WO2022016723A1

WO2022016723A1 - Preparation method for optically clear adhesive (oca) having round hole with light-shading black edge, and die-cutting apparatus therefor

Info

Publication number: WO2022016723A1
Application number: PCT/CN2020/124084
Authority: WO
Inventors: 唐浩成; 黄秋敏; 李保国
Original assignee: 太仓展新胶粘材料股份有限公司
Priority date: 2020-07-22
Filing date: 2020-10-27
Publication date: 2022-01-27
Also published as: CN111730681A; CN111730681B

Abstract

A preparation method for an optically clear adhesive (OCA) having a round hole with a light-shading black edge, the method comprising the following steps: step one, attaching an OCA adhesive tape to a carrier tape; step two, performing die cutting, waste discharging and attaching on a light-shading adhesive tape; step three, performing die cutting and waste discharging on an optically clear adhesive (OCA) product; step four, performing fool-proofing detection; step five, discharging waste from a round hole and discharging air from a cross-shaped through hole of the round hole; and step six, performing final attaching, slicing and discharging. The present invention further relates to a die-cutting apparatus for an optically clear adhesive (OCA) having a round hole with a light-shading black edge. By means of the preparation method and the apparatus, the problem of light leakage at an edge of a through hole of a polarizer in an electronic product with an under-screen camera is solved, and the yield and the production efficiency of an optically clear adhesive (OCA) are improved.

Description

Preparation method and die-cutting device of OCA optical adhesive with round hole and black edge

technical field

The invention relates to the technical field of optical adhesive production technology, in particular to a preparation method of an OCA optical adhesive with a round hole and a light-shielding black edge and a die-cutting device for preparing the above-mentioned OCA optical adhesive.

Background technique

OCA optical adhesive is one of the important raw materials of touch screen. It is obtained by making optical acrylic adhesive without substrate, and then laminating a layer of release film on the upper and lower bottom layers. It is a double-sided lamination without substrate material. adhesive tape. OCA optical adhesive is the best adhesive for touch screen, its main uses are: lamination on electronic paper, transparent device bonding, projection screen assembly, aerospace or military optical device assembly, display assembly, lens assembly, resistive touch screen G Lamination of +F+F, F+F, capacitive touch screen, panel, ICON and plastic materials such as glass and polycarbonate is a special adhesive for bonding transparent optical components (such as lenses, etc.).

The existing OCA optical adhesive structure is a single-layer whole-piece high-transparency product, with a light transmittance of over 92%. With the continuous development of technology, under-screen cameras in electronic products will gradually become popular and become the mainstream. In order to meet the needs of the under-screen camera, it is necessary to punch through holes on the existing polarizer, but when the screen emits light, there will be light leakage at the edges of the through holes of the polarizer.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a method for preparing an OCA optical adhesive with a round hole and a black edge. The problem of light leakage at the edge of the through hole; at the same time, the preparation method improves the yield and production efficiency of the OCA optical adhesive.

In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions:

A first aspect of the present invention provides a method for preparing an OCA optical adhesive with a shading black edge in a round hole, comprising the following steps:

Step 1, providing a carrier tape and an OCA tape, the heavy film surface of the OCA tape is attached to the carrier tape, and the original light film on the OCA tape is excluded;

Step 2, provide a light-shielding tape consisting of a base film and a light-shielding adhesive layer, and half-cut the light-shielding tape on the base film, so that a pair of oppositely arranged T-shaped foolproof areas are formed on the light-shielding tape. The circular shading area between the dead areas, and the position of two adjacent pairs of T-shaped shading areas and the size of the circular shading area are designed according to the dimensional tolerance of the OCA optical adhesive product; then exclude the T-shaped foolproof area and the circular shading area. Surrounding waste, and the glue surface of described shading tape is attached to the surface of OCA tape;

Step 3: Cut the OCA tape into a predetermined width, and the cutting depth is on the carrier tape; in the area between the adjacent two pairs of T-shaped foolproof areas, the outer contour and the circular hole of the OCA optical adhesive are formed by cutting, and the cutting depth is On the heavy film; then remove the frame waste of the base film of the shading tape, the frame waste of the OCA tape and the waste around the outer contour, thereby obtaining the OCA optical glue semi-finished product on the heavy film;

Step 4. Detect whether there is light-shielding glue at the four corners of the semi-finished OCA optical glue, if so, stop the machine to check; if not, remove the circular waste glue in the round hole, and punch the exhaust cross line in the round hole;

Step 5. Attach another light film to the surface of the OCA optical adhesive semi-finished product, and then half-cut it on the carrier tape between two adjacent OCA optical adhesive semi-finished products, and then remove the carrier tape to obtain the round hole tape shading black Finished OCA optical glue on the side.

Further, in step 4, observe whether there is light-shielding glue at the four corners of the semi-finished OCA optical glue through visual inspection or a magnifying glass.

Further, in step 4, the circular waste glue in the circular hole is extracted by the waste extraction block, and then transferred to the waste discharge tape to be drained away.

Further, in step 4, the waste-lifting block is cylindrical, and its diameter is at least 1 mm smaller than the diameter of the circular hole, and the top of the waste-lifting block is cut into the circular waste rubber by 5-10 μm when the waste is lifted.

Further, in step 4, the peripheral edge of the top end of the waste lifting block is chamfered.

Further, in step 4, the exhaust cross line is located in the center of the circular hole, and cuts through the heavy film under the OCA adhesive layer.

A second aspect of the present invention provides a die-cutting device for OCA optical adhesive with round holes and black edges, which is characterized by comprising: a frame and an OCA tape discharging mechanism, a carrier tape discharging mechanism arranged on the frame, and a Feeding mechanism, the first composite roller, the original light film waste discharge mechanism, the shading tape discharge mechanism, the shading tape die-cutting mechanism, the shading tape waste discharge mechanism, the second composite roller, the OCA tape die-cutting mechanism, the shading bottom film row Waste mechanism, frame waste discharge mechanism, fool-proof detection mechanism, waste lifting mechanism, cross-hair cutting and piercing mechanism, delivery light film discharging mechanism, third composite roller, pull-to-roll, finished die-cutting mechanism and carrier tape waste disposal agency;

The OCA tape discharging mechanism and the carrier tape discharging mechanism are respectively used for the discharging of the OCA tape and the carrier tape. The original light film waste discharge mechanism is used to rewind the original light film on the surface of the OCA tape, the shading tape unwinding mechanism is used for unwinding the shading tape, and the shading tape die-cutting mechanism is used to cut the shading tape to form a pair of The oppositely arranged T-shaped foolproof area and a circular shading area, the shading tape waste discharge mechanism is used to remove the waste around the T-shaped foolproof area and the circular shading area on the shading tape, and the second composite roller is used for To attach the adhesive surface of the shading tape to the surface of the OCA tape;

The OCA tape die-cutting mechanism is used to cut the OCA tape into a predetermined width, and cut the outer contour and round holes of the OCA optical adhesive in the area of two adjacent pairs of T-shaped foolproof intervals to obtain the semi-finished product of the OCA optical adhesive; The shading bottom film waste discharge mechanism is used to remove the base film of the shading tape, and the frame waste waste discharge mechanism is used to remove the frame waste of the OCA tape and the waste around the outer contour of the OCA optical adhesive;

The fool-proof detection mechanism is used to detect whether there is light-shielding glue at the four corners of the semi-finished OCA optical glue, the waste removal mechanism is used to extract the circular waste glue in the circular hole and put them away, and the cross line cutting through mechanism is used for Cut the exhaust reticle in the round hole after the waste discharge and cut through the heavy film;

The unloading mechanism for the unloading light film is used for unloading another light film, the third compounding roller is used for compounding the other light film on the surface of the semi-finished OCA optical adhesive, and the pulling material roller is used for The tape is driven to travel, the finished product die-cutting mechanism is used to cut between two adjacent semi-finished OCA optical adhesive products onto the carrier tape, and the carrier tape waste discharge mechanism is used to rewind the carrier tape.

Further, the waste-lifting mechanism comprises a waste-discharge tape discharge shaft, a waste-discharge tape take-up shaft, a rotatable waste-lifting fixture and a waste-lifting block fixed on the surface of the waste-lifting fixture installed on the rack; The waste-lifting block is rotated under the drive of the waste-lifting jig. During the rotation, the top of the waste-lifting block contacts and takes away the circular waste glue in the circular hole, and the extracted circular waste glue Then, it comes into contact with the waste discharge tape arranged on the discharge shaft of the waste discharge tape and the discharge shaft of the waste discharge tape, so as to be transferred to the waste discharge tape and discharged.

According to further, the waste removal block is cylindrical, its diameter is at least 1 mm smaller than the diameter of the OCA optical glue round hole, and the height is 5-10 μm cut into the round hole waste glue.

Further, the peripheral edge of the top end of the waste lifting block is chamfered.

The beneficial effects of the present invention are:

1. The present invention introduces a light-shielding tape in the preparation process of the OCA optical adhesive, and forms a T-type fool-proof area and a round hole light-shielding area by die-cutting on the adhesive layer of the light-shielding tape, and two adjacent pairs of the T-type fool-proof area are formed. The position and the size of the circular shading area are designed according to the dimensional tolerance of the finished OCA optical adhesive; after the die-cut shading tape is attached to the OCA tape, the OCA optical adhesive is cut in the area of the adjacent two pairs of T-shaped foolproof areas. For the outer contour and round holes, the position of the round holes on the OCA optical glue can be judged by judging whether there is shading glue at the four corners of the semi-finished OCA optical glue. The fool-proof design not only greatly simplifies the product inspection steps, but also can adjust the process in time parameters, thereby helping to improve the production efficiency and yield of OCA optical adhesives.

2. The OCA optical adhesive with round holes and black edges prepared by the present invention can overcome the problem of light leakage at the edge of the through hole of the polarizer in electronic products with under-screen cameras.

Description of drawings

Fig. 1 is the schematic diagram of the OCA optical adhesive finished product of the present invention's circular hole with shading black edge;

Fig. 2 is the die-cutting process flow chart of the present invention;

Fig. 3 is the schematic diagram of the T-shaped foolproof area and the round hole shading area on the shading tape;

Fig. 4 is the cut schematic diagram of die cutting in step 3;

Fig. 5 is an enlarged view of the waste lifting block and its part.

detailed description

The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As mentioned in the background art, with the continuous development of science and technology, the under-screen camera in electronic products will gradually become popular and become the mainstream. In order to meet the needs of the under-screen camera, it is necessary to punch through holes on the existing polarizer, but when the screen emits light, there will be light leakage at the edges of the through holes of the polarizer.

In order to solve this technical problem, the present invention provides an OCA optical adhesive with a round hole and a black edge for shading. As shown in FIG. 1 , the OCA optical adhesive is in the shape of a rectangle with rounded corners as a whole, and a circular hole is opened near the top. There is a ring of black shading glue around the hole. The black light-shielding glue on the circumference of the circular hole can effectively solve the light leakage phenomenon at the edge of the through hole of the polarizer.

For the OCA optical adhesive with a black edge for shading in the round hole, the conventional positioning sleeve cutting process is generally adopted in the prior art, which requires separate die-cutting in steps, and the yield and production efficiency are low, which cannot meet the needs of customers. Therefore, the inventor has provided a new die-cutting process after long-term research. Below in conjunction with accompanying drawing 2, the die-cutting process of this OCA optical adhesive is specifically described:

Step 1. Lamination of OCA tape and carrier tape:

First, the OCA tape is discharged through the OCA tape discharge shaft L1, and the carrier tape is discharged through the carrier tape discharge shaft L2, and the two are attached at the G1 axis, so that the heavy film surface of the OCA tape is attached to the carrier. Tape; then, take up the original light film on the OCA tape by the original light film take-up reel U1.

This part determines the load-bearing capacity of the entire process of OCA tape. To control the bonding tension and pressure between the two, it will affect the glue length and warpage of the final product. A pressure sensor display can be installed at the corresponding position, and the tightness of the OCA tape and the process carrier tape can be controlled by the pressure of the roller.

Step 2. Die-cutting, waste removal and lamination of shading tape:

First, the light-shielding tape is discharged through the light-shielding tape discharge shaft U3, wherein the light-shielding tape is composed of a base film and a light-shielding adhesive layer. A pair of oppositely arranged T-shaped foolproof areas and a circular shading area located between the pair of T-shaped foolproof areas are formed on the shading tape, and the positions of the two adjacent pairs of T-shaped foolproof areas and the size of the circular shading areas are formed. It is designed according to the dimensional tolerance of OCA optical adhesive products.

The shape and position of the T-shaped foolproof area and the round hole shading area on the shading tape are shown in Figure 3. The positions of the two adjacent pairs of T-shaped foolproof areas and the size of the circular shading area are subject to the dimensional tolerance of the finished OCA optical adhesive. Design means that the size of the square area defined by the adjacent two pairs of T-shaped foolproof areas is determined according to the outline size of the finished OCA optical adhesive, and a certain margin is reserved. For example, the width and length of the finished OCA optical adhesive are x and y respectively, and the dimensional margins reserved on each side in the width direction and length direction are Δx and Δy respectively, then it can be determined that the two adjacent pairs of T-shaped foolproof areas are limited by The width of the square area is x+2Δx and the length is y+2Δy. In the same way, the diameter of the circular shading area is also determined according to the diameter of the circular hole on the finished OCA optical adhesive plus a certain margin.

Then, remove the waste around the T-shaped foolproof area and the circular shading area on the shading tape, and rewind it on the shading tape waste discharge shaft U2; then at the G2 axis, the glue surface of the shading tape is attached to the surface of the OCA tape. Specify the shading position. The self-contained base film of the shading tape is not directly excluded, but is removed after die-cutting in step 3. In this process, the self-contained base film can play a role in protecting the surface of the colloid.

Step 3. Die-cutting and waste disposal of OCA optical adhesive products:

First, after the OCA tape passes through the G3 axis, it is die-cut by the OCA tape die-cutting mechanism D2 at the G4 axis. Specifically, a cutting knife is used to cut the OCA tape into a predetermined width, and the cutting depth is on the carrier tape; use another cutter The outer contour and round hole of the OCA optical adhesive are formed by cutting in the area between the adjacent two pairs of T-shaped foolproof areas, and the cutting depth is on the heavy film. The shape and position of the incision of this step die-cutting are shown in Figure 4 .

Next, remove the bottom film of the shading tape, and rewind it on the shading bottom film reel U4; then remove the frame waste of the OCA tape and the waste around the outer contour of the OCA optical adhesive, and rewind it on the frame waste glue reel U5 , so as to obtain the semi-finished OCA optical adhesive on the heavy film.

Step 4. Fool-proof detection:

Detect whether there is shading glue at the four corners of the cut OCA optical glue semi-finished product, and the detection methods include but are not limited to visual inspection, magnifying glass M observation, etc. Since the shading glue is generally black, when the OCA optical glue is die-cut in the previous step, if the cutter cuts to the T-shaped foolproof area, there will inevitably be black edges at the four corners of the semi-finished OCA optical glue, and it can be easily removed. observed. Therefore, when it is detected that there are black edges at the four corners of the semi-finished product of OCA optical adhesive, it means that the position of the round hole is NG (unqualified), and it is necessary to stop the inspection and reset the die-cutting parameters; Then continue to the next step to remove the circular waste glue in the circular hole.

Step 5. Round hole exhaust and round hole cross hole exhaust:

First of all, when the OCA tape passes through the G5 axis, the round hole is discarded. The round hole waste removal is carried out by a waste removal mechanism. The waste removal mechanism includes a waste discharge tape discharging shaft U7, a waste discharge tape receiving shaft U6, a rotatable waste lifting fixture D3, and a lifting fixture fixed on the surface of the waste lifting fixture D3. waste block. The principle of waste removal is: the waste removal block rotates under the drive of the waste removal fixture D3. During the rotation, the top of the waste removal block contacts and takes away the circular waste glue in the round hole, and the extracted circular waste The glue is then contacted with the waste discharge tape disposed on the waste discharge tape discharge shaft U7 and the waste discharge tape take-up shaft U6, so as to be transferred to the waste discharge tape to be discharged.

The structure of the waste-lifting block is shown in Figure 5. The whole is cylindrical, and its diameter is preferably at least 1mm smaller than the diameter of the OCA optical glue round hole. When the size is too large, it will affect the colloid at the edge of the round hole, and the contact area is too small. Glue cannot be extracted. The height of the waste lifting block is designed to cut into the round hole waste glue 5-10 μm. If the cutting is too deep, the heavy film of the lower layer of the colloid will be deformed. Preferably, the peripheral edge of the top end of the waste-lifting block is provided with a chamfer, and the chamfer first contacts the adhesive layer during the waste-lifting, so as to prevent the waste-lifting block from damaging the adhesive layer.

The waste OCA tape continues to travel to the G6 axis. When the cross line cuts through the mechanism D4, the exhaust cross line is cut by the cutter. The cross line is located in the center of the round hole, and it needs to cut through the heavy film to form ventilation with the outside world. If the heavy film is not cut through, the light film and the heavy film at the round hole will form a closed air layer, and the outside air pressure will squeeze here, which will cause the colloid to overflow around the round hole.

Step 6. Finally, fit the slices and produce the slices:

First, discharge the other light film through the unloading shaft U9 of the light film, exclude the protective film on its surface and wind it on the light film protective film take-up shaft U8, and then stick the light film at the G7 axis. It is attached to the glue surface of the semi-finished OCA optical glue.

Then, it is sent to the G9 axis through the G8 pulling shaft, and when passing through the finished product die-cutting mechanism D5, the cutter is half-cut between the adjacent two OCA optical adhesive semi-finished products to the carrier tape, and then the carrier tape is removed and wound on the carrier tape. On the material shaft D4, the finished OCA optical adhesive with a round hole and a light-shielding black edge is obtained, as shown in FIG. 1 .

The present invention also discloses a die-cutting device for die-cutting the above-mentioned OCA optical adhesive with shading black edges. Tape feeding shaft L1, carrier tape feeding shaft L2, first composite roller (G1 shaft), original light film feeding shaft U1, shading tape feeding shaft U3, shading tape die-cutting mechanism D1, shading tape waste discharge shaft U2, the second composite roller (G2 axis), the OCA tape die-cutting mechanism D2, the shading bottom film receiving shaft U4, the frame waste glue receiving shaft U5, the foolproof detection mechanism, the waste lifting mechanism, and the cross line cutting through mechanism D4 , the third composite pair of rollers (axis G7), the light film unwinding shaft U9 for shipping, the light film receiving shaft U8 for shipping, the pull-to-roller (axis G8), the finished product die-cutting mechanism D5 and the carrier tape take-up shaft D4 . Wherein, the fool-proof detection mechanism can be a magnifying glass M, and the waste removal mechanism includes a waste discharge tape discharging shaft U7, a waste discharge tape receiving shaft U6, a rotatable waste lifting fixture D3, and a Lift the waste block (see Figure 5).

The structures and functions of the above components have been described in detail above, and will not be repeated here.

The above-mentioned embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions made by those skilled in the art on the basis of the present invention or

Claims

A method for preparing an OCA optical adhesive with a shading black edge in a circular hole, comprising the following steps:

Step 1, providing a carrier tape and an OCA tape, the heavy film surface of the OCA tape is attached to the carrier tape, and the original light film on the OCA tape is excluded;

Step 2, provide a light-shielding tape consisting of a base film and a light-shielding adhesive layer, and half-cut the light-shielding tape on the base film, so that a pair of oppositely arranged T-shaped foolproof areas are formed on the light-shielding tape. The circular shading area between the dead areas, and the position of two adjacent pairs of T-shaped shading areas and the size of the circular shading area are designed according to the dimensional tolerance of the OCA optical adhesive product; then exclude the T-shaped foolproof area and the circular shading area. Surrounding waste, and the glue surface of described shading tape is attached to the surface of OCA tape;

Step 3: Cut the OCA tape into a predetermined width, and the cutting depth is on the carrier tape; in the area between the adjacent two pairs of T-shaped foolproof areas, the outer contour and the circular hole of the OCA optical adhesive are formed by cutting, and the cutting depth is On the heavy film; then remove the frame waste of the base film of the shading tape, the frame waste of the OCA tape and the waste around the outer contour, thereby obtaining the OCA optical glue semi-finished product on the heavy film;

Step 4: Detecting whether there is shading glue at the four corners of the semi-finished OCA optical glue, if so, stop the machine for inspection; if not, remove the circular waste glue in the round hole, and punch the exhaust cross line in the round hole;

Step 5. Attach another light film to the surface of the OCA optical adhesive semi-finished product, and then half-cut it on the carrier tape between two adjacent OCA optical adhesive semi-finished products, and then remove the carrier tape to obtain the round hole tape shading black Finished OCA optical glue on the side.
The method for preparing an OCA optical glue with a round hole with light-shielding black edges as claimed in claim 1, wherein in step 4, whether there is light-shielding glue at the four corners of the OCA optical glue semi-finished product is observed visually or with a magnifying glass.
The method for preparing OCA optical glue with a round hole with light-shielding black edge according to claim 1, wherein in step 4, the round waste glue in the round hole is extracted by a waste extraction block, and then transferred to waste disposal Drain off on tape.
The method for preparing an OCA optical adhesive with round holes with light-shielding black edges as claimed in claim 3, wherein in step 4, the waste removal block is cylindrical, and its diameter is at least 1 mm smaller than the diameter of the round hole , and the top of the waste-lifting block is cut into the circular waste rubber by 5-10 μm when the waste is lifted.
The method for preparing an OCA optical adhesive with a round hole with a light-shielding black edge according to claim 4, wherein in step 4, the peripheral edge of the top of the waste lifting block is provided with a chamfer.
The method for preparing an OCA optical adhesive with a round hole with light-shielding black edges as claimed in claim 1, wherein in step 4, the exhaust reticle is located in the center of the round hole, and cuts through the OCA adhesive layer below the OCA adhesive layer. Heavy film.
A die-cutting device for OCA optical adhesive with round holes and black edges, which is characterized in that it comprises: a frame and an OCA tape discharging mechanism, a carrier tape discharging mechanism, a first composite pair arranged on the frame Roller, original light film waste discharge mechanism, shading tape discharge mechanism, shading tape die-cutting mechanism, shading tape waste discharge mechanism, second composite roller, OCA tape die-cutting mechanism, shading bottom film waste discharge mechanism, frame waste discharge mechanism, fool-proof detection mechanism, waste lifting mechanism, cross line cutting and piercing mechanism, delivery light film discharging mechanism, third composite roller, pulling material roller, finished die-cutting mechanism and carrier tape waste discharging mechanism;

The OCA tape discharging mechanism and the carrier tape discharging mechanism are respectively used for the discharging of the OCA tape and the carrier tape. The original light film waste discharge mechanism is used to rewind the original light film on the surface of the OCA tape, the shading tape unwinding mechanism is used for unwinding the shading tape, and the shading tape die-cutting mechanism is used to cut the shading tape to form a pair of The oppositely arranged T-shaped foolproof area and a circular shading area, the shading tape waste discharge mechanism is used to remove the waste around the T-shaped foolproof area and the circular shading area on the shading tape, and the second composite roller is used for To attach the adhesive surface of the shading tape to the surface of the OCA tape;

The OCA tape die-cutting mechanism is used to cut the OCA tape into a predetermined width, and cut the outer contour and round holes of the OCA optical adhesive in the area of two adjacent pairs of T-shaped foolproof intervals to obtain the semi-finished product of the OCA optical adhesive; The shading bottom film waste discharge mechanism is used to remove the base film of the shading tape, and the frame waste waste discharge mechanism is used to remove the frame waste of the OCA tape and the waste around the outer contour of the OCA optical adhesive;

The fool-proof detection mechanism is used to detect whether there is light-shielding glue at the four corners of the semi-finished OCA optical glue, the waste removal mechanism is used to extract the circular waste glue in the circular hole and put them away, and the cross line cutting through mechanism is used for Cut the exhaust reticle in the round hole after the waste discharge and cut through the heavy film;

The unloading mechanism for the unloading light film is used for unloading another light film, the third compounding roller is used for compounding the other light film on the surface of the semi-finished OCA optical adhesive, and the pulling material roller is used for The tape is driven to travel, and the finished product die-cutting mechanism is used to cut between two adjacent semi-finished OCA optical adhesive products onto the carrier tape, and the carrier tape waste discharge mechanism is used to rewind the carrier tape.
The die-cutting device for OCA optical adhesive with a round hole and black edge for shading according to claim 7, wherein the waste removal mechanism comprises a waste discharge tape discharge shaft, a waste tape discharge shaft installed on the frame A receiving shaft, a rotatable waste lifting jig and a scrap lifting block fixed on the surface of the scrap lifting jig; the scrap lifting block rotates under the driving of the scrap lifting jig. During the rotation, the scrap lifting The top end of the block contacts and takes away the circular waste glue in the circular hole, and the extracted circular waste glue is then contacted with the waste discharge tape arranged on the waste discharge tape discharge shaft and the waste discharge tape take-up shaft, thereby It is transferred to the waste tape and drained away.
A die-cutting device for OCA optical glue with a round hole with light-shielding black edges according to claim 8, wherein the waste removal block is in the shape of a column, and its diameter is at least 1 mm smaller than the diameter of the OCA optical glue round hole, The height is 5-10 μm cut into the circular hole waste glue.
The die-cutting device for OCA optical adhesive with a round hole and black edge for light-shielding according to claim 9, wherein the peripheral edge of the top end of the waste lifting block is chamfered.