Use of polyolefins in recyclable artificial turf and dolls

Abstract

This invention discloses the use of polyolefin in recyclable artificial turf and dolls. [Means] A recoverable artificial turf comprising artificial turf pile, a first backing layer and a second backing layer in order from top to bottom, wherein the materials used for the artificial turf pile, the first backing layer and the second backing layer are all polyolefin materials, the artificial turf pile is tufted into the first backing layer and its roots penetrate the bottom of the first backing layer to form root piles, and the melting point of the polyolefin material in the artificial turf pile is lower than 120°C. The artificial turf according to the present invention is not only recoverable, but also reduces processing and manufacturing costs, and improves the utilization rate of the product by reusing the artificial turf as stuffing for dolls.

Description

[Technical Field]

[0001] This invention relates to the technical field of artificial turf, and more specifically to polyolefin recyclable artificial turf and its use in dolls. [Background technology]

[0002] In recent years, artificial turf has seen several new applications in the field of artificial grass, and based on feedback from overseas retail and supermarket clients, it has been well-received for manufacturing artificial turf in animal patterns for use in scenic areas and park layouts. Its main advantages are its excellent weather resistance and its ability to be incorporated into green spaces. However, the turf currently in use is made from products such as carboxylated styrene-butadiene latex, PU latex, and TPE backing adhesive, and as mentioned above, the backing is often too thick or too hard, causing significant difficulties in sewing and manufacturing, resulting in a manufacturing cost that is far higher than that of the turf material itself. Some turf manufacturers have tried reducing the amount of adhesive in the backing fabric or foaming the backing latex, but these have not resulted in significant improvements in manufacturing costs.

[0003] At the same time, the European Union is calling its "largest carbon market reform in history," and this refers to the Circular Economy Action Plan. The Circular Economy Action Plan is a sister policy to the carbon tariff and sets green standards for products entering the European market. At the heart of this action plan is sustainability, and by the end of 2024, the European Union aims to build a network of rules that cover all products and their entire lifecycle, from the initial design phase to production, use, and finally disposal, reducing waste generation and facilitating collection and sorting at the end of the lifecycle.

[0004] Therefore, in order to meet the rule requirements of future markets, how to provide artificial turf that is both recoverable and has reduced processing and manufacturing costs has become a technical problem that those skilled in the art must solve as soon as possible. [Overview of the project] [Problems that the invention aims to solve]

[0005] In view of this, the present invention provides polyolefin for use in recoverable artificial turf and dolls, which is easy to process and has low cost. [Means for solving the problem]

[0006] To achieve the above-mentioned objective, the present invention provides a polyolefin recoverable artificial turf comprising, from top to bottom, an artificial turf pile, a first backing layer, and a second backing layer, The materials used for the artificial turf pile, the first backing layer, and the second backing layer are all polyolefins. The present invention provides a polyolefin-recoverable artificial turf in which the melting point of the polyolefin in the artificial turf pile is lower than 120°C.

[0007] Preferably, the artificial turf pile is tufted into the first backing layer, and its roots penetrate the bottom of the first backing layer to form root piles. The first backing layer, the base pile, and the second backing layer are bonded together with a heat-melt adhesive. Alternatively, the first lining layer and the second lining layer are directly heat-bonded together via the base pile.

[0008] More preferably, the first lining layer and the second lining layer are directly heat-bonded together via the root pile.

[0009] Preferably, the melting point of the polyolefin material used in the artificial turf pile is 110 to 116°C.

[0010] Preferably, the melting point of the polyolefin material used in the second backing layer is 160 to 166°C.

[0011] The beneficial effects of adopting the above technical solution include at least the following. In order to ensure the dimensional stability of the second backing layer, the processing temperature of the hot-melt composite roll is set to 140 - 145°C. If the melting point of the polyolefin of the artificial turf pile is higher than 120°C, on the premise of reducing the thermal composite temperature, the melting at the pile root will be insufficient. Among the piles of the overall cluster, the piles close to the inside and far from the hot-melt roll are difficult to melt, the pulling force of the turf is reduced. If the temperature is lower than 100°C, the hardness and heat resistance performance of the pile will decrease, affecting the overall appearance of the turf.

[0012] Preferably, the first backing layer is a polypropylene woven fabric or a polyethylene woven fabric or a combination of both, and the grammage of the first backing layer is 50 - 150 g / m , , 2 , ,

[0017] , , 2 , 2 ,

[0018] , , ,

[0016] is.

[0013] Preferably, the first backing layer is a polypropylene woven fabric, and the grammage of the first backing layer is 55 - 135 g / m 2 is.

[0014] Preferably, the grammage of the first backing layer is 80 - 105 g / m 2 is.

[0015] The beneficial effects of the above technical solution include at least the following. When the grammage is lower than 55 g / m 2 , the strength of the first backing layer is poor, and the manufacturing efficiency is reduced. When the grammage is greater than 135 g / m 2 , the first backing layer of the turf is too thick, and the processing efficiency of the doll is reduced.

[0016] ​​​​​​​​​​​​​Preferably, the basis weight of the second backing layer is 15 to 50 g / m 2 is.

[0019] The beneficial effects of the above technical solution include at least the following. When the basis weight is lower than 10 g / m 2 , the laying on the surface of the base fabric becomes uneven, which is disadvantageous for the management and control of manufacturing stability. When the basis weight of the base fabric is greater than 55 g / m 2 , the cost of the base fabric is too high and the thermal composite manufacturing efficiency decreases. Comparatively speaking, it is preferable that the basis weight of the second backing layer is 15 to 50 g / m 2 .

[0020] Preferably, the hot-melt adhesive is any one kind or a combination thereof of a hot-melt adhesive film, a hot-melt adhesive net film, a hot-melt adhesive mesh film, and a hot-melt adhesive grid film.

[0021] Preferably, the hot-melt adhesive contains any one kind or a combination thereof of a random polyethylene resin, a polyethylene vinyl acetate resin, and an ethylene acrylic acid resin.

[0022] The beneficial effects of the above technical solution include at least the following. The above-mentioned random polyethylene resin, polyethylene vinyl acetate resin, and ethylene acrylic acid resin materials are ethylene-based resin materials, which have a strong adhesive force with non-polar polyolefin materials and provide a high adhesive force with the combination of the base fabric of the product.

[0023] Another object of the present invention is to provide the use of the above-mentioned polyolefin recoverable artificial turf in dolls.

[0024] Preferably, after slicing the polyolefin recoverable artificial turf and sewing it into the shape of a doll, a filling material is filled into the doll for manufacturing.

[0025] The recyclable artificial turf according to the present invention can be applied to various patterns of turf figures, and its base fabric is thin and easy to process, while ensuring good pull-out power. It can be applied to the manufacture of bear figurines, rabbit figurines, puppy figurines, lion figurines, and the like, but is not limited to these.

[0026] The filler material described above is one of the following: polypropylene staple fibers, recycled polypropylene staple fibers, polyester fibers, and recycled polyester fibers. [Effects of the Invention]

[0027] As can be seen from the above-described technical proposal, the present invention has the following beneficial effects compared to the conventional technology. The polyolefin recoverable artificial turf according to the present invention uses polyolefin material, and the adhesive-free turf can satisfy the requirements for subsequent material recovery processing. At the same time, the artificial turf according to the present invention is easy to process into a thin form, which can reduce labor costs and is advantageous for the commercialization and widespread adoption of the product. In wet environments during outdoor use, the pull-out force of the turf remains stable and does not tend to decrease, and the problem of adhesive detachment after the back surface is immersed in water is also solved. [Modes for carrying out the invention]

[0028] The following describes the technical concepts in the embodiments of the present invention clearly and completely, and it is clear that the embodiments described are only a part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art without creative labor based on the embodiments of the present invention are within the scope of the protection of the present invention.

[0029] Example 1 This embodiment discloses a polyolefin recoverable turf comprising artificial turf pile, a first backing layer, and a second backing layer.

[0030] The artificial turf pile is tufted into the first backing layer, and its roots penetrate the bottom of the first backing layer to form root piles. The first backing layer, root piles, and second backing layer are bonded together using a heat-melt adhesive net film (density 30 g / m²) through a heat-melt composite process.2 The bonding is done by ), and the thermal melting composite temperature is 142°C.

[0031] The melting point of polyolefin, a material used in artificial turf piles, is 116°C.

[0032] The first backing layer is made of polypropylene knitted fabric, with a basis weight of 80 g / m². 2 That is the case.

[0033] The heat-melt adhesive net film is made of random polyethylene resin material.

[0034] The second backing layer is made of polypropylene mesh fabric, with a basis weight of 10 g / m². 2 That is the case.

[0035] Example 2 This embodiment discloses a polyolefin recoverable turf, and the differences from Example 1 are as follows.

[0036] The second backing layer is a polypropylene long-fiber nonwoven fabric, with a basis weight of 15-50 g / m². 2 That is the case.

[0037] Example 3 This embodiment discloses a polyolefin recoverable turf, and the differences from Example 1 are as follows.

[0038] The first backing layer is made of polyethylene knitted fabric, with a basis weight of 105 g / m². 2 That is the case.

[0039] The heat-melt adhesive net film is made of polyethylene vinyl acetate resin.

[0040] The second backing layer is a polypropylene long-fiber nonwoven fabric, with a basis weight of 50 g / m². 2 That is the case.

[0041] Example 4 This embodiment discloses a polyolefin recoverable turf, and the differences from Example 2 are as follows.

[0042] The first and second backing layers are heat-melted and bonded together via the base pile using a thermal melting composite process.

[0043] The first backing layer is a combination of polypropylene knitted fabric and polyethylene knitted fabric, with a basis weight of 140 g / m². 2 That is the case.

[0044] The second backing layer is a polypropylene long-fiber nonwoven fabric, with a basis weight of 30 g / m². 2 That is the case.

[0045] Example 5 This embodiment discloses a polyolefin recoverable turf, and the differences from Example 1 are as follows.

[0046] The melting point of polyolefin, a material used in artificial turf piles, is 110°C.

[0047] The first backing layer is made of polypropylene knitted fabric, with a basis weight of 105 g / m². 2 That is the case.

[0048] The heat-melt adhesive net film is a mixed material of random polyethylene and polyethylene vinyl acetate resin.

[0049] The second lining layer is a combined bottom fabric consisting of a polypropylene mesh fabric and a polypropylene long-fiber nonwoven fabric layer, with a basis weight of 60 g / m². 2 That is the case.

[0050] Comparative Example 1 Comparative Example 1 is an artificial turf with a foamed carboxylated styrene-butadiene latex backing. The artificial turf pile is tufted into the first backing layer, and the roots penetrate the bottom of the first backing layer. The foamed carboxylated styrene-butadiene latex is applied to the roots of the artificial turf pile, and the amount of dry adhesive foamed carboxylated styrene-butadiene latex is 400 g / m². 2 Therefore, the amount of dry adhesive used for the foamed carboxylated styrene-butadiene latex in this Comparative Example 1 is the minimum amount of adhesive achievable with the current process.

[0051] Comparative Example 2 Comparative Example 2 is an artificial turf with a foamed polyurethane latex backing. The artificial turf pile is tufted into the first backing layer, and the roots penetrate the bottom of the first backing layer. The foamed polyurethane latex is applied to the roots of the artificial turf pile, and the amount of dry adhesive for the foamed polyurethane latex is 450 g / m². 2 Therefore, the amount of dry adhesive used in this comparative example 2 of foamed polyurethane latex is the minimum amount of adhesive achievable with the current process.

[0052] Comparative Example 3 Comparative Example 3 is a TPE-backed artificial turf in which artificial turf piles are tufted into the first backing layer, with the roots penetrating the bottom of the first backing layer to form root piles, a TPE film is attached to the back side, and after passing through a press roll, the base fabric and TPE film are attached, with the root piles positioned between the TPE film and the base fabric.

[0053] Comparative Example 4 Comparative Example 4 discloses a polyolefin recoverable turf, and the differences from Example 5 are as follows.

[0054] The melting point of the polyolefin raw material used in artificial turf pile is 124°C.

[0055] Evaluation of recoverability - Mechanical properties of recovered particles

[0056] Recovery granulation manufacturing process: A mechanical recovery method was adopted.

[0057] 1) The artificial turf product was crushed as a whole using a crushing device, resulting in irregular sheet material measuring 1-5 cm.

[0058] 2) Next, after washing and drying, it was prepared for use.

[0059] 3) Finally, the washed and dried turf sheets were granulated using a double-host shrink granulator at a granulation temperature of 150-170°C, stretched, and cut to produce recovered particles.

[0060] Evaluation of the mechanical properties of the recovered particles:

[0061] Tension strength: Measured using injection-molded standard specimens at a stretching speed of 5 mm / min according to standard ISO 527.

[0062] Bending strength: Measured using injection-molded standard specimens according to standard ISO 178 at a bending speed of 2 mm / min.

[0063] Izod impact strength: Measured according to standard ISO 180 using injection-molded standard specimens, 8 mm x 4 mm, at 23°C.

[0064] Table 1 shows the data on the mechanical performance of the recovered particles in Examples 1-4 and Comparative Examples 1-3. [Table 1]

[0065] As can be seen from Table 1, the turf in Examples 1-4 is a polyolefin material product, a thermoplastic material, and the granulated material obtained after product recovery can ensure higher mechanical performance compared to Comparative Examples 1-3, thus satisfying the European intent of product recovery.

[0066] Evaluation of the manufacturing cost of dolls: Dolls were manufactured using the artificial turf disclosed in Examples 1-4 and Comparative Examples 1-3.

[0067] The doll manufacturing process was mainly divided into the following four steps: Step 1 involved punching out small sheets of material according to the drawing. Step 2 involved sewing the doll pieces together. Step 3 involved stuffing the dolls with cotton. Step 4 involved closing the dolls shut. The cost was evaluated based on the total time required for each process. The results are shown in Table 2. [Table 2]

[0068] As can be seen from Table 2, the total turfing process in Examples 1-4 is 60% of that in Comparative Examples 1-3, which significantly reduces manufacturing time and is advantageous in reducing the total cost of the product.

[0069] Test criteria for pulling force: The artificial turf in Example 5 and Comparative Example 4 was measured according to the method in standard ISO 4919. The results are shown in Table 3. [Table 3]

[0070] In this specification, each embodiment is described progressively, with emphasis on the differences from other embodiments, and similar parts between embodiments should be cross-referenced. The apparatus disclosed in the embodiments corresponds to the methods disclosed in the embodiments, and therefore the description is relatively straightforward; relevant sections should be referred to in the description of the methods.

[0071] The above description of the disclosed embodiments will enable those skilled in the art to realize or use the invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be realized in other embodiments without departing from the spirit or scope of the invention. Accordingly, the invention is not limited to these embodiments shown herein, but rather conforms to the broadest scope that is consistent with the principles and novel features disclosed herein.

Claims

1. A polyolefin recoverable artificial turf comprising, from top to bottom, artificial turf pile, a first backing layer, and a second backing layer, The materials used for the artificial turf pile, the first backing layer, and the second backing layer are all polyolefins. The melting point of the polyolefin in the aforementioned artificial turf pile is lower than 120°C. A polyolefin-based recyclable artificial turf characterized by the following features.

2. The artificial turf pile is tufted into the first backing layer, and its roots penetrate the bottom of the first backing layer to form root piles. The first backing layer, the base pile, and the second backing layer are bonded together with a heat-melt adhesive. Alternatively, the first backing layer and the second backing layer are directly heat-bonded together via the base pile. The polyolefin recoverable artificial turf according to feature 1.

3. The melting point of the polyolefin material used in the aforementioned artificial turf pile is 110 to 116°C. The polyolefin recoverable artificial turf according to claim 2.

4. The melting point of the polyolefin material used in the second backing layer is 160 to 166°C. The polyolefin recoverable artificial turf according to claim 2.

5. The first backing layer is a polypropylene knitted fabric, a polyethylene knitted fabric, or a combination of both, and the basis weight of the first backing layer is 50 to 150 g / m². ２ That is, The polyolefin recoverable artificial turf according to claim 2.

6. The first backing layer is a polypropylene knitted fabric, and the basis weight of the first backing layer is 55 to 135 g / m². ２ That is, The polyolefin recoverable artificial turf according to claim 5.

7. The basis weight of the first backing layer is 80 to 105 g / m². ２ That is, The polyolefin recoverable artificial turf according to feature 6.

8. The second backing layer is one of the following selected from polypropylene mesh fabric, polypropylene long fiber nonwoven fabric layer, and polypropylene short fiber nonwoven fabric layer, or a combination thereof, and the basis weight of the second backing layer is 10 to 60 g / m². ２ That is, The polyolefin recoverable artificial turf according to feature 4.

9. The basis weight of the second backing layer is 12 to 55 g / m². ２ That is, The polyolefin recoverable artificial turf according to feature 8.

10. The basis weight of the second backing layer is 15-50 g / m². ２ That is, The polyolefin recoverable artificial turf according to feature 9.

11. The heat-melt adhesive is one of the following, or a combination thereof: a heat-melt adhesive film, a heat-melt adhesive net film, a heat-melt adhesive mesh film, and a heat-melt adhesive grid film. The polyolefin recoverable artificial turf according to claim 2.

12. The aforementioned heat-melt adhesive includes one of the following: random polyethylene resin, polyethylene vinyl acetate resin, and ethylene acrylic acid resin, or a combination thereof. The polyolefin recoverable artificial turf according to claim 2.

13. Use of the polyolefin recoverable artificial turf in a doll according to any one of claims 1 to 12.

14. The polyolefin recoverable artificial turf is sliced ​​and sewn into the shape of a doll, and then a filler material is filled into the inside of the doll shape to obtain the doll. The use of the polyolefin recoverable artificial turf in a doll according to feature 13.

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