IE34293L - Tubular thermoplastic films - Google Patents
Tubular thermoplastic filmsInfo
- Publication number
- IE34293L IE34293L IE700750A IE75070A IE34293L IE 34293 L IE34293 L IE 34293L IE 700750 A IE700750 A IE 700750A IE 75070 A IE75070 A IE 75070A IE 34293 L IE34293 L IE 34293L
- Authority
- IE
- Ireland
- Prior art keywords
- tube
- mandrel
- pipe
- cooled
- extrusion
- Prior art date
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
- B29C48/09—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
- B29C48/91—Heating, e.g. for cross linking
-
- 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
Abstract
1,271,694. Making tubular films. IMPERIAL CHEMICAL INDUSTRIES Ltd. 5 June, 1970 [25 June, 1969], No. 32068/69. Heading B5B. Tubular films are produced by melt extruding thermoplastic materials, suitably polyethylene terephthalate, through an annular extrusion orifice and withdrawing the tube on to an internally cooled, matt-surfaced, coaxial sizing mandrel of smaller diameter than the extrusion orifice at a greater rate than the rate of extrusion, the mandrel being tapered over at least the length in which it is in contact with the contracting tube and passing the tube over a seal positioned within the tube at a point where the tube is cool enough not to stick to the seal, heating the tube to its stretching temperature and introducing gas under pressure to within the tube at a position beyond the seal and finally collapsing the expanded tubular film. In apparatus suitable for the process of the invention tubular film 4 is extruded from a cross-head extrusion die 3 and cooled by contact with a mandrel 5 which passes through the centre of the extrusion die. The mandrel is cooled internally by circulating water through pipe 8 and out of pipe 9 and the exterior of the tube is cooled by passage through a water bath 11 surrounding the tube 4 and continuously supplied with water entering through pipe 12 and exiting through pipe 13. Excess water is removed from the surface of the tube by vacuum chamber 14, evacuated via pipe 15. The tube is drawn over the tapered mandrel by nip rolls 16 which are driven at a faster peripheral speed than the rate of extrusion of the tube and which are narrower than the width of the collapsed tube so that air introduced under pressure to the inside of the tube through pipe 6, which has an exit at the end of the mandrel, can pass the rolls into the zone in which the tube is blown. The drawn tube is then heated to its optimum stretching temperature by passage through circular infra-red heater 17, oven 18 and a second ring heater 19 and stretched in a transverse direction by being blown by the air under pressure supplied through pipe 6 and in the longitudinal direction by nip rolls 25 which are rotating at a greater speed than rolls 16 and which also serve to collapse the expanded tubular film 20 after it has been cooled by air in tube 23 and guided over rolls 24 and prior to winding on reel 26. The diameter to which the heated film is blown is controlled by the air pressure supplied at 6 and measured by means of pipe 7 and sensing devices 22, which enable adjustments to be made, and also partially by cooling ring 21 which directs cold air on to the tube. The surface of the mandrel may be roughened mechanically or by coating with a particulate material, suitably a ceramic or polytetrafluoroethylene. In Fig. 3 the extruded tube 4 contracts on to mandrel 5, which is preferably tapered such that its diameter decreases at least 0.0008 inch for each inch of its length, and remains in contact therewith until it is fully cooled when it diverges from the mandrel and passes over a sealing ring 36 which prevents air under pressure which exits from pipe 6 from passing between the surface of the mandrel and the extruded tube 4. Any pressure of gas which may be generated in this section is vented to atmosphere through a hole 35. A gap 27 is provided in the extrusion head for removal of any gas pressure which may be generated in the space between the head 3 and the point of contact of the film on the cooled mandrel. Air pressure may also be supplied down this gap, if necessary, to prevent premature collapse of the freshly extruded film. The tube is suitably drawn over the mandrel at a rate of between 1.05 and 10 times, preferably between 1.05 and 5 times, faster than the rate of extrusion and when polyethylene terephthalate is used it is suitably stretched at between 85‹ and 105‹ C. to between 3 and 4¢ times biaxially by the stretching and blowing step of the process.
[GB1271694A]
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB32068/69A GB1271694A (en) | 1969-06-25 | 1969-06-25 | Process and apparatus for the production of tubular films from thermoplastic materials |
Publications (2)
Publication Number | Publication Date |
---|---|
IE34293L true IE34293L (en) | 1970-12-25 |
IE34293B1 IE34293B1 (en) | 1975-04-02 |
Family
ID=10332695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IE750/70A IE34293B1 (en) | 1969-06-25 | 1970-06-10 | Process and apparatus for the production of tubular films from thermoplastic materials |
Country Status (17)
Country | Link |
---|---|
JP (1) | JPS5244906B1 (en) |
AT (1) | AT314816B (en) |
BE (1) | BE752551A (en) |
BR (1) | BR7020013D0 (en) |
CH (1) | CH516393A (en) |
CS (1) | CS159772B2 (en) |
DE (1) | DE2029158A1 (en) |
DK (1) | DK135978B (en) |
FR (1) | FR2051243A5 (en) |
GB (1) | GB1271694A (en) |
IE (1) | IE34293B1 (en) |
LU (1) | LU61180A1 (en) |
MY (1) | MY7300173A (en) |
NL (1) | NL7009334A (en) |
RO (1) | RO85151B (en) |
SE (1) | SE360593B (en) |
ZA (1) | ZA704018B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2357993C2 (en) * | 1973-11-21 | 1983-11-17 | Reifenhäuser KG, 5210 Troisdorf | Device for the internal calibration of hollow profiles made of thermoplastic material |
JPS531252A (en) * | 1976-06-28 | 1978-01-09 | Asahi Chemical Ind | Device for producing film |
JPS57129719A (en) * | 1981-02-05 | 1982-08-11 | Toyobo Co Ltd | Manufacturing apparatus for tubular film |
JPS57182407A (en) * | 1981-05-07 | 1982-11-10 | Idemitsu Petrochem Co Ltd | Method and apparatus for preparing biaxially stretched sheet film |
CN108437425A (en) * | 2018-03-07 | 2018-08-24 | 佛山科学技术学院 | A kind of continuously shaped equipment of trail-type biaxially oriented tube of passive roller |
CN109049613B (en) * | 2018-10-08 | 2023-09-19 | 端源医疗科技无锡有限公司 | Abrupt extrusion reducing tractor and processing technology thereof |
CN112873927A (en) * | 2021-02-01 | 2021-06-01 | 段恩茂 | Continuous blow molding method for degradable plastic bag |
CN113580523B (en) * | 2021-07-30 | 2023-05-12 | 临海伟星新型建材有限公司 | Speed increasing method for PE pipe production and processing |
-
1969
- 1969-06-25 GB GB32068/69A patent/GB1271694A/en not_active Expired
-
1970
- 1970-06-10 IE IE750/70A patent/IE34293B1/en unknown
- 1970-06-12 ZA ZA704018A patent/ZA704018B/en unknown
- 1970-06-12 DE DE2029158A patent/DE2029158A1/en active Pending
- 1970-06-22 LU LU61180D patent/LU61180A1/xx unknown
- 1970-06-24 SE SE08750/70A patent/SE360593B/xx unknown
- 1970-06-24 FR FR7023288A patent/FR2051243A5/fr not_active Expired
- 1970-06-25 BR BR220013/70A patent/BR7020013D0/en unknown
- 1970-06-25 JP JP45054866A patent/JPS5244906B1/ja active Pending
- 1970-06-25 CH CH965570A patent/CH516393A/en not_active IP Right Cessation
- 1970-06-25 BE BE752551D patent/BE752551A/en unknown
- 1970-06-25 DK DK330470AA patent/DK135978B/en unknown
- 1970-06-25 AT AT574470A patent/AT314816B/en not_active IP Right Cessation
- 1970-06-25 CS CS4458A patent/CS159772B2/cs unknown
- 1970-06-25 RO RO63740A patent/RO85151B/en unknown
- 1970-06-25 NL NL7009334A patent/NL7009334A/xx not_active Application Discontinuation
-
1973
- 1973-12-31 MY MY1973173A patent/MY7300173A/en unknown
Also Published As
Publication number | Publication date |
---|---|
AT314816B (en) | 1974-04-25 |
DK135978B (en) | 1977-07-25 |
RO85151A (en) | 1984-10-31 |
GB1271694A (en) | 1972-04-26 |
LU61180A1 (en) | 1970-08-26 |
DE2029158A1 (en) | 1971-08-12 |
CS159772B2 (en) | 1975-01-31 |
ZA704018B (en) | 1971-02-24 |
BE752551A (en) | 1970-12-28 |
CH516393A (en) | 1971-12-15 |
JPS5244906B1 (en) | 1977-11-11 |
RO85151B (en) | 1984-11-30 |
BR7020013D0 (en) | 1973-01-11 |
MY7300173A (en) | 1973-12-31 |
FR2051243A5 (en) | 1971-04-02 |
IE34293B1 (en) | 1975-04-02 |
SE360593B (en) | 1973-10-01 |
NL7009334A (en) | 1970-12-29 |
DK135978C (en) | 1977-12-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2708772A (en) | Method and apparatus for extruding hollow articles | |
US2720680A (en) | Methods and machines for producing tubing and sheeting | |
US3996323A (en) | Method of producing double-walled synthetic plastics tubes having an outer wall with annular or helical corrugations | |
US3819776A (en) | Process and apparatus for the production of tubes and tubular films | |
GB1089863A (en) | Process and apparatus for the continuous production of biaxially stretched tubular films of linear polyesters | |
JP2574414B2 (en) | Method and apparatus for producing a seamless tube extruded and stretched from a partially crystalline polymer | |
GB1383001A (en) | Method and apparatus of making oriented tubular film | |
US3400184A (en) | Process and apparatus for preparing film from thermoplastic resins | |
US3218380A (en) | Process and apparatus for the manufacture of thermoplastic film | |
US3231642A (en) | Extrusion and stretching of thermoplastic film | |
US3385917A (en) | Method and apparatus for extruding plastics | |
US3307218A (en) | Apparatus for forming thin plastic tubing | |
US3235632A (en) | Process for producing biaxially oriented thermoplastic tubular film | |
US2947031A (en) | Method and apparatus for cooling extruded tubing | |
IE34293L (en) | Tubular thermoplastic films | |
US2952874A (en) | Air ring for use in the manufacture of thermoplastic tubing | |
GB948937A (en) | Method and apparatus for producing films of organic thermoplastic material having improved optical properties | |
US3814785A (en) | Heat stabilization of oriented thermoplastic films | |
US3217359A (en) | Apparatus for thermoplastic film manufacture | |
US3142865A (en) | Method and apparatus for producing thermoplastic tubing and sheeting | |
US3221084A (en) | Manufacture of polyethylene film | |
US2832994A (en) | Accessory apparatus for making blown polystyrene film | |
US3714309A (en) | Manufacture of plastic film | |
US3315308A (en) | Continuous production of biaxially oriented, crystalline, thermoplastic film | |
US3993723A (en) | Cooling thermoplastic tubes |