GB926892A - Improvements in or relating to methods of making films and films made by such methods - Google Patents

Improvements in or relating to methods of making films and films made by such methods

Info

Publication number
GB926892A
GB926892A GB1837361A GB1837361A GB926892A GB 926892 A GB926892 A GB 926892A GB 1837361 A GB1837361 A GB 1837361A GB 1837361 A GB1837361 A GB 1837361A GB 926892 A GB926892 A GB 926892A
Authority
GB
United Kingdom
Prior art keywords
adhesive
support
molecular weight
coated
solution
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
GB1837361A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB926892A publication Critical patent/GB926892A/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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Laminated Bodies (AREA)

Abstract

A thin film of a non-adhesive organic polymeric electrical insulating material is made by coating a solution of the material on a surface of a flexible support on to which a thin coating of a high molecular weight organic polymeric adhesive has previously been deposited, and the dried coating subsequently removed from the support. Specified insulating materials include cellulose acetate, ethyl cellulose, benzyl cellulose, polystyrene, polyethylene, polytetrafluoroethylene and polyethylene terephthalate, which are cast from solution in volatile organic p solvents, e.g. cellulose acetate from acetone. The adhesive should be thermally stable, have a low vapour pressure, and dielectric properties similar to those of the insulating material. A suitable adhesive comprises at least one polymerized hydrocarbon or polymerized vinyl ether or a mixture thereof, e.g. polyisobutylene or polybutylene having a molecular weight of approximately 5,000, or polyvinylisobutyl ether. Desirably, the flexible support is first coated with a non-adhesive hydrocarbon having a melting point of at least 60 DEG C., on to which the adhesive is deposited. The hard wax formed in the Fischer-Tropsch process, consisting of high molecular weight aliphatic hydrocarbons, partly branched, and melting at 105 DEG -110 DEG C., may be utilised as a non-adhesive hydrocarbon. Films so made are desirably not more than 6m thick, and may be metallized, e.g. with aluminium, by vapour-deposition under vacuum, for use as capacitor dielectrics. In an example, a flexible support of paper or synthetic plastic material is impregnated or coated with the hard wax mentioned previously, and is then further coated with a benzene solution of polyisobutylene of molecular weight 5,000. The adhesive layer is dried and the treated support is then coated with a solution of cellulose acetate in a volatile solvent, and the support heated to evaporate the solvent. Metallization of the film may be effected before removal of the film from the support.
GB1837361A 1960-05-23 1961-05-19 Improvements in or relating to methods of making films and films made by such methods Expired GB926892A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1960S0068631 DE1294554B (en) 1960-05-23 1960-05-23 Process to improve the adhesive strength of thin insulating foils that are painted or laminated onto a carrier foil

Publications (1)

Publication Number Publication Date
GB926892A true GB926892A (en) 1963-05-22

Family

ID=7500430

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1837361A Expired GB926892A (en) 1960-05-23 1961-05-19 Improvements in or relating to methods of making films and films made by such methods

Country Status (2)

Country Link
DE (1) DE1294554B (en)
GB (1) GB926892A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754230A (en) * 1952-10-25 1956-07-10 Bell Telephone Labor Inc Method of making electrical capacitors

Also Published As

Publication number Publication date
DE1294554B (en) 1969-05-08

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