GB1479590A - Dissipation of electrostatic charges from insulating materials - Google Patents

Dissipation of electrostatic charges from insulating materials

Info

Publication number
GB1479590A
GB1479590A GB51633/73A GB5163373A GB1479590A GB 1479590 A GB1479590 A GB 1479590A GB 51633/73 A GB51633/73 A GB 51633/73A GB 5163373 A GB5163373 A GB 5163373A GB 1479590 A GB1479590 A GB 1479590A
Authority
GB
United Kingdom
Prior art keywords
tube
lubricant
particles
weight
insert
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
GB51633/73A
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.)
SUPERFLEXIT
Superflexit Ltd
Original Assignee
SUPERFLEXIT
Superflexit 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 SUPERFLEXIT, Superflexit Ltd filed Critical SUPERFLEXIT
Priority to GB51633/73A priority Critical patent/GB1479590A/en
Publication of GB1479590A publication Critical patent/GB1479590A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00—Carrying-off electrostatic charges
    • H05F3/02—Carrying-off electrostatic charges by means of earthing connections
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/475—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pistons, accumulators or press rams
    • B29C48/48—Two or more rams or pistons
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/58—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising fillers only, e.g. particles, powder, beads, flakes, spheres
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

1479590 Polytetrafluoroethylene tube SUPERFLEXIT Ltd 14 Nov 1974 [7 Nov 1973 12 Dec 1973] 51633/73 and 57605/73 Addition to 1320336 Heading F2P [Also in Division B5] An extruded polytetrafluoroethylene tube includes one or more conductive strips extending longitudinally of the tube interior or exterior surface, for the dissipation of electrostatic charges. The tube may be of “ internal diameter and 0À040 inch wall thickness and with a single interior conducting strip of which conductivities are stated. The tube is extruded (see Divisions B4-B5) from a unitary tubular preform, compression moulded from p.t.f.e. particles and lubricant together with an insert defining the conductive strip and comprising 3 to 25% by weight of carbon black or iron oxide particles dispersed in a matrix of particles of the p.t.f.e., or polyethylene, or polypropylene, and lubricant. The same lubricant, e.g. white spirit, or naptha, is preferably employed for the insert as for the remainder of the preform and comprises, for the insert 6, to 24% and preferably 16% by weight on the weight of the plastics particles of the matrix. After extrusion, the tube is dried to remove lubricant and then sintered at above 700‹ F. Drying may be at room temperature for 24 hours, followed by sintering at 740‹ F. for 2 hours. Alternatively, the extrusion can be passed continuously through a drying, and then through a sintering run respectively at 320‹ and at 800‹ F. or above.
GB51633/73A 1974-11-14 1974-11-14 Dissipation of electrostatic charges from insulating materials Expired GB1479590A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB51633/73A GB1479590A (en) 1974-11-14 1974-11-14 Dissipation of electrostatic charges from insulating materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB51633/73A GB1479590A (en) 1974-11-14 1974-11-14 Dissipation of electrostatic charges from insulating materials

Publications (1)

Publication Number Publication Date
GB1479590A true GB1479590A (en) 1977-07-13

Family

ID=10460800

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51633/73A Expired GB1479590A (en) 1974-11-14 1974-11-14 Dissipation of electrostatic charges from insulating materials

Country Status (1)

Country Link
GB (1) GB1479590A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0674470A1 (en) * 1994-03-25 1995-09-27 Sotralentz S.A. Container made of thermoplastic, synthetic material and obtained by means of blow moulding for carrying hazardous fluid materials
GB2481979A (en) * 2010-07-12 2012-01-18 Axon Cable Sa Sintered PTFE sheathed wire prepared in a low-oxygen atmosphere
CN112643984A (en) * 2020-12-29 2021-04-13 南京肯特复合材料股份有限公司 Special-shaped pipe fitting forming method used in communication field

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0674470A1 (en) * 1994-03-25 1995-09-27 Sotralentz S.A. Container made of thermoplastic, synthetic material and obtained by means of blow moulding for carrying hazardous fluid materials
GB2481979A (en) * 2010-07-12 2012-01-18 Axon Cable Sa Sintered PTFE sheathed wire prepared in a low-oxygen atmosphere
GB2481979B (en) * 2010-07-12 2012-08-29 Axon Cable Sa A method of fabricating an electric wire having a ptfe-based sheath, said electric wire, and a corresponding lubricant evaporation and sintering line
CN112643984A (en) * 2020-12-29 2021-04-13 南京肯特复合材料股份有限公司 Special-shaped pipe fitting forming method used in communication field

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee