Low-friction large-flow PE water conveying composite pipe and preparation method thereof

Abstract

The application discloses a low-friction large-flow PE water conveying composite pipe and a preparation method thereof, characterized in that the composite pipe comprises a colored HDPE layer on the outside and a COC-HDPE modified layer on the inside; the colored HDPE layer comprises the following components in parts by weight: 90-100 parts of HDPE resin, 2-2.5 parts of carbon black, 1-3 parts of a processing dispersing aid, and 0.6-1.2 parts of a lubricant; and the COC-HDPE modified layer comprises the following components in parts by weight: 90-100 parts of HDPE resin, 5-10 parts of a cyclic olefin copolymer, 3-5 parts of a processing dispersing aid, and 0.6-1.2 parts of a lubricant. The application has good pressure resistance and weather resistance, reduces surface resistance, and improves water conveying capacity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe materials, in particular to a low-friction large-flow PE water conveying composite pipe material and a preparation method thereof. BACKGROUND

[0002] Polyethylene (PE) pipe is a pipe material extruded from polyethylene resin as the main raw material. Based on the excellent resistance to most chemicals for daily life and industry, the PE pipe is applied from small pipes for natural gas and drinking water to thick-walled large pipes for industrial and urban pipelines. According to the national rural revitalization key work promotion opinions, large and medium-sized irrigation district construction and modernization are to be accelerated, a number of small and medium-sized reservoirs and water diversion, drought-resistant standby water sources and other engineering construction are to be implemented, and farmland water conservancy facilities construction such as farmland and field canal system and connection with backbone projects of irrigation districts are to be strengthened. The PE pipe has been greatly popularized in the field of farmland water conveying and irrigation.

[0003] However, the PE water conveying pipe material on the market currently, especially when conveying water over a long distance, the water flow speed decreases due to the increased friction between the inner wall of the pipe material and the water flow, thereby increasing the energy consumption in the water conveying process. SUMMARY

[0004] The present application aims to overcome the deficiencies of the prior art and provide a low-friction large-flow PE water conveying composite pipe material and a preparation method thereof.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions to achieve:

[0006] A low-friction large-flow PE water conveying composite pipe material, the composite pipe material has a double-layer structure, the outer layer is a colored HDPE layer, and the inner layer is a COC-HDPE modified layer.

[0007] The colored HDPE layer is made of colored modified HDPE material, and the colored modified HDPE material includes the following components in weight parts: 90-100 parts of HDPE resin, 2-2.5 parts of carbon black, 1-2 parts of glycerol, 1-3 parts of processing dispersing agent, and 0.6-1.2 parts of lubricant.

[0008] The COC-HDPE modified layer is made of COC modified HDPE material, and the COC modified HDPE material includes the following components in weight parts: 90-100 parts of HDPE resin, 5-10 parts of cyclic olefin copolymer, 3-5 parts of processing dispersing agent, and 0.6-1.2 parts of lubricant.

[0009] The processing dispersing agent is BYK-110, FS-5118 or BYK163.

[0010] The lubricant is one or more of stearic acid, stearate, paraffin, microcrystalline wax and polyethylene wax.

[0011] The cyclic olefin-based copolymer is 6013F produced by TAP, 6013 by Japan Toyal, 5013 by Japan Toyal, or 6017 by Japan Toyal.

[0012] The ratio between the colored modified HDPE material and the COC modified HDPE material is 8:2, and the colored modified HDPE material and the COC modified HDPE material are melt co-extruded through a double-layer die by an extruder.

[0013] A preparation method of a low-friction large-flow PE water conveying composite pipe material, comprising the following steps:

[0014] The HDPE colored layer material is prepared by mixing 90-100 parts of HDPE resin, 2-2.5 parts of carbon black, 1-2 parts of glycerol, 1-3 parts of a processing dispersing agent, and 0.6-1.2 parts of a lubricant in a mixer, adding the HDPE resin and the glycerol into the mixer and mixing, adding the carbon black, the processing dispersing agent, and the lubricant into the mixer and mixing after the surface of the HDPE resin is fully adhered to the glycerol, and feeding the material into a double-screw extruder and performing strand pelletizing after the material is uniformly mixed to obtain the HDPE colored layer material.

[0015] The COC modified HDPE material is prepared by mixing 90-100 parts of HDPE resin, 5-10 parts of a cyclic olefin-based copolymer, 3-5 parts of a processing dispersing agent, and 0.6-1.2 parts of a lubricant in a mixer, adding the HDPE resin and the cyclic olefin-based copolymer into the mixer and mixing, adding the processing dispersing agent and the lubricant into the mixer and mixing after the surface of the HDPE resin is fully adhered to the cyclic olefin-based copolymer, and feeding the material into a double-screw extruder and performing strand pelletizing after the material is uniformly mixed to obtain the COC modified HDPE material.

[0016] The colored modified HDPE material and the COC modified HDPE material are melt co-extruded through a double-layer die by an extruder at a ratio of 8:2 to obtain a composite pipe material with a colored HDPE layer as an outer layer and a COC-HDPE modified layer as an inner layer.

[0017] Compared with the prior art, the present application has the beneficial effects that: through the double-layer structure design of the pipe material, the outer layer ensures the pressure bearing and weather resistance of the product; the inner layer reduces the surface resistance of the material through material blending, improves the water conveying capacity, and thus reduces the energy consumption in the water conveying process. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the mixer in the present application.

[0019] Figure 2 for Figure 1 an enlarged view of A in FIG. 1;

[0020] Figure 3 for Figure 1 an enlarged view of B in FIG. 1;

[0021] Figure 4 for Figure 1 an enlarged view of C in FIG. 1;

[0022] Figure 5 for Figure 1 an enlarged view of D in FIG. 1;

[0023] Figure 6 a structural schematic diagram of the stirrer in the present application;

[0024] Figure 7 a structural schematic diagram of the rotating seat in the present application;

[0025] Figure 8 a use state schematic diagram of the mixer in the present application.

[0026] The drawings show: 1, first upright column; 2, second upright column; 3, lifting platform; 4, stirring cylinder; 5, cover plate; 6, sealing ring; 7, first notch; 8, stirrer; 9, first screw rod; 10, first screw rod sliding block; 11, fixing frame; 12, stirring motor; 13, material guiding seat; 14, supporting plate; 15, second notch; 16, second screw rod; 17, second screw rod sliding block; 18, sealing plate; 19, accommodating groove; 20, linkage shaft; 21, driven bevel gear one; 22, driving bevel gear; 23, hydraulic cylinder; 24, lifting plate; 25, screw rod motor; 26, roller frame; 27, roller; 28, air pump; 29, inflation pipe; 30, first limiting ring; 31, discharging slope; 32, second limiting ring; 33, air bag; 34, first sealing sheet; 35, second sealing sheet; 36, driving bevel gear; 37, driven bevel gear two; 38, rotating shaft one; 39, first stirring blade; 40, universal connector; 41, first adjusting rod; 42, second adjusting rod; 43, rotating shaft two; 44, positioning head; 45, second stirring blade; 46, third stirring blade; 47, fourth stirring blade; 48, first connecting column; 49, second connecting column; 50, spring; 51, supporting seat; 52, rotating sleeve; 53, ball bearing; 54, positioning groove; 55, telescopic rod. DETAILED DESCRIPTION

[0027] The drawings are referred to in the following detailed description of embodiments of the present application. Figures 1-8 The embodiments of the present application are described in detail.

[0028] Example 1

[0029] The low-friction large-flow PE water conveying composite pipe has a double-layer structure, wherein the outer layer is a colored HDPE layer and the inner layer is a COC-HDPE modified layer.

[0030] The colored modified HDPE material comprises the following components by weight: 90 parts of HDPE resin, 2 parts of carbon black, 1 part of glycerol, 1 part of processing dispersing agent, and 0.6 parts of lubricant.

[0031] The COC modified HDPE material comprises the following components by weight: 90 parts of HDPE resin, 5 parts of cyclic olefin copolymer, 3 parts of processing dispersing agent, and 0.6 parts of lubricant.

[0032] The processing dispersing agent is FS-5118, the lubricant is stearic acid, and the cyclic olefin copolymer is selected from 6013F produced by TAP Company in Germany.

[0033] The ratio between the colored modified HDPE material and the COC modified HDPE material is 8:2, and the colored modified HDPE material and the COC modified HDPE material are melt co-extruded through an extruder via a double-layer mold.

[0034] Example 2

[0035] The low-friction large-flow PE water conveying composite pipe has a double-layer structure, wherein the outer layer is a colored HDPE layer and the inner layer is a COC-HDPE modified layer.

[0036] The colored modified HDPE material comprises the following components by weight: 100 parts of HDPE resin, 2.5 parts of carbon black, 2 parts of glycerol, 3 parts of processing dispersing agent, and 1.2 parts of lubricant.

[0037] The COC modified HDPE material comprises the following components by weight: 100 parts of HDPE resin, 10 parts of cyclic olefin copolymer, 5 parts of processing dispersing agent, and 1.2 parts of lubricant.

[0038] The dispersing agent is BYK-110, the lubricant is polyethylene wax, and the cyclic olefin copolymer is selected from 6013 produced by Borealis Company in Japan.

[0039] The ratio between the colored modified HDPE material and the COC modified HDPE material is 8:2, and the colored modified HDPE material and the COC modified HDPE material are melt co-extruded through an extruder via a double-layer mold.

[0040] The preparation method of the low-friction large-flow PE water conveying composite pipe comprises the following steps:

[0041] Preparation of HDPE colored layer material: the HDPE colored layer material includes the following components by weight: 90-100 parts of HDPE resin, 2-2.5 parts of carbon black, 1-2 parts of glycerol, 1-3 parts of processing dispersing aid, 0.6-1.2 parts of lubricant, the HDPE resin and glycerol are added to a mixer for mixing, after the surface of the HDPE resin is fully adhered to glycerol, the carbon black, processing dispersing aid and lubricant are added to the mixer for mixing, after the mixture is uniformly mixed, the material is fed into a double screw extruder for strand pelletizing to obtain the HDPE colored layer material;

[0042] Preparation of COC modified HDPE material: the COC modified HDPE material includes the following components by weight: 90-100 parts of HDPE resin, 5-10 parts of cyclic olefin copolymer, 3-5 parts of processing dispersing aid, 0.6-1.2 parts of lubricant, the HDPE resin material and cyclic olefin copolymer are added to a mixer for mixing, after the surface of the HDPE resin is fully adhered to the cyclic olefin copolymer, the processing dispersing aid and lubricant are added to the mixer for mixing, after the mixture is uniformly mixed, the material is fed into a double screw extruder for strand pelletizing to obtain the COC modified HDPE material;

[0043] The colored modified HDPE material and the COC modified HDPE material are extruded by a double-layer die through a melt co-extrusion extruder at a ratio of 8:2 to obtain a composite pipe with a colored HDPE layer as the outer layer and a COC-HDPE modified layer as the inner layer.

[0044] The mixer comprises a stirring drum 4, a first stand 1 and a second stand 2 arranged on the left and right sides of the stirring drum 4 respectively, a lifting platform 3 arranged between the upper parts of the first stand 1 and the second stand 2, a hydraulic cylinder 23 arranged on the upper part of the first stand 1, a piston rod lower end of the hydraulic cylinder 23 connected with the lifting platform 3, a fixing frame 11 arranged on the lower part of the lifting platform 3, a stirring motor 12 mounted on the lower part of the fixing frame 11, the stirring motor 12 drivingly connected with a stirrer 8, the lifting platform 3 connected with a cover plate 5 through an extension rod 55, a gap 7 arranged at the middle position of the cover plate 5, the stirrer 8 arranged through the gap 7, the stirrer 8 comprising a rotating shaft 1 38 drivingly connected with the stirring motor 12, a plurality of stirring blades 1 39 arranged on the outer periphery of the rotating shaft 1 38, an adjusting rod 1 41 connected with the rotating shaft 1 38 through a universal connector 40, an adjusting rod 2 42 rotatably arranged on the lower end of the adjusting rod 1 41, a rotating shaft 2 43 connected with the adjusting rod 2 42 through the universal connector 40, a plurality of stirring blades 2 45 arranged on the outer periphery of the rotating shaft 2 43, stirring blades 3 46 and stirring blades 4 47 arranged on one side of the adjusting rod 1 41 and the adjusting rod 2 42 respectively, the stirring blades 3 46 and the stirring blades 4 47 arranged on the same side, a rotating seat arranged on the bottom of the stirring drum 4 and matched with the rotating shaft 2 43, the lower end of the rotating shaft 2 43 inserted into the rotating seat and rotatably connected with the rotating seat, a connecting column 1 48 arranged on the front and back sides of the adjusting rod 1 41, a connecting column 2 49 arranged on the front and back sides of the adjusting rod 2 42, and a spring 50 connected between the connecting column 1 48 and the connecting column 2 49 on the same side. The spring 50 is arranged to make the adjusting rod 1 41 and the adjusting rod 2 42 have an initial inclination, so that the adjusting rod 1 41 and the adjusting rod 2 42 can smoothly rotate when the rotating shaft 1 38 is pressed down, and the adjusting rod 1 41 and the adjusting rod 2 42 have a tendency to return to the initial state when the rotating shaft 1 38 is lifted up.

[0045] The stirring motor 12 drives the rotating shaft 1 38 to rotate, the rotating shaft 1 38 drives the adjusting rod 1 41 and the adjusting rod 2 42 to rotate, and then drives the rotating shaft 2 43 to rotate. The rotating shaft 1 38, the adjusting rod 1 41, the adjusting rod 2 42 and the rotating shaft 2 43 drive the stirring blades 1 39, the stirring blades 3 46, the stirring blades 4 47 and the stirring blades 2 45 to rotate respectively, so that the materials in the stirring drum 4 are stirred and mixed.

[0046] During the stirring process, the stirring blades 1 39 make the materials flow downward, the stirring blades 2 45 make the materials flow upward, and the materials at the middle position are mixed by the stirring blades 3 46 and the stirring blades 4 47. The materials at the upper and lower layers in the stirring drum 4 flow to the middle and are mixed, so that the materials in the stirring drum 4 can be uniformly mixed.

[0047] The lifting platform 3 moves up and down to change the angle between the adjusting rod 41 and the adjusting rod 42, thereby changing the angle of the stirring blade three 46 and the stirring blade four 47, so that the stirring direction of the stirring blade three 46 and the stirring blade four 47 changes, and different stirring intensity is generated. Through this change, the material can be better mixed.

[0048] As preferred, the lifting platform 3 is rotatably provided with a lead screw 9, the lead screw 1 is provided with a lead screw block 10, the upper part of the fixed frame 11 is connected with the lead screw block 10, the side of the lifting platform 3 is provided with a lead screw motor 25, the lead screw motor 25 is connected with the drive of the lead screw 9, the right end of the lead screw 9 extends into the column 2 and is connected with the driving bevel gear 22, the column 2 is rotatably provided with a linkage shaft 20, the upper and lower ends of the linkage shaft 20 are respectively connected with the driven bevel gear one 21 and the driven bevel gear two 37, the bottom of the stirring drum 4 is provided with a material guide seat 13, the inside of the material guide seat 13 is in a downward and inward inclined state, so that the initial material can slide along the inside of the material guide seat 13 after entering the stirring drum 4 to the bottom of the stirring drum 4. The lower part of the material guide seat 13 is provided with a support plate 14, the position below the support plate 14 in the stirring drum 4 is rotatably provided with a lead screw 16, the lead screw 16 is provided with a lead screw block 17, the upper part of the lead screw block 17 is connected with a rotating seat provided on the sealing plate 18, the support plate 14 is provided with a notch 15 at the middle position, the rotating seat is located in the notch 15, and the material guide seat 13 is provided with a receiving groove 19 for inserting the sealing plate 18.

[0049] The lifting platform 3 moves down to the driving bevel gear 22 and the driven bevel gear one 21, at this time, the lead screw motor 25 drives the lead screw 9 to rotate, the lead screw 9 drives the lead screw block 10 to move left and right to adjust the position of the stirrer 8, the driving bevel gear 22 drives the linkage shaft 20 to rotate through the driven bevel gear one 21, the linkage shaft 20 drives the lead screw 16 to rotate through the driven bevel gear two 37 and the driving bevel gear 36. The lead screw 16 drives the lead screw block 17 to move left and right, thereby driving the rotating seat above to move, so that the lower end of the stirrer 8 can move synchronously with the upper end of the stirrer 8, and the two will not deviate.

[0050] By adjusting the position of the stirrer 8 in the stirring drum 4, the material at different positions in the stirring drum 4 can be effectively stirred, so that the material flow can be fully mixed.

[0051] During the movement of the lead screw block 17, the sealing plate 18 can cover the notch 15, thereby preventing the material from falling below the support plate 14. It can not only prevent the influence of the material on the lower components, but also avoid the influence of the lack of material on the subsequent production.

[0052] As preferred, the bottom of the rotating shaft two 43 is provided with a positioning head 44, the rotating seat comprises a support seat 51 and a rotating sleeve 52 located in the support seat 51, a plurality of ball bearings 53 are arranged between the support seat 51 and the rotating sleeve 52, and a positioning groove 54 is formed in the upper portion of the rotating sleeve 52 and matched with the shape of the positioning head 44. When the positioning head 44 is lowered, it can be inserted into the stirring blade two 45, so that the rotating shaft two 43 and the rotating sleeve 52 are relatively fixed, thereby supporting the rotating shaft two 43 and enabling the rotating shaft two 43 to rotate stably.

[0053] As preferred, the side of the column one 1 is provided with a lifting plate 24, the lead screw motor 25 is arranged outside the lifting plate 24, a plurality of roller frames 26 are arranged inside the lifting plate 24, a plurality of rollers 27 are arranged on the roller frames 26 and roll, and the outer periphery of the rollers 27 is in contact with the outside of the column one 1. The lifting plate 24 can move up and down stably on the side of the column one 1 under the action of the rollers 27, so that the lead screw motor 25 can be lifted and lowered synchronously and stably with the lifting platform 3.

[0054] As preferred, a plurality of sealing pieces one 34 are arranged on the gap one 7, the plurality of sealing pieces one 34 are arranged side by side, a sealing piece two 35 is arranged below the sealing piece one 34, the sealing piece two 35 is consistent with the shape of the sealing piece one 34, the sealing piece one 34 and the sealing piece two 35 are arranged alternately, and the lower end of the sealing piece one 34 is in contact with the upper end of the sealing piece two 35. The sealing piece one 34 is arranged to be more than half the width of the stirrer 8, and the sealing piece one 34 and the sealing piece two 35 can completely cover the width of the gap one 7 by cooperating with each other, thereby preventing materials from spilling out of the gap one 7 during stirring.

[0055] As preferred, a limiting ring one 30 is arranged at the middle position inside the column one 1, a limiting ring two 32 is arranged below the limiting ring one 30, an air bag 33 is arranged between the limiting ring one 30 and the limiting ring two 32, an air pump 28 is arranged outside the stirring drum 4, an inflation pipe 29 is connected to the air pump 28, and the inflation pipe 29 is connected to the air bag 33. A discharging slope 31 is arranged above the limiting ring one 30, and the discharging slope 31 is inclined inward and downward.

[0056] The air pump 28 inflates the air bag 33, so that the air bag 33 protrudes from between the limiting ring one 30 and the limiting ring two 32 after expansion, thereby reducing the inner diameter of this part in the stirring drum 4 and affecting the passage of materials. The air bag 33 can divide the inside of the stirring drum 4 into two parts, so that the materials in the two parts are internally circulated, the flow between the upper part and the lower part is reduced, and a new stirring mode is generated. By superimposing the original stirring mode, a better material mixing effect is generated.

[0057] As preferred, the lower end of the cover plate 5 is provided with a sealing ring 6, and the inner periphery of the sealing ring 6 is in contact with the outer wall of the stirring drum 4.

[0058] The friction coefficient of the original PE pipe is between 0.01 and 0.013, and the friction coefficient of the PE water conveying composite pipe produced by the existing mixer is between 0.007 and 0.008, so that the friction coefficient is effectively reduced, and the surface friction of the pipe is reduced.

[0059] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-described embodiments. Any technical solution falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application are also considered to be within the protection scope of the present application.

Claims

1. A method for preparing a low-friction, high-flow-rate PE water-transporting composite pipe, characterized in that: Includes the following steps: Preparation of color-modified HDPE material: The color-modified HDPE material comprises the following components by weight: 90-100 parts HDPE resin, 2-2.5 parts carbon black, 1-2 parts glycerin, 1-3 parts processing dispersant, and 0.6-1.2 parts lubricant. The HDPE resin and glycerin are added to a mixer and mixed. After the glycerin is fully adhered to the surface of the HDPE resin, the carbon black, processing dispersant, and lubricant are added to the mixer and mixed. After the mixture is uniform, the material is fed into a twin-screw extruder for granulation to obtain the color-modified HDPE material. Preparation of COC-modified HDPE material: The COC-modified HDPE material comprises the following components by weight: 90-100 parts HDPE resin, 5-10 parts cyclic olefin copolymer, 3-5 parts processing dispersant, and 0.6-1.2 parts lubricant. The HDPE resin material and the cyclic olefin copolymer are added to a mixer for mixing. After the cyclic olefin copolymer is fully adhered to the surface of the HDPE resin, the processing dispersant and lubricant are added to the mixer for mixing. After the mixture is uniform, the material is fed into a twin-screw extruder for granulation to obtain the COC-modified HDPE material. Colored modified HDPE material and COC modified HDPE material are mixed in an 8:2 ratio and then melt-co-extruded through an extruder using a double-layer die to produce a composite pipe with an outer layer of colored HDPE and an inner layer of COC-HDPE modified material. The mixer includes a mixing drum (4), with a first column (1) and a second column (2) respectively on the left and right sides of the mixing drum (4). A lifting platform (3) is set between the upper parts of the first column (1) and the second column (2). A hydraulic cylinder (23) is set on the upper part of the first column (1). The lower end of the piston rod of the hydraulic cylinder (23) is connected to the lifting platform (3). A fixed frame (11) is set on the lower part of the lifting platform (3). A stirring motor (12) is installed on the lower part of the fixed frame (11). The stirring motor (12) drives the stirrer (8). The lower part of the lifting platform (3) A cover plate (5) is connected via a telescopic rod (55). A notch (7) is provided in the middle of the cover plate (5). The stirrer (8) is installed through the notch (7). The stirrer (8) includes a rotating shaft (38) that is driven and connected to a stirring motor (12). Several stirring blades (39) are provided on the outer periphery of the rotating shaft (38). An adjusting rod (41) is connected to the lower end of the rotating shaft (38) via a universal connector (40). An adjusting rod (42) is rotatably installed at the lower end of the adjusting rod (41). The lower end of the adjusting rod (42) is connected via a universal connector (40). The universal connector (40) is connected to the rotating shaft two (43). Several stirring blades two (45) are arranged on the outer periphery of the rotating shaft two (43). Stirring blade three (46) and stirring blade four (47) are respectively arranged on one side of the adjusting rod one (41) and the adjusting rod two (42). Stirring blade three (46) and stirring blade four (47) are located on the same side. The bottom of the stirring cylinder (4) is provided with a rotating seat that cooperates with the rotating shaft two (43). The front and rear sides of the adjusting rod one (41) are provided with connecting post one (48). The adjusting rod two (42) Connecting post 2 (49) is provided on both the front and rear sides. A spring (50) is connected between connecting post 1 (48) and connecting post 2 (49) on the same side. A limiting ring 1 (30) is provided in the middle position inside the stirring drum (4). A limiting ring 2 (32) is provided below the limiting ring 1 (30). An air bag (33) is provided between the limiting ring 1 (30) and the limiting ring 2 (32). An air pump (28) is provided on the outside of the stirring drum (4). An air pump (29) is connected to the air pump (28). The air pump (29) is connected to the air bag (33).

2. A low-friction, high-flow-rate PE water-transporting composite pipe prepared according to the preparation method of claim 1, characterized in that: The composite pipe has a double-layer structure, with an outer layer of colored HDPE and an inner layer of COC-HDPE modified material. The colored HDPE layer is made of colored modified HDPE material, which includes the following components by weight: 90-100 parts HDPE resin, 2-2.5 parts carbon black, 1-2 parts glycerol, 1-3 parts processing dispersant, and 0.6-1.2 parts lubricant. The COC-HDPE modified layer is made of COC-modified HDPE material, which comprises the following components by weight: 90-100 parts HDPE resin, 5-10 parts cyclic olefin copolymer, 3-5 parts processing dispersant, and 0.6-1.2 parts lubricant.

3. The low-friction, high-flow-rate PE water-transporting composite pipe according to claim 2, characterized in that: The ratio of color-modified HDPE material to COC-modified HDPE material is 8:

2. The color-modified HDPE material and COC-modified HDPE material are melt co-extruded through an extruder using a double-layer die.

4. The low-friction, high-flow-rate PE water-transporting composite pipe according to claim 2, characterized in that: The colored modified HDPE material comprises the following components by weight: 90 parts HDPE resin, 2 parts carbon black, 1 part glycerin, 1 part processing dispersant, and 0.6 parts lubricant.

5. The low-friction, high-flow-rate PE water-transporting composite pipe according to claim 2, characterized in that: The color-modified HDPE material comprises the following components by weight: 100 parts HDPE resin, 2.5 parts carbon black, 2 parts glycerol, 3 parts processing dispersant, and 1.2 parts lubricant.

6. The low-friction, high-flow-rate PE water-transporting composite pipe according to claim 2, characterized in that: COC-modified HDPE material comprises the following components by weight: 90 parts HDPE resin, 5 parts cyclic olefin copolymer, 3 parts processing dispersant, and 0.6 parts lubricant.

7. The low-friction, high-flow-rate PE water-transporting composite pipe according to claim 2, characterized in that: COC-modified HDPE material comprises the following components by weight: 100 parts HDPE resin, 10 parts cyclic olefin copolymer, 5 parts processing dispersant, and 1.2 parts lubricant.

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