Decurling method and apparatus, and film production method
a curling method and film technology, applied in the field of curling methods and equipment, and film production methods, can solve problems such as possible scratching on the surface of polymer films
Inactive Publication Date: 2014-09-02
FUJIFILM CORP
View PDF17 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
[0012]Also, a decurling method for a continuous multi-layer film is provided, the multi-layer film including a first layer having a first film surface, and a second layer, overlaid on the first layer opposite to the first film surface, having an external second film surface, wherein there is a curling tendency in an outward direction with the second film surface. The decurling method includes transporting the multi-layer film. A first transition of the second layer in the multi-layer film being transported into a rubber phase is induced by supplying fluid vapor on the second film surface. A second transition of the second layer from the rubber phase into a glass phase is induced by stopping supplying the fluid vapor. While the multi-layer film is transported, a portion of the second layer in the rubber phase is prevented from contacting a solid object.
[0026]Also, a decurling apparatus for a continuous multi-layer film is provided, the multi-layer film including a first layer having a first film surface, and a second layer, formed on the first layer, having a second film surface, and having a curling tendency in an outward direction. The decurling apparatus includes a moving device for transporting the multi-layer film. A fluid vapor source induces a first transition of the second layer in the multi-layer film being transported into a rubber phase by supplying fluid vapor on the second layer, and after supplying the fluid vapor, changes over supply of the fluid vapor to induce a second transition of the second layer from the rubber phase into a glass phase. During the first or second transition, the moving device transports the multi-layer film while the second layer is prevented from contacting a solid object.
[0027]Also, a decurling apparatus for a continuous multi-layer film is provided, the multi-layer film including a first layer having a first film surface, and a second layer, formed on the first layer, having a second film surface, and having a curling tendency in an outward direction. The decurling apparatus includes a moving device for transporting the multi-layer film. A fluid vapor source induces a first transition of the second layer in the multi-layer film being transported into a rubber phase by supplying fluid vapor on the second layer, and after supplying the fluid vapor, changes over supply of the fluid vapor to induce a second transition of the second layer from the rubber phase into a glass phase. The moving device transports the multi-layer film while a portion of the second layer in the rubber phase is prevented from contacting a solid object.
[0036]Consequently, the multi-layer film to be produced can be free from occurrence of fold creases, because the second layer is prevented from contacting a solid object during the transition into and from the rubber phase.
Problems solved by technology
There occurs a problem of possible scratch on the surface of the polymer film.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0050]In FIG. 1, a multi-layer film 10 includes a support layer 11 and a hard coat layer 12 having a higher hardness than the support layer 11. A thickness d of the multi-layer film 10 is not limited, but preferably equal to or more than 5 microns and equal to or less than 120 microns, and specifically preferably equal to or more than 40 microns and equal to or less than 100 microns. A ratio dh / ds between a thickness ds of the support layer 11 to a thickness dh of the hard coat layer 12 is preferably equal to or more than 0.04 and equal to or less than 0.50, and specifically preferably equal to or more than 0.10 and equal to or less than 0.40.
[0051]In FIG. 2, a multi-layer film production system 20 produces the multi-layer film 10. The multi-layer film production system 20 includes a film dispenser 23, a moving path 24 for a moving device, and a film winder 25. There is a support film roll 21 from which support film 22 is advanced by the film dispenser 23. In the moving path 24, the...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| distance | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
A continuous multi-layer film includes a support layer having a first film surface, and a hard coat layer, formed on the support layer, having a second film surface, and having a curling tendency in an inward direction. In the decurling method, the multi-layer film is transported. A first transition of the support layer in the multi-layer film being transported into a rubber phase is induced by supplying fluid vapor on the support layer. After supplying the fluid vapor, a second transition of the support layer from the rubber phase into a glass phase is induced. The multi-layer film is transported while a portion of the support layer in the rubber phase is prevented from contacting a solid object. The hard coat layer is formed from a polymer produced from an ultraviolet curable compound, and the support layer is formed from cellulose acylate.
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a decurling method and apparatus, and film production method. More particularly, the present invention relates to a decurling method and apparatus in which a multi-layer film to be produced can be free from occurrence of fold creases, and film production method for the multi-layer film.[0003]2. Description Related to the Prior Art[0004]Cellulose acylate film is a polymer film having good performance with transparent and soft property. Various uses of the polymer film are known, including a window laminate, touch panel film, film for an ITO board, membrane switch film, three dimensional decorative film, optical functional film for a flat panel display panel, and the like.[0005]Those uses are classified in two types. In a first type, a surface of the polymer film is touched by a finger, fabric, touch pen or the like. In a second type, the surface of the polymer film is rubbed by a finger, ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(United States)
IPC IPC(8): B29C53/18B65H23/34B65H20/16B29L9/00
CPCB29C53/18B65H2406/11B29L2009/00B65H23/34B65H2301/51145B65H20/16
Inventor TAGUCHI, TAKAOSONOBE, MASAKIOBA, TAKAHIROMIZUTANI, HIDEAKI
Owner FUJIFILM CORP