Experimental sample preparation device and sample preparation method of optical adhesive film

Abstract

The invention discloses an experimental sample preparation device for optical adhesive film, comprising a bottom box, a top surface of which is provided with a light-transmitting hole, and a cutting groove is provided on the top surface of the bottom box around the light-transmitting hole; a cutting device, comprising a pre-pressing plate and a film cutting knife, the film cutting knife is arranged on the bottom surface of the pre-pressing plate, the pre-pressing plate can move up and down, the film cutting knife faces downward and is matched with the cutting groove; an ultraviolet lamp is located in the bottom box, and the ultraviolet lamp faces upward and is faced with the light-transmitting hole. The invention can realize the sample cutting, compounding, pre-pressing and curing processes of the optical adhesive film in the same device, the operation process is convenient and fast, the structure is reasonable, the experimental efficiency is high, and the experimental effect is improved.

Description

Technical Field

[0001] The invention relates to the field of sample preparation for optical adhesive film detection experiments, and in particular to optical adhesive film experimental sample preparation equipment and a sample preparation method thereof. Background Art

[0002] Optical film cured by ultraviolet light is an electronic screen packaging film that has emerged in recent years. This optical film is a polymer hot melt film with excellent adhesion, light transmittance and processability. In order to conduct routine performance tests on the transmittance, weather resistance or peel strength of this optical film, it is necessary to prepare samples of the optical film in advance, and attach optical carrier samples, PET film samples, etc. to both sides of the optical film respectively. However, the current sample preparation process has many steps. Among them, the experimenter needs to cut and sample the optical film sample, then align and stack the multi-layer samples to achieve compounding, and then transport the sample to the laminator to pre-press the composite sample, and finally place the pre-pressed sample under ultraviolet light for curing. The above sample cutting, compounding, pre-pressing, curing and other processes all use different tools or are carried out under different equipment. The operation process is cumbersome and the experimental efficiency is low. Summary of the invention

[0003] The object of the present invention is to provide an optical film experimental sample preparation device and a sample preparation method thereof, so as to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The solution of the present invention to solve its technical problem is:

[0005] An experimental sample preparation device for optical adhesive film includes: a bottom box, the top surface of which is provided with a light-transmitting hole, and the top surface of the bottom box is provided with a groove around the light-transmitting hole; a cutting device, which includes a pre-pressing plate and a film cutting knife, the film cutting knife is arranged on the bottom surface of the pre-pressing plate, the pre-pressing plate can move up and down, the film cutting knife faces downward to the groove and matches the groove; an ultraviolet lamp, which is located in the bottom box, and the ultraviolet lamp faces upward to the light-transmitting hole.

[0006] The technical scheme has at least the following beneficial effects: the experimenter places the first transparent carrier on the bottom box and covers the light-transmitting hole, the first transparent carrier is surrounded by the cutting groove, the optical adhesive film raw material and the second transparent carrier are laid on the first transparent carrier in turn, and the first transparent carrier and the second transparent carrier are aligned with each other, the pre-pressing plate moves downward, so that the film cutting knife cuts the optical adhesive film, the pre-pressing plate continues to move downward and presses on the second transparent carrier, the downward pressed pre-pressing plate provides pre-pressure for the sample to ensure the compounding and pre-pressing of the sample, and finally turns on the ultraviolet lamp, and the ultraviolet lamp irradiates the sample through the light-transmitting hole to complete the curing and cross-linking of the optical adhesive film to the transparent carriers on both sides, thereby realizing sample preparation. The present invention can realize the cutting, compounding, pre-pressing and curing processes of the optical adhesive film in the same device, and the operation process is convenient and fast, the structure is reasonable, the experimental efficiency is high, and the experimental effect is improved.

[0007] As a further improvement of the above technical solution, the peripheral wall of the light-transmitting hole is provided with a loading step, and the loading step is made of a transparent material. The sample can be placed on the loading step, so that the light-transmitting hole can position the sample, and the cutting accuracy of the film cutting knife is improved. At the same time, the transparent loading step ensures that the ultraviolet light can irradiate the sample, and the structure is reliable.

[0008] As another improvement of the above technical solution, the cutting device includes a bracket, a driving structure and a connecting rod, the bracket is connected to the top surface of the bottom box, the driving structure is arranged on the bracket, the connecting rod is connected to the bracket in a sliding manner in the up-down direction, the driving structure can drive the connecting rod to move up-down, and the bottom surface of the connecting rod is connected to the pre-pressing plate. The pre-pressing plate is connected to the bottom surface of the connecting rod, the driving structure can drive the connecting rod to slide up-down along the bracket, and improve the movement stability of the pre-pressing plate. The pre-pressing plate acts on the sample, and can squeeze out the bubbles between the optical adhesive film and the first light-transmitting carrier and the second light-transmitting carrier, so that the two sides of the optical adhesive film are completely fitted, and the quality of the test sample is improved.

[0009] As a further improvement of the above technical solution, the driving structure includes a crossbar, a rocker, a cam and a return spring. The crossbar is rotatably connected to the bracket. The rotation axis and center line of the crossbar coincide with each other. The rocker and the cam are synchronously connected to the crossbar. The rocker extends in a direction away from the crossbar. The bottom end of the cam abuts against the connecting rod. The return spring is sleeved on the connecting rod. The upper end of the return spring is connected to the connecting rod. The lower end of the return spring is connected to the bracket. When the part of the cam in contact with the connecting rod rotates toward the distal end of the cam, the connecting rod moves downward and the return spring is gradually compressed. The user toggles the rocker to rotate the crossbar relative to the bracket and drives the cam to rotate. The distal end of the cam gradually moves toward the bottom end and pushes the connecting rod downward so that the pre-pressing plate can be pressed downward on the sample. When the user releases the rocker, the return spring returns to a natural state and lifts the connecting rod upward so that the pre-pressing plate retracts, making it convenient to take out the sample. The structure is reliable and convenient for users to use.

[0010] As another improvement of the above technical solution, a cooling channel is provided in the top plate of the bottom box, the cooling channel is arranged around the light-transmitting hole, and both ends of the cooling channel extend to the side of the top plate. A cooling medium can be introduced into the cooling channel, so that the cooling channel can cool the top plate of the bottom box to prevent the top plate temperature from being too high, which may cause the optical adhesive film to stick. At the same time, the cooling channel is arranged around the light-transmitting hole to reduce interference with the sample.

[0011] As another improvement of the above technical solution, an inspection door is provided on the side wall of the bottom box, which is convenient for installing and removing the ultraviolet lamp and for inspection, thereby improving the use effect.

[0012] The present invention also includes a method for preparing a sample of an optical adhesive film, which includes the following steps: Step 1, a light-transmitting hole is provided on the top surface of a bottom box, a loading step is provided in the light-transmitting hole, a first transparent carrier whose size matches the light-transmitting hole is placed on the loading step, and then the optical adhesive film and the second transparent carrier are sequentially laid on the first transparent carrier; Step 2, a cutting device is provided on the top surface of the bottom box, the cutting device includes a film cutting knife and a pre-pressing plate that can move up and down, the film cutting knife is connected to the bottom surface of the pre-pressing plate and faces downwardly to the cutting groove, when the pre-pressing plate moves downward, the film cutting knife can extend into the cutting groove and cut the optical adhesive film, and the pre-pressing plate and the top surface of the second transparent carrier are abutted against each other to achieve pre-pressing; Step 3, an ultraviolet lamp is provided inside the bottom box, the ultraviolet lamp is turned on and irradiated upward through the light-transmitting hole and the loading step, so as to induce the optical adhesive film to cure and cross-link and adhere the first transparent carrier and the second transparent carrier to form a test sample.

[0013] This technical solution has at least the following beneficial effects: the sample is positioned by the loading step, and then the pre-pressing plate is driven downward so that the film cutting knife can cut the excess optical adhesive film. At the same time, the downward moving pre-pressing plate squeezes out the bubbles between the first transparent carrier, the optical adhesive film and the second transparent carrier, making the three of them more tightly bonded and improving the manufacturing accuracy. Finally, the ultraviolet light is turned on to irradiate the sample in the light-transmitting hole to achieve curing and cross-linking. The present invention can realize the optical adhesive film cutting, compounding, pre-pressing and curing processes in the same device, without the need to transfer the sample to the device multiple times. The operation process is convenient and fast, the structure is reasonable, the experimental efficiency is high, and the experimental effect is improved.

[0014] As a further improvement of the above technical solution, the height of the first transparent carrier, the optical adhesive film and the second transparent carrier after being overlapped is greater than the distance from the loading step to the upper edge of the light-transmitting hole, and the bottom of the second transparent carrier is located in the light-transmitting hole. The loading step supports the sample, and the light-transmitting hole can position the first transparent carrier, the optical adhesive film and the second transparent carrier, thereby improving the cutting accuracy, reducing the occurrence of sample slippage, and reducing the interference and collision between the film cutting knife and the sample. At the same time, the top of the second transparent carrier after being overlapped is higher than the top surface height of the bottom box, ensuring that the pre-pressing plate can pre-press the sample and improve the experimental effect.

[0015] As another improvement of the above technical solution, a cooling channel is provided in the top plate of the bottom box. When the temperature of the top plate irradiated by the ultraviolet lamp exceeds a certain value, a coolant is introduced into the cooling channel to cool the top plate. The temperature of the top plate is maintained within a certain threshold range, reducing the impact of the excessive temperature of the top plate on the optical film, and improving the experimental effect and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for use in the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0017] Figure 1 is a structural diagram of an experimental sample preparation device for an optical adhesive film provided in one embodiment of the present invention;

[0018] Figure 2 is a bottom view of a pre-pressing plate provided by an embodiment of the present invention, which includes a film cutting knife;

[0019] Figure 3 It is a partial cross-sectional view of the top plate of the bottom box provided in one embodiment of the present invention.

[0020] In the accompanying drawings: 110-bottom box, 111-top plate, 112-light transmission hole, 113-cutting groove, 121-pre-pressure plate, 131-bracket, 132-connecting rod, 141-cross bar, 142-cam, 143-rocker, 144-reset spring, 150-ultraviolet lamp, 160-cooling channel, 170-inspection door, 210-film cutting knife, 310-loading step, 320-top material spring. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connecting accessories according to the specific implementation situation. The various technical features in the present invention can be combined interchangeably without conflicting with each other.

[0022] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] Reference Figure 1 and Figure 2The experimental sample preparation equipment for optical film includes a bottom box 110, a cutting device and an ultraviolet lamp 150. The top surface of the bottom box 110 is provided with a light-transmitting hole 112, and the top surface of the bottom box 110 is provided with a cutting groove 113 around the light-transmitting hole 112; the cutting device includes a bracket 131, a driving structure, a connecting rod 132, a pre-pressing plate 121 and a film cutting knife 210, and the film cutting knife 210 is arranged on the bottom surface of the pre-pressing plate 121, the bracket 131 is fixed on the top surface of the bottom box 110, the driving structure is connected to the bracket 131, and the rod body of the connecting rod 132 is connected to the bracket 131 in a sliding direction in the up and down direction. The sliding direction of the connecting rod 132 is parallel to its extension direction, and the driving structure can drive the connecting rod 132 to move up and down.

[0026] In addition, the driving structure in this embodiment includes a cross bar 141, a cam 142, a rocker 143, and a return spring 144. The cam 142 is synchronously connected to the cross bar 141. The cross bar 141 extends laterally and is rotatably connected to the bracket 131. The center line of the cross bar 141 and its rotation axis coincide with each other. One end of the rocker 143 is synchronously connected to the cross bar 141, and the other end extends in a direction away from the cross bar 141. The lower side of the connecting rod 132 is slidably connected to the bracket 131. The reset spring 144 is sleeved on one side of the connecting rod 132 above the bracket. The upper end of the connecting rod 132 has a limit platform with a larger outer diameter. The upper end of the reset spring 144 is against the lower side of the limit platform, and the lower end is connected to the bracket 131. The pre-pressing plate 121 is connected to the bottom end of the connecting rod 132. The film cutting knife 210 faces downward and is directly matched with the cutting groove 113. The top surfaces of the pre-pressing plate 121 and the bottom box 110 are parallel to each other, thereby ensuring the cutting accuracy of the film cutting knife 210.

[0027] The ultraviolet lamp 150 is located in the bottom box 110 , and faces upwards towards the light-transmitting hole 112 .

[0028] Specifically, the experimenter places the first transparent carrier on the light-transmitting hole 112 and within the range enclosed by the cutting groove 113 to prevent the cutter and the first transparent carrier from interfering and colliding. The optical film raw material and the second transparent carrier are sequentially laid on the second transparent carrier, and the first transparent carrier and the second transparent carrier are aligned with each other. The user toggles the rocker 143 to rotate the crossbar 141 relative to the bracket 131 and drives the cam 142 to rotate. The distal end of the cam 142 gradually moves toward the bottom end, the reset spring 144 is compressed, and the connecting rod 132 is gradually pushed downward by the cam 142, so that the pre-pressing plate 121 can move downward synchronously. In this process, the film cutting knife 210 cuts the optical film and the pre-pressing plate 121 1 continues to move downward and can be pressed on the second transparent carrier. The downward pre-pressing plate 121 forms a pre-pressure on the sample to ensure that the sample is compounded and pre-pressed layer by layer. The bubbles between the optical adhesive film and the first light-transmitting carrier and the second light-transmitting carrier can be squeezed out to make the two sides of the optical adhesive film completely fit together, thereby improving the quality of the test sample. Then, the ultraviolet lamp 150 is turned on, and the ultraviolet lamp 150 irradiates the sample through the light-transmitting hole 112 to complete the curing and cross-linking of the optical adhesive film to the transparent carriers on both sides of the optical adhesive film, thereby realizing sample preparation. Finally, the user pulls back the rocker 143, the reset spring 144 returns to its natural state, and lifts the connecting rod 132 upward to retract the pre-pressing plate 121, thereby making it convenient to take out the sample. The structure is reliable and convenient for users to use.

[0029] In essence, the entire portion of the bottom box 110 where the light-transmitting hole 112 is arranged can be made of a transparent material, such as transparent glass, transparent resin, etc., so that when the first transparent carrier is placed on the top surface of the bottom box 110 and covers the light-transmitting hole 112, ultraviolet light can pass through the top plate 111 of the bottom box 110 and irradiate the first transparent carrier.

[0030] The present invention can realize the sample cutting, compounding, pre-pressing and curing processes of the optical adhesive film in the same device, has a convenient and fast operation process, a reasonable structure, high experimental efficiency and improved experimental effect.

[0031] It should be noted that in order to improve the stability of the equipment, in this embodiment, the bracket 131 includes a first supporting column, a second supporting column and a mounting plate, the two first supporting columns are fixedly connected to the top plate 111 of the bottom box 110, the mounting plate connects the two first supporting columns and encloses the up and down moving space of the pre-load plate 121, the two second supporting columns are fixedly arranged on the mounting plate, the two ends of the cross bar 141 are respectively rotatably connected between the two second supporting columns, the two connecting rods 132 are slidably connected to the mounting through holes on the mounting plate, and the two cams 142 are synchronously arranged on the cross bar 141 corresponding to the position of the connecting rod 132, the bottom end of the cam 142 and the top surface of the connecting rod 132 are abutted, and a limit platform is provided on the side of the connecting rod 132 above the mounting plate, the upper end of the reset spring 144 is abutted against the bottom surface of the limit platform, the lower end of the reset spring 144 is pressed against the top surface of the mounting plate, and the rocker 143 is located between the two connecting rods 132, to ensure uniform and stable force and improve the service life of parts.

[0032] In addition, the pre-pressing plate 121 can also be directly driven up and down by the cylinder, and the connecting rod 132 is equivalent to the telescopic rod of the cylinder, so that the pre-pressing plate 121 can move up and down, or the pre-pressing plate 121 can also be driven by other up and down driving elements, such as a motor screw, etc., to improve the automation effect and improve the sample production efficiency.

[0033] In some embodiments, the driving structure of the cutting device may also include a motor, a crossbar 141 and a cam 142, the crossbar 141 is rotatably connected to the bracket 131, the cam 142 is synchronously connected to the crossbar 141, the bottom end of the cam 142 is pressed against the top of the connecting rod 132, and the motor rotates to drive the crossbar 141 to rotate forward and reverse, so as to realize the rotation of the cam 142, thereby driving the connecting rod 132 and the pre-pressing plate 121 to move up and down, thereby improving the automation effect. In this embodiment, the crossbar 141 is driven by manually moving the rocker 143, so as to enhance the manual operation of the experiment by the experimenter and improve the experimental effect.

[0034] Moreover, in the present embodiment, a through cooling channel 160 is provided inside the top plate 111 of the bottom box 110, and the inlet and outlet ends of the cooling channel 160 both extend to the side of the top plate 111. Cooling water or other cooling media can be introduced into the cooling channel 160, so that the cooling channel 160 can cool the top plate 111 of the bottom box 110 to prevent the optical adhesive film from sticking due to excessive temperature of the top plate 111. In addition, the cooling channel 160 is arranged to bypass the light-transmitting hole 112 to reduce interference with the sample.

[0035] At the same time, in order to further improve the cooling effect, a cooling fan can actually be installed on the side wall of the bottom box 110 to increase air circulation and reduce the rapid rise in internal temperature caused by the closed environment of the bottom box 110.

[0036] In addition, an inspection door 170 is provided on the side wall of the bottom box 110, so as to facilitate installation and removal of the ultraviolet lamp 150 and to facilitate inspection and maintenance, thereby improving the use effect.

[0037] In addition, the ultraviolet lamp 150 can emit ultraviolet light, and its control switch can be directly extended and set on the outer wall of the bottom box 110, which is convenient for users to control.

[0038] Reference Figure 3 , the surrounding wall of the light-transmitting hole 112 is provided with a loading step 310, and the loading step 310 is made of an acrylic plate. The sample can be placed on the loading step 310, so that the light-transmitting hole 112 can position the sample, and the cutting accuracy of the film cutting knife 210 is improved. At the same time, the transparent loading step 310 ensures that the ultraviolet lamp 150 can irradiate the sample, and the structure is reliable. In fact, the loading platform can also be made of transparent glass, as long as the ultraviolet light can penetrate, ensuring that the ultraviolet light can irradiate the sample. It should be noted that the loading step 310 can be arranged around the inner peripheral wall of the light-transmitting hole 112, or it can be arranged only on both sides of the inner wall of the light-transmitting hole 112 to reduce costs, or it can be horizontally covered in the light-transmitting hole 112. Because the first transparent carrier may be a softer PET film, the fully covered loading step 310 can improve the stability of sample preparation.

[0039] Moreover, in actual use, the top surface of the loading step 310 is provided with an ejection structure. When the sample needs to be taken out after the ultraviolet lamp irradiates the sample, the pressing of the pre-pressing plate 121 on the sample is cancelled. At this time, the ejection structure can move upward and eject the sample to prevent the sample from sticking in the light-transmitting hole 112, making it convenient to take out the sample. In fact, the ejection structure can be an ejection spring 320. The top of the ejection spring 320 passes through the top surface of the loading step 310 in a natural state. When the pre-pressing plate 121 acts on the sample, the ejection spring 320 is compressed. In addition, the ejection structure can also be composed of a lever and a return spring structure. The user presses one end of the external lever to make the other end of the lever lift the sample upward, etc. Moreover, the cutting groove 113 is downwardly inclined to fit the light-transmitting hole 112 to improve the cutting accuracy of the optical film.

[0040] Furthermore, the present invention also includes a method for preparing a sample of an optical adhesive film, which is applied to the above optical adhesive film experimental sample preparation device, and includes the following steps:

[0041] Step 1, placing a first transparent carrier that matches the size of the light-transmitting hole 112 on the loading step 310, and then sequentially laying an optical adhesive film and a second transparent carrier on the first transparent carrier, wherein the size of the second transparent carrier corresponds to that of the first transparent carrier;

[0042] Step 2: After aligning the first transparent carrier and the second transparent carrier, the pre-pressing plate 121 is moved downward, and the film cutting knife 210 can be inserted into the cutting groove 113 to cut the optical adhesive film. The pre-pressing plate 121 is continuously pressed downward and abuts against the top surface of the second transparent carrier to achieve pre-pressing of the sample, so that the bubbles between the first transparent carrier, the optical adhesive film and the second transparent carrier are squeezed out, so that the three are more tightly bonded, and the manufacturing accuracy is improved;

[0043] Step 3, turning on the ultraviolet lamp 150 and irradiating upward through the light-transmitting hole 112 and the loading step 310 to cause the optical adhesive film to be cured and cross-linked and to adhere the first transparent carrier and the second transparent carrier to form a test sample;

[0044] Step 4: When the temperature of the top plate 111 irradiated by the ultraviolet lamp 150 in step 3 exceeds a certain value, coolant is introduced into the cooling channel 160 to cool the top plate 111, so as to ensure that the temperature of the top plate 111 is lower than the melting temperature of the optical film;

[0045] Step 5. After the test sample is formed as in step 3, the pre-pressing plate 121 moves upward, and the top surface of the loading step 310 is provided with an ejection structure, which pushes up the sample stuck in the light-transmitting hole 112 or located in the light-transmitting hole 112 to achieve the detachment of the sample, making it convenient for the user to take it out.

[0046] Specifically, the loading step 310 supports the sample, and the light-transmitting hole 112 can position the first transparent carrier, the optical film and the second transparent carrier, thereby improving the cutting accuracy, reducing the occurrence of sample slippage, and reducing the interference and collision between the film cutting knife 210 and the sample. At the same time, the top of the second transparent carrier is higher than the top surface height of the bottom box 110 after overlapping, ensuring that the pre-pressing plate 121 can pre-press the sample and improve the experimental effect. The cooling channel 160 cools the top plate 111, and can maintain the temperature of the top plate 111 below the melting temperature of the optical film, that is, below 70°C, to reduce the impact of the excessive temperature of the top plate 111 on the optical film, thereby improving the experimental effect and accuracy. Moreover, because the sizes of the first transparent carrier and the second transparent carrier match the light-transmitting hole 112, the sample is easily stuck in the light-transmitting hole 112 after the pre-pressing plate 121 is pressed, and the sample can be directly lifted up through the ejection structure for easy removal.

[0047] In addition, it should be noted that the base layer of the optical adhesive film is EVA, and is composed of a photoinitiator, a cross-linking agent, a co-cross-linking agent, a coupling agent, and a composite fiber. When the optical adhesive film is irradiated with ultraviolet light, the photoinitiator absorbs the ultraviolet radiation energy and becomes activated, inducing the free radicals in the matrix to produce solidification and cross-linking to form a film, thereby achieving bonding between the optical adhesive film and the transparent carrier layer.

[0048] In addition, when different performance tests are performed, the first light-transmitting carrier and the second light-transmitting carrier are made of different materials: when testing the transmittance and weather resistance of the optical adhesive film, the first light-transmitting carrier and the second light-transmitting carrier can both be light-transmitting glass and transparent resin; when the sample is used to test the peel strength of the optical adhesive film, the first light-transmitting carrier and the second transparent carrier can be light-transmitting glass and PET film, respectively, to facilitate testing.

[0049] In this embodiment, the ejection structure is an ejection spring 320. It should be noted that the ejection spring 320 will not hinder the ultraviolet light, because the spring structure itself has a gap that allows light to pass through, and there is a cross-linking agent inside the optical film, which ensures that when irradiated with ultraviolet light, it decomposes inside to generate free radicals and transmits, thereby initiating a polymer free radical chain reaction to achieve cross-linking and curing.

[0050] The preferred embodiments of the present invention are specifically described above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A method for preparing a sample of an optical adhesive film, characterized in that: The optical film experimental sample preparation device comprises: A bottom box (110) having a light-transmitting hole (112) on its top surface, and a groove (113) is provided on the top surface of the bottom box (110) around the light-transmitting hole (112); A cutting device, comprising a pre-pressing plate (121) and a film cutting knife (210), wherein the film cutting knife (210) is arranged on the bottom surface of the pre-pressing plate (121), the pre-pressing plate (121) can move up and down, and the film cutting knife (210) faces downwards and directly toward the cutting groove (113) and matches with the cutting groove (113); The ultraviolet lamp (150) is located in the bottom box (110), the ultraviolet lamp (150) faces upwards to the light-transmitting hole (112), the peripheral wall of the light-transmitting hole (112) is provided with a loading step (310), the loading step (310) is made of a transparent material, the cutting device comprises a bracket (131), a driving structure and a connecting rod (132), the bracket (131) is connected to the top surface of the bottom box (110), the driving structure is arranged on the bracket (131) ), the connecting rod (132) is slidably connected to the bracket (131) in the up-down direction, the driving structure can drive the connecting rod (132) to move up and down, the bottom surface of the connecting rod (132) is connected to the pre-pressing plate (121), the driving structure comprises a cross bar (141), a rocker (143), a cam (142) and a return spring (144), the cross bar (141) is rotatably connected to the bracket (131), and the rotation axis, the center axis and the rotation axis of the cross bar (141) are The center lines of the rocker (143) and the cam (142) are synchronously connected to the cross bar (141), the rocker (143) extends in a direction away from the cross bar (141), the bottom end of the cam (142) abuts against the connecting rod (132), the return spring (144) is sleeved on the connecting rod (132), the upper end of the return spring (144) is connected to the connecting rod (132), and the lower end of the return spring (144) is connected to the bracket ( 131), when the part of the cam (142) that contacts the connecting rod (132) rotates toward the distal end of the cam (142), the connecting rod (132) moves downward, the return spring (144) is gradually compressed, and a cooling channel (160) is provided in the top plate (111) of the bottom box (110), the cooling channel (160) is arranged around the light-transmitting hole (112), and both ends of the cooling channel (160) extend to the side of the top plate (111); The method for preparing the optical adhesive film comprises the following steps: Step 1: The top surface of the bottom box (110) is provided with a light-transmitting hole (112), and a loading step (310) is provided inside the light-transmitting hole (112). A first transparent carrier having a size matching that of the light-transmitting hole (112) is placed on the loading step (310), and then an optical adhesive film and a second transparent carrier are sequentially laid on the first transparent carrier; Step 2: A cutting device is provided on the top surface of the bottom box (110), the cutting device comprising a film cutting knife (210) and a pre-pressing plate (121) that can move up and down, the film cutting knife (210) is connected to the bottom surface of the pre-pressing plate (121) and faces downwardly to the cutting groove (113), when the pre-pressing plate (121) moves downward, the film cutting knife (210) can extend into the cutting groove (113) and cut the optical adhesive film, and the pre-pressing plate (121) and the top surface of the second transparent carrier are abutted to achieve pre-pressing; Step 3: An ultraviolet lamp (150) is provided inside the bottom box (110). The ultraviolet lamp (150) is turned on and irradiated upward through the light-transmitting hole (112) and the loading step (310), thereby inducing the optical adhesive film to solidify and cross-link and bond the first transparent carrier and the second transparent carrier to form a test sample.

2. The method for preparing a sample of an optical adhesive film according to claim 1, characterized in that: The height of the first transparent carrier, the optical adhesive film and the second transparent carrier after being overlapped is greater than the distance from the object-carrying step (310) to the upper edge of the light-transmitting hole (112), and the bottom of the second transparent carrier is located in the light-transmitting hole (112).

3. The method for preparing a sample of an optical adhesive film according to claim 1, characterized in that: A cooling channel (160) is provided in the top plate (111) of the bottom box (110). When the temperature of the top plate (111) irradiated by the ultraviolet lamp (150) exceeds a certain value, a cooling liquid is introduced into the cooling channel (160) to cool the top plate (111).

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