Preparation method for reinforced film-coated floor

Abstract

The present invention belongs to the technical field of wood-plastic floors, and relates to a preparation method for a reinforced film-coated floor. The preparation method for a reinforced film-coated floor comprises the steps of: providing a substrate and a prefabricated wear-resistant layer; treating a lubricating wax on a surface of the substrate, and performing a corona treatment; applying a primer layer and printing a pattern; performing a corona treatment on the wear-resistant layer; applying a first adhesive layer to bond the substrate and the wear-resistant layer by means of hot pressing. In the present invention, by providing a layered reinforcement inside the substrate, the compressive strength and the elastic modulus of the floor are increased, thereby enabling the use of a larger span when the floor is laid, reducing the amount of keels used and the laying cost, and improving the laying efficiency. By applying the prefabricated wear-resistant layer on a surface of a thermoplastic shell, the amount of a UV-curable resin used is reduced, and the production cost is reduced.

Description

Preparation method of reinforced laminated floor TECHNICAL FIELD

[0001] The present application relates to a preparation method of laminated floor, and belongs to the technical field of laminated floor. BACKGROUND

[0002] The general production process of wood-plastic floor is to first extrude wood-plastic mixed raw materials through an extruder and a mold to form a base plate, and then use a pattern roller to press wood grain on the base plate. However, the wood grain formed in this way not only has a single pattern, but also lacks realism.

[0003] In order to improve the simulation degree of wood grain, targeted research and development have been carried out in the industry. Patent document CN109653465A discloses a production method of PVC decorative plate with 3D effect, which includes the following steps: coating UV primer on the upper surface of the PVC plate base material and irradiating and curing; coating UV white paint and irradiating and curing; printing a pattern; coating UV wear-resistant paint and irradiating and curing; printing a concave-convex effect layer and irradiating and curing; coating UV topcoat and irradiating and curing. TECHNICAL PROBLEM

[0004] 3D printing technology can improve the simulation degree of wood grain, but this floor production relies on expensive production lines and requires a large amount of UV resin for coating, making it difficult to reduce material costs. In addition, floors installed using the keel method need to have a high Young's Modulus, otherwise they are prone to bending and deformation during use, which seriously affects user experience. TECHNICAL SOLUTION

[0005] The present application solves the above technical problems and provides a preparation method of reinforced laminated floor.

[0006] The technical solution of the present application to solve the above problems is as follows:

[0007] A preparation method of reinforced laminated floor, the reinforced laminated floor comprising

[0008] a base material including a foamed core formed of foamed plastic, a thermoplastic shell covering the foamed core, and a layered reinforcement provided between the foamed core and the thermoplastic shell;

[0009] a decorative layer covering the base material, including a primer layer and a pattern layer provided based on the primer layer;

[0010] a preformed wear-resistant layer covering the decorative layer and serving as a protective layer;

[0011] a first adhesive layer provided between the decorative layer and the preformed wear-resistant layer, having repeating urethane segments in the molecular structure;

[0012] The preparation method comprises the following steps:

[0013] S1, providing a substrate and a prefabricated wear-resistant layer;

[0014] S2, applying a cleaning agent to the surface of the substrate for treating the lubricating wax on the surface of the substrate, and then performing corona treatment;

[0015] S3, applying a primer layer to the surface of the substrate, printing a pattern on the primer layer using an industrial printer to form a decorative layer;

[0016] S4, corona treatment is performed on the wear-resistant layer, and the darcy value is controlled to be above 50;

[0017] S5, applying the first adhesive layer on the decorative layer, or applying the first adhesive layer on the back surface of the wear-resistant layer, and then hot pressing the substrate and the wear-resistant layer;

[0018] S6, placing for more than 36 hours.

[0019] The main idea of the above technical solution of the present application mainly embodies in two aspects: one is to set a layered reinforcing structure in the substrate, combine the light weight characteristics of the foamed core with the significant improvement of the Young's modulus of the layered reinforcing body, and cooperatively coat the thermoplastic shell to construct a light weight, high strength and stable structure substrate; the second is to innovatively use a prefabricated wear-resistant layer to directly cover the decorative layer, replacing the UV wear-resistant layer which needs to be coated in large quantities and is prone to shrinkage due to solidification in the existing process, which not only avoids the warping of the product, but also significantly reduces the production cost.

[0020] The core structure of the reinforced laminated flooring prepared by the technical solution realizes performance breakthrough through multi-layer collaborative design: the foamed core provides lightweight basis, the layered reinforcing body precisely improves the rigidity of the substrate, and the thermoplastic shell gives the overall structure covering property and basic protection; the decorative layer is composed of a primer layer and a pattern layer printed by an industrial printer, the primer layer has the functions of improving the bonding strength and covering force of the pattern layer, and the pattern layer provides diversified decorative effects; the prefabricated wear-resistant layer covering the surface directly bears the key protection functions of scratch resistance and wear resistance. The first adhesive layer with repeating urethane segments in the molecular chain is used to reliably bond between the functional layers, and is tightly bonded through the hot pressing process. The adhesive layer can be flexibly arranged on the decorative layer or the wear-resistant layer.

[0021] In the preparation process, the surface lubricating wax is removed by targeted cleaning of the substrate and wear-resistant layer, corona treatment is carried out, and the substrate and wear-resistant layer are controlled to have a da Vinci value greater than or equal to 50 to optimize the interface bonding, an industrial printer is used to print a pattern on the primer layer to form a decorative layer, a first adhesive layer containing a repeating urethane segment in the molecular chain is applied, and finally the layers are tightly attached through a hot pressing process, and the whole is rested for more than 36 hours. The scheme significantly improves the mechanical strength, decoration, wear resistance and durability, and economy of the floor through the dual synergy of structural design (lightweight high-strength substrate and prefabricated wear-resistant layer) and process optimization (corona treatment, adaptive adhesive and hot pressing attachment), solving the technical bottleneck of traditional laminated flooring in cost control and performance balance.

[0022] In the research and development process, the inventors once used a heat transfer printing technology to transfer a pattern to a carrier film, because the heat transfer printing technology is more mature and has lower requirements for equipment. In order to improve the effect of heat transfer printing, an adhesive needs to be coated on the carrier film. However, when the transfer film is removed, the transfer film is very difficult to remove, and even defective products occur due to incomplete removal of the transfer film. However, if the resting time is controlled within 10 hours, the transfer film can be easily removed; but this brings a new problem, the adhesive strength between the transferred pattern and the carrier film will decrease significantly, and the inventors analyze that this is due to the destruction of the initial adhesion between the transferred pattern and the carrier film when the transfer film is removed. Therefore, the inventors abandoned the transfer printing scheme and adopted direct printing.

[0023] As a preferred embodiment of the above technical scheme, the cleaning agent is dichloromethane.

[0024] As a preferred embodiment of the above technical scheme, the prefabricated wear-resistant layer is selected from one of PET, PETG, ASA, PC, PMMA, or a mixed resin formed by any of these resins.

[0025] As a preferred embodiment of the above technical scheme, in step S3, the primer layer is applied to the surface of the substrate in stages, with 8-15 g / m2 applied the first time, and a second treatment is carried out after curing; the total application amount is 25-50 g / m2.

[0026] As a further preferred embodiment of the above technical scheme, the first-applied primer does not contain titanium white, and the second-applied primer contains titanium white with hiding power.

[0027] As a further preferred embodiment of the above technical solution, the first applied primer comprises the following components by mass fraction: 85% acrylate, 3.5% photoinitiator 184, 1.5% photoinitiator TPO, 10.0% reactive diluent hydroxyethyl acrylate; the second applied primer comprises the following components by mass fraction: 75% acrylate, 3.5% photoinitiator 184, 1.5% photoinitiator TPO, 10.0% reactive diluent hydroxyethyl acrylate, 10% titanium white.

[0028] As a preferred embodiment of the above technical solution, the layered reinforcement is formed by a grid of reinforcing fibers impregnated with a thermosetting resin.

[0029] As a preferred embodiment of the above technical solution, the matrix resin of the foamed core and the thermoplastic shell is polyolefin / polyvinyl chloride.

[0030] Another object of the present application is to provide another method for preparing a reinforced laminated flooring.

[0031] The technical solution is as follows:

[0032] A method for preparing a reinforced laminated flooring, the reinforced laminated flooring comprising

[0033] a substrate comprising a foamed core formed of foamed plastic, a thermoplastic shell covering the foamed core, and a layered reinforcement disposed between the foamed core and the thermoplastic shell;

[0034] a decorative layer covering the substrate;

[0035] a pre-prepared wear-resistant layer covering the decorative layer and serving as a protective layer;

[0036] a first adhesive layer disposed between the decorative layer and the pre-prepared wear-resistant layer and having repeating urethane segments;

[0037] The decorative layer comprises a pre-prepared carrier film and a pattern layer disposed based on the pre-prepared carrier film, and the pre-prepared carrier film is connected to the substrate through a second adhesive layer.

[0038] The preparation method comprises the following steps:

[0039] S1, providing a substrate and a pre-prepared wear-resistant layer;

[0040] S2, applying a cleaning agent to the surface of the substrate for treating the lubricating wax on the surface of the substrate, and then performing corona treatment;

[0041] S3, providing a pre-prepared carrier film, and performing corona treatment on both sides of the carrier film to control the dale value to be above 46;

[0042] S4, printing a pattern on the carrier film by using an industrial printer to form a decorative layer;

[0043] S5, applying a second adhesive layer on the substrate, or applying a second adhesive layer on the back surface of the decorative layer, and then hot-pressing the decorative layer and the substrate;

[0044] S6, placing for more than 16 hours;

[0045] S7, performing corona treatment on the pre-prepared wear-resistant layer, and controlling the dynes value to be more than 50;

[0046] S8, applying a first adhesive layer on the decorative layer, or applying a first adhesive layer on the back surface of the wear-resistant layer, and then hot-pressing the substrate and the wear-resistant layer;

[0047] S9, placing for more than 36 hours.

[0048] The products prepared according to the above two methods are slightly different in structure, and the main difference is that: in the first scheme, when the pattern layer is prepared on the substrate, in order to improve the bonding force between the pattern and the substrate, a primer is coated on the substrate, and since the primer is located on the lower surface of the pattern layer, the primer can be a color paint, such as a small amount of titanium dioxide is added to make the background color white, so as to cover the substrate and eliminate the color difference of the background color due to different batches; the second scheme is to set the pattern on the surface of the pre-prepared carrier film by using a flatbed inkjet printer to prepare a color film with a realistic pattern; then a first adhesive layer is coated on the pattern surface of the color film or the wear-resistant layer, and the pattern layer and the wear-resistant layer are attached; finally, a second adhesive layer is coated on the back surface of the color film or the substrate, so that the pattern layer and the substrate are attached.

[0049] The same situation is that a UV protective layer can be further provided on the pattern layer to protect the pattern and make the pattern layer and the wear-resistant layer more firmly attached.

[0050] As a preferred embodiment of the above technical scheme, the cleaning agent is dichloromethane.

[0051] In the research and development process, the inventors found that the second adhesive layer always cracked. At first, the inventors polished and performed corona treatment on the substrate, and the problem was obviously improved, but the cracking problem still occurred from time to time. It is believed that the cause is the oil bleeding of the thermoplastic shell of the substrate. The so-called oil bleeding refers to that, in the production process of the substrate, in order to facilitate molding and extrusion, some processing aids such as polyethylene wax and stearate are often added to the material; these substances will slowly separate from the thermoplastic shell over time, and gradually accumulate at the interface between the thermoplastic shell and the second adhesive layer; since these substances have poor adhesion, when the accumulation phase is formed, the second adhesive layer is prone to cracking.

[0052] In the technical scheme, dichloromethane is sprayed on the surface of the substrate first, and then a cloth or paper is used to wipe clean, so that the processing aid rich phase which is difficult to be observed by naked eyes can be effectively removed; then the thermoplastic shell is polished and subjected to corona treatment, the polishing is to increase the surface roughness and provide more microscopic contact area; the corona treatment is an electric shock treatment, which makes the chemical bonds of the plastic molecules partially broken, and generates carbonyl, hydroxyl and other groups with strong polarity, so that the surface of the object has higher adhesion and cohesiveness; thus the adhesive strength between the pattern layer and the substrate is improved, and the cracking of the second adhesive layer is avoided.

[0053] As a preferred embodiment of the above technical scheme, the pre-prepared wear-resistant layer is selected from one of PET, PETG, ASA, PC and PMMA, or a mixed resin formed by any of these resins.

[0054] As a further preferred embodiment of the above technical scheme, the pre-prepared wear-resistant layer is a PMMA film.

[0055] When PMMA is used, the PMMA not only has good mechanical properties such as wear resistance and surface hardness, but also has good performance in blocking ultraviolet rays in natural light, so that the product is less likely to fade.

[0056] As a preferred embodiment of the above technical scheme, the base resin of the foamed core and the thermoplastic shell is polyolefin / polyvinyl chloride.

[0057] As a preferred embodiment of the above technical scheme, the layered reinforcement is formed by impregnating a reinforcing fiber grid with a thermosetting resin.

[0058] Since the substrate of the present application further comprises a layered reinforcement and a thermoplastic shell, the preparation process of the foamed core is combined with other processes.

[0059] As a preferred embodiment of the above technical scheme, the substrate is prepared by the following method comprising the following steps:

[0060] 1) feeding raw materials containing base resin into the main flow channel of the mold through the main extruder to form a pressure-maintaining core;

[0061] 2) feeding the layered reinforcement into the reinforcement material channel of the mold;

[0062] 3) feeding the resin raw materials of the thermoplastic shell into the co-extrusion flow channel of the co-extrusion mold through the auxiliary extruder; extruding the resin from the co-extrusion flow channel to form a thermoplastic shell with a frame-shaped cross section;

[0063] 4) extruding the pressure-maintaining core, the layered reinforcing body and the thermoplastic shell from their respective independent flow channels to form a mold blank; at the same time, feeding the mold blank into a shaping mold, and making the pressure-maintaining core foam in the thermoplastic shell constrained by the inner wall of the shaping mold, so as to fill the thermoplastic shell, and at the same time, completing the compounding and cooling shaping of the mold blank in the shaping mold to obtain the base material.

[0064] As to the specific problem of how to implant the layered reinforcing body in the base material, the conventional practice of those skilled in the art is to connect the reinforcing material channel with the main flow channel, so as to melt the layered reinforcing body into the foaming layer and extrude it.

[0065] However, the problem is that the main flow channel has a high pressure, and once the reinforcing material channel is connected with the main flow channel, the pressure will be released in the opposite direction along the reinforcing material channel, and the material in the main flow channel will be extruded into the reinforcing material channel, and even further foamed, so as to block the reinforcing material channel, making it difficult to continue to input the layered reinforcing body, and forcing the production to be interrupted; usually, the mold needs to be disassembled and the reinforcing material channel needs to be cleaned within a very short production cycle. Moreover, due to the early pressure release, the foaming core is difficult to control in quality. Even if a check mechanism is provided at the outlet of the reinforcing material channel, it cannot completely prevent the occurrence of such adverse conditions.

[0066] In the above technical solution of the present application, the above problems are solved by changing the production method and modifying the mold. The main aspects are as follows: 1) the main flow channel is designed to maintain pressure in the entire mold; 2) the reinforcing material channel and the co-extrusion flow channel are independent of the main flow channel, and are merged at the port of the mold discharge plate; 3) a shaping mold is installed at the outlet of the mold; 1) the concept of forming a composite board from the outlet of the mold is abandoned; 2) the concept of using a thermoplastic shell to cover the already formed foaming core is abandoned, and a prefabricated thermoplastic shell is used to fill the already formed thermoplastic shell with a foaming core to be foamed, and the layered reinforcing body is inserted before filling. In the present application, the filling is not continuously feeding the filling material into the thermoplastic shell, but is realized by the automatic foaming and expansion of the pressure-maintaining core after it comes out of the pressure-maintaining main flow channel; therefore, the mold blank needs to be immediately fed into the shaping mold after being extruded from the mold, and the shaping mold is used to constrain the thermoplastic shell, so that the pressure-maintaining core foams in the thermoplastic shell constrained by the inner wall of the shaping mold, and the thermoplastic shell is filled. At the same time, the shaping mold can be placed in a water tank to improve the cooling and shaping effect of the shaping mold. Advantages

[0067] In summary, the present application has the following advantages:

[0068] 1. This invention improves the compressive strength and elastic modulus of the floor by setting layered reinforcements inside the substrate, which can increase the span when laying the floor, reduce the amount of joists used, reduce the laying cost, and improve the laying efficiency.

[0069] 2. This invention reduces the thermal shrinkage rate of the floor by setting a layered reinforcement inside the substrate, eliminating the need for a balancing layer;

[0070] 3. This invention reduces the amount of UV-curable resin used by attaching a pre-made wear-resistant layer to the surface of the thermoplastic shell, thereby reducing production costs;

[0071] 4. The wear-resistant layer of this invention is made of PMMA material, which has the advantages of high hardness, wear resistance and yellowing resistance. Attached Figure Description

[0072] Figure 1 is a structural schematic diagram of the reinforced membrane flooring;

[0073] Figure 2 is a schematic diagram of the surface structure of Example 1;

[0074] Figure 3 is a schematic diagram of the surface structure of Example 2;

[0075] In the diagram, 1-substrate, 2-decorative layer, 3-wear-resistant layer;

[0076] 11-Foamed core, 12-Layered reinforcement, 13-Thermoplastic shell;

[0077] 21-Primer layer, 21'-Pre-formed carrier film, 22-Patterned layer;

[0078] 201 - First adhesive layer, 202 - Second adhesive layer. The best embodiment of the present invention

[0079] Example 1

[0080] As shown in Figures 1 and 2, an enhanced coated floor includes a substrate 1, a decorative layer 2, and a prefabricated wear-resistant layer 3 arranged sequentially; a first adhesive layer 201 is disposed between the decorative layer 2 and the wear-resistant layer 3; and a second adhesive layer 202 is disposed between the decorative layer 2 and the substrate 1. The decorative layer 2 is formed by a pattern layer 22 disposed on a prefabricated carrier film 21'.

[0081] The substrate 1 is resin-based, as shown in Figure 1, and includes a foam core 11, a layered reinforcement 12 and a thermoplastic shell 13. The thermoplastic shell 13 covers the foam core 11, and the layered reinforcement 12 is disposed between the foam core 11 and the thermoplastic shell 13.

[0082] Specifically, the foam core 11 is a PVC foam product with a density of approximately 0.8 g / m³.

[0083] The layered reinforcement 12 is a glass fiber mesh impregnated with ABS.

[0084] The thermoplastic shell 13 is unfoamed or low-foamed PVC.

[0085] In this embodiment, the pre-prepared carrier film 21' of the carrier layer 21 is a PVC white film.

[0086] The preparation method of the above-mentioned laminated floor is as follows:

[0087] S1, providing a substrate and a pre-prepared wear-resistant layer, the wear-resistant layer being a PMMA sheet with a thickness of about 0.5 mm;

[0088] S2, applying dichloromethane on the surface of the substrate for treating the surface of the substrate, and then wiping clean with a cleaning cloth;

[0089] S3, providing a PVC white film, which is corona treated on both sides, and the dielectric value of the corona treatment reaches 46;

[0090] S4, printing a pattern on the PVC white film by a flatbed inkjet printer, and curing the pattern layer to prepare a PVC color film with a pattern layer; the pattern layer is formed after curing the water-based color paste, and the amount used is about 30 mL / ㎡;

[0091] S5, applying polyurethane hot melt adhesive on the non-printed side of the PVC color film, and then hot pressing the decorative layer and the substrate;

[0092] S6, standing for 16 hours;

[0093] S7, corona treating the wear-resistant layer, and the dielectric value of the corona treatment reaches 50;

[0094] S8, applying polyurethane hot melt adhesive on the corona treated side of the wear-resistant layer, and then hot pressing the substrate and the wear-resistant layer;

[0095] S9, standing for 36 hours.

[0096] The substrate 1 is prepared by the following method:

[0097] 1) feeding raw materials containing base resin into the main flow channel of the mold through the main extruder to form a pressure maintaining core;

[0098] 2) feeding the layered reinforcement into the reinforcement material channel of the mold;

[0099] 3) feeding the raw materials of the thermoplastic shell into the co-extrusion flow channel of the co-extrusion mold through the auxiliary extruder; extruding the resin from the co-extrusion flow channel to form a thermoplastic shell with a frame-shaped cross section;

[0100] 4) extruding the pressure maintaining core, the layered reinforcing body and the thermoplastic shell from the respective independent flow channels to form a mold blank; at the same time, feeding the mold blank into a shaping mold, and foaming the pressure maintaining core in the thermoplastic shell constrained by the inner wall of the shaping mold to fill the thermoplastic shell, and completing the compounding and cooling shaping of the mold blank in the shaping mold to obtain the base material.

[0101] A co-extrusion die for preparing the floor above comprises the following structure:

[0102] The co-extrusion die is provided with a main flow channel, a reinforcing material channel and a co-extrusion flow channel;

[0103] The main flow channel, the reinforcing material channel and the co-extrusion flow channel are independent of each other in the die and converge at the outlet of the co-extrusion die;

[0104] The reinforcing material channel comprises a first channel and a second channel distributed on both sides of the main flow channel;

[0105] The first channel has a first discharge port in the shape of a Chinese character and the second channel has a second discharge port in the shape of a Chinese character;

[0106] The discharge port of the co-extrusion flow channel is in the shape of a rectangular ring and is sleeved around the discharge port of the main flow channel, and the first discharge port is arranged between the upper edge frame of the discharge port of the main flow channel and the upper edge frame of the outlet of the co-extrusion flow channel, and the second discharge port is arranged between the lower edge frame of the discharge port of the main flow channel and the lower edge frame of the outlet of the co-extrusion flow channel. Embodiment of the present application

[0107] Example 2

[0108] As shown in FIG. 1 and FIG. 3, an enhanced laminated floor comprises a base material 1, a decorative layer 2 and a prefabricated wear-resistant layer 3; wherein a first adhesive layer 201 is arranged between the decorative layer 2 and the wear-resistant layer 3.

[0109] The base material 1 is resin-based, as shown in FIG. 1, comprising a foamed core 11, a layered reinforcing body 12 and a thermoplastic shell 13, the thermoplastic shell 13 covering the foamed core 11, and the layered reinforcing body 12 being arranged between the foamed core 11 and the thermoplastic shell 13. The decorative surface of the base material 1 is provided with a primer layer 21.

[0110] Specifically, the foamed core 11 is a PVC foamed product with a density of about 0.8 g / m³.

[0111] The layered reinforcing body 12 is a glass fiber mesh cloth impregnated with ABS.

[0112] The thermoplastic shell 13 is unfoamed or low-foamed PVC.

[0113] The preparation method of the laminated floor above is as follows:

[0114] S1, provide a substrate and a pre-prepared wear-resistant layer, the wear-resistant layer is made of PMMA sheet with a thickness of about 0.5mm;

[0115] S2, apply dichloromethane on the surface of the substrate for treating the surface of the substrate, wipe clean with a cleaning cloth, and then perform corona treatment;

[0116] S3, apply a primer layer on the surface of the substrate and irradiate for curing; the primer formulation is: 75% acrylate, 3.5% photoinitiator 184, 1.5% photoinitiator TPO, 10.0% diluent hydroxyethyl acrylate, 10% titanium white; the amount is 10g / ㎡;

[0117] S4, use an industrial printer to print a pattern on the primer layer to form a pattern layer, and cure the pattern layer; the pattern layer is formed after curing the water-based color paste, and the amount is about 30mL / ㎡;

[0118] S5, perform corona treatment on the wear-resistant layer, and control the dyne value to be above 50;

[0119] S6, apply polyurethane hot melt adhesive on the corona surface of the wear-resistant layer, and then hot-press the substrate and the wear-resistant layer;

[0120] S7, stand for 36 hours.

[0121] Comparative Example One

[0122] According to the patent document CN 110670839B, a foamed floor with wood grain texture is made.

[0123] According to the relevant content of BS EN 15534-1-2014+A1-2017, the products of Example One, Example Two and Comparative Example One are tested to determine their bending failure load, bending strength, bending elastic modulus and thermal shrinkage, and the results are shown in Table 1.

[0124] Table 1 Comparison of product performance of examples and comparative examples

[0125]

[0126] As can be seen from Table 1, in the three-point bending test, whether at room temperature of 23℃ or at high temperature of 75℃, the bending failure load, bending strength and bending elastic modulus of Example One and Example Two are far beyond the corresponding detection requirements, and are significantly better than Comparative Example 1, indicating that through measures such as setting a layered reinforcing structure, the mechanical strength and deformation resistance of the floor can be effectively improved; in the heat shrinkage test (100℃, 1h), the heat shrinkage rate of Example One and Example Two is extremely low, meeting the requirements, while the heat shrinkage rate of Comparative Example One is far beyond the standard limit, indicating that the use of a prefabricated wear-resistant layer and other designs can significantly improve the dimensional stability of the floor at high temperatures. In summary, the floor prepared by the technical scheme performs better in mechanical properties and dimensional stability than the traditional scheme.

[0127] The following describes the wear resistance test and immersion peeling test of Example One and Example Two.

[0128] The wear resistance test is performed according to EN 660-2, and the mass loss per 100 revolutions is calculated.

[0129] The immersion peeling test is performed according to GB / T 17657-2013.

[0130] The wear resistance test results are shown in Table 2. The immersion peeling test results are shown in Table 3.

[0131] Table 2 Wear resistance test results of examples

[0132]

[0133] Table 3 Immersion peeling test results of examples

[0134]

[0135] As can be seen from Table 2, when performing the wear resistance test, the thickness of the covering film of Example 1 and Example 2 is 0.5mm, and the mass loss is 55mg / 100r, indicating that the surface wear resistance of both is good and consistent, and the prefabricated wear-resistant layer can effectively resist friction loss.

[0136] As can be seen from Table 3, in the immersion peeling test, the immersion peeling value of Example 1 and Example 2 is 0mm, indicating that the floor layers are firmly combined and have good immersion peeling resistance, and the floor prepared by the technical scheme performs excellent in wear resistance and interlayer bonding.

Claims

1. A method for manufacturing a reinforced laminated floor, said reinforced laminated floor comprising - a substrate (1) comprising a foamed core (11) formed of foamed plastic, a thermoplastic shell (13) covering said foamed core, and a layered reinforcement (12) disposed between said foamed core (11) and thermoplastic shell (13); - a decorative layer (2) covering said substrate, comprising a primer layer (21) and a pattern layer (22) disposed based on said primer layer; - a preformed wear-resistant layer (3) covering said decorative layer, serving as a protective layer; - a first adhesive layer (201) disposed between said decorative layer and said preformed wear-resistant layer, having repeating urethane segments in the molecular structure; characterized in that said method comprising the following steps: S1. providing a substrate (1) and a preformed wear-resistant layer (3); S2. applying a cleaning agent to the surface of said substrate (1) for treating the lubricating wax on the surface of the substrate, followed by corona treatment; S3. applying a primer layer (21) to the surface of said substrate (1), and printing a pattern on said primer layer using an industrial printer to form a decorative layer (2); S4. corona treating said wear-resistant layer (3) to control the dacy value to be above 50; S5. applying said first adhesive layer (201) to said decorative layer (2) or to the back surface of the wear-resistant layer (3), and then hot-pressing said substrate (1) and wear-resistant layer (3) together; S6. placing for more than 36 hours.

2. The method of claim 1, wherein: Said cleaning agent is dichloromethane.

3. The method of claim 1, wherein: Said preformed wear-resistant layer is selected from one of PET, PETG, ASA, PC, PMMA, or a mixed resin formed of any of these resins.

4. The method of claim 1, wherein: The base resin of said foamed core (11) and thermoplastic shell (13) is polyolefin / polyvinyl chloride.

5. The method of claim 1, wherein: Said layered reinforcement (12) is formed by impregnating a reinforcing fiber mesh with a thermosetting resin.

6. A method for manufacturing a reinforced laminated floor, said reinforced laminated floor comprising - a substrate (1) comprising a foamed core (11) formed of foamed plastic, a thermoplastic shell (13) covering said foamed core, and a layered reinforcement (12) disposed between said foamed core (11) and thermoplastic shell (13); - a decorative layer (2) covering said substrate; - a preformed wear-resistant layer (3) covering said decorative layer, serving as a protective layer; - a first adhesive layer (201) disposed between said decorative layer and said preformed wear-resistant layer, having repeating urethane segments; said decorative layer (2) comprising a preformed carrier film (21') and a pattern layer (22) disposed based on said preformed carrier film, said preformed carrier film being connected to said substrate (1) through a second adhesive layer (202); characterized in that said method comprising the following steps: S1. providing a substrate (1) and a preformed wear-resistant layer (3); S2. applying a cleaning agent to the surface of said substrate (1) for treating the lubricating wax on the surface of the substrate, followed by corona treatment; S3. providing a preformed carrier film (21'), and corona treating both sides of said carrier film to control the dacy value to be above 46; S4. applying said first adhesive layer (201) to said decorative layer (2) or to the back surface of the wear-resistant layer (3), and then hot-pressing said substrate (1) and wear-resistant layer (3) together; S5. placing for more than 36 hours. S4, printing a pattern on the carrier film by using an industrial printer to form a decorative layer (2); S5, applying a second adhesive layer (202) on the substrate (1) or on the back surface of the decorative layer (2), and then hot-pressing the decorative layer (2) and the substrate (1) together; S6, placing for more than 16 hours; S7, performing corona treatment on the pre-prepared wear-resistant layer (3), and controlling the dynes value to be more than 50; S8, applying a first adhesive layer (201) on the decorative layer (2) or on the back surface of the wear-resistant layer (3), and then hot-pressing the substrate (1) and the wear-resistant layer (3) together; S9, placing for more than 36 hours.

7. The method of claim 6, wherein: The cleaning agent is dichloromethane.

8. The method of claim 6, wherein: The pre-prepared wear-resistant layer is selected from one of PET, PETG, ASA, PC, PMMA, or a mixed resin formed by any of these resins.

9. The method of claim 6, wherein: The base resin of the foamed core (11) and the thermoplastic shell (13) is polyolefin / polyvinyl chloride.

10. The method of claim 6, wherein: The layered reinforcement (12) is formed by impregnating a reinforced fiber mesh with a thermosetting resin.

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