GB1261338A - Method of improving the optical properties of high pressure polyethylene - Google Patents

Method of improving the optical properties of high pressure polyethylene

Info

Publication number
GB1261338A
GB1261338A GB06181/70A GB1618170A GB1261338A GB 1261338 A GB1261338 A GB 1261338A GB 06181/70 A GB06181/70 A GB 06181/70A GB 1618170 A GB1618170 A GB 1618170A GB 1261338 A GB1261338 A GB 1261338A
Authority
GB
United Kingdom
Prior art keywords
melt
extruder
high pressure
optical properties
pressure polyethylene
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
GB06181/70A
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.)
KraussMaffei Extrusion GmbH
Original Assignee
Hermann Berstorff Maschinenbau GmbH
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 Hermann Berstorff Maschinenbau GmbH filed Critical Hermann Berstorff Maschinenbau GmbH
Publication of GB1261338A publication Critical patent/GB1261338A/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
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • 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
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

1,261,338. Treating polyethylene. HERMANN BERSTORFF MASCHINENBAU G.m.b.H. 6 April, 1970 [16 April, 1969], No. 16181/70. Heading C3P. A melt of high pressure polyethylene is homogenized by feeding the melt from the polymerization to a single worm extruder and fully homogenizing the melt by shear energy. The extruder may have a heat-exchange area relative to output of at least 1À5 sq. m./metric ton/hour. The treatment may be controlled by regulating the speed of the extruder worm and temperature of the melt in accordance with samples tapped from the end of the extruder. Conventional additives, e.g. lubricants, stabilizers and colorants, may be added to the melt in the extruder. The products are said to have improved optical properties, e.g. for the production of sheeting, bottles and laminates.
GB06181/70A 1969-04-16 1970-04-06 Method of improving the optical properties of high pressure polyethylene Expired GB1261338A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691919261 DE1919261B2 (en) 1969-04-16 1969-04-16 SINGLE SCREW EXTRUDER

Publications (1)

Publication Number Publication Date
GB1261338A true GB1261338A (en) 1972-01-26

Family

ID=5731348

Family Applications (1)

Application Number Title Priority Date Filing Date
GB06181/70A Expired GB1261338A (en) 1969-04-16 1970-04-06 Method of improving the optical properties of high pressure polyethylene

Country Status (5)

Country Link
JP (1) JPS5331903B1 (en)
DE (1) DE1919261B2 (en)
FR (1) FR2042190A5 (en)
GB (1) GB1261338A (en)
NL (1) NL163735C (en)

Also Published As

Publication number Publication date
FR2042190A5 (en) 1971-02-05
NL163735C (en) 1980-10-15
DE1919261B2 (en) 1972-08-31
DE1919261A1 (en) 1970-11-12
NL163735B (en) 1980-05-16
NL7004018A (en) 1970-10-20
JPS5331903B1 (en) 1978-09-05

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