A molded chamfered plastic floor and its preparation method

Abstract

The present invention provides a molded chamfered plastic floor and a preparation method thereof, belonging to the technical field of decoration materials. The present invention mixes the raw materials for preparing the plastic floor to obtain a mixed raw material; the mixed raw material is successively subjected to extrusion, laminating-embossing treatment, molded chamfering treatment, ultraviolet light-curing paint coating treatment, slicing and tenoning to obtain a molded chamfered plastic floor. The present invention sets a molded chamfering treatment process between the laminating-embossing treatment process and the ultraviolet light-curing paint coating treatment process, so as to press chamfered embossments on the surface of the workpiece. By using the method provided by the present invention, a chamfering effect with a larger depth can be achieved, and the chamfering shape is easy to control, which can be a regular chamfer or a special-shaped chamfer. Just select the corresponding template for molded chamfering treatment according to actual needs, so that the paving appearance of the product can be richly presented; at the same time, the method provided by the present invention is simple to operate and suitable for large-scale production.

Description

Technical Field

[0001] The present invention relates to the technical field of decoration materials, and particularly relates to a molded chamfered plastic floor and a preparation method thereof. Background Art

[0002] Plastic floors, that is, floors laid with plastic materials, can be classified into several types according to their matrix raw materials, such as polyvinyl chloride (PVC) plastic, polyethylene (PE) plastic, and polypropylene (PP) plastic. Since PVC has good flame retardancy and self-extinguishing properties, and its performance is easy to regulate, PVC plastic floors are currently the most widely used. The traditional process for preparing plastic floors usually includes, in sequence, mixing, extrusion, laminating-embossing treatment, ultraviolet light-curing paint coating, slicing, and grooving. When preparing plastic floors using the above process, usually during the grooving process, a tool is used to cut out an inclined plane with a certain angle and width to achieve the chamfering effect. The size of this chamfer is limited by the thickness of the wear-resistant layer of the plastic floor and cannot achieve the design of irregular chamfers. Summary of the Invention

[0003] The purpose of the present invention is to provide a molded chamfered plastic floor and a preparation method thereof. Using the method provided by the present invention, a chamfering effect with a larger depth can be achieved, and the chamfer shape is easy to regulate, which can be a regular chamfer or a special-shaped chamfer.

[0004] In order to achieve the above invention purpose, the present invention provides the following technical solutions:

[0005] The present invention provides a preparation method of a molded chamfered plastic floor, including the following steps:

[0006] Mix the raw materials for preparing the plastic floor matrix material to obtain a mixed raw material;

[0007] Subject the mixed raw material to extrusion, laminating-embossing treatment, molded chamfering treatment, ultraviolet light-curing paint coating treatment, slicing, and grooving in sequence to obtain a molded chamfered plastic floor.

[0008] Preferably, by mass, the raw materials for preparing the plastic floor matrix material include 100 parts of polyvinyl chloride, 200 - 400 parts of calcium carbonate, 5 - 10 parts of stabilizer, 0.6 - 6 parts of lubricant, and 5 - 20 parts of processing aid.

[0009] Preferably, the mixing is carried out under high stirring rate and low stirring rate conditions in sequence; the high stirring rate is 550 - 650 r / min, and the low stirring rate is 250 - 350 r / min.

[0010] Preferably, the conditions for extrusion include: processing temperature is 150 - 210 °C, main machine rotation speed is 18 - 25 r / min, and current is 110 - 160 A.

[0011] Preferably, the laminating-embossing treatment includes: laminating and adhering a color film and a wear-resistant layer in sequence on one side of the base board obtained after the extrusion; the temperature of the laminating is 150-200 °C.

[0012] Preferably, the die-pressing chamfering treatment includes: using a template engraved with a chamfer border to press a chamfered embossed pattern on the surface of the workpiece obtained after the laminating-embossing treatment, so that the workpiece obtained after the laminating-embossing treatment has a chamfer shape.

[0013] Preferably, the pressing includes a first pressing and a second pressing carried out in sequence; the temperature of the first pressing is 120-130 °C, the pressure is 4-6 MPa, and the time is 5-10 s; the temperature of the second pressing is 120-130 °C, the pressure is 10-19 MPa, and the time is 3-8 s.

[0014] Preferably, the UV-curable paint coating treatment includes: coating a UV-curable paint on the surface of the wear-resistant layer in the workpiece obtained after the die-pressing chamfering treatment, and forming a UV-curable paint layer on the surface of the wear-resistant layer after curing by irradiating with a UV lamp.

[0015] Preferably, the UV-curable paint includes a primer and a topcoat, and the UV-curable paint coating treatment specifically includes: coating the primer and the topcoat on the surface of the wear-resistant layer in sequence, and forming a primer layer and a topcoat layer on the surface of the wear-resistant layer in sequence after curing by irradiating with a UV lamp; the coating amounts of the primer and the topcoat are independently 6-8 g / m 2 .

[0016] The present invention provides a die-pressed chamfered plastic floor prepared by the preparation method described in the above technical solution, the depth of the chamfer is 0.6-1.2 mm, and the chamfer is a regular chamfer or an irregular chamfer.

[0017] The present invention provides a preparation method for a molded chamfered plastic floor, comprising the following steps: mixing the raw materials for preparing the plastic floor to obtain a mixed raw material; successively subjecting the mixed raw material to extrusion, laminating-embossing treatment, molded chamfering treatment, ultraviolet light-curing paint coating treatment, slicing and tenoning to obtain the molded chamfered plastic floor. The present invention sets a molded chamfering treatment process between the laminating-embossing treatment process and the ultraviolet light-curing paint coating treatment process, so as to press a chamfered embossed pattern on the surface of the workpiece, making the workpiece have a chamfered shape, without the need to use a tool to cut out a bevel with a certain angle and width in the tenoning process like the traditional process to achieve the chamfering effect. By using the method provided by the present invention, a chamfering effect with a larger depth can be achieved, and the chamfered shape is easy to control, which can be a regular chamfer or a special-shaped chamfer. Just select the corresponding template for molded chamfering treatment according to actual needs, so that the paving appearance of the product can be richly presented; at the same time, the method provided by the present invention is simple to operate and suitable for large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a physical diagram of a steel plate engraved with a chamfered border in the present invention;

[0019] Figures 2 to 6 is an assembled effect diagram of the molded chamfered plastic floor in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present invention provides a preparation method for a molded chamfered plastic floor, comprising the following steps:

[0021] Mix the raw materials for preparing the plastic floor substrate material to obtain a mixed raw material;

[0022] Successively subject the mixed raw material to extrusion, laminating-embossing treatment, molded chamfering treatment, ultraviolet light-curing paint coating treatment, slicing and tenoning to obtain the molded chamfered plastic floor.

[0023] First, the raw materials for preparing the plastic floor substrate material in the present invention are described. In the present invention, by mass, the raw materials for preparing the plastic floor substrate material preferably include 100 parts of polyvinyl chloride, 200 - 400 parts of calcium carbonate, 5 - 10 parts of stabilizer, 0.6 - 6 parts of lubricant, and 5 - 20 parts of processing aid, which are described in detail below.

[0024] The raw materials for preparing the plastic floor substrate material in the present invention preferably include 100 parts of polyvinyl chloride, and the polyvinyl chloride is the main material of the plastic wood board substrate material.

[0025] Based on the parts by mass of the polyvinyl chloride, the raw materials for preparing the plastic floor substrate material in the present invention preferably include 200 to 400 parts of calcium carbonate, more preferably 300 to 350 parts. In the present invention, as an inorganic filler, the calcium carbonate is beneficial to increasing the dimensional stability of the product and reducing the cost.

[0026] Based on the parts by mass of the polyvinyl chloride, the raw materials for preparing the plastic floor substrate material in the present invention preferably include 5 to 10 parts of a stabilizer, more preferably 7 to 8 parts. In the present invention, the stabilizer is preferably a calcium-zinc composite stabilizer. In the examples of the present invention, the stabilizer of model YS-55P produced by Dongguan Yesheng Plastics Co., Ltd. is specifically used. In the present invention, the stabilizer can improve the thermal stability of PVC processing.

[0027] Based on the parts by mass of the polyvinyl chloride, the raw materials for preparing the plastic floor substrate material in the present invention preferably include 1.6 to 6 parts of a lubricant, more preferably 4 to 6 parts. In the present invention, the lubricant preferably includes an external lubricant and an internal lubricant, and the mass ratio of the external lubricant to the internal lubricant is preferably (1.0 to 1.5):1, more preferably (1.1 to 1.4):1. The present invention has no special limitation on the specific types of the external lubricant and the internal lubricant, and the external lubricant and the internal lubricant well-known to those skilled in the art can be used. In the examples of the present invention, the external lubricant of model PE wax C produced by Shanghai Saizhuang Chemical Technology Co., Ltd. is used, and the internal lubricant of model DL-60 produced by Shandong Donglin New Materials Co., Ltd. is used. In the present invention, the internal lubricant has good compatibility with PVC, which is beneficial to reducing its melt viscosity and improving its fluidity; the external lubricant has poor compatibility with PVC, and can form a lubricating layer at its interface, facilitating its flow and the demolding of the product.

[0028] Based on the parts by mass of the polyvinyl chloride, the raw materials for preparing the plastic floor substrate material in the present invention preferably include 5 to 20 parts of a processing aid, more preferably 5 to 12 parts. The present invention has no special limitation on the type of the processing aid, and the processing aid well-known to those skilled in the art can be used. In the examples of the present invention, the processing aid of model HLC-710 produced by Shandong Rike Chemical Co., Ltd. is specifically used. In the present invention, the processing aid is beneficial to improving the melt strength of the system, foaming and improving the processing fluidity.

[0029] The raw materials for preparing the plastic floor substrate material of the present invention are mixed to obtain a mixed raw material. In the present invention, the mixing is preferably carried out successively under high stirring rate and low stirring rate conditions; the high stirring rate is preferably 550 - 650 r / min, more preferably 600 r / min; the low stirring rate is preferably 250 - 350 r / min, more preferably 300 r / min. In the present invention, under the condition of high stirring rate, due to shear heat, the temperature of the material will rise. When the material temperature rises to 110 - 115 °C, it is preferably to end the high stirring rate mixing and start the low stirring rate mixing; under the condition of low stirring rate, the temperature of the material will gradually decrease. When the material temperature decreases to 50 - 60 °C, it is preferably to end the low stirring rate mixing to obtain the mixed raw material. The present invention preferably mixes the raw materials for preparing the plastic floor substrate material under the above conditions, which is beneficial to realizing the uniform dispersion of each raw material, and during the high stirring rate mixing process, the raw materials for preparation will be pre-plasticized, facilitating the subsequent extrusion process.

[0030] After obtaining the mixed raw material, the present invention successively subjects the mixed raw material to extrusion, laminating-embossing treatment, die-cut chamfering treatment, UV-curing paint coating treatment, slicing and tenoning to obtain a die-cut chamfered plastic floor. The following is a detailed description of each process for preparing the die-cut chamfered plastic floor.

[0031] The present invention extrudes the mixed raw material to obtain a substrate sheet. In the present invention, the conditions for extrusion include: the processing temperature is preferably 150 - 210 °C, more preferably 170 - 180 °C; the main machine speed is preferably 18 - 25 r / min, more preferably 20 - 23 r / min; the current is preferably 110 - 160 A, more preferably 120 - 130 A.

[0032] After the extrusion, the present invention subjects the obtained substrate sheet to laminating-embossing treatment to obtain a laminating-embossing treated part. In the present invention, the laminating-embossing treatment is preferably to sequentially laminate and bond a color film and a wear-resistant layer on one side of the substrate sheet. The present invention has no special limitation on the specific types of the color film and the wear-resistant layer, and the color film and the wear-resistant layer well-known to those skilled in the art can be used; in the present invention, the bonding temperature is preferably 150 - 200 °C, more preferably 170 - 180 °C.

[0033] After the laminating-embossing treatment, the present invention performs a die pressing chamfering treatment on the obtained laminating-embossing treatment workpiece to obtain a die pressed chamfering treatment workpiece. In the present invention, the die pressing chamfering treatment preferably uses a template engraved with a chamfer border to press out a chamfered embossed pattern on the surface of the laminating-embossing treatment workpiece, so that the laminating-embossing treatment workpiece has a chamfer shape. In the present invention, the template is preferably a steel plate. In the present invention, the pressing preferably includes a first pressing and a second pressing performed in sequence; the temperature of the first pressing and the second pressing is independently preferably 120-130 °C, more preferably 125 °C; the pressure of the first pressing is preferably 4-6 MPa, more preferably 5 MPa, and the time is preferably 5-10 s, more preferably 6 s; the pressure of the second pressing is preferably 10-19 MPa, more preferably 18 MPa, and the time is preferably 3-8 s, more preferably 4 s. The present invention preferably performs pressing under the above conditions, which can transfer the chamfer border engraved on the steel plate to the laminating-embossing treatment workpiece to form the required chamfer shape on the laminating-embossing treatment workpiece; at the same time, it ensures that the surface of the laminating-embossing treatment workpiece is not scalded and the substrate is not cracked. The method of the present invention is convenient for adjusting the depth and shape of the chamfer according to actual needs. Specifically, the depth of the chamfer can be 0.6-1.2 mm, specifically 1.0 mm; the chamfer can be a regular chamfer or an irregular chamfer, and the corresponding chamfer border can be engraved on the template according to actual needs.

[0034] After the die pressing chamfering treatment, the present invention performs an ultraviolet curable paint coating treatment on the obtained die pressed chamfering treatment workpiece to obtain a workpiece coated with ultraviolet curable paint. In the present invention, the ultraviolet curable paint coating treatment preferably includes: coating ultraviolet curable paint on the surface of the wear-resistant layer in the die pressed chamfering treatment workpiece, and forming an ultraviolet curable paint layer on the surface of the wear-resistant layer after curing by ultraviolet lamp irradiation. In the present invention, the ultraviolet curable paint preferably includes a primer and a topcoat; the ultraviolet curable paint coating treatment specifically includes: sequentially coating the primer and the topcoat on the surface of the wear-resistant layer, and sequentially forming a primer layer and a topcoat layer on the surface of the wear-resistant layer after curing by ultraviolet lamp irradiation. In the present invention, the coating amount of the primer and the topcoat is independently preferably 6-8 g / m 2 , more preferably 7 g / m 2 . The present invention does not have special limitations on the specific types of the primer and the topcoat, and the primer and the topcoat well-known to those skilled in the art can be used. In the embodiments of the present invention, a primer with the model number 971-FJS-314G of AkzoNobel Coatings (Jiaxing) Co., Ltd. is specifically used, and a topcoat with the model number 973-FJS-535GX of AkzoNobel Coatings (Jiaxing) Co., Ltd. is used. The present invention does not have special limitations on the specific operating conditions of the ultraviolet lamp irradiation curing, and the operating conditions well-known to those skilled in the art can be used.

[0035] After the ultraviolet curable paint coating treatment, the present invention successively slices and cuts tenon grooves on the obtained workpiece coated with the ultraviolet curable paint to obtain a die-pressed chamfered plastic floor. The present invention has no special limitation on the slicing and cutting of tenon grooves, and the slicing and cutting of tenon grooves can be carried out according to the product specifications by using the methods well-known to those skilled in the art. Since the present invention forms a chamfer through the die-pressed chamfering treatment process, when cutting the tenon groove in the present invention, there is no need to additionally use a tool to cut out a bevel with a certain angle and width to achieve the chamfering effect as in the traditional preparation process.

[0036] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the embodiments in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] The sources of some raw materials involved in the following embodiments are as follows:

[0038] The calcium-zinc composite stabilizer is purchased from Dongguan Yesheng Plastic Co., Ltd., and the model is YS-55P;

[0039] The external lubricant is purchased from Shanghai Saizhuang Chemical Technology Co., Ltd., and the model is PE wax C type;

[0040] The internal lubricant is purchased from Shandong Donglin New Materials Co., Ltd., and the model is DL-60;

[0041] The processing aid is purchased from Shandong Rike Chemical Co., Ltd., and the model is HLC-710;

[0042] The primer is purchased from AkzoNobel Coatings (Jiaxing) Co., Ltd., and the model is 971-FJS-314G;

[0043] The topcoat is purchased from AkzoNobel Coatings (Jiaxing) Co., Ltd., and the model is 973-FJS-535GX.

[0044] Example 1

[0045] By mass, 100 parts of PVC, 350 parts of calcium carbonate, 8 parts of calcium-zinc composite stabilizer, 2.5 parts of external lubricant, 2.2 parts of internal lubricant and 5 parts of processing aid are mixed, and stirred at 600 r / min until the material temperature reaches 110 °C, and then continuously stirred at 300 r / min until the material temperature reaches 55 °C to obtain a mixed material;

[0046] The mixed material is extruded to obtain a substrate plate; the operating conditions of the extrusion include: the processing temperature is 180 °C, the main engine speed is 23 r / min, and the current is 130 A;

[0047] At a temperature of 170 °C, a color film and a wear-resistant layer are sequentially laminated and adhered to one side of the base board to obtain a laminated-embossed workpiece;

[0048] Use a steel plate engraved with a chamfered border (as Figure 1 shown), press a chamfered embossed pattern on the surface of the laminated-embossed workpiece to make the laminated-embossed workpiece have a chamfered shape, and obtain a molded chamfered workpiece; wherein, the pressing conditions are specifically: pressing for 6 s at 125 °C and 5 MPa, and then pressing for 4 s at 125 °C and 18 MPa; the chamfer depth in the molded chamfered workpiece is 1.0 mm;

[0049] On the surface of the wear-resistant layer of the molded chamfered workpiece, a primer and a topcoat are sequentially coated, and after being cured by ultraviolet lamp irradiation, a primer layer and a topcoat layer are sequentially formed on the surface of the wear-resistant layer to obtain a workpiece coated with ultraviolet-curable paint; wherein, the coating amounts of the primer and the topcoat are both 7 g / m 2 ;

[0050] According to the product specifications, the workpiece coated with ultraviolet-curable paint is sequentially sliced and tenoned to obtain a molded chamfered plastic floor.

[0051] Figures 2 to 6 is the assembly effect diagram of the molded chamfered plastic floor. As can be seen from Figures 2 to 6 it, using the method provided by the present invention can make the molded chamfered plastic floor have a chamfer effect with stronger three-dimensional sense, making the molded chamfered plastic floor present the effect of hand-scraped chamfer of solid wood floor, so that it has a stronger solid wood feeling and design sense.

[0052] Example 2

[0053] By mass, 100 parts of PVC, 300 parts of calcium carbonate, 10 parts of calcium-zinc composite stabilizer, 2.7 parts of external lubricant, 2.0 parts of internal lubricant and 8 parts of processing aid are mixed, and stirred at 600 r / min until the material temperature reaches 110 °C, and then continue to stir at 300 r / min until the material temperature reaches 55 °C to obtain a mixed material;

[0054] The mixed material is extruded to obtain a base board; the operating conditions of the extrusion include: the processing temperature is 200 °C, the main engine speed is 18 r / min, and the current is 110 A;

[0055] At a temperature of 170 / 180 / 200 °C, a color film and a wear-resistant layer are sequentially laminated and adhered to one side of the base board to obtain a laminated-embossed workpiece;

[0056] Use a steel plate engraved with a chamfered border to press a chamfered embossed pattern on the surface of the laminating-embossing processed part, so that the laminating-embossing processed part has a chamfered shape, and obtain a molded chamfered processed part; among them, the pressing conditions are specifically: press for 6 s under the conditions of 125 °C and 5 MPa, and then press for 4 s under the conditions of 125 °C and 18 MPa; the chamfer depth in the molded chamfered processed part is 1.0 mm;

[0057] On the surface of the wear-resistant layer in the molded chamfered processed part, apply primer and topcoat in sequence. After curing by ultraviolet lamp irradiation, a primer layer and a topcoat layer are formed on the surface of the wear-resistant layer in sequence, and obtain a part coated with ultraviolet-curable paint; among them, the coating amounts of the primer and the topcoat are both 7 g / m 2 ;

[0058] According to the product specifications, sequentially slice and cut mortises on the part coated with ultraviolet-curable paint to obtain a molded chamfered plastic floor.

[0059] Example 3

[0060] By mass, mix 100 parts of PVC, 200 parts of calcium carbonate, 10 parts of calcium-zinc composite stabilizer, 2.5 parts of external lubricant, 2.2 parts of internal lubricant and 12 parts of processing aid, and stir at 600 r / min until the material temperature reaches 110 °C, and then continue to stir at 300 r / min until the material temperature reaches 55 °C to obtain a mixed material;

[0061] Extrude the mixed material to obtain a base plate; the operating conditions for the extrusion include: the processing temperature is 180 °C, the main machine speed is 20 r / min, and the current is 120 A;

[0062] At a temperature of 200 °C, stack and laminate a color film and a wear-resistant layer on one side of the base plate in sequence to obtain a laminating-embossing processed part;

[0063] Use a steel plate engraved with a chamfered border (as Figure 1 shown), press a chamfered embossed pattern on the surface of the laminating-embossing processed part, so that the laminating-embossing processed part has a chamfered shape, and obtain a molded chamfered processed part; among them, the pressing conditions are specifically: press for 6 s under the conditions of 125 °C and 5 MPa, and then press for 4 s under the conditions of 125 °C and 18 MPa; the chamfer depth in the molded chamfered processed part is 1.0 mm;

[0064] On the surface of the wear-resistant layer in the molded chamfered processed part, apply primer and topcoat in sequence. After curing by ultraviolet lamp irradiation, a primer layer and a topcoat layer are formed on the surface of the wear-resistant layer in sequence, and obtain a part coated with ultraviolet-curable paint; among them, the coating amounts of the primer and the topcoat are both 7 g / m 2 ;

[0065] According to the product specifications, the parts coated with ultraviolet curable paint are successively sliced and tenoned to obtain a molded chamfered plastic floor.

[0066] Comparative Example 1

[0067] Prepare the molded chamfered plastic floor according to the method of Example 1, except that the pressing conditions are: pressing at 140 °C and 18 Mpa for 20 s; the chamfering effect of the obtained molded chamfered parts meets the requirements, but the surface is scalded and the substrate is cracked.

[0068] Comparative Example 2

[0069] Prepare the molded chamfered plastic floor according to the method of Example 1, except that the pressing conditions are: pressing at 120 °C and 10 Mpa for 10 s; the chamfering depth of the obtained molded chamfered parts does not meet the requirements, the surface is not scalded, and the substrate is not cracked.

[0070] Comparative Example 3

[0071] Prepare the molded chamfered plastic floor according to the method of Example 1, except that the pressing conditions are: pressing at 125 °C and 18 Mpa for 10 s; the chamfering effect of the obtained molded chamfered parts meets the requirements, the surface is not scalded, but the substrate is cracked.

[0072] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A preparation method of a die-pressed chamfered plastic floor, comprising the following steps: Mix the raw materials for preparing the plastic floor substrate material to obtain a mixed raw material; by mass, the raw materials for preparing the plastic floor substrate material include 100 parts of polyvinyl chloride, 200 - 400 parts of calcium carbonate, 5 - 10 parts of stabilizer, 0.6 - 6 parts of lubricant, and 5 - 20 parts of processing aid; the lubricant includes an external lubricant and an internal lubricant, and the mass ratio of the external lubricant to the internal lubricant is (1.0 - 1.5):1; the mixing is carried out successively under high stirring rate and low stirring rate conditions; the high stirring rate is 550 - 650 r / min, and the low stirring rate is 250 - 350 r / min; when the material temperature rises to 110 - 115 °C, the high stirring rate mixing ends and the low stirring rate mixing starts; when the material temperature drops to 50 - 60 °C, the low stirring rate mixing ends; Successively extrude, laminate-emboss, die-press chamfer, apply ultraviolet-curable paint, slice, and cut tenons and grooves to the mixed raw material to obtain a die-pressed chamfered plastic floor; The conditions for the extrusion include: the processing temperature is 150 - 210 °C, the main machine speed is 18 - 25 r / min, and the current is 110 - 160 A; The laminate-emboss treatment includes: successively laminate and adhere a color film and a wear-resistant layer on one side of the substrate sheet obtained after the extrusion; the temperature for the adhesion is 150 - 200 °C; The die-press chamfer treatment includes: using a template engraved with a chamfer border to press a chamfered embossed pattern on the surface of the laminate-embossed part obtained after the laminate-emboss treatment, so that the laminate-embossed part has a chamfer shape; the depth of the chamfer is 1.0 - 1.2 mm; The pressing includes a first pressing and a second pressing carried out successively; the temperature for the first pressing is 120 - 125 °C, the pressure is 4 - 6 MPa, and the time is 5 - 10 s; the temperature for the second pressing is 120 - 125 °C, the pressure is 10 - 19 MPa, and the time is 3 - 8 s.

2. The preparation method according to claim 1, wherein The ultraviolet-curable paint coating treatment includes: coating ultraviolet-curable paint on the surface of the wear-resistant layer in the die-pressed chamfered part obtained after the die-press chamfer treatment, and forming an ultraviolet-curable paint layer on the surface of the wear-resistant layer after curing by ultraviolet lamp irradiation.

3. The preparation method according to claim 2, characterized in that, The ultraviolet curable paint includes a primer and a topcoat. The coating treatment with the ultraviolet curable paint specifically includes: sequentially coating the primer and the topcoat on the surface of the wear-resistant layer, and after curing by irradiation with an ultraviolet lamp, a primer layer and a topcoat layer are sequentially formed on the surface of the wear-resistant layer; the coating amounts of the primer and the topcoat are independently 6-8 g / m 2 .

4. The die-pressed chamfered plastic floor prepared by the preparation method according to any one of claims 1 - 3, the depth of the chamfer is 1.0 - 1.2 mm, and the chamfer is a regular chamfer or a special-shaped chamfer.

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