GB1190698A - Process for the Production of Stretched Films Consisting of Synthetic Thermoplastic High-Polymer Material. - Google Patents
Process for the Production of Stretched Films Consisting of Synthetic Thermoplastic High-Polymer Material.Info
- Publication number
- GB1190698A GB1190698A GB3454568A GB3454568A GB1190698A GB 1190698 A GB1190698 A GB 1190698A GB 3454568 A GB3454568 A GB 3454568A GB 3454568 A GB3454568 A GB 3454568A GB 1190698 A GB1190698 A GB 1190698A
- Authority
- GB
- United Kingdom
- Prior art keywords
- laminate
- films
- film
- stretched
- individual
- 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
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- 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
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
1,190,698. Stretching films of synthetic polymeric material. KALLE A.G. 19 July, 1968 [21 July, 1967], No. 34545/68. Heading B5B. Stretched films consisting of synthetic thermoplastic high-polymer material are produced by a process wherein an " easily separable film laminate " of at least two such materials, which are stretchable under the same conditions, is stretched in such a manner that the laminate retains its capacity for separation and each component of the laminate retains its laminar form, after which the laminate is separated into individual stretched films. An " easily separable film laminate " is defined as a laminate of which the force required to separate the components of the laminate by overcoming the adhesion forces between the individual layers is lower than the force that would produce a permanent extension of either or any components of the laminate. At least one component of the laminate may have a tensionelongation curve of the type shown in Fig. 1 of the drawing and at least one other component of the laminate may have a tension-elongation curve of the type shown in Fig. 2 of the drawing, the laminate itself having a tensionelongation curve of the type shown in Fig. 3. In the figures the elongation (#), measured at 90‹ C., is plotted against the tension (#) to which the film samples are subjected. The films constituting the laminate may consist of the same polymer, e.g. polyethylene terephthalate, or different polymers, e.g. polyethylene terephthalate and polyethylene having a density of 0À915 to 0À930. The laminate may be stretched in the longitudinal and transverse directions. Stretching of the temporary laminate is generally performed in a temperature range between the glass transition temperature and the melting temperature of the polymeric material of the individual films. The individual unstretched films of the laminate may have a thickness of 20 to 500 microns, preferably 50 to 350 microns. If the films of the laminate are chemically similar, they generally have the same thickness but if they are dissimilar, it is advantageous that the film or films having the better stretching properties should be thicker. The selection of the films for processing according to the invention and the process itself should be such that the single films are stretchable in the same temperature range, the elongation at break of any single film is not exceeded during the stretching step, and the adhesion to one another of the films or components of the laminate must be retained to the extent that each film can itself retain its laminar form and not become distorted during the stretching process. The laminates may be formed by pressing together two or more preformed films at an elevated temperature or by extruding the molten film forming materials simultaneously through two or more adjacent slot-shaped extrusion orifices or two or more concentric annular extrusion orifices, the two or more individual films thereby formed being brought into contact with one another while still molten or at a temperature high enough to be plastic and adhesive, the resulting laminate being then cooled and stretched. The films used may include films of polystyrene, or of plasticized polyvinyl chloride.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK0062897 | 1967-07-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1190698A true GB1190698A (en) | 1970-05-06 |
Family
ID=7230836
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3454568A Expired GB1190698A (en) | 1967-07-21 | 1968-07-19 | Process for the Production of Stretched Films Consisting of Synthetic Thermoplastic High-Polymer Material. |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS511747B1 (en) |
BE (1) | BE718267A (en) |
FR (1) | FR1574486A (en) |
GB (1) | GB1190698A (en) |
LU (1) | LU56542A1 (en) |
NL (1) | NL6809828A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4931760A (en) * | 1972-07-20 | 1974-03-22 | ||
US5200123A (en) * | 1990-10-17 | 1993-04-06 | Hoechst Aktiengesellschaft | Process for producing ultra thin thermoplastic films |
GR980100321A (en) * | 1998-08-25 | 2000-04-27 | Plastic film production by peeling off the various layers of multi-layer films | |
EP2199127A3 (en) * | 2008-12-19 | 2010-08-04 | FUJIFILM Corporation | Polarizing film, method for producing polarizing film, polarizing plate, method for producing polarizing plate, and anti-glare vehicular film |
WO2012112368A1 (en) * | 2011-02-18 | 2012-08-23 | Cryovac, Inc. | Method of orienting a polyester film |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4058582A (en) * | 1973-05-30 | 1977-11-15 | Celanese Corporation | Simultaneous stretching of multiple plies of polymeric film |
-
1968
- 1968-07-11 NL NL6809828A patent/NL6809828A/xx not_active Application Discontinuation
- 1968-07-17 FR FR1574486D patent/FR1574486A/fr not_active Expired
- 1968-07-18 BE BE718267D patent/BE718267A/xx not_active IP Right Cessation
- 1968-07-19 LU LU56542D patent/LU56542A1/xx unknown
- 1968-07-19 GB GB3454568A patent/GB1190698A/en not_active Expired
- 1968-07-22 JP JP5156768A patent/JPS511747B1/ja active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4931760A (en) * | 1972-07-20 | 1974-03-22 | ||
JPS5222018B2 (en) * | 1972-07-20 | 1977-06-14 | ||
US5200123A (en) * | 1990-10-17 | 1993-04-06 | Hoechst Aktiengesellschaft | Process for producing ultra thin thermoplastic films |
GR980100321A (en) * | 1998-08-25 | 2000-04-27 | Plastic film production by peeling off the various layers of multi-layer films | |
EP2199127A3 (en) * | 2008-12-19 | 2010-08-04 | FUJIFILM Corporation | Polarizing film, method for producing polarizing film, polarizing plate, method for producing polarizing plate, and anti-glare vehicular film |
WO2012112368A1 (en) * | 2011-02-18 | 2012-08-23 | Cryovac, Inc. | Method of orienting a polyester film |
Also Published As
Publication number | Publication date |
---|---|
DE1704764B2 (en) | 1972-08-31 |
BE718267A (en) | 1969-01-20 |
DE1704764A1 (en) | 1971-02-25 |
FR1574486A (en) | 1969-07-11 |
LU56542A1 (en) | 1970-01-19 |
NL6809828A (en) | 1969-01-23 |
JPS511747B1 (en) | 1976-01-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
PE20 | Patent expired after termination of 20 years |