WO2008040943A3 - Improvements relating to the measurement of viscosity - Google Patents

Improvements relating to the measurement of viscosity Download PDF

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Publication number
WO2008040943A3
WO2008040943A3 PCT/GB2007/003691 GB2007003691W WO2008040943A3 WO 2008040943 A3 WO2008040943 A3 WO 2008040943A3 GB 2007003691 W GB2007003691 W GB 2007003691W WO 2008040943 A3 WO2008040943 A3 WO 2008040943A3
Authority
WO
WIPO (PCT)
Prior art keywords
extrudate material
viscosity
extrusion system
estimated
measurements
Prior art date
Application number
PCT/GB2007/003691
Other languages
French (fr)
Other versions
WO2008040943A2 (en
Inventor
Stephen Thompson
Marion Mcafee
Original Assignee
Univ Belfast
Stephen Thompson
Marion Mcafee
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
Priority claimed from GB0619397A external-priority patent/GB0619397D0/en
Priority claimed from GB0716269A external-priority patent/GB0716269D0/en
Application filed by Univ Belfast, Stephen Thompson, Marion Mcafee filed Critical Univ Belfast
Publication of WO2008040943A2 publication Critical patent/WO2008040943A2/en
Publication of WO2008040943A3 publication Critical patent/WO2008040943A3/en

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
    • B29C48/92—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
    • B29C2948/92019—Pressure
    • 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
    • B29C2948/92038—Torque
    • 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
    • B29C2948/92047—Energy, power, electric current or voltage
    • 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
    • B29C2948/92085—Velocity
    • B29C2948/92095—Angular velocity
    • 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
    • B29C2948/92504—Controlled parameter
    • B29C2948/92695—Viscosity; Melt flow index [MFI]; Molecular weight
    • 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
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92885—Screw or gear
    • 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
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing
    • 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
    • B29C48/07—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

Abstract

A method of determining the viscosity of an extrudate material in an extrusion system, comprising the steps of (i) acquiring measurements (T, N) of one or more process conditions of the extrusion system, (ii) acquiring indications of throughput of the extrudate material through the extrusion system, (iii) acquiring pressure measurements (Pm) of the extrudate material at one or more locations of the extrusion system, (iv) using a first model (40) to generate an estimated viscosity (η) of the extrudate material using data relating to the material and one of the measurements of the or each process condition, (v) using a second model (42) to generate an estimated pressure (Pe) of the extrudate material using data relating to the extrusion system geometry, the estimated viscosity (η) of the extrudate material and one of the indications of the extrudate material throughput, (vi) comparing the estimated pressure (Pe) of the extrudate material with a pressure measurement (Pm) of the extrudate material to generate a pressure difference value (Pdif), (vii) using the pressure difference value (Pdif) to generate a viscosity correction value, (viii) feeding the viscosity correction value into the first model (40) and using the viscosity correction value in the generation of a next estimated viscosity of the extrudate material, and (ix) repeating steps (iii) to (viii) one or more times, each repetition using another of the measurements of the or each process condition and another of the indications of the extrudate material throughput, wherein the generated pressure difference values are driven towards a minimum value.
PCT/GB2007/003691 2006-10-02 2007-09-28 Improvements relating to the measurement of viscosity WO2008040943A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0619397.3 2006-10-02
GB0619397A GB0619397D0 (en) 2006-10-02 2006-10-02 Improvements relating to the measurement of viscosity
GB0716269A GB0716269D0 (en) 2007-08-21 2007-08-21 Improvements relating to the measurement of viscosity
GB0716269.6 2007-08-21

Publications (2)

Publication Number Publication Date
WO2008040943A2 WO2008040943A2 (en) 2008-04-10
WO2008040943A3 true WO2008040943A3 (en) 2008-12-24

Family

ID=39268842

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2007/003691 WO2008040943A2 (en) 2006-10-02 2007-09-28 Improvements relating to the measurement of viscosity

Country Status (1)

Country Link
WO (1) WO2008040943A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2481431A (en) 2010-06-24 2011-12-28 Cherry Pipes Ltd Polymer Extrusion
US10899059B2 (en) * 2017-05-12 2021-01-26 Kuraray Europe Gmbh Method for producing films based on plasticized polyvinyl acetal having a predefined viscosity
WO2021105325A1 (en) 2019-11-28 2021-06-03 Basf Se Method and controlling system for controlling polymer viscosity quality

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841147A (en) * 1973-02-05 1974-10-15 Eastman Kodak Co Method and apparatus for determining the inherent viscosity of a liquid
WO1994012333A1 (en) * 1992-12-03 1994-06-09 W.R. Grace & Co.-Conn. Casting hollow fiber membranes
US20040020272A1 (en) * 2002-07-31 2004-02-05 Ye-Gang Lin In-line rheometer device and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841147A (en) * 1973-02-05 1974-10-15 Eastman Kodak Co Method and apparatus for determining the inherent viscosity of a liquid
WO1994012333A1 (en) * 1992-12-03 1994-06-09 W.R. Grace & Co.-Conn. Casting hollow fiber membranes
US20040020272A1 (en) * 2002-07-31 2004-02-05 Ye-Gang Lin In-line rheometer device and method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
KUMAR A ET AL: "A model based approach for estimation and control for polymer compounding (april 2003)", PROCEEDINGS OF THE 2003 IEEE INTERNATIONAL CONFERENCE ON CONTROL APPLICATIONS. CCA 2003. ISTANBUL, TURKEY, JUNE 23 - 25, 2003; [IEEE INTERNATIONAL CONFERENCE ON CONTROL APPLICATIONS], NEW YORK, NY : IEEE, US, vol. 1, 23 June 2003 (2003-06-23), pages 729 - 735, XP010652701, ISBN: 978-0-7803-7729-5 *
MCAFEE M ET AL: "In-process viscosity monitoring for extrusion control", SOCIETY OF PLASTICS ENGINEERS. ANNUAL TECHNICAL CONFERENCE (ANTEC). PROCEEDINGS, SOCIETY OF PLASTICS ENGINEERS, US, vol. 1, 1 January 2004 (2004-01-01), pages 1274 - 1278, XP008096053, ISSN: 1539-2252 *

Also Published As

Publication number Publication date
WO2008040943A2 (en) 2008-04-10

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