Plastic floor made of PVC (polyvinyl chloride) and TPU (thermoplastic polyurethane) mixed material and manufacturing method of plastic floor

Abstract

The invention discloses a PVC (polyvinyl chloride) and TPU (thermoplastic polyurethane) mixed plastic floor and a preparation method thereof, the floor is composed of a plurality of floor units, and each floor unit is composed of a surface UV (ultraviolet) coating, a TPU or PVC transparent wear-resistant layer, a PVC printing decorative layer, a middle material layer and a composite bottom material layer. The materials used by the composite middle material layer and the composite bottom material layer comprise stone powder, PVC powder, TPU elastic particles, a small amount of plasticizer and a small amount of stabilizer, the content of the cheap stone powder accounts for 60% or above, and the cost of production raw materials is greatly reduced; the proportion of the PVC powder in the system is partially replaced by the TPU particles, so that the addition amount of the PVC powder is relatively less, the environment-friendly plasticizer and stabilizer required to be added in the whole system are relatively reduced, and the environment-friendly floor is more environment-friendly compared with the traditional PVC floor; the decorative layer of the floor provided by the invention is a mature and colorful PVC printing color film used on the traditional PVC floor, and the process and material of a new printing film do not need to be additionally developed.

Description

Technical Field

[0001] The present invention relates to the technical field of flooring, and in particular to a plastic flooring made of a mixed material of PVC and TPU and a manufacturing method thereof. Background Art

[0002] The mainstream materials used in the current market for plastic flooring are PVC and rubber. Flooring can be basically divided into two categories: sheet and roll. Sheet flooring is basically semi-rigid ordinary flooring and buckle-type lock flooring. Currently, the sheet flooring field basically uses PVC material. There are now non-PVC material floors in the market, such as PET material, PP material, TPU material, etc., with a thickness of 2.0-6.0mm.

[0003] TPU and PVC materials each have their own advantages and disadvantages. Although PVC material has improved in some properties, it has some reduction in brittleness, hardness and other properties, and has a pungent odor during production and processing. In addition, a variety of processing aids and plasticizers need to be added during the PVC processing process, and the environmental protection function is greatly reduced.

[0004] TPU material not only has high-quality high tension, high tensile force, and strong aging resistance, but also is a mature environmentally friendly material. It does not need to add a variety of processing aids during the production and processing, which is very consistent with the requirements of today's consumers. TPU has a relatively low glass transition temperature, and it still maintains good elasticity and flexibility at minus 35 degrees, and other physical properties will not deteriorate. When the floor is often subjected to mechanical effects such as friction and scraping during use, it will cause its surface to gradually wear out. TPU plastic raw materials have excellent wear resistance, which is 3-10 times more wear-resistant than natural rubber. It is one of the preferred materials for wear-resistant products. The TPU flooring on the market is basically mostly coiled. The structure of the elastic TPU coiled floor is TPU environmentally friendly wear-resistant layer, decorative layer, TPU elastic stabilization layer and TPU foaming buffer layer from top to bottom. Among them, the TPU environmentally friendly wear-resistant layer is the top layer, which plays a wear-resistant role, and the decorative layer and TPU elastic stabilization layer are adjacent. The TPU foaming buffer layer is adjacent to the TPU elastic stabilization layer, which plays a balancing role.

[0005] However, the raw materials for the production of commercially available elastic TPU coil flooring are mainly biomaterials and TPU elastic particles, of which TPU materials account for more than 90% of the total mass, and the cost of raw materials for production and processing is quite expensive. In addition, the production cost of the decorative layer materials that can be applied to the TPU coil is also high, and the types of printed patterns on the decorative layer are also limited, and the cost of pattern development is also high. Summary of the invention

[0006] The object of the present invention is to provide a plastic floor made of a mixed material of PVC and TPU and a manufacturing method thereof, so as to solve the problems raised in the above background technology.

[0007] A plastic floor made of a mixed material of PVC and TPU consists of a plurality of floor units. The floor units consist of a surface UV coating, a TPU or PVC transparent wear-resistant layer, a PVC printed decorative layer, a middle material layer and a bottom material layer.

[0008] Furthermore, the middle material layer is a composite middle material layer, and the bottom material layer is a composite bottom material layer.

[0009] Furthermore, the middle material layer is composed of a composite middle material layer, a glass fiber layer and a composite middle material layer, and the bottom material layer is a composite bottom material layer.

[0010] Furthermore, the middle material layer is composed of a composite middle material layer, a glass fiber layer, a composite middle material layer, a glass fiber layer and a composite middle material layer, and the bottom material layer is a composite bottom material layer or a non-slip soft bottom film layer.

[0011] Furthermore, an adhesive layer and a sound reduction layer are sequentially arranged on the back side of the composite base material layer.

[0012] Furthermore, the composite middle material layer and the composite bottom material layer are both made of a mixed material of PVC and TPU, the composite middle material layer contains chopped glass fibers, and the chopped glass fiber content accounts for 2-25% by weight. The material of the adhesive layer includes one or more of hot melt adhesive, two-component adhesive, and PUR thermosetting adhesive. The material of the sound reduction layer is one or more of chemical fiber cloth, IXPE, EVA, and cork. The thickness of the sound reduction layer is 0.5-3mm, and the glass fiber layer is a mesh glass fiber layer or a composite glass fiber chopped mat, or a glass fiber layer coated with an adhesive film, or a glass fiber layer coated with a paste resin or other composite glass fiber layers that can be bonded to the composite layer, and the gram weight range is 15g-400g.

[0013] A method for making a plastic floor made of a mixed material of PVC and TPU comprises the following steps:

[0014] 1) preparing a composite middle material layer and a composite bottom material layer: mixing PVC resin powder, TPU particles, plasticizer, rare earth composite stabilizer, rosin, toughening agent, color powder, stone powder according to weight parts of 0-60 parts, 6-100 parts, 0-32 parts, 0.1-3 parts, 0-1 parts, 0-3 parts, 0-1 parts, 200-400 parts for 30-3000s, banburying for 40-120s, and then calendering at 100-150° C. to produce a sheet with a thickness of 0.2-3mm, a length of ≥0.5m, and a width of 0.5-2m, adding chopped glass fiber to the composite middle material layer, and the chopped glass fiber content accounts for 2-25% by weight;

[0015] 2) The TPU or PVC transparent wear-resistant layer, the PVC printed decorative layer, the middle material layer and the composite base material layer or the non-slip soft base layer are formed by flat vulcanization hot pressing, or a multi-layer hot laminating machine is used for laminating, first hot pressing and then water cooling to form a product, the hot pressing temperature is 120-160°C, the hot pressing pressure is 3-10Mpa, the hot pressing time is 1000-3500s, the water cooling pressure is 3-15Mpa, and the water cooling time is 1000-3000s;

[0016] 3) After the surface is treated with UV, a UV coating is obtained, and then the semi-finished product is transported to a hot tempering furnace with a temperature of 100-160°C, where the semi-finished product is continuously heated for 60-420s, and then transported out of the hot furnace. When the semi-finished product is transported out, the surface temperature of the product is 70-120°C, and then it is cooled by natural environment cooling, water treatment cooling or wind treatment cooling to stabilize the thermal shrinkage performance of the product, and the finished floor is prepared through molding processing.

[0017] Furthermore, in the step 1), the plasticizer is dioctyl terephthalate, and the toughening agent is one or more of acrylic copolymer modified resin and chlorinated polyethylene.

[0018] Furthermore, in the step 2), the thickness of the TPU or PVC transparent wear-resistant layer is 0.1-1 mm, the thickness of the PVC printed decorative layer is 0.05-0.2 mm, and the material of the anti-slip soft bottom layer is a soft anti-slip film made of TPU or PVC with an inorganic content of ≤10% and other organic content of ≥90%, and its Shore (A) hardness is between 10 and 40 and the thickness is between 0.2 and 1.0 mm.

[0019] Furthermore, in step 3), after the product is subjected to heat and cold treatment through a tempering process to stabilize its thermal shrinkage performance, the sound reduction layer is bonded to the back side through an adhesive layer, and after the sound reduction layer is firmly bonded to the back side of the semi-finished product, a standard floor product is prepared through molding processing.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The materials used in the composite middle material layer and the composite bottom material layer of the present invention include stone powder, PVC powder, TPU elastic particles, a small amount of plasticizer and stabilizer, among which the content of cheap stone powder accounts for more than 60%, which greatly reduces the cost of production raw materials; because the proportion of PVC powder in the system is partially replaced by TPU particles, the amount of PVC powder added is relatively less, and the environmentally friendly plasticizer and stabilizer required to be added in the entire system will be relatively reduced a lot, which is more environmentally friendly than traditional PVC floors; the decorative layer of the floor of the present invention continues to use the mature and colorful PVC printing color film used on traditional PVC floors, without the need to develop new printing film processes and materials; TPU elastic particles are added to the floor system of the present invention, and the overall flexibility of the floor is greatly improved, which can better adapt to low-temperature use environments than traditional PVC floors. In addition, the present invention applies the wear resistance, scratch resistance, high elasticity and strong weather resistance of TPU elastomers to PVC floors, enhances the wear resistance and scratch resistance of the existing PVC floor surface, gives the floor a better elastic foot feel, and also broadens the floor paving and use temperature range. | BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the product structure of Embodiments 1-3 of the present invention;

[0023] Figure 2 This is a schematic diagram of the product structure of Example 4 of the present invention;

[0024] Figure 3 This is a schematic diagram of the product structure of Example 5 of the present invention;

[0025] Figure 4 This is a schematic diagram of the product structure of Example 6 of the present invention;

[0026] Figure 5 This is a schematic diagram of the product structure of Example 7 of the present invention;

[0027] In the figure: 1-surface UV coating; 2-TPU or PVC transparent wear-resistant layer; 3-PVC printed decorative layer; 4-composite middle material layer; 5-composite base material layer; 6-glass fiber layer; 7-adhesive layer; 8-sound reduction layer; 9-anti-slip soft base layer. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is described in more detail below in conjunction with specific implementations and drawings.

[0029] Example 1

[0030] A plastic floor made of a mixed material of PVC and TPU is composed of a plurality of floor units. The floor units are composed of a surface UV coating 1, a TPU or PVC transparent wear-resistant layer 2, a PVC printed decorative layer 3, a middle material layer and a composite base material layer 5.

[0031] The method for making the plastic floor made of a mixed material of PVC and TPU comprises the following steps:

[0032] 1) preparing a composite middle material layer 4 and a composite bottom material layer 5: mixing PVC resin powder, TPU particles, dioctyl terephthalate, rare earth composite stabilizer, and stone powder in weight proportions of 60 parts, 6 parts, 32 parts, 0.1 parts, and 200 parts for 30 seconds, kneading for 40 seconds, and then rolling out sheets at 100° C., the sheet thickness is 0.2 mm, the sheet length is ≥0.5 m, and the sheet width is 0.5 m. Short chopped glass fibers are added to the composite middle material layer 4, and the short chopped glass fiber content accounts for 2% by weight;

[0033] 2) The TPU or PVC transparent wear-resistant layer 2, the PVC printed decorative layer 3, the middle material layer and the composite base material layer 5 are sequentially formed by flat vulcanization hot pressing, or a multi-layer hot laminating machine is used for laminating operation, wherein the middle material layer is a layer of composite middle material layer 4, which is first hot pressed and then water cooled to be processed into a product, and the hot pressing temperature is 120°C, the hot pressing pressure is 3Mpa, the hot pressing time is 1000s, the water cooling pressure is 3Mpa, and the water cooling time is 1000s; the thickness of the TPU or PVC transparent wear-resistant layer 2 is 0.1mm, the thickness of the PVC printed decorative layer 3 is 0.05mm, and the PVC printed decorative layer 3 is a PVC printed color film with a pattern on one side and a solid color on the other side;

[0034] 3) After the surface is treated with UV, a UV coating 1 is obtained, and then the semi-finished product is transported to a hot tempering furnace at a temperature of 100°C, where the semi-finished product is continuously heated for 60 seconds, and then transported out of the hot furnace. When the semi-finished product is transported out, the surface temperature of the product is 70°C, and then the product is cooled by natural environment cooling, water treatment cooling or wind treatment cooling to stabilize the thermal shrinkage performance of the product, and the finished floor is prepared through molding processing.

[0035] The composite middle material layer 4 and the composite bottom material layer 5 in the finished floor are both made of a mixed material of PVC and TPU, the composite middle material layer 4 contains short-cut glass fibers, and the weight percentage of the short-cut glass fibers is 2%. The thickness of the plastic floor made of a mixed material of PVC and TPU is 2 mm.

[0036] Example 2

[0037] A plastic floor made of a mixed material of PVC and TPU is composed of a plurality of floor units. The floor units are composed of a surface UV coating 1, a TPU or PVC transparent wear-resistant layer 2, a PVC printed decorative layer 3, a middle material layer and a composite base material layer 5.

[0038] The method for making the plastic floor made of a mixed material of PVC and TPU comprises the following steps:

[0039] 1) preparing a composite middle material layer 4 and a composite bottom material layer 5: mixing TPU particles, dioctyl terephthalate, rare earth composite stabilizer, rosin, acrylic copolymer modified resin, chlorinated polyethylene, and stone powder in weight proportions of 100, 16, 1.5, 0.5, 0.5, 0.5, and 300 for 1500 seconds, kneading for 80 seconds, and then rolling out sheets at 125° C., the sheet thickness is 1.6 mm, the sheet length is ≥0.5 m, and the sheet width is 1.2 m. Chopped glass fibers are added to the composite middle material layer 4, and the chopped glass fiber content accounts for 18% by weight;

[0040] 2) The TPU or PVC transparent wear-resistant layer 2, the PVC printed decorative layer 3, the middle material layer and the composite base material layer 5 are sequentially formed by flat vulcanization hot pressing, or a multi-layer hot laminating machine is used for laminating operation, wherein the middle material layer is a layer of composite middle material layer 4, which is first hot pressed and then water cooled to be processed into a product, the hot pressing temperature is 140°C, the hot pressing pressure is 7Mpa, the hot pressing time is 2200s, the water cooling pressure is 9Mpa, and the water cooling time is 2000s; the thickness of the TPU or PVC transparent wear-resistant layer 2 is 0.6mm, the thickness of the PVC printed decorative layer 3 is 0.1mm, and the PVC printed decorative layer 3 is a PVC printed color film with a pattern on one side and a solid color on the other side;

[0041] 3) After the surface is UV treated to obtain UV coating 1, it is then transported to a hot tempering furnace with a temperature of 130°C, where the semi-finished product is continuously heated for 240 seconds, and then transported out of the hot furnace. When it is transported out, the surface temperature of the product is 95°C, and then it is cooled by natural environment cooling, water treatment cooling or wind treatment cooling to stabilize the thermal shrinkage performance of the product, and the finished floor is prepared through molding processing.

[0042] The composite middle material layer 4 and the composite bottom material layer 5 in the finished floor are both made of a mixed material of PVC and TPU, the composite middle material layer 4 contains short-cut glass fibers, and the weight of the short-cut glass fibers accounts for 10%. The thickness of the plastic floor made of a mixed material of PVC and TPU is 6 mm.

[0043] Example 3

[0044] A plastic floor made of a mixed material of PVC and TPU is composed of a plurality of floor units. The floor units are composed of a surface UV coating 1, a TPU or PVC transparent wear-resistant layer 2, a PVC printed decorative layer 3, a middle material layer and a composite base material layer 5.

[0045] The method for making the plastic floor made of a mixed material of PVC and TPU comprises the following steps:

[0046] 1) preparing a composite middle material layer 4 and a composite base material layer 5: mixing PVC resin powder, TPU particles, dioctyl terephthalate, rare earth composite stabilizer, rosin, color powder, and stone powder according to 30 parts, 55 parts, 15 parts, 3 parts, 1 part, 1 part, and 400 parts by weight for 3000 seconds, kneading for 120 seconds, and then rolling out sheets at 150° C., the sheet thickness is 3 mm, the sheet length is ≥0.5 m, and the sheet width is 2 m. Chopped glass fibers are added to the composite middle material layer 4, and the chopped glass fiber content accounts for 25% by weight;

[0047] 2) The TPU or PVC transparent wear-resistant layer 2, the PVC printed decorative layer 3, the middle material layer and the composite base material layer 5 are formed by flat vulcanization hot pressing, or a multi-layer hot laminating machine is used for laminating. The middle material layer is a layer of composite middle material layer 4. First hot pressing and then water cooling are processed into a product. The hot pressing temperature is 160°C, the hot pressing pressure is 10Mpa, the hot pressing time is 3500s, the water cooling pressure is 15Mpa, and the water cooling time is 3000s; the thickness of the TPU or PVC transparent wear-resistant layer 5 is 1mm, the thickness of the PVC printed decorative layer 3 is 0.2mm, and the PVC printed decorative layer 3 is a PVC printed color film with a pattern on one side and a solid color on the other side;

[0048] 3) After the surface is UV treated to obtain a UV coating 4, it is then transported to a hot tempering furnace at a temperature of 160°C, where the semi-finished product is continuously heated for 420 seconds, and then transported out of the hot furnace. When the semi-finished product is transported out, the surface temperature of the product is 120°C, and then it is cooled by natural environment cooling, water treatment cooling or wind treatment cooling to stabilize the thermal shrinkage performance of the product, and the finished floor is prepared through molding processing.

[0049] The composite middle material layer 4 and the composite bottom material layer 5 in the finished floor are both made of a mixed material of PVC and TPU, the composite middle material layer 4 contains chopped glass fibers, and the chopped glass fibers account for 25% by weight. The thickness of the plastic floor made of a mixed material of PVC and TPU is 10 mm.

[0050] Example 4

[0051] The composition of a plastic floor made of a mixed material of PVC and TPU and step 1) in the production method are the same as in Example 2, except that step 2) and step 3) in the production method are replaced by:

[0052] 2) The TPU or PVC transparent wear-resistant layer 2, the PVC printed decorative layer 3, the middle material layer and the composite base material layer 5 are sequentially formed by flat vulcanization hot pressing, or a multi-layer hot laminating machine is used for laminating operation, wherein the middle material layer is composed of a composite middle material layer 4, a glass fiber layer 7 and a composite middle material layer 4, and the glass fiber layer is a mesh glass fiber layer or a composite glass fiber chopped strand mat, or a glass fiber layer coated with a film, or a glass fiber layer coated with a paste resin or other composite glass fiber layers that can be bonded to the composite layer, The gram weight range is 15g-400g, and the product is processed into a sheet by hot pressing and then water cooling. The hot pressing temperature is 140°C, the hot pressing pressure is 7Mpa, the hot pressing time is 2200s, the water cooling pressure is 9Mpa, and the water cooling time is 2000s. The thickness of the TPU or PVC transparent wear-resistant layer 2 is 0.6mm, and the thickness of the PVC printed decorative layer 3 is 0.1mm. The PVC printed decorative layer 3 is a PVC printed color film with a pattern on one side and a solid color on the other side.

[0053] 3) After the surface is UV treated to obtain UV coating 1, it is then transported to a hot tempering furnace with a temperature of 130°C, where the semi-finished product is continuously heated for 240 seconds, and then transported out of the hot furnace. When it is transported out, the surface temperature of the product is 95°C, and then it is cooled by natural environment cooling, water treatment cooling or wind treatment cooling to stabilize the thermal shrinkage performance of the product, and the finished floor is prepared through molding processing.

[0054] Example 5

[0055] The composition of a plastic floor made of a mixed material of PVC and TPU and step 1) in the production method are the same as in Example 2, except that step 2) and step 3) in the production method are replaced by:

[0056] 2) The TPU or PVC transparent wear-resistant layer 2, the PVC printed decorative layer 3, the middle material layer and the composite base material layer 5 are sequentially formed by flat vulcanization hot pressing, or a multi-layer hot laminating machine is used for laminating operation, wherein the middle material layer is composed of a composite middle material layer 4, a glass fiber layer 7, a composite middle material layer 4, a glass fiber layer 7 and a composite middle material layer 4, and the glass fiber layer is a mesh glass fiber layer or a composite glass fiber chopped strand mat, or a glass fiber layer coated with a film, or a glass fiber layer coated with a paste resin or other materials that can be bonded to the composite layer The composite glass fiber layer has a gram weight range of 15g-400g, is first hot pressed and then water cooled to form a product, the hot pressing temperature is 140°C, the hot pressing pressure is 7Mpa, the hot pressing time is 2200s, the water cooling pressure is 9Mpa, and the water cooling time is 2000s; the thickness of the TPU or PVC transparent wear-resistant layer 2 is 0.6mm, the thickness of the PVC printed decorative layer 3 is 0.1mm, and the PVC printed decorative layer 3 is a PVC printed color film with a pattern on one side and a solid color on the other side;

[0057] 3) After the surface is UV treated to obtain UV coating 1, it is then transported to a hot tempering furnace with a temperature of 130°C, where the semi-finished product is continuously heated for 240 seconds, and then transported out of the hot furnace. When it is transported out, the surface temperature of the product is 95°C, and then it is cooled by natural environment cooling, water treatment cooling or wind treatment cooling to stabilize the thermal shrinkage performance of the product, and the finished floor is prepared through molding processing.

[0058] Example 6

[0059] The composition of a plastic floor made of a mixed material of PVC and TPU and step 1) in the production method are the same as in Example 2, except that step 2) and step 3) in the production method are replaced by:

[0060] 2) The TPU or PVC transparent wear-resistant layer 2, the PVC printed decorative layer 3, the middle material layer and the composite base material layer 5 are sequentially formed by flat vulcanization hot pressing, or a multi-layer hot laminating machine is used for laminating operation, wherein the middle material layer is composed of a composite middle material layer 4, a glass fiber layer 7, a composite middle material layer 4, a glass fiber layer 7 and a composite middle material layer 4, and the glass fiber layer is a mesh glass fiber layer or a composite glass fiber chopped strand mat, or a glass fiber layer coated with a film, or a glass fiber layer coated with a paste resin or other materials that can be bonded to the composite layer The composite glass fiber layer has a gram weight range of 15g-400g, is first hot pressed and then water cooled to form a product, the hot pressing temperature is 140°C, the hot pressing pressure is 7Mpa, the hot pressing time is 2200s, the water cooling pressure is 9Mpa, and the water cooling time is 2000s; the thickness of the TPU or PVC transparent wear-resistant layer 2 is 0.6mm, the thickness of the PVC printed decorative layer 3 is 0.1mm, and the PVC printed decorative layer 3 is a PVC printed color film with a pattern on one side and a solid color on the other side;

[0061] 3) After the surface is treated with UV, a UV coating 1 is obtained, and then the semi-finished product is transported to a hot tempering furnace at a temperature of 130°C, and the semi-finished product is continuously heated for 240 seconds, and then transported out of the hot furnace. The surface temperature of the product is 95°C when it is transported out, and then cooled by natural environment cooling, water treatment cooling or wind treatment cooling to stabilize the thermal shrinkage performance of the product, and the back side is bonded with the sound reduction layer 8 through the adhesive layer 7, and after the sound reduction layer 8 is firmly bonded to the back side of the semi-finished product, a standard floor product is prepared through molding processing. The material of the adhesive layer includes one or more of hot melt adhesive, two-component adhesive, and PUR thermosetting glue, and the material of the sound reduction layer is one or more of chemical fiber cloth, IXPE, EVA, and cork, and the thickness of the sound reduction layer is 0.5-3mm.

[0062] Example 7

[0063] The composition of a plastic floor made of a mixed material of PVC and TPU and step 1) in the production method are the same as in Example 2, except that step 2) and step 3) in the production method are replaced by:

[0064] 2) The TPU or PVC transparent wear-resistant layer 2, the PVC printed decorative layer 3, the middle material layer and the non-slip soft bottom layer 9 are sequentially formed by flat vulcanization hot pressing, or a multi-layer hot laminating machine is used for laminating operation, wherein the middle material layer is composed of a composite middle material layer 4, a glass fiber layer 7, a composite middle material layer 4, a glass fiber layer 7 and a composite middle material layer 4, wherein the glass fiber layer is a mesh glass fiber layer or a composite glass fiber chopped strand mat, or a glass fiber layer coated with a film, or a glass fiber layer coated with a paste resin or other composite glass fiber layers that can be bonded to the composite layer, and the gram weight range is 15g-400g, and is first hot pressed and then water cooled to be formed into a product, and the hot pressing The temperature is 140°C, the hot pressing pressure is 7Mpa, the hot pressing time is 2200s, the water cooling pressure is 9Mpa, and the water cooling time is 2000s; the thickness of the TPU or PVC transparent wear-resistant layer 2 is 0.6mm, the thickness of the PVC printed decorative layer 3 is 0.1mm, the PVC printed decorative layer 3 is a PVC printed color film with a pattern on one side and a solid color on the other side, the thickness of the anti-slip soft bottom layer 9 is 0.2-1.0mm, and its Shore (A) hardness is 10-40. The anti-slip soft bottom layer 9 is a soft anti-slip film made of TPU or PVC with an inorganic content of ≤10% and other organic content of ≥90%.

[0065] 3) After the surface is UV treated to obtain UV coating 1, it is then transported to a hot tempering furnace with a temperature of 130°C, where the semi-finished product is continuously heated for 240 seconds, and then transported out of the hot furnace. When it is transported out, the surface temperature of the product is 95°C, and then it is cooled by natural environment cooling, water treatment cooling or wind treatment cooling to stabilize the thermal shrinkage performance of the product, and the finished floor is prepared through molding processing.

[0066] The original warpage of the finished floor of the present invention after stabilization is ≤3mm, and the product aging performance: after the product is continuously heated at 80°C for 6 hours, the product shrinkage rate is ≤0.20%, and the product warpage is ≤2mm; and the floor product of the present invention can be back-pasted with a layer of hot-melt pressure-sensitive adhesive on the back sound-reducing layer 8, making the product installation more convenient, and a release paper is pasted on the back of the pressure-sensitive adhesive, and the release paper can be removed during construction for quick arrangement.

[0067] The present invention has the same functions as traditional PVC floors, such as being non-toxic, odorless, environmentally friendly, durable, non-slip, waterproof, sound-absorbing, and rich in color. The various performance indicators of the product are very close to those of existing PVC plastic floors. Compared with the existing TPU plastic floors on the market, the present invention has a lower manufacturing cost, a mature and stable production process, high production efficiency and yield rate, and can be produced in large quantities. The product of the present invention has a high recyclability rate and does not have the problem of difficult recycling. The processing scraps in the production process of this product can be directly recycled and reused, and do not need to be crushed and ground like other non-PVC material floors before they can be recycled in small quantities. The product of the present invention has a stronger fit than the TPU plastic floor layer on the market and is easy to process. The material of the present invention has a wide range of applicability and a wide material supply chain. TPU elastic particles are added to the product formula of the present invention, and the product flexibility, resilience, comfort level, and operating temperature range are greatly improved compared to traditional PVC floors.

Claims

1. A plastic floor made of a mixture of PVC and TPU, characterized in that: The invention is composed of a plurality of floor units, wherein the floor units are composed of a surface UV coating (1), a TPU or PVC transparent wear-resistant layer (2), a PVC printed decorative layer (3), a middle material layer and a bottom material layer.

2. The plastic floor made of a mixture of PVC and TPU according to claim 1, characterized in that: The middle material layer is a composite middle material layer (4), and the bottom material layer is a composite bottom material layer (5).

3. The plastic floor made of a mixture of PVC and TPU according to claim 1, characterized in that: The middle material layer is composed of a composite middle material layer (4), a glass fiber layer (6) and a composite middle material layer (4), and the bottom material layer is a composite bottom material layer (5).

4. The plastic floor made of a mixture of PVC and TPU according to claim 1, characterized in that: The middle material layer is composed of a composite middle material layer (4), a glass fiber layer (6), a composite middle material layer (4), a glass fiber layer (6) and a composite middle material layer (4), and the bottom material layer is a composite bottom material layer (5) or a non-slip soft bottom film layer (9).

5. The plastic floor made of a mixture of PVC and TPU according to claim 4, characterized in that: An adhesive layer (7) and a sound reduction layer (8) are sequentially arranged on the back side of the composite base material layer (5).

6. The plastic floor made of a mixture of PVC and TPU according to claim 5, characterized in that: The composite middle material layer (4) and the composite bottom material layer (5) are both made of a mixed material of PVC and TPU, the composite middle material layer (4) contains chopped glass fibers, and the chopped glass fibers account for 2-25% by weight; the material of the adhesive layer (7) includes one or more of hot melt adhesive, two-component adhesive, and PUR thermosetting adhesive; the material of the sound reduction layer (8) is one or more of chemical fiber cloth, IXPE, EVA, and cork, and the thickness of the sound reduction layer is 0.5-3 mm; the glass fiber layer (6) is a mesh glass fiber layer or a composite glass fiber chopped mat, or a glass fiber layer coated with an adhesive film, or a glass fiber layer coated with a paste resin, or other composite glass fiber layers that can be bonded to the composite layer, and the weight ranges from 15g to 400g.

7. A method for manufacturing a plastic floor made of a mixed material of PVC and TPU as claimed in any one of claims 1 to 6, characterized in that: The steps include: 1) preparing a composite middle material layer (4) and a composite bottom material layer (5): mixing PVC resin powder, TPU particles, plasticizer, rare earth composite stabilizer, rosin, toughening agent, color powder, stone powder according to weight proportions of 0-60 parts, 6-100 parts, 0-32 parts, 0.1-3 parts, 0-1 parts, 0-3 parts, 0-1 parts, and 200-400 parts for 30-3000 seconds, kneading for 40-120 seconds, and then rolling out sheets at 100-150° C., wherein the sheet thickness is 0.2-3 mm, the sheet length is ≥0.5 m, and the sheet width is 0.5-2 m, and short chopped glass fibers are added to the composite middle material layer (4), wherein the short chopped glass fibers have a weight proportion of 2-25%; 2) The TPU or PVC transparent wear-resistant layer (2), the PVC printed decorative layer (3), the middle material layer and the composite base material layer (5) or the non-slip soft base layer (9) are sequentially formed by flat plate vulcanization hot pressing, or a multi-layer hot laminating machine is used for laminating, first hot pressing and then water cooling to form a product, the hot pressing temperature is 120-160° C., the hot pressing pressure is 3-10 MPa, the hot pressing time is 1000-3500 seconds, the water cooling pressure is 3-15 MPa, and the water cooling time is 1000-3000 seconds; 3) After the surface is subjected to UV treatment to obtain a UV coating (1), the semi-finished product is then transported to a hot tempering furnace at a temperature of 100-160° C., where the semi-finished product is continuously heated for 60-420 seconds, and then transported out of the hot furnace. When the semi-finished product is transported out, the surface temperature of the product is 70-120° C., and then cooled by natural environment cooling, water treatment cooling or wind treatment cooling to stabilize the thermal shrinkage performance of the product, and the finished floor is prepared through molding processing.

8. The method for making a plastic floor made of a mixed material of PVC and TPU according to claim 7, characterized in that: In the step 1), the plasticizer is dioctyl terephthalate, and the toughening agent is one or more of acrylic copolymer modified resin and chlorinated polyethylene.

9. The method for making a plastic floor made of a mixed material of PVC and TPU according to claim 7, characterized in that: In the step 2), the thickness of the TPU or PVC transparent wear-resistant layer (2) is 0.1-1 mm, the thickness of the PVC printed decorative layer (3) is 0.05-0.2 mm, and the material of the non-slip soft bottom layer (9) is a soft non-slip film made of TPU or PVC with an inorganic content of ≤10% and other organic content of ≥90%, with a Shore (A) hardness of 10-40 and a thickness of 0.2-1.0 mm.

10. The method for making a plastic floor made of a mixed material of PVC and TPU according to claim 7, characterized in that: In the step 3), after the product is subjected to heat and cold treatment through a tempering process to stabilize its thermal shrinkage performance, the back side thereof is bonded to the sound reduction layer (8) through an adhesive layer (7), and after the sound reduction layer (8) is firmly bonded to the back side of the semi-finished product, a standard floor product is prepared through a molding process.

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