Anti-fingerprint liquid medicine tape suitable for continuous evaporation of flexible film and continuous evaporation device

Abstract

An anti-fingerprint liquid medicine belt (30) suitable for continuous evaporation of a flexible film is provided with a latticed stainless steel conveying belt (31) capable of being bent into a roll, and a plurality of grids capable of being meshed with sawteeth of a rotary drum are distributed on the latticed stainless steel conveying belt (31); and a plurality of liquid medicine storage blocks (32) are uniformly arranged on the conveying belt at intervals. The continuous evaporation device loaded with the liquid medicine belt is arranged in a vacuum chamber of vacuum coating equipment and comprises a fixed support, a driving device and a driving device, and the fixed support is fixedly provided with a motor, a sawtooth-shaped rotary drum (10), an unwinding roller (21), a winding roller (22), a tension roller and an evaporation resisting module (40); one end of an anti-fingerprint liquid medicine tape (30) is wound on the unwinding roller, and the other end of the anti-fingerprint liquid medicine tape (30) is wound on the winding roller. When the rotary drum rotates by the same radian every time, the liquid medicine belts move forwards at equal intervals, the evaporation resisting modules are matched with the liquid medicine storage blocks one by one for heating evaporation, film coating is repeated in the same vacuum environment, vacuum breaking, vacuumizing and liquid medicine adding do not need to be stopped, efficiency is greatly improved, and quality is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible film anti-fingerprint potion evaporation coating, in particular to a continuous coating potion carrier applicable to flexible film anti-fingerprint potion evaporation coating, and a continuous coating device for loading such a potion carrier. Background Art

[0002] With the emergence of 3D curved screens and foldable electronic products, the demand for flexible protective films matching them is increasing. In the protection of the surface of flexible electronic products, compared with traditional tempered films, flexible protective films have stronger plasticity and safety, that is, they can fit the screen more perfectly, and at the same time, no fragments will be generated when damaged to cause additional harm.

[0003] The substrate of the flexible protective film is generally made of plastic materials such as PET. As a protective film that directly contacts consumers during use, the flexible protective film needs to have a smooth, scratch-resistant and fingerprint-easy-to-wipe effect. Therefore, the flexible protective film also needs to be coated with a hydrophobic and oleophobic anti-fingerprint film layer on the outermost layer. However, the difference from the coating process of tempered films with glass substrates is that in order to improve the coating efficiency, flexible protective films usually adopt the method of coating the whole roll, and then the whole roll is divided and die-cut after coating. In the existing technology of anti-fingerprint coating evaporation, usually according to the size of the coating chamber, the anti-fingerprint potion is prepared into anti-fingerprint particles one by one. In a vacuum environment, the perfluoropolyether siloxane molecules in the anti-fingerprint particles are attached to the surface of the substrate to be coated by resistance evaporation heating to form an anti-fingerprint film layer. Usually, the anti-fingerprint particles are replaced once for a furnace of products. However, in the process of winding coating, when using traditional anti-fingerprint particles for coating, usually a whole roll of coating cannot be completed by putting anti-fingerprint particles once, and the anti-fingerprint particles need to be continuously replaced by opening the chamber, so the vacuum will be continuously broken and evacuated, and the efficiency is very low, and the film-forming effect of the anti-fingerprint film layer on the coil is also difficult to control. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an anti-fingerprint potion belt applicable to continuous winding coating of flexible films, which does not need to open the chamber to replace the anti-fingerprint potion before the whole roll of coating is completed to improve the efficiency and maintain the stability of the coating quality, and at the same time provide a continuous evaporation coating device for loading such a potion belt.

[0005] To solve the above problems, the utility model provides an anti-fingerprint potion belt applicable to continuous evaporation coating of flexible films, which is characterized in that the main body is a grid-shaped stainless steel conveyor belt that can be bent into a roll, and a number of grids that can mesh with the sawteeth of the rotating cylinder of the continuous coating device are distributed thereon; a number of potion storage blocks are evenly installed at intervals in the length direction of the grid-shaped stainless steel conveyor belt.

[0006] As a further preferred technical solution, connecting rings or nuts are welded on the mesh-shaped stainless steel conveyor belt. The potion storage block is square, and through holes are provided at four corners. Screws, fixing pins, iron wires or steel wires pass through the through holes and are connected to the connecting rings or nuts on the mesh-shaped stainless steel conveyor belt.

[0007] The potion storage block is 1-2 mm wider than both sides of the mesh-shaped stainless steel conveyor belt.

[0008] The interval between two adjacent potion storage blocks on the mesh-shaped stainless steel conveyor belt is 50 mm.

[0009] The potion storage block is a stainless steel microfiber felt dropped with anti-fingerprint potion.

[0010] The size of the potion storage block 32 is 50 mm × 50 mm × 2 mm.

[0011] Meanwhile, the present utility model also provides a continuous evaporation coating device loaded with the above-mentioned anti-fingerprint potion belt applicable to continuous evaporation coating of flexible films, which is characterized in that it includes:

[0012] A fixed bracket is provided in the vacuum chamber of the vacuum coating equipment, on which a motor, a rotating cylinder, an unwinding roller, a winding roller, a tension roller and a vapor barrier module are fixed;

[0013] A driving mechanism, the driving mechanism includes a motor and a rotating cylinder driven by the motor, and the surface of the rotating cylinder is serrated;

[0014] A winding and unwinding mechanism, including an unwinding roller, a winding roller, and a tension roller;

[0015] The anti-fingerprint potion belt is completely placed in the vacuum chamber. One end of its mesh-shaped stainless steel conveyor belt is wound on the unwinding roller, the other end is wound on the winding roller, and it passes through the tension roller in the middle. And the meshes on the mesh-shaped stainless steel conveyor belt can be engaged with the serrations of the rotating cylinder;

[0016] A vapor barrier module, including a resistance wire and a heating molybdenum boat adapted to the potion storage block, which can heat each potion storage block correspondingly one by one;

[0017] A control module, whose control panel is arranged outside the vacuum chamber and is electrically connected to the motor and the resistance wire.

[0018] As a preferred method, the molybdenum boat on this continuous evaporation coating device is a flat molybdenum boat with 3 mm limits on both sides. Its two ends are open, and the potion storage block is accommodated and limited within the two sides of the molybdenum boat and can pass through both ends of the molybdenum boat.

[0019] Compared with the prior art, the present utility model has the following beneficial effects:

[0020] The prior art uses traditional vacuum devices and traditional anti-fingerprint particle coatings. Usually, it is impossible to complete the coating of the entire roll by applying the anti-fingerprint particles once. It is necessary to continuously open the chamber to replace the anti-fingerprint particles. It takes one or two minutes to coat one furnace of products, and then the vacuum is released and the vacuum is pumped again. Even when the vacuum pump is well maintained and operates properly, it still takes more than one hour. Then, it takes one or two minutes to evaporate and deposit the next furnace of products, and it takes more than one hour to release the vacuum and pump the vacuum again... This cycle repeats, continuously breaking the vacuum and pumping the vacuum. For example, when using the chemical Daikin UD509 to coat a 33nm film on a substrate of 50μm PET+HC+AR, continuously evaporating and depositing more than 10 furnaces takes 10 hours, and the efficiency is very low. It is also difficult to control the film-forming effect of the anti-fingerprint film layer on the coil. When the coating device is loaded with the continuous coating anti-fingerprint chemical tape of the present invention, several anti-fingerprint chemical storage blocks are arranged at equal intervals on a grid-shaped stainless steel conveyor belt and are placed in a roll on a fixed bracket in the furnace. The chemical storage block reaches the fixed position of the molybdenum boat with the conveyor belt, and the molybdenum boat heats the chemical storage block to achieve evaporation and deposition. One chemical storage block evaporates and deposits one furnace. After one furnace is completed, only a short stay is required for the molybdenum boat to cool, and then the motor can be started to drive the rotating cylinder to rotate, so that the next chemical storage block runs onto the molybdenum boat for the evaporation and deposition of the next furnace, saving the time of repeatedly breaking the vacuum and pumping the vacuum. Similarly, when using the chemical Daikin UD509 to coat a 33nm film on a substrate of 50μm PET+HC+AR, continuously coating 10 furnaces only takes 2.5 hours, truly realizing the "continuous" coating of the anti-fingerprint chemical in the vacuum chamber, without the need to frequently open and close the chamber door and replace the coating material, greatly improving the efficiency and also enhancing the stability of the coating quality.

[0021] The chemical storage block of the present invention is convenient to disassemble and can be recycled.

[0022] In a further preferred solution, the present invention uses a large-area block evaporation source to ensure the uniform dispersion of the volatilization of the anti-fingerprint liquid AF and the uniform deposition of the film layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the principle of a continuous evaporation and deposition device loaded with the anti-fingerprint chemical tape of the present invention.

[0024] Figure 2 It is a schematic diagram of the unwinding and rewinding of the continuous evaporation and deposition device used in the present invention.

[0025] Figure 3 It is a schematic diagram of the structure of the anti-fingerprint chemical tape and the corresponding heating module of the present invention

[0026] Figure 4 It is a schematic diagram of the meshing of the anti-fingerprint chemical tape and the rotating cylinder of the present invention.

[0027] The technical features and the reference numerals of the drawings correspond as follows:

[0028] Rotating cylinder 10, unwinding and rewinding mechanism 20, unwinding roller 21, rewinding roller 22, fingerprint-proofing liquid belt 30, grid-shaped stainless steel conveyor belt 31, liquid storage block 32, screw 33, vapor barrier module 40. Specific implementation mode

[0029] The technical solutions of the preferred embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0030] Refer to Figures 1-4 As shown, it is a continuous evaporation coating device suitable for fingerprint-proofing liquid evaporation coating of flexible films of the present utility model. This device includes a vacuum coating equipment. The difference from the prior art is that a continuous evaporation coating device is provided inside the vacuum chamber of the vacuum coating equipment. In particular, the fingerprint-proofing liquid belt of the present utility model is loaded inside the vacuum chamber.

[0031] As shown in the figure, on the base inside the coating vacuum chamber, a fixed bracket is set, on which a motor, a rotating cylinder 10, an unwinding roller 21, a rewinding roller 22, a tension roller and a vapor barrier module 40 are installed. The motor and the rotating cylinder 10 serve as a driving mechanism. The rotating cylinder 10 is installed on the output shaft of the motor and is driven by the motor to rotate. The surface of the rotating cylinder is serrated.

[0032] The unwinding roller 21, the rewinding roller 22, and the tension roller serve as the unwinding and rewinding mechanism 30. A fingerprint-proofing liquid belt 30 is installed on the unwinding and rewinding mechanism 30. The main body of the fingerprint-proofing liquid belt 30 is a grid-shaped stainless steel conveyor belt 31. One end is wound on the unwinding roller 21, the other end is wound on the rewinding roller 22, and it passes through the tension roller in the middle. And the grids on the grid-shaped stainless steel conveyor belt 30 can be engaged with the serrations of the rotating cylinder 10.

[0033] Along the length direction of the grid-shaped stainless steel conveyor belt 31, a number of liquid storage blocks 32 are installed at uniform intervals. The installation method is that connecting rings or nuts are welded on the grid-shaped stainless steel conveyor belt 31. The liquid storage blocks 32 are square, with through holes at the four corners. Screws 33 or fixing pins or wires or steel wires pass through the through holes and are connected to the connecting rings or nuts on the grid-shaped stainless steel conveyor belt 31.

[0034] The potion storage block 32 is a stainless steel microfiber felt dropped with anti-fingerprint potion, and its size is preferably a large-area evaporation source with dimensions of 50mm×50mm×2mm, ensuring the uniform dispersion of the volatilization of the anti-fingerprint liquid medicine AF; the interval between two adjacent potion storage blocks 32 on the grid-shaped stainless steel conveyor belt 31 is 50mm. The potion storage block 32 protrudes 1-2mm wider than both sides of the grid-shaped stainless steel conveyor belt 31. This is mainly to better position the potion storage block on the molybdenum boat. On the one hand, the size exactly matches the molybdenum boat and can be stuck on the molybdenum boat. On the other hand, it also increases the contact area between the molybdenum boat and the potion storage block, increases the heating surface, and improves the resistance evaporation efficiency.

[0035] The resistance evaporation module 40 is in accordance with the prior art and includes a resistance wire and a molybdenum boat. The molybdenum boat preferably used in the present invention is a flat molybdenum boat with limiting baffles 3mm high on both sides, which is adapted to the potion storage block 32. The flat molybdenum boat is open at both ends, accommodating the potion storage block 32 limited between the limiting baffles on both sides of the molybdenum boat, and can pass through both ends of the molybdenum boat.

[0036] This continuous evaporation coating device is also provided with a control module, and its control panel is arranged outside the vacuum chamber and is electrically connected to the motor and the resistance wire to control their switches, which is the same as the control method in the prior art.

[0037] When using the continuous evaporation coating device loaded with the anti-fingerprint potion belt of the present invention, the working process is as follows:

[0038] S1. Open the hatch of the vacuum coating equipment, and install the rolled anti-fingerprint potion belt 30 on the unwinding roller 21 of the winding and unwinding mechanism 20.

[0039] S2. Pull out and flatten the grid-shaped stainless steel conveyor belt 31 at the front end of the anti-fingerprint potion belt 30 (i.e., the place without the potion storage block 32) from the unwinding roller 21, pass it through the openings at both ends of the molybdenum boat of the resistance evaporation module 40. The grid-shaped stainless steel conveyor belt 31 meshes with the rotating cylinder 10 of the driving mechanism. Fix the front end of the anti-fingerprint potion belt 30 on the winding roller 22 with a fixing rod, and then adjust the grid-shaped stainless steel conveyor belt 31 so that the first potion storage block 33 on it is just located on the molybdenum boat of the resistance evaporation module 40.

[0040] S3. Place the flexible film product to be coated in accordance with the winding and unwinding method of the flexible film in the prior art, close the hatch, and start pumping vacuum until the vacuum degree reaches 5×10 -3 Pa. In the prior art, a unwinding chamber and a winding chamber can be arranged on both sides of the coating chamber, and isolation valves are installed between the unwinding chamber and the winding chamber and the coating chamber. When the isolation valve is opened, the flexible film passes through the extremely narrow slit on the isolation valve and moves and winds in the unwinding chamber - coating chamber - winding chamber. After the flexible film moves in place, the isolation valve is closed.

[0041] S4. The resistance wire inside the anti-vaporization module 40 is heated, and the anti-fingerprint liquid in the liquid storage block 33 above it reaches the evaporation point, vaporizes and moves, and adheres to the surface of the flexible film product to be plated. At this time, a film thickness monitor commonly used in the prior art can be used to monitor the film thickness of the anti-fingerprint film layer deposited on the product surface.

[0042] S5. Wait for the curve of the film thickness monitor to return to zero, which means that the anti-fingerprint liquid in the liquid storage block has completely evaporated. Then, the heating of the anti-vaporization module can be controlled to stop, and wait for about 10 minutes for the molybdenum boat to cool down. On the one hand, the temperature is reduced below the evaporation point of the anti-fingerprint liquid to prevent waste of the anti-fingerprint liquid. On the other hand, give a certain time for the already plated flexible film to be wound up, and at the same time, the flexible film to be plated is unwound and moved into the coating chamber.

[0043] S6. The motor drives the rotating cylinder 10 of the driving mechanism to rotate, and drives the winding roller 22 and the unwinding roller 21 to rotate simultaneously through the anti-fingerprint liquid belt 30. The anti-fingerprint liquid belt 30 passes through a tension roller (a conventional technology, not shown in the figure) and is conveyed to the winding roller 22 for winding. At the same time, the anti-fingerprint liquid belt 30 moves forward, just moving the next liquid storage block 32 onto the molybdenum boat. At this time, the position of the liquid storage block 32 can be confirmed to be accurately located in the molybdenum boat of the anti-vaporization module 40 through the observation window; sensors can also be set for automatic and accurate control. The rotating cylinder rotates by the same arc each time, so that the anti-fingerprint liquid belt 30 moves forward at equal intervals, and the liquid storage blocks 32 are placed on the molybdenum boat one by one.

[0044] S7. The next blank flexible film sample to be plated is moved into the coating chamber, and the anti-vaporization module is heated again.

[0045] S8. Repeat the steps of S4 to S7 until the continuous coating of the flexible film is completed.

Claims

1. An anti-fingerprint solution belt (30) suitable for continuous evaporation of flexible films, characterized in that: The main body is a mesh-shaped stainless steel conveyor belt (31) that can be bent into a roll, on which are distributed a plurality of meshes that can mesh with the teeth of a rotating drum of a continuous coating device; a plurality of liquid medicine storage blocks (32) are evenly spaced and installed along the length direction of the mesh-shaped stainless steel conveyor belt (31).

2. The anti-fingerprint solution belt (30) suitable for continuous evaporation of flexible films according to claim 1, characterized in that: A connecting ring or nut is welded on the mesh-shaped stainless steel conveyor belt (31); the medicine storage block (32) is square and has through holes at four corners, through which screws (33) or fixing pins or iron wires or steel wires pass to connect with the connecting ring or nut on the mesh-shaped stainless steel conveyor belt (31).

3. The anti-fingerprint solution belt (30) suitable for continuous evaporation of flexible films according to claim 1, characterized in that: The medicine storage block (32) is 1-2 mm wider than the two sides of the grid-shaped stainless steel conveyor belt (31).

4. The anti-fingerprint solution belt (30) suitable for continuous evaporation of flexible films according to claim 1, characterized in that: The interval between two adjacent medicine storage blocks (32) on the grid-shaped stainless steel conveyor belt (31) is 50 mm.

5. The anti-fingerprint solution belt (30) suitable for continuous evaporation of flexible films according to claim 1, characterized in that: The liquid medicine storage block (32) is a stainless steel micro-wire felt dripped with anti-fingerprint liquid medicine.

6. The anti-fingerprint solution belt (30) suitable for continuous evaporation of flexible films according to claim 1, characterized in that: The size of the medicine storage block (32) is 50 mm×50 mm×2 mm.

7. A continuous evaporation device equipped with the anti-fingerprint solution belt (30) suitable for continuous evaporation of flexible films according to any one of claims 1 to 6, characterized in that it include: A fixed bracket is provided in the vacuum chamber of the vacuum coating equipment, on which a motor, a rotating drum (10), an unwinding roller (21), a winding roller (22), a tension roller and a steam-proof module (40) are fixed; A driving mechanism, the driving mechanism comprising a motor and a rotating drum (10) driven by the motor, wherein the surface of the rotating drum is serrated; The unwinding and rewinding mechanism (20) comprises an unwinding roller (21), a rewinding roller (22), and a tension roller; The anti-fingerprint solution belt (30) is completely placed in the vacuum chamber, one end of the mesh-shaped stainless steel conveyor belt (31) is rolled on the unwinding roller (21), and the other end is rolled on the winding roller (22), passing through a tension roller in the middle, and the mesh on the mesh-shaped stainless steel conveyor belt (31) can mesh with the saw teeth of the rotating drum (10); The steam-proof module (40) comprises a resistance wire and a heating molybdenum boat that can be matched with the medicine storage block (32), and can heat the medicine storage blocks (32) one by one; The control module has a control panel arranged outside the vacuum chamber and electrically connected to the motor and the resistance wire.

8. The continuous evaporation device loaded with the anti-fingerprint solution belt (30) suitable for continuous evaporation of flexible films according to claim 7, characterized in that: The molybdenum boat is a flat molybdenum boat with 3mm limits on both sides, and its two ends are open, accommodating the medicine storage block (32) which is limited within the two sides of the molybdenum boat and can pass through the two ends of the molybdenum boat.

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