JPH03184817A - Multi-layer tube joint - Google Patents
Multi-layer tube jointInfo
- Publication number
- JPH03184817A JPH03184817A JP1325682A JP32568289A JPH03184817A JP H03184817 A JPH03184817 A JP H03184817A JP 1325682 A JP1325682 A JP 1325682A JP 32568289 A JP32568289 A JP 32568289A JP H03184817 A JPH03184817 A JP H03184817A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- inner layer
- outer layer
- tube
- tube joint
- 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
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 17
- 229920002530 polyetherether ketone Polymers 0.000 claims description 17
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 3
- 239000004697 Polyetherimide Substances 0.000 abstract description 4
- 229920001601 polyetherimide Polymers 0.000 abstract description 4
- 229920001643 poly(ether ketone) Polymers 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000004721 Polyphenylene oxide Substances 0.000 description 8
- 229920000570 polyether Polymers 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 5
- 150000002825 nitriles Chemical class 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 229920006351 engineering plastic Polymers 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 239000004695 Polyether sulfone Substances 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920002492 poly(sulfone) Polymers 0.000 description 2
- 229920006393 polyether sulfone Polymers 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Joints With Pressure Members (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、給水管、給湯管等を接続するために用いられ
る多層管継手に関し、更に詳しくは耐熱性、耐薬品性等
に優れた樹脂製の多層管継手に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a multilayer pipe joint used to connect water supply pipes, hot water supply pipes, etc. Regarding multilayer pipe joints made by
（従来の技術）
給水管、給湯管等を接続する管継手としては、金属製の
もの、塩化ビニル樹脂等の汎用樹脂製のもの、ポリエー
テルイ果ド、ポリエーテルエーテルケトン等のいわゆる
エンジニアリングプラスチック製のもの等が提案されて
いる。(Prior art) Pipe fittings for connecting water supply pipes, hot water supply pipes, etc. are made of metal, general-purpose resins such as vinyl chloride resin, and so-called engineering plastics such as polyether oxide and polyether ether ketone. etc. have been proposed.
金属製の管継手は、生産性が悪く、コスト面で不利であ
る。しかも、錆の問題を有しているので、耐水性、耐熱
水性、耐薬品性、耐候性等に劣り、さらに重いという欠
点もある。Metal pipe fittings have poor productivity and are disadvantageous in terms of cost. Furthermore, since it has the problem of rust, it has poor water resistance, hot water resistance, chemical resistance, weather resistance, etc., and also has the disadvantage of being heavy.
汎用樹脂製の管継手は、比較的軟化点が低いため、耐熱
性、応力下での耐熱水性に劣る。Pipe fittings made of general-purpose resin have a relatively low softening point, so they have poor heat resistance and hot water resistance under stress.
エンジニアリングプラスチックのうち、ポリエーテルイ
短ドで形成された管継手は、上記汎用樹脂製の管継手に
比して耐熱性、力学特性は優れている。しかし、この管
継手においても応力下での耐熱性、耐熱水性が充分でな
い。一方、ポリエーテルエーテルケトン又はポリエーテ
ルニトリルは高い融点を有しているため、この樹脂で形
成された管継手は、耐熱性、耐熱水性、耐薬品性等に極
めて優れている。しかし、ポリエーテルエーテルケトン
は着色（灰緑色）しているため、管継手を自由に着色で
きないという欠点があり、またコストも高い。Among engineering plastics, pipe joints made of short polyether resin have superior heat resistance and mechanical properties compared to pipe joints made of general-purpose resins. However, this pipe joint also lacks sufficient heat resistance under stress and hot water resistance. On the other hand, since polyetheretherketone or polyethernitrile has a high melting point, pipe fittings made of this resin have extremely excellent heat resistance, hot water resistance, chemical resistance, and the like. However, since polyetheretherketone is colored (gray-green), it has the disadvantage that pipe fittings cannot be colored freely, and it is also expensive.
そこで、本発明者等は、軽量で、生産性に優れ、かつ強
度、耐熱性、耐熱水性、成形性、耐薬品性に優れている
上に、着色が任意に行え、さらに比較的安価に提供する
ことができる樹脂製の多層管継手として、流体に接する
筒状の内層と、内層の外側に設けられた筒状の外層とを
有し、該内層がポリエーテルエーテルケトン又はポリエ
ーテルニトリルを主成分とする材料にて形成され、該外
層がポリエーテルエーテルケトン又はポリエーテルニト
リル以外の樹脂を主成分とする材料にて形成されている
多層構造の管継手を提案した。Therefore, the present inventors have developed a product that is lightweight, has excellent productivity, has excellent strength, heat resistance, hot water resistance, moldability, and chemical resistance, can be colored as desired, and is relatively inexpensive. A multilayer pipe fitting made of resin that can be used as a multi-layer pipe joint has a cylindrical inner layer in contact with the fluid and a cylindrical outer layer provided outside the inner layer, and the inner layer is mainly made of polyether ether ketone or polyether nitrile. We have proposed a multilayer pipe joint in which the outer layer is made of a material whose main component is a resin other than polyetheretherketone or polyethernitrile.
（発明が解決しようとする課題）
しかし、このような多層管継手においても次に述べるよ
うな問題があって改良の余地がある。(Problems to be Solved by the Invention) However, such multilayer pipe joints also have the following problems, and there is room for improvement.
該多層管継手において内層と外層との間の接着力が弱い
場合には、何らかの外力によって内層と外層とが剥離し
て内外層は相互に回転できる状態となる。従って、例え
ばシール部を有する内層が回転すると、シール部におけ
るシール効果が不十分となって安定した止水性が得られ
ないという問題がある。If the adhesive force between the inner layer and the outer layer in the multilayer pipe joint is weak, the inner layer and the outer layer will peel off due to some external force, and the inner and outer layers will be able to rotate relative to each other. Therefore, for example, when the inner layer having the seal portion rotates, there is a problem in that the sealing effect at the seal portion becomes insufficient and stable water-stopping properties cannot be obtained.
本発明は、本発明者等が提案した多層管継手に改良を加
え、上記問題をも解決することができる多層管継手を提
供することを目的としている。The present invention aims to improve the multilayer pipe joint proposed by the present inventors and to provide a multilayer pipe joint that can also solve the above problems.
（課題を解決するための手段）
本発明の多層管継手は、流体に接する筒状の内層と、内
層の外側に設けられた筒状の外層とを有し、該内層がポ
リエーテルエーテルケトン又はポリエーテルニトリルを
主成分とする材料にて形成され、該外層がポリエーテル
エーテルケトン又はポリエーテルニトリル以外の樹脂を
主成分とする材料にて形成されている多層構造の管継手
であって、・該内層と該外層との境界には凹凸部が形成
されており、そのことにより上記目的が達成される。(Means for Solving the Problems) The multilayer pipe joint of the present invention has a cylindrical inner layer in contact with a fluid, and a cylindrical outer layer provided outside the inner layer, and the inner layer is made of polyether ether ketone or A pipe joint with a multilayer structure, which is formed from a material whose main component is polyether nitrile, and whose outer layer is formed from a material whose main component is polyether ether ketone or a resin other than polyether nitrile, An uneven portion is formed at the boundary between the inner layer and the outer layer, thereby achieving the above object.
本発明における内層と外層との境界の凹凸部とは、軸方
向と直交する断面まわりの周方向にわたって外層側が部
分的に突出するものであってもよく、内層側が部分的に
突出するものであってもよい。また軸方向と斜交する断
面まわりの周方向にわたって外層側または内層側が部分
的に突出するものであってもよい。この場合、その突出
部を全体的にみれば、格子状になっていてもよい。また
いずれの場合も、突出部は尖っていても丸みを帯びてい
てもよい。このように、上記凹凸部の形態は種々のもの
が考えられる。In the present invention, the uneven portion at the boundary between the inner layer and the outer layer may be such that the outer layer side partially protrudes over the circumferential direction around the cross section perpendicular to the axial direction, and the inner layer side may partially protrude. You can. Further, the outer layer side or the inner layer side may partially protrude over the circumferential direction around the cross section obliquely intersecting the axial direction. In this case, the protrusion may have a lattice shape when viewed as a whole. In either case, the protrusion may be pointed or rounded. In this way, various forms of the uneven portions can be considered.
本発明で使用されるポリエーテルエーテルケトン（以下
、ＰＥＥＫという）とは、■ｃ■社が開発した特殊エン
ジニアリングプラスチックであり、その融点は３３４℃
である。ＰＥＥＫは軽量であって、耐熱性、耐熱水性、
耐薬品性等の諸物性に優れている。Polyetheretherketone (hereinafter referred to as PEEK) used in the present invention is a special engineering plastic developed by ■c■ Company, and its melting point is 334°C.
It is. PEEK is lightweight, heat resistant, hot water resistant,
Excellent physical properties such as chemical resistance.
ＰＲＥには以下の繰り返し単位を有した構造を持つ。PRE has a structure having the following repeating units.
ＰＥＥＫノ市販品は、ＶＩＣＴＲｌｌｔＸ ＰＥＥＫ
（ＩＣ１社商品名）があげられる。Commercially available PEEK products include VICTRlltX PEEK
(IC1 company product name) is mentioned.
本発明で使用されるポリエーテルニトリルとは、出光興
産■が開発した特殊エンジニアリングプラスチックであ
り、その融点は３４０°Ｃである。ポリエーテルニトリ
ルは軽量であって耐熱性、耐熱水性、耐薬品性等の諸物
性に優れている。ポリエーテルニトリルは、以下の繰り
返し単位を有した構造を持つ。The polyether nitrile used in the present invention is a special engineering plastic developed by Idemitsu Kosan, and its melting point is 340°C. Polyether nitrile is lightweight and has excellent physical properties such as heat resistance, hot water resistance, and chemical resistance. Polyethernitrile has a structure having the following repeating units.
ポリエーテルニトリルの市販品としては、Ｉ Ｄ３００
（出光興産■商品名）がある。A commercially available product of polyethernitrile is ID300.
(Idemitsu Kosan product name).
内層を形成する材料には、ＰＥＥＫ又はポリエーテルニ
トリルを主成分とし他の添加剤を含有してもよい。The material forming the inner layer may contain PEEK or polyethernitrile as a main component and may contain other additives.
外層を形成する酸形材料に含有される樹脂としては、例
えば、ポリアミド、ポリエチレン、ポリプロピレン、ポ
リブチレンテレフタレート、ポリ塩化ビニル、ポリアセ
タール、ポリカーボネート、ポリエーテルスルフォン、
ポリフェニレンオキシド、ポリフェニレンスルフィド、
ポリスルホン、ポリエーテルイミド等の樹脂があげられ
、特に、ポリエーテルイミド、ポリスルホン、ポリエー
テルスルフォン、ポリフェニレンスルフィドが好ましい
。これらの樹脂は、耐熱性、耐候性、耐圧性、耐衝撃性
も比較的硬れており、着色が可能である。Examples of the resin contained in the acid type material forming the outer layer include polyamide, polyethylene, polypropylene, polybutylene terephthalate, polyvinyl chloride, polyacetal, polycarbonate, polyether sulfone,
polyphenylene oxide, polyphenylene sulfide,
Examples include resins such as polysulfone and polyetherimide, with polyetherimide, polysulfone, polyethersulfone, and polyphenylene sulfide being particularly preferred. These resins have relatively hard heat resistance, weather resistance, pressure resistance, and impact resistance, and can be colored.
また、各成形材料には、補強のための充填剤、着色剤、
老化防止剤等が必要に応して添加される。In addition, each molding material contains fillers for reinforcement, colorants,
Anti-aging agents and the like are added as necessary.
（実施例） 以下、本発明を実施例に基づいて具体的に説明する。(Example) Hereinafter, the present invention will be specifically explained based on Examples.
第１図に示すように、本発明の多層管継手Ａはポリエー
テルエーテルケトンよりなる円筒状の内層１と該内層１
の外側に接着されたポリエーテルイミドよりなる円筒状
の外層２とを有している。As shown in FIG. 1, the multilayer pipe joint A of the present invention includes a cylindrical inner layer 1 made of polyetheretherketone, and a cylindrical inner layer 1 made of polyetheretherketone.
A cylindrical outer layer 2 made of polyetherimide is bonded to the outside of the cylindrical outer layer 2.
該内層１の外周面の軸方向中央部には、外層２の基部を
嵌め込む凹溝１Ａが全周にわたって設けられている。該
凹溝ｌＡには、第２図に示すように軸方向と直交する断
面まわりの円周４箇所に外層２側へ突出する短円柱状突
起１ａが設けられ、しかもこれら４個の突起１ａからな
るグループは、軸方向にわたっても複数箇所（本実施例
では５箇所）に設けられている。このように多数の突起
１ａが内層１の凹溝ＩＡに設けられているため、結果的
に、内層１と外層２との境界には凹凸部が形成された状
態となっている。A groove 1A into which the base of the outer layer 2 is fitted is provided at the axial center of the outer peripheral surface of the inner layer 1 over the entire circumference. As shown in FIG. 2, the groove lA is provided with short cylindrical protrusions 1a protruding toward the outer layer 2 at four locations on the circumference around the cross section perpendicular to the axial direction, and furthermore, from these four protrusions 1a, These groups are provided at a plurality of locations (five locations in this embodiment) in the axial direction as well. Since a large number of protrusions 1a are provided in the grooves IA of the inner layer 1 in this way, as a result, an uneven portion is formed at the boundary between the inner layer 1 and the outer layer 2.
該内層１の外周面の軸方向両端部には環状溝５が形成さ
れ、該環状溝５内にパツキン６が嵌着されている。An annular groove 5 is formed at both axial ends of the outer peripheral surface of the inner layer 1, and a packing 6 is fitted into the annular groove 5.
このような多層管継手Ａを用いて一対の管７．７を接続
するには、第１図に示すように、多層性継手Ａの両端部
にそれぞれスリットリング８および袋ナツト９を嵌合し
、多層管継手Ａの端部外面とスリットリング８との間に
管７の端部を挿入し、そして袋ナツト９をスリットリン
グ８に螺合することにより、スリットリング８の軸方向
のスリットが設けられた小径部で管７の端部を変形させ
て多層管継手Ａ外面との間で管７の端部を挟持する。In order to connect a pair of pipes 7.7 using such a multilayer joint A, as shown in FIG. By inserting the end of the pipe 7 between the outer surface of the end of the multilayer pipe joint A and the slit ring 8, and screwing the cap nut 9 onto the slit ring 8, the slit in the axial direction of the slit ring 8 is formed. The end of the tube 7 is deformed by the small diameter portion provided, and the end of the tube 7 is held between the outer surface of the multilayer pipe joint A and the outer surface of the multilayer pipe joint A.
このような本発明の多層管継手においては、内層１と外
層２との境界に多数の突起１ａよりなる凹凸部が形成さ
れているため、内層１と外層２との接着力が弱い場合で
あっても、内層１と外層２とは該凹凸部によって絡み合
い、内層１と外層２との接着力の弱さを補うこととなる
。従って、何らかの外力が作用しても内層１と外層とが
剥離して内外層が相互に回転するという事態が回避され
、従来の問題も解決される。In such a multilayer pipe joint of the present invention, since the uneven portion consisting of a large number of protrusions 1a is formed at the boundary between the inner layer 1 and the outer layer 2, there is a possibility that the adhesive force between the inner layer 1 and the outer layer 2 is weak. However, the inner layer 1 and the outer layer 2 are intertwined with each other by the uneven portions, thereby compensating for the weak adhesive force between the inner layer 1 and the outer layer 2. Therefore, even if some external force is applied, the situation where the inner layer 1 and the outer layer are separated and the inner and outer layers rotate relative to each other is avoided, and the conventional problem is also solved.
なお、内層１と外層２とを積層形成する方法としては、
先ず外層２を成形・加工した後、インサート方式にて内
層ｌを射出成形する方法、内層ｌを射出成形した後、そ
のまわりに外層２を射出成形する方法が挙げられる。Note that the method for laminating the inner layer 1 and outer layer 2 is as follows:
Examples include a method of first molding and processing the outer layer 2 and then injection molding the inner layer 1 using an insert method, and a method of injection molding the inner layer 1 and then injection molding the outer layer 2 around it.
（別実施例）
上記実施例では、内層１と外層２との境界の凹凸部は、
内層Ｉに短円柱状の突起１ａを突出させることによって
形成したが、第３図に示すように内層ｌに半球状の突起
１ａを突出させることによって形成してもよく、第４図
に示すように内層１に円錐状の突起１ａを突出させるこ
とによって形成してもよく、第５図に示すように内層１
に凹部１ｂを設けることによって形成（この場合は外層
２側が突出するようになる）してもよい。(Another Example) In the above example, the uneven portion at the boundary between the inner layer 1 and the outer layer 2 is
Although it is formed by protruding short cylindrical protrusions 1a from the inner layer I, it may also be formed by protruding hemispherical protrusions 1a from the inner layer l as shown in FIG. 3, or as shown in FIG. It may also be formed by protruding a conical projection 1a from the inner layer 1, as shown in FIG.
It may also be formed by providing a recess 1b in (in this case, the outer layer 2 side will protrude).
（発明の効果）
本発明の多層管継手においては、内層と外層との境界に
凹凸部を形成しであるため、該凹凸部Ｇこまって内外層
が相互に絡み合い、その絡み合う力によって内外層の接
着力が補われるため、該接着力が弱い場合であっても内
外層が剥離して相互に回転するということがなくなり、
従来の問題が解消される。(Effect of the invention) In the multilayer pipe joint of the present invention, since the uneven portion is formed at the boundary between the inner layer and the outer layer, the uneven portion G causes the inner and outer layers to become entangled with each other, and the force of the entanglement causes the inner and outer layers to intertwine. Since the adhesive force is supplemented, even if the adhesive force is weak, the inner and outer layers will not peel off and rotate relative to each other.
Conventional problems are resolved.
土−量日魚薗１皇亙遡−
第１図は本発明の多層管継手の一実施例を示す断面図、
第２図は第１図中の■−■線による断面図、第３図〜第
５図は本発明の多層管継手の別実施例の要部を示す断面
図である。Figure 1 is a sectional view showing an embodiment of the multilayer pipe joint of the present invention.
FIG. 2 is a cross-sectional view taken along the line ■--■ in FIG. 1, and FIGS. 3 to 5 are cross-sectional views showing main parts of another embodiment of the multilayer pipe joint of the present invention.
１・・・内層、２・・・外層、１ａ・・・突起、■ｂ・
・・凹部。1...Inner layer, 2...Outer layer, 1a...Protrusion, ■b・
・Concavity.
以上that's all
Claims (1)
た筒状の外層とを有し、 該内層がポリエーテルエーテルケトン又はポリエーテル
ニトリルを主成分とする材料にて形成され、該外層がポ
リエーテルエーテルケトン又はポリエーテルニトリル以
外の樹脂を主成分とする材料にて形成されている多層構
造の管継手であって、該内層と該外層との境界には凹凸
部が形成されている多層管継手。[Claims] 1. A material having a cylindrical inner layer in contact with a fluid and a cylindrical outer layer provided outside the inner layer, the inner layer mainly containing polyetheretherketone or polyethernitrile. It is a pipe joint with a multilayer structure in which the outer layer is made of a material whose main component is a resin other than polyetheretherketone or polyethernitrile, and the boundary between the inner layer and the outer layer is A multilayer pipe fitting with uneven parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1325682A JPH0753391B2 (en) | 1989-12-14 | 1989-12-14 | Multi-layer pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1325682A JPH0753391B2 (en) | 1989-12-14 | 1989-12-14 | Multi-layer pipe fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03184817A true JPH03184817A (en) | 1991-08-12 |
| JPH0753391B2 JPH0753391B2 (en) | 1995-06-07 |
Family
ID=18179540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1325682A Expired - Fee Related JPH0753391B2 (en) | 1989-12-14 | 1989-12-14 | Multi-layer pipe fitting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0753391B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0636828A1 (en) * | 1993-07-30 | 1995-02-01 | Sekisui Kagaku Kogyo Kabushiki Kaisha | A pipe fitting |
| US7469935B2 (en) | 2002-01-21 | 2008-12-30 | Uponor Innovation Ab | Pipe fitting comprising at least two layers of different material, the innermost layer made of plastic |
| JP2019095047A (en) * | 2017-11-17 | 2019-06-20 | 積水化学工業株式会社 | Method for connecting multilayer pipe |
-
1989
- 1989-12-14 JP JP1325682A patent/JPH0753391B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0636828A1 (en) * | 1993-07-30 | 1995-02-01 | Sekisui Kagaku Kogyo Kabushiki Kaisha | A pipe fitting |
| US7469935B2 (en) | 2002-01-21 | 2008-12-30 | Uponor Innovation Ab | Pipe fitting comprising at least two layers of different material, the innermost layer made of plastic |
| JP2019095047A (en) * | 2017-11-17 | 2019-06-20 | 積水化学工業株式会社 | Method for connecting multilayer pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0753391B2 (en) | 1995-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4711474A (en) | Pipe joint seal rings | |
| JP3546250B2 (en) | Corrugated pipe fittings | |
| EP1717506A1 (en) | Resin pipe joint unit | |
| JPH05280681A (en) | Push-in type plastic pipe fitting | |
| US6540868B1 (en) | Method for producing a connector | |
| US8733801B2 (en) | Swivel joint | |
| US3468346A (en) | Pipe fittings having an inner thermoplastic surface and an outer thermoset surface | |
| JPH03184817A (en) | Multi-layer tube joint | |
| US5431456A (en) | Pipe fitting | |
| MX2009010612A (en) | Connector for tubing, containing a plastic insert. | |
| JP5379649B2 (en) | Steel pipe fittings | |
| US3630550A (en) | Pipe coupling | |
| JP2562781B2 (en) | Resin tube connection structure | |
| KR100543135B1 (en) | structure of hose clamping | |
| US3711129A (en) | Resilient coupling | |
| JPH04145294A (en) | Transfer coupling between resin tube and metal tube | |
| JP7372803B2 (en) | loose flange | |
| TWM594299U (en) | Joint capable of diverting protection tube | |
| JPH11294651A (en) | Threaded joint for piping made of synthetic resin and the like | |
| KR20200059223A (en) | Development of fusion mechanical joint | |
| JPH03112618A (en) | Manufacture of multi-layer tube joint | |
| KR20070000046U (en) | Fitting with inner liner for screw connecting | |
| JPH02154886A (en) | Packing for connecting composite tube | |
| JP6894276B2 (en) | Piping structure construction method and piping structure | |
| JP2007051678A (en) | Pipe joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |