Electrically conductive modified thermoplastic elastomer composite film and process for producing the same

Abstract

The application discloses a conductive modified thermoplastic elastomer composite film and a production process thereof, and relates to the technical field of composite films.The conductive modified thermoplastic elastomer composite film comprises a base sheet layer and composite layers which are laminated on both sides of the base sheet layer, the base sheet layer is made of modified polyether ether ketone material, the composite layers are made of TPE material, and the top and bottom of the base sheet layer are both bonded and fixed with a first conductive pad strip layer.The conductive modified thermoplastic elastomer composite film and the production process thereof have the advantages that the structure of the composite film is improved, the composite film has conductivity, the structure of the composite film is more stable, the composite film has a certain buffering and shock resistance effect, the functionality of the composite film is effectively increased, the conductive wire is protected in multiple ways, the quality of the product after being put into use is effectively ensured, the visual color powder is added, the appearance of the product is improved, and the functionality of the product is further increased.

Description

Technical Field

[0001] This invention relates to the field of composite film technology, specifically to a conductive modified thermoplastic elastomer composite film and its production process. Background Technology

[0002] Composite films are polymer materials composed of two or more layers of films made of different materials. TPE is a thermoplastic elastomer material with high strength, high resilience, and injection molding properties. It has a wide range of applications, is environmentally friendly, non-toxic, and safe, has excellent colorability, a soft touch, weather resistance, fatigue resistance, and temperature resistance, and excellent processing performance. It does not require vulcanization, can be recycled to reduce costs, and can be used for secondary injection molding, overmolding and bonding with base materials such as PP, PE, PC, PS, and ABS, or it can be molded alone.

[0003] Existing TPE films cannot conduct electricity during use, which greatly limits their application range. To address this, a conductive modified thermoplastic elastomer composite film and its production process are proposed. By modifying TPE films to conduct electricity, a composite film is formed, which not only improves the appearance but also endows them with conductive properties, effectively expanding the application range of TPE films. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a conductive modified thermoplastic elastomer composite film and its production process, which solves the problem that existing TPE films cannot conduct electricity during use, greatly limiting the application range of TPE films.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a conductive modified thermoplastic elastomer composite film, comprising a substrate layer and a composite layer pressed onto both sides of the substrate layer. The substrate layer is made of modified polyetheretherketone (PEEK) material, and the composite layer is made of TPE material. A first conductive pad layer is bonded and fixed to both the top and bottom of the substrate layer. Several first conductive pad layers are provided, and the several first conductive pad layers are evenly spaced apart. A second conductive pad layer adapted to the first conductive pad layer is fixedly connected to the side of each composite layer closest to the substrate layer. The contacting first and second conductive pad layers constitute an insulating reinforcing block, and a color-tuning elastic layer is filled between two adjacent insulating reinforcing blocks.

[0008] By adopting the above technical solution, the structure of the composite film is improved, making the composite film conductive, more stable, and with a certain buffering and shock-resistant effect, effectively increasing the functionality of the composite film.

[0009] The present invention is further configured such that: a slot is formed on the side of the first conductive pad layer away from the substrate layer, and a card block adapted to the slot is fixedly connected to the side of the second conductive pad layer near the substrate layer.

[0010] By adopting the above technical solution, the coordinated arrangement of the slot and the block effectively ensures the stability of the connection between the two first conductive pad layers and the second conductive pad layer.

[0011] The present invention is further configured such that: both the first conductive pad layer and the second conductive pad layer include an elastic layer and a wire fiber from the outside to the inside.

[0012] By adopting the above technical solution, the elastic layer is used to protect the wire fibers, ensuring the effective conductivity of the composite film.

[0013] The present invention is further configured such that: the elastic layer is made of foamed polypropylene material, and the conductor fiber specifically includes a conductive wire and a latex protective layer covering the conductive wire.

[0014] By adopting the above technical solution, the conductive wires are further protected by a latex protective layer.

[0015] The present invention is further configured such that: the color-adjusting elastic layer specifically includes colored powder and a polyethylene plastic layer, wherein the colored powder is obtained by ultra-fine grinding and pulverizing one or more of the following: dragon's breath stone, iron dragon stone, and Congling jade, and then screening through a 400-mesh sieve.

[0016] By adopting the above technical solution, material powder is added to the polypropylene plastic layer, and the addition of visible color greatly improves the aesthetics of the product.

[0017] The present invention is further configured such that: the substrate layer and the two composite layers are coated with an adhesive layer on opposite sides and between two adjacent isolation reinforcement blocks.

[0018] By adopting the above technical solution, the adhesive layer can improve the stability of the connection between the color-tuning elastic layer, the substrate layer, and the composite layer.

[0019] The present invention is further configured such that: the number of the second conductive pad layers is set to a plurality, and the plurality of the second conductive pad layers are distributed at equal intervals, and the spacing between two adjacent second conductive pad layers is equal to the spacing between two adjacent first conductive pad layers.

[0020] This invention also discloses a process for producing conductive modified thermoplastic elastomer composite films, specifically including the following steps:

[0021] Step 1, Conductive Coating: The latex particles are heated to a viscous flow state. The viscous flow latex particles are then extruded onto the surface of the conductive wire using an extrusion device. During this process, the conductive wire moves continuously at a uniform speed, causing the viscous flow latex particles to coat the surface of the conductive wire, forming a latex protective layer. The conductive wire coated with the latex protective layer is then placed in the wire groove at the bottom of the short groove of the spraying tank, and foamed polypropylene is sprayed. After the spraying tank is completed, the conductive wire and the sprayed foamed polypropylene are removed and placed in the long groove of the spraying tank, and foamed polypropylene is sprayed again. After the spraying is completed, the foamed polypropylene wraps around the outside of the latex protective layer, forming an elastic layer, and the semi-finished products of the first conductive pad layer and the second conductive pad layer are obtained. Using a cutting device, slots and blocks are cut into the semi-finished products of the first conductive pad layer and the second conductive pad layer to obtain the finished first conductive pad layer and the second conductive pad layer.

[0022] Step 2, Bonding and Fixing: The modified polyether ether ketone material is put into an extruder to obtain a substrate layer, and the TPE material is put into another extruder to obtain a composite layer. The first conductive pad layer is bonded and fixed to the substrate layer using an adhesive, and the second conductive pad layer is bonded and fixed to the composite layer using an adhesive to obtain a composite frame.

[0023] Step 3, Appearance Processing: One or more of the following materials, namely Dragon Breath Stone, Iron Dragon Stone, and Congling Jade, are ground into ultrafine powder and then screened through a 400-mesh sieve. The resulting colored powder is added to molten polyethylene material, along with a dispersant and an anti-settling agent. After mixing evenly, the mixture is fed into an extruder to obtain a color-tuned elastic layer.

[0024] Step 4, Assembly and Hot Pressing: Adhesive is coated on the surfaces of the substrate layer on both sides of the first conductive pad layer and the surfaces of the two composite layers on both sides of the second conductive pad layer to form an adhesive layer. Then, the color-adjustable elastic layer obtained in Step 3 is placed on the adhesive layer with the bottom composite layer and the adhesive layer with the top of the substrate layer. The substrate layer is then pressed down onto the locking block on the first conductive pad layer and engaged with the locking groove on the second conductive pad layer. The top composite layer is then pressed down onto the locking groove on the second conductive pad layer and engaged with the locking block on the first conductive pad layer. After assembly, a hot press is used for pressing. After pressing, the composite film is obtained.

[0025] (III) Beneficial Effects

[0026] This invention provides a conductive modified thermoplastic elastomer composite film and its manufacturing process. It has the following beneficial effects:

[0027] This conductive modified thermoplastic elastomer composite film and its production process improve the structure of the composite film, making it conductive, more stable, and providing a certain degree of cushioning and shock resistance. This effectively increases the functionality of the composite film, provides multiple layers of protection for the conductive wires, and ensures the quality of the product after it is put into use. Furthermore, the addition of visually appealing colored powder enhances the product's aesthetics and further improves its functionality. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the substrate layer, composite layer, first conductive pad layer, second conductive pad layer, card slot, card block and adhesive layer of the present invention;

[0030] Figure 3 This is a cross-sectional view of the first conductive pad layer structure of the present invention;

[0031] Figure 4 This is a schematic diagram of the spray coating tank of the present invention.

[0032] In the diagram, 1 is the substrate layer; 2 is the composite layer; 3 is the first conductive pad layer; 4 is the second conductive pad layer; 5 is the color-adjustable elastic layer; 6 is the slot; 7 is the card block; 8 is the elastic layer; 9 is the wire fiber; 10 is the conductive wire; 11 is the latex protective layer; 12 is the adhesive layer; 13 is the spraying groove; 14 is the short groove; 15 is the wire groove; and 16 is the long groove. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1-4This invention provides a technical solution: a conductive modified thermoplastic elastomer composite film, comprising a substrate layer 1 and composite layers 2 pressed onto both sides of the substrate layer 1. The substrate layer 1 is made of modified polyetheretherketone (PEEK) material, wherein the modified PEEK is 20% carbon fiber modified. The composite layer 2 is made of TPE material. A first conductive pad layer 3 is bonded and fixed to both the top and bottom of the substrate layer 1. Several first conductive pad layers 3 are provided, and the several first conductive pad layers 3 are evenly spaced. A second conductive pad layer 4, adapted to the first conductive pad layer 3, is fixedly connected to the side of each composite layer 2 closest to the substrate layer 1. Several second conductive pad layers 4 are provided, and the several second conductive pad layers 4 are evenly spaced. The spacing between two adjacent second conductive pad layers 4 is equal to the spacing between two adjacent first conductive pad layers 3. Both the first conductive pad layer 3 and the second conductive pad layer 4 include an elastic layer 8 and a wire fiber 9 from the outside to the inside. The elastic layer 8 is made of foamed polypropylene material. The wire fiber 9 specifically includes a conductive wire 10 and a latex protective layer 11 covering the outside of the conductive wire 10. The first conductive pad layer 3 and the second conductive pad layer 4 in contact form an isolation reinforcement block. A color-tuning elastic layer 5 is filled between two adjacent isolation reinforcement blocks. The color-tuning elastic layer 5 specifically includes colored powder and a polyethylene plastic layer. The colored powder is made by ultra-fine grinding and pulverizing one or more of the following: dragon's breath stone, iron dragon stone, and Congling jade, and then screening it through a 400-mesh sieve.

[0035] As a preferred embodiment, a slot 6 is provided on the side of the first conductive pad layer 3 away from the substrate layer 1, and a locking block 7 that matches the slot 6 is fixedly connected on the side of the second conductive pad layer 4 close to the substrate layer 1. To further explain, the slot 6 and the locking block 7 are used to ensure the relative fixation of the position between the substrate layer 1 and the two composite layers 2, thus ensuring stability during the processing.

[0036] As a preferred embodiment, an adhesive layer 12 is coated on the opposite side of the substrate layer 1 and the two composite layers 2 and between the two adjacent isolation reinforcement blocks. This further illustrates that the adhesive is used to strengthen the connection between the substrate layer 1 and the two composite layers 2 and the color-tuning elastic layer 5.

[0037] The above-mentioned process for producing a conductive modified thermoplastic elastomer composite film specifically includes the following steps:

[0038] Step 1, Conductive Coating: The latex particles are heated to a viscous flow state, and then extruded onto the surface of the conductive wire 10 using an extrusion device. During this process, the conductive wire 10 moves continuously and at a uniform speed, causing the viscous flow latex particles to coat the surface of the conductive wire 10, forming a latex protective layer 11. The conductive wire 10 coated with the latex protective layer 11 is then placed in the wire groove 15 at the bottom of the short groove 14 of the spray tank 13, as shown in the attached diagram. Figure 4As shown, the spraying tank 13 on the left is used for processing the first conductive pad layer 3, and the spraying tank 13 on the right is used for processing the second conductive pad layer 4. Foamed polypropylene is sprayed. After the spraying is completed, the conductive wire 10 and the sprayed foamed polypropylene are taken out and placed in the long groove 16 of the spraying tank 13. The foamed polypropylene is sprayed again. After the spraying is completed, the foamed polypropylene is wrapped around the latex protective layer 11 to form an elastic layer 8, and the semi-finished products of the first conductive pad layer 3 and the second conductive pad layer 4 are obtained. Using a cutting device, slots 6 and blocks 7 are cut out on the semi-finished products of the first conductive pad layer 3 and the second conductive pad layer 4 to obtain the finished products of the first conductive pad layer 3 and the second conductive pad layer 4.

[0039] Step 2, Bonding and Fixing: The modified polyether ether ketone material is put into an extruder to obtain the substrate layer 1. The TPE material is put into another extruder to obtain the composite layer 2. The first conductive pad layer 3 is bonded and fixed to the substrate layer 1 using an adhesive. The second conductive pad layer 4 is bonded and fixed to the composite layer 2 using an adhesive to obtain the composite frame.

[0040] Step 3, Appearance processing: One or more of the following materials, namely Dragon Breath Stone, Iron Dragon Stone, and Congling Jade, are ground into ultrafine powder and then screened through a 400-mesh sieve. The resulting colored powder is added to the molten polyethylene material, along with a dispersant and an anti-settling agent. After mixing evenly, the mixture is fed into an extruder to obtain the color-adjustable elastic layer 5.

[0041] Step 4, Assembly and Hot Pressing: Adhesive is coated on the surfaces of the substrate layer 1 on both sides of the first conductive pad layer 3 and the surfaces of the two composite layers 2 on both sides of the second conductive pad layer 4, forming an adhesive layer 12. Then, the color-adjusting elastic layer 5 obtained in Step 3 is placed on the adhesive layer 12 of the bottom composite layer 2 and the adhesive layer 12 of the top of the substrate layer 1. Then, the substrate layer 1 is pressed down onto the locking block 7 on the first conductive pad layer 3 and the locking groove 6 on the second conductive pad layer 4. Then, the top composite layer 2 is pressed down onto the locking groove 6 on the second conductive pad layer 4 and locked onto the locking block 7 on the first conductive pad layer 3. After assembly, a hot press is used for pressing. After pressing, the composite film is obtained.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A conductive modified thermoplastic elastomer composite film, comprising a substrate layer (1) and a composite layer (2) laminated on both sides of the substrate layer (1), characterized in that: The substrate layer (1) is made of modified polyetheretherketone (PEEK) material, and the composite layer (2) is made of TPE material. A first conductive pad layer (3) is bonded to both the top and bottom of the substrate layer (1). Several first conductive pad layers (3) are provided, and they are evenly spaced. A second conductive pad layer (4) adapted to the first conductive pad layer (3) is fixedly connected to the side of each composite layer (2) closest to the substrate layer (1). The first conductive pad layer (3) and the second conductive pad layer (4) in contact form an isolation reinforcement block. A color-adjusting elastic layer (5) is filled between two adjacent isolation reinforcement blocks. A slot (6) is provided on the side of the first conductive pad layer (3) away from the substrate layer (1), and a locking block (7) adapted to the slot (6) is fixedly connected to the side of the second conductive pad layer (4) closest to the substrate layer (1). The first conductive pad layer (3)... Both the second conductive pad layer (4) and the second conductive pad layer (4) consist of an elastic layer (8) and a conductive fiber (9) from the outside to the inside. The elastic layer (8) is made of foamed polypropylene material. The conductive fiber (9) specifically includes a conductive wire (10) and a latex protective layer (11) covering the conductive wire (10). The color-tuning elastic layer (5) specifically includes colored powder and a polyethylene plastic layer. The colored powder is made by ultra-fine grinding and pulverizing one or more of the following materials: dragon's breath stone, iron dragon stone, and Congling jade, and then screening through a 400-mesh sieve. The substrate layer (1) and the two composite layers (2) are coated with an adhesive layer (12) on opposite sides and between two adjacent isolation reinforcing blocks. The number of second conductive pad layers (4) is set to several, and the several second conductive pad layers (4) are distributed at equal intervals. The distance between two adjacent second conductive pad layers (4) is equal to the distance between two adjacent first conductive pad layers (3).

2. A production process for the conductive modified thermoplastic elastomer composite film as described in claim 1, characterized in that: Specifically, the following steps are included: Step 1, Conductive Coating: The latex particles are heated to a viscous flow state, and the viscous flow latex particles are extruded onto the surface of the conductive wire (10) using an extrusion device. During the process, the conductive wire (10) moves continuously at a uniform speed, so that the viscous flow latex particles coat the surface of the conductive wire (10) to form a latex protective layer (11). Then, the conductive wire (10) coated with the latex protective layer (11) is placed in the wire groove at the bottom of the short groove of the spray tank, and foamed polypropylene is sprayed. After the spray tank is completed, the conductive wire (10) and the sprayed polypropylene are placed together. The foamed polypropylene is taken out and placed in the long groove of the spraying tank. The foamed polypropylene is sprayed again. After the spraying is completed, the foamed polypropylene is wrapped around the outside of the latex protective layer (11) to form an elastic layer (8). The semi-finished products of the first conductive pad layer (3) and the second conductive pad layer (4) are obtained. Using a cutting device, the slot (6) and the block (7) are cut out on the semi-finished products of the first conductive pad layer (3) and the second conductive pad layer (4) to obtain the finished products of the first conductive pad layer (3) and the second conductive pad layer (4). Step 2, bonding and fixing: The modified polyether ether ketone material is put into an extruder to obtain a substrate layer (1), and the TPE material is put into another extruder to obtain a composite layer (2). The first conductive pad layer (3) is bonded and fixed to the substrate layer (1) using an adhesive, and the second conductive pad layer (4) is bonded and fixed to the composite layer (2) using an adhesive to obtain a composite frame. Step 3, Appearance processing: One or more of the following materials are ground into ultrafine powder and then screened through a 400-mesh sieve. The resulting colored powder is added to the molten polyethylene material. Dispersant and anti-settling agent are added and mixed evenly. The mixture is then fed into an extruder to obtain a color-tuned elastic layer (5). Step 4, Assembly and Hot Pressing: Adhesive is coated on the surfaces of the substrate layer (1) on both sides of the first conductive pad layer (3) and the surfaces of the two composite layers (2) on both sides of the second conductive pad layer (4) to form an adhesive layer (12). Then, the color-adjusting elastic layer (5) obtained in Step 3 is placed on the adhesive layer (12) of the bottom composite layer (2) and the adhesive layer (12) of the top substrate layer (1). Then, the substrate layer (1) is pressed down into the slot (6) on the first conductive pad layer (3) and engaged with the block (7) on the second conductive pad layer (4). Then, the composite layer (2) at the top is pressed down into the slot (6) on the second conductive pad layer (4) and engaged with the block (7) on the first conductive pad layer (3). After assembly, a hot press is used for pressing. After pressing, the composite film can be obtained.

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