JP3241771B2 - Method for producing polytetrafluoroethylene tape - Google Patents

Method for producing polytetrafluoroethylene tape

Info

Publication number
JP3241771B2
JP3241771B2 JP31798891A JP31798891A JP3241771B2 JP 3241771 B2 JP3241771 B2 JP 3241771B2 JP 31798891 A JP31798891 A JP 31798891A JP 31798891 A JP31798891 A JP 31798891A JP 3241771 B2 JP3241771 B2 JP 3241771B2
Authority
JP
Japan
Prior art keywords
ptfe
tape
polytetrafluoroethylene
tapes
melting point
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 - Fee Related
Application number
JP31798891A
Other languages
Japanese (ja)
Other versions
JPH05147108A (en
Inventor
村 忠 嗣 中
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.)
Nippon Valqua Industries Ltd
Original Assignee
Nippon Valqua Industries 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 Nippon Valqua Industries Ltd filed Critical Nippon Valqua Industries Ltd
Priority to JP31798891A priority Critical patent/JP3241771B2/en
Publication of JPH05147108A publication Critical patent/JPH05147108A/en
Application granted granted Critical
Publication of JP3241771B2 publication Critical patent/JP3241771B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • 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
    • B29C66/01—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
    • B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
    • 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
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83415—Roller, cylinder or drum types the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91441—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time
    • B29C66/91443—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time following a temperature-time profile
    • B29C66/91445—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time following a temperature-time profile by steps
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • B29C66/91931—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined
    • B29C66/91933—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined higher than said fusion temperature
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • B29C66/91931—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined
    • B29C66/91935—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined lower than said fusion temperature
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/435—Making large sheets by joining smaller ones or strips together
    • 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
    • B29C66/735—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 extensive physical properties of the parts to be joined
    • B29C66/7352—Thickness, e.g. very thin
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/949—Measuring or controlling the joining process by measuring or controlling the time characterised by specific time values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の技術分野】本発明は、ポリテトラフルオロエチ
レン（ＰＴＦＥ）製テープの製造方法に関し、さらに詳
しくは、ＰＴＦＥを原料として、ピンホール、ボイドあ
るいは傷がないＰＴＦＥ製テープを製造しうるＰＴＦＥ
製テープの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a polytetrafluoroethylene (PTFE) tape, and more particularly, to a method for producing a PTFE tape having no pinholes, voids or scratches from PTFE.
The present invention relates to a method for manufacturing a tape.

【０００２】[0002]

【発明の技術的背景】ポリテトラフルオロエチレン樹脂
は、優れた耐薬品性、耐熱性、機械的特性を有するた
め、種々の分野で用いられている。たとえばＰＴＦＥ製
テープは、絶縁テープ、耐腐食性テープあるいはライニ
ングテープなどとして広く用いられている。BACKGROUND OF THE INVENTION Polytetrafluoroethylene resins have been used in various fields because of their excellent chemical resistance, heat resistance and mechanical properties. For example, PTFE tapes are widely used as insulating tapes, corrosion-resistant tapes, lining tapes, and the like.

【０００３】このようなＰＴＦＥ製テープは、従来、た
とえば懸濁重合法によって得られるＰＴＦＥ粒子（ＰＴ
ＦＥモールディング粒子）を圧縮成形してＰＴＦＥブロ
ックを形成し、このブロックを切削することによって製
造されてきた。[0003] Such a PTFE tape has conventionally been prepared by using, for example, PTFE particles (PT
FE molding particles) have been produced by compression molding to form a PTFE block and cutting this block.

【０００４】またＰＴＦＥ製テープは、乳化重合法によ
って得られるＰＴＦＥ粒子（ＰＴＦＥファインパウダ
ー）を押出し、次いでカレンダーロールによって圧延す
ることによっても製造されてきた。[0004] PTFE tapes have also been produced by extruding PTFE particles (PTFE fine powder) obtained by an emulsion polymerization method, and then rolling them by calender rolls.

【０００５】ところが上記のようにして得られたＰＴＦ
Ｅ製テープには、切削時に傷が生じたり、ピンホールあ
るいはボイドなどが存在したりし、このようなＰＴＦＥ
製テープを絶縁テープとして用いると、絶縁破壊強度に
ばらつきが生ずるなどの問題点があった。またＰＴＦＥ
製テープを耐腐食性テープ（防食テープ）あるいはライ
ニングテープとして用いる場合に、切削傷、ピンホール
あるいはボイドなどがあると腐食液などが漏れることが
あるなどの問題点があった。However, the PTF obtained as described above
E tapes may have scratches during cutting, or have pinholes or voids.
The use of a tape made as an insulating tape has a problem that the dielectric breakdown strength varies. Also PTFE
In the case where the tape manufactured is used as a corrosion-resistant tape (corrosion-resistant tape) or a lining tape, there is a problem that a cutting solution, a pinhole, a void, or the like may leak a corrosive liquid.

【０００６】したがって、切削傷、ピンホールあるいは
ボイドなどがなく、絶縁破壊強度などに優れたＰＴＦＥ
製テープの出現が望まれていた。Accordingly, PTFE which is free from cutting scratches, pinholes or voids and has excellent dielectric breakdown strength.
The advent of tapes was desired.

【０００７】[0007]

【発明の目的】本発明は、上記のような従来技術に伴な
う問題点を解決しようとするものであって、傷、ピンホ
ールあるいはボイドなどがなく、絶縁破壊強度に優れた
ＰＴＦＥ製テープの製造方法を提供することを目的とし
ている。SUMMARY OF THE INVENTION An object of the present invention is to solve the problems associated with the prior art as described above, and to provide a PTFE tape which is free from scratches, pinholes or voids and has excellent dielectric breakdown strength. The purpose of the present invention is to provide a manufacturing method.

【０００８】[0008]

【発明の概要】本発明に係るポリテトラフルオロエチレ
ン製テープの製造方法は、少なくとも２枚の原反として
のポリテトラフルオロエチレン製テープを融点未満の温
度に加熱して圧着し、次いで得られたポリテトラフルオ
ロエチレン製テープ圧着体をポリテトラフルオロエチレ
ンの融点以上に加熱して一体化することを特徴としてい
る。SUMMARY OF THE INVENTION In the method for producing a polytetrafluoroethylene tape according to the present invention, at least two polytetrafluoroethylene tapes as raw materials are heated to a temperature lower than the melting point and pressure-bonded. It is characterized in that the polytetrafluoroethylene tape press-bonded body is heated and integrated above the melting point of polytetrafluoroethylene.

【０００９】本発明によれば、切削傷、ピンホールある
いはボイドなどがなく、絶縁破壊強度などに優れたＰＴ
ＦＥ製テープを製造することができる。According to the present invention, there is provided a PT which is free from cutting flaws, pinholes, voids, etc. and has excellent dielectric breakdown strength.
An FE tape can be manufactured.

【００１０】[0010]

【発明の具体的説明】以下、本発明に係るＰＴＦＥ製テ
ープの製造方法について具体的に説明する。本発明で
は、まず、従来公知の方法によって、原反として用いら
れる少なくとも２枚のＰＴＦＥ製テープを作成する。以
下この工程について簡単に説明するが、これに限定され
ない。DETAILED DESCRIPTION OF THE INVENTION Hereinafter, a method for producing a PTFE tape according to the present invention will be specifically described. In the present invention, first, at least two PTFE tapes used as raw materials are prepared by a conventionally known method. The following briefly describes this step, but is not limited to this.

【００１１】原反として用いられるＰＴＦＥ製テープ
は、たとえばテトラフルオロエチレンの懸濁重合法によ
って得られるＰＴＦＥ粒子（ＰＴＦＥモールディングパ
ウダー）を原料として作成される。このＰＴＦＥモール
ディングパウダーの平均粒子径は、好ましくは１〜９０
０μｍ、さらに好ましくは１〜５０μｍ程度である。A PTFE tape used as a raw material is prepared using PTFE particles (PTFE molding powder) obtained by, for example, a suspension polymerization method of tetrafluoroethylene. The average particle size of the PTFE molding powder is preferably from 1 to 90.
0 μm, more preferably about 1 to 50 μm.

【００１２】このようなＰＴＦＥモールディングパウダ
ーを圧縮成形して予備成形体とし、この予備成形体を融
点以上の温度で焼成してポリテトラフルオロエチレン成
形体を作製する。より詳しく説明すると、上記のような
ＰＴＦＥ予備成形体は、テトラフルオロエチレンの懸濁
重合により得られたポリテトラフルオロエチレン粉末す
なわち成形用粉末（モールディングパウダー）を金型中
などで成形圧１００〜３００Kg／cm2 で成形することに
よって得ることができる。次いで、この予備成形体を未
焼成ポリテトラフルオロエチレン粉末の融点以上好まし
くは３５０〜３８０℃の温度で焼成した後冷却すること
によりＰＴＦＥ成形体が得られる。ここでポリテトラフ
ルオロエチレンの融点は、懸濁重合法により得られたポ
リテトラフルオロエチレン粉末を示差走査熱量計（ＤＳ
Ｃ）により分析し、このＤＳＣチャートのピークの立上
り温度を融点とすることにより決定される。[0012] Such a PTFE molding powder is compression-molded to form a preform, and the preform is fired at a temperature equal to or higher than the melting point to produce a polytetrafluoroethylene molded body. More specifically, the PTFE preform as described above is obtained by molding a polytetrafluoroethylene powder obtained by suspension polymerization of tetrafluoroethylene, that is, a molding powder (molding powder) in a mold or the like at a molding pressure of 100 to 300 kg. / Cm 2 . Next, the preformed body is fired at a temperature equal to or higher than the melting point of the unfired polytetrafluoroethylene powder, preferably at a temperature of 350 to 380 ° C, and then cooled to obtain a PTFE shaped body. Here, the melting point of polytetrafluoroethylene is determined by measuring the polytetrafluoroethylene powder obtained by the suspension polymerization method with a differential scanning calorimeter (DS).
C), and is determined by using the rising temperature of the peak of this DSC chart as the melting point.

【００１３】このＰＴＦＥ成形体は、通常ブロック状
（円筒状）である。このブロック状のＰＴＦＥ成形体か
らテープを作成するには、ブロック状成形体を切削機な
どにより厚さ０．０１〜２．０mm好ましくは０．０２〜
０．２mm程度に切削すればよい。このようにして得られ
るＰＴＦＥテープの膜厚は、特に限定されない。 本発
明では、このようにして得られた少なくとも２枚のＰＴ
ＦＥ製テープを原反として用いる。This PTFE molded product is usually in a block shape (cylindrical shape). In order to prepare a tape from the block-shaped PTFE molded body, the block-shaped molded body is formed with a cutting machine or the like to a thickness of 0.01 to 2.0 mm, preferably 0.02 to 2.0 mm.
What is necessary is just to cut to about 0.2 mm. The thickness of the PTFE tape thus obtained is not particularly limited. In the present invention, at least two PTs thus obtained
An FE tape is used as a raw material.

【００１４】なおブロック状のＰＴＦＥ成形体を切削以
外の方法によって成形して得られたＰＴＦＥ製テープを
用いることもできる。また本発明では、テトラフルオロ
エチレンの乳化重合によって得られたＰＴＦＥファイン
パウダーに液状潤滑剤を配合して圧縮予備成形し、次い
で押出しまたは圧延あるいはこの両者を含む方法によっ
てテープ状とした後、液状潤滑剤を除去し、加熱焼成す
ることによって得られたテープを原反として用いること
もできる。[0014] A PTFE tape obtained by molding a block-shaped PTFE molded body by a method other than cutting can also be used. Further, in the present invention, a liquid lubricant is blended with PTFE fine powder obtained by emulsion polymerization of tetrafluoroethylene, compression preformed, and then extruded or rolled or formed into a tape by a method including both, and then a liquid lubricant is formed. A tape obtained by removing the agent and baking by heating can be used as a raw material.

【００１５】次に、本発明では上記のように得られた少
なくとも２枚のＰＴＦＥ製テープを、図１に示すように
して加熱融着して一体化する。すなわち、０．０１〜
２．０mm好ましくは０．０２〜０．２mm程度の厚さを有
する少なくとも２枚のＰＴＦＥ製テープ１ａ，１ｂを、
テンションコントロール２ａ，２ｂを介して重ね合わ
せ、融点未満の温度好ましくは１００〜３００℃さらに
好ましくは１４０〜２５０℃に加熱して圧着する。Next, in the present invention, at least two PTFE tapes obtained as described above are integrated by heat fusion as shown in FIG. That is, 0.01 to
At least two PTFE tapes 1a and 1b each having a thickness of about 2.0 mm, preferably about 0.02 to 0.2 mm,
The sheets are superposed via the tension controls 2a and 2b, and are heated to a temperature lower than the melting point, preferably 100 to 300 ° C, more preferably 140 to 250 ° C, and pressed.

【００１６】加熱圧着されるＰＴＦＥ製テープは、２枚
であっても、３枚以上であってもよい。少なくとも２枚
のＰＴＦＥ製テープを融点以下の温度に加熱するには、
ロール３，４，５を加熱するなどして予熱ゾーンとして
おくことが望ましい。The number of PTFE tapes to be heat-pressed may be two or three or more. To heat at least two PTFE tapes to a temperature below the melting point,
It is desirable to set the preheating zone by heating the rolls 3, 4, and 5.

【００１７】また、少なくとも２枚のＰＴＦＥ製テープ
の圧着は、たとえば一対圧延ロール６ａ，６ｂに、少な
くとも２枚のＰＴＦＥ製テープを通過させることにより
行なうことができる。この際少なくとも２枚のＰＴＦＥ
製テープの合計の厚みをＴ1 mmとし、圧延ロールを通過
して加熱圧着されたＰＴＦＥ製テープ圧着体の厚みをＴ
2 mmとしたとき、Ｔ2 ／Ｔ1 が０．３〜０．９好ましく
は０．５〜０．９となるように、少なくとも２枚のＰＴ
ＦＥ製テープを圧延して圧着することが望ましい。The pressure bonding of at least two PTFE tapes can be performed, for example, by passing at least two PTFE tapes through a pair of rolling rolls 6a and 6b. At this time, at least two sheets of PTFE
The total thickness of the tape made of PTFE is defined as T 1 mm, and the thickness of the PTFE tape-compressed body that has been passed through the rolling roll and heat-compressed is T.
At least two PTs are set so that T 2 / T 1 is 0.3 to 0.9, preferably 0.5 to 0.9 when the thickness is 2 mm.
It is desirable that the FE tape be rolled and pressed.

【００１８】少なくとも２枚のＰＴＦＥ製テープを、上
記のようにして圧着すると、ＰＴＦＥテープ間に空気な
どが入らず、均一な厚みを有するＰＴＦＥテープ圧着体
が得られる。When at least two PTFE tapes are press-bonded as described above, air or the like does not enter between the PTFE tapes, and a PTFE tape-pressed body having a uniform thickness can be obtained.

【００１９】上記のようにして得られたＰＴＦＥ製テー
プ圧着体は、次いで水冷ロール７などによって冷却され
ることが望ましい。次にこのＰＴＦＥ製テープ圧着体
を、加熱ゾーン８に通過させるなどしてＰＴＦＥの融点
以上好ましくは３２７℃以上さらに好ましくは３５０〜
４００℃に加熱して、圧着されたＰＴＦＥ製テープを溶
融一体化する。加熱時間は、加熱温度によって大きく変
化するが、一般に１０秒〜３０分程度である。The PTFE tape-compressed body obtained as described above is desirably cooled by a water-cooled roll 7 or the like. Next, the PTFE tape pressure-bonded body is passed through the heating zone 8 or the like, for example, at a temperature higher than the melting point of PTFE, preferably 327 ° C. or higher, and more preferably 350 to 350 ° C.
The mixture is heated to 400 ° C. and the pressure-bonded PTFE tape is melted and integrated. The heating time varies greatly depending on the heating temperature, but is generally about 10 seconds to 30 minutes.

【００２０】上記のようにしてＰＴＦＥ製テープ圧着体
を加熱溶融一体化する際に、テンションコントローラな
どによって該ＰＴＦＥ製テープ圧着体にテンションをか
けてもよい。When the PTFE tape crimped body is integrated by heating and melting as described above, tension may be applied to the PTFE tape crimped body by a tension controller or the like.

【００２１】ＰＴＦＥ製テープ圧着体を加熱溶融一体化
してＰＴＦＥ製テープを製造した後、得られたＰＴＦＥ
製テープを１４０〜３２０℃好ましくは２００〜３００
℃の温度に保ってヒートセットすることが好ましい。こ
のようにしてＰＴＦＥ製テープを加熱溶融一体化した後
ヒートセットすると、寸法安定性などに優れたＰＴＦＥ
テープが得られる。A PTFE tape is manufactured by heating and melting and integrating the PTFE tape-compressed body to obtain a PTFE tape.
140-320 ° C, preferably 200-300
It is preferable to heat-set while maintaining the temperature of ° C. When the PTFE tape is heat-melted and integrated after heat-setting as described above, PTFE having excellent dimensional stability and the like is obtained.
A tape is obtained.

【００２２】なお、本発明では少なくとも２枚のＰＴＦ
Ｅ製テープを融点未満の温度に加熱して圧着し、得られ
たＰＴＦＥ製テープ圧着体をＰＴＦＥの融点以上に加熱
して一体化しているが、本発明に係るＰＴＦＥ製テープ
を電線などに被覆して用いる場合には、ＰＴＦＥ製テー
プ圧着体を電線などに被覆した後に、ＰＴＦＥの融点以
上に加熱して融着一体化してもよい。In the present invention, at least two PTFs
The tape made of E is heated to a temperature lower than the melting point and pressed, and the obtained pressure-bonded PTFE tape is heated to a temperature higher than the melting point of PTFE and integrated, but the PTFE tape according to the present invention is coated on electric wires and the like. When used, the PTFE tape crimped body may be coated on an electric wire or the like, and then heated to a temperature equal to or higher than the melting point of PTFE and fused and integrated.

【００２３】本発明では、上記のように少なくとも２枚
のＰＴＦＥ製テープを融点未満の温度に加熱して圧着
し、得られたＰＴＦＥテープ圧着体をＰＴＦＥの融点以
上に加熱して一体化しているので、たとえ一方のＰＴＦ
Ｅ製テープに切削傷、ピンホールあるいはボイドなどが
存在しても、他方のＰＴＦＥ製テープがその欠陥をカバ
ーし、一体化されたＰＴＦＥ製テープには、切削傷、ピ
ンホールあるいはボイドなどがなくなり、絶縁破壊強度
などに優れたＰＴＦＥ製テープが得られる。In the present invention, as described above, at least two PTFE tapes are heated to a temperature lower than the melting point and pressure-bonded, and the obtained PTFE tape-pressed body is heated to a temperature equal to or higher than the melting point of PTFE and integrated. So even if one PTF
Even if there is a cut, pinhole or void in the E tape, the other PTFE tape covers the defect, and the integrated PTFE tape has no cut, pinhole or void. Thus, a PTFE tape having excellent dielectric breakdown strength and the like can be obtained.

【００２４】たとえば本発明により得られたＰＴＦＥ製
テープは８０μｍの厚みであっても絶縁破壊強度は平均
１４．２ＫＶであるが、一方従来公知で得られたＰＴＦ
Ｅ製テープは８０μｍの厚みであっても絶縁破壊強度は
平均１３．４ＫＶであった。このように本発明によれ
ば、厚みが薄くても、高い絶縁破壊強度が得られる。し
かも得られるＰＴＦＥ製テープは、絶縁破壊強度にばら
つきがなく、品質の安定性に優れている。なお絶縁破壊
強度のばらつきは、絶縁破壊強度に関する分散値によっ
て評価される。For example, the PTFE tape obtained according to the present invention has an average dielectric breakdown strength of 14.2 KV even if it has a thickness of 80 μm.
Even when the tape made of E had a thickness of 80 μm, the dielectric breakdown strength was 13.4 KV on average. Thus, according to the present invention, a high dielectric strength can be obtained even if the thickness is small. Moreover, the obtained PTFE tape has no variation in dielectric breakdown strength and is excellent in quality stability. Note that the variation in the dielectric breakdown strength is evaluated by a variance value regarding the dielectric breakdown strength.

【００２５】[0025]

【発明の効果】本発明によれば、傷、ピンホールあるい
はボイドなどがなく、絶縁破壊強度に優れ、しかも品質
の安定したＰＴＦＥ製テープが得られる。According to the present invention, it is possible to obtain a PTFE tape which is free from scratches, pinholes or voids, has excellent dielectric breakdown strength, and is stable in quality.

【００２６】以下本発明を実施例により説明するが、本
発明はこれら実施例に限定されるものではない。Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to these examples.

【００２７】[0027]

【実施例１】懸濁重合法により得られた平均粒子径２４
μｍのＰＴＦＥ成形用粉末（ポリフロン M-12 ダイキ
ン工業（株）社製）を金型中で１７５kg／cm2 ）の成形
圧で成形した後、３６５℃で焼成してブロック状のＰＴ
ＦＥ成形体を得た。Example 1 Average particle size 24 obtained by suspension polymerization method
μm PTFE molding powder (Polyflon M-12, manufactured by Daikin Industries, Ltd.) is molded in a mold at a molding pressure of 175 kg / cm 2 , and then fired at 365 ° C. to form a block-shaped PT.
An FE molded product was obtained.

【００２８】得られたブロック状の成形体を切削して、
厚さ４２μｍのフィルム状のＰＴＦＥ成形体（１）を作
製した。次いで得られたフィルム状ＰＴＦＥ成形体
（１）を２枚重ね合わせ、１６０℃の温度に加熱しなが
ら圧着し、厚さ６０μｍのポリテトラフルオロエチレン
製フィルム圧着体を得た。得られたポリテトラフルオロ
エチレン製フィルム圧着体を３５０℃で１時間加熱し、
融着一体化されたポリテトラフルオロエチレン製テープ
を得た。このポリテトラフルオロエチレン製テープの厚
みは８０μｍであった。この際の冷却速度は１５℃／分
であった。Cutting the obtained block-shaped molded body,
A film-shaped PTFE molded article (1) having a thickness of 42 μm was produced. Next, two of the obtained film-shaped PTFE molded articles (1) were overlaid and pressed together while heating to a temperature of 160 ° C. to obtain a 60 μm-thick polytetrafluoroethylene film-pressed body. The obtained polytetrafluoroethylene film crimped body was heated at 350 ° C. for 1 hour,
A fused polytetrafluoroethylene tape was obtained. The thickness of this polytetrafluoroethylene tape was 80 μm. The cooling rate at this time was 15 ° C./min.

【００２９】上記のようにして得られたポリテトラフル
オロエチレン製テープの絶縁破壊強度を測定した。測定
データ数は１００個で、最大値、最小値、平均値、分散
を求めた。最大値は１５．２ＫＶ、最小値は１３．０Ｋ
Ｖ、平均値は１４．２ＫＶ、分散は０．１８４であっ
た。The dielectric breakdown strength of the polytetrafluoroethylene tape obtained as described above was measured. The number of measurement data was 100, and the maximum value, minimum value, average value, and variance were obtained. The maximum value is 15.2KV, the minimum value is 13.0K
V, the average value was 14.2 KV, and the variance was 0.184.

【００３０】[0030]

【比較例１】実施例１において、得られたブロック状の
ＰＴＦＥ成形体を８０μｍの厚みに切削し、３５０℃で
１時間加熱し、１５℃／分で冷却して、ＰＴＦＥ製テー
プを作製した。[Comparative Example 1] In Example 1, the obtained block-shaped PTFE molded article was cut into a thickness of 80 µm, heated at 350 ° C for 1 hour, and cooled at 15 ° C / min to produce a PTFE tape. .

【００３１】このようにして得られたポリテトラフルオ
ロエチレン製テープの絶縁破壊強度の測定結果は、最大
値が１４．７ＫＶ、最小値が１０．７ＫＶ、平均値が１
３．４ＫＶ、分散が０．５４３であった。The measurement results of the dielectric breakdown strength of the polytetrafluoroethylene tape thus obtained show that the maximum value is 14.7 KV, the minimum value is 10.7 KV, and the average value is 1
3.4 KV, dispersion was 0.543.

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

【図１】 本発明に係るポリテトラフルオロエチレン製
テープの製造工程を示す図である。FIG. 1 is a view showing a process for producing a polytetrafluoroethylene tape according to the present invention.

【符号の説明】[Explanation of symbols]

１ａ，１ｂ…原反ＰＴＦＥ製テープ ６ａ，６ｂ…圧延ロール ８…加熱ゾーン 1a, 1b: Raw PTFE tape 6a, 6b: Roll roll 8: Heating zone

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 63/00 - 65/82 B29D 7/01 C08J 5/18 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) B29C 63/00-65/82 B29D 7/01 C08J 5/18

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 少なくとも２枚のポリテトラフルオロエ
チレン製テープを融点未満の温度に加熱して圧着し、 次いで得られたポリテトラフルオロエチレン製テープ圧
着体をポリテトラフルオロエチレンの融点以上に加熱し
て一体化することを特徴とするポリテトラフルオロエチ
レン製テープの製造方法。At least two polytetrafluoroethylene tapes are heated to a temperature lower than the melting point and pressed, and the obtained polytetrafluoroethylene tape-pressed body is heated to a temperature equal to or higher than the melting point of the polytetrafluoroethylene. And producing a tape made of polytetrafluoroethylene. 【請求項２】 少なくとも２枚のポリテトラフルオロエ
チレン製テープを加熱圧着してポリテトラフルオロエチ
レン製テープ圧着体を作成する際の加熱温度が１００〜
３００℃である請求項１に記載のポリテトラフルオロエ
チレン製テープの製造方法。2. A heating temperature of at least 100 to form a polytetrafluoroethylene tape-compressed body by thermocompression bonding at least two polytetrafluoroethylene tapes.
The method for producing a polytetrafluoroethylene tape according to claim 1, wherein the temperature is 300 ° C.
JP31798891A 1991-12-02 1991-12-02 Method for producing polytetrafluoroethylene tape Expired - Fee Related JP3241771B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31798891A JP3241771B2 (en) 1991-12-02 1991-12-02 Method for producing polytetrafluoroethylene tape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31798891A JP3241771B2 (en) 1991-12-02 1991-12-02 Method for producing polytetrafluoroethylene tape

Publications (2)

Publication Number Publication Date
JPH05147108A JPH05147108A (en) 1993-06-15
JP3241771B2 true JP3241771B2 (en) 2001-12-25

Family

ID=18094234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31798891A Expired - Fee Related JP3241771B2 (en) 1991-12-02 1991-12-02 Method for producing polytetrafluoroethylene tape

Country Status (1)

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