JPH0133697B2 - - Google Patents
Info
- Publication number
- JPH0133697B2 JPH0133697B2 JP55050684A JP5068480A JPH0133697B2 JP H0133697 B2 JPH0133697 B2 JP H0133697B2 JP 55050684 A JP55050684 A JP 55050684A JP 5068480 A JP5068480 A JP 5068480A JP H0133697 B2 JPH0133697 B2 JP H0133697B2
- Authority
- JP
- Japan
- Prior art keywords
- friction
- friction material
- rubber
- powder
- asbestos
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000002783 friction material Substances 0.000 claims description 26
- 239000000843 powder Substances 0.000 claims description 25
- 239000000835 fiber Substances 0.000 claims description 17
- 239000007799 cork Substances 0.000 claims description 16
- 229920001971 elastomer Polymers 0.000 claims description 14
- 239000005060 rubber Substances 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- 229920001187 thermosetting polymer Polymers 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000003607 modifier Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000010985 leather Substances 0.000 description 10
- 239000010425 asbestos Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229910052895 riebeckite Inorganic materials 0.000 description 6
- 238000009472 formulation Methods 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 235000013311 vegetables Nutrition 0.000 description 4
- 239000004760 aramid Substances 0.000 description 3
- 229920003235 aromatic polyamide Polymers 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229920003051 synthetic elastomer Polymers 0.000 description 3
- 239000005061 synthetic rubber Substances 0.000 description 3
- 244000226021 Anacardium occidentale Species 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 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
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 235000020226 cashew nut Nutrition 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229920000271 Kevlar® Polymers 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229920000784 Nomex Polymers 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 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
- 238000000227 grinding Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004763 nomex Substances 0.000 description 1
Landscapes
- Braking Arrangements (AREA)
Description
〔産業上の利用分野〕
本発明は無石綿系（ノンアスベスト系）で軽負
荷用の摩擦材に関するものである。
本発明者らは先に無石綿系で軽負荷用の摩擦材
として動物性皮革繊維及び動物性皮革紛末のいず
れかと熱硬化性樹脂を含有する摩擦材を開発した
が（特願昭54−11305号〔特開昭55−104378号公
報〕及び特願昭54−133946号〔特開昭56−57869
号公報〕）、本発明はこの摩擦材を更に改良したも
ので、特に耐吸湿性を向上せしめたものである。
〔従来の技術〕
一般に石綿を使用する（アスベスト系）摩擦材
はその製造時に石綿粉塵による作業公害を伴い、
しかも低面圧用のクラツチフエーシングの目的に
は十分沿い得ないという欠点がある。
又ノンアスベスト系の摩擦材として従来品にコ
ルク系摩擦材があるが、これは摩耗が多くしかも
摩擦鳴音の発生が多いという欠点をもつている。
そこで本発明者は動物性皮革繊維又は動物性皮革
粉末、植物性繊維、ポリアミド繊維又は全芳香族
ポリアミド系繊維と熱硬化性樹脂からなる摩擦材
配合を混合して加熱加圧成型したことを特徴とす
る摩擦材（特願昭54−11305号〔特開昭55−
104378号公報〕）を提案し、更に摩擦係数が0.5以
上と高く、耐摩耗性がよく又摩擦鳴音がなく、し
かも相手摩擦材への影響がほとんどない摩擦材と
して動物性皮革繊維及び／又は動物性皮革粉末と
植物繊維及び／又は全ポリアミド繊維とを混在さ
せ、かつこれに無機塩類、摩擦調整剤、金属粉末
を混入させ、かつ熱硬化性樹脂を使用して摩擦材
とすることにより２Kg／cm2以下の低面圧で使用す
る場合に摩擦係数が高く（0.5以上）、耐摩耗性が
優れている等の摩擦適性を示す摩擦材（特願昭54
−133946号〔特開昭56−57869号公報〕）を提案し
た。
この摩擦材は、通常の状態での使用には全く問
題ないが、湿度が異常に高い地域又は季節におけ
る使用では、動物性皮革繊維・動物性皮革粉が大
気中の水分を吸湿し、異常に高いμレベルになつ
たり、更に吸湿した状態で長期間保管された状態
が続くと、摩擦材と相手材との間に錆が生じて固
着状態となり、始動不能となるおそれがある。
〔発明が解決しようとする問題点〕
本発明は上記の摩擦材において動物性皮革繊
維、動物性皮革粉末に代えてゴム質にて被覆した
コルク粉末を使用することによりその摩擦性能を
低下せしめることなく、耐吸湿性を大幅に改善し
たものである。
〔問題点を解決するための手段〕
本発明の要旨とする所はゴム質にて被覆したコ
ルク粉末と熱硬化性樹脂を含有する無石綿系であ
ることを特徴とする摩擦材に存するものである。
〔作 用〕
本発明の代表的な基本配合を示すと次の通りで
ある。
ゴム質にて被覆したコルク粉末 １〜40wt％
植物繊維及び／又は有機繊維 ５〜30 〃
摩擦性能調整剤 ５〜50 〃
無機塩類 ５〜30 〃
熱硬化性樹脂 ５〜30 〃
その他必要に応じ金属粉末 １〜20 〃
上記の配合をよく攪拌して混合し、所定の金型
に入れて加熱加圧成型して製品とする。
なお上記配合中、ゴム質にて被覆したコルク粉
末としては、コルク粉末をN.B.R.系又はS.B.R.
系等の合成ゴム粘稠液により被覆したものを用い
てもよいが、これらのゴム質のラテツクス液によ
り被覆したものも用いることができる。又植物繊
維としては精製した木材パルプのKC―フロツク
（商品名、山陽国策パルプ社）が使用されうる。
有機繊維としては芳香族ポリアミド繊維、具体
的にはケブラ（商品名、デユポン社）、ノーメツ
クス（商品名、デユポン社）、コーネツクス（商
品名、帝人）等のメタ型又はパラ型アラミツド繊
維を１〜６mmに切断したものが使用されうる。
摩擦性能調整剤としてはカシユーダスト、ゴム
粉末等が使用されうる。
又無機塩類としては炭酸カルシウム、炭酸マグ
ネシウム、硫酸バリウム、チタン酸カリウム等が
使用されうる。
熱硬化性樹脂はフエノール系の樹脂が一般的に
用いられるが、エポキシ系、メラミン系等の樹脂
でもよく又これらの変性樹脂も用いることができ
る。
金属粉末としてはアルミニウム粉末、銅粉末、
真鍮粉末等が用いられる。
〔実施例〕
以下に本発明の効果を一層明らかにするために
実施例を示す。
実施例
ゴム練りロール等を用いてN.B.R.系合成ゴム
の粘稠液をコルク粉末に練り込み、次いで粉末工
程を経てゴム質にて被覆したコルク粉末を調製す
る。
このゴム質にて被覆したコルク粉末及びフエノ
ール樹脂を含む下記配合を調製し、常法によつて
摩擦材を成型した。
配 合
ゴム質にて被覆したコルク粉末 25wt％
コーネツクス（３mmカツト） 10 〃
木材パルプ（KC―フロツク） 15 〃
カシユーダスト 15 〃
炭酸カルシウム 10 〃
アルミニウム粉末 ５ 〃
フエノール樹脂 20 〃
この摩擦材の摩擦性能（摩擦係数及び摩耗量）
を示すと添付図面の通りである。
尚比較のため従来のコルクフエーシングの摩耗
性能を併せて示した。
これら摩擦性能は定速式摩擦試験機によりJIS
D4311の方法によつてｐ＝３Kg／cm2、ｖ＝7.5m／
ｓの条件で行なつた。
摩擦係数は実線で示し、又摩耗量（×10-7cm3／
Kg−ｍ）は点線で示したが、これより本発明品
（〇印）は従来品（×印）よりもいずれも優れて
いた。
又本発明品の吸湿性試験を行なつた結果を下表
に示したが、比較のため本発明の配合においてゴ
ム質で被覆したコルク粉末に代えて牛皮粉砕粉を
用いた摩擦材を比較品として同様に試験した結果
を併記した。
[Industrial Application Field] The present invention relates to an asbestos-free friction material for light loads. The present inventors have previously developed a friction material containing either animal leather fiber or animal leather powder and a thermosetting resin as an asbestos-free friction material for light loads (Japanese Patent Application No. 1983- No. 11305 (Japanese Unexamined Patent Publication No. 55-104378) and Japanese Patent Application No. 54-133946 (Unexamined Japanese Patent Application No. 56-57869)
The present invention further improves this friction material, and particularly improves moisture absorption resistance. [Prior art] Friction materials that use asbestos (asbestos-based) generally involve work pollution due to asbestos dust during their manufacture.
Moreover, it has the disadvantage that it cannot satisfactorily meet the purpose of clutch facing for low surface pressure. In addition, conventional non-asbestos friction materials include cork-based friction materials, but these have the drawbacks of high wear and generation of friction noise.
Therefore, the present inventor has developed a feature in which a friction material composition consisting of animal leather fiber or animal leather powder, vegetable fiber, polyamide fiber, or wholly aromatic polyamide fiber and thermosetting resin is mixed and molded under heat and pressure. Friction material (Patent Application No. 11305, 1983)
104378]), and furthermore, we have proposed animal leather fiber and/or as a friction material that has a high friction coefficient of 0.5 or more, has good wear resistance, does not cause friction noise, and has almost no effect on the mating friction material. By mixing animal leather powder with vegetable fibers and/or all-polyamide fibers, mixing inorganic salts, friction modifiers, and metal powder, and using thermosetting resin to make a friction material, 2 kg can be obtained. A friction material that exhibits friction suitability such as a high friction coefficient (0.5 or more) and excellent wear resistance when used at low surface pressures of / cm2 or less (patent application filed in 1973).
-133946 (Japanese Unexamined Patent Publication No. 56-57869). There is no problem with this friction material when used under normal conditions, but when used in regions or seasons with abnormally high humidity, the animal leather fibers and animal leather powder absorb moisture from the atmosphere, resulting in abnormally high humidity. If the friction material reaches a high μ level or is stored for a long period of time in a moisture-absorbing state, rust may occur between the friction material and the mating material, resulting in a stuck state, which may make it impossible to start. [Problems to be Solved by the Invention] The present invention reduces the friction performance of the friction material by using cork powder coated with rubber instead of animal leather fiber or animal leather powder in the above friction material. It has significantly improved moisture absorption resistance. [Means for Solving the Problems] The gist of the present invention resides in a friction material characterized by being asbestos-free and containing cork powder coated with rubber and a thermosetting resin. be. [Function] The typical basic formulation of the present invention is as follows. Cork powder coated with rubber 1-40wt% Vegetable fibers and/or organic fibers 5-30 〃 Friction performance modifier 5-50 〃 Inorganic salts 5-30 〃 Thermosetting resin 5-30 〃 Other metals as necessary Powder 1-20 〃 The above formulation is thoroughly stirred and mixed, placed in a predetermined mold, and molded under heat and pressure to form a product. In addition, in the above formulation, the cork powder coated with rubber is NBR type or SBR type.
A material coated with a synthetic rubber viscous liquid such as a synthetic rubber may be used, but a material coated with a latex liquid of these rubbers may also be used. Further, as the vegetable fiber, KC-Flock (trade name, Sanyo Kokusaku Pulp Co., Ltd.), which is a refined wood pulp, can be used. The organic fibers include aromatic polyamide fibers, specifically meta- or para-aramid fibers such as Kevlar (trade name, DuPont), Nomex (trade name, Dupont), Cornex (trade name, Teijin), etc. A piece cut into 6 mm can be used. As the friction performance modifier, cashew dust, rubber powder, etc. can be used. Further, as inorganic salts, calcium carbonate, magnesium carbonate, barium sulfate, potassium titanate, etc. can be used. Phenol-based resins are generally used as the thermosetting resin, but epoxy-based, melamine-based, and other resins may also be used, and modified resins of these may also be used. Metal powders include aluminum powder, copper powder,
Brass powder etc. are used. [Example] Examples will be shown below to further clarify the effects of the present invention. Example A viscous liquid of NBR synthetic rubber is kneaded into cork powder using a rubber kneading roll or the like, and then a cork powder coated with rubber is prepared through a powdering process. The following formulation containing cork powder coated with this rubber material and a phenol resin was prepared, and a friction material was molded by a conventional method. Cork powder coated with compound rubber 25wt% Cornex (3mm cut) 10 〃 Wood pulp (KC-Flock) 15 〃 Cashew dust 15 〃 Calcium carbonate 10 〃 Aluminum powder 5 〃 Phenol resin 20 〃 Friction performance of this friction material ( friction coefficient and wear amount)
As shown in the attached drawing. For comparison, the wear performance of conventional cork facings is also shown. These friction performances were measured using a constant speed friction tester according to JIS standards.
By the method of D4311 p=3Kg/cm 2 , v=7.5m/
The test was carried out under the conditions of s. The coefficient of friction is shown as a solid line, and the amount of wear (×10 -7 cm 3 /
Kg-m) is shown by the dotted line, and it shows that the product of the present invention (marked with ◯) was superior to the conventional product (marked with x). The results of a hygroscopicity test for the product of the present invention are shown in the table below.For comparison, a comparison product was prepared using a friction material using crushed cowhide powder instead of cork powder coated with rubber in the formulation of the present invention. The results of a similar test are also listed.
本発明の摩擦材は石綿に代えてコルク粉末を使
用した無石綿系であるので、石綿粉塵による公害
問題がなくしかも上記のコルク粉末はゴム質にて
その全面が被覆含浸されているので、コルク摩擦
材の欠点である摩耗が多く摩擦鳴音の発生が多い
という問題が有効に解消される。
Since the friction material of the present invention is asbestos-free and uses cork powder instead of asbestos, there is no problem of pollution caused by asbestos dust.In addition, since the above-mentioned cork powder is coated and impregnated on its entire surface with rubber, cork The disadvantages of friction materials, such as high wear and frequent generation of friction noise, can be effectively solved.
第１図は本発明品と従来品の摩擦係数及び摩耗
量と温度との関係を夫々示す図表である。
〇……本発明品、×……従来品、―……摩擦係
数、‐‐‐‐……摩耗量。
FIG. 1 is a chart showing the relationship between the coefficient of friction, amount of wear, and temperature for the product of the present invention and the conventional product, respectively. 〇...Product of the present invention, ×...Conventional product, -...Friction coefficient, ---...Amount of wear.
Claims (1)
脂を含有する無石綿系であることを特徴とする摩
擦材。 ２ ゴム質にて被覆したコルク粉末１〜40wt％、
植物繊維及び／又は有機繊維５〜30wt％、摩擦
性能調整剤５〜50wt％、無機塩類５〜30wt％、
金属粉０〜20wt％、熱硬化性樹脂５〜30wt％か
らなる特許請求の範囲第１項記載の摩擦材。[Scope of Claims] 1. A friction material characterized by being asbestos-free and containing cork powder coated with rubber and a thermosetting resin. 2 1-40wt% cork powder coated with rubber,
Plant fibers and/or organic fibers 5-30wt%, friction performance modifiers 5-50wt%, inorganic salts 5-30wt%,
The friction material according to claim 1, comprising 0 to 20 wt% of metal powder and 5 to 30 wt% of thermosetting resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5068480A JPS56147879A (en) | 1980-04-17 | 1980-04-17 | Friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5068480A JPS56147879A (en) | 1980-04-17 | 1980-04-17 | Friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56147879A JPS56147879A (en) | 1981-11-17 |
| JPH0133697B2 true JPH0133697B2 (en) | 1989-07-14 |
Family
ID=12865744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5068480A Granted JPS56147879A (en) | 1980-04-17 | 1980-04-17 | Friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56147879A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0694554B2 (en) * | 1986-03-07 | 1994-11-24 | 住友電気工業株式会社 | Friction material for disk brake |
| JPS62261725A (en) * | 1986-05-09 | 1987-11-13 | Aisin Chem Co Ltd | Clutch facing |
| CN103387814B (en) * | 2013-07-30 | 2015-07-29 | 王光明 | A kind of abrasion resistance material and preparation method thereof |
| CN106321696A (en) * | 2016-08-30 | 2017-01-11 | 苏州西艾杰电机有限公司 | Low-noise friction plate for brake |
-
1980
- 1980-04-17 JP JP5068480A patent/JPS56147879A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56147879A (en) | 1981-11-17 |
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