JPH0730862B2 - Brake hose - Google Patents
Brake hoseInfo
- Publication number
- JPH0730862B2 JPH0730862B2 JP1192402A JP19240289A JPH0730862B2 JP H0730862 B2 JPH0730862 B2 JP H0730862B2 JP 1192402 A JP1192402 A JP 1192402A JP 19240289 A JP19240289 A JP 19240289A JP H0730862 B2 JPH0730862 B2 JP H0730862B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber layer
- layer
- epdm
- thread
- inner tube
- 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 - Fee Related
Links
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、内管ゴム層、下糸補強糸層、中間ゴム層、上
糸補強糸層および外皮ゴム層を備えたブレーキホース
（以下「BH」と略す。）に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a brake hose including an inner tube rubber layer, a lower thread reinforcing thread layer, an intermediate rubber layer, an upper thread reinforcing thread layer and an outer rubber layer (hereinafter, referred to as “brake hose”). Abbreviated as "BH").
下記に、本明細書にでてくる略号および各物性試験の方
法を説明しておく。The abbreviations used in this specification and the methods for each physical property test are described below.
（１）ゴム略号： NR…天然ゴム、 EPDM…エチレンプロピレンゴム（硫黄加硫可能タイ
プ）、 IIR…ブチルゴム、 SBR…スチレンブタジエンゴム、 （２）配合量の単位を示す「部」は、「重量部」を意味
する。(1) Rubber abbreviation: NR ... Natural rubber, EPDM ... Ethylene propylene rubber (sulfur vulcanizable type), IIR ... Butyl rubber, SBR ... Styrene butadiene rubber, (2) “Part” indicating the unit of compounding amount is “weight” Means "part."
（３）シート水分透過性試験： 各ゴム配合物で加硫成形（条件:175℃×10min）した各
所定厚のシートでブレーキ液（20g）が入つている容器
（容量:20cm3、開口面積:10cm2）を密封し、この容器を
水中に24時間浸漬して、ブレーキ液の重量変化を計測し
た。該変化量を開口面積で割つて、単位面積当りの透水
量（mg/cm2）を試験結果とした。(3) Sheet moisture permeability test: A container (volume: 20 cm 3 , opening area) containing a brake fluid (20 g) with a sheet of each specified thickness that was vulcanized and molded (conditions: 175 ° C x 10 min) with each rubber compound. 10 cm 2 ) was sealed, and this container was immersed in water for 24 hours, and the weight change of the brake fluid was measured. The change amount was divided by the opening area, and the amount of water permeation per unit area (mg / cm 2 ) was used as the test result.
（４）ホース水分透過性試験： 各被試験ホース（長さ:305cm）へブレーキ液を充満させ
て、両端を盲口金で塞ぎ、ホースを湾曲（曲率半径:37.
5cm）させ、両端口金を水面から突出させた状態で、蒸
留水（70℃）中に３日間浸漬後、上記（３）と同様にし
て、ブレーキ液の重量変化を計測した。該変化量をホー
ス長さで割つて単位長さ当りの透水量（mg/10cm）を試
験結果とした。(4) Hose moisture permeability test: Each hose to be tested (length: 305 cm) was filled with brake fluid, both ends were closed with blind caps, and the hose was curved (radius of curvature: 37.
5 cm), and with both end caps protruding from the water surface, the pieces were immersed in distilled water (70 ° C.) for 3 days, and the weight change of the brake fluid was measured in the same manner as in (3) above. The amount of water permeation (mg / 10 cm) per unit length was taken as the test result by dividing the amount of change by the length of the hose.
（５）振動疲労試験（ホイツプ試験）： JIS−Ｄ−2601に準じて行なつた。即ち、ホース自由長3
35mmであるBHを用い、かつ、該BHに水圧（15.8〜17.5kg
/cm2）を負荷した状態で、回転ヘツドを回転（800rpm）
させてBHを振動させ、水圧低下が発生する時間（ｈ）を
測定して試験結果とした。(5) Vibration Fatigue Test (Whipped Test): The test was performed according to JIS-D-2601. That is, hose free length 3
BH of 35 mm is used, and water pressure (15.8 to 17.5 kg) is applied to the BH.
/ cm 2 ), rotating the rotating head (800 rpm)
Then, the BH was vibrated, and the time (h) at which water pressure drop occurred was measured and used as the test result.
＜従来の技術＞ 第１図に、BHの構成例の一例を示す。<Prior Art> FIG. 1 shows an example of a BH configuration example.
内管ゴム層１、下糸補強糸層３、中間ゴム層５、上糸補
強糸層７および外皮ゴム層９からなる構成である。そし
て、従来は、内管ゴム層１は、耐ブレーキ液性の良好な
スチレンブタジエンゴム（SBR）を、中間ゴム層５は耐
摩耗性が良好で動的ばね定数の低い天然ゴム（NR）を、
外皮ゴム層９は、耐候性の良好なクロロプレンゴム（C
R）を使用して押出により成形していた。そして、下糸
・上糸補強糸層３、７は、それぞれ、前記押出された内
管ゴム層１上または中間ゴム層５上にポリビニルアルコ
ール（一般名：ビニロン）、レーヨン、ポリエステル等
の繊維からなる補強糸を編組機を使用して編み上げして
形成していた。（特開昭63−303289号公報第１頁右欄下
３行〜第２頁左欄第７行参照）。The inner tube rubber layer 1, the lower thread reinforcing thread layer 3, the intermediate rubber layer 5, the upper thread reinforcing thread layer 7 and the outer rubber layer 9 are provided. Conventionally, the inner tube rubber layer 1 is made of styrene-butadiene rubber (SBR) having good brake fluid resistance, and the intermediate rubber layer 5 is made of natural rubber (NR) having good wear resistance and a low dynamic spring constant. ,
The outer rubber layer 9 is made of chloroprene rubber (C
R) was used for molding. The lower thread / upper thread reinforcing thread layers 3 and 7 are made of fibers such as polyvinyl alcohol (general name: vinylon), rayon, polyester, etc. on the extruded inner tube rubber layer 1 or the intermediate rubber layer 5, respectively. The reinforcing yarn was formed by braiding it using a braiding machine. (See JP-A-63-303289, page 1, right column, lower line 3 to page 2, left column, line 7).
他方、昨今、水による金属配管内の錆発生およびブレー
キ液変質を抑制する等の見地から、耐水分透過性の向上
要求が増大してきている。On the other hand, recently, from the standpoint of suppressing the generation of rust in the metal pipe due to water and the deterioration of the brake fluid, there is an increasing demand for improvement in water permeation resistance.
このため、上記各所要物性を具備し、かつ、上記各ゴム
材料に比して、耐水分透過性が優れているゴム材料で各
ゴム層を形成することが検討され、かつ、上市されてい
る。Therefore, forming each rubber layer with a rubber material which has the above-mentioned required physical properties and is more excellent in moisture permeation resistance than the above-mentioned rubber materials has been studied and put on the market. .
例えば、内管ゴム層１および外皮ゴム層９はEPDMで、中
間ゴム層５はIIRまたはEPDMでそれぞれ形成する。For example, the inner tube rubber layer 1 and the outer rubber layer 9 are formed of EPDM, and the intermediate rubber layer 5 is formed of IIR or EPDM.
なお、本発明の特許性に影響を及ぼすものはないが、中
間ゴム層を有する補強糸層二層タイプのBHに関連する先
行技術として、上記公報の他に、特開昭51−63015、53
−5805、55−2805号公報等がある。It should be noted that, although it does not affect the patentability of the present invention, as a prior art relating to a reinforcing yarn layer two-layer type BH having an intermediate rubber layer, in addition to the above publication, JP-A-51-63015, 53
-5805, 55-2805 and the like are available.
＜発明が解決しようとする課題＞ しかし、これら、IIRまたはEPDMのゴム配合物で中間ゴ
ム層を形成した場合は、BHの耐動的疲労性（ホイツプ寿
命）が、NR配合物で中間ゴム層を形成した場合に比して
劣ることが分つている（第４図参照）。<Problems to be Solved by the Invention> However, when the intermediate rubber layer is formed of these IIR or EPDM rubber compounds, the dynamic fatigue resistance (whit life) of BH is not as high as that of the NR compound. It is known that it is inferior to the case where it is formed (see FIG. 4).
その理由は、断定できないが、IIRまたはEPDMは、NRに
比して、耐摩耗性が良好でなく、動的ばね定数も相対的
に高いため、ホイツプ時に、発生する上糸・下糸補強糸
層の間のずれ運動等を緩衝する作用を十分奏することが
できず、上糸・下糸補強糸層の摩耗を効果的に防ぐこと
ができるものと推定される。The reason cannot be determined, but IIR or EPDM has poor wear resistance and relatively high dynamic spring constant compared to NR. It is presumed that the effect of buffering the displacement movement between the layers cannot be sufficiently exerted, and the wear of the upper thread / lower thread reinforcing thread layers can be effectively prevented.
他方、NR層は、一般的に、EPDM層より耐水分透過性に劣
るとするのが、当業者の常識であつた。On the other hand, it was a common knowledge of those skilled in the art that the NR layer is generally inferior in moisture permeation resistance to the EPDM layer.
本発明は、上記にかんがみて、耐動的疲労性および耐水
分透過性の双方においてバランスの取れた特性をを示す
BHを提供することを目的とする。In view of the above, the present invention exhibits balanced properties in both dynamic fatigue resistance and moisture permeation resistance.
The purpose is to provide BH.
＜課題を解決するための手段＞ 本発明のBHは、内管ゴム層、下水補強糸層、中間ゴム
層、上糸補強糸層および外皮ゴム層からなるブレーキホ
ースにおいて、内管ゴム層をEPDM配合物で形成し、中間
ゴム層をNR配合物で肉厚0.1〜0.5mmに形成し、外皮ゴム
層をEPDM配合物で形成することにより、上記課題を解決
するものである。<Means for Solving the Problems> BH of the present invention is a brake hose comprising an inner tube rubber layer, a sewage reinforcing thread layer, an intermediate rubber layer, an upper thread reinforcing thread layer and an outer rubber layer, and the inner tube rubber layer is made of EPDM. The above problem is solved by forming the intermediate rubber layer with an NR compound to a wall thickness of 0.1 to 0.5 mm and forming the outer rubber layer with an EPDM compound.
＜実施例＞ 以下、本発明を実施例に基づいて詳細に説明をする。既
述例と同一部分については同一図符号を付して、その説
明の全部又は一部を省略する。<Examples> Hereinafter, the present invention will be described in detail based on Examples. The same parts as those in the above-described example are designated by the same reference numerals, and the whole or part of the description will be omitted.
本発明の構造的構成は、従来例と略同一で、第１図に示
す如く、内管ゴム層１、下糸補強糸層３、中間ゴム層5
A、上糸補強糸層７および外皮ゴム層９からなる構成で
ある。そして、各ゴム層が下記各要件を具備している。The structural constitution of the present invention is substantially the same as that of the conventional example, and as shown in FIG. 1, the inner tube rubber layer 1, the lower yarn reinforcing yarn layer 3 and the intermediate rubber layer 5 are provided.
A, the upper yarn reinforcing yarn layer 7 and the outer rubber layer 9 are used. Then, each rubber layer has the following requirements.
（１）内管ゴム層１は、EPDM配合物で形成されている。
第１表にEPDM配合物の具体例を示す。この内管ゴム層１
の肉厚は、通常、1mm前後とする。(1) The inner tube rubber layer 1 is formed of an EPDM compound.
Table 1 shows specific examples of EPDM formulations. This inner tube rubber layer 1
The wall thickness of is usually around 1 mm.
（２）中間ゴム層5Aは、NR配合物で、肉厚0.1〜0.5mmに
形成されている。第２表にNR配合物の具体例を示す。中
間ゴム層5Aの肉厚が、0.1mm未満では、下糸・上糸補強
糸層3,7の間の緩衝作用を奏し難いとともに、薄層の形
成が困難であり、また、0.5mmを超えるとホース外径が
大きくなるとともに、EPDMを使用した場合に比して同等
以上の耐水分透過性を得ることができない。(2) The intermediate rubber layer 5A is made of NR and is formed to have a wall thickness of 0.1 to 0.5 mm. Table 2 shows specific examples of NR formulations. If the thickness of the intermediate rubber layer 5A is less than 0.1 mm, the cushioning action between the lower thread / upper thread reinforcing thread layers 3 and 7 is difficult to be achieved, and it is difficult to form a thin layer, and the thickness exceeds 0.5 mm. And the outer diameter of the hose becomes large, and it is not possible to obtain the same or more moisture permeation resistance as compared with the case of using EPDM.
なお、NR配合物（第２表）で形成したゴムシートは、EP
DM配合物（第１表）で形成したゴムシートに比して、意
外にも、肉厚が0.5mm以下の範囲では耐水分透過性につ
いて、同等以上を示すことが、本発明者らが行なつたシ
ート水分透過性試験の結果から判明している（第２図参
照）。The rubber sheet made of NR compound (Table 2) is EP
Surprisingly, the present inventors have found that, in comparison with the rubber sheet formed of the DM compound (Table 1), the water permeation resistance is equivalent or higher in the range of the wall thickness of 0.5 mm or less. It is known from the results of the moisture permeability test of the Natsuta sheet (see FIG. 2).
（３）外皮ゴム層７は、EPDM配合物で形成されている。
具体的には、第３表に示すものを使用可能である。ま
た、この内管ゴム層１の肉厚は、通常、1mm前後とす
る。(3) The outer rubber layer 7 is made of an EPDM compound.
Specifically, those shown in Table 3 can be used. The wall thickness of the inner tube rubber layer 1 is usually about 1 mm.
ゴムホースの構成は、上記のものに限られず、外皮ゴム
層および／又は内管ゴム層を多層で形成した構成のもの
にも、本発明はその技術的範囲内で適用可能である。The structure of the rubber hose is not limited to the above, and the present invention can be applied to the structure in which the outer rubber layer and / or the inner rubber layer is formed in multiple layers within the technical scope thereof.
＜発明の作用・効果＞ 本発明のブレーキホースは、内管ゴム層、下糸補強糸
層、中間ゴム層、上糸補強糸れおよび外皮ゴム層からな
るブレーキホースにおいて、中間ゴム層を内管ゴム層を
EPDM配合物で形成し、中間ゴム層をNR配合物で肉厚0.1
〜0.5mmに形成し、外皮ゴム層をEPDM配合物で形成した
構成により、下記作用・効果を奏する。<Operations and Effects of the Invention> The brake hose of the present invention is a brake hose including an inner tube rubber layer, a lower thread reinforcing thread layer, an intermediate rubber layer, an upper thread reinforcing thread and an outer rubber layer, wherein the intermediate rubber layer is an inner tube. Rubber layer
Formed with EPDM compound, the intermediate rubber layer is NR compound with a wall thickness of 0.1
With the structure in which the outer rubber layer is formed to be 0.5 mm and the outer rubber layer is formed of the EPDM compound, the following actions and effects are exhibited.
BHがホイツプ運動を受けても、中間ゴム層がNR配合物か
らなるため、両補強糸層の疲労が促進されない。また、
中間ゴム層の肉厚が本発明の数値範囲内においては、NR
配合物で形成しても、EPDM配合物で形成した場合と同等
またはそれ以上の耐水分透過性を示す。従つて、耐動的
疲労性および耐水分透過性のバランスの取れたBHを提供
可能となる。Even if the BH undergoes a whip motion, the fatigue of both reinforcing yarn layers is not promoted because the intermediate rubber layer is made of the NR compound. Also,
When the thickness of the intermediate rubber layer is within the numerical range of the present invention, NR
When formed with the formulation, it exhibits moisture permeation resistance equal to or better than that formed with the EPDM formulation. Therefore, it becomes possible to provide BH having a well-balanced dynamic fatigue resistance and moisture permeation resistance.
なお、本発明の効果を確認するために、第５表に示す仕
様のBHを調整し、各BHについて、ホース水分透過性試験
および振動疲労試験（ホイツプ試験）を行なつた（いず
れも前記した方法）。それらの結果を示す第３・４図か
ら、本発明のBH（実施例）は、各比較例に比して、耐水
分透過性および耐動的疲労性においてバランスのとれた
特性に示すことが分る。In order to confirm the effect of the present invention, the BH of the specifications shown in Table 5 was adjusted, and a hose moisture permeability test and a vibration fatigue test (whipped test) were performed for each BH (both described above. Method). From FIGS. 3 and 4 showing the results, it can be seen that BH (Example) of the present invention shows balanced properties in moisture permeation resistance and dynamic fatigue resistance as compared with each Comparative Example. It
第１図は本発明を適用するBHの半断面図である。 第２図は各ゴムシートの水分透過性試験の結果を示すグ
ラフ図、 第３図は各BHのホース水分透過性試験の結果を示すグラ
フ図、 第４図は各BHの耐動的疲労性試験の結果を示すグラフ図
である。 １……内管ゴム層、 ３……下糸補強糸層、 5,5A……中間ゴム層、 ７……上糸補強糸層、 ９……外皮ゴム層。FIG. 1 is a half sectional view of a BH to which the present invention is applied. 2 is a graph showing the results of the moisture permeability test of each rubber sheet, FIG. 3 is a graph showing the results of the hose moisture permeability test of each BH, and FIG. 4 is a dynamic fatigue resistance test of each BH. It is a graph which shows the result of. 1 ... Inner tube rubber layer, 3 ... Lower thread reinforcing thread layer, 5,5A ... Intermediate rubber layer, 7 ... Upper thread reinforcing thread layer, 9 ... Outer rubber layer.
Claims (1)
上糸補強糸層および外皮ゴム層からなるブレーキホース
において、 前記内管ゴム層がEPDM配合物で形成され、 前記中間ゴム層がNR配合物で、肉厚0.1〜0.5mmに形成さ
れ、 前記外皮ゴム層がEPDM配合物で形成されている、 ことを特徴とするブレーキホース。1. An inner tube rubber layer, a lower thread reinforcing thread layer, an intermediate rubber layer,
A brake hose comprising an upper thread reinforcing thread layer and an outer rubber layer, wherein the inner rubber layer is formed of EPDM compound, the intermediate rubber layer is formed of NR compound, and the wall thickness is 0.1 to 0.5 mm. A brake hose, wherein the rubber layer is formed of an EPDM compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1192402A JPH0730862B2 (en) | 1989-07-25 | 1989-07-25 | Brake hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1192402A JPH0730862B2 (en) | 1989-07-25 | 1989-07-25 | Brake hose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0356787A JPH0356787A (en) | 1991-03-12 |
| JPH0730862B2 true JPH0730862B2 (en) | 1995-04-10 |
Family
ID=16290719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1192402A Expired - Fee Related JPH0730862B2 (en) | 1989-07-25 | 1989-07-25 | Brake hose |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0730862B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009118091A (en) * | 2007-11-05 | 2009-05-28 | Panasonic Corp | Portable wireless device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5997379A (en) * | 1982-11-22 | 1984-06-05 | 東海ゴム工業株式会社 | Water hose for automobile |
| JPS61206888A (en) * | 1985-03-08 | 1986-09-13 | 豊田合成株式会社 | High-pressure rubber hose |
| JPS63303289A (en) * | 1987-06-04 | 1988-12-09 | 日立電線株式会社 | Low permeable brake hose |
-
1989
- 1989-07-25 JP JP1192402A patent/JPH0730862B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0356787A (en) | 1991-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5084314A (en) | Refrigerant transporting hose having phenolic resin layer | |
| US4842024A (en) | Composite hose for conveying refrigerant fluids in automotive air-conditioned systems | |
| JPH0140391Y2 (en) | ||
| EP0559169B1 (en) | Reinforcing hose | |
| JPH11170823A (en) | Pneumatic radial tire for heavy load | |
| JP2011105076A (en) | Pneumatic tire for heavy load and method of manufacturing the same | |
| JP2005114135A (en) | Reinforced hose | |
| MXPA01001935A (en) | Brake hose. | |
| JPH0730862B2 (en) | Brake hose | |
| USRE31047E (en) | Hose structure | |
| JPS6229242Y2 (en) | ||
| WO2002050450A1 (en) | Shock absorber for car | |
| US6009910A (en) | Refrigerant transporting hose | |
| US4550478A (en) | Two-ply spinning cots | |
| JPH11245611A (en) | Tire | |
| JPS60179538A (en) | Gas charged spring | |
| JP2611283B2 (en) | High loss rubber composition for seismic isolation | |
| JP2002048274A (en) | High-pressure rubber hose | |
| JP2003130260A (en) | Low permeable hose | |
| CN209781894U (en) | PVC solid wall pipe | |
| JPH0624326A (en) | Hydraulic brake hose for automobile | |
| JPH018788Y2 (en) | ||
| JPH0140392Y2 (en) | ||
| JP2002174373A (en) | Refrigerant transporting rubber hose | |
| WO2003060005A1 (en) | Vibration-damping composition and vibration-damping structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080410 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090410 Year of fee payment: 14 |
|
| LAPS | Cancellation because of no payment of annual fees |