Fully-recycled terrace and preparation method thereof

Abstract

The invention belongs to the technical field of artificial turfs, and particularly discloses a fully-recycled elastic terrace and a preparation method thereof.The fully-recycled elastic terrace comprises artificial grass, base cloth, a grass interface coating agent and hot-melt back glue, the artificial grass is fixed to the base cloth through a tufting technology, the back face of the base cloth is coated with the grass interface coating agent, and the hot-melt back glue is coated with the grass interface coating agent; the grass silk interface coating agent, the artificial grass silk and the base cloth are subjected to cross-linking grafting reaction, so that the surface tension and the adhesive property of the artificial grass silk and the base cloth are improved. The hot melt back adhesive is coated on the back surface of the elastic floor material coated with the interface coating agent through hot melt blade coating, the hot melt adhesive permeates into the roots of the artificial grass yarns, and the artificial grass yarns and the base cloth are bonded together after the artificial grass yarns and the base cloth are cooled. According to the method, the roots of the artificial grass yarns do not need to be melted or locally melted, the integrity of the artificial grass yarns is kept, the pull-out force is high, the environment is protected, and the elastic terrace material can be completely recycled.

Description

Technical Field

[0001] The present invention belongs to the technical field of artificial turf, and particularly relates to a fully recyclable shock pad turf and a preparation method thereof. Background Art

[0002] Artificial turf has been widely laid for many years due to its excellent sports performance, environmental friendliness, safety, and no need for special maintenance. Many turfs have reached the end of their service life, but the incompatibility between the back glue and the grass filaments and the bottom cloth makes it impossible to recycle, resulting in industrial waste and severely restricting the development of the industry. The recycling of turf has become the focus of the sustainable development of the industry. The main purpose of the back glue of the shock pad turf material is to fix the artificial grass filaments on the bottom cloth and has certain waterproof, gasoline-proof, acid and alkali-proof properties to prevent the artificial grass filaments from falling off due to sports wear of the shock pad turf material. Commonly used back glues include carboxylated styrene-butadiene latex, acrylic latex, polyurethane back glue, and SPU back glue. However, among these back glues, the latex has strong polarity and contains a large amount of fillers. During recycling, after the shock pad turf material is melted by heat, the compatibility between the back glue and the grass filaments and the bottom cloth is poor, making it difficult to recycle and reuse. In this way, after the artificial turf reaches the end of its service life, it can only be disposed of by landfill or incineration, causing environmental pollution and wasting raw materials.

[0003] The patent with the publication number CN103205221B discloses a hot-melt adhesive for the backing of artificial turf and its preparation method. Using hot-melt adhesive as the backing, it is melt-extruded and roll-coated on the back of the artificial turf to fix the artificial grass filaments. This hot-melt adhesive is composed of raw materials such as EVA, ethylene-propylene copolymer, polyolefin elastomer, amorphous polyolefin, etc., in combination with fillers, additives, etc. However, after melting, it has poor fluidity and high surface tension of the hot-melt adhesive, and cannot fully wet and penetrate the roots of the grass filaments, resulting in insufficient pulling force of the turf. To solve this problem, it is often necessary to increase the hot ironing temperature, and the grass filaments and the base cloth need to be partially melted, which is actually difficult to control. Excessive melting will cut off the grass filaments, insufficient melting will result in no pulling force of the grass filaments. In addition, for such products, when recycling, due to the large difference in the melting temperatures of EVA and PP base cloth, EVA recycling and degradation occur, and the recycled material has a sour smell and cannot be reused. The patent with the publication number CN104727202B discloses a recyclable artificial turf and its preparation method. By powder spreading, a recyclable turf is made, with high equipment costs, special requirements for the base cloth, and limited product stiffness. The patent with the publication number CN102808368A discloses a completely recyclable artificial turf and its preparation method. The EVA hot-melt adhesive is heated to 160 - 180 °C, and in the molten state, it is evenly coated on the PP base cloth with artificial grass filaments clustered on it. The artificial grass filaments are fixed by the EVA hot-melt adhesive, and at the same time, the overall recycling of the artificial turf is achieved; the patent with the publication number CN104060518A provides another recyclable artificial turf and its preparation method. The preparation method is to first cluster the artificial grass filaments on the PP base cloth to prepare a semi-finished product, and then through a casting coating process, thermoplastic elastomers such as TPR, TPE, and TPU are coated on the back side of the base cloth to form a backing adhesive layer with a thickness of 0.3 - 5 mm to prepare a recyclable artificial turf. The above two methods use thermoplastic materials to replace PU or styrene-butadiene latex to fix the artificial grass filaments and the base cloth together. Although they both meet the recyclable technical requirements of artificial turf, they have the following obvious disadvantages:

[0004] 1. High equipment investment and many limiting factors in the hot ironing process.

[0005] 2. A large amount of PE and PP materials are used for the base cloth, with low surface tension. After the hot-melt backing adhesive is melt-cast, it cannot fully wet the artificial grass filaments and the base cloth, and it is difficult to penetrate into the roots of the artificial grass filaments. There is no hot-melt adhesive coating on many grass filament roots, resulting in unqualified pulling force of the grass filaments. For this reason, many patents emphasize preheating the artificial turf to partially melt the artificial grass filaments. However, this operation often leads to the grass filament roots being cut off, or due to insufficient melting, there is no bonding at the grass filament roots, and the problem of unqualified pulling force.

[0006] 3. The stiffness of the turf is insufficient. The powder spreading process has good water permeability, but using non-woven fabric, the turf is not stiff, making packaging, transportation, and paving difficult, and the turf is prone to bulging.

[0007] Additionally, the grass filaments and the base cloth for the impact-resistant floor material are generally made of polyethylene and polypropylene materials, with a surface tension lower than 32 - 34 dyn / cm. It is very difficult to perform coating or bonding on their surfaces. To obtain good bonding effects, these materials generally need to be surface-treated to increase the surface tension of the materials, enhance the wettability of the materials, increase the polarity of the materials, and improve the bondability of the materials. Such as corona treatment, electric spark treatment, oxidation treatment, etc.; additionally, by changing the polarity of the material and increasing the bonding points of the material, such as treatment with silane, titanate coupling agents, etc. However, for the production of impact-resistant floor materials, the above treatment solutions have poor feasibility. First, the storage time after treatment is short. Second, the treatment effect is poor. Third, this treatment method has strong corrosiveness to the surface of the grass filaments and will damage the mechanical strength of the grass filaments. Summary of the Invention

[0008] The purpose of the present invention is to overcome the defects existing in the prior art and provide a fully recyclable impact-resistant floor.

[0009] In the first aspect of the present invention, a fully recyclable impact-resistant floor is provided, which includes a base cloth, on which artificial grass filaments are arranged. The artificial grass filaments are woven on the base cloth through a tufting process. A grass filament interface coating agent is coated on the lower layer of the base cloth, and the grass filament interface coating agent undergoes a cross-linking grafting reaction with the artificial grass filaments. A hot melt adhesive is hot melt scraped on the lower layer of the grass filament interface coating agent. The hot melt adhesive is bonded to the base cloth and the hot melt adhesive penetrates into the roots of the artificial grass filaments to bond the artificial grass filaments and the base cloth into one body.

[0010] A further solution is that the grass filament interface coating agent is composed of the following raw materials according to weight parts: 10 - 25 parts of an interfacial active factor, 1 - 5 parts of a foaming agent, and 60 - 70 parts of deionized water. The sum of the weight fractions of the above raw materials is 100%.

[0011] A further solution is that the interfacial active factor at least includes a non-polar chain segment group and a polar chain segment group. The non-polar chain segment undergoes a grafting reaction with the artificial grass filaments and the base cloth to form an integral body, and the polar chain segment group is directly connected to the non-polar chain segment;

[0012] The foaming agent is at least one of sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, α-olefin sulfonate, sodium lauryl polyether sulfate, sodium alkyl alcohol polyoxyethylene ether sulfate, etc.;

[0013] The non-polar chain segment group is selected from at least one of those containing vinyl, propenyl, isobutenyl, isooctenyl, etc.;

[0014] The polar chain segment group is selected from at least one of amino group, epoxy group, acid anhydride group, etc.

[0015] A further solution is that the surface active factor is one or more of silane coupling agent, titanate coupling agent, and polyethyleneimine.

[0016] A further solution is that the surface active factor is polyethyleneimine, and the weight-average molecular weight of the polyethyleneimine is 300 to 5000, and the proportion of primary amine groups is 25 to 45%.

[0017] A further solution is that the turf interface finishing agent is obtained by adding a foaming agent to a mixture of a surface active factor and deionized water and continuing to stir.

[0018] A further solution is that the reaction time is 10 - 20 minutes.

[0019] A further solution is that the hot melt adhesive is composed of the following raw materials by weight: 80 - 95 parts of polyolefin, 2 - 5 parts of super wetting and penetrating agent, 1 - 15 parts of heat stabilizer, 0.5 - 10 parts of melt index modifier, and the sum of the weight fractions of the above raw materials is 100%.

[0020] A further solution is that the preparation method of the hot melt adhesive is as follows:

[0021] Mix the mixture containing polyolefin, heat stabilizer, and super wetting and dispersing agent with the melt index modifier, conduct closed mixing, granulate, and dry to obtain;

[0022] The melting point of the hot melt adhesive is 80 - 95 °C, and the surface tension is 28 - 32 dyn / cm.

[0023] A further solution is that the super wetting and penetrating agent is a fluorocarbon surfactant; the heat stabilizer is a compound of phenolic antioxidant 1010 and phosphite antioxidant 168, and the compounding ratio is 1 / 1 - 1 / 2; the melt index modifier is used to control the melt index of the hot melt adhesive at 100 - 300 g / 10 min (2.16 kg × 190 °C).

[0024] A further solution is that the melting temperature of the hot melt scraping coating is 140 - 180 °C.

[0025] In the second aspect of the present invention, a preparation method of a fully recyclable floor spring lawn is provided, including the following steps:

[0026] Tuft artificial turf on the base cloth to produce a semi-finished product;

[0027] Uniformly coat the turf interface finishing agent on the back of the base cloth through a foaming machine, control the dosage of the surface active factor at 0.05 - 0.2 kg / m 2 , dry at 90 - 140 °C to obtain a floor spring lawn material treated with the turf interface finishing agent, and its surface tension is 38 - 48 dyn / cm;

[0028] Add the hot-melt adhesive material into a twin-screw coater with L / D≥28, set the screw temperature at 180-210°C, and evenly scrape and coat the hot-melt adhesive material on the back of the floor spring turf material. The dosage of the hot-melt adhesive material is 0.5-1.0 kg / m 2 , after the artificial turf cools down, the fully recyclable floor spring turf material is obtained.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] The floor spring turf material of the present invention uses artificial grass filaments and a base cloth. The artificial grass filaments are tufted on the base cloth, and a grass filament interface finishing agent is coated on the back surface thereof, which quickly penetrates to the roots of the grass filaments and the surface of the base cloth. Through heating and drying, grafting reactions, etc., the surface tension of the floor spring turf material and the adhesiveness of the artificial grass filaments are improved. A high-permeability and high-fluidity hot-melt adhesive is cast on the back of the floor spring turf material coated with the grass filament interface finishing agent. The hot-melt adhesive has a low surface tension and good wettability, and quickly penetrates to the roots of the grass filaments. After cooling, it forms an integral body with the grass filaments and the base cloth, greatly improving the pull-out force of the grass filaments.

[0031] The grass filament interface finishing agent of the present invention is composed of an interfacial active factor, a foaming agent, and water. The interfacial active factor is the key material of the grass filament interface finishing agent and is composed of a non-polar chain segment (ethylene / propylene group) and a polar chain segment (such as an amine group, an epoxy group, a hydroxyl group). The non-polar chain segment is the same as the floor spring turf material and has reactivity, and can undergo a grafting reaction with the grass filaments and the base cloth of the floor spring turf material to chelate into an integral body. The polar part is embedded on the non-polar chain segment, changing the polarity of the floor spring turf material, improving the surface tension of the floor spring turf material, and increasing the wettability and adhesiveness of the floor spring turf material.

[0032] The grass filament interface finishing agent of the present invention is physically foamed, sprayed or roll-coated on the back of the floor spring turf material. The grass filament interface finishing agent quickly penetrates and spreads on the surface of the floor spring turf material, and then is made by heating and drying. After being treated with the grass filament interface finishing agent, the surface tension of the artificial grass filaments and the base cloth of the floor spring turf material is increased from 30-34 dyn / cm to 44-48 dyn / cm, and the surface tension improvement effect is obvious. In addition, there are amine groups on the surfaces of the artificial grass filaments and the base cloth of the floor spring turf material, the polarity is increased, and the subsequent adhesiveness is significantly improved, and the bonding strength is increased.

[0033] The hot-melt adhesive of the present invention is prepared by reacting a general polyolefin as the main material, combined with a super wetting agent, a heat stabilizer, a melt index modifier, etc. The high-permeability and high-fluidity hot-melt adhesive has a low surface tension, good wettability, and fast penetration. The hot-melt adhesive is heated and melted, and then melt-coated on the back of the artificial turf material coated with the grass filament interface finishing agent. The hot-melt adhesive quickly penetrates into the roots of the grass filaments, and after cooling, bonds the grass filament base cloth together. The high heat fluidity ensures that after the hot-melt adhesive melts, it quickly penetrates into the roots of the grass filaments without scalding the grass filaments; the low surface tension ensures the wetting ability of the hot-melt adhesive to the grass filaments and the base cloth, ensuring that the roots of the grass filaments and the base cloth are completely wetted and penetrated by the hot-melt adhesive, ensuring that the grass filament pull-out force meets the standard, and the hot-melt adhesive will not damage the roots of the grass filaments and the lawn, ensuring that the lawn is straight and can be completely recycled.

[0034] Both the artificial grass filaments and the base cloth of the artificial turf material are non-polar materials with a low surface tension. Generally, after the hot-melt adhesive material melts, it is very difficult to wet and spread on its surface. Therefore, a super wetting and penetrating agent is added to the hot-melt adhesive of the present invention, so that the surface tension of the hot-melt adhesive is reduced to 28-32 dynes / cm, greatly improving the wetting and permeability of the hot-melt adhesive. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The following drawings are only schematic illustrations and explanations of the present invention and are not used to limit the scope of the present invention, wherein:

[0036] Figure 1 : Schematic diagram of the fully recyclable artificial turf structure of the present invention;

[0037] In the figure: 1, base cloth; 2, artificial grass filaments; 3, grass filament interface finishing agent; 4, hot-melt adhesive. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] In order to make the purpose, technical solution, design method and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings through specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] Example 1

[0040] As Figure 1 shown, the present invention provides a fully recyclable artificial turf, including a base cloth 1, the material of which is PP, and the specifications are 100 g / m 2 , 120 g / m 2 , 160 g / m 2 , 200 g / m 2For example, artificial grass filaments 2 are provided on the base fabric 1. The artificial grass filaments are those produced by conventional processes, and the materials include PP and PE. The artificial grass filaments 2 are woven on the base fabric 1 through tufting process. A grass filament interface finishing agent 3 is coated on the lower layer of the base fabric 1. The grass filament interface finishing agent 3 undergoes a cross-linking grafting reaction with the artificial grass filaments 2. A hot melt adhesive 4 is hot melt scraped and coated on the lower layer of the grass filament interface finishing agent 3. The hot melt adhesive 4 is bonded to the base fabric 1 and the hot melt adhesive 4 penetrates into the roots of the artificial grass filaments 2 to bond the artificial grass filaments 2 and the base fabric 1 into one body. Among them, the melting temperature for hot melt scraping is 140 - 180 °C.

[0041] In the above, the grass filament interface finishing agent 3 is composed of an interfacial active factor, a foaming agent, and water, with the weight parts being 10 - 25 parts of the interfacial active factor, 1 - 5 parts of the foaming agent, and 60 - 70 parts of deionized water. Specifically, the interfacial active factor is composed of a non-polar chain segment and a polar chain segment. The non-polar chain segment undergoes a grafting reaction with the artificial grass filaments 2 and the base fabric 1 to form one body, and the polar part is embedded on the non-polar chain segment. In this embodiment, the interfacial active factor is one or several of silane coupling agent, titanate coupling agent, and polyethyleneimine. The interfacial active factor is preferably polyethyleneimine, and the polyethyleneimine has a weight average molecular weight of 300 - 5000, and the proportion of primary amine groups is 25 - 45%. The preparation method of this grass filament interface finishing agent is as follows: Put polyethyleneimine into a reaction kettle, start stirring, add deionized water, fully stir until dissolved, then reduce the stirring speed, add the foaming agent and continue stirring for 10 - 20 minutes to obtain the grass filament interface finishing agent. The foaming agent is sodium dodecyl sulfate, the conductivity of the deionized water is lower than 0.1 microsiemens / cm, and the pH is 6.5 - 7.5.

[0042] This embodiment provides the following two groups of weight parts for preparing the grass filament interface finishing agent:

[0043] Example 1: The interfacial active factor selects polyethyleneimine (molecular weight 600, primary amine 35%), with a dosage of 15 parts, the foaming agent (K12) dosage of 3 parts, and 60 parts of deionized water.

[0044] Example 2: The interfacial active factor selects polyethyleneimine (molecular weight 1200, primary amine 32%), with a dosage of 15 parts, the foaming agent (K12) dosage of 3 parts, and 60 parts of deionized water.

[0045] First, put polyethyleneimine into a reaction kettle, start stirring, add water, fully stir for 10 - 20 minutes, after fully dissolving, reduce the stirring speed, add K12 (sodium dodecyl sulfate), and continue stirring for 10 - 20 minutes to obtain the grass filament interface finishing agent.

[0046] After physically foaming the above grass filament interface finishing agent, it is evenly coated on the back of the floor elastic material, ensuring that the dosage of the interfacial active factor is 0.05 - 0.2 kg / m2 and dried at 90-140°C to obtain the floor spring lawn material treated with the grass fiber interface finishing agent. The surface tension of the floor spring lawn material was measured, and the specific data is as follows:

[0047]

[0048] When the dosage of the interfacial activity factor exceeds 0.06 kg / m 2 , the tension of the floor spring lawn material reaches the corona treatment effect.

[0049] In this embodiment, the hot melt adhesive 4 is composed of polyolefin, super wetting and penetrating agent, heat stabilizer, and melt index modifier, with the weight parts being 80-95 parts of polyolefin, 2-5 parts of super wetting and penetrating agent, 1-15 parts of heat stabilizer, and 0.5-10 parts of melt index modifier. The preparation method of the hot melt adhesive is as follows: Add polyolefin into a stirring kettle, start stirring, and sequentially add the weighed heat stabilizer and super wetting and dispersing agent. After fully stirring and mixing evenly, add the melt index modifier, continue to stir evenly and then discharge. Add it into a mixer, mix evenly, and then introduce it into a granulator for granulation and drying; The melting point of the hot melt adhesive is 80-95°C, and the surface tension is 28-32 dyn / cm. Among them, the super wetting and penetrating agent is a fluorocarbon surfactant FSO-1100; The heat stabilizer is a compound of phenolic antioxidant 1010 and phosphite antioxidant 168, and the compounding ratio is 1 / 2; The melt index modifier is peroxide Trigonox 22-E50. By adjusting the dosage, the melt index of the hot melt adhesive material is controlled at 100-300 g / 10 min (2.16 kg × 190°C), that is, under the temperature of 190°C and the load condition of 2.16 kg, 12-30 grams of melt can flow out of the hot melt adhesive material per minute.

[0050] This embodiment provides the following three groups of weight parts for preparing the hot melt adhesive:

[0051] Example 3, 100 parts of polyolefin, 3 parts of super wetting and dispersing agent, 3 parts of heat stabilizer, and 2 parts of melt index modifier. After melting and kneading reaction for granulation, the hot melt adhesive is prepared.

[0052] Example 4, 100 parts of polyolefin, 3 parts of super wetting and dispersing agent, 3 parts of heat stabilizer, and 5 parts of melt index modifier. After melting reaction for granulation, the hot melt adhesive is obtained.

[0053] Example 5, 100 parts of polyolefin, 3 parts of super wetting and dispersing agent, and 3 parts of heat stabilizer.

[0054] The performance of the hot melt adhesive is as follows:

[0055]

[0056] As can be seen from the above table, the melt index modifier is very crucial for the fluidity of the hot melt adhesive.

[0057] In Example 6, after the tufting of the floor spring lawn material, the grass fiber interface finishing agent of Example 1 was applied, and the dosage of the interfacial active factor was 0.18 kg / m 2 , after drying, the hot melt back glue of Example 3 was coated, the melting temperature was 140 °C, and the glue consumption was 0.8 kg / m 2 .

[0058] In Example 7, after the tufting of the floor spring lawn material, the grass fiber interface finishing agent of Example 2 was applied, and the dosage of the interfacial active factor was 0.18 kg / m 2 , after drying, the hot melt back glue of Example 4 was coated, the melting temperature was 140 °C, and the glue consumption was 0.8 kg / m 2 .

[0059] The properties of the recyclable floor spring lawn material are as follows

[0060]

[0061]

[0062] Through comparison, it can be seen that the recyclable floor spring lawn material of the present invention meets the standards of GB36246-2018 and GB / T20394-2013.

[0063] Example 2

[0064] Based on Example 1, this example discloses a preparation method of a fully recyclable floor spring lawn, including the following steps:

[0065] Tuft artificial grass fibers 2 on the base cloth 1 to produce a semi-finished product;

[0066] Evenly coat the grass fiber interface finishing agent 3 on the back of the base cloth 1 through a foaming machine, control the dosage of the interfacial active factor to be 0.05-0.2 kg / m 2 , dry at 90-140 °C to obtain a floor spring lawn material treated with the grass fiber interface finishing agent 3, and its surface tension is 38-48 dyn / cm;

[0067] Add the hot melt back glue material to a twin-screw coater with L / D≥28, set the screw temperature to 180-210 °C, and evenly scrape and coat the hot melt back glue 4 on the back of the floor spring lawn material, the dosage of the hot melt back glue material: 0.5-1.0 kg / m 2 , after the artificial lawn cools down, a fully recyclable floor spring lawn material is obtained.

[0068] This embodiment also provides a recycling method for the recyclable floor spring material. The floor spring material is crushed and then kneaded in a kneader at a temperature of 90-140°C for 20-40 minutes. After the material is evenly, finely and glossily kneaded, it is introduced into a granulator for granulation to obtain fully recycled material.

[0069] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to technologies in the market, or to enable other ordinary skill in the art to understand the disclosed embodiments.

Claims

1. A fully recyclable ground spring floor, characterized in that, It includes a base fabric, on which artificial grass filaments are provided. The artificial grass filaments are woven on the base fabric through a tufting process. A grass filament interface finishing agent is coated on the lower layer of the base fabric, and the grass filament interface finishing agent undergoes a cross-linking grafting reaction with the artificial grass filaments. A hot melt adhesive is hot melt scraped and coated on the lower layer of the grass filament interface finishing agent. The hot melt adhesive is bonded to the base fabric and the hot melt adhesive penetrates into the roots of the artificial grass filaments to bond the artificial grass filaments and the base fabric into one body.

2. The full-recovery ground spring floor according to claim 1, characterized in that, The grass filament interface finishing agent is composed of the following raw materials according to weight parts: 10-25 parts of an interfacial active factor, 1-5 parts of a foaming agent, and 60-70 parts of deionized water. The sum of the weight fractions of the above raw materials is 100%.

3. A fully recyclable ground spring floor according to claim 2, characterized in that, The interfacial active factor at least includes a non-polar chain segment group and a polar chain segment group. The non-polar chain segment undergoes a grafting reaction with the artificial grass filaments and the base fabric to form an integral body, and the polar chain segment group is directly connected to the non-polar chain segment; The foaming agent is at least one of sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, α-olefin sulfonate, sodium lauryl polyether sulfate, sodium alkyl alcohol polyoxyethylene ether sulfate, etc.; The non-polar chain segment group is selected from at least one of those containing vinyl, propenyl, isobutenyl, isooctenyl, etc.; The polar chain segment group is selected from at least one of amino group, epoxy group, acid anhydride group, etc.; Preferably, the interfacial active factor is one or several of silane coupling agent, titanate coupling agent, and polyethyleneimine.

4. The full-recovery ground spring floor according to claim 3, characterized in that, The interfacial active factor is polyethyleneimine, and the polyethyleneimine has a weight average molecular weight of 300-5000, and the proportion of primary amine groups is 25-45%.

5. The full-recovery ground spring floor according to claim 2, characterized in that, The grass filament interface finishing agent is obtained by adding a foaming agent to a mixture of an interfacial active factor and deionized water, reacting, and continuing to stir; Preferably, the reaction time is 10-20 minutes.

6. A fully recyclable floor spring lawn according to claim 1, characterized in that, The hot melt adhesive is composed of the following raw materials according to weight parts: 80-95 parts of polyolefin, 2-5 parts of super wetting penetrant, 1-15 parts of heat stabilizer, 0.5-10 parts of melt index adjuster. The sum of the weight fractions of the above raw materials is 100%.

7. The full-recovery floor spring lawn according to claim 6, characterized in that, The preparation method of the hot melt adhesive is as follows: Mix a mixture containing polyolefin, heat stabilizer, and super wetting dispersant with a melt index adjuster, conduct intensive mixing, granulate, and dry to obtain it; The melting point of the hot melt adhesive is 80-95°C, and the surface tension is 28-32 dyn / cm.

8. A fully recyclable floor spring lawn according to claim 7, characterized in that, The super wetting penetrant is a fluorocarbon surfactant; the heat stabilizer is a compound of phenolic antioxidant 1010 and phosphite antioxidant 168, and the compounding ratio is 1 / 1-1 / 2; the melt index adjuster is used to control the melt index of the hot melt adhesive at 100-300 g / 10 min (2.16 kg×190°C).

9. A fully recyclable ground spring lawn according to claim 1, characterized in that, The melting temperature of the hot melt scraping is 140-180°C.

10. A preparation method of a fully recyclable ground spring lawn, characterized in that, It includes the following steps: Tuft the artificial grass filaments on the base fabric to produce a semi-finished product; Evenly coat the grass filament interface finishing agent on the back of the semi-finished product and dry it to obtain a grass filament interface finishing agent-treated ground elastic turf material; Evenly scrape and coat the hot melt adhesive material on the back of the ground elastic turf material and cool it to obtain a fully recyclable ground elastic turf material.

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