GB741962A - Improvements in and relating to the manufacture of films - Google Patents
Improvements in and relating to the manufacture of filmsInfo
- Publication number
- GB741962A GB741962A GB21272/53A GB2127253A GB741962A GB 741962 A GB741962 A GB 741962A GB 21272/53 A GB21272/53 A GB 21272/53A GB 2127253 A GB2127253 A GB 2127253A GB 741962 A GB741962 A GB 741962A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- rolls
- pairs
- plates
- stretching
- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Tubular film of thermoplastic material is stretched laterally by passing it through two pairs of pinch rolls, between which it is inflated, and reducing the distance between the two pairs of rolls until the desired degree of lateral stretching is obtained. Longitudinal stretching may also be effected by rotating the second pair of rolls at a higher peripheral speed than the first pair. The film, e.g. of polyethylene terephthalate, is preferably warmed to about <PICT:0741962/IV(a)/1> 80 DEG C. The stretching may be carried out continuously with production or as an after-treatment. As shown, tubular film is fed through pinch rolls 2 and guide plates 3 to the heater 4, which is cylindrical with a bell-shaped mouth and may be of polished or etched metal, or of metal coated with polytetrafluorethylene or other lubricant. The film then passes through guide plates 5 and pinch rolls 6, the plates 5 and rolls 6 being longitudinally movable. The plates 5 may be replaced by converging pairs of bars or rollers. Instead of the cylindrical heater 4 in contact with the film, an annular radiant heating element spaced from the film may be used.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB21272/53A GB741962A (en) | 1953-07-31 | 1953-07-31 | Improvements in and relating to the manufacture of films |
| FR1106083D FR1106083A (en) | 1953-07-31 | 1954-07-30 | Dandruff Manufacturing Improvements |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB21272/53A GB741962A (en) | 1953-07-31 | 1953-07-31 | Improvements in and relating to the manufacture of films |
| GB1106083X | 1953-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB741962A true GB741962A (en) | 1955-12-14 |
Family
ID=26255238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21272/53A Expired GB741962A (en) | 1953-07-31 | 1953-07-31 | Improvements in and relating to the manufacture of films |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1106083A (en) |
| GB (1) | GB741962A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1126128B (en) * | 1955-12-01 | 1962-03-22 | Hoechst Ag | Process for the production of films from macromolecular thermoplastic plastics |
| US3103170A (en) * | 1960-06-21 | 1963-09-10 | Remington Arms Co Inc | Tubing for cartridge casings and the like and method of making the same |
| US3226459A (en) * | 1962-10-03 | 1965-12-28 | Union Carbide Corp | Quenching of polyolefin film |
| US3235632A (en) * | 1962-04-18 | 1966-02-15 | Dow Chemical Co | Process for producing biaxially oriented thermoplastic tubular film |
| US3960997A (en) * | 1971-08-31 | 1976-06-01 | Horsens Plastic A/S | Method of manufacturing biaxially stretched shrink foils and an apparatus for carrying the method into effect |
| GB2201371A (en) * | 1987-01-02 | 1988-09-01 | Windmoeller & Hoelscher | Apparatus for producing tubular thermoplastic biaxially oriented film |
-
1953
- 1953-07-31 GB GB21272/53A patent/GB741962A/en not_active Expired
-
1954
- 1954-07-30 FR FR1106083D patent/FR1106083A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1126128B (en) * | 1955-12-01 | 1962-03-22 | Hoechst Ag | Process for the production of films from macromolecular thermoplastic plastics |
| US3103170A (en) * | 1960-06-21 | 1963-09-10 | Remington Arms Co Inc | Tubing for cartridge casings and the like and method of making the same |
| US3235632A (en) * | 1962-04-18 | 1966-02-15 | Dow Chemical Co | Process for producing biaxially oriented thermoplastic tubular film |
| US3226459A (en) * | 1962-10-03 | 1965-12-28 | Union Carbide Corp | Quenching of polyolefin film |
| US3960997A (en) * | 1971-08-31 | 1976-06-01 | Horsens Plastic A/S | Method of manufacturing biaxially stretched shrink foils and an apparatus for carrying the method into effect |
| GB2201371A (en) * | 1987-01-02 | 1988-09-01 | Windmoeller & Hoelscher | Apparatus for producing tubular thermoplastic biaxially oriented film |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1106083A (en) | 1955-12-12 |
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