JPS586613B2 - Method for manufacturing double shrink tube - Google Patents
Method for manufacturing double shrink tubeInfo
- Publication number
- JPS586613B2 JPS586613B2 JP405678A JP405678A JPS586613B2 JP S586613 B2 JPS586613 B2 JP S586613B2 JP 405678 A JP405678 A JP 405678A JP 405678 A JP405678 A JP 405678A JP S586613 B2 JPS586613 B2 JP S586613B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- inner layer
- shrink tube
- layer agent
- double shrink
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 title claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 229920006122 polyamide resin Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- QLZJUIZVJLSNDD-UHFFFAOYSA-N 2-(2-methylidenebutanoyloxy)ethyl 2-methylidenebutanoate Chemical compound CCC(=C)C(=O)OCCOC(=O)C(=C)CC QLZJUIZVJLSNDD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Description
【発明の詳細な説明】
本発明はケーブルのジョイントの保護カバー用に適した
２重収縮チューブの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing double shrink tubes suitable for protective coverings of cable joints.
熱収縮チューブは、チューブが加熱された状態に於て、
ある種の拡大手段で、所定の大きさまで膨張させ、これ
を冷却固定して製造するものである。Heat-shrinkable tubes, when heated,
It is manufactured by expanding it to a predetermined size using some kind of expansion means, and then cooling and fixing it.
こうした熱収縮チューブをケーブルのジョイントの保護
カバー用として使用するときには、防水をより完全なも
のとするために、あらかじめチューブの内側にケーブル
シースとチューブとの接着剤のやくめをはたす内層をも
うけた２重収縮チューブとする必要がある。When using such heat-shrinkable tubes as protective covers for cable joints, in order to make them more completely waterproof, it is necessary to prepare an inner layer on the inside of the tubes to prevent the adhesive between the cable sheath and the tubes. It needs to be double shrink tubing.
しかも、この内層も、ケーブルの使用温度（６０℃〜８
０℃）程度で流れ出すといったものでは具合が悪いこと
はいうまでもない。Moreover, this inner layer also
It goes without saying that something that flows out at temperatures around 0°C would be bad.
こうした高温度まで溶融しない材料を収縮チューブの内
層とした２重収縮チューブをつくるのは非常に難かしい
。It is extremely difficult to make a double shrink tube with the inner layer of the shrink tube made of a material that does not melt at such high temperatures.
なぜならチューブと内層とを一体化するために加熱する
とチューブが収縮するからである。This is because the tube shrinks when heated to integrate the tube and the inner layer.
こうしたチューブの収縮を防止しながら内層剤との一体
化をする方法について種々検討した結果、チューブの収
縮力にうちかつだけの遠心力が生ずるだけの速さでチュ
ーブを回転させながら内層剤及びチューブを加熱するこ
とにより、チューブを収縮させずに両者を一体化するこ
とが出来ることを見出し、本発明を完成した。As a result of various studies on how to integrate the tube with the inner layer agent while preventing the tube from shrinking, we found that while rotating the tube at a speed sufficient to generate a centrifugal force that overcomes the shrinkage force of the tube, the inner layer agent and tube It was discovered that by heating the tube, the two can be integrated without shrinking the tube, and the present invention was completed.
実施例
内径５０ｍｍφ、厚さ３ｍｍφのポリエチレンチューブ
に２０メガラツドの電子線を照射して架橋した後、１５
０℃の加熱雰囲気中で一辺の長さが約７５ｍｍの６角形
になるまで機械的に拡大した。Example After crosslinking a polyethylene tube with an inner diameter of 50 mmφ and a thickness of 3 mmφ by irradiating it with a 20 megarad electron beam,
It was mechanically expanded in a heating atmosphere at 0° C. until it became a hexagon with a side length of about 75 mm.
このチューブを内径１５５ｍｍφの金属パイプ中に入れ
、更にチューブの内側にバーサミド１２５＊のべレツト
を入れ、４０００ｒｐｍで回転させた。This tube was placed in a metal pipe with an inner diameter of 155 mm, and a pellet of Versamide 125* was placed inside the tube, and the tube was rotated at 4000 rpm.
（＊ポリアミド系樹脂商品名）
こうして回転させながら、赤外線ヒーターで内側から加
熱し、チューブ及び内層剤を金属パイプの内側におしつ
けた。(*Polyamide resin product name) While rotating in this manner, the tube and inner layer agent were applied to the inside of the metal pipe by heating from the inside with an infrared heater.
こうしてチューブと内層剤とを一体化させた後、赤外線
ヒーターを切り、回転を続けながら冷却した後回転をと
めた。After the tube and the inner layer agent were integrated in this manner, the infrared heater was turned off, and the tube was cooled while continuing to rotate, and then the rotation was stopped.
こうして、ケーブルとの接着用の内層剤つきの２重収縮
チューブを得ることが出来たが、内層剤をペレット状で
供給したため、チューブの長さ方向に内層剤の厚みの不
均一が生じた。In this way, it was possible to obtain a double shrink tube with an inner layer agent for adhesion to the cable, but since the inner layer agent was supplied in the form of pellets, the thickness of the inner layer agent was uneven in the length direction of the tube.
（円周方向にはほぼ均一の厚みのものが得られた。(A product with approximately uniform thickness in the circumferential direction was obtained.
）そこで、あらかじめバーサミド１２５を厚さ２ｍｍ幅
７０ｍｍのテープ状に成型しておき、これをチユーブの
中に入れ、先きに述べた方法と同様にして、チューブと
一体化させた。) Therefore, Versamide 125 was previously formed into a tape shape with a thickness of 2 mm and a width of 70 mm, which was placed into a tube and integrated with the tube in the same manner as described above.
内層剤をあらかじめテープ状にしておく方法であれば円
周方向はもちろん、長さ方向にも内層剤の厚みが均一な
２重収縮チューブが得られた。By forming the inner layer agent into a tape shape in advance, a double shrink tube with a uniform inner layer thickness not only in the circumferential direction but also in the longitudinal direction could be obtained.
ここではチューブとしてポリエチレンについて述べたが
。I mentioned polyethylene as a tube here.
チューブの材料としてはＰｖＣでもゴムでも収縮チュー
ブが製造出来るものであれば、なんでもこの方法が適用
出来る。This method can be applied to any tube material that can be used to produce a shrinkable tube, such as PvC or rubber.
又、内層剤としてもここで述べたポリアミド系樹脂だけ
でなく、゜エチレンエチルアクリレート、エチレン酢酸
ビニルなどエチレン系共重合物なども適用出来ることは
いうまでもない。It goes without saying that not only the polyamide resins mentioned herein but also ethylene copolymers such as ethylene ethyl acrylate and ethylene vinyl acetate can be used as the inner layer agent.
Claims (1)
パイプの中に収縮チューブを入れ、更に収縮チューブの
中に内層剤用の材料を入れ、収縮チューブの収縮力にう
ちかつだけの遠心力を生ずるような回転速度でこれらを
回転させ、回転させながらチューブと内層剤とを加熱、
一体化し、更に回転を続けながら冷却した後とりだすこ
とを特徴とする２重収縮チューブの製造方法。 ２ 内層剤をあらかじめテープ状に成型して収縮チュー
ブの中に入れることを特徴とする特許請求の範囲第１項
の２重収縮チューブの製造方法。[Claims] 1. A shrinkable tube is placed in a pipe having an inner diameter slightly larger than the outer diameter of the shrinkable tube, and a material for an inner layer agent is placed inside the shrinkable tube, and the shrinkage force of the shrinkable tube is absorbed. Rotate these at a rotation speed that generates a centrifugal force, and heat the tube and inner layer agent while rotating.
A method for manufacturing a double shrink tube, which is characterized in that the tube is integrated, cooled while continuing to rotate, and then taken out. 2. The method for manufacturing a double shrink tube according to claim 1, characterized in that the inner layer agent is previously formed into a tape shape and placed in the shrink tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP405678A JPS586613B2 (en) | 1978-01-17 | 1978-01-17 | Method for manufacturing double shrink tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP405678A JPS586613B2 (en) | 1978-01-17 | 1978-01-17 | Method for manufacturing double shrink tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5496588A JPS5496588A (en) | 1979-07-31 |
| JPS586613B2 true JPS586613B2 (en) | 1983-02-05 |
Family
ID=11574210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP405678A Expired JPS586613B2 (en) | 1978-01-17 | 1978-01-17 | Method for manufacturing double shrink tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS586613B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100441424B1 (en) * | 2001-12-04 | 2004-07-23 | 연규석 | Three-layer centrifugal pipe using polymer concrete and it's manufacturing method |
-
1978
- 1978-01-17 JP JP405678A patent/JPS586613B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5496588A (en) | 1979-07-31 |
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