GB1349860A - Manufacture of shaped piezoelectric articles - Google Patents

Manufacture of shaped piezoelectric articles

Info

Publication number
GB1349860A
GB1349860A GB5609371A GB5609371A GB1349860A GB 1349860 A GB1349860 A GB 1349860A GB 5609371 A GB5609371 A GB 5609371A GB 5609371 A GB5609371 A GB 5609371A GB 1349860 A GB1349860 A GB 1349860A
Authority
GB
United Kingdom
Prior art keywords
film
copolymer
treatment
weight
piezoelectric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5609371A
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.)
Kureha Corp
Original Assignee
Kureha Corp
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 Kureha Corp filed Critical Kureha Corp
Publication of GB1349860A publication Critical patent/GB1349860A/en
Expired 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
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/0081—After-treatment of articles without altering their shape; Apparatus therefor using an electric field, e.g. for electrostatic charging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
    • H01G7/021—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric
    • H01G7/023—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric of macromolecular compounds
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/01—Manufacture or treatment
    • H10N30/04—Treatments to modify a piezoelectric or electrostrictive property, e.g. polarisation characteristics, vibration characteristics or mode tuning
    • H10N30/045—Treatments to modify a piezoelectric or electrostrictive property, e.g. polarisation characteristics, vibration characteristics or mode tuning by polarising
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/01—Manufacture or treatment
    • H10N30/09—Forming piezoelectric or electrostrictive materials
    • H10N30/098—Forming organic materials
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/85—Piezoelectric or electrostrictive active materials
    • H10N30/857—Macromolecular compositions
    • 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
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/02—Thermal after-treatment
    • 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
    • B29K2027/16—PVDF, i.e. polyvinylidene fluoride
    • 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
    • B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0085—Copolymers
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Organic Insulating Materials (AREA)
  • Formation Of Insulating Films (AREA)

Abstract

1349860 Piezoelectric films KUREHA KAGAKU KOGYO KK 2 Dec 1971 [2 Dec 1970] 56093/71 Heading B5B [Also in Division H1] Piezoelectric elements or shaped structures are made by subjecting an element or shaped structure, especially a film, formed of a copolymer of 99 to 50% by weight of vinylidene fluoride and 1 to 50% by weight of a copolymerizable ethylenically unsaturated monomer, to a treatment at a temperature between 40‹ and 200‹ C. in a D.C. electric field having a potential gradient from 30 kv./cm. to 1500 kv./cm. for a period sufficient to allow dielectric polarization of the copolymer. Preferably, the treatment temperature is between 40‹ C. and the melting point of the copolymer, at a potential gradient of from 100 kv./cm. to 1500 kv./cm., for a period of at least two hours. Specified comonomers include tetrafluoroethylene, trifluoroethylene, trifluoromonochloroethylene, vinyl fluoride and hexafluoropropylene. The element or shaped structure may be a mono- or biaxially stretched film, or may be a coated film on a substrate, or a sheet, block or rod. In Example 1, a vinylidene fluriride-tetr fluoroethylene copolymer powder is moulded at 200‹ C. in a press to form a film which is polarized by treatment between stainless steel electrodes. Example 2 is similar, but the film is stretched before the electrical treatment. In Example 10, the copolymer is dissolved in acetone and the solution cast on an aluminium plate to form a coating of 10 microns thickness. After drying, gold is deposited thereon by vacuum-metallization. Figure 2 shows an apparatus for measuring the voltage generated on applying pressure to the piezoelectric film. The film is interposed between a pair of 1 cm. square electrodes 2, and a weight 3 of 1 kg. is applied. The voltage generated is determined by means of oscillograph 5 through a circuit 4 having a field effect transistor. As the degree of dielectric polarization in the film varies, depending on the stress imposed thereon the film can be formed into a pressuresensitive element to obtain a signal corresponding to a stress.
GB5609371A 1970-12-02 1971-12-02 Manufacture of shaped piezoelectric articles Expired GB1349860A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45106022A JPS5029159B1 (en) 1970-12-02 1970-12-02

Publications (1)

Publication Number Publication Date
GB1349860A true GB1349860A (en) 1974-04-10

Family

ID=14423006

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5609371A Expired GB1349860A (en) 1970-12-02 1971-12-02 Manufacture of shaped piezoelectric articles

Country Status (5)

Country Link
JP (1) JPS5029159B1 (en)
CA (1) CA991585A (en)
FR (1) FR2117315A5 (en)
GB (1) GB1349860A (en)
NL (1) NL165769C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084736B1 (en) * 1982-01-21 1987-09-09 Minnesota Mining And Manufacturing Company Optical fibers having piezoelectric coatings
WO2007029275A1 (en) * 2005-09-05 2007-03-15 Federico Carpi Electroactive polymer based actuator, sensor and generator with folded configuration
US10245640B2 (en) 2013-03-28 2019-04-02 Genicore Spolka Z Ograniczona Odpowiedzialnoscia Device and a method for consolidation of powder materials
CN115322499A (en) * 2022-08-19 2022-11-11 三三智能科技(日照)有限公司 Piezoelectric film production process capable of reducing breakage rate

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5199572A (en) * 1975-01-22 1976-09-02 Minnesota Mining & Mfg
GB1544856A (en) * 1976-12-09 1979-04-25 Marconi Co Ltd Pressure sensitive detectors
US4234868A (en) * 1978-10-06 1980-11-18 Pennwalt Corporation Personal verification device
FR2446045A1 (en) * 1979-01-04 1980-08-01 Thomson Csf PIEZOELECTRIC TRANSDUCER WITH POLYMER ELEMENT AND MANUFACTURING METHOD THEREOF
FR2458909B1 (en) * 1979-06-13 1982-12-31 Thomson Csf
FR2465320A1 (en) * 1979-09-14 1981-03-20 Thomson Csf PIEZOELECTRIC COMPOSITE MATERIAL FILM AND METHOD FOR MANUFACTURING THE SAME
DE3166101D1 (en) * 1980-02-07 1984-10-25 Toray Industries Piezoelectric polymer material, process for producing the same and an ultrasonic transducer utilizing the same
JPS58209007A (en) * 1982-05-28 1983-12-05 呉羽化学工業株式会社 Orientation pole for vinylidene fluoride copolymer mold

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084736B1 (en) * 1982-01-21 1987-09-09 Minnesota Mining And Manufacturing Company Optical fibers having piezoelectric coatings
WO2007029275A1 (en) * 2005-09-05 2007-03-15 Federico Carpi Electroactive polymer based actuator, sensor and generator with folded configuration
US10245640B2 (en) 2013-03-28 2019-04-02 Genicore Spolka Z Ograniczona Odpowiedzialnoscia Device and a method for consolidation of powder materials
CN115322499A (en) * 2022-08-19 2022-11-11 三三智能科技(日照)有限公司 Piezoelectric film production process capable of reducing breakage rate

Also Published As

Publication number Publication date
NL165769C (en) 1981-05-15
FR2117315A5 (en) 1972-07-21
NL7116573A (en) 1972-06-06
DE2159861B2 (en) 1976-04-08
DE2159861A1 (en) 1972-06-08
CA991585A (en) 1976-06-22
JPS5029159B1 (en) 1975-09-20
NL165769B (en) 1980-12-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years