GB1297465A - - Google Patents

Info

Publication number
GB1297465A
GB1297465A GB1297465DA GB1297465A GB 1297465 A GB1297465 A GB 1297465A GB 1297465D A GB1297465D A GB 1297465DA GB 1297465 A GB1297465 A GB 1297465A
Authority
GB
United Kingdom
Prior art keywords
net
film
chamber
coagulant
rings
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
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 filed Critical
Publication of GB1297465A publication Critical patent/GB1297465A/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
    • 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
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B29C48/903—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies externally
    • 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
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/905—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using wet calibration, i.e. in a quenching tank
    • 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
    • B29C48/913—Cooling of hollow articles of tubular films externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0633—LDPE, i.e. low density polyethylene

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

1297465 Making tubular films POLYMER PROCESSING RESEARCH INSTITUTE Ltd 28 May 1971 [8 June 1970] 18061/71 Heading B5B Tubular film is made by downwardly extruding a polymer melt or solution from annular orifice 2 and passing the film in contact with cylindrical net 12 through reduced-pressure chamber 4 in a coagulation or quenching step, prior to flattening and wind-up. The coagulant or quenching liquid is allowed to flow down the net and in contact with the film from reservoir 5 surrounding the film, and air-tight seals are maintained by means of the coagulant at the entry and exit points to the chamber, e.g. liquid seal 6 and sponge 22, 23. The net, whose tension is adjustable, e.g. by ring 18, extends out of the bottom of the chamber, but need not extend out of the top. As shown, the entry to the chamber comprises two rings 13, 14 whose inner surfaces bear inclined grooves 42 and which also define an annular groove 45 at their meeting point. A plurality of weirs 30, 301 and a diameter control ring or rings 33 may be provided to control coagulation and net diameter respectively. Coagulant may also be supplied internally to the tube. In examples, melts of polyethylene, polypropylene, polystyrene, P.V.C., nylon or polyester, or solutions of P.V.A., P.A.N. or a P.A.N.-P.V.C. copolymer are used. During extrusion the conditions are adjusted to obtain a wrinkle free product.
GB1297465D 1970-06-08 1971-05-28 Expired GB1297465A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4931070 1970-06-08

Publications (1)

Publication Number Publication Date
GB1297465A true GB1297465A (en) 1972-11-22

Family

ID=12827362

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1297465D Expired GB1297465A (en) 1970-06-08 1971-05-28

Country Status (3)

Country Link
CA (1) CA984564A (en)
FR (1) FR2094117B1 (en)
GB (1) GB1297465A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102725121A (en) * 2009-11-10 2012-10-10 温德莫勒及霍尔希尔公司 Device and method for calibrating film tubing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2337927A (en) * 1938-02-19 1943-12-28 Sylvania Ind Corp Apparatus for making tubing
JPS5018025B1 (en) * 1968-07-26 1975-06-25

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102725121A (en) * 2009-11-10 2012-10-10 温德莫勒及霍尔希尔公司 Device and method for calibrating film tubing
CN102725121B (en) * 2009-11-10 2015-01-28 温德莫勒及霍尔希尔公司 Device and method for calibrating film tubing
US9434097B2 (en) 2009-11-10 2016-09-06 Windmoeller & Hoelscher Kg Device and method for calibrating film tubing

Also Published As

Publication number Publication date
FR2094117B1 (en) 1974-03-08
CA984564A (en) 1976-03-02
DE2125903B2 (en) 1975-12-18
FR2094117A1 (en) 1972-02-04
DE2125903A1 (en) 1971-12-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years