JPS6153941B2 - - Google Patents

Info

Publication number
JPS6153941B2
JPS6153941B2 JP13490081A JP13490081A JPS6153941B2 JP S6153941 B2 JPS6153941 B2 JP S6153941B2 JP 13490081 A JP13490081 A JP 13490081A JP 13490081 A JP13490081 A JP 13490081A JP S6153941 B2 JPS6153941 B2 JP S6153941B2
Authority
JP
Japan
Prior art keywords
water
gel fraction
pipes
polyolefin
pipe
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
Application number
JP13490081A
Other languages
English (en)
Other versions
JPS5859014A (ja
Inventor
Kyoshi Nakakawara
Masaki Matsui
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.)
Dainichi Nippon Cables Ltd
Original Assignee
Dainichi Nippon Cables 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 Dainichi Nippon Cables Ltd filed Critical Dainichi Nippon Cables Ltd
Priority to JP13490081A priority Critical patent/JPS5859014A/ja
Publication of JPS5859014A publication Critical patent/JPS5859014A/ja
Publication of JPS6153941B2 publication Critical patent/JPS6153941B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/041—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using liquids
    • 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
    • B29C65/022—Particular heating or welding methods not otherwise provided for
    • B29C65/026—Particular heating or welding methods not otherwise provided for making use of hot liquids, i.e. the liquid is in direct contact with the material to be joined
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4895—Solvent bonding, i.e. the surfaces of the parts to be joined being treated with solvents, swelling or softening agents, without adhesives
    • 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
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • 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
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7375—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured
    • B29C66/73753—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being partially cured, i.e. partially cross-linked, partially vulcanized
    • B29C66/73754—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being partially cured, i.e. partially cross-linked, partially vulcanized the to-be-joined areas of both parts to be joined being partially cured
    • 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
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Description

【発明の詳細な説明】 架橋ポリオレフインからなるパイプは、架橋さ
れていないポリオレフインからなるパイプと比較
して、耐熱性、耐環境応力亀裂性などの点におい
て優れていることから、ガス管、水道管、給湯管
用として有望視されている。
ところで、それらの用途に使用するためにはパ
イプ同士の接続が実際上必要となるが、架橋ポリ
エチレンは熱溶融しない、又はその程度が小さい
ので架橋ポリオレフインパイプは、架橋されてい
ないポリオレフインパイプのように熱融着によつ
ては強固に接続することができない。
ところで、本発明者らの研究によれば、水架橋
性ポリエチレンがゲル分率にして５％以上60％未
満の低架橋の状態にある間に融着により接続し、
次いで水によりパイプを構成するポリオレフイン
をゲル分率にして少くとも60％に架橋させること
により、強固に接続された架橋ポリエチレンパイ
プが得られる。
本発明において、パイプを構成する水架橋性ポ
リオレフインとしては、公知のもの、たとえば(a)
ポリエチレン、ポリプロピレン、エチレン−酢酸
ビニル共重合体、(b)一般式RR′SiY2（Ｒは一価の
オレフイン性不飽和を含む炭化水素基又はハイド
ロカーボンオキシ基、Ｙは加水分解し得る有機
基、R′は基Ｒ又は基Ｙ）で表わされる化合物、
(c)パーオキサイドなどの遊離ラジカル発生剤、及
び(d)シラノール縮合触媒とからなるものが用いら
れる。パイプ同士の融着はポリオレフインのゲル
分率が５％以上60％未満、好ましくは５〜55％で
ある低架橋の状態にある間に行われるが、60％よ
り大であると充分に融着せず、また、融着後の追
架橋によつてもパイプの強固な接続が達成されな
い。一方、本発明においては融着時におけるポリ
オレフインのゲル分率は可及的低い方が好まし
く、而してゲル分率５％未満のものであつても理
論的には良好に本発明が達成されると予想される
が、現実の問題として工場生産された水架橋性ポ
リオレフインは、水架橋工程に入る前に、大気中
の水分などによつてすでに架橋が進んでおり５％
前後のゲル分率に達している。
本発明において接続されるパイプ同士は、融着
によつて接続されるが、この場合の「融着」は、
加熱による融着のみならず、適当な有機溶媒、軟
化剤、膨潤剤などによりパイプ被接続部表面及び
その近傍のポリオレフイン分子のモビリテイを高
めて接続界面でのポリオレフイン分子の相互拡散
にもとずき接続させ得る全ての接着の態様を意味
するものである。熱融着による場合は架橋されて
いないポリオレフインパイプにつき行われている
場合と同様に加熱により溶融状態にもたらされた
パイプ端面同士を圧接すればよい。また、パイプ
を構成するベースポリオレフインと同種の、但し
オリゴヤー、ワツクス状などの低分子異物を溶媒
として用いて必要に応じて加熱を行い熱溶着させ
て接続させてもよい。
上記の接続において、接続されるパイプは全層
にわたりゲル分率が５〜60％である必要は必ずし
もなく、接続されるべきパイプの外側、内側、又
はその中間において全層厚の1/2以上の厚み部分
において上記ゲル分率であればよい。
上記の接続作業のあと、パイプ本体及び接続部
のポリオレフインは水により架橋されてゲル分率
にして少くとも60％好ましくは少くとも70％の架
橋度に架橋される。たとえばパイプに水、好まし
くは50〜100℃の温水、熱水を通すことにより達
成させ得る。
なお、本発明において融着により接続された状
態で、接続部はすでに比較的高強度を有している
ので、送水、給湯を高水圧で行う場合は別とし
て、５Kg/cm2以下程度の低水圧で行う場合は、送
水、給湯などに実用しつつ水架橋を行わせてもよ
い。
以下、実施例、比較例により本発明を一層詳細
に説明する。
〔実施例１〜３、比較例１〕 密度0.955ｇ/cm3、MI0.58ｇ／10分のポリエチレ
ン100部（重量部、以下同様）、ビニルトリメトキ
シシラン2.0部、ジクミルパーオキシド0.2部、ジ
ブチル−錫−ジラウレート0.05部とからなる水架
橋し得るポリエチレン組成物を用いて外径91mm、
肉厚10mmのパイプを製造し、該パイプから切取つ
た長さ30cmのパイプ片を各種の水架橋条件にて架
橋させてポリエチレンのゲル分率が５％（架橋処
理なし、実施例１）、30％（実施例２）、55％（実
施例３）、65％（比較例１）とした。各実施例、
比較例で用いる２本のパイプ片の接続すべき端面
を200℃に加熱して溶融状態にもたらして充分に
圧接して接続し、このあと90℃の熱水中に投入し
て２時間放置し水架橋させた。この水架橋後のパ
イプ構成ポリエチレンのゲル分率、接続部の強度
は、それぞれ、85％、52Kg/cm2（実施例１）、85
％、50Kg/cm2（実施例２）、86％、45Kg/cm2（実施
例３）、84％、15Kg/cm2（比較例１）であつた。
ポリエチレンのゲル分率はJIS Ｃ 3005の26項
に準ずる方法で測定し、接続部の強度は次の方法
で測定した。
接続部の強度テスト………パイプ内に満した水
の圧力を20Kg／cm2／分の速度で漸次上昇させパイ
プを破裂させる。上記実施例、比較例ではいずれ
も接続部で破裂したのでその破裂時における水圧
をもつて接続部の強度とした。
〔実施例４〜６〕及び〔比較例２〕 密度0.91ｇ/cm3、MI0.5ｇ／10分のポリプロピレ
ンに３−トリメトキシシリルプロピルアジドホル
メート3.0部、ジキユミルパーオキサイド0.2部、
ジ−ブチル−錫−ジラウレート0.05部とからなる
水架橋し得るポリプロピレン組成物を用いて、ポ
リプロピレンのゲル分率が５％（実施例４）、30
％（実施例５）、55％（実施例６）、65％（比較例
２）とした点のみ、実施例１〜３及び比較例１と
異なる実施例４〜６及び比較例２を行なつた。
この水架橋後のパイプ構成ポリプロピレンのゲ
ル分率、接続部の強度はそれぞれ、81％、57Kg/
cm2（実施例４）、82％、55Kg/cm2（実施例５）、81
％、51Kg/cm2（実施例６）、84％、４Kg/cm2（比較
例２）であつた。
〔実施例７〜９〕及び〔比較例３〕 密度0.935ｇ/cm3、MI＝1.2ｇ／10分、酢酸ビニ
ル含有量12重量％のエチレン−酢酸ビニル共重合
ポリマー（以下エチレン−酢酸ビ共重合ポリマ
ー）にビニルトリメトキシシラン2.3部、ジキユ
ミルパーオキサイド0.2部、ジ−ブチル−錫−ジ
ラウレート0.07部とからなる水架橋し得るエチレ
ン−酢ビ共重合ポリマー組成物を用いて、エチレ
ン−酢ビ共重合ポリマーのゲル分率が５％（実施
例７）、30％（実施例８）、55％（実施例９）、65
％（比較例３）とした点のみ、実施例１〜３及び
比較例１と異なる、実施例７〜９及び比較例３を
行なつた。
この水架橋後のパイプ構成エチレン−酢ビ共重
合ポリマーのゲル分率、接続部の強度はそれぞれ
79％、53Kg/cm2（実施例７）、79％、51Kg/cm2（実
施例８）、81％、49Kg/cm2（実施例９）、80％、５
Kg/cm2（比較例３）であつた。

Claims (1)

    【特許請求の範囲】
  1. １ 水架橋性ポリオレフインからなるパイプ同士
    を、該ポリオレフインのゲル分率が５％以上60％
    未満である間に融着により接続し、次いで水によ
    り架橋してポリオレフインのゲル分率を少くとも
    60％に高めることを特徴とするポリオレフインパ
    イプの接続方法。
JP13490081A 1981-08-27 1981-08-27 ポリオレフインパイプの接続方法 Granted JPS5859014A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13490081A JPS5859014A (ja) 1981-08-27 1981-08-27 ポリオレフインパイプの接続方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13490081A JPS5859014A (ja) 1981-08-27 1981-08-27 ポリオレフインパイプの接続方法

Publications (2)

Publication Number Publication Date
JPS5859014A JPS5859014A (ja) 1983-04-07
JPS6153941B2 true JPS6153941B2 (ja) 1986-11-20

Family

ID=15139141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13490081A Granted JPS5859014A (ja) 1981-08-27 1981-08-27 ポリオレフインパイプの接続方法

Country Status (1)

Country Link
JP (1) JPS5859014A (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL142083A0 (en) * 2000-04-28 2002-03-10 Golan Plastic Products Polymeric articles with welding-aimed portion
JP2009107207A (ja) * 2007-10-30 2009-05-21 Maezawa Kyuso Industries Co Ltd ポリオレフィン樹脂を素材とする部材の融着方法
FR3001716B1 (fr) * 2013-02-07 2015-01-30 Illinois Tool Works Reservoir pour automobile en polymere reticule

Also Published As

Publication number Publication date
JPS5859014A (ja) 1983-04-07

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