GB1409786A - Quenching of polymeric film - Google Patents
Quenching of polymeric filmInfo
- Publication number
- GB1409786A GB1409786A GB2234172A GB2234172A GB1409786A GB 1409786 A GB1409786 A GB 1409786A GB 2234172 A GB2234172 A GB 2234172A GB 2234172 A GB2234172 A GB 2234172A GB 1409786 A GB1409786 A GB 1409786A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- insulators
- wire
- edges
- pinning
- 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
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
- B29C48/911—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
- B29C48/03—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
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
1409786 Electrostatic pinning of films IMPERIAL CHEMICAL INDUSTRIES Ltd 17 April 1973 [12 May 1972] 22341/72 Heading B5B In apparatus for electrostatically pinning a molten polymeric film 1 to an electrically earthed casting surface 2 comprising a pinning wire electrode 8 extending transversely across the casting surface in the proximity of or prior to the region of first contact of the film thereon, the dielectric insulators 12, 13 located beyond the film edges are movable along the wire electrode by an amount corresponding to any transverse fluctuations that may occur in the film edges by means activated by a sensor of the transverse fluctuations of the film edges so that sparking between the wire electrode and the margins of the casting surface is impeded. In Fig. 2, the pinning wire is held under slight tension between fixed points 15, 16, and the tubular insulators 12, 13 which may be of polytetrafluoroethylene are gripped by clamps 18, 19, suitably of reinforced urea-formaldehyde or phenol-formaldehyde resin mounted on carriers 20 and 21, located in a guide channel not shown. The rack and pinion mechanisms 22, 24 and 23, 25 are driven by electric motors controlled by a relay circuit connected to edge sensors downstream of the casting drum which bear against the edges of the film and monitor the edge fluctuations. Actuation of the motors by the relay circuit moves cameras 20, 21 along the guide channels so that insulators 12, 13 are moved by a distance corresponding to the movement of the film edges and in the direction of the film edge movement, ensuring that the insulators remain slightly overlapping the film edges. In a modification the movement of the insulators is controlled by the comparison of output signals derived from potentiometers coupled to the drive for the casting drum 2 and that for the cameras 20, 21 as it has been found that the film edge fluctuations are proportional to changes in the linear speed of the films. Contamination of the wire by condensation of volatile matter may be avoided by electrically heating it or by impinging a hot gaseous blast thereon. In Fig. 3, a wire electrode 8 is drawn from a supply reel 28, traversed across drum 2 and wound up on reel 29 driven by motor 30, its movement and tension being governed by torque limiter 31. The wire is energized at terminal 32. This avoids wire contamination otherwise caused by condensation of volatile matter on a static electrode. In order to position the electrode accurately in relation to the film it is passed around guide pulleys 33 and 34 made of dielectric material, e.g. urea-formaldehyde or phenolformaldehyde resin together with the tubular insulators 12 and 13 through which it is threaded. Film-forming materials with which the apparatus may be used include polycarbonates, polyamides, polyimides, polysulphones, polyolefins, polyvinyl chloride, linear polyesters and polyesterethers, but it is said to be particularly useful in the production of polyethylene terephthalate film.
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2234172A GB1409786A (en) | 1972-05-12 | 1972-05-12 | Quenching of polymeric film |
AU55149/73A AU5514973A (en) | 1972-05-12 | 1973-05-02 | Quenching of polymeric film quenching of polymeric film |
IT7323693A IT987254B (en) | 1972-05-12 | 1973-05-03 | IMPROVEMENTS IN THE RAPID COOLING STAGE OF THE FABBRI CATION OF POLYMER FILMS |
NL7306467A NL7306467A (en) | 1972-05-12 | 1973-05-09 | |
FR7316659A FR2184663B1 (en) | 1972-05-12 | 1973-05-09 | |
LU67576A LU67576A1 (en) | 1972-05-12 | 1973-05-10 | |
JP48053043A JPS4955759A (en) | 1972-05-12 | 1973-05-12 | |
BE131090A BE799509A (en) | 1972-05-12 | 1973-05-14 | COOLING OF POLYMERIC FILMS, |
DE2324345A DE2324345C2 (en) | 1972-05-12 | 1973-05-14 | Device for electrostatically pinning an extruded polymer film to an electrically grounded casting surface |
US05/498,852 US3982863A (en) | 1972-05-12 | 1974-08-19 | Quenching of polymeric film |
US05/676,673 US4071589A (en) | 1972-05-12 | 1976-04-14 | Quenching of polymeric film |
NL8502354A NL8502354A (en) | 1972-05-12 | 1985-08-27 | DEVICE FOR ELECTROSTATIC FASTENING OF AN EXTRUSED POLYMER FILM. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2234172A GB1409786A (en) | 1972-05-12 | 1972-05-12 | Quenching of polymeric film |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1409786A true GB1409786A (en) | 1975-10-15 |
Family
ID=10177835
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2234172A Expired GB1409786A (en) | 1972-05-12 | 1972-05-12 | Quenching of polymeric film |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS4955759A (en) |
AU (1) | AU5514973A (en) |
BE (1) | BE799509A (en) |
DE (1) | DE2324345C2 (en) |
FR (1) | FR2184663B1 (en) |
GB (1) | GB1409786A (en) |
IT (1) | IT987254B (en) |
LU (1) | LU67576A1 (en) |
NL (2) | NL7306467A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002024432A2 (en) * | 2000-09-24 | 2002-03-28 | 3M Innovative Properties Company | Extrusion method and apparatus for manufacturing microporous film |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2540681C3 (en) * | 1975-09-12 | 1979-03-08 | Hoechst Ag, 6000 Frankfurt | Device for the surface treatment of foil webs by means of electrical discharges |
JPS60214922A (en) * | 1984-04-11 | 1985-10-28 | Sumitomo Bakelite Co Ltd | Manufacture of thermoplastic resin film |
JP2587275B2 (en) * | 1988-08-01 | 1997-03-05 | 横浜ゴム株式会社 | Rubber composition for tire |
DE102019112077A1 (en) | 2019-05-09 | 2020-11-12 | Brückner Maschinenbau GmbH & Co. KG | Plant for the production of a cast film and film stretching plant with such a plant |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3571853A (en) * | 1969-05-12 | 1971-03-23 | Du Pont | Electrostatic pinning of extruded polymeric film |
-
1972
- 1972-05-12 GB GB2234172A patent/GB1409786A/en not_active Expired
-
1973
- 1973-05-02 AU AU55149/73A patent/AU5514973A/en not_active Expired
- 1973-05-03 IT IT7323693A patent/IT987254B/en active
- 1973-05-09 NL NL7306467A patent/NL7306467A/xx active Search and Examination
- 1973-05-09 FR FR7316659A patent/FR2184663B1/fr not_active Expired
- 1973-05-10 LU LU67576A patent/LU67576A1/xx unknown
- 1973-05-12 JP JP48053043A patent/JPS4955759A/ja active Pending
- 1973-05-14 BE BE131090A patent/BE799509A/en not_active IP Right Cessation
- 1973-05-14 DE DE2324345A patent/DE2324345C2/en not_active Expired
-
1985
- 1985-08-27 NL NL8502354A patent/NL8502354A/en not_active Application Discontinuation
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002024432A2 (en) * | 2000-09-24 | 2002-03-28 | 3M Innovative Properties Company | Extrusion method and apparatus for manufacturing microporous film |
WO2002024432A3 (en) * | 2000-09-24 | 2002-06-13 | 3M Innovative Properties Co | Extrusion method and apparatus for manufacturing microporous film |
US6790404B2 (en) | 2000-09-24 | 2004-09-14 | 3M Innovative Properties Company | Process of making microporous film |
US6994533B2 (en) | 2000-09-24 | 2006-02-07 | 3M Innovative Properties Company | Extruder with condenser |
CN100464826C (en) * | 2000-09-24 | 2009-03-04 | 3M创新有限公司 | Extrusion method and apparatus for manufacturing microporous film |
Also Published As
Publication number | Publication date |
---|---|
LU67576A1 (en) | 1974-06-05 |
NL7306467A (en) | 1973-11-14 |
NL8502354A (en) | 1985-12-02 |
FR2184663A1 (en) | 1973-12-28 |
AU5514973A (en) | 1974-11-07 |
DE2324345A1 (en) | 1973-11-22 |
BE799509A (en) | 1973-11-14 |
DE2324345C2 (en) | 1984-04-05 |
IT987254B (en) | 1975-02-20 |
FR2184663B1 (en) | 1983-09-30 |
JPS4955759A (en) | 1974-05-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |