JPS6128558Y2 - - Google Patents
Info
- Publication number
- JPS6128558Y2 JPS6128558Y2 JP1981080140U JP8014081U JPS6128558Y2 JP S6128558 Y2 JPS6128558 Y2 JP S6128558Y2 JP 1981080140 U JP1981080140 U JP 1981080140U JP 8014081 U JP8014081 U JP 8014081U JP S6128558 Y2 JPS6128558 Y2 JP S6128558Y2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- layer
- polyethylene
- plastic
- insulating
- 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
Links
Landscapes
- Thermal Insulation (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
【考案の詳細な説明】
本考案は断熱プラスチツクパイプの改良に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in insulating plastic pipes.
温水器、屋内温水暖房等の配管用断熱パイプと
して、金属管上に発泡プラスチツク層を押出被覆
したものが使用されている。 2. Description of the Related Art Metal pipes coated with a foamed plastic layer by extrusion are used as insulating pipes for water heaters, indoor hot water heaters, etc.
しかるに、最近、上記断熱パイプの金属管に代
るものとして、ポリプテンパイプがポリプテンの
秀れた耐熱性のために注目されている。しかしな
がら、ポリプテンパイプに限らず、プラスチツク
パイプ上にプラスチツクを押出し被覆する場合
は、パイプと押出し被覆層との熱融着が不可避的
であり、プラスチツクパイプ上に発泡プラスチツ
クを押出被覆した断熱パイプにおいては、上記熱
融着のために、断熱パイプ接合時での発泡プラス
チツク層の剥離が至難であるといつた不利があ
る。 However, recently, as an alternative to the metal pipe for the heat insulating pipe, polyptene pipes have been attracting attention due to the excellent heat resistance of polyptene. However, when extruding plastic onto a plastic pipe, not only polypropylene pipes, heat fusion between the pipe and the extruded coating layer is unavoidable. However, due to the heat fusion described above, there is a disadvantage that it is extremely difficult to peel off the foamed plastic layer when joining the heat insulating pipes.
ところで、本考案者等は、意外にもポリプテン
とポリエチレンとは実事上、熱融着しないことを
知つた。本考案者等は、ポリプテンシート（融点
135℃）と高密度ポリエチレンシート（融点135
℃）とを、圧力２気圧で加圧重畳し、温度250℃
で加熱したが融着は生じなかつた。 By the way, the inventors of the present invention have surprisingly found that polyptene and polyethylene are not actually thermally fused together. The inventors have developed a polypten sheet (melting point
135℃) and high-density polyethylene sheet (melting point 135℃) and high-density polyethylene sheet (melting point 135℃)
℃) at a pressure of 2 atmospheres, and the temperature is 250℃.
was heated, but no fusion occurred.
本考案に係る断熱プラスチツクパイプは、上記
の知見に基づき案出されたものであり、ポリプテ
ンパイプ上に発泡ポリエチレンの押出層を設けた
ことを特徴とする構成である。 The insulating plastic pipe according to the present invention was devised based on the above-mentioned knowledge, and has a structure characterized by providing an extruded layer of foamed polyethylene on a polypropylene pipe.
以下、図面により本考案を説明する。 The present invention will be explained below with reference to the drawings.
図において、１はポリブテンパイプであり、ポ
リブテン−１の押出成形品である。２はポリブテ
ンパイプ１上に押出し被覆した発泡ポリエチレン
層である。 In the figure, 1 is a polybutene pipe, which is an extrusion molded product of polybutene-1. 2 is a foamed polyethylene layer extruded and coated on the polybutene pipe 1.
発泡ポリエチレン層のポリエチレンには、耐熱
性の面から高密度ポリエチレンを用いることが有
効である。また、架橋ポリエチレンを使用するこ
ともでき、特に高密度架橋ポリエチレンが有効で
ある。 From the viewpoint of heat resistance, it is effective to use high-density polyethylene as the polyethylene of the foamed polyethylene layer. Further, cross-linked polyethylene can also be used, and high-density cross-linked polyethylene is particularly effective.
本考案に係る断熱プラスチツクパイプは、上述
したように、ポリブテンパイプ上に断熱層として
の発泡プラスチツク層を設けるものにおいて、特
に発泡プラスチツク層のプラスチツクとしてポリ
エチレンを用いたものであり、前述した実験結果
からも明らかなように断熱層とパイプとの熱融着
を完全に排除できる。従つて、発泡プラスチツク
断熱層の剥離が容易で、接合作業上有利な断熱ポ
リブテンパイプを提供できる。 As mentioned above, the insulating plastic pipe according to the present invention is one in which a foamed plastic layer is provided as a heat insulating layer on a polybutene pipe, and in particular, polyethylene is used as the plastic of the foamed plastic layer. As is clear, thermal fusion between the heat insulating layer and the pipe can be completely eliminated. Therefore, it is possible to provide a heat-insulating polybutene pipe whose foamed plastic heat-insulating layer can be easily peeled off and which is advantageous for joining operations.
図面は本考案に係る断熱プラスチツクパイプを
示す断面説明図である。
図において、１……ポリブテンパイプ、２……
発泡ポリエチレンの押出層である。
The drawing is an explanatory cross-sectional view showing an insulating plastic pipe according to the present invention. In the figure, 1...polybutene pipe, 2...
It is an extruded layer of foamed polyethylene.
Claims (1)
層を設けたことを特徴とする断熱プラスチツクパ
イプ。 A heat-insulating plastic pipe characterized by having an extruded layer of foamed polyethylene on a polybutene pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981080140U JPS6128558Y2 (en) | 1981-05-29 | 1981-05-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981080140U JPS6128558Y2 (en) | 1981-05-29 | 1981-05-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57190993U JPS57190993U (en) | 1982-12-03 |
| JPS6128558Y2 true JPS6128558Y2 (en) | 1986-08-23 |
Family
ID=29875706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981080140U Expired JPS6128558Y2 (en) | 1981-05-29 | 1981-05-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6128558Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404940C (en) * | 2001-08-24 | 2008-07-23 | 古河电气工业株式会社 | Composite pipe |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AR197705A1 (en) * | 1972-03-13 | 1974-04-30 | Irmler F | APPARATUS FOR STORAGE OF PRODUCTS PACKAGED IN PACKAGES IN A VERTICAL TANK |
| JPS5825580B2 (en) * | 1975-05-12 | 1983-05-28 | 古河電気工業株式会社 | Kantai Gaimen Nihatsupou Plastics |
| JPS5210906A (en) * | 1975-07-16 | 1977-01-27 | Toshiba Corp | Electromagnetic pump |
| FR2320170A1 (en) * | 1975-08-05 | 1977-03-04 | Charbonnages Ste Chimique | PROCESS FOR THE ACCELERATED TRANSFORMATION OF THE CRYSTALLINE FORM OF PIPES INTO ISOTACTIC POLYBUTENE AND DEVICE FOR IMPLEMENTING THIS PROCESS |
| JPS5461274A (en) * | 1977-10-24 | 1979-05-17 | Mitsubishi Petrochem Co Ltd | Production of polyolefin laminate |
| JPS6014700B2 (en) * | 1978-07-17 | 1985-04-15 | 住友電気工業株式会社 | insulated plastic pipe |
| JPS5841734B2 (en) * | 1978-08-21 | 1983-09-14 | 積水化学工業株式会社 | Manufacturing method of insulation material for pipes |
| JPS5595539A (en) * | 1979-01-12 | 1980-07-19 | Inoue Mtp Co Ltd | Manufacture of heat-insulating pipe cover with outer skin |
| JPS5936423Y2 (en) * | 1979-06-05 | 1984-10-06 | 日本石油化学株式会社 | Multilayer synthetic resin pipe |
-
1981
- 1981-05-29 JP JP1981080140U patent/JPS6128558Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404940C (en) * | 2001-08-24 | 2008-07-23 | 古河电气工业株式会社 | Composite pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57190993U (en) | 1982-12-03 |
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