A method for preparing a two-component solvent-free PU elastic layer

Abstract

The application discloses a kind of preparation methods of two-component solventless PU elastic layer, it is related to court surface layer material field, including bottom layer, fabric layer, multiple A-component filling bags and multiple B-component filling bags, and it is implemented preparation as follows step: S1, the multiple A-component filling bags and the multiple B-component filling bags are pasted between the bottom layer and the fabric layer;S2, A-component filling bag and B-component filling bag outside are engraved fragile side;S3, A-component and B-component are filled in A-component filling bag and B-component filling bag respectively;S4, several fine holes are set on the bottom layer;S5, using road roller compaction fabric layer, and then flatten the multiple A-component filling bags and the multiple B-component filling bags, fragile side is broken under pressure, let A-component and B-component be mutually fused between the bottom layer and the fabric layer, form two-component PU elastic layer.

Description

Technical Field

[0001] This invention relates to the field of sports field surface materials, and in particular to a method for preparing a two-component solvent-free PU elastic layer. Background Technology

[0002] Silicone polyurethane (PU) is a healthy, professional, elastic synthetic sports court surface material system that conforms to ergonomic principles and meets the physical requirements of sports. It features a hard-on-top, elastic-bottom structure and can be directly applied to cement or asphalt bases. It consists of a single-component silicone-modified polyurethane buffer and rebound structure, and a two-component modified acrylic layer for wear resistance. It is commonly used in sports venues such as basketball courts and badminton courts.

[0003] For current two-component PU elastic layers, components A and B are usually directly fused together before being sold. There is a flame-retardant and heat-resistant two-component polyurethane turf backing adhesive for artificial turf (application number 201910541442.X). This direct combination of two components will shorten the shelf life of the elastic layer material. It needs to be used in time after production to avoid hardening.

[0004] Therefore, it is necessary to design a preparation method that allows the two components to be fused only during use. Summary of the Invention

[0005] To overcome the shortcomings mentioned above, the present invention provides a technical solution that can solve the above problems.

[0006] A method for preparing a two-component solvent-free PU elastic layer includes a base layer, a top layer, multiple A-component filler packets, and multiple B-component filler packets, and is carried out according to the following steps:

[0007] S1. Adhere the plurality of A-component filler packs and the plurality of B-component filler packs between the bottom layer and the fabric layer, wherein the plurality of A-component filler packs and the plurality of B-component filler packs are evenly staggered with each other;

[0008] S2. A breakable edge is engraved on the outer side of the A component filler pack and the B component filler pack. The breakable edge is a complete circle structure. The breakable edge divides the A component filler pack and the B component filler pack into upper and lower semicircles respectively.

[0009] S3. Fill the A component filling package and the B component filling package with component A and component B respectively, and the quantity ratio of the A component filling package to the B component filling package is 42:65;

[0010] S4. A plurality of fine holes are formed on the bottom layer, and the plurality of fine holes are arranged in a uniform array with each other.

[0011] S5. Use a road roller to compact the fabric layer, thereby flattening the multiple A-component filler packs and the multiple B-component filler packs. The fragile edges break under pressure, allowing the A-component and the B-component to fuse together between the bottom layer and the fabric layer, forming a two-component PU elastic layer.

[0012] As a further aspect of the present invention: the bottom surface of the upper semicircle of the A component filling package and the B component filling package is a planar structure, and the A component and the B component are respectively filled into the lower semicircle of the A component filling package and the B component filling package.

[0013] As a further aspect of the present invention: the bottom side of the fabric layer is formed with a plurality of semi-circular grooves, and the upper semi-circles of the plurality of A-component filling packs and the plurality of B-component filling packs are correspondingly pasted and fixed in the semi-circular grooves.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the quantity ratio of the A component filler bag and the B component filler bag is preset. After being flattened by a road roller, the A component filler bag and the B component filler bag will burst outward through the easily broken edge, thereby allowing the A component and the B component to fuse together. Since the A component filler bag and the B component filler bag were originally evenly and alternately arranged, the A component and the B component can fuse evenly. The elastic material after fusion will penetrate into the bottom side of the bottom layer through the fine pores, thereby adhering firmly to the court floor. After production, it can be stored for a long time.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 2 yes Figure 1 A magnified structural diagram at point A;

[0019] Figure 3 This is an exploded structural diagram of the present invention.

[0020] The diagram shows: 1. Bottom layer; 2. Fabric layer; 3. Component A filling pack; 4. Component B filling pack; 5. Easily broken edge; 6. Component A; 7. Component B; 8. Fine pores; 9. Semi-circular groove. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0023] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] like Figure 1-3 As shown, a method for preparing a two-component solvent-free PU elastic layer according to the present invention includes a base layer 1, a top layer 2, multiple A-component filler packs 3 and multiple B-component filler packs 4, and is carried out according to the following steps:

[0027] S1. The plurality of A-component filler packs 3 and the plurality of B-component filler packs 4 are pasted between the bottom layer 1 and the fabric layer 2, and the plurality of A-component filler packs 3 and the plurality of B-component filler packs 4 are evenly staggered with each other;

[0028] S2. A fragility edge 5 is engraved on the outside of the A component filler 3 and the B component filler 4. The fragility edge 5 is a complete circle structure. The fragility edge 5 divides the A component filler 3 and the B component filler 4 into upper and lower semicircles respectively.

[0029] S3. Fill the A component filling package 3 and the B component filling package 4 with A component 6 and B component 7 respectively, and the quantity ratio of the A component filling package 3 to the B component filling package 4 is 42:65;

[0030] S4. A plurality of fine holes 8 are formed on the bottom layer 1, and the plurality of fine holes 8 are arranged in a uniform array with each other.

[0031] S5. Use a road roller to compact the fabric layer 2, thereby flattening the multiple A-component filler packs 3 and the multiple B-component filler packs 4. The easily broken edge 5 is broken by pressure, allowing the A-component 6 and B-component 7 to fuse together between the bottom layer 1 and the fabric layer 2 to form a two-component PU elastic layer.

[0032] The principle is as follows: the quantity ratio of component A filler bag 3 and component B filler bag 4 is preset. After being flattened by a road roller, component A filler bag 3 and component B filler bag 4 will burst outward through the easily broken edge 5, thereby allowing component A 6 and component B 7 to fuse together. Since component A filler bag 3 and component B filler bag 4 were originally evenly staggered, component A 6 and component B 7 can fuse evenly. The elastic material after fusion will penetrate into the bottom side of the bottom layer 1 through the fine pores 8, thereby adhering firmly to the floor of the sports field. After production, it can be stored for a long time.

[0033] As a further aspect of the present invention: component A 6 is composed of the following components in parts by weight:

[0034]

[0035] The viscosity of component A 6 at room temperature is 4000–6000 mPa·s;

[0036] Component B 7 is composed of the following components in parts by weight:

[0037] 60-85 parts of polyisocyanate;

[0038] 15-40 parts of polymeric diol.

[0039] As a further aspect of the present invention: Preparation of component A 6: Polyether polyol, alkyl sulfonate phenyl ester, and tackifier are added to a reaction vessel and heated to 60-80°C. The reaction vessel is stirred while being vacuumed and dehydrated for 5-8 hours. Then, inorganic filler is added and the mixture is stirred at high speed in the reaction vessel until homogeneous. While stirring, flame retardant, grinding stone powder, calcium oxide, and defoamer are added. After the mixture is completely homogeneous, it is cooled to room temperature. The viscosity is tested and the material is discharged when it meets the requirements, thus obtaining component A 6.

[0040] As a further aspect of the present invention: Preparation of component B 7: Polyisocyanate and polymeric diol are rapidly added to a polymerization reactor, the temperature is slowly raised to 80°C, and the reaction is stirred for 2-3 hours under dry nitrogen atmosphere. Finally, the mixture is cooled to room temperature and discharged to obtain component B 7.

[0041] As a further aspect of the present invention: the bottom surface of the upper semicircle of the A component filler bag 3 and the B component filler bag 4 is a planar structure, and the A component 6 and the B component 7 are respectively filled into the lower semicircle of the A component filler bag 3 and the B component filler bag 4; when compacted by a road roller, the lower semicircle of the A component filler bag 3 and the B component filler bag 4 will burst open, allowing the A component 6 and the B component 7 to fuse together.

[0042] As a further aspect of the present invention: the bottom side of the fabric layer 2 is formed with a plurality of semi-circular grooves 9, and the upper semi-circles of the plurality of A-component filling packs 3 and the plurality of B-component filling packs 7 are correspondingly pasted and fixed in the semi-circular grooves 9; so that after the lower semi-circle bursts open, it can fully diffuse between the fabric layer 2 and the bottom layer 1, ensuring the rapid formation of the elastic layer, while the upper semi-circle itself has a certain degree of elasticity, which can better prevent athletes from getting injured.

[0043] As a further aspect of the present invention: the A component filler pack 3 and the B component filler pack 4 are respectively made of soft silicone.

[0044] As a further aspect of the present invention: the fabric layer 2 is made of transparent acrylic resin.

[0045] This embodiment does not impose any limitation on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A method for preparing a two-component solvent-free PU elastic layer, characterized in that, The process, which includes the base layer, the fabric layer, multiple A-component filler packs, and multiple B-component filler packs, is carried out according to the following steps: S1. Adhere the plurality of A-component filler packs and the plurality of B-component filler packs between the bottom layer and the fabric layer, wherein the plurality of A-component filler packs and the plurality of B-component filler packs are evenly staggered with each other; S2. A breakable edge is engraved on the outer side of the A component filler pack and the B component filler pack. The breakable edge is a complete circle structure. The breakable edge divides the A component filler pack and the B component filler pack into upper and lower semicircles respectively. S3. Fill the A component filling package and the B component filling package with component A and component B respectively, and the quantity ratio of the A component filling package to the B component filling package is 42:65; S4. A plurality of fine holes are formed on the bottom layer, and the plurality of fine holes are arranged in a uniform array with each other. S5. Use a road roller to compact the fabric layer, thereby flattening the multiple A-component filler packs and the multiple B-component filler packs. The easily broken edge is broken by pressure, allowing the A-component and B-component to fuse together between the bottom layer and the fabric layer to form a two-component PU elastic layer. The bottom surface of the upper semicircle of the A component filler bag and the B component filler bag is a planar structure, and the A component and the B component are respectively filled into the lower semicircle of the A component filler bag and the B component filler bag; The bottom side of the fabric layer is formed with several semi-circular grooves, and the upper semi-circles of the multiple A-component filling packs and the multiple B-component filling packs are attached and fixed in the semi-circular grooves one by one.

2. The method for preparing a two-component solvent-free PU elastic layer according to claim 1, characterized in that: Component A is composed of the following components in parts by weight: 50-120 parts of polyether polyol; 50-70 parts of alkyl sulfonate phenyl ester; 40-80 parts of tackifier; 15-30 parts of inorganic filler; 25-40 parts flame retardant; 10-15 parts grinding stone powder; 1-2 parts calcium oxide; 1-2 parts of defoamer; The viscosity of component A at room temperature is 4000–6000 mPa·s; Component B is composed of the following components in parts by weight: 60-85 parts of polyisocyanate; 15-40 parts of polymeric diol.

3. The method for preparing a two-component solvent-free PU elastic layer according to claim 2, characterized in that: Preparation of Component A: Polyether polyol, alkyl sulfonate phenyl ester, and tackifier are added to a reaction vessel and heated to 60-80℃. The reaction vessel is stirred while being vacuumed and dehydrated for 5-8 hours. Then, inorganic filler is added and the mixture is stirred at high speed in the reaction vessel until homogeneous. While stirring, flame retardant, grinding stone powder, calcium oxide, and defoamer are added. After the mixture is completely homogeneous, it is cooled to room temperature. The viscosity is tested and the mixture is discharged when it meets the requirements, thus obtaining Component A.

4. A method for preparing a two-component solvent-free PU elastic layer according to any one of claims 2 or 3, characterized in that: Preparation of component B: Polyisocyanate and polymeric diol are rapidly added to the polymerization reactor, the temperature is slowly raised to 80°C, and the reaction is stirred for 2-3 hours under dry nitrogen atmosphere. Finally, the mixture is cooled to room temperature and discharged to obtain component B.

5. The method for preparing a two-component solvent-free PU elastic layer according to claim 1, characterized in that: The A component filler and the B component filler are both made of soft silicone.

6. The method for preparing a two-component solvent-free PU elastic layer according to claim 1, characterized in that: The fabric layer is made of transparent acrylic resin.

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