GB880059A - Fabrication of thermoplastic resins - Google Patents

Fabrication of thermoplastic resins

Info

Publication number
GB880059A
GB880059A GB8277/60A GB827760A GB880059A GB 880059 A GB880059 A GB 880059A GB 8277/60 A GB8277/60 A GB 8277/60A GB 827760 A GB827760 A GB 827760A GB 880059 A GB880059 A GB 880059A
Authority
GB
United Kingdom
Prior art keywords
temperature
extrusion
decomposition
resin
die
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
GB8277/60A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB880059A publication Critical patent/GB880059A/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
    • 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
    • B29C48/03—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
    • B29C48/05—Filamentary, e.g. strands
    • 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
    • B29C48/06—Rod-shaped
    • 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
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

An extrusion process comprises heating a thermoplastic resin to an extrudable temperature and extruding it through a die orifice maintained at a higher temperature so that there is substantial decomposition of the surface of the resin passing through the orifice whereas the bulk of the resin is at the extrusion temperature. The process produces a fine surface on the extrusion at extrusion rates where surface fracture normally occurs, allowing higher production. Numerous resins are listed together with extrusion rates, temperatures and die temperatures which may be from 20 DEG C to 1000 DEG C higher than the decomposition temperature of the resin. A method of determining the rate of decomposition is disclosed and the die temperature may be such that the surface decomposition rate is at least 32% per hour and preferably 47% per hour. Sheets, tubes, rods and cable coverings may be extruded from solid or cellular resins and a process of coating a cable with a solid inner and cellular outer layer, from one composition, is described. The material may be injected into a mould or blown into hollow articles. Specification 829,600, Belgian Specification 560,454 and U.S.A. Specification 2,859,480 are referred to.
GB8277/60A 1959-04-06 1960-03-09 Fabrication of thermoplastic resins Expired GB880059A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US880059XA 1959-04-06 1959-04-06

Publications (1)

Publication Number Publication Date
GB880059A true GB880059A (en) 1961-10-18

Family

ID=22208561

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8277/60A Expired GB880059A (en) 1959-04-06 1960-03-09 Fabrication of thermoplastic resins

Country Status (1)

Country Link
GB (1) GB880059A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3222191A (en) * 1961-11-07 1965-12-07 Nat Distillers Chem Corp Novel packaging film and processes therefor
US3255287A (en) * 1960-07-01 1966-06-07 Phillips Petroleum Co Method of forming synthetic knopped filaments
EP0008612B1 (en) * 1978-08-30 1981-06-10 Hüls Troisdorf Aktiengesellschaft Method and apparatus for manufacturing polyvinylidene fluoride monofilaments

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3255287A (en) * 1960-07-01 1966-06-07 Phillips Petroleum Co Method of forming synthetic knopped filaments
US3222191A (en) * 1961-11-07 1965-12-07 Nat Distillers Chem Corp Novel packaging film and processes therefor
EP0008612B1 (en) * 1978-08-30 1981-06-10 Hüls Troisdorf Aktiengesellschaft Method and apparatus for manufacturing polyvinylidene fluoride monofilaments

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