JP3128983B2 - Hose for automotive fuel piping - Google Patents

Hose for automotive fuel piping

Info

Publication number
JP3128983B2
JP3128983B2 JP04251722A JP25172292A JP3128983B2 JP 3128983 B2 JP3128983 B2 JP 3128983B2 JP 04251722 A JP04251722 A JP 04251722A JP 25172292 A JP25172292 A JP 25172292A JP 3128983 B2 JP3128983 B2 JP 3128983B2
Authority
JP
Japan
Prior art keywords
hose
layer
inner layer
thickness
resistance
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
Application number
JP04251722A
Other languages
Japanese (ja)
Other versions
JPH0699548A (en
Inventor
勉 小玉
和宏 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Riko Co Ltd
Original Assignee
Sumitomo Riko Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
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Application filed by Sumitomo Riko Co Ltd filed Critical Sumitomo Riko Co Ltd
Priority to JP04251722A priority Critical patent/JP3128983B2/en
Priority to US08/101,000 priority patent/US6024133A/en
Priority to DE69315499T priority patent/DE69315499T2/en
Priority to EP93112589A priority patent/EP0582302B1/en
Publication of JPH0699548A publication Critical patent/JPH0699548A/en
Application granted granted Critical
Publication of JP3128983B2 publication Critical patent/JP3128983B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】この発明は、ガソリン等の液体お
よび気体等の供給配管用に用いられる自動車燃料配管用
ホースに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose for an automobile fuel pipe used for a supply pipe for a liquid such as gasoline and a gas.

【0002】[0002]

【従来の技術】従来から、自動車等において使用される
燃料配管自身として、あるいはその連結用として用いら
れる燃料配管用ホースには、種々の材料およびこれを用
いて得られる様々な構造を有するものが使用されてい
る。例えば、フッ素樹脂層の外周にワイヤーでブレード
編みにより補強層が形成された構造のホースがあげられ
る。
2. Description of the Related Art Conventionally, fuel pipe hoses used in automobiles or the like or used for connecting fuel pipes have various materials and various structures obtained using the same. It is used. For example, there is a hose having a structure in which a reinforcing layer is formed by braiding with a wire around the fluororesin layer.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記フ
ッ素樹脂層の外周にワイヤーでブレード編みされた補強
層が形成されたホースは、そのフッ素樹脂自身が適度な
剛性を有し耐変形性を備え、また耐サワーガソリン性,
耐ガソリン透過性をも備えている。しかも、その外周に
はワイヤーのブレード編みによる補強層が形成されてい
るため良好な耐干渉性および耐衝撃性も備えている。し
かしながら、上記フッ素樹脂層は、材料が高価であり肉
厚を厚くするとコストが高くなるため、薄肉に形成され
る場合がある。このように、薄肉に形成すると、例えば
ガソリンの供給が一時的に遮断されると、ホース内が負
圧状態となり、ホースが変形するという問題が生じる。
However, a hose in which a reinforcing layer braided with a wire is formed on the outer periphery of the fluororesin layer, the fluororesin itself has appropriate rigidity and has deformation resistance. In addition, sour gasoline resistance,
It also has gasoline permeability resistance. In addition, since the reinforcing layer is formed on the outer periphery by braiding the wire, it also has good interference resistance and impact resistance. However, since the fluororesin layer is expensive and the cost increases when the thickness is increased, the fluororesin layer may be formed to be thin. If the gasket is formed to be thin as described above, for example, when the supply of gasoline is temporarily cut off, the inside of the hose is in a negative pressure state, which causes a problem that the hose is deformed.

【0004】この発明は、このような事情に鑑みなされ
たもので、耐サワーガソリン性,耐ガソリン透過性,耐
干渉性,耐衝撃性はもちろん、負圧時に変形することな
く、かつ低コストの自動車燃料配管用ホースの提供をそ
の目的とする。
[0004] The present invention has been made in view of such circumstances, and is not limited to sour gasoline resistance, gasoline permeation resistance, interference resistance, and impact resistance, but also does not deform at negative pressure and has a low cost. The purpose is to provide a hose for automobile fuel piping.

【0005】[0005]

【課題を解決するための手段】上記の目的を達成するた
め、この発明の自動車燃料配管用ホースは、内層と、上
記内層の外周に形成された外層とを備えた自動車燃料配
管用ホースであって、上記内層がフッ素系樹脂によって
形成され、上記外層がゴム弾性材によって形成され、か
つ上記外層の厚みが、内層の厚みを基準とし、内層の厚
みを1として5〜30に設定され、かつ、外層が、JI
S硬度で55Hs以上の硬度に設定されているという構
成をとる。
In order to achieve the above object, a hose for an automotive fuel pipe according to the present invention is a hose for an automotive fuel pipe having an inner layer and an outer layer formed on the outer periphery of the inner layer. The inner layer is formed of a fluororesin, the outer layer is formed of a rubber elastic material, and the thickness of the outer layer is set to 5 to 30 with the thickness of the inner layer being 1, based on the thickness of the inner layer , and , The outer layer is JI
The hardness is set to 55 Hs or more in S hardness .

【0006】[0006]

【作用】すなわち、本発明者らは、各種耐性はもちろ
ん、優れた耐変形性を有し、しかも低コストの燃料配管
用ホースを得るために一連の研究を重ねた。その結果、
内層の形成材料に各種耐性に優れたフッ素系樹脂を用
い、上記内層の外周にゴム弾性材からなる外層を形成
し、かつ上記外層の厚みを内層を基準に所定値に限定し
て内層を薄肉に形成するとともに、外層の硬度を所定値
に設定すると、適度な剛性を有して耐変形性が向上し、
しかも低コスト化が図れるようになることを見出しこの
発明に到達した。
That is, the present inventors have conducted a series of studies to obtain a low-cost fuel pipe hose having not only various resistances but also excellent deformation resistance. as a result,
Using a fluorine-based resin excellent in various resistances as the material for forming the inner layer, forming an outer layer made of a rubber elastic material on the outer periphery of the inner layer, and limiting the thickness of the outer layer to a predetermined value based on the inner layer to make the inner layer thinner formed on the both predetermined value hardness of the outer layer
When set to, it has moderate rigidity and improves deformation resistance,
In addition, they found that the cost could be reduced, and reached the present invention.

【0007】つぎに、この発明を詳しく説明する。Next, the present invention will be described in detail.

【0008】この発明の自動車燃料配管用ホースは、フ
ッ素系樹脂で内層を形成し、上記内層の外周にゴム弾性
材で外層を形成することにより得られる。
The automotive fuel pipe hose of the present invention is obtained by forming an inner layer of a fluorine resin and forming an outer layer of a rubber elastic material on the outer periphery of the inner layer.

【0009】上記内層形成材料であるフッ素系樹脂とし
ては、ポリビニリデンフルオライド(PVDF),ポリ
クロロトリフルオロエチレン(CTFE),エチレンと
クロロトリフルオロエチレンの共重合体(ECTF
E),エチレンとテトラフルオロエチレンの共重合体
(ETFE),ヘキサフルオロプロピレンとテトラフル
オロエチレンの共重合体(FEP),ヘキサフルオロプ
ロピレンとテトラフルオロエチレンとビニリデンフルオ
ライドの共重合体(THV),フッ化アルコキシエチレ
ン樹脂(PFA),ポリテトラフルオロエチレン(PT
FE)等があげられる。
Examples of the fluorine resin as the inner layer forming material include polyvinylidene fluoride (PVDF), polychlorotrifluoroethylene (CTFE), and a copolymer of ethylene and chlorotrifluoroethylene (ECTF).
E), a copolymer of ethylene and tetrafluoroethylene (ETFE), a copolymer of hexafluoropropylene and tetrafluoroethylene (FEP), a copolymer of hexafluoropropylene, tetrafluoroethylene and vinylidene fluoride (THV), Fluoroalkoxyethylene resin (PFA), polytetrafluoroethylene (PT
FE) and the like.

【0010】上記外層形成材料であるゴム弾性材として
は、NBR系ゴム,ECO,CSM,ゴム状塩素化ポリ
エチレン(CPE),アクリルゴム(ACM),クロロ
プレンゴム(CR),NBRと塩化ビニル樹脂(PV
C)の混合物,EPDM,イソブチレン−イソプレンゴ
ム(IIR),ハロゲン化ブチルゴム,オレフィン系熱
可塑エラストマー,塩ビ系熱可塑エラストマー,スチレ
ン系熱可塑エラストマー,ウレタン系熱可塑エラストマ
ー等があげられる。
As the rubber elastic material as the outer layer forming material, NBR rubber, ECO, CSM, rubbery chlorinated polyethylene (CPE), acrylic rubber (ACM), chloroprene rubber (CR), NBR and vinyl chloride resin ( PV
C), EPDM, isobutylene-isoprene rubber (IIR), halogenated butyl rubber, olefin-based thermoplastic elastomer, vinyl chloride-based thermoplastic elastomer, styrene-based thermoplastic elastomer, urethane-based thermoplastic elastomer, and the like.

【0011】この発明の自動車燃料配管用ホースは、例
えばつぎのようにして製造される。すなわち、まず、フ
ッ素系樹脂を用いてマンドレル上に押出成形機から押し
出して内層管状体を得る。つぎに、上記内層管状体の外
周面に、ゴム弾性材を押し出して外層を形成する。そし
て、加熱加硫することによって一体化してマンドレルを
抜き取ることにより、2層構造の自動車燃料配管用ホー
スを製造することができる。この場合の加硫条件は、通
常、温度150〜160℃,時間30〜60分に設定さ
れる。
The automotive fuel pipe hose of the present invention is manufactured, for example, as follows. That is, first, an inner layer tubular body is obtained by extruding a mandrel using a fluororesin from an extruder. Next, an outer layer is formed by extruding a rubber elastic material on the outer peripheral surface of the inner layer tubular body. Then, by heating and vulcanizing, the mandrel is integrated and the mandrel is pulled out, whereby a two-layered automotive fuel pipe hose can be manufactured. The vulcanization conditions in this case are usually set to a temperature of 150 to 160 ° C. and a time of 30 to 60 minutes.

【0012】このようにして得られる自動車燃料配管用
ホースを図1に示す。図において、1はフッ素系樹脂か
らなる内層、2はゴム弾性材からなる外層を示してい
る。そして、この発明の自動車燃料配管用ホースでは、
内層1の厚みを基準とし、内層の厚みを1として上記外
層2の厚みを5〜30に設定する必要がある。このよう
に、内層1の厚みを外層2よりも薄肉に形成することに
より、耐変形性を備えながら、高価なフッ素系樹脂の使
用量を制限することが可能となって、低コスト化が実現
できる。具体的には、内層1が0.1〜0.2mmの範
囲内、外層2が2〜3mmの範囲内に設定することが好
ましい。そして、上記厚みの設定に加えて、外層2の硬
度をJIS硬度で55Hs以上に設定する必要があり、
好ましくは60〜75Hsである。上記外層2の肉厚と
硬度の関係を図2に示す。図において、領域Aが肉厚と
硬度とのバランスが良好な領域であって、図2から外層
2の肉厚が2mm近傍では硬度が60〜75Hsで良好
となる。
FIG. 1 shows an automotive fuel pipe hose obtained in this manner. In the drawing, reference numeral 1 denotes an inner layer made of a fluororesin, and 2 denotes an outer layer made of a rubber elastic material. And in the hose for automobile fuel piping of the present invention,
Based on the thickness of the inner layer 1, the thickness of the outer layer 2 needs to be set to 5 to 30 with the thickness of the inner layer being 1. As described above, by forming the thickness of the inner layer 1 to be thinner than that of the outer layer 2, it is possible to limit the amount of expensive fluorine-based resin used while having deformation resistance, thereby realizing cost reduction. it can. Specifically, it is preferable that the inner layer 1 is set within a range of 0.1 to 0.2 mm and the outer layer 2 is set within a range of 2 to 3 mm. Then, in addition to the setting of the thickness, it is necessary to set the hardness of the outer layer 2 to 55 Hs or more in JIS hardness ,
Preferably it is 60 to 75 Hs. FIG. 2 shows the relationship between the thickness of the outer layer 2 and the hardness. In the figure, a region A is a region in which the balance between the thickness and the hardness is good, and from FIG. 2, when the thickness of the outer layer 2 is around 2 mm, the hardness is good at 60 to 75 Hs.

【0013】なお、上記外層2の外周に、さらに補強糸
を用いて繊維補強層を形成してもよい。上記繊維補強層
は、ナイロン繊維,ポリエステル繊維,アラミド繊維等
の合成繊維や綿繊維等の天然繊維を主体とする糸のブレ
ード編みやスパイラル編み等によって形成される。この
ように、繊維補強層を設けることにより、フィラメント
中に空気層が形成され断熱性が向上し、ホース外部から
の高熱を遮断し、ホース内部を流れる燃料等に対する影
響を軽減することが可能となる。
A fiber reinforcing layer may be further formed on the outer periphery of the outer layer 2 by using a reinforcing yarn. The fiber reinforcing layer is formed by braiding or spiral knitting of a yarn mainly composed of synthetic fibers such as nylon fibers, polyester fibers, and aramid fibers, and natural fibers such as cotton fibers. Thus, by providing the fiber reinforcement layer, an air layer is formed in the filament, the heat insulation property is improved, high heat from the outside of the hose is cut off, and the influence on the fuel flowing inside the hose can be reduced. Become.

【0014】[0014]

【発明の効果】以上のように、この発明の自動車燃料配
管用ホースは、内層の形成材料にフッ素系樹脂を用い、
上記内層の外周にゴム弾性材からなる外層を形成し、か
つ外層の厚みを内層を基準に所定値に限定して内層を薄
肉に形成するとともに、外層の硬度を所定値に設定した
ものである。したがって、内層が各種耐性に優れたフッ
素性樹脂からなるため、耐ガソリン透過性,耐サワーガ
ソリン性,耐干渉性,耐衝撃性等に優れ、しかもフッ素
系樹脂からなる内層が薄肉となるため、高価なフッ素系
樹脂の使用量を抑制することで低コスト化が実現する。
また、例えばガソリンの供給が一時的に遮断された等の
ようにホース内が負圧状態となっても、フッ素系樹脂か
らなる内層が適度な剛性および適度なゴム弾性を備えて
いるため、ホース自体が変形することもない。このよう
に、この発明の自動車燃料配管用ホースは、各種耐性能
力を劣化させることなく、耐変形性に優れ、しかも低コ
スト化がなされたものである。さらに、2層構造からな
るため、製造工程も容易となる。
As described above, the automotive fuel piping hose of the present invention uses a fluorine resin as a material for forming the inner layer.
An outer layer made of a rubber elastic material is formed on the outer periphery of the inner layer, and the thickness of the outer layer is limited to a predetermined value based on the inner layer to form the inner layer thin, and the hardness of the outer layer is set to a predetermined value. . Therefore, since the inner layer is made of a fluororesin having various resistances, it has excellent gasoline permeation resistance, sour gasoline resistance, interference resistance, impact resistance, and the like, and the inner layer made of the fluororesin has a small thickness. Cost reduction is realized by suppressing the amount of expensive fluororesin used.
Further, even when the inside of the hose is in a negative pressure state, for example, when the supply of gasoline is temporarily shut off, the inner layer made of the fluororesin has appropriate rigidity and appropriate rubber elasticity. It does not deform itself. As described above, the hose for an automotive fuel pipe of the present invention is excellent in deformation resistance without deteriorating various resistance capabilities, and is reduced in cost. In addition, since it has a two-layer structure, the manufacturing process is also facilitated.

【0015】つぎに、実施例について比較例と併せて説
明する。
Next, examples will be described together with comparative examples.

【0016】[0016]

【実施例1〜4】下記の表1および表2に示す材料を用
い、前記の製法に従って目的とする2層構造の自動車燃
料配管用ホース(内径6mm)を作製した。なお、外層
の硬度(JIS硬度)も同表に併せて示した。
Examples 1 to 4 Using the materials shown in Tables 1 and 2 below, hoses (inner diameter: 6 mm) having the desired two-layer structure were prepared in accordance with the above-mentioned method. The hardness (JIS hardness) of the outer layer is also shown in the table.

【0017】[0017]

【表1】 [Table 1]

【0018】[0018]

【表2】 [Table 2]

【0019】[0019]

【比較例1】ナイロン11を用い、押出機によって単層
構造のホースを作製した。
Comparative Example 1 A hose having a single-layer structure was produced by using an extruder using nylon 11.

【0020】[0020]

【比較例2】フッ素系樹脂(PVDF)を用い、これを
押出機によって押し出して厚み0.4mmのフッ素系樹
脂の単層構造を形成し、この外周にワイヤーを用いてブ
レード編みにより補強層を形成して2層構造のホースを
作製した。
[Comparative Example 2] A fluororesin (PVDF) was extruded by an extruder to form a single layer structure of a 0.4 mm thick fluororesin, and a reinforcing layer was braided with a wire around the outer periphery by braiding. This was formed into a two-layer hose.

【0021】このようにして得られた実施例1〜4品お
よび比較例1,2品のホースについて、破裂圧力,耐ガ
ソリン透過性,耐サワーガソリン性,耐変形性について
測定し評価した。その結果を下記の表3〜表5に示す。
なお、上記特性は下記の評価方法にしたがって測定し
た。
The hoses of Examples 1 to 4 and Comparative Examples 1 and 2 thus obtained were measured and evaluated for burst pressure, gasoline resistance, sour gasoline resistance and deformation resistance. The results are shown in Tables 3 to 5 below.
The above characteristics were measured according to the following evaluation methods.

【0022】〔破裂圧力〕 ホースが破裂するまで連続加圧(水圧)を行い、ホース
が破裂またはピンホールによる漏れの発生までの最高圧
力を測定した。
[Burst pressure] Continuous pressurization (water pressure) was performed until the hose burst, and the maximum pressure until the hose burst or leak due to pinholes was measured.

【0023】〔耐ガソリン透過性〕 試験用ガソリンと、試験用ガソリンとメタノールを5
0:50(容量比)の割合で混合した混合ガソリンの2
種類を準備した。そして、これらを各ホース内に封入
し、40℃の温度下に放置して、その重量減少量(g/
2 ・day)を測定した。一方、実施例品および比較
例品のホースと同一内径で、内層がフッ素系ゴム(FK
M)、中間層がECOで、上記中間層の外周にECOか
らなる最外層が形成され、かつ上記中間層と最外層との
間に補強糸からなる補強層が形成された従来のホースを
用いて上記と同様の測定を行った。そして、上記従来の
ホースの測定値を1とし、これを基準に上記実施例品お
よび比較例品のホースの耐ガソリン透過性を表示した。
[Gasoline Permeation Resistance] A test gasoline, a test gasoline and methanol
2 of mixed gasoline mixed at a ratio of 0:50 (volume ratio)
Prepared the kind. These are sealed in each hose and left at a temperature of 40 ° C. to reduce the weight loss (g / g).
m 2 · day) was measured. On the other hand, the inner diameter of the hose is the same as that of the hoses of the example and comparative examples, and the inner layer is made of a fluorine-based rubber (FK
M) using a conventional hose in which the intermediate layer is ECO, an outermost layer made of ECO is formed around the intermediate layer, and a reinforcing layer made of reinforcing yarn is formed between the intermediate layer and the outermost layer. The same measurement as above was performed. The measured value of the conventional hose was set to 1, and the gasoline permeation resistance of the hoses of the above-described example and comparative examples was displayed based on the measured value.

【0024】〔耐サワーガソリン性〕 ホースの中をサワーガソリンを循環させ、ホース内面に
発生するクラック等の異常を確認した。条件は、温度4
0〜60℃、循環圧力は2.5kgf/cm2であっ
た。その結果、全く異常が確認されなかったものを◎、
ほとんど異常が確認されなかったものを○、異常が確認
されたものを×とした。
[Sour Gasoline Resistance] Sour gasoline was circulated in the hose, and abnormalities such as cracks generated on the inner surface of the hose were confirmed. Conditions are temperature 4
The temperature was 0 to 60 ° C, and the circulation pressure was 2.5 kgf / cm 2 . As a result, those for which no abnormality was confirmed at all ◎,
A sample where almost no abnormality was confirmed was evaluated as ○, and a case where abnormality was confirmed was evaluated as ×.

【0025】〔耐変形性〕 ホースの中を負圧状態(−600mmHg)にして、ホ
ースが閉塞したものを×、ほとんど異常が確認されなか
ったものを○、まったく異常が確認されなかったものを
◎とした。
[Deformation resistance] A hose was closed under a negative pressure (-600 mmHg), and the hose was clogged. ×: almost no abnormalities were observed. ○: no abnormalities were observed. ◎

【0026】[0026]

【表3】 [Table 3]

【0027】[0027]

【表4】 [Table 4]

【0028】[0028]

【表5】 [Table 5]

【0029】上記表3〜表5の結果から、比較例品1品
は耐サワーガソリン性に劣っており、また比較例2品は
耐変形性に劣っていることがわかる。これに対して、実
施例品はいずれも耐ガソリン透過性,耐サワーガソリン
性および耐変形性に対して優れた性能を有していること
がわかる。しかも、内層であるフッ素系樹脂の厚みを薄
いままで上記のような良好な性能を有しており、高価な
フッ素系樹脂の使用量を抑制することでき、低コスト化
を図ることが可能となる。
From the results in Tables 3 to 5, it can be seen that the product of Comparative Example 1 is inferior in sour gasoline resistance and the product of Comparative Example 2 is inferior in deformation resistance. On the other hand, it can be seen that all of the examples have excellent performances in gasoline permeation resistance, sour gasoline resistance and deformation resistance. Moreover, it has the above-mentioned good performance while keeping the thickness of the fluorine resin as the inner layer thin, so that the amount of expensive fluorine resin to be used can be suppressed, and cost reduction can be achieved. Become.

【図面の簡単な説明】[Brief description of the drawings]

【図1】この発明の自動車燃料配管用ホースを示す断面
図である。
FIG. 1 is a sectional view showing an automotive fuel pipe hose of the present invention.

【図2】外層の肉厚(mm)と硬度(Hs)の関係を示
す曲線図である。
FIG. 2 is a curve diagram showing a relationship between a thickness (mm) of an outer layer and a hardness (Hs).

【符号の説明】[Explanation of symbols]

1 内層 2 外層 1 inner layer 2 outer layer

フロントページの続き (56)参考文献 特開 平5−44874(JP,A) 特開 平2−24137(JP,A) 特開 昭60−52336(JP,A) 特開 昭60−52335(JP,A) 実開 平4−73683(JP,U) 実開 昭61−157785(JP,U) (58)調査した分野(Int.Cl.7,DB名) B32B 1/00 - 35/00 F16L 9/00 - 9/22 F16L 11/00 - 11/24 EPAT(QUESTEL) WPI/L(QUESTEL)Continuation of the front page (56) References JP-A-5-44874 (JP, A) JP-A-2-24137 (JP, A) JP-A-60-52336 (JP, A) JP-A-60-52335 (JP) , A) Japanese Utility Model Hei 4-73683 (JP, U) Japanese Utility Model Application Showa 61-157785 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) B32B 1/00-35/00 F16L 9/00-9/22 F16L 11/00-11/24 EPAT (QUESTEL) WPI / L (QUESTEL)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 内層と、上記内層の外周に形成された外
層とを備えた自動車燃料配管用ホースであって、上記内
層がフッ素系樹脂によって形成され、上記外層がゴム弾
性材によって形成され、かつ上記外層の厚みが、内層の
厚みを基準とし、内層の厚みを1として5〜30に設定
され、かつ、外層が、JIS硬度で55Hs以上の硬度
に設定されていることを特徴とする自動車燃料配管用ホ
ース。
1. An automotive fuel pipe hose comprising: an inner layer; and an outer layer formed on an outer periphery of the inner layer, wherein the inner layer is formed of a fluororesin, and the outer layer is formed of a rubber elastic material, And the thickness of the outer layer is set to 5 to 30 with the thickness of the inner layer being 1, based on the thickness of the inner layer.
And the outer layer has a hardness of 55 Hs or more in JIS hardness
Hose for automotive fuel piping, characterized in that it is set to:
JP04251722A 1979-08-07 1992-09-21 Hose for automotive fuel piping Expired - Lifetime JP3128983B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP04251722A JP3128983B2 (en) 1992-09-21 1992-09-21 Hose for automotive fuel piping
US08/101,000 US6024133A (en) 1979-08-07 1993-08-03 Fuel transporting hose having inner layer made of fluorine-contained resin
DE69315499T DE69315499T2 (en) 1992-08-07 1993-08-05 Fuel transport hose with an inner layer made of fluorine-containing resin
EP93112589A EP0582302B1 (en) 1992-08-07 1993-08-05 Fuel transporting hose having inner layer made of fluorine-contained resin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP04251722A JP3128983B2 (en) 1992-09-21 1992-09-21 Hose for automotive fuel piping

Publications (2)

Publication Number Publication Date
JPH0699548A JPH0699548A (en) 1994-04-12
JP3128983B2 true JP3128983B2 (en) 2001-01-29

Family

ID=17227012

Family Applications (1)

Application Number Title Priority Date Filing Date
JP04251722A Expired - Lifetime JP3128983B2 (en) 1979-08-07 1992-09-21 Hose for automotive fuel piping

Country Status (1)

Country Link
JP (1) JP3128983B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101805775B (en) * 2010-04-12 2012-03-14 赵雨 Method for preparing collagen from deer sinew

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5588469A (en) * 1994-10-17 1996-12-31 Marugo Rubber Industries, Ltd. Hose for automotive fuel piping
US6279615B1 (en) 1999-09-03 2001-08-28 Tokai Rubber Industries, Ltd. Fuel hose
JP5231044B2 (en) * 2007-03-23 2013-07-10 東海ゴム工業株式会社 Fuel hose

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101805775B (en) * 2010-04-12 2012-03-14 赵雨 Method for preparing collagen from deer sinew

Also Published As

Publication number Publication date
JPH0699548A (en) 1994-04-12

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