Enhanced PVC / TPU space composite material and preparation method thereof

Abstract

This invention provides an enhanced PVC / TPU space composite material, comprising: a space composite material body, wherein a space mesh is disposed inside the space composite material body, and both sides of the surface of the space mesh are coated with PU paste. A cast TPU film is adhered to one side of the PU paste-coated space mesh surface, and a PVC mesh layer is adhered to the other side. This invention provides an enhanced PVC / TPU space composite material and its preparation method, using different materials on both sides. This material combines the advantages of both PVC and TPU, meeting the needs of some special fields. Using PVC mesh as the surface layer, in addition to high strength, effectively improves the problem of easy cracking and air leakage of single-layer PVC film. Compared with TPU material, it is lower in cost, has better weather resistance, and is easier to process in subsequent steps. Using TPU film as the bottom layer, it has better wear resistance for long-term contact with the ground, which not only extends the service life of the material but is also more environmentally friendly.

Description

Technical Field

[0001] This invention relates to the field of space composite materials, and more particularly to a reinforced PVC / TPU space composite material and its preparation method. Background Technology

[0002] Space composite materials are a new type of material with a three-dimensional structure. They are mainly used to manufacture products such as gymnastics mats and surfboards. In order to provide good air tightness, the surface of the space base fabric needs to be coated with a film. The general structure is film layer-base fabric-film layer.

[0003] Currently, conventional PVC space composite materials on the market generally have poor wear resistance and low-temperature folding resistance. After long-term accumulation, the folded parts are prone to creases or even cracks and air leakage, which limits their application in some high-performance fields.

[0004] Although TPU materials have better wear resistance and flexural strength than PVC materials, most TPU materials on the market are aromatic, which have poor weather resistance, are prone to yellowing and hydrolysis. On the other hand, high-performance aliphatic TPU materials are expensive and not suitable for most consumers. Furthermore, the post-processing of TPU materials requires specific adhesives, which places high demands on the operators and can easily lead to problems such as insufficient strength and product cracking.

[0005] Therefore, it is necessary to provide an enhanced PVC / TPU space composite material and its preparation method to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides an enhanced PVC / TPU space composite material and its preparation method, which solves the problems of poor low-temperature folding resistance of existing conventional PVC space composite materials, easy cracking and air leakage after long-term folding and stacking, and high price and insufficient weather resistance of pure TPU materials.

[0007] To solve the above-mentioned technical problems, the present invention provides an enhanced PVC / TPU space composite material, comprising:

[0008] The main body is a spatial composite material, and a spatial mesh is provided inside the main body. Both sides of the surface of the spatial mesh are covered with PU paste. A cast TPU film is bonded to one side of the spatial mesh surface covered with PU paste, and a PVC mesh layer is bonded to the other side.

[0009] A method for preparing a reinforced PVC / TPU space composite material includes the following steps:

[0010] S1. Spatial mesh coating treatment: Apply PU paste to both sides of the base fabric, dry it, and roll it up for later use;

[0011] S2. Bottom layer composite: TPU film material is preferred, which has lower cost and is easier to operate than mesh reinforcement. After heating one side of the coated space mesh, it is laminated with the cast TPU film to obtain a single-sided TPU space mesh composite material semi-finished product for later use.

[0012] S3. Preparation of surface PVC material: PVC mesh composite material is preferred, which has high strength and is more durable;

[0013] S4. Finished Product Lamination: The single-sided TPU space fabric semi-finished product is sent as the bottom layer. After preheating to 100-130℃, it is bonded together with the preheated PVC mesh layer after being heated in a set of large cylinders. The bottom semi-finished product is heated in the first large cylinder, and the contact temperature between the TPU film layer and the heated roller surface is below 130℃, which effectively prevents the TPU film from sticking to the roller surface. When it is bonded in the second large cylinder, the PVC mesh layer contacts the heated roller surface at a temperature of 170-190℃, which effectively ensures the bonding strength between the PVC material layer and the space mesh fabric.

[0014] Preferably, the temperature of the group of large cylinders in S4 is 170-190℃.

[0015] Preferably, in step S2, a processing device is required for bonding and drying the space mesh fabric with PU paste to the cast TPU film. The processing device includes a base, a take-up and release assembly is installed on one side of the base surface, and a rotating device is provided at the center of the base surface. The rotating device includes a hydraulic telescopic rod, and a U-shaped fixing frame is connected to the top of the hydraulic telescopic rod. A rotating component is rotatably connected between the two sides of the inner wall of the U-shaped fixing frame via a rotating shaft. A placement plate is connected to one side of the rotating component. Limiting components are provided on both sides of the placement plate. A pressing device is provided above the placement plate. A winding assembly is provided on the surface of the base and on the left side opposite to the placement plate. A drying device is provided on the surface of the base and above the winding assembly and the take-up and release assembly.

[0016] Preferably, the take-up and release assembly includes a fixed frame, and take-up and release rollers are arranged between the two sides of the inner wall of the fixed frame, with detachable parts provided at both ends of the take-up and release rollers.

[0017] Preferably, a fixing member is provided between the U-shaped fixing frame and the rotating member.

[0018] Preferably, the limiting component includes a connecting rod, a partition block is connected to the center of the surface of the connecting rod, a connecting sleeve is fitted on both sides of the surface of the connecting rod and on both sides of the partition block, an L-shaped connecting rod is connected to one side of each of the two connecting sleeves, a limiting plate is connected to one end of the L-shaped connecting rod, and a fixing bolt is provided on the surface of the connecting sleeve.

[0019] Preferably, the extrusion device includes a C-shaped connecting rod, one end of which is connected to a hydraulic rod, and the bottom end of which is connected to an extrusion plate.

[0020] Preferably, a positioning component is provided on one side of the limiting plate. The positioning component includes a U-shaped connecting rod, one end of which is connected to a positioning roller. The winding component includes two hydraulic lifting rods, a U-shaped fixing frame is connected between the two hydraulic lifting rods, a winding roller is provided between the U-shaped fixing frames, and limiting components are connected to both sides inside the U-shaped fixing frame.

[0021] Preferably, the drying device includes an air pump, the input end and the output end of the air pump are respectively connected to an air inlet pipe and an air outlet pipe, one end of the air outlet pipe is connected to an air delivery pipe, and the surface of the air delivery pipe is provided with multiple air outlets.

[0022] Compared with related technologies, the reinforced PVC / TPU space composite material and its preparation method provided by the present invention have the following beneficial effects:

[0023] This invention provides an enhanced PVC / TPU space composite material and its preparation method. Different materials are used on both sides. This material combines the advantages of PVC and TPU and meets the needs of some special fields.

[0024] Using PVC mesh material as the surface layer not only provides high strength but also effectively improves the problem of easy cracking and air leakage of single-layer PVC film. Compared with TPU material, it has lower cost, better weather resistance, and is easier to process in subsequent steps. Using TPU film as the bottom layer provides better wear resistance for long-term contact with the ground, which not only extends the service life of the material but is also more environmentally friendly.

[0025] Compared to PVC mesh double-layer reinforced space composite materials, the material prepared by this process has a significantly reduced basis weight. Under the same specifications of base fabric, the basis weight is reduced by about 30%, resulting in lighter finished products that are easier to carry. Compared to double-sided TPU space composite materials, this structural material is easier to process in subsequent steps, requires less skill from workers, has better bonding strength, and improves the wear resistance and adaptability of the material to subsequent processing, thereby increasing the service life of the product. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a first embodiment of an enhanced PVC / TPU space composite material and its preparation method provided by the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of a second embodiment of an enhanced PVC / TPU space composite material and its preparation method provided by the present invention;

[0028] Figure 3 for Figure 2 The enlarged schematic diagram of part A shown below;

[0029] Figure 4 for Figure 2 The enlarged schematic diagram of section B is shown below;

[0030] Figure 5 for Figure 2 The enlarged schematic diagram of section C is shown below;

[0031] Figure 6 for Figure 2 The diagram shows the overall three-dimensional structure of the device.

[0032] Numbered in the diagram: 1. Base

[0033] 2. Take-up and release assembly; 21. Fixing frame; 22. Take-up and release rollers; 23. Disassembly parts.

[0034] 3. Rotating device; 31. Hydraulic telescopic rod; 32. U-shaped fixing frame; 33. Rotating component; 34. Placement plate; 35. Fixing component.

[0035] 4. Limiting assembly; 41. Connecting rod; 42. Divider block; 43. Connecting sleeve; 44. L-shaped connecting rod; 45. Limiting plate; 46. Fixing bolt.

[0036] 5. Extrusion device; 51. C-shaped connecting rod; 52. Hydraulic rod; 53. Extrusion plate.

[0037] 6. Positioning assembly; 61. U-shaped connecting rod; 62. Positioning roller.

[0038] 7. Rewinding assembly; 71. Hydraulic lifting rod; 72. U-shaped fixing frame; 73. Rewinding roller; 74. Limiting component.

[0039] 8. Drying device; 81. Air pump; 82. Air inlet pipe; 83. Air outlet pipe; 84. Air delivery pipe; 85. Air outlet head.

[0040] 9. Electric motor

[0041] 10. Spatial composite material body, 11. Spatial mesh fabric, 12. PU paste, 13. Cast TPU film, 14. PVC mesh surface layer. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0043] Please refer to the following: Figure 1 ,in, Figure 1This is a schematic diagram of the structure of a first embodiment of an enhanced PVC / TPU space composite material and its preparation method provided by the present invention. An enhanced PVC / TPU space composite material includes:

[0044] The space composite material body 10 has a space mesh 11 inside. Both sides of the surface of the space mesh 11 are covered with PU paste 12. A cast TPU film 13 is bonded to one side of the space mesh surface of the upper PU paste 12, and a PVC mesh layer 14 is bonded to the other side.

[0045] Compared with related technologies, the reinforced PVC / TPU space composite material and its preparation method provided by the present invention have the following beneficial effects:

[0046] This invention provides an enhanced PVC / TPU space composite material and its preparation method. Different materials are used on both sides. This material combines the advantages of PVC and TPU and meets the needs of some special fields.

[0047] Using PVC mesh material as the surface layer not only provides high strength but also effectively improves the problem of easy cracking and air leakage of single-layer PVC film. Compared with TPU material, it has lower cost, better weather resistance, and is easier to process in subsequent steps. Using TPU film as the bottom layer provides better wear resistance for long-term contact with the ground, which not only extends the service life of the material but is also more environmentally friendly.

[0048] Compared to PVC mesh double-layer reinforced space composite materials, the material prepared by this process has a significantly lower basis weight, resulting in lighter finished products that are easier to carry. Compared to double-sided TPU space composite materials, this structural material is easier to process in subsequent stages, requires less skill from workers, and has better bonding strength. Example

[0049] Please refer to the following: Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 Based on the first embodiment of this application which provides an enhanced PVC / TPU space composite material and its preparation method, the second embodiment of this application proposes another enhanced PVC / TPU space composite material and its preparation method. The second embodiment is merely a preferred embodiment of the first embodiment, and its implementation will not affect the separate implementation of the first embodiment.

[0050] Specifically, the second embodiment of this application provides a reinforced PVC / TPU space composite material and its preparation method, which differs in that the preparation method of the reinforced PVC / TPU space composite material includes the following steps:

[0051] S1. Coating treatment of space mesh fabric 11: Apply PU paste 12 to both sides of the base fabric, dry and roll it up for later use;

[0052] S2, Bottom Layer Composite: TPU film material is preferred, which has lower cost and is easier to operate than mesh reinforcement. After heating one side of the coated space mesh, it is laminated with the cast TPU film 13 to obtain a single-sided TPU space mesh composite material semi-finished product for later use.

[0053] S3. Preparation of surface PVC material: PVC mesh composite material is preferred, which has high strength and is more durable;

[0054] S4. Finished Product Lamination: The single-sided TPU space fabric semi-finished product is sent as the bottom layer. After being heated to a preheated temperature of 100-130℃, it is bonded together with the preheated PVC mesh layer 14 after being heated by a set of large cylinders. The bottom semi-finished product is heated by the first large cylinder, and the contact temperature between the TPU film layer and the heated roller surface is below 130℃, which effectively avoids the TPU film sticking to the roller surface. When it is bonded by the second large cylinder, the PVC mesh layer contacts the heated roller surface at a temperature of 170-190℃, which effectively ensures the bonding strength between the PVC material layer and the space mesh fabric.

[0055] The temperature of the group of large cylinders in S4 is 170-190℃.

[0056] In step S2, a processing device is required for pasting and drying the space mesh 11 with PU paste 12 and the cast TPU film 13. The processing device includes a base 1, a take-up and release assembly 2 is installed on one side of the surface of the base 1, and a rotating device 3 is set at the center of the surface of the base 1. The rotating device 3 includes a hydraulic telescopic rod 31, and a U-shaped fixing frame 32 is connected to the top of the hydraulic telescopic rod 31. A rotating component 33 is rotatably connected between the two sides of the inner wall of the U-shaped fixing frame 32 through a rotating shaft. A placement plate 34 is connected to one side of the rotating component 33. Limiting components 4 are set on both sides of the placement plate 34. A pressing device 5 is set above the placement plate 34. A winding assembly 7 is set on the surface of the base 1 and on the left side opposite to the placement plate 34. A drying device 8 is set on the surface of the base 1 and above the winding assembly 7 and the take-up and release assembly 2.

[0057] The hydraulic telescopic rod 31 is fixedly connected to the center of the base 1. The use of the hydraulic telescopic rod 31 facilitates the adjustment of the height of the placement plate 34. The use of the rotating part 33 allows for the adjustment of the angle of the placement plate 34. When the material is being extruded and wound, the winding of the winding roller 73 and the pulling of the angle of the placement plate 34 can achieve a secondary extrusion effect. In use, the hydraulic telescopic rod 31 is activated to push the placement plate 34 to adjust the angle. After the height of the placement plate 34 is adjusted, the operation of the hydraulic telescopic rod 31 is stopped. Then, the angle of the placement plate 34 is adjusted by pulling it under the action of the rotating part 33. After the angle of the placement plate 34 is adjusted, the rotating part 33 is fixed to the U-shaped fixing frame 32 using the fixing part 35.

[0058] The take-up and release assembly 2 includes a fixed frame 21, and a take-up and release roller 22 is provided between the two sides of the inner wall of the fixed frame 21. Both ends of the take-up and release roller 22 are provided with disassembly parts 23.

[0059] The fixing frame 21 is connected to the surface of the base 1. The disassembly part 23 can be used to replace the space mesh fabric wrapped on the take-up and release roller 22. In use, the take-up and release roller 22 with the space mesh fabric can be installed with the fixing frame 21 under the action of the disassembly part 23.

[0060] A fixing member 35 is provided between the U-shaped fixing frame 32 and the rotating member 33.

[0061] The limiting component 4 includes a connecting rod 41, a partition block 42 is connected to the center of the surface of the connecting rod 41, a connecting sleeve 43 is fitted on the surface of the connecting rod 41 and on both sides of the partition block 42, an L-shaped connecting rod 44 is connected to one side of each of the two connecting sleeves 43, a limiting plate 45 is connected to one end of the L-shaped connecting rod 44, and a fixing bolt 46 is provided on the surface of the connecting sleeve 43.

[0062] Rectangular blocks are connected to both ends of the connecting rod 41. One end of the rectangular block is connected to the bottom of the placement plate 34. The use of the dividing block 42 can divide the connecting rod 41 into two equal parts. When adjusting the width of the placement plate 34, the limiting plate 45 is pulled to the side. When the limiting plate 45 moves, it drives the L-shaped connecting rod 44 to move. When the L-shaped connecting rod 44 moves, it drives the connecting sleeve 43 to move on the surface of the connecting rod 41. After adjusting the distance of the limiting plate 45, the fixing bolt 46 is passed through the connecting sleeve 43 and fixedly connected to the connecting rod 41.

[0063] The extrusion device 5 includes a C-shaped connecting rod 51, one end of which is connected to a hydraulic rod 52, and the bottom end of the hydraulic rod 52 is connected to an extrusion plate 53.

[0064] After the PU paste 12 is applied to the spatial mesh fabric and the cast TPU film 13 is bonded, the hydraulic rod 52 is activated to drive the extrusion plate 53 to extrude and shape the spatial mesh fabric on the surface of the placement plate 34.

[0065] A positioning component 6 is provided on one side of the limiting plate 45. The positioning component 6 includes a U-shaped connecting rod 61. One end of the U-shaped connecting rod 61 is connected to a positioning roller 62. The winding component 7 includes two hydraulic lifting rods 71. A U-shaped fixing frame 72 is connected between the two hydraulic lifting rods 71. A winding roller 73 is provided between the U-shaped fixing frames 72. Limiting components 74 are connected to both sides inside the U-shaped fixing frame 72.

[0066] A motor 9 is installed on one side of the U-shaped fixing frame 72. When the processed material is being wound up, one end of the material is connected to the winding roller 73, and then the motor 9 is started to drive the winding roller 73 to rotate so that the material can be wound up.

[0067] The drying device 8 includes an air pump 81, with an air inlet pipe 82 and an air outlet pipe 83 connected to the input and output ends of the air pump 81, respectively. One end of the air outlet pipe 83 is connected to an air delivery pipe 84, and a plurality of air outlets 85 are provided on the surface of the air delivery pipe 84.

[0068] The working principle of the reinforced PVC / TPU space composite material and its preparation method provided by this invention is as follows:

[0069] When in use, when the material is being dried, the air pump 81 is started to deliver external gas through the air inlet pipe 82 and the air outlet pipe 83 to the inside of the air delivery pipe 84. After the gas is delivered to the inside of the air delivery pipe 84, the pressure of the air pump 81 is used to deliver the gas inside the air delivery pipe 84 to the surface of the material through multiple air outlets 85 for drying.

[0070] Compared with related technologies, the reinforced PVC / TPU space composite material and its preparation method provided by the present invention have the following beneficial effects:

[0071] This invention provides an enhanced PVC / TPU space composite material and its preparation method. The base 1 is provided with a take-up and untake-down assembly 2, a take-up assembly 7 and a drying device 8 on both sides of the surface. The two parts work together to allow the space mesh 11 to be quickly dried and rolled up after being coated with PU paste 12, preventing sticking when it is not completely dry.

[0072] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for preparing a reinforced PVC and TPU space composite material, wherein the reinforced PVC and TPU space composite material comprises: A space composite material body, wherein a space mesh is disposed inside the space composite material body, and both sides of the surface of the space mesh are coated with PU paste. A cast TPU film is bonded to one side of the space mesh with PU paste, and a PVC mesh layer is bonded to the other side. The invention is characterized by the following steps: S1. Space mesh fabric 11 coating treatment: PU paste is applied to both sides of the base fabric, dried, and then rolled up for use; S2. Cast TPU film lamination: After heating one side of the coated space mesh fabric, it is laminated with a cast TPU film to obtain a single-sided TPU space fabric composite material semi-finished product for later use. S3. Preparation of PVC mesh surface layer: PVC mesh composite material is used; S4. Finished Product Lamination: The single-sided TPU space fabric composite material semi-finished product is sent as the bottom layer. After being heated to a preheating temperature of 100-130℃, it is bonded together with the preheated PVC mesh surface layer after being heated by a second large roller. The bottom layer is heated by the first large roller, and the TPU film layer is in contact with the heated roller surface. When it is bonded by the second large roller, the PVC mesh surface layer is in contact with the heated roller surface at a temperature of 170-190℃. In step S2, a processing device is required for bonding and drying the space mesh fabric with PU paste and the cast TPU film. The processing device includes a base, a take-up and release assembly installed on one side of the base surface, a rotating device located at the center of the base surface, and a hydraulic telescopic rod connected to the top of the hydraulic telescopic rod with a U-shaped fixing frame. A rotating component is rotatably connected between the two sides of the inner wall of the U-shaped fixing frame via a rotating shaft. A placement plate is connected to one side of the rotating component, and limit assemblies are provided on both sides of the placement plate. A pressing device is provided above the placement plate. A winding assembly is provided on the surface of the base and on the left side opposite to the placement plate. A drying device is provided on the surface of the base and above both the winding assembly and the take-up and release assembly. The take-up and release assembly includes a fixed frame, and take-up and release rollers are arranged between the two sides of the inner wall of the fixed frame. Both ends of the take-up and release rollers are provided with disassembly parts. A fixing element is provided between the U-shaped fixing frame and the rotating component; The limiting component includes a connecting rod, a partition block is connected to the center of the surface of the connecting rod, a connecting sleeve is fitted on both sides of the surface of the connecting rod and the partition block, an L-shaped connecting rod is connected to one side of each of the two connecting sleeves, a limiting plate is connected to one end of the L-shaped connecting rod, and a fixing bolt is provided on the surface of the connecting sleeve. The extrusion device includes a C-shaped connecting rod, one end of which is connected to a hydraulic rod, and the bottom end of which is connected to an extrusion plate.

2. The method for preparing the reinforced PVC and TPU space composite material according to claim 1, characterized in that, A positioning component is provided on one side of the limiting plate. The positioning component includes a U-shaped connecting rod, one end of which is connected to a positioning roller. The winding component includes two hydraulic lifting rods, and a U-shaped fixing frame is connected between the two hydraulic lifting rods. A winding roller is provided between the U-shaped fixing frames. Limiting components are connected to both sides inside the U-shaped fixing frame.

3. The method for preparing the reinforced PVC and TPU space composite material according to claim 1, characterized in that, The drying device includes an air pump, with an air inlet pipe and an air outlet pipe connected to the input and output ends of the air pump, respectively. One end of the air outlet pipe is connected to an air delivery pipe, and the surface of the air delivery pipe is provided with multiple air outlets.

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