ZA822239B - Process for reducing melt fracture during extrusion of a molten narrow molecular weight distribution, linear, ethylene copolymer - Google Patents

Process for reducing melt fracture during extrusion of a molten narrow molecular weight distribution, linear, ethylene copolymer

Info

Publication number
ZA822239B
ZA822239B ZA822239A ZA822239A ZA822239B ZA 822239 B ZA822239 B ZA 822239B ZA 822239 A ZA822239 A ZA 822239A ZA 822239 A ZA822239 A ZA 822239A ZA 822239 B ZA822239 B ZA 822239B
Authority
ZA
South Africa
Prior art keywords
linear
molecular weight
weight distribution
ethylene copolymer
during extrusion
Prior art date
Application number
ZA822239A
Other languages
English (en)
Inventor
S Kurtz
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 ZA822239B publication Critical patent/ZA822239B/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
    • 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
    • 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
    • B29C48/07—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
    • 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
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • 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
    • 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
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0633—LDPE, i.e. low density polyethylene

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
ZA822239A 1981-04-01 1982-03-31 Process for reducing melt fracture during extrusion of a molten narrow molecular weight distribution, linear, ethylene copolymer ZA822239B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/249,914 US4360494A (en) 1981-04-01 1981-04-01 Process for reducing melt fracture during extrusion of a molten narrow molecular weight distribution, linear, ethylene copolymer

Publications (1)

Publication Number Publication Date
ZA822239B true ZA822239B (en) 1983-02-23

Family

ID=22945553

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA822239A ZA822239B (en) 1981-04-01 1982-03-31 Process for reducing melt fracture during extrusion of a molten narrow molecular weight distribution, linear, ethylene copolymer

Country Status (12)

Country Link
US (1) US4360494A (de)
EP (1) EP0061935B1 (de)
JP (1) JPS57201627A (de)
KR (1) KR830008827A (de)
AU (1) AU544475B2 (de)
BR (1) BR8201846A (de)
CA (1) CA1171218A (de)
DE (1) DE3265536D1 (de)
DK (1) DK146882A (de)
GR (1) GR81398B (de)
NO (1) NO821045L (de)
ZA (1) ZA822239B (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4532189A (en) * 1982-02-19 1985-07-30 W. R. Grace & Co., Cryovac Div. Linear polyethylene shrink films
US4525257A (en) * 1982-12-27 1985-06-25 Union Carbide Corporation Low level irradiated linear low density ethylene/alpha-olefin copolymers and film extruded therefrom
US4522776A (en) * 1983-06-28 1985-06-11 Union Carbide Corporation Process for substantially eliminating surface melt fracture when extruding ethylene polymers
US4554120A (en) * 1983-06-28 1985-11-19 Union Carbide Corporation Process for eliminating surface melt fracture during extrusion of thermoplastic polymers
US4617241A (en) * 1984-01-23 1986-10-14 W. R. Grace & Co., Cryovac Div. Linear polyethylene stretch/shrink films
US4832897A (en) * 1984-02-07 1989-05-23 Stamicarbon B.V. Process for the preparation of blown film
US4551380A (en) * 1984-05-10 1985-11-05 W. R. Grace & Co., Cryovac Div. Oriented heat-sealable multilayer packaging film
US4590124A (en) * 1984-05-10 1986-05-20 W. R. Grace & Co., Cryovac Div. Storm window film
US4514465A (en) * 1984-05-30 1985-04-30 W. R. Grace & Co., Cryovac Div. Storm window film comprising at least five layers
JPS61196070A (ja) * 1985-02-27 1986-08-30 大成建設株式会社 構造物の止水方法
NL8502191A (nl) * 1985-08-06 1987-03-02 Stamicarbon Werkwijze voor het vervaardigen van vlakfolie.
US4713205A (en) * 1985-09-25 1987-12-15 Mobil Oil Corporation Method for reducing melt fracture during extrusion of linear polyethylene homopolymers and copolymers by varying the geometry of the die exit face
US4671918A (en) * 1985-10-25 1987-06-09 National Distillers And Chemical Corporation Apparatus and process for producing polyolefin film
US4753767A (en) * 1986-04-03 1988-06-28 The Dow Chemical Company Extrusion apparatus and method
US4942010A (en) * 1986-07-17 1990-07-17 Wynn's-Precision, Inc. Method of injection molding of tubular parts to eliminate weld lines
US4711602A (en) * 1986-07-17 1987-12-08 Precision Rubber Products Corporation Turbulent flow gate for the injection molding of tubular parts, including parisons suitable for blow molding
US4780264A (en) * 1987-05-22 1988-10-25 The Dow Chemical Company Linear low density polyethylene cast film
US4859398A (en) * 1987-07-02 1989-08-22 Mobil Oil Corporation High shear extrusion of linear low density polyethylene
JP4888395B2 (ja) * 2005-12-26 2012-02-29 コニカミノルタオプト株式会社 セルロースフィルムの製造方法
DE102007029310A1 (de) 2007-02-13 2008-08-14 Kiefel Extrusion Gmbh Wendelverteiler für eine Blasfolienanlage
US20130319131A1 (en) 2012-05-31 2013-12-05 Chevron Phillips Chemical Company Lp Controlling Melt Fracture in Bimodal Resin Pipe
JP6776860B2 (ja) * 2016-12-09 2020-10-28 コニカミノルタ株式会社 サイジングダイと押出成形装置、およびそれらを用いた管状部材の製造方法
EP3976339A1 (de) 2019-05-30 2022-04-06 Dow Global Technologies LLC Verfahren zum extrudieren von linearem polyethylen niedriger dichte (lldpe) ohne oberflächenrisse in der schmelze
CN110576580B (zh) * 2019-09-04 2024-04-16 深圳市特发信息光网科技股份有限公司 线缆模具

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125620A (en) * 1964-03-17 Process for providing improved surface
US2813301A (en) * 1954-12-13 1957-11-19 Monsanto Chemicals Sheeting die
US3038209A (en) * 1958-07-10 1962-06-12 Eastman Kodak Co Method of dope-casting film at high shear rate
US3133313A (en) * 1962-10-30 1964-05-19 Nat Distillers Chem Corp Extrusion die mechanism
CH479720A (de) * 1968-03-02 1969-10-15 Glanzstoff Ag Vorrichtung zur Erzeugung von langgestreckten Gebilden, insbesondere Fäden, Fadenbündeln oder Bändchen
US3859017A (en) * 1969-02-20 1975-01-07 Rol Extrusion of sheath onto elongated support using decompression zones
GB1441586A (en) * 1972-07-12 1976-07-07 Ici Ltd Method for reducing sharkskin on extruded polymeric material
US3876740A (en) * 1972-10-27 1975-04-08 Standard Oil Co Process for improving interior surface smoothness and gloss in foamed tubular extrudates by the use of extrusion die faces of novel geometry
US3879158A (en) * 1973-01-09 1975-04-22 Enrique Schele Apparatus for extruding thermoplastic annular shapes
US3947214A (en) * 1974-12-13 1976-03-30 Corning Glass Works Extrusion die mask
US3994654A (en) * 1975-01-02 1976-11-30 Monsanto Company Die for extruding thermoplastic sheets
DE2522357C3 (de) * 1975-05-21 1980-04-24 Hoechst Ag, 6000 Frankfurt Blasextruder
US4187269A (en) * 1975-11-17 1980-02-05 The Dow Chemical Company Extrusion process for reducing melt fracture
US4243619A (en) * 1978-03-31 1981-01-06 Union Carbide Corporation Process for making film from low density ethylene hydrocarbon copolymer
US4282177A (en) * 1979-01-08 1981-08-04 Union Carbide Corporation Method for reducing sharkskin melt fracture during extrusion of ethylene polymers
US4267146A (en) * 1979-01-08 1981-05-12 Union Carbide Corporation Method for reducing melt fracture during extrusion of ethylene polymers
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
BR8201846A (pt) 1983-03-01
AU544475B2 (en) 1985-05-30
KR830008827A (ko) 1983-12-16
EP0061935B1 (de) 1985-08-21
GR81398B (de) 1984-12-11
US4360494A (en) 1982-11-23
DK146882A (da) 1982-10-02
EP0061935A3 (en) 1983-03-23
JPS57201627A (en) 1982-12-10
CA1171218A (en) 1984-07-24
DE3265536D1 (en) 1985-09-26
EP0061935A2 (de) 1982-10-06
NO821045L (no) 1982-10-04
AU8222882A (en) 1982-10-07

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