JPS6315135B2 - - Google Patents

Info

Publication number
JPS6315135B2
JPS6315135B2 JP54064905A JP6490579A JPS6315135B2 JP S6315135 B2 JPS6315135 B2 JP S6315135B2 JP 54064905 A JP54064905 A JP 54064905A JP 6490579 A JP6490579 A JP 6490579A JP S6315135 B2 JPS6315135 B2 JP S6315135B2
Authority
JP
Japan
Prior art keywords
mat
zone
pressure
thermoplastic resin
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.)
Expired
Application number
JP54064905A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5577525A (en
Inventor
Arufuretsudo Bauman Jon
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.)
PPG Industries Inc
Original Assignee
PPG Industries Inc
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 PPG Industries Inc filed Critical PPG Industries Inc
Publication of JPS5577525A publication Critical patent/JPS5577525A/ja
Publication of JPS6315135B2 publication Critical patent/JPS6315135B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/12Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10Coating or impregnating independently of the moulding or shaping step
    • B29B15/12Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10Coating or impregnating independently of the moulding or shaping step
    • B29B15/12Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
    • B29B15/122Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/228Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length using endless belts feeding the material between non-rotating pressure members, e.g. vibrating pressure members
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/40Shaping or impregnating by compression not applied
    • B29C70/50Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
    • B29C70/504Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands
    • B29C70/506Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands and impregnating by melting a solid material, e.g. sheet, powder, fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B5/00Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/04Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
    • B30B5/06Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band
    • B30B5/065Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band using anti-friction means for the pressing band
    • B30B5/067Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band using anti-friction means for the pressing band using anti-friction roller means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32Component parts, details or accessories; Auxiliary operations
    • B29C43/44Compression means for making articles of indefinite length
    • B29C43/48Endless belts
    • B29C2043/483Endless belts cooperating with a second endless belt, i.e. double band presses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10Inorganic fibres
    • B32B2262/101Glass fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00Condition, form or state of the layers or laminate
    • B32B2305/08Reinforcements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2315/00Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
    • B32B2315/08Glass
    • B32B2315/085Glass fiber cloth or fabric
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2398/00Unspecified macromolecular compounds
    • B32B2398/20Thermoplastics
JP6490579A 1978-12-04 1979-05-25 Method of laminating glass fiber reinforcing thermal plastic resin Granted JPS5577525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US96595678A 1978-12-04 1978-12-04

Publications (2)

Publication Number Publication Date
JPS5577525A JPS5577525A (en) 1980-06-11
JPS6315135B2 true JPS6315135B2 (it) 1988-04-04

Family

ID=25510726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6490579A Granted JPS5577525A (en) 1978-12-04 1979-05-25 Method of laminating glass fiber reinforcing thermal plastic resin

Country Status (9)

Country Link
JP (1) JPS5577525A (it)
BE (1) BE876870A (it)
CA (1) CA1135923A (it)
CH (1) CH629700A5 (it)
DE (1) DE2948235C2 (it)
FR (1) FR2443325A1 (it)
GB (1) GB2040801B (it)
IT (1) IT1124939B (it)
NL (1) NL7904768A (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019138862A1 (ja) * 2018-01-12 2019-07-18 東レ株式会社 熱可塑性樹脂シートの加熱装置および熱可塑性樹脂成形体の製造方法

Families Citing this family (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6212592Y2 (it) * 1981-04-16 1987-04-01
IT1199977B (it) * 1982-01-28 1989-01-05 Vitrofil Spa Procedimento e dispositivo per la produzione in continuo di lastre di polimeri termoplastici rinforzate con fibre di vetro
DE3242089A1 (de) * 1982-11-13 1984-05-17 Basf Ag Verfahren zur kontinuierlichen herstellung von halbzeug aus faserverstaerkten, thermoplastischen polyurethanen
EP0137449B1 (en) * 1983-10-05 1992-01-22 Nippon Petrochemicals Co., Ltd. Method for producing thermoplastic resin sheet or filler-containing resin sheet
FR2570329B1 (fr) * 1984-09-17 1987-02-06 Solvay Procede et appareillage pour realiser un produit stratifie forme d'une resine thermoplastique renforcee par des fibres
FR2579133B1 (fr) * 1985-03-25 1987-09-25 Atochem Materiau composite polymere thermoplastique renforce de fibres, son procede de fabrication
JPS61279519A (ja) * 1985-06-06 1986-12-10 Nippon Sheet Glass Co Ltd 強化樹脂板連続製造装置
JPS61279520A (ja) * 1985-06-06 1986-12-10 Nippon Sheet Glass Co Ltd 強化樹脂板連続製造装置
DE3530309A1 (de) * 1985-08-24 1987-02-26 Held Kurt Verfahren und vorrichtung zum kontinuierlichen herstellen thermoplastischer kunststoffbahnen
DE3535272C2 (de) * 1985-10-03 1995-04-13 Basf Ag Halbzeug aus einem, mit einem thermoplastischen Kunststoff getränkten textilen Flächengebilde
DE3540389C1 (de) * 1985-11-14 1991-09-26 Santrade Ltd Vorrichtung zur Herstellung von glasmattenverstaerkten Thermoplasten
IT1188405B (it) * 1986-03-03 1988-01-14 Montedison Spa Procedimento per la produzione in continuo di compositi termoplastici termoformabili
JPS6362713A (ja) * 1986-09-03 1988-03-19 Kouseinou Jushi Shinseizou Gijutsu Kenkyu Kumiai 繊維補強樹脂連続成形体の製造方法及びその装置
DE3734276A1 (de) * 1987-10-09 1989-04-20 Lentia Gmbh Faserverstaerkte thermoplaste mit deckfolien
IT1223090B (it) * 1987-11-09 1990-09-12 Amalia Pessina Procedimento per produrre lastre termoplastiche rinforzate ed apparecchiatura relativa
DE3734296A1 (de) * 1987-11-19 1989-04-20 Lentia Gmbh Verfahren und vorrichtung zur herstellung von faserverstaerkten thermoplastplatten
DE3840374A1 (de) * 1988-11-30 1990-05-31 Lentia Gmbh Thermoplastischer faserverstaerkter verbundwerkstoff mit einem gehalt an polyamiden
DE69128374T2 (de) * 1990-03-30 1998-04-02 Kuraray Co Verfahren zur Herstellung eines faserverstärkten Thermoplastkunststoffgiesserzeugnisses und derart hergestelltes Produkt
JP2603353B2 (ja) * 1990-04-20 1997-04-23 日本石油株式会社 ポリオレフィン材料の連続的製造方法
US5164135A (en) * 1990-09-26 1992-11-17 Davidson Textron Inc. In-mold mating of substrate material to vinyl skin covering for the construction of two-component automotive interior trim parts
DE4035610A1 (de) * 1990-11-09 1992-05-14 Basf Ag Verfahren zur herstellung von faserverbundwerkstoffen
KR950013673B1 (ko) * 1991-01-11 1995-11-13 미쓰이도오아쓰 가가쿠 가부시키가이샤 로드상 섬유 보강 수지재의 연속제조방법 및 그 장치
ATA196292A (de) * 1992-10-05 1995-04-15 Danubia Petrochem Polymere Verfahren zur herstellung von faserverstärktem, thermoplastischem material
US5484276A (en) * 1992-11-20 1996-01-16 Takeda Chemical Industries, Ltd. Curing apparatus for molding compound
DE4429599A1 (de) 1994-08-20 1996-02-22 Basf Ag Biegesteifer Faserverbundwerkstoff
EP0842038B2 (de) 1995-07-28 2004-11-03 SAERTEX Wagener GmbH & Co. KG Verfahren zur herstellung einer armierung für thermo- oder duroplastmatrizen
FR2743822B1 (fr) * 1996-01-19 1998-03-20 Vetrotex France Sa Procede et dispositif de fabrication d'un materiau composite
US5665185A (en) * 1996-02-09 1997-09-09 Esfi Acquisition, Inc. Process for preparing glass fiber containing polymer sheet
DE19738388A1 (de) * 1997-09-03 1998-02-26 Inst Verbundwerkstoffe Gmbh Dickenadaptives, flächiges, textilverstärktes Halbzeug mit thermoplastischer Matrix
WO1999032278A1 (fr) * 1997-12-19 1999-07-01 Chisso Corporation Structure lamellaire en resine thermoplastique renforcee par des fibres continues
WO2000000351A1 (de) * 1998-06-30 2000-01-06 Symalit Ag Verfahren zur herstellung eines verbundkörpers aus faserverstärktem kunststoff und nach diesem verfahren hergestellter verbundkörper
US7022200B2 (en) * 2002-01-08 2006-04-04 Amad Tayebi Method of making adhesive-free bonded porous thermoplastic nibs for markers and highlighter applications
EP1570977A1 (de) * 2004-03-05 2005-09-07 Alcan Technology & Management Ltd. Verfahren zur kontinuierlichen Herstellung von faserverstärkten Kunststoffplatten
US20130115412A1 (en) * 2011-11-04 2013-05-09 Havco Wood Products Llc Polyurethane laminates made with a double belt press
KR101607362B1 (ko) * 2012-12-21 2016-03-30 (주)엘지하우시스 복합재료 제조 장치와, 이를 사용하여 제조되는 복합재료, 복합재료 제조 방법
CN103112234A (zh) * 2013-03-04 2013-05-22 苏州裕克施乐塑料制品有限公司 复合材料薄板生产方法及其双张紧装置
CN105612202B (zh) 2013-10-08 2019-10-11 科思创德国股份有限公司 纤维复合材料、其用途及其制备方法
RU2680505C1 (ru) * 2013-11-22 2019-02-21 Сайтек Индастриз Инк. Способ и система для пропитки волокон с получением препрега
EP2875944A1 (de) 2013-11-25 2015-05-27 Bond Laminates GmbH Genarbte Faserverbundwerkstoffe
DE102016202746A1 (de) * 2016-02-23 2017-08-24 Thyssenkrupp Ag Verfahren zum Herstellen eines Halbzeugs, Halbzeug sowie dessen Verwendung
CN110418707B (zh) * 2017-03-13 2022-05-03 赫克塞尔合成有限公司 用于浸渍增强材料的方法和设备
PL3638492T3 (pl) * 2017-06-14 2023-07-10 Php Fibers Gmbh Tasiemkowy materiał kompozytowy
US10982441B2 (en) 2018-03-09 2021-04-20 Tamko Building Products, Llc Multiple layer substrate for roofing materials
WO2021050078A1 (en) * 2019-09-13 2021-03-18 Sabic Global Technologies B.V. Method of forming a composite, and associated composite and apparatus
US11738486B2 (en) * 2021-02-09 2023-08-29 Continuus Materials Intellectual Property, Llc Rapidly heating and cooling composite mats comprised of cellulose and thermoplastic polymer
CN113043626B (zh) * 2021-03-12 2022-08-12 上犹耀兴复合材料有限公司 一种用于玻纤板的挤压成型设备

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112879A (it) * 1974-07-23 1976-01-31 Mitsubishi Plastics Ind

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR927008A (fr) * 1945-05-17 1947-10-17 Sylvania Ind Corp Matières en feuilles et leur fabrication
US2612462A (en) * 1947-11-20 1952-09-30 Johns Manville Laminated insulating block and method of making the same
BE505297A (it) * 1950-10-09
FR1199550A (fr) * 1957-03-14 1959-12-15 Owens Corning Fiberglass Corp Procédé de fabrication de produits composites de mousse et de fibres
US3684645A (en) * 1969-03-25 1972-08-15 Ppg Industries Inc Glass fiber reinforced thermoplastic article
BE758612A (fr) * 1969-11-07 1971-04-16 Bayer Ag Procede et dispositif pour la production de plaques ou de feuilles en matiere thermoplastique renforcees aux fibres, et plaque ou feuille ainsi obtenue
FR2096929A1 (en) * 1970-07-07 1972-03-03 Rhodiaceta Particle board panels - glazed with a pulped polyamide dressing in a single pressing operation
CH509877A (de) * 1970-11-27 1971-07-15 Alusuisse Verfahren und Vorrichtung zur Herstellung von mehrschichtigen Verbundplatten
JPS522424B2 (it) * 1972-08-18 1977-01-21
DE2312816C3 (de) * 1973-03-15 1983-02-03 Basf Ag, 6700 Ludwigshafen Verfahren zur kontinuierlichen Herstellung von Halbzeug aus glasfaserverstärkten thermoplastischen Kunststoffen
DE2500706B2 (de) * 1975-01-09 1979-05-03 Kuesters, Eduard, 4150 Krefeld Presse zur Ausübung einer Flächen pressung
US4098943A (en) * 1975-09-25 1978-07-04 Allied Chemical Corporation Fiber reinforced multi-ply stampable thermoplastic sheet

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112879A (it) * 1974-07-23 1976-01-31 Mitsubishi Plastics Ind

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019138862A1 (ja) * 2018-01-12 2019-07-18 東レ株式会社 熱可塑性樹脂シートの加熱装置および熱可塑性樹脂成形体の製造方法
US11407148B2 (en) 2018-01-12 2022-08-09 Toray Industries, Inc. Heating apparatus for thermoplastic resin sheet and method of manufacturing thermoplastic resin-molded body

Also Published As

Publication number Publication date
CH629700A5 (fr) 1982-05-14
FR2443325A1 (fr) 1980-07-04
IT7927130A0 (it) 1979-11-08
GB2040801A (en) 1980-09-03
IT1124939B (it) 1986-05-14
CA1135923A (en) 1982-11-23
JPS5577525A (en) 1980-06-11
DE2948235C2 (de) 1985-06-05
BE876870A (fr) 1979-12-10
DE2948235A1 (de) 1980-06-12
FR2443325B1 (it) 1982-12-03
GB2040801B (en) 1982-12-08
NL7904768A (nl) 1980-06-06

Similar Documents

Publication Publication Date Title
JPS6315135B2 (it)
US5137668A (en) Method for making pressboard from poly-coated paper using relative movement of facing webs
JPS6278248A (ja) ガラス繊維マット及びその製造方法並びに製造装置
CN110948912B (zh) 一种热塑性连续碳纤维单向带的生产设备及生产工艺
US4269884A (en) Fiber reinforced multi-ply stampable thermoplastic sheet
US3878014A (en) Process for matting melt blow microfibers
US4810445A (en) Process for making pressboard from poly-coated paper
US3234309A (en) Method of producing reinforced tubular plastics
DE3029442A1 (de) Reissfeste, glasfaserverstaerkte thermoplastische folien und verfahren zur herstellung
US5695848A (en) Panel formed from molded fiberglass strands
JP2002536212A (ja) 偏平帯の製造方法
US6663733B2 (en) Resin formed product and methods and devices for making the same
US4302269A (en) Process of forming a fiber reinforced, stampable thermoplastic laminate
DE1956038A1 (de) Verfahren und Vorrichtung zum Herstellen faserverstaerkter Platten oder Folien aus thermoplastischem Material und nach dem Verfahren hergestellte Platte oder Folie
DE1629473B1 (de) Verfahren zur herstellung von gewellten folien aus thermo plastischem material
EP0038559B1 (en) Method of producing an abrasion resistant sheet and apparatus for producing it
US3816204A (en) Process for preparing mats having cushion
EP0084135B1 (de) Verfahren zur Herstellung von Formkörpern aus faserverstärkten Schichtstoffen
EP0597227A1 (de) Verfahren zur Herstellung von faserverstärktem, thermoplastischem Material und Vorrichtung zur Durchführung des Verfahrens
DE2228210A1 (de) Geschichtetes Erzeugnis, dessen Herstellung und dessen Verwendung
US3147164A (en) Method of making shaped laminated resinous products
JPH04366627A (ja) 繊維強化シート
JPH0433807A (ja) 強化樹脂成形材料の製造装置
JPH05147034A (ja) スタンプ成形用シートの製造法
CA1052967A (en) Method and machine for making resin panels