JPH02256989A - Heat resisting hose - Google Patents
Heat resisting hoseInfo
- Publication number
- JPH02256989A JPH02256989A JP7747389A JP7747389A JPH02256989A JP H02256989 A JPH02256989 A JP H02256989A JP 7747389 A JP7747389 A JP 7747389A JP 7747389 A JP7747389 A JP 7747389A JP H02256989 A JPH02256989 A JP H02256989A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- heat
- hose
- reinforcing
- resistant
- 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
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 63
- 239000000835 fiber Substances 0.000 claims abstract description 28
- 229920001971 elastomer Polymers 0.000 claims abstract description 9
- 239000005060 rubber Substances 0.000 claims abstract description 9
- 239000004760 aramid Substances 0.000 claims description 16
- 229920003235 aromatic polyamide Polymers 0.000 claims description 16
- 238000009954 braiding Methods 0.000 claims description 11
- 229920000800 acrylic rubber Polymers 0.000 abstract description 17
- 229920000058 polyacrylate Polymers 0.000 abstract description 17
- 239000000853 adhesive Substances 0.000 abstract description 15
- 125000003118 aryl group Chemical group 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 68
- 238000011156 evaluation Methods 0.000 description 18
- 230000001070 adhesive effect Effects 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 230000035882 stress Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000004677 Nylon Substances 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 229920000297 Rayon Polymers 0.000 description 2
- 229920002978 Vinylon Polymers 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 235000012438 extruded product Nutrition 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002964 rayon Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は高温にざらされる自動車用などα釦［ホースに
関するものである。本発明の耐熱ホースはエアーホース
やオイルホース、特にターボチャージャーを装備したエ
ンジン用エアーホースとしての使用に適する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to α buttons [hose] for automobiles etc. which are exposed to high temperatures. The heat-resistant hose of the present invention is suitable for use as an air hose or oil hose, especially as an air hose for engines equipped with a turbocharger.
［従来技術］
従来の自動車用耐熱ホースとして、第５図に示すような
耐熱ホース１００が知られている。[Prior Art] As a conventional heat-resistant hose for automobiles, a heat-resistant hose 100 as shown in FIG. 5 is known.
この耐熱ホース１００は、アクリルゴム製の内層１１０
と、この内層１１０上に一体的に設けられたポリエステ
ル、ナイロン、ビニロン、レーヨンなどの補強糸１２０
を編組みしてなる編組み層と、この編組み層上に一体的
に被覆されたアクリルゴム製の外層１３０と、からなる
。This heat-resistant hose 100 has an inner layer 110 made of acrylic rubber.
and reinforcing yarn 120 made of polyester, nylon, vinylon, rayon, etc., integrally provided on this inner layer 110.
It consists of a braided layer formed by braiding, and an outer layer 130 made of acrylic rubber integrally coated on this braided layer.
［発明が解決しようとする課題］
現在、ターボチャージャーを装備したエンジンを搭載す
る自動車が増えており、かかる自動車のエンジンルーム
内の温度は１５０℃以上の高温にまで高温化する傾向に
ある。[Problems to be Solved by the Invention] Currently, more and more automobiles are equipped with engines equipped with turbochargers, and the temperature in the engine compartment of such automobiles tends to rise to a high temperature of 150° C. or higher.
従来の耐熱ホースはポリエステル、ナイロン、ビニロン
、レーヨンなどの繊維を補強糸１２０として編組みして
編組み層となしているので、このようなエンジンルーム
の高温化に対して適応できているとは言い雑い。Conventional heat-resistant hoses are made by braiding fibers such as polyester, nylon, vinylon, rayon, etc. as reinforcing threads 120 to form a braided layer, so it is possible to adapt to such high temperatures in the engine room. Noisy.
本発明は上記のエンジンルームの高温化に鑑みてなされ
たものであり、ホースを激しく脈動させるエンジンルー
ム内の部位へも装備可能な耐熱ホ−スを提供することを
目的とするものである。The present invention was made in view of the above-mentioned increase in engine room temperature, and an object of the present invention is to provide a heat-resistant hose that can be installed even in parts of the engine room where the hose is subject to intense pulsation.
［課題を解決するための手段］
本発明の耐熱ホースは、耐熱ゴム製の内層と、該内層上
に一体的に設けられた補強糸を編組みした補強層と、該
補強層上に一体的に被覆された耐熱ゴム製の外層と、か
うなる耐熱ホースにおいて、該補強層は、芳香族ポリア
ミド製の短繊維を撚って形成された補強糸を編組みして
なる編組み層から構成されていることを特徴とする耐熱
ホースである。[Means for Solving the Problems] The heat-resistant hose of the present invention includes an inner layer made of heat-resistant rubber, a reinforcing layer formed by braiding reinforcing threads integrally provided on the inner layer, and a reinforcing layer integrally provided on the reinforcing layer. In the heat-resistant hose, the reinforcing layer is composed of a braided layer formed by braiding reinforcing threads formed by twisting short fibers made of aromatic polyamide. This is a heat-resistant hose that is characterized by:
この耐熱ホースは、ホースに応力が生じてもこの応力の
集中を分散させることが可能な補強層を有することを特
徴とする。This heat-resistant hose is characterized by having a reinforcing layer that can disperse the concentration of stress even if stress is generated in the hose.
かかる補強層を有する耐熱ホースの開発にあたり、本発
明の発明者は鋭意研究の結果、耐熱ホースに生じる応力
の集中を分散させるためには芳香族ポリアミド製の短繊
維から形成された補強糸を使用し、この補強糸を編組み
した編組み層で補強層を構成すれば良いことを見出だし
た。なお短繊維は長さが３０〜１５００ｍｍで外径が１
〜２５μｍで、かつその撚り数を１ｍｉたり３０〜３０
０回に規制したものが好ましい。In developing a heat-resistant hose having such a reinforcing layer, the inventor of the present invention conducted extensive research and found that reinforcing threads formed from short fibers made of aromatic polyamide were used to disperse the concentration of stress occurring in the heat-resistant hose. However, it has been found that the reinforcing layer may be constructed of a braided layer made of this reinforcing thread. The short fibers have a length of 30 to 1,500 mm and an outer diameter of 1
~25μm, and the number of twists is 30~30 per 1mi
It is preferable to limit the number of times to 0.
内層および外層を構成する耐熱ゴムとして、アクリルゴ
ム（ＡＣＭ） 、シリコンゴム（Ｑ）、フッ素ゴム（Ｆ
ＫＭ）などの耐熱老化性、耐油性、耐燃料性に優れる耐
熱ゴムを使用することができる。この中でも、耐熱老化
性に優れるアクリルゴムが特に好ましい。Acrylic rubber (ACM), silicone rubber (Q), and fluororubber (F) are used as heat-resistant rubbers constituting the inner and outer layers.
A heat-resistant rubber having excellent heat aging resistance, oil resistance, and fuel resistance such as KM) can be used. Among these, acrylic rubber, which has excellent heat aging resistance, is particularly preferred.
さらに、上記のように構成した編組み層に接着剤を塗布
すれば、この接着剤が繊維間に介在して緩衝材として働
くので、補強糸同士の摩耗が軽減される。この接着剤に
は、内＠および外層を構成した耐熱ゴムと同種のゴムを
含む接着剤の使用が好ましい。これは内層と補強層およ
び補強層と外層の各層間の親和性を向上できるためでめ
る。例えば、内層および外層をアクリルゴムにて構成し
た場合、接着剤としてアクリルゴム系の接着剤を使用す
ることが好ましい。Furthermore, if an adhesive is applied to the braided layer configured as described above, this adhesive will be interposed between the fibers and act as a buffer material, thereby reducing wear between the reinforcing yarns. It is preferable to use an adhesive containing the same type of rubber as the heat-resistant rubber that constitutes the inner and outer layers. This is possible because the compatibility between the inner layer and the reinforcing layer and between the reinforcing layer and the outer layer can be improved. For example, when the inner layer and the outer layer are made of acrylic rubber, it is preferable to use an acrylic rubber adhesive as the adhesive.
［作用および効果］
本発明の耐熱ホースは、耐熱性に優れる芳香族ポリアミ
ド製の短繊維を撚って形成された補強糸を編組みしてな
る編組み層を補強層とするもので、１５０℃以上の高温
における連続使用、すなわち１５０℃以上に高温化する
自動車のエンジンルーム内の部位へも装備することがで
きる。[Functions and Effects] The heat-resistant hose of the present invention has a reinforcing layer formed by braiding reinforcing threads formed by twisting short fibers made of aromatic polyamide having excellent heat resistance, and has a reinforcing layer of 150 It can also be installed in the engine room of an automobile, which is used continuously at high temperatures of 150°C or higher, that is, the temperature reaches 150°C or higher.
ざらに、この芳香族ポリアミド製の短繊維からなる補強
糸を使用して補強層を構成することによって、耐熱ホー
スに応力が発生しても、補強糸を構成する芳香族ポリア
ミド製の短繊維の各々が軸方向に滑り合って相対移動し
、これによって応力の集中を分散させることができる。In general, by constructing the reinforcing layer using reinforcing yarn made of short aromatic polyamide fibers, even if stress is generated in the heat-resistant hose, the short fibers made of aromatic polyamide constituting the reinforcing yarn will not be removed. Each slides relative to each other in the axial direction, thereby making it possible to disperse stress concentration.
また補強糸の撚り数を規制することによって、第２図に
模式的に示すように、編組みの交差部においても補強糸
２１を構成する芳香族ポリアミド製の短繊維同士の接触
が面接触に近似できる状態となる。このため編組みの交
着部でも応力の集中を分散させることができる。一方、
かかる構成の芳香族ポリアミド製の短繊維を補強糸とし
て使用しなかった場合、例えば従来の長繊維などからな
る補強糸を使用した場合は、補強糸を構成する長繊維が
長く連続しているので繊維の一部に応力が集中し易い。In addition, by regulating the number of twists of the reinforcing yarn, as schematically shown in FIG. It becomes possible to approximate it. Therefore, concentration of stress can be dispersed even at the intersections of the braids. on the other hand,
If short fibers made of aromatic polyamide with such a structure are not used as reinforcing yarns, for example, if conventional reinforcing yarns made of long fibers are used, the long fibers that make up the reinforcing yarns are long and continuous. Stress tends to concentrate on some fibers.
本発明においては、ヤング率が極めて高いため、折れや
すく、かつ伸びにくい芳香族ポリアミド製の繊維を使用
しているが、前述したような短繊維を撚って形成した補
強糸を編組みしてなる編組み層を補強層に採用した結果
、芳香族ポリアミド製の繊維の折れやすさを克服できた
。この結果、本発明の耐熱ホースはホース内圧が激しく
変化して・ホースを激しく脈動させるエンジンルーム内
の部位や、ホースを激しく振動させるエンジンルーム内
の部位へ装備することが可能となった。In the present invention, aromatic polyamide fibers are used, which have an extremely high Young's modulus and are easily broken and difficult to stretch. As a result of using a braided layer as a reinforcing layer, we were able to overcome the tendency of aromatic polyamide fibers to break. As a result, the heat-resistant hose of the present invention can be installed in areas in the engine room where the internal pressure of the hose changes drastically and causes the hose to pulsate violently, or in areas in the engine room where the hose vibrates violently.
さらにまた、上記のように構成した芳香族ポリアミド製
の短繊維を撚って形成した補強糸を編組みしてなる補強
層に接着剤を塗布すれば、この接着剤が緩衝材として働
くので、補強糸同士の摩耗が軽減される。したがって、
本発明の耐熱ホースは上記した本発明の目的にさらに適
するものとなる。Furthermore, if an adhesive is applied to the reinforcing layer formed by braiding reinforcing threads formed by twisting short aromatic polyamide fibers configured as described above, this adhesive will act as a cushioning material. Abrasion between reinforcing threads is reduced. therefore,
The heat-resistant hose of the present invention is more suitable for the above-mentioned purpose of the present invention.
［実施例コ 以下、本発明の実施例につき説明する。[Example code] Examples of the present invention will be described below.
（第１実施例）
第１図に示すように本発明の第１実施例の耐熱ホース１
は、アクリルゴム類の内層１０と、内層１０上に一体的
に設けられた補強糸２１を編組みした補強層２０と、補
強層２０上に一体的に被覆されたアクリルゴム類の外層
３０と、からなる。(First embodiment) As shown in FIG. 1, a heat-resistant hose 1 according to a first embodiment of the present invention
consists of an inner layer 10 of acrylic rubber, a reinforcing layer 20 formed by braiding reinforcing threads 21 integrally provided on the inner layer 10, and an outer layer 30 of acrylic rubber integrally coated on the reinforcing layer 20. , consists of.
この補強層２０は、芳香族ポリアミド製の短繊維を撚っ
てなる補強糸２１を編組みし、この編組み層にアクリル
ゴム系接着剤２２を塗布したものからなる。なお、補強
糸２１は長さが９００ｍｍで外径が１２μｍの芳香族ポ
リアミド製の短繊維であり、その撚り数は第１表に示す
ように、１ｍあたり１００回に規制した。This reinforcing layer 20 is made by braiding reinforcing threads 21 made of twisted short fibers made of aromatic polyamide, and coating this braided layer with an acrylic rubber adhesive 22. The reinforcing yarn 21 was a short fiber made of aromatic polyamide with a length of 900 mm and an outer diameter of 12 μm, and the number of twists thereof was limited to 100 twists per meter as shown in Table 1.
上記のような構成の耐熱ホース１を下記のようにして製
造した。The heat-resistant hose 1 having the above configuration was manufactured in the following manner.
まず、アクリルゴムを押出し、内層１０を成形する。こ
の内層１０上に上記のように調製した芳香族ポリアミド
製の短繊維を撚って形成された補強糸２１を一体的に編
組みする。この補強糸２１を編組みした押出し成形品を
、アクリルゴム系接着剤を収容した接着剤槽内に浸漬し
、補強層２゜を形成する。この後、アクリルゴムを押出
し成形して外層３０を補強層２０上に一体的に被覆する
。First, acrylic rubber is extruded to form the inner layer 10. On this inner layer 10, reinforcing threads 21 formed by twisting the short fibers made of aromatic polyamide prepared as described above are integrally braided. The extrusion molded product in which the reinforcing threads 21 are braided is immersed in an adhesive tank containing an acrylic rubber adhesive to form a reinforcing layer 2°. Thereafter, the outer layer 30 is integrally coated on the reinforcing layer 20 by extrusion molding of acrylic rubber.
そして、心棒（マンドレル）を内層１０が形成する中央
孔内に挿入し形状を整えた後、加硫を行い上記で説明し
た構成の耐熱ホース１が製造できる。Then, after inserting a mandrel into the central hole formed by the inner layer 10 and adjusting the shape, vulcanization is performed to manufacture the heat-resistant hose 1 having the configuration described above.
なお、以下に述べる評価試験■および評価試験ＩＩ用に
、第３図に示すような内径が４１ ｍｍ。In addition, for evaluation test ① and evaluation test II described below, the inner diameter as shown in FIG. 3 was 41 mm.
外径が５１ｍｍ、内層１０、補強層２ｏおよび外層３０
の肉厚の合計が５ｍｍ、ホース軸心からの曲げの曲率半
径が５６ｍｍである曲り耐熱ホース１、そして第４図に
示すような内径が９ｍｍ、外径が１６ｍｍ、内層１０、
補強層２ｏおよび外層３０の肉厚の合計が３．５ｍｍ、
長さが２００ｍｍであるストレート耐熱ホース１の二種
類の耐熱ホース１を製造した。Outer diameter is 51 mm, inner layer 10, reinforcing layer 2o and outer layer 30
A bent heat-resistant hose 1 having a total wall thickness of 5 mm and a radius of curvature of 56 mm when bent from the hose axis, and an inner layer 10 having an inner diameter of 9 mm, an outer diameter of 16 mm, and an inner layer 10 as shown in FIG.
The total thickness of the reinforcing layer 2o and the outer layer 30 is 3.5 mm,
Two types of heat-resistant hoses 1 were manufactured, including a straight heat-resistant hose 1 having a length of 200 mm.
（第２実施例）
本第２実施例の耐熱ホース１は、第１実施例の耐熱ホー
ス１と同様の構成を有し、第１実施例の耐熱ホース１と
同様の製造方法にて製造されたものである。ただし、本
第２実施例の耐熱ホース１の補強層２０を構成する芳香
族ポリアミド製の短繊維を撚ってなる補強糸２１の撚り
数を第１表に示すように１ｍあたり２００回に規制した
。この補強糸２１以外の構惑は全て第１実施例の耐熱ホ
ース１と同一である。(Second Example) The heat-resistant hose 1 of the second example has the same configuration as the heat-resistant hose 1 of the first example, and is manufactured by the same manufacturing method as the heat-resistant hose 1 of the first example. It is something that However, the number of twists of the reinforcing yarn 21 made of twisted short fibers made of aromatic polyamide constituting the reinforcing layer 20 of the heat-resistant hose 1 of the second embodiment is limited to 200 twists per 1 m as shown in Table 1. did. All the structures other than the reinforcing thread 21 are the same as the heat-resistant hose 1 of the first embodiment.
なお、評価試験Ｉおよび評価試験ＩＩ用に、第１実施例
と同様の曲り耐熱ホース１およびストレート耐熱ホース
１の二種類の耐熱ホース１を製造した。For evaluation test I and evaluation test II, two types of heat-resistant hoses 1, a curved heat-resistant hose 1 and a straight heat-resistant hose 1, similar to those of the first example were manufactured.
（第３実施例）
本第３実施例の耐熱ホース１は、第１実施例の耐熱ホー
ス１と同様の構成を有し、第１実施例の耐熱ホース１と
同様の製造方法にて製造されたものである。ただし、本
第３実施例の耐熱ホース１の補強層２０を構成する芳香
族ポリアミド製の短繊維を撚ってなる補強糸２１の撚り
数を第１表に示すように１ｍあたり３００回に規制した
。この補強糸２１以外の構成は全て第１実施例の耐熱ホ
ース１と同一である。(Third Example) The heat-resistant hose 1 of the third example has the same configuration as the heat-resistant hose 1 of the first example, and is manufactured by the same manufacturing method as the heat-resistant hose 1 of the first example. It is something that However, the number of twists of the reinforcing yarn 21 made of twisted short fibers made of aromatic polyamide constituting the reinforcing layer 20 of the heat-resistant hose 1 of the third embodiment is limited to 300 twists per 1 m as shown in Table 1. did. All the structures other than the reinforcing thread 21 are the same as the heat-resistant hose 1 of the first embodiment.
なお、評価試験Ｉおよび評価試験ＩＩ用に、第１実施例
と同様の曲り耐熱ホース１およびストレート耐熱ホース
１の二種類の耐熱ホース１を製造した。For evaluation test I and evaluation test II, two types of heat-resistant hoses 1, a curved heat-resistant hose 1 and a straight heat-resistant hose 1, similar to those of the first example were manufactured.
（比較例１）
本比較例１の耐熱ホース１００は従来の耐熱ホースであ
り、第５図に示す構造を有する。この耐熱ホース１００
の編組み層を構成する補強糸１２０は外径が１．５μｍ
のポリエステル製の長繊維を約４００本数束したもので
あり、その撚り数は第１表に示すように１ｍあたり１５
０回とした。(Comparative Example 1) The heat-resistant hose 100 of Comparative Example 1 is a conventional heat-resistant hose and has a structure shown in FIG. 5. This heat resistant hose 100
The reinforcing yarn 120 constituting the braided layer has an outer diameter of 1.5 μm.
It is a bundle of about 400 long polyester fibers, and the number of twists is 15 per 1 m as shown in Table 1.
It was set as 0 times.
なお、本比較例１の耐熱ホース１ｏｏは、第１、第２お
よび第３実施例の耐熱ホース１と実質的に同じ製造方法
で製造されたものであるが、上記のポリエステル製の長
繊維を収束して形成した補強糸１２０を内層１１０上に
編組みした押出し成形品をアクリルゴム系接着剤を収容
した接着剤槽内に浸漬せずに、外層１３０を編組み層の
上に一体的に被覆したことが、第１、第２および第３実
施例の耐熱ホース１との製造方法と異なる。The heat-resistant hose 1oo of Comparative Example 1 was manufactured by substantially the same manufacturing method as the heat-resistant hoses 1 of the first, second, and third examples, but the above-mentioned polyester long fibers were The outer layer 130 is integrally placed on the braided layer without immersing the extruded product in which the reinforcing threads 120 formed by convergence are braided on the inner layer 110 in an adhesive tank containing an acrylic rubber adhesive. The method of manufacturing the heat-resistant hose 1 of the first, second, and third embodiments differs in that the hose is coated.
なお、評価試験■および評価試験ＩＩ用に、第１実施例
と同様の曲り耐熱ホース１００およびストレート耐熱ホ
ース１００の二種類の耐熱ホース１００８製造した。Two types of heat-resistant hoses 1008, a curved heat-resistant hose 100 and a straight heat-resistant hose 100 similar to those of the first embodiment, were manufactured for evaluation test (1) and evaluation test II.
（比較例２）
本比較例２の耐熱ホース１００は比較例１の耐熱ホース
１００と同様に、第５図に示す構造を有する。この耐熱
ホース１００の編組み層を構成する補強糸１２０は外径
が１．１μｍのナイロン製の長繊維を約４００本成束し
て形成したものであり、その撚り数は第１表に示すよう
に１ｍあたり１００回とした。なお、本比較例２の耐熱
ホース１００も、比較例１と同様に、上記のナイロン製
の長繊維を収束して形成した補強糸１２０を内層１１０
上に編組みした押出し成形品をアクリルゴム系接着剤を
収容した接着剤横内に浸漬せずに、外層１３０を編組み
層の上に一体的に被覆したことが、第１、第２および第
３実施例の耐熱ホース１との製造方法と異なる。(Comparative Example 2) The heat-resistant hose 100 of Comparative Example 2 has the structure shown in FIG. 5, similarly to the heat-resistant hose 100 of Comparative Example 1. The reinforcing yarn 120 constituting the braided layer of this heat-resistant hose 100 is formed by bundling approximately 400 nylon long fibers with an outer diameter of 1.1 μm, and the number of twists is shown in Table 1. 100 times per meter. In addition, in the heat-resistant hose 100 of Comparative Example 2, similarly to Comparative Example 1, the reinforcing yarn 120 formed by converging the above-mentioned nylon long fibers is added to the inner layer 110.
The fact that the outer layer 130 was integrally coated on the braided layer without dipping the extruded product braided therein into an adhesive layer containing an acrylic rubber adhesive was advantageous in that the outer layer 130 was integrally coated on the braided layer. The manufacturing method is different from that of the heat-resistant hose 1 of the third embodiment.
なお、評価試験Ｉおよび評価試験ＩＩ用に、第１実施例
と＠様の曲り耐熱ホース１００およびストレート耐熱ホ
ース１００の二種類の耐熱ホース１００を製造した。In addition, two types of heat-resistant hoses 100 were manufactured for evaluation test I and evaluation test II: a curved heat-resistant hose 100 and a straight heat-resistant hose 100 of the first example and @.
（評価試験Ｉ）
第３図に示す上記第１、第２、第３実施例の曲り耐熱ホ
ース１および上記比較例１と比較例２の曲り耐熱ホース
１００、都合５種類の曲り耐熱ホースについて、温度１
７０℃において各耐熱ホース内に空気を導入し、この空
気の圧力を０ｋｇ７０ｍ から３．５ｋｇ／ｃｍ”に昇
圧し、３．５ｋｇ／Ｃｍ２の空気圧力を２秒間維持し、
その後０ｋｇ／Ｃｍ に減圧し、Ｏｋｃ＋／ｃｍ”の
空気圧力を２秒間維持し、この昇圧および減圧操作を繰
り返すエアーインパルス試験を行った。第１表にこの試
験結果を示す。(Evaluation Test I) Regarding the bendable heat-resistant hoses 1 of the first, second and third embodiments shown in FIG. 3 and the bendable heat-resistant hoses 100 of the comparative examples 1 and 2, five types of bendable heat-resistant hoses were temperature 1
Air was introduced into each heat-resistant hose at 70°C, the pressure of this air was increased from 0 kg/cm to 3.5 kg/cm, and the air pressure of 3.5 kg/cm was maintained for 2 seconds.
Thereafter, the pressure was reduced to 0 kg/Cm2, the air pressure of Okc+/cm'' was maintained for 2 seconds, and an air impulse test was conducted in which the pressure increasing and decreasing operations were repeated.Table 1 shows the results of this test.
第１および第２実施例の曲り耐熱ホース１の場合は、上
記の昇圧および減圧操作を５万回以上繰り返しても破裂
しなかった。また、第３実施例の曲り耐熱ホース１の場
合は、上記の昇圧および減圧操作を１．８万回繰り返し
た際に破裂が生じた。In the case of the curved heat-resistant hoses 1 of the first and second examples, no rupture occurred even after the above pressure increase and decrease operations were repeated 50,000 times or more. Further, in the case of the curved heat-resistant hose 1 of the third example, rupture occurred when the above pressure increasing and decreasing operations were repeated 18,000 times.
しかしながら、この回数は比較例１および比較例２の曲
り耐熱ホース１００が上記の昇圧および減圧操作を１万
回繰り返した際に破裂したのに較べて、著しい性能の向
上があったものと認められる。However, this number of times is considered to be a significant improvement in performance compared to the curved heat-resistant hoses 100 of Comparative Examples 1 and 2 that burst when the above pressure increase and decrease operations were repeated 10,000 times. .
（評価試験ＩＩ）
第４図に示すような上記第１、第２、第３実施例のスト
レート耐熱ホース１および上記比較例１と比較例２のス
トレート耐熱ホース１００、都合５種類のストレート耐
熱ホースについて、上記の評価試験Ｉで）ホベたような
昇圧および減圧操作を繰り返すエアーインパルス試験を
行った。なお、この評価試験ＩＩの実施にあたり、上記
ストレート耐熱ホースの一端を固定し、他端を振幅±４
ｍｍで１分間あたり１０００サイクル撮動させた。(Evaluation Test II) Straight heat-resistant hoses 1 of the first, second, and third embodiments and straight heat-resistant hoses 100 of comparative examples 1 and 2, as shown in FIG. 4, and five types of straight heat-resistant hoses. Regarding the above evaluation test I), an air impulse test was conducted in which the pressure raising and lowering operations were repeated as in the above evaluation test. In conducting this evaluation test II, one end of the straight heat-resistant hose was fixed, and the other end was fixed at an amplitude of ±4.
Imaging was carried out at 1000 cycles per minute.
したがって、この評価試験ＩＩは動的エアーインパルス
試験である。第１表にこの試験結果を示す。Therefore, this evaluation test II is a dynamic air impulse test. Table 1 shows the results of this test.
第１および第２実施例のストレート耐熱ホース１の場合
は、上記の昇圧および減圧操作を５万回以上繰り返して
も破裂しなかった。また、第３実施例のストレート耐熱
ホース１の場合は、上記の昇圧および減圧操作を１．５
万回繰り返した際に破裂が生じた。しかしながら、この
回数は比較例１および比較例２のストレート耐熱ホース
１００が上記の昇圧および減圧操作を１万回繰り返した
際に破裂したのに較べて、著しい性能の向上があったも
のと認められる。In the case of the straight heat-resistant hoses 1 of the first and second examples, no rupture occurred even after the above pressure increase and decrease operations were repeated 50,000 times or more. In addition, in the case of the straight heat-resistant hose 1 of the third embodiment, the above pressure increase and decrease operations are performed by 1.5
Rupture occurred after 10,000 repetitions. However, compared to the straight heat-resistant hoses 100 of Comparative Examples 1 and 2 that burst after repeating the above pressure increase and decrease operations 10,000 times, this number of times is considered to be a significant improvement in performance. .
第１図は本発明の耐熱ホースの一実施例の断面図である
。第２図は本発明の耐熱ホースの一実施例の芳香族ポリ
アミド製の短繊維を撚って形成した補強糸を編組みして
なる補強層の交差部で応力の集中が分散される状態を示
す模式図である。第３図は評価試験Ｉ用に製造した曲り
耐熱ホースの平面図である。第４図は評価試験ＩＩ用に
製造したストレート耐熱ホースの平面図である。第５図
は従来の耐熱ホースの断面図である。
１・・・耐熱ホース
１０・・・内層、２０・・・補強層、３０・・・外層２
１・・・補強糸、２２・・・接着剤
第１図
第２図FIG. 1 is a sectional view of an embodiment of the heat-resistant hose of the present invention. Figure 2 shows the state in which stress concentration is dispersed at the intersection of the reinforcing layer, which is made by braiding reinforcing threads formed by twisting short fibers made of aromatic polyamide, in an embodiment of the heat-resistant hose of the present invention. FIG. FIG. 3 is a plan view of a curved heat-resistant hose manufactured for evaluation test I. FIG. 4 is a plan view of a straight heat-resistant hose manufactured for evaluation test II. FIG. 5 is a sectional view of a conventional heat-resistant hose. 1...Heat-resistant hose 10...Inner layer, 20...Reinforcement layer, 30...Outer layer 2
1... Reinforcing thread, 22... Adhesive Figure 1 Figure 2
Claims (1)
れた補強糸を編組みした補強層と、該補強層上に一体的
に被覆された耐熱ゴム製の外層と、からなる耐熱ホース
において、 該補強層は、芳香族ポリアミド製の短繊維を撚って形成
された補強糸を編組みしてなる編組み層から構成されて
いることを特徴とする耐熱ホース。(1) Consisting of an inner layer made of heat-resistant rubber, a reinforcing layer formed by braiding reinforcing threads provided integrally on the inner layer, and an outer layer made of heat-resistant rubber integrally coated on the reinforcing layer. A heat-resistant hose, characterized in that the reinforcing layer is composed of a braided layer formed by braiding reinforcing yarns formed by twisting short fibers made of aromatic polyamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1077473A JPH0674872B2 (en) | 1989-03-29 | 1989-03-29 | Heat resistant hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1077473A JPH0674872B2 (en) | 1989-03-29 | 1989-03-29 | Heat resistant hose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02256989A true JPH02256989A (en) | 1990-10-17 |
| JPH0674872B2 JPH0674872B2 (en) | 1994-09-21 |
Family
ID=13634956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1077473A Expired - Fee Related JPH0674872B2 (en) | 1989-03-29 | 1989-03-29 | Heat resistant hose |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0674872B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006266274A (en) * | 2004-03-04 | 2006-10-05 | Bridgestone Corp | Flexible hose |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4505100A (en) * | 1983-04-21 | 1985-03-19 | Teijin Limited | Heat-durable spun-like fasciated yarn and method for producing the same |
-
1989
- 1989-03-29 JP JP1077473A patent/JPH0674872B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4505100A (en) * | 1983-04-21 | 1985-03-19 | Teijin Limited | Heat-durable spun-like fasciated yarn and method for producing the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006266274A (en) * | 2004-03-04 | 2006-10-05 | Bridgestone Corp | Flexible hose |
| JP4616041B2 (en) * | 2004-03-04 | 2011-01-19 | 株式会社ブリヂストン | Flexible hose |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0674872B2 (en) | 1994-09-21 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |