High-wear-resistance homogeneous transparent core PVC floor and preparation method thereof

Abstract

The invention relates to the technical field of PVC materials, and provides a high-wear-resistance homogeneous core-penetrating PVC floor and a preparation method thereof.The high-wear-resistance homogeneous core-penetrating PVC floor is prepared from, by weight, 100 parts of PVC resin, 15-20 parts of silicon dioxide, 15-20 parts of flame retardant, 10-14 parts of plasticizer, 1-1.5 parts of lubricant and 3-5 parts of stabilizer; the silicon dioxide is composed of first silicon dioxide and second silicon dioxide, and the first silicon dioxide and the second silicon dioxide are different in particle size. According to the technical scheme, the problem that the wear resistance of the homogeneous transparent core PVC floor is poor in the related technology is solved.

Description

Technical Field

[0001] The invention relates to the technical field of PVC materials, and in particular to a highly wear-resistant homogeneous core-penetrating PVC floor and a preparation method thereof. Background Art

[0002] In the building decoration materials market, flooring is an important part of indoor space, and its performance and quality directly affect the user experience and the service life of the space. PVC flooring is widely used in both commercial and civil fields due to its waterproof, moisture-proof and easy installation characteristics. Among them, homogeneous core-permeable PVC flooring has certain advantages in wear resistance and stain resistance due to its uniform material, and is deeply favored by the market.

[0003] However, with the continuous development of the construction industry, various places have increasingly stringent requirements for floor performance. In commercial places, such as shopping malls and supermarkets, where the flow of people is extremely large and shopping carts often pass by frequently, and transportation hubs such as airports and stations carry a large number of passengers' footsteps and luggage dragging every day, the problem of insufficient wear resistance of traditional homogeneous core-permeable PVC flooring has gradually become prominent. After a period of use, the surface of the floor is prone to obvious wear and scratches, which not only seriously affects the appearance and reduces the overall grade of the space, but also greatly shortens the service life of the floor and increases the cost of maintenance and replacement.

[0004] Common homogeneous core-penetrating PVC floors are mainly prepared by adding common wear-resistant fillers or using conventional production processes. However, the wear resistance of the floors obtained by these methods is limited and it is difficult to meet the requirements of high wear resistance. Therefore, it is necessary to provide a highly wear-resistant homogeneous core-penetrating PVC floor. Summary of the invention

[0005] The invention provides a highly wear-resistant homogeneous core-penetrating PVC floor and a preparation method thereof, which solves the problem of poor wear resistance of the homogeneous core-penetrating PVC floor in the related art.

[0006] The technical solution of the present invention is as follows: The invention provides a highly wear-resistant homogeneous core-penetrating PVC floor, comprising the following raw materials in parts by weight: 100 parts of PVC resin, 15-20 parts of silicon dioxide, 15-20 parts of flame retardant, 10-14 parts of plasticizer, 1-1.5 parts of lubricant, and 3-5 parts of stabilizer; the silicon dioxide consists of a first silicon dioxide and a second silicon dioxide, and the particle sizes of the first silicon dioxide and the second silicon dioxide are different.

[0007] As a further technical solution, the particle size of the first silicon dioxide is 100 nm, and the particle size of the second silicon dioxide is 500 nm.

[0008] In the present invention, the silicon dioxide is composed of silicon dioxide with a particle size of 100 nm and silicon dioxide with a particle size of 500 nm, which can better withstand the force of the PVC floor during friction, and the wear during the friction process is more uniform, further improving the wear resistance.

[0009] As a further technical solution, the mass ratio of the first silicon dioxide to the second silicon dioxide is 5~7:1.

[0010] As a further technical solution, the plasticizer consists of ethylene-vinyl acetate copolymer, acryl polyether and epoxy compound.

[0011] In the present invention, the addition of ethylene-vinyl acetate copolymer, acryl polyether and epoxy compound can provide better processing performance of PVC sheet, make PVC sheet easier to form, and the addition of the three can further improve the toughness of PVC sheet, expand the application scenarios of PVC sheet, and further extend the service life of PVC sheet. Although the addition of silicon dioxide can improve the wear resistance, it will lead to a decrease in the static bending strength of PVC floor. The addition of plasticizer in the present invention can also improve the static bending strength of PVC floor.

[0012] As a further technical solution, the mass ratio of the ethylene-vinyl acetate copolymer, the acryl polyether, and the epoxy ether-based compound is 10:2-3:1.

[0013] As a further technical solution, the epoxy ether compound is glycidyl 2-methoxyphenyl ether.

[0014] As a further technical solution, the acryl polyether includes one or more of APEG-400, APEG-700, and APEG-800.

[0015] As a further technical solution, the flame retardant includes one or more of magnesium hydroxide, aluminum hydroxide, antimony trioxide, and zinc borate.

[0016] As a further technical solution, the flame retardant consists of magnesium hydroxide and aluminum hydroxide.

[0017] In the present invention, the composite use of magnesium hydroxide and aluminum hydroxide can synergistically enhance the flame retardant effect. Magnesium hydroxide and aluminum hydroxide produce water vapor and metal oxides when thermally decomposed, which can reduce the release of harmful gases. Compared with some halogen-containing flame retardants, magnesium hydroxide and aluminum hydroxide are safer and more environmentally friendly. In addition, magnesium hydroxide and aluminum hydroxide also have good stability and reinforcement effects, and can improve the wear resistance of PVC floors.

[0018] As a further technical solution, the lubricant includes one or more of epoxidized soybean oil, stearic acid, and paraffin.

[0019] As a further technical solution, the lubricant consists of stearic acid and paraffin.

[0020] In the present invention, stearic acid and paraffin are both relatively common lubricants with relatively low prices. The compounding of these two lubricants can reduce the surface defects of the PVC floor, such as pitting, scratches, etc., and improve the appearance quality and static bending strength of the product.

[0021] As a further technical solution, the stabilizer is a calcium zinc stabilizer.

[0022] In the present invention, thermal stability is a key factor affecting the PVC floor during processing and use, and the calcium zinc stabilizer is an environmentally friendly stabilizer that can effectively inhibit the thermal degradation process of the PVC floor during processing and use, thereby improving the stability of the PVC floor.

[0023] The invention also proposes a method for preparing a highly wear-resistant homogeneous core-penetrating PVC floor, comprising the following steps: mixing the raw materials of the components in parts by weight, kneading, extruding and molding to obtain the homogeneous core-penetrating PVC floor.

[0024] The working principle and beneficial effects of the present invention are: In the present invention, the homogeneous core-penetrating PVC floor is added with silicon dioxide as a filler on the basis of PVC resin, which can improve the wear resistance of the PVC floor. The silicon dioxide is composed of two silicon dioxides with different particle sizes, which can make the PVC form a tighter structure and further improve the wear resistance of the PVC floor. The addition of plasticizer can make the PVC floor less likely to crack and break during the friction process, and further improve the wear resistance. The addition of stabilizer can maintain the stability of the PVC molecular structure, can better adapt to external forces, and help improve the wear resistance of the PVC floor. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the following embodiments and comparative examples: PVC resin: SH-160 Shanghai Chlor-Alkali Chemical Co., Ltd. First silicon dioxide: particle size 100nm, purity 99.9%; Second silicon dioxide: particle size 500nm, purity 99.9%; Magnesium hydroxide: 325 mesh; Aluminum hydroxide: 325 mesh; Calcium zinc stabilizer: Model CJ-778, Foshan Chancheng District Changjiang Plastic Additive Co., Ltd.; Ethylene-vinyl acetate copolymer: Model 007SS, DuPont, USA.

[0027] Example 1 A method for preparing a highly wear-resistant homogeneous core-penetrating PVC floor comprises the following steps: 100 parts of PVC resin, 15 parts of silica (composed of the first silica and the second silica in a mass ratio of 5:1), 7.5 parts of magnesium hydroxide, 7.5 parts of aluminum hydroxide, 10 parts of plasticizer (the plasticizer is ethylene-vinyl acetate copolymer), 0.5 parts of stearic acid, 0.5 parts of 58# paraffin, and 3 parts of calcium zinc stabilizer are mixed, kneaded for 40 minutes, extruded, and molded to obtain a homogeneous core-permeable PVC floor.

[0028] Example 2 A method for preparing a highly wear-resistant homogeneous core-penetrating PVC floor comprises the following steps: 100 parts of PVC resin, 20 parts of silica (composed of the first silica and the second silica in a mass ratio of 7:1), 10 parts of magnesium hydroxide, 10 parts of aluminum hydroxide, 14 parts of plasticizer (the plasticizer is ethylene-vinyl acetate copolymer), 0.75 parts of stearic acid, 0.75 parts of 58# paraffin wax, and 5 parts of calcium zinc stabilizer are mixed, kneaded for 40 minutes, extruded, and molded to obtain a homogeneous core-permeable PVC floor.

[0029] Example 3 Compared with Example 1, the difference of this example is that the silicon dioxide is composed of the first silicon dioxide and the second silicon dioxide in a mass ratio of 1:5.

[0030] Example 4 A method for preparing a highly wear-resistant homogeneous core-penetrating PVC floor comprises the following steps: 100 parts of PVC resin, 2.5 parts of second silica, 7.5 parts of magnesium hydroxide, 7.5 parts of aluminum hydroxide, 10 parts of ethylene-vinyl acetate copolymer, 0.5 parts of stearic acid, 0.5 parts of 58# paraffin wax and 3 parts of calcium zinc stabilizer were mixed, and 12.5 parts of first silica were added after mixing for 30 minutes. After mixing for 10 minutes again, the mixture was extruded and formed to obtain a homogeneous core-permeable PVC floor.

[0031] Example 5 A method for preparing a highly wear-resistant homogeneous core-penetrating PVC floor comprises the following steps: 100 parts of PVC resin, 12.5 parts of first silica, 7.5 parts of magnesium hydroxide, 7.5 parts of aluminum hydroxide, 10 parts of ethylene-vinyl acetate copolymer, 0.5 parts of stearic acid, 0.5 parts of 58# paraffin wax and 3 parts of calcium zinc stabilizer were mixed, and 2.5 parts of second silica were added after mixing for 30 minutes. After mixing for 10 minutes again, the mixture was extruded and formed to obtain a homogeneous core-permeable PVC floor.

[0032] Example 6 Compared with Example 5, the difference of this example is that the plasticizer consists of ethylene-vinyl acetate copolymer and APEG-400 in a mass ratio of 10:2.

[0033] Example 7 Compared with Example 5, the difference of this example is that the plasticizer consists of ethylene-vinyl acetate copolymer, APEG-400, and glycidyl 2-methoxyphenyl ether in a mass ratio of 10:2:1.

[0034] Example 8 Compared with Example 5, the difference of this example is that the plasticizer consists of ethylene-vinyl acetate copolymer, APEG-400, APEG-700, and glycidyl 2-methoxyphenyl ether in a mass ratio of 10:1:1:1.

[0035] Example 9 Compared with Example 8, the difference of this example is that glycidyl 2-methoxyphenyl ether is replaced by γ-(2,3-glycidoxy)propyltrimethoxysilane.

[0036] Comparative Example 1 Compared with Example 1, the difference of this comparative example is that the second silicon dioxide is replaced by an equal amount of the first silicon dioxide.

[0037] Comparative Example 2 Compared with Example 1, the difference of this comparative example is that the first silicon dioxide is replaced by an equal amount of the second silicon dioxide.

[0038] Experimental Example 1 The wear resistance grade was determined according to the determination method in GB / T 34440-2017 “Hard Polyvinyl Chloride Flooring”. The test results are shown in Table 1.

[0039] Table 1

[0040] The wear resistance levels of Examples 1 to 5 of the present invention are all higher than those of Comparative Examples 1 to 2, indicating that the PVC floor of the present invention has high wear resistance, and the wear resistance levels of the PVC bottom plates in Examples 6 to 9 of the present invention are all T-level.

[0041] Experimental Example 2 Static bending strength: Prepare the specimen and measure the transverse static bending strength according to the three-point bending method in GB / T 17657-2022 "Test methods for physical and chemical properties of wood-based panels and veneer wood-based panels". The specimen size requirements are: length l 2≥(20t+50)mm, t is the basic thickness of the specimen, and 150mm≤ l 2≤1050mm, width b=(50±1)mm, the measurement results are shown in Table 2.

[0042] Table 2

[0043] It can be seen from Table 2 that the static bending strength (transverse) of the PVC floor prepared by the present invention can reach 22.3-27.6 MPa, and has a relatively high static bending strength (transverse).

[0044] Experimental Example 3 (1) According to EN 1350.1-1:2018 Classification of building materials and products according to combustion performance - Part 1: Classification according to combustion performance, the combustion grade of the PVC floor in Example 1 was determined; (2) Determine the residual depression of the PVC baseboard in Example 1 according to the determination method and requirements in Table 2 of ISO 10581-2019 and ISO 24343-1:2007; The above measurement results are shown in Table 3.

[0045] Table 3

[0046] It can be seen from Table 3 that the PVC floor prepared by the present invention has higher performance.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A highly wear-resistant homogeneous core-penetrating PVC floor, characterized in that: The raw materials include the following components in parts by weight: 100 parts of PVC resin, 15 to 20 parts of silicon dioxide, 15 to 20 parts of flame retardant, 10 to 14 parts of plasticizer, 1 to 1.5 parts of lubricant, and 3 to 5 parts of stabilizer; the silicon dioxide consists of a first silicon dioxide and a second silicon dioxide, and the particle sizes of the first silicon dioxide and the second silicon dioxide are different.

2. A highly wear-resistant homogeneous core-penetrating PVC floor according to claim 1, characterized in that: The particle size of the first silicon dioxide is 100 nm, and the particle size of the second silicon dioxide is 500 nm.

3. A highly wear-resistant homogeneous core-penetrating PVC floor according to claim 1, characterized in that: The mass ratio of the first silicon dioxide to the second silicon dioxide is 5-7:

1.

4. A highly wear-resistant homogeneous core-penetrating PVC floor according to claim 1, characterized in that: The plasticizer consists of ethylene-vinyl acetate copolymer, acryl alcohol polyether and epoxy ether compounds.

5. A highly wear-resistant homogeneous core-penetrating PVC floor according to claim 4, characterized in that: The mass ratio of the ethylene-vinyl acetate copolymer, the acryl polyether and the epoxy ether compound is 10:2-3:

1.

6. A highly wear-resistant homogeneous core-penetrating PVC floor according to claim 1, characterized in that: The flame retardant includes one or more of magnesium hydroxide, aluminum hydroxide, antimony trioxide, and zinc borate.

7. A highly wear-resistant homogeneous core-penetrating PVC floor according to claim 6, characterized in that: The flame retardant consists of magnesium hydroxide and aluminum hydroxide.

8. The highly wear-resistant homogeneous core-penetrating PVC floor according to claim 1, characterized in that: The lubricant includes one or more of epoxidized soybean oil, stearic acid, and paraffin.

9. The highly wear-resistant homogeneous core-penetrating PVC floor according to claim 1, characterized in that: The stabilizer is a calcium zinc stabilizer.

10. The method for preparing a highly wear-resistant homogeneous core-penetrating PVC floor according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: mixing the raw materials of the components in parts by weight, and performing mixing, extrusion and molding to obtain a homogeneous core-permeable PVC floor.

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