GB1248642A – Improved method for extruding difficult-to-process polymers
– Google Patents
GB1248642A – Improved method for extruding difficult-to-process polymers
– Google Patents
Improved method for extruding difficult-to-process polymers
Info
Publication number
GB1248642A
GB1248642A
GB52132/69A
GB5213269A
GB1248642A
GB 1248642 A
GB1248642 A
GB 1248642A
GB 52132/69 A
GB52132/69 A
GB 52132/69A
GB 5213269 A
GB5213269 A
GB 5213269A
GB 1248642 A
GB1248642 A
GB 1248642A
Authority
GB
United Kingdom
Prior art keywords
molecular weight
polymer
die
weight greater
screw
Prior art date
1968-11-20
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
GB52132/69A
Inventor
Jr J C Merges
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.)
Sunoco Inc
Original Assignee
Sun Oil 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.)
1968-11-20
Filing date
1969-10-24
Publication date
1971-10-06
1969-10-24
Application filed by Sun Oil Co
filed
Critical
Sun Oil Co
1971-10-06
Publication of GB1248642A
publication
Critical
patent/GB1248642A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
B29C48/022—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
B29C48/09—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
B29C48/25—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
B29C48/33—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles with parts rotatable relative to each other
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
B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
B29C48/83—Heating or cooling the cylinders
B29C48/832—Heating
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
B29C48/78—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
B29C48/865—Heating
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
Abstract
1,248,642. Extruding high molecular weight polymers. SUN OIL CO. 24 Oct., 1969 [20 Nov., 1968], No. 52132/69. Heading B5A. In the extrusion moulding of rods or tubes of high molecular weight thermoplastic polymers, i.e. polymers having no measurable melt index under the conditions of ASTM Method D 1238-65T, such a polymer is transported to the die of the extruder as discrete particles at a temperature below the melting point of the polymer, the polymer is heated and fused under pressure within the die to form a homogeneous molten mass at a temperature below the thermal degradation temperature of the polymer and subsequently, prior to extrusion, the polymer is cooled to a temperature below the melting point of the polymer. The polymers listed as having no measurable melt index under theabovementioned test conditions are polyethylene of molecular weight greater than 500,000, polypropylene of molecular weight greater than 400,000, polystyrene of molecular weight greater than 50,000, a polyester of molecular weight greater than 70,000, a polyamide of molecular weight greater than 90,000 and PVC of molecular weight greater than 50,000. The extrusion apparatus, which as shown forms a tubular extrudate 26, comprises up to the vicinity of the die 29 a screw 22 of constant diameter core, a heater 27 and a cooler 28, the screw preferably being chromium plated and the die being preferably chromium plated or coated with a fluorocarbon polymer. Some heating is effected by the mechanical work on the particles by the screw, but the particles are not melted prior to entry into die 29. The compression ratio between the screw and die is preferably within the range 0À2-0À9. Various tables of results are given.
GB52132/69A
1968-11-20
1969-10-24
Improved method for extruding difficult-to-process polymers
Expired
GB1248642A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US77740668A
1968-11-20
1968-11-20
Publications (1)
Publication Number
Publication Date
GB1248642A
true
GB1248642A
(en)
1971-10-06
Family
ID=25110169
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB52132/69A
Expired
GB1248642A
(en)
1968-11-20
1969-10-24
Improved method for extruding difficult-to-process polymers
Country Status (9)
Country
Link
AT
(1)
AT316111B
(en)
BE
(1)
BE741942A
(en)
BR
(1)
BR6914139D0
(en)
DE
(1)
DE1955720A1
(en)
ES
(1)
ES374058A1
(en)
FR
(1)
FR2023703A1
(en)
GB
(1)
GB1248642A
(en)
NL
(1)
NL6916631A
(en)
SE
(1)
SE374306B
(en)
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP0078515A1
(en)
*
1981-10-29
1983-05-11
Union Carbide Corporation
Method for extrusion of linear polyolefin materials
FR2832667A1
(en)
*
2001-11-27
2003-05-30
Claude Ailleau
Manufacture of porous components by agglomeration of thermoplastic granules by heating granules in matrix and cooling before total fusion
CN115158997A
(en)
*
2022-07-16
2022-10-11
西安强盛耐磨机械有限公司
Double-metal liquid composite casting spiral auger and manufacturing method thereof
Families Citing this family (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
NO173690C
(en)
*
1983-03-29
1994-01-19
Mitsui Toatsu Chemicals
Procedure for producing tubes by extrusion molding of a thermosetting resin
DD230826A1
(en)
*
1984-03-05
1985-12-11
Univ Dresden Tech
METHOD AND EXTRUSION DEVICE FOR FORMING FLOW-PROOF MASSES
GB9019217D0
(en)
*
1990-08-23
1990-10-17
Atomic Energy Authority Uk
Plastics extrusion
1969
1969-10-24
GB
GB52132/69A
patent/GB1248642A/en
not_active
Expired
1969-11-04
NL
NL6916631A
patent/NL6916631A/xx
unknown
1969-11-05
DE
DE19691955720
patent/DE1955720A1/en
active
Pending
1969-11-07
AT
AT1047369A
patent/AT316111B/en
not_active
IP Right Cessation
1969-11-13
BR
BR214139/69A
patent/BR6914139D0/en
unknown
1969-11-19
BE
BE741942D
patent/BE741942A/xx
unknown
1969-11-19
SE
SE6915926A
patent/SE374306B/xx
unknown
1969-11-19
FR
FR6939724A
patent/FR2023703A1/fr
not_active
Withdrawn
1969-11-19
ES
ES374058A
patent/ES374058A1/en
not_active
Expired
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP0078515A1
(en)
*
1981-10-29
1983-05-11
Union Carbide Corporation
Method for extrusion of linear polyolefin materials
FR2832667A1
(en)
*
2001-11-27
2003-05-30
Claude Ailleau
Manufacture of porous components by agglomeration of thermoplastic granules by heating granules in matrix and cooling before total fusion
CN115158997A
(en)
*
2022-07-16
2022-10-11
西安强盛耐磨机械有限公司
Double-metal liquid composite casting spiral auger and manufacturing method thereof
CN115158997B
(en)
*
2022-07-16
2023-09-12
西安强盛耐磨机械有限公司
Double-metal liquid composite casting spiral auger and manufacturing method thereof
Also Published As
Publication number
Publication date
AT316111B
(en)
1974-06-25
NL6916631A
(en)
1970-05-22
BE741942A
(en)
1970-05-19
FR2023703A1
(en)
1970-08-21
DE1955720A1
(en)
1970-06-11
SE374306B
(en)
1975-03-03
BR6914139D0
(en)
1973-01-11
ES374058A1
(en)
1972-02-16
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