Composite plastic floor and method for manufacturing the same

Abstract

This invention provides a composite plastic flooring and its preparation method, relating to the field of composite flooring technology. The composite plastic flooring comprises a first substrate layer, a cork layer, a second substrate layer, a wear-resistant layer, and a coating layer, stacked sequentially. The thickness of each cork layer is greater than the thickness of the first and second substrate layers, and the density of the cork layer is 0.18–0.3 g / cm³. 3 The first and second substrate layers are independently composed of 20-50 wt% polyvinyl chloride and 50-80 wt% stone powder. The composite plastic flooring provided by this invention has a thick cork layer, resulting in good noise reduction and comfortable walking when used as flooring. The addition of the cork layer also significantly reduces the density of the composite plastic flooring, lowering transportation costs. The wear-resistant layer improves the wear resistance of the composite plastic flooring.

Description

Technical Field

[0001] This invention relates to the field of composite flooring technology, specifically to a composite plastic flooring and its preparation method. Background Technology

[0002] In existing technologies, common floor decoration materials include ceramic tiles, wood flooring, and carpets, most of which are made from natural raw materials. The long-term excessive exploitation of natural resources has had a significant impact on the ecological environment. With the improvement of people's living standards, the demand for floor decoration materials is increasing. The challenge lies in how to effectively develop and comprehensively utilize natural resources, comply with the basic principles of energy conservation and environmental protection, and ensure that floor decoration materials are aesthetically pleasing, economical, practical, meet diverse user needs, and provide a certain level of comfort. Therefore, the use of composite and synthetic methods to produce floor decoration materials is an inevitable trend.

[0003] For example, Chinese patent CN201687165A discloses a PVC cork composite flooring, including a base layer, a PVC layer, and a cork layer. The PVC layer is hot-pressed onto the base layer, and the cork layer is laid on the bottom surface of the base layer and bonded to the base layer. Different patterns are printed on the PVC surface layer, and a wear-resistant layer is covered on the patterns. The base layer is formed by mixing stone powder and resin. The solid wood decorative flooring with cork substrate has the characteristics of flame retardancy, corrosion resistance, good elasticity, and good sound absorption, but its noise reduction effect is not good enough. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a composite plastic floor and its preparation method, wherein the composite plastic floor provided by this invention has excellent noise reduction effect.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] This invention provides a composite plastic flooring, comprising a first substrate layer, a cork layer, a second substrate layer, a wear-resistant layer, and a coating layer stacked sequentially.

[0007] The thickness of the cork layer is greater than the thickness of the first substrate layer, and the thickness of the cork layer is greater than the thickness of the second substrate layer; the density of the cork layer is 0.18–0.3 g / cm³. 3 ;

[0008] The first and second substrate layers are independently composed of 20-50 wt% polyvinyl chloride and 50-80 wt% stone powder.

[0009] Preferably, the thickness of the cork layer, the first substrate layer, and the second substrate layer is independently 0.5 to 5 mm.

[0010] Preferably, the wear-resistant layer is made of 65-90 wt% polyvinyl chloride, 9-34 wt% plasticizer, and 0.3-1 wt% stabilizer;

[0011] The thickness of the wear-resistant layer is 0.06 to 1.0 mm.

[0012] Preferably, the coating material is polyurethane resin; the areal density of the coating is 5-50 g / m³. 2 .

[0013] Preferably, a patterned layer is further provided between the second substrate layer and the wear-resistant layer;

[0014] The patterned layer includes a polyvinyl chloride layer and a pattern located on the surface of the polyvinyl chloride layer; the thickness of the patterned layer is 0.05 to 0.07 mm.

[0015] This invention provides a method for preparing the composite plastic flooring described in the above technical solution, comprising the following steps:

[0016] (1) A wear-resistant layer is laid on the surface of the second substrate and hot-pressed to obtain the fabric layer;

[0017] (2) A cork layer and a first substrate layer are sequentially bonded to the second substrate surface of the fabric layer, and paint is applied to the wear-resistant layer surface of the fabric layer and then cured to obtain a composite plastic floor.

[0018] This invention provides a method for preparing the composite plastic flooring described in the above technical solution, characterized by comprising the following steps:

[0019] (1) A wear-resistant layer is laid on the surface of the second substrate and hot-pressed to obtain the fabric layer;

[0020] (2) Bond the first substrate layer and the cork layer to obtain the substrate-cork layer;

[0021] (3) The second substrate layer of the fabric layer is bonded to the cork layer of the substrate-cork layer, and paint is applied to the wear-resistant layer surface of the fabric layer and then cured to obtain composite plastic flooring;

[0022] Steps (1) and (2) are not in any particular order.

[0023] Preferably, when the composite plastic flooring further includes a patterned layer, the step of laying a wear-resistant layer on the surface of the second substrate is replaced by laying a patterned layer and a wear-resistant layer sequentially on the surface of the second substrate.

[0024] Preferably, the preparation method of the first substrate layer includes the following steps: mixing polyvinyl chloride and stone powder, mixing them in an intensive kneading process, and then calendering them to obtain the substrate layer;

[0025] The preparation method of the second substrate layer is the same as that of the first substrate layer.

[0026] Preferably, the method for preparing the wear-resistant layer includes the following steps: mixing polyvinyl chloride, plasticizer and stabilizer, mixing and then calendering to obtain the wear-resistant layer.

[0027] This invention provides a composite plastic flooring, comprising a first substrate layer, a cork layer, a second substrate layer, a wear-resistant layer, and a coating layer stacked sequentially. The thickness of the cork layer is greater than the thickness of the first substrate layer, and the thickness of the second substrate layer is also greater than the thickness of the first substrate layer. The density of the cork layer is 0.18–0.3 g / cm³. The first and second substrate layers are independently composed of 20–50 wt% polyvinyl chloride and 50–80 wt% stone powder. In the composite plastic flooring provided by this invention, the thickness of the cork layer is greater than the thickness of a single substrate layer (the first substrate layer and the second substrate layer). The greater cork layer thickness results in better noise reduction, lower noise levels, and greater walking comfort when the composite plastic flooring is used as flooring. The addition of the cork layer also significantly reduces the density of the composite plastic flooring, lowering transportation costs. The wear-resistant layer improves the wear resistance of the composite plastic flooring. The coating protects the composite plastic flooring from scratches and improves its gloss and aesthetics.

[0028] This invention provides a method for preparing the composite plastic flooring described in the above technical solution. The preparation method provided by this invention has a simple production process, is easy to operate, has low production cost, and is suitable for industrial production. Detailed Implementation

[0029] The present invention provides a composite plastic flooring, comprising a first substrate layer, a cork layer, a second substrate layer, a wear-resistant layer, and a coating layer stacked sequentially; the thickness of the cork layer is greater than the thickness of the first substrate layer, and the thickness of the cork layer is greater than the thickness of the second substrate layer.

[0030] The composite plastic flooring provided by this invention includes a first substrate layer; the material of the first substrate layer includes: 20-50 wt% polyvinyl chloride (PVC), preferably 25-45 wt%, more preferably 30-40 wt%; the PVC preferably includes PVC resin powder SG-5 and / or PVC resin powder SG-8; and 50-80 wt% stone powder, preferably 55-75 wt%, more preferably 60-70 wt%. In this invention, the stone powder is preferably calcium powder, and the particle size of the stone powder is preferably 100-600 mesh, more preferably 150-500 mesh, and even more preferably 150-400 mesh. In this invention, the thickness of the first substrate layer is preferably 0.5-5 mm, specifically preferably 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, or 5 mm.

[0031] The composite plastic flooring provided by this invention includes a cork layer located on the surface of the first substrate layer. In this invention, the density of the cork is 0.18–0.3 g / cm³. 3 More preferably, it is 0.2–0.24 g / cm³. 3 In this invention, the thickness of the cork layer is preferably 0.5 to 5 mm, and more specifically 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm.

[0032] The composite plastic flooring provided by this invention includes a second substrate layer located on the surface of the cork layer; the material of the second substrate layer includes: 20-50 wt% polyvinyl chloride, preferably 25-45 wt%, more preferably 30-40 wt%; the polyvinyl chloride preferably includes PVC resin powder SG-5 and / or PVC resin powder SG-8; stone powder 50-80 wt%, preferably 55-75 wt%, more preferably 60-70 wt%. In this invention, the stone powder is preferably calcium powder, and the particle size of the stone powder is preferably 100-600 mesh, more preferably 150-500 mesh, and even more preferably 150-400 mesh. In this invention, the thickness of the second substrate layer is preferably 0.5-5 mm, specifically preferably 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, or 5 mm.

[0033] The composite plastic flooring provided by this invention preferably further includes a patterned layer located on the surface of the second substrate layer. The patterned layer preferably includes a polyvinyl chloride (PVC) layer and a pattern located on the surface of the PVC layer. This invention does not have a specific limitation on the pattern; any pattern well-known to those skilled in the art can be used. The presence of the patterned layer makes the composite plastic flooring more aesthetically pleasing. In this invention, the thickness of the patterned layer is preferably 0.05–0.07 mm, more preferably 0.055–0.065 mm, and even more preferably 0.06 mm.

[0034] The composite plastic flooring provided by this invention includes a wear-resistant layer located on the surface of the patterned layer; the material of the wear-resistant layer preferably includes: 65-90 wt% polyvinyl chloride, more preferably 69.08-69.61 wt%, and even more preferably 69.4 wt%; 9-34 wt% plasticizer, more preferably 29.8-30.2 wt%, and even more preferably 30 wt%; and 0.3-1 wt% stabilizer, more preferably 0.59-0.61 wt%, and even more preferably 0.6 wt%. In this invention, the plasticizer preferably includes dioctyl terephthalate (DOTP); and the stabilizer preferably includes a calcium-zinc stabilizer. In this invention, the thickness of the wear-resistant layer is preferably 0.06-1 mm, more preferably 0.2-0.8 mm, and even more preferably 0.5-0.7 mm.

[0035] The composite plastic flooring provided by this invention includes a coating on the surface of the wear-resistant layer, wherein the coating material is preferably polyurethane resin (PU resin); the paint content of the coating is preferably 5-50 g / m². 2 More preferably 10–40 g / m 2 More preferably, it is 10–30 g / m 2 .

[0036] This invention provides a method for preparing the composite plastic flooring described in the above technical solution, comprising the following steps:

[0037] (1) A wear-resistant layer is laid on the surface of the second substrate and hot-pressed to obtain the fabric layer;

[0038] (2) A cork layer and a first substrate layer are sequentially bonded to the second substrate surface of the fabric layer, and paint is applied to the wear-resistant layer surface of the fabric layer and then cured to obtain a composite plastic floor.

[0039] Unless otherwise specified, all raw materials used in this invention are commercially available products.

[0040] In this invention, the preparation method of the substrate layer preferably includes the following steps: mixing polyvinyl chloride and stone powder, performing intensive mixing (referred to as the first intensive mixing), and then calendering (referred to as the first calendering) to obtain the substrate layer; the substrate layer is either the first substrate layer or the second substrate layer (i.e., the preparation methods of the first substrate layer and the second substrate layer are the same). In this invention, the intensive mixing temperature is preferably 165-175°C, more preferably 168-172°C, and even more preferably 170°C; the intensive mixing time is preferably 7-9 min, more preferably 7.5-8.5 min, and even more preferably 8 min. In this invention, the calendering temperature is preferably 168-172°C, more preferably 169-171°C, and even more preferably 170°C; the calendering speed is preferably 19.5-20.5 m / min, more preferably 19.8-20.2 m / min, and even more preferably 20 m / min. After the first calendering, this invention preferably further includes winding the obtained substrate layer.

[0041] In this invention, the preferred method for preparing the wear-resistant layer includes the following steps: mixing polyvinyl chloride, plasticizer, and stabilizer, performing intensive mixing (referred to as the second intensive mixing), and then calendering (referred to as the second calendering) to obtain the wear-resistant layer. In this invention, the conditions for the second intensive mixing and the second calendering are preferably the same as the conditions for the first intensive mixing and the first calendering, and will not be described in detail here.

[0042] In this invention, a wear-resistant layer is laid on the surface of a second substrate, and then hot-pressed (referred to as the first hot-press) to obtain a fabric layer. In this invention, when the composite plastic flooring also includes a patterned layer, the laying of a wear-resistant layer on the surface of the second substrate is replaced by laying a patterned layer and a wear-resistant layer sequentially on the surface of the second substrate. In this invention, the temperature of the first hot pressing is preferably 138-142°C, more preferably 139-141°C, and even more preferably 140°C; the first hot pressing preferably includes sequentially performing a first stage hot pressing, a second stage hot pressing, and a third stage hot pressing; the pressure of the first stage hot pressing is preferably 4.9-5.1 MPa, more preferably 5 MPa, and the time of the first stage hot pressing is preferably 4.5-5.5 min, more preferably 5 min; the pressure of the second stage hot pressing is preferably 5.9-6.1 MPa, more preferably 6 MPa, and the time of the second stage hot pressing is preferably 14.5-15.5 min, more preferably 15 min; the pressure of the third stage hot pressing is preferably 7.9-8.1 MPa, more preferably 8 MPa, and the time of the third stage hot pressing is preferably 19.5-20.5 min, more preferably 20 min.

[0043] After obtaining the fabric layer, the present invention sequentially bonds (referred to as the first bonding) a cork layer and a first substrate layer onto the second substrate surface of the fabric layer, and then coats (referred to as the first coating) a paint onto the wear-resistant layer surface of the fabric layer and cures (referred to as the first curing) to obtain a composite plastic floor; the sequential bonding and coating have no temporal order. In the present invention, the adhesive used for the first bonding preferably includes PUR hot melt adhesive or two-component AB adhesive, and the amount of adhesive applied for the first bonding is preferably 30-80 g / m². 2 More preferably 40–70 g / m 2 More preferably 50-60 g / m 2 In this invention, the first coating is preferably roller coating. This invention does not have any particular limitations on the roller coating method, but it can achieve an areal density of 5–50 g / m³. 2 The coating is sufficient. In this invention, the first curing temperature is preferably room temperature, and the first curing is preferably ultraviolet curing. This invention does not have a special limitation on the first curing time, as long as a dry coating can be formed.

[0044] This invention provides a method for preparing the composite plastic flooring described in the above technical solution, comprising the following steps:

[0045] (1) A wear-resistant layer is laid on the surface of the second substrate and hot-pressed (referred to as the second hot pressing) to obtain the fabric layer;

[0046] (2) Bond the first substrate layer and the cork layer together (referred to as the second bonding) to obtain the substrate-cork layer;

[0047] (3) The second substrate layer of the fabric layer is bonded to the cork layer of the substrate-cork layer (referred to as the third bonding), and the wear-resistant layer surface of the fabric layer is coated with paint (referred to as the second coating) and then cured (referred to as the second curing) to obtain composite plastic flooring;

[0048] Steps (1) and (2) are not in any particular order.

[0049] In this invention, the conditions for the second hot pressing are preferably the same as those for the first hot pressing, the conditions for the second bonding and the third bonding are preferably the same as those for the first bonding, the method for the second coating is preferably the same as that for the first coating, and the conditions for the second curing are the same as those for the first curing, which will not be described in detail here.

[0050] The technical solutions of this invention will be clearly and completely described below with reference to the embodiments thereof. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0051] In the following examples and comparative examples, the polyvinyl chloride (PVC) resin powder was SG-8; the calcium powder particle size was 150–400 mesh; and the cork density was 0.2–0.4 g / cm³. 3 Plasticizer DOTP and calcium-zinc stabilizer were purchased from Hunan Jiaquan New Material Technology Co., Ltd.; PU resin was purchased from Hunan Yangguang New Material Co., Ltd.

[0052] Example 1

[0053] The material of the first substrate layer is: 30 wt% polyvinyl chloride (PVC) and 70 wt% calcium powder; the thickness of the first substrate layer is 1 mm. The preparation method of the first substrate layer is as follows: PVC and calcium powder are mixed evenly, kneaded at 170°C for 8 min, and calendered at 50 m / min at 170°C to obtain the first substrate layer.

[0054] Cork layer: 0.2–0.4 g / cm³ 3 Thickness 2mm.

[0055] The material of the second substrate layer is: 30 wt% polyvinyl chloride (PVC) and 70 wt% calcium powder; the thickness of the second substrate layer is 1 mm. The preparation method of the second substrate layer is as follows: the PVC and calcium powder are mixed evenly, kneaded at 170°C for 8 min, and calendered at 50 m / min at 170°C to obtain the second substrate layer.

[0056] Pattern layer: PVC layer and pattern on the surface of the PVC layer, the pattern layer thickness is 0.07mm.

[0057] Wear-resistant layer material: 69.4 wt% polyvinyl chloride, 30 wt% DOTP, and 0.6 wt% calcium-zinc stabilizer. The thickness of the wear-resistant layer is 0.5 mm. Preparation method of the wear-resistant layer: Polyvinyl chloride, DOTP, and calcium-zinc stabilizer are mixed evenly, kneaded at 170°C for 8 min, and calendered at 170°C at a speed of 50 m / min to obtain the wear-resistant layer.

[0058] Coating: Paint content is 15g / m² 2 .

[0059] The preparation method of composite plastic flooring is as follows:

[0060] A patterned layer and a wear-resistant layer are sequentially laid on the surface of the second substrate. The substrate is then hot-pressed at 140℃ and 5MPa for 5 minutes, at 140℃ and 6MPa for 15 minutes, and at 140℃ and 8MPa for 20 minutes to obtain the fabric layer.

[0061] A cork layer and a first substrate layer are sequentially bonded to the surface of the second substrate of the fabric layer. PU resin is then rolled onto the wear-resistant layer of the fabric layer and cured under UV light at room temperature to obtain the composite plastic flooring. The adhesive used is a two-component AB glue, with an application rate of 80 g / m². 2 The density of composite plastic flooring is 1.28 g / cm³. 3 The shrinkage rate was tested twice, and was 0.05% and 0.01% respectively; the noise level measured by the tapping method was 52-55 decibels.

[0062] Example 2

[0063] The material of the first substrate layer is: 25 wt% polyvinyl chloride (PVC) and 75 wt% calcium powder; the thickness of the first substrate layer is 0.7 mm. The preparation method of the first substrate layer is as follows: PVC and calcium powder are mixed evenly, kneaded at 170°C for 8 min, and calendered at 50 m / min at 170°C to obtain the first substrate layer.

[0064] Cork layer: 0.2–0.4 g / cm³ 3 Thickness 1.5mm.

[0065] The material of the second substrate layer is: 25 wt% polyvinyl chloride (PVC) and 75 wt% calcium powder; the thickness of the second substrate layer is 0.8 mm. The preparation method of the second substrate layer is as follows: PVC and calcium powder are mixed evenly, kneaded at 170°C for 8 min, and calendered at 50 m / min at 170°C to obtain the second substrate layer.

[0066] Pattern layer: PVC layer and pattern on the surface of the PVC layer, the pattern layer thickness is 0.07mm.

[0067] Wear-resistant layer material: 72 wt% polyvinyl chloride, 27.6 wt% DOTP, and 0.4 wt% calcium-zinc stabilizer. The thickness of the wear-resistant layer is 0.3 mm. Preparation method of the wear-resistant layer: Polyvinyl chloride, DOTP, and calcium-zinc stabilizer are mixed evenly, kneaded at 170°C for 8 min, and calendered at 170°C at a speed of 50 m / min to obtain the wear-resistant layer.

[0068] Coating: Paint content is 12g / m² 2 .

[0069] The preparation method of composite plastic flooring is as follows:

[0070] A patterned layer and a wear-resistant layer are sequentially laid on the surface of the second substrate. The substrate is then hot-pressed at 140℃ and 5MPa for 5 minutes, at 140℃ and 6MPa for 15 minutes, and at 140℃ and 8MPa for 20 minutes to obtain the fabric layer.

[0071] A cork layer and a first substrate layer are sequentially bonded to the surface of the second substrate of the fabric layer. PU resin is then rolled onto the wear-resistant layer of the fabric layer and cured under UV light at room temperature to obtain the composite plastic flooring. The adhesive used is PUR hot melt adhesive, with an application rate of 50 g / m². 2 The density of composite plastic flooring is 1.3 g / cm³. 3 The shrinkage rate was tested twice, and both times it was 0.09%.

[0072] Example 3

[0073] The material of the first substrate layer is: 50 wt% polyvinyl chloride and 50 wt% calcium powder; the thickness of the first substrate layer is 2 mm. The preparation method of the first substrate layer is as follows: the polyvinyl chloride and calcium powder are mixed evenly, kneaded at 170°C for 8 min, and calendered at 50 m / min at 170°C to obtain the first substrate layer.

[0074] Cork layer: 0.2–0.4 g / cm³ 3 Thickness 4mm.

[0075] The material of the second substrate layer is: 50 wt% polyvinyl chloride and 50 wt% calcium powder; the thickness of the second substrate layer is 2 mm. The preparation method of the second substrate layer is as follows: the polyvinyl chloride and calcium powder are mixed evenly, kneaded at 170°C for 8 min, and calendered at 50 m / min at 170°C to obtain the second substrate layer.

[0076] Pattern layer: PVC layer and pattern on the surface of the PVC layer, the pattern layer thickness is 0.07mm.

[0077] Wear-resistant layer material: 72 wt% polyvinyl chloride, 27.6 wt% DOTP, and 0.4 wt% calcium-zinc stabilizer. The thickness of the wear-resistant layer is 0.7 mm. Preparation method of the wear-resistant layer: Polyvinyl chloride, DOTP, and calcium-zinc stabilizer are mixed evenly, kneaded at 170°C for 8 min, and calendered at 170°C at a speed of 50 m / min to obtain the wear-resistant layer.

[0078] Coating: Paint content is 25g / m² 2 .

[0079] The preparation method of composite plastic flooring is as follows:

[0080] A patterned layer and a wear-resistant layer are sequentially laid on the surface of the second substrate. The substrate is then hot-pressed at 140℃ and 5MPa for 5 minutes, at 140℃ and 6MPa for 15 minutes, and at 140℃ and 8MPa for 20 minutes to obtain the fabric layer.

[0081] A cork layer and a first substrate layer are sequentially bonded to the surface of the second substrate of the fabric layer. PU resin is then rolled onto the wear-resistant layer of the fabric layer and cured under UV light at room temperature to obtain the composite plastic flooring. The adhesive used is a two-component AB glue, with an application rate of 80 g / m². 2 The density of composite plastic flooring is 1.29 g / cm³. 3 The shrinkage rate was tested twice, and was 0.09% and -0.01% respectively.

[0082] Comparative Example 1

[0083] The composite plastic flooring was prepared according to the method of Example 1, the only difference from Example 1 being the exchange of positions between the cork layer and the first substrate layer (i.e., the cork layer is located at the bottom). The noise of the composite plastic flooring was measured to be 70-74 decibels by the tapping method.

[0084] Comparative Example 2

[0085] The composite plastic flooring was prepared according to the method of Example 1, the only difference from Example 1 being that it did not contain a cork layer. The noise level of the composite plastic flooring was measured to be 79-83 decibels by tapping.

[0086] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A composite plastic flooring, characterized in that, It consists of a first substrate layer, a cork layer, a second substrate layer, a wear-resistant layer, and a coating layer, which are stacked in sequence. The density of the cork layer is 0.18~0.3 g / cm³. 3 The thickness of the cork layer is greater than the thickness of the first substrate layer, and the thickness of the cork layer is greater than the thickness of the second substrate layer. The first and second substrate layers are independently composed of 20-50 wt% polyvinyl chloride and 50-80 wt% stone powder. The wear-resistant layer is made of 65-90 wt% polyvinyl chloride, 9-34 wt% plasticizer, and 0.3-1 wt% stabilizer. The method for preparing the composite plastic floor includes the following steps: (1) laying a wear-resistant layer on the surface of the second substrate and hot-pressing it to obtain a fabric layer; (2) sequentially bonding a cork layer and a first substrate layer on the surface of the second substrate of the fabric layer, coating a coating on the surface of the wear-resistant layer of the fabric layer and then curing it to obtain the composite plastic floor. Alternatively, the method for preparing the composite plastic flooring includes the following steps: (1) laying a wear-resistant layer on the surface of the second substrate and hot-pressing it to obtain a fabric layer; (2) bonding the first substrate layer and the cork layer to obtain a substrate-cork layer; (3) bonding the second substrate layer of the fabric layer to the cork layer of the substrate-cork layer, coating the wear-resistant layer surface of the fabric layer and curing it to obtain the composite plastic flooring; steps (1) and (2) have no temporal order.

2. A composite plastic flooring, characterized in that, It consists of a first substrate layer, a cork layer, a second substrate layer, a pattern layer, a wear-resistant layer, and a coating layer, which are stacked in sequence. The density of the cork layer is 0.18~0.3 g / cm³. 3 The thickness of the cork layer is greater than the thickness of the first substrate layer, and the thickness of the cork layer is greater than the thickness of the second substrate layer. The first and second substrate layers are independently composed of 20-50 wt% polyvinyl chloride and 50-80 wt% stone powder. The wear-resistant layer is made of 65-90 wt% polyvinyl chloride, 9-34 wt% plasticizer, and 0.3-1 wt% stabilizer. The patterned layer includes a polyvinyl chloride layer and a pattern located on the surface of the polyvinyl chloride layer; the thickness of the patterned layer is 0.05~0.07mm; The method for preparing the composite plastic flooring includes the following steps: (1) laying a patterned layer and a wear-resistant layer sequentially on the surface of the second substrate, and hot-pressing them to obtain a fabric layer; (2) bonding a cork layer and a first substrate layer sequentially on the surface of the second substrate of the fabric layer, coating the wear-resistant layer of the fabric layer with a coating and then curing it to obtain the composite plastic flooring. Alternatively, the method for preparing the composite plastic flooring includes the following steps: (1) laying a patterned layer and a wear-resistant layer sequentially on the surface of the second substrate, and hot-pressing them to obtain a fabric layer; (2) bonding the first substrate layer and the cork layer to obtain a substrate-cork layer; (3) bonding the second substrate layer of the fabric layer to the cork layer of the substrate-cork layer, coating the wear-resistant layer of the fabric layer with a coating and then curing it to obtain the composite plastic flooring; steps (1) and (2) have no temporal order.

3. The composite plastic flooring according to claim 1 or 2, characterized in that, The thickness of the first substrate layer and the second substrate layer is independently 0.5~4.5mm; The thickness of the cork layer is independently 1~5mm.

4. The composite plastic flooring according to claim 1 or 2, characterized in that, The thickness of the wear-resistant layer is 0.06~1.0mm.

5. The composite plastic flooring according to claim 1 or 2, characterized in that, The coating material is polyurethane resin; the coating amount is 5~50g / m³. 2 .

6. The composite plastic flooring according to claim 3, characterized in that, The method for preparing the first substrate layer includes the following steps: Polyvinyl chloride and stone powder are mixed, kneaded, and then calendered to obtain the substrate layer; The preparation method of the second substrate layer is the same as that of the first substrate layer.

7. The composite plastic flooring according to claim 3, characterized in that, The method for preparing the wear-resistant layer includes the following steps: Polyvinyl chloride, plasticizer, and stabilizer are mixed, kneaded, and then calendered to obtain a wear-resistant layer.