A ground mat for a pitch and a method of making the same

Abstract

The present application relates to a kind of ground mat for pitch court and its preparation method, belong to plastic ground mat preparation technical field, ground mat includes abrasion-resistant layer, first elastic foaming layer, adhesive layer, second elastic foaming layer and glue layer in turn, glue layer is contacted with ground.The present application is mutually matched between the thickness, density between each level, so that ground mat meets the requirement of pitch court to the resilience of ground mat, and abrasion-resistant layer: thickness is 1-1.5mm, density is 0.1-1.1g / cm 3 ;First elastic foaming layer: thickness is 1.5-2.5mm, density is 0.08-0.20g / cm 3 ;Adhesive layer: thickness is 4.5-5.5mm, density is 0.30-0.50g / cm 3 ;Second elastic foaming layer: thickness is 2.5-3.5mm, 0.08-0.20g / cm 3 ;Glue layer: density is 0.90-1.60g / cm 3 ， The total thickness of ground mat is 10-15mm.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of plastic floor mat preparation, and particularly relates to a floor mat for a pitch and a preparation method thereof. BACKGROUND

[0002] The floor mat for a pitch in the prior art is generally a plastic floor mat, which is generally made of polyvinyl chloride (PVC) material or high foaming polyethylene (PE) material. The floor mat has general resilience and can meet the elastic requirements of ordinary ball games (such as basketball and football), but cannot meet the requirements of the pitch for the resilience of the floor mat.

[0003] Therefore, it is necessary to provide a pitch floor mat with high resilience and a preparation method thereof. SUMMARY

[0004] The present application aims to provide a pitch floor mat and a preparation method thereof.

[0005] The technical problem to be solved by the present application is to solve the problem that the resilience of the existing floor mat cannot meet the requirements of the pitch.

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

[0007] A pitch floor mat sequentially comprises a first elastic foaming layer, a bonding layer, a second elastic foaming layer and a glue layer, and the glue layer is in contact with the ground.

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

[0009] Further, the density of the wear-resistant layer is 0.9-1.1 g / cm 3 , the density of the first elastic foaming layer is 0.08-0.20 g / cm 3 , the density of the bonding layer is 0.30-0.50 g / cm 3 , the density of the second elastic foaming layer is 0.20-0.40 g / cm 3 , and the density of the glue layer is 0.90-1.60 g / cm 3 .

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

[0011] Further, the first elastic foaming layer is a TPEE foaming layer or a TPU foaming layer.

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

[0013] Further, the second elastic foamed layer is an EVA foamed layer.

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

[0015] Further, the TPEE foamed layer is prepared by blending, supercritical foaming of a TPEE base material, a first crosslinking agent and a first nucleating agent.

[0016] Further, the first crosslinking agent is a mixture of one or both of isobutylene maleic anhydride polymer and styrene maleic anhydride polymer in any ratio.

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

[0018] Further, the preparation of the TPEE foamed layer comprises:

[0019] After mixing the TPEE base material, the first crosslinking agent and the first nucleating agent, melt blending is performed to obtain granulation, and a first mixed granule is obtained, the temperature of the melt blending is 150-175℃, and the melt index of the first mixed granule is 2-6g / 10min;

[0020] The first mixed granule is added to an extruder, and then melt blending, extrusion and underwater cutting are performed to obtain a foamed granule.

[0021] The foamed granule is molded by steam molding to obtain the TPEE foamed layer.

[0022] Further, the temperature of the melt zone of the first mixed granule is 150-190℃.

[0023] Further, the temperature of the melt zone of the melt blending is set to 150-190℃.

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

[0025] Further, the injection pressure of the supercritical gas is 15-30Mpa.

[0026] Further, the temperature of the melt zone of the melt blending is set to 150-190℃.

[0027] Further, the extrusion temperature is 150-190℃.

[0028] Further, the temperature of the underwater cutting is 40-80℃.

[0029] Further, the TPU foaming layer is prepared by mixing A material and B material according to mass ratio 1.8-2.8:1, and then supercritical foaming.

[0030] The A material comprises the following raw materials 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 crosslinking agent, and 1-3 parts of second nucleating agent.

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

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

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

[0034] Further, the second crosslinking agent is one of trimethylolpropane and castor oil.

[0035] Further, the preparation of the TPU foaming layer comprises:

[0036] After mixing the A material, the B material is added, and then melt extrusion and granulation are performed to obtain second mixed particles, and the temperature of melt blending is 150-180℃, and the melt index of the first mixed particles is 1-5g / 10min.

[0037] The second mixed particles are added to an extruder, melt blended, and then supercritical gas is injected into the middle section of the extruder, followed by blending, extrusion, and underwater cutting to obtain foaming particles.

[0038] The foaming particles are molded into TPU foaming layer by steam molding.

[0039] Further, the temperature of the melt of the second mixed particles is 150-190℃.

[0040] Further, the temperature of the injection of the supercritical gas is set to 180-200℃.

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

[0042] Further, the injection pressure of the supercritical gas is 15-30Mpa.

[0043] Further, the temperature of the blending of the injected supercritical gas and the melt of the second mixed particles is set to 150-190℃.

[0044] Further, the extrusion temperature is 150-190℃.

[0045] Further, the underwater pelletizing temperature is 40-80℃.

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

[0047] Further, the first elastic foaming layer is a corrosion-resistant TPEE foaming layer or a corrosion-resistant TPU foaming layer.

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

[0049] The corrosion-resistant TPEE foaming layer is made by melt blending foaming of TPEE base material, first crosslinking agent, first nucleating agent, first foaming agent and modified polyacrylate polymer; 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 of A material, B material and modified polyacrylate polymer; the mass ratio of the modified polyacrylate polymer to the A material is 1-2.5:10.

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

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

[0053] Further, the emulsion polymerization reaction comprises:

[0054] After mixing hydroxyethyl acrylate, corrosion-resistant olefin monomer, emulsifier and water uniformly, a part of initiator solution is added dropwise under nitrogen atmosphere at the pre-polymerization first stage temperature, after dropwise addition is completed, continue to stir for 1.5-2h, cool to room temperature, add acrylic acid, stir uniformly, heat to the pre-polymerization second stage temperature under nitrogen, and adjust the pH value of the emulsion to 8.5-9.5, dropwise add the remaining initiator solution under nitrogen atmosphere at the pre-polymerization second stage temperature, after dropwise addition is completed, stir for 5-8h, cool, demulsify, dry, wash, and obtain the modified polyacrylate polymer.

[0055] Further, the pre-polymerization first stage temperature is 70-80℃.

[0056] Further, the pre-polymerization second stage temperature is 75-85℃.

[0057] Further, one of the fatty alcohol polyoxyethylene ether, sodium dodecylbenzenesulfonate.

[0058] In the present application, the modified polyacrylate is introduced into the elastic raw material, on the one hand, the peeling force of the first elastic foaming layer and the adhesive layer is improved, the durability of the floor mat is improved, on the other hand, the corrosion-resistant olefin monomer with siloxane branch is introduced, so that the first elastic foaming layer has excellent corrosion resistance (water resistance, salt resistance and chemical solvent resistance), so as to improve the obtained floor mat not only suitable for indoor tennis court, but also suitable for outdoor tennis court.

[0059] Further, the corrosion-resistant olefin monomer is obtained by activating isobornyl acrylamide in an organic solvent by sodium hydride, and then substituting Y-chloropropyl trimethoxysilane in an organic solvent.

[0060] Further, the reaction temperature of the activation is 40-55℃, and the time is 1-3h.

[0061] Further, the molecular structure of the corrosion-resistant olefin monomer is as follows.

[0062]

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

[0064] Further, the first polyacrylate layer and the second polyacrylate layer can be the same or different, which is made of polyacrylate emulsion curing, which is well known in the art, and will not be described here.

[0065] Further, the EVA foaming layer comprises the following raw materials by weight: EVA 100 parts, third crosslinking agent 1-4 parts, first foaming agent 0.5-4.5 parts.

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

[0067] Further, the first foaming agent is one of the AC class foaming agent.

[0068] Further, in a more specific embodiment of the present application, the raw materials of each layer of the floor mat further comprise pigments and / or antioxidants and / or ultraviolet resistant agents, so as to facilitate coloring, antioxidant enhancement modification, and ultraviolet resistance performance enhancement of each layer of the floor mat. In the present application, the types of pigments, antioxidants, and ultraviolet resistant agents are not specifically limited.

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

[0070] A preparation method of a floor mat for a Pickleball court comprises:

[0071] Preparation of a first elastic foaming layer; preparation of an adhesive layer; preparation of a second elastic foaming layer; preparation of a glue layer;

[0072] One side of the glue layer is protected, and the glue layer, the second elastic foaming layer, the adhesive layer, and the first elastic foaming layer are sequentially stacked and molded to obtain the floor mat, wherein the unprotected side of the glue layer is in contact with the second elastic foaming layer.

[0073] The present application has the following beneficial effects:

[0074] To solve the problems in the background art and take into account the production cost of the floor mat, the present application provides a floor mat with a multi-layer structure (including a wear-resistant layer, a first elastic foaming layer, an adhesive layer, a second elastic foaming layer, and a glue layer in sequence, and the glue layer is in contact with the ground), which meets the requirements of the Pickleball court for the resilience of the floor mat through the cooperation between the thickness and density of each layer. In the floor mat, the thickness of the wear-resistant layer is 1-1.5 mm, the thickness of the first elastic foaming 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 foaming layer is 2.5-3.5 mm, the total thickness of the floor mat is 10-15 mm, the density of the wear-resistant layer is 0.9-1.1 g / cm 3 , the density of the first elastic foaming 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 foaming layer is 0.20-0.40 g / cm 3 , and the density of the glue layer is 0.90-1.60 g / cm 3 .

[0075] In addition, to improve the peelability between the first elastic foaming layer and the adhesive layer and prolong the service life of the floor mat, the present application introduces modified polyacrylate into the first elastic foaming layer. The modified polyacrylate has good adhesion, and the siloxane branches therein can improve the peelability between the first elastic foaming layer and the adhesive layer, and improve the corrosion resistance of the first elastic foaming layer. DETAILED DESCRIPTION

[0076] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0077] Embodiment 1

[0078] Preparation of the corrosion-resistant olefin monomer:

[0079] After 0.1 mol of isobornyl acrylamide and 100 mL of N, N-dimethylformamide were mixed, 0.1 mol of sodium hydride was added, heated to 40℃, and stirred for 3 h. Then, 0.1 mol of Y-chloropropyl trimethoxysilane was added, and heated to 75℃, and stirred for 24 h. Subsequently, the reaction solution was cooled to room temperature, poured into ethyl acetate, washed with deionized water and saturated brine, and distilled under reduced pressure to obtain the corrosion-resistant olefin monomer.

[0080] Embodiment 2

[0081] Preparation of the corrosion-resistant olefin monomer:

[0082] After 0.1 mol of isobornyl acrylamide and 100 mL of N, N-dimethylformamide were mixed, 0.1 mol of sodium hydride was added, heated to 40℃, and stirred for 3 h. Then, 0.1 mol of Y-chloropropyl trimethoxysilane was added, and heated to 75℃, and stirred for 24 h. Subsequently, the reaction solution was cooled to room temperature, poured into ethyl acetate, washed with deionized water and saturated brine, and distilled under reduced pressure to obtain the corrosion-resistant olefin monomer.

[0083] Embodiment 3

[0084] Preparation of the modified polyacrylate polymer:

[0085] After 50 g of hydroxyethyl acrylate, 25 g of the corrosion-resistant olefin monomer prepared in Embodiment 1, 1.5 g of fatty alcohol polyoxyethylene ether, and 120 g of water were uniformly mixed, 10 g of initiator solution (the initiator solution was formed by mixing 2 g of ammonium persulfate and 30 g of water) was added dropwise under a nitrogen atmosphere at 70℃. After the dropwise addition was completed, the solution was continuously stirred for 1.5 h at the same temperature. Then, the solution was cooled to room temperature, 25 g of acrylic acid was added and stirred uniformly, heated to 80℃ under a nitrogen atmosphere, and the pH value of the emulsion was adjusted to 8.5-9.5. Then, the remaining 20 g of initiator solution was added dropwise under a nitrogen atmosphere. After the dropwise addition was completed, the solution was continuously stirred for 6 h. Then, the solution was cooled, broken, dried, and washed to obtain the modified polyacrylate polymer.

[0086] Embodiment 4

[0087] Preparation of modified polyacrylate polymer:

[0088] After 70 g of hydroxyethyl acrylate, 15 g of corrosion-resistant olefin monomer prepared in Example 2, 3 g of sodium dodecyl benzene sulfonate and 120 g of water were mixed uniformly, 10 g of initiator solution (the initiator solution was formed by mixing 2.5 g of potassium persulfate and 30 g of water) was added dropwise under nitrogen atmosphere at 80°C, after the dropwise addition was completed, the temperature was kept and stirring was continued for 2 h, it was cooled to room temperature, 15 g of acrylic acid was added, stirred uniformly, heated to °C under nitrogen, and the pH value of the emulsion was adjusted to be between 8.5-9.5, 20 g of the remaining initiator solution was added dropwise under nitrogen atmosphere, after the dropwise addition was completed, stirring was continued for 8 h, it was cooled, broken emulsion, dried, washed, and the modified polyacrylate polymer was obtained.

[0089] Example 5

[0090] Preparation of the ground mat:

[0091] I. Preparation of 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: A material: including 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, 1 part of calcium carbonate; B material is hexamethylene diisocyanate;

[0094] Adhesive layer: first polyacrylate layer: prepare polyacrylate monomer (consisting of methyl acrylate and hydroxyethyl acrylate in a mass ratio of 2:1), polyethylene glycol (consisting of polyethylene glycol 1000 and polyethylene glycol 600 in a mass ratio of 1:1) and water in a mass ratio of 10:1:30, and prepare 2% of the polyacrylate monomer by mass of dibenzoyl peroxide;

[0095] Second elastic foaming layer: EVA foaming layer, including the following raw materials by weight: EVA 100 parts, isobutylene maleic anhydride polymer 1 part, AC-6000 0.5 parts;

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

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

[0098] II. Preparation of each layer:

[0099] Wear-resistant layer: After mixing the wear-resistant layer raw materials, melt extrusion and molding are performed to form a thin layer;

[0100] TPU foaming layer: a1, after mixing the A material, B material is added in a mass ratio of 2:1 of A material to B material, and then melt extrusion and granulation are performed to obtain second mixed particles, the melt blending temperature is 150-180℃, and the melt index of the first mixed particles is 3g / 10min;

[0101] a2, the second mixed particles are added to the extruder, melt in the middle section of the extruder, inject supercritical gas (supercritical carbon dioxide, same below), and then blend, extrude, and underwater pelletize to obtain foaming particles;

[0102] a3, the foaming particles are molded by steam molding to obtain a TPU foaming layer; wherein the melt temperature of the second mixed particles is 150-190℃; the injection amount of the supercritical gas is 15% of the total weight of the TPU pad raw materials; the temperature of the injection supercritical gas is set to 180℃; the injection pressure of the supercritical gas is 15Mpa; the blending temperature of the injection supercritical gas and the melt of the second mixed particles is set to 150-190℃; the extrusion temperature is 150-190℃; and the underwater pelletizing temperature is 60℃.

[0103] Adhesive layer: After mixing the raw materials of the first polyacrylate layer, pour into the mold, and then ultraviolet curing is performed to obtain an adhesive layer;

[0104] Second elastic foaming layer: the raw materials of the EVA foaming layer are added to the mixer, stirred and mixed at 60℃, and then mixed at a temperature of 110℃ for 5min, and then transferred to the extruder to extrude into a sheet material, and then placed into the mold and hot-pressed and foamed in the flat vulcanizing machine, wherein the hot-pressing temperature is 170-180℃, the hot-pressing pressure is 8-10MPa, and the hot-pressing time is 10min.

[0105] Gluing layer: After mixing the raw materials of the second polyacrylate layer, pour into the mold, and then ultraviolet curing is performed to obtain a gluing layer.

[0106] III. Molding:

[0107] The one side of the adhesive layer is protected, the adhesive layer, the second elastic foaming layer, the adhesive layer and the first elastic foaming layer are stacked in turn, and the ground mat is obtained by molding, wherein the unprotected side of the adhesive layer is in contact with the second elastic foaming layer.

[0108] Example 6

[0109] Preparation of the ground mat: the difference from step one of example 5 is as follows, and the remaining steps are the same:

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

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

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

[0113] Second elastic foaming layer: EVA foaming layer, including the following raw materials by weight: EVA 100 parts, isobutylene maleic anhydride polymer 2 parts, AC-6000 2 parts;

[0114] Adhesive layer: 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, 16 parts of white carbon black.

[0115] Example 7:

[0116] Preparation of the ground mat: the difference from the raw materials of the TPU foaming layer and the second elastic foaming layer in step one of example 5 is as follows, and the remaining steps are the same:

[0117] TPU foamed layer: A material: including 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, 3 parts of calcium carbonate; B material is hexamethylene diisocyanate;

[0118] Second elastic foamed layer: EVA foamed layer, including the following raw materials by weight: EVA 100 parts, isobutylene maleic anhydride polymer 4 parts, AC-6000 4.5 parts;

[0119] Example 8

[0120] Preparation of the ground mat:

[0121] I. Preparation of raw materials:

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

[0123] TPEE foamed layer: TPEE base material (exemplarily, American DuPont HTR8782, the same below), first crosslinking agent (isobutylene maleic anhydride polymer), and first nucleating agent (calcium carbonate) are prepared according to a mass ratio of 100:1:1;

[0124] Adhesive layer: the same as the raw materials of the adhesive layer in Example 5;

[0125] Second elastic foamed layer: EVA foamed layer, including the following raw materials by weight: EVA (American DuPont 660, the same below) 100 parts, isobutylene maleic anhydride polymer 1 part, AC-6000 0.5 parts;

[0126] Gluing layer: the same as the raw materials of the gluing layer in Example 5.

[0127] II. Preparation of each layer:

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

[0129] TPEE foamed layer: a1, after mixing the TPEE base material, the first crosslinking agent and the first nucleating agent, melt blending is carried out to obtain granulation, and the first mixed particles are obtained, the temperature of melt blending is 150-175°C, and the melt index of the first mixed particles is 6g / 10min;

[0130] a2, the first mixed particles are added to the extruder, melt, supercritical gas is injected in the middle section of the extruder, and then blending, extrusion and underwater cutting are carried out to obtain foamed particles;

[0131] a3, the foamed particles are molded by steam molding to obtain the TPEE foamed layer, wherein the temperature of the melting zone of the first mixed particles is 150-190°C; the temperature of the zone where the supercritical gas is injected is set to 180-200°C; the injection pressure of the supercritical gas is 20 MPa; the injection amount of the supercritical gas is 25% of the total weight of the TPEE pad raw material; the temperature of the blending zone 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] The adhesive layer is prepared in the same manner as in Example 5.

[0133] The second elastic foamed layer is prepared by adding the raw materials of the EVA foamed layer into a mixer, stirring and mixing at 60°C, and mixing at a temperature of 120°C for 5 min, and then transferring to an extruder to extrude into a sheet, and then placing the sheet into a mold and hot-pressing and foaming in a flat vulcanizing machine, wherein the hot-pressing temperature is 170-180°C, the hot-pressing pressure is 8-10 MPa, and the hot-pressing time is 10 min.

[0134] The adhesive layer is prepared in the same manner as in Example 5.

[0135] III. Molding:

[0136] The adhesive layer is prepared in the same manner as in Example 5.

[0137] Example 9

[0138] The preparation of the floor mat is the same as in Example 8, except that the raw materials of the TPEE foamed layer and the second elastic foamed layer in Step 1 are different, and the differences are as follows:

[0139] The TPEE foamed layer is prepared by preparing 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 foamed layer is an EVA foamed layer, which includes the following raw materials by weight: EVA 100 parts, isobutylene maleic anhydride polymer 2 parts, and AC-6000 2.5 parts.

[0141] Example 10

[0142] The preparation of the floor mat is the same as in Example 8, except that the raw materials of the TPEE foamed layer and the second elastic foamed layer in Step 1 are different, and the differences are as follows:

[0143] TPEE foamed layer: TPEE base material, first cross-linking agent (isobutylene maleic anhydride polymer), first nucleating agent (calcium carbonate) are prepared according to the mass ratio of 100:4:4;

[0144] Second elastic foamed layer: EVA foamed layer, including the following raw materials by weight: EVA 100 parts, isobutylene maleic anhydride polymer 4 parts, AC-6000 4.5 parts.

[0145] Example 11

[0146] Preparation of the ground mat:

[0147] I. Preparation of raw materials:

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

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

[0150] Adhesive layer: the same as the raw materials of the adhesive layer in Example 5;

[0151] Second elastic foamed layer: the same as the raw materials of the second elastic foamed layer in Example 5;

[0152] Gluing layer: the same as the raw materials of the gluing layer in Example 5;

[0153] II. Preparation of each layer:

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

[0155] Corrosion-resistant TPU foamed layer: a1, after mixing the A material and the modified polyacrylate polymer, B material is added according to the mass ratio of A material to B material 2.5:1, and then melt extrusion, granulation is carried out to obtain second mixed particles, the melt blending temperature is 150-180℃, and the melt index of the first mixed particles is 5g / 10min;

[0156] a2, the second mixed particles are added to the extruder, melted, supercritical gas is injected in the middle of the extruder, and then blended, extruded and underwater cut to obtain foamed particles;

[0157] a3, the foamed particles are molded by steam molding to obtain a TPU foamed layer; wherein the melt temperature of the second mixed particles is 150-190℃; the temperature of the injection of supercritical gas is set to 180-200℃; the injection pressure of the supercritical gas is 30Mpa; the blending temperature of the injected supercritical gas and the melt of the second mixed particles is set to 150-190℃; the extrusion temperature is 150-190℃; and the underwater cutting temperature is 60℃.

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

[0159] Second elastic foamed layer: same as the preparation of the second elastic foamed layer in Step 5.

[0160] Adhesive layer: same as the preparation of the adhesive layer in Example 5;

[0161] III. Molding:

[0162] Protect one side of the adhesive layer, and then stack the adhesive layer, the second elastic foamed layer, the adhesive layer and the first elastic foamed layer in turn, and then mold to obtain the floor mat, wherein the unprotected side of the adhesive layer is in contact with the second elastic foamed layer.

[0163] Example 12

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

[0165] Example 13

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

[0167] Example 14

[0168] Preparation of the floor mat:

[0169] I. Preparation of raw materials:

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

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

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

[0173] Second elastic foamed layer: EVA foamed layer, including the following raw materials in parts by weight: EVA 100 parts, isobutylene maleic anhydride polymer 2 parts, AC-6000 2 parts;

[0174] Adhesive layer: same as the preparation of the adhesive layer in Example 5;

[0175] II. Preparation of each layer:

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

[0177] TPEE foaming layer: a1, after mixing TPEE base material, first crosslinking agent, first nucleating agent and modified polyacrylate polymer, melt blending, granulation, first mixed particles, melt blending temperature is 150-175℃, the melt index of the first mixed particles is 6g / 10min;

[0178] a2, the first mixed particles are added to the extruder, melted, supercritical gas is injected in the middle of the extruder, and then blended, extruded and underwater cut into foaming particles;

[0179] a3, the foaming particles are molded by steam molding to obtain a TPEE foaming layer, wherein the melt temperature of the first mixed particles is 150-190℃; the temperature of the injection supercritical gas is set to 180-200℃; the injection pressure of the supercritical gas is 20Mpa; the blending temperature of the injected supercritical gas and the melt of the first mixed particles is set to 150-190℃; the extrusion temperature is 150-190℃; the underwater cutting temperature is 40℃.

[0180] Adhesive layer: the preparation of the adhesive layer in example 5;

[0181] Second elastic foaming layer: the raw materials of the EVA foaming layer are added to the mixer, stirred and mixed at 60℃, and mixed at a temperature of 120℃ for 5min, then transferred to the extruder to extrude into a sheet material, and then placed in a mold and hot pressed to foam in a flat vulcanizing machine, wherein the hot pressing temperature is 170-180℃, the hot pressing pressure is 8-10MPa, and the hot pressing time is 8-10min.

[0182] Gluing layer: the preparation of the gluing layer in example 5.

[0183] III. Molded:

[0184] The gluing layer is protected on one side, and the gluing layer, the second elastic foaming layer, the adhesive layer and the first elastic foaming layer are stacked in turn, and then molded to obtain a floor mat, wherein the unprotected side of the gluing layer is in contact with the second elastic foaming layer.

[0185] Example 15

[0186] Preparation of floor mat: compared with example 14, the modified polyacrylate polymer is replaced by the modified polyacrylate polymer prepared in example 4 in equal parts, and the rest is the same.

[0187] Example 16

[0188] Preparation of floor mat: compared with example 14, the amount of modified polyacrylate polymer is modified to 15% of the mass of TPEE base material.

[0189] Comparative Example 1-2 was prepared according to the preparation procedure in Example 5, except that the thickness of the TPU foamed layer was different.

[0190] Comparative Example 3

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

[0192] Comparative Example 4

[0193] Preparation of the floor mat: Compared with Example 5, the difference was that the foaming process of the TPU foamed layer was different, the injection amount of the supercritical gas was 5% of the total weight of the TPU pad raw materials, and the rest was the same.

[0194] Comparative Example 5

[0195] Preparation of the floor mat: Compared with Example 5, the difference was that the hot pressing process of the second elastic foamed layer was different: the hot pressing foaming temperature was 150-160℃, the hot pressing pressure was 4 MPa, and the hot pressing time was 10 min, and the rest was the same.

[0196] Comparative Example 6

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

[0198] After 50g of hydroxyethyl acrylate, 1.5g of fatty alcohol polyoxyethylene ether and 120g of water were uniformly mixed, 10g of initiator solution (the initiator solution was formed by mixing 2g of ammonium persulfate and 30g of water) was added dropwise under nitrogen atmosphere at 70℃, after the dropwise addition was completed, the temperature was kept and the stirring was continued for 1.5h, and then cooled to room temperature. 25g of acrylic acid was added and stirred uniformly, heated to 80℃ under nitrogen, and the pH value of the emulsion was adjusted to 8.5-9.5, 20g of the remaining initiator solution was added dropwise under nitrogen atmosphere, after the dropwise addition was completed, the stirring was continued for 6h, and then cooled, broken, dried and washed to obtain the polyacrylate polymer.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[0220] Comparative Example 3 and Comparative Example 4 have the same thickness of each layer as in Example 5.

[0221] Comparative Example 5 has the same thickness of each layer as in Example 5.

[0222] Comparative Example 6 has the same thickness of each layer as in Example 11.

[0223] The resilience test was carried out on the floor mats of Examples 5-16 and Comparative Examples 1-6, and the test results are shown in Table 1. The Pickball free-fall test was carried out at the same fixed height, and the ratio of the Pickball rebound height to the fixed height (i.e. the Pickball rebound rate) was determined. The Pickball free-fall test was repeated 5 times, and the Pickball rebound rate was averaged.

[0224] Table 1

[0225]

[0226]

[0227] As can be seen from the data in Table 2, the floor mats of Examples 1-16 have excellent resilience.

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

[0229] Table 2

[0230]

[0231]

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

[0233] In the description of the specification, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean 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 is only an example and description of the present application, and those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace, as long as they do not deviate from the invention or exceed the scope defined by the present claims, which shall be within the protection scope of the present application.

Claims

1. A ground mat for a petanque court, characterized in that, The wear-resistant layer, the first elastic foaming layer, the adhesive layer, the second elastic foaming layer and the glue layer are sequentially arranged, and the glue layer is in contact with the ground; The thickness of the wear-resistant layer is 1-1.5mm, the thickness of the first elastic foaming layer is 1.5-2.5mm, the thickness of the adhesive layer is 4.5-5.5mm, the thickness of the second elastic foaming layer is 2.5-3.5mm, and the total thickness of the floor mat is 10-13mm; The first elastic foaming layer is a corrosion-resistant TPEE foaming layer or a corrosion-resistant TPU foaming layer; The corrosion-resistant TPEE foaming layer is prepared by blending a TPEE base material, a first crosslinking agent, a first nucleating agent and a modified polyacrylate polymer, and then supercritical foaming; The corrosion-resistant TPU foaming layer is prepared by mixing A material, B material and a modified polyacrylate polymer, and then supercritical foaming; The modified polyacrylate polymer is prepared by emulsion polymerization of acrylic acid, hydroxyethyl acrylate and a corrosion-resistant olefin monomer; The corrosion-resistant olefin monomer is obtained by activating isobornyl acrylamide with sodium hydride in an organic solvent, and then substituting Y-chloropropyl trimethoxysilane in an organic solvent; In the supercritical foaming process of the corrosion-resistant TPU foaming layer, the injection amount of the supercritical gas is 10-45% of the total weight of the TPU pad raw material, and the injection pressure of the supercritical gas is 15-30Mpa; The second elastic foaming layer is an EVA foaming layer; The hot pressing foaming temperature of the EVA foaming layer is 170-180℃, the hot pressing pressure is 8-10MPa, and the hot pressing time is 10min.

2. A ground mat for a petanque court 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 foamed 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 foamed layer is 0.20-0.40 g / cm 3 The density of the glue layer is 0.90-1.60 g / cm 3 .

3. A ground mat for a petanque court according to claim 1, characterized in that The wear-resistant layer is a polyurethane layer; The adhesive layer is a first polyacrylate layer; The glue layer is a second polyacrylate layer.

4. A gaelic football pitch mat according to claim 1, wherein, The activation temperature is 40-55℃, and the time is 1-3h.

5. A method of manufacturing a ground mat for a petanque court according to any one of claims 1 to 4, characterized in that, Comprising: Preparation of the first elastic foaming layer; preparation of the adhesive layer; Preparation of the second elastic foaming layer; Preparation of the glue layer; One side of the glue layer is protected, and the glue layer, the second elastic foaming layer, the adhesive layer and the first elastic foaming layer are sequentially stacked and molded to obtain the floor mat, wherein the unprotected side of the glue layer is in contact with the second elastic foaming layer.

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