CA2003511A1 - Biaxially oriented polyamide film and method for producing the same - Google Patents
Biaxially oriented polyamide film and method for producing the sameInfo
- Publication number
- CA2003511A1 CA2003511A1 CA 2003511 CA2003511A CA2003511A1 CA 2003511 A1 CA2003511 A1 CA 2003511A1 CA 2003511 CA2003511 CA 2003511 CA 2003511 A CA2003511 A CA 2003511A CA 2003511 A1 CA2003511 A1 CA 2003511A1
- Authority
- CA
- Canada
- Prior art keywords
- film
- polyamide film
- shrinkage
- biaxially oriented
- oriented polyamide
- 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.)
- Granted
Links
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Heat setting by the conventional tentering method provides polyamide film which is anisotropic in heat shrinkage. Therefore, only the central part of the film can be used for applications which need a low degree of anisotropy.
The present invention provides an improved method of heat-setting biaxially oriented polyamide film in flat form. Said method is characterized in that biaxially oriented polyamide film, with the edges thereof gripped, is heated to an adequate temperature after preheating the polyamide film when it is desired, which is 10-40°C lower than the melting point of the film, by bringing it into close contact with the surface of a heating body, and immediately thereafter the film is cooled to a temperature at which the film does not deform easily.
The present invention also provides biaxially oriented polyamide film which has a uniform heat shrinkage across the entire width of the film. The shrinkage by hot water at 100°C is smaller than 5.0 % in all the directions in the plane, and the anisotropy H (%) in hot water shrinkage which is calculated from the formula below is less than 30%, preferably less than 20%, across the entire width of the film.
(see fig. I) (where S45 and S135 respectively denote the shrinkage (by hot water at 100°C) in the directions deviated leftward 45° and 135° from the machine direction.)
The present invention provides an improved method of heat-setting biaxially oriented polyamide film in flat form. Said method is characterized in that biaxially oriented polyamide film, with the edges thereof gripped, is heated to an adequate temperature after preheating the polyamide film when it is desired, which is 10-40°C lower than the melting point of the film, by bringing it into close contact with the surface of a heating body, and immediately thereafter the film is cooled to a temperature at which the film does not deform easily.
The present invention also provides biaxially oriented polyamide film which has a uniform heat shrinkage across the entire width of the film. The shrinkage by hot water at 100°C is smaller than 5.0 % in all the directions in the plane, and the anisotropy H (%) in hot water shrinkage which is calculated from the formula below is less than 30%, preferably less than 20%, across the entire width of the film.
(see fig. I) (where S45 and S135 respectively denote the shrinkage (by hot water at 100°C) in the directions deviated leftward 45° and 135° from the machine direction.)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2003511 CA2003511C (en) | 1989-11-21 | 1989-11-21 | Biaxially oriented polyamide film and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2003511 CA2003511C (en) | 1989-11-21 | 1989-11-21 | Biaxially oriented polyamide film and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2003511A1 true CA2003511A1 (en) | 1991-05-21 |
| CA2003511C CA2003511C (en) | 1998-11-10 |
Family
ID=4143599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2003511 Expired - Lifetime CA2003511C (en) | 1989-11-21 | 1989-11-21 | Biaxially oriented polyamide film and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2003511C (en) |
-
1989
- 1989-11-21 CA CA 2003511 patent/CA2003511C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2003511C (en) | 1998-11-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0392025A4 (en) | Biaxially oriented polyamide film and process for its production | |
| JPS5669360A (en) | Amorphous magnetic alloy material and its manufacture | |
| KR900016326A (en) | Uniaxially stretched molded article of polytetrafluoroethylene | |
| AU644654B2 (en) | Domestic cooking apparatus | |
| ATE91775T1 (en) | HEAT PUMP WITH TWO SOLID SUBSTITUTE BEDS AND METHOD FOR OPERATING SUCH A HEAT PUMP. | |
| CA2056373A1 (en) | Electro-fusion fitting | |
| ATE78838T1 (en) | USE OF PREVIEW PROPYLENE RESIN PARTICLES IN MOLDING PROCESSES. | |
| CA2066300A1 (en) | Latch bearing for blow-molded case, and method and apparatus for forming same | |
| CA2003511A1 (en) | Biaxially oriented polyamide film and method for producing the same | |
| ATE110031T1 (en) | TREATMENT OF IMAGES WITH HOT-MELT INK. | |
| ATE64481T1 (en) | FERROMAGNETIC ELEMENT WITH TEMPERATURE REGULATION. | |
| JPS5573516A (en) | Manufacture of heat-resisting container from polyethylene terephthalate | |
| ES458707A1 (en) | Edge abrasion resistant plastic strapping and method and apparatus for making the same | |
| JPS5534937A (en) | Manufacturing method of thermally plastic resin stretched film | |
| SE8400535L (en) | BINDING OF THERMOPLASTIC MATERIAL | |
| FR2494830B1 (en) | HEAT EXCHANGE ELEMENT FORMED FROM PLASTIC SNAP-SHAPED TUBES AND HEAT RECOVERY USING THE SAME | |
| Fischer et al. | High temperature alloys minimize furnace downtime | |
| KR840005387A (en) | Acrylonitrile polymer film and its manufacturing method | |
| KR960022708A (en) | Polyamide Film and Manufacturing Method Thereof | |
| JPS6480590A (en) | Transferring method | |
| Burkov et al. | The Temperature Dependence of the Thermo-E. M. F. and Electrical Resistivity of Praseodymium and Neodymium in the Solid and Liquid States | |
| KR910011426A (en) | Thermal drawing method of polyester film sheet | |
| DE59010011D1 (en) | Iron with an electrically heated soleplate | |
| JPS57163266A (en) | Picture forming device | |
| JPS5313089A (en) | T emperature control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |