Artificial turf with high pull-out resistance
By combining a layered base layer design with barbed anchor heads and a gradient adhesive structure, the problems of easy shedding of grass fibers and base layer deformation in existing artificial turf have been solved, achieving a turf effect with high pull-out resistance and long life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU SETH ARTIFICIAL TURF CO LTD
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-14
AI Technical Summary
Existing artificial turf grass fibers are implanted into the base layer through a single tufting process and are fixed solely by adhesives. This results in low root anchoring strength, making them prone to falling off during frequent trampling and dragging. In particular, the grass fibers are easily pulled out in sports fields, affecting safety and lifespan. Furthermore, the base layer material is prone to deformation, leading to uneven stress on the grass fibers and breakage of some fibers.
The base layer design adopts a layered structure, including an impermeable bottom layer, a drainage buffer layer, a reinforcing substrate layer, and a composite anchoring layer. Combined with a gradient adhesive structure and barbed anchor heads, it enhances the connection strength between the grass fibers and the base layer. Through the interlocking and adhesive structure of the composite anchoring layer and the reinforcing substrate layer, an integrated load-bearing system is formed.
It significantly enhances the connection strength between the grass fibers and the subgrade, prevents grass fibers from falling off, reduces subgrade deformation, ensures uniform stress on the grass fibers, extends the service life of the lawn, and is suitable for high-frequency use scenarios.
Smart Images
Figure CN224494796U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of artificial turf technology, and in particular to an artificial turf with high pull-out resistance. Background Technology
[0002] Artificial turf is classified into injection-molded artificial turf and woven artificial turf according to its production process. Injection-molded artificial turf uses injection molding technology to extrude plastic granules into a mold in one go, and then uses bending technology to bend the turf so that the grass blades are arranged in a regular pattern with equal spacing and quantity, and the grass blades are completely uniform in height. It is suitable for kindergartens, sports fields, balconies, greening, sandblasting and other applications.
[0003] However, existing artificial turf has many problems: traditional grass fibers are mostly implanted into the base layer through a single tufting process and are fixed only by adhesives. The root anchoring strength is low, and they are easy to fall off when frequently stepped on or dragged. Especially in sports fields, athletes' sudden stops and turns will exacerbate the grass fibers being pulled out, affecting the safety and lifespan of the field. Secondly, the base layer is mostly made of a single material (such as polypropylene woven fabric), which is prone to local deformation under stress, resulting in uneven stress on the roots of the grass fibers, and some grass fibers break due to excessive pulling.
[0004] Therefore, an artificial turf with high pull-out resistance is proposed. Utility Model Content
[0005] The purpose of this invention is to provide an artificial turf with high pull-out resistance, which solves the problems of traditional artificial turf where grass fibers are implanted into the base layer through a single tufting process and fixed only by adhesive. This results in low root anchoring strength, making the grass fibers easy to fall off when frequently stepped on or dragged. Especially in sports fields, athletes' sudden stops and turns exacerbate the pull-out of grass fibers, affecting the safety and lifespan of the field. Secondly, the base layer is often made of a single material (such as polypropylene woven fabric), which is prone to local deformation under stress, leading to uneven stress on the roots of the grass fibers and the breakage of some grass fibers due to excessive pulling.
[0006] To achieve the above objectives, the present invention provides the following technical solution: an artificial turf with high pull-out resistance, comprising a grass fiber layer and a base layer, wherein the base layer comprises, from bottom to top, an impermeable bottom layer, a drainage buffer layer, a reinforcing substrate layer and a composite anchoring layer, wherein a gradient adhesive structure is provided between the composite anchoring layer and the reinforcing substrate layer;
[0007] The grass fiber layer is implanted into the composite anchoring layer through a tufting process, and barbed anchor heads are formed at the root of the grass fiber layer.
[0008] Preferably, the grass fiber layer includes monofilaments and crimped filaments, the monofilaments have a rhomboid cross-section, the crimped filaments have a spiral structure, and the monofilaments and crimped filaments are mixed and distributed.
[0009] Preferably, the composite anchoring layer is two layers of modified polypropylene base film, and a glass fiber mesh is embedded between the two layers of modified polypropylene base film.
[0010] Preferably, the top of the composite anchoring layer is provided with a conical protrusion, and the conical protrusion and the barbed anchor head at the root of the grass fibers form an interlocking structure.
[0011] Preferably, the reinforcing substrate layer comprises a polyester nonwoven fabric and a rubber particle pad layer, wherein the polyester nonwoven fabric and the rubber particles are composited by a needle punching process, and PP mesh reinforcement is embedded inside the reinforcing substrate layer.
[0012] Preferably, the drainage buffer layer is a porous EPDM rubber sheet with honeycomb drainage channels inside, and the inner wall of the drainage channels is provided with guide grooves.
[0013] Preferably, the impermeable bottom layer is an HDPE membrane with micro-perforations distributed on its surface.
[0014] Preferably, the gradient adhesive structure includes a penetrating adhesive, an elastic adhesive, and a sealant, which are arranged sequentially from bottom to top, and the sealant fills the edge between the composite anchoring layer and the reinforcing substrate layer.
[0015] Preferably, the penetrating adhesive is a water-based polyurethane adhesive, the elastic adhesive is a styrene-butadiene rubber modified adhesive, and the sealant is a silane-modified polyether adhesive.
[0016] Preferably, the thickness of the elastic adhesive is 1 mm, and both the penetrating adhesive and the elastic adhesive have micropores inside.
[0017] Compared with the prior art, the beneficial effects of this utility model are:
[0018] 1. The barbed anchor head at the root of the grass fiber in this application interlocks with the conical protrusion of the composite anchor layer. Combined with the multi-layer bonding of the gradient adhesive structure, an integrated force-bearing system of grass fiber, anchor layer and base layer is constructed, which greatly enhances the connection strength between grass fiber and base layer, resists grass fiber shedding caused by frequent trampling and dragging, and solves the pain point of easy shedding of traditional lawn grass fiber.
[0019] 2. The composite structure of the reinforcing substrate layer in this application has both toughness and elasticity, reducing local stress deformation. Furthermore, the double-layer base film and fiberglass mesh of the composite anchoring layer enhance tear resistance, ensuring uniform stress at the roots of the grass fibers and extending the service life of the lawn. Attached Figure Description
[0020] Figure 1 This is a structural diagram of the artificial turf with high pull-out resistance of this utility model.
[0021] Figure 2 This is a schematic diagram showing the connection between the grass fiber layer and the base layer of this utility model;
[0022] Figure 3 This is a cross-sectional schematic diagram of the composite anchoring layer of this utility model;
[0023] Figure 4 This is a cross-sectional schematic diagram of the reinforcing substrate layer of this utility model;
[0024] Figure 5 This is a cross-sectional schematic diagram of the gradient adhesive structure of this utility model.
[0025] In the diagram, 1. Grass fiber layer; 11. Monofilament; 12. Curled filament; 2. Base layer; 21. Impermeable bottom layer; 22. Drainage buffer layer; 23. Reinforcing substrate layer; 231. Polyester nonwoven fabric; 232. Rubber granule pad layer; 24. Composite anchoring layer; 3. Gradient adhesive structure; 31. Penetrating adhesive; 32. Elastic adhesive; 33. Sealant; 4. Conical protrusion; 5. PP mesh reinforcement; 6. Drainage channel. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] Please see Figure 1-5 The present invention provides the following technical solution:
[0028] An artificial turf with high pull-out resistance includes a grass fiber layer 1 and a base layer 2. The base layer 2 includes, from bottom to top, an impermeable bottom layer 21, a drainage buffer layer 22, a reinforcing substrate layer 23 and a composite anchoring layer 24. A gradient adhesive structure 3 is provided between the composite anchoring layer 24 and the reinforcing substrate layer 23.
[0029] The grass fiber layer 1 is implanted into the composite anchoring layer 24 through a tufting process, and the root of the grass fiber layer 1 forms a barbed anchoring head.
[0030] In this embodiment: through the layered structure of the base layer 2, the impermeable bottom layer 21, the drainage buffer layer 22, the reinforcing substrate layer 23 and the composite anchoring layer 24 work together with the gradient adhesive structure 3 to form a whole with complementary functions and unified stress. The grass fiber layer 1 is combined with the composite anchoring layer 24 through the barbed anchor head, which solves the problem of insufficient pull-out strength caused by traditional grass fibers relying solely on adhesive for fixation. The gradient adhesive structure 3 enhances the connection strength between the composite anchoring layer 24 and the reinforcing substrate layer 23, avoids interlayer separation, and ensures the structural stability of the lawn under frequent stress.
[0031] Specifically, such as Figure 2As shown, the grass fiber layer 1 includes monofilaments 11 and crimped filaments 12. The cross-section of monofilament 11 is rhomboid, and the crimped filaments 12 have a spiral structure. The monofilaments 11 and crimped filaments 12 are mixed and distributed.
[0032] Specifically, such as Figure 3 As shown, the composite anchoring layer 24 consists of two layers of modified polypropylene base film, with a glass fiber mesh embedded between the two layers of modified polypropylene base film.
[0033] Specifically, such as Figure 2 As shown, the top of the composite anchoring layer 24 is provided with a conical protrusion 4, and the conical protrusion 4 and the barbed anchor head at the root of the grass fiber form an interlocking structure.
[0034] In this embodiment: monofilament 11 provides rigid support to resist lodging during trampling, while crimped filament 12 enhances elasticity and ensures rapid recovery after trampling. The mixed distribution of the two not only improves the wear resistance of the lawn but also avoids the defects of easy breakage of a single grass fiber structure, reducing shedding caused by damage to the grass fibers themselves and extending the service life of the grass fiber layer 1. By forming a membrane and fiber composite reinforcement structure through a double-layer modified polypropylene base film and an internal glass fiber mesh, the tear resistance and integrity of the composite anchoring layer 24 are greatly improved. Compared with a single-layer base film, it can effectively disperse the force on the grass fiber roots, avoid grass fiber loosening caused by local tearing, and enhance the anchoring ability of the grass fibers, adapting to high-frequency use scenarios. The conical protrusion 4 at the top of the composite anchoring layer 24 forms a mechanical interlock with the barbed anchor head at the grass fiber roots. The pull-out resistance of the grass fibers is enhanced through the dual action of physical interlocking and adhesive fixation, solving the problem of easy delamination of traditional single adhesive connections. The interlocking structure can disperse the tensile force at the grass fiber roots, and even if the local adhesive layer is slightly aged, the pull-out resistance can still be maintained through mechanical interlocking.
[0035] Specifically, such as Figure 4 As shown, the reinforcing substrate layer 23 includes a polyester nonwoven fabric 231 and a rubber particle pad layer 232. The polyester nonwoven fabric 231 and the rubber particles are composited by a needle punching process, and PP mesh ribs 5 are embedded inside the reinforcing substrate layer 23.
[0036] Specifically, such as Figure 2 As shown, the drainage buffer layer 22 is a porous EPDM rubber sheet with honeycomb drainage channels 6 inside, and the inner wall of the drainage channels 6 is provided with guide grooves.
[0037] Specifically, such as Figure 2 As shown, the impermeable bottom layer 21 is an HDPE membrane with micro-perforations distributed on its surface.
[0038] In this embodiment: Polyester nonwoven fabric 231 is combined with rubber granules through a needle-punching process, combining the toughness of fibers with the elasticity of granules, reducing the stress deformation of the base layer 2. The internal PP mesh reinforcement 5 further enhances the overall rigidity, avoiding uneven stress on the grass roots caused by local collapse. The reinforced substrate layer 23 provides stable support for the composite anchoring layer 24, indirectly improving the pull-out resistance of the grass and adapting to heavy load scenarios. The drainage buffer layer 22, composed of porous EPDM rubber sheet, can quickly drain accumulated water using its internal honeycomb drainage channels 6, preventing water accumulation in the base layer 2 and causing the rubber layer to age. At the same time, the elasticity of EPDM rubber can absorb impact force, reducing the instantaneous stress on the grass roots, combining drainage and buffering functions, and extending the service life of the lawn. The HDPE membrane, as the impermeable bottom layer 21, can prevent underground soil particles from seeping back into the drainage buffer layer 22, preventing channel blockage. Its surface micro-perforations allow a small amount of water vapor to permeate, balancing the humidity of the base layer 2 and preventing material embrittlement caused by excessive dryness. The impermeable bottom layer 21 protects the long-term effectiveness of the drainage system and indirectly ensures the stability of the lawn structure.
[0039] Specifically, such as Figure 5 As shown, the gradient adhesive structure 3 includes penetrating adhesive 31, elastic adhesive 32 and sealant 33, which are arranged sequentially from bottom to top. The sealant 33 fills the gap between the composite anchoring layer 24 and the reinforcing substrate layer 23.
[0040] Specifically, such as Figure 5 As shown, the penetrating adhesive 31 is a water-based polyurethane adhesive, the elastic adhesive 32 is a styrene-butadiene rubber modified adhesive, and the sealant 33 is a silane-modified polyether adhesive.
[0041] Specifically, such as Figure 5 As shown, the thickness of the elastic adhesive 32 is 1 mm, and both the penetrating adhesive 31 and the elastic adhesive 32 have micropores inside.
[0042] In this embodiment: the permeating adhesive 31 and elastic adhesive 32 of the gradient adhesive structure 3 cover the reinforcing substrate layer 23 from bottom to top, ensuring full bonding between layers. The sealant 33 only fills the edge gaps, preventing water from entering from the edges without affecting drainage in the middle area. This full-area bonding and edge sealing design solves the problem of traditional full-sealing adhesive 33 layers hindering drainage, balancing bonding strength and drainage. The water-based polyurethane permeating adhesive 31 penetrates into the reinforcing substrate layer 23 to form anchor points, enhancing bonding strength. The styrene-butadiene rubber modified elastic adhesive 32 absorbs impact stress, preventing the adhesive layer from becoming brittle. The silane modified polyether sealant 33 has strong weather resistance and effectively blocks edge water intrusion. The three adhesives work together to anchor, buffer, and seal, adapting to complex outdoor environments and extending the service life of the adhesive layer. The micropores inside the permeating adhesive 31 and elastic adhesive 32 allow water to pass through, resolving the conflict between adhesive layer coverage and drainage. The microporous structure does not affect the strength of the adhesive layer itself, but ensures that water can smoothly enter the drainage system, preventing adhesive layer failure caused by water accumulation in the base layer 2 and maintaining long-term pull-out resistance.
[0043] Working principle: When artificial turf is used, the grass fiber layer 1 is implanted into the composite anchoring layer 24 through a tufting process. The roots of the grass fibers form barbed anchor heads within the composite anchoring layer 24, which interlock with the conical protrusions 4 at the top of the composite anchoring layer 24, forming a mechanical interlocking structure. At the same time, the composite anchoring layer 24 and the reinforcing substrate layer 23 are tightly connected through a gradient adhesive structure 3: the penetrating adhesive 31 penetrates into the gaps between the polyester nonwoven fabric 231 fibers and the pores of the rubber particles in the reinforcing substrate layer 23, forming micro-anchor points distributed throughout the entire area. The elastic adhesive 32 is evenly covered on the penetrating adhesive 31, and the anchors are connected to the base layer through their own elasticity. 2. The anchoring layer adhesive and sealant 33 only fill the edge gaps, achieving a layer bonding mode of bonding in the middle and sealing at the edges, ensuring that there is no local separation between the composite anchoring layer 24 and the reinforcing substrate layer 23; when the lawn is subjected to external forces such as trampling and dragging, the grass fiber layer 1 first bears the tensile force: the rhomboid cross-section monofilament 11 provides rigid support to resist lodging; the spiral structure crimped filament 12 absorbs stress through elastic deformation, reducing the instantaneous force on the grass fiber roots, and the barbed anchor heads at the grass fiber roots and the conical protrusions 4 of the composite anchoring layer 24 disperse the tensile force through an interlocking structure, avoiding local stress concentration, while the composite anchoring layer 24... The double-layer base film and fiberglass mesh transmit force to the reinforcing substrate layer 23, and the load is further dispersed by the PP mesh reinforcement 5, polyester nonwoven fabric 231, and rubber granule composite structure within the reinforcing substrate layer 23, preventing uneven stress on the grass roots caused by deformation of the base layer 2. The entire stress process forms an integrated load-bearing system of grass fibers, anchoring layer, and base layer 2, significantly improving the pull-out resistance of grass fibers and preventing them from falling off. When there is rain or standing water on the lawn surface, the water passes through the micropores inside the penetrating adhesive 31 and elastic adhesive 32, and with the help of capillary action and the micro-swelling properties of the adhesive layer, flows from the composite anchoring layer 24 and the reinforcing substrate layer 23. The moisture penetrates to the reinforcing substrate layer 23 through the bonding surface. The fiber gaps and rubber particle pores of the reinforcing substrate layer 23 guide the moisture to diffuse in all directions, avoiding local water accumulation. The grid structure of the PP mesh reinforcement 5 further assists in the even distribution of moisture. Under the action of gravity, the moisture seeps into the honeycomb channels of the drainage buffer layer 22. The guide grooves on the inner wall of the channel guide the water flow to converge quickly and flow towards the edge of the lawn. At the same time, the impermeable bottom layer 21 prevents underground soil particles from entering the drainage channel 6. The micro-perforations on the surface balance the humidity of the base layer 2. Finally, the moisture is discharged through the drainage system around the site, avoiding water accumulation in the base layer 2 and causing the adhesive layer to age.
[0044] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An artificial turf with high pull-out resistance, comprising a grass fiber layer (1) and a base layer (2), characterized in that: The base layer (2) includes, from bottom to top, an impermeable bottom layer (21), a drainage buffer layer (22), a reinforcing substrate layer (23), and a composite anchoring layer (24). A gradient adhesive structure (3) is provided between the composite anchoring layer (24) and the reinforcing substrate layer (23). The grass fiber layer (1) is implanted into the composite anchoring layer (24) through a tufting process, and a barbed anchor head is formed at the root of the grass fiber layer (1).
2. The artificial turf with high pull-out resistance according to claim 1, characterized in that: The grass fiber layer (1) includes monofilaments (11) and crimped filaments (12). The monofilaments (11) have a rhomboid cross-section, and the crimped filaments (12) have a spiral structure. The monofilaments (11) and crimped filaments (12) are mixed and distributed.
3. The artificial turf with high pull-out resistance according to claim 2, characterized in that: The composite anchoring layer (24) consists of two layers of modified polypropylene base film, with glass fiber mesh embedded between the two layers of modified polypropylene base film.
4. The artificial turf with high pull-out resistance according to claim 3, characterized in that: The top of the composite anchoring layer (24) is provided with a conical protrusion (4), and the conical protrusion (4) and the barbed anchor head at the root of the grass fiber form an interlocking structure.
5. The artificial turf with high pull-out resistance according to claim 1, characterized in that: The reinforcing substrate layer (23) includes a polyester nonwoven fabric (231) and a rubber particle pad layer (232). The polyester nonwoven fabric (231) and the rubber particles are composited by a needle punching process, and PP mesh ribs (5) are embedded inside the reinforcing substrate layer (23).
6. The artificial turf with high pull-out resistance according to claim 1, characterized in that: The drainage buffer layer (22) is a porous EPDM rubber sheet with a honeycomb drainage channel (6) inside. The inner wall of the drainage channel (6) is provided with a guide groove.
7. The artificial turf with high pull-out resistance according to claim 1, characterized in that: The impermeable bottom layer (21) is an HDPE membrane with micro-perforations distributed on its surface.
8. The artificial turf with high pull-out resistance according to claim 1, characterized in that: The gradient adhesive structure (3) includes penetrating adhesive (31), elastic adhesive (32) and sealant (33), which are arranged sequentially from bottom to top. The sealant (33) fills the gap between the composite anchoring layer (24) and the reinforcing substrate layer (23).
9. The artificial turf with high pull-out resistance according to claim 8, characterized in that: The penetrating adhesive (31) is a water-based polyurethane adhesive, the elastic adhesive (32) is a styrene-butadiene rubber modified adhesive, and the sealant (33) is a silane-modified polyether adhesive.
10. The artificial turf with high pull-out resistance according to claim 8, characterized in that: The thickness of the elastic adhesive (32) is 1 mm, and both the penetrating adhesive (31) and the elastic adhesive (32) have micropores inside.