Composite material of regenerated HDPE (high-density polyethylene) pipe modified drainage corrugated pipe and preparation method of composite material

Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to a composite material of a regenerated HDPE pipe modified drainage corrugated pipe and a preparation method of the composite material. The composite material comprises the following raw materials: a regenerated pipe or a broken pipe material, a self-made reinforcing and toughening functional master batch, a recycled waste polyolefin regenerated material, adhesive resin, an elastomer, a recycled waste high-pressure polyethylene regenerated material and a defoaming agent. According to the composite material, waste regenerated pipes or pipe broken materials are used as raw materials, the problem of waste of water pipe production resources is solved, resource utilization is achieved, environmental pollution is reduced, cost is reduced, meanwhile, the corrugated pipe prepared from the composite material as the raw material has high toughness, rigidity and environmental stress cracking resistance, and the service life of the corrugated pipe is prolonged. The service life is long, and the comprehensive performance is excellent.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a composite material of a recycled HDPE pipe modified drainage corrugated pipe and a preparation method thereof. Background Art

[0002] In the process of producing HDPE (high-density polyethylene) pipes in large and medium-sized pipe companies, a large number of discarded HDPE pipes with different properties will be generated. HDPE pipe recycling and reuse is divided into recycled materials composed of pure plastic pipe HDPE materials, wire-wound composite pipe materials, heat-resistant polyethylene materials, corrugated pipe materials, etc. In the preparation of drainage pipes, the recycled material of the pipe is one of the most ideal materials. If this part of the material is used for the preparation of sewer pipes, it will greatly enhance the treatment of hazardous waste and realize its resource utilization. However, the ring stiffness of the pipes directly produced from HDPE pipe recycled materials alone is mostly 6kN / m 2 It is far from the level of SN8 series pipes.

[0003] Among the many ring stiffness grades listed in the national standard, SN8 (ring stiffness ≮8kN / m 2 ) series of pipes are the most widely used. In the pipeline structure design under general geological conditions and landfill depth, it is generally believed that SN8 series pipes can meet the requirements of the pipeline system. Only through extrusion molding of pipe recycled materials modified raw materials can the mechanical properties of the pipes meet the standards. However, the cost of purchasing new materials will increase significantly. At the same time, the recycled materials will not be fully used, which will cause certain waste and do not meet the needs of process economy, making it difficult for enterprises to bear.

[0004] How to achieve the recycling of these waste pipe recycled materials and enhance the mechanical properties and physical and chemical properties of the recycled materials has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] Based on the above technical background, the main purpose of the present invention is to provide a composite material of a recycled HDPE pipe modified drainage corrugated pipe and a preparation method thereof to overcome the shortcomings of the prior art.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention includes:

[0007] The first aspect of the present invention is to provide a composite material of a recycled HDPE pipe modified drainage corrugated pipe, the composite material comprising the following raw materials in parts by weight:

[0008] 1-6 parts by weight of recycled pipes or pipe crushed materials, 4-7 parts by weight of self-made reinforcing and toughening functional masterbatch, 5-8 parts by weight of recycled waste polyolefin recycled materials, 1-2 parts by weight of adhesive resin, 2-4 parts by weight of elastomer, 5-8 parts by weight of recycled waste high-pressure polyethylene recycled materials, and 0.1-1 part by weight of defoaming agent.

[0009] Preferably, the composite material comprises the following raw materials in parts by weight:

[0010] 2 parts by weight of recycled pipes or pipe crushed materials, 5 parts by weight of homemade reinforcing and toughening functional masterbatch, 6 parts by weight of recycled waste polyolefin materials, 1.5 parts by weight of adhesive resin, 3 parts by weight of elastomer, 6 parts by weight of recycled waste high-pressure polyethylene recycled materials, and 0.5 parts by weight of defoaming agent.

[0011] Preferably, the recycled pipe or pipe crushed material is selected from one or more of HDPE pure plastic pipe recycled material, HDPE steel wire wrapped composite pipe recycled material, heat-resistant polyethylene HDPE pipe recycled material, HDPE corrugated pipe recycled material or crushed material, and pipe-grade polyethylene recycled waste.

[0012] Preferably, the recycled waste polyolefin materials are recycled waste olefin polymer materials.

[0013] Preferably, the elastomer is one or more of POE, ethylene propylene diene monomer rubber (EPDM), nitrile rubber (NBR) or butyl rubber (IIR), preferably POE.

[0014] The defoaming agent is calcium oxide.

[0015] Preferably, the self-made reinforcing and toughening functional masterbatch is made from the following raw materials in parts by weight: 5 to 15 parts of recycled waste high-pressure polyethylene, 0.5 to 2 parts of coupling agent, 60 to 80 parts of cinnamon powder, 3 to 5 parts of dispersant, and 4 to 6 parts of elastomer.

[0016] More preferably, the elastomer is POE;

[0017] The dispersant is paraffin;

[0018] The coupling agent is an aluminate coupling agent or a silane coupling agent.

[0019] The second aspect of the present invention is to provide a method for preparing the composite material of the recycled HDPE pipe modified drainage corrugated pipe according to the first aspect of the present invention, the preparation method comprising the following steps:

[0020] Step 1, mixing the weighed raw materials to obtain a mixture;

[0021] Step 2: melt-plasticize and granulate the mixture to obtain a composite material of a recycled HDPE pipe-modified drainage corrugated pipe.

[0022] Preferably, in step 1, the homemade reinforcing and toughening functional masterbatch is prepared by the following steps:

[0023] Step a, adding a coupling agent to the cinnamon ink powder and stirring and mixing, adding a dispersant after heating and continuing to stir and mix, and after cooling, obtaining a surface-active cinnamon ink powder;

[0024] Step b, adding recycled waste high-pressure polyethylene regeneration material to the surface-active Guimo powder, stirring and mixing, and then melt-extruded to obtain a self-made reinforcing and toughening functional masterbatch.

[0025] Preferably, in step a, a coupling agent is added to the cinnamon toner powder, and the mixture is stirred and mixed at 70 to 100° C. and a stirring speed of 1500 to 2500 r / min for 6 to 15 minutes, and then the temperature is raised to 100 to 120° C., and a dispersant is added and stirred for 2 to 5 minutes;

[0026] Preferably, in step b, recycled waste high-pressure polyethylene regeneration material is added to the surface-active Guimo powder, stirred and mixed, and then melt-extruded at 180-220°C.

[0027] The beneficial effects of the present invention are:

[0028] (1) The present invention uses waste recycled pipes or pipe crushing materials as raw materials to provide a composite material for recycled HDPE pipe-modified drainage corrugated pipes. The recycled pipes or pipe crushing materials used are all sourced from unqualified pipes from enterprises, which not only solves the problem of waste of resources in water pipe production, but also realizes resource utilization, reduces environmental pollution, and can significantly reduce costs. At the same time, the waste recycled pipes or pipe crushing materials used in the present invention have excellent performance and high environmental stress cracking resistance. The corrugated pipe made from the composite material of the present invention as raw material has high toughness, rigidity and environmental stress cracking resistance. The ring stiffness of the pipe can reach SN8, and the oxidation induction time is greater than the standard requirement of 20 minutes, which has the performance of long-term use.

[0029] (2) The preparation method of the composite material of the present invention is simple, the preparation cost is low, and the obtained corrugated pipe has good comprehensive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A photograph of a DN400 recycled polyethylene corrugated pipe made from the composite material of Example 1 is shown. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below, and the characteristics and advantages of the present invention will become clearer and more distinct with the description.

[0032] The first aspect of the present invention is to provide a composite material of a recycled HDPE pipe modified drainage corrugated pipe, the composite material comprising the following raw materials in parts by weight:

[0033] 1-6 parts by weight of recycled pipes or pipe crushed materials, 4-7 parts by weight of self-made reinforcing and toughening functional masterbatch, 5-8 parts by weight of recycled waste polyolefin recycled materials, 1-2 parts by weight of adhesive resin, 2-4 parts by weight of elastomer, 5-8 parts by weight of recycled waste high-pressure polyethylene recycled materials, and 0.1-1 part by weight of defoaming agent.

[0034] Preferably, the composite material comprises the following raw materials in parts by weight:

[0035] 2 parts by weight of recycled pipes or pipe crushed materials, 5 parts by weight of homemade reinforcing and toughening functional masterbatch, 6 parts by weight of recycled waste polyolefin materials, 1.5 parts by weight of adhesive resin, 3 parts by weight of elastomer, 6 parts by weight of recycled waste high-pressure polyethylene recycled materials, and 0.5 parts by weight of defoaming agent.

[0036] The recycled pipe or pipe crushed material is selected from one or more of HDPE pure plastic pipe recycled material, HDPE wire wound composite pipe recycled material, heat-resistant polyethylene HDPE pipe recycled material, HDPE corrugated pipe recycled material or crushed material, and pipe-grade polyethylene recycled waste.

[0037] The pipe-grade polyethylene recycling waste mainly refers to a type of crushed material (wherein the length of the crushed material particles is less than 4mm) or crushed material re-granulation from the crushed PE100 and PE80 pipes. They all come from unqualified pipes of the enterprise, have excellent performance, and have high resistance to environmental stress cracking.

[0038] The melting index of the HDPE pure plastic pipe recycled material or PE100, PE80 pipe crushed material at 190° C. and a load of 5 kg is 0.29 g / 10 min; wherein the crushed material pellet length is less than 4 mm.

[0039] The HDPE steel wire wound composite pipe recycled material has a melting index of 0.4-0.6 g / 10 min at 190° C. and a load of 5 kg; the HDPE steel wire wound composite pipe recycled material contains 15.5% of adhesive resin.

[0040] The melt index of the heat-resistant polyethylene material HDPE pipe recycled material is 1.8 g / 10 min at 190° C. and a load of 5 kg.

[0041] The melting index of the recycled or crushed material of the HDPE corrugated pipe is 1.0 g / 10 min at 190° C. and a load of 5 kg, the recycled material contains 20% calcium carbonate, and the length of the crushed material particles is less than 4 mm.

[0042] The recycled waste polyolefin regenerated materials are waste recycled regenerated materials of olefin polymers, such as waste recycled regenerated materials of polypropylene, polyethylene, etc., which can greatly reduce costs.

[0043] The melt index of the recycled waste polyolefin material is 0.8-2.0 g / 10 min at 190° C. and a load of 5 kg.

[0044] The recycled waste high-pressure polyethylene regenerated material is preferably a type of film-type recycled granulated material with LLDPE (linear low-density polyethylene) as the main body.

[0045] The melt index of the recycled waste high-pressure polyethylene regenerated material is 1.8-3.0 g / 10 min at 190° C. and a load of 2.16 kg.

[0046] The elastomer is preferably POE (polyethylene octene co-elastomer, metallocene polyolefin elastomer ethylene), the octene monomer content is greater than 20%, and the melt flow rate is 1.0 g / 10 min.

[0047] The defoaming agent is preferably calcium oxide, which can effectively eliminate moisture and gas in the recycled plastic and improve the stability and elongation of the composition.

[0048] The melting index of the adhesive resin at 190° C. and a load of 2.16 kg is 3.05 g / 10 min.

[0049] The self-made reinforcing and toughening functional masterbatch is prepared from the following raw materials in parts by weight: 5 to 15 parts of recycled waste high-pressure polyethylene regenerated materials, 0.5 to 2 parts of coupling agent, 60 to 80 parts of cinnamon powder, 3 to 5 parts of dispersant, and 4 to 6 parts of elastomer.

[0050] Preferably, the self-made reinforcing and toughening functional masterbatch is made from the following raw materials in parts by weight: 10 parts of recycled waste high-pressure polyethylene regenerated materials, 1 part of coupling agent, 70 parts of cinnamon powder, 4 parts of dispersant, and 5 parts of elastomer.

[0051] The elastomer is one or more of POE, ethylene propylene diene monomer rubber (EPDM), nitrile rubber (NBR) or butyl rubber (IIR), preferably POE.

[0052] The dispersant is preferably paraffin wax, which has the function of a lubricant. The melting point of paraffin wax is in the range of 59 to 64° C., and the latent heat of fusion is 152.6 kJ / kg.

[0053] The coupling agent is an aluminate coupling agent or a silane coupling agent, preferably an aluminate coupling agent.

[0054] The guimo powder is obtained by grinding guimo stone (black shale), and the guimo powder is a flaky structure, with a SiO2 mass fraction of not less than 55%, a free carbon mass fraction of not less than 12%, a particle size of ≥800 mesh, and a particle size distribution range of ≤mesh mean ±20%. It can be used as a reinforcing filler for plastics, especially black guimo stone, which can reduce the amount of black masterbatch used and reduce costs.

[0055] When the added amount of recycled pipes or pipe crushed materials, waste high-pressure polyethylene recycled materials, and POE elastomers is the above-mentioned weight parts, they can compensate for each other's respective defects and synergistically exert their respective advantages to form a high-rigidity and high-toughness material, which can improve the environmental stress cracking resistance of the corrugated pipe and enable the buried double-wall polyethylene structural wall pipeline to have better comprehensive performance.

[0056] The second aspect of the present invention is to provide a method for preparing the composite material of the recycled HDPE pipe modified drainage corrugated pipe according to the first aspect of the present invention, the preparation method comprising the following steps:

[0057] Step 1, mixing the weighed raw materials to obtain a mixture;

[0058] Step 2: melt-plasticize and granulate the mixture to obtain a composite material of a recycled HDPE pipe-modified drainage corrugated pipe.

[0059] The above steps are described in detail below.

[0060] In step 1, the self-made strengthening and toughening functional masterbatch is prepared by the following steps:

[0061] Step a, adding a coupling agent to the cinnamon ink powder and stirring and mixing, adding a dispersant after heating and continuing to stir and mix, and after cooling, obtaining a surface-active cinnamon ink powder;

[0062] Step b, adding recycled waste high-pressure polyethylene regeneration material to the surface-active Guimo powder, stirring and mixing, and then melting and extruding to obtain a self-made reinforcing and toughening functional masterbatch.

[0063] In step a, a coupling agent is added to the cinnamon powder, and the mixture is stirred and mixed at 70 to 100° C. and a stirring speed of 1500 to 2500 r / min for 6 to 15 minutes, and then the temperature is raised to 100 to 120° C., and a dispersant is added and stirred for 2 to 5 minutes. Preliminary mixing is performed to ensure that the components are evenly distributed. Excessive heating may cause volatilization or decomposition of the additive, while too low a temperature may affect the activation effect. Too short a stirring time may result in insufficient activation, while too long a stirring time may cause energy waste and overheating of the material.

[0064] Preferably, a coupling agent is added to the cinnamon toner, and the mixture is stirred and mixed at 100° C. and a stirring speed of 1500 r / min for 10 min, and then the temperature is raised to 110° C., a dispersant is added, and stirring is continued for 3 min.

[0065] In step b, recycled waste high-pressure polyethylene regeneration material is added to the surface-active Guimo powder, stirred and mixed, and then melt extruded at 180-220° C. Preferably, melt extruded at 200° C.

[0066] When preparing toughening and reinforcing masterbatch, compounding some recycled waste polyolefins with high melt index and recycled waste high-pressure polyethylene LLDPE into HDPE pipes can not only reduce costs but also increase the MFR (melt index) of the material, making the melt flow rate of the material 1.1-1.4g / 10min, meeting the requirements of extrusion-grade HDPE double-wall corrugated pipes and reducing production costs.

[0067] In step 2, the temperature of the melt plasticization is 180-220°C, preferably, the temperature of the melt plasticization is 200°C.

[0068] Example

[0069] The present invention is further described below by means of specific examples. These embodiments are only intended to illustrate the present invention but are not intended to limit the scope of the present invention.

[0070] Example 1

[0071] The composite material of the drainage corrugated pipe modified with pure plastic pipe recycled materials includes the following raw materials in parts by weight: 2 parts of PE100 and PE80 pipe crushed materials or HDPE pure plastic pipe recycled materials, 5 parts of self-made reinforcing and toughening functional masterbatch (Gui Mo powder as filler), 6 parts of recycled waste polyolefin recycled materials, 1.5 parts of adhesive resin, 3 parts of POE as elastomer, 6 parts of recycled waste high-pressure polyethylene recycled materials, and 0.5 parts of defoaming agent.

[0072] Among them, the self-made reinforcing and toughening functional masterbatch is made of the following raw materials in parts by weight: 10 parts of recycled waste high-pressure polyethylene recycled materials, 1 part of aluminate coupling agent, 70 parts of cinnamon powder, 4 parts of paraffin as a dispersant lubricant, and 5 parts of POE as an elastomer.

[0073] The melt index of HDPE pure plastic pipe recycled material or PE100, PE80 pipe crushed material is 0.29g / 10min at 190℃ and 5kg load; the length of crushed material particles is less than 4mm.

[0074] The melt index of recycled waste high-pressure polyethylene is 2.0g / 10min at 190℃ and a load of 2.16kg.

[0075] The melt index of recycled waste polyolefin materials at 190°C and a load of 5kg is 1.0g / 10min.

[0076] The POE as an elastomer is a metallocene polyolefin elastomer ethylene, the octene monomer content is greater than 20%, and the melt index is 1.0 g / 10 min at 190° C. and a load of 2.15 kg.

[0077] The melt index of the adhesive resin at 190°C and a load of 2.16 kg is 3.05 g / 10 min.

[0078] The defoaming agent is calcium oxide, which is commercially available as an industrial product.

[0079] Example 2

[0080] The composite material of the drainage corrugated pipe modified with recycled steel wire wound composite pipe material includes the following raw materials in parts by weight: 2 parts of recycled HDPE steel wire wound composite pipe material, 5 parts of self-made reinforcing and toughening functional masterbatch (Gui Mo powder as filler), 6 parts of recycled waste polyolefin recycled material, 2 parts of POE as elastomer, 2 parts of recycled waste high-pressure polyethylene recycled material, and 0.5 parts of defoaming agent.

[0081] Among them, the self-made reinforcing and toughening functional masterbatch is made of the following raw materials in parts by weight: 10 parts of recycled waste high-pressure polyethylene recycled materials, 1 part of aluminate coupling agent, 70 parts of cinnamon powder, 4 parts of paraffin as a dispersant lubricant, and 5 parts of POE as an elastomer.

[0082] The melt index of the recycled HDPE steel wire wound composite pipe material is 0.4-0.6 g / 10 min at 190° C. and a load of 5 kg. The recycled HDPE steel wire wound composite pipe material contains 15.5% of adhesive resin.

[0083] The POE as an elastomer is a metallocene polyolefin elastomer ethylene, the octene monomer content is greater than 20%, and the melt index is 1.0 g / 10 min at 190° C. and a load of 2.15 kg.

[0084] The melt index of recycled waste high-pressure polyethylene is 2.0g / 10min at 190℃ and a load of 2.16kg.

[0085] The melt index of recycled waste polyolefin materials at 190°C and a load of 5kg is 1.0g / 10min.

[0086] The defoaming agent is calcium oxide, which is commercially available as an industrial product.

[0087] Example 3

[0088] The composite material of the heat-resistant polyethylene modified drainage corrugated pipe includes the following raw materials in parts by weight: 2 parts of heat-resistant polyethylene HDPE pipe recycled materials, 5.5 parts of self-made reinforcing and toughening functional masterbatch (Gui Mo powder as filler), 7 parts of recycled waste polyolefin recycled materials, 2 parts of POE as elastomer, 1 part of recycled waste high-pressure polyethylene recycled materials, 0.5 parts of defoaming agent, and 1.5 parts of adhesive resin.

[0089] Among them, the self-made reinforcing and toughening functional masterbatch is made of the following raw materials in parts by weight: 10 parts of recycled waste high-pressure polyethylene recycled materials, 1 part of aluminate coupling agent, 70 parts of cinnamon powder, 4 parts of paraffin as a dispersant lubricant, and 5 parts of POE as an elastomer.

[0090] The melt index of heat-resistant polyethylene material HDPE pipe recycled material is 1.8g / 10min at 190℃ and a load of 5kg.

[0091] The POE as an elastomer is a metallocene polyolefin elastomer ethylene, the octene monomer content is greater than 20%, and the melt index is 1.0 g / 10 min at 190° C. and a load of 2.15 kg.

[0092] The melt index of recycled waste high-pressure polyethylene is 2.0g / 10min at 190℃ and a load of 2.16kg.

[0093] The melt index of recycled waste polyolefin materials at 190°C and a load of 5kg is 1.0g / 10min.

[0094] The defoaming agent is calcium oxide, which is commercially available as an industrial product.

[0095] The melt index of the adhesive resin at 190°C and a load of 2.16 kg is 3.05 g / 10 min.

[0096] Example 4

[0097] The composite material of the modified drainage corrugated pipe made of recycled or crushed materials of corrugated pipe includes the following raw materials by weight: 2 parts of recycled or crushed materials of HDPE pure plastic pipe, 5.0 parts of self-made reinforcing and toughening functional masterbatch (Guimo powder as filler), 6 parts of recycled waste polyolefin recycled materials, 2 parts of POE as elastomer, 2 parts of recycled waste high-pressure polyethylene recycled materials, 0.5 parts of defoaming agent, 1.5 parts of adhesive resin, and 4 parts of recycled or crushed materials of HDPE corrugated pipe.

[0098] Among them, the self-made reinforcing and toughening functional masterbatch is made of the following raw materials in parts by weight: 10 parts of recycled waste high-pressure polyethylene recycled materials, 1 part of aluminate coupling agent, 70 parts of cinnamon powder, 4 parts of paraffin as a dispersant lubricant, and 5 parts of POE as an elastomer.

[0099] The melt index of HDPE pure plastic pipe recycled material or crushed material is 0.29g / 10min at 190℃ and 5kg load; the length of crushed material particles is less than 4mm.

[0100] The melt index of the recycled or crushed material of HDPE corrugated pipe is 1.0g / 10min at 190℃ and a load of 5kg. The recycled material contains 20% calcium carbonate, and the length of the crushed material particles is less than 4mm.

[0101] The melt index of the adhesive resin at 190°C and a load of 2.16 kg is 3.05 g / 10 min.

[0102] The POE as an elastomer is a metallocene polyolefin elastomer ethylene, the octene monomer content is greater than 20%, and the melt index is 1.0 g / 10 min at 190° C. and a load of 2.15 kg.

[0103] The melt index of recycled waste high-pressure polyethylene is 2.0.g / 10min at 190℃ and a load of 2.16kg.

[0104] The melt index of recycled waste polyolefin materials at 190°C and a load of 5kg is 1.0g / 10min.

[0105] The defoaming agent is calcium oxide, which is commercially available as an industrial product.

[0106] Example 5

[0107] According to the homemade reinforcing and toughening functional masterbatch of Example 1, weigh the raw materials, put the Guimo powder into a high-speed mixer for dehumidification and mixing, stir at a speed of 1500 rpm for 10 minutes at room temperature, raise the temperature to 90-100°C, add aluminate coupling agent, stir for 3 minutes, wait until the temperature reaches 110°C, add paraffin and stir for 3 minutes, mix and cool the materials to obtain surface-active Guimo powder.

[0108] Add the surface-active Guimo powder, recycled waste high-pressure polyethylene materials and POE elastomer into a mixer and mix them evenly before discharging the mixed materials; after the granulator is preheated, the mixed raw materials are fed into the granulator by a feeder for heating and melting at 200°C, and then extruded by a screw and cut into granules by a hot cutter to obtain a reinforcing and toughening functional masterbatch.

[0109] The melt index of recycled waste high-pressure polyethylene is 2.0.g / 10min at 190℃ and a load of 2.16kg.

[0110] The coupling agent is an aluminate coupling agent, which is commercially available.

[0111] Lubricant, paraffin wax has a melting point range of 59-64°C, a latent heat of fusion of 152.6 kJ / kg, and is commercially available.

[0112] A method for preparing a composite material:

[0113] Weigh each raw material according to the composite material described in Example 1, add the weighed raw materials into a blender, stir, and mix evenly to form a mixture.

[0114] The mixture is directly added into an extruder for melt plasticization and granulation at 200° C. to obtain a composite material of a recycled HDPE pipe modified drainage corrugated pipe.

[0115] Example 6

[0116] The composite material was prepared in a manner similar to that of Example 5, with the only difference being that the raw materials were weighed according to the homemade reinforcing and toughening functional masterbatch of Example 2, and the raw materials were weighed according to the composite material described in Example 2.

[0117] Example 7

[0118] The composite material was prepared in a manner similar to that of Example 5, with the only difference being that the raw materials were weighed according to the homemade reinforcing and toughening functional masterbatch of Example 3, and the raw materials were weighed according to the composite material described in Example 3.

[0119] Example 8

[0120] The composite material was prepared in a manner similar to that of Example 5, with the only difference being that the raw materials were weighed according to the homemade reinforcing and toughening functional masterbatch of Example 4, and the raw materials were weighed according to the composite material described in Example 4.

[0121] Experimental example

[0122] Experimental Example 1 Physical Properties Test

[0123] The composite materials of Examples 1 to 4 were respectively used to prepare modified DN400 recycled polyethylene corrugated pipes. The DN400 recycled polyethylene corrugated pipes prepared from the composite material of Example 1 were as follows: Figure 1 As shown in the figure, the bellows are tested. The ring flexibility test standard is ISO 13968:2008 (the pipe must remain free of cracks, disengagement and reverse bending of the inner wall after the test), and the ring stiffness test standard is GB / T 9647-2015 (according to the SN grade (such as SN4, SN6.3 to SN16), the ring stiffness must reach or exceed 4 to 16 kN / m 2 ), the test standard for oxidation induction time is GB / T 19466.6-2009 (under 200°C, oxidation induction time should be no less than 20 minutes). The test results are shown in Table 1.

[0124] Table 1 Performance test results

[0125]

[0126]

[0127] As can be seen from Table 1, the corrugated pipe made of the composite material of the present invention has good physical properties, and the ring stiffness of the pipe reaches SN8. The drainage pipe requires higher rigidity to meet the external pressure requirements, and its ring flexibility can still meet the requirements of the product standard. The oxidation induction time is greater than the standard requirement of 20min. It shows that the products modified by the composite material of the present invention have the performance of long-term use. Among them, the pipe waste used in Example 3 is heat-resistant polyethylene material, which belongs to LLDPE material. Its notched impact strength and elongation at break are extremely high. Adding it to the material can well improve the corresponding toughness of the composite material. The pipe produced by this formula is suitable for use in low temperature areas.

[0128] The present invention has been described in detail above in conjunction with specific implementations and exemplary examples, but these descriptions cannot be understood as limiting the present invention. Those skilled in the art understand that, without departing from the spirit and scope of the present invention, a variety of equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its implementation methods, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

Claims

1. A composite material for recycled HDPE pipe modified drainage corrugated pipe, characterized in that: The composite material comprises the following raw materials in parts by weight: 1-6 parts by weight of recycled pipes or pipe crushed materials, 4-7 parts by weight of self-made reinforcing and toughening functional masterbatch, 5-8 parts by weight of recycled waste polyolefin recycled materials, 1-2 parts by weight of adhesive resin, 2-4 parts by weight of elastomer, 5-8 parts by weight of recycled waste high-pressure polyethylene recycled materials, and 0.1-1 part by weight of defoaming agent.

2. The composite material of the recycled HDPE pipe modified drainage corrugated pipe according to claim 1, characterized in that: The composite material comprises the following raw materials in parts by weight: 2 parts by weight of recycled pipes or pipe crushed materials, 5 parts by weight of homemade reinforcing and toughening functional masterbatch, 6 parts by weight of recycled waste polyolefin materials, 1.5 parts by weight of adhesive resin, 3 parts by weight of elastomer, 6 parts by weight of recycled waste high-pressure polyethylene recycled materials, and 0.5 parts by weight of defoaming agent.

3. The composite material of recycled HDPE pipe modified drainage corrugated pipe according to claim 1, characterized in that: The recycled pipe or pipe crushed material is selected from one or more of HDPE pure plastic pipe recycled material, HDPE wire wound composite pipe recycled material, heat-resistant polyethylene HDPE pipe recycled material, HDPE corrugated pipe recycled material or crushed material, and pipe-grade polyethylene recycled waste.

4. The composite material of recycled HDPE pipe modified drainage corrugated pipe according to claim 1, characterized in that: The recycled waste polyolefin regenerated material is waste recycled regenerated material of olefin polymers.

5. The composite material of recycled HDPE pipe modified drainage corrugated pipe according to claim 1, characterized in that: The elastomer is POE; and / or, The defoaming agent is calcium oxide.

6. The composite material of recycled HDPE pipe modified drainage corrugated pipe according to claim 1, characterized in that: The self-made reinforcing and toughening functional masterbatch is prepared from the following raw materials in parts by weight: 5 to 15 parts of recycled waste high-pressure polyethylene regenerated materials, 0.5 to 2 parts of coupling agent, 60 to 80 parts of cinnamon powder, 3 to 5 parts of dispersant, and 4 to 6 parts of elastomer.

7. The composite material of recycled HDPE pipe modified drainage corrugated pipe according to claim 6, characterized in that: The elastomer is one or more of POE, EPDM rubber, nitrile rubber or butyl rubber; The dispersant is paraffin; The coupling agent is an aluminate coupling agent or a silane coupling agent.

8. A method for preparing a composite material of a recycled HDPE pipe modified drainage corrugated pipe according to any one of claims 1 to 7, characterized in that: The preparation method comprises the following steps: Step 1, mixing the weighed raw materials to obtain a mixture; Step 2: melt-plasticize and granulate the mixture to obtain a composite material of a recycled HDPE pipe-modified drainage corrugated pipe.

9. The preparation method according to claim 8, characterized in that: In step 1, the homemade reinforcing and toughening functional masterbatch is prepared by the following steps: Step a, adding a coupling agent to the cinnamon ink powder and stirring and mixing, adding a dispersant after heating and continuing to stir and mix, and after cooling, obtaining a surface-active cinnamon ink powder; Step b, adding recycled waste high-pressure polyethylene regeneration material to the surface-active Guimo powder, stirring and mixing, and then melt-extruded to obtain a self-made reinforcing and toughening functional masterbatch.

10. The preparation method according to claim 9, characterized in that: In step a, a coupling agent is added to the cinnamon toner powder, and the mixture is stirred and mixed at 70 to 100° C. and a stirring speed of 1500 to 2500 r / min for 6 to 15 minutes, and then the temperature is raised to 100 to 120° C., a dispersant is added, and stirring is continued for 2 to 5 minutes; In step b, recycled waste high-pressure polyethylene regeneration material is added to the surface-active Guimo powder, stirred and mixed, and then melt-extruded at 180-220°C.

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