JPH07164554A - Thermoplastic resin made tube for thermal fusion weld and its manufacture - Google Patents

Thermoplastic resin made tube for thermal fusion weld and its manufacture

Info

Publication number
JPH07164554A
JPH07164554A JP5313422A JP31342293A JPH07164554A JP H07164554 A JPH07164554 A JP H07164554A JP 5313422 A JP5313422 A JP 5313422A JP 31342293 A JP31342293 A JP 31342293A JP H07164554 A JPH07164554 A JP H07164554A
Authority
JP
Japan
Prior art keywords
thermoplastic resin
thin film
tube
resin made
peripheral surface
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
Application number
JP5313422A
Other languages
Japanese (ja)
Inventor
Junichi Yuasa
淳一 湯浅
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical 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
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP5313422A priority Critical patent/JPH07164554A/en
Publication of JPH07164554A publication Critical patent/JPH07164554A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • B29C66/0224—Mechanical pre-treatments, e.g. reshaping with removal of material
    • B29C66/02241—Cutting, e.g. by using waterjets, or sawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products

Abstract

PURPOSE:To make a surface of a thermoplastic resin made tube a new surface which is free from sticking of dust and oxidation by a method wherein an easily separable thin film is provided in close adhesion onto an outer peripheral surface of the thermoplastic resin made tube of a specific outside diameter. CONSTITUTION:When a thermoplastic resin made tube 2 is inserted into a tube like thin film 3a, and heated at a temperature higher than temperature at which it is expanded by pouring hot water thereon, the tube like thin film 3a is contracted, and a thermoplastic resin made tube for thermal fusion weld wherein the thin film 3a is stuck fast onto an outer peripheral surface of the thermoplastic resin made tube 2, is obtained. After cutting the thin film 3a on the outer peripheral surface at an end part of the thermoplastic resin made tube for fusion weld 1 by applying a knife to a boundary between a part to be inserted into a faucet 41 of a tube joint 4 and a part not to be inserted, the thin film 3a of the part to be inserted is peeled off. Then, a new surface of the thermoplastic resin made tube 2 is appeared at the end part. When the end part wherein the new surface is appeared is inserted into the faucet 41 of the tube joint, and electricity is conducted to an electric heating element 5 buried in an inner surface of the faucet 41, the faucet 4 is fusion welded to the thermoplastic resin made tube 2, and they are strongly bonded to each other.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は熱融着用熱可塑性樹脂製
管およびこの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermoplastic resin tube for heat fusion and a method for producing the same.

【０００２】[0002]

【従来の技術】加熱して熱可塑性樹脂製管の表面を溶融
して接着させる接続方法としては種々あるが、その中の
最も代表的な方法に電気融着方法がある。この電気融着
方法は、例えば、特開昭５８−１３１０２５号公報、特
開昭６３−２５２７２２号公報に記載されているよう
に、熱可塑性樹脂製管または熱可塑性樹脂製管継手の受
け口の内面にニクロム線等の電気発熱素子を埋設してい
て、この受け口の中に熱可塑性樹脂製管の挿し口を挿入
し、電気発熱素子に通電して、受け口の内周面を溶融し
て熱可塑性樹脂製管または管継手と熱可塑性樹脂製管と
を接続する方法がある。2. Description of the Related Art There are various connecting methods for melting and adhering the surfaces of thermoplastic resin tubes by heating, and the most typical method among them is the electric fusion method. This electric fusing method is disclosed, for example, in JP-A-58-131025 and JP-A-63-252722, in which the inner surface of a receiving port of a thermoplastic resin pipe or a thermoplastic resin pipe joint is used. An electric heating element such as a nichrome wire is embedded in this, and the insertion port of the thermoplastic resin tube is inserted into this receiving port, the electric heating element is energized, the inner peripheral surface of the receiving port is melted, and the thermoplastic There is a method of connecting a resin pipe or a pipe joint and a thermoplastic resin pipe.

【０００３】しかし、このように熱可塑性樹脂製管を熱
融着させるときに、熱可塑性樹脂製管の表面にゴミが付
着していたり、あるいは、熱可塑性樹脂製管の表面が酸
化されていたりすると、完全に接着し難い。従って、こ
のようにして接続した管路に水やガスを通すと、水やガ
スが漏れ出すという問題がある。かかる問題を解決する
方法としては、特開平−２−２０５４０４号公報に記載
あるように、接着する熱可塑性樹脂製管の表面を切削し
て新しい表面にする方法が知られている。However, when the thermoplastic resin pipe is heat-sealed as described above, dust is attached to the surface of the thermoplastic resin pipe, or the surface of the thermoplastic resin pipe is oxidized. Then, it is difficult to bond completely. Therefore, when water or gas is passed through the pipes connected in this way, there is a problem that water or gas leaks. As a method for solving such a problem, as described in JP-A-2-205404, there is known a method of cutting a surface of a thermoplastic resin tube to be bonded to a new surface.

【０００４】[0004]

【発明が解決しようとする課題】しかし、このように熱
可塑性樹脂製管の表面を切削することは極めて煩瑣で時
間がかかるという問題がある。更に、切削し過ぎると、
受け口の中に挿し口が密着せず、従って、接着し難いと
いう問題がある。そこで、本発明の目的は、熱可塑性樹
脂製管の表面をゴミが付着してなく、且つ、酸化してな
い新しい表面にすることができ、しかも、切削し過ぎる
ことがない熱融着用熱可塑性樹脂製管およびその製造方
法を提供することである。However, there is a problem that cutting the surface of the thermoplastic resin tube in this way is extremely troublesome and time consuming. Furthermore, if you cut too much,
There is a problem that the insertion opening does not adhere to the receiving opening, and thus it is difficult to adhere. Therefore, an object of the present invention is to make the surface of the thermoplastic resin pipe a new surface free from dust and not oxidized, and yet to prevent overcutting. A resin pipe and a method for manufacturing the same.

【０００５】[0005]

【課題を解決するための手段】本発明は上記目的を達成
するためになされたものであって、請求項１の発明は、
所定外径の熱可塑性樹脂製管の外周面に容易に剥がすこ
とができる薄膜が密着して設けられているものである。
又、請求項２の発明は、所定外径の熱可塑性樹脂製管の
少なくとも熱融着させる外周部分に、加熱すると収縮す
る性質を有するチューブ状薄膜を被せ、加熱して、この
チューブ状薄膜を収縮させて、熱可塑性樹脂製管の外周
面に薄膜を密着させるものである。The present invention has been made to achieve the above object, and the invention of claim 1 is as follows.
A thin film that can be easily peeled off is provided in close contact with the outer peripheral surface of a thermoplastic resin tube having a predetermined outer diameter.
Further, in the invention of claim 2, at least the outer peripheral portion of the thermoplastic resin pipe having a predetermined outer diameter to be heat-sealed is covered with a tubular thin film having a property of shrinking when heated, and the tubular thin film is heated. The thin film is contracted to bring the thin film into close contact with the outer peripheral surface of the thermoplastic resin tube.

【０００６】請求項１の発明においては所定外径の熱可
塑性樹脂製管の外周面に容易に剥がすことができる薄膜
が密着して設けられているが、このように薄膜を設ける
方法は種々ある。例えば、長尺の薄膜を螺旋形に巻いて
いてもよいし、熱可塑性樹脂製管を製造する際に、外周
面にこの熱可塑性樹脂と溶着し難い材料からなる樹脂を
押し出して被覆させてもよい。しかし、請求項２のよう
に、加熱すると収縮する性質を有するチューブ状薄膜を
被せ、加熱してこのチューブ状薄膜を収縮させて、熱可
塑性樹脂性管の外周面に薄膜を密着させる方法が好まし
い。According to the first aspect of the invention, the thin film which can be easily peeled off is provided in close contact with the outer peripheral surface of the thermoplastic resin tube having the predetermined outer diameter, but there are various methods for providing such a thin film. . For example, a long thin film may be wound in a spiral shape, or when a thermoplastic resin tube is manufactured, the outer peripheral surface may be extruded and coated with a resin made of a material that is difficult to weld with this thermoplastic resin. Good. However, it is preferable that a tubular thin film having a property of shrinking when heated is covered, and the tubular thin film is shrunk by heating so that the thin film adheres to the outer peripheral surface of the thermoplastic resin tube. .

【０００７】この加熱すると収縮する性質を有するチュ
ーブ状薄膜とは、チューブ状に熱可塑性樹脂を押し出
し、未だ、軟化状態の間に膨張させて製造したものであ
る。すると、この膨張させた温度以上に加熱すると、元
の状態に収縮する性質を有するチューブ状薄膜となる。The tubular thin film having the property of shrinking when heated is produced by extruding a thermoplastic resin into a tubular shape and expanding it while it is still in a softened state. Then, when heated above the expanded temperature, a tubular thin film having the property of contracting to its original state is formed.

【０００８】[0008]

【作用】本発明熱融着用熱可塑性樹脂製管は外周面に容
易に剥がすことができる薄膜が密着され設けられている
から、熱融着するときにこの薄膜を剥がす。すると、所
定外径の熱可塑性樹脂製管の外周面の新しい面が顕れ
る。この熱可塑性樹脂製管の先端を受け口に挿入して、
受け口内周面に埋設されている電気発熱素子に通電す
る。すると、受け口内周面が溶融して熱可塑性樹脂製管
の外周面に融着して接続する。The thermoplastic resin pipe for heat fusion of the present invention is provided with a thin film which can be easily peeled off on the outer peripheral surface thereof. Therefore, the thin film is peeled off when heat fusion is performed. Then, a new surface of the outer peripheral surface of the thermoplastic resin pipe having a predetermined outer diameter appears. Insert the tip of this thermoplastic resin tube into the socket,
The electric heating element embedded in the inner peripheral surface of the receiving port is energized. Then, the inner peripheral surface of the receiving port is melted and fused and connected to the outer peripheral surface of the thermoplastic resin pipe.

【０００９】この際、熱可塑性樹脂製管の外周面は新し
い外周面が顕れているから、ゴミや酸化層によって接着
不良となることがない。又、この熱可塑性樹脂製管は所
定外径の熱可塑性樹脂性管であるから、薄膜を剥がす
と、この剥がした部分は所定外径となる。従って、受け
口の中に挿入すると受け口の内周面と熱可塑性樹脂性管
の外周面とは密着し、接着不良になるということがな
い。At this time, since the outer peripheral surface of the thermoplastic resin tube is a new outer peripheral surface, no adhesion failure is caused by dust or an oxide layer. Further, since this thermoplastic resin pipe is a thermoplastic resin pipe having a predetermined outer diameter, when the thin film is peeled off, the peeled portion has a predetermined outer diameter. Therefore, when it is inserted into the receiving port, the inner peripheral surface of the receiving port and the outer peripheral surface of the thermoplastic resin tube are in close contact with each other, and there is no possibility of poor adhesion.

【００１０】本発明において、熱可塑性樹脂管の外周面
に加熱すると収縮する性質を有する薄膜を被せ、加熱し
てこの薄膜を収縮させて熱可塑性樹脂製管の外周面に薄
膜を密着させると、剥がすことができ密着した薄膜が設
けられた熱可塑性樹脂性管が容易に製造できる。In the present invention, when the outer peripheral surface of the thermoplastic resin tube is covered with a thin film having a property of shrinking when heated, and the thin film is contracted by heating to bring the thin film into close contact with the outer peripheral surface of the thermoplastic resin tube, A thermoplastic resin tube provided with a thin film that can be peeled off and adhered can be easily manufactured.

【００１１】[0011]

【実施例】次に、本発明の実施例を説明する。図１〜図
３は本発明の一実施例を示すもので、図１は熱融着用熱
可塑性樹脂製管の断面図、図２は図１に示す熱融着用熱
可塑性樹脂製管の製造方法を示す説明図、図３は図１に
示す熱可塑性樹脂製管と管継手の受け口とを接続してい
る状態を示すもので、（イ）は管端部の薄膜を剥がした
状態を示す説明図、（ロ）は熱可塑性樹脂製管と管継手
とを接続した状態を示す説明図である。EXAMPLES Next, examples of the present invention will be described. 1 to 3 show one embodiment of the present invention, FIG. 1 is a cross-sectional view of a thermoplastic resin pipe for heat fusion, and FIG. 2 is a method for manufacturing a thermoplastic resin pipe for heat fusion shown in FIG. FIG. 3 shows a state in which the thermoplastic resin pipe shown in FIG. 1 is connected to the receiving port of the pipe joint, and (a) shows a state in which the thin film at the pipe end is peeled off. Drawing (b) is an explanatory view showing the state where a pipe made of a thermoplastic resin and a pipe joint were connected.

【００１２】図１〜図３において、１は熱融着用熱可塑
性樹脂製管であり、この熱融着用熱可塑性樹脂製管１は
ポリエチレン樹脂からなる熱可塑性樹脂製管２と、この
外周面に密着した塩化ビニル樹脂からなる薄膜３とから
なる。３ａは塩化ビニル樹脂製の加熱すると収縮する性
質を有するチューブ状の薄膜であり、この薄膜３ａは軟
化状態にある熱融着用熱可塑性樹脂製管の外径より小さ
いチューブ状薄膜を、熱融着用熱可塑性樹脂管の外径よ
り大きく膨張させて製造したものである。1 to 3, reference numeral 1 denotes a thermoplastic resin pipe for heat fusion, and the thermoplastic resin pipe 1 for heat fusion is a thermoplastic resin pipe 2 made of polyethylene resin and a peripheral surface thereof. And a thin film 3 made of vinyl chloride resin in close contact with each other. 3a is a tube-shaped thin film made of vinyl chloride resin that has the property of shrinking when heated, and this thin film 3a is a tube-shaped thin film that is smaller than the outer diameter of the thermoplastic resin tube in the softened state. It is manufactured by expanding the thermoplastic resin tube larger than the outer diameter thereof.

【００１３】４はポリエチレン樹脂からなる管継手であ
り、この管継手４は両端が拡大していて受け口４１、４
１が形成されている。この受け口４１の内周面にはニク
ロム線からなる電気発熱素子５が埋設されている。この
受け口４１の内径は熱可塑性樹脂製管２の外径より若干
大きく、受け口４１内に熱可塑性樹脂製管２が挿入され
ると密着するようになっている。Reference numeral 4 denotes a pipe joint made of polyethylene resin. The pipe joint 4 has enlarged both ends and has receiving ports 41, 4
1 is formed. An electric heating element 5 made of a nichrome wire is embedded in the inner peripheral surface of the receiving port 41. The inner diameter of the receiving port 41 is slightly larger than the outer diameter of the thermoplastic resin pipe 2, and when the thermoplastic resin pipe 2 is inserted into the receiving port 41, the receiving port 41 comes into close contact with the receiving port 41.

【００１４】次に、この熱融着用熱可塑性樹脂製管の製
造方法および熱可塑性樹脂製管と管継手との接続方法に
ついて説明する。図２に示すように、チューブ状の薄膜
３ａの中に熱可塑性樹脂製管２を挿入し、熱湯をかけて
膨張させた温度より高い温度に加熱する。すると、この
チューブ状の薄膜３ａが収縮し、図１に示すように、薄
膜３が熱可塑性樹脂管２の外周面に密着した熱融着用熱
可塑性樹脂製管１となる。この熱融着用熱可塑性樹脂製
管１と管継手４とを接続するには、図３に示すように、
管継手４の受け口４１の中に挿入する部分と挿入しない
部分との境界にナイフを当てて、熱融着用熱可塑性樹脂
製管１の端部外周面の薄膜３を切断した後、挿入する部
分の薄膜３を剥がす。すると、この端部に熱可塑性樹脂
製管２からなる新しい面が顕れる。Next, a method of manufacturing the thermoplastic resin pipe for heat fusion and a method of connecting the thermoplastic resin pipe and the pipe joint will be described. As shown in FIG. 2, the thermoplastic resin tube 2 is inserted into the tubular thin film 3a, and heated to a temperature higher than the temperature at which it is expanded by applying hot water. Then, the tubular thin film 3a contracts, and as shown in FIG. 1, the thin film 3 becomes the thermoplastic resin pipe 1 for heat fusion, which is in close contact with the outer peripheral surface of the thermoplastic resin pipe 2. In order to connect the thermoplastic resin pipe 1 for heat fusion and the pipe joint 4, as shown in FIG.
A portion to be inserted after cutting the thin film 3 on the outer peripheral surface of the end portion of the thermoplastic resin pipe 1 for heat fusion by applying a knife to a boundary between a portion to be inserted into the receiving port 41 of the pipe joint 4 and a portion not to be inserted. The thin film 3 is peeled off. Then, a new surface composed of the thermoplastic resin tube 2 appears at this end.

【００１５】次に、この新しい面が顕れた端部を管継手
４の受け口４１に挿入する。すると、管継手４の受け口
４１の中に熱可塑性樹脂性管１の先端部が密着した状態
に挿入される。次に、受け口４１内面に埋設されている
電気発熱素子５に通電する。すると、この受け口４１の
内面は電気抵抗発熱素子５の熱により溶融し、受け口４
１と熱可塑性樹脂製管２とは融着し、冷却すると、一体
になって、強固に接続される。このように、薄膜３を剥
がすと新しい面が顕れるから、この面にはゴミが付着し
たり、酸化層がないから支障なく融着できる。Next, the end of this new surface is inserted into the receiving port 41 of the pipe joint 4. Then, the tip end portion of the thermoplastic resin tube 1 is inserted into the receiving port 41 of the pipe joint 4 in a state of being in close contact with it. Next, the electric heating element 5 embedded in the inner surface of the receiving port 41 is energized. Then, the inner surface of the receiving port 41 is melted by the heat of the electric resistance heating element 5, and the receiving port 4
When 1 and the thermoplastic resin pipe 2 are fused and cooled, they are integrated and firmly connected. In this way, when the thin film 3 is peeled off, a new surface appears, so that dust is attached to this surface, and since there is no oxide layer, it can be fused without trouble.

【００１６】[0016]

【発明の効果】本発明熱融着用熱可塑性樹脂製管は外周
面に容易に剥がすことができる薄膜が密着しているか
ら、この薄膜を剥がすことにより簡単に新しい面が顕れ
る。従って、この顕れた面はゴミや酸化層が付着してな
く、支障なく融着させることができる。又、この薄膜を
剥がすと、所定外径の熱可塑性樹脂製管が顕れるから、
これを受け口の中に挿入すると、受け口に密着し、支障
なく融着させることができる。本発明の製造方法では、
加熱すると収縮する性質を有する薄膜を被せ、加熱し
て、この薄膜を収縮させることによって簡単に熱融着用
熱可塑性樹脂製管を製造できるので便利である。EFFECTS OF THE INVENTION The thermoplastic resin pipe for heat fusion of the present invention has a thin film which can be easily peeled off adhered to the outer peripheral surface, so that a new surface can be easily revealed by peeling this thin film. Therefore, no dust or oxide layer is attached to the exposed surface, and the surface can be fused without trouble. Also, when this thin film is peeled off, a thermoplastic resin tube with a predetermined outer diameter appears,
When this is inserted into the receiving opening, it can be adhered to the receiving opening and fused without any trouble. In the manufacturing method of the present invention,
It is convenient because a thin film of a thermoplastic resin for heat fusion can be easily produced by covering a thin film having a property of shrinking when heated, and heating and shrinking the thin film.

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

【図１】本発明の一実施例を示すもので、熱融着用熱可
塑性樹脂製管の断面図である。FIG. 1 shows an embodiment of the present invention and is a sectional view of a thermoplastic resin tube for heat fusion.

【図２】図１に示す熱融着用熱可塑性樹脂製管の製造方
法を示す説明図である。FIG. 2 is an explanatory view showing a method for manufacturing the thermoplastic resin pipe for heat fusion shown in FIG.

【図３】図１に示す熱可塑性樹脂製管と管継手の受け口
とを接続している状態を示すもので、（イ）は管端部の
薄膜を剥がした状態を示す説明図、（ロ）は熱可塑性樹
脂製管と管継手とを接続した状態を示す説明図である。FIG. 3 shows a state in which the thermoplastic resin pipe shown in FIG. 1 is connected to a receiving port of a pipe joint, and (a) is an explanatory view showing a state in which the thin film at the pipe end is peeled off, 4] is an explanatory view showing a state in which a thermoplastic resin pipe and a pipe joint are connected.

【符号の説明】[Explanation of symbols]

１ 熱融着用熱可塑性樹脂製管 ２ 熱可塑性樹脂製管 ３ 薄膜 ３ａ 加熱すると収縮する性質を有する
チューブ状薄膜 ４ 管継手 ４１ 受け口 ５ 電気発熱素子DESCRIPTION OF SYMBOLS 1 Thermoplastic resin pipe for heat fusion 2 Thermoplastic resin pipe 3 Thin film 3a Tubular thin film having the property of shrinking when heated 4 Pipe joint 41 Receptacle 5 Electric heating element

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 所定外径の熱可塑性樹脂製管の外周面に
容易に剥がすことができる薄膜が密着して設けられてい
ることを特徴とする熱融着用熱可塑性樹脂管。1. A thermoplastic resin pipe for heat fusion, wherein a thin film that can be easily peeled off is provided in close contact with the outer peripheral surface of a thermoplastic resin pipe having a predetermined outer diameter. 【請求項２】 所定外径の熱可塑性樹脂製管の少なくと
も熱融着させる外周部分に、加熱すると収縮する性質を
有するチューブ状薄膜を被せ、加熱して、このチューブ
状薄膜を収縮させて、熱可塑性樹脂製管の外周面に薄膜
を密着させることを特徴とする熱融着用熱可塑性樹脂製
管の製造方法。2. A tubular thin film having a property of shrinking when heated is covered on at least an outer peripheral portion of a thermoplastic resin pipe having a predetermined outer diameter to be heat-sealed, and heated to shrink the tubular thin film, A method for producing a thermoplastic resin pipe for heat fusion, which comprises bringing a thin film into close contact with the outer peripheral surface of the thermoplastic resin pipe.
JP5313422A 1993-12-14 1993-12-14 Thermoplastic resin made tube for thermal fusion weld and its manufacture Pending JPH07164554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5313422A JPH07164554A (en) 1993-12-14 1993-12-14 Thermoplastic resin made tube for thermal fusion weld and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5313422A JPH07164554A (en) 1993-12-14 1993-12-14 Thermoplastic resin made tube for thermal fusion weld and its manufacture

Publications (1)

Publication Number Publication Date
JPH07164554A true JPH07164554A (en) 1995-06-27

Family

ID=18041111

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5313422A Pending JPH07164554A (en) 1993-12-14 1993-12-14 Thermoplastic resin made tube for thermal fusion weld and its manufacture

Country Status (1)

Country Link
JP (1) JPH07164554A (en)

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