WO2009033874A1 - Pu-walze und verfahren zu ihrer herstellung - Google Patents
Pu-walze und verfahren zu ihrer herstellung Download PDFInfo
- Publication number
- WO2009033874A1 WO2009033874A1 PCT/EP2008/059792 EP2008059792W WO2009033874A1 WO 2009033874 A1 WO2009033874 A1 WO 2009033874A1 EP 2008059792 W EP2008059792 W EP 2008059792W WO 2009033874 A1 WO2009033874 A1 WO 2009033874A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- roll
- ppdi
- polyurethane
- weight
- hardener
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/02—Rolls; Their bearings
- D21G1/0233—Soft rolls
Definitions
- the invention relates to a method for producing a roll mantle or roll cover of a roll of a PPDI-based plastic.
- the invention also relates to a PPDI polyurethane for producing a roll shell or roll cover of a roll formed by mixing a PPDI prepolymer with a curing agent.
- Polyurethane elastomers which are formed by a one- or multi-stage reaction of PPDI (p-phenylene diisocyanate) with mixtures of polyols, diols and diamines, have been known for several decades.
- PPDI p-phenylene diisocyanate
- PPDI polyurethane elastomers are characterized by high tear and tear propagation resistance, high abrasion resistance, high hydrolysis resistance and high elasticity.
- the object of the invention is therefore to reduce the shrinkage and to improve the green strength, so as to expand the application possibilities of the plastic.
- this object is achieved in that the curing agent added to the polyurethane shortens the pot life to 5 to 60 s.
- the pot life is shortened to 8 to 20 s, in particular 8 to 12 s.
- the reaction rate and the viscosity increase in the course of the crosslinking reaction between the PPDI-based prepolymer and the curing agent can be controlled so that the production of the roll shell or the roll cover is possible by means of rotational molding.
- the plastic is applied to a cylindrical, rotatably mounted casting with a movable parallel to the axis of the casting pouring nozzle, the temperature of the applied plastic should be between 70 and 110 0 C.
- this should contain a catalyst, which is preferably selected from the group of PU polymerization catalysts.
- This group includes various organometallic compounds and salts of Zn, Co, Bi, Hg, Cd, K and the like. such as.:
- peripheral speed is the casting between 15 and 80 m / min and the casting nozzle is moved axially at a speed between 5 and 10 mm / rev.
- the mixture should be carried out with the hardener in a mixing chamber according to the rotor / stator principle.
- the gap width distribution between the rotor and the stator resulting from the structural design should be in the range of 1 to 5 mm and should be as narrow as possible in order to achieve as uniform as possible a shear stress on the reaction mixture and thereby prevent clogging of the mixing chamber in areas of low shear rate.
- the dead volume of the mixing chamber should be as low as possible. Mixing chambers with a dead volume of 5 to 50 ml have proven particularly suitable for mixing a material volume flow of 0.5 to 10 l / min.
- the resulting short residence times require a very effective mixing, which is achieved on the one hand by high rotor speeds in the range of 1000-5000 U / min and on the other hand by flow dividing elements on the rotor and stator, which prevent a straight flow through the mixing chamber.
- the hardener consists of 60 to 99% by weight of 1, 4-butanediol, not more than 40% by weight of diamine and at most 1% by weight of a catalyst.
- the hardener contains at least 1% by weight of diamine and / or at least 0.01% by weight of a catalyst.
- Adiprene LFP 590D Adiprene LFP 950A, Adiprene LFP 850A, Adiprene LFP 1950A, Adiprene LFP 2950A.
- the stoichiometry of the mixture that is the molar ratio between the isocyanate content and the content of reactive hydrogen, should be between 0.85 and 1.15 in order to obtain an optimally balanced material property spectrum.
- Such a produced roll shell or roll cover is very wear-resistant, heavy-duty and durable and is due to the high demands in particular for use in rolls in machines for producing and / or finishing a paper, cardboard, tissue or another fibrous web.
- the roll shell according to the invention is used in a soft roll of a calender.
- the hardness of the PPDI polyurethane in the roll cover is preferably between 80 Shore A and 75 Shore D.
- the loss factor tan ⁇ of the PPDI polyurethane in the roll cover is preferably between 0.01 and 0.03. Due to the low damping, the roll cover is optimized in relation to the maximum possible load pairing pressure / load frequency.
- the elastic modulus of the PPDI polyurethane in the roll cover is preferably between 10 and 3000 N / mm 2 .
- a plastics material for forming a roll cover 1 is applied to a rotatably mounted casting body 2 in the form of a cylindrical roll base body by rotational molding.
- the dynamic mixing chamber 4 operates on the rotor / stator principle.
- the casting body 2 rotates at a preferably constant peripheral speed, which is between 15 and 80 m / min.
- the parallel to the axis of rotation 5 of the casting 2 movable casting nozzle 3 is moved at a speed between 2 and 15, usually between 5 and 10 mm / revolution, so that a uniformly strong relation to the casting 2 is applied.
- the output of the pouring nozzle 3 is between 500 and 10,000 g / min.
- the plastic is formed by PPDI polyurethane, which is produced by mixing a PPDI prepolymer with a hardener in the mixing chamber 4.
- the hardener should shorten the pot life to values between 8 and 12 s. This accelerated crosslinking allows the application of the rotational casting process.
- a hardener consisting of 65% by weight of 1, 4-butanediol, 34.95% by weight of diethyltoluenediamine and 0.05% by weight of dibutyltin laurate.
- the proportion of diamine determines by its extremely fast reaction rate the flow behavior of the plastic mixture at the time of exit from the casting nozzle 3 and in the first 2-5 seconds thereafter. This flow behavior is crucial for successful process control. Too low a viscosity, depending on the speed and diameter of the rotating casting body 2, results in a rapid draining off of the applied material and thus limits the achievable layer thickness. Too high a viscosity prevents uniform flow of the plastic, resulting in an undesirable coarse surface structure (fins) and air pockets.
- the catalyst subsequently causes a rapid re-drawing of the butanediol isocyanate crosslinking reaction. He is thus responsible for a very rapid passage through the period of potty material consistency (cheesy state), during which the workpiece is extremely susceptible to the occurrence of fatal stress cracks. Only the combined use of both hardener components makes it possible to adjust both the flow behavior of the plastic mixture required for the rotational casting process and to ensure a stress-crack-free end product.
- the stoichiometry of the mixture is 95% (isocyanate excess).
- rolls for use in machines for producing and / or finishing a paper, board, tissue or another fibrous web.
- Such rolls are subjected to a very high load and have lengths of up to 10 m and a diameter of up to 2 m.
- the process as well as the plastic are also suitable for the production of flexible roll shells. These are usually by embedded in the plastic fibers, threads o.a. reinforced and are mainly used in the dewatering or smoothing of the fibrous web.
- the roll shells are made in an analogous manner by applying the plastic to a cylindrical casting 2, wherein the finished roll shell, however, withdrawn from the casting 2 or the casting 2 is removed from the cast roll shell.
- Roll covers 1 or roll shells produced in this manner are distinguished by an increase in the permanent load capacity with regard to line load and machine speed and the extension of possible grinding intervals for machining the jacket surface.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Polyurethanes Or Polyureas (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200880106141.4A CN101796092B (zh) | 2007-09-07 | 2008-07-25 | 聚氨酯辊及其生产方法 |
EP08786453A EP2190896A1 (de) | 2007-09-07 | 2008-07-25 | Pu-walze und verfahren zu ihrer herstellung |
US12/718,140 US20100190624A1 (en) | 2007-09-07 | 2010-03-05 | Pu-roll and method to produce same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007042781.8 | 2007-09-07 | ||
DE102007042781A DE102007042781A1 (de) | 2007-09-07 | 2007-09-07 | PU-Walze |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/718,140 Continuation US20100190624A1 (en) | 2007-09-07 | 2010-03-05 | Pu-roll and method to produce same |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009033874A1 true WO2009033874A1 (de) | 2009-03-19 |
Family
ID=39865090
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/059792 WO2009033874A1 (de) | 2007-09-07 | 2008-07-25 | Pu-walze und verfahren zu ihrer herstellung |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100190624A1 (de) |
EP (1) | EP2190896A1 (de) |
CN (1) | CN101796092B (de) |
DE (1) | DE102007042781A1 (de) |
WO (1) | WO2009033874A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2518212A1 (de) | 2011-04-26 | 2012-10-31 | Metso Paper, Inc. | Walzenbeschichtung und Verfahren zur deren Herstellung |
DE102015213512A1 (de) | 2015-07-17 | 2017-01-19 | Voith Patent Gmbh | Verfahren zur Herstellung eines Walzenbezugs |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI123186B (fi) * | 2011-06-23 | 2012-12-14 | Metso Paper Inc | Telapinnoite |
CN102505555B (zh) * | 2011-11-10 | 2014-08-06 | 广州海丝尔橡塑科技有限公司 | 一种高速聚氨酯造纸胶辊及其制造方法与应用 |
DE102012201310A1 (de) * | 2012-01-31 | 2013-08-01 | Voith Patent Gmbh | Walzenbezug mit verbesserten dynamischen Eigenschaften und hohem Rückstellverhalten |
DE102012201782A1 (de) * | 2012-02-07 | 2013-08-08 | Voith Patent Gmbh | Walzenbezug und Verfahren zu dessen Herstellung |
ES2906151T3 (es) * | 2014-07-28 | 2022-04-13 | Voith Patent Gmbh | Procedimiento para la fabricación o el mecanizado de un rodillo, rodillo y capa funcional de un rodillo |
MX2018002285A (es) | 2015-11-17 | 2018-05-28 | Stowe Woodward Licensco Llc | Cubierta de rodillo de poliuretano para rodillo de calandra para maquina para fabricar papel. |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0982079A2 (de) * | 1998-08-24 | 2000-03-01 | UNIROYAL CHEMICAL COMPANY, Inc. | Verfahren zur Herstellung von zylindrischen Gegenständen mit mehrschichtigem unterschiedlichen Überzug ohne Grenzfläche |
WO2001072864A1 (en) * | 2000-03-27 | 2001-10-04 | Uniroyal Chemical Company, Inc. | Rotational casting method for coating a flexible substrate and resulting coated flexible article |
US20030040379A1 (en) * | 1999-07-27 | 2003-02-27 | Callaway Golf Company | Golf ball having a polyurethane cover |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3412071A (en) * | 1964-07-20 | 1968-11-19 | Uniroyal Inc | Polyurethanes cured with polyamine curing agents |
US3523103A (en) * | 1965-06-08 | 1970-08-04 | Liner Technology Inc | Process for polyurethane formation and catalysts therefor |
US3397178A (en) * | 1966-10-13 | 1968-08-13 | Gen Mills Inc | Hardenable epoxy resin compositions |
US4294951A (en) * | 1980-07-14 | 1981-10-13 | Mitsui-Nisso Corporation | Rapid curing polyurethane elastomer prepared from a diphenylmethanediisocyanate based liquid prepolymer and a curing agent containing a polytetramethylene ether glycol, a diol and an organometallic catalyst |
DE3931845A1 (de) * | 1989-09-23 | 1991-04-04 | Bayer Ag | Schnellkristallisierende polyurethansysteme |
DE4118362A1 (de) * | 1991-06-05 | 1992-12-10 | Bayer Ag | Verfahren zur isolierung von rohren |
DE4405061A1 (de) * | 1994-02-17 | 1995-08-24 | Bayer Ag | Verfahren zur Isolierung von Rohren mit Polyurethan-Hartschaumstoffen nach dem Rotationsgußverfahren |
DE19511852A1 (de) * | 1995-03-31 | 1996-10-02 | Hoechst Trevira Gmbh & Co Kg | Hochbelastbare Kern/Mantel-Monofilamente für technische Anwendungen |
US6747117B2 (en) * | 2002-06-14 | 2004-06-08 | Crompton Corporation | Polyurethane/urea composition for coating cylindrical parts |
DE102006020897A1 (de) * | 2006-05-05 | 2007-11-08 | Voith Patent Gmbh | PU-Walze |
-
2007
- 2007-09-07 DE DE102007042781A patent/DE102007042781A1/de not_active Withdrawn
-
2008
- 2008-07-25 EP EP08786453A patent/EP2190896A1/de not_active Withdrawn
- 2008-07-25 WO PCT/EP2008/059792 patent/WO2009033874A1/de active Application Filing
- 2008-07-25 CN CN200880106141.4A patent/CN101796092B/zh active Active
-
2010
- 2010-03-05 US US12/718,140 patent/US20100190624A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0982079A2 (de) * | 1998-08-24 | 2000-03-01 | UNIROYAL CHEMICAL COMPANY, Inc. | Verfahren zur Herstellung von zylindrischen Gegenständen mit mehrschichtigem unterschiedlichen Überzug ohne Grenzfläche |
US20030040379A1 (en) * | 1999-07-27 | 2003-02-27 | Callaway Golf Company | Golf ball having a polyurethane cover |
WO2001072864A1 (en) * | 2000-03-27 | 2001-10-04 | Uniroyal Chemical Company, Inc. | Rotational casting method for coating a flexible substrate and resulting coated flexible article |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2518212A1 (de) | 2011-04-26 | 2012-10-31 | Metso Paper, Inc. | Walzenbeschichtung und Verfahren zur deren Herstellung |
DE202012012798U1 (de) | 2011-04-26 | 2013-11-14 | Metso Paper, Inc. | Walzenbeschichtung, walze und verfahren seiner herstellung |
DE102015213512A1 (de) | 2015-07-17 | 2017-01-19 | Voith Patent Gmbh | Verfahren zur Herstellung eines Walzenbezugs |
Also Published As
Publication number | Publication date |
---|---|
EP2190896A1 (de) | 2010-06-02 |
DE102007042781A1 (de) | 2009-03-12 |
CN101796092A (zh) | 2010-08-04 |
CN101796092B (zh) | 2013-10-30 |
US20100190624A1 (en) | 2010-07-29 |
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