CN215940420U - Device for improving surface resistance of optical film - Google Patents

Abstract

The present invention relates to a device for improving the surface resistance of an optical film. The device for improving the surface resistance of the optical film comprises: a spraying section that sprays the surface resistance improving liquid to the optical film; a wiping unit that wipes the optical film after the spraying; a drying section that dries the optical film after the wiping. According to the utility model, the surface resistance of the whole roll of optical film can be improved by spraying the surface resistance improving liquid on the optical film on the basis of not changing the existing raw material formula of the optical film, and the phenomenon of electrification (such as static electricity) generated on the surface of the optical film in and after the processing of the optical film is avoided or reduced, so that the final film products are prevented or reduced from being mutually adsorbed and adhered.

Description

Device for improving surface resistance of optical film

Technical Field

The present invention relates to a device for improving the surface resistance of an optical film.

Background

During and after processing of the optical film, charging (e.g., static electricity) occurs on the surface of the optical film, which may cause the final film products to adhere to each other and "stick".

Currently, the improvement of the surface resistance of an optical film is generally achieved by improving the formulation of a certain component material of the optical film.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a device for improving the surface resistance of an optical film, which can improve the surface resistance of the whole roll of the optical film by spraying a surface resistance improving solution on the optical film without changing the existing raw material formula of the optical film.

The utility model discloses a device for improving the surface resistance of an optical film, which comprises:

a spraying section that sprays the surface resistance improving liquid to the optical film;

a wiping unit that wipes the optical film after the spraying;

a drying section that dries the optical film after the wiping.

Alternatively, the spray section includes one or more nozzle groups, each including a plurality of single nozzles arranged in the web direction.

Alternatively, each single spray head is controlled to spray continuously or intermittently with adjustable on-off time.

Alternatively, the opening and closing of each individual spray head is controlled individually.

Optionally, the apparatus further comprises:

a shroud portion surrounding the spray portion.

Optionally, the shroud portion comprises a venting device and a drainage groove.

Optionally, the apparatus further comprises:

the bearing part is positioned below the spraying part.

Optionally, the wiping section comprises a wiping rod and a wiping cloth extending in the web direction.

Optionally, the drying section provides normal temperature purified air or warm purified air.

Optionally, the apparatus further comprises:

a plurality of guide rollers that guide the optical film to flow in a flow direction.

Alternatively, the plurality of guide rollers controls the tension of the flowing optical film to be 0 to 300N, and controls the flow speed of the flowing optical film to be 0 to 30 m/min.

Compared with the prior art, the utility model has the main differences and the effects that:

according to the utility model, the surface resistance of the whole roll of optical film can be improved by spraying the surface resistance improving liquid on the optical film on the basis of not changing the existing raw material formula of the optical film, and the phenomenon of electrification (such as static electricity) generated on the surface of the optical film in and after the processing of the optical film is avoided or reduced, so that the final film products are prevented or reduced from being mutually adsorbed and adhered.

Drawings

Fig. 1 is a structural diagram of an apparatus for improving the surface resistance of an optical film.

Detailed Description

In order to make the purpose and technical solution of the embodiments of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model without any inventive step, are within the scope of protection of the utility model.

Embodiments of the present invention relate to an apparatus for improving surface resistance of an optical film. Fig. 1 is a structural diagram of an apparatus for improving the surface resistance of an optical film.

As shown in fig. 1, the apparatus for improving the surface resistance of an optical film includes a spray unit 102, a wiping unit 103, and a drying unit 104. The spraying section 102 sprays the surface resistance improving liquid onto the optical film 101. The wiping unit 103 wipes the optical film 101 after the coating. The drying section 104 dries the wiped optical film 101.

First, the optical film 101 passes through the coating portion 102, and the surface resistance improving liquid is sprayed on the first surface of the optical film 101 facing the coating portion 102. Then, the optical film 101 after the spraying passes through the wiping section 103, and the excess surface resistance improving liquid on the first surface of the optical film 101 is wiped off. Finally, the wiped optical film 101 passes through the drying section 104, and the surface resistance improving solution remaining on the first surface of the optical film 101 is dried. The surface resistance of the dried optical film 101 is improved without leaving liquid on the surface, and the existing raw material formulation of the optical film 101 is not changed.

The optical film 101 may be a flexible optical film, and more specifically may be a polarizing film or the like.

The surface resistance improving liquid can be antistatic liquid or antistatic liquid and the like.

The spray section 102 includes one or more nozzle groups, each including a plurality of single nozzles arranged in the web direction. As shown in fig. 1, the web direction may be understood as a width direction of the optical film 101. Full coverage spraying of the optical film 101 in a single-sided web direction can be achieved by a plurality of single nozzles arranged in the web direction.

The vertical position of each single spray head in the height direction can be adjusted, the front, back, left and right positions in the horizontal direction can be adjusted, and the adjustment of the relative position of each single spray head can be realized through the adjustment of the position of each single spray head.

Each single spray head uses a liquid spraying system in the form of a liquid and compressed air channel, and forms a uniform mist of surface resistance improving liquid when sprayed.

Each single spray head is controlled to spray continuously or intermittently with adjustable on-off time. In the case of continuous spraying, the amount of spray per one spray head is controlled within the range of 0 to 3L/hr. By controlling the spraying mode of the spray head, the optical film 101 can be sprayed at a single designated position.

The opening and closing of each individual spray head is controlled individually. Since a plurality of single heads are arranged in the web direction, optical films of different widths can be accommodated by individually controlling the on and off of each single head.

As shown in fig. 1, the apparatus for improving the surface resistance of an optical film further includes a mask portion 105, the mask portion 105 defining an inner space, and the painting portion 102 being located in the inner space of the mask portion 105 such that the mask portion 105 surrounds the painting portion 102. By the mask portion 105 surrounding the painting portion 102, it is possible to prevent the peripheral air flow from affecting the painting process, and to block the surface resistance improving liquid splashed during the painting process.

The hood portion 105 includes an air exhaust device and a drainage groove. Because the liquid drops can be generated after the spray mist is condensed in the spraying process, the liquid drops can be prevented from dropping through the mutual matching of the exhaust device and the drainage groove.

As shown in fig. 1, the device for improving the surface resistance of the optical film further includes a receiving portion 106, the receiving portion 106 is located below the spraying portion 102, and the receiving portion 106 is located below a second surface of the optical film 101 facing away from the spraying portion 102. The receiving portion 106 located below the spraying portion 102 and the second surface of the optical film 101 can receive an excess surface resistance improving liquid that is not sprayed onto the optical film 101 during spraying, and can receive an excess surface resistance improving liquid that flows down from the optical film 101.

The wiping section 102 includes a wiping rod extending in the web direction and a wiping cloth surrounding the wiping rod. The wiping rod moves up and down, and when the wiping rod is pressed down, the wiping rod drives the wiping cloth to contact with the first surface of the optical film 101, so as to wipe off the redundant surface resistance improving liquid on the first surface of the optical film 101. The pressing pressure of the wiping rod is adjustable to accommodate optical films 101 of different thicknesses. With the wiping rod extending in the web direction and the wiping cloth surrounding the wiping rod, full coverage wiping in the single-sided web direction of the optical film 101 can be achieved.

The drying unit 104 supplies normal-temperature purified air or warm purified air, and rapidly dries the first surface of the optical film 101 by accelerating convection of ambient air. The air supply pressure to the dryer section 104 is adjustable to accommodate different drying times. The drying section 104 can perform full-coverage drying of the optical film 101 in the single-side web direction.

The apparatus for improving the surface resistance of the optical film further includes a plurality of guide rollers that guide the optical film 101 to flow in the flow direction. As shown in fig. 1, the flow direction may be understood as a length direction of the optical film 101. The plurality of guide rollers controls the tension of the flowing optical film 101 to be 0 to 300N, preferably 50 to 200N, and controls the flow speed of the flowing optical film 101 to be 0 to 30m/min, preferably 5 to 15 m/min. It is understood that the tension and the flowing speed of the flowing optical film 101 may be adjusted according to actual needs, and are not limited thereto.

As shown in fig. 1, the plurality of guide rollers includes a first guide roller 107 and a second guide roller 108. The first guide roller 107 is located in front of the painting section 102 to guide the optical film 101 into the painting section 102. The second guide roller 108 is located below the wiping section 102, and the relative position between the second guide roller 108 and the wiping rod is adjustable, and preferably the second guide roller 108 is located directly below the wiping section 102, and cooperates with the wiping rod pressed downward to achieve an optimal wiping effect on the optical film 101. It is understood that the number of the guide rollers can be adjusted according to actual needs, and is not limited herein.

The apparatus for improving the surface resistance of the optical film further includes a wind-out roller which is positioned in front of the first guide roller 107 and winds out the optical film 101. The entire roll of the optical film 101 can be unwound by the unwinding roller to improve the surface resistance of the optical film 101.

The apparatus for improving the surface resistance of the optical film further includes a winding roller which is located behind the second guide roller 108 and winds the dried optical film 101. The optical film 101 with improved surface resistance can be wound into a roll by a winding roll for storage, packaging and/or subsequent processing.

It is to be noted that in the claims and the description of the present patent, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.

Claims (21)

1. An apparatus for improving the surface resistance of an optical film, the apparatus comprising:

a spraying section that sprays the surface resistance improving liquid to the optical film;

a wiping unit that wipes the optical film after the spraying;

a drying section that dries the optical film after the wiping.

2. The apparatus of claim 1, wherein the spray section comprises one or more nozzle groups, each nozzle group comprising a plurality of single nozzles arranged in the web direction.

3. The apparatus of claim 2, wherein each single spray head is controlled to spray continuously or intermittently with adjustable on-off time.

4. A device according to any of claims 2-3, wherein the opening and closing of each single spray head is controlled individually.

5. The apparatus of any one of claims 1-3, further comprising:

a shroud portion surrounding the spray portion.

6. The device of claim 5, wherein the mask portion includes a venting device and a drainage channel.

7. The apparatus of any one of claims 1-3, further comprising:

the bearing part is positioned below the spraying part.

8. The apparatus of claim 5, further comprising:

the bearing part is positioned below the spraying part.

9. A device according to any one of claims 1-3, characterised in that the wiping part comprises a wiping rod and a wiping cloth extending in the web direction.

10. The device according to claim 5, characterized in that the wiping part comprises a wiping rod and a wiping cloth extending in the web direction.

11. The device according to claim 7, characterized in that the wiping part comprises a wiping rod and a wiping cloth extending in the web direction.

12. The device of any one of claims 1-3, wherein the drying section provides normal temperature purified air or warm purified air.

13. The apparatus of claim 5, wherein the drying section provides normal temperature purified air or warm purified air.

14. The apparatus of claim 7, wherein the drying section provides normal temperature purified air or warm purified air.

15. The apparatus of claim 9, wherein the drying section provides normal temperature purified air or warm purified air.

16. The apparatus of any one of claims 1-3, further comprising:

a plurality of guide rollers that guide the optical film to flow in a flow direction.

17. The apparatus of claim 5, further comprising:

a plurality of guide rollers that guide the optical film to flow in a flow direction.

18. The apparatus of claim 7, further comprising:

a plurality of guide rollers that guide the optical film to flow in a flow direction.

19. The apparatus of claim 9, further comprising:

a plurality of guide rollers that guide the optical film to flow in a flow direction.

20. The apparatus of claim 12, further comprising:

a plurality of guide rollers that guide the optical film to flow in a flow direction.

21. The apparatus according to claim 16, wherein the plurality of guide rollers controls a tension of the flowing optical film to be 0 to 300N, and controls a flow speed of the flowing optical film to be 0 to 30 m/min.

Images