JPH0440069Y2 - - Google Patents
Info
- Publication number
- JPH0440069Y2 JPH0440069Y2 JP19234587U JP19234587U JPH0440069Y2 JP H0440069 Y2 JPH0440069 Y2 JP H0440069Y2 JP 19234587 U JP19234587 U JP 19234587U JP 19234587 U JP19234587 U JP 19234587U JP H0440069 Y2 JPH0440069 Y2 JP H0440069Y2
- Authority
- JP
- Japan
- Prior art keywords
- ptfe
- tube
- antistatic
- present
- conductive substance
- 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
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 48
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 48
- 239000000126 substance Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 8
- -1 polytetrafluoroethylene Polymers 0.000 claims description 7
- 239000006229 carbon black Substances 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 239000000571 coke Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 10
- 239000000843 powder Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 6
- 238000005192 partition Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000000181 anti-adherent effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案はポリテトラフルオロエチレン（以下、
PTFEという）管に関する。さらに詳しくは帯電
防止部分と透明部分とからなり、たとえば粉体や
腐食性流体、可燃性流体および高粘度流体の輸送
などに用いられるPTFE管に関する。[Detailed description of the invention] [Industrial application field] This invention uses polytetrafluoroethylene (hereinafter referred to as
Regarding pipes (called PTFE). More specifically, the present invention relates to a PTFE tube that is comprised of an antistatic portion and a transparent portion and is used for transporting powder, corrosive fluids, flammable fluids, and high viscosity fluids, for example.
なお、本明細書でいうPTFE管とは、PTFEに
たとえば導電性物質などが加えられたものを用い
た管をも含む概念である。 Note that the term PTFE tube as used herein includes a tube made of PTFE to which, for example, a conductive substance is added.
［従来の技術］
PTFE管は耐熱性、耐薬品性および被粘着性に
優れており、従来より、たとえば粉体や腐食性流
体、可燃性流体および高粘度流体の輸送などに用
いられている。[Prior Art] PTFE pipes have excellent heat resistance, chemical resistance, and anti-adhesive properties, and have been conventionally used for transporting, for example, powders, corrosive fluids, flammable fluids, and high viscosity fluids.
［考案が解決しようとする問題点］
しかしながら、PTFE管は固有抵抗が1018〜
1019Ω・cmと高く、容易に帯電するため、たとえ
ば管中での粉体のつまりや、可燃性流体の発火な
ど安全性の面で問題がある。[Problems that the invention attempts to solve] However, the specific resistance of PTFE pipe is 10 18 ~
Because it has a high electrical charge of 10 to 19 Ωcm and is easily charged, it poses safety problems such as clogging of powder in pipes and ignition of flammable fluids.
そこで、PTFEに導電性物質を混合せしめ、体
積固有抵抗を小さくすることによつてこの問題を
解決することが考えられる。 Therefore, it may be possible to solve this problem by mixing a conductive substance with PTFE to reduce the volume resistivity.
しかしながら、前記導電性物質は黒色であるた
め管も黒色を呈してしまい、管の内部が見えない
ので、内容物の移送状態が外からはわからず、と
くに内容物がつまつたときなどにもその場所が判
明しないという問題を生ずる。 However, since the conductive substance is black, the tube also appears black, and the inside of the tube cannot be seen, so the transfer state of the contents cannot be seen from the outside, especially when the contents become clogged. A problem arises in that the location cannot be determined.
本考案は前記問題を解決するためになされたも
のであり、たとえば粉体や高粘度流体の輸送など
に用いるばあいに、容易に帯電しにくく、かつ、
外から管の内部が見えるPTFE管を提供すること
を目的とする。 The present invention was made to solve the above problems, and when used for transporting powder or high viscosity fluid, for example, it is difficult to be easily charged, and
The purpose is to provide a PTFE tube that allows the inside of the tube to be seen from the outside.
［問題点を解決するための手段］
本考案はPTFEおよび導電性物質の組成物から
なる帯電防止部分と、PTFEの単一成分からなる
透明部分とからなるPTFE管に関する。Means for Solving the Problems The present invention relates to a PTFE tube comprising an antistatic portion made of a composition of PTFE and a conductive material and a transparent portion made of a single component of PTFE.
［作用］
本考案のPTFE管は、帯電防止部分と透明部分
とからなるため、たとえば粉体や高粘度流体の輸
送などに用いられたばあいにも、帯電しにくく、
かつ、外から管の内部が目視できる。[Function] Since the PTFE tube of the present invention consists of an antistatic part and a transparent part, it is difficult to be charged, even when used for transporting powder or high viscosity fluids.
Moreover, the inside of the tube can be visually observed from the outside.
［実施例］
本考案に用いる導電性物質としては、PTFEお
よび該導電性物質の組成物としてPTFE管の帯電
防止部分を形成しうるものであれば制限なく用い
ることができるが、とくに、カーボンブラツク、
カーボン繊維、グラフアイトおよびコークスから
なる群より選ばれた少なくとも１種が、工業上容
易に入手することができ経済的にも安価であるこ
とから好ましい。[Example] As the conductive substance used in the present invention, any material can be used without limitation as long as it can form the antistatic part of the PTFE tube as a composition of PTFE and the conductive substance, but carbon black is particularly suitable. ,
At least one selected from the group consisting of carbon fiber, graphite, and coke is preferred because it is industrially easily available and economically inexpensive.
また、金、銀、銅などの金属粉はそれ自体の価
格および充填量の多さから経済的に高価なものと
なり好ましくない。 In addition, metal powders such as gold, silver, and copper are economically expensive due to their own price and the large amount of filling, which is undesirable.
なお、本明細書においてPTFEとは、TFEの
単独重合体のみならず、２重量％以下の共重合モ
ノマー、たとえばパーフルオロアルキルビニルエ
ーテル、クロロトリオロエチレン、ヘキサフルオ
ロプロピレンなどのうち少なくとも１種を共重合
したものをも含む概念である。 In this specification, PTFE refers to not only a homopolymer of TFE but also a copolymer containing at least 2% by weight of at least one copolymer monomer such as perfluoroalkyl vinyl ether, chlorotrioloethylene, hexafluoropropylene, etc. This concept also includes polymerized products.
前記PTFEおよび導電性物質の組成物における
導電性物質の割合は、導電性物質の種類によつて
も異なるが、通常PTFEに対して５〜20重量％の
範囲である。 The proportion of the conductive substance in the composition of PTFE and conductive substance varies depending on the type of conductive substance, but is usually in the range of 5 to 20% by weight based on PTFE.
前記PTFEおよび導電性物質の組成物からなる
帯電防止部分の体積固有抵抗は、管全体の帯電防
止効果の点で、108Ω・cm以下であるのが好まし
い。 The volume resistivity of the antistatic portion made of the composition of PTFE and a conductive substance is preferably 10 8 Ω·cm or less in terms of the antistatic effect of the entire tube.
前記帯電防止部分と、PTFEの単一成分からな
る透明部分とからなるPTFE管における帯電防止
部分および透明部分の形状は、とくに限定される
ものではなく、たとえば管の軸方向の縦縞形状、
らせん形状などをあげることができるが、製造の
容易さの点から縦縞形状が好ましい。 The shapes of the antistatic part and the transparent part in the PTFE tube, which are composed of the antistatic part and the transparent part made of a single component of PTFE, are not particularly limited, and may be, for example, a vertical striped shape in the axial direction of the tube,
Examples include a spiral shape, but a vertical stripe shape is preferred from the viewpoint of ease of manufacture.
また、透明部分の割合についても、外から内部
の状況が目視できる程度であればとくに制限はな
いが、透明部分が全体の20〜80％であるのが成形
が容易である点で好ましい。 Further, there is no particular restriction on the proportion of the transparent part as long as the inside condition can be visually observed from the outside, but it is preferable that the transparent part accounts for 20 to 80% of the whole in terms of ease of molding.
第１図は本考案のPTFE管の一例を示す斜視図
である。第１図において１は帯電防止部分、２は
透明部分を示す。 FIG. 1 is a perspective view showing an example of the PTFE tube of the present invention. In FIG. 1, numeral 1 indicates an antistatic portion and numeral 2 indicates a transparent portion.
つぎに本考案のPTFE管の製造方法の一例を説
明する。 Next, an example of the method for manufacturing the PTFE tube of the present invention will be explained.
第２図は本考案のPTFE管の製造に用いる予備
成形品の成形装置の一例を示す概略断面図、第３
図は第２図の線Ｉ−Ｉにおける横断面図、第４図
は本考案のPTFE管の製造に用いられる押出装置
の一例を示す概略断面図である。 Figure 2 is a schematic cross-sectional view showing an example of a preform molding device used for manufacturing the PTFE tube of the present invention;
The figure is a cross-sectional view taken along line II in FIG. 2, and FIG. 4 is a schematic cross-sectional view showing an example of an extrusion apparatus used for manufacturing the PTFE tube of the present invention.
第２図および第３図に示されるように装置を使
用して、まず予備成形品が成形される。仕切板１
４が設けられたシリンダ１１にマンドレル１２が
通され、PTFE、導電性物質および成形助剤（ソ
ルベントナフサ、ホワイトオイルなどの有機溶
剤）の組成物と、PTFE粉末および成形助剤とが
仕切板１４で仕切られた各区間に交互にそれぞれ
投入される。ついで油圧装置１３により、５波20
Kgｆ／cm2の圧力で矢印Ａ方向に圧縮され円筒状の
予備成形品が成形される。 A preform is first formed using the apparatus shown in FIGS. 2 and 3. Partition plate 1
A mandrel 12 is passed through a cylinder 11 provided with a partition plate 14, and a composition of PTFE, a conductive substance and a forming aid (organic solvent such as solvent naphtha and white oil), PTFE powder and a forming aid are passed through a cylinder 11 provided with a partition plate 14. They are placed alternately in each section separated by . Then, by the hydraulic device 13, 5 waves 20
It is compressed in the direction of arrow A under a pressure of Kgf/cm 2 to form a cylindrical preform.
つぎに、えられた予備成形品は第４図に示され
るような装置のシリンダ２１に入れられ、ラム２
３で矢印Ｂ方向に加圧されて押出成形される。な
お図中２２はマンドレルである。 Next, the obtained preform is placed in a cylinder 21 of the apparatus shown in FIG.
At 3, pressure is applied in the direction of arrow B and the material is extruded. In the figure, reference numeral 22 denotes a mandrel.
押し出された未焼成成形物は、温度約100〜250
℃の乾燥ゾーンおよび温度約370〜390℃の焼成ゾ
ーンを順に通過せしめられて焼成成形物とされ、
本考案のPTFE管がえられる。 The temperature of the extruded unfired molded product is approximately 100 to 250
The product is passed through a drying zone at a temperature of approximately 370 to 390 degrees Celsius in order, and a firing zone at a temperature of approximately 370 to 390 degrees Celsius to form a fired molded product.
The PTFE tube of the present invention is obtained.
なお、前記油圧装置１３による予備成形以降の
工程は通常のPTFEペースト押出成形と同様の工
程である。 Note that the steps after preforming by the hydraulic device 13 are the same as those for normal PTFE paste extrusion molding.
実施例１および比較例１
PTFEおよび導電性物質の組成物としてPTFE
にカーボンブラツクが５重量％加えられたポリフ
ロンフアインパウダーFPG−5010（ダイキン工業
(株)製）を1.5Kg使用しこれに成形助剤としてアイ
ソパーＥ（エクソン社製）25重量部を添加混合し
たものおよびPTFEとしてポリフロンフアインパ
ウダーＦ−203（ダイキン工業(株)製）を1.5Kg使用
しこれに成形助剤としてアイソパーE20重量部を
添加混合したものをそれぞれ原料として用いた。Example 1 and Comparative Example 1 PTFE as a composition of PTFE and conductive material
Polyfluorine powder FPG-5010 (Daikin Industries) with 5% by weight of carbon black added to
1.5 kg of Isopar E (manufactured by Exxon) was used as a molding aid, and 25 parts by weight of Isopar E (manufactured by Exxon) was added as a molding aid, and as PTFE, Polyfluorine Powder F-203 (manufactured by Daikin Industries, Ltd.) was mixed. A mixture of 1.5 kg of Isopar E and 20 parts by weight of Isoper E as a molding aid was used as a raw material.
前述の製造方法例に基づき、仕切板が設けられ
たシリンダを用いてまず予備成形し、ついで押し
出し成形したのち、乾燥および焼成して、外径８
mm、内径６mmの第１図のごとき実施例１のPTFE
管をえた。 Based on the above-mentioned manufacturing method example, a cylinder provided with a partition plate is first preformed, then extruded, dried and fired to obtain an outer diameter of 8.
PTFE of Example 1 as shown in Figure 1 with an inner diameter of 6 mm
I got a tube.
比較のため、原料としてポリフロンフアインパ
ウダーＦ−203のみを使用し仕切板のないシリン
ダを用いて予備成形した以外は実施例１と同様に
して透明部分のみからなる比較例１のPTFE管を
えた。 For comparison, a PTFE tube of Comparative Example 1 consisting of only a transparent portion was prepared in the same manner as in Example 1, except that only polyfluorine powder F-203 was used as the raw material and preforming was performed using a cylinder without a partition plate. I got it.
えられた２つのPTFE管の外表面をナイロン布
で30回こすることにより帯電操作を行ない、該帯
電操作の前後の帯電量を携帯型静電気測定器（シ
ムコSS−２型、シムコジヤパン(株)製）で測定し
た。なお、測定は被検体より50mm離れたところで
行なつた。測定の結果、実施例１のPTFE管の帯
電量は帯電操作前がOV、操作後が60〜110Vであ
り、比較例１の帯電量は帯電操作前が80〜200V、
操作後が280〜6000Vであつた。 Charging was performed by rubbing the outer surfaces of the two PTFE tubes 30 times with a nylon cloth, and the amount of charge before and after the charging was measured using a portable static meter (Shimco SS-2 model, Simco Japan Co., Ltd.). ) manufactured by ). Note that the measurement was performed at a distance of 50 mm from the subject. As a result of the measurement, the amount of charge on the PTFE tube of Example 1 was OV before the charging operation and 60 to 110 V after the operation, and the amount of charge in Comparative Example 1 was 80 to 200 V before the charging operation, and 60 to 110 V before the charging operation.
After operation, the voltage was 280 to 6000V.
このことより、本考案のPTFE管の帯電防止効
果がすぐれていることがわかる。 This shows that the PTFE tube of the present invention has an excellent antistatic effect.
［考案の効果］
本考案により、管外部から目視により管内の内
容物の有無、移送状態などがわかり、かつ帯電防
止効果のあるPTFE管が提供される。本願考案の
PTFE管はたとえば粉体、高粘度流体などの輸送
管などに好適に用いることができる。[Effects of the invention] The invention provides a PTFE tube that allows the presence or absence of contents inside the tube, the transfer status, etc. to be determined visually from the outside of the tube, and has an antistatic effect. The invention of this application
PTFE pipes can be suitably used, for example, as transport pipes for powders, high viscosity fluids, and the like.
第１図は本考案のPTFE管の一例を示す斜視
図、第２図は本考案のPTFE管の製造に用いられ
る予備成形品の成形装置の一例を示す概略断面
図、第３図は第２図の線Ｉ−Ｉにおける概略横断
面図、第４図は本考案のPTFE管の製造に用いら
れる押出装置の一例を示す概略断面図である。
図面の主要符号、１……帯電防止部分、２……
透明部分。
Fig. 1 is a perspective view showing an example of the PTFE tube of the present invention, Fig. 2 is a schematic sectional view showing an example of a preform molding device used for manufacturing the PTFE pipe of the present invention, and Fig. 3 is a perspective view showing an example of the PTFE pipe of the present invention. FIG. 4 is a schematic cross-sectional view taken along line I--I in the figure, and FIG. 4 is a schematic cross-sectional view showing an example of an extrusion apparatus used for manufacturing the PTFE tube of the present invention. Main symbols in the drawings, 1... antistatic part, 2...
transparent part.
Claims (1)
質の組成物からなる帯電防止部分と、ポリテト
ラフロオロエチレンの単一成分からなる透明部
分とからなるポリテトラフルオロエチレン管。 ２ 導電性物質が、カーボンブラツク、カーボン
繊維、グラフアイトおよびコークスからなる群
より選ばれた少なくとも１種である実用新案登
録請求の範囲第１項記載のポリテトラフルオロ
エチレン管。 ３ 帯電防止部分の体積固有抵抗が108Ω・cm以
下である実用新案登録請求の範囲第１項記載の
ポリテトラフルオロエチレン管。[Claims for Utility Model Registration] 1. A polytetrafluoroethylene pipe comprising an antistatic portion made of a composition of polytetrafluoroethylene and a conductive substance, and a transparent portion made of a single component of polytetrafluoroethylene. 2. The polytetrafluoroethylene pipe according to claim 1, wherein the conductive material is at least one selected from the group consisting of carbon black, carbon fiber, graphite, and coke. 3. The polytetrafluoroethylene pipe according to claim 1, wherein the antistatic portion has a volume resistivity of 10 8 Ω·cm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19234587U JPH0440069Y2 (en) | 1987-12-17 | 1987-12-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19234587U JPH0440069Y2 (en) | 1987-12-17 | 1987-12-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0196593U JPH0196593U (en) | 1989-06-27 |
| JPH0440069Y2 true JPH0440069Y2 (en) | 1992-09-18 |
Family
ID=31483207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19234587U Expired JPH0440069Y2 (en) | 1987-12-17 | 1987-12-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0440069Y2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004169746A (en) * | 2002-11-18 | 2004-06-17 | Japan Organo Co Ltd | Fluid transfer piping, fluid transfer device, and assembling method |
| JP4626230B2 (en) * | 2004-09-02 | 2011-02-02 | 東海ゴム工業株式会社 | Fuel hose |
| JP5368861B2 (en) * | 2009-04-13 | 2013-12-18 | 株式会社八興 | Antistatic resin hose |
| DE102010039328A1 (en) * | 2010-08-13 | 2012-02-16 | Protechna S.A. | Removal fitting for a transport and storage container for liquids as well as transport and storage containers with such a removal fitting |
| JP6347669B2 (en) * | 2014-05-23 | 2018-06-27 | 日本ピラー工業株式会社 | Antistatic cover |
| WO2024071094A1 (en) * | 2022-09-29 | 2024-04-04 | 日星電気株式会社 | Antistatic tube |
| JP2024068426A (en) * | 2022-11-08 | 2024-05-20 | 川崎重工業株式会社 | Granular insulation filling device |
| JP2024068427A (en) * | 2022-11-08 | 2024-05-20 | 川崎重工業株式会社 | Granular insulation filling device and method |
-
1987
- 1987-12-17 JP JP19234587U patent/JPH0440069Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0196593U (en) | 1989-06-27 |
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