Antibacterial five-layer fiber composite pipe

Abstract

The utility model provides an antibacterial five-layer fiber composite pipe, which solves the problems of poor pressure bearing effect and the like of a composite pipe, and comprises a pipe, an outermost layer made of polypropylene material is arranged on the outermost side of the pipe, a secondary outer layer made of fiber reinforced random copolymer polypropylene material is arranged on the inner side of the outermost layer, and a middle layer made of polypropylene material is arranged on the inner side of the secondary outer layer. A secondary inner layer made of a fiber-reinforced polypropylene random copolymer material is arranged on the inner side of the middle layer; and the secondary inner layer is provided with an innermost layer made of an antibacterial material. The utility model has the advantages of good pressure-bearing effect, stable structure and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipes, and in particular relates to an antibacterial five-layer fiber composite pipe. Background Art

[0002] In the field of home improvement, the hygiene and safety of piping systems have always been a focus of consumer attention. Traditional home improvement piping materials, such as PVC and PP-R, have good physical properties and durability. However, during long-term use, their inner walls are prone to the growth of microorganisms such as bacteria and mold, which not only affects water quality but also poses a potential threat to the health of residents. This problem is particularly prominent in humid environments such as kitchens and bathrooms. To address this shortcoming of traditional home improvement piping materials, researchers have begun to devote themselves to the development of new composite pipes with antibacterial functions. Antibacterial composite pipes can effectively inhibit or kill microorganisms on the inner wall of the pipe by adding or coating substances with antibacterial activity to the pipe, thereby maintaining clean and hygienic water quality. However, in actual use, the strength and stability of existing antibacterial pipes are poor, and they cannot meet the requirements of high-pressure and high-flow situations.

[0003] To address the shortcomings of existing technologies, researchers have conducted extensive research and proposed various solutions. For example, a Chinese patent document [202121884296.X] discloses a UV-resistant fiber-composite polypropylene tube with a five-layer structure, consisting of an inner tube layer, a second layer, a third layer, a fourth layer, and an outermost layer. The inner tube layer is an antibacterial composite polypropylene layer, the second layer is a polypropylene layer, the third layer is a silicate fiber-composite polypropylene layer, the fourth layer is a light-blocking composite polypropylene layer, and the outermost layer is a UV-resistant composite polypropylene layer.

[0004] The above solution solves the problem of antibacterial effect inside the pipe to a certain extent, but the solution still has many shortcomings, such as being unsuitable for high-pressure and high-flow situations. Summary of the Invention

[0005] The purpose of the utility model is to solve the above problems and provide an antibacterial five-layer fiber composite pipe with reasonable design and good pressure-bearing effect.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: an antibacterial five-layer fiber composite tube, including a tube, an outermost layer of polypropylene material is arranged on the outermost side of the tube, a sub-outer layer of fiber-reinforced random copolymer polypropylene material is arranged on the inner side of the outermost layer, a middle layer of polypropylene material is arranged on the inner side of the sub-outer layer, a sub-inner layer of fiber-reinforced random copolymer polypropylene material is arranged on the inner side of the middle layer, and the sub-inner layer is provided with an innermost layer of antibacterial material.

[0007] In the above-mentioned antibacterial five-layer fiber composite tube, the thickness ratio of the outermost layer, the second outermost layer, the middle layer, the second innermost layer and the innermost layer is 2.25:2.25:2.25:2.25:1.

[0008] In the above-mentioned antibacterial five-layer fiber composite tube, the outermost layer includes a main cavity extending axially and auxiliary cavities distributed on both sides of the main cavity. The main cavity and the auxiliary cavity are arranged symmetrically relative to the tube.

[0009] In the above-mentioned antibacterial five-layer fiber composite tube, the cross-sections of the main cavity and the auxiliary cavity are T-shaped, and the cross-sectional area of ​​the main cavity is larger than the cross-sectional area of ​​the auxiliary cavity.

[0010] In the above-mentioned antibacterial five-layer fiber composite tube, the inner and outer sides of the sub-outer layer and the sub-inner layer are wavy respectively, and the sub-outer layer and the sub-inner layer have limiting protrusions arranged equidistantly along the axial direction, and the limiting protrusions are circumferentially surrounding the sub-outer layer and the sub-inner layer.

[0011] In the above-mentioned antibacterial five-layer fiber composite tube, a pressure-bearing structure is built into the middle layer, and an adhesion layer made of polyurethane material is provided between the middle layer and the sub-outer layer and the sub-inner layer.

[0012] In the above-mentioned antibacterial five-layer fiber composite tube, the pressure-bearing structure includes a pressure-bearing cavity arranged in the middle layer, a reinforcement layer with a porous structure is built into the pressure-bearing cavity, and the reinforcement layer and the middle layer are integrally formed.

[0013] In the above-mentioned antibacterial five-layer fiber composite tube, the innermost layer is made of PPR material and coated with nanosilver.

[0014] In the above-mentioned antibacterial five-layer fiber composite tube, the thickness of the innermost layer is 0.5-1.8 mm.

[0015] In the above-mentioned antibacterial five-layer fiber composite tube, the sub-outer layer and the sub-inner layer have the same thickness.

[0016] Compared with the existing technology, the advantages of the present invention are: the innermost layer is made of antibacterial layer material, which can effectively inhibit the growth and reproduction of microorganisms such as bacteria and mold, thereby keeping the inside of the pipeline clean and hygienic; two layers of the five-layer structure are made of fiber-reinforced random copolymer polypropylene material combined with the cavity structure to enhance the strength and stability of the pipeline, making it more suitable for high-pressure and high-flow occasions, and at the same time can resist the erosion of various chemical substances and extend the service life; the entire pipe can be extruded and formed, reducing processing difficulty and reducing processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a partial cross-sectional view of the utility model;

[0019] Figure 3 It is another partial cross-sectional view of the utility model;

[0020] In the figure, there is a pipe 1, an outermost layer 2, a main cavity 21, a secondary cavity 22, a secondary outer layer 3, a limiting protrusion 31, a middle layer 4, an adhesion layer 41, a pressure-bearing cavity 42, a secondary inner layer 5, and an innermost layer 6. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0022] like Figure 1-3 As shown, an antibacterial five-layer fiber composite tube includes a tube 1 with a composite structure. The main body of the tube 1 is made of polypropylene to ensure structural strength and corrosion resistance. The outermost layer 2 of the tube 1 is provided with a polypropylene outermost layer 2 to maintain the tube structure of the tube 1 under pressure. The inner side of the outermost layer 2 is provided with a sub-outer layer 3 of fiber-reinforced random copolymer polypropylene. The inner side of the sub-outer layer 3 is provided with a middle layer 4 of polypropylene. The inner side of the middle layer 4 is provided with a sub-inner layer 5 of fiber-reinforced random copolymer polypropylene. The sub-inner layer 5 is provided with an innermost layer 6 of antibacterial material, which is in direct contact with the fluid to ensure antibacterial effect. The sub-outer layer 3 and the sub-inner layer 5 provide additional support torque to the middle layer 4, ensuring that the tube 1 maintains normal fluid transmission in high-pressure and high-flow situations.

[0023] Specifically, in order to obtain the best supporting strength, it is necessary to limit the thickness of each layer of the pipe 1, where the thickness ratio of the outermost layer 2, the sub-outer layer 3, the middle layer 4, the sub-inner layer 5 and the innermost layer 6 is 2.25:2.25:2.25:2.25:1. The thickness of the outermost layer 2, the sub-outer layer 3, the middle layer 4 and the sub-inner layer 5 are kept consistent to maintain the stability of the composite layer, and the innermost layer 6 is relatively independent and has little effect on the overall pressure-bearing capacity.

[0024] More specifically, unlike conventional pipe structures, the outermost layer 2 comprises an axially extending main cavity 21 and secondary cavities 22 on either side of the main cavity 21. The main cavity 21 and secondary cavities 22 are arranged symmetrically with respect to the pipe 1. The evenly distributed cavities do not affect the overall pressure-bearing capacity of the outermost layer 2, but rather increase its internal surface area, improve its tensile strength, and achieve lightweighting of the pipe 1.

[0025] Furthermore, when the pressure is too high, a certain buffer margin is left in the internal channel of the pipe 1, wherein the main cavity 21 and the auxiliary cavity 22 have a T-shaped cross-section, and the cross-sectional area of ​​the main cavity 21 is larger than the cross-sectional area of ​​the auxiliary cavity 22. The main cavity 21 and the auxiliary cavity 22 can undergo a certain deformation, thereby maintaining the structural integrity of the composite pipe.

[0026] Furthermore, the inner and outer sides of the sub-outer layer 3 and the sub-inner layer 5 are wavy, and the sub-outer layer 3 and the sub-inner layer 5 have axially equidistantly spaced limiting protrusions 31 that circumferentially surround the sub-outer layer 3 and the sub-inner layer 5. The wavy inner and outer sides and the limiting protrusions 31 enhance the fit of the sub-outer layer 3 and the sub-inner layer 5 with other layers, preventing circumferential or axial misalignment.

[0027] In addition, compared to conventional tube structures, the middle layer 4 in this embodiment has a built-in pressure-bearing structure, and a polyurethane adhesive layer 41 is provided between the middle layer 4 and the sub-outer layer 3 and sub-inner layer 5. Adhesion layer 41 has good affinity with polypropylene, ensuring the adhesion stability between the sub-outer layer 3 and sub-inner layer 5 and the middle layer 4.

[0028] Unlike the hollow structure within the outermost layer 2, the pressure-bearing structure of the middle layer 4 includes a pressure-bearing cavity 42 disposed within the middle layer 4. This cavity 42 houses a porous reinforcement layer 43, which is integrally formed with the middle layer 4. Each pressure-bearing cavity 42 is relatively independent and enclosed, and the reinforcement layer 43 maintains the cavity structure, giving the middle layer 4 a strong resistance to deformation.

[0029] It can be seen that the innermost layer 6 is made of PPR material and coated with nano-silver to achieve an antibacterial effect. Other antibacterial coatings can be selected according to actual needs.

[0030] Obviously, the thickness of the innermost layer 6 is 0.5-1.8 mm, preferably 0.7 mm.

[0031] Preferably, the sub-outer layer 3 and the sub-inner layer 5 have the same thickness and are reinforced with short glass fibers, thereby improving the overall impact resistance and heat resistance of the composite pipe and extending the overall service life.

[0032] To sum up, the principle of this embodiment is that the innermost layer 6 is made of polypropylene as a whole, and is divided into the outermost layer 2, the sub-outer layer 3, the middle layer 4, the sub-inner layer 5 and the innermost layer 6 from the outside to the inside, among which the sub-outer layer 3 and the sub-inner layer 5 are fiber reinforced to improve the structural strength, thereby ensuring the stable operation of the pipe 1 under high pressure and high flow conditions.

[0033] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0034] Although this document frequently uses terms such as tube 1, outermost layer 2, main cavity 21, auxiliary cavity 22, sub-outer layer 3, limiting protrusion 31, middle layer 4, adhesive layer 41, pressure-bearing cavity 42, sub-inner layer 5, and innermost layer 6, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. An antibacterial five-layer fiber composite tube, comprising a tube (1), characterized in that: The outermost side of the pipe (1) is provided with an outermost layer (2) made of polypropylene material, the inner side of the outermost layer (2) is provided with a sub-outer layer (3) made of fiber-reinforced random copolymer polypropylene material, the inner side of the sub-outer layer (3) is provided with a middle layer (4) made of polypropylene material, the inner side of the middle layer (4) is provided with a sub-inner layer (5) made of fiber-reinforced random copolymer polypropylene material, and the sub-inner layer (5) is provided with an innermost layer (6) made of antibacterial material.

2. The antibacterial five-layer fiber composite tube according to claim 1, characterized in that: The thickness ratio of the outermost layer (2), the second outermost layer (3), the middle layer (4), the second innermost layer (5) and the innermost layer (6) is 2.25:2.25:2.25:2.25:

1.

3. The antibacterial five-layer fiber composite tube according to claim 1, characterized in that: The outermost layer (2) has a main cavity (21) extending in the axial direction and auxiliary cavities (22) distributed on both sides of the main cavity (21). The main cavity (21) and the auxiliary cavity (22) are arranged in a centrally symmetrical manner relative to the pipe (1).

4. The antibacterial five-layer fiber composite tube according to claim 3, characterized in that: The main cavity (21) and the auxiliary cavity (22) have T-shaped cross-sections, and the cross-sectional area of ​​the main cavity (21) is larger than the cross-sectional area of ​​the auxiliary cavity (22).

5. The antibacterial five-layer fiber composite tube according to claim 1, characterized in that: The inner and outer sides of the sub-outer layer (3) and the sub-inner layer (5) are wavy respectively. The sub-outer layer (3) and the sub-inner layer (5) have limiting protrusions (31) arranged equidistantly along the axial direction. The limiting protrusions (31) surround the sub-outer layer (3) and the sub-inner layer (5) in a circumferential direction.

6. The antibacterial five-layer fiber composite tube according to claim 1, characterized in that: The middle layer (4) has a built-in pressure-bearing structure, and an adhesive layer (41) made of polyurethane is provided between the middle layer (4), the sub-outer layer (3) and the sub-inner layer (5).

7. The antibacterial five-layer fiber composite tube according to claim 6, characterized in that: The pressure-bearing structure comprises a pressure-bearing cavity (42) arranged in the middle layer (4), a reinforcement layer (43) with a porous structure is built into the pressure-bearing cavity (42), and the reinforcement layer (43) and the middle layer (4) are integrally formed.

8. The antibacterial five-layer fiber composite tube according to claim 1, characterized in that: The innermost layer (6) is made of PPR material and coated with nano silver.

9. The antibacterial five-layer fiber composite tube according to claim 8, characterized in that: The thickness of the innermost layer (6) is 0.5-1.8 mm.

10. The antibacterial five-layer fiber composite tube according to claim 1, characterized in that: The sub-outer layer (3) and the sub-inner layer (5) have the same thickness.

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