UST984006I4 - Cooling tubular extrudates - Google Patents

Cooling tubular extrudates Download PDF

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Publication number
UST984006I4
UST984006I4 US05/856,515 US85651577A UST984006I4 US T984006 I4 UST984006 I4 US T984006I4 US 85651577 A US85651577 A US 85651577A US T984006 I4 UST984006 I4 US T984006I4
Authority
US
United States
Prior art keywords
tube
cooling surface
cooling
extruded
plastics material
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.)
Pending
Application number
US05/856,515
Inventor
Michael L. Clifford
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 UST984006I4 publication Critical patent/UST984006I4/en
Pending legal-status Critical Current

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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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular 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
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/91—Heating, e.g. for cross linking
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

an improved method of cooling an extruded tube of plastics material such as a substantially crystalline polymer of propylene, is disclosed in which the extruded tube is fed, in the direction of extrusion, in heat-transfer relationship with an adjacent cooling surface, such as an internal mandrel extending axially within the extruded tube, while maintaining this cooling surface at a temperature below the melting point of the plastics material. Interposed between and in contact with the tube and the cooling surface is a continuous sheath of a heat transfer liquid having a dynamic viscosity at 20° C. of from 2 to 20,000 centipoise. Preferably the heat transfer liquid has a boiling point below that of the die during extrusion of the tube. An aqueous dispersion or solution of a viscosity modifier, such as a cellulosic resin, is used and supplied to the sheath at a rate of from 0.02 to 0.5 liters/minute/centimeter width of tube surface. The thus cooled tube is subsequently withdrawn from the cooling surface.
Further processing steps of reheating the cooled tube to its orienting temperature, transversely expanding the reheated tube by introducing a pressurizing gas into the tube and longitudinally extending the expanded tube to form a biaxially oriented tubular film may be used.
US05/856,515 1976-12-14 1977-12-01 Cooling tubular extrudates Pending UST984006I4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB52078/76 1976-12-14
GB52078/76A GB1560550A (en) 1976-12-14 1976-12-14 Cooling tubular extrudates

Publications (1)

Publication Number Publication Date
UST984006I4 true UST984006I4 (en) 1979-07-03

Family

ID=10462551

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/856,515 Pending UST984006I4 (en) 1976-12-14 1977-12-01 Cooling tubular extrudates

Country Status (6)

Country Link
US (1) UST984006I4 (en)
AU (1) AU505932B2 (en)
BE (1) BE861856A (en)
DE (1) DE2755519A1 (en)
FR (1) FR2374154A1 (en)
GB (1) GB1560550A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6824734B2 (en) * 2001-10-09 2004-11-30 Kimberly-Clark Worldwide, Inc. Method of producing latent elastic, cross-direction-oriented films

Also Published As

Publication number Publication date
AU3084677A (en) 1979-05-31
GB1560550A (en) 1980-02-06
FR2374154A1 (en) 1978-07-13
DE2755519A1 (en) 1978-06-15
BE861856A (en) 1978-06-14
AU505932B2 (en) 1979-12-06

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