JPH0252674B2 - - Google Patents
Info
- Publication number
- JPH0252674B2 JPH0252674B2 JP57066316A JP6631682A JPH0252674B2 JP H0252674 B2 JPH0252674 B2 JP H0252674B2 JP 57066316 A JP57066316 A JP 57066316A JP 6631682 A JP6631682 A JP 6631682A JP H0252674 B2 JPH0252674 B2 JP H0252674B2
- Authority
- JP
- Japan
- Prior art keywords
- parts
- tetrafluoroethylene
- weight
- copolymer
- matrix
- 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
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)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】
本発明はテトラフルオロエチレンとプロピレン
との共重合体とテトラフルオロエチレン及び／又
はテトラフルオロエチレンとエチレンとの共重合
体をマトリツクスとし耐摩耗性を改良した湿式摩
擦材に関するものである。
本発明者は先にマトリツクスとしてテトラフル
オロエチレンとの共重合体15〜65wt％にテトラ
フルオロエチレン及び／又はテトラフルオロエチ
レンとエチレンとの共重合体５〜60wt％を併用
し、かつ充填材として0.5〜8wt％のカーボンブラ
ツクを含んでいることを特徴とする湿式摩擦材並
びにテトラフルオロエチレンとプロピレンの共重
合体15〜65wt％、テトラフルオロエチレン及
び／又はテトラフルオロエチレンとエチレンとの
共重合体５〜60wt％、加硫剤、加硫促進剤、老
化防止剤１〜10wt％、メデイアルサーマルカー
ボン0.5〜8wt％及びガラス繊維及び／又はチタン
酸カリ繊維18〜75wt％からなることを特徴とす
る湿式摩擦材について開発したが、本発明はこの
湿式摩擦材の主として耐摩耗性の改良を目的とし
てなされたものである。
以下本発明を具体的に説明すると、テトラフル
オロエチレンとプロピレンとの共重合体80〜120
重量部（以下重量部は単に部と記す）に対しテト
ラフルオロエチレン及び／又はテトラフルオロエ
チレンとエチレンとの共重合体５〜50部を併用
し、耐摩耗性の向上を目的としてこれに二酸化硅
素５〜40部を混入し、更に充填材としてメデイア
ルサーマルカーボン（以下単にMT−カーボンと
略記する）20〜60部を混入し、これに加硫剤、加
硫助剤、加硫促進剤、老化防止剤、二次老化防止
剤、加硫助剤等を混入してマトリツクスとする。
このマトリツクス100部に対しガラス粉末（短
繊維）20〜100部をよく混入して生地となし、こ
の生地の二次加硫後のシヨワー硬度が94〜99とな
るように加硫成型することにより目的とする耐熱
耐油性湿式摩擦材を得ることができる。
かくて本発明によればマトリツクス中に二酸化
硅素を含有せしめることにより摩擦材の耐摩耗性
の向上を図り、かつこのマトリツクスにガラス粉
末を混合、加硫してなる製品の硬度を94〜99（シ
ヨワー硬度）にコントロールすることにより摩擦
材の摩擦係数の安定性及び耐摩耗性の向上を図る
ことができ、耐摩耗性のよい摩擦係数の安定した
耐熱耐油性ゴム系湿式摩擦材を提供するという効
果を奏する。
本発明の一般的配合と製法を示すと次の通りで
ある。
テトラフルオロエチレン・プロピレン共重合体
60〜150部
テトラフルオロエチレン及び／又はテトラフルオ
ロエチレン・エチレン共重合体 50〜60部
二酸化硅素 ５〜45部
MT−カーボン 20〜60部
加硫材、加硫促進剤、老化防止剤等 １〜15部
加工助剤 １〜20部
上記配合をゴム練りロールにて良く練込んでマ
トリツクスとした。
上記マトリツクス 100部
ガラス粉末 20〜100部
を混合してよく練り込み、その過程で試験片をと
り、二次加硫後の硬度が94〜99（シヨワー硬度）
となるようにコントロールする。
上記の練り込み混合物を薄く所定の厚みに展伸
し、所定の形状に切り取るか又は打抜き、所定の
予備処理次いで接着剤塗布をした鉄板に対し接着
と同時に加圧加熱する一次加硫に次いで二次加硫
を行い、研摩を行い又は行わずして製品とする。
実施例
マトリツクス組成
テトラフルオロエチレン・プロピレン共重合
体 120部
テトラフルオロエチレン・エチレン共重合体
40部
二酸化硅素 15部
MT−カーボン 62部
加工助剤 62部
加硫材、加硫助剤、老化防止剤 二次老化防
止剤
８部
上記マトリツクス組成物をよくゴム練ロールに
て練込みマトリツクスとした。このマトリツクス
70部とガラス繊維30部とをよくゴム練りロールに
て練込み所定の厚みに圧延し次いで所定の大きさ
に整形した。一方鉄板に所定の処理をしてから接
着剤を塗布し、60〜120℃に加熱した後直ちにこ
れに上記の整形物を載せ、該整形物に対し100
Kg／cm2の面圧（これ以上の面圧をかけてもよい）
下に170℃±５℃の温度で５分間加熱加圧する。
次いで200℃にて６時間二次加硫を行い、研摩
後実施例製品とした。このようにして得られた実
施例製品のシヨワー硬度は97であつた。
上記製品を５mmφの試験片としてこれを相手材
SK−５に押し付け下記の如き試験条件で摩擦係
数及び摩耗量の試験を行い下記の如き試験結果を
得た。又比較のため二酸化硅素を含有しない他は
同一配合、同一製法で得た比較例製品についても
同様の試験を行つた。
風 速 ３mm／秒（50mmφ中の外周）
面 圧 7.5Kg／cm2
摩擦方法 10秒摩擦、５秒休止
使用油 作動油 120℃
試験片全体が油に浸漬
試験結果
【表】DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wet friction material having improved wear resistance and having a matrix of a copolymer of tetrafluoroethylene and propylene and a copolymer of tetrafluoroethylene and/or a copolymer of tetrafluoroethylene and ethylene. It is something. The present inventor previously used 15 to 65 wt% of a copolymer with tetrafluoroethylene as a matrix, together with 5 to 60 wt% of a copolymer of tetrafluoroethylene and/or tetrafluoroethylene and ethylene, and 0.5 to 60 wt% of a copolymer of tetrafluoroethylene and ethylene as a filler. Wet friction material characterized by containing ~8wt% carbon black, 15~65wt% copolymer of tetrafluoroethylene and propylene, tetrafluoroethylene and/or copolymer of tetrafluoroethylene and ethylene 5 ~60wt%, vulcanizing agent, vulcanization accelerator, anti-aging agent 1~10wt%, medial thermal carbon 0.5~8wt%, and glass fiber and/or potassium titanate fiber 18~75wt%. The present invention was developed for a wet friction material, and the present invention was made primarily for the purpose of improving the wear resistance of this wet friction material. To specifically explain the present invention, a copolymer of tetrafluoroethylene and propylene 80 to 120
5 to 50 parts by weight of tetrafluoroethylene and/or a copolymer of tetrafluoroethylene and ethylene are used in combination with 5 to 50 parts of tetrafluoroethylene and/or a copolymer of tetrafluoroethylene and ethylene, and silicon dioxide is added to this for the purpose of improving wear resistance. Further, 20 to 60 parts of medial thermal carbon (hereinafter simply abbreviated as MT-carbon) is mixed as a filler, and to this, a vulcanizing agent, a vulcanizing aid, a vulcanizing accelerator, A matrix is prepared by mixing an anti-aging agent, a secondary anti-aging agent, a vulcanization aid, etc. By thoroughly mixing 20 to 100 parts of glass powder (short fiber) to 100 parts of this matrix to form a fabric, and vulcanizing and molding this fabric so that the shower hardness after secondary vulcanization is 94 to 99. The desired heat-resistant and oil-resistant wet friction material can be obtained. Thus, according to the present invention, the wear resistance of the friction material is improved by incorporating silicon dioxide into the matrix, and the hardness of the product obtained by mixing the matrix with glass powder and vulcanizing it is 94-99 ( By controlling the shower hardness), the stability of the friction coefficient and wear resistance of the friction material can be improved, and the objective is to provide a heat-resistant, oil-resistant, rubber-based wet friction material with good wear resistance and a stable friction coefficient. be effective. The general formulation and manufacturing method of the present invention are as follows. Tetrafluoroethylene/propylene copolymer
60-150 parts Tetrafluoroethylene and/or tetrafluoroethylene/ethylene copolymer 50-60 parts Silicon dioxide 5-45 parts MT-carbon 20-60 parts Vulcanizing agent, vulcanization accelerator, anti-aging agent, etc. 1- 15 parts Processing aid 1 to 20 parts The above formulation was thoroughly kneaded with a rubber kneading roll to form a matrix. Mix 100 parts of the above matrix and 20 to 100 parts of glass powder and knead well. During the process, a test piece is taken and the hardness after secondary vulcanization is 94 to 99 (Shower hardness).
control so that The above-mentioned kneaded mixture is thinly stretched to a predetermined thickness, cut or punched into a predetermined shape, subjected to a predetermined preliminary treatment, and then applied to an iron plate coated with an adhesive. After vulcanization, the product is prepared with or without polishing. Example matrix composition Tetrafluoroethylene/propylene copolymer 120 parts Tetrafluoroethylene/ethylene copolymer
40 parts Silicon dioxide 15 parts MT-carbon 62 parts Processing aid 62 parts Vulcanizing agent, vulcanization aid, anti-aging agent Secondary anti-aging agent 8 parts The above matrix composition is thoroughly kneaded with a rubber kneading roll to form a matrix. did. This matrix
70 parts and 30 parts of glass fiber were thoroughly kneaded with a rubber kneading roll, rolled to a predetermined thickness, and then shaped into a predetermined size. On the other hand, after applying the adhesive to an iron plate and heating it to 60 to 120°C, immediately place the above-mentioned shaped article on it, and
Surface pressure of Kg/cm 2 (more surface pressure may be applied)
Heat and pressurize at a temperature of 170°C ± 5°C for 5 minutes. Next, secondary vulcanization was performed at 200° C. for 6 hours, and after polishing, an example product was obtained. The shower hardness of the example product thus obtained was 97. Use the above product as a 5mmφ test piece and use it as a mating material.
The friction coefficient and amount of wear were tested under the following test conditions by pressing it against SK-5, and the following test results were obtained. For comparison, a similar test was also conducted on a comparative product obtained by the same formulation and manufacturing method except that it did not contain silicon dioxide. Wind speed: 3mm/sec (outer circumference of 50mmφ) Surface pressure: 7.5Kg/cm 2 Friction method: 10 seconds of friction, 5 seconds of rest Oil used: Hydraulic oil: 120℃ The entire test piece is immersed in oil Test results [Table]
Claims (1)
重合体とテトラフルオロエチレン及び／又はテト
ラフルオロエチレンとエチレンとの共重合体をマ
トリツクス主成分とし、該マトリツクス中に二酸
化硅素を含有してなることを特徴とする湿式摩擦
材。 ２ テトラフルオロエチレンとプロピレンとの共
重合体80〜120重量部とテトラフルオロエチレン
及び／又はテトラフルオロエチレンとエチレンと
の共重合体５〜50重量部からなるマトリツクス主
成分に５〜40重量部の二酸化硅素を含有せしめた
特許請求の範囲第１項記載の湿式摩擦材。 ３ マトリツクスが充填材としてメデイアルサー
マルカーボン20〜60重量部と加硫剤、加硫助剤、
加硫促進剤、老化防止剤、二次老化防止剤、加工
助剤等を含んでいる特許請求の範囲第２項記載の
湿式摩擦材。 ４ マトリツクスがテトラフルオロエチレンとプ
ロピレンとの共重合体80〜120重量部、テトラフ
ルオロエチレン及び／又はテトラフルオロエチレ
ンとエチレンとの共重合体５〜50重量部、二酸化
硅素５〜40重量部、メデイアルサーマルカーボン
20〜60重量部及び加硫剤その他の添加剤からな
り、該マトリツクス100重量部に対しガラス粉末
ないしガラス短繊維20〜100重量部を配合、加硫
してなることを特徴とする湿式摩擦材。 ５ 二次加硫後のシヨワー硬度が94〜99となる耐
熱耐油性に富む特許請求の範囲第４項記載の湿式
摩擦材。[Scope of Claims] 1 A matrix whose main components are a copolymer of tetrafluoroethylene and propylene and tetrafluoroethylene and/or a copolymer of tetrafluoroethylene and ethylene, and silicon dioxide is contained in the matrix. A wet friction material that is characterized by: 2 5 to 40 parts by weight of a matrix consisting of 80 to 120 parts by weight of a copolymer of tetrafluoroethylene and propylene and 5 to 50 parts by weight of a copolymer of tetrafluoroethylene and/or tetrafluoroethylene and ethylene. The wet friction material according to claim 1, which contains silicon dioxide. 3 The matrix contains 20 to 60 parts by weight of medial thermal carbon as a filler, a vulcanizing agent, a vulcanizing aid,
The wet friction material according to claim 2, which contains a vulcanization accelerator, an anti-aging agent, a secondary anti-aging agent, a processing aid and the like. 4 The matrix is 80 to 120 parts by weight of a copolymer of tetrafluoroethylene and propylene, 5 to 50 parts by weight of tetrafluoroethylene and/or a copolymer of tetrafluoroethylene and ethylene, 5 to 40 parts by weight of silicon dioxide, media le thermal carbon
A wet friction material comprising 20 to 60 parts by weight, a vulcanizing agent and other additives, and vulcanized by blending 20 to 100 parts by weight of glass powder or short glass fibers to 100 parts by weight of the matrix. . 5. The wet friction material according to claim 4, which has a shower hardness of 94 to 99 after secondary vulcanization and is rich in heat and oil resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6631682A JPS58183781A (en) | 1982-04-22 | 1982-04-22 | Wet friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6631682A JPS58183781A (en) | 1982-04-22 | 1982-04-22 | Wet friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58183781A JPS58183781A (en) | 1983-10-27 |
| JPH0252674B2 true JPH0252674B2 (en) | 1990-11-14 |
Family
ID=13312298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6631682A Granted JPS58183781A (en) | 1982-04-22 | 1982-04-22 | Wet friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58183781A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4745139A (en) * | 1987-02-09 | 1988-05-17 | Pdi, Inc. | Elastomeric coatings containing glass bubbles |
| JP2003238700A (en) | 2002-02-21 | 2003-08-27 | Nisshinbo Ind Inc | Non-asbestos friction material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3898361A (en) * | 1973-06-04 | 1975-08-05 | Caterpillar Tractor Co | Fluoroelastomer-based composite material |
-
1982
- 1982-04-22 JP JP6631682A patent/JPS58183781A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58183781A (en) | 1983-10-27 |
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