EP3651979B1 - Procédé de fabrication d'un coussinet de presse - Google Patents

Procédé de fabrication d'un coussinet de presse Download PDF

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Publication number
EP3651979B1
EP3651979B1 EP18740776.2A EP18740776A EP3651979B1 EP 3651979 B1 EP3651979 B1 EP 3651979B1 EP 18740776 A EP18740776 A EP 18740776A EP 3651979 B1 EP3651979 B1 EP 3651979B1
Authority
EP
European Patent Office
Prior art keywords
additive
organically modified
elastomer matrix
fabric
modified siloxane
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.)
Active
Application number
EP18740776.2A
Other languages
German (de)
English (en)
Other versions
EP3651979A1 (fr
Inventor
Rolf Espe
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.)
Hueck Rheinische GmbH
Original Assignee
Hueck Rheinische GmbH
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 Hueck Rheinische GmbH filed Critical Hueck Rheinische GmbH
Publication of EP3651979A1 publication Critical patent/EP3651979A1/fr
Application granted granted Critical
Publication of EP3651979B1 publication Critical patent/EP3651979B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/061—Cushion plates
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/36—Cored or coated yarns or threads
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/443—Heat-resistant, fireproof or flame-retardant yarns or threads
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/47—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads multicomponent, e.g. blended yarns or threads

Definitions

  • the invention relates to two methods for the production of a press cushion, either a thread, a fabric with warp and / or weft threads from the thread and the press cushion made from the fabric from a high temperature-resistant elastomer matrix with an additive to increase the thermal conductivity, or the high temperature-resistant elastomer matrix with the aggregate is doctored onto a fabric with warp and / or weft threads and then crosslinked.
  • Such press cushions are used as pressure compensation fabric in hydraulic press systems when coating wood-based panels (such as plywood, chipboard, MDF or HDF panels) with synthetic resin-impregnated paper webs.
  • the coating is mainly carried out in single-daylight presses with a fast closing speed and short press times (so-called short-cycle presses) at temperatures of 200 to 230 ° C and press pressures of 40 to 60 kg / cm 2 .
  • the coating releases water and formaldehyde vapor.
  • Only high-temperature-resistant materials such as silicone, fluorosilicone and fluororubber and their blends and copolymers are used as the elastomer matrix.
  • document FR 1260 273 A describes a method according to the preamble of claim 4.
  • the invention is based on the object of evenly distributing the aggregate in the press cushion.
  • the additive is dispersed in an organically modified siloxane and incorporated into the elastomer matrix with the organically modified siloxane.
  • the thread preferably has a stabilizing core thread. This increases the tensile strength of the thread.
  • the core thread also preferably consists of a metal. This also improves the heat conduction of the press pad.
  • the use of metallic core threads, for example, is off EP 1 136 248 A1 famous.
  • the elastomer matrix preferably consists of a silicone rubber, a fluorosilicone rubber, a fluororubber or a copolymer consisting of silicone rubber and fluorosilicone rubber.
  • the materials mentioned are resistant to high temperatures.
  • Their use as an elastomer matrix is, for example, off EP 1 136 248 A1 famous.
  • the organically modified siloxane preferably has a comb or block structure modified compared to a polydimethylsiloxane, with further methyl groups preferably being substituted by acrylate, epoxide, phenyl, hydroxyl, amino, carboxyl or alkyl groups.
  • Such organically modified siloxanes are known from inter alia Lehmann K. et al., Heat transfer and flame retardant properties of silicone elastomers, International Polymer Science and Technology 1/2017, Smithers Rapra, Akron / OH, USA 2017 .
  • Organically modified polysiloxanes with a comb or block structure can be dispersed much better, in particular with heat-conductive additives, than the known materials of the elastomer matrix.
  • the choice of Organically modified siloxanes with a comb-like or block-like structure can vary depending on the area of application and intended use, the organic substituent groups being responsible for the desired properties. It is advantageous to choose organically modified polydimethylsiloxanes which have good dispersing properties so that the thermally conductive pigments can be distributed evenly.
  • the incorporated proportion is preferably between 10 and 95 % by weight of the fabric or a proportion of the aggregate between 10 and 95% by weight of the incorporated proportion. With such proportions, meaningful results can be achieved depending on the application.
  • the aggregate preferably has a specific thermal conductivity of at least 1 W / mK .
  • a high-temperature-resistant elastomer matrix with a thermal conductivity of less than 0.2 W / mK useful results can be achieved with such additives.
  • the aggregate preferably consists of silicon oxide, aluminum oxide, calcium carbonate, hexagonal boron nitride, one of the carbon modifications graphite, soot or carbon fibers, pure metal powder such as copper, silver or aluminum or of nanoscale material, in particular single or multi-walled carbon nanotubes.
  • a thermal conductivity at room temperature of over 0, 6 W / mK can be determined and with a proportion of 7.5 % by weight MWKN even a value of over 0.8 W / mK, the unmodified elastomer matrix having a thermal conductivity of 0.24 W / mK .
  • the aggregate is preferably surface-treated, in particular with silanes or silane-based compounds.
  • the thermal conductivity of the elastomer materials is optimally exploited.
  • Silanes are bifunctional compounds that consist of stable organofunctional and hydrolyzable reactive end groups. The hydrolyzable group bonds with the filler surface, while the organofunctional groups with the polymer harmonize. It has also been shown that coated fillers can be incorporated into a polyorganosiloxane more easily than uncoated fillers.
  • the threads of the press pad are preferably equipped with different elastomer mixtures and additives.
  • Such a press pad according to the invention has zones of different thermal conductivity.
  • the press cushion according to the invention can thus be individually adapted to the parameters of the press system, in particular to an uneven temperature distribution in the press system and to the needs of the work process.
  • a first elastomer mixture consists of 45 % by weight silicone elastomer HTV with vinyl groups uncrosslinked with the hardener component di- (2,4-dichlorobenzoyl) peroxide and 55 % by weight organically modified siloxane type Tegosil HT 2100 with filler Al2O3
  • a second elastomer mixture consists of 50 % by weight silicone elastomer HTV with 5 % by weight fluorosilicone elastomer uncrosslinked with the hardener component di- (2,4-dichlorobenzoyl) peroxide and 50 % by weight organically modified polysiloxane with organic polymers arranged along the chain Acrylate base, 30 % by weight of hBN and 5 % by weight of MWKN dispersed therein.
  • the first elastomer mixture After tempering at approx. 200 ° C , the first elastomer mixture has a thermal conductivity of 0.4 W / mK and a Shore hardness of 55 and the second elastomer mixture has a thermal conductivity of 0.75 W / mK and a hardness of 60.
  • the two elastomer mixtures Compared to silicone elastomer HTV without modification (0.24 W / mK, Shore hardness 68), the two elastomer mixtures have a significantly increased thermal conductivity, while the Shore hardness showed a reduced value, which is of course advantageous for the resilience of the press pad.
  • a thread was made from the elastomer matrices, then a fabric with warp and weft threads from the thread and finally a press pad from the fabric. Measurements on the press pads have shown that the thermal conductivity doubles or triples.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Reinforced Plastic Materials (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Artificial Filaments (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Woven Fabrics (AREA)

Claims (10)

  1. Procédé, destiné à fabriquer un coussinet de presse à partir d'une matrice en élastomère résistant à de hautes températures, à l'aide d'un granulat destiné à augmenter la conductibilité thermique étant fabriqué à un fil, un tissu avec des fils de chaîne et/ou de trame du fil et le coussinet de presse à partir du tissu, caractérisé en ce que l'on disperse le granulat dans un siloxane organiquement modifié et on l'incorpore avec le siloxane organiquement modifié dans la matrice en élastomère.
  2. Procédé selon la revendication précédente, caractérisé en ce que le fil comporte un fil d'âme stabilisateur.
  3. Procédé selon la revendication précédente, caractérisé en ce que le fil d'âme est constitué d'un métal.
  4. Procédé, destiné à fabriquer un coussinet de presse, lors duquel l'on applique à la racle une matrice en élastomère résistant à de hautes températures avec un granulat destiné à augmenter la conductibilité thermique sur un tissu avec des fils de chaîne et/ou de trame et on la réticule par la suite, caractérisé en ce que l'on disperse le granulat dans un siloxane organiquement modifié et on l'incorpore avec le siloxane modifié dans la matrice en élastomère.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la matrice en élastomère est constituée d'un caoutchouc de silicone, d'un caoutchouc de silicone fluoré, d'un caoutchouc fluoré ou d'un copolymère, constitué d'un caoutchouc de silicone et d'un caoutchouc de silicone fluoré.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le siloxane organiquement modifié comporte une structure en peigne ou une structure en bloc modifiée par rapport à un polydiméthylsiloxane, des groupes méthyle étant substitués de préférence par des groupes acrylate, époxy, phényle, hydroxyle, amino, carboxyle ou alkyle.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce la part incorporée est comprise entre 10 et 95 % en poids du tissu et/ou une part du granulat est comprise entre 10 et 95 % en poids de la part incorporée.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le granulat fait preuve d'une conductibilité thermique spécifique d'au moins 1 W/mK.
  9. Procédé selon la revendication précédente, caractérisé en ce que le granulat est constitué d'oxyde de silicium, d'oxyde d'aluminium, de carbonate de calcium, de nitrure de bore hexagonal, d'une des modifications carbonées graphite, noir de fumée ou fibres de carbone, de poudre métallique pure, comme le cuivre, l'argent ou l'aluminium ou d'une matière de l'ordre du nanomètre, notamment de nanotubes de carbone à simple paroi ou à parois multiples.
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le granulat a subi un traitement de surface notamment par silanes ou par composés à base de silane.
EP18740776.2A 2017-07-11 2018-07-10 Procédé de fabrication d'un coussinet de presse Active EP3651979B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202017003635.5U DE202017003635U1 (de) 2017-07-11 2017-07-11 Presspolster mit höherer Wärmeleitfähigkeit und verbesserten Rückstelleigenschaften für die Beschichtung von Holzwerkstoffplatten in hydraulischen Ein- und Mehretagenheizpressen
PCT/EP2018/068633 WO2019011902A1 (fr) 2017-07-11 2018-07-10 Procédé de fabrication d'un coussinet de presse

Publications (2)

Publication Number Publication Date
EP3651979A1 EP3651979A1 (fr) 2020-05-20
EP3651979B1 true EP3651979B1 (fr) 2021-08-18

Family

ID=59814765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18740776.2A Active EP3651979B1 (fr) 2017-07-11 2018-07-10 Procédé de fabrication d'un coussinet de presse

Country Status (7)

Country Link
US (1) US11628642B2 (fr)
EP (1) EP3651979B1 (fr)
JP (1) JP6985489B2 (fr)
CN (1) CN111093962B (fr)
DE (1) DE202017003635U1 (fr)
RU (1) RU2726546C1 (fr)
WO (1) WO2019011902A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102302769B1 (ko) * 2020-03-31 2021-09-16 주식회사 앤씰 입체스트링 직조 에어쿠션 및 그 제조 방법
EP4600004A3 (fr) * 2020-04-16 2025-11-05 Välinge Innovation AB Procédé de production d'un élément de construction, dispositif de pressage et procédé de gaufrage d'une surface en bois

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1260273A (fr) * 1960-05-11 1961-05-05 Ici Ltd Coussins pour presses applicables à la fabrication d'objets stratifiés par pressage à chaud ou à froid
DE2319593B2 (de) 1973-04-18 1976-09-23 Becker & van Hüllen Niederrheinische Maschinenfabrik, 4150 Krefeld Presspolster fuer heizplattenpressen
JPS50133969A (fr) * 1974-04-15 1975-10-23
US5075038A (en) * 1988-11-04 1991-12-24 Dow Corning Corporation Electrically conductive silicone compositions
JP3221978B2 (ja) * 1993-05-11 2001-10-22 ヤマウチ株式会社 熱プレス成形用クッション材およびその製造方法ならびに熱プレス成形用クッション材の耐熱性感熱接着シートおよびその製造方法
GB9421573D0 (en) 1994-10-26 1994-12-14 Marathon Belting Ltd A press pad
CN2265283Y (zh) * 1994-11-25 1997-10-22 莱茵缩绒织物有限公司 用于高压和低压压力机的压力机垫
US6737370B2 (en) 2000-03-21 2004-05-18 Rheinische Filztuchfabrik Gmbh Press pad containing fluoroelastomer or fluorosilicone elastomer priority claim
PT1300235E (pt) 2001-09-27 2005-06-30 Heimbach Gmbh Thomas Josef Almofada de pressao
RU2235643C2 (ru) * 2002-07-23 2004-09-10 Кручинина Галина Николаевна Способ изготовления прессовой компенсационной подушки для формующего пресса
CN101415546A (zh) * 2006-04-05 2009-04-22 旭硝子株式会社 脱模膜、脱模性缓冲材料及印刷基板的制造方法
GB0608677D0 (en) * 2006-05-03 2006-06-14 Marathon Belting Ltd Improvements to press pads
JP2008305817A (ja) * 2007-06-05 2008-12-18 Shin Etsu Chem Co Ltd Ｆｐｃ製造用クッションシート
DE202012005265U1 (de) 2012-05-26 2012-06-27 Rolf Espe Presspolster für Ein- und Mehretagenheizpressen mit wärmeleitenden Kontaktschlussfäden in Kett- und/oder Schussrichtung
DE102013100433A1 (de) * 2013-01-16 2014-07-31 Hueck Rheinische Gmbh Presspolster für eine Ein- oder Mehretagenheizpresse

Also Published As

Publication number Publication date
JP6985489B2 (ja) 2021-12-22
US20200171772A1 (en) 2020-06-04
WO2019011902A1 (fr) 2019-01-17
US11628642B2 (en) 2023-04-18
BR112020000243A2 (pt) 2020-07-07
JP2020526680A (ja) 2020-08-31
CN111093962A (zh) 2020-05-01
EP3651979A1 (fr) 2020-05-20
CN111093962B (zh) 2022-04-19
RU2726546C1 (ru) 2020-07-14
DE202017003635U1 (de) 2017-08-22

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