JPH02230686A - 高周波誘電加熱方法 - Google Patents

高周波誘電加熱方法

Info

Publication number
JPH02230686A
JPH02230686A JP1050671A JP5067189A JPH02230686A JP H02230686 A JPH02230686 A JP H02230686A JP 1050671 A JP1050671 A JP 1050671A JP 5067189 A JP5067189 A JP 5067189A JP H02230686 A JPH02230686 A JP H02230686A
Authority
JP
Japan
Prior art keywords
filler
high frequency
powder
electric field
dielectric constant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1050671A
Other languages
English (en)
Inventor
Yamahito Ninomiya
二宮　山人
Teruhisa Yotsuya
四谷　輝久
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.)
Fuji Polymer Industries Co Ltd
Original Assignee
Fuji Polymer Industries Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Polymer Industries Co Ltd filed Critical Fuji Polymer Industries Co Ltd
Priority to JP1050671A priority Critical patent/JPH02230686A/ja
Publication of JPH02230686A publication Critical patent/JPH02230686A/ja
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • 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
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces 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
    • B29C66/01—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
    • 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
    • B29C66/70—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 〔産業上の利，用分野〕 本発明は非有極性プラスチックを高周波電界内で効率よ
く加熱する方法に関する。
本発明による加熱方法は、溶融接着、プラスチック成形
、ラジカル触媒を用いる不飽和ポリエステル樹脂の加熱
硬化などに利用することができる，〔従来技術〕 高周波電界内で発熱ずるブラスチンクとしては、有極性
プラスチックであるポリ塩化ビニル、ポリ塩化，ビニリ
デン、ポリウレタン、ナイロン、ニトリルゴム、フェノ
ール樹脂等が知られているが、その他のほとんどのプラ
スチックは高周波電界内で実用的な発熱を示さない。そ
のため非有極性プラスチソクに、第四級アンモニウム塩
、２−オキサゾリジノン化合物、ジエチレングリコール
、エタノールアミン、カーボンプランク、チタン酸バリ
ウム、酸化亜鉛、ベントナイト粘土等の使用が検討され
ているが、その効果はまだ不十分である（特開昭６１　
−　２２８０２７号公報、特開昭６１　−　１３６５７
４号公報、高周波の工業への応用（東京電気大学出版）
、特開昭６１　−　１７１７８３号公報および特開昭６
１−２１１３５１号公報を参照）． 〔発明が解決しようとする課題〕 上記の如く、非有極性プラスチノクに充填剤を添加し高
周波電界内で発熱させる方法について種々検討されてい
るが、実用的な発熱を示す充填剤についてはまだ知られ
ていない． 本発明者らは非有極性ブラスチソクを高周波電界内で効
率よ《加熱させる方法について鋭，意研究した結果、本
発明に至ったものである。
〔！！！！題を解決するための手段〕
本発明は高周波誘電加熱方法において、比誘電率が１０
以下、誘電川係数が０．０５以上の充填剤を非有極性プ
ラスチックに１０〜３０体積％添加して、高周波電界を
印加することを特＋ａとする。
本発明における非有極性プラスチックとしては、ポリエ
チレン、ボリプロビレン、四フッ化ポリエチレン、ポリ
エチレンテレフタレート等が挙げられる。
比誘電率が１０以下、誘電撰係数が０．０５以上の充填
剤としては、ナイロン粉末、ニトリルゴム粉末、フェノ
ール樹脂粉末、木粉、低比誘電率でかつ高誘電川係数を
有する物質を吸着させた粉末、例えば３−ｎブチルー２
−オキサヅリジノンを吸着させたシリカ粉末等を挙げる
ことができる．充填剤の添加量は、少ないと見掛けの発
熱量が低下するため加熱に長時間を要し、また多いとプ
ラスチックの物性低下を招くため、１０〜３０体禎％が
望ましい。
本発明では通常の高周波誘電加熱装置を用いることがで
き、また周波数は特に限定されるものではないが、工業
用割当の２７．１ＭＨｚまたは４０．６８Ｍ｝Ｉ．ｚが
好ましく用いられる。
〔作用〕
誘電物質等の高周波電界内での発熱は、式（１）によっ
て表わされる． Ｗｏ　＝　５／９ｆＥ”　ｔ　ｒｔａｎδｘ１０−”　
（Ｗ／ｒｒｆ　・ｓｅｅ）　＝ｉｌ）ｆ：周波数［Ｈｅ
ｒδ］ Ｅ＝電界　（Ｖ／ｍ） εｒ：非誘電率 ｔａｎδ：誘電損係数 式（１）より誘電物質等の高周波電界内での発熱は、ｆ
，Ｅが一定の時はε１　Ｘ　ｔａｎδが高いことが望ま
しい。一般にはεｒＸｔａｎδが０．０１〜０．１以上
のものが使用されている。
一方非有極性プラスチンクに充填剤を分散させた場合に
は、充填剤の添加量が少なければ個々の粒子の発熱は、
充填剤が丸ｔ！！状の場合の式（２）が適用できると考
えられる（高周波の工業への応用、高橋勘次郎他、東京
電気大学出版）。
ここで非有掻性ブラスチ・ンクの比誘電率はεｒｌｓ充
填剤の比誘電率はεｒ，、誘電損係数はｔａｎ６Ｂおよ
び発熱量はＷ２である． 弐（２）は次のように変形される． ソ ４　６　ｒｌ　　εｒｉ ｇｏ’″（ｇｒ＋＋ｊｒｔ）・ ここにｇｏの最大値（ｇｏ）ｏｉａｘｅｒｘ−εｒ，、
（　ｇ　ｏ　）ｍａｘ−　１で、かつｇｏ≦１となる，
従って充填剤の発熱量Ｗ！を大きくするためＣこは、ε
ｒ！一εｒ，でかつｔａｎδ２が大きいことが望ましい
．すなわち低比誘電率でかつ高銹電損保敗の充填剤を添
加する必要があり、実用的な発熱を得るためには比誘電
率は１０以下、誘電損係数は０．０５以上が望ましい． 以下に実施例を示して本発明を説明する．実施例 ポリエチレンベレットに、比誘電率３．３、誘電損係数
０．１のナイロン６．６繊維の微裁断粉末を２０体積％
添加して、５０μのフィルムを作成した． このフィルムを２枚の１００μのポリエチレンフィルム
間に挿入し、２　７．　１　Ｍ　Ｉ｛ｚの６Ｋ一の高周
波発生装置（富士電波■製、ＦＤＹ−６２０）を用いて
３０秒間高周波を照射したところ、該フィルムは強固に
接着した． 〔発明の効果〕 本発明の高周波銹電加熱方法は、低比誘電率でかつ高誘
電ｔハ係数の充填剤を非有極性プラスチンクに添加する
ことにより、非有極性ブラスチンクを高周波電界内で効
率よ《加熱することができ、種々の用途への適用が期待
される． 特許出願人　　富士高分子株式会社

Claims (1)

    【特許請求の範囲】
  1. 比誘電率が１０以下、誘電損係数が０．０５以上の充填
    剤を非有極性プラスチックに１０〜３０体積％添加して
    、高周波電界を印加することを特徴とする高周波誘電加
    熱方法。
JP1050671A 1989-03-02 1989-03-02 高周波誘電加熱方法 Pending JPH02230686A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1050671A JPH02230686A (ja) 1989-03-02 1989-03-02 高周波誘電加熱方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1050671A JPH02230686A (ja) 1989-03-02 1989-03-02 高周波誘電加熱方法

Publications (1)

Publication Number Publication Date
JPH02230686A true JPH02230686A (ja) 1990-09-13

Family

ID=12865410

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1050671A Pending JPH02230686A (ja) 1989-03-02 1989-03-02 高周波誘電加熱方法

Country Status (1)

Country Link
JP (1) JPH02230686A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0638404A1 (en) * 1993-07-23 1995-02-15 Palboard Ltd. Method and apparatus for producing plastic products

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0638404A1 (en) * 1993-07-23 1995-02-15 Palboard Ltd. Method and apparatus for producing plastic products
US5589260A (en) * 1993-07-23 1996-12-31 Palboard Ltd. Method and apparatus for producing plastic products

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