A kind of thermoplastic polyurethane floor and its production process

Abstract

The invention discloses a thermoplastic polyurethane floor and a production process thereof, belonging to the technical field of thermoplastic polyurethane floor. The thermoplastic polyurethane base layer comprises a thermoplastic polyurethane surface layer on at least one side of the thermoplastic polyurethane base layer; the thickness of the thermoplastic polyurethane surface layer is 1 / 10 to 1 / 5 of the thickness of the thermoplastic polyurethane base layer; the thermoplastic polyurethane base layer comprises two groups of elastic base layers, the elastic base layer comprises a skeleton, a thermoplastic polyurethane sealing layer and a polyurethane foaming array, the skeleton comprises a glass fiber grid, one side of the glass fiber grid is thermally bonded with a glass fiber net, the side of the glass fiber net away from the glass fiber grid is integrally made with a glass fiber convex nail, the glass fiber convex nail is a T-shaped structure; the glass fiber convex nail is arranged on the inner side of the thermoplastic polyurethane cushion layer; the thermoplastic polyurethane floor and the production process thereof of the invention can reduce the amount of thermoplastic polyurethane used and reduce the shrinkage rate of the floor, while ensuring the elasticity and resilience of the floor.

Description

Technical Field

[0001] The invention specifically relates to a thermoplastic polyurethane floor and a production process thereof, and belongs to the technical field of thermoplastic polyurethane floors. Background Art

[0002] Thermoplastic polyurethane flooring is made of thermoplastic polyurethane and other additives. Thermoplastic polyurethane flooring has excellent wear resistance, scratch resistance and pollution resistance, can maintain the beauty and gloss of the flooring for a long time, and also has good elasticity and resilience, can relieve the pressure and fatigue of the feet, and improve the comfort of walking. In addition, it has good sound insulation and heat insulation, can reduce the influence of noise and temperature difference, and create a quiet and comfortable indoor environment. Existing thermoplastic polyurethane flooring, such as Chinese patent publication number: CN111890743A, discloses a thermoplastic polyurethane flooring, which includes a wear-resistant layer, a printing layer and a base material layer; the wear-resistant layer and the printing layer are made of thermoplastic polyurethane material, and the thermoplastic polyurethane flooring of this structure can control the hardness of the flooring by the formula of the base material layer; but the comfort of the flooring of this structure is general. In addition, in order to improve the comfort of the existing thermoplastic polyurethane flooring, it is necessary to increase the thickness of the flooring to achieve good elasticity and resilience, which is easy to increase the production cost of the flooring and increase the shrinkage rate of the flooring. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a thermoplastic polyurethane floor and a production process thereof, which can reduce the amount of thermoplastic polyurethane used and the shrinkage rate of the floor, while ensuring the elasticity and resilience of the floor.

[0004] The thermoplastic polyurethane floor of the present invention comprises a thermoplastic polyurethane base layer, at least one side of the thermoplastic polyurethane base layer is provided with a thermoplastic polyurethane surface layer; the thickness of the thermoplastic polyurethane surface layer is 1 / 10 to 1 / 5 of the thickness of the thermoplastic polyurethane base layer; the thermoplastic polyurethane base layer provides the elasticity and resilience requirements of the floor, thereby reducing the thickness of the thermoplastic polyurethane surface layer, thereby reducing the shrinkage rate of the floor; the thermoplastic polyurethane base layer comprises two groups of elastic base layers, and the elastic base layers comprise:

[0005] A frame body, the frame body comprising a glass fiber grid, one side of the glass fiber grid is thermally bonded with a glass fiber mesh, and one side of the glass fiber mesh away from the glass fiber grid is integrally formed with a glass fiber convex nail, and the glass fiber convex nail is a T-shaped structure;

[0006] Thermoplastic polyurethane sealing layer, the glass fiber convex nails are arranged on the inner side of the thermoplastic polyurethane cushion layer, and the glass fiber mesh is thermally bonded to the surface of the thermoplastic polyurethane sealing layer;

[0007] A polyurethane foam array, wherein the polyurethane foam array is filled inside the glass fiber grid and flows between the glass fiber net and the glass fiber grid, wherein the polyurethane foam array is bonded to the glass fiber net, and at the same time, the polyurethane foam array is heat-pressed and bonded to the thermoplastic polyurethane sealing layer through the mesh holes of the glass fiber net; the glass fiber grid can separate the foamed thermoplastic polyurethane into a foam array, and when the foam array is compressed, a large deformation can be generated, and during the deformation process, the grid holes of the glass fiber grid and the glass fiber net can limit the foam array, and the deformation amount of the foam array can be limited, and the skeleton body controls the shrinkage rate of the thermoplastic polyurethane base layer; in addition, the glass fiber net can disperse the force of a certain area to the surrounding foam array, thereby increasing the service life of the foam array; the glass fiber convex nails and the glass fiber net can perform three-dimensional restraint on the thermoplastic polyurethane sealing layer; the peeling resistance between the thermoplastic polyurethane base layers can be prevented, and the shrinkage rate of the floor can be reduced at the same time;

[0008] The two groups of glass fiber grids of the elastic base layer are bonded together by adhesive; the thermoplastic polyurethane surface layer and the thermoplastic polyurethane base layer are bonded together by an interface agent.

[0009] Furthermore, the fiberglass grid comprises a row of fiberglass warp sheets and a row of fiberglass weft sheets which are thermally bonded.

[0010] Furthermore, the thermoplastic polyurethane foam array is formed by mixing, kneading and extruding thermoplastic polyurethane foam materials; the content ratio of thermoplastic polyurethane ordinary particles to thermoplastic polyurethane foam particles in the thermoplastic polyurethane foam material is 1:5-7.

[0011] Furthermore, the thickness of the glass fiber grid is 5 to 10 times the thickness of the glass fiber mesh; the aperture of the glass fiber mesh is 0.1 to 0.5 cm; the spacing between adjacent glass fiber warp sheets is 2 to 5 cm; and the spacing between adjacent glass fiber weft sheets is 2 to 5 cm.

[0012] A thermoplastic polyurethane floor production process is used to produce thermoplastic polyurethane floor, and the production process is specifically as follows:

[0013] S1: skeleton processing, unwinding the glass fiber grid onto the processing platform, then rolling the adhesive on the top surface of the glass fiber grid, then unwinding the glass fiber mesh, and hot pressing the glass fiber grid and the glass fiber mesh together through a hot pressing roller to complete the skeleton processing; the glass fiber mesh and the glass fiber grid are hot pressed together to form a whole, thereby obtaining the internal support skeleton of the elastic base layer;

[0014] S2: elastic base processing, first, ordinary thermoplastic polyurethane particles are fed into an extrusion molding machine to obtain a thermoplastic polyurethane sealing layer, and the raw materials of the polyurethane foam array are fed into another extrusion molding machine to obtain a polyurethane foam array, and then the thermoplastic polyurethane sealing layer is pressed with the outer surface of the glass fiber mesh, so that the glass fiber mesh is embedded in the outer surface of the thermoplastic polyurethane sealing layer; then, the polyurethane foam array is pressed with the skeleton, and finally, the elastic base is obtained after hot pressing and molding by hot pressing and shaping rollers, and the elastic base is rolled to obtain an elastic base coil;

[0015] S3: Thermoplastic polyurethane base processing, unwinding the elastic base coil, then rolling the glue onto the fiberglass grid through a glue coating roller, and hot-melt bonding the polyurethane foam array together through a hot melt roller, specifically: controlling the temperature of the hot melt roller at 130°C, the bubble particles on the surface of the polyurethane foam array burst, so that the particles of the two groups of elastic bases are adhered together, thereby forming a buffer membrane between the two groups of polyurethane foam arrays; then, the two groups of elastic bases are pressed together by a cold pressing roller, so that the glue on the fiberglass grid is bonded together, and the edges are trimmed to obtain the thermoplastic polyurethane base;

[0016] S4: thermoplastic polyurethane surface layer processing, sending ordinary thermoplastic polyurethane particles into an extrusion molding machine to obtain a thermoplastic polyurethane surface layer;

[0017] S5: The floor cloth is formed by coating the interface agent on one or both sides of the thermoplastic polyurethane base layer with a rubber roller, and then the thermoplastic polyurethane surface layer and the thermoplastic polyurethane base layer are pressed together by hot-pressing rollers or cold-pressing rollers.

[0018] Furthermore, the lamination process of the thermoplastic polyurethane sealing layer and the outer surface of the glass fiber mesh is as follows: the skeleton body is fed into a pair of forming rollers, wherein the gap between the pair of forming rollers is the sum of the thickness of the glass fiber mesh and the length of the glass fiber convex nails, and then, after the die head of the extrusion molding machine discharges the material, the rubber is fed into the top surface of the skeleton body, and the rubber covers the entire glass fiber convex nails and the outer surface of the glass fiber mesh, and the rubber is pressed by the pair of forming rollers so that the rubber enters the inner surface of the glass fiber mesh, thereby completing the integral molding of the thermoplastic polyurethane sealing layer and the glass fiber mesh; during processing, the skeleton body is first fed into the pair of forming rollers, and then, the ordinary thermoplastic polyurethane particles and the additives are mixed and melted by the extrusion molding machine, and a polyurethane thin layer is extruded through the die head, and then, the polyurethane thin layer is fed into the pair of forming rollers, and the glass fiber convex nails are pressed into the uncured polyurethane thin layer by the pair of forming rollers, and at the same time, the glass fiber mesh is pressed onto the surface of the polyurethane thin layer, so that the skeleton body and the thermoplastic polyurethane sealing layer are hot-pressed into one by the pair of forming rollers.

[0019] Furthermore, the lamination process of the polyurethane foam array and the frame body is as follows: after the die head of the extrusion molding machine discharges the material, the material is first divided by a groove roller, and the groove roller is pressed onto the surface of the glass fiber warp sheet or glass fiber weft sheet of the glass fiber grid, and the rubber material of the polyurethane foam array is fed into the grid holes of the glass fiber grid, so that the polyurethane foam array protrudes 0.2~0.5mm from the surface of the glass fiber grid; then, the polyurethane foam array that has been divided and filled is fed to a flat roller for pressing to complete the pre-pressing; during processing, the ingredients are mixed, melted and extruded by the extrusion molding machine, and a polyurethane foam thin layer is extruded through the die head, and then the polyurethane The ester foamed thin layer is fed into the groove roller, which is pressed onto the surface of the glass fiber warp sheet or glass fiber weft sheet of the glass fiber grid to prevent the polyurethane foam material from being squeezed onto the surface of the glass fiber grid. At the same time, the groove roller separates the polyurethane foamed thin layer, and the separated polyurethane foam material enters between adjacent glass fiber warp sheets or between adjacent glass fiber weft sheets; and is fully filled into the grid holes and the glass fiber mesh of the glass fiber grid through surface extrusion of the groove roller; the thickness of the polyurethane foam array protruding from the surface of the glass fiber grid can be controlled by controlling the outer diameter of the position of the groove roller facing the grid hole and the outer diameter of the position of the groove roller facing the glass fiber warp sheet or glass fiber weft sheet.

[0020] Compared with the prior art, the thermoplastic polyurethane floor and its production process of the present invention adopt a thick thermoplastic polyurethane base layer as the basic support layer, which can reduce the thickness of the thermoplastic polyurethane surface layer, thereby reducing the amount of thermoplastic polyurethane used and reducing the shrinkage rate of the floor. The thermoplastic polyurethane base layer adopts foamed thermoplastic polyurethane, which can greatly improve the elasticity and resilience of the floor, reduce the amount of thermoplastic polyurethane used, and separate the foamed thermoplastic polyurethane into a foam array through a skeleton. When the foam array is compressed, it can produce a large deformation. When deformed, the elasticity and resilience of the floor are met. At the same time, during the deformation process, the periphery of the foam array is limited by the grid holes of the glass fiber grid, and the top and bottom surfaces of the foam array are limited by the glass fiber mesh, which can limit the deformation of the foam array; that is, when the foam array is compressed and deformed to a set amount, The glass fiber grid and the glass fiber mesh form a hard support, which can protect the foam array and control the deformation of the floor at the same time. The skeleton controls the shrinkage rate of the basic support layer. In addition, the glass fiber mesh can disperse the force of a certain area to the surrounding foam array, so that the surrounding area of ​​the floor can deform synchronously, thereby extending the service life of the foam array. The thermoplastic polyurethane base layer and the thermoplastic polyurethane surface layer are integrated by the glass fiber convex nails, and the thermoplastic polyurethane sealing layer is three-dimensionally restrained by the glass fiber convex nails and the glass fiber mesh. It can prevent the layers of the thermoplastic polyurethane base layer from peeling off and reduce the shrinkage rate of the floor. In addition, by adding a small amount of ordinary thermoplastic polyurethane particles to the thermoplastic polyurethane foam particles, the deformation of the foam array can be controlled, and at the same time, the adhesion between the thermoplastic polyurethane foam array and the thermoplastic polyurethane sealing layer is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic diagram of the overall structure of the thermoplastic polyurethane floor of the present invention.

[0022] Figure 2 For the present invention Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0023] Figure 3 It is a schematic diagram of the installation structure of the glass fiber grid, glass fiber mesh and polyurethane foam array of the present invention.

[0024] Figure 4 It is a schematic diagram of the structure of two sets of framework bodies before installation of the present invention.

[0025] Figure 5 It is a schematic diagram of the structure of two sets of elastic base layers being coated with glue by a coating roller according to the present invention.

[0026] Figure 6 It is a schematic diagram of the state where two groups of elastic base layers of the present invention are heated by hot-melt rollers.

[0027] Figure 7 It is a schematic diagram of the state in which the polyurethane foam array of the present invention is pressed onto a frame body by a groove roller.

[0028] Figure 8 It is a schematic structural diagram of the elastic base processing system of the present invention.

[0029] Figure numerals: 1. thermoplastic polyurethane base layer, 2. thermoplastic polyurethane surface layer, 3. elastic base layer, 4. glass fiber grid, 5. glass fiber mesh, 6. glass fiber convex nails, 7. thermoplastic polyurethane sealing layer, 8. polyurethane foam array, 9. glass fiber warp sheet, 10. glass fiber weft sheet, 11. glue coating roller, 12. hot melt roller, 13. forming roller pair, 14. die head, 15. groove roller, 16. flat roller. DETAILED DESCRIPTION

[0030] Example:

[0031] like Figures 1 to 8 The thermoplastic polyurethane floor shown in the figure comprises a thermoplastic polyurethane base layer 1, wherein at least one side of the thermoplastic polyurethane base layer 1 is provided with a thermoplastic polyurethane surface layer 2; the thickness of the thermoplastic polyurethane surface layer 2 is 1 / 10 to 1 / 5 of the thickness of the thermoplastic polyurethane base layer 1, preferably 1 / 7; the thermoplastic polyurethane base layer 1 provides the elasticity and resilience requirements of the floor, thereby reducing the thickness of the thermoplastic polyurethane surface layer 2, thereby reducing the shrinkage rate of the floor; the thermoplastic polyurethane base layer 1 comprises two groups of elastic base layers 3, and the elastic base layers 3 comprise:

[0032] A frame body, the frame body comprising a glass fiber grid 4, one side of the glass fiber grid 4 is thermally bonded with a glass fiber mesh 5, and the side of the glass fiber mesh 5 away from the glass fiber grid 4 is integrally formed with a glass fiber convex nail 6, and the glass fiber convex nail 6 is a T-shaped structure;

[0033] Thermoplastic polyurethane sealing layer 7, the glass fiber convex nail 6 is arranged on the inner side of the thermoplastic polyurethane sealing layer 7, and the glass fiber mesh 5 is thermally bonded to the surface of the thermoplastic polyurethane sealing layer 7;

[0034] A polyurethane foam array 8 is filled inside the glass fiber grid 4 and flows between the glass fiber mesh 5 and the glass fiber grid 4. The polyurethane foam array 8 is bonded to the glass fiber mesh 5. At the same time, the polyurethane foam array 8 is heat-pressed and bonded to the thermoplastic polyurethane sealing layer 7 through the mesh holes of the glass fiber mesh 5. The glass fiber grid 4 can separate the foamed thermoplastic polyurethane into a foam array. When the foam array is compressed, it can produce a large deformation. During the deformation process, the grid holes of the glass fiber grid 4 and the glass fiber mesh 5 can limit the foam array, which can limit the deformation of the foam array, and the skeleton controls the shrinkage rate of the thermoplastic polyurethane base layer 1. In addition, the glass fiber mesh 5 can disperse the force of a certain area to the surrounding foam array, thereby increasing the service life of the foam array. The glass fiber convex nails 6 and the glass fiber mesh 5 can perform three-dimensional restraint on the thermoplastic polyurethane sealing layer 7. It can prevent the layers of the thermoplastic polyurethane base layer 1 from peeling off and reduce the shrinkage rate of the floor.

[0035] The glass fiber grids 4 of the two groups of the elastic base layers 3 are bonded together by adhesive; the thermoplastic polyurethane surface layer 2 and the thermoplastic polyurethane base layer 1 are bonded together by an interface agent.

[0036] The glass fiber grid 4 includes a row of glass fiber warp sheets 9 and a row of glass fiber weft sheets 10 which are thermally bonded.

[0037] The thermoplastic polyurethane foam array 8 is composed of thermoplastic polyurethane foam materials mixed, kneaded and extruded; the thermoplastic polyurethane foam array is composed of thermoplastic polyurethane foam materials mixed, kneaded and extruded; the content ratio of thermoplastic polyurethane ordinary particles (TPU-FS) and thermoplastic polyurethane foam particles (ETPU) in the thermoplastic polyurethane foam material is 1:5~7.

[0038] The thickness of the glass fiber grid 4 is 5 to 10 times the thickness of the glass fiber mesh 5; the aperture of the glass fiber mesh 5 is 0.1 to 0.5 cm; the spacing between adjacent glass fiber warp sheets 9 is 2 to 5 cm; the spacing between adjacent glass fiber weft sheets 10 is 2 to 5 cm.

[0039] A thermoplastic polyurethane floor production process is used to produce thermoplastic polyurethane floor, and the production process is specifically as follows:

[0040] S1: skeleton processing, unwinding the glass fiber grid 4 onto the processing platform, then rolling the adhesive on the top surface of the glass fiber grid 4, then unwinding the glass fiber mesh 5, and hot pressing the glass fiber grid 4 and the glass fiber mesh 5 together by hot pressing rollers to complete the skeleton processing; the glass fiber mesh 5 and the glass fiber grid 4 are hot pressed together to form a whole, thereby obtaining the internal support skeleton of the elastic base layer 3;

[0041] S2: Processing of the elastic base layer 3. First, ordinary thermoplastic polyurethane particles are fed into an extrusion molding machine to obtain a thermoplastic polyurethane sealing layer 7. The raw materials of the polyurethane foam array 8 are fed into another extrusion molding machine to obtain a polyurethane foam array 8. Next, the thermoplastic polyurethane sealing layer 7 is pressed against the outer surface of the glass fiber mesh 5, so that the glass fiber mesh 5 is embedded in the outer surface of the thermoplastic polyurethane sealing layer 7. Next, the polyurethane foam array 8 is pressed against the skeleton. Finally, the elastic base layer 3 is obtained after hot pressing and forming by hot pressing and shaping rollers. The elastic base layer 3 is rolled to obtain a coil of the elastic base layer 3.

[0042] S3: Processing the thermoplastic polyurethane base layer 1, unwinding the elastic base layer 3 coil, then rolling the glue onto the glass fiber grid 4 through the glue coating roller 11, and hot-melt bonding the polyurethane foam array 8 into one body through the hot melt roller 12, specifically: controlling the temperature of the hot melt roller 12 at 130°C, the bubble particles on the surface of the polyurethane foam array 8 burst, so that the particles of the two groups of elastic base layers 3 are adhered together, thereby forming a buffer membrane between the two groups of polyurethane foam arrays 8; then, pressing the two groups of elastic base layers 3 together through a cold pressing roller, so that the glue on the glass fiber grid 4 is bonded to each other, and trimming is performed to obtain the thermoplastic polyurethane base layer 1;

[0043] S4: processing the thermoplastic polyurethane surface layer 2, feeding the ordinary thermoplastic polyurethane particles into an extrusion molding machine to obtain the thermoplastic polyurethane surface layer 2;

[0044] S5: The floor cloth is formed by coating the interface agent on one or both sides of the thermoplastic polyurethane base layer with a rubber roller, and then the thermoplastic polyurethane surface layer 2 and the thermoplastic polyurethane base layer 1 are pressed together by hot-pressing rollers or cold-pressing rollers.

[0045] The lamination process of the thermoplastic polyurethane sealing layer 7 and the outer surface of the glass fiber mesh 5 is as follows: the frame body is fed into the molding pair of rollers 13, wherein the gap between the molding pair of rollers 13 is the sum of the thickness of the glass fiber mesh 5 and the length of the glass fiber convex nail 6. Then, after the die head 14 of the extrusion molding machine discharges the material, the rubber material is fed into the top surface of the frame body, and the rubber material is used to cover the entire glass fiber convex nail 6 and the outer surface of the glass fiber mesh 5. The rubber material is pressed by the molding pair of rollers 13 so that the rubber material enters the inner surface of the glass fiber mesh 5, and the thermoplastic polyurethane sealing layer 7 and the glass fiber mesh are completed. During processing, the frame body is first fed into the forming roller pair 13, then, the thermoplastic polyurethane ordinary particles and the additives are mixed and melted by the extrusion molding machine, and the polyurethane thin layer is extruded through the die head 14, then, the polyurethane thin layer is fed into the forming roller pair 13, and the glass fiber convex nails 6 are pressed into the uncured polyurethane thin layer by the forming roller pair 13, and at the same time, the glass fiber mesh 5 is pressed onto the surface of the polyurethane thin layer, so that the frame body and the thermoplastic polyurethane sealing layer 7 are hot-pressed into one body by the forming roller pair 13.

[0046] The lamination process of the polyurethane foam array 8 and the frame body is as follows: after the die head 14 of the extrusion molding machine discharges the material, the material is first divided by the groove roller 15, and the groove roller 15 is pressed onto the surface of the glass fiber warp sheet 9 or the glass fiber weft sheet 10 of the glass fiber grid 4, and the rubber material of the polyurethane foam array 8 is fed into the grid holes of the glass fiber grid 4, so that the polyurethane foam array 8 protrudes from the surface of the glass fiber grid 4 by 0.2-0.5mm, preferably 0.3mm; then, the polyurethane foam array 8 after the material division and filling is fed to the flat roller 16 for pressing to complete the pre-pressing; during the processing, the ingredients are mixed, melted and extruded by the extrusion molding machine, and a polyurethane foam thin layer is extruded through the die head 14, and then, the polyurethane foam array 8 is pressed. The foam thin layer is fed into the groove roller 15, and the groove roller 15 is pressed onto the surface of the glass fiber warp sheet 9 or the glass fiber weft sheet 10 of the glass fiber grid 4 to prevent the polyurethane foam material from being squeezed onto the surface of the glass fiber grid 4. At the same time, the groove roller 15 separates the polyurethane foam thin layer, and the separated polyurethane foam material enters between the adjacent glass fiber warp sheets 9 or between the adjacent glass fiber weft sheets 10; and through the surface extrusion of the groove roller 15, the polyurethane foam material is fully filled into the grid holes of the glass fiber grid 4 and the glass fiber mesh 5; by controlling the outer diameter of the position of the groove roller 15 facing the grid holes and the outer diameter of the position of the groove roller 15 facing the glass fiber warp sheet 9 or the glass fiber weft sheet 10, the thickness of the polyurethane foam array 8 protruding from the surface of the glass fiber grid 4 can be controlled.

[0047] The existing thermoplastic polyurethane floor uses all-thermoplastic polyurethane ordinary particles as the main material to prepare a 2.48mm TPU floor cloth. The specific ingredients of the thermoplastic polyurethane ordinary particles are: 40kg of thermoplastic polyurethane ordinary particles (TPU-FS), 30kg of 60C halogen-free flame retardant, 28kg of H-AL aluminum hydroxide, 5.5kg of halogen-free aluminum flame retardant, 1kg of PE compatibilizer, 0.9kg of hard grease lubricant, 1.3kg of polypropylene lubricant, 1.3kg of silicone lubricant and 0.15kg of 316A lubricant; a 2.48mm TPU floor cloth is prepared using all-TPU-FS main materials, and the shrinkage rate of the TPU floor cloth is tested. During the test, multiple batches of samples are cut and the TPU floor cloth is tested by a constant temperature heating device (constant temperature 80°C, continuous heating for 6h), and the average lateral change rate is 0.26%, and the average longitudinal change rate is 0.27%; then, according to the thermoplastic The polyurethane floor production process prepares thermoplastic polyurethane floor. During the preparation, the content ratio of TPU-FS and ETPU is 1:6.5, the additive ratio is based on the total amount of TPU-FS and ETPU, and the additive ratio is proportioned according to the existing thermoplastic polyurethane common particle batching method. When the thickness of the prepared TPU floor cloth is 2.14 mm, the elasticity obtained by test is 2.57% greater than that of the existing TPU floor cloth, and the rebound elasticity is 0.21% greater than that of the existing TPU floor cloth, both of which meet the elasticity and rebound elasticity requirements of the TPU floor cloth; and the lateral change rate of the TPU floor cloth obtained by test is 0.17%, and the longitudinal change rate is 0.21%, both of which meet the technical requirement of less than 0.3%; the gram weight of the TPU floor cloth is 3.217g, which meets the technical requirement of less than 3.5g; compared with the floor cloth prepared by all TPU-FS, the floor cloth prepared by the present invention (the content ratio of PU-FS and ETPU is 1:6.5) has a 27% reduction in the amount of TPU raw material.

[0048] The above embodiments are only preferred implementations of the present invention, so any equivalent changes or modifications made according to the structures, features and principles described in the scope of application of the present invention are included in the scope of application of the present invention.

Claims

1. A thermoplastic polyurethane floor, characterized in that: The invention comprises a thermoplastic polyurethane base layer, wherein at least one side of the thermoplastic polyurethane base layer is provided with a thermoplastic polyurethane surface layer; the thickness of the thermoplastic polyurethane surface layer is 1 / 10 to 1 / 5 of the thickness of the thermoplastic polyurethane base layer; the thermoplastic polyurethane base layer comprises two groups of elastic base layers, and the elastic base layers comprise: A frame body, the frame body comprising a glass fiber grid, one side of the glass fiber grid is thermally bonded with a glass fiber mesh, and one side of the glass fiber mesh away from the glass fiber grid is integrally formed with a glass fiber convex nail, and the glass fiber convex nail is a T-shaped structure; Thermoplastic polyurethane sealing layer, the glass fiber convex nails are arranged on the inner side of the thermoplastic polyurethane cushion layer, and the glass fiber mesh is thermally bonded to the surface of the thermoplastic polyurethane sealing layer; A polyurethane foam array is filled inside the glass fiber grid and flows between the glass fiber mesh and the glass fiber grid. The polyurethane foam array is bonded to the glass fiber mesh. Meanwhile, the polyurethane foam array passes through the mesh of the glass fiber mesh and is heat-pressed and bonded to the thermoplastic polyurethane sealing layer. The two groups of glass fiber grids of the elastic base layer are bonded together by adhesive; the thermoplastic polyurethane surface layer and the thermoplastic polyurethane base layer are bonded together by an interface agent.

2. The thermoplastic polyurethane floor according to claim 1, characterized in that: The glass fiber grid comprises a row of glass fiber warp sheets and a row of glass fiber weft sheets which are thermally bonded.

3. The thermoplastic polyurethane floor according to claim 1, characterized in that: The thermoplastic polyurethane foam array is formed by mixing, kneading and extruding thermoplastic polyurethane foam materials; the content ratio of thermoplastic polyurethane ordinary particles to thermoplastic polyurethane foam particles in the thermoplastic polyurethane foam material is 1:5-7.

4. The thermoplastic polyurethane floor according to claim 1, characterized in that: The thickness of the fiberglass grid is 5 to 10 times the thickness of the fiberglass mesh; the aperture of the fiberglass mesh is 0.1 to 0.5 cm; the spacing between adjacent fiberglass warp sheets is 2 to 5 cm; the spacing between adjacent fiberglass weft sheets is 2 to 5 cm.

5. A process for producing a thermoplastic polyurethane floor, used for producing the thermoplastic polyurethane floor according to any one of claims 1 to 4, characterized in that: The production process is specifically as follows: S1: skeleton processing, unwinding the fiberglass grid onto the processing platform, then rolling the adhesive on the top surface of the fiberglass grid, then unwinding the fiberglass mesh, and hot-pressing the fiberglass grid and the fiberglass mesh together through a hot-pressing roller to complete the skeleton processing; S2: elastic base processing, first, ordinary thermoplastic polyurethane particles are fed into an extrusion molding machine to obtain a thermoplastic polyurethane sealing layer, and the raw materials of the polyurethane foam array are fed into another extrusion molding machine to obtain a polyurethane foam array, and then the thermoplastic polyurethane sealing layer is pressed with the outer surface of the glass fiber mesh, so that the glass fiber mesh is embedded in the outer surface of the thermoplastic polyurethane sealing layer; then, the polyurethane foam array is pressed with the skeleton, and finally, the elastic base is obtained after hot pressing and molding by hot pressing and shaping rollers, and the elastic base is rolled to obtain an elastic base coil; S3: thermoplastic polyurethane base processing, unwinding the elastic base coil, then rolling the glue onto the glass fiber grid through a glue coating roller, hot-melt bonding the polyurethane foam array into one through a hot melt roller, and bonding two sets of elastic bases into one through a cold press roller, and trimming to obtain the thermoplastic polyurethane base; S4: thermoplastic polyurethane surface layer processing, sending ordinary thermoplastic polyurethane particles into an extrusion molding machine to obtain a thermoplastic polyurethane surface layer; S5: The floor cloth is formed by coating the interface agent on one or both sides of the thermoplastic polyurethane base layer with a rubber roller, and then the thermoplastic polyurethane surface layer and the thermoplastic polyurethane base layer are pressed together by hot-pressing rollers or cold-pressing rollers.

6. The process for producing thermoplastic polyurethane flooring according to claim 5, characterized in that: The process of laminating the thermoplastic polyurethane sealing layer with the outer surface of the glass fiber mesh is as follows: the frame body is fed into a pair of molding rollers, wherein the gap between the pair of molding rollers is the sum of the thickness of the glass fiber mesh and the length of the glass fiber convex nails; then, after the die head of the extrusion molding machine discharges the material, the rubber is fed into the top surface of the frame body, and the rubber is used to cover the entire glass fiber convex nail and the outer surface of the glass fiber mesh; the rubber is pressed by the molding rollers so that the rubber enters the inner surface of the glass fiber mesh, thereby completing the integral molding of the thermoplastic polyurethane sealing layer and the glass fiber mesh.

7. The process for producing thermoplastic polyurethane flooring according to claim 5, characterized in that: The lamination process of the polyurethane foam array and the frame body is as follows: After the material is discharged from the die head of the extrusion molding machine, it is first divided by a groove roller, which is pressed onto the surface of the glass fiber warp or glass fiber weft of the glass fiber grid, and the rubber of the polyurethane foam array is fed into the grid holes of the glass fiber grid, so that the polyurethane foam array protrudes 0.2~0.5mm from the surface of the glass fiber grid; then, the divided and filled polyurethane foam array is fed to a flat roller for pressing to complete the pre-pressing.

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