Anti-aging PVC composite pipe

Abstract

The utility model relates to PVC composite pipe technical field discloses an anti -aging PVC composite pipe, including composite pipe body, the composite pipe body includes base layer, the inner wall of base layer is provided with first adhesive layer, the inner wall of first adhesive layer is provided with inner layer, the inner wall of inner layer is provided with inner coating, the outer wall of base layer is provided with second adhesive layer. In the utility model, the food -grade epoxy resin of inner coating is used to ensure the safety of conveying medium, the corrosion resistance of inner layer is enhanced by using chlorinated polyvinyl chloride, the PVC-U material of base layer provides core structure support, the ASA material of anti -aging outer layer blocks ultraviolet rays and other aging factors, and meanwhile, the polyurethane of first adhesive layer, the ethylene -vinyl acetate hot melt adhesive of second adhesive layer are matched, so as to ensure that each layer is tightly combined, avoid delamination, solve the problem that the traditional PVC pipe has poor anti -aging performance, is easily corroded by medium or damaged by environment, and has short service life.

Description

Technical Field

[0001] This utility model relates to the field of PVC composite pipe technology, and in particular to an anti-aging PVC composite pipe. Background Technology

[0002] PVC pipe, or polyvinyl chloride pipe, is a plastic pipe made from polyvinyl chloride resin as the main raw material, with the addition of stabilizers, lubricants, and other additives, through extrusion molding. It is widely used in building water supply and drainage, agricultural irrigation, chemical transportation, and electrical wiring. According to its application, it can be divided into drainage, water supply, and wiring types. It features corrosion resistance, light weight, low price, and easy installation. However, its high-temperature resistance is poor, making it unsuitable for transporting high-temperature media. Some rigid PVC pipes also possess a certain degree of strength and can be used in lightly pressure-bearing applications. It is currently one of the most widely used plastic pipe materials.

[0003] Traditional PVC pipes are mostly made of a single material, have poor UV resistance and weather resistance, and are prone to aging and cracking when exposed to the outdoors for a long time, resulting in a short service life. In addition, the inner wall has limited corrosion resistance, and is easily corroded when transporting corrosive media such as acids, alkalis and chemicals, which affects the purity of the media and the life of the pipe. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an anti-aging PVC composite pipe, which aims to improve the problems of poor anti-aging performance, susceptibility to media corrosion or environmental damage, and short service life of traditional PVC pipes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an anti-aging PVC composite pipe, comprising a composite pipe body, the composite pipe body comprising a base layer, the inner wall of the base layer being provided with a first adhesive layer, the inner wall of the first adhesive layer being provided with an inner layer, the inner wall of the inner layer being provided with an inner coating layer, the outer wall of the base layer being provided with a second adhesive layer, and the outer wall of the second adhesive layer being provided with an anti-aging outer layer.

[0006] By adopting the above technical solution, the food-grade epoxy resin used in the inner coating ensures the safety of the transported medium, and the chlorinated polyvinyl chloride used in the inner layer enhances corrosion resistance; the PVC-U material used in the base layer provides core structural support; the ASA material used in the anti-aging outer layer blocks aging factors such as ultraviolet rays, and at the same time, the polyurethane used in the first adhesive layer and the ethylene-vinyl acetate hot melt adhesive used in the second adhesive layer ensure that each layer is tightly bonded and avoids delamination, thus solving the problems of poor anti-aging performance, easy damage from media corrosion or environmental impact, and short service life of traditional PVC pipes.

[0007] Preferably, the inner coating is made of food-grade epoxy resin coating with a thickness of 0.1 to 0.2 mm.

[0008] Preferably, the inner layer is made of chlorinated polyvinyl chloride material with a thickness of 1-2 mm.

[0009] Preferably, the first adhesive layer is made of polyurethane adhesive and has a thickness of 0.05 to 0.1 mm.

[0010] Preferably, the base layer is made of PVC-U material with a thickness of 3 to 8 mm.

[0011] Preferably, the second adhesive layer is made of ethylene-vinyl acetate hot melt adhesive and has a thickness of 0.05 to 0.1 mm.

[0012] Preferably, the anti-aging outer layer is made of ASA material with a thickness of 0.5 to 1 mm.

[0013] This utility model has the following beneficial effects: 1. In this utility model, the food-grade epoxy resin used in the inner coating ensures the safety of the transported medium, and the chlorinated polyvinyl chloride used in the inner layer enhances corrosion resistance; the PVC-U material used in the base layer provides core structural support; the ASA material used in the anti-aging outer layer blocks aging factors such as ultraviolet rays, and at the same time, the polyurethane used in the first adhesive layer and the ethylene-vinyl acetate hot melt adhesive used in the second adhesive layer ensure that each layer is tightly bonded and avoids delamination, thus solving the problems of poor anti-aging performance, easy damage from media corrosion or environmental influences, and short service life of traditional PVC pipes. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of an anti-aging PVC composite pipe proposed in this utility model; Figure 2 This is a side sectional view of an anti-aging PVC composite pipe proposed in this utility model; Figure 3 This is a partial structural diagram of the composite pipe body of an anti-aging PVC composite pipe proposed in this utility model; Figure 4 This is a schematic diagram of the composite pipe structure of an anti-aging PVC composite pipe proposed in this utility model.

[0015] Legend: 1. Composite pipe body; 101. Inner coating; 102. Inner layer; 103. First adhesive layer; 104. Base layer; 105. Second adhesive layer; 106. Anti-aging outer layer. Detailed Implementation

[0016] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] Reference Figure 1 - Figure 4 An embodiment of this utility model is provided: an anti-aging PVC composite pipe, including a composite pipe body 1, the composite pipe body 1 including a base layer 104, the inner wall of the base layer 104 is provided with a first adhesive layer 103, the inner wall of the first adhesive layer 103 is provided with an inner layer 102, the inner wall of the inner layer 102 is provided with an inner coating layer 101, the outer wall of the base layer 104 is provided with a second adhesive layer 105, and the outer wall of the second adhesive layer 105 is provided with an anti-aging outer layer 106.

[0018] Specifically, the composite pipe body 1 is the core structure of the pipeline. Through multi-layer composite design, it achieves multi-functional characteristics such as anti-aging and corrosion resistance. The multi-layer structure of the composite pipe body 1 has a clear division of labor from the inside to the outside. The inner layer 102 and the inner coating layer 101 ensure the safety of the transported medium, the base layer 104 provides structural strength, and the anti-aging outer layer 106 and the adhesive layer enhance the anti-aging performance. The overall design takes into account both practicality and durability.

[0019] Reference Figure 4 The inner coating 101 is made of food-grade epoxy resin coating with a thickness of 0.1-0.2 mm; the inner layer 102 is made of chlorinated polyvinyl chloride material with a thickness of 1-2 mm; the first adhesive layer 103 is made of polyurethane adhesive with a thickness of 0.05-0.1 mm; the base layer 104 is made of PVC-U material with a thickness of 3-8 mm; the second adhesive layer 105 is made of ethylene-vinyl acetate hot melt adhesive with a thickness of 0.05-0.1 mm; and the anti-aging outer layer 106 is made of ASA material with a thickness of 0.5-1 mm.

[0020] Specifically, the inner coating 101 uses food-grade epoxy resin that directly contacts the transported medium, possessing non-toxic and acid / alkali resistant properties to ensure the purity of the medium; the inner layer 102 uses chlorinated polyvinyl chloride, which has better temperature resistance and corrosion resistance than ordinary PVC, enhancing the pipeline's inner wall's resistance to media erosion; the first adhesive layer 103 uses polyurethane adhesive to firmly bond the inner layer 102 to the base layer 104, preventing delamination; the base layer 104 uses PVC-U as the main body of the pipeline, providing high-strength structural support, with a thickness design adapted to different pressure scenarios; the second adhesive layer 105 uses ethylene-vinyl acetate hot melt adhesive to bond the base layer 104 to the anti-aging outer layer 106, with strong adhesion and good weather resistance; the anti-aging outer layer 106 uses ASA material, which has excellent UV resistance and weather resistance, effectively blocking the aging effects of sunlight and environmental factors on the base layer 104, extending the pipeline's service life.

[0021] Working principle: When the anti-aging PVC composite pipe is in operation, the conveying medium comes into direct contact with the inner coating 101. The food-grade epoxy resin material ensures that the medium is safe and uncontaminated. The chlorinated polyvinyl chloride used in the inner layer 102 further enhances the corrosion resistance of the inner wall and resists long-term erosion by the medium. The base layer 104 uses PVC-U material as the main structure to withstand the pressure inside and outside the pipe and ensure structural strength. Aging factors such as ultraviolet rays and oxygen in the external environment are blocked by the ASA material used in the anti-aging outer layer 106. Its excellent weather resistance protects the base layer 104 from corrosion. The ethylene-vinyl acetate hot melt adhesive used in the second adhesive layer 105 ensures that the anti-aging outer layer 106 is tightly bonded to the base layer 104 and avoids delamination. The polyurethane adhesive used in the first adhesive layer 103 ensures a stable connection between the inner layer 102 and the base layer 104 and prevents the medium from penetrating and causing structural damage.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 anti-aging PVC composite pipe, comprising a composite pipe body (1), characterized in that: The composite pipe body (1) includes a base layer (104), the inner wall of the base layer (104) is provided with a first adhesive layer (103), the inner wall of the first adhesive layer (103) is provided with an inner layer (102), the inner wall of the inner layer (102) is provided with an inner coating layer (101), the outer wall of the base layer (104) is provided with a second adhesive layer (105), and the outer wall of the second adhesive layer (105) is provided with an anti-aging outer layer (106).

2. The anti-aging PVC composite pipe according to claim 1, characterized in that: The inner coating (101) is made of food-grade epoxy resin coating with a thickness of 0.1 to 0.2 mm.

3. The anti-aging PVC composite pipe according to claim 1, characterized in that: The inner layer (102) is made of chlorinated polyvinyl chloride material with a thickness of 1-2 mm.

4. The anti-aging PVC composite pipe according to claim 1, characterized in that: The first adhesive layer (103) is made of polyurethane adhesive and has a thickness of 0.05 to 0.1 mm.

5. The anti-aging PVC composite pipe according to claim 1, characterized in that: The base layer (104) is made of PVC-U material with a thickness of 3 to 8 mm.

6. The anti-aging PVC composite pipe according to claim 1, characterized in that: The second adhesive layer (105) is made of ethylene-vinyl acetate hot melt adhesive and has a thickness of 0.05 to 0.1 mm.

7. The anti-aging PVC composite pipe according to claim 1, characterized in that: The anti-aging outer layer (106) is made of ASA material and has a thickness of 0.5 to 1 mm.

Images