GB1225848A - - Google Patents

Info

Publication number
GB1225848A
GB1225848A GB1225848DA GB1225848A GB 1225848 A GB1225848 A GB 1225848A GB 1225848D A GB1225848D A GB 1225848DA GB 1225848 A GB1225848 A GB 1225848A
Authority
GB
United Kingdom
Prior art keywords
film
roller
melt
edges
slot
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
Priority claimed from DE1704780A external-priority patent/DE1704780C3/en
Application filed filed Critical
Publication of GB1225848A publication Critical patent/GB1225848A/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
    • B29C48/919—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
    • B29C48/03—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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
    • 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
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • 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
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • B29C48/9165—Electrostatic pinning
    • 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
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • B29C48/917—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means by applying pressurised gas to the surface of the flat article

Landscapes

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

Abstract

1,225,848. Thermoplastic films; extruding film. KALLE A.G. 12 Dec., 1968 [13 Dec., 1967], No. 59095/68. Headings B5A and B5B. In making a film a high polymer melt is extruded at a temperature of 200‹ to 300‹ C. through a slot die on to the surface of a rotating, cooled roller, which has a surface temperature of 10‹ to 80‹ C., and rotates with a peripheral speed of 5 to 50 meters/minute the viscosity of the emerging melt being more than 2000 poise, and the film is applied flat in a thickness of more than 0À3 mm. on the roller surface and substantially vertically below the die slot, in an electrical high-voltage direct current corona field produced by a voltage of 5 to 30 kV and with the simultaneous application of dynamic gas pressure of 50 to 400 mm. water column upon that surface of the film remote from the roller surface, and further electrical direct-current corona fields, extending substantially along and over the edges of the film are then employed to hold the edges of the film in contact with the surface of the roller up to a subsequent immersion of the film in a cooling bath. The melt is preferably extruded at a specific delivery rate of more than 5000 cm.<SP>3</SP>/hour per cm. of length of slot. The high polymer may be a polyolefin, e.g. polyethylene or polypropylene. In Fig. 1, the melt passes from an etxruder through a feed pipe as shown by arrow A into extrusion die 1. The distance of the edges of the die slot from the surface of the cooling roller 2 is 1 to 10 cm. and the melt has a path of 10 to 300 mm. between the die slot and the roller surface. Roller 2 rotates in a bath 3 containing cooling liquid 3a, e.g. water. An electrode 5 passes through the pressure air housing 4 above the film and over the entire film width. Electrodes 6 and 7 begin inside the housing, extends above the surface of the film and along its edges, and terminate above the level of the liquid in the bath. Two felt strips 9 seal the lower side edges of housing 4 with respect to the surface of the roller. One of two similarly arranged nozzles for regulating the inlet of air is shown at 11. A stream of gas preferably air produces on the surface of the film the required pressure.
GB1225848D 1967-12-13 1968-12-12 Expired GB1225848A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1704780A DE1704780C3 (en) 1967-12-13 1967-12-13 Device for producing films from a thermoplastic high polymer

Publications (1)

Publication Number Publication Date
GB1225848A true GB1225848A (en) 1971-03-24

Family

ID=5688758

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1225848D Expired GB1225848A (en) 1967-12-13 1968-12-12

Country Status (5)

Country Link
JP (1) JPS5113496B1 (en)
BE (1) BE725485A (en)
FR (1) FR1594409A (en)
GB (1) GB1225848A (en)
LU (1) LU57522A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5141053A (en) * 1974-08-07 1976-04-06 Ici Ltd
WO2009127197A2 (en) * 2008-04-15 2009-10-22 Lindauer Dornier Gesellschaft Mbh Lindauer dornier gesellschaft mbh

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2196231B1 (en) * 1972-08-15 1978-01-27 Du Pont
FR2505252A1 (en) * 1981-05-06 1982-11-12 Darlet Jean Pierre Steam purging chill roll surface - receiving extruded thermoplastic sheet to ensure good sheet-roll contact and adhesion
US12043585B1 (en) 2019-07-29 2024-07-23 Flashset, Llc Rapid-setting cellular backfill with calcium sulfoaluminate cement and other powder-sized filler materials

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5141053A (en) * 1974-08-07 1976-04-06 Ici Ltd
JPS5522257B2 (en) * 1974-08-07 1980-06-16
WO2009127197A2 (en) * 2008-04-15 2009-10-22 Lindauer Dornier Gesellschaft Mbh Lindauer dornier gesellschaft mbh
WO2009127197A3 (en) * 2008-04-15 2010-03-18 Lindauer Dornier Gesellschaft Mbh Lindauer dornier gesellschaft mbh

Also Published As

Publication number Publication date
JPS5113496B1 (en) 1976-04-30
FR1594409A (en) 1970-06-01
BE725485A (en) 1969-06-13
LU57522A1 (en) 1970-06-11

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees