ZA844924B - Method for reducing surface melt fracture during extrusion of ethylene polymers - Google Patents

Method for reducing surface melt fracture during extrusion of ethylene polymers

Info

Publication number
ZA844924B
ZA844924B ZA844924A ZA844924A ZA844924B ZA 844924 B ZA844924 B ZA 844924B ZA 844924 A ZA844924 A ZA 844924A ZA 844924 A ZA844924 A ZA 844924A ZA 844924 B ZA844924 B ZA 844924B
Authority
ZA
South Africa
Prior art keywords
during extrusion
ethylene polymers
melt fracture
reducing surface
fracture during
Prior art date
Application number
ZA844924A
Other languages
English (en)
Inventor
Arakalgud Venkatapa Ramamurthy
Original Assignee
Union Carbide 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 Union Carbide Corp filed Critical Union Carbide Corp
Publication of ZA844924B publication Critical patent/ZA844924B/xx

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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • 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
    • 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
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
ZA844924A 1983-06-28 1984-06-27 Method for reducing surface melt fracture during extrusion of ethylene polymers ZA844924B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US50866983A 1983-06-28 1983-06-28

Publications (1)

Publication Number Publication Date
ZA844924B true ZA844924B (en) 1985-09-25

Family

ID=24023603

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA844924A ZA844924B (en) 1983-06-28 1984-06-27 Method for reducing surface melt fracture during extrusion of ethylene polymers

Country Status (5)

Country Link
EP (1) EP0136412A1 (xx)
JP (1) JPS6048321A (xx)
KR (1) KR850000296A (xx)
AU (1) AU2994284A (xx)
ZA (1) ZA844924B (xx)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4863674B2 (ja) * 2005-09-15 2012-01-25 中国電力株式会社 電線の電波障害低減金具及び電線の電波障害低減方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3382535A (en) * 1965-04-16 1968-05-14 Western Electric Co Minimum length extrusion die
US3761211A (en) * 1972-01-17 1973-09-25 Crompton & Knowles Corp Multi-layer extrusion apparatus
GB1441586A (en) * 1972-07-12 1976-07-07 Ici Ltd Method for reducing sharkskin on extruded polymeric material
US3879507A (en) * 1973-02-26 1975-04-22 Mobil Oil Corp Method of producing a foam-form flat film or sheet having a more balanced machine and traverse direction strength
US4187269A (en) * 1975-11-17 1980-02-05 The Dow Chemical Company Extrusion process for reducing melt fracture
US4282177A (en) * 1979-01-08 1981-08-04 Union Carbide Corporation Method for reducing sharkskin melt fracture during extrusion of ethylene polymers
DE3019280A1 (de) * 1980-05-21 1981-12-03 Röhm GmbH, 6100 Darmstadt Breitschlitzextrusionsduese mit verstellbarem betriebspunkt
US4332543A (en) * 1980-09-15 1982-06-01 Monsanto Company Extrusion die with melt flow control
US4348349A (en) * 1980-10-01 1982-09-07 Union Carbide Corporation Method for reducing melt fracture during extrusion of a molten narrow molecular weight distribution, linear, ethylene copolymer

Also Published As

Publication number Publication date
KR850000296A (ko) 1985-02-26
JPS6048321A (ja) 1985-03-16
AU2994284A (en) 1985-01-03
EP0136412A1 (en) 1985-04-10

Similar Documents

Publication Publication Date Title
IL59056A0 (en) Method for reducing melt fracture during extrusion of ethylene polymers
DE3478935D1 (en) Method for modifying the surface of polymer materials
EG19873A (en) Method for reducing sheeting during polymerization of alpha- olefins
GB2144145B (en) Process for producing butene-1
GB2143832B (en) Fog-resistant olefin polymer films
JPS57201627A (en) Method of reducing breaking of melting during extrusion of linear ethylene copolymer melted having narrow molecular weight distribution
ZA80112B (en) A method for reducing sharkskin melt fracture during extrusion of ethylene polymers
DE3568992D1 (en) Process for production of olefin polymers
GB8808107D0 (en) Method & means for improving uniformity-performance of cold feed rubber extruders
DE3477009D1 (en) Process for producing propylene block copolymers
EP0141087A3 (en) Method for the treatment of unvulcanised elastomeric articles or preforms
EP0213788A3 (en) Method for improving the clarity of propylene polymers
DE3476668D1 (en) Method of polymerizing ethylene
ZA844924B (en) Method for reducing surface melt fracture during extrusion of ethylene polymers
IL72236A (en) Process for substantially eliminating surface melt fracture when extruding ethylene polymers
DE3478027D1 (en) Quality process for isobutylene polymers
DE3471664D1 (en) Process for producing polymers of monoallylamine
DE3462263D1 (en) Process for the production of polyamide-polyester block polymers
DE3369519D1 (en) Method for the purification of propylene polymers
BG36705A1 (en) Method for polymerizing of propylene
EP0128587A3 (en) Process for producing branched alpha-olefin polymers
RU1162094C (en) Method of obtaining catalyst for polymerization of ethylene
SU1175796A1 (ru) "уctpoйctbo для пpotиboлeдoboй зaщиtы bиhto-pулeboгo komплekca"
PL240450A2 (en) Process for crosslinking of plastics
PL242679A1 (en) Method of manufacture of ethylene glycol