JPH0560275A - Wear resisting hose - Google Patents
Wear resisting hoseInfo
- Publication number
- JPH0560275A JPH0560275A JP3219943A JP21994391A JPH0560275A JP H0560275 A JPH0560275 A JP H0560275A JP 3219943 A JP3219943 A JP 3219943A JP 21994391 A JP21994391 A JP 21994391A JP H0560275 A JPH0560275 A JP H0560275A
- Authority
- JP
- Japan
- Prior art keywords
- hose
- molecular weight
- rubber
- weight polyethylene
- layer
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、耐摩耗ホースに関す
る。さらに詳しくは、剛性が高く、耐摩耗性と曲げ性能
（特に耐キンク性）に優れ、寿命の長い耐摩耗ホースに
関する。FIELD OF THE INVENTION This invention relates to wear resistant hoses. More specifically, the present invention relates to a wear resistant hose having high rigidity, excellent wear resistance and bending performance (particularly kink resistance), and long life.
【０００２】[0002]
【従来の技術】トンネル工事用のセメント吹付用ホース
を代表例とする耐摩耗ホースにおいて、その耐摩耗性を
向上させるために、従来は、その内管の耐摩耗性を向上
させる、その内管の厚さを増加させる、等の手段が講じ
られていた。しかし、そのような対策を講じた耐摩耗ホ
ースも、曲げられて使用されると、内部を流通するモル
タル、セメント、砕石等の固体が局部的に衝突して摩耗
が生じ、他の部分は殆ど無傷であるのに使用不能となる
ことがあった。そこで、その対策として、ホースの一部
分で曲げを吸収せず、できるだけホース全長で曲げを吸
収するよう、ホースの剛性を高める方法（補強層の材質
の変更、施工角度の変更等）が検討されたが、ホースの
剛性を高めることにより、ホースの他の要求性能である
曲げ性能（特に耐キンク性）が低下し、曲げ半径が小さ
いような使用条件においては、使用が困難となった。2. Description of the Related Art In a wear-resistant hose typified by a cement spraying hose for tunnel construction, conventionally, in order to improve the wear resistance of the hose, the inner tube is improved in wear resistance. The measures were taken such as increasing the thickness of the. However, even if the wear-resistant hose with such measures taken is bent and used, solids such as mortar, cement, and crushed stone that flow through the interior locally collide with each other to cause wear, and most other parts are worn. It was unharmed but sometimes unusable. Therefore, as a countermeasure, a method of increasing the rigidity of the hose (changing the material of the reinforcing layer, changing the construction angle, etc.) was studied so that the bending of the hose is not absorbed and the bending of the hose is absorbed as much as possible. However, by increasing the rigidity of the hose, the bending performance (particularly kink resistance), which is another required performance of the hose, is lowered, and it becomes difficult to use it under the use condition where the bending radius is small.
【０００３】[0003]
【発明が解決しようとする課題】上述のごとく、耐摩耗
性に優れ、高い剛性と曲げ性能（耐キンク性）とを備え
た寿命の長い耐摩耗ホースは知られていない。本発明
は、上記の従来技術に鑑みてなされたものであり、耐摩
耗性に優れ、高い剛性と曲げ性能（耐キンク性）とを備
えた寿命の長い耐摩耗ホースの提供を目的とする。As described above, no wear resistant hose having excellent wear resistance, high rigidity and bending performance (kink resistance) and long life is known. The present invention has been made in view of the above prior art, and an object thereof is to provide a wear-resistant hose having excellent wear resistance, high rigidity, and bending performance (kink resistance) and having a long life.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、従来の耐
摩耗ホースに改善を加えるためにさらに検討した結果、
ゴムホースの最内層に超高分子量ポリエチレン層を所定
の状態で設けることにより、耐摩耗性に優れ、また、曲
げ性能（特に耐キンク性）および剛性が両立されたホー
スが得られることを見出し、本発明を完成したものであ
る。DISCLOSURE OF THE INVENTION As a result of further study by the present inventors to improve the conventional wear resistant hose,
It has been found that by providing an ultrahigh molecular weight polyethylene layer in the innermost layer of a rubber hose in a predetermined state, a hose having excellent wear resistance and having both bending performance (particularly kink resistance) and rigidity can be obtained. Completed the invention.
【０００５】すなわち本発明は、少なくとも、ゴム内
管、中間補強層およびゴム外管と、最内層に設けられた
重量平均分子量が５０万以上の超高分子量ポリエチレン
層とを有し、該超高分子量ポリエチレン層は、前記ゴム
内管と一体的に設けられていることを特徴とする耐摩耗
ホースを提供するものである。That is, the present invention has at least a rubber inner tube, an intermediate reinforcing layer and a rubber outer tube, and an ultrahigh molecular weight polyethylene layer having a weight average molecular weight of 500,000 or more provided in the innermost layer. The molecular weight polyethylene layer provides an abrasion resistant hose characterized by being integrally provided with the rubber inner tube.
【０００６】以下に、本発明を詳細に説明する。本発明
の耐摩耗ホースの最内層に用いる超高分子量ポリエチレ
ンは、粘度法による重量平均分子量（Ｍｗ）が５０万以
上であるものであり、Ｍｗが１００万以上のものが好ま
しくは、２００万ないし３００万の範囲のものがさらに
好ましい。粘度法による重量平均分子量（Ｍｗ）が５０
万以上の超高分子量ポリエチレンを用いることにより、
汎用の高密度ポリエチレンにはみられない耐摩耗性、低
摩擦係数が発現されるだけでなく、後記するゴム内管と
の一体的接着性も優れるものとなる。さらに、超高分子
量ポリエチレンを最内層に用いるため、ホースの剛性を
高めることも出来、それにより、局部的なホースの摩耗
も低減される。The present invention will be described in detail below. The ultrahigh molecular weight polyethylene used for the innermost layer of the wear resistant hose of the present invention has a weight average molecular weight (Mw) of 500,000 or more by a viscosity method, and one having a Mw of 1,000,000 or more is preferably 2,000,000 or more. The range of 3 million is more preferable. Weight average molecular weight (Mw) by viscosity method is 50
By using more than 10,000 ultra high molecular weight polyethylene,
Not only does it exhibit wear resistance and a low coefficient of friction that are not found in general-purpose high-density polyethylene, but it also excels in integral adhesion with the rubber inner tube described later. Furthermore, since the ultra-high molecular weight polyethylene is used for the innermost layer, the rigidity of the hose can be increased, and thereby the local wear of the hose is also reduced.
【０００７】ところで、本発明では、後記するように、
最内層の形成に超高分子量ポリエチレンのシート状成形
品を用いるが、現在、そのような超高分子量ポリエチレ
ンのシート状成形品として、超高分子量ポリエチレンの
ロッドから切削法で得られるいわゆるスカイブドフィル
ムと、超高分子量ポリエチレン粉末を特定の溶剤で膨潤
させ、これを押出機によって薄いシート状に押し出し、
必要に応じてカレンダー処理した後に脱気して得られる
ポーラスなフィルムが知られている。本発明では、いず
れの超高分子量ポリエチレンフィルムも用いることが出
来るが、成形加工性が良好で且つ成形後により平滑な表
面となる、後者のポーラスなフィルムを用いることが好
ましい。In the present invention, as will be described later,
A sheet-shaped molded product of ultra-high molecular weight polyethylene is used to form the innermost layer. Currently, a so-called skived film obtained from a rod of ultra-high-molecular-weight polyethylene by a cutting method as a sheet-shaped molded product of such an ultra-high molecular weight polyethylene. And swelling ultra high molecular weight polyethylene powder with a specific solvent, extruding this into a thin sheet with an extruder,
A porous film obtained by degassing after calendering as required is known. In the present invention, any ultra-high molecular weight polyethylene film can be used, but it is preferable to use the latter porous film which has good moldability and has a smoother surface after molding.
【０００８】なお、本発明では、これらのフィルムとし
て、超高分子量ポリエチレン単独の成形品を用いること
が好ましいが、少量の可塑剤、着色剤等を含有するもの
でもよい。In the present invention, it is preferable to use a molded product of ultra-high molecular weight polyethylene alone as these films, but a film containing a small amount of a plasticizer, a coloring agent or the like may be used.
【０００９】また、本発明では、これらのフィルムとし
て、通常、その厚さが２０μｍ以上のものを用いるが、
磨耗寿命や柔軟性の観点から、５０μｍ〜１０ｍｍのも
のが好ましく、５０μｍ〜５ｍｍのものがさらに好まし
い。In the present invention, as these films, those having a thickness of 20 μm or more are usually used.
From the viewpoint of wear life and flexibility, those having a thickness of 50 μm to 10 mm are preferable, and those having a thickness of 50 μm to 5 mm are more preferable.
【００１０】このような超高分子量ポリエチレン製フィ
ルムの代表的な機械物性を例示すれば、破断強度は約４
５０Ｋｇ／ｃｍ2 、破断伸びは約３７０％、硬度（ＪＩ
ＳＤ）は約６３である。The typical mechanical properties of such an ultra-high molecular weight polyethylene film have a breaking strength of about 4
50 Kg / cm 2 , elongation at break about 370%, hardness (JI
SD) is about 63.
【００１１】本発明の耐摩耗ホースが有するゴム内管、
中間補強層およびゴム外管は、この種のゴムホースにお
いて通常使用される材料で構成されたものでよく、特に
制限されない。ただし、ゴム内管については、その加硫
時、前記超高分子量ポリエチレンで形成される最内層と
溶融接着（ヒュージョンボンディング）により一体化さ
れ得るものを用いる。A rubber inner tube of the wear resistant hose of the present invention,
The intermediate reinforcing layer and the rubber outer tube may be made of materials normally used in this type of rubber hose, and are not particularly limited. However, as the rubber inner tube, one that can be integrated by fusion bonding (fusion bonding) with the innermost layer formed of the ultrahigh molecular weight polyethylene during vulcanization is used.
【００１２】従って、ゴム内管は、例えば天然ゴム（Ｎ
Ｒ）、スチレンブタジエンゴム（ＳＢＲ）、ブタジエン
ゴム（ＢＲ）等のゴムを主成分とするゴム組成物を用い
て形成すればよい。また、中間補強層としては、繊維や
金属製、あるいはさらにゴム層をも有する構成などが例
示されるが、ホースに耐力を付与できるものでありさえ
すれば良い。中間補強層は、一層に限定されず、二層以
上の多層構造となっていてもよい。ゴム外管は、前記ゴ
ム内管を形成するゴム組成物と同じ組成物を用いて形成
されたものであってもよいが、通常は、耐候性に優れる
クロロプレンゴム（ＣＲ）、エチレンプロピレンゴム
（ＥＰＴ）等のゴムを主成分とするゴム組成物を用いて
形成される。その層厚等は、特に限定されない。Therefore, the rubber inner tube is made of, for example, natural rubber (N
R), styrene-butadiene rubber (SBR), butadiene rubber (BR) or the like may be used as the main component. The intermediate reinforcing layer may be made of fiber or metal, or may have a rubber layer, and the like, as long as it can impart a proof stress to the hose. The intermediate reinforcing layer is not limited to one layer, and may have a multilayer structure of two or more layers. The outer rubber tube may be formed by using the same composition as the rubber composition forming the inner rubber tube, but it is usually chloroprene rubber (CR) or ethylene propylene rubber (CR) having excellent weather resistance ( It is formed using a rubber composition containing a rubber such as EPT) as a main component. The layer thickness and the like are not particularly limited.
【００１３】本発明の耐摩耗ホースは、少なくとも、超
高分子量ポリエチレンからなる最内層、ゴム内管、中間
補強層およびゴム外管を有するものである。すなわち、
これらのみからなるホースに限定されず、さらに他の層
を有するものをも含むのである。例えば、ゴム外管のさ
らに外側に他材料による外皮層を有しているもの等であ
ってももちろん構わない。The wear resistant hose of the present invention has at least an innermost layer made of ultra-high molecular weight polyethylene, a rubber inner tube, an intermediate reinforcing layer and a rubber outer tube. That is,
The hose is not limited to those made only of these, and includes those having other layers. For example, a rubber outer tube having an outer skin layer made of another material may be provided outside the rubber outer tube.
【００１４】本発明の耐摩耗ホースの一例を、図１に示
す。図１は、耐摩耗ホースの一部切り欠き断面図であ
り、１は超高分子量ポリエチレン層、２はゴム内管、３
は補強ゴム、４はワイヤー、５は中間ゴム、６はゴム外
管である。このホースでは、補強ゴム３、ワイヤー４お
よび中間ゴム５をあわせて中間補強層７という。An example of the wear resistant hose of the present invention is shown in FIG. FIG. 1 is a partially cutaway sectional view of a wear-resistant hose, where 1 is an ultra high molecular weight polyethylene layer, 2 is a rubber inner tube, and 3 is a rubber inner tube.
Is a reinforcing rubber, 4 is a wire, 5 is an intermediate rubber, and 6 is a rubber outer tube. In this hose, the reinforcing rubber 3, the wire 4, and the intermediate rubber 5 are collectively referred to as an intermediate reinforcing layer 7.
【００１５】本発明の耐摩耗ホースは、上記の構成で、
かつ、超高分子量ポリエチレンからなる最内層とゴム内
管とは、一体的となっているものである。これが一体的
となっていないと、ホースは耐久性に劣るものとなり、
短寿命となる。ここで、「一体的」とは、超高分子量ポ
リエチレン層がゴム内管の内側に単に設けられたのでは
なく、超高分子量ポリエチレン層とゴム内管の界面が明
確ではなくなる程度に、相互に部材が拡散し、強固に接
着している状態を意味する。より具体的には、両者が加
熱圧着されることにより、界面で両層のマトリックス空
隙への相互の浸透、拡散が起こり、冷却後に両層が強固
に固定された状態である。このような接着状態は、溶融
接着（ヒュージョンボンディング）と呼ばれるものであ
り、「カウチューク ウンツ グミー クンストストッ
フェ（Kautschuk+Gummi Kunststoffe ）、３４巻、８
頁、１９８１年」で既に公知である。具体的には、後記
の方法で達成されるものである。The wear resistant hose of the present invention has the above-mentioned constitution,
In addition, the innermost layer made of ultra-high molecular weight polyethylene and the rubber inner tube are integrated. If this is not integrated, the hose will be less durable,
It has a short life. Here, "integrally" does not mean that the ultra-high molecular weight polyethylene layer is simply provided inside the rubber inner tube, but the mutual relationship is such that the interface between the ultra-high molecular weight polyethylene layer and the rubber inner tube becomes unclear. It means a state in which members are diffused and firmly bonded. More specifically, when both are thermocompression bonded, the layers permeate and diffuse into the matrix voids of both layers at the interface, and both layers are firmly fixed after cooling. Such an adhesive state is called fusion bonding (fusion bonding), and is described in "Kautchuk + Gummi Kunststoffe", 34, 8
Page, 1981 ". Specifically, it is achieved by the method described below.
【００１６】本発明では、耐摩耗ホースの最内層に超高
分子量ポリエチレンを用い、該最内層を内管ゴムと一体
的としている。その結果、その界面の剥離強度は、通常
５ｋｇｆ／２５ｍｍ以上、条件によっては１０ｋｇｆ／
２５ｍｍ以上、さらには２０ｋｇｆ／２５ｍｍ以上とも
なっている。このように、最内層の超高分子量ポリエチ
レン層とゴム内管とが一体的に強固に接着しているため
に、ホースが耐久性に優れるのみならず、超高分子量ポ
リエチレンのもつ耐摩耗性、剛性等の特性が、充分に生
かされ得たのである。In the present invention, ultrahigh molecular weight polyethylene is used for the innermost layer of the wear resistant hose, and the innermost layer is integrated with the inner tube rubber. As a result, the peel strength at the interface is usually 5 kgf / 25 mm or more, and 10 kgf /
It is 25 mm or more, further 20 kgf / 25 mm or more. In this way, since the innermost ultrahigh molecular weight polyethylene layer and the rubber inner tube are integrally and firmly adhered, not only the hose has excellent durability, but also the abrasion resistance of the ultrahigh molecular weight polyethylene, The characteristics such as rigidity could be fully utilized.
【００１７】本発明の耐摩耗ホースの構成は、以上の通
りであるが、出来上がった（加硫後の）ホースの超高分
子量ポリエチレン層の厚さｔ（ｍｍ）とホースの内径Ｄ
（ｍｍ）とが下記式Ｉの関係を満たすと、ホースの剛性
と曲げ性能（耐キンク性）の点で好ましい。 （式Ｉ） ７．７×１０-4Ｄ≦ｔ≦６．１×１０-2Ｄ さらに、その剛性と曲げ性能とを確実に両立させるため
には、下記式IIの関係を満たすように設計することが好
ましい。 （式II） １．５×１０-3Ｄ≦ｔ≦１．６×１０-2Ｄ なお、耐摩耗ホースの加硫後における超高分子量ポリエ
チレン層の厚さｔ（ｍｍ）とホースの内径Ｄ（ｍｍ）と
の関係は、後述する耐摩耗ホースの製造方法を実施する
に際し、所望の数値となるよう設計可能である。The constitution of the wear-resistant hose of the present invention is as described above, but the thickness t (mm) of the ultra-high molecular weight polyethylene layer of the finished (after vulcanization) hose and the inner diameter D of the hose D
It is preferable that (mm) satisfies the relation of the following formula I from the viewpoint of hose rigidity and bending performance (kink resistance). (Formula I) 7.7 × 10 −4 D ≦ t ≦ 6.1 × 10 −2 D Furthermore, in order to ensure both the rigidity and the bending performance, it is designed to satisfy the relation of the following formula II. Preferably. (Formula II) 1.5 × 10 −3 D ≦ t ≦ 1.6 × 10 −2 D In addition, the thickness t (mm) of the ultra high molecular weight polyethylene layer after vulcanization of the wear resistant hose and the inner diameter D of the hose The relationship with (mm) can be designed to have a desired numerical value when carrying out the method for manufacturing a wear-resistant hose described later.
【００１８】本発明の耐摩耗ホースの製造方法は、特に
限定されないが、通常は次のような工程を採用する。す
なわち、金属製マンドレルに、超高分子量ポリエチレン
製フィルムを、テープを巻き付けるように一部重ね合わ
せながらスパイラル状に巻き、次に、その上に、ゴム内
管となるゴム組成物を巻き付ける。以後、通常の方法に
より、補強層、未加硫ゴム外管、さらに必要に応じ、外
皮層等を順次形成する。こうして得られた未加硫ホース
をナイロンラッピングした後、釜加硫する。加硫条件
は、特に限定されない。加硫後にラッピングしたナイロ
ンを除去し、マンドレルを引き抜くことにより、本発明
の耐摩耗ホースが得られる。The method for producing the wear resistant hose of the present invention is not particularly limited, but the following steps are usually adopted. That is, a film made of ultrahigh molecular weight polyethylene is wound around a metal mandrel in a spiral shape while being partially overlapped so that a tape is wound around the mandrel, and then a rubber composition to be a rubber inner tube is wound thereon. Thereafter, a reinforcing layer, an unvulcanized rubber outer tube, and if necessary, an outer skin layer and the like are sequentially formed by a usual method. The unvulcanized hose thus obtained is nylon-wrapped and then pot-vulcanized. Vulcanization conditions are not particularly limited. After vulcanization, the wrapped nylon is removed, and the mandrel is pulled out to obtain the wear resistant hose of the present invention.
【００１９】前記加硫時において、最内層の超高分子量
ポリエチレン層は溶融し、ゴム内管と溶融接着する。そ
の際、超高分子量ポリエチレンの重ね合わせ部分は解消
し、その厚さは均一となる。従って、マンドレルの線径
と超高分子量ポリエチレン製フィルムの巻き付け条件
（重ね合わせ部の幅、重ね合わせ部間の距離等）の設計
により、前記した超高分子量ポリエチレン層の厚さｔ
（ｍｍ）とホースの内径Ｄ（ｍｍ）との関係を、所望の
通りとすることが出来る。During the vulcanization, the innermost ultra-high molecular weight polyethylene layer is melted and melt-bonded to the rubber inner tube. At that time, the overlapping portion of the ultra high molecular weight polyethylene is eliminated, and the thickness becomes uniform. Therefore, the thickness t of the ultra-high molecular weight polyethylene layer is determined by designing the wire diameter of the mandrel and the conditions for winding the ultra-high molecular weight polyethylene film (width of the overlapping portions, distance between the overlapping portions, etc.).
The relationship between (mm) and the inner diameter D (mm) of the hose can be set as desired.
【００２０】本発明の耐摩耗ホースは、耐摩耗性が良好
で、剛性が高く、また、曲げ性能（耐キンク性）にも優
れるので、従来のものよりも長寿命である。従って、本
発明の耐摩耗ホースは、例えば、トンネル工事用のセメ
ント用吹付ホース、浚渫用ホース、穀物輸送用ホース、
セメント圧送用ホース等として好適である。The wear-resistant hose of the present invention has good wear resistance, high rigidity, and excellent bending performance (kink resistance), and therefore has a longer life than conventional ones. Therefore, the wear-resistant hose of the present invention includes, for example, a cement spray hose for tunnel construction, a dredging hose, a grain transportation hose,
It is suitable as a cement feeding hose.
【００２１】[0021]
【実施例】以下に、実施例により、本発明を具体的に説
明する。EXAMPLES The present invention will be described below in greater detail by giving Examples.
【００２２】（実施例）下記の材料（表Ａ〜Ｅ参照）を
用い、金属製マンドレルに、厚さ８０μｍの超高分子量
ポリエチレン製フィルムを、表Ａに示す層厚になるよ
う、テープを巻き付けるようにスパイラル状に巻き、以
下、通常の方法により、ゴム内管、中間補強層およびゴ
ム外管を形成し、こうして得られた未加硫ホースをナイ
ロンラッピングした後、１４２℃にて１５０分間のスチ
ーム釜加硫を行ない、ホースを得た。また、超高分子量
ポリエチレン層を欠く以外は同様の構成のホースも製造
した。なお、ホース内径は６５ｍｍ、長さは１ｍであ
る。それらについて、下記の試験を行なった。結果は表
Ｆに示した。(Example) Using the following materials (see Tables A to E), an 80 μm thick ultra high molecular weight polyethylene film was wrapped around a metal mandrel with a tape to a layer thickness shown in Table A. As described above, the rubber inner tube, the intermediate reinforcing layer and the rubber outer tube are formed by a conventional method, and the unvulcanized hose thus obtained is nylon-lapped, and then at 142 ° C. for 150 minutes. The steam kettle was vulcanized to obtain a hose. In addition, a hose having the same structure except that the ultrahigh molecular weight polyethylene layer was omitted was also manufactured. The inner diameter of the hose is 65 mm and the length is 1 m. The following tests were conducted on them. The results are shown in Table F.
【００２３】（１）ホースの構成(1) Structure of hose
【表１】 [Table 1]
【００２４】 [0024]
【００２５】 [0025]
【００２６】 [0026]
【００２７】 [0027]
【００２８】（２）試験方法 （ａ）曲げ剛性（ＥＩ） 図２に示すように、ホースＨを支持し、その中央部に荷
重Ｗを加え、そのときの変位量ｖを測定した。曲げ剛性
（ＥＩ）は、下式III に従って算出した。(2) Test Method (a) Bending Stiffness (EI) As shown in FIG. 2, a hose H was supported, a load W was applied to the center of the hose H, and the displacement amount v at that time was measured. The flexural rigidity (EI) was calculated according to the following formula III.
【００２９】[0029]
【数１】 [Equation 1]
【００３０】（ｂ）耐曲げ性能 ホースを順次曲げ、各曲げ半径で、キンク発生の有無、
凹凸発生の有無を目視判定した。(B) Bending resistance performance The hose is sequentially bent, and a kink is generated at each bending radius.
The presence or absence of unevenness was visually determined.
【００３１】（３）結果 表Ｆの通りである。(3) Results The results are shown in Table F.
【００３２】[0032]
【表２】 [Table 2]
【発明の効果】本発明により、耐摩耗性に優れ、高い剛
性と曲げ性能（耐キンク性）とを備えた寿命の長い耐摩
耗ホースが提供される。本発明の耐摩耗ホースは、最内
層として超高分子量ポリエチレン層を有するため、ホー
スの耐摩耗性が優れるとともに、ホースの剛性が高い。
その結果、局部的な摩耗が抑制されるため、ホース全体
の摩耗が一様に進行し、従来のものに比べ、著しく寿命
の長い耐摩耗ホースが提供されるようになったものであ
る。また、本発明によれば、超高分子量ポリエチレン層
の厚さとホース内径との関係を最適化することにより、
剛性と曲げ性能（特に耐キンク性）とを兼ね備える耐摩
耗ホースが提供されるようになる。According to the present invention, a wear resistant hose having excellent wear resistance, high rigidity and bending performance (kink resistance) and having a long life is provided. Since the wear resistant hose of the present invention has the ultra high molecular weight polyethylene layer as the innermost layer, the hose has excellent wear resistance and high hose rigidity.
As a result, local wear is suppressed, so that wear of the entire hose progresses uniformly, and a wear-resistant hose having a significantly longer life than the conventional one is provided. Further, according to the present invention, by optimizing the relationship between the thickness of the ultra high molecular weight polyethylene layer and the hose inner diameter,
A wear resistant hose having both rigidity and bending performance (particularly kink resistance) is provided.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の耐摩耗ホースの一例の一部切り欠き断
面図である。FIG. 1 is a partially cutaway sectional view of an example of a wear-resistant hose of the present invention.
【図２】実施例における曲げ剛性試験を示す模式図であ
る。FIG. 2 is a schematic diagram showing a bending rigidity test in Examples.
１ 超高分子量ポリエチレン層 ２ ゴム内管 ３ 補強ゴム ４ ワイヤー ５ 中間ゴム ６ ゴム外管 ７ 中間補強層 1 Ultra High Molecular Weight Polyethylene Layer 2 Rubber Inner Tube 3 Reinforcement Rubber 4 Wire 5 Intermediate Rubber 6 Rubber Outer Tube 7 Intermediate Reinforcement Layer
Claims (2)
ゴム外管と、最内層に設けられた重量平均分子量が５０
万以上の超高分子量ポリエチレン層とを有し、該超高分
子量ポリエチレン層は、前記ゴム内管と一体的に設けら
れていることを特徴とする耐摩耗ホース。1. A rubber inner tube, an intermediate reinforcing layer and a rubber outer tube, and a weight average molecular weight of 50 provided in the innermost layer.
A wear-resistant hose, characterized in that it has at least 10,000 ultra high molecular weight polyethylene layers, and the ultra high molecular weight polyethylene layers are provided integrally with the rubber inner tube.
ｍ）とホース内径Ｄ（ｍｍ）とが下記式Ｉの関係にある
請求項１に記載の耐摩耗ホース。 （式Ｉ） ７．７×１０-4Ｄ≦ｔ≦６．１×１０-2Ｄ2. The thickness t (m) of the ultra high molecular weight polyethylene layer
The wear-resistant hose according to claim 1, wherein m) and the inner diameter D (mm) of the hose have the relationship of the following formula I. (Formula I) 7.7 × 10 −4 D ≦ t ≦ 6.1 × 10 −2 D
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3219943A JPH07117179B2 (en) | 1991-08-30 | 1991-08-30 | Wear resistant hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3219943A JPH07117179B2 (en) | 1991-08-30 | 1991-08-30 | Wear resistant hose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0560275A true JPH0560275A (en) | 1993-03-09 |
| JPH07117179B2 JPH07117179B2 (en) | 1995-12-18 |
Family
ID=16743464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3219943A Expired - Fee Related JPH07117179B2 (en) | 1991-08-30 | 1991-08-30 | Wear resistant hose |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07117179B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002243069A (en) * | 2001-02-15 | 2002-08-28 | Togawa Rubber Co Ltd | Manufacturing method and device for rubber hose |
| JP2011080523A (en) * | 2009-10-06 | 2011-04-21 | Yokohama Rubber Co Ltd:The | Fluid carrying hose |
| JP2013137089A (en) * | 2011-12-28 | 2013-07-11 | Togawa Rubber Co Ltd | Tube for earth removal valve, and method of manufacturing the same |
| CN105156776A (en) * | 2015-09-15 | 2015-12-16 | 邵素英 | Hose for delivering liquefied natural gas and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2792479B1 (en) | 2011-12-12 | 2016-11-02 | The Yokohama Rubber Co., Ltd. | Rubber/resin composite hose |
-
1991
- 1991-08-30 JP JP3219943A patent/JPH07117179B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002243069A (en) * | 2001-02-15 | 2002-08-28 | Togawa Rubber Co Ltd | Manufacturing method and device for rubber hose |
| JP2011080523A (en) * | 2009-10-06 | 2011-04-21 | Yokohama Rubber Co Ltd:The | Fluid carrying hose |
| JP2013137089A (en) * | 2011-12-28 | 2013-07-11 | Togawa Rubber Co Ltd | Tube for earth removal valve, and method of manufacturing the same |
| CN105156776A (en) * | 2015-09-15 | 2015-12-16 | 邵素英 | Hose for delivering liquefied natural gas and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07117179B2 (en) | 1995-12-18 |
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