Ground material for ground of ground throw field and preparation method of ground material

Abstract

The invention belongs to the technical field of court ground materials, and particularly relates to a ground material of a ground throw court and a preparation method thereof. The ground material of the ground throwing field comprises the anti-skid surface layer, the elastic buffer layer and the sound insulation layer from top to bottom, and has excellent sound insulation, impact resistance and wear resistance. The polyvinyl butyral bonded acrylic sound insulation felt and the jute fiber board are used as a sound insulation felt composite material to be laid on the surface of the base layer, so that the sound insulation effect of the ground of the ground throwing field is enhanced, boric acid and phenylboronic acid are compounded to react with siloxane, and reinforced gel prepared by adding a reinforcing material has excellent shear hardening and thermal stability, so that the sound insulation effect of the ground of the ground throwing field is improved. An elastic reinforcing material is prepared by compounding alkali-treated straw fibers and a reinforcing body prepared by compounding the alkali-treated straw fibers and a hydrophobically modified sponge framework, and has remarkable creep resistance and excellent impact hardenability, and the esterified straw fibers prepared by reacting the alkali-treated straw fibers with citric acid are used as a toughening agent to be added into wear-resistant elastic microspheres prepared by rubber, so that the wear-resistant performance of the wear-resistant elastic microspheres is greatly improved. The material has excellent wear resistance, light weight and aging resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of court ground materials, and in particular relates to a bocce ball court ground material and a preparation method thereof. Background Art

[0002] Bocce ball includes six forms: lawn bocce ball, marbles, plastic bocce ball, metal bocce ball, small metal bocce ball, and table bocce ball. Plastic bocce ball is the first bocce ball project to enter my country. It has simple rules and less field restrictions, and has a wide audience area. Bocce is a sports competition that combines skills, strength and endurance. It has very high requirements for the venue. The venue requires low elasticity, high flatness and high friction coefficient. Therefore, sandy land and grass are commonly used materials for the ground of bocce courts. However, there are many limitations in existing bocce courts. For example, sandy land bocce courts are easily affected by weather. On rainy days, the venue will become muddy, affecting the bocce game and requiring regular cleaning.

[0003] The Chinese invention patent with publication number CN109575719B discloses a wear-resistant and non-slip silicone PU elastic court, which includes an elastic layer, a reinforcement layer and a surface layer from bottom to top; the surface layer is composed of component A and component B, which are calculated by weight as follows: component A is: silicone-modified acrylic resin, water-based amino resin, organic montmorillonite, nano-silica, polytetrafluoroethylene, p-tert-butylphenyl glycidyl ether, polyethylene glycol, organic modified polysiloxane, BYK-370 and color paste; component B is: fatty amine and stannous octoate; the weight ratio of the A and B components is 9:1. The Chinese invention patent with publication number CN113524836B discloses a prefabricated thermoplastic elastomer basketball court floor and a preparation method thereof, wherein the basketball court floor comprises an elastomer composition and a film covering the surface of the elastomer composition, wherein the elastomer composition comprises 20 to 40 parts by weight of SBS, 30 to 50 parts of calcium carbonate, 30 to 50 parts of solvent oil, 10 to 15 parts of SIS, 10 to 15 parts of PP and 0.1 to 1 parts of antioxidant; the film is treated with air plasma and the outer surface of the film is modified by epoxy resin grafting and curing. However, the prior art has the technical problem that the sound insulation effect and rebound performance of the floor material are not good enough, resulting in poor floor flatness, and further improvement of its structure and composition is required. Summary of the invention

[0004] The purpose of the present invention is to provide a floor material for a bocce ball court and a preparation method thereof, so as to solve the technical problem in the prior art that the floor material has poor sound insulation and rebound performance, resulting in poor floor flatness, and further improvements are needed in its structure and composition.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: The floor material of the bocce ball court includes a non-slip surface layer, an elastic buffer layer and a sound insulation layer from top to bottom; The anti-skid surface layer is prepared from the following components in parts by weight: 5-10 parts of anti-skid particles, 15-20 parts of wear-resistant elastic microspheres, 30-40 parts of binder, 0.5-2 parts of curing agent, 0.5-2 parts of anti-aging agent, 0.5-2 parts of leveling agent and 0.5-2 parts of defoaming agent; The elastic buffer layer is prepared from the following components in parts by weight: 100-200 parts of elastic reinforcing material, 3-5 parts of catalyst, 100-150 parts of polyurethane resin and 5-10 parts of isocyanate; The sound insulation layer is prepared from the following ingredients in parts by mass: 10-20 parts of hollow glass microspheres, 50-80 parts of silicate cement, 20-50 parts of fine sand, 1-3 parts of calcium sulfoaluminate, 100-200 parts of sound insulation felt composite material, 5-10 parts of waterproof tape and 50-100 parts of steel wire mesh.

[0006] The anti-slip particles are one or more combinations of wollastonite particles, quartz sand particles, and alumina particles, and the average particle size is 0.5-1.5 mm; The binder is an acrylic resin, the curing agent is an amino resin, the anti-aging agent is one or more combinations of 168, 1010, and 1098, the leveling agent is one or more combinations of FL3600, BYK-358N, and PLP-200, and the defoaming agent is one or more combinations of STA-6300, SP-318, and BYK-021; The catalyst is one or more combinations of triethylamine, bis(dimethylaminoethyl)ether, and dibutyltin dilaurate; the polyurethane resin is one or more combinations of PU-5011, PU-608, and MC-dp04; and the isocyanate is one or two combinations of hexamethylene diisocyanate and isophorone diisocyanate.

[0007] The average particle size of the hollow glass microspheres is 50-100 μm, and the average particle size of the fine sand is 0.2-0.3 mm.

[0008] A method for preparing a floor material for a bocce ball court comprises the following steps: S1. Laying the sound insulation layer: clean the base layer, flatten and align the sound insulation felt composite material, seal the gaps between the felts with waterproof tape, mix silicate cement, fine sand, hollow glass microspheres and calcium sulfoaluminate evenly, add water to prepare concrete, pour the concrete on the sound insulation felt, vibrate and flatten it, and then lay the steel mesh to obtain the sound insulation layer; S2. Laying an elastic buffer layer: Mix and stir the polyurethane resin, catalyst and isocyanate, pour them on the top of the sound insulation layer, flatten the surface and lay the elastic reinforcing material to obtain an elastic buffer layer; S3, laying an anti-skid surface layer: adding a binder to a butyl acetate solvent, stirring at a stirring rate of 100-200 rpm for 5-10 min, adding a leveling agent, a defoamer and an anti-aging agent, stirring at a stirring rate of 200-300 rpm for 10-15 min, finally adding anti-skid particles and wear-resistant elastic microspheres, stirring at a stirring rate of 100-200 rpm for 10-15 min, preparing an anti-skid coating, and evenly spreading it on the elastic buffer layer by rolling, controlling the thickness of the anti-skid surface layer to 0.5-1 cm, and drying and curing for 1-2 days to obtain the anti-skid surface layer; S4. Acceptance: After the anti-slip surface layer is completely dry and solidified, clean the ground surface, measure the ground flatness, and obtain the ground material for the bocce court.

[0009] Preferably, the method for preparing the wear-resistant elastic microspheres comprises the following steps: S11, adding 5-10 parts of straw fiber to 50-60 parts of 5-8 wt % sodium hydroxide solution, reacting at room temperature for 3-4 hours, and drying at 80-100° C. for 6-8 hours to obtain alkali-treated straw fiber; S12, dispersing 5-10 parts of alkali-treated straw fiber in 50-60 parts of deionized water, adding 15-40 parts of citric acid under stirring, reacting at 120-140° C. for 12-18 hours, filtering and washing with water until neutral, and drying at 80-100° C. to obtain esterified straw fiber; S13, put 50-70 parts of rubber particles, 5-10 parts of alkali-treated straw fibers and 1-3 parts of polyethylene wax into a high-speed mixer, stir and blend them evenly, add them into a twin-rod extruder, set the extrusion port temperature to 150-180°C, extrude and granulate, and obtain wear-resistant elastic microspheres.

[0010] Preferably, the straw fibers in S11 have a mesh size of 80-100.

[0011] Preferably, the mass ratio of the alkali-treated straw fiber to the citric acid in S11 is 1:3-3.5.

[0012] Preferably, the rubber particles in S13 are one or more combinations of EPDM rubber particles, butyl rubber particles, and natural rubber particles.

[0013] Preferably, the average particle size of the wear-resistant elastic microspheres in S13 is 0.5-2 mm.

[0014] Preferably, the method for preparing the elastic reinforced material comprises the following steps: S21, heat 0.5-1 part of phenylboric acid and 4-4.5 parts of boric acid to 170-180°C and keep warm for 1-2 hours, then pour in 92-104 parts of siloxane and 5-10 parts of reinforcing material, control the stirring rate to 15-20 rpm, react at 170-180°C for 2-3 hours, and add 1-3 parts of plasticizer to obtain a reinforced gel; S22, adding 3-5 parts of silane coupling agent to 500-800 parts of deionized water, stirring at 40-50° C. for 2-4 hours, adding ammonia water to adjust the pH to 9-10, adding 3-5 parts of silica sol with a silica content of 40-50 wt% and stirring for 1-2 hours, completely soaking the sponge skeleton for 5-10 minutes, taking out and squeezing the sponge skeleton, and drying at 60-70° C. to obtain a modified sponge skeleton; S23, adding 80-100 parts of the reinforcing gel to 50-100 parts of an ethanol aqueous solution with an ethanol content of 50-60wt%, stirring evenly, completely soaking the modified sponge skeleton, ultrasonicating for 10-15min, taking out the completely soaked modified sponge skeleton, drying and curing at 60-70°C, turning the modified sponge skeleton every 10-20min during the drying and curing period until the gel is completely cured to obtain a reinforcement; S24. Cut the reinforcement into a size of 1.5×1.5×1.5 cm, arrange it in a dot array in a mold with a reinforcement interval of 2 to 4 cm, mix and stir 50 to 60 parts of polyurethane resin and 2 to 5 parts of isocyanate, pour them into the mold, and dry them to obtain an elastic reinforced material.

[0015] Preferably, the siloxane in S21 is one or more combinations of hydroxysiloxane, dimethylsiloxane and hydrogen-containing siloxane.

[0016] Preferably, the reinforcing material in S21 is one or more combinations of nano-silicon dioxide, nano-calcium carbonate, and poly(2-ethylhexyl methacrylate).

[0017] Preferably, the plasticizer in S21 is one or more combinations of oleic acid, epoxidized soybean oil, and glyceryl monooleate.

[0018] Preferably, the mass ratio of boric acid to siloxane in S21 is 1:20-23.

[0019] Preferably, the silane coupling agent in S22 is one or more combinations of KH-151, KH-171, and KH-570.

[0020] Preferably, the sponge skeleton in S22 is one or more combinations of melamine sponge, polyethylene sponge and polyurethane sponge.

[0021] Preferably, the method for preparing the sound insulation felt composite material comprises the following steps: S31, mixing polyvinyl butyral and polypropylene glycol sebacate evenly, adding them into an extruder, and extruding a molten sheet at 130-150° C., and controlling the thickness to be 2-4 mm; S32, rolling out the acrylic sound insulation felt, the molten sheet and the hemp fiberboard in order from top to bottom, compacting them at a pressure of 5-6 MPa until the molten sheet is cooled, to obtain a sound insulation felt composite material.

[0022] Preferably, the mass ratio of polyvinyl butyral to polypropylene sebacate in S31 is 7-8:2-3.

[0023] Preferably, the thickness of the acrylic sound insulation felt in S32 is 4-6 mm, the thickness of the hemp fiberboard is 4-6 mm, and the thickness of the sound insulation felt composite material is 10-15 mm.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. Based on the prior art, the present invention improves the level of the floor material of the petanque court, uses polyvinyl butyral bonded acrylic sound insulation felt and hemp fiberboard as a sound insulation felt composite material, and lays it on the surface of the base layer to enhance the sound insulation effect of the floor of the petanque court. The elastic buffer layer of the elastic reinforced material obtained by introducing a lattice-arranged reinforcement has significant creep resistance and excellent impact hardening properties, and the anti-skid surface layer prepared by acrylic resin with anti-skid particles and wear-resistant elastic microspheres has excellent waterproof, wear-resistant, anti-skid and anti-aging properties.

[0025] 2. The wear-resistant elastic microspheres prepared by adding esterified straw fibers obtained by reacting alkali-treated straw fibers with citric acid as a toughening agent to rubber have excellent wear resistance, light weight and anti-aging properties. The esterified straw fibers enhance the interfacial bonding between the fibers and the rubber, and strengthen the toughness and rheological shaping ability of the wear-resistant elastic microspheres. In addition, the straw fibers, as a renewable material, can reduce the production cost of the wear-resistant elastic microspheres.

[0026] 3. The present invention reacts boric acid and phenylboric acid with siloxane in a certain mass ratio, and then adds reinforcing materials to obtain a reinforced gel having excellent shear hardening and thermal stability. The elastic reinforced material prepared by compounding the reinforced body with a hydrophobically modified sponge skeleton in a lattice arrangement will quickly harden when subjected to a strong impact, and will slowly return to its original state when there is no external impact, and has excellent adaptive repair performance and creep resistance.

[0027] 4. The present invention uses polyvinyl butyral to bond acrylic sound insulation felt and hemp fiberboard as the sound insulation felt composite material, which has a sandwich composite sound insulation structure. The hemp fiberboard has high strength and good stability. The bonding effect of polyvinyl butyral makes the overall structure of the composite material more solid and not easy to deform or break. The obtained sound insulation felt composite material is environmentally friendly and renewable and has excellent sound insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the hierarchical structure of the bocce ball court ground material and the base layer is shown.

[0030] Description of main reference numerals: 1- Anti-slip surface layer, 2- Elastic buffer layer, 3- Sound insulation layer, 4- Base layer. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in 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.

[0032] Example 1, see Figure 1 As shown, the floor material of the bocce ball court of this embodiment includes an anti-slip surface layer 1, an elastic buffer layer 2 and a sound insulation layer 3 from top to bottom; The anti-skid surface layer is prepared from the following components in parts by mass: 8 parts of anti-skid particles, 15 parts of wear-resistant elastic microspheres, 35 parts of binder, 1 part of curing agent, 1 part of anti-aging agent, 1 part of leveling agent and 1 part of defoaming agent; The elastic buffer layer is prepared from the following components in parts by mass: 150 parts of elastic reinforcing material, 3 parts of catalyst, 120 parts of polyurethane resin and 6 parts of isocyanate; The sound insulation layer is prepared from the following ingredients in parts by mass: 20 parts of hollow glass microspheres, 60 parts of silicate cement, 30 parts of fine sand, 2 parts of calcium sulfoaluminate, 150 parts of sound insulation felt composite material, 8 parts of waterproof tape and 60 parts of steel wire mesh.

[0033] The anti-slip particles are quartz sand particles with an average particle size of 1 mm; The binder model is BZMS-01, the curing agent model is CYMEL 323, the anti-aging agent model is 168, the leveling agent model is FL3600, and the defoaming agent model is SP-318; The catalyst is triethylamine, the polyurethane resin is PU-5011, and the isocyanate is HT-100 hexamethylene diisocyanate.

[0034] The average particle size of the hollow glass microspheres is 50 μm, and the average particle size of the fine sand is 0.2 mm.

[0035] A method for preparing a floor material for a bocce ball court comprises the following steps: S1. Laying the sound insulation layer: clean the base 4, flatten and align the sound insulation felt composite material, seal the gaps between the felts with waterproof tape, mix silicate cement, fine sand, hollow glass microspheres and calcium sulfoaluminate evenly, add water to prepare concrete, pour the concrete on the sound insulation felt, vibrate and flatten it, and then lay the steel mesh to obtain the sound insulation layer; S2. Laying an elastic buffer layer: Mix and stir the polyurethane resin, catalyst and isocyanate, pour them on the top of the sound insulation layer, flatten the surface and lay the elastic reinforcing material to obtain an elastic buffer layer; S3, laying an anti-skid surface layer: adding a binder to a butyl acetate solvent, stirring at a stirring rate of 100 rpm for 5 min, adding a leveling agent, a defoamer and an anti-aging agent, stirring at a stirring rate of 300 rpm for 10 min, finally adding anti-skid particles and wear-resistant elastic microspheres, stirring at a stirring rate of 100 rpm for 10 min, to prepare an anti-skid coating, and evenly spreading it on the elastic buffer layer by roller coating, controlling the thickness of the anti-skid surface layer to 0.8 cm, and drying and curing for 2 days to obtain the anti-skid surface layer; S4. Acceptance: After the anti-slip surface layer is completely dry and solidified, clean the ground surface, measure the ground flatness, and obtain the ground material for the bocce court.

[0036] The preparation method of the wear-resistant elastic microspheres of this embodiment comprises the following steps: S11, adding 8 parts of straw fiber to 50 parts of 5wt% sodium hydroxide solution, reacting at room temperature for 3 hours, and drying at 100°C for 8 hours to obtain alkali-treated straw fiber; S12, dispersing 8 parts of alkali-treated straw fiber in 50 parts of deionized water, adding 24 parts of citric acid under stirring, reacting at 130° C. for 12 hours, filtering and washing with water until neutral, and drying at 80° C. to obtain esterified straw fiber; S13, put 60 parts of rubber particles, 8 parts of alkali-treated straw fibers and 2 parts of polyethylene wax into a high-speed mixer, stir and blend them evenly, add them into a twin-rod extruder, set the extrusion port temperature to 160°C, extrude and granulate, and obtain wear-resistant elastic microspheres with an average particle size of 1 mm.

[0037] The method for preparing the elasticity-enhanced material of this embodiment comprises the following steps: S21, heating 1 part of phenylboric acid and 4 parts of boric acid to 180°C and keeping the temperature for 2 hours, then pouring in 100 parts of siloxane and 7 parts of nano-silicon dioxide, controlling the stirring rate to 15 rpm, reacting at 180°C for 3 hours, and adding 2 parts of oleic acid to obtain a reinforced gel; S22, adding 4 parts of KH-151 to 600 parts of deionized water, stirring at 50°C for 4 hours, adding ammonia water to adjust the pH to 10, adding 3 parts of silica sol with a silica content of 45wt% and stirring for 2 hours, completely soaking the melamine sponge for 5 minutes, taking out and squeezing the melamine sponge, and drying at 60°C to obtain a modified sponge skeleton; S23, adding 80 parts of the reinforcing gel to 60 parts of an ethanol aqueous solution with an ethanol content of 50wt%, stirring evenly, completely soaking the modified sponge skeleton, ultrasonicating for 15min, taking out the completely soaked modified sponge skeleton, drying and curing at 60°C, turning the modified sponge skeleton every 10min during the drying and curing period until the gel is completely cured to obtain a reinforcement; S24. Cut the reinforcement into a size of 1.5×1.5×1.5 cm, arrange them in a dot array in the mold with a reinforcement interval of 3 cm, mix and stir 50 parts of PU-5011 polyurethane resin and 3 parts of HT-100 hexamethylene diisocyanate, pour them into the mold, and dry them to obtain an elastic reinforced material.

[0038] The preparation method of the sound insulation felt composite material of this embodiment comprises the following steps: S31, 70 parts of polyvinyl butyral and 30 parts of polypropylene sebacate are uniformly mixed and added into an extruder, and a molten sheet is extruded at 140° C. to control the thickness to be 3 mm; S32, rolling out the acrylic sound insulation felt, the molten sheet and the hemp fiberboard in order from top to bottom, compacting them at a pressure of 5 MPa until the molten sheet is cooled, to obtain a sound insulation felt composite material.

[0039] Example 2, see Figure 1 As shown, the floor material of the bocce ball court of this embodiment includes an anti-slip surface layer 1, an elastic buffer layer 2 and a sound insulation layer 3 from top to bottom; The anti-skid surface layer is prepared from the following components in parts by mass: 5 parts of anti-skid particles, 20 parts of wear-resistant elastic microspheres, 40 parts of binder, 2 parts of curing agent, 2 parts of anti-aging agent, 2 parts of leveling agent and 2 parts of defoaming agent; The elastic buffer layer is prepared from the following components in parts by mass: 190 parts of elastic reinforcing material, 4 parts of catalyst, 140 parts of polyurethane resin and 8 parts of isocyanate; The sound insulation layer is prepared from the following ingredients in parts by mass: 15 parts of hollow glass microspheres, 70 parts of silicate cement, 45 parts of fine sand, 1 part of calcium sulfoaluminate, 150 parts of sound insulation felt composite material, 10 parts of waterproof tape and 90 parts of steel wire mesh.

[0040] The anti-slip particles are wollastonite particles with an average particle size of 1.2 mm; The binder model is VD-1006, the curing agent model is CYMEL 304, the anti-aging agent model is 1010, the leveling agent model is BYK-358N, and the defoaming agent model is BYK-021; The catalyst is bis(dimethylaminoethyl)ether, the polyurethane resin is MC-dp04, and the isocyanate is HT-600 hexamethylene diisocyanate.

[0041] The average particle size of the hollow glass microspheres is 90 μm, and the average particle size of the fine sand is 0.28 mm.

[0042] A method for preparing a floor material for a bocce ball court comprises the following steps: S1. Laying the sound insulation layer: clean the base 4, flatten and align the sound insulation felt composite material, seal the gaps between the felts with waterproof tape, mix silicate cement, fine sand, hollow glass microspheres and calcium sulfoaluminate evenly, add water to prepare concrete, pour the concrete on the sound insulation felt, vibrate and flatten it, and then lay the steel mesh to obtain the sound insulation layer; S2. Laying an elastic buffer layer: Mix and stir the polyurethane resin, catalyst and isocyanate, pour them onto the sound insulation layer, flatten the surface of the sound insulation layer and lay the elastic reinforcing material to obtain an elastic buffer layer; S3, laying an anti-skid surface layer: adding a binder to a butyl acetate solvent, stirring at a stirring rate of 150 rpm for 5 min, adding a leveling agent, a defoamer and an anti-aging agent, stirring at a stirring rate of 250 rpm for 10 min, finally adding anti-skid particles and wear-resistant elastic microspheres, stirring at a stirring rate of 150 rpm for 10 min, to prepare an anti-skid coating, and evenly spreading it on the elastic buffer layer by roller coating, controlling the thickness of the anti-skid surface layer to 0.6 cm, and drying and curing for 1 day to obtain the anti-skid surface layer; S4. Acceptance: After the anti-slip surface layer is completely dry and solidified, clean the ground surface, measure the ground flatness, and obtain the ground material for the bocce court.

[0043] The preparation method of the wear-resistant elastic microspheres in this embodiment is the same as that in embodiment 1.

[0044] The difference between the elastic reinforcing material of this embodiment and that of embodiment 1 is that the reinforcing material of the reinforcing gel is changed to polyisooctyl methacrylate, and the plasticizer is changed to glyceryl monooleate.

[0045] The difference between the sound insulation felt composite material of this embodiment and that of embodiment 1 is that the composition of the molten sheet is changed to 80 parts of polyvinyl butyral and 20 parts of polypropylene sebacate.

[0046] Example 3, see Figure 1 As shown, the floor material of the bocce ball court of this embodiment includes an anti-slip surface layer 1, an elastic buffer layer 2 and a sound insulation layer 3 from top to bottom; The anti-skid surface layer is prepared from the following components in parts by mass: 8 parts of anti-skid particles, 15 parts of wear-resistant elastic microspheres, 35 parts of binder, 1 part of curing agent, 1 part of anti-aging agent, 1 part of leveling agent and 1 part of defoaming agent; The elastic buffer layer is prepared from the following components in parts by mass: 150 parts of elastic reinforcing material, 3 parts of catalyst, 120 parts of polyurethane resin and 6 parts of isocyanate; The sound insulation layer is prepared from the following ingredients in parts by mass: 20 parts of hollow glass microspheres, 60 parts of silicate cement, 30 parts of fine sand, 2 parts of calcium sulfoaluminate, 150 parts of sound insulation felt composite material, 8 parts of waterproof tape and 60 parts of steel wire mesh.

[0047] The anti-skid particles are aluminum oxide particles with an average particle size of 0.6 mm; The binder model is BZMS-01, the curing agent model is CYMEL 323, the anti-aging agent model is 168, the leveling agent model is FL3600, and the defoaming agent model is SP-318; The catalyst is triethylamine, the polyurethane resin is PU-608, and the isocyanate is isophorone diisocyanate.

[0048] The average particle size of the hollow glass microspheres is 80 μm, and the average particle size of the fine sand is 0.25 mm.

[0049] A method for preparing a floor material for a bocce ball court comprises the following steps: S1. Laying the sound insulation layer: clean the base 4, flatten and align the sound insulation felt composite material, seal the gaps between the felts with waterproof tape, mix silicate cement, fine sand, hollow glass microspheres and calcium sulfoaluminate evenly, add water to prepare concrete, pour the concrete on the sound insulation felt, vibrate and flatten it, and then lay the steel mesh to obtain the sound insulation layer; S2. Laying an elastic buffer layer: Mix and stir the polyurethane resin, catalyst and isocyanate, pour them on the top of the sound insulation layer, flatten the surface and lay the elastic reinforcing material to obtain an elastic buffer layer; S3, laying an anti-skid surface layer: adding a binder to a butyl acetate solvent, stirring at a stirring rate of 100 rpm for 5 min, adding a leveling agent, a defoamer and an anti-aging agent, stirring at a stirring rate of 300 rpm for 10 min, and finally adding anti-skid particles and wear-resistant elastic microspheres, stirring at a stirring rate of 100 rpm for 10 min to obtain an anti-skid coating, and evenly spreading it on the elastic buffer layer by roller coating, controlling the thickness of the anti-skid surface layer to 0.7 cm, and drying and curing for 2 days to obtain the anti-skid surface layer; S4. Acceptance: After the anti-slip surface layer is completely dry and solidified, clean the ground surface, measure the ground flatness, and obtain the ground material for the bocce court.

[0050] The difference between the wear-resistant elastic microspheres of this embodiment and embodiment 1 is that the rubber particles are natural rubber particles, and the average particle size of the wear-resistant elastic microspheres is 2 mm.

[0051] The difference between the elastic reinforcing material of this embodiment and that of embodiment 1 is that the sponge skeleton is polyethylene sponge and the silane coupling agent is KH-570.

[0052] The preparation method of the sound insulation felt composite material of this embodiment is the same as that of embodiment 1.

[0053] Comparative Example 1: The difference between this comparative example and Example 1 is that the wear-resistant elastic microspheres are replaced by butyl rubber particles.

[0054] Comparative Example 2: This comparative example differs from Example 1 in that in the preparation method of the elastomer, melamine sponge is used to fill polyacrylate resin and solidify the elastomer.

[0055] Comparative Example 3: This comparative example differs from Example 1 in that the sound-insulating felt composite material is replaced by a double-layered felt composite material prepared using only polyester sound-insulating felt and molten sheet material.

[0056] Performance Testing The floor materials of the bocce ball courts prepared in the embodiments and comparative examples were tested for compression recovery rate by a compression tester, wear rate by a paint film abrasion tester, sliding friction coefficient by a pendulum friction coefficient tester, and impact absorption rate by a drop weight height of 30 cm by a drop weight impact tester. The test results are shown in Table 1 below: Table 1 Serial number Compression recovery rate (%) Wear rate (750g / 500r) Sliding friction coefficient Impact absorption rate of 30cm drop height (%) Example 1 98.1 0.013 0.78 29 Example 2 97.6 0.018 0.76 26 Example 3 97.9 0.021 0.71 28 Comparative Example 1 96.5 0.043 0.62 24 Comparative Example 2 90.8 0.025 0.73 16 Comparative Example 3 95.5 0.016 0.72 24 It can be seen from the data in Table 1 that the compression recovery rate of the petanque court floor materials of Examples 1 to 3 is above 97.5%, and the impact absorption rate of a drop from a height of 30 cm is between 26% and 29%, indicating that the petanque court floor materials prepared by the present invention have good impact resistance and adaptive repair performance; the wear rate is between 0.013 and 0.021 (750g / 500r), indicating that the petanque court floor materials prepared by the present invention have good wear resistance; the sliding friction coefficient is between 0.71 and 0.78, indicating that the petanque court floor materials prepared by the present invention have excellent anti-slip properties.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0058] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The ground material of the petanque court is characterized by: It comprises, from top to bottom, an anti-slip surface layer (1), an elastic buffer layer (2) and a sound insulation layer (3); The anti-skid surface layer is prepared from the following components in parts by weight: 5-10 parts of anti-skid particles, 15-20 parts of wear-resistant elastic microspheres, 30-40 parts of binder, 0.5-2 parts of curing agent, 0.5-2 parts of anti-aging agent, 0.5-2 parts of leveling agent and 0.5-2 parts of defoaming agent; The elastic buffer layer is prepared from the following components in parts by mass: 100-200 parts of elastic reinforcing material, 3-5 parts of catalyst, 100-150 parts of polyurethane resin and 5-10 parts of isocyanate; The sound insulation layer is prepared from the following ingredients in parts by mass: 10-20 parts of hollow glass microspheres, 50-80 parts of silicate cement, 20-50 parts of fine sand, 1-3 parts of calcium sulfoaluminate, 100-200 parts of sound insulation felt composite material, 5-10 parts of waterproof tape and 50-100 parts of steel wire mesh.

2. The petanque court floor material according to claim 1, characterized in that: The anti-slip particles are one or more combinations of wollastonite particles, quartz sand particles, and alumina particles, and the average particle size is 0.5-1.5 mm; the binder is acrylic resin, the curing agent is amino resin, the anti-aging agent is one or more combinations of 168, 1010, and 1098, the leveling agent is one or more combinations of FL3600, BYK-358N, and PLP-200, and the defoaming agent is one or more combinations of STA-6300, SP-318, and BYK-021; the catalyst is one or more combinations of triethylamine, bis(dimethylaminoethyl) ether, and dibutyltin dilaurate, the polyurethane resin is one or more combinations of PU-5011, PU-608, and MC-dp04, and the isocyanate is one or two combinations of hexamethylene diisocyanate and isophorone diisocyanate; the average particle size of the hollow glass microspheres is 50-100 μm, and the average particle size of the fine sand is 0.2-0.3 mm.

3. A method for preparing a floor material for a bocce ball court, characterized in that: The steps include: S1. Laying the sound insulation layer: clean the base layer, flatten and align the sound insulation felt composite material, seal the gaps between the felts with waterproof tape, mix silicate cement, fine sand, hollow glass microspheres and calcium sulfoaluminate evenly, add water to prepare concrete, pour the concrete on the sound insulation felt, vibrate and flatten it, and then lay the steel mesh to obtain the sound insulation layer; S2. Laying an elastic buffer layer: Mix and stir the polyurethane resin, catalyst and isocyanate, pour them onto the sound insulation layer, flatten the surface of the sound insulation layer and lay the elastic reinforcing material to obtain an elastic buffer layer; S3, laying an anti-skid surface layer: adding a binder to a butyl acetate solvent, stirring at a stirring rate of 100-200 rpm for 5-10 min, adding a leveling agent, a defoamer and an anti-aging agent, stirring at a stirring rate of 200-300 rpm for 10-15 min, finally adding anti-skid particles and wear-resistant elastic microspheres, stirring at a stirring rate of 100-200 rpm for 10-15 min, preparing an anti-skid coating, and evenly spreading it on the elastic buffer layer by rolling, controlling the thickness of the anti-skid surface layer to 0.5-1 cm, and drying and curing for 1-2 days to obtain the anti-skid surface layer; S4. Acceptance: After the anti-slip surface layer is completely dry and solidified, clean the ground surface, measure the ground flatness, and obtain the ground material for the bocce court.

4. The method for preparing the floor material for a bocce ball court according to claim 3, characterized in that: The preparation method of the wear-resistant elastic microspheres comprises the following steps: S11, adding 5-10 parts of straw fiber to 50-60 parts of 5-8 wt % sodium hydroxide solution according to weight, reacting at room temperature for 3-4 hours, and drying at 80-100° C. for 6-8 hours to obtain alkali-treated straw fiber; S12, dispersing 5-10 parts of alkali-treated straw fiber in 50-60 parts of deionized water according to mass parts, adding 15-40 parts of citric acid under stirring, reacting at 120-140° C. for 12-18 hours, filtering and washing with water until neutral, and drying at 80-100° C. to obtain esterified straw fiber; S13. According to the mass parts, 50-70 parts of rubber particles, 5-10 parts of alkali-treated straw fibers and 1-3 parts of polyethylene wax are put into a high-speed mixer and stirred and blended evenly. Then, the mixture is added into a twin-rod extruder and the extrusion port temperature is set to 150-180° C., and extrusion granulation is performed to obtain wear-resistant elastic microspheres.

5. The method for preparing the floor material for a bocce ball court according to claim 4, characterized in that: The straw fiber in S11 is 80-100 mesh, and the mass ratio of alkali-treated straw fiber to citric acid is 1:3-3.5; the rubber particles in S13 are one or more combinations of EPDM rubber particles, butyl rubber particles, and natural rubber particles, and the average particle size of the wear-resistant elastic microspheres is 0.5-2 mm.

6. The method for preparing the petanque court floor material according to claim 3, characterized in that: The preparation method of the elastic reinforced material comprises the following steps: S21. Heat 0.5-1 parts of phenylboric acid and 4-4.5 parts of boric acid to 170-180°C and keep warm for 1-2 hours, then add 95-110 parts of siloxane and 5-10 parts of reinforcing material, control the stirring rate to 15-20 rpm, react at 170-180°C for 2-3 hours, and add 1-3 parts of plasticizer to obtain a reinforced gel; S22, according to the mass parts, add 3-5 parts of silane coupling agent to 500-800 parts of deionized water, stir at 40-50°C for 2-4h, add ammonia water to adjust the pH to 9-10, add 3-5 parts of silica sol with a silica content of 40-50wt% and stir for 1-2h, completely soak the sponge skeleton for 5-10min, take out and squeeze the sponge skeleton, and dry at 60-70°C to obtain a modified sponge skeleton; S23, according to the mass fraction, add 80-100 parts of the reinforcing gel to 50-100 parts of an ethanol aqueous solution with an ethanol content of 50-60wt%, stir evenly, completely infiltrate the modified sponge skeleton, ultrasonicate for 10-15min, take out the completely infiltrated modified sponge skeleton, dry and solidify at 60-70°C, turn over the modified sponge skeleton every 10-20min during the drying and solidification period until the gel is completely solidified to obtain a reinforcement; S24. Cut the reinforcement into a size of 1.5×1.5×1.5 cm, arrange it in a dot array in a mold with a reinforcement interval of 2 to 4 cm, mix and stir 50 to 60 parts of polyurethane resin and 2 to 5 parts of isocyanate, pour them into the mold, and dry them to obtain an elastic reinforced material.

7. The method for preparing the floor material for a bocce ball court according to claim 6, characterized in that: The siloxane in S21 is one or more combinations of hydroxysiloxane, dimethylsiloxane, and hydrogen-containing siloxane; the reinforcing material is one or more combinations of nano-silicon dioxide, nano-calcium carbonate, and poly(ethylhexyl methacrylate); the plasticizer is one or more combinations of oleic acid, epoxy soybean oil, and monooleyl glycerol; the mass ratio of boric acid to siloxane is 1:20-23; the silane coupling agent in S22 is one or more combinations of KH-151, KH-171, and KH-570; and the sponge skeleton is one or more combinations of melamine sponge, polyethylene sponge, and polyurethane sponge.

8. The method for preparing the floor material for a bocce ball court according to claim 3, characterized in that: The preparation method of the sound insulation felt composite material comprises the following steps: S31, mixing polyvinyl butyral and polypropylene glycol sebacate evenly, adding them into an extruder, and extruding a molten sheet at 130-150° C., and controlling the thickness to be 2-4 mm; S32, rolling out the acrylic sound insulation felt, the molten sheet and the hemp fiberboard in order from top to bottom, compacting them at a pressure of 5-6 MPa until the molten sheet is cooled, to obtain a sound insulation felt composite material.

9. The method for preparing the floor material for a bocce ball court according to claim 8, characterized in that: The mass ratio of polyvinyl butyral to polypropylene glycol sebacate in S31 is 7-8:2-3; the thickness of the acrylic sound insulation felt in S32 is 4-6 mm, the thickness of the hemp fiberboard is 4-6 mm, and the thickness of the sound insulation felt composite material is 10-15 mm.

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