Polyolefin recyclable artificial turf and application thereof in dolls

Abstract

The invention discloses a polyolefin recoverable artificial turf and application thereof in dolls. The recoverable artificial turf sequentially comprises artificial grass yarns, a base cloth layer and a bottom cloth layer from top to bottom, the artificial grass yarns, the base cloth layer and the bottom cloth layer are made of polyolefin materials; the artificial grass yarns are tufted on the base cloth layer, and the roots of the artificial grass yarns penetrate through the bottom of the base cloth layer to form root grass yarns; the melting point of the polyolefin material in the artificial grass is lower than 120 DEG C; the designed artificial turf can be recycled, the processing and manufacturing cost can be reduced, meanwhile, the artificial turf serves as filler of the doll to be reused, and the utilization rate of products is increased.

Description

Technical Field

[0001] The invention relates to the technical field of artificial turf, and more particularly to a polyolefin recyclable artificial turf and application thereof in dolls. Background Art

[0002] In recent years, artificial turf has some new applications in the field of lawn dolls. According to feedback from foreign supermarket customers, artificial turf made into animal patterns as scenic spots and park scenery has received good feedback. Its main advantage is good weather resistance and can be used as part of greening. However, the turf currently used are products such as carboxylated styrene butadiene latex, PU latex and TPE backing adhesive. The backing mentioned above is too thick and too hard, which greatly increases the difficulty of sewing manufacturing. The cost of the finished product is often much higher than the turf material itself. Although some turf manufacturers reduce the amount of base fabric glue and foam the backing latex, it does not improve the manufacturing cost much.

[0003] At the same time, the EU is called "the largest carbon market reform in history", which mentions the circular economy action plan. The circular economy action plan is a sister policy of carbon tariffs. It sets a green threshold for products to enter the European market. The core of this action plan is sustainability. It is expected that by the end of 2024, the EU will compile a network of rules that covers all products and their entire life cycle, from the initial design to production to the use stage, and finally to waste disposal. At the end of the life cycle, the generation of garbage should be reduced and it should be easy to recycle and classify.

[0004] Therefore, how to provide an artificial turf that can be recycled and reduce processing and manufacturing costs to meet the regulatory requirements of the future market is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In view of this, the present invention provides a polyolefin recyclable artificial turf with simple processing and low cost and application thereof in dolls.

[0006] In order to achieve the above-mentioned object, the present invention provides a polyolefin recyclable artificial turf, which comprises artificial turf yarn, a base fabric layer and a bottom fabric layer from top to bottom;

[0007] Among them, the materials used for artificial grass yarn, base fabric layer and bottom fabric layer are all polyolefins;

[0008] The melting point of the polyolefin in the artificial turf yarn is lower than 120°C.

[0009] Preferably, the artificial grass fibers are tufted on the base fabric layer, and the roots penetrate through the bottom of the base fabric layer to form root grass fibers;

[0010] The base fabric layer, the root grass fibers and the bottom layer are bonded by hot-melt adhesive material;

[0011] Or the base fabric layer and the bottom layer are directly thermally bonded via root grass yarns.

[0012] More preferably, the base fabric layer and the bottom layer are directly thermally bonded via root grass fibers.

[0013] Preferably, the melting temperature of the polyolefin material used for the artificial turf is 110-116°C.

[0014] Preferably, the melting temperature of the polyolefin material used for the bottom layer is 160-166°C.

[0015] The beneficial effects of adopting the above technical solution include at least: to ensure the dimensional stability of the base fabric layer, the processing temperature of the hot melt composite roller is set at 140-145°C. If the melting point of the polyolefin of the artificial turf is higher than 120°C, under the premise of lowering the hot composite temperature, the roots of the grass fibers cannot be fully melted, and the grass fibers close to the inside of the whole cluster of grass fibers and away from the hot melt roller are not easy to melt, and the pull-out force of the lawn is reduced. If the temperature is lower than 100°C, the hardness and heat resistance of the grass fibers are reduced, affecting the overall appearance of the lawn.

[0016] Preferably, the base fabric layer is a polypropylene woven fabric or a polyethylene woven fabric or a combination of the two, and the base fabric layer has a gram weight of 50-150 g / m 2 .

[0017] Preferably, the base fabric layer is a polypropylene woven fabric, and the weight of the base fabric layer is 55-135 g / m 2 ;

[0018] Preferably, the base fabric layer has a grammage of 80-105 g / m 2 .

[0019] The beneficial effects of adopting the above technical solution include at least: when the gram weight is less than 55g / m 2 When the base fabric strength is poor, the production efficiency will be reduced. When the weight is greater than 135g / m 2 Sometimes, the lawn base fabric is too thick, which reduces the efficiency of doll processing.

[0020] Preferably, the base fabric layer is selected from any one or a combination of a polypropylene mesh fabric, a polypropylene filament non-woven fabric layer and a polypropylene staple non-woven fabric layer; the base fabric layer has a gram weight of 10-60 g / m 2 .

[0021] Preferably, the base fabric layer has a grammage of 12-55 g / m 2 .

[0022] Preferably, the base fabric layer has a grammage of 15-50 g / m 2 .

[0023] The beneficial effects of adopting the above technical solution include at least: when the gram weight is less than 10g / m 2 The surface of the base fabric is unevenly laid, which is not conducive to production stability control. When the base fabric weight is greater than 55g / m 2 The cost of the base fabric is too high and reduces the efficiency of thermal composite production. After comprehensive comparison, the preferred base fabric weight is 15-50g / m 2 .

[0024] Preferably, the hot melt adhesive material is any one or a combination of a hot melt adhesive film, a hot melt adhesive mesh film, a hot melt adhesive grid film and a hot melt grid adhesive film.

[0025] Preferably, the hot melt adhesive material includes any one or a combination of random polyethylene resin, polyethylene vinyl acetate resin and ethylene acrylic acid resin.

[0026] The beneficial effects of adopting the above technical solution include at least: the random polyethylene resin, polyethylene vinyl acetate resin and ethylene acrylic resin materials are vinyl resins and non-polar polyolefin materials have strong adhesion, providing high adhesion of the base fabric combination of the product.

[0027] Another object of the present invention is to provide application of the above-mentioned polyolefin recyclable artificial turf in dolls.

[0028] Preferably, the polyolefin recyclable artificial turf is cut into slices and sewn into the shape of a doll, and then the filling material is filled into the doll to obtain the product.

[0029] The recyclable artificial turf of the invention is suitable for lawn dolls of various patterns, the base fabric is thin and easy to process, and a good pull-off force is ensured, and the invention is suitable for but not limited to the production and preparation of bear dolls, rabbit dolls, puppy dolls, lion dolls and the like.

[0030] The filling material is any one of polypropylene staple fiber, recycled polypropylene staple fiber, polyester fiber and recycled polyester fiber.

[0031] It can be seen from the above technical solutions that compared with the prior art, the present invention has the following beneficial effects: the polyolefin recyclable artificial turf of the present invention is made of polyolefin material, and the glue-free turf can meet the requirements of material recycling in the later stage. At the same time, the artificial turf provided by the present invention is thin and easy to process, which reduces labor costs and is more conducive to the market promotion of the product. In the wet environment during outdoor use, the pull-off force of the turf is stable and will not show a downward trend, which also solves the problem of glue falling off after the conventional backing is soaked in water. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1

[0034] This embodiment discloses a polyolefin recyclable lawn, including artificial grass yarn, a base fabric layer and a bottom fabric layer;

[0035] The artificial grass is tufted on the base fabric layer, and the roots penetrate the bottom of the base fabric layer to form root grass fibers; the base fabric layer, root grass fibers and bottom fabric layer are bonded by hot melt adhesive mesh (density 30g / m 2 ) bonding, hot melt lamination temperature 142°C;

[0036] The melting temperature of polyolefin, the material used for artificial grass, is 116°C;

[0037] The base fabric is polypropylene woven fabric with a gram weight of 80g / m 2 ;

[0038] The hot melt adhesive mesh is made of random polyethylene resin;

[0039] The base fabric is a polypropylene mesh fabric with a gram weight of 10g / m 2 .

[0040] Example 2

[0041] This embodiment discloses a polyolefin recyclable lawn, which is different from the embodiment 1 in that:

[0042] The base fabric is polypropylene filament non-woven fabric, and the weight of polypropylene filament non-woven fabric is 15-50g / m 2 .

[0043] Example 3

[0044] This embodiment discloses a polyolefin recyclable lawn, which is different from the embodiment 1 in that:

[0045] The base fabric layer is polyethylene woven fabric, and the weight of polyethylene woven fabric is 105g / m 2 ;

[0046] The hot melt adhesive mesh is made of polyethylene vinyl acetate resin;

[0047] The base fabric is polypropylene filament non-woven fabric, and the weight of the polypropylene filament non-woven fabric is 50g / m 2 .

[0048] Example 4

[0049] This embodiment discloses a polyolefin recyclable lawn, which is different from the embodiment 2 in that:

[0050] The base fabric layer and the bottom fabric layer are bonded by hot-melt bonding through the grass fibers at the root.

[0051] The base fabric layer is a combination of polypropylene woven fabric and polyethylene woven fabric. The weight of the combination of polypropylene woven fabric and polyethylene woven fabric is 140g / m 2 ;

[0052] The base layer is polypropylene filament non-woven fabric, and the weight of polypropylene filament non-woven fabric is 30g / m 2 .

[0053] Example 5

[0054] This embodiment discloses a polyolefin recyclable lawn, which is different from the embodiment 1 in that:

[0055] The melting temperature of polyolefin, the material used for artificial grass, is 110°C;

[0056] The base fabric is polypropylene woven fabric with a gram weight of 105g / m 2 ;

[0057] The hot melt adhesive mesh is a mixture of random polyethylene and polyethylene vinyl acetate resin;

[0058] The base fabric layer is a combination of polypropylene mesh cloth and polypropylene filament non-woven fabric layer. The weight of the combination of polypropylene mesh cloth and polypropylene filament non-woven fabric layer is 60g / m 2 .

[0059] Comparative Example 1

[0060] Comparative Example 1 is an artificial turf with a foamed carboxy styrene butadiene rubber backing. The artificial grass filaments are tufted to the base fabric layer, and the roots penetrate the bottom of the base fabric layer. The foamed carboxy styrene butadiene latex is coated on the roots of the artificial grass filaments. The dry glue amount of the foamed carboxy styrene butadiene latex is 400g / m 2 The dry glue amount of the foamed carboxylated styrene butadiene latex in Comparative Example 1 is the lowest glue amount that can be achieved by the current process.

[0061] Comparative Example 2

[0062] Comparative Example 2 is an artificial turf with a foamed polyurethane latex backing. The artificial grass filaments are tufted to the base fabric layer, and the roots penetrate the bottom of the base fabric layer. The foamed polyurethane latex is applied to the roots of the artificial grass filaments. The dry glue amount of the foamed polyurethane latex is 450g / m 2 The dry glue amount of the foamed polyurethane latex in this comparative example 1 is the lowest glue amount that can be achieved by the current process.

[0063] Comparative Example 3

[0064] Comparative Example 3 is an artificial turf with a TPE backing. The artificial grass fibers are tufted onto the base fabric layer, and the roots penetrate the bottom of the base fabric layer to form root grass fibers. The backing is bonded to a TPE film. After passing through a pressure roller, the TPE film is bonded to the base fabric, and the root grass fibers are located between the TPE film and the base fabric.

[0065] Comparative Example 4

[0066] Comparative Example 4 discloses a polyolefin recyclable lawn, which differs from Example 5 in that:

[0067] The melting point of the polyolefin raw material used in artificial turf is 124°C.

[0068] Recyclability Assessment-Mechanical Properties of Recycled Particles

[0069] Recycling granulation preparation process:

[0070] Mechanical recycling method: 1) The finished artificial turf is crushed as a whole in a crushing device into 1-5CM irregular small pieces;

[0071] 2) The second part is cleaned and dried for standby use;

[0072] 3) Finally, the cleaned and dried lawn fragments are granulated by a double-host shrink granulation equipment at a granulation temperature of 150-170°C, and then granulated into strands to produce recycled particles.

[0073] Evaluation of mechanical properties of recycled particles:

[0074] Tensile strength: measured using injection molded standard specimens according to standard ISO527, with a tensile rate of 5 mm / min.

[0075] Bending strength: measured by injection molded standard specimens according to ISO178, bending rate 2mm / min

[0076] Izod impact strength: measured using injection molded standard specimens according to standard ISO180, 8mm*4mm, 23°C.

[0077] The mechanical property data of the recycled particles of Examples 1-4 and Comparative Examples 1-3 are shown in Table 1.

[0078] Table 1

[0079]

[0080] As can be seen from Table 1, the lawns described in Examples 1-4 are polyolefin material products, thermoplastic materials, and the granulated materials after product recycling can maintain higher mechanical properties than those of Comparative Examples 1-3, and can meet the European purpose of product recycling.

[0081] Doll Manufacturing Cost Assessment:

[0082] Dolls were prepared using the artificial turf disclosed in Examples 1-4 and Comparative Examples 1-3.

[0083] The preparation of dolls is mainly divided into four steps: the first step: cutting into small pieces according to the drawing with a punch; the second step: the doll sewing process; the third step: the doll filling process; the fourth step: the doll closing process. The evaluation cost is evaluated based on the total process time required, and the results are shown in Table 2:

[0084] Table 2

[0085]

[0086] Note: For comparison, the height of the doll is 35cm.

[0087] It can be seen from Table 2 that the total lawn process designed in Examples 1-4 is 60% of that in Comparative Examples 1-3, which greatly reduces the preparation time and is beneficial to reducing the total cost of the product.

[0088] Pull-off force test standard: The artificial turf disclosed in Example 5 and Comparative Example 4 was tested according to the method in standard ISO4919. The results are shown in Table 3:

[0089] Table 3

[0090] Whole cluster pull-out force / N Single pull-out force / N Comparative Example 4 35 6 Example 5 40 10

[0091] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0092] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A polyolefin recyclable artificial turf, characterized in that: From top to bottom, it includes artificial grass, base fabric layer and bottom fabric layer; Among them, the materials used for artificial grass yarn, base fabric layer and bottom fabric layer are all polyolefins; The melting point of the polyolefin in the artificial turf yarn is lower than 120°C.

2. The polyolefin recyclable artificial turf according to claim 1, characterized in that: The artificial grass fibers are tufted on the base fabric layer, and the roots penetrate through the bottom of the base fabric layer to form root grass fibers; The base fabric layer, the root grass fibers and the bottom layer are bonded by hot-melt adhesive material; Or the base fabric layer and the bottom layer are directly thermally bonded via root grass yarns.

3. The polyolefin recyclable artificial turf according to claim 2, characterized in that: The melting temperature of the polyolefin material used for the artificial turf is 110-116°C.

4. The polyolefin recyclable artificial turf according to claim 2, characterized in that: The melting temperature of the polyolefin material used for the bottom layer is 160-166°C.

5. The polyolefin recyclable artificial turf according to claim 2, characterized in that: The base fabric layer is a polypropylene woven fabric or a polyethylene woven fabric or a combination of the two, and the gram weight of the base fabric layer is 50-150g / m 2 .

6. The polyolefin recyclable artificial turf according to claim 5, characterized in that: The base fabric layer is a polypropylene woven fabric, and the gram weight of the base fabric layer is 55-135g / m 2 .

7. The polyolefin recyclable artificial turf according to claim 6, characterized in that: The base fabric layer has a grammage of 80-105 g / m 2 .

8. The polyolefin recyclable artificial turf according to claim 4, characterized in that: The base fabric layer is selected from any one or a combination of polypropylene mesh fabric, polypropylene filament non-woven fabric layer and polypropylene staple non-woven fabric layer; the base fabric layer has a grammage of 10-60 g / m 2 .

9. The polyolefin recyclable artificial turf according to claim 8, characterized in that: The base fabric layer has a grammage of 12-55 g / m 2 .

10. The polyolefin recyclable artificial turf according to claim 9, characterized in that: The base fabric layer has a grammage of 15-50 g / m 2 .

11. The polyolefin recyclable artificial turf according to claim 2, characterized in that: The hot melt adhesive material is any one or a combination of a hot melt adhesive film, a hot melt adhesive mesh film, a hot melt adhesive grid film and a hot melt grid adhesive film.

12. The polyolefin recyclable artificial turf according to claim 2, characterized in that: The hot melt adhesive material includes any one or a combination of random polyethylene resin, polyethylene vinyl acetate resin and ethylene acrylic acid resin.

13. Use of the polyolefin recyclable artificial turf according to any one of claims 1 to 12 in dolls.

14. The use of the polyolefin recyclable artificial turf in dolls according to claim 13, characterized in that: The polyolefin recyclable artificial turf is cut into slices and sewn into a doll shape, and then a filling material is filled into the doll shape to obtain the doll.

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