Monitoring film belt and preparation method and application method thereof

Abstract

The invention discloses a monitoring membrane tape and a preparation method and an application method thereof, and belongs to the technical field of raw ceramic tape casting, the monitoring membrane tape comprises a first membrane layer and a second membrane layer, an activated carbon fiber layer is arranged between the first membrane layer and the second membrane layer, a plurality of monitoring membrane blocks are arranged between the activated carbon fiber layer and the second membrane layer, and the monitoring membrane blocks are connected with the first membrane layer and the second membrane layer. Any two adjacent monitoring membrane blocks are connected through a PLA connecting membrane, and each monitoring membrane block comprises a monitoring membrane shell and monitoring liquid arranged in the monitoring membrane shell. The application method comprises the following steps: when the monitoring film tape and the green tape are greatly stretched together in the rolling process, the monitoring film layer is broken, the wrapped monitoring liquid flows out so as to be marked on the first film layer and the second film layer, and the stretching condition is checked at a specific position according to the marked position and color marking condition.

Description

Technical Field

[0001] The invention relates to the technical field of green porcelain tape casting, and in particular to a monitoring film belt and a preparation method and an application method thereof. Background Art

[0002] In the preparation process of electrostatic chuck ceramic disc, tape casting can be used. Tape casting molding refers to adding solvents, dispersants, binders, plasticizers and other ingredients to ceramic powder to obtain a uniformly dispersed stable slurry, and a molding method of making a film of required thickness on a tape casting machine. This method has the advantages of simple equipment, continuous operation, high production efficiency, high automation level, stable process, high repeatability of the performance of the molded green body and consistency of size, and uniform green body performance. It has been widely used in the molding process of ceramic materials.

[0003] The working principle of the tape casting machine mainly involves extruding the molten polymer material and cooling it to form it. The following is a detailed description of the working principle of the tape casting machine:

[0004] 1. Slurry preparation and mixing: Select appropriate ceramic powder as raw material, and form a flowing and plastic slurry in an aqueous solution or anhydrous solution composed of solvents, plasticizers, binders and suspending agents. Use a high shear mixer or ball mill to fully mix and disperse the slurry to ensure that all components are evenly distributed.

[0005] 2. Slurry degassing: Degas the mixed ceramic slurry to remove bubbles in the slurry to ensure that no pores or defects appear during the molding process.

[0006] 3. Tape casting: Pour the degassed ceramic slurry into the trough of the tape casting machine. By adjusting the height and moving speed of the scraper, the ceramic slurry is evenly coated on a moving carrier (usually a polymer film or metal belt) to form a uniform ceramic film. The thickness of the slurry can be controlled by adjusting the height of the scraper.

[0007] 4. Drying: The coated ceramic film is dried by a drying system, usually including hot air drying or infrared drying. During the drying process, the solvent evaporates, leaving a solid film formed by ceramic powder and binder.

[0008] 5. Demolding and subsequent processing: The dried ceramic film is peeled off from the carrier tape to form a self-supporting ceramic sheet. The demoulded ceramic sheet is cut and trimmed to achieve the required size and shape. The ceramic sheet is subjected to debinding treatment to remove binders and other organic components, usually at a lower temperature.

[0009] 6. Sintering: Finally, the ceramic sheet is placed in a high-temperature furnace for sintering. The sintering process is usually carried out at a high temperature (such as 1200°C to 1600°C) to cause the ceramic particles to undergo solid-phase sintering to form a dense ceramic material.

[0010] Tape casting technology can effectively produce uniform and high-quality ceramic films and ceramic substrates, which are widely used in electronics, energy, chemical industry and other fields.

[0011] There are still many problems with the current raw porcelain tape production process: for some materials with high viscosity, high melting point or special properties, the applicability of the tape casting process is limited and special process improvements are required. Tape casting equipment requires a highly precise control system to ensure the stability of film thickness and uniformity, and has high requirements for equipment maintenance and operation. The tape casting process is very sensitive to process parameters such as temperature, speed, and pressure, and the slightest carelessness may lead to product defects such as bubbles, wrinkles, and uneven thickness. Moreover, for ceramic tape casting, the uniform volatilization of solvents during the drying process is a challenge, which may cause problems such as film warping and cracking, and the belt is prone to unpredictable effects in subsequent use. Summary of the invention

[0012] The technical problem to be solved by the present invention is to provide a monitoring membrane belt and a preparation method and an application method thereof, so as to solve the problems raised in the background technology.

[0013] In order to solve the above technical problems, the technical solution of the present invention is:

[0014] On one hand, the present invention discloses a monitoring membrane belt, which includes a first membrane layer and a second membrane layer, an activated carbon fiber layer is arranged between the first membrane layer and the second membrane layer, and a plurality of monitoring membrane blocks are arranged between the activated carbon fiber layer and the second membrane layer, and any two adjacent monitoring membrane blocks are connected by a PLA connecting membrane, and the monitoring membrane block includes a monitoring membrane shell and a monitoring liquid arranged inside the monitoring membrane shell.

[0015] Preferably, a plurality of flexible blocks for support are provided between the activated carbon fiber layer and the second membrane layer, and the flexible blocks are arranged on one side of the monitoring membrane block.

[0016] Preferably, the first film layer is made of PET film, the second film layer is made of PEN film, and the monitoring film shell is made of PLA film.

[0017] Preferably, the monitoring liquid is an organic pigment extracted from plants.

[0018] Preferably, the flexible block is a square-shaped flexible block and is made of silicone material.

[0019] Another invention of the present invention discloses a method for preparing a monitoring membrane tape, the preparation method comprising:

[0020] Material preparation: prepare the first membrane layer, the second membrane layer, the activated carbon fiber layer, the monitoring membrane block, the flexible block and the PLA connecting membrane;

[0021] The PLA connecting membrane is used to connect adjacent monitoring membrane blocks. The first membrane layer is laid flat on a horizontal surface, and the activated carbon fiber layer is bonded to the first membrane layer.

[0022] Evenly apply adhesive on the upper and lower sides of several monitoring membrane blocks and place them on the activated carbon fiber layer to bond them to the activated carbon fiber layer. Place a flexible block between any two adjacent monitoring membrane blocks and then bond the second membrane layer to the monitoring membrane blocks.

[0023] After the second film layer is bonded, turn over the entire monitoring film strip to determine the reliability of the bonding.

[0024] Another aspect of the present invention also discloses an application method for monitoring a membrane tape, the method comprising:

[0025] The monitoring film tape is used to replace the ordinary film tape in the process of preparing electrostatic chuck ceramics, specifically to carry and drive the slurry to form during the green ceramic casting process, and finally the monitoring film tape is rolled up together with the green ceramic tape;

[0026] By monitoring the film tape to limit the stretching of the green tape, the deformation of the green tape during the tape casting and winding process is reduced, thus playing a role in supporting the green tape;

[0027] When the monitoring film tape and the green ceramic tape are subjected to a large stretch during the winding process, the monitoring film layer will break, and the monitoring liquid wrapped therein will flow out and be marked on the first film layer and the second film layer. The stretching condition can be checked at a specific position by the marked position and color marking, and the excess monitoring liquid will be absorbed by the activated carbon fiber layer;

[0028] If no obvious color marks are observed on the surface of the monitoring film tape, it is judged that during the process of the green porcelain tape casting and winding, the monitoring film block inside the monitoring film tape that is wound together has not been subjected to excessive pulling, indicating that the green porcelain tape has not been damaged by excessive pulling; when obvious color marks are observed on the surface of the monitoring film tape, it indicates that the monitoring film block has been subjected to excessive pulling, that is, the green porcelain tape has been excessively pulled during the process of casting and winding and has been damaged.

[0029] The above technical solution has the following beneficial effects:

[0030] By setting a monitoring film belt, when the monitoring film block is greatly stretched during the winding process of the green porcelain belt, the monitoring film block will be broken, and the monitoring liquid therein will be retained to mark the first film layer and the second film layer. The stretching condition of the area can be detected by the position and color of the mark;

[0031] The monitoring film tape prepared by this method is used to replace the existing film tape. During the green porcelain casting process in the preparation of the electrostatic chuck ceramic disc, it plays the role of carrying the ceramic slurry and driving the slurry to form. During the forming process, it is wound together with the ceramic slurry. The stretching of the green porcelain tape is limited by the above-mentioned monitoring film tape, and the degree of pulling deformation is reduced during the casting and winding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of a monitoring membrane belt of the present invention. DETAILED DESCRIPTION

[0033] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Example 1

[0035] refer to Figure 1 A monitoring membrane belt includes a first membrane layer 1 and a second membrane layer 2, an activated carbon fiber layer 3 is arranged between the first membrane layer 1 and the second membrane layer 2, a plurality of monitoring membrane blocks 4 are arranged between the activated carbon fiber layer 3 and the second membrane layer 2, any two adjacent monitoring membrane blocks 4 are connected by a PLA connecting membrane 6, and the monitoring membrane block 4 includes a monitoring membrane shell and a monitoring liquid arranged inside the monitoring membrane shell;

[0036] A plurality of flexible blocks 5 for supporting are also provided between the activated carbon fiber layer 3 and the second membrane layer 2. The flexible blocks 5 are arranged on one side of the monitoring membrane block 4. The flexible blocks 5 are used to support the activated carbon fiber layer 3 and the second membrane layer 2. Specifically, the upper side of the flexible blocks 5 is connected to the second membrane layer 2, and the lower side thereof is connected to the PLA connecting membrane 6. The lower side of the PLA connecting membrane 6 is connected to the activated carbon fiber layer 3.

[0037] The first film layer 1 is made of PET film, and the second film layer 2 is made of PEN film. When the monitoring film belt is used, the monitoring film belt itself has a certain elasticity and can be stretched to a certain extent. During use, one side of the second film layer 2 is released from the side of the green porcelain. The PEN film material used has higher hardness and strength than PET. Preferably, the first film layer 1 and the second film layer 2 are the same in size. In other implementations of this embodiment, the first film layer 1 and the second film layer 2 can also be made of the same material, both of which are made of PET film or PEN film;

[0038] The activated carbon fiber layer 3 has two functions: first, when the monitoring membrane belt and the green porcelain belt are subjected to a large stretch, the monitoring membrane shell in the middle will break and the monitoring liquid will flow out. In addition to being used to mark the position, the remaining monitoring liquid will be absorbed by the activated carbon fiber layer 3, and the adsorption capacity is good and the color change is shown. Second, the activated carbon fiber layer 3 can be regenerated by heat, and the adsorbed substances are decomposed or volatilized by heating the activated carbon fiber to restore its adsorption capacity, and it can be reused many times;

[0039] The monitoring membrane shell is made of PLA membrane, which is a biodegradable material that is easy to break when subjected to tensile force and has high sensitivity. On the one hand, when the pulling force is large, PLA will break, causing the detection liquid to leak out, achieving the purpose of monitoring. On the other hand, PLA is a biodegradable material, environmentally friendly and easy to handle;

[0040] The monitoring liquid is an organic pigment extracted from plants, which is adjusted to a liquid. The pigment is non-toxic and harmless. It will decompose and release non-toxic products at high temperatures. It is environmentally friendly and easy to handle.

[0041] The flexible block 5 is a square-shaped flexible block and is made of a silicone material. The flexible block 5 made of the silicone material has a certain elasticity and is easy to support.

[0042] Example 2

[0043] A monitoring membrane belt includes a first membrane layer 1 and a second membrane layer 2, an activated carbon fiber layer 3 is provided between the first membrane layer 1 and the second membrane layer 2, a monitoring membrane block 4 is provided between the activated carbon fiber layer 3 and the second membrane layer 2, the size of the monitoring membrane block 4 is the same as that of the first membrane layer 1, relative to embodiment 1, there is no need to set a flexible block 5, but it is directly supported by the monitoring membrane block 4, the monitoring membrane block 4 includes a monitoring membrane shell and a monitoring liquid arranged inside the monitoring membrane shell, when in use, when the monitoring membrane block 4 is broken by tension / compression, the monitoring liquid therein flows out for marking.

[0044] Example 3

[0045] Another invention of the present invention discloses a method for preparing a monitoring membrane tape, the preparation method comprising:

[0046] Material preparation: prepare the first film layer 1, the second film layer 2, the activated carbon fiber layer 3, the monitoring film block 4, the flexible block 5 and the PLA connecting film 6, wherein the first film layer 1 and the second film layer 2 are of the same size, and the first film layer 1 is a PET film, the second film layer 2 is a PEN film, and the PLA connecting film 6 is used to connect different monitoring modules 4;

[0047] Lay the first membrane layer 1 flat on a horizontal surface, and bond the activated carbon fiber layer 3 to the first membrane layer 1;

[0048] A plurality of monitoring membrane blocks 4 are uniformly coated with adhesive on both sides, and then placed on the activated carbon fiber layer 3, and bonded to the activated carbon fiber layer 3. A flexible block 5 is placed between any two adjacent monitoring membrane blocks 4, and then the second membrane layer 2 is bonded to the monitoring membrane block 4. Specifically, the flexible block 5 is placed;

[0049] After the second film layer 2 is bonded, the entire monitoring film strip is turned over to determine the reliability of the bonding. If the structure is stable after turning over, it is determined that the overall structure of the preparation is stable and reliable;

[0050] The monitoring film tape prepared by this method is used to replace the existing film tape. During the green porcelain casting process in the preparation of the electrostatic chuck ceramic disc, it plays the role of carrying the ceramic slurry and driving the slurry to form. During the forming process, it is wound together with the ceramic slurry. The stretching of the green porcelain tape is limited by the above-mentioned monitoring film tape, and the degree of pulling deformation is reduced during the casting and winding process.

[0051] Example 4

[0052] Another aspect of the present invention discloses an application method of a monitoring film tape, which is applied to the casting step of preparing an electrostatic chuck ceramic disc, and the application method comprises:

[0053] The monitoring film tape is used to replace the ordinary film tape in the process of preparing the electrostatic chuck ceramic, specifically to carry and drive the slurry to form during the green porcelain casting process, and finally the monitoring film tape is rolled up together with the green porcelain tape, and when in use, the green porcelain is in contact with the second film layer 2;

[0054] By monitoring the film tape to limit the stretching of the green tape, the deformation of the green tape during the tape casting and winding process is reduced, thus playing a role in supporting the green tape;

[0055] When the monitoring film tape and the green ceramic tape are subjected to a large stretch during the winding process, the monitoring film layer will break, and the monitoring liquid wrapped therein will flow out and be marked on the first film layer 1 and the second film layer 2. The stretching condition is checked at a specific position by the marked position and color marking, and the excess monitoring liquid will be absorbed by the activated carbon fiber layer 3;

[0056] If no obvious color mark is observed on the surface of the monitoring film tape, it is judged that during the process of the green porcelain tape casting and winding, the monitoring film block 4 inside the monitoring film tape wound together has not been subjected to excessive pulling, indicating that the green porcelain tape has not been damaged by excessive pulling; when obvious color mark is observed on the surface of the visual inspection film tape, it indicates that the monitoring film block 4 has been subjected to excessive pulling, that is, the green porcelain tape has been subjected to excessive pulling and damage during the process of casting and winding;

[0057] By setting a monitoring membrane belt, when the monitoring membrane block therein is subjected to a significant stretch during the winding process of the raw porcelain belt, the monitoring membrane block will break, and the monitoring liquid therein will be retained and marked on the first membrane layer 1 and the second membrane layer 2, and the colored monitoring liquid will flow out from the broken monitoring membrane block 4, first pass through the activated carbon fiber layer 3, be absorbed by the activated carbon fiber layer 3 and then displayed after being marked, and then pass through the activated carbon fiber layer 3 and then go to the first membrane layer 1, and the stretching condition of the area can be detected by the position of the mark and the color of the mark, and the above method can be used to achieve the purpose of monitoring.

[0058] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A monitoring membrane tape, characterized in that: The monitoring membrane strip comprises a first membrane layer (1) and a second membrane layer (2), an activated carbon fiber layer (3) is arranged between the first membrane layer (1) and the second membrane layer (2), a plurality of monitoring membrane blocks (4) are arranged between the activated carbon fiber layer (3) and the second membrane layer (2), any two adjacent monitoring membrane blocks (4) are connected via a PLA connecting membrane (6), and the monitoring membrane block (4) comprises a monitoring membrane shell and a monitoring liquid arranged inside the monitoring membrane shell.

2. A monitoring membrane tape according to claim 1, characterized in that: A plurality of flexible blocks (5) for support are also provided between the activated carbon fiber layer (3) and the second membrane layer (2), and the flexible blocks (5) are arranged on one side of the monitoring membrane block (4).

3. A monitoring membrane tape according to claim 1, characterized in that: The first film layer (1) is made of PET film, the second film layer (2) is made of PEN film, and the monitoring film shell is made of PLA film.

4. A monitoring membrane tape according to claim 1, characterized in that: The monitoring liquid is an organic pigment extracted from plants.

5. A monitoring membrane tape according to claim 1, characterized in that: The flexible block (5) is a square-shaped flexible block and is made of silicone material.

6. A method for preparing a monitoring membrane tape as claimed in any one of claims 1 to 5, characterized in that: The preparation method comprises: Material preparation: prepare the first membrane layer (1), the second membrane layer (2), the activated carbon fiber layer (3), the monitoring membrane block (4), the flexible block (5) and the PLA connecting membrane (6); The PLA connecting film (6) is used to connect adjacent monitoring membrane blocks (4), the first membrane layer (1) is laid flat on a horizontal surface, and the activated carbon fiber layer (3) is bonded to the first membrane layer (1); A plurality of monitoring membrane blocks (4) are uniformly coated with adhesive on both sides thereof and then placed on the activated carbon fiber layer (3) to be bonded to the activated carbon fiber layer (3); a flexible block (5) is placed between any two adjacent monitoring membrane blocks (4); and the second membrane layer (2) is then bonded to the monitoring membrane block (4); After the second film layer (2) is bonded, the entire monitoring film strip is turned over to determine the reliability of the bonding.

7. A method for using the monitoring membrane tape according to any one of claims 1 to 5, characterized in that: The method comprises: The monitoring film tape is used to replace the ordinary film tape in the process of preparing electrostatic chuck ceramics, specifically to carry and drive the slurry to form during the green ceramic casting process, and finally the monitoring film tape is rolled up together with the green ceramic tape; By monitoring the film tape to limit the stretching of the green tape, the deformation of the green tape during the tape casting and winding process is reduced, thus playing a role in supporting the green tape; When the monitoring film tape and the raw ceramic tape are subjected to a large degree of stretching during the winding process, the monitoring film layer will break, and the monitoring liquid wrapped therein will flow out and be marked on the first film layer (1) and the second film layer (2). The stretching condition is checked at a specific position by the position and color marking of the mark, and the excess monitoring liquid will be absorbed by the activated carbon fiber layer (3); If no obvious color mark is observed on the surface of the monitoring film tape, it is judged that the monitoring film block (4) inside the monitoring film tape that is rolled up together is not subjected to excessive pulling during the process of the green porcelain tape casting and winding, indicating that the green porcelain tape is not damaged by excessive pulling; when obvious color mark is observed on the surface of the monitoring film tape, it indicates that the monitoring film block (4) is subjected to excessive pulling, that is, the green porcelain tape is subjected to excessive pulling during the process of casting and winding, and is damaged.

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