A high-strength PVC flooring and its preparation method

Abstract

This invention relates to the field of flooring technology, and proposes a high-strength PVC flooring and its preparation method. The high-strength PVC flooring comprises the following components by weight: 100 parts PVC, 10-15 parts ethylene-vinyl acetate copolymer, 5-8 parts stabilizer, 3-5 parts compatibilizer, and 30-40 parts composite filler; the composite filler comprises the following components by weight: 30-40 parts calcium carbonate, 10-20 parts wollastonite, 5-9 parts polyethylene glycol, and 2-7 parts polybutylene succinate. This technical solution solves the problem of relatively poor wear resistance in related technologies for PVC flooring.

Description

Technical Field

[0001] This invention relates to the field of flooring technology, specifically to a high-strength PVC floor and its preparation method. Background Technology

[0002] PVC flooring, with its advantages of being waterproof and moisture-proof, easy to install, and available in a wide variety of colors and patterns, has been widely used in home decoration, commercial offices, educational and medical facilities, sports venues, and other scenarios, becoming an important category of modern floor decoration materials. Currently, most PVC flooring on the market uses polyvinyl chloride (PVC) as the base material, combined with conventional inorganic fillers such as calcium carbonate and talc, as well as additives such as plasticizers, stabilizers, and lubricants. It is formed through processes such as mixing, extrusion, and calendering, possessing characteristics such as low cost and good processing performance, and can meet the basic usage needs of ordinary residential and commercial scenarios.

[0003] However, as application scenarios continue to expand, people have increasingly higher performance requirements for PVC flooring, especially in terms of strength and abrasion resistance. Existing products are struggling to adapt to environments with high foot traffic, high loads, and high friction. To improve the mechanical properties and dimensional stability of PVC flooring, the addition of inorganic fillers (such as calcium carbonate) is commonly used. However, inorganic fillers have poor compatibility with the PVC matrix, easily leading to filler agglomeration, which not only affects mechanical properties but also limits the improvement of abrasion resistance. Summary of the Invention

[0004] This invention proposes a high-strength PVC flooring and its preparation method, which solves the problem of relatively poor wear resistance of PVC flooring in related technologies.

[0005] The technical solution of the present invention is as follows: This invention proposes a high-strength PVC flooring, the raw materials of which include the following components in parts by weight: 100 parts PVC, 10-15 parts ethylene-vinyl acetate copolymer, 5-8 parts stabilizer, 3-5 parts compatibilizer, and 30-40 parts composite filler; The raw materials for the composite filler include the following components in parts by weight: Calcium carbonate 30-40 parts, wollastonite 10-20 parts, polyethylene glycol 5-9 parts, polybutylene succinate 2-7 parts.

[0006] As a further technical solution, the weight ratio of the polyethylene glycol to the polybutylene succinate is 1~2:1.

[0007] In this invention, by optimizing the ratio of polyethylene glycol (PEG) to polybutylene succinate (PBS), when the weight ratio of PEG to PBS is 1~2:1, the wear resistance of PVC flooring can be further improved, reducing its volume loss to 1.0 mm. 3 the following.

[0008] As a further technical solution, the average particle size of the calcium carbonate is 10~30μm, and the average particle size of the wollastonite is 50~100nm.

[0009] As a further technical solution, the preparation method of the composite filler includes the following steps: The calcium carbonate and wollastonite were blended and ball-milled to obtain a mixture; the silane coupling agent was dissolved in ethanol, added to the mixture, mixed, and dried to obtain a pretreated mixture; the polyethylene glycol and polybutylene succinate were dispersed in chloroform, added to the pretreated mixture, mixed, and dried to obtain a composite filler.

[0010] As a further technical solution, the silane coupling agent includes one or more of γ-aminopropyltriethoxysilane, γ-aminopropylmethyldiethoxysilane, and γ-glycidoxypropyltrimethoxysilane, preferably γ-aminopropyltriethoxysilane.

[0011] As a further technical solution, the amount of the silane coupling agent added is 5% to 8% of the weight of the mixture.

[0012] As a further technical solution, during ball milling, the ball milling speed is 300~400 rpm and the ball milling time is 10~20 min.

[0013] As a further technical solution, the raw materials for the composite filler also include 2 to 4 parts of methyl methacrylate-butadiene-styrene copolymer.

[0014] In this invention, methyl methacrylate-butadiene-styrene copolymer is used in combination with polyethylene glycol and polybutylene succinate to jointly treat calcium carbonate and wollastonite. This improves the mechanical properties of PVC flooring without affecting its wear resistance. The reason for this is likely that the addition of methyl methacrylate-butadiene-styrene copolymer, acting in conjunction with polyethylene glycol and polybutylene succinate, can improve the interfacial bonding between the PVC matrix and calcium carbonate and wollastonite to a certain extent, resulting in a PVC flooring with a stable internal structure. When subjected to external forces, the addition of methyl methacrylate-butadiene-styrene copolymer can also effectively prevent the generation and propagation of cracks, thereby improving the mechanical properties of the PVC flooring and increasing its tensile strength to 16.7 MPa.

[0015] As a further technical solution, the preparation method of the composite filler includes the following steps: The calcium carbonate and wollastonite were blended and ball-milled to obtain a mixture; the silane coupling agent was dissolved in ethanol, added to the mixture, mixed, and dried to obtain a pretreated mixture; the polyethylene glycol, polybutylene succinate, and methyl methacrylate-butadiene-styrene copolymer were dispersed in chloroform, added to the pretreated mixture, mixed, and dried to obtain a composite filler.

[0016] As a further technical solution, the raw materials of the PVC flooring also include 15-20 parts of plasticizer, 2-4 parts of lubricant, and 1-3 parts of antioxidant.

[0017] As a further technical solution, the stabilizer includes a calcium-zinc stabilizer; The compatibilizer includes EVA-g-MAH.

[0018] As a further technical solution, the plasticizer includes one or two of diisononyl phthalate and dioctyl terephthalate, preferably diisononyl phthalate; The lubricant includes one or two of stearic acid and polyethylene wax, preferably stearic acid; The antioxidant includes one or more of antioxidant 1010, antioxidant 1098, and antioxidant 1076, preferably antioxidant 1010.

[0019] This invention proposes a method for preparing high-strength PVC flooring, which includes the following steps: blending PVC flooring raw materials, extruding and molding them to obtain the high-strength PVC flooring.

[0020] The working principle and beneficial effects of this invention are as follows: In this invention, calcium carbonate and wollastonite are combined with polyethylene glycol and polybutylene succinate to form a composite filler. Adding this filler to PVC flooring improves its wear resistance. Specifically, the use of polyethylene glycol and polybutylene succinate to composite-treat calcium carbonate and wollastonite reduces the friction between the calcium carbonate and wollastonite themselves, while also allowing them to be more evenly distributed within the PVC matrix. This results in better resistance to frictional stress and improved wear resistance of the PVC flooring. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] In the following embodiments and comparative examples: The PVC model number is SG-5; The model number of the ethylene-vinyl acetate copolymer is EVA 1520; The calcium-zinc stabilizer is model CZ-9503; The model number of EVA-g-MAH is C250; The average particle size of calcium carbonate is 20 μm; The average particle size of wollastonite is 60 nm; The polyethylene glycol is designated as PEG 600. The polybutylene succinate is designated as FZ71. The model number of the methyl methacrylate-butadiene-styrene copolymer is M-732; The model number of the ethylene-methyl methacrylate copolymer is SWA130.

[0023] Example 1 The preparation method of composite filler includes the following steps: A1. Mix 30 parts calcium carbonate and 20 parts wollastonite, and ball mill at 350 rpm for 15 min to obtain a mixture; A2. Dissolve 2.5 parts of γ-aminopropyltriethoxysilane in 80 parts of 80% ethanol, add the above mixture, mix, and dry to obtain a pretreated mixture; A3. Disperse 9 parts of polyethylene glycol and 2 parts of polybutylene succinate in 80 parts of chloroform at 45°C, add the above pretreated mixture, mix, and dry to obtain the composite filler; A high-strength PVC flooring, comprising the following steps: First, 100 parts of PVC, 13 parts of ethylene-vinyl acetate copolymer, 5 parts of calcium-zinc stabilizer, 3 parts of EVA-g-MAH, and 15 parts of diisononyl phthalate are blended together. Then, 30 parts of composite filler, 2 parts of stearic acid, and 1 part of antioxidant 1010 are added and blended together. The mixture is then extruded to obtain high-strength PVC flooring.

[0024] Example 2 The preparation method of composite filler includes the following steps: A1. Mix 40 parts calcium carbonate and 10 parts wollastonite, and ball mill at 400 rpm for 10 min to obtain a mixture; A2. Dissolve 4 parts of γ-aminopropyltriethoxysilane in 80 parts of 80% ethanol, add the above mixture, mix, and dry to obtain a pretreated mixture; A3. Disperse 5 parts of polyethylene glycol and 7 parts of polybutylene succinate in 80 parts of chloroform at 45°C, add the above pretreated mixture, mix, and dry to obtain the composite filler; A high-strength PVC flooring, comprising the following steps: First, 100 parts of PVC, 15 parts of ethylene-vinyl acetate copolymer, 8 parts of calcium-zinc stabilizer, 5 parts of EVA-g-MAH, and 20 parts of diisononyl phthalate are blended together. Then, 40 parts of composite filler, 4 parts of stearic acid, and 3 parts of antioxidant 1010 are added and blended together. The mixture is then extruded to obtain high-strength PVC flooring.

[0025] Example 3 In the preparation method of the composite filler in this embodiment, 9 parts of polyethylene glycol and 3 parts of polybutylene succinate are added. The remaining steps in the composite filler preparation method and the preparation steps of the high-strength PVC flooring are the same as in Example 2.

[0026] Example 4 In the preparation method of the composite filler in this embodiment, 6 parts of polyethylene glycol and 6 parts of polybutylene succinate are added. The remaining steps in the composite filler preparation method and the preparation steps of the high-strength PVC flooring are the same as in Example 2.

[0027] Example 5 In the preparation method of the composite filler in this embodiment, 8 parts of polyethylene glycol and 4 parts of polybutylene succinate are added. The remaining steps in the composite filler preparation method and the preparation steps of the high-strength PVC flooring are the same as in Example 2.

[0028] Example 6 The preparation method of composite filler includes the following steps: A1. Mix 40 parts calcium carbonate and 10 parts wollastonite, and ball mill at 400 rpm for 10 min to obtain a mixture; A2. Dissolve 4 parts of γ-aminopropyltriethoxysilane in 80 parts of 80% ethanol, add the above mixture, mix, and dry to obtain a pretreated mixture; A3. Disperse 6 parts of polyethylene glycol, 6 parts of polybutylene succinate and 2 parts of methyl methacrylate-butadiene-styrene copolymer in 80 parts of chloroform at 45°C, add the above pretreated mixture, mix and dry to obtain the composite filler; The preparation steps for high-strength PVC flooring are the same as in Example 4.

[0029] Example 7 The preparation method of composite filler includes the following steps: A1. Mix 40 parts calcium carbonate and 10 parts wollastonite, and ball mill at 400 rpm for 10 min to obtain a mixture; A2. Dissolve 4 parts of γ-aminopropyltriethoxysilane in 80 parts of 80% ethanol, add the above mixture, mix, and dry to obtain a pretreated mixture; A3. Disperse 6 parts of polyethylene glycol, 6 parts of polybutylene succinate and 3 parts of methyl methacrylate-butadiene-styrene copolymer in 80 parts of chloroform at 45°C, add the above pretreated mixture, mix and dry to obtain the composite filler; The preparation steps for high-strength PVC flooring are the same as in Example 4.

[0030] Example 8 The preparation method of composite filler includes the following steps: A1. Mix 40 parts calcium carbonate and 10 parts wollastonite, and ball mill at 400 rpm for 10 min to obtain a mixture; A2. Dissolve 4 parts of γ-aminopropyltriethoxysilane in 80 parts of 80% ethanol, add the above mixture, mix, and dry to obtain a pretreated mixture; A3. Disperse 6 parts of polyethylene glycol, 6 parts of polybutylene succinate and 4 parts of methyl methacrylate-butadiene-styrene copolymer in 80 parts of chloroform at 45°C, add the above pretreated mixture, mix and dry to obtain composite filler; The preparation steps for high-strength PVC flooring are the same as in Example 4.

[0031] Example 9 The preparation method of composite filler includes the following steps: A1. Mix 40 parts calcium carbonate and 10 parts wollastonite, and ball mill at 400 rpm for 10 min to obtain a mixture; A2. Dissolve 4 parts of γ-aminopropyltriethoxysilane in 80 parts of 80% ethanol, add the above mixture, mix, and dry to obtain a pretreated mixture; A3. Disperse 6 parts of polyethylene glycol, 6 parts of polybutylene succinate, and 4 parts of ethylene-methyl methacrylate copolymer in 80 parts of chloroform at 45°C, add the above pretreated mixture, mix, and dry to obtain the composite filler; The preparation steps for high-strength PVC flooring are the same as in Example 4.

[0032] Comparative Example 1 The preparation method of composite filler includes the following steps: A1. Mix 40 parts calcium carbonate and 10 parts wollastonite, and ball mill at 400 rpm for 10 min to obtain a mixture; A2. Dissolve 4 parts of γ-aminopropyltriethoxysilane in 80 parts of 80% ethanol, add the above mixture, mix, and dry to obtain a pretreated mixture; A3. Disperse 5 parts of polyethylene glycol and 7 parts of methyl methacrylate-butadiene-styrene copolymer in 80 parts of chloroform at 45°C, add the above pretreated mixture, mix, and dry to obtain the composite filler; The remaining steps in the composite filler preparation method and the preparation steps of the high-strength PVC flooring are the same as in Example 2.

[0033] Comparative Example 2 The preparation method of composite filler includes the following steps: A1. Mix 40 parts calcium carbonate and 10 parts wollastonite, and ball mill at 400 rpm for 10 min to obtain a mixture; A2. Dissolve 4 parts of γ-aminopropyltriethoxysilane in 80 parts of 80% ethanol, add the above mixture, mix, and dry to obtain a pretreated mixture; A3. Disperse 5 parts of methyl methacrylate-butadiene-styrene copolymer and 7 parts of polybutylene succinate in 80 parts of chloroform at 45°C, add the above pretreated mixture, mix, and dry to obtain the composite filler; The remaining steps in the composite filler preparation method and the preparation steps of the high-strength PVC flooring are the same as in Example 2.

[0034] Comparative Example 3 The preparation method of composite filler includes the following steps: A1. Mix 40 parts calcium carbonate and 10 parts wollastonite, and ball mill at 400 rpm for 10 min to obtain a mixture; A2. Dissolve 4 parts of γ-aminopropyltriethoxysilane in 80 parts of 80% ethanol, add the above mixture, mix, and dry to obtain a pretreated mixture; A3. Disperse 12 parts of methyl methacrylate-butadiene-styrene copolymer in 80 parts of chloroform at 45°C, add the above pretreated mixture, mix, and dry to obtain the composite filler; The remaining steps in the composite filler preparation method and the preparation steps of the high-strength PVC flooring are the same as in Example 2.

[0035] Experimental Example The PVC flooring samples prepared in Examples 1-9 and Comparative Examples 1-3 were subjected to the following performance tests: (1) The abrasion resistance was tested according to the method in GB / T 4085-2015 "Semi-rigid PVC block flooring"; (2) The tensile strength was tested according to the method in GB / T 1040.1-2025 "Determination of tensile properties of plastics - Part 1: General Rules", wherein the test speed was 5 mm / min. The test results are shown in Table 1.

[0036] Table 1 Performance test results of Examples 1-9 and Comparative Examples 1-3

[0037] Compared with Comparative Examples 1-3, the PVC flooring prepared in Examples 1-9 showed reduced volumetric wear, indicating that the use of polyethylene glycol and polybutylene succinate in combination with wollastonite and calcium carbonate to form a composite filler, when added to PVC flooring, can effectively improve the wear resistance of PVC flooring, reducing its volumetric wear to 1.5 mm. 3 the following.

[0038] Compared with Examples 4 and 9, the tensile strength of the PVC flooring prepared in Examples 6-8 is improved. This indicates that after adding methyl methacrylate-butadiene-styrene copolymer to the composite filler, it works together with polyethylene glycol and polybutylene succinate to act on wollastonite and calcium carbonate. This can improve the mechanical properties of the PVC flooring without affecting its wear resistance, and increase its tensile strength to over 16.7 MPa.

[0039] The above are merely 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 within the protection scope of the present invention.

Claims

1. A high-strength PVC flooring, characterized in that, The raw materials consist of the following components in parts by weight: 100 parts PVC, 10-15 parts ethylene-vinyl acetate copolymer, 5-8 parts stabilizer, 3-5 parts compatibilizer, and 30-40 parts composite filler; The raw materials for the composite filler include the following components in parts by weight: Calcium carbonate 30-40 parts, wollastonite 10-20 parts, polyethylene glycol 5-9 parts, polybutylene succinate 2-7 parts.

2. The high-strength PVC flooring according to claim 1, characterized in that, The weight ratio of polyethylene glycol to polybutylene succinate is 1~2:

1.

3. The high-strength PVC flooring according to claim 1, characterized in that, The average particle size of the calcium carbonate is 10~30μm, and the average particle size of the wollastonite is 50~100nm.

4. The high-strength PVC flooring according to claim 1, characterized in that, The method for preparing the composite filler includes the following steps: The calcium carbonate and wollastonite were blended and ball-milled to obtain a mixture; the silane coupling agent was dissolved in ethanol, added to the mixture, mixed, and dried to obtain a pretreated mixture; the polyethylene glycol and polybutylene succinate were dispersed in chloroform, added to the pretreated mixture, mixed, and dried to obtain a composite filler.

5. A high-strength PVC flooring according to claim 1, characterized in that, The raw materials for the composite filler also include 2 to 4 parts of methyl methacrylate-butadiene-styrene copolymer.

6. A high-strength PVC flooring according to claim 5, characterized in that, The method for preparing the composite filler includes the following steps: The calcium carbonate and wollastonite were blended and ball-milled to obtain a mixture; the silane coupling agent was dissolved in ethanol, added to the mixture, mixed, and dried to obtain a pretreated mixture; the polyethylene glycol, polybutylene succinate, and methyl methacrylate-butadiene-styrene copolymer were dispersed in chloroform, added to the pretreated mixture, mixed, and dried to obtain a composite filler.

7. A high-strength PVC flooring according to claim 1, characterized in that, The raw materials of the PVC flooring also include 15-20 parts of plasticizer, 2-4 parts of lubricant, and 1-3 parts of antioxidant.

8. A high-strength PVC flooring according to claim 1, characterized in that, The stabilizer includes a calcium-zinc stabilizer; The compatibilizer includes EVA-g-MAH.

9. A high-strength PVC flooring according to claim 7, characterized in that, The plasticizer includes one or both of diisononyl phthalate and dioctyl terephthalate; The lubricant includes one or both of stearic acid and polyethylene wax; The antioxidants include one or more of antioxidants 1010, antioxidant 1098, and antioxidant 1076.

10. A method for preparing high-strength PVC flooring, used to prepare a high-strength PVC flooring as described in any one of claims 1 to 9, characterized in that, The process includes the following steps: blending the raw materials for PVC flooring, extruding them, and obtaining the high-strength PVC flooring.

Images