Winding method for polymer films and apparatus thereof

Abstract

The invention provides a method for effectively removing residual air between films in the film rolls, and winding the film into rolls. The film (11) is wound on a roll core (27) provided on the winding shaft (26). Air is flown to the wound film (11) from a pneumatic pressure portion (23). The film (11) is pressed on one side of the film roll (29). The pneumatic pressure portion (23) comprises a first wind delivery head (31) and a second wind delivery head (32). Air is blown to a width direction central portion of the film (11) through a first wind delivery head (31), while air is blown to twoends along the width direction of the film through a second wind delivery head (32). The second wind delivery head (32) is provided at the downstream side of the film winding direction with respect to the first wind delivery head (31), and time difference is determined for blowing the air. And by the second wind delivery head (32), residual air in proximity of the two end portions of the film (11) can be effectively removed.

Description

technical field [0001] The invention relates to a winding method and device for a polymer film. Background technique [0002] In general, polymer films used for polarizer protective films for liquid crystal displays (LCDs) and the like are produced by a solution film-forming method. For example, in a film production line that uses this solution film-forming method to produce polymer films, polymers such as acetate fibers are dissolved in solvents with various additives such as plasticizers, UV absorbers, and lubricants to form adhesives. liquid. Then, the glue solution is flow-cast along the supporting body, that is, a roller or a strip, and peeled off at a self-supporting place. Next, the peeled soft film is conveyed by path rollers while being dried by hot air to form a polymer film (hereinafter referred to as film). [0003] This film is continuously transported to the film winding device located on the downstream side of the film production line, where the cylindrical...

AI Technical Summary

Problems solved by technology

[0010] In this way, although the air trapped in the roll is forcibly removed when the film is wound, when the product area in the width direction of the film is pressed, since the ear has already been pressed, it cannot be directed to the ear when the film is wound. Orientation excludes air that has become trapped in the product area and may cause defects in the product area

As a result, air thickness develops in areas of the film product between film layers in the film roll, which can lead to black streak defects

Images