A method and application of preparing cable sheath material from recycled plastic

Abstract

The present invention belongs to the technical field of wires and cables, and specifically relates to a method and application of preparing cable sheathing materials from plastic recycled materials. The method provided by the present invention comprises the following steps: first, mixing a lubricant, an antioxidant and a surfactant to obtain a premix; then, mixing the plastic recycled material, a tackifying resin, a compatibilizer and the premix, plasticizing, and granulating to obtain a cable sheathing material, wherein the surfactant comprises dodecyl ammonium chloride, PVP K30 and coconut oil diethanolamide. The method provided by the present invention comprises a method of preparing a cable sheathing material from plastic recycled materials, which improves the physical properties of the cable sheathing material by utilizing the synergistic effect of dodecyl ammonium chloride, PVP K30 and coconut oil diethanolamide. The present invention utilizes plastic recycled materials to prepare cable sheathing materials, realizes resource recycling, has a simple process, is easy to operate, is suitable for industrial production, and has a high value for promotion and application.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric wires and cables, and in particular relates to a method for preparing cable sheathing material from recycled plastics and an application thereof. Background Art

[0002] The insulating materials used in wires and cables, commonly known as cable materials, primarily include plastics, rubber, nylon, and other components. Plastics offer excellent insulation, mechanical and physical properties, and thermochemical stability. They are also relatively simple to process, offer high production efficiency, and are abundant in resources. Therefore, they are the optimal choice for both insulation and sheathing applications in wire and cable production. Commonly used plastics for cables include polyvinyl chloride (PVC), polyethylene (PE), cross-linked polyethylene (XLPE), and polypropylene (PP). However, cable materials are susceptible to macromolecular chain breakage and harmful changes in their chemical structure under the influence of factors such as wind, rain, sunlight (ultraviolet rays), heat, and ozone. This can lead to premature aging, brittleness, and cracking, deteriorating their physical and mechanical properties and even losing their insulating and protective properties.

[0003] Chinese invention patent publication number CN117487287A discloses an anti-aging photovoltaic cable material and a preparation method thereof, which comprises, by weight, 100 parts of PVC resin, 12-18 parts of ethylene-octene copolymer, 5-7 parts of plasticizer, 0.25-0.35 parts of modified anti-aging agent, 4-5 parts of heat stabilizer, 10-15 parts of flame retardant, 0.3-0.4 parts of coupling agent and 2-3 parts of lubricant; the modified anti-aging agent is prepared by esterification reaction of 2,2',4,4'-tetrahydroxybenzophenone and methacryloyl chloride to prepare monomer 1, by ring-opening reaction of glycidyl methacrylate and tetramethylpiperidinamine, and then by substitution of n-octyl chloride and the secondary amine structure in the structure to prepare monomer 2, and then the two are randomly added with 1,3-propanedithiol to form an oligomer, which has excellent long-term stable anti-aging properties.

[0004] Another Chinese invention patent publication number CN116478488A discloses an anti-aging photovoltaic cable and its preparation method, which includes, by weight: 100 parts of PVC resin, 10-20 parts of linear low-density polyethylene, 10-20 parts of ethylene-octene copolymer, 2-5 parts of masterbatch, 5.5-9 parts of composite anti-aging agent, 3-4 parts of calcium zinc stabilizer, 4-7 parts of calcium carbonate, 2-3 parts of stearic acid, 5-8 parts of epoxy soybean oil and 1.2-1.6 parts of flame retardant; the composite anti-aging agent uses a porous material composite carrier containing zinc titanium oxide and a silane coupling agent as a bridging material to graft compound b containing an ortho-hydroxybenzophenone structure onto the surface of the composite carrier, exerting the dual functions of ultraviolet shielding and conversion in the PVC matrix, while fixing compound b to achieve long-term anti-ultraviolet aging effect.

[0005] Another Chinese invention patent publication number CN109161120A discloses an anti-aging material, a preparation method and its application in the preparation of cable protection tubes, comprising the following raw materials in parts by weight: 60-70 parts of PVC resin, 55-70 parts of PP resin, 30-35 parts of PE resin, 5-10 parts of an anti-aging agent, 4-6 parts of a compatibilizer, 3-5 parts of a coupling agent and 3-6 parts of an impact resister; the anti-aging agent is a mixture of an antioxidant, a light stabilizer, an ultraviolet absorber and a light shielding agent in the weight ratio of 4-6:3-7:3-5:2-4, which has excellent anti-aging properties, and good flame retardancy, impact resistance and mechanical properties.

[0006] However, the preparation method of the above invention patent has many ingredients and complicated process, and the prepared cable material is still not ideal in terms of shielding performance, anti-aging performance and mechanical properties.

[0007] Therefore, there is an urgent need in this field to establish a cable sheath material that uses recycled plastics to prepare better shielding performance, anti-aging performance and mechanical properties. Summary of the Invention

[0008] In view of the problems existing in the prior art, the present invention provides a method for preparing cable sheath material from recycled plastics and its application.

[0009] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0010] A method for preparing cable sheath material from recycled plastic material comprises the following steps:

[0011] (1) First, mix the lubricant, antioxidant and surfactant to obtain a premix;

[0012] (2) The plastic recycling material, tackifying resin, compatibilizer and premix are mixed and granulated to obtain the cable sheath material.

[0013] Wherein, the surfactant in step (1) includes lauryl ammonium chloride, PVP K30 and coconut oil diethanolamide.

[0014] Preferably, the surfactant comprises a mixture of lauryl ammonium chloride, PVP K30 and coconut oil diethanolamide in a mass ratio of 3-6:1-3:2-4.

[0015] More preferably, the surfactant comprises a mixture of lauryl ammonium chloride, PVP K30 and coconut oil diethanolamide in a mass ratio of 3-5:1.5-2.5:2-3.

[0016] Further preferably, the surfactant comprises a mixture of lauryl ammonium chloride, PVP K30 and coconut oil diethanolamide in a mass ratio of 2:1:1.

[0017] Preferably, the surfactant needs to be soluble in ethanol, and the mass volume ratio of the surfactant to ethanol is 1 g:2-3 mL.

[0018] More preferably, the mass volume ratio of the surfactant to ethanol is 1 g:2 mL.

[0019] Preferably, the mixing requires ultrasound, the ultrasound temperature is 50-70° C., the ultrasound time is 0.5-1.5 h, and the ultrasound power is 100-200 W.

[0020] More preferably, the ultrasonic temperature is 60° C., the ultrasonic time is 1 h, and the ultrasonic power is 200W.

[0021] Preferably, the lubricant in step (1) is selected from one or more of Clariant wax powder PE520, Honeywell 6A wax, butyl stearate, zinc stearate, calcium stearate and magnesium stearate.

[0022] More preferably, the lubricant is selected from one or more of Honeywell 6A wax, zinc stearate and magnesium stearate.

[0023] Further preferably, the lubricant is Honeywell 6A wax or zinc stearate.

[0024] Preferably, the antioxidant in step (1) is selected from one or more of antioxidant 1010, antioxidant 168 and antioxidant DLTP.

[0025] More preferably, the antioxidant is antioxidant 1010, antioxidant 168 or antioxidant DLTP.

[0026] Preferably, the plastic recycled material in step (2) includes one or more of flower bud recycled material, drip irrigation tape recycled material and bottle cap recycled material.

[0027] Preferably, the tackifying resin in step (2) comprises chloroacetic acid resin and RX-80 resin in a mass ratio of 1:1-3.

[0028] More preferably, the tackifying resin comprises chloroacetic acid resin and RX-80 resin in a mass ratio of 1:2.

[0029] Preferably, the compatibilizer in step (2) is selected from one or both of maleic anhydride grafted SEBS and maleic anhydride grafted PE.

[0030] Preferably, the mixing in step (2) requires stirring, the stirring speed is 200-500 rpm, the stirring temperature is 90-110° C., and the stirring time is 1-2 h.

[0031] More preferably, the stirring speed is 300-400 rpm, the stirring temperature is 100-110° C., and the stirring time is 1.5-2 h.

[0032] More preferably, the stirring speed is 300 rpm, the stirring temperature is 100° C., and the stirring time is 2 h.

[0033] Preferably, the granulation process includes three heating stages, the first stage heating temperature is 140-150°C, the second stage heating temperature is 160-170°C, and the third stage heating temperature is 170-180°C.

[0034] More preferably, the first stage heating temperature is 145°C, the second stage heating temperature is 165°C, and the third stage heating temperature is 175°C.

[0035] Preferably, the mass ratio of the lubricant, antioxidant, surfactant, plastic recycled material, tackifying resin and compatibilizer is 1-3:0.5-1.5:3-6:70-90:2-5:3-10.

[0036] More preferably, the mass ratio of the lubricant, antioxidant, surfactant, plastic recycled material, tackifying resin and compatibilizer is 2-2.5:1-1.5:4-5:80-90:3-4:5-8.

[0037] Further preferably, the mass ratio of the lubricant, antioxidant, surfactant, plastic recycling material, tackifying resin and compatibilizer is 2:1:5:90:3:6.

[0038] The present invention also provides a cable sheath material prepared by the method.

[0039] The present invention also provides application of the method in preparing cable wire materials.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] (1) The present invention provides a method for preparing a cable sheath material using recycled plastic materials, and improves the physical properties of the cable sheath material by utilizing the synergistic effect of lauryl ammonium chloride, PVP K30 and coconut oil diethanolamide.

[0042] (2) The present invention selects a combination of chloroacetic acid resin and RX-80 resin as a tackifying resin. Compared with using a single resin, the prepared cable sheath material has excellent shielding performance, anti-aging performance and mechanical properties.

[0043] (3) The present invention utilizes recycled plastic materials to prepare cable sheath materials, thereby realizing the recycling of waste resources. The process is simple, the operation is convenient, and the invention is suitable for industrial production, and has a high value for promotion and application. DETAILED DESCRIPTION

[0044] It is worth noting that the raw materials used in the present invention are all common commercially available products, among which maleic anhydride grafted SEBS and maleic anhydride grafted PE are both purchased from Dongguan Shenghao Plastic Raw Materials Co., Ltd.; chloroacetic acid resin, model CP-710, is purchased from Shanghai Kaiyin Chemical Co., Ltd.; RX-80 resin is purchased from Huaxiang Chemical Trading Co., Ltd.

[0045] Example 1

[0046] A method for preparing cable sheath material from recycled plastics, comprising the following steps:

[0047] (1) First, 5 kg of surfactant was weighed and dissolved in 10 L of anhydrous ethanol. The surfactant was a mixture of lauryl ammonium chloride, PVP K30, and coconut oil diethanolamide in a mass ratio of 2:1:1. 2 kg of zinc stearate, 1 kg of antioxidant 1010, and 5 kg of surfactant were placed in an ultrasonic machine and ultrasonicated at 60°C and 200 W for 1 h to obtain a premix, which was set aside.

[0048] (2) Add 30 kg of recycled flower buds, 20 kg of recycled drip irrigation tape, 40 kg of recycled bottle caps, 3 kg of tackifying resin (the tackifying resin is a mixture of chloroacetic acid resin and RX-80 resin in a mass ratio of 1:2) and 6 kg of maleic anhydride grafted SEBS to the premix, and stir at 100 ° C and 300 rpm for 2 h. After stirring, granulate the mixture in a twin-screw extruder at a speed of 100 rpm. The extruder is heated in three stages: the first stage is heated at 145 ° C, the second stage is heated at 165 ° C, and the third stage is heated at 175 ° C. The mixture is extruded and granulated to obtain the cable sheath material.

[0049] Example 2

[0050] A method for preparing cable sheath material from recycled plastics, comprising the following steps:

[0051] (1) First, 4 kg of surfactant was weighed and dissolved in 10 L of anhydrous ethanol. The surfactant was a mixture of lauryl ammonium chloride, PVP K30, and coconut oil diethanolamide in a mass ratio of 5:1.5:3. 2.5 kg of Honeywell 6A wax, 1 kg of antioxidant 168, and 4 kg of surfactant were placed in an ultrasonic machine and ultrasonicated at 60°C and 200 W for 1 h to obtain a premix, which was set aside.

[0052] (2) Add 40 kg of recycled flower buds, 15 kg of recycled drip irrigation tape, 25 kg of recycled bottle caps, 4 kg of tackifying resin (the tackifying resin is a mixture of chloroacetic acid resin and RX-80 resin in a mass ratio of 1:1) and 7 kg of maleic anhydride grafted SEBS to the premix, and stir at 100 ° C and 300 rpm for 2 h. After stirring, granulate the mixture in a twin-screw extruder at a speed of 100 rpm. The extruder is heated in three stages: the first stage is heated at 150 ° C, the second stage is heated at 160 ° C, and the third stage is heated at 170 ° C. The mixture is extruded and granulated to obtain the cable sheath material.

[0053] Example 3

[0054] A method for preparing cable sheath material from recycled plastics, comprising the following steps:

[0055] (1) First, 3 kg of surfactant was weighed and dissolved in 6 L of anhydrous ethanol. The surfactant was a mixture of lauryl ammonium chloride, PVP K30, and coconut oil diethanolamide in a mass ratio of 3:1:2. 1 kg of magnesium stearate, 0.5 kg of antioxidant DLTP, and 3 kg of surfactant were placed in an ultrasonic machine and ultrasonicated at 50°C and 100 W for 1.5 h to obtain a premix, which was set aside.

[0056] (2) Add 30 kg of recycled flower buds, 20 kg of recycled drip irrigation tape, 20 kg of recycled bottle caps, 2 kg of tackifying resin (the tackifying resin is a mixture of chloroacetic acid resin and RX-80 resin with a mass ratio of 1:3) and 3 kg of maleic anhydride grafted PE to the premix, and stir at 90 ° C and 200 rpm for 2 h. After stirring, granulate the mixture in a twin-screw extruder at a speed of 100 rpm. The extruder is heated in three stages: the first stage heating temperature is 150 ° C, the second stage heating temperature is 170 ° C, and the third stage heating temperature is 180 ° C. Extrusion granulation is performed to obtain the cable sheath material.

[0057] Example 4

[0058] A method for preparing cable sheath material from recycled plastics, comprising the following steps:

[0059] (1) 6 kg of surfactant was weighed and dissolved in 12 L of anhydrous ethanol. The surfactant was a mixture of lauryl ammonium chloride, PVP K30, and coconut oil diethanolamide in a mass ratio of 3:1:2. 3 kg of magnesium stearate, 1.5 kg of antioxidant DLTP, and 6 kg of surfactant were placed in an ultrasonic machine and ultrasonicated at 70°C and 200 W for 1.5 h to obtain a premix, which was then set aside.

[0060] (2) Add 50 kg of recycled flower buds, 20 kg of recycled drip irrigation tape, 20 kg of recycled bottle caps, 5 kg of tackifying resin (the tackifying resin is a mixture of chloroacetic acid resin and RX-80 resin with a mass ratio of 1:2) and 10 kg of maleic anhydride grafted PE to the premix, and stir at 110 ° C and 500 rpm for 1 hour. After stirring, granulate the mixture in a twin-screw extruder at a speed of 100 rpm. The extruder is heated in three stages: the first stage heating temperature is 110 ° C, the second stage heating temperature is 160 ° C, and the third stage heating temperature is 180 ° C. Extrusion granulation is performed to obtain the cable sheath material.

[0061] Comparative Example 1

[0062] The same as Example 1, except that the surfactant is a mixture of PVP K30 and coconut oil diethanolamide in a mass ratio of 1:2.

[0063] A method for preparing cable sheath material from recycled plastics, comprising the following steps:

[0064] (1) First, 5 kg of surfactant was weighed and dissolved in 10 L of anhydrous ethanol. The surfactant was a mixture of PVP K30 and coconut oil diethanolamide in a mass ratio of 1:2. 2 kg of zinc stearate, 1 kg of antioxidant 1010, and 5 kg of surfactant were placed in an ultrasonic machine and ultrasonicated at 60°C and 200 W for 1 h to obtain a premix, which was set aside.

[0065] (2) Add 30 kg of recycled flower buds, 20 kg of recycled drip irrigation tape, 40 kg of recycled bottle caps, 3 kg of tackifying resin (the tackifying resin is a mixture of chloroacetic acid resin and RX-80 resin in a mass ratio of 1:1) and 6 kg of maleic anhydride grafted SEBS to the premix, and stir at 100 ° C and 300 rpm for 2 hours. After stirring, granulate the mixture in a twin-screw extruder at a speed of 100 rpm. The twin-screw extruder is heated in three stages: the first stage heating temperature is 145 ° C, the second stage heating temperature is 165 ° C, and the third stage heating temperature is 175 ° C. Extrusion granulation is performed to obtain the cable sheath material.

[0066] Comparative Example 2

[0067] The same as Example 1, the only difference is that the surfactant is dodecyl ammonium chloride.

[0068] A method for preparing cable sheath material from recycled plastics, comprising the following steps:

[0069] (1) First, weigh 5 kg of surfactant (dodecyl ammonium chloride) and dissolve it in 10 L of anhydrous ethanol. Place 2 kg of zinc stearate, 1 kg of antioxidant 1010, and 5 kg of surfactant in an ultrasonic machine and ultrasonicate at 60°C and 200 W for 1 hour to obtain a premix, which is then set aside.

[0070] (2) Add 30 kg of recycled flower buds, 20 kg of recycled drip irrigation tape, 40 kg of recycled bottle caps, 3 kg of tackifying resin (the tackifying resin is a mixture of chloroacetic acid resin and RX-80 resin in a mass ratio of 1:1) and 6 kg of maleic anhydride grafted SEBS to the premix, and stir at 100 ° C and 300 rpm for 2 hours. After stirring, granulate the mixture in a twin-screw extruder at a speed of 100 rpm. The twin-screw extruder is heated in three stages: the first stage heating temperature is 145 ° C, the second stage heating temperature is 165 ° C, and the third stage heating temperature is 175 ° C. Extrusion granulation is performed to obtain the cable sheath material.

[0071] Comparative Example 3

[0072] The same as Example 1, except that the mixture of lauryl ammonium chloride and coconut oil diethanolamide is in a mass ratio of 2:1.

[0073] A method for preparing cable sheath material from recycled plastics, comprising the following steps:

[0074] (1) First, 5 kg of surfactant was weighed and dissolved in 10 L of anhydrous ethanol. The surfactant was a mixture of lauryl ammonium chloride and coconut oil diethanolamide in a mass ratio of 2:1. 2 kg of zinc stearate, 1 kg of antioxidant 1010, and 5 kg of surfactant were placed in an ultrasonic machine and ultrasonicated at 60°C and 200 W for 1 h to obtain a premix, which was set aside.

[0075] (2) Add 30 kg of recycled flower buds, 20 kg of recycled drip irrigation tape, 40 kg of recycled bottle caps, 3 kg of tackifying resin (the tackifying resin is a mixture of chloroacetic acid resin and RX-80 resin in a mass ratio of 1:1) and 6 kg of maleic anhydride grafted SEBS to the premix, and stir at 100 ° C and 300 rpm for 2 hours. After stirring, granulate the mixture in a twin-screw extruder at a speed of 100 rpm. The twin-screw extruder is heated in three stages: the first stage heating temperature is 145 ° C, the second stage heating temperature is 165 ° C, and the third stage heating temperature is 175 ° C. Extrusion granulation is performed to obtain the cable sheath material.

[0076] Comparative Example 4

[0077] The same as Example 1, except that the mixture of dodecyl ammonium chloride and PVP K30 is in a mass ratio of 2:1.

[0078] A method for preparing cable sheath material from recycled plastics, comprising the following steps:

[0079] (1) First, weigh 5 kg of surfactant and dissolve it in 10 L of anhydrous ethanol. The surfactant is a mixture of dodecyl ammonium chloride and PVP K30 in a mass ratio of 2:1. 2 kg of zinc stearate, 1 kg of antioxidant 1010, and 5 kg of surfactant are placed in an ultrasonic machine and ultrasonicated at 60°C and 200 W for 1 h to obtain a premix, which is set aside.

[0080] (2) Add 30 kg of recycled flower buds, 20 kg of recycled drip irrigation tape, 40 kg of recycled bottle caps, 3 kg of tackifying resin (the tackifying resin is a mixture of chloroacetic acid resin and RX-80 resin in a mass ratio of 1:1) and 6 kg of maleic anhydride grafted SEBS to the premix, and stir at 100 ° C and 300 rpm for 2 hours. After stirring, granulate the mixture in a twin-screw extruder at a speed of 100 rpm. The twin-screw extruder is heated in three stages: the first stage heating temperature is 145 ° C, the second stage heating temperature is 165 ° C, and the third stage heating temperature is 175 ° C. Extrusion granulation is performed to obtain the cable sheath material.

[0081] Comparative Example 5

[0082] The same as Example 1, the only difference is that the tackifying resin is chloroacetic acid resin.

[0083] A method for preparing cable sheath material from recycled plastics, comprising the following steps:

[0084] (1) First, 5 kg of surfactant was weighed and dissolved in 10 L of anhydrous ethanol. The surfactant was a mixture of lauryl ammonium chloride, PVP K30, and coconut oil diethanolamide in a mass ratio of 2:1:1. 2 kg of zinc stearate, 1 kg of antioxidant 1010, and 5 kg of surfactant were placed in an ultrasonic machine and ultrasonicated at 60°C and 200 W for 1 h to obtain a premix, which was set aside.

[0085] (2) Add 30 kg of recycled flower buds, 20 kg of recycled drip irrigation tape, 40 kg of recycled bottle caps, 3 kg of chloroacetic acid resin, and 6 kg of maleic anhydride grafted SEBS to the premix, and stir at 100°C and 300 rpm for 2 h. After stirring, pelletize the mixture in a twin-screw extruder at a speed of 100 rpm. The extruder is heated in three stages: the first stage is heated at 145°C, the second stage is heated at 165°C, and the third stage is heated at 175°C. Extrusion and pelletization are then performed to obtain the cable sheath material.

[0086] Comparative Example 6

[0087] The same as Example 1, the only difference is that the tackifying resin is RX-80 resin.

[0088] A method for preparing cable sheath material from recycled plastics, comprising the following steps:

[0089] (1) First, 5 kg of surfactant was weighed and dissolved in 10 L of anhydrous ethanol. The surfactant was a mixture of lauryl ammonium chloride, PVP K30, and coconut oil diethanolamide in a mass ratio of 2:1:1. 2 kg of zinc stearate, 1 kg of antioxidant 1010, and 5 kg of surfactant were placed in an ultrasonic machine and ultrasonicated at 60°C and 200 W for 1 h to obtain a premix, which was set aside.

[0090] (2) Add 30 kg of recycled flower buds, 20 kg of recycled drip irrigation tape, 40 kg of recycled bottle caps, 3 kg of RX-80 resin, and 6 kg of maleic anhydride-grafted SEBS to the premix, and stir at 100°C and 300 rpm for 2 h. After stirring, pelletize the mixture in a twin-screw extruder at a speed of 100 rpm. The extruder is heated in three stages: the first stage is heated at 145°C, the second stage is heated at 165°C, and the third stage is heated at 175°C. Extrusion and pelletization are then performed to obtain the cable sheath material.

[0091] Comparative Example 7

[0092] The same as Example 1, the only difference is that step (1) does not involve ultrasound.

[0093] A method for preparing cable sheath material from recycled plastics, comprising the following steps:

[0094] (1) First, 5 kg of surfactant was weighed and dissolved in 10 L of anhydrous ethanol. The surfactant was a mixture of lauryl ammonium chloride, PVP K30, and coconut oil diethanolamide in a mass ratio of 2:1:1. 2 kg of zinc stearate, 1 kg of antioxidant 1010, and 5 kg of surfactant were placed in a blender and stirred at 60°C and 300 rpm for 1 h to obtain a premix, which was set aside.

[0095] (2) Add 30 kg of recycled flower buds, 20 kg of recycled drip irrigation tape, 40 kg of recycled bottle caps, 3 kg of tackifying resin (the tackifying resin is a mixture of chloroacetic acid resin and RX-80 resin in a mass ratio of 1:2) and 6 kg of maleic anhydride grafted SEBS to the premix, and stir at 100 ° C and 300 rpm for 2 h. After stirring, granulate the mixture in a twin-screw extruder at a speed of 100 rpm. The extruder is heated in three stages: the first stage is heated at 145 ° C, the second stage is heated at 165 ° C, and the third stage is heated at 175 ° C. The mixture is extruded and granulated to obtain the cable sheath material.

[0096] Test Case

[0097] The cable sheath materials prepared in Examples 1-4 and Comparative Examples 1-7 were respectively tested for melt mass flow rate (i.e., melt index), density, tensile strength, low-temperature elongation at break (-18°C, 1h) and air oven thermal aging (i.e., tensile strain at break, 100°C, 240h) with reference to GB / T 15065-2009 "Black polyethylene plastic for wires and cables"; and the electromagnetic shielding effectiveness low-frequency band (9kHz-20MHz) test was carried out with reference to GB / T12190-2021 "Measurement method for shielding effectiveness of electromagnetic shielding rooms", with 10 samples in each group, and the arithmetic mean of the test results was taken. The results are shown in Table 1.

[0098] Table 1 Performance test results of cable sheath materials prepared in Examples 1-4 and Comparative Examples 1-7

[0099]

[0100]

[0101] As can be seen from Table 1, the cable sheath materials prepared in Examples 1-4 are superior to the cable sheath materials prepared in Comparative Examples 1-7 in terms of melt index, density, tensile strength, low-temperature elongation at break, tensile strain at break and electromagnetic shielding effectiveness, indicating that the cable sheath materials prepared in the present invention have excellent shielding performance, anti-aging performance and mechanical properties.

[0102] Example 1 and Comparative Examples 1-4 demonstrate that by selecting dodecyl ammonium chloride, PVP K30, and coconut oil diethanolamide as surfactants and utilizing their synergistic effect, the shielding performance, aging resistance, and mechanical properties of the cable sheath material are significantly improved. Comparative Examples 5-6 demonstrate that the use of a single resin results in varying degrees of degradation in the physical properties of the prepared cable sheath material. Example 1 and Comparative Example 7 demonstrate that the use of ultrasound during the premix preparation allows for sufficient bonding of the raw materials, thereby comprehensively improving the physical properties of the cable sheath material.

[0103] In summary, the present invention utilizes recycled plastic materials to prepare cable sheath materials, thereby realizing the recycling of waste resources. The process is simple, the operation is convenient, and the cable sheath material is suitable for industrial production, thus having high promotion and application value.

[0104] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A method for preparing cable sheathing material from recycled plastics, characterized in that: The steps include: (1) First, mix the lubricant, antioxidant and surfactant to obtain a premix; (2) The plastic recycling material, tackifying resin, compatibilizer and premix are mixed and granulated to obtain the cable sheath material. In step (1), the surfactant includes a mixture of lauryl ammonium chloride, PVP K30 and coconut oil diethanolamide in a mass ratio of 3-6:1-3:2-4; the mixing requires ultrasound, the ultrasound temperature is 50-70°C, the ultrasound time is 0.5-1.5h, and the ultrasound power is 100-200W; in step (2), the tackifying resin includes a chloroacetic acid resin and an RX-80 resin in a mass ratio of 1:1-3.

2. The method according to claim 1, characterized in that The lubricant in step (1) is selected from one or more of Clariant wax powder PE520, Honeywell 6A wax, butyl stearate, zinc stearate, calcium stearate and magnesium stearate, and the antioxidant is selected from one or more of antioxidant 1010, antioxidant 168 and antioxidant DLTP.

3. The method according to claim 1, characterized in that The surfactant in step (1) needs to be dissolved in ethanol, and the mass volume ratio of the surfactant to ethanol is 1g:2-3mL.

4. The method according to claim 1, wherein The plastic recycled material in step (2) includes one or more of flower bud recycled material, drip irrigation tape recycled material and bottle cap recycled material, and the compatibilizer is selected from one or both of maleic anhydride grafted SEBS and maleic anhydride grafted PE.

5. The method according to claim 1, wherein The mixing in step (2) requires stirring, the stirring speed is 200-500 rpm, the stirring temperature is 90-110°C, and the stirring time is 1-2h. The granulation includes three heating processes, the first heating temperature is 140-150°C, the second heating temperature is 160-170°C, and the third heating temperature is 170-180°C.

6. The method according to any one of claims 1 to 5, characterized in that The mass ratio of the lubricant, antioxidant, surfactant, plastic recycling material, tackifying resin and compatibilizer is 1-3:0.5-1.5:3-6:70-90:2-5:3-10.

7. Use of the method according to any one of claims 1 to 6 in preparing cable wire materials.

Images