GB1442277A - Polystyrene electrets - Google Patents

Polystyrene electrets

Info

Publication number
GB1442277A
GB1442277A GB2063974A GB2063974A GB1442277A GB 1442277 A GB1442277 A GB 1442277A GB 2063974 A GB2063974 A GB 2063974A GB 2063974 A GB2063974 A GB 2063974A GB 1442277 A GB1442277 A GB 1442277A
Authority
GB
United Kingdom
Prior art keywords
electret
styrene
copolymer
polystyrene
layers
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
GB2063974A
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 GB1442277A publication Critical patent/GB1442277A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2325/00—Polymers of vinyl-aromatic compounds, e.g. polystyrene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment

Abstract

1442277 Laminated plastics electrets KUREHA KAGAKU KOGYO KK 9 May 1974 [9 May 1973] 20639/74 Heading B5N [Also in Division H1] A sandwich structure for forming into an electret comprises two outer layers of polystyrene and an intermediate layer comprising either a copolymer of styrene containing 5 to 95% by weight of styrene monomer units or a composition containing polystyrene and/or a styrene copolymer, styrene monomer units constituting 10 to 95% by weight of the composition. The sandwich is manufactured by hot-pressing or supersonically welding the layers or by superposing the layers and using the heat generated during polarization to form an electret, and is formed into an electret by known methods. The outer layers provide the electret properties; the middle layer provides high impact resistances the styrene content enhancing adhesion to the outer layers. Many examples of comonomers or additional polymers in the middle layer are given, and the copolymer may be a block or graft polymer.
GB2063974A 1973-05-09 1974-05-09 Polystyrene electrets Expired GB1442277A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5065073A JPS5526611B2 (en) 1973-05-09 1973-05-09

Publications (1)

Publication Number Publication Date
GB1442277A true GB1442277A (en) 1976-07-14

Family

ID=12864802

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2063974A Expired GB1442277A (en) 1973-05-09 1974-05-09 Polystyrene electrets

Country Status (2)

Country Link
JP (1) JPS5526611B2 (en)
GB (1) GB1442277A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2371758A1 (en) * 1976-11-22 1978-06-16 Uniroyal Ltd STYRENE TYPE POLYMER ELECTRETS
FR2445223A1 (en) * 1978-12-27 1980-07-25 Asahi Chemical Ind MULTILAYER LAMINATE PRODUCT
EP0251636A2 (en) * 1986-06-23 1988-01-07 Dainippon Ink And Chemicals, Inc. Biaxially stretched composite styrene resin sheet
FR2730853A1 (en) * 1995-02-17 1996-08-23 Inst Franco Allemand De Rech D PROCESS FOR POLARIZING A SHEET OF LARGE SURFACE FERROELECTRIC MATERIAL

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51143298A (en) * 1975-04-28 1976-12-09 Komatsu Ltd Scraping device from wall surface
JPS5810780Y2 (en) * 1977-08-10 1983-02-28 山九株式会社 Scraping device for "loose" storage tank
JPS5617676A (en) * 1979-07-25 1981-02-19 Takaaki Tsunetsugu Washing service car for high ground
JPS5624987U (en) * 1979-08-01 1981-03-06
JP2608700B2 (en) * 1985-07-09 1997-05-07 株式会社 アイチコーポレーション Wall work method
US5610455A (en) * 1995-06-29 1997-03-11 Minnesota Mining And Manufacturing Company Electret containing syndiotactic vinyl aromatic polymer
CN109950045B (en) * 2019-03-19 2020-08-14 西安交通大学 Flexoelectric electret with adjustable and controllable flexoelectric effect and preparation method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2371758A1 (en) * 1976-11-22 1978-06-16 Uniroyal Ltd STYRENE TYPE POLYMER ELECTRETS
FR2445223A1 (en) * 1978-12-27 1980-07-25 Asahi Chemical Ind MULTILAYER LAMINATE PRODUCT
EP0251636A2 (en) * 1986-06-23 1988-01-07 Dainippon Ink And Chemicals, Inc. Biaxially stretched composite styrene resin sheet
EP0251636A3 (en) * 1986-06-23 1988-11-02 Dainippon Ink And Chemicals, Inc. Biaxially stretched composite styrene resin sheet
US4835041A (en) * 1986-06-23 1989-05-30 Dainippon Ink & Chemicals, Inc. Biaxially stretched composite styrene resin sheet
FR2730853A1 (en) * 1995-02-17 1996-08-23 Inst Franco Allemand De Rech D PROCESS FOR POLARIZING A SHEET OF LARGE SURFACE FERROELECTRIC MATERIAL
US5700359A (en) * 1995-02-17 1997-12-23 Institut Franco Allemand De Recherches De Saint-Louis Method of polarizing at least one large area sheet of ferroelectric material

Also Published As

Publication number Publication date
JPS50400A (en) 1975-01-06
JPS5526611B2 (en) 1980-07-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee