WO2003014589A1 - Materiau a base de fibres pour materiau de frottement humide - Google Patents
Materiau a base de fibres pour materiau de frottement humide Download PDFInfo
- Publication number
- WO2003014589A1 WO2003014589A1 PCT/JP2002/007201 JP0207201W WO03014589A1 WO 2003014589 A1 WO2003014589 A1 WO 2003014589A1 JP 0207201 W JP0207201 W JP 0207201W WO 03014589 A1 WO03014589 A1 WO 03014589A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fiber
- pulp
- wet friction
- base material
- friction material
- Prior art date
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 174
- 239000002783 friction material Substances 0.000 title claims abstract description 52
- 239000000463 material Substances 0.000 title claims abstract description 47
- 239000000945 filler Substances 0.000 claims abstract description 9
- 239000003607 modifier Substances 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 8
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 5
- 238000002788 crimping Methods 0.000 claims description 3
- 206010061592 cardiac fibrillation Diseases 0.000 abstract description 4
- 230000002600 fibrillogenic effect Effects 0.000 abstract description 4
- 239000004033 plastic Substances 0.000 abstract description 4
- 229920003023 plastic Polymers 0.000 abstract description 4
- 230000002378 acidificating effect Effects 0.000 abstract description 3
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 19
- 238000012360 testing method Methods 0.000 description 18
- 239000002253 acid Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 13
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 11
- 238000009987 spinning Methods 0.000 description 11
- 229920001577 copolymer Polymers 0.000 description 8
- 229920000642 polymer Polymers 0.000 description 8
- 230000014759 maintenance of location Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 5
- 238000010009 beating Methods 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 5
- 239000004745 nonwoven fabric Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 241000531908 Aramides Species 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 229920003235 aromatic polyamide Polymers 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000002759 woven fabric Substances 0.000 description 4
- 239000003125 aqueous solvent Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229920001519 homopolymer Polymers 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000005909 Kieselgur Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- -1 acryl Chemical group 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 238000009998 heat setting Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012210 heat-resistant fiber Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 241000239366 Euphausiacea Species 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000001746 atrial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical class O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000000578 dry spinning Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/025—Compositions based on an organic binder
- F16D69/026—Compositions based on an organic binder containing fibres
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/18—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/12—Organic non-cellulose fibres from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/18—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylonitriles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0082—Production methods therefor
- F16D2200/0095—Mixing an aqueous slurry of fibres with a binder, e.g. papermaking process
Definitions
- the present invention relates to a fibrous base material useful for forming a wet friction material used for clutches, differentials, brakes, and the like of automobiles, vehicles, industrial machines, and the like.
- the present invention relates to a fiber base material for a friction material.
- wet friction materials that function in lubricating oils with cooling and lubricating effects are used in automotive automatic transmissions, differentials for four-wheel drive vehicles, hermetically sealed wet paints, and the like.
- As an organic fiber material for the wet friction material it is inexpensive compared to Alamid pulp, has excellent adhesiveness to the binder, improves the strength of the wet friction material, and has a porosity of ataryl fiber or buoyril.
- Acryl fiber has been used.
- a wet friction material using 5 to 50% by weight of fibrillated acryl fibers with respect to the total fiber amount is disclosed. No.
- acrylic fiber and fibrillated acryl fiber which have been conventionally used as a fiber base material of wet friction material, have an extreme elastic modulus due to sliding and compressive stress for a long time in a high temperature wet friction material.
- the fiber was plastically deformed.
- the wet-type friction material is eroded, and pores formed between the fibers are crushed, and an appropriate oil film cannot be obtained.
- lubricating oils usually contain zeolite compounds such as calcium disulfonate and zinc dialkyldithiophosphate as detergents and dispersants and antiwear agents, but these generate acidic decomposition products by heat. I do. This not only deteriorates the cellulosic pulp used in combination, but also degrades the acrylic fiber / fibrillated acryl fiber conventionally used in wet friction materials. It is also a problem that the production is accelerated and the durability is reduced.
- zeolite compounds such as calcium disulfonate and zinc dialkyldithiophosphate as detergents and dispersants and antiwear agents
- An object of the present invention is to provide a fiber base material that provides a wet friction material used for clutches, differential gears, brakes, and the like of vehicles, industrial machines, and the like, in which plastic deformation of fibers and acid decomposition products of lubricating oil additives are required.
- An object of the present invention is to provide a fiber base material for wet friction material which does not deteriorate and has excellent durability.
- the present invention solves the above problems by using a homoacrylonitrile fiber which maintains a constant elastic modulus in a high-temperature friction material and has a small heat shrinkage. That is, the present invention relates to a homoacrylonitrile fiber (hereinafter, also referred to as a humoataryl fiber) having an elastic modulus at 180 ° C of 10 cN / dtex or more and a shrinkage rate at 200 ° C of 5% or less.
- a homoacrylonitrile fiber hereinafter, also referred to as a humoataryl fiber
- Wet friction material comprising Z or a fiber component containing 5 to 50% by weight of pulp-like homoacrylonitrile fiber (hereinafter, also referred to as homoacryl pulp) obtained by converting the homoacrylonitrile fiber into a vipril, a friction modifier and a filler.
- the fiber substrate for a wet friction material of the present invention has a weight ratio of homoacrylic fiber and homoacrylic pulp of 50/50 to 10Z90, and the homoacrylic fiber is crimped.
- the object of the invention can be more highly achieved by using a fiber cut to 0.5 to 4 mm later (hereinafter also referred to as a curved homo acrylic short fiber).
- the polymer which is a raw material of the homoacryl fiber and the Z or homoacryl pulp employed in the present invention is a homopolymer using only an acrylonitrile monomer as a type of the polymerizable monomer.
- the so-called acrylic fiber hereinafter referred to as copolymer acryl fiber
- copolymer acryl fiber which uses a different kind of monomer as a copolymer monomer, disturbs the crystallinity of the copolymer and causes spinning to improve the degree of crystallinity described later. Even if this method is adopted, the degree of crystallinity does not increase.
- copolymer acrylic fiber is used as a fiber base material for a wet friction material, the wet friction material loses its fiber when operated for a long period of time, resulting in friction. The problem that the friction coefficient cannot be maintained occurs.
- copolymer acryl fibers have a low resistance to acidic decomposed substances caused by additives in the lubricating oil, and are deteriorated by being exposed to them for a long period of time. The object of the present invention cannot be achieved.
- the homoacrylic fiber made of a homopolymer of acrylonitrile used in the present invention has extremely high chemical resistance such as acid resistance, and solves all problems associated with the use of copolymer acryl fiber. be able to.
- Known solvents can be used for spinning the polymer which is a raw material of homoacryl fibers and / or homoacryl pulp.However, when spinning with a solvent using an organic solvent represented by DMSO, DMA, or DMF, a high temperature is required.
- an inorganic aqueous solvent such as an aqueous solution of sodium thiocyanate (hereinafter, also referred to as PRS), an aqueous solution of nitric acid, or an aqueous solution of zinc chloride is particularly preferable since the elastic modulus and acid resistance tend to slightly decrease.
- Homoacryl fiber and Z or homoacryl pulp have an elastic modulus at 180 ° C. of at least 10 cN / dtex, preferably at least 13 cN / dtex.
- the elastic modulus at 180 ° C refers to the measurement of the elastic modulus in accordance with JISL 1095 in a dry heat box at 180 ° C, and in the recorded load / elongation chart. The inclination at 5% tensile elongation of the fiber was calculated according to the same JIS.
- Circulating lubricating oil with the function of cooling wet friction materials is about 120 ° C, but due to the recent advancement and sophistication of automatic transmission, the temperature of wet friction materials has reached 180 ° C. It rises to near.
- the modulus of elasticity of homoacrynole fiber and Z or homoacrylic pulp at 180 ° C is less than 10 cN / dtex, when the wet friction material is operated for a long period of time, the fiber collapses and pores are stabilized The friction coefficient cannot be maintained, and in the worst case, seizure occurs, so that the purpose of the present invention cannot be achieved.
- the raw material polymer is a homopolymer of acrylonitrile, and this requires a higher molecular weight of the polymer, a higher concentration of the spinning polymer dope, Known techniques such as spinning by an air gap and high drawing after dry spinning can be used in an appropriate combination.However, in order to obtain a preferable elastic modulus at 180 ° C, all the techniques must be used. Is needed.
- the molecular weight, the concentration of the spun polymer dope, and the dry heat drawing ratio after spinning are not particularly limited as long as a homoacrylic fiber having the characteristics of the present invention can be obtained.
- Mw is 150,000 or more, preferably 200,000 or more.
- the concentration of the spinning polymer dope may be determined in consideration of the molecular weight, the type of solvent, the viscosity of the dope, the operation stability in the spinning process, and the like.
- the dry heat stretching ratio after spinning also needs to be considered in consideration of the dry heat temperature and operation stability, and cannot be uniquely defined, but may be 1.6 times or more, preferably 2.0 times or more.
- the homoacryl fiber and / or homoacryl pulp in the present invention is required to have a shrinkage ratio at 200 ° C. within 5 ⁇ 1 ⁇ 2.
- 20% is used in the formation of the wet friction material.
- a pressure and heat treatment at about 0 ° C. is performed, the homoacryl fibers in the present invention do not undergo plastic deformation even in such a high temperature state.
- the shrinkage of the fiber at 200 ° C exceeds 5%, the fibrous base material shrinks in such a heating process, causing a problem that the dimensions of the wet friction material are not constant.
- the fiber base material for wet friction material cannot be obtained.
- the measurement of the shrinkage ratio at 200 ° C. is as follows. Measured under a load of 0.1 cN per 1 dte X of fiber bundle at normal temperature, and measured and marked 100 cm in a hot air dryer at 200 ° C for 10 minutes. After standing still with no load, naturally cooling to room temperature, and measuring again under the same load, the length is expressed as A (cm) and is expressed by the following formula.
- a spun homoacryl fiber is maintained in its dimensions.
- the homoacrylic fiber obtained as described above can be cut to an appropriate length and used as it is, or can be used as a homoacrylic pulp as described later. Can also be used.
- the fiber base material is composed of a fiber component containing 5 to 50% by weight of these homoacrylic fibers and / or homoacrylic pulp, a friction modifier, and a filler. Wherein the proportion of homo acrylic fibers and Z or homo ⁇ acrylic pulp to the total fiber component of the wet friction material fiber base material is 5 to 5 0 wt 0/0.
- the homoacryl fiber and the non- or homoacryl pulp are made together with the above-mentioned other fiber components and, in some cases, with a friction modifier, to prepare a fiber base material as a base paper.
- a fiber base material as a base paper.
- crimped cotton with a thickness of 8 to 76 mm and combined with other fiber components to form a sheet with a nonwoven fabric made of dry nonwoven fabric or a woven fabric made of spun yarn, and used as a fiber base material for wet friction materials Can also be used.
- the fibers When a method of producing a base paper by a papermaking method is used as a fiber base material, the fibers mainly form a horizontally oriented structure.
- the wet friction material made of this fiber base material is repeatedly compressed and operated in the vertical direction, the elastic repulsion of the fiber does not work effectively in such a fiber base material in which the fibers are oriented in the horizontal direction. was there. Therefore, as a result of examining the problem of force, the homoacrylic fiber was crimped and the fiber was bent to form a short-cut curved homoacrylic short fiber, so that the short fiber took a three-dimensional structure in the fiber base material. Therefore, it has been found that the elastic repulsive force of the fiber against the surface pressure during sliding works effectively and that a wet friction material with less set can be obtained.
- the crimped fiber preferably has a fiber length of 0.5 to 4 mm suitable for achieving a three-dimensional structure in the base paper.
- a fiber length of 0.5 to 4 mm suitable for achieving a three-dimensional structure in the base paper.
- it is shorter than 0.5 mm Not only is the fiber coming off, but also the cutting cost is increased, and the variation in fiber length due to the miscat becomes large.
- the length is longer than 4 mm, it is difficult to disperse into single fibers in water when preparing the base paper, and there is a problem that undispersed lumps of fibers are formed and the surface uniformity of the fiber base material is deteriorated.
- a usual crimper for applying crimp can be used as a device for applying crimp.
- the degree of crimping it is expressed as the crimping ratio C i and the number of crimps C n used for ordinary cotton for spinning, and is 7 to 13% and 6 to 13 respectively. Individual Z inch is preferred.
- a base paper When a base paper is used as a fiber base material in the production of a wet friction material, it is particularly effective to use pulp fibers having a binder effect in order to improve the strength of the base paper. As the strength of the base paper increases, the strength of the wet friction material against sliding stress also increases, and the durability against cracking and breakage during long-term operation further improves.
- the fibrillated pulp-like fibers work effectively for the above-mentioned three-dimensional structure of the fiber base material, the fibrous pulp-like fibers have these pulp characteristics in addition to the characteristics of the homoacrylic fibers used in the present invention.
- Homoretharyl pulp can be obtained by fibrillating the above-mentioned homoataryl fiber.
- General fibrillating machines can be used for fibrillation, but whisk crepe fibers are tough and require some contrivance when beating. That is, when using Refina, the whispering fiber is cut into 2 to 6 mm, and the weight is 1 to 4 weight which is dispersed alone in water without including other fibers.
- the degree of freeness which is the degree of fibrillation of homoacrylic pulp, can be adjusted as appropriate to achieve the appropriate pore size and base paper strength in accordance with the balance with other fiber components and friction modifiers.
- Canadian A standard freeness of 260 to 600 m1 is preferable from the viewpoint of a balance between the binder effect and the cost of fibrillation.
- Ataryl pulp even when used alone, effectively works on the basic durability of wet friction materials using a fibrous base material, but because of the beating and pulping of fibers. Therefore, its surface area has become extremely large. Therefore, the resistance to chemicals such as acid degradation products tends to be slightly lower than that of homoacrylic fibers. Therefore, it is more effective to use the humor krill fiber and the homoacryl pulp at an appropriate ratio. That is, when the weight ratio of homoacryl fiber and homoacryl pulp is 5 OZ 50 to 100 Z90, a good wet friction material that balances the acid resistance of the fiber base and the strength of the fiber base. A fiber base material is obtained.
- a fiber component composed of a homoacryl fiber and / or a homoacryl pulp and the above-mentioned other heat-resistant fibers, friction It is obtained by dispersing the conditioning material and other fillers together in water to form a slurry, agglomerating with a coagulant, making a paper using a paper machine, forming a sheet, drying and punching.
- the friction modifier and the filler may be applied after coating by coating or impregnation.
- the fiber length of the homoacrylic fiber is preferably 0.5 mm to 4 mm in order to balance the above-mentioned cut cost and dispersibility in water dispersion.
- the nonwoven fabric or woven fabric can be obtained by forming a nonwoven fabric or woven fabric in advance with a fiber component, and then impregnating and coating with a friction modifier or other filler.
- a friction modifier known materials such as cash dust, graphite, molybdenum disulfide, aluminum powder and the like can be used.
- the filler for example, barium sulfate, calcium carbonate, magnesium carbonate, diatomaceous earth and the like can be used.
- the fiber base material of the present invention is extremely useful for forming a wet friction material having excellent long-term durability.
- a binder represented by a thermosetting resin or the like, and a fiber base material of the present invention are pressed and heated according to a conventional method of forming a friction material, and a metal fitting is further provided as necessary. Installing.
- Typical examples of the above-mentioned resins include fuynol resins, epoxy resins, melamine resins, imide resins, polyester resins, and the like.
- This fiber base material is cut into a test piece by cutting it to a width of 2 cm and a length of 20 cm.
- a gripping length of 15 cm (longitudinal direction) and a tensile speed of 10 c The strength of the fiber base was measured by measuring the mZ component with a Tensilon measuring machine.
- As an acid resistance test a test specimen of the same size was immersed in 35% dilute sulfuric acid, pulled up, air-dried, and heated at a hot plate temperature of a press molding machine (M-2, manufactured by Shinto Co., Ltd.). Compression and release were repeated every 5 seconds at 80 ° C and a surface pressure of 100 kg Z cm 2 .
- the strength was measured in the same manner as the strength of the fiber base described above, and the percentage of the strength of the fiber base at the initial stage (before the acid resistance test) was defined as the strength retention after the acid resistance test.
- the thickness of the test specimen was measured, and the amount of decrease in the initial thickness of the fiber base material was defined as the amount of sag after the acid resistance test. The thickness was measured at any five points on the test specimen and averaged.
- a test specimen was cut into a piece with a width of 20 cm and a length of 20 cm, which was heated for 10 minutes with a hot air drier at 200 ° C, and then cooled vertically and horizontally. Measure the dimensions The shrinkage area of the sample was determined as a percentage. Table 3 also shows the strength of the fiber substrate, the strength retention after the acid resistance test, and the heat shrinkage.
- the use of homoacrylic fiber (No. 1 to No. 4 in Table 1) and homoacrylic pulp (No. 1 and No. 2 in Table 2) satisfying the requirements of the present invention is 5% to 50% of the fiber component.
- the fibrous base materials used (No. 1 to No. 9 in Table 3) have low heat shrinkage and good values for the strength retention and set amount after the acid resistance test. This is the basis for the fact that there is little problem with core metal adhesion during the production of wet friction materials, and that when operated as a wet friction material, high durability and stable friction characteristics can be obtained.
- the homo-acrylic fiber (No. 5 in Table 1) having a large heat shrinkage at 200 ° C was used, the heat shrinkage of the fiber base material was also large (Comparative Example No.
- Example No. 1 1 showed significant deterioration in the acid resistance test, and the test piece was damaged during the test.
- Example No. 4 in which homo-acryl pulp was used alone for the fiber substrates of Nos. 1 to 3 and 6 to 9 in Example No. 4 in which humoa tharyl fiber and homoataryl pulp were used in combination.
- Example No. 5 in which the amount was somewhat large and only homoacrylic fiber was used, the fiber base strength and the strength retention after the acid resistance test were slightly reduced, and it is preferable that the homoacrylic fiber and the homoacrylic pulp be used in combination. I understand.
- Example 1 using the preferred homoacrylic fiber having an elastic modulus of 180 ° C No. 1 in Table 1
- the amount of set after the acid resistance test was further reduced as compared with Example 2, and a good value was obtained.
- the fiber base material has excellent durability, is balanced in fiber base strength, and is an excellent fiber base material for wet friction materials.
- Example No. 9 a homoacryl fiber spun using an organic solvent, DMSO, was used. Compared to Example No. 2 (using homoacryl fibers spun using PRS, which is an inorganic aqueous solvent), the amount of sag after the acid resistance test was compared to Example No. 2 (using homoacryl fibers spun using an inorganic aqueous solvent PRS). And the strength retention rate tended to decrease. In the examples, the strength of the fiber base material of No. 4 was increased, but this was not limited to homoacrylic pulp but also to linter pulp and aramide pulp. This is considered to be the effect of increasing the lump component as a whole.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Braking Arrangements (AREA)
- Mechanical Operated Clutches (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2004-7001545A KR20040022223A (ko) | 2001-08-03 | 2002-07-15 | 습식 마찰재용 섬유 기재 |
US10/483,247 US7309725B2 (en) | 2001-08-03 | 2002-07-15 | Fiber base material for wet friction material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001/236435 | 2001-08-03 | ||
JP2001236435A JP4911334B2 (ja) | 2001-08-03 | 2001-08-03 | 湿式摩擦材用繊維基材 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003014589A1 true WO2003014589A1 (fr) | 2003-02-20 |
Family
ID=19067703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/007201 WO2003014589A1 (fr) | 2001-08-03 | 2002-07-15 | Materiau a base de fibres pour materiau de frottement humide |
Country Status (5)
Country | Link |
---|---|
US (1) | US7309725B2 (ja) |
JP (1) | JP4911334B2 (ja) |
KR (1) | KR20040022223A (ja) |
CN (1) | CN1258049C (ja) |
WO (1) | WO2003014589A1 (ja) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004332830A (ja) * | 2003-05-08 | 2004-11-25 | Dainatsukusu:Kk | 高トルク容量湿式ペーパー摩擦材 |
US8021744B2 (en) | 2004-06-18 | 2011-09-20 | Borgwarner Inc. | Fully fibrous structure friction material |
US8603614B2 (en) | 2004-07-26 | 2013-12-10 | Borgwarner Inc. | Porous friction material with nanoparticles of friction modifying material |
US7429418B2 (en) | 2004-07-26 | 2008-09-30 | Borgwarner, Inc. | Porous friction material comprising nanoparticles of friction modifying material |
JP5468252B2 (ja) | 2005-04-26 | 2014-04-09 | ボーグワーナー インコーポレーテッド | 摩擦材料 |
US8394452B2 (en) | 2005-11-02 | 2013-03-12 | Borgwarner Inc. | Carbon friction materials |
EP1963568A2 (en) * | 2005-12-21 | 2008-09-03 | E.I. Du Pont De Nemours And Company | Friction papers containing pipd fibers |
CN101058896B (zh) * | 2006-04-17 | 2012-06-20 | 上海兰邦工业纤维有限公司 | 聚丙烯腈浆粕状纤维的制备 |
CN101280470B (zh) * | 2007-04-02 | 2012-04-25 | 上海兰邦工业纤维有限公司 | 一种聚丙烯腈浆粕状纤维连续化制造方法 |
JP4456662B2 (ja) * | 2007-06-07 | 2010-04-28 | 株式会社クラレ | 樹脂含浸平面紙及びそれからなる粘着テープ |
WO2009026129A2 (en) * | 2007-08-17 | 2009-02-26 | Borgwarner Inc. | High temperature fibers and combinations for friction materials |
WO2009053331A1 (en) * | 2007-10-23 | 2009-04-30 | Teijin Aramid Gmbh | Refined fiber |
JP5400300B2 (ja) * | 2008-01-21 | 2014-01-29 | 帝人株式会社 | 捲縮繊維及びそれを用いた湿式摩擦材 |
DE102008013907B4 (de) | 2008-03-12 | 2016-03-10 | Borgwarner Inc. | Reibschlüssig arbeitende Vorrichtung mit mindestens einer Reiblamelle |
DE102009030506A1 (de) | 2008-06-30 | 2009-12-31 | Borgwarner Inc., Auburn Hills | Reibungsmaterialien |
JP5560663B2 (ja) * | 2009-11-05 | 2014-07-30 | 新神戸電機株式会社 | 繊維基材の製造法及び樹脂製歯車の製造法 |
US8563448B2 (en) * | 2010-01-29 | 2013-10-22 | Eaton Corporation | Friction member and friction material thereof |
US20120028526A1 (en) * | 2010-07-29 | 2012-02-02 | Eaton Corporation | Friction member and friction material thereof |
US8461064B2 (en) * | 2010-07-29 | 2013-06-11 | Eaton Corporation | Friction member and friction material thereof |
JP5700240B2 (ja) * | 2010-09-29 | 2015-04-15 | 三菱レイヨン株式会社 | アクリル繊維紙およびその製造方法 |
WO2012066964A1 (ja) * | 2010-11-19 | 2012-05-24 | 日立化成工業株式会社 | ノンアスベスト摩擦材組成物、これを用いた摩擦材及び摩擦部材 |
CN102796492B (zh) * | 2012-08-24 | 2014-03-12 | 朱育盼 | 一种汽车制动用摩擦材料的制备方法 |
EP2963161B8 (en) * | 2013-02-26 | 2017-08-02 | Mitsubishi Chemical Corporation | Spinning nozzle and process for producing fibrous bundle |
US9677635B2 (en) | 2013-07-29 | 2017-06-13 | Borgwarner Inc. | Friction material |
CN104087245A (zh) * | 2014-07-01 | 2014-10-08 | 北京瑞斯福高新科技股份有限公司 | 一种大轴重货车闸瓦用摩擦材料及制备方法 |
US12366275B2 (en) * | 2020-04-29 | 2025-07-22 | Schaeffler Technologies AG & Co. KG | Method for forming a double layer wet friction material with cellulose layer |
CN112324825B (zh) * | 2020-11-02 | 2024-12-10 | 摩擦一号制动科技(仙桃)有限公司 | 高摩擦性能环保型刹车片 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61120795U (ja) * | 1985-01-14 | 1986-07-30 | ||
JPH01104818A (ja) * | 1987-10-12 | 1989-04-21 | Mitsubishi Rayon Co Ltd | 高強力アクリル繊維の製造方法 |
US5472995A (en) * | 1994-08-09 | 1995-12-05 | Cytec Technology Corp. | Asbestos-free gaskets and the like containing blends of organic fibrous and particulate components |
JPH08217888A (ja) * | 1995-01-30 | 1996-08-27 | Cytec Technol Corp | 有機繊維成分と有機粒子成分のブレンド物を含む摩擦材料 |
JP2000226723A (ja) * | 1999-02-05 | 2000-08-15 | Mitsubishi Rayon Co Ltd | 極細ポリアクリロニトリル繊維及びシート状物 |
JP2001055620A (ja) * | 1999-08-11 | 2001-02-27 | Japan Exlan Co Ltd | 不織布加工に適したアクリル繊維 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH647271A5 (de) * | 1981-03-20 | 1985-01-15 | Hoechst Ag | Fixierte faeden und fasern aus acrylnitrilhomo- oder -copolymeren sowie verfahren zu ihrer herstellung. |
JPS61120795A (ja) * | 1984-11-16 | 1986-06-07 | Jujo Paper Co Ltd | 感熱記録紙 |
US5145888A (en) * | 1989-10-26 | 1992-09-08 | Gong Ke Cheng | Non asbestos ion-polyer composite friction materials |
JPH0545808A (ja) | 1991-08-21 | 1993-02-26 | Fuji Photo Film Co Ltd | ハロゲン化銀写真感光材料の処理方法 |
JP3152770B2 (ja) | 1992-12-08 | 2001-04-03 | 新神戸電機株式会社 | 薄形鉛蓄電池の製造方法 |
US5520866A (en) * | 1994-08-09 | 1996-05-28 | Cytec Technology Corp. | Process for the preparation of friction materials containing blends of organic fibrous and particulate components |
-
2001
- 2001-08-03 JP JP2001236435A patent/JP4911334B2/ja not_active Expired - Lifetime
-
2002
- 2002-07-15 KR KR10-2004-7001545A patent/KR20040022223A/ko not_active Withdrawn
- 2002-07-15 WO PCT/JP2002/007201 patent/WO2003014589A1/ja active Application Filing
- 2002-07-15 CN CNB028151798A patent/CN1258049C/zh not_active Expired - Fee Related
- 2002-07-15 US US10/483,247 patent/US7309725B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61120795U (ja) * | 1985-01-14 | 1986-07-30 | ||
JPH01104818A (ja) * | 1987-10-12 | 1989-04-21 | Mitsubishi Rayon Co Ltd | 高強力アクリル繊維の製造方法 |
US5472995A (en) * | 1994-08-09 | 1995-12-05 | Cytec Technology Corp. | Asbestos-free gaskets and the like containing blends of organic fibrous and particulate components |
JPH08217888A (ja) * | 1995-01-30 | 1996-08-27 | Cytec Technol Corp | 有機繊維成分と有機粒子成分のブレンド物を含む摩擦材料 |
JP2000226723A (ja) * | 1999-02-05 | 2000-08-15 | Mitsubishi Rayon Co Ltd | 極細ポリアクリロニトリル繊維及びシート状物 |
JP2001055620A (ja) * | 1999-08-11 | 2001-02-27 | Japan Exlan Co Ltd | 不織布加工に適したアクリル繊維 |
Also Published As
Publication number | Publication date |
---|---|
JP4911334B2 (ja) | 2012-04-04 |
US20040198866A1 (en) | 2004-10-07 |
KR20040022223A (ko) | 2004-03-11 |
CN1258049C (zh) | 2006-05-31 |
CN1539064A (zh) | 2004-10-20 |
US7309725B2 (en) | 2007-12-18 |
JP2003049884A (ja) | 2003-02-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2003014589A1 (fr) | Materiau a base de fibres pour materiau de frottement humide | |
JP5221377B2 (ja) | メタ−アラミドフィブリドを含むパラ−アラミドパルプおよびその製造方法 | |
CA1142312A (en) | Silicic acid fibers and their use | |
US4866107A (en) | Acrylic containing friction materials | |
JP4338224B2 (ja) | キトサン被覆パルプ、このパルプを使用した紙そしてそれの製造方法 | |
JP2008308776A (ja) | ポリアクリロニトリル系前駆体繊維の製造方法、炭素繊維の製造方法、および炭素繊維 | |
JP5260308B2 (ja) | ポリアレーンアゾール/木材パルプおよびその製造方法 | |
US8444814B2 (en) | Paper comprising PIPD floc and process for making the same | |
JP4183710B2 (ja) | 全芳香族ポリアミド繊維およびその製造方法 | |
US6942757B1 (en) | Process for preparing para-aromatic polyamide paper | |
JP2007246590A (ja) | 摩擦材 | |
CN114539766A (zh) | 一种柔性散热材料及其制备方法、柔性显示面板 | |
US8137506B2 (en) | Paper comprising PIPD pulp and process for making same | |
JP4862226B2 (ja) | 炭素繊維用前駆体繊維および炭素繊維の製造方法 | |
JP7538055B2 (ja) | アラミドナノファイバーを含有する複合紙構造体およびその製造方法 | |
JP5221376B2 (ja) | ポリアレーンアゾール/熱硬化性樹脂パルプおよびその製造方法 | |
JP4983709B2 (ja) | 炭素繊維前駆体繊維および炭素繊維の製造方法 | |
JP7176410B2 (ja) | メタアラミドとポリフェニレンサルファイドとを含む湿式不織布の製造方法 | |
JP2009228183A (ja) | 捲縮短繊維及びそれを含む湿式摩擦材 | |
JPH073693A (ja) | パラ系芳香族ポリアミド紙の製造方法 | |
JP5400300B2 (ja) | 捲縮繊維及びそれを用いた湿式摩擦材 | |
JP4210924B2 (ja) | フィブリル化アクリル繊維およびその製造方法並びに該繊維を含有する構造物 | |
CN115895252B (zh) | 一种芳纶浆粕、其制备方法及其应用 | |
JP5045353B2 (ja) | ポリアミド短繊維 | |
WO2023140212A1 (ja) | 炭素繊維束 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BY BZ CA CH CN CO CR CU CZ DE DM DZ EC EE ES FI GB GD GE GH HR HU ID IL IN IS KE KG KP KR KZ LK LR LS LT LU LV MA MD MG MK MW MX MZ NO NZ OM PH PL PT RO SD SE SG SI SK SL TJ TM TN TR TT UA UG US UZ VN YU ZA ZM Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LU MC NL PT SE SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ UG ZM ZW AM AZ BY KG KZ RU TJ TM AT BE BG CH CY CZ DK EE ES FI FR GB GR IE IT LU MC PT SE SK TR BF BJ CF CG CI GA GN GQ GW ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 10483247 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020047001545 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20028151798 Country of ref document: CN |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
122 | Ep: pct application non-entry in european phase |