Grain covering cloth

Abstract

The grain covering cloth comprises a base cloth layer (2), a white elastic lamination layer (1) bonded to the front face of the base cloth layer (2) and a gray elastic lamination layer (3) bonded to the back face of the base cloth layer (2), and the gram weight of the base cloth layer (2) is 70-160 g / m < 2 >. The elastic lamination layer is directly bonded with the base cloth layer, a padding adhesive can be omitted, the covering cloth structure is simplified, meanwhile, the back-coated gray lamination layer is arranged to reduce the light transmittance, the white elastic lamination layer and the white elastic lamination layer are both subjected to wear-resistant modification, and the base cloth layer is light in weight, environmentally friendly, high in weather resistance, high in mechanical property, good in wear resistance and long in service life; and the application range is wider.

Description

Technical Field

[0001] The present application relates to the technical field of tarpaulin, and in particular to a grain tarpaulin. Background Art

[0002] Tarpaulins used to cover grain should be made from durable, waterproof, and breathable materials. Currently, the four most common tarpaulin materials on the market include PVC-coated fabric, PE-coated fabric, cotton and linen, and canvas. PVC-coated and PE-coated fabrics are synthetic materials that are durable, waterproof, and easy to clean, making them suitable for use in areas with heavy rainfall. Cotton and linen and canvas are more breathable, moisture-resistant, and UV-resistant, making them suitable for use in areas with more pronounced dryness.

[0003] When choosing a tarpaulin, waterproofing is a very important consideration. Generally speaking, PVC-coated fabrics, PE-coated fabrics, and canvas all have some degree of waterproofing, while cotton and linen fabrics require a waterproofing agent to achieve this. When choosing a tarpaulin, you can choose the waterproofing performance that suits your needs.

[0004] Common tarpaulins for covering grain:

[0005] 1. PVC coated cloth: Choosing PVC coated cloth to cover grain can achieve good protection, but because the material is hard, it is not easy to handle and is also difficult to clean.

[0006] 2. PE coated cloth: PE coated cloth is relatively cheap and has good waterproof performance, but its service life is relatively short and it is not wear-resistant.

[0007] 3. Cotton and linen cloth: good air permeability and relatively cheap, but it needs to be coated with a waterproof agent to achieve the purpose of waterproofing and has a short service life.

[0008] 4. Canvas: Good air permeability, moisture-proof and UV-resistant, but the price is relatively high, it is not resistant to acid and alkali environments and has a short service life.

[0009] When choosing a tarpaulin suitable for covering grain, you should not only consider factors such as material, density and waterproof performance, but also choose a tarpaulin of the right size and the correct installation method to ensure that the tarpaulin tightly covers the grain and effectively protects the grain from environmental damage.

[0010] Choosing the right tarpaulin for your grain storage is crucial. It not only protects the grain from the elements but also extends its lifespan. Consider factors like the material, density, and waterproof properties of the tarpaulin, and choose the right one based on your needs.

[0011] Therefore, a new technical solution is urgently needed to solve at least one of the above technical problems. Summary of the Invention

[0012] The purpose of this application is to provide a grain tarpaulin, in which the white elastic coating layer and the gray elastic coating layer are directly bonded to the base fabric layer, which can eliminate the need for dipping adhesive and simplify the structure of the tarpaulin. At the same time, the gray elastic coating layer is set to reduce the light transmittance. The base fabric is light and environmentally friendly, has strong weather resistance, strong mechanical properties, good wear resistance, a long service life, and a wider range of applications.

[0013] In order to achieve the above technical objectives and meet the above technical requirements, the technical solution adopted in this application is: a grain tarpaulin, characterized in that it includes:

[0014] Base fabric layer, the front side of the base fabric layer is bonded with at least a white elastic coating layer, and the base fabric layer has a gram weight of 70 to 160 g / m 2 ;

[0015] A grey elastic coating layer is bonded to the back of the base fabric layer and is used to reduce light transmittance.

[0016] As a preferred technical solution, the weight of the white elastic coating layer is 60-100 g / m 2 .

[0017] As a preferred technical solution, the weight of the gray elastic coating layer is 50 to 80 g / m 2 .

[0018] As a preferred technical solution, the surface of the white elastic coating layer is smooth.

[0019] As a preferred technical solution, the surface of the gray elastic coating layer has non-smooth textures.

[0020] As a preferred technical solution, the non-smooth texture is one of fine velvet, coarse velvet, frosted, flash point, diamond silk surface, honeycomb type, and leather texture.

[0021] As a preferred technical solution, the base fabric layer has a gram weight of 70 to 160 g / m 2 .

[0022] As a preferred technical solution, the gram weight of the grain tarpaulin is 200-320g / m 2 .

[0023] As a preferred technical solution, the base fabric layer is made of at least one of polyester, polypropylene, nylon, spandex, acrylic, ultra-high molecular weight polyethylene fiber, and glass fiber.

[0024] The beneficial effects of this application are:

[0025] 1) The white and gray elastic coating layers are directly bonded to the base fabric, eliminating the need for adhesive dips and simplifying the tarpaulin structure and production process. A back-coated gray coating layer reduces light transmittance, resulting in a lightweight, environmentally friendly base fabric with strong weather resistance, excellent mechanical properties, and abrasion resistance, resulting in a long service life and a wider range of applications.

[0026] 2) The weight of the white elastic coating layer is reasonable, not too thick to affect the winding or bending of the tarpaulin, and not too thin to affect the waterproof covering effect;

[0027] 3) The weight of the gray elastic coating layer is reasonable, not too thin to cause poor shading effect, and not too thick to increase costs;

[0028] 4) The smooth texture of the white elastic coating layer helps prevent surface water accumulation and seepage; the non-smooth texture of the gray elastic coating layer can create a certain air-conducting gap on the contact surface with the grain, which improves air permeability and prevents grain loss caused by suffocation and warming;

[0029] 5) Thermoplastic elastomer materials are added to the front and back elastic coating layers for modification, which improves the flexibility and low temperature resistance of the tarpaulin;

[0030] 6) The weight of the base fabric layer has a great influence on the performance of the grain tarpaulin. If the base fabric layer is too thin, it will affect the physical properties such as the tensile strength of the grain tarpaulin. If it is too thick, it will limit the flexibility and application range of the grain tarpaulin. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural diagram of a grain tarpaulin provided in an embodiment of the present application.

[0032] exist Figure 1 Among them, 1. White elastic coating layer; 2. Base fabric layer; 3. Gray elastic coating layer. DETAILED DESCRIPTION

[0033] The present application is further described below with reference to the accompanying drawings.

[0034] The same or similar numbers in the drawings of the embodiments of the present application correspond to the same or similar parts; in the description of the present application, it should be understood that if the terms "head", "tail", "top", "bottom", "left", "right", "front", "back", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] See also Figure 1 One embodiment of the present application provides a grain tarpaulin, comprising a base fabric layer 2, wherein at least a white elastic coating layer 1 is bonded to the front of the base fabric layer 2, and the base fabric layer 2 has a gram weight of 70 to 160 g / m 2 ; A gray elastic coating layer 3 bonded to the back of the base fabric layer 2.

[0036] Conventional fabric layers 2 require adhesive coating before being bonded to an elastic coating layer. The present invention utilizes an elastic coating layer bonded directly to the fabric layer 2, eliminating the need for adhesive dipping and simplifying the tarpaulin structure and production process. This makes the tarpaulin suitable for extended outdoor use without the risk of adhesive bubbling. Of course, the present invention's fabric layer does not preclude the addition of adhesive; a small amount of adhesive can also be applied to enhance adhesion. The addition of a gray elastic coating layer reduces light transmittance, resulting in a lightweight, environmentally friendly fabric layer with strong weather resistance, excellent mechanical properties, excellent wear resistance, and a long service life, extending its applicability.

[0037] Specifically, the material of the white elastic coating layer 1 is a thermoplastic elastomer, and the raw materials of the thermoplastic elastomer include 90-130 parts of a polyolefin composition, 5-20 parts of an adhesion modifier, 5-15 parts of a silicone masterbatch, 6-12 parts of a white masterbatch, 2-6 parts of a PPA masterbatch, and 0.1-3 parts of an antioxidant. The polyolefin composition is POE, PE, PP, and EBA, and the weight ratio of POE, PE, PP, and EBA is (1-5): (2-5): (6-11): (2-5). The peel strength between the white elastic coating layer 1 and the base fabric layer 2 is not less than 40N / 5cm. The addition of silicone masterbatch and PPA masterbatch to the white elastic coating layer 1 not only improves the wear resistance of the white elastic coating layer and extends the service life of the product, but also has certain slippery and water-repellent properties, making it easy to clean the surface.

[0038] The material of the gray elastic coating layer 3 is a thermoplastic elastomer. The raw materials of the thermoplastic elastomer include 90-130 parts of a polyolefin composition, 5-20 parts of an adhesive modifier, 5-15 parts of a silicone masterbatch, 10-15 parts of a gray masterbatch, 2-6 parts of a PPA masterbatch, and 0.1-3 parts of an antioxidant. The polyolefin composition is POE, PE, PP, and EBA. The weight ratio of POE, PE, PP, and EAA is (1-5): (2-5): (6-11): (2-5). The peel strength between the gray elastic coating layer 3 and the base fabric layer 2 is not less than 40N / 5cm. A gray masterbatch containing metal powder is also added to the gray elastic coating layer 3, which can not only reduce the light transmittance, increase the shading degree, and prevent damage to the grain caused by strong light exposure, high temperature, etc.; but also greatly improve the wear resistance and extend the service life of the product.

[0039] The adhesive modifier uses Japan Mitsui Chemicals' Admer adhesive polyolefin resin, and the antioxidant is a hindered phenolic antioxidant. The front white elastic coating layer 1 incorporates silicone and PPA masterbatches, which not only improve the wear resistance of the coating and extend the product's service life, but also provide a certain degree of slip and water repellency, making the surface easier to clean. The reverse gray elastic coating layer 3 also incorporates a gray masterbatch containing metal powder. This not only reduces light transmittance and increases light shielding, preventing damage to grain from strong sunlight and high temperatures, but also significantly improves wear resistance and extends the product's service life. The elastic coating layer is modified with a thermoplastic elastomer material to enhance the tarpaulin's flexibility and low-temperature resistance.

[0040] like Figure 1 As shown, in some embodiments, the weight of the white elastic coating layer 1 is 60 to 100 g / m 2 The weight of the white elastic coating layer 1 is reasonable. When the weight of the coating is less than 60g / m 2 When the coating layer is higher than 100g / m 2 When the tarpaulin is thicker, it will affect the thickness of the tarpaulin, affecting the winding or bending. For cost considerations, there is no need to increase the gram weight to 100g / m 2 above.

[0041] like Figure 1 As shown, in some embodiments, the gray elastic coating layer 3 has a coating weight of 50 to 80 g / m 2 The weight of the gray elastic coating layer 3 is reasonable. When the weight of the gray elastic coating layer 3 is less than 50g / m 2 When the gray elastic coating layer 3 does not provide good covering performance, it is easy to have problems with light and heat transmission. When the weight of the gray elastic coating layer 3 is higher than 80g / m 2 When the tarpaulin is thicker, it will affect the thickness of the tarpaulin, affect the winding or bending, and the shading effect will not be significantly improved. For cost considerations, there is no need to increase the gram weight to 80g / m 2 above.

[0042] like Figure 1 As shown, in some embodiments, the surface of the white elastic coating layer 1 is a smooth texture, and the surface of the gray elastic coating layer 3 is a non-smooth texture, and the non-smooth texture is one of fine velvet, coarse velvet, frosted, flash point, diamond silk surface, honeycomb type, and leather texture.

[0043] The smooth texture of the white elastic coating layer 1 is beneficial to preventing surface water accumulation and seepage, and the non-smooth texture of the gray elastic coating layer 3 can create a certain air-conducting gap with the contact surface of the grain, which has good air permeability and prevents the grain from being suffocated and heated and causing losses.

[0044] like Figure 1 As shown, in some embodiments, the base fabric layer 2 has a gram weight of 70 to 160 g / m 2 The thickness of the base fabric layer 2 has a great influence on the performance of the grain tarpaulin. If the base fabric layer 2 is too light, it will affect the physical properties such as the tensile strength of the grain tarpaulin. If it is too thick, it will limit the flexibility and application range of the grain tarpaulin. Furthermore, the base fabric layer 2 has a gram weight of 200 to 320 g / m 2 , small weight, light weight, high tensile strength, good tear resistance, good bending resistance, water and moisture resistance, environmental protection and hygiene.

[0045] like Figure 1 As shown, in some embodiments, the base fabric layer 2 is made of at least one of polyester, polypropylene, nylon, spandex, acrylic, ultra-high molecular weight polyethylene (UHMWPE) fiber, and glass fiber. Polyester base fabric is generally selected because it is economical, environmentally friendly, durable, and has excellent weather resistance, strength, tear resistance, abrasion resistance, and folding resistance.

[0046] like Figure 1 As shown, in some embodiments, an adhesive is further provided between the elastic coating layer and the base fabric layer 2. In some extreme outdoor conditions, such as cold weather, a small amount of adhesive will be applied. At the same time, it is shown that the grain tarpaulin of the present invention does not exclude the use of adhesives. Since the elastic coating layer itself can be bonded to the base fabric layer 2, only a small amount of adhesive is needed to achieve a good effect. Compared with the traditional elastic coating layer, the risk of blistering is smaller.

[0047] The above embodiments are merely descriptions for the purpose of clearly illustrating the present application, and are not limitations on the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above descriptions. It is not necessary and impossible to enumerate all implementation methods here, and the obvious changes or modifications derived therefrom are still within the scope of protection of the present application.

Claims

1. A grain awning cloth, characterized in that: include: A base fabric layer (2), wherein the front side of the base fabric layer (2) is bonded with at least a white elastic coating layer (1), and the base fabric layer (2) has a gram weight of 70-160 g / m 2 ; A grey elastic coating layer (3) bonded to the back side of the base fabric layer (2) for reducing light transmittance.

2. The grain awning cloth according to claim 1, characterized in that: The weight of the white elastic coating layer (1) is 60-100 g / m 2 .

3. The grain awning cloth according to claim 1, characterized in that: The gray elastic coating layer (3) has a coating weight of 50-80 g / m 2 .

4. The grain awning cloth according to claim 1, characterized in that: The surface of the white elastic coating layer (1) is smooth and textured.

5. The grain awning cloth according to claim 1, characterized in that: The surface of the grey elastic coating layer (3) has a non-smooth texture.

6. The grain awning cloth according to claim 5, characterized in that: The non-smooth texture is one of fine velvet, coarse velvet, frosted, flash point, diamond silk surface, honeycomb type, and leather texture.

7. The grain awning cloth according to claim 1, characterized in that: The base fabric layer (2) has a gram weight of 70-160 g / m 2 .

8. The grain awning cloth according to claim 7, characterized in that: The gram weight of the grain awning cloth is 200-320g / m 2 .

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