CN216083156U - Laminated sheet for optical film - Google Patents

Abstract

The utility model relates to a bonding sheet for an optical film, which is suitable for adsorbing the optical film and comprises a body and a microstructure layer arranged on the top surface of the body. The body includes a bottom surface, and a top surface located on an opposite side of the bottom surface. The microstructure layer comprises an adhesion surface which is far away from the top surface and is suitable for contacting the optical film, and a plurality of concave parts which are mutually and alternately concave inwards from the adhesion surface and are used for shrinking when an external force is applied to make the adhesion surface uniformly attached to the optical film. Through the arrangement of the adhesion surface and the concave part, the flatness and the adhesion precision of the optical film can be improved, the generation of adhesion bubbles and indentation lines is reduced, and the yield of an adhesion process can be improved.

Description

Laminated sheet for optical film

Technical Field

The present invention relates to a bonding sheet, and more particularly to a bonding sheet for an optical film.

Background

Referring to fig. 1, a conventional bonding apparatus 7 disclosed in patent publication No. 297835 is adapted to adsorb and fix a flexible substrate 8 and enable the flexible substrate 8 to be bonded to a glass substrate, and includes a substrate 71 having a mounting surface 711, six suction cups 72 disposed on the mounting surface 711 of the substrate 71 at intervals and adapted to fix the flexible substrate 8, and a vacuum generator 73 disposed on the substrate 71 and adapted to provide suction force to the suction cups 72. When the flexible base material 8 is bonded to the glass substrate, the operator first actuates the vacuum generator 73 to generate suction force by the suction pad 72 to fixedly suck the flexible base material 8, and the flexible base material 8 is stably conveyed to a position where the glass substrate is to be bonded to perform a bonding operation.

However, the suction force generated by the vacuum generator 73 is used to suck and fix the flexible substrate 8 through the suction cups 72, so that the portion of each suction cup 72 contacting the flexible substrate 8 is easily affected by the suction force and is recessed downward, and when the flexible substrate 8 is attached to the glass substrate, the portion of each suction cup 72 contacting the flexible substrate 8 is easily subjected to a problem of air bubble attachment or crease attachment, and thus the conventional attaching device 7 is still to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a bonding sheet for an optical film.

The utility model relates to a bonding sheet for an optical film, which is suitable for adsorbing the optical film and comprises a body and a microstructure layer arranged on the top surface of the body.

The body includes a bottom surface, and a top surface located on an opposite side of the bottom surface.

The microstructure layer comprises an adhesion surface which is far away from the top surface and is suitable for contacting the optical film, and a plurality of concave parts which are mutually and alternately concave inwards from the adhesion surface and are used for shrinking when an external force is applied to make the adhesion surface uniformly attached to the optical film.

The purpose of the utility model and the technical problem solved by the utility model can be further realized by adopting the following technical measures.

Preferably, the body is made of one of stainless steel, metal aluminum, polyethylene, polypropylene, acryl, polyester fiber cloth, nylon cloth, fiber mesh cloth, or PET dust-free cloth.

Preferably, the thickness of the body is between 0.01 mm and 1 mm.

Preferably, the adhesive sheet for an optical film is formed by one of silicone rubber, PVC rubber, OCA rubber, and AB blend rubber.

Preferably, the thickness of the microstructure layer is between 1 micron and 500 microns.

Preferably, the shape of each recess is one of an L-shape, a cross-shape, a long-strip shape, a circular shape, or an elliptical shape.

Preferably, the above-mentioned attaching sheet for an optical film further includes a plurality of fixing holes respectively disposed on both sides of the body and penetrating through the top surface and the bottom surface.

The utility model has the beneficial effects that: through the adhesion surface and the structural design of the concave part, the adhesion surface is completely and uniformly attached to the optical film, so that the situation that the optical film is concave towards the microstructure layer can be avoided, and the production yield of subsequent processes is improved.

Drawings

FIG. 1 is a plan view illustrating a prior art bonding apparatus;

FIG. 2 is a top view illustrating one embodiment of the present novel conformable sheet for use in optical films;

FIG. 3 is a partial cross-sectional view illustrating the relative relationship of the components of the embodiment;

FIG. 4 is a top view illustrating the shape and arrangement of an adhesive surface and a plurality of recesses according to the embodiment;

FIG. 5 is a top view illustrating another structural aspect of the adhesive surface and the recessed portion of the embodiment;

FIG. 6 is a schematic diagram illustrating the use of the embodiment;

FIG. 7 is a schematic view illustrating a state in which each of the depressions of the embodiment is contracted by an external force; and

FIG. 8 is a schematic view illustrating another variation of a body in the embodiment.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Referring to fig. 2 and 3, in an embodiment of the present invention, the present embodiment is adapted to adsorb an optical film 9, and includes a body 1, a microstructure layer 2 disposed on the body 1, and a plurality of fixing holes 3 respectively disposed on two sides of the body 1. It should be noted that the above embodiment is disposed in an attaching machine, and the optical film 9 is fixed flatly, so that the optical film 9 is not easy to generate bubbles, creases or start line indentation bubble lines when attached to a glass substrate.

In the embodiment, the optical film 9 is illustrated by a polarizing plate, but may be a wide viewing film, an optical compensation film, an optical brightness enhancement film, a PE protection film …, and the like, but not limited thereto.

The body 1 includes a bottom surface 11 and a top surface 12 opposite to the bottom surface 11. The body 1 is made of one of stainless steel, metal aluminum, polyethylene, polypropylene or acryl, and has a thickness ranging from 0.01 mm to 1 mm, preferably, from 0.05 mm to 0.3 mm, when the body 1 is too thin, the body has a disadvantage of insufficient mechanical strength, and when the body is too thick, the body is not easily bent by external force, thereby being disadvantageous to subsequent process operations. In this embodiment, the body 1 is a stainless steel plate with a thickness of 0.05 mm.

The microstructure layer 2 includes an adhesion surface 21 away from the top surface 12 and adapted to contact the optical film 9, and a plurality of recesses 22 recessed inward from the adhesion surface 21 at intervals. The micro-structure layer 2 is made of one of silica gel, PVC glue, OCA glue, rubber or AB mixed glue, and has a thickness of 1 to 500 micrometers, and preferably, the micro-structure layer 2 is made of silica gel and has a thickness of 50 micrometers. In addition, the area of the microstructure layer 2 is smaller than that of the body 1, so as to leave areas for respectively arranging the fixing holes 3 on two sides of the body 1, and the area of the microstructure layer 2 can be adjusted according to the size of the optical film 9, and the optical film 9 mainly needs to be completely attached to the microstructure layer 2.

Referring to fig. 4 and 5 in conjunction with fig. 3, the microstructure layer 2 is formed on the top surface 12 of the body 1 by spraying, and the recesses 22 are formed in the shape of each recess 22 by gravure printing, each recess 22 is in the shape of one of an L, a cross, a strip, a circle, or an ellipse, and every two adjacent recesses 22 are connected or not connected to each other. In fig. 4, each of the recesses 22 is circular and arranged in an array, and in fig. 5, each of the recesses 22 is elongated and arranged in a staggered manner. The shape of the adhesive surface 21 is different from that of each of the recesses 22, for example, in a top view of fig. 4, the adhesive surface 21 is composed of a plurality of circular shapes, and in a top view of fig. 5, the adhesive surface is composed of a plurality of diamond shapes, but the implementation is not limited thereto.

Specifically, when the optical film 9 is attached to the glass substrate, the protective film of the optical film 9 is firstly torn off and then attached to the glass substrate. Therefore, the adhesion force provided by the adhesion surface 21 and the adsorption force provided by the concave portion 22 need to be greater than the force for tearing off the protective film of the optical film 9, so as to avoid the situation that the optical film 9 is taken away from the original fixed position and poor adhesion occurs in the process of tearing off the protective film.

Referring to fig. 2 and 3 again, the fixing holes 3 are respectively disposed on two sides of the body 1 and penetrate through the top surface 12 and the bottom surface 11. In the embodiment, the number of the fixing holes 3 is eight, and four fixing holes are respectively arranged on two sides of the body 1. The fixing holes 3 mainly allow the body 1 to be fixed on the attaching machine, and the number of the fixing holes 3 is correspondingly adjusted according to actual fixing requirements, but not limited thereto.

Referring to fig. 6 to 8, in use, an operator first uses a plurality of locking members to respectively pass through the fixing holes 3 (only one is shown in fig. 6 due to the view angle), so as to screw the main body 1 to the attaching machine, transport the optical film 9 to the right above the main body 1, align the optical film 9 with the position of the microstructure layer 2, and then roll the bottom surface 11 of the main body 1 by using a roller, at this time, the adhesive surface 21 is pressed to extend and retract towards the concave portions 22, so as to force each concave portion 22 to contract and deform inward, so that the air originally located in each concave portion 22 is exhausted, that is, the optical film 9 and each concave portion 22 are in an airtight state, thereby providing an absorbing force for evenly absorbing the optical film 9, and matching with the adhesive force provided by the adhesive surface 21 itself due to the material, the optical film 9 can be smoothly attached, and the situation that the optical film 9 is sunken towards the microstructure layer 2 can be reduced. In addition, the arrangement of the uniformly distributed recesses 22 not only can provide a uniform adsorption force for adsorbing the optical film 9, but also can provide a space for the adhesive surface 21 to expand and contract when the adhesive surface 21 is pressed by an external force, so that the problem of unevenness when the adhesive surface 21 is adhered to the optical film 9 due to the protrusion of the adhesive surface 21 can be avoided.

As shown in an embodiment of fig. 8, in the embodiment, the material of the main body 1 may also be one of polyester fiber cloth, nylon cloth, fiber mesh cloth or PET dust-free cloth, so that an operator can select and change the material according to actual working environment and conditions, and the material has better applicability.

Claims (7)

1. A laminated sheet for an optical film, which is suitable for an adsorption optical film, is characterized in that: the conformable sheet for an optical film comprises:

the body comprises a bottom surface and a top surface positioned on the opposite side of the bottom surface; and

the micro-structure layer is arranged on the top surface of the body, comprises an adhesion surface which is far away from the top surface and is suitable for contacting the optical film, and a plurality of concave parts which are mutually inwards concave from the adhesion surface at intervals and are used for enabling the adhesion surface to be uniformly attached to the optical film by contraction when external force is applied.

2. The conformable sheet for optical films according to claim 1, characterized in that: the body is made of one of stainless steel, metallic aluminum, polyethylene, polypropylene, acryl, polyester fiber cloth, nylon cloth, fiber mesh cloth or PET dust-free cloth.

3. The conformable sheet for optical films according to claim 1, characterized in that: the thickness of the body is between 0.01 mm and 1 mm.

4. The conformable sheet for optical films according to claim 1, characterized in that: the micro-structure layer is made of one of silica gel, PVC (polyvinyl chloride) glue, OCA (optical clear adhesive), rubber or AB mixed glue.

5. The conformable sheet for optical films according to claim 1, characterized in that: the thickness of the microstructure layer is between 1 micron and 500 microns.

6. The conformable sheet for optical films according to claim 1, characterized in that: each of the recesses is shaped as one of an L-shape, a cross-shape, a bar-shape, a circular shape, or an elliptical shape.

7. The conformable sheet for optical films according to claim 1, characterized in that: the fixing device is characterized by further comprising a plurality of fixing holes which are respectively arranged on two sides of the body and penetrate through the top surface and the bottom surface.

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