicule comportant un substrat en polyurethane et un stratifie multicouche, et son procede de fabrication
DE10003595C5 (de) * 2000-01-28 2012-10-11 Peguform Gmbh Kunststoffbauteil
US6379762B1 (en) * 2000-03-07 2002-04-30 The Boeing Company Composite structure of expandable matrix and a reinforcing medium
FR2809075B1 (fr) * 2000-05-18 2004-04-02 Norton Sa Performance Plastics Procede de fabrication d'un element modulaire pret a etre colle et procede de montage
US6355339B1 (en) * 2000-07-17 2002-03-12 Foam Matrix, Inc. Mechanically secured foam core reinforcement
US6410609B1 (en) 2000-07-27 2002-06-25 Fomo Products, Inc. Low pressure generating polyurethane foams
CN1468169A (zh) * 2000-09-13 2004-01-14 ����-��˹�ء����� 板形覆盖材料
US6581348B2 (en) * 2001-06-15 2003-06-24 John P. Hunter, Jr. Seamless foam panel roofing system
US6863970B2 (en) * 2002-01-17 2005-03-08 Penske Composites Fastener retention foam sheet and associated method
US20030143366A1 (en) * 2002-01-17 2003-07-31 Jerry Foley Polymeric and fibrous laminate and methods of forming and using same
US6902694B2 (en) * 2002-01-17 2005-06-07 Penske Composites Inc. Fastener retention foam sheet and associated methods
US20070010147A1 (en) * 2004-02-24 2007-01-11 Swiszcz Paul G Flexible glass fiber weave
US20070221324A1 (en) * 2006-03-24 2007-09-27 High Impact Technology, L.L.C. Thermoforming, with applied pressure and dimensional re-shaping, layered, composite-material structural panel
US7790274B2 (en) * 2006-08-02 2010-09-07 High Impact Technology, Llc Layered panel structure including self-bonded thermoformable and non-thermoformable layer materials
US8236220B2 (en) * 2006-08-16 2012-08-07 High Impact Technology, Llc Method of making an embedded-object and composite-material product
US20080163587A1 (en) * 2007-01-05 2008-07-10 Monk Russell A Composite panel structure with frame reinforcement
US20080166526A1 (en) * 2007-01-08 2008-07-10 Monk Russell A Formed panel structure
US20080245028A1 (en) * 2007-04-05 2008-10-09 High Impact Technology, L.L.C. Thermoforming, with applied pressure and dimensional re-shaping, layered, composite-material structural panel
US7810875B2 (en) * 2007-10-05 2010-10-12 Mark Von Edward Genaddi Gerisch Structural pan-chassis stabilization system
US20090308521A1 (en) * 2008-06-12 2009-12-17 High Impact Technology, L.L.C. Compression-selective sheet-material density and thickness and methodology
US20090308007A1 (en) * 2008-06-12 2009-12-17 High Impact Technology, L.L.C. Composite layered panel and methodology including selected regional elevated densification
US8845939B1 (en) * 2008-11-25 2014-09-30 Remington Products Company Foam product with an insert and its method of manufacture
EP2351891A1 (fr) 2010-01-11 2011-08-03 Armacell Enterprise GmbH Matériau d'isolation ayant une résistance mécanique et éléments de construction et composites fabriqués à partir de ceux-ci
US20110171456A1 (en) * 2010-01-11 2011-07-14 Armacell Enterprise Gmbh Insulation material providing structural integrity and building elements and composites made thereof
MX2014002162A (es) * 2011-09-02 2014-04-14 Bayer Ip Gmbh Material compuesto y procedimiento para su produccion.
CA2794108A1 (fr) * 2011-11-09 2013-05-09 Norduyn Inc. Pallette de chargement et sa methode de fabrication
US20130240162A1 (en) 2012-03-13 2013-09-19 Hunter Douglas, Inc. Light Diffusing Roller Blind Assembly
US20140138014A1 (en) * 2012-11-19 2014-05-22 C.A.L.S., Ltd. Composite foam pattern structures
WO2014197473A1 (fr) * 2013-06-03 2014-12-11 Acme Mills Company Stratifié de suspension souple
JP6140064B2 (ja) * 2013-11-29 2017-05-31 積水化成品工業株式会社 繊維強化複合体の製造方法、繊維強化複合体及び輸送機器構成用部材
US10124515B2 (en) * 2014-09-16 2018-11-13 Tempur-Pedic Management, Llc Gel molded pillow and method of producing the same
EP3717243A4 (fr) * 2017-11-28 2021-04-28 Dow Global Technologies LLC Panneau d'isolation à base de polyuréthane
JP6676092B2 (ja) * 2018-03-28 2020-04-08 株式会社豊田自動織機 車体補強構造、及び車体補強構造の製造方法
US11357422B2 (en) 2018-05-23 2022-06-14 Alexandra G. Hammerberg Gradated composite material for impact protection
FR3085127B1 (fr) * 2018-08-22 2020-11-13 Faurecia Automotive Ind Procede de fabrication d'un precurseur d'une peau composite pour piece structurelle et methode de fabrication de ladite piece structurelle
EP3957473B1 (fr) * 2020-08-19 2023-02-08 Webasto SE Procédé de fabrication d'un composant composite de véhicule

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US2727278A (en) * 1952-11-21 1955-12-20 Robert D Thompson Method of making molded composite article
US2728702A (en) * 1951-07-13 1955-12-27 Lockheed Aircraft Corp Composite cellular plastic structure
US2794756A (en) * 1952-10-03 1957-06-04 Roy F Leverenz Reinforced plastic article
US2993233A (en) * 1956-03-27 1961-07-25 Bayer Ag Apparatus and process for making composite structures
US3082486A (en) * 1959-03-25 1963-03-26 Khawam Antoine Method of molding a reinforced foam article
FR1357698A (fr) * 1963-02-25 1964-04-10 Détendeur-régulateur de gaz
US3286004A (en) * 1964-04-30 1966-11-15 Gen Electric Method of manufacturing a foam plastic article
US3713925A (en) * 1970-07-01 1973-01-30 Ppg Industries Inc Asbestos sheet material directly adhered to a cellular foam substrate
FR2206292A1 (fr) * 1972-11-13 1974-06-07 Daiki Sangyo Co Ltd

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GB856998A (en) * 1958-12-05 1960-12-21 Chelton Poppits Ltd Improvements in or relating to moulding plastic articles
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US2728702A (en) * 1951-07-13 1955-12-27 Lockheed Aircraft Corp Composite cellular plastic structure
US2794756A (en) * 1952-10-03 1957-06-04 Roy F Leverenz Reinforced plastic article
US2727278A (en) * 1952-11-21 1955-12-20 Robert D Thompson Method of making molded composite article
US2993233A (en) * 1956-03-27 1961-07-25 Bayer Ag Apparatus and process for making composite structures
US3082486A (en) * 1959-03-25 1963-03-26 Khawam Antoine Method of molding a reinforced foam article
FR1357698A (fr) * 1963-02-25 1964-04-10 Détendeur-régulateur de gaz
US3286004A (en) * 1964-04-30 1966-11-15 Gen Electric Method of manufacturing a foam plastic article
US3713925A (en) * 1970-07-01 1973-01-30 Ppg Industries Inc Asbestos sheet material directly adhered to a cellular foam substrate
FR2206292A1 (fr) * 1972-11-13 1974-06-07 Daiki Sangyo Co Ltd

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002953A2 (fr) * 1977-12-29 1979-07-11 Rohm And Haas Company Matières plastiques renforcées par des fibres et leur préparation
EP0002953A3 (fr) * 1977-12-29 1979-08-08 Rohm And Haas Company Matières plastiques renforcées par des fibres et leur préparation
FR2414403A1 (fr) * 1978-01-16 1979-08-10 Stratiforme Panneau a base de resine phenolique et son procede de fabrication
FR2414995A1 (fr) * 1978-01-23 1979-08-17 Inst Nat Rech Chimique Materiau composite perfectionne a base de matiere thermoplastique et de materiaux fibreux
EP0004478A2 (fr) * 1978-03-29 1979-10-03 Rohm And Haas Company Procédé et dispositif de moulage sous vide de materiaux plastiques en feuilles armées
EP0004478A3 (fr) * 1978-03-29 1979-11-14 Rohm And Haas Company Procédé et dispositif de moulage sous vide de materiaux plastiques en feuilles armées
EP0005843A1 (fr) * 1978-06-06 1979-12-12 H.H. Robertson Company Procédé de fabrication de panneaux de construction en mousse de polyuréthane, revêtus sur leurs deux faces d'une couche de recouvrement
WO1986007103A1 (fr) * 1985-05-23 1986-12-04 Guy Arnaud Materiau stratifie a base de resine thermoplastique et procede pour sa fabrication
EP0627513A1 (fr) * 1993-05-19 1994-12-07 Synteen Gewebe Technik Gmbh Tissu pour le renforcement ou l'armature de structures planes
EP0627514A1 (fr) * 1993-05-19 1994-12-07 Synteen Gewebe Technik Gmbh Tissu pour le renforcement ou l'armature de structures planes

Also Published As

Publication number Publication date
US4130614A (en) 1978-12-19
CA1079919A (fr) 1980-06-24
JPS52110775A (en) 1977-09-17
DE2701132A1 (de) 1977-08-04
GB1565881A (en) 1980-04-23
IT1075257B (it) 1985-04-22
NL7701079A (nl) 1977-08-04

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