JPH0239651B2 - - Google Patents
Info
- Publication number
- JPH0239651B2 JPH0239651B2 JP57073808A JP7380882A JPH0239651B2 JP H0239651 B2 JPH0239651 B2 JP H0239651B2 JP 57073808 A JP57073808 A JP 57073808A JP 7380882 A JP7380882 A JP 7380882A JP H0239651 B2 JPH0239651 B2 JP H0239651B2
- Authority
- JP
- Japan
- Prior art keywords
- friction
- friction material
- rock wool
- wet friction
- coefficient
- 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 - Lifetime
Links
- 239000002783 friction material Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 9
- 239000011490 mineral wool Substances 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 229920003043 Cellulose fiber Polymers 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000005909 Kieselgur Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims 2
- 239000011256 inorganic filler Substances 0.000 claims 1
- 229910003475 inorganic filler Inorganic materials 0.000 claims 1
- 239000011347 resin Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 claims 1
- 229920001187 thermosetting polymer Polymers 0.000 claims 1
- 239000000835 fiber Substances 0.000 description 9
- 239000010425 asbestos Substances 0.000 description 7
- 229910052895 riebeckite Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- 239000004129 EU approved improving agent Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 239000012784 inorganic fiber Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 244000226021 Anacardium occidentale Species 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 241000700198 Cavia Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 235000020226 cashew nut Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 231100000405 induce cancer Toxicity 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 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
- 230000013011 mating Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000002023 wood Substances 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Description
この発明は車輌の自動変速機の構成部品として
使用され、油中で作動する湿式摩擦材（以下単に
摩擦材という）に関するものである。
従来、この種の摩擦材はセルロース繊維（パル
プ）を基材とし、諸摩擦特性向上剤を配合して製
造されており、摩擦係数が高くて、良好な摩擦性
能を示し、基材のからみが良いので摩擦材の層間
剥離をも伴わず良好な摩擦材として知られてい
る。また、コストも安価で現在この種の摩擦材の
主流となつている。しかし、パルプが基材である
ためにどうしても耐熱性に劣り、摩擦係合時に発
生する熱によつて部分的な焼けを生じ、表面が凹
凸になる。かような現象が生起すると摩擦材の摩
耗が促進され、摩擦係数も減少してくる。即ち耐
久性に乏しい欠点を有する。この耐熱性の向上を
意図して当業界では種々の開発が試みられてお
り、その成果として多数の方法が提供されてい
る。その中で最も実用的なものとしては、全摩擦
材100重量部（以下部は重量部を意味する）中に
石綿繊維を５〜30％配合し、セルロース繊維の補
助基材として使用する方法が提供されている。か
ような石綿繊維を配合した摩擦材は上記セルロー
ス繊維単独のものに較べて、著るしく耐熱性を改
良し、上記不具合をほぼ解消した。しかし石綿繊
維は近年人体に非常に悪影響を与える点が指摘さ
れ、特にモルモツトの動物実験では癌を誘発する
事が立証されており、石綿弊害として問われるに
至つている。またこの石綿繊維配合摩擦材も、従
来のパルプ単独基材の摩擦材と同様に初期の摩擦
係数が低いという欠点を有する。又、ガラス繊維
や炭素繊維を石綿繊維の代替材料として使用する
方法が提供されているが、いずれも摩擦係数が低
く摩耗性が劣るため実用に供しない、
現在当業界では石綿繊維を含有せずに耐熱性が
良好で、初期の摩擦係数が高く、且つ従来のパル
プ基材摩擦材が具備している良好な特性をも損わ
ない摩擦材の開発に目が向けられている。しか
し、未だに世に提供されていない。
そこでこの発明の目的は石綿繊維を配合するこ
となく、耐熱性の良い、即ち耐摩耗性、耐久性に
すぐれた摩擦材を提供することである。
この発明の目的は特許請求の範囲に記載した事
項を実施することによつて達成される。
この発明の原理は無機繊維に属するロツクウー
ルをパルプの補助基材として配合することによ
り、耐熱性を向上させようとするものである。
この発明でいうロツクウールとは、数種の鉱石
を高熱で溶融したものを遠心力や圧縮空気で吹き
とばし、細い繊維状にした非晶質の人工無機繊維
である。このロツクウールは不燃性であり断熱性
に優れ、吸音効果が高いところから、主として建
材用として使用されている繊維である。
ロツクウールを抄紙時にパルプと諸摩擦特性向
上剤とともに配合し、常法に従つて得られた摩擦
材は本発明の目的を達成しうる極めて実用性に富
む優れた摩擦材となる。
この発明の全摩擦材100部中の各配合剤の配合
割合を述べると、ロツクウール15〜45部であり、
好ましくは30〜25部である。そしてこれらに緒摩
擦特性向上剤を15〜35部配合し、結合剤を20〜40
部含浸させる。
緒摩擦特性向上剤とは、この種の摩擦材が油中
で使用されるところから、摩擦係数が不足しやす
いので、主として摩擦係数を向上させるために配
合されるものである。また場合によつてはその他
各摩擦材の特殊な要求品質を満すために配合され
るものであり、摩擦係数を故意に下げる為に添加
する場合もある。
これら緒摩擦特性向上剤として無機物と有機物
が知られている。この無機物に属するものとして
はベンガラ、炭酸カルシウム、炭酸マグネシウ
ム、硫酸バリウム、クレー、シリカ及びケイソー
土等である。この無機物の大きさは通常粒径があ
まり大きいと相手材を係合時に傷つける等の不具
を生じるので50μ以下の粒径のものを使用すると
良い。また前記有機物とは有機カシユーダスト、
ラバーダスト及び木粉等である。
本発明の摩擦材の製法としては周知のものがい
ずれも好ましく適用でき特に制限を設けない。こ
の１例について述べると、ロツクウール、パルプ
及び緒摩擦特性向上剤を配合して抄紙した後、順
に打抜き、結合剤の含浸、風乾、乾燥炉内でプレ
キユラー、予め接着剤を塗布した芯金とともに加
圧加熱成形、アフターキユアー及び放冷後仕上げ
加工して摩擦材を得る方法が挙げられる。
実施例1.2及び比較例
The present invention relates to a wet friction material (hereinafter simply referred to as friction material) that is used as a component of an automatic transmission of a vehicle and operates in oil. Conventionally, this type of friction material has been manufactured using cellulose fibers (pulp) as a base material and mixed with various friction property improving agents, and has a high coefficient of friction, exhibits good friction performance, and has a high resistance to entanglement of the base material. It is known as a good friction material without causing any delamination of the friction material. Furthermore, it is inexpensive and is currently the mainstream of this type of friction material. However, since pulp is the base material, it inevitably has poor heat resistance, and the heat generated during frictional engagement causes local burns, resulting in uneven surfaces. When such a phenomenon occurs, wear of the friction material is accelerated and the coefficient of friction decreases. That is, it has a drawback of poor durability. Various developments have been attempted in the industry with the intention of improving this heat resistance, and many methods have been provided as a result of these efforts. The most practical method is to mix 5 to 30% asbestos fiber into 100 parts by weight of the total friction material and use it as an auxiliary base material for cellulose fibers. provided. A friction material containing such asbestos fibers has significantly improved heat resistance compared to the above-mentioned one containing only cellulose fibers, and almost eliminates the above-mentioned problems. However, in recent years, it has been pointed out that asbestos fibers have a very harmful effect on the human body, and in animal experiments on guinea pigs in particular, it has been proven that they induce cancer, and asbestos fibers have come to be questioned as a harmful effect. Furthermore, this asbestos fiber-containing friction material also has the drawback of a low initial coefficient of friction, similar to the conventional friction material based solely on pulp. In addition, methods have been proposed in which glass fibers and carbon fibers are used as substitute materials for asbestos fibers, but both have low coefficients of friction and poor abrasion properties, so they are not practical. Attention is now being paid to the development of a friction material that has good heat resistance, a high initial coefficient of friction, and does not impair the good properties of conventional pulp-based friction materials. However, it has not yet been offered to the world. Therefore, an object of the present invention is to provide a friction material that does not contain asbestos fibers and has good heat resistance, that is, excellent wear resistance and durability. The objects of the invention are achieved by carrying out the matters described in the claims. The principle of this invention is to improve heat resistance by blending rock wool, which is an inorganic fiber, as an auxiliary base material for pulp. Rock wool as used in this invention is an amorphous artificial inorganic fiber made by melting several types of ore at high heat and blowing it away using centrifugal force or compressed air to form thin fibers. Rock wool is a fiber that is mainly used as a building material because it is nonflammable, has excellent heat insulation properties, and has a high sound absorption effect. A friction material obtained by blending rock wool with pulp and various frictional property improvers during paper making in accordance with a conventional method is an excellent friction material that is highly practical and capable of achieving the objects of the present invention. The blending ratio of each compounding agent in 100 parts of the total friction material of this invention is 15 to 45 parts of rock wool,
Preferably it is 30 to 25 parts. Then, 15 to 35 parts of a friction property improver are added to these, and 20 to 40 parts of a binder is added.
Partially impregnated. The friction property improver is mainly blended to improve the friction coefficient since this type of friction material is used in oil and tends to lack the coefficient of friction. In some cases, they are also added to meet the special quality requirements of each friction material, and are sometimes added to intentionally lower the coefficient of friction. Inorganic substances and organic substances are known as friction property improving agents. Those belonging to this inorganic substance include red iron, calcium carbonate, magnesium carbonate, barium sulfate, clay, silica, and diatomaceous earth. The particle size of this inorganic material is preferably 50 μm or less because if the particle size is too large, it will cause problems such as damaging the mating material during engagement. In addition, the organic matter is organic cashew dust,
These include rubber dust and wood powder. Any well-known method can be preferably applied to the manufacturing method of the friction material of the present invention, and there are no particular limitations. To describe one example of this, after paper is made by blending rock wool, pulp, and a friction property improver, it is sequentially punched out, impregnated with a binder, air-dried, and processed in a drying oven with a pre-cured material and a core metal coated with adhesive in advance. Methods for obtaining a friction material include pressure molding, after-curing, and finishing after cooling. Example 1.2 and comparative example
【表】
上表のフエノール系樹脂を除く配合剤を個々に
配合して抄紙し、これをスタピングフシンで打抜
いて所定形状のペーパーベースを得た。これに予
め溶剤にて固形分を調合したフエノール系樹脂を
収容した含浸槽にて含浸させ、約50℃にて20分風
乾し、約160℃に保持した乾燥炉で40分間プレキ
ユアーを行つた。その後予め接着剤を塗布した芯
金とともに170℃、面圧100Kg／cm2で２分間加圧加
熱成形し、約170℃で10分間アフターキユアーし
た後、放冷後仕上げ加工を施して摩擦材完成品を
得た。これを実施例1.2及び比較例とした。
以上、実施例1.2及び比較例で得られた摩擦材
を所定の試験機にかけて試験結果を添付図に示
す。
本発明は図から明らかな如く、耐熱性が良いの
で、耐摩耗性を向上させると共に、耐久性を著る
しく向上させている。さらに本発明は従来設備も
そのまま使用でき、極めた製造容易な摩擦材を提
供している。[Table] The ingredients listed in the above table except for the phenolic resin were individually blended to make paper, and the paper was punched out with a stamping machine to obtain a paper base of a predetermined shape. This was impregnated in an impregnating tank containing a phenolic resin whose solid content had been mixed with a solvent in advance, air-dried at about 50°C for 20 minutes, and precured for 40 minutes in a drying oven maintained at about 160°C. Afterwards, it was pressurized and heated for 2 minutes at 170℃ and a surface pressure of 100Kg/cm 2 with a core metal coated with adhesive, and then after-cured for 10 minutes at about 170℃, left to cool, and finished. Got the finished product. This was used as Example 1.2 and Comparative Example. The friction materials obtained in Example 1.2 and Comparative Example above were subjected to a predetermined testing machine and the test results are shown in the attached diagram. As is clear from the figures, the present invention has good heat resistance, so it improves abrasion resistance and significantly improves durability. Furthermore, the present invention provides a friction material that is extremely easy to manufacture and can be used with conventional equipment as is.
図は本発明の摩擦材と従来の摩擦材の動摩擦係
数とサイクル数の関係を示すグラフであり、図に
於いて実施例１は−Γ−、実施例２は−●−比較
例は−×−で示している。
The figure is a graph showing the relationship between the dynamic friction coefficient and the number of cycles between the friction material of the present invention and the conventional friction material. Indicated by -.
Claims (1)
湿式摩擦材において、セルロース繊維とロツクウ
ールからなる基材と、熱硬化性樹脂と粉末充填材
とで形成され、該ロツクウールは、全摩擦材中に
15〜45重量部であることを特徴とする前記湿式摩
擦材。 ２ 粉末充填材は、粒径50μｍ以下のケイソー
土、炭酸カルシウム、硫酸バリウム等の無機充填
材である特許請求の範囲第１項記載の湿式摩擦
材。[Scope of Claims] 1. A wet friction material used as a component of an automatic transmission of a vehicle, which is formed of a base material made of cellulose fibers and rock wool, a thermosetting resin and a powder filler, and the rock wool is in all friction materials
The wet friction material is characterized in that it contains 15 to 45 parts by weight. 2. The wet friction material according to claim 1, wherein the powder filler is an inorganic filler such as diatomaceous earth, calcium carbonate, barium sulfate, etc. with a particle size of 50 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7380882A JPS58191339A (en) | 1982-04-30 | 1982-04-30 | Wet friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7380882A JPS58191339A (en) | 1982-04-30 | 1982-04-30 | Wet friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58191339A JPS58191339A (en) | 1983-11-08 |
| JPH0239651B2 true JPH0239651B2 (en) | 1990-09-06 |
Family
ID=13528828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7380882A Granted JPS58191339A (en) | 1982-04-30 | 1982-04-30 | Wet friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58191339A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7488401B2 (en) * | 2005-07-11 | 2009-02-10 | Sulzer Friction Systems (Us) Inc. | Wet-laid friction material, system and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5527380A (en) * | 1978-06-02 | 1980-02-27 | Bendix Corp | Organic abrasive material |
-
1982
- 1982-04-30 JP JP7380882A patent/JPS58191339A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5527380A (en) * | 1978-06-02 | 1980-02-27 | Bendix Corp | Organic abrasive material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58191339A (en) | 1983-11-08 |
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