JPS638424A - Friction material - Google Patents
Friction materialInfo
- Publication number
- JPS638424A JPS638424A JP15168086A JP15168086A JPS638424A JP S638424 A JPS638424 A JP S638424A JP 15168086 A JP15168086 A JP 15168086A JP 15168086 A JP15168086 A JP 15168086A JP S638424 A JPS638424 A JP S638424A
- Authority
- JP
- Japan
- Prior art keywords
- sulfur
- flame
- fibers
- fiber
- friction material
- 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.)
- Granted
Links
- 239000002783 friction material Substances 0.000 title claims abstract description 39
- 239000000835 fiber Substances 0.000 claims abstract description 69
- 239000011593 sulfur Substances 0.000 claims abstract description 34
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 34
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 33
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 14
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 22
- 229920002972 Acrylic fiber Polymers 0.000 abstract description 20
- 238000010438 heat treatment Methods 0.000 abstract description 14
- 239000010425 asbestos Substances 0.000 abstract description 12
- 229910052895 riebeckite Inorganic materials 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 9
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 abstract description 8
- 238000009987 spinning Methods 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 4
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 abstract description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 abstract description 3
- 229920001577 copolymer Polymers 0.000 abstract description 3
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 abstract description 3
- 239000002904 solvent Substances 0.000 abstract description 2
- 239000002243 precursor Substances 0.000 description 10
- 239000011347 resin Substances 0.000 description 10
- 229920005989 resin Polymers 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- 238000000578 dry spinning Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000002166 wet spinning Methods 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000011550 stock solution Substances 0.000 description 3
- 125000004434 sulfur atom Chemical group 0.000 description 3
- 238000005987 sulfurization reaction Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 229920006231 aramid fiber Polymers 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
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- NJYFRQQXXXRJHK-UHFFFAOYSA-N (4-aminophenyl) thiocyanate Chemical compound NC1=CC=C(SC#N)C=C1 NJYFRQQXXXRJHK-UHFFFAOYSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- OYUNTGBISCIYPW-UHFFFAOYSA-N 2-chloroprop-2-enenitrile Chemical compound ClC(=C)C#N OYUNTGBISCIYPW-UHFFFAOYSA-N 0.000 description 1
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- XEEYSDHEOQHCDA-UHFFFAOYSA-N 2-methylprop-2-ene-1-sulfonic acid Chemical compound CC(=C)CS(O)(=O)=O XEEYSDHEOQHCDA-UHFFFAOYSA-N 0.000 description 1
- NJMYQRVWBCSLEU-UHFFFAOYSA-N 4-hydroxy-2-methylidenebutanoic acid Chemical compound OCCC(=C)C(O)=O NJMYQRVWBCSLEU-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000700198 Cavia Species 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229920000271 Kevlar® Polymers 0.000 description 1
- 206010058467 Lung neoplasm malignant Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920006282 Phenolic fiber Polymers 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 125000005907 alkyl ester group Chemical group 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
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 244000145845 chattering Species 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005183 environmental health Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 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
- 230000036541 health Effects 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 239000012210 heat-resistant fiber Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 1
- UACSZOWTRIJIFU-UHFFFAOYSA-N hydroxymethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCO UACSZOWTRIJIFU-UHFFFAOYSA-N 0.000 description 1
- GJIDOLBZYSCZRX-UHFFFAOYSA-N hydroxymethyl prop-2-enoate Chemical compound OCOC(=O)C=C GJIDOLBZYSCZRX-UHFFFAOYSA-N 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910001867 inorganic solvent Inorganic materials 0.000 description 1
- 239000003049 inorganic solvent Substances 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 201000005202 lung cancer Diseases 0.000 description 1
- 208000020816 lung neoplasm Diseases 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 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
- 239000000178 monomer Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 230000000704 physical effect Effects 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
- 239000009719 polyimide resin Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- UIIIBRHUICCMAI-UHFFFAOYSA-N prop-2-ene-1-sulfonic acid Chemical compound OS(=O)(=O)CC=C UIIIBRHUICCMAI-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/51—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof
- D06M11/55—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof with sulfur trioxide; with sulfuric acid or thiosulfuric acid or their salts
- D06M11/57—Sulfates or thiosulfates of elements of Groups 3 or 13 of the Periodic Table, e.g. alums
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Braking Arrangements (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、摩擦材、たとえば車両等のブレーキに使用さ
れる摩擦材に係り、さらに詳しくは高強度で、耐摩耗性
および耐熱性に優れたアクリル系耐炎化繊維を基材とす
る摩擦材に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a friction material, for example, a friction material used in the brakes of vehicles, etc., and more specifically to a friction material that has high strength, excellent wear resistance, and heat resistance. The present invention relates to a friction material based on flame-resistant acrylic fiber.
（従来の技術）
従来、摩擦材には石綿を基材とし、この石綿に結合剤と
滑材などの摩擦特性を向上させる各種材料を配合し、所
定の形状に賦型したものが使用されてきた。(Prior art) Conventionally, friction materials have been used that have asbestos as a base material, which is mixed with various materials that improve frictional properties such as a binder and a lubricant, and then shaped into a predetermined shape. Ta.
しかしながら、この石綿を基材とする摩擦材は、配合組
成物の分散混合工程や仕上げ工程などで粉塵化し、多量
の石綿を含有する粉塵が工場内に飛散するために、製造
に従事する従業者の健康を著しく害するという環境衛生
上の大きな問題があった。特にこの石綿がモルモットの
動物実験によって肺癌を誘発することが実証された現在
、欧米諸国においては法的にその使用が制限されるに至
り、国内においても石綿の使用は従業者が強く忌避する
ところとなってきた。However, this asbestos-based friction material turns into dust during the dispersion mixing process and finishing process of the compounded composition, and a large amount of asbestos-containing dust is scattered within the factory, making it difficult for employees engaged in manufacturing. There was a major environmental health problem that seriously harmed people's health. In particular, now that asbestos has been proven to induce lung cancer in animal experiments on guinea pigs, its use has come to be legally restricted in Western countries, and even in Japan, employees are strongly discouraged from using asbestos. It has become.
そこでこの石綿に代替する材料として、各種の繊維、た
とえば炭素繊維、スチール繊維、ガラス繊維、アラミド
繊維（″ケブラー″）、フェノール繊維および耐炎化繊
維などが提案され、これらの代替繊維の中で比重が小さ
く、柔軟で、難燃性に優れ、かつ炭素繊維に比較して製
造コストが安価なアクリル系繊維をプレカーサとして得
られるアクリル系耐炎化繊維が注目されている。そして
、特公昭５９−４４５６号公報には、アクリル系繊維を
空気中で酸化して得られる耐炎化繊維を基材としたブレ
ーキライニングが提案されている。Therefore, various fibers such as carbon fiber, steel fiber, glass fiber, aramid fiber (Kevlar), phenol fiber, and flame-resistant fiber have been proposed as materials to replace asbestos. Acrylic flame-resistant fibers, which are obtained by using acrylic fibers as a precursor, are attracting attention because they are small in size, flexible, have excellent flame retardancy, and are cheaper to manufacture than carbon fibers. Japanese Patent Publication No. 59-4456 proposes a brake lining made of flame-resistant fibers obtained by oxidizing acrylic fibers in the air.
しかし、アクリル系繊維を高温の空気中で加熱、酸化す
ることによって製造される耐炎化繊維は、繊維内部に比
較して繊維の表皮部の酸化の程度が極めて大きい不均一
な酸化構造を有しているために、機械的強度、特に引張
強度が小さく、靭性（タフネス）が低く、耐摩耗性およ
び耐熱性が悪く、たとえば１５０’Ｃ以上の高温下で長
時間使用すると、その強度を失い、摩擦材などに使用し
た場合に耐久性が十分ではないという実用性能上の問題
があった。However, flame-resistant fibers produced by heating and oxidizing acrylic fibers in high-temperature air have a non-uniform oxidation structure in which the degree of oxidation on the surface of the fibers is extremely large compared to the inside of the fibers. Because of this, its mechanical strength, especially tensile strength, is low, its toughness is low, and its wear resistance and heat resistance are poor. For example, when used for a long time at high temperatures of 150'C or higher, it loses its strength. When used as a friction material, etc., there was a problem in practical performance that the durability was insufficient.
特公昭４７−３６４６１号公報によると、アクリル系繊
維をプレカーサとして二酸化硫黄含有雰囲気中で加熱す
ることによってプレカーサよりも強力の大きい硫黄含有
耐炎化繊維が得られることが記載されている。本発明者
らはこの硫黄含有雰囲気中でのアクリル系繊維の耐炎化
によって得られる耐炎化繊維の特性および摩擦材への適
用について鋭意、検討を進めて本発明を為すに至ったも
のである。According to Japanese Patent Publication No. 47-36461, it is described that by using acrylic fiber as a precursor and heating it in an atmosphere containing sulfur dioxide, a sulfur-containing flame-resistant fiber that is stronger than the precursor can be obtained. The present inventors have diligently studied the characteristics of flame-resistant fibers obtained by flame-resistant acrylic fibers in a sulfur-containing atmosphere and their application to friction materials, and have now accomplished the present invention.
（発明の解決しようとする問題点）
本発明の目的は、高温における耐摩耗性および耐熱性に
優れ、ビビ割れを生じ難い新規摩擦材を提供するにおり
、他の目的は前記環境衛生上人きな問題のおる石綿に代
替し得る摩擦材を提供するにある。(Problems to be Solved by the Invention) An object of the present invention is to provide a new friction material that has excellent wear resistance and heat resistance at high temperatures and is less likely to cause chattering cracks. The purpose of the present invention is to provide a friction material that can replace asbestos, which has serious problems.
（問題点を解決するための手段）
このような本発明の目的は、前記特許請求の範囲に記載
したように、
硫黄含有量が少なくとも３重量％である硫黄含有アクリ
ル系耐炎化繊維を基材とする摩擦材によって達成するこ
とができる。(Means for Solving the Problems) The object of the present invention is to provide a base material made of sulfur-containing acrylic flame-resistant fiber having a sulfur content of at least 3% by weight, as described in the claims. This can be achieved by using a friction material.
本発明において、硫黄含有アクリル系耐炎化繊維は従来
の炭素繊維製造の中間体として得られる空気等の酸化性
雰囲気中で加熱することによって得られる酸化繊維とは
異なり、硫黄含有雰囲気中で加熱することによって得ら
れる硫黄含有環化構造および硫黄架橋結合などを有し、
このような構造および結合の導入によって耐炎性や芸域
的強度のみならず、耐熱性並びに靭性（タフネス）を顕
著に改良、向上せしめた耐炎化繊維である。In the present invention, sulfur-containing acrylic flame-resistant fibers are produced by heating in a sulfur-containing atmosphere, unlike oxidized fibers obtained by heating in an oxidizing atmosphere such as air, which is obtained as an intermediate in conventional carbon fiber production. It has a sulfur-containing cyclized structure and sulfur crosslinks obtained by
By introducing such structures and bonds, it is a flame-resistant fiber that has significantly improved not only flame resistance and mechanical strength, but also heat resistance and toughness.
本発明の摩擦材を構成する硫黄含有耐炎化繊維は、該繊
維中に含有される硫黄量が少なくとも３重量％（以下、
特に断らないときは％は重量％を示す）、好ましくは５
％以上であることが望ましい。すなわち硫黄含有■が３
％未満の場合は繊維としての耐熱性が低下するほか、摩
擦材としての耐久性および耐摩耗性の大巾な向上を期待
できないので好ましくない。The sulfur-containing flame-resistant fibers constituting the friction material of the present invention have a sulfur content of at least 3% by weight (hereinafter referred to as
Unless otherwise specified, % indicates weight %), preferably 5
% or more is desirable. In other words, the sulfur content ■ is 3
If it is less than %, the heat resistance of the fiber will decrease, and a significant improvement in durability and abrasion resistance as a friction material cannot be expected, which is not preferable.
本発明に用いる硫黄含有量が少なくとも３％である硫黄
含有アクリル系耐炎化繊維は、以下に詳述するように、
アクリル系繊維をプレカーサとして使用し、特定の耐炎
化工程および条件を採用するこによってはじめて製造す
ることができる繊維である。The sulfur-containing acrylic flame-resistant fiber with a sulfur content of at least 3% used in the present invention is, as detailed below,
It is a fiber that can only be produced by using acrylic fiber as a precursor and adopting specific flame-retardant processes and conditions.
そして、このアクリル系繊維は、硫黄含有雰囲気中で比
較的緩慢な反応条件下に加熱、硫化せしめ、繊維内部ま
で十分に硫黄結合が導入された内外構造差の少ない耐炎
化繊維にすることが重要でるが、このような内外構造差
の少ない、高強度の硫黄含有耐炎化繊維を製造するため
には、プレカーサのアクリル系繊維としても内外構造差
の少ない、緻密で高強度のアクリル系繊維であることが
望ましい。It is important to heat and sulfurize this acrylic fiber under relatively slow reaction conditions in a sulfur-containing atmosphere to make it a flame-resistant fiber with sufficient sulfur bonds introduced into the interior of the fiber and little difference in structure between the inside and outside. However, in order to produce high-strength sulfur-containing flame-resistant fibers with little difference in structure between the inside and outside, it is necessary to use dense, high-strength acrylic fibers with little difference in structure between the inside and outside as precursor acrylic fibers. This is desirable.
本発明の硫黄含有アクリル系耐炎化繊維の製造に使用さ
れるプレカーサ、すなわちアクリル系繊維としては、ア
クリロニトリル（以下、ＡＮという＞ＡＮ単独または少
なくとも９５モル％のＡＮと５モル％以下の該ＡＮに対
して共重合性を有するモノマ、たとえばアクリル酸、メ
タクリル酸、イタコン酸なとのカルボン酸およびそれら
の１氏扱アルキルエステル類、ヒドロキシメチルアクリ
レート、ヒドロキシエチルアクリレート、ヒドロキシメ
チルメタクリレートなどのカルボン酸の水醗基を含有す
るヒドロキシアルキルアクリレート、アクリルアミド、
メタクリルアミド、α−クロルアクリロニトリル、ヒド
ロキシエチルアクリル酸、アリルスルホン酸、メタクリ
ルスルホン酸などとの共重合体からなる繊維を例示する
ことができる。The precursor used in the production of the sulfur-containing acrylic flame-resistant fiber of the present invention, that is, the acrylic fiber, is acrylonitrile (hereinafter referred to as AN), which is used alone or in combination with at least 95 mol% of AN and 5 mol% or less of the AN. Monomers that are copolymerizable with acrylic acid, methacrylic acid, itaconic acid, and their alkyl esters; water of carboxylic acids such as hydroxymethyl acrylate, hydroxyethyl acrylate, and hydroxymethyl methacrylate hydroxyalkyl acrylate containing a radical, acrylamide,
Examples include fibers made of copolymers with methacrylamide, α-chloroacrylonitrile, hydroxyethyl acrylic acid, allylsulfonic acid, methacrylsulfonic acid, and the like.
好ましくは、その極限粘度が少なくとも１．５、ざらに
好ましくは２．０〜５．０の高重合度ＡＮ系ポリマがよ
い。Preferably, a high degree of polymerization AN-based polymer having an intrinsic viscosity of at least 1.5, more preferably 2.0 to 5.0 is preferred.
これらのＡＮ系ポリマは、ジメチルスルホキシド（ＤＭ
ＳＯ） 、ジメチルアセタミド（ＤＭＡｃ＞、ジメチル
ホルムアミド（ＤＭＦ）などの有機溶剤、塩化カルシウ
ム、塩化亜鉛、ロダンソーダなどの無機塩濃厚水溶液、
硝酸などの無機系溶剤に溶解して、ポリマ濃度が５〜２
０％の紡糸原液とし、湿式、乾式または乾・湿式紡糸法
、好ましくは乾・湿式紡糸法によって繊度が０．５〜７
デニール（ｄ）、好ましくは１〜５ｄの繊維を作成する
。These AN-based polymers are dimethyl sulfoxide (DM
SO), organic solvents such as dimethylacetamide (DMAc>, dimethylformamide (DMF)), concentrated aqueous solutions of inorganic salts such as calcium chloride, zinc chloride, and rhodan soda,
When dissolved in an inorganic solvent such as nitric acid, the polymer concentration is 5 to 2.
Using a 0% spinning stock solution, the fineness is 0.5 to 7 by wet, dry or dry/wet spinning, preferably dry/wet spinning.
Fibers are made with a denier (d), preferably 1 to 5 d.
この繊度が０，５ｄよりも小さいと、得られる耐炎化繊
維の強力が小さく、耐摩耗性の良好な摩擦材を得ること
が困難になるし、７ｄよりも大きいと、繊維断面におい
て硫化が均一な硫化処理を行うことが難しくなるので好
ましくない。If the fineness is smaller than 0.5d, the strength of the flame-resistant fibers obtained will be low, making it difficult to obtain a friction material with good wear resistance.If the fineness is larger than 7d, sulfurization will be uniform in the fiber cross section. This is not preferable because it makes it difficult to carry out proper sulfurization treatment.
特に極限粘度が２．５以上の高重合度ＡＮ系ポリマの溶
剤溶液（紡糸原液）を用いて、乾・湿式紡糸法、たとえ
ば紡糸口金面と凝固浴液面との間の距離が１〜２０ｍｍ
、好ましくは３〜１０ｍｍの範囲内に設定された該紡糸
口金孔を通して、前記紡糸原液を凝固浴に導き、得られ
た凝固繊維糸条を常法により、水洗、脱溶媒、１次延伸
、乾燥・緻密化し、１ｑられた極めて延伸性に優れてい
るａｍ糸条を１５０〜２７０’Ｃの乾熱下に１．１倍、
好ましくは１．５倍以上延伸し、全有効延伸倍率が少な
くとも１０倍、好ましくは１２倍以上であり、引張強度
が少なくとも１０ｑ／ｄ以上の高強度、高弾性率で、内
外構造差の少ない緻密な繊維を製造するのがよい。In particular, using a solvent solution (spinning stock solution) of a highly polymerized AN-based polymer with an intrinsic viscosity of 2.5 or more, dry/wet spinning methods are used, for example, when the distance between the spinneret surface and the coagulation bath liquid level is 1 to 20 mm.
The spinning dope is introduced into a coagulation bath through the spinneret hole, which is preferably set in the range of 3 to 10 mm, and the resulting coagulated fiber thread is washed with water, desolventized, primary stretched, and dried by conventional methods.・The am yarn, which has been densified and stretched by 1q and has extremely excellent drawability, is heated to 150 to 270'C by 1.1 times.
It is preferably stretched by 1.5 times or more, has a total effective stretching ratio of at least 10 times, preferably 12 times or more, has a high tensile strength of at least 10 q/d, has a high modulus of elasticity, and is dense with little difference in internal and external structures. It is better to produce fibers that are
かくして得られたアクリル系繊維プレカーサは、硫黄含
有雰囲気、たとえば二硫化炭素、硫化水素、二酸化硫黄
および硫黄ガスなどの単独または混合ガス中で加熱、硫
化されるが、好ましくは繊維断面全体が均一に硫化され
たく二重構造でない）繊維を再現性よく製造できる二酸
化硫黄を硫黄含有雰囲気として使用するのがよく、また
耐炎化温度は２５０〜４００’Ｃの温度領域で加熱、硫
化するのがよい。The acrylic fiber precursor thus obtained is heated and sulfurized in a sulfur-containing atmosphere, such as carbon disulfide, hydrogen sulfide, sulfur dioxide, and sulfur gas alone or in combination, preferably uniformly over the entire fiber cross section. It is preferable to use sulfur dioxide as the sulfur-containing atmosphere, since it can produce fibers with good reproducibility (not sulfurized and not double-structured), and it is preferable to heat and sulfurize the flameproofing temperature at a temperature range of 250 to 400'C.
この二酸化硫黄雰囲気中でのアクリル系繊維の硫化は、
空気などの通常の酸化性雰囲気にあける酸化に比較して
反応が緩慢であり、二酸化硫黄が繊維中にスムースに浸
透し、結果として硫黄原子が繊維断面全体に均一に分布
した、内外構造差のない耐炎化繊維を形成するのである
。The sulfurization of acrylic fibers in this sulfur dioxide atmosphere is
Compared to oxidation in a normal oxidizing atmosphere such as air, the reaction is slow, and sulfur dioxide penetrates into the fibers smoothly.As a result, sulfur atoms are uniformly distributed throughout the fiber cross-section, resulting in a difference in internal and external structures. This results in the formation of flame-resistant fibers.
本発明において、前記硫黄含有雰囲気、特に二酸化硫黄
雰囲気中には、窒素、酸素などの他のガスを適宜混合し
た加熱雰囲気であってもよく、特に二酸化硫黄と窒素と
の混合ガスは、二酸化硫黄を効率よく繊維と反応させる
上で有効である。この耐炎化工程の加熱は、一定温度条
件下でもよいし、昇温下でもよい。たとえば、第１段加
熱を２５０〜２９０℃の温度範囲に保たれた加熱炉中で
行い、第２段加熱を２９０〜４００℃の温度範囲内で、
かつ段階的に昇温条件に設定された加熱炉内で加熱して
繊維を硫化し、耐炎化を完結させる方法を例示すること
ができる。In the present invention, the sulfur-containing atmosphere, particularly the sulfur dioxide atmosphere, may be a heated atmosphere in which other gases such as nitrogen and oxygen are appropriately mixed, and in particular, the mixed gas of sulfur dioxide and nitrogen is sulfur dioxide. It is effective in efficiently reacting with fibers. Heating in this flameproofing step may be performed under constant temperature conditions or under elevated temperature conditions. For example, the first stage heating is performed in a heating furnace maintained at a temperature range of 250 to 290°C, and the second stage heating is performed within a temperature range of 290 to 400°C.
An example of this method is to sulfurize the fibers by heating them in a heating furnace set to a temperature increasing condition in stages to complete flame resistance.
、 また、アクリル系繊維プレカーサは、弛緩、緊張
および定長のいずれの条件下に加熱してもよいが、引張
強度の大きい耐炎化繊維を製造する上では、できるだけ
高張力下、たとえば少なくとも０゜３ ｇ／ｄ以上の張
力を与えて、加熱して繊維を硫化し、耐炎化せしめるの
がよい。In addition, the acrylic fiber precursor may be heated under any of the following conditions: relaxed, tensioned, and constant length, but in order to produce flame-resistant fibers with high tensile strength, it is preferable to heat the acrylic fiber precursor under as high a tension as possible, for example, at least 0°. It is preferable to apply a tension of 3 g/d or more and heat to sulfurize the fibers and make them flame resistant.
かくして得られる硫黄含有アクリル系繊維は、上述した
ように硫黄原子が導入されれているだけではなくて、該
硫黄原子が繊維断面全体に均一に分布した構造を有して
いるために、少なくとも３ｇ／ｄ、好ましくは４ Ｃｌ
／６以上という高強度および優れた耐熱性を示すので、
摩擦材として優れた性能、たとえば耐久性、耐摩耗性な
どを有する。The sulfur-containing acrylic fiber thus obtained not only has sulfur atoms introduced therein as described above, but also has a structure in which the sulfur atoms are uniformly distributed over the entire cross section of the fiber, so that it contains at least 3 g. /d, preferably 4Cl
It exhibits high strength of /6 or more and excellent heat resistance,
It has excellent performance as a friction material, such as durability and wear resistance.
次に上記硫黄含有アクリル系耐炎化繊維（以下、単に耐
炎化繊維という）から本発明の摩擦材を作成する方法と
しては、特に限定されるものではなく、通常の方法を適
用すればよい。たとえば、該耐炎化繊維を長さ１〜１０
ｍｍにカットし、マトリックス樹脂およびその他の添加
物と共に混合した後、成形し摩擦材にすることができる
。耐炎化繊維は上記カット繊維のみならず、フィラメン
トや紡績糸などの長繊維から各種の布帛を作成し、これ
らの布帛を摩擦材の基布としてもよいし、長繊維または
短繊維不織布を作成し、この不ＭＡ １５を摩擦材の基
布としてもよい。Next, the method for producing the friction material of the present invention from the sulfur-containing acrylic flame-resistant fiber (hereinafter simply referred to as flame-resistant fiber) is not particularly limited, and any conventional method may be used. For example, the length of the flame resistant fiber is 1 to 10
It can be cut into mm pieces, mixed with a matrix resin and other additives, and then molded into a friction material. Flame-resistant fibers include not only the cut fibers mentioned above, but also various fabrics made from long fibers such as filaments and spun yarns, and these fabrics may be used as base fabrics for friction materials, or long fibers or short fibers nonwoven fabrics may be made. , this non-MA 15 may be used as a base fabric for a friction material.
マトリックス樹脂としては、特に限定されるものではな
いが、フェノール樹脂、エポキシ樹脂、ポリイミド樹脂
、芳香族ポリエステル系樹脂、含硫黄耐熱性樹脂など耐
熱性や摩擦特性に優れた樹脂を使用するのがよい。The matrix resin is not particularly limited, but it is preferable to use resins with excellent heat resistance and frictional properties, such as phenol resins, epoxy resins, polyimide resins, aromatic polyester resins, and sulfur-containing heat-resistant resins. .
添加物としては、耐熱性を有する各種繊維類、たとえば
アラミド繊維、炭素繊維、スチール繊維、ガラス繊維、
フェノール繊維、ポリイミド繊維およびアスベストを例
示することができる。また、摩擦特性の改質を目的に各
種無機および有機充填剤、たとえば黒鉛、シリカ粉、ア
ルミナ粉、硫酸バリウム、金属粉、マイカ、クレー、炭
酸カルシウム、二硫化モリブデン、パライト、カシュダ
スト、ラバーダストなどを配合することができる。Additives include various heat-resistant fibers such as aramid fibers, carbon fibers, steel fibers, glass fibers,
Examples include phenolic fibers, polyimide fibers and asbestos. In addition, various inorganic and organic fillers such as graphite, silica powder, alumina powder, barium sulfate, metal powder, mica, clay, calcium carbonate, molybdenum disulfide, pallite, cash dust, rubber dust, etc. are used to improve friction properties. can be blended.
さらに本発明に用いる耐炎化繊維は、硫黄が含有されて
いることに基因して、マトリックス樹脂に対する接着性
に優れているために、摩擦材におけるマトリックス樹脂
の配合量を少なくすることができる。摩擦材中のマトリ
ックス樹脂は、繊維やフィラーの接着剤の役割を有する
が、通常マトリックス樹脂量が多くなるにつれて摩擦材
の耐熱性が低下し、反対に繊維やフィラーの接合力は増
大する。しかるに本発明に使用する耐炎化繊維は、マト
リックス樹脂に対する接着性に優れているので、マトリ
ック樹脂量を少なくし、摩擦材の耐熱性を大きく向上さ
せることが可能になるのである。Furthermore, the flame-resistant fiber used in the present invention has excellent adhesion to the matrix resin due to the sulfur content, so the amount of matrix resin blended in the friction material can be reduced. The matrix resin in the friction material has the role of an adhesive for the fibers and fillers, but as the amount of matrix resin increases, the heat resistance of the friction material usually decreases, and on the contrary, the bonding force between the fibers and fillers increases. However, since the flame-resistant fiber used in the present invention has excellent adhesion to matrix resin, it is possible to reduce the amount of matrix resin and greatly improve the heat resistance of the friction material.
（発明の効果）
本発明になる少なくとも３型組％の硫黄を含有する硫黄
含有アクリル系耐炎化繊維は、耐摩耗性、耐熱性および
マトリックス樹脂に対する接着性に極めて優れた繊維で
あるから、高温、たとえば少なくとも３００℃以上の温
度領域でも摩擦材としての特性を十分に発揮する。した
がって、たとえば高圧力下に短時間で回転する自動車や
各種機械のブレーキなどの回転体において、回転体の停
止時に回転体は多量の熱を発生し、高度の耐熱性が要求
されることになるが、この高速回転体に要求される高度
の耐熱性を十分に満足する摩擦材を与えるのである。(Effects of the Invention) The sulfur-containing acrylic flame-resistant fiber containing at least 3% sulfur according to the present invention is a fiber with extremely excellent abrasion resistance, heat resistance, and adhesion to matrix resin, so it can be used at high temperatures. For example, it fully exhibits its properties as a friction material even in a temperature range of at least 300°C or higher. Therefore, for example, in rotating bodies such as the brakes of automobiles and various machines that rotate under high pressure for a short time, the rotating body generates a large amount of heat when it stops, and a high degree of heat resistance is required. This provides a friction material that fully satisfies the high degree of heat resistance required for this high-speed rotating body.
このような本発明の摩擦材は上記自動車のディスクパッ
ド、ブレーキライニング材料、クラッチなどのみならず
、一般産業用の摩擦材として極めて有用である。 以下
、実施例により本発明の効果をざらに具体的に説明する
。Such a friction material of the present invention is extremely useful not only for the above-mentioned automobile disc pads, brake lining materials, clutches, etc., but also as a friction material for general industrial use. EXAMPLES Hereinafter, the effects of the present invention will be explained in detail using Examples.
なお、本発明において、摩擦特性、耐熱性は次の測定法
により測定した値である。In the present invention, the frictional properties and heat resistance are values measured by the following measuring method.
摩擦特性：
耐炎化繊維を基材とする板状の摩擦材を鈴木式摩耗試験
機を用いて、荷重１０Ｋｇ／ｃｍ２、周速度１００ｍ／
ｍ ｉ ｎ、温度２５０℃、および３５０℃で摩耗した
時の摩擦係数と摩耗量を求め、現行素材のアスベストの
摩耗量を１００とし、その相対値を以て表示した。Friction properties: A plate-shaped friction material based on flame-resistant fiber was tested using a Suzuki abrasion tester at a load of 10 kg/cm2 and a circumferential speed of 100 m/cm.
The friction coefficient and amount of wear when worn at temperatures of 250° C. and 350° C. were determined, and the amount of wear of asbestos, the current material, was assumed to be 100, and the relative values were expressed.
耐熱性：
耐炎化繊維を１８０℃の空気中に弛緩状態で１０日間加
熱した後の強力保持率（％）をもって示した。Heat resistance: The strength retention rate (%) is shown after flame-resistant fibers are heated in air at 180° C. for 10 days in a relaxed state.
実施例１
アクリロニトリル（ＡＮ＞９９．７モル％とイタコン酸
０．３モル％からなる極限粘度が３．２のＡＮ系共重合
体をジメチルスルホキシド（ＤＭＳＯ）に溶解し、得ら
れた紡糸原液を乾・湿式紡糸法によって紡糸し、延伸、
熱処理などの１変処理を施して、強度が１１．３Ω／ｄ
、伸度１３％のアクリル系繊維を得た。このアクリル系
繊維をプレカーサとして３００ ’Ｃの亜硫酸ガス中で
４０分間加熱し、第１表に示した硫黄含有アクリル系耐
炎化繊維を）ｑた。Example 1 An AN-based copolymer with an intrinsic viscosity of 3.2 consisting of acrylonitrile (AN>99.7 mol% and 0.3 mol% itaconic acid) was dissolved in dimethyl sulfoxide (DMSO), and the resulting spinning stock solution was Spun by dry/wet spinning method, stretched,
After undergoing one-change treatment such as heat treatment, the strength is 11.3Ω/d.
, an acrylic fiber with an elongation of 13% was obtained. This acrylic fiber was heated as a precursor in sulfur dioxide gas at 300'C for 40 minutes to obtain the sulfur-containing acrylic flame-resistant fiber shown in Table 1).
この耐炎化繊維を約１ｍｍにカットし、該耐炎化繊維、
フェノール系樹脂およびＣａＣ○３フィラーを容積比率
で５７：２５：１８で混合し、この配合物を金型に入れ
、１８０’Ｃ１２００Ｋｃ＋／Ｃｍ２の条件下にホット
プレスして成形した後、得られた成型品の表面を研磨し
６００番のサンドペーパー（水有り状態）で仕上げて水
洗、屹燥して摩擦材を作成した。This flame-resistant fiber is cut into approximately 1 mm, and the flame-resistant fiber is
The phenolic resin and CaC○3 filler were mixed in a volume ratio of 57:25:18, this mixture was put into a mold, and the mixture was hot-pressed and molded under the conditions of 180'C1200Kc+/Cm2. The surface of the molded product was polished and finished with No. 600 sandpaper (with water), washed with water, and dried to create a friction material.
この摩擦材の摩擦係数、摩耗量などの摩擦特性を同じく
第１表に示した。The friction characteristics of this friction material, such as the friction coefficient and amount of wear, are also shown in Table 1.
比較例１〜３
実施例１において、亜硫酸ガス中での加熱条件を２５０
℃、３０分とした以外同様に加熱焼成して、第１表に示
す繊維特性を有する硫黄含有アクリル系耐炎化繊維を作
成した。Comparative Examples 1 to 3 In Example 1, the heating conditions in sulfur dioxide gas were changed to 250
A sulfur-containing acrylic flame-resistant fiber having the fiber properties shown in Table 1 was prepared by heating and firing in the same manner except that the temperature was 30 minutes.
また、同じ〈実施例１のアクリル系繊維を２５０℃、９
０分、空気中で加熱、酸化し、第１表に示す物性を有す
る耐炎化繊維を作成した。In addition, the same acrylic fiber of Example 1 was heated at 250°C at 9°C.
The mixture was heated and oxidized in air for 0 minutes to produce flame-resistant fibers having the physical properties shown in Table 1.
上記耐炎化繊維および市販のアスベストを用いて、実施
例１と同様にして摩擦材を作成した後、それらの摩擦係
数、摩耗量などの摩擦特性を測定した。その結果を第１
表に示した。Friction materials were prepared in the same manner as in Example 1 using the flame-resistant fibers and commercially available asbestos, and then their friction properties such as friction coefficient and amount of wear were measured. The result is the first
Shown in the table.
第１表から、本発明の摩擦材は、摩擦材を構成する硫黄
含有アクリル系耐炎化繊維の高い引張強度と耐熱性を反
映して、アスベストや従来の耐炎化（酸化）繊維からな
る摩擦材に比較して優れた摩擦特性を有する摩擦材であ
ることが判る。From Table 1, the friction material of the present invention is a friction material made of asbestos and conventional flame-resistant (oxidized) fibers, reflecting the high tensile strength and heat resistance of the sulfur-containing acrylic flame-resistant fibers that constitute the friction material. It can be seen that this is a friction material with superior friction properties compared to .
Claims (1)
アクリル系耐炎化繊維を基材とする摩擦材。(1) A friction material based on a sulfur-containing acrylic flame-resistant fiber having a sulfur content of at least 3% by weight.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15168086A JPS638424A (en) | 1986-06-30 | 1986-06-30 | Friction material |
| DE19873783423 DE3783423T2 (en) | 1986-04-14 | 1987-04-09 | COMPOSITE REINFORCED WITH SULFATED ACRYLIC FIBERS. |
| EP87902710A EP0263884B1 (en) | 1986-04-14 | 1987-04-09 | Composite material reinforced with sulfurized acrylic fibers |
| PCT/JP1987/000219 WO1987006276A1 (en) | 1986-04-14 | 1987-04-09 | Sulfurized acrylic fibers with high strength and high toughness, process for their preparation, and composite material comprising them |
| US07/412,563 US5502090A (en) | 1986-04-14 | 1989-09-25 | High tenacity and high toughness acrylic sulfide fibers, a process for production thereof, and composite materials prepared by using it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15168086A JPS638424A (en) | 1986-06-30 | 1986-06-30 | Friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS638424A true JPS638424A (en) | 1988-01-14 |
| JPH0355497B2 JPH0355497B2 (en) | 1991-08-23 |
Family
ID=15523905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15168086A Granted JPS638424A (en) | 1986-04-14 | 1986-06-30 | Friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS638424A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010150391A (en) * | 2008-12-25 | 2010-07-08 | Akebono Brake Ind Co Ltd | Wet friction material |
-
1986
- 1986-06-30 JP JP15168086A patent/JPS638424A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010150391A (en) * | 2008-12-25 | 2010-07-08 | Akebono Brake Ind Co Ltd | Wet friction material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0355497B2 (en) | 1991-08-23 |
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