CA1028114A - Method for reducing sharkskin - Google Patents

Method for reducing sharkskin

Info

Publication number
CA1028114A
CA1028114A CA176,193A CA176193A CA1028114A CA 1028114 A CA1028114 A CA 1028114A CA 176193 A CA176193 A CA 176193A CA 1028114 A CA1028114 A CA 1028114A
Authority
CA
Canada
Prior art keywords
sharkskin
reducing
reducing sharkskin
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
CA176,193A
Other languages
English (en)
French (fr)
Other versions
CA176193S (en
Inventor
Frederic N. Cogswell
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Application granted granted Critical
Publication of CA1028114A publication Critical patent/CA1028114A/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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/87—Cooling
    • 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
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92209—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/92409—Die; Nozzle zone
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0072—Roughness, e.g. anti-slip
    • B29K2995/0073—Roughness, e.g. anti-slip smooth

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
CA176,193A 1972-07-12 1973-07-11 Method for reducing sharkskin Expired CA1028114A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3255972A GB1441586A (en) 1972-07-12 1972-07-12 Method for reducing sharkskin on extruded polymeric material

Publications (1)

Publication Number Publication Date
CA1028114A true CA1028114A (en) 1978-03-21

Family

ID=10340527

Family Applications (1)

Application Number Title Priority Date Filing Date
CA176,193A Expired CA1028114A (en) 1972-07-12 1973-07-11 Method for reducing sharkskin

Country Status (14)

Country Link
US (1) US3920782A (xx)
JP (1) JPS579936B2 (xx)
AR (1) AR206500A1 (xx)
AT (1) AT344979B (xx)
AU (1) AU465204B2 (xx)
BE (1) BE802274A (xx)
CA (1) CA1028114A (xx)
DE (1) DE2335065C2 (xx)
ES (1) ES416843A1 (xx)
FR (1) FR2191990B1 (xx)
GB (1) GB1441586A (xx)
IT (1) IT998228B (xx)
NL (1) NL177808C (xx)
SE (1) SE399386B (xx)

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4267146A (en) * 1979-01-08 1981-05-12 Union Carbide Corporation Method for reducing melt fracture during extrusion of ethylene polymers
US4282177A (en) * 1979-01-08 1981-08-04 Union Carbide Corporation Method for reducing sharkskin 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
US4360494A (en) * 1981-04-01 1982-11-23 Union Carbide Corporation Process for reducing melt fracture during extrusion of a molten narrow molecular weight distribution, linear, ethylene copolymer
US4522776A (en) * 1983-06-28 1985-06-11 Union Carbide Corporation Process for substantially eliminating surface melt fracture when extruding ethylene polymers
US4552712A (en) * 1983-06-28 1985-11-12 Union Carbide Corporation Process for reducing surface melt fracture during extrusion of ethylene polymers
CA1210917A (en) * 1983-06-28 1986-09-09 Arakalgud V. Ramamurthy Process for reducing surface melt fracture during extrusion of ethylene polymers
KR850000296A (ko) * 1983-06-28 1985-02-26 에드워드 지·그라이어 에틸렌 공중합체 압출시 표면 용융파괴의 감소 방법
US4554120A (en) * 1983-06-28 1985-11-19 Union Carbide Corporation Process for eliminating surface melt fracture during extrusion of thermoplastic polymers
US4485062A (en) * 1983-07-05 1984-11-27 E. I. Du Pont De Nemours And Company Process for extruding polymers
NL8400375A (nl) * 1984-02-07 1985-09-02 Stamicarbon Werkwijze voor het vervaardigen van blaasfolie.
NL8400374A (nl) * 1984-02-07 1985-09-02 Stamicarbon Werkwijze voor het vervaardigen van blaasfolie.
US4832897A (en) * 1984-02-07 1989-05-23 Stamicarbon B.V. Process for the preparation of blown film
DE8430508U1 (de) * 1984-10-17 1985-02-28 Windmöller & Hölscher, 4540 Lengerich Extrusionsduese fuer einen blaskopf zur herstellung von kunststoffblasfolien
US4717522A (en) * 1985-03-22 1988-01-05 Ball Corporation Thermoplastic container forming method
US4717523A (en) * 1985-03-22 1988-01-05 Ball Corporation Thermoplastic container forming method
US4650628A (en) * 1985-03-22 1987-03-17 Ball Corporation Thermoplastic container forming method
US4696636A (en) * 1985-03-22 1987-09-29 Ball Corporation Thermoplastic container forming apparatus
US4615858A (en) * 1985-05-16 1986-10-07 Mobil Oil Corporation Method and apparatus producing decorative melt fracture patterns on polymeric products
NL8502191A (nl) * 1985-08-06 1987-03-02 Stamicarbon Werkwijze voor het vervaardigen van vlakfolie.
NL8502190A (nl) * 1985-08-06 1987-03-02 Stamicarbon Werkwijze voor het vervaardigen van blaasfolie en georienteerde folie.
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
US4734240A (en) * 1986-01-24 1988-03-29 Hoechst Celanese Corporation Melt-extrusion of polymer which is capable of forming an anisotropic melt phase to form large shaped articles exhibiting improved polymeric orientation
NL8700305A (nl) * 1987-02-10 1988-09-01 Stamicarbon Werkwijze voor het vervaardigen van vlakfolie uit hogedichtheid polyetheen.
JPH0822564B2 (ja) * 1987-04-01 1996-03-06 ポリプラスチックス株式会社 ポリアセタ−ル樹脂フィルムの製造法
US4859398A (en) * 1987-07-02 1989-08-22 Mobil Oil Corporation High shear extrusion of linear low density polyethylene
FR2637533B1 (fr) * 1988-10-10 1990-12-07 Solvay Procede pour realiser, par extrusion soufflee, une gaine en resine a base de chlorure de vinyle dont au moins une face presente un aspect mat
AU621471B2 (en) * 1989-03-31 1992-03-12 Sekisui Kagaku Kogyo Kabushiki Kaisha A method for the manufacture of thermoplastic resin sheets
DE4016626A1 (de) * 1989-04-29 1990-10-31 Rehau Ag & Co Verfahren zur herstellung von profilen
US4948543A (en) * 1989-06-15 1990-08-14 Union Carbide Chemicals And Plastics Company, Inc. Process for eliminating surface melt fracture during extrusion of thermoplastic polymers
US5210142A (en) * 1992-02-13 1993-05-11 The Dow Chemical Company Reduction of melt fracture in linear polyethylene
US5270107A (en) * 1992-04-16 1993-12-14 Fiberweb North America High loft nonwoven fabrics and method for producing same
US5320798A (en) * 1993-02-17 1994-06-14 Exxon Chemical Patents, Inc. Method for processing polyolefins at high shear rates
KR100924540B1 (ko) * 2006-12-11 2009-11-02 (주)엘지하우시스 고광택 압출 성형물의 제조방법
US20130319131A1 (en) 2012-05-31 2013-12-05 Chevron Phillips Chemical Company Lp Controlling Melt Fracture in Bimodal Resin Pipe
EP3976339A1 (en) 2019-05-30 2022-04-06 Dow Global Technologies LLC Method of extruding linear low-density polyethylene (lldpe) without surface fractures in the melt

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125619A (en) * 1964-03-17 Forming plastic containers
US2541201A (en) * 1948-08-28 1951-02-13 Nat Rubber Machinery Co Method of extrusion
US2795821A (en) * 1954-03-16 1957-06-18 Okonite Co Production of extruded shapes having textured surfaces without recourse to external mechanical devices, such as embossing rolls and the like
US3057013A (en) * 1960-02-15 1962-10-09 Du Pont Method for producing pipe
DE1209282B (de) * 1961-02-25 1966-01-20 Anger Kunststoff Verfahren und Vorrichtung zur Herstellung von Rohren mit Aufweitungen und/oder Verdickungen
US3168207A (en) * 1963-04-22 1965-02-02 Haveg Industries Inc Blow molding
BE722009A (xx) * 1967-10-13 1969-03-14

Also Published As

Publication number Publication date
JPS579936B2 (xx) 1982-02-24
GB1441586A (en) 1976-07-07
FR2191990B1 (xx) 1977-02-18
IT998228B (it) 1976-01-20
ES416843A1 (es) 1976-02-16
US3920782A (en) 1975-11-18
FR2191990A1 (xx) 1974-02-08
JPS4959162A (xx) 1974-06-08
AT344979B (de) 1978-08-25
NL177808B (nl) 1985-07-01
DE2335065C2 (de) 1984-10-04
SE399386B (sv) 1978-02-13
AU5783673A (en) 1975-01-09
NL177808C (nl) 1985-12-02
ATA616673A (de) 1977-12-15
BE802274A (fr) 1974-01-14
AR206500A1 (es) 1976-07-30
AU465204B2 (en) 1975-09-18
DE2335065A1 (de) 1974-01-31
NL7309655A (xx) 1974-01-15

Similar Documents

Publication Publication Date Title
CA1028114A (en) Method for reducing sharkskin
CA1011325A (en) Catalyst-making method
CA1013492A (en) Method for making polyetherimides
AU470865B2 (en) Apparatus for cutting pipes
CA1011354A (en) Row-forming palettising apparatus
CA987116A (en) Pumpable rockbolt method
CA993730A (en) Renecking method
AU473755B2 (en) Floor-treating apparatus
AU6140273A (en) Apparatus
AU5655773A (en) Reaction method
AU469467B2 (en) Graphic process
CA964862A (en) Apparatus for chamfering tablets
CA1005826A (en) Method for preparing 2-nitro-4-amino-n-phenylaniline
CA968669A (en) Cutting apparatus
CA912921A (en) Wind-propelled apparatus
AU5873073A (en) Method for controlling fertility
CA908185A (en) Method for preparing aminoalkylphosphonates
AU6028173A (en) Pipe forming method
CA915889A (en) Forming method
AU5317373A (en) Practice apparatus for ballgames
AU483948B2 (en) Method for making tablets
CA903429A (en) Method and compositions for cable-blocking
CA894841A (en) Method for preparing thioethers
CA896097A (en) Welding method
CA906884A (en) Method for cleaning logs

Legal Events

Date Code Title Description
MKEX Expiry

Effective date: 19950321