Impact-resistant PE water supply pipe and preparation method thereof

Abstract

The invention discloses an impact-resistant PE water supply pipe and a preparation method thereof, and relates to the technical field of PE water supply pipes. Comprising an outer layer assembly, an inner layer assembly and a filling assembly fixed between the outer layer assembly and the inner layer assembly, the filling assembly comprises a composite layer, a plurality of supporting structures are arranged on the composite layer, the composite layer is obtained through a first method, and then the filling assembly is obtained. On the basis of the inner-layer PE pipe and the outer-layer PE pipe, the filling layer is designed inside, the outer surface of the inner-layer assembly is subjected to hot melting treatment, the outer wall of the inner-layer assembly is wrapped with the prepared filling assembly, and due to the fact that the outer wall of the inner-layer assembly is in the hot melting state, the filling assembly and the inner-layer assembly have good adhesiveness; the outer layer assembly in the plastic state is wrapped on the surface of the hardened filling assembly, thermalization treatment is carried out, the outer layer assembly is shrunk, the outer layer assembly, the inner layer assembly and the filling assembly form a whole, and the impact resistance effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of PE water supply pipes, in particular to an impact-resistant PE water supply pipe and a preparation method thereof. Background Art

[0002] PE water supply pipe is a kind of pipe commonly used in the construction industry. It is mainly used in water supply systems such as urban drinking water and rural tap water. Due to its excellent physical and chemical properties, PE pipe is widely used in water conservancy, agricultural irrigation, construction and other fields. The main characteristics of PE water supply pipe include corrosion resistance, good toughness, flexible connection method, light weight, small fluid resistance, etc. Impact-resistant PE pipe is a special pipe based on PE pipe, which improves its toughness and impact resistance through material modification or adding toughening agent. This type of pipe is usually used in environments that need to resist mechanical shock, vibration or other external forces.

[0003] Patent publication number CN113824079A discloses a super impact-resistant MPP pipe and a preparation method thereof. A buffer layer is added between the prepared outer tube and the inner tube. The buffer layer includes a sleeve, a first buffer component and a second buffer component. The sleeve, the first buffer component and the second buffer component form an annular covering on the inner tube, and the first buffer component and the second buffer component are intermittently arranged. When the pipe is impacted by an external force, multiple first buffer components and second buffer components can cooperate to disperse the external impact force, avoid a single buffer component being subjected to force alone, increase the upper limit of the force of the buffer component, thereby enhancing the impact resistance of the MPP pipe and extending its service life.

[0004] During the use of the above and similar technical solutions, in extreme weather conditions, such as when the temperature reaches -20°C, objects such as springs made of metal in the equipment will become brittle and there is a risk of breakage. Even if this temperature is not reached, the springs may be significantly reduced in toughness and ductility due to the influence of low temperature, thereby changing the elastic properties of the springs and failing to effectively achieve the impact resistance of the pipe. Summary of the invention

[0005] The object of the present invention is to provide an impact-resistant PE water supply pipe and a preparation method thereof to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: an impact-resistant PE water supply pipe and a preparation method thereof, comprising an outer layer component, an inner layer component and a filling component fixed between the outer layer component and the inner layer component, wherein the filling component comprises a composite layer, a plurality of supporting structures are arranged on the composite layer, and the composite layer is obtained by a first method, thereby obtaining the filling component;

[0007] The first method comprises:

[0008] S1: melting, heating the first target particles to a molten state to obtain a melt A;

[0009] S2: extrusion, extruding the melt A through a first target die to obtain a film B;

[0010] S3: Grooving, rolling the film B through the second target mold, setting multiple support structures on the film B, and obtaining a semi-finished product C;

[0011] S4: Glue injection, obtaining the position of the support structure to obtain a support position set, and based on the position information of the support position set, injecting colloid into the support structure to obtain a composite layer.

[0012] Furthermore, the first target particles are one or more of polyethylene particles or linear low-density polyethylene.

[0013] Furthermore, the first target die is a screw extruder, the temperature of the screw extruder is set to 180° C.-210° C., and the basic speed is set to 10 m / min-30 m / min.

[0014] Furthermore, the second target mold is a bubble forming roller, the outer wall of the bubble forming roller is provided with a plurality of groove structures, a vacuum pump is arranged inside the bubble forming roller, and the vacuum pump performs vacuum treatment on the film B passing through the bubble forming roller through the groove structure to obtain a composite layer.

[0015] A method for preparing an impact-resistant PE water supply pipe, using the above-mentioned method for preparing an impact-resistant PE water supply pipe, comprising:

[0016] M1: Preliminary preparation, preparing the outer layer component and the inner layer component by the first preparation method;

[0017] M2: Component processing, hot-melt treatment of the outer surface of the inner component;

[0018] M3: Material wrapping, wrapping the composite layer on the surface of the inner layer component to obtain a preliminary formed object C;

[0019] M4: Hardening treatment, spraying a hardener on the surface of the preliminary formed object A to harden its surface layer to obtain a hardened object D;

[0020] M5: Final wrapping: Wrap the outer component on the surface of the hardened material D to form a wrapping E, and heat the surface of the wrapping E to shrink the outer component.

[0021] Furthermore, the first preparation method comprises:

[0022] X1: melt extrusion, heating the second target particles to a molten state, and extruding them through an extruder to obtain extrudate 1 and extrudate 2 respectively;

[0023] X2: die molding, shaping the extrudate 2 through the third target die to obtain a molded object 2;

[0024] X3: temperature-differentiated cooling: respectively set the cooling temperatures of the extrudate 1 and the molded product 2, cool the extrudate 1 and the molded product 2, and obtain an outer layer component and an inner layer component.

[0025] Furthermore, the cooling temperature setting method of the extrudate 1 and the molded product 2 includes: target temperature setting, setting the first target temperature and the second target temperature respectively, the first target temperature is 100℃-120℃, the second target temperature is 20℃-25℃, so that the outer layer component is in a plastic state and the inner layer component is in a hardened state.

[0026] Furthermore, the hardener is polyurethane coating or epoxy resin or a mixture of the two.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The impact-resistant PE water supply pipe and the preparation method thereof are characterized in that a filling layer is designed inside the inner and outer layers of the PE pipe, and after the inner and outer layers are produced, different storage temperatures are set for the inner and outer layers respectively, so that the outer layer is in a plastic state and the inner layer is in a hardened state, then the outer surface of the inner layer is subjected to a hot-melt treatment, and the prepared filling component is wrapped on the outer wall of the inner layer, and since the outer wall of the inner layer is in a hot-melt state, the filling component and the inner layer have good adhesion, the outer layer is wrapped on the surface of the hardened filling component, and a thermal treatment is performed to shrink the outer layer, so that the outer layer, the inner layer and the filling form a whole, thereby improving the impact resistance.

[0029] At the same time, a hardener is sprayed on the outer wall of the bonding filling component to harden its surface, which further improves the filling component's ability to resist impact force. Since the filling component has multiple supporting structures inside when it is formed, the impact resistance of the filling component is further improved by injecting colloid inside the supporting structure. As the amount of glue injected in the supporting structure increases, the filling component formed has better impact resistance, thereby further improving the impact resistance of the filling component. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0031] Figure 2It is a schematic diagram of the composite layer structure of the present invention.

[0032] In the figure: 1, outer layer component; 2, inner layer component; 3, filling component; 301, composite layer. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Under the influence of external factors, the structure inside the pipe will be affected to a certain extent. The material inside the pipe will be affected by the environment and cause failure or reduced functionality. At this time, when the pipe faces impact, the pipe may be damaged due to the reduced functionality. The technical solution provided by the present application utilizes a three-in-one solution. On the basis of the inner and outer layers of PE pipes, a filling layer is designed inside. A plurality of supporting structures are arranged in the filling layer. After the inner and outer layer components are produced, different storage temperatures are set for the inner and outer layer components respectively, so that the outer layer component is in a plastic state and the inner layer component is in a hardened state. Then, the outer surface of the inner layer component is hot-melt treated, and the prepared filling component is wrapped around the outer wall of the inner layer component. Since the outer wall of the inner layer component is in a hot-melt state, the filling component and the inner layer component have good adhesion. In addition, a hardener is sprayed on the outer wall of the filling component after bonding to harden its surface, thereby further improving the filling component's ability to resist impact force. The outer layer component in a plastic state is wrapped around the surface of the hardened filling component and subjected to a heat treatment to shrink the outer layer component, thereby forming the outer layer component, the inner layer component and the filling component into a whole to improve its impact resistance. At the same time, since the filling component has multiple supporting structures inside when it is formed, the impact resistance of the filling component is further improved by injecting colloid inside the supporting structure. As the amount of glue injected in the supporting structure increases, the filling component formed has better impact resistance, and when the amount of glue injected reaches 80%, its impact resistance reaches the best, and when the amount of glue injected is 100%, its impact resistance decreases compared to 80% of the amount of glue injected, thereby further improving the impact resistance of the filling component.

[0035] Embodiment 1

[0036] A method for preparing an impact-resistant PE water supply pipe, using an impact-resistant PE water supply pipe, comprising an outer layer component 1, an inner layer component 2, and a filling component 3 fixed between the outer layer component 1 and the inner layer component 2, the filling component 3 comprising a composite layer 301, a plurality of supporting structures are arranged on the composite layer 301, and the supporting structure is a bubble structure. The process comprises the following steps:

[0037] S1: melting, heating one or more of polyethylene particles or linear low-density polyethylene to a molten state to obtain a melt A;

[0038] S2: Extrusion, rolling the melt A through a screw extruder, the temperature of the screw extruder is set to 180°C, and the basic speed is set to 10m / min to extrude the melt A to obtain a film B;

[0039] S3: groove pressing, through a bubble forming roller, the outer wall of the bubble forming roller is provided with a plurality of groove structures, a vacuum pump is arranged inside the bubble forming roller, the vacuum pump performs vacuum treatment on the film B passing through the bubble forming roller through the groove structure, and a plurality of support structures are arranged on the film B to obtain a semi-finished product C;

[0040] S4: Glue injection, obtaining the position of the support structure and obtaining a support position set. Based on the position information of the support position set, colloid is injected into the support structure respectively. The colloid is foaming glue and the injection volume is 20% to obtain a composite layer 301.

[0041] M1: Preliminary preparation, heating the second target particles to a molten state and extruding them through an extruder to obtain extrudate 1 and extrudate 2 respectively; die molding, shaping the extrudate 2 through a third target die to obtain a molded product 2; temperature-differential cooling, setting the cooling temperatures of the extrudate 1 and the molded product 2 respectively, setting the first target temperature and the second target temperature respectively, the first target temperature is 100°C, and the second target temperature is 20°C, so that the outer layer component 1 is in a plastic state and the inner layer component 2 is in a hardened state;

[0042] M2: Component processing, hot-melt treatment of the outer surface of the inner layer component 2;

[0043] M3: Material wrapping, wrapping the composite layer 301 on the surface of the inner layer component 2 to obtain a preliminary formed object C;

[0044] M4: Hardening treatment, spraying a hardener on the surface of the preliminary formed object A, the hardener being one or a mixture of polyurethane coating or epoxy resin, so as to harden the surface layer and obtain a hardened object D;

[0045] M5: Final wrapping: wrap the outer layer component 1 on the surface of the hardened material D to form a wrapping E, and heat the surface of the wrapping E to shrink the outer layer component 1.

[0046] Embodiment 2

[0047] A method for preparing an impact-resistant PE water supply pipe, using an impact-resistant PE water supply pipe, comprising an outer layer component 1, an inner layer component 2, and a filling component 3 fixed between the outer layer component 1 and the inner layer component 2, the filling component 3 comprising a composite layer 301, a plurality of supporting structures are arranged on the composite layer 301, and the supporting structure is a bubble structure. The process comprises the following steps:

[0048] S1: melting, heating one or more of polyethylene particles or linear low-density polyethylene to a molten state to obtain a melt A;

[0049] S2: Extrusion, rolling the melt A through a screw extruder, the temperature of the screw extruder is set to 180°C, and the basic speed is set to 10m / min to extrude the melt A to obtain a film B;

[0050] S3: groove pressing, through a bubble forming roller, the outer wall of the bubble forming roller is provided with a plurality of groove structures, a vacuum pump is arranged inside the bubble forming roller, the vacuum pump performs vacuum treatment on the film B passing through the bubble forming roller through the groove structure, and a plurality of support structures are arranged on the film B to obtain a semi-finished product C;

[0051] S4: Glue injection, obtaining the position of the support structure and obtaining a support position set. Based on the position information of the support position set, colloid is injected into the support structure respectively. The colloid is foaming glue and the injection volume is 40% to obtain a composite layer 301 .

[0052] M1: Preliminary preparation, heating the second target particles to a molten state and extruding them through an extruder to obtain extrudate 1 and extrudate 2 respectively; die molding, shaping the extrudate 2 through a third target die to obtain a molded product 2; temperature-differential cooling, setting the cooling temperatures of the extrudate 1 and the molded product 2 respectively, setting the first target temperature and the second target temperature respectively, the first target temperature is 100°C, and the second target temperature is 25°C, so that the outer layer component 1 is in a plastic state and the inner layer component 2 is in a hardened state;

[0053] M2: Component processing, hot-melt treatment of the outer surface of the inner layer component 2;

[0054] M3: Material wrapping, wrapping the composite layer 301 on the surface of the inner layer component 2 to obtain a preliminary formed object C;

[0055] M4: Hardening treatment, spraying a hardener on the surface of the preliminary formed object A, the hardener being one or a mixture of polyurethane coating or epoxy resin, so as to harden the surface layer and obtain a hardened object D;

[0056] M5: Final wrapping: wrap the outer layer component 1 on the surface of the hardened material D to form a wrapping E, and heat the surface of the wrapping E to shrink the outer layer component 1.

[0057] Embodiment 3

[0058] A method for preparing an impact-resistant PE water supply pipe, using an impact-resistant PE water supply pipe, comprising an outer layer component 1, an inner layer component 2, and a filling component 3 fixed between the outer layer component 1 and the inner layer component 2, the filling component 3 comprising a composite layer 301, a plurality of supporting structures are arranged on the composite layer 301, and the supporting structure is a bubble structure. The process comprises the following steps:

[0059] S1: melting, heating one or more of polyethylene particles or linear low-density polyethylene to a molten state to obtain a melt A;

[0060] S2: Extrusion, rolling the melt A through a screw extruder, the temperature of the screw extruder is set to 180°C, and the basic speed is set to 10m / min to extrude the melt A to obtain a film B;

[0061] S3: groove pressing, through a bubble forming roller, the outer wall of the bubble forming roller is provided with a plurality of groove structures, a vacuum pump is arranged inside the bubble forming roller, the vacuum pump performs vacuum treatment on the film B passing through the bubble forming roller through the groove structure, and a plurality of support structures are arranged on the film B to obtain a semi-finished product C;

[0062] S4: Glue injection, obtaining the position of the support structure and obtaining a support position set. Based on the position information of the support position set, colloid is injected into the support structure respectively. The colloid is foaming glue and the injection volume is 60% to obtain a composite layer 301.

[0063] M1: Preliminary preparation, heating the second target particles to a molten state and extruding them through an extruder to obtain extrudate 1 and extrudate 2 respectively; die molding, shaping the extrudate 2 through a third target die to obtain a molded product 2; temperature-differential cooling, setting the cooling temperatures of the extrudate 1 and the molded product 2 respectively, setting the first target temperature and the second target temperature respectively, the first target temperature is 100°C, and the second target temperature is 25°C, so that the outer layer component 1 is in a plastic state and the inner layer component 2 is in a hardened state;

[0064] M2: Component processing, hot-melt treatment of the outer surface of the inner layer component 2;

[0065] M3: Material wrapping, wrapping the composite layer 301 on the surface of the inner layer component 2 to obtain a preliminary formed object C;

[0066] M4: Hardening treatment, spraying a hardener on the surface of the preliminary formed object A, the hardener being one or a mixture of polyurethane coating or epoxy resin, so as to harden the surface layer and obtain a hardened object D;

[0067] M5: Final wrapping: wrap the outer layer component 1 on the surface of the hardened material D to form a wrapping E, and heat the surface of the wrapping E to shrink the outer layer component 1.

[0068] Embodiment 4

[0069] A method for preparing an impact-resistant PE water supply pipe, using an impact-resistant PE water supply pipe, comprising an outer layer component 1, an inner layer component 2, and a filling component 3 fixed between the outer layer component 1 and the inner layer component 2, the filling component 3 comprising a composite layer 301, a plurality of supporting structures are arranged on the composite layer 301, and the supporting structure is a bubble structure. The process comprises the following steps:

[0070] S1: melting, heating one or more of polyethylene particles or linear low-density polyethylene to a molten state to obtain a melt A;

[0071] S2: Extrusion, rolling the melt A through a screw extruder, the temperature of the screw extruder is set to 180°C, and the basic speed is set to 10m / min to extrude the melt A to obtain a film B;

[0072] S3: groove pressing, through a bubble forming roller, the outer wall of the bubble forming roller is provided with a plurality of groove structures, a vacuum pump is arranged inside the bubble forming roller, the vacuum pump performs vacuum treatment on the film B passing through the bubble forming roller through the groove structure, and a plurality of support structures are arranged on the film B to obtain a semi-finished product C;

[0073] S4: Glue injection, obtaining the position of the support structure and obtaining a support position set. Based on the position information of the support position set, colloid is injected into the support structure respectively. The colloid is foaming glue and the injection volume is 80% to obtain a composite layer 301.

[0074] M1: Preliminary preparation, heating the second target particles to a molten state and extruding them through an extruder to obtain extrudate 1 and extrudate 2 respectively; die molding, shaping the extrudate 2 through a third target die to obtain a molded product 2; temperature-differential cooling, setting the cooling temperatures of the extrudate 1 and the molded product 2 respectively, setting the first target temperature and the second target temperature respectively, the first target temperature is 100°C, and the second target temperature is 25°C, so that the outer layer component 1 is in a plastic state and the inner layer component 2 is in a hardened state;

[0075] M2: Component processing, hot-melt treatment of the outer surface of the inner layer component 2;

[0076] M3: Material wrapping, wrapping the composite layer 301 on the surface of the inner layer component 2 to obtain a preliminary formed object C;

[0077] M4: Hardening treatment, spraying a hardener on the surface of the preliminary formed object A, the hardener being one or a mixture of polyurethane coating or epoxy resin, so as to harden the surface layer and obtain a hardened object D;

[0078] M5: Final wrapping: wrap the outer layer component 1 on the surface of the hardened material D to form a wrapping E, and heat the surface of the wrapping E to shrink the outer layer component 1.

[0079] Embodiment 5

[0080] A method for preparing an impact-resistant PE water supply pipe, using an impact-resistant PE water supply pipe, comprising an outer layer component 1, an inner layer component 2, and a filling component 3 fixed between the outer layer component 1 and the inner layer component 2, the filling component 3 comprising a composite layer 301, a plurality of supporting structures are arranged on the composite layer 301, and the supporting structure is a bubble structure. The process comprises the following steps:

[0081] S1: melting, heating one or more of polyethylene particles or linear low-density polyethylene to a molten state to obtain a melt A;

[0082] S2: Extrusion, rolling the melt A through a screw extruder, the temperature of the screw extruder is set to 180°C, and the basic speed is set to 10m / min to extrude the melt A to obtain a film B;

[0083] S3: groove pressing, through a bubble forming roller, the outer wall of the bubble forming roller is provided with a plurality of groove structures, a vacuum pump is arranged inside the bubble forming roller, the vacuum pump performs vacuum treatment on the film B passing through the bubble forming roller through the groove structure, and a plurality of support structures are arranged on the film B to obtain a semi-finished product C;

[0084] S4: Glue injection, obtaining the position of the support structure and obtaining a support position set. Based on the position information of the support position set, colloid is injected into the support structure respectively. The colloid is foaming glue and the injection volume is 100%, thereby obtaining a composite layer 301 .

[0085] M1: Preliminary preparation, heating the second target particles to a molten state and extruding them through an extruder to obtain extrudate 1 and extrudate 2 respectively; die molding, shaping the extrudate 2 through a third target die to obtain a molded product 2; temperature-differential cooling, setting the cooling temperatures of the extrudate 1 and the molded product 2 respectively, setting the first target temperature and the second target temperature respectively, the first target temperature is 100°C, and the second target temperature is 25°C, so that the outer layer component 1 is in a plastic state and the inner layer component 2 is in a hardened state;

[0086] M2: Component processing, hot-melt treatment of the outer surface of the inner layer component 2;

[0087] M3: Material wrapping, wrapping the composite layer 301 on the surface of the inner layer component 2 to obtain a preliminary formed object C;

[0088] M4: Hardening treatment, spraying a hardener on the surface of the preliminary formed object A, the hardener being one or a mixture of polyurethane coating or epoxy resin, so as to harden the surface layer and obtain a hardened object D;

[0089] M5: Final wrapping: wrap the outer layer component 1 on the surface of the hardened material D to form a wrapping E, and heat the surface of the wrapping E to shrink the outer layer component 1.

[0090] Comparative Example

[0091] A PE tube having the same thickness as the outer layer component 1, the inner layer assembly, and the filling component 3 is used as a comparative example.

[0092] In order to verify the improvement of the impact resistance of the pipe obtained in this application compared with the traditional PE pipe, the impact resistance of the finished product obtained in the embodiment and the conventional PE pipe was tested. This test adopts a drop hammer impact test, the drop hammer mass is 5kg, the drop hammer height is 1000mm, and the samples involved in the test in Examples 1 to 5 and the comparative example are placed at -10℃ for 2h and then taken out. The impact test is carried out at a temperature of 25 (±1)℃, and the deformation data is observed.

[0093] In the sampling stage before the test begins, the finished products obtained in Examples 1 to 5 are sampled, and three synthetic PE pipes are obtained respectively. The samples are numbered respectively. The finished products obtained in Example 1 are recorded as 101, 102, and 103; the finished products obtained in Example 2 are recorded as 201, 202, and 203; the finished products obtained in Example 3 are recorded as 301, 302, and 303; the finished products obtained in Example 4 are recorded as 401, 402, and 403; the finished products obtained in Example 5 are recorded as 501, 502, and 503, and the conventional PE pipes obtained in the comparative example are recorded as 601, 602, and 603. The test results are shown in Table 1. Due to equipment and operation errors, there are slight differences in the impact resistance results of the same material, which is within the normal range. During the test, it is necessary to strictly abide by the use specifications of the equipment to reduce the error. The specific test steps will vary depending on the equipment, so they are not described in detail.

[0094] Table 1

[0095] Sample name Test temperature / ℃ Drop weight / kg Drop weight height / mm Deformation / mm 101 25.05 5 1000 2 102 25.03 5 1000 2 103 25.09 5 1000 1 201 25.07 5 1000 2 202 25.10 5 1002 2 203 25.08 5 1001 2 301 25.09 5 1000 1 302 25.06 5 999 1 303 25.05 5 1000 1 401 25.04 5 1004 1 402 25.10 5 1002 1 403 25.10 5 1001 0 501 24.09 5 1000 0 502 24.07 5 1000 0 503 25.10 5 1000 0 601 24.08 5 1000 6 602 25.07 5 1000 5 603 25.06 5 1000 5 As can be seen from Table 1, after the finished products obtained in Examples 1 to 5 and the comparative example were frozen at a temperature of -10°C for 2h, a drop hammer test was carried out at a height of 1000 (±5) mm, a weight of 5 kg, and a test temperature of 25 (±1)°C. The deformation of the finished products in Examples 1 to 5 was smaller, and the deformation of the conventional PE pipe in the comparative example was larger. The experiment shows that the technical solution provided in the present application has a certain improvement in impact resistance.

[0096] The finished products obtained in Examples 1 to 5 were sampled in the same manner and tested again with the comparative example. This test adopted a drop hammer impact test with a drop hammer mass of 10 kg and a drop hammer height of 1000 mm. The PE pipes tested in Examples 1 to 5 and the comparative example were placed at -20°C for 2 hours and then taken out. The impact test was carried out at a temperature of 25 (±1)°C to observe the deformation data.

[0097] The test results are shown in Table 2. Due to equipment and operation errors, there are slight differences in the impact resistance results of the same material, which is within the normal range. During the test, it is necessary to strictly abide by the equipment's usage specifications to reduce the error. The specific test steps will vary depending on the equipment, so they are not described in detail.

[0098] Table 2

[0099] Sample name Test temperature / ℃ Drop weight / kg Drop weight height / mm Deformation / mm 101 25.08 10 1000 3 102 25.06 10 1000 2 103 25.06 10 1000 3 201 25.08 10 1000 2 202 25.05 10 1002 2 203 25.03 10 1001 3 301 25.08 10 1000 2 302 25.02 10 999 1 303 25.02 10 1000 2 401 25.05 10 1004 1 402 25.05 10 1002 1 403 25.06 10 1001 1 501 24.09 10 1000 4 502 24.07 10 1000 3 503 25.10 10 1000 4 601 24.03 10 1000 25 602 25.03 10 1000 30 603 25.08 10 1000 29 It can be seen from Table 2 that after the finished products obtained in Examples 1 to 5 and the comparative example were frozen at a temperature of -10°C for 2h, a drop hammer test was carried out at a height of 1000 (±5) mm, a weight of 5 kg, and a test temperature of 25 (±1)°C. The deformation of the finished products in Examples 1 to 5 was smaller, and the deformation of the conventional PE pipe in the comparative example was larger. The experiment shows that the technical solution provided in the present application has a certain improvement in impact resistance.

[0100] As the amount of glue injected into the support structure increases, the resulting filling component has better impact resistance, and when the injection amount reaches 80%, its impact resistance reaches the best. When the injection amount is 100%, its impact resistance decreases compared to the 80% injection amount.

[0101] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. An impact-resistant PE water supply pipe, comprising an outer layer component (1), an inner layer component (2), and a filling component (3) fixed between the outer layer component (1) and the inner layer component (2), characterized in that: The filling component (3) comprises a composite layer (301), a plurality of supporting structures being arranged on the composite layer (301), and the composite layer (301) is obtained by a first method, thereby obtaining the filling component (3).

2. A method for preparing an impact-resistant PE water supply pipe, characterized in that: Using the impact-resistant PE water supply pipe material according to claim 1, the first method comprises: S1: melting, heating the first target particles to a molten state to obtain a melt A; S2: extrusion, extruding the melt A through a first target die to obtain a film B; S3: Grooving, rolling the film B through the second target mold, setting multiple support structures on the film B, and obtaining a semi-finished product C; S4: injecting glue, obtaining the position of the support structure, obtaining a support position set, and injecting glue into the support structure based on the position information of the support position set, with the injection volume being 20%-80%, to obtain a composite layer (301).

3. The method for preparing an impact-resistant PE water supply pipe according to claim 2, characterized in that: The first target particles are one or more of polyethylene particles or linear low-density polyethylene, the first target mold is a screw extruder, the temperature of the screw extruder is set to 180° C.-210° C., and the basic speed is set to 10 m / min-30 m / min.

4. The method for preparing an impact-resistant PE water supply pipe according to claim 2, characterized in that: The second target mold is a bubble forming roller, the outer wall of which is provided with a plurality of groove structures, a vacuum pump is arranged inside the bubble forming roller, and the vacuum pump performs vacuum treatment on the film B passing through the bubble forming roller through the groove structure to obtain a semi-finished product C.

5. The method for preparing an impact-resistant PE water supply pipe according to claim 2, characterized in that: The method for assembling the outer layer component (1), the inner layer component (2) and the filling component (3) comprises: M1: preliminary preparation, preparing an outer layer component (1) and an inner layer component (2) by a first preparation method; M2: Component processing, hot-melt treatment of the outer surface of the inner component (2); M3: Material wrapping, wrapping the composite layer (301) on the surface of the inner layer component (2) to obtain a preliminary formed object C; M4: Hardening treatment, spraying a hardener on the surface of the preliminary formed object A to harden its surface layer to obtain a hardened object D; M5: Final wrapping, wrapping the outer layer component (1) on the surface of the hardened material D to form a wrapping E, and performing a heat treatment on the surface of the wrapping E to shrink the outer layer component (1).

6. The method for preparing an impact-resistant PE water supply pipe according to claim 5, characterized in that: The first preparation method comprises: X1: melt extrusion, heating the second target particles to a molten state, and extruding them through an extruder to obtain extrudate 1 and extrudate 2 respectively; X2: die molding, shaping the extrudate 2 through the third target die to obtain a molded object 2; X3: temperature-differentiated cooling: the cooling temperatures of the extrudate 1 and the molded product 2 are set respectively, and the extrudate 1 and the molded product 2 are cooled to obtain an outer layer component (1) and an inner layer component (2).

7. The method for preparing an impact-resistant PE water supply pipe according to claim 5, characterized in that: The cooling temperature setting method of the extrudate 1 and the molded product 2 comprises: target temperature setting, respectively setting a first target temperature and a second target temperature, the first target temperature being 100°C-120°C, and the second target temperature being 20°C-25°C, so that the outer layer component (1) is in a plastic state and the inner layer component (2) is in a hardened state.

8. The method for preparing an impact-resistant PE water supply pipe according to claim 5, characterized in that: The hardener is polyurethane coating or epoxy resin or a mixture of the two.

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