GB924501A - Process for the orientation of tubular films - Google Patents
Process for the orientation of tubular filmsInfo
- Publication number
- GB924501A GB924501A GB25757/59A GB2575759A GB924501A GB 924501 A GB924501 A GB 924501A GB 25757/59 A GB25757/59 A GB 25757/59A GB 2575759 A GB2575759 A GB 2575759A GB 924501 A GB924501 A GB 924501A
- Authority
- GB
- United Kingdom
- Prior art keywords
- duct
- film
- air
- heated
- gas
- 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
- 239000000463 material Substances 0.000 abstract 2
- 239000004952 Polyamide Substances 0.000 abstract 1
- 239000004698 Polyethylene Substances 0.000 abstract 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 abstract 1
- 239000000155 melt Substances 0.000 abstract 1
- 229920002647 polyamide Polymers 0.000 abstract 1
- 229920000728 polyester Polymers 0.000 abstract 1
- -1 polyethylene Polymers 0.000 abstract 1
- 229920000573 polyethylene Polymers 0.000 abstract 1
- 229920000915 polyvinyl chloride Polymers 0.000 abstract 1
- 239000004800 polyvinyl chloride Substances 0.000 abstract 1
- 239000005033 polyvinylidene chloride Substances 0.000 abstract 1
- 229920001169 thermoplastic Polymers 0.000 abstract 1
- 239000004416 thermosoftening plastic Substances 0.000 abstract 1
- 230000007704 transition Effects 0.000 abstract 1
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
- B29C48/03—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
-
- 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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
-
- 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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
A tubular film of a thermoplastic polymeric material made by extrusion of a melt through an annular nozzle 2 followed by inflation with air or other gas, is conveyed through a first duct 4 at a temperature of from 5 DEG to 20 DEG C. below the softening point of the film but above its second order transition temperature, the pressure in the first duct corresponding to the internal pressure of the air or other gas in the tubular film, and the hardened and substantially amorphous film is then passed into a highly polished pipe 7 heated to substantially the same temperature, the diameter of the pipe being equal to the diameter of the tubular film, and is then guided into a second heated duct 8 in which <PICT:0924501/IV(a)/1> the pressure is lower than that in the first duct, and wound up by rollers (not shown) rotating at such a speed as to effect longitudinal stretching of the film. In the apparatus shown hot air is supplied to duct 4 via inlet 5, escaping through outlet 6, while the tube is inflated with air or other gas via 3. The duct 8 is heated with radially-arranged infra-red heaters 9. Specified materials include polyethylene, polyamides, polyesters, polyvinyl chloride and polyvinylidene chloride.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB49839A DE1194560B (en) | 1958-08-02 | 1958-08-02 | Method and device for stretching blown films in longitudinal and transverse directions |
Publications (1)
Publication Number | Publication Date |
---|---|
GB924501A true GB924501A (en) | 1963-04-24 |
Family
ID=6968995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB25757/59A Expired GB924501A (en) | 1958-08-02 | 1959-07-27 | Process for the orientation of tubular films |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH369590A (en) |
DE (1) | DE1194560B (en) |
GB (1) | GB924501A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3363035A (en) * | 1964-12-16 | 1968-01-09 | Seikisui Chemical Co Ltd | Process for stretching tubular molded articles of thermoplastic resin |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1504805B1 (en) * | 1965-08-30 | 1970-12-10 | Rehau Plastics Gmbh | Method and device for the continuous production of a shrink tube |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB781879A (en) * | 1954-08-11 | 1957-08-28 | Ici Ltd | Improvements in and relating to the manufacture of films |
-
1958
- 1958-08-02 DE DEB49839A patent/DE1194560B/en active Pending
-
1959
- 1959-04-29 CH CH7270959A patent/CH369590A/en unknown
- 1959-07-27 GB GB25757/59A patent/GB924501A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3363035A (en) * | 1964-12-16 | 1968-01-09 | Seikisui Chemical Co Ltd | Process for stretching tubular molded articles of thermoplastic resin |
Also Published As
Publication number | Publication date |
---|---|
CH369590A (en) | 1963-05-31 |
DE1194560B (en) | 1965-06-10 |
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