GB1108972A - Production of thermoplastic powders - Google Patents

Production of thermoplastic powders

Info

Publication number
GB1108972A
GB1108972A GB3369965A GB3369965A GB1108972A GB 1108972 A GB1108972 A GB 1108972A GB 3369965 A GB3369965 A GB 3369965A GB 3369965 A GB3369965 A GB 3369965A GB 1108972 A GB1108972 A GB 1108972A
Authority
GB
United Kingdom
Prior art keywords
orifices
strands
vinyl
polylaurolactam
powders
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
GB3369965A
Inventor
Johann Hotz
Wolfgang Immel
Klaus Koch
Karl Mahler
Hans-Juergen Mueller
Ludwig Raichle
Friedrich Urban
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.)
BASF SE
Original Assignee
BASF SE
Badische Anilin and Sodafabrik AG
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 BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB1108972A publication Critical patent/GB1108972A/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
    • B29B9/00—Making granules
    • 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
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • 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
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B29B9/065—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion under-water, e.g. underwater pelletizers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Polyamides (AREA)

Abstract

Thermoplastic synthetic resin powders are prepared by extruding the molten resin through a plurality of orifices to form strands and breaking up the strands to a powder by means of gas stream blown at a velocity of at least 100/m./sec. on to the strands as they are extruded from the orifices and in a direction perpendicular to the direction of extrusion, the flow velocity of the gas not being allowed to decrease in the region of the orifices. Specified resins are polyamides, e.g. polycaprolactam, polylaurolactam and polycapryllactam and dicarboxlic acid/diamine condensates such as those derived from adipic and sebacic acids and hexamethylenediamine, octamethylenediamine and 2,2 - (4,41 - diaminocyclohexyl) propane; and polymers of olefins, styrene, vinyl esters, vinyl ethers, alkyl acrylates and methacrylates, conjugated diolefins, vinyl chloride and tetrafluoroethylene. Apparatus suitable for carrying out the process of the invention is described and illustrated, and examples describe the preparation of powders from (1-3) "high pressure" polyethylene, (4) polylaurolactam, (5) polystyrene, (6) anethylene/vinyl acetate copolymer, (7) an ethylene/n-butyl acrylate copolymer and (8) "low pressure" polyethylene.
GB3369965A 1964-08-14 1965-08-06 Production of thermoplastic powders Expired GB1108972A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0078116 1964-08-14

Publications (1)

Publication Number Publication Date
GB1108972A true GB1108972A (en) 1968-04-10

Family

ID=6979738

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3369965A Expired GB1108972A (en) 1964-08-14 1965-08-06 Production of thermoplastic powders

Country Status (9)

Country Link
AT (1) AT298777B (en)
BE (1) BE668324A (en)
CH (1) CH453664A (en)
DK (1) DK119945B (en)
FI (1) FI48424C (en)
GB (1) GB1108972A (en)
IL (1) IL24119A (en)
LU (1) LU49228A1 (en)
NL (1) NL6510470A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5147593A (en) * 1990-01-10 1992-09-15 Herbert Huttllin Method to prepare extruded particles by breaking with an air stream

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1163386B (en) * 1983-05-19 1987-04-08 Montedison Spa PROCEDURE FOR THE PRODUCTION OF EXPANDABLE GRANULES OF THERMOPLASTIC POLYMERS AND RELATED EQUIPMENT
US4954352A (en) * 1988-07-27 1990-09-04 Exxon Chemical Patents Inc. Apparatus for producing particles of thermoplastic material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5147593A (en) * 1990-01-10 1992-09-15 Herbert Huttllin Method to prepare extruded particles by breaking with an air stream

Also Published As

Publication number Publication date
FI48424B (en) 1974-07-01
AT298777B (en) 1972-04-15
CH453664A (en) 1968-03-31
DK119945B (en) 1971-03-15
IL24119A (en) 1968-11-27
FI48424C (en) 1974-10-10
NL6510470A (en) 1966-02-15
LU49228A1 (en) 1965-10-04
BE668324A (en) 1966-02-14
DE1454760B2 (en) 1972-11-30
DE1454760A1 (en) 1969-05-08

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