Ground mat for pike court and preparation method of ground mat

Abstract

The invention relates to a ground mat for a Pick court and a preparation method of the ground mat, and belongs to the technical field of plastic ground mat preparation, the ground mat sequentially comprises a wear-resistant layer, a first elastic foaming layer, a bonding layer, a second elastic foaming layer and a cementing layer, and the cementing layer is in contact with the ground. According to the ground mat, the thicknesses and the densities of all the layers are matched with one another, so that the ground mat meets the requirement of a Pick court for the resilience force of the ground mat, the thickness of the wear-resistant layer is 1-1.5 mm, and the density of the wear-resistant layer is 0.1-1.1 g / cm < 3 >; the thickness of the first elastic foaming layer is 1.5-2.5 mm, and the density of the first elastic foaming layer is 0.08-0.20 g / cm < 3 >; the thickness of the bonding layer is 4.5-5.5 mm, and the density of the bonding layer is 0.30-0.50 g / cm < 3 >; the thickness of the second elastic foaming layer is 2.5 to 3.5 mm, and 0.08 to 0.20 g / cm < 3 >; the density of the cementing layer is 0.90-1.60 g / cm < 3 >, and the total thickness of the ground mat is 10-15 mm.

Description

Technical Field

[0001] The present invention belongs to the technical field of plastic floor mat preparation, and in particular, relates to a floor mat for a pickleball court and a preparation method thereof. Background Art

[0002] Existing pickleball court mats are generally made of plastic mats, which are generally made of polyvinyl chloride (PVC) material or highly foamed polyethylene (PE) material. The resilience of these mats is average, which can meet the elasticity requirements of ordinary balls (such as basketball and football), but cannot meet the requirements of pickleball for the resilience of the mat.

[0003] Therefore, it is necessary to provide a high-resilience pickleball court mat and a preparation method thereof. Summary of the invention

[0004] The object of the present invention is to provide a pickleball court mat and a preparation method thereof.

[0005] The technical problem to be solved by the present invention is to solve the problem that the resilience of the existing floor mat is difficult to meet the requirements of the pickleball court.

[0006] The first object of the present invention can be achieved by the following technical solutions:

[0007] A floor mat for a pickleball court comprises a first elastic foam layer, an adhesive layer, a second elastic foam layer and a gluing layer in sequence, wherein the gluing layer contacts the ground.

[0008] Furthermore, the thickness of the wear-resistant layer is 1-1.5 mm, the thickness of the first elastic foam layer is 1.5-2.5 mm, the thickness of the adhesive layer is 4.5-5.5 mm, the thickness of the second elastic foam layer is 2.5-3.5 mm, and the total thickness of the floor mat is 10-15 mm.

[0009] Furthermore, the density of the wear-resistant layer is 0.9-1.1 g / cm 3 The density of the first elastic foam layer is 0.08-0.20 g / cm 3 The density of the adhesive layer is 0.30-0.50 g / cm 3 The density of the second elastic foam layer is 0.20-0.40 g / cm 3 The density of the adhesive layer is 0.90-1.60 g / cm 3 .

[0010] Furthermore, the wear-resistant layer is a polyurethane layer.

[0011] Furthermore, the first elastic foam layer is a TPEE foam layer or a TPU foam layer.

[0012] Furthermore, the adhesive layer is a first polyacrylate layer.

[0013] Furthermore, the second elastic foam layer is an EVA foam layer.

[0014] Furthermore, the adhesive layer is a second polyacrylate layer.

[0015] Furthermore, the TPEE foaming layer is made of a TPEE base material, a first cross-linking agent and a first nucleating agent through blending and supercritical foaming.

[0016] Furthermore, the first cross-linking agent is one of isobutylene maleic anhydride polymer and styrene maleic anhydride polymer, or a mixture of the two in any ratio.

[0017] Furthermore, the mass ratio of the TPEE base material, the first cross-linking agent, and the first nucleating agent is 100:1-4:1-4.

[0018] Furthermore, the preparation of the TPEE foaming layer includes:

[0019] The TPEE base material, the first crosslinking agent and the first nucleating agent are mixed, melt-blended and granulated to obtain first mixed particles. The temperature of the melt-blending is 150-175° C., and the melt index of the first mixed particles is 2-6 g / 10 min.

[0020] The first mixed pellets are added into an extruder, melted, supercritical gas is injected into the middle section of the extruder, and then blended, extruded, and pelletized underwater to obtain foamed pellets;

[0021] The foamed particles are molded by steam molding to obtain the TPEE foamed layer.

[0022] Furthermore, the melting temperature of the first mixed particles is in the range of 150-190°C.

[0023] Furthermore, the temperature of the temperature zone into which the supercritical gas is injected is set to 180-200°C.

[0024] Furthermore, the injection amount of the supercritical gas is 10-45% of the total weight of the TPEE pad raw material.

[0025] Furthermore, the injection pressure of the supercritical gas is 15-30 MPa.

[0026] Furthermore, the temperature of the temperature zone for blending the injected supercritical gas and the melt of the first mixed particles is set to 150-190°C.

[0027] Furthermore, the extrusion temperature is 150-190°C.

[0028] Furthermore, the temperature of the underwater pelletizing is 40-80°C.

[0029] Furthermore, the TPU foaming layer is made by mixing material A and material B in a mass ratio of 1.8-2.8:1 and then subjecting the mixture to supercritical foaming;

[0030] The material A comprises the following raw materials in parts by weight: 30-55 parts of polyester polyol, 45-70 parts of polyether polyol, 3-12 parts of chain extender, 1-4 parts of catalyst, 2-5 parts of second cross-linking agent, and 1-3 parts of second nucleating agent.

[0031] The material B is one or a mixture of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate and hexamethylene diisocyanate.

[0032] Furthermore, the chain extender is one of 1,4-butanediol and 1,6-hexanediol or a mixture thereof.

[0033] Furthermore, the catalyst is one or a mixture of several organotin catalysts.

[0034] Furthermore, the second cross-linking agent is one of trimethylolpropane and castor oil.

[0035] Furthermore, the preparation of the TPU foaming layer includes:

[0036] After mixing material A, material B is added, and then melt extruded and granulated to obtain second mixed particles. The temperature of melt blending is 150-180°C, and the melt index of the first mixed particles is 1-5g / 10min;

[0037] The second mixed pellets are added into the extruder, melted, supercritical gas is injected into the middle section of the extruder, and then blended, extruded, and pelletized underwater to obtain foamed pellets;

[0038] The foamed particles are molded by steam molding to obtain a TPU foam layer.

[0039] Furthermore, the melting temperature of the second mixed particles is in the range of 150-190°C.

[0040] Furthermore, the temperature of the temperature zone into which the supercritical gas is injected is set to 180-200°C.

[0041] Furthermore, the injection amount of the supercritical gas is 10-45% of the total weight of the TPU pad raw material.

[0042] Furthermore, the injection pressure of the supercritical gas is 15-30 MPa.

[0043] Furthermore, the temperature of the blending zone of the injected supercritical gas and the melt of the second mixed particles is set to 150-190°C.

[0044] Furthermore, the extrusion temperature is 150-190°C.

[0045] Furthermore, the temperature of the underwater pelletizing is 40-80°C.

[0046] Furthermore, the first nucleating agent and the second nucleating agent are the same or different and are one or a mixture of calcium carbonate, talcum powder, montmorillonite, and carbon fiber.

[0047] Furthermore, the first elastic foam layer is a corrosion-resistant TPEE foam layer or a corrosion-resistant TPU foam layer;

[0048] The corrosion-resistant TPEE foaming layer or the corrosion-resistant TPU foaming layer is made by introducing a modified polyacrylate polymer into the raw material and foaming the layer, that is:

[0049] The corrosion-resistant TPEE foaming layer is made of a TPEE base material, a first cross-linking agent, a first nucleating agent, a first foaming agent and a modified polyacrylate polymer by melt blending and foaming; the mass ratio of the modified polyacrylate polymer to the TPEE base material is 0.5-2:10;

[0050] The corrosion-resistant TPU foaming layer is made by foaming material A, material B and modified polyacrylate polymer; the mass ratio of the modified polyacrylate polymer to material A is 1-2.5:10.

[0051] The modified polyacrylate polymer is prepared by emulsion polymerization of acrylic acid, hydroxyethyl acrylate and corrosion-resistant olefin monomers.

[0052] Furthermore, the mass ratio of the acrylic acid, hydroxyethyl acrylate and corrosion-resistant olefin monomer is 15-25:50-70:15-25.

[0053] Furthermore, the emulsion polymerization reaction comprises:

[0054] After uniformly mixing hydroxyethyl acrylate, corrosion-resistant olefin monomer, emulsifier and water, a portion of the initiator solution is added dropwise under a nitrogen atmosphere at the temperature of the first stage of prepolymerization. After complete addition, the mixture is kept warm and stirred for 1.5-2 hours. The mixture is cooled to room temperature, and acrylic acid is added and stirred evenly. The mixture is heated to the temperature of the second stage of prepolymerization under nitrogen, and the pH value of the emulsion is adjusted to between 8.5 and 9.5. The remaining initiator solution is added dropwise under a nitrogen atmosphere at the temperature of the second stage of prepolymerization. After complete addition, the mixture is stirred for 5-8 hours, cooled, demulsified, dried, and washed to obtain a modified polyacrylate polymer.

[0055] Furthermore, the temperature of the first stage of prepolymerization is 70-80°C.

[0056] Furthermore, the temperature of the second stage of prepolymerization is 75-85°C.

[0057] Furthermore, the fatty alcohol polyoxyethylene ether is one of the fatty alcohol polyoxyethylene ether and sodium dodecylbenzene sulfonate.

[0058] In the present invention, the modified polyacrylate is introduced into the elastic raw material. On the one hand, the peeling force between the first elastic foam layer and the adhesive layer is improved, thereby improving the durability of the floor mat. On the other hand, the introduced corrosion-resistant olefin monomer with siloxane side chains makes the first elastic foam layer have excellent corrosion resistance (water resistance, salt resistance and chemical solvent resistance), thereby improving the obtained floor mat to be suitable not only for indoor pickleball courts, but also for outdoor pickleball courts.

[0059] Furthermore, the corrosion-resistant olefin monomer is obtained by activating isobornyl acrylamide in an organic solvent under the action of sodium hydride and then reacting it with Y-chloropropyltrimethoxysilane in an organic solvent to undergo a substitution reaction.

[0060] Furthermore, the activation reaction temperature is 40-55° C. and the time is 1-3 h.

[0061] Furthermore, the molecular structural formula of the corrosion-resistant olefin monomer is as follows.

[0062]

[0063] Furthermore, the molar ratio of isobornyl acrylamide, sodium hydride and Y-chloropropyltrimethoxysilane is 1:1-2:1-1.5.

[0064] Furthermore, the first polyacrylate layer and the second polyacrylate layer may be the same or different, and are made by curing polyacrylate emulsion, which is well known in the art and will not be described in detail in the present invention.

[0065] Furthermore, the EVA foaming layer comprises the following raw materials in parts by weight: 100 parts of EVA, 1-4 parts of a third cross-linking agent, and 0.5-4.5 parts of a first foaming agent.

[0066] Furthermore, the crosslinking agent is one of isobutylene maleic anhydride polymer and styrene maleic anhydride polymer or a mixture of the two in any ratio.

[0067] Furthermore, the first foaming agent is one of AC foaming agents.

[0068] Furthermore, in a more specific embodiment of the present invention, the raw materials of each layer of the floor mat also include pigments and / or antioxidants and / or UV resistant agents, which facilitates coloring, antioxidant enhancement modification, and UV resistance enhancement of each layer of the floor mat. In the present invention, the types of the pigments, antioxidants, and UV resistant agents are not specifically limited.

[0069] The second object of the present invention can be achieved by the following technical solutions:

[0070] A method for preparing a pickleball court mat, comprising:

[0071] Prepare a first elastic foam layer; prepare an adhesive layer; prepare a second elastic foam layer; prepare a gluing layer;

[0072] One side of the glue layer is protected, and the glue layer, the second elastic foam layer, the adhesive layer and the first elastic foam layer are stacked in sequence and molded to obtain a floor mat, wherein the unprotected side of the glue layer contacts the second elastic foam layer.

[0073] Beneficial effects of the present invention:

[0074] In order to solve the problems in the background technology and take into account the production cost of the floor mat, the present invention provides a floor mat with a multi-layer structure (comprising a wear-resistant layer, a first elastic foam layer, an adhesive layer, a second elastic foam layer and a gluing layer in sequence, and the gluing layer is in contact with the ground). Through the mutual coordination between the thickness and density of the aforementioned layers, the floor mat meets the requirements of the pickleball court for the rebound force of the floor mat, and in the floor mat: the thickness of the wear-resistant layer is 1-1.5mm, the thickness of the first elastic foam layer is 1.5-2.5mm, the thickness of the adhesive layer is 4.5-5.5mm, the thickness of the second elastic foam layer is 2.5-3.5mm, the total thickness of the floor mat is 10-15mm, and the density of the wear-resistant layer is 0.9-1.1g / cm 3 The density of the first elastic foam layer is 0.08-0.20g / cm 3 The density of the adhesive layer is 0.30-0.50 g / cm 3 The density of the second elastic foam layer is 0.20-0.40 g / cm 3 The density of the adhesive layer is 0.90-1.60 g / cm 3 .

[0075] In addition, in order to improve the peeling property between the first elastic foam layer and the adhesive layer and extend the durability of the floor mat, the present invention introduces modified polyacrylate into the first elastic foam layer, and utilizes the good adhesion of the modified polyacrylate and the siloxane side chains therein to improve the peeling property between the first elastic foam layer and the adhesive layer, while improving the corrosion resistance of the first elastic foam layer. DETAILED DESCRIPTION

[0076] 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.

[0077] Example 1

[0078] Preparation of corrosion-resistant olefin monomers:

[0079] After mixing 0.1 mol isobornyl acrylamide and 100 mL N, N-dimethylformamide, add 0.1 mol sodium hydride, heat to 40°C, stir for 3 h, then add 0.1 mol Y-chloropropyltrimethoxysilane, heat to 75°C, keep stirring and react for 24 h, then cool to room temperature, pour the reaction solution into ethyl acetate, wash with deionized water and saturated brine in turn, and distill under reduced pressure to obtain corrosion-resistant olefin monomer.

[0080] Example 2

[0081] Preparation of corrosion-resistant olefin monomers:

[0082] After mixing 0.1 mol isobornyl acrylamide and 100 mL N, N-dimethylformamide, add 0.15 mol sodium hydride, heat to 55°C, stir for 1 hour, then add 0.15 mol Y-chloropropyltrimethoxysilane, heat to 90°C, keep stirring and react for 6 hours, then cool to room temperature, pour the reaction solution into ethyl acetate, wash with deionized water and saturated brine in turn, and distill under reduced pressure to obtain corrosion-resistant olefin monomer.

[0083] Example 3

[0084] Preparation of modified polyacrylate polymers:

[0085] After 50g of hydroxyethyl acrylate, 25g of the corrosion-resistant olefin monomer prepared in Example 1, 1.5g of fatty alcohol polyoxyethylene ether and 120g of water are mixed evenly, 10g of initiator solution (the initiator solution is formed by mixing 2g of ammonium persulfate and 30g of water) is added dropwise in a nitrogen atmosphere at 70°C. After the addition is complete, the mixture is kept warm and stirred for 1.5h. The mixture is cooled to room temperature, 25g of acrylic acid is added, stirred evenly, heated to 80°C under nitrogen, and the pH value of the emulsion is adjusted to between 8.5 and 9.5. The remaining 20g of the initiator solution is added dropwise in a nitrogen atmosphere. After the addition is complete, the mixture is stirred for 6h. The mixture is cooled, demulsified, dried, and washed to obtain a modified polyacrylate polymer.

[0086] Example 4

[0087] Preparation of modified polyacrylate polymers:

[0088] After mixing 70g of hydroxyethyl acrylate, 15g of the corrosion-resistant olefin monomer prepared in Example 2, 3g of sodium dodecylbenzene sulfonate and 120g of water, 10g of initiator solution (the initiator solution is formed by mixing 2.5g of potassium persulfate and 30g of water) is added dropwise in a nitrogen atmosphere at 80°C. After the addition is complete, the mixture is kept at 75°C and stirred for 2h. The mixture is cooled to room temperature, 15g of acrylic acid is added and stirred evenly. The mixture is heated to ℃ under nitrogen and the pH value of the emulsion is adjusted to between 8.5 and 9.5. The remaining 20g of the initiator solution is added dropwise in a nitrogen atmosphere. After the addition is complete, the mixture is stirred for 8h. The mixture is cooled, demulsified, dried and washed to obtain a modified polyacrylate polymer.

[0089] Example 5

[0090] Preparation of floor mats:

[0091] 1. Prepare the raw materials (by weight):

[0092] Wear-resistant layer: 100 parts of polyurethane (for example, BASF 1170A), 2 parts of white carbon black, 1 part of antioxidant 1010, 0.5 parts of antioxidant 168;

[0093] TPU foaming layer: Material A: includes the following raw materials by weight: 30 parts of polyester polyol, 70 parts of polyether polyol, 3 parts of 1,6-hexanediol, 1 part of dioctyltin dilaurate, 2 parts of trimethylolpropane, and 1 part of calcium carbonate; Material B is hexamethylene diisocyanate;

[0094] Adhesive layer: First polyacrylate layer: prepare polyacrylate monomer (mixed with methyl acrylate and hydroxyethyl acrylate in a mass ratio of 2:1), polyethylene glycol (mixed with polyethylene glycol 1000 and polyethylene glycol 600 in a mass ratio of 1:1), water in a mass ratio of 10:1:30, and prepare benzoyl peroxide in an amount of 2% by mass of the polyacrylate monomer;

[0095] The second elastic foam layer: an EVA foam layer, comprising the following raw materials in parts by weight: 100 parts of EVA, 1 part of isobutylene maleic anhydride polymer, and 0.5 parts of AC-6000;

[0096] Adhesive layer: Second polyacrylate layer: 80 parts of polyacrylate emulsion (solid content 40%), 20 parts of styrene acrylic emulsion (solid content 45%), 2 parts of ammonia water, 7 parts of polyethylene glycol, 10 parts of white carbon black, 0.5 parts of defoaming agent (polydimethylsiloxane), 0.1 parts of (dibenzoyl peroxide);

[0097] Prepare polyacrylate monomer (composed of methyl acrylate and hydroxyethyl acrylate mixed in a mass ratio of 2:1), polyethylene glycol (composed of polyethylene glycol 1000 and polyethylene glycol 600 mixed in a mass ratio of 1:1), and water according to a mass ratio of 10:1:30, and prepare benzoyl peroxide at 2% by mass of the polyacrylate monomer;

[0098] 2. Preparation of each layer:

[0099] Wear-resistant layer: After the raw materials of the wear-resistant layer are mixed, they are melt-extruded and formed into a thin layer;

[0100] TPU foaming layer: a1. After mixing material A, material B is added according to the mass ratio of material A to material B of 2:1, and then melt-extruded and granulated to obtain the second mixed pellets. The melt blending temperature is 150-180°C, and the melt index of the first mixed pellets is 3g / 10min;

[0101] a2. Add the second mixed pellets into an extruder, melt them, inject supercritical gas (supercritical carbon dioxide, the same below) into the middle section of the extruder, and then blend, extrude, and pelletize them underwater to obtain foamed pellets;

[0102] a3. The foamed particles are subjected to steam molding to obtain a TPU foam layer; wherein the temperature zone of the melting of the second mixed particles is 150-190°C; the injection amount of the supercritical gas is 15% of the total weight of the TPU pad raw material; the temperature of the temperature zone for injecting the supercritical gas is set to 180°C; the injection pressure of the supercritical gas is 15Mpa; the temperature zone of the blending of the injected supercritical gas and the melt of the second mixed particles is set to 150-190°C; the extrusion temperature is 150-190°C; the temperature of the underwater pelletizing is 60°C.

[0103] Adhesive layer: the raw materials of the first polyacrylate layer are mixed, poured into a mold, and cured by ultraviolet light to obtain an adhesive layer;

[0104] Second elastic foaming layer: Add the raw materials of the EVA foaming layer into a mixer, stir and mix at 60°C, and knead at a temperature of 110°C for 5 minutes, then transfer to an extruder to extrude into sheets, and then put the sheets into a mold and hot-press foam in a flat vulcanizer, wherein the hot-press foaming temperature is 170-180°C, the hot-pressing pressure is 8-10MPa, and the hot-pressing time is 10 minutes.

[0105] Gluing layer: The raw materials of the second polyacrylate layer are mixed, poured into a mold, and cured by ultraviolet light to obtain a glue layer.

[0106] 3. Compression molding:

[0107] One side of the glue layer is protected, and the glue layer, the second elastic foam layer, the adhesive layer and the first elastic foam layer are stacked in sequence and molded to obtain a floor mat, wherein the unprotected side of the glue layer contacts the second elastic foam layer.

[0108] Example 6

[0109] Preparation of floor mat: The difference from Example 5 is step 1, and the other steps are the same, wherein the differences are as follows:

[0110] Wear-resistant layer: 100 parts of polyurethane (for example, BASF 1170A), 6 parts of white carbon black, 2 parts of antioxidant 1010, and 1 part of antioxidant 168;

[0111] TPU foaming layer: Material A: includes the following raw materials in parts by weight: 45 parts of polyester polyol (hydroxyl value mgKOH / g: 53-69, acid value mgKOH / g: ≤3.0, viscosity mPa·s / 25℃: 1800, the same below), 55 parts of polyether polyol (hydroxyl value mgKOH / g: 53-59, molecular weight: 2700-3300, acid value mgKOH / g: ≤0.5, the same below), 8 parts of 1,6-hexanediol, 2 parts of dioctyltin dilaurate, 3 parts of trimethylolpropane, 2 parts of calcium carbonate; Material B is hexamethylene diisocyanate;

[0112] Adhesive layer: First polyacrylate layer: prepare polyacrylate monomer (mixed with methyl acrylate and hydroxyethyl acrylate in a mass ratio of 2.5:1), polyethylene glycol (mixed with polyethylene glycol 1000 and polyethylene glycol 600 in a mass ratio of 1.5:1), water in a mass ratio of 10:2:30, and prepare dibenzoyl peroxide at 2% by mass of the polyacrylate monomer;

[0113] The second elastic foam layer: an EVA foam layer, comprising the following raw materials in parts by weight: 100 parts of EVA, 2 parts of isobutylene maleic anhydride polymer, and 2 parts of AC-6000;

[0114] Adhesive layer: The second polyacrylate layer: 80 parts of polyacrylate emulsion (solid content is 40%), 20 parts of styrene acrylic emulsion (solid content is 45%), 4 parts of ammonia water, 7 parts of polyethylene glycol, and 16 parts of white carbon black.

[0115] Embodiment 7:

[0116] Preparation of floor mat: The difference from Example 5 is that the raw materials of the TPU foam layer and the second elastic foam layer in step 1 are different, and the other steps are the same, among which the differences are as follows:

[0117] TPU foaming layer: Material A: includes the following raw materials by weight: 55 parts of polyester polyol, 45 parts of polyether polyol, 12 parts of 1,6-hexanediol, 4 parts of dioctyltin dilaurate, 5 parts of trimethylolpropane, and 3 parts of calcium carbonate; Material B is hexamethylene diisocyanate;

[0118] The second elastic foam layer: an EVA foam layer, comprising the following raw materials in parts by weight: 100 parts of EVA, 4 parts of isobutylene maleic anhydride polymer, and 4.5 parts of AC-6000;

[0119] Example 8

[0120] Preparation of floor mats:

[0121] 1. Prepare the raw materials:

[0122] Wear-resistant layer: the same material as the wear-resistant layer in Example 5;

[0123] TPEE foaming layer: prepare TPEE base material (exemplarily DuPont HTR8782, USA, the same below), first crosslinking agent (isobutylene maleic anhydride polymer), and first nucleating agent (calcium carbonate) in a mass ratio of 100:1:1;

[0124] Adhesive layer: the material is the same as that of the adhesive layer in Example 5;

[0125] The second elastic foam layer: an EVA foam layer, comprising the following raw materials in parts by weight: 100 parts of EVA (DuPont 660, USA, the same below), 1 part of isobutylene maleic anhydride polymer, and 0.5 parts of AC-6000;

[0126] Gluing layer: The raw material of the glueing layer is the same as that of the glueing layer in Example 5.

[0127] 2. Preparation of each layer:

[0128] Wear-resistant layer: Preparation of the wear-resistant layer is the same as that in Example 5;

[0129] TPEE foaming layer: a1. After mixing the TPEE base material, the first cross-linking agent and the first nucleating agent, the mixture is melt-blended and granulated to obtain first mixed particles. The melt-blending temperature is 150-175° C., and the melt index of the first mixed particles is 6 g / 10 min.

[0130] a2. Add the first mixed pellets into an extruder, melt them, inject supercritical gas into the middle section of the extruder, and then blend, extrude, and pelletize them underwater to obtain foamed pellets;

[0131] a3. The foamed particles are subjected to steam molding to obtain a TPEE foam layer, wherein the temperature zone of the melting of the first mixed particles is 150-190°C; the temperature of the temperature zone for injecting supercritical gas is set to 180-200°C; the injection pressure of the supercritical gas is 20Mpa; the injection amount of the supercritical gas is 25% of the total weight of the TPEE pad raw material; the temperature zone of the blending of the injected supercritical gas and the melt of the first mixed particles is set to 150-190°C; the extrusion temperature is 150-190°C; and the temperature of the underwater pelletizing is 60°C.

[0132] Adhesive layer: prepared in the same manner as the adhesive layer in Example 5;

[0133] Second elastic foaming layer: Add the raw materials of the EVA foaming layer into a mixer, stir and mix at 60°C, and knead at 120°C for 5 minutes, then transfer to an extruder to extrude into sheets, and then put the sheets into a mold and hot-press foam in a flat vulcanizer, wherein the hot-press foaming temperature is 170-180°C, the hot-pressing pressure is 8-10MPa, and the hot-pressing time is 10 minutes.

[0134] Gluing layer: prepared in the same manner as the glueing layer in Example 5.

[0135] 3. Compression molding:

[0136] One side of the glue layer is protected, and the glue layer, the second elastic foam layer, the adhesive layer and the first elastic foam layer are stacked in sequence and molded to obtain a floor mat, wherein the unprotected side of the glue layer contacts the second elastic foam layer.

[0137] Example 9

[0138] Preparation of floor mat: The difference from Example 8 is that the raw materials of the TPEE foaming layer and the second elastic foaming layer in step 1 are different, and the other steps are the same, among which the differences are as follows:

[0139] TPEE foaming layer: prepare TPEE base material, first crosslinking agent (isobutylene maleic anhydride polymer), and first nucleating agent (calcium carbonate) in a mass ratio of 100:2:2;

[0140] The second elastic foam layer: an EVA foam layer, comprising the following raw materials in parts by weight: 100 parts of EVA, 2 parts of isobutylene maleic anhydride polymer, and 2.5 parts of AC-6000.

[0141] Example 10

[0142] Preparation of floor mat: The difference from Example 8 is that the raw materials of the TPEE foaming layer and the second elastic foaming layer in step 1 are different, and the other steps are the same, among which the differences are as follows:

[0143] TPEE foaming layer: prepare TPEE base material, first crosslinking agent (isobutylene maleic anhydride polymer), and first nucleating agent (calcium carbonate) in a mass ratio of 100:4:4;

[0144] The second elastic foam layer: an EVA foam layer, comprising the following raw materials in parts by weight: 100 parts of EVA, 4 parts of isobutylene maleic anhydride polymer, and 4.5 parts of AC-6000.

[0145] Embodiment 11

[0146] Preparation of floor mats:

[0147] 1. Prepare the raw materials:

[0148] Wear-resistant layer: the same material as the wear-resistant layer in Example 5;

[0149] TPU foaming layer: Material A: the same as component A in Example 5; prepare 10% by mass of the modified polyacrylate polymer prepared in Example 3;

[0150] Adhesive layer: the material is the same as that of the adhesive layer in Example 5;

[0151] Second elastic foam layer: made of the same material as the second elastic foam layer in Example 5;

[0152] Gluing layer: the material is the same as that of the glue layer in Example 5;

[0153] 2. Preparation of each layer:

[0154] Wear-resistant layer: Preparation of the wear-resistant layer is the same as that in Example 5;

[0155] Corrosion-resistant TPU foaming layer: a1. After mixing material A and modified polyacrylate polymer, material B is added according to the mass ratio of material A to material B of 2.5:1, and then melt-extruded and granulated to obtain second mixed particles. The temperature of melt blending is 150-180° C., and the melt index of the first mixed particles is 5 g / 10 min.

[0156] a2. Add the second mixed pellets into an extruder, melt them, inject supercritical gas into the middle section of the extruder, and then blend, extrude, and pelletize them underwater to obtain foamed pellets;

[0157] a3. The foamed particles are subjected to steam molding to obtain a TPU foam layer; wherein the temperature zone of the melting of the second mixed particles is 150-190°C; the temperature of the temperature zone for injecting supercritical gas is set to 180-200°C; the injection pressure of the supercritical gas is 30Mpa; the temperature zone of the blending of the injected supercritical gas and the melt of the second mixed particles is set to 150-190°C; the extrusion temperature is 150-190°C; and the temperature of the underwater pelletizing is 60°C.

[0158] Adhesive layer: Preparation of the adhesive layer in the same manner as in Example 5;

[0159] Second elastic foam layer: the preparation steps of the second elastic foam layer are the same as those in step 5.

[0160] Glue layer: Preparation of the glue layer is the same as that in Example 5.

[0161] 3. Compression molding:

[0162] One side of the glue layer is protected, and the glue layer, the second elastic foam layer, the adhesive layer and the first elastic foam layer are stacked in sequence and molded to obtain a floor mat, wherein the unprotected side of the glue layer contacts the second elastic foam layer.

[0163] Example 12

[0164] Preparation of floor mat: Compared with Example 11, the modified polyacrylate polymer was replaced with the modified polyacrylate polymer prepared in Example 4 in equal parts, and the rest was the same.

[0165] Embodiment 13

[0166] Preparation of floor mat: Compared with Example 11, the amount of modified polyacrylate polymer added was replaced with 18% of the mass of material A, and the rest was the same.

[0167] Embodiment 14

[0168] Preparation of floor mats:

[0169] 1. Prepare the raw materials:

[0170] Wear-resistant layer: the same material as the wear-resistant layer in Example 5;

[0171] Corrosion-resistant TPEE foaming layer: prepare TPEE base material, a first crosslinking agent (isobutylene maleic anhydride polymer) and a first nucleating agent (calcium carbonate) in a mass ratio of 100:3:3; prepare 5% of the mass of the TPEE base material of the modified polyacrylate polymer prepared in Example 3;

[0172] Adhesive layer: the same material as the adhesive layer in Example 5;

[0173] The second elastic foam layer: an EVA foam layer, comprising the following raw materials in parts by weight: 100 parts of EVA, 2 parts of isobutylene maleic anhydride polymer, and 2 parts of AC-6000;

[0174] Glue layer: the same material as the glue layer in Example 5;

[0175] 2. Preparation of each layer:

[0176] Wear-resistant layer: Preparation of the wear-resistant layer is the same as that in Example 5;

[0177] TPEE foaming layer: a1. After mixing the TPEE base material, the first crosslinking agent, the first nucleating agent and the modified polyacrylate polymer, the mixture is melt-blended and granulated to obtain first mixed particles. The melt-blending temperature is 150-175° C., and the melt index of the first mixed particles is 6 g / 10 min.

[0178] a2. Add the first mixed pellets into an extruder, melt them, inject supercritical gas into the middle section of the extruder, and then blend, extrude, and pelletize them underwater to obtain foamed pellets;

[0179] a3. The foamed particles are subjected to steam molding to obtain a TPEE foam layer, wherein the temperature zone of the melting of the first mixed particles is 150-190°C; the temperature of the temperature zone for injecting supercritical gas is set to 180-200°C; the injection pressure of the supercritical gas is 20 MPa; the temperature zone of the blending of the injected supercritical gas and the melt of the first mixed particles is set to 150-190°C; the extrusion temperature is 150-190°C; and the temperature of the underwater pelletizing is 40°C.

[0180] Adhesive layer: Preparation of the adhesive layer in the same manner as in Example 5;

[0181] Second elastic foaming layer: Add the raw materials of the EVA foaming layer into a mixer, stir and mix at 60°C, and knead at 120°C for 5 minutes, then transfer to an extruder to extrude into sheets, put the sheets into a mold, and hot-press and foam in a flat vulcanizer, wherein the hot-pressing foaming temperature is 170-180°C, the hot-pressing pressure is 8-10MPa, and the hot-pressing time is 8-10min.

[0182] Gluing layer: Preparation of the glueing layer is the same as that in Example 5.

[0183] 3. Compression molding:

[0184] One side of the glue layer is protected, and the glue layer, the second elastic foam layer, the adhesive layer and the first elastic foam layer are stacked in sequence and molded to obtain a floor mat, wherein the unprotected side of the glue layer contacts the second elastic foam layer.

[0185] Embodiment 15

[0186] Preparation of floor mat: Compared with Example 14, an equal amount of the modified polyacrylate polymer was replaced with the modified polyacrylate polymer prepared in Example 4, and the rest was the same.

[0187] Example 16

[0188] Preparation of floor mat: Compared with Example 14, the addition amount of modified polyacrylate polymer was changed to 15% of the mass of TPEE base material.

[0189] According to the preparation steps in Example 5, comparative examples 1-2 with different thicknesses were prepared.

[0190] Comparative Example 3

[0191] Preparation of floor mat: Compared with Example 5, the difference lies in the foaming process of the TPU foaming layer, the injection pressure of the supercritical gas is 10 MPa, and the rest is the same.

[0192] Comparative Example 4

[0193] Preparation of floor mat: Compared with Example 5, the difference lies in the foaming process of the TPU foaming layer, the injection amount of the supercritical gas is 5% of the total weight of the TPU mat raw material, and the rest is the same.

[0194] Comparative Example 5

[0195] Preparation of floor mat: Compared with Example 5, the difference is the hot pressing process of the second elastic foam layer: hot pressing foaming temperature 150-160°C, hot pressing pressure 4MPa, hot pressing time 10min, the rest is the same

[0196] Comparative Example 6

[0197] Preparation of floor mat: Compared with Example 11, the modified polyacrylate polymer is replaced with a polyacrylate polymer in equal parts, and the rest is the same. The preparation of the polyacrylate polymer includes:

[0198] After 50g of hydroxyethyl acrylate, 1.5g of fatty alcohol polyoxyethylene ether and 120g of water are mixed evenly, 10g of initiator solution (the initiator solution is formed by mixing 2g of ammonium persulfate and 30g of water) is added dropwise under a nitrogen atmosphere at 70°C. After the addition is complete, the mixture is kept warm and stirred for 1.5h. The mixture is cooled to room temperature, 25g of acrylic acid is added and stirred evenly. The mixture is heated to 80°C under nitrogen and the pH value of the emulsion is adjusted to between 8.5 and 9.5. The remaining 20g of the initiator solution is added dropwise under a nitrogen atmosphere. After the addition is complete, the mixture is stirred for 6h. The mixture is cooled, demulsified, dried and washed to obtain a polyacrylate polymer.

[0199] The thickness of each layer in the above-mentioned Embodiment 5, Embodiment 8, Embodiment 11 and Embodiment 14 is the same, specifically:

[0200] The thickness of the wear-resistant layer is 1mm;

[0201] The thickness of the first elastic foam layer (or the corrosion-resistant first elastic foam layer) is 1.5 mm;

[0202] The thickness of the adhesive layer is 4.5 mm;

[0203] The thickness of the second elastic foam layer is 2.5 mm;

[0204] The thickness of the glue layer is 2.5 mm.

[0205] The thickness and density of each layer in Examples 12-13 are the same as those in Example 11, and the thickness and density of each layer in Examples 15-16 are the same as those in Example 14.

[0206] The thickness of each layer in the above-mentioned Embodiment 6 and Embodiment 9 is the same, specifically:

[0207] The thickness of the wear-resistant layer is 1mm;

[0208] The thickness of the first elastic foam layer is 2 mm;

[0209] The thickness of the adhesive layer is 5 mm;

[0210] The thickness of the second elastic foam layer is 3 mm;

[0211] The thickness of the glue layer is 2 mm.

[0212] The thickness of each layer in the above-mentioned embodiment 7 and embodiment 10 is the same, specifically:

[0213] The thickness of the wear-resistant layer is 1mm;

[0214] The thickness of the first elastic foam layer is 2.5 mm;

[0215] The thickness of the adhesive layer is 4.5 mm;

[0216] The thickness of the second elastic foam layer is 3 mm;

[0217] The thickness of the glue layer is 3mm.

[0218] Comparative Example 1: The thickness of each layer is: the thickness of the wear-resistant layer is 1 mm, the thickness of the first elastic foam layer is 1 mm, the thickness of the adhesive layer is 4.5 mm, the thickness of the second elastic foam layer is 2.5 mm, and the thickness of the glue layer is 2.5 mm;

[0219] The thickness of each layer of Comparative Example 2 is: the thickness of the wear-resistant layer is 1 mm, the thickness of the first elastic foam layer is 1.5 mm; the thickness of the adhesive layer is 4.5 mm; the thickness of the second elastic foam layer is 1 mm; the thickness of the adhesive layer is 2.5 mm;

[0220] The thickness of each layer in Comparative Examples 3 and 4 is the same as that in Example 5;

[0221] The thickness of each layer in Comparative Example 5 is the same as that in Example 5;

[0222] The thickness of each layer of Comparative Example 6 is the same as that of Example 11.

[0223] The floor mats of Examples 5-16 and Comparative Examples 1-6 were subjected to a rebound force test, and the test results are shown in Table 1. Drop ball rebound experiment: At the same fixed height, a pickle ball free fall test was performed to test the ratio of the pickle ball rebound height to the fixed height (i.e., the drop ball rebound rate). The pickle ball free fall test was repeated 5 times, and the drop ball rebound rate was averaged.

[0224] Table 1

[0225]

[0226]

[0227] It can be seen from the data in Table 2 that the floor mats obtained in Examples 1-16 have excellent rebound performance.

[0228] The corrosion resistance of Example 5, Example 8, Example 11, Example 14 and Comparative Example 6 was tested, and the results are shown in Table 2.

[0229] Table 2

[0230]

[0231]

[0232] It can be seen from the data in Table 2 that the floor mats of Example 11 and Example 14 have good corrosion resistance.

[0233] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0234] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A pickleball court mat, characterized in that: It comprises a wear-resistant layer, a first elastic foam layer, an adhesive layer, a second elastic foam layer and a gluing layer in sequence, and the gluing layer contacts the ground.

2. A pickleball court mat according to claim 1, characterized in that: The thickness of the wear-resistant layer is 1-1.5 mm, the thickness of the first elastic foam layer is 1.5-2.5 mm, the thickness of the adhesive layer is 4.5-5.5 mm, the thickness of the second elastic foam layer is 2.5-3.5 mm, and the total thickness of the floor mat is 10-15 mm.

3. A pickleball court mat according to claim 1, characterized in that: The density of the wear-resistant layer is 0.9-1.1 g / cm 3 The density of the first elastic foam layer is 0.08-0.20 g / cm 3 The density of the adhesive layer is 0.30-0.50 g / cm 3 The density of the second elastic foam layer is 0.20-0.40 g / cm 3 The density of the adhesive layer is 0.90-1.60 g / cm 3 .

4. A pickleball court mat according to claim 1, characterized in that: The wear-resistant layer is a polyurethane layer; The first elastic foaming layer is a TPEE foaming layer or a TPU foaming layer; The TPEE foaming layer is made of TPEE base material, a first cross-linking agent and a first nucleating agent through blending and supercritical foaming; The TPU foaming layer is made by mixing material A and material B and then subjecting them to supercritical foaming; The adhesive layer is a first polyacrylate layer; The second elastic foam layer is an EVA foam layer; The adhesive layer is a second polyacrylate layer.

5. A pickleball court mat according to claim 4, characterized in that: The first elastic foam layer is a corrosion-resistant TPEE foam layer or a corrosion-resistant TPU foam layer; The corrosion-resistant TPEE foaming layer is made of TPEE base material, a first cross-linking agent, a first nucleating agent and a modified polyacrylate polymer through blending and supercritical foaming; The corrosion-resistant TPU foaming layer is prepared by mixing material A, material B and modified polyacrylate polymer and then subjecting them to supercritical foaming.

6. A pickleball court mat according to claim 5, characterized in that: The modified polyacrylate polymer is prepared by emulsion polymerization of acrylic acid, hydroxyethyl acrylate and corrosion-resistant olefin monomers.

7. A pickleball court mat according to claim 6, characterized in that: The modified polyacrylate is prepared by emulsion polymerization of acrylic acid, hydroxyethyl acrylate and corrosion-resistant olefin monomers.

8. A pickleball court mat according to claim 7, characterized in that: The corrosion-resistant olefin monomer is obtained by activating isobornyl acrylamide in an organic solvent under the action of sodium hydride and then reacting it with Y-chloropropyltrimethoxysilane in an organic solvent to undergo a substitution reaction.

9. A pickleball court mat according to claim 8, characterized in that: The activation reaction temperature is 40-55° C. and the time is 1-3 hours.

10. A method for preparing a pickleball court mat according to any one of claims 1 to 9, characterized in that: include: preparing a first elastic foaming layer; preparing an adhesive layer; preparing a second elastic foam layer; preparing a glue layer; One side of the glue layer is protected, and the glue layer, the second elastic foam layer, the adhesive layer and the first elastic foam layer are stacked in sequence and molded to obtain a floor mat, wherein the unprotected side of the glue layer contacts the second elastic foam layer.

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