JPH0752288A - Synthetic resin tubular body - Google Patents
Synthetic resin tubular bodyInfo
- Publication number
- JPH0752288A JPH0752288A JP22816093A JP22816093A JPH0752288A JP H0752288 A JPH0752288 A JP H0752288A JP 22816093 A JP22816093 A JP 22816093A JP 22816093 A JP22816093 A JP 22816093A JP H0752288 A JPH0752288 A JP H0752288A
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- resin
- thermoplastic
- tubular body
- 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.)
- Pending
Links
Landscapes
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は内管、補強層、外被層か
らなる合成樹脂管状体に関し、例えば、管状体の一例で
あるホ−スとしての諸性能は勿論、これに柔軟性を付与
した合成樹脂ホ−スにかかるものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin tubular body composed of an inner pipe, a reinforcing layer and an outer coating layer. It is related to the applied synthetic resin hose.
【０００２】[0002]
【従来の技術】合成樹脂による管状体は数多く存在する
が、例えば、耐油性、耐薬品性、耐水性に使用される合
成樹脂ホ−スとしては、熱可塑性を有するポリウレタ
ン、ポリエステル、ポリアミド等の樹脂を押出成形によ
って内管を構成し、これに例えばポリエステル繊維を編
み上げて補強層となし、外被としてこの上に熱可塑性ポ
リウレタン樹脂を押出成形するものが一般的である。BACKGROUND OF THE INVENTION There are many tubular bodies made of synthetic resin. For example, synthetic resin hoses used for oil resistance, chemical resistance and water resistance include thermoplastic polyurethane, polyester, polyamide and the like. It is common that an inner tube is formed by extrusion molding a resin, and a polyester fiber is knitted into the inner tube to form a reinforcing layer, and a thermoplastic polyurethane resin is extrusion-molded thereon as a jacket.
【０００３】[0003]
【発明が解決しようとする課題】特に、この種のホ−ス
の内管はその用途に応じて夫々好ましい合成樹脂が選択
されることとなり、例えば工作機械や農業用機械等の油
圧或いは特殊流体用のホ−スとして用いられるが、各種
機械がコンパクト化されるに従い、ホ−スに柔軟性が要
求されるようになってきた。しかるに、この目的のた
め、ホ−スの内管材料に熱可塑性ポリウレタン樹脂等の
柔らかい樹脂を用いてホ−スの柔軟性を追求しようとす
ると、耐熱性能や繰り返し耐圧性能が劣り、ホ−スの柔
軟性と耐熱、耐圧、耐油性能等の諸性能を両立させるこ
とは困難であった。Particularly, for the inner pipe of this type of hose, a preferable synthetic resin is selected depending on the application, and for example, hydraulic or special fluid for machine tools and agricultural machines is used. The hose is used as a hose, but as various machines are made compact, the hose is required to have flexibility. However, for this purpose, if a soft resin such as a thermoplastic polyurethane resin is used for the inner tube material of the hose to pursue the flexibility of the hose, the heat resistance and the repeated pressure resistance are inferior, and the hose is deteriorated. It was difficult to achieve both flexibility and various performances such as heat resistance, pressure resistance and oil resistance.
【０００４】又、ホ−スの柔軟性と要求される諸性能と
を両立させるため、内管を二層に構成した二層内管ホ−
スも考えられているが、これには専用の押出設備が必要
となり、製造コストが極めて高くなると言う問題が生じ
る。Further, in order to make the flexibility of the hose compatible with various performances required, the two-layer inner pipe hose in which the inner pipe is composed of two layers
However, this requires a dedicated extrusion equipment, which causes a problem that the manufacturing cost becomes extremely high.
【０００５】更には、熱可塑性を有するポリウレタン樹
脂やポリエステル樹脂は、一方では温熱水に使用すると
加水分解を生じてしまい、使用に供することができなく
なると言う欠点もある。Further, the polyurethane resin and polyester resin having thermoplasticity, on the other hand, have the drawback that they cannot be used because they cause hydrolysis when used in hot water.
【０００６】本発明はいわゆる合成樹脂管状体に柔軟性
を付与し、更に諸性能を向上させたホ−スを提供するこ
とを目的としている。It is an object of the present invention to provide a hose which imparts flexibility to a so-called synthetic resin tubular body and further improves various performances.
【０００７】[0007]
【課題を解決するための手段】本発明は以上の目的を達
成するために、合成樹脂管状体を以下に記載する構成と
したものである。即ち、本発明は、内管、補強僧、外被
層からなる合成樹脂管状体であって、内管を形成する合
成樹脂として、二種類以上の熱可塑性樹脂を配合し、内
管を押出成形してなることを特徴とする合成樹脂管状体
にかかるものである。In order to achieve the above object, the present invention has a synthetic resin tubular body having the structure described below. That is, the present invention is a synthetic resin tubular body composed of an inner pipe, a reinforcing ridge, and an outer coat layer, wherein two or more kinds of thermoplastic resins are blended as the synthetic resin forming the inner pipe, and the inner pipe is extruded. The present invention relates to a synthetic resin tubular body characterized in that
【０００８】そして、特徴的には、内管を形成する合成
樹脂として、熱可塑性ポリウレタン樹脂１００重量部に
対し、熱可塑性ポリエステル樹脂或いは熱可塑性ポリア
ミド樹脂が５〜９５０、好ましくは１０〜２５０重量部
を配合した樹脂を用い、これを押出成形した合成樹脂管
状体にかかるものである。Characteristically, as the synthetic resin forming the inner tube, the thermoplastic polyester resin or the thermoplastic polyamide resin is 5 to 950 parts, preferably 10 to 250 parts by weight, relative to 100 parts by weight of the thermoplastic polyurethane resin. The present invention relates to a synthetic resin tubular body obtained by extrusion-molding a resin containing
【０００９】[0009]
【作用】本発明の最も特徴とするところは、内管を形成
する合成樹脂を二種類以上の熱可塑性樹脂を配合してな
るものであり、複数の熱可塑性樹脂を配合する量を最適
化することにより、熱可塑性樹脂単体よりなる内管の欠
点を改良し、柔軟性を付与すると共に、インパルス圧力
耐久特性、耐熱水性をも併せて改善したものである。
尚、本発明にあって、合成樹脂管状体としては前記した
ようなホ−スは勿論のこと、各種チュ−ブをも含むこと
は当然である。The most characteristic feature of the present invention is that the synthetic resin for forming the inner pipe is blended with two or more kinds of thermoplastic resins, and the amount of blending a plurality of thermoplastic resins is optimized. As a result, the drawbacks of the inner tube made of the thermoplastic resin alone are improved, flexibility is imparted, and the impulse pressure durability characteristic and hot water resistance are also improved.
In the present invention, it goes without saying that the synthetic resin tubular body includes not only the hose as described above but also various tubes.
【００１０】[0010]
【実施例】以下、実施例をもって本発明を更に詳細に説
明する。さて、後述する合成樹脂をもって内径９．５ｍ
ｍ、厚さ１．２ｍｍの内管を構成した。そして、内管上
にポリエステル繊維編組の補強層を介して熱可塑性ポリ
ウレタン樹脂を外被層とするもので、このホ−スの外径
は１７ｍｍである。The present invention will be described in more detail with reference to the following examples. Now, with the synthetic resin described below, the inner diameter is 9.5 m.
An inner tube having a thickness of m and a thickness of 1.2 mm was constructed. Then, a thermoplastic polyurethane resin is used as an outer coat layer on the inner tube through a reinforcing layer of a polyester fiber braid, and the outer diameter of this hose is 17 mm.
【００１１】（実施例１〜６）内管を構成する合成樹脂
として表１に示す樹脂を用いて内管を押出成形した。表
中、ＴＰＵは熱可塑性ポリウレタン樹脂（クラレ社製・
Ｂ９６９５）、ＴＰＥＥは熱可塑性ポリエステル樹脂
（東洋紡社製・Ｐ９０ＢＤ）、ＰＡ１２は熱可塑性ポリ
アミド樹脂（宇部興産社製・３０３５ＪＵ）である。(Examples 1 to 6) The inner tube was extruded using the resin shown in Table 1 as the synthetic resin constituting the inner tube. In the table, TPU is a thermoplastic polyurethane resin (Kuraray Co., Ltd.
B9695), TPEE is a thermoplastic polyester resin (P90BD manufactured by Toyobo Co., Ltd.), and PA12 is a thermoplastic polyamide resin (3035JU manufactured by Ube Industries, Ltd.).
【００１２】ホ−スとしての試験は、柔軟性、インパル
ス圧力耐久特性、耐熱水性の各性能を試験した。試験結
果を表１に示す。In the test as a hose, the flexibility, impulse pressure durability and hot water resistance were tested. The test results are shown in Table 1.
【００１３】[0013]
【表１】 [Table 1]
【００１４】柔軟性試験は、ホ−スを直径１２０ｍｍに
湾曲させ、半円とした際のホ−ス端における反力をもっ
て示した。試験結果の表示は、この反力が４ｋｇｆ未満
を◎、４〜４．５ｋｇｆを○、４．５ｋｇｆ以上を×と
した。インパルス圧力耐久特性は、１００℃の条件下
で、２８０ｋｇｆ／ｃｍ2 の内圧（油圧）を繰り返しか
け、アッセンブリホ−スの耐久試験を行った。試験結果
の表示は、８０万回以上の耐久性があったものを◎、６
０〜８０万回の場合を○、それ以下の場合を×とした。
耐熱水性試験は、８０℃の熱水を２１０ｋｇｆ／ｃｍ2
の内圧でホ−ス内に封入して試験した。試験結果の表示
は、１０００時間の耐久性があったものを◎、それ以下
の場合を×とした。The flexibility test was shown by the reaction force at the end of the hose when the hose was curved to a diameter of 120 mm and formed into a semicircle. In the display of the test results, the reaction force of less than 4 kgf is marked with ⊚, 4 to 4.5 kgf is marked with o, and 4.5 kgf or more is marked with x. The impulse pressure durability characteristics were obtained by repeatedly applying an internal pressure (hydraulic pressure) of 280 kgf / cm 2 under the condition of 100 ° C. to carry out a durability test of the assembly hose. The display of the test result is ◎, 6 when the durability was 800,000 times or more.
The case of 0 to 800,000 times was marked with ◯, and the case of less than that was marked with x.
The hot water resistance test was conducted using hot water of 80 ° C at 210 kgf / cm 2
It was sealed in the hose with the internal pressure of and tested. In the display of the test result, the one having durability for 1000 hours was marked with ⊚, and the one less than that was marked with x.
【００１５】（比較例１〜５）比較例１〜３は合成樹脂
単体の内管、比較例４〜５は内管を二層としたものであ
る。この内、比較例４は最内層がＴＰＥＥ、外層がＴＰ
Ｕである内管であり、肉厚比は１：１（材料重量比１：
１．４）、比較例５は最内層がＰＡ１２、外層がＴＰＵ
である内管であり、肉厚比は１：４（材料重量比１：
５．５）である。試験結果を表２に示す。(Comparative Examples 1 to 5) Comparative Examples 1 to 3 are inner tubes made of a synthetic resin alone, and Comparative Examples 4 to 5 are inner tubes having two layers. Of these, in Comparative Example 4, the innermost layer was TPEE and the outer layer was TP
The inner tube is U, and the wall thickness ratio is 1: 1 (material weight ratio 1:
1.4), in Comparative Example 5, the innermost layer is PA12 and the outermost layer is TPU.
Is an inner tube, and the wall thickness ratio is 1: 4 (material weight ratio 1:
5.5). The test results are shown in Table 2.
【００１６】[0016]
【表２】 [Table 2]
【００１７】比較例１にあっては柔軟性に優れてはいる
が、他の性能は極めて劣っており、実際上の使用に堪え
ないものである。比較例２はインパルス圧力耐久特性は
優れているが、柔軟性と耐熱水加圧性に劣り、比較例３
はインパルス圧力耐久特性と耐熱水加圧性に優れている
が、柔軟性が極めて劣っていることがわかる。比較例
４、５も同様に一長一短がある。Although Comparative Example 1 is excellent in flexibility, it is extremely inferior in other performances and cannot be used practically. Comparative Example 2 is excellent in impulse pressure durability, but inferior in flexibility and hot water pressure resistance, and Comparative Example 3
It is found that, while having excellent impulse pressure durability characteristics and hot water pressure resistance, it has extremely poor flexibility. Comparative Examples 4 and 5 also have advantages and disadvantages.
【００１８】さて、前記の表１に示すように、本発明の
いずれの実施例にあっても、柔軟性、インパルス圧力耐
久特性及び耐熱水加圧性が優れており、極めてバランス
のよい合成樹脂ホ−スが得られることが判明した。As shown in Table 1 above, in any of the examples of the present invention, the flexibility, impulse pressure endurance property and hot water pressure resistance are excellent, and the synthetic resin resin is very well balanced. -It turns out that you get
【００１９】[0019]
【発明の効果】本発明は、以上のように内管を構成する
合成樹脂を複数の熱可塑性樹脂を選択し、かつその配合
割合を最適化したものであって、これによって従来の合
成樹脂管状体と同等以上の性能を発揮すると共に、管状
体自体に柔軟性を付与することができたものである。
又、チュ−ブ状体の成形にあっては、例えばＴＰＵ単独
ではその成形性が極めて悪く、これにＰＡ１２を適宜配
合することによって成形性が向上し、かつ柔軟性も損な
われないという特徴を有しており、産業上の利用価値は
極めて高いものとなった。As described above, according to the present invention, a plurality of thermoplastic resins are selected as the synthetic resin forming the inner tube, and the mixing ratio thereof is optimized. In addition to exhibiting performance equal to or higher than that of the body, the tubular body itself could be imparted with flexibility.
Further, in the molding of the tube-shaped body, for example, TPU alone has extremely poor moldability, and by appropriately blending PA12 with this, the moldability is improved and the flexibility is not impaired. As a result, it has an extremely high utility value in industry.
Claims (3)
管状体であって、内管を形成する合成樹脂として、二種
類以上の熱可塑性樹脂を配合し、内管を押出成形してな
ることを特徴とする合成樹脂管状体。1. A synthetic resin tubular body comprising an inner pipe, a reinforcing ridge, and an outer coat layer, wherein two or more kinds of thermoplastic resins are mixed as the synthetic resin forming the inner pipe, and the inner pipe is extruded. A synthetic resin tubular body characterized in that
性ポリウレタン樹脂１００重量部に対し、他の熱可塑性
樹脂５〜９５０重量部を配合した請求項第１項記載の合
成樹脂管状体。2. The synthetic resin tubular body according to claim 1, wherein, as the synthetic resin forming the inner tube, 100 parts by weight of the thermoplastic polyurethane resin is mixed with 5 to 950 parts by weight of another thermoplastic resin.
樹脂が、熱可塑性ポリエステル樹脂、熱可塑性ポリアミ
ド樹脂である請求項第２項記載の合成樹脂管状体。3. The synthetic resin tubular body according to claim 2, wherein the resin mixed with the thermoplastic polyurethane resin is a thermoplastic polyester resin or a thermoplastic polyamide resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22816093A JPH0752288A (en) | 1993-08-20 | 1993-08-20 | Synthetic resin tubular body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22816093A JPH0752288A (en) | 1993-08-20 | 1993-08-20 | Synthetic resin tubular body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0752288A true JPH0752288A (en) | 1995-02-28 |
Family
ID=16872176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22816093A Pending JPH0752288A (en) | 1993-08-20 | 1993-08-20 | Synthetic resin tubular body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0752288A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2434797A (en) * | 2005-08-24 | 2007-08-08 | Allen Group Ltd | Coiled air hoses |
| EP2123817A1 (en) * | 2008-05-22 | 2009-11-25 | Electrolux Home Products Corporation N.V. | Laundry washing machine |
-
1993
- 1993-08-20 JP JP22816093A patent/JPH0752288A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2434797A (en) * | 2005-08-24 | 2007-08-08 | Allen Group Ltd | Coiled air hoses |
| GB2434797B (en) * | 2005-08-24 | 2009-08-12 | Allen Group Ltd | Coiled air hoses |
| EP2123817A1 (en) * | 2008-05-22 | 2009-11-25 | Electrolux Home Products Corporation N.V. | Laundry washing machine |
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