JPS637139B2 - - Google Patents
Info
- Publication number
- JPS637139B2 JPS637139B2 JP56049923A JP4992381A JPS637139B2 JP S637139 B2 JPS637139 B2 JP S637139B2 JP 56049923 A JP56049923 A JP 56049923A JP 4992381 A JP4992381 A JP 4992381A JP S637139 B2 JPS637139 B2 JP S637139B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- weight
- pretreatment agent
- pfa
- welded
- 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
- 238000003466 welding Methods 0.000 claims description 51
- 239000003795 chemical substances by application Substances 0.000 claims description 27
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 22
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 22
- -1 alkyl vinyl ether Chemical compound 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 239000006185 dispersion Substances 0.000 claims description 9
- 229920002545 silicone oil Polymers 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 3
- 239000002270 dispersing agent Substances 0.000 description 4
- 238000002203 pretreatment Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 239000003945 anionic surfactant Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002736 nonionic surfactant Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000007605 air drying Methods 0.000 description 1
- 125000005037 alkyl phenyl group Chemical group 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- CCDWGDHTPAJHOA-UHFFFAOYSA-N benzylsilicon Chemical compound [Si]CC1=CC=CC=C1 CCDWGDHTPAJHOA-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical class CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920001921 poly-methyl-phenyl-siloxane Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- GPRLSGONYQIRFK-MNYXATJNSA-N triton Chemical compound [3H+] GPRLSGONYQIRFK-MNYXATJNSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- C08J5/124—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives using adhesives based on a macromolecular component
- C08J5/127—Aqueous adhesives
-
- 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
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】
本発明はポリテトラフルオロエチレン（以下
PTFEと略記する。）成形体の熔接用前処理剤及
び熔接強度が高く熔接ムラやピンホール発生など
の問題がないPTFE成形体の熔接方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to polytetrafluoroethylene (hereinafter referred to as
Abbreviated as PTFE. ) A pretreatment agent for welding molded bodies and a method for welding PTFE molded bodies that have high welding strength and are free from problems such as welding unevenness and pinhole formation.
PTFEは極めて優れた耐熱性、耐薬品性及び耐
溶剤性などの化学材料として必要な諸性質を兼備
しているほか、非粘着性・低摩擦性などの特異の
性質を有していることから、特に苛酷な条件下で
使用される化学装置及び機器などのチユーブ・ホ
ース・パイプ・バルブ・コツク・パツキン・ガス
ケツトあるいはライニング材などとして使用され
ている。 PTFE has various properties required as a chemical material, such as extremely high heat resistance, chemical resistance, and solvent resistance, as well as unique properties such as non-adhesion and low friction. It is used as tubes, hoses, pipes, valves, seals, gaskets, gaskets, and lining materials for chemical equipment and equipment used under particularly harsh conditions.
しかしながら、かかる優れたPTFEの諸特性に
も拘らず、その使用例は比較的小型で且つ簡単な
形状の成形品の場合に限られている。それは
PTFEの成形法が基本的には圧縮成形であるため
複雑な形状の製品を成形するのには適さないこ
と、及び圧縮成形物（予備成形物）を高温（約
350〜400℃）で焼成する必要があるため大型の製
品を得るためには、大型の焼成炉が必要となり、
且つ大形の製品になるほど焼成時の温度管理が困
難なものとなるなどの理由による。従つて、比較
的簡単な形状のPTFEの成形品を熔接などの方法
により接続し、大型又は複雑な形状のPTFE製品
を得ることが期待される。 However, despite the excellent properties of PTFE, its use is limited to relatively small and simple shaped molded products. it is
Since the molding method for PTFE is basically compression molding, it is not suitable for molding products with complex shapes, and compression molded products (preforms) are heated at high temperatures (approx.
Since it is necessary to bake at a temperature of 350 to 400℃, a large kiln is required to obtain large products.
Another reason is that the larger the product, the more difficult it becomes to control the temperature during firing. Therefore, it is expected that PTFE products with relatively simple shapes can be connected by methods such as welding to obtain PTFE products with large or complex shapes.
近年テトラフルオロエチレン・パーフルオロ
（アルキルビニルエーテル）共重合体（以下PFA
と略記する。）を介してPTFEを熔接する方法
（特開昭49−119921）が見出され、従前に比して
高い強度の熔接が可能になつたが、信頼性の高い
熔接を行なうためには、かなり高い圧力をかける
必要があつた（特開昭52−63274〜５）。このため
重ね合せ熔接とが突き合せ熔接でも圧力を充分に
かけられる場合には信頼性の高い熔接が可能では
あるが、湾曲部における突き合せ熔接のように圧
力をかけることが困難な箇所での熔接の場合には
熔接強度のムラやピンホールの発生などの問題が
あり、汎用的に使用し得るPTFEの熔接方法は見
出されていなかつた。 In recent years, tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer (PFA)
It is abbreviated as ) was discovered (Japanese Unexamined Patent Publication No. 49-119921), which made it possible to weld with higher strength than before, but it took quite a while to achieve reliable welding. It was necessary to apply high pressure (Japanese Patent Application Laid-Open No. 52-63274-5). For this reason, overlap welding and butt welding can be highly reliable welding if sufficient pressure can be applied, but welding in places where it is difficult to apply pressure such as butt welding on curved parts In this case, there are problems such as uneven welding strength and the occurrence of pinholes, and no universally usable PTFE welding method has been found.
本発明者はかかる問題の解決のために鋭意研究
の結果、熔接前処理剤としてPFAコロイド粒子
を10〜70重量％とシリコーンオイルを0.3〜５重
量％とを含む水性分散液をPTFE成形体の被熔接
面に塗布し、350〜500℃の温度で熔着し、厚さ５
〜30μの前処理剤層を形成した後、PFA製の熔接
材を用い外部加熱熔接法によりPTFE成形体を
350〜500℃の温度で熔接することにより、熔接ム
ラや熔接部のピンホール発生などのない熔接を行
ない得ることを見出し本発明を完成した。 As a result of intensive research in order to solve this problem, the present inventor has developed an aqueous dispersion containing 10 to 70% by weight of PFA colloidal particles and 0.3 to 5% by weight of silicone oil as a pre-welding treatment agent for PTFE molded bodies. Apply to the surface to be welded and melt at a temperature of 350 to 500℃ to a thickness of 5.
After forming a pre-treatment agent layer of ~30μ, a PTFE molded body is formed by external heating welding using a PFA welding material.
The present invention has been completed based on the discovery that welding at a temperature of 350 to 500° C. allows welding to be performed without uneven welding or pinholes in the welded portion.
本発明の熔接前処理剤の主成分であるPFAコ
ロイド粒子は水に安定に分散し得るために平均粒
子径が0.5μ以下の粒子であることが必要である。
かかる粒子は例えば特公昭48−2223、同−20788
及び同−41942などに記載される方法で製造する
ことが可能である。 PFA colloidal particles, which are the main component of the welding pretreatment agent of the present invention, need to have an average particle diameter of 0.5 μm or less in order to be stably dispersed in water.
Such particles are disclosed in, for example, Japanese Patent Publications No. 48-2223 and No. 20788.
It can be manufactured by the method described in JP-A-41942 and the like.
前処理剤中に含まれるPFAコロイド粒子の量
は約10〜70重量％であり、その下限値は限定的な
ものではないが、含有量が少なくなる程前処理剤
の塗布量を多くする必要があり、必然的に塗布回
数及び熔着回数が増加するため、好ましくなく、
少なくとも約10％以上であることが好ましい。又
70重量％を超えるPFAコロイド粒子を含む場合
には分散液の安定性が著しく悪化し、前処理剤の
保存中又は使用中にPFAコロイド粒子が凝固を
起こす虞があり好ましくない。上記の理由から特
に好ましいPFAコロイド粒子の含有量は30〜60
重量％である。 The amount of PFA colloidal particles contained in the pretreatment agent is about 10 to 70% by weight, and the lower limit is not limited, but the lower the content, the more the amount of pretreatment agent applied needs to be increased. This is undesirable because it inevitably increases the number of times of application and welding.
Preferably, it is at least about 10%. or
If the amount of PFA colloidal particles exceeds 70% by weight, the stability of the dispersion will deteriorate significantly, and the PFA colloidal particles may coagulate during storage or use of the pretreatment agent, which is not preferable. For the above reasons, the particularly preferred content of PFA colloidal particles is 30 to 60.
Weight%.
本発明に使用されるシリコーンオイルとしては
ジメチルシリコーン、フエニルメチルシリコー
ン、又はこれらの共重合体で通常油性塗料のレベ
リング剤、あるいは帯電防止剤などの用途を有す
るものが有効であり好ましい。 The silicone oil used in the present invention is preferably dimethyl silicone, phenylmethyl silicone, or a copolymer thereof, which is usually used as a leveling agent for oil-based paints or as an antistatic agent.
上記前処理剤、即ちPFAコロイド粒子とシリ
コーンオイルとを含む水分散液の安定性を増加す
るために通常該分散液中に分散剤としてノニオン
又はアニオン系界面活性剤を存在させる。分散剤
の量はPFAコロイド粒子及びシリコーンオイル
の含有量によつて異なるが、分散質に対し１〜10
重量％である。分散剤の量が１％未満の場合に
は、分散液の安定性の向上をあまり期待すること
ができず、又10％を超える場合には分散液の粘度
が高くなりすぎる傾向があり、良好な塗布が困難
になる。分散剤としては例えばポリオキシエチレ
ンアルキルフエニルエーテルやラウリルアルコー
ルの硫酸エステル塩などのノニオン及びアニオン
界面活性剤が好ましい分散剤として使用される。 In order to increase the stability of the aqueous dispersion containing the above-mentioned pretreatment agent, ie, PFA colloidal particles and silicone oil, a nonionic or anionic surfactant is usually present as a dispersant in the dispersion. The amount of dispersant varies depending on the content of PFA colloidal particles and silicone oil, but is 1 to 10% per dispersoid.
Weight%. If the amount of dispersant is less than 1%, we cannot expect much improvement in the stability of the dispersion, and if it exceeds 10%, the viscosity of the dispersion tends to become too high, which is not good. coating becomes difficult. Preferred dispersants include nonionic and anionic surfactants such as polyoxyethylene alkyl phenyl ether and sulfuric ester salts of lauryl alcohol.
上記前処理剤の使用方法はPTFE成形体の被熔
接面に該前処理剤を塗布し、ついで350〜500℃の
温度で熔着することにより、PTFE成形体の被熔
接面に厚さ５〜30μの前処理剤層を形成するもの
である。前処理剤の熔着温度は350〜500℃、特に
400〜450℃であることが好ましく、一方熔着温度
が350℃未満の場合には熔着が不充分となり、熔
接強さが低くなり又500℃を超える場合には基材
であるPTFE及び前処理剤の主成分であるPFA
が熱分解し、同じく熔接強さを低くするという問
題がある。 The method for using the above pre-treatment agent is to apply the pre-treatment agent to the surface to be welded of the PTFE molded body, and then weld it at a temperature of 350 to 500°C. A 30 μm pretreatment agent layer is formed. The welding temperature of the pretreatment agent is 350 to 500℃, especially
A temperature of 400 to 450°C is preferable; on the other hand, if the welding temperature is less than 350°C, the welding will be insufficient and the welding strength will be low, and if it exceeds 500°C, the base material PTFE and the front PFA, the main component of the processing agent
There is also the problem that the welding strength deteriorates due to thermal decomposition.
又、前処理剤の塗布方法は刷毛塗り、吹付け、
流しかけなど一般に用いられる塗布方法のいかな
る方法でも良いが、熔着後の前処理剤層の厚さが
５〜30μになるように塗布することが肝要であ
る。前処理剤層の厚さが5μ未満の場合には充分
な前処理効果が期待できず、又30μを起える場合
には前処理剤の熔着時前処理剤層に亀裂が生じる
ため好ましくない。 In addition, the pretreatment agent can be applied by brushing, spraying,
Any commonly used coating method such as pouring may be used, but it is important to coat the pretreatment agent layer so that the thickness of the pretreatment agent layer after welding is 5 to 30 μm. If the thickness of the pretreatment agent layer is less than 5μ, a sufficient pretreatment effect cannot be expected, and if the thickness is 30μ, it is not preferable because cracks will occur in the pretreatment agent layer when the pretreatment agent is welded. .
熔接はPFA製の熔接棒又はフイルムなどを用
い、例えば熱風熔接、熱板熔接などの外部から加
熱する方法で行なわれる。とくに熔接時圧力をか
けにくい熱風熔接は熔接ムラやピンホールが生じ
易く、かかる欠点を解決できる本発明の方法は熱
風熔接においてとくに著しい効果がみられる。 Welding is performed using a welding rod or film made of PFA, for example, by a method of heating from the outside, such as hot air welding or hot plate welding. In particular, hot air welding, in which it is difficult to apply pressure during welding, tends to cause welding unevenness and pinholes, and the method of the present invention, which can solve these drawbacks, is particularly effective in hot air welding.
尚本発明の熔接は通常PTFEの熔接に用いられ
る温度である350〜500℃でとくに380〜480℃の範
囲で行なうことが推奨される。 It is recommended that the welding of the present invention be carried out at a temperature of 350 to 500°C, which is the temperature normally used for welding PTFE, and particularly in the range of 380 to 480°C.
実施例
安定剤としてロームアンドハース社製トライト
ン（ポリオキシエチレンフエニール系界面活性
剤）３重量％とPFAコロイド粒子を55重量％と
を含む水性デイスパージヨン100重量部に対しシ
リコーンオイル（商品名：NUCシリコーン・ブ
ロツクコポリマー）２重量部を添加混合すること
によりポリテトラフルオロエチレン成形体用前処
理剤を得た。Example Silicone oil (trade name) was added to 100 parts by weight of an aqueous dispersion containing 3% by weight of Triton (polyoxyethylene phenyl surfactant) manufactured by Rohm and Haas as a stabilizer and 55% by weight of PFA colloid particles. A pretreatment agent for polytetrafluoroethylene molded articles was obtained by adding and mixing 2 parts by weight of NUC silicone block copolymer.
次に厚さ２mmのポリテトラフルオロエチレン製
切削シートの突き合せ熔接面に開先角度60゜とり、
該開先面及びその両側10mmの熔接面に上記前処理
剤をハケ塗りし風乾した。風乾後開先面に480℃
の熱風を吹きつけ、厚さ10μの前処理剤の溶接層
を得た。ついで、PFA製直径３mmの溶接棒によ
り開先面を熱風突き合せ溶接した。熔接条件は熱
風温度420℃、溶接速度80mm／minである。この
溶接された開先面上に更に厚さ2.5mm、巾14.5mm
のPFA製テープをのせ同じく熱風重ね合せ溶接
を行なつた。熔接条件は同じである。 Next, a bevel angle of 60° was prepared on the butt welding surfaces of 2 mm thick polytetrafluoroethylene cut sheets.
The above pretreatment agent was brushed onto the groove surface and the welded surfaces of 10 mm on both sides thereof and air-dried. 480℃ on the groove surface after air drying
A welding layer of pretreatment agent with a thickness of 10μ was obtained by blowing hot air. Then, the groove surfaces were hot-air butt welded using a PFA welding rod with a diameter of 3 mm. The welding conditions were a hot air temperature of 420°C and a welding speed of 80mm/min. Further on this welded groove surface, the thickness is 2.5mm and the width is 14.5mm.
The same PFA tape was placed and hot air lap welding was performed. The welding conditions are the same.
得られた熔接シートを溶接方向に巾10mm、長さ
100mmの短冊型のサンプルをとり引張り強さ及び
伸びを測定した。引張り強さは157Kg／cm2であり、
伸びは450％であつた。又、該熔接シートの熔接
線上5mにわたり電測工業株式会社製ピンホール
テスターを使用し、電圧20KVでピンホール数を
測定した。ピンホール数は０であつた。 The obtained welded sheet is 10mm wide and long in the welding direction.
A 100 mm rectangular sample was taken and its tensile strength and elongation were measured. The tensile strength is 157Kg/ cm2 ,
The growth was 450%. In addition, the number of pinholes was measured over a 5 m distance on the weld line of the welded sheet using a pinhole tester manufactured by Densoku Kogyo Co., Ltd. at a voltage of 20 KV. The number of pinholes was 0.
前処理剤を塗布せず、同様の方法により溶接し
たポリテトラフルオロエチレンシートの引張り強
さ、伸び、ピンホール数は夫々124Kg／cm2、50％、
４個所であつた。 The tensile strength, elongation, and number of pinholes of a polytetrafluoroethylene sheet welded using the same method without applying a pretreatment agent were 124 Kg/cm 2 and 50%, respectively.
It was hot in 4 places.
Claims (1)
ルキルビニルエーテル）共重合体のコロイド粒子
を10〜70重量％と、シリコーンオイルを0.3〜５
重量％とを含む水性分散液からなるポリテトラフ
ルオロエチレン成形体用の熔接前処理剤。 ２ ポリテトラフルオロエチレン成形体の被熔接
面にテトラフルオロエチレン／パーフルオロ（ア
ルキルビニルエーテル）共重合体のコロイド粒子
を10〜70重量％と、シリコーンオイルを0.3〜５
重量％とを含む水性分散液からなるポリテトラフ
ルオロエチレン成形体用の熔接前処理剤を塗布
し、350〜500℃の温度で熔着し、厚さ５〜30μの
前処理剤層を形成した後、PFA製の熔接材を用
い外部加熱熔接法により、ポリテトラフルオロエ
チレン成形体を350〜500℃の温度で熔接すること
を特徴とするポリテトラフルオロエチレン成形体
の熔接方法。[Claims] 1. 10 to 70% by weight of colloidal particles of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer and 0.3 to 5% by weight of silicone oil.
A pre-welding treatment agent for polytetrafluoroethylene molded bodies, comprising an aqueous dispersion containing % by weight. 2 10 to 70% by weight of colloidal particles of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer and 0.3 to 5% of silicone oil are applied to the surface to be welded of the polytetrafluoroethylene molded body.
A welding pretreatment agent for polytetrafluoroethylene molded bodies consisting of an aqueous dispersion containing % by weight was applied and welded at a temperature of 350 to 500°C to form a pretreatment agent layer with a thickness of 5 to 30μ. A method for welding a polytetrafluoroethylene molded body, which comprises subsequently welding the polytetrafluoroethylene molded body at a temperature of 350 to 500°C by an external heating welding method using a welding material made of PFA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56049923A JPS57163524A (en) | 1981-04-02 | 1981-04-02 | Welding pretreating agent for polytetrafluoroethylene molded object and method for welding same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56049923A JPS57163524A (en) | 1981-04-02 | 1981-04-02 | Welding pretreating agent for polytetrafluoroethylene molded object and method for welding same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57163524A JPS57163524A (en) | 1982-10-07 |
| JPS637139B2 true JPS637139B2 (en) | 1988-02-15 |
Family
ID=12844529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56049923A Granted JPS57163524A (en) | 1981-04-02 | 1981-04-02 | Welding pretreating agent for polytetrafluoroethylene molded object and method for welding same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57163524A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004052627A1 (en) * | 2002-12-12 | 2004-06-24 | Daikin Industries, Ltd. | Covering material for welding, jointed structures, welding procedure, welded articles and composite structures |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62541A (en) * | 1985-06-26 | 1987-01-06 | Daikin Ind Ltd | Aqueous dispersion composition |
| IT1285771B1 (en) * | 1996-10-04 | 1998-06-18 | Ausimont Spa | COUPLED PIFE WITH SUBSTRATES |
-
1981
- 1981-04-02 JP JP56049923A patent/JPS57163524A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004052627A1 (en) * | 2002-12-12 | 2004-06-24 | Daikin Industries, Ltd. | Covering material for welding, jointed structures, welding procedure, welded articles and composite structures |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57163524A (en) | 1982-10-07 |
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