Environment-friendly PVC cable sleeve
阅读说明：本技术 一种环保型pvc电缆套管 (Environment-friendly PVC cable sleeve ) 是由 陈晓梅 彭伏弟 李文权 马鑫 于 2021-10-08 设计创作，主要内容包括：本发明公开了一种环保型PVC电缆套管,属于PVC制品技术领域,包括由内至外呈同心圆依次设置的内管、金属网和外管；外管的原料包括氯化聚氯乙烯、聚氯乙烯、轻质碳酸钙、硬脂酸钠改性碱式硫酸镁晶须、改性二氧化钛、有机锡稳定剂、抗老化剂、抗冲改性剂和润滑剂；内管的原料包括氯化聚氯乙烯、轻质碳酸钙、有机锡稳定剂、改性二氧化硅、抗冲改性剂和润滑剂；改性二氧化钛和改性二氧化硅的制备方法为：将二氧化钛、二氧化硅分别和ASA颗粒混合研磨。通过设置金属网,以及在内管和外管中加入不同的无机填料,使得热量不会聚集在与电缆直接接触的内管上,有效避免了热量聚集,影响电缆正常工作的问题。(The invention discloses an environment-friendly PVC cable sleeve, which belongs to the technical field of PVC products and comprises an inner pipe, a metal mesh and an outer pipe which are sequentially arranged from inside to outside in a concentric circle; the raw materials of the outer pipe comprise chlorinated polyvinyl chloride, light calcium carbonate, sodium stearate modified basic magnesium sulfate whisker, modified titanium dioxide, an organic tin stabilizer, an anti-aging agent, an impact modifier and a lubricant; the raw materials of the inner pipe comprise chlorinated polyvinyl chloride, light calcium carbonate, an organic tin stabilizer, modified silicon dioxide, an impact modifier and a lubricant; the preparation method of the modified titanium dioxide and the modified silicon dioxide comprises the following steps: titanium dioxide, silicon dioxide and ASA particles are mixed and ground respectively. Through setting up the metal mesh to and add different inorganic fillers in inner tube and outer tube, make the heat can not gather on the inner tube with cable direct contact, effectively avoided the heat gathering, influence the problem of cable normal work.)
1. The environment-friendly PVC cable sleeve is characterized by comprising an inner pipe, a metal mesh and an outer pipe which are sequentially arranged from inside to outside in a concentric circle manner;
the outer tube comprises the following components: chlorinated polyvinyl chloride, light calcium carbonate, sodium stearate modified basic magnesium sulfate whisker, modified titanium dioxide, an organic tin stabilizer, an anti-aging agent, an impact modifier and a lubricant;
the inner tube comprises the following components: chlorinated polyvinyl chloride, light calcium carbonate, an organic tin stabilizer, modified silicon dioxide, an impact modifier and a lubricant;
the preparation method of the modified titanium dioxide comprises the following steps: mixing and grinding titanium dioxide and ASA particles for 3-4 min;
the preparation method of the modified silicon dioxide comprises the following steps: the silica and ASA particles were mixed and milled for 5-6 min.
2. The environment-friendly PVC cable sleeve according to claim 1, wherein the outer tube comprises the following components in parts by weight:
100 parts of chlorinated polyvinyl chloride and polyvinyl chloride, 10-20 parts of light calcium carbonate, 10-15 parts of sodium stearate modified basic magnesium sulfate whisker, 3-5 parts of organic tin stabilizer, 0.5-1 part of anti-aging agent, 3-5 parts of modified titanium dioxide, 6-8 parts of impact modifier and 2-3 parts of lubricant.
3. The environment-friendly PVC cable sleeve as claimed in claim 1, wherein the inner pipe comprises the following components in parts by weight:
100 parts of chlorinated polyvinyl chloride, 25-40 parts of light calcium carbonate, 3-5 parts of organic tin stabilizer, 4-7 parts of modified silicon dioxide, 5-8 parts of impact modifier and 2-3 parts of lubricant.
4. The environmentally friendly PVC cable sleeve according to claim 1, wherein the mass ratio of the silica to the ASA particles is 9:1-8:2, and the mass ratio of the titanium dioxide to the ASA particles is 8.5:1.5-7.5: 2.5.
5. The environmentally friendly PVC cable sleeve of claim 1, wherein the grinding speed is 80-100 r/min.
6. The environmentally friendly PVC cable sleeve according to claim 1, wherein the silica has a particle size of 0.4-0.8 μm.
7. The environmentally friendly PVC cable sleeve according to claim 1, wherein the light calcium carbonate has a particle size of 20-200 nm.
8. The environment-friendly PVC cable sleeve according to claim 1, wherein the lubricant is microcrystalline wax and calcium stearate in a mass ratio of 6-7: 4-3.
9. The environmentally friendly PVC cable sleeve of claim 1, wherein the impact modifier of the inner tube is CPE and the impact modifier of the outer tube is ACR.
10. The environment-friendly PVC cable sleeve according to claim 1, wherein the aging inhibitor is one or more of UV-327, UV-326, UV-P, antioxidant 1010 and antioxidant 1076.
Technical Field
The invention belongs to the technical field of PVC products, and particularly relates to an environment-friendly PVC cable sleeve.
Background
PVC is one of the most used general plastics, and the pipe made of the PVC has the advantages of small smooth resistance of the pipe wall, good water tightness, good tensile strength and compressive strength, good corrosion resistance and drug resistance, difficult influence from soil pH value and low price. These advantages make PVC pipes widely used as water supply and drainage pipes, irrigation water conveying pipes, threading pipes and the like. When the PVC pipe is used as a cable sleeve, a plurality of cables are wrapped in the PVC pipe, and the PVC sleeve generally has good flame retardance, insulation and corrosion resistance. In order to guarantee that cable sleeve has good support protection performance, often can add various fillers and modify the rigidity in order to increase the PVC pipe to the PVC pipe, but the cable can appear the problem of generating heat in the course of the work, if the heat can not in time be derived, can influence the normal work of cable, lead to the cable ageing to accelerate, life reduces, and its heat conductivity can not be considered when the design usually to the common individual layer PVC cable sleeve on the market at present, therefore the not good problem of ubiquitous heat conductivity.
Disclosure of Invention
In order to overcome the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide an environment-friendly ageing-resistant PVC cable sleeve for providing a stable working environment of a cable.
In order to solve the technical problems, the invention adopts the technical scheme that: the environment-friendly PVC cable sleeve comprises an inner pipe, a metal mesh and an outer pipe which are sequentially arranged from inside to outside in a concentric circle manner;
the outer tube comprises the following components: chlorinated polyvinyl chloride, light calcium carbonate, sodium stearate modified basic magnesium sulfate whisker, modified titanium dioxide, an organic tin stabilizer, an anti-aging agent, an impact modifier and a lubricant;
the inner tube comprises the following components: chlorinated polyvinyl chloride, light calcium carbonate, an organic tin stabilizer, modified silicon dioxide, an impact modifier and a lubricant;
the preparation method of the modified titanium dioxide comprises the following steps: mixing and grinding titanium dioxide and ASA particles for 3-4 min;
the preparation method of the modified silicon dioxide comprises the following steps: the silica and ASA particles were mixed and milled for 5-6 min.
Wherein the outer pipe comprises the following components in parts by weight: 100 parts of chlorinated polyvinyl chloride and polyvinyl chloride, 10-20 parts of light calcium carbonate, 10-15 parts of sodium stearate modified basic magnesium sulfate whisker, 3-5 parts of organic tin stabilizer, 0.5-1 part of anti-aging agent, 3-5 parts of modified titanium dioxide, 6-8 parts of impact modifier and 2-3 parts of lubricant.
Wherein the inner pipe comprises the following components in parts by weight: 100 parts of chlorinated polyvinyl chloride, 25-40 parts of light calcium carbonate, 3-5 parts of organic tin stabilizer, 4-7 parts of modified silicon dioxide, 5-8 parts of impact modifier and 2-3 parts of lubricant.
The invention has the beneficial effects that: the PVC pipe provided by the invention is a cable sleeve, a cable is arranged in the inner pipe in the using process, the modified silicon dioxide is added in the components of the inner pipe as a filler, the heat conducting property of the inner pipe can be effectively improved, the heat of the cable is effectively transferred to the metal mesh, the metal mesh also has good heat conducting property, the heat can be further transferred to the outer pipe, the outer pipe gradually exchanges the heat with the surrounding environment, the heat cannot be accumulated on the inner pipe which is directly contacted with the cable, and the problem that the heat accumulated on the cable sleeve cannot be quickly dissipated to influence the normal work of the cable is avoided.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description will be given with reference to the embodiments.
The invention provides an environment-friendly PVC cable sleeve, which comprises an inner pipe, a metal mesh and an outer pipe which are sequentially arranged from inside to outside in a concentric circle manner;
the outer tube comprises the following components: chlorinated polyvinyl chloride, light calcium carbonate, sodium stearate modified basic magnesium sulfate whisker, modified titanium dioxide, an organic tin stabilizer, an anti-aging agent, an impact modifier and a lubricant;
the inner tube comprises the following components: chlorinated polyvinyl chloride, light calcium carbonate, an organic tin stabilizer, modified silicon dioxide, an impact modifier and a lubricant;
the preparation method of the modified titanium dioxide comprises the following steps: mixing and grinding titanium dioxide and ASA particles for 3-4 min;
the preparation method of the modified silicon dioxide comprises the following steps: the silica and ASA particles were mixed and milled for 5-6 min.
The invention has the beneficial effects that: the PVC pipe provided by the invention is a cable sleeve, a cable is arranged in the inner pipe in the using process, the modified silicon dioxide is added in the components of the inner pipe as a filler, the heat conducting property of the inner pipe can be effectively improved, the heat of the cable is effectively transferred to the metal mesh, the metal mesh also has good heat conducting property, the heat can be further transferred to the outer pipe, the outer pipe gradually exchanges the heat with the surrounding environment, and the heat cannot be accumulated on the inner pipe which is directly contacted with the cable, so that the PVC pipe is different from the existing single-layer sleeve structure, and the problems that the heat is accumulated on the cable sleeve and cannot be quickly dissipated to influence the normal work of the cable are effectively avoided;
meanwhile, the PVC pipe provided by the invention is a cable sleeve, the inner pipe and the outer pipe are respectively prepared by using different formulas, different performances are endowed, the outer pipe has good rigidity, and can provide good supporting effect and flame retardant effect even after being buried, and the inner pipe has good wrapping, buffering and heat conducting effects;
meanwhile, the PVC pipe provided by the invention is a cable sleeve, the problem of poor compatibility of inorganic filler and polymer is effectively solved by adopting ASA particles to perform surface modification on titanium dioxide and silicon dioxide, and the modified silicon dioxide and titanium dioxide have good compatibility with other components, so that the modified silicon dioxide and titanium dioxide can be added as filler to fully play a role in raising the performance of the pipe material; the titanium dioxide in the outer tube can be used as an ultraviolet screening agent, the silicon dioxide particles can absorb ultraviolet light below 390nm, the ageing resistance of PVC can be improved by adding the silicon dioxide, but not all types of silicon dioxide can play a role in improving the ageing resistance of PVC. The anatase type silicon dioxide has photocatalytic activity, which can cause PVC to be subjected to oxidative degradation and accelerate the aging of a PVC pipe, and rutile type silicon dioxide is commonly used in PVC, but even though rutile type silicon dioxide also has photocatalytic defects, a layer of inorganic film such as aluminum oxide or silicon dioxide is usually coated, so that the photocatalytic activity points in the crystal structure of the rutile type silicon dioxide are shielded; the prepared PVC cable sleeve has good aging resistance and long service life even if used in an environment capable of transmitting ultraviolet rays, avoids the problem of waste of various resources caused by frequent replacement, and is more environment-friendly;
meanwhile, the invention provides a mechanical modification method for modifying silicon dioxide and titanium dioxide, and the modification method is simple, easy to operate, rapid and efficient, and convenient for enterprises to directly modify after purchasing raw materials.
Further, the outer pipe comprises the following components in parts by weight: 100 parts of chlorinated polyvinyl chloride and polyvinyl chloride, 10-20 parts of light calcium carbonate, 10-15 parts of sodium stearate modified basic magnesium sulfate whisker, 3-5 parts of organic tin stabilizer, 0.5-1 part of anti-aging agent, 3-5 parts of modified titanium dioxide, 6-8 parts of impact modifier and 2-3 parts of lubricant.
Further, the inner pipe comprises the following components in parts by weight: 100 parts of chlorinated polyvinyl chloride, 25-40 parts of light calcium carbonate, 3-5 parts of organic tin stabilizer, 4-7 parts of modified silicon dioxide, 5-8 parts of impact modifier and 2-3 parts of lubricant.
Further, the mass ratio of the silicon dioxide to the ASA particles is 9:1-8:2, and the mass ratio of the titanium dioxide to the ASA particles is 8.5:1.5-7.5: 2.5.
Further, a ball mill is adopted for grinding, and the grinding rotating speed is 80-100 r/min.
Further, the particle size of the silicon dioxide and the titanium dioxide is 0.4-0.8 μm.
From the above description, the mass ratio of silica, titania and ASA particles and the grinding speed can significantly affect the modification effect, and compositions with the mass ratio being too high or lower can affect the binding property of silica, titania and ASA particles, affect the ASA coating effect on the surfaces of silica and titania, and have the problems of particle agglomeration and poor dispersibility when the content of silica and titania is too high. Meanwhile, the particle sizes of the silicon dioxide and the titanium dioxide are not easy to be too small, the ultrafine particles are easy to agglomerate in the modification process, and the modification effect is general. The rotational speed during grinding is difficult for too fast, can appear the problem of granule reunion, and the rotational speed is low excessively and can appear modifying insufficient problem, and the unilateral extension modification time can not promote the modification effect under low rotational speed yet.
Furthermore, the particle size of the light calcium carbonate is 20-200 nm.
As is apparent from the above description, precipitated calcium carbonate as a filler has a reinforcing effect on the product, and the precipitated calcium carbonate having the above particle size has a better reinforcing effect.
Further, the lubricant is microcrystalline wax and calcium stearate in a mass ratio of 6-7: 4-3.
From the above description, it is clear that the microcrystalline wax and the calcium stearate, respectively, can act as lubricants during different periods of processing.
Further, the impact modifier of the inner tube is Chlorinated Polyethylene (CPE) and the impact modifier of the outer tube is ACR.
As can be seen from the above description, the addition of the impact modifier can effectively improve the impact resistance of the obtained product, and different impact modifiers can be used in combination according to different use scenes of the inner pipe and the outer pipe.
Further, the anti-aging agent is one or more of UV-327, UV-326, UV-P, antioxidant 1010 and antioxidant 1076.
As can be seen from the above description, the addition of the antioxidant and the anti-ultraviolet agent can effectively improve the aging resistance of the obtained product because the outer tube is in direct contact with the external environment.
The preparation method of the environment-friendly PVC cable sleeve comprises the following steps:
step 1, preparing an inner tube master batch: sequentially adding the raw materials in the inner tube, stirring at the temperature of 110-120 ℃, cooling to the temperature below 65 ℃, and stirring to obtain a mixture A; plasticizing, extruding and granulating the mixture A at the temperature of 160-200 ℃ to obtain an inner tube master batch;
step 2, preparing an outer tube master batch: sequentially adding the raw materials of the outer tube, stirring at the temperature of 110-120 ℃, cooling to the temperature below 65 ℃, and stirring to obtain a mixture B; plasticizing, extruding and granulating the mixture B at the temperature of 160-200 ℃ to obtain outer tube master batch;
and 3, adopting inner tube master batch to manufacture an inner tube through extrusion, vacuum sizing, traction and fixed length cutting, then coating the outer side wall of the inner tube with a metal mesh, and then injecting and molding the outer side of the inner tube to mix the outer tube master batch into the outer tube to form the outer tube.
Further, the raw materials in step 1 and step 2 are charged in the order of first charging the PVC, CPVC and impact modifier; then adding light calcium carbonate, modified silicon dioxide, modified titanium dioxide and sodium stearate modified basic magnesium sulfate whisker, and finally adding organic tin stabilizer, anti-aging agent and lubricant.
Further, the stirring time at the temperature of 110-120 ℃ in the step 1 is 20-30min, and the stirring time after cooling to the temperature below 65 ℃ is 10-15 min.
As can be seen from the above description, the feeding sequence, the stirring temperature and the stirring time can significantly affect the effect of the dispersed mixing of the raw materials and the physical properties of the obtained product.
The first embodiment of the invention is as follows:
the environment-friendly PVC cable sleeve comprises an inner pipe, a metal mesh and an outer pipe which are sequentially arranged from inside to outside in a concentric circle manner;
the metal net is made of copper;
the outer tube comprises the following components: 70kg of chlorinated polyvinyl chloride, 30kg of polyvinyl chloride, 20kg of light calcium carbonate, 10kg of sodium stearate modified basic magnesium sulfate whisker, 4kg of organic tin stabilizer, 0.5kg of anti-aging agent, 4kg of modified titanium dioxide, ACR6kg and 2.5kg of lubricant;
the inner tube comprises the following components: 100kg of chlorinated polyvinyl chloride, 30kg of light calcium carbonate, 3.5kg of organic tin stabilizer, 5kg of modified silicon dioxide, 6.5kg of CPE6 and 2kg of lubricant;
the preparation method of the modified titanium dioxide comprises the following steps: mixing and grinding titanium dioxide and ASA particles for 3 min; the rotation speed of grinding is 80 r/min; the titanium dioxide is rutile type titanium dioxide;
the preparation method of the modified silicon dioxide comprises the following steps: mixing and grinding silicon dioxide and ASA particles for 5 min; the rotation speed of grinding is 80 r/min;
the mass ratio of the silicon dioxide to the ASA particles is 9:1, and the mass ratio of the titanium dioxide to the ASA particles is 8.5: 1.5;
the particle size of the silicon dioxide is 0.6-0.8 mu m; the particle size of the titanium dioxide is 0.4-0.6 μm;
the particle size of the light calcium carbonate is 20-200 nm;
the lubricant is microcrystalline wax and calcium stearate in a mass ratio of 7: 3;
the anti-aging agent comprises UV-326 and an antioxidant 1010 in a mass ratio of 1: 1.
The preparation method of the environment-friendly PVC cable sleeve comprises the following steps:
step 1, preparing an inner tube master batch: sequentially adding the raw materials in the inner tube, stirring at 120 deg.C for 20min, cooling to below 65 deg.C, and stirring for 10-15min to obtain mixture A; plasticizing, extruding and cutting the mixture A at the temperature of 160-200 ℃ to obtain an inner tube master batch;
step 2, preparing an outer tube master batch: sequentially adding the raw materials of the outer tube, stirring at 120 deg.C for 20min, cooling to below 65 deg.C, and stirring for 10-15min to obtain mixture B; plasticizing, extruding and cutting the mixture B at the temperature of 160-200 ℃ to obtain outer tube master batch;
wherein, the raw materials in the step 1 and the step 2 are firstly added with PVC, CPVC and an impact modifier; then adding light calcium carbonate, modified silicon dioxide, modified titanium dioxide and sodium stearate modified basic magnesium sulfate whisker, and finally adding an organic tin stabilizer, an anti-aging agent and a lubricant;
and 3, adopting inner tube master batch to manufacture an inner tube through extrusion, vacuum sizing, traction and fixed length cutting, then coating the outer side wall of the inner tube with a metal mesh, and then injecting and molding the outer side of the inner tube to mix the outer tube master batch into the outer tube to form the outer tube.
The second embodiment of the invention is as follows:
the environment-friendly PVC cable sleeve comprises an inner pipe, a metal mesh and an outer pipe which are sequentially arranged from inside to outside in a concentric circle manner;
the outer tube comprises the following components: 60kg of chlorinated polyvinyl chloride, 40kg of polyvinyl chloride, 10kg of light calcium carbonate, 15kg of sodium stearate modified basic magnesium sulfate whisker, 4kg of organic tin stabilizer, 0.6kg of anti-aging agent, 5kg of modified titanium dioxide, 7kg of ACR and 2kg of lubricant;
the inner tube comprises the following components: 100kg of chlorinated polyvinyl chloride, 40kg of light calcium carbonate, 4kg of organic tin stabilizer, 6kg of modified silicon dioxide, 6kg of CPE and 2.2kg of lubricant;
the preparation method of the modified titanium dioxide comprises the following steps: mixing and grinding titanium dioxide and ASA particles for 4 min; the rotation speed of grinding is 90 r/min; the titanium dioxide is anatase titanium dioxide;
the preparation method of the modified silicon dioxide comprises the following steps: mixing and grinding silicon dioxide and ASA particles for 6 min; the rotation speed of grinding is 90 r/min;
the mass ratio of the silicon dioxide to the ASA particles is 8:2, and the mass ratio of the titanium dioxide to the ASA particles is 8: 2;
the particle size of the silicon dioxide is 0.6-0.8 mu m; the particle size of the titanium dioxide is 0.4-0.6 μm;
the particle size of the light calcium carbonate is 20-200 nm;
the lubricant is microcrystalline wax and calcium stearate in a mass ratio of 7: 3;
the anti-aging agent comprises UV-327 and an antioxidant 1076 in a mass ratio of 1: 1.
The preparation method of the environment-friendly PVC cable sleeve comprises the following steps:
step 1, preparing an inner tube master batch: sequentially adding the raw materials in the inner tube, stirring at 110 deg.C for 30min, cooling to below 65 deg.C, and stirring for 10min to obtain mixture A; plasticizing, extruding and cutting the mixture A at the temperature of 160-200 ℃ to obtain an inner tube master batch;
step 2, preparing an outer tube master batch: sequentially adding the raw materials of the outer tube, stirring for 30min at 110 ℃, cooling to below 65 ℃, and stirring for 10min to obtain a mixture B; plasticizing, extruding and cutting the mixture B at the temperature of 160-200 ℃ to obtain outer tube master batch;
wherein, the raw materials in the step 1 and the step 2 are firstly added with PVC, CPVC and an impact modifier; then adding light calcium carbonate, modified silicon dioxide, modified titanium dioxide and sodium stearate modified basic magnesium sulfate whisker, and finally adding an organic tin stabilizer, an anti-aging agent and a lubricant;
and 3, adopting inner tube master batch to manufacture an inner tube through extrusion, vacuum sizing, traction and fixed length cutting, then coating the outer side wall of the inner tube with a metal mesh, and then injecting and molding the outer side of the inner tube to mix the outer tube master batch into the outer tube to form the outer tube.
The third embodiment of the invention is as follows:
the environment-friendly PVC cable sleeve comprises an inner pipe, a metal mesh and an outer pipe which are sequentially arranged from inside to outside in a concentric circle manner;
the outer tube comprises the following components: 70kg of chlorinated polyvinyl chloride, 30kg of polyvinyl chloride, 15kg of light calcium carbonate, 15kg of sodium stearate modified basic magnesium sulfate whisker, 5kg of organic tin stabilizer, 1kg of anti-aging agent, 3kg of modified titanium dioxide, 8kg of ACR and 3kg of lubricant;
the inner tube comprises the following components: 100kg of chlorinated polyvinyl chloride, 40kg of light calcium carbonate, 5kg of organic tin stabilizer, 4kg of modified silicon dioxide, 8kg of CPE and 2.5kg of lubricant;
the preparation method of the modified titanium dioxide comprises the following steps: mixing and grinding titanium dioxide and ASA particles for 3 min; the rotation speed of grinding is 100 r/min; the titanium dioxide is rutile type titanium dioxide;
the preparation method of the modified silicon dioxide comprises the following steps: mixing and grinding silicon dioxide and ASA particles for 5 min; the rotation speed of grinding is 100 r/min;
the mass ratio of the silicon dioxide to the ASA particles is 9:1, and the mass ratio of the titanium dioxide to the ASA particles is 7.5: 2.5;
the particle size of the silicon dioxide is 0.6-0.8 mu m; the particle size of the titanium dioxide is 0.4-0.6 μm;
the particle size of the light calcium carbonate is 20-200 nm;
the lubricant is microcrystalline wax and calcium stearate in a mass ratio of 6: 4;
the anti-aging agent comprises UV-P and an antioxidant 1010 in a mass ratio of 1: 1.
The preparation method of the environment-friendly PVC cable sleeve is the same as that of the embodiment 1.
The fourth embodiment of the invention is as follows:
the environment-friendly PVC cable sleeve comprises an inner pipe, a metal mesh and an outer pipe which are sequentially arranged from inside to outside in a concentric circle manner;
the outer tube comprises the following components: 70kg of chlorinated polyvinyl chloride, 30kg of polyvinyl chloride, 18kg of light calcium carbonate, 12kg of sodium stearate modified basic magnesium sulfate whisker, 3kg of organic tin stabilizer, 0.8kg of anti-aging agent, 4kg of modified titanium dioxide, 6kg of ACR and 2-3kg of lubricant;
the inner tube comprises the following components: 100kg of chlorinated polyvinyl chloride, 25kg of light calcium carbonate, 4kg of organic tin stabilizer, 7kg of modified silicon dioxide, 7kg of CPE and 3kg of lubricant;
the modified silica, the modified titanium dioxide, the age resister, the light calcium carbonate and the lubricant are the same as those in example 1;
the preparation method of the environment-friendly PVC cable sleeve is the same as that of the embodiment 1.
The fifth embodiment of the invention is as follows:
the environment-friendly PVC cable sleeve comprises an inner pipe, a metal mesh and an outer pipe which are sequentially arranged from inside to outside in a concentric circle manner;
the outer tube comprises the following components: 70kg of chlorinated polyvinyl chloride and 30kg of polyvinyl chloride, 16kg of light calcium carbonate, 14kg of sodium stearate modified basic magnesium sulfate whisker, 3.5kg of organic tin stabilizer, 0.5kg of anti-aging agent, 3kg of modified titanium dioxide, 6-8kg of ACR and 2.8kg of lubricant;
the inner tube comprises the following components: 100kg of chlorinated polyvinyl chloride, 26kg of light calcium carbonate, 3kg of organic tin stabilizer, 6kg of modified silicon dioxide, 5kg of CPE and 2kg of lubricant;
the anti-aging agent is prepared from the following components in percentage by mass: 1: 1:1 of UV-326, UV-P, antioxidant 1010 and antioxidant 1076;
the modified silica, the modified titanium dioxide, the lubricant and the light calcium carbonate are the same as those in the embodiment 1;
the preparation method of the environment-friendly PVC cable sleeve is the same as that of the embodiment 1.
The first comparative example of the present invention is:
the difference between the first comparative example and the first example is that silica and titania are directly added without modification, and ASA particles are added as an auxiliary agent together with silica or titania and mixed to make an inner tube master batch and an outer tube master batch.
The second comparative example of the present invention is:
comparative example two differs from example one in that the silica and titania were added directly without modification and no ASA particles were added.
The third comparative example of the present invention is:
the difference between the comparative example No. three and the example No. one is that the titanium dioxide modification was carried out at a titanium dioxide to ASA particle mass ratio of 7: 3.
Comparative example four of the present invention is:
comparative example four differs from example one in that the particle size of the titanium dioxide and silicon dioxide is 20-200 nm.
PVC in all examples and comparative examples is PVC-SG5, the organic tin stabilizer is organic tin 181 heat stabilizer, and the raw materials with the same names in all examples and comparative examples are from the same source.
The outer tube materials obtained in example 1 and comparative examples 1 to 4 were subjected to the tests for mechanical properties and aging resistance, and the results are shown in tables 1, 2 and 3. Table 2 shows the relationship between tensile strength and aging time, and Table 3 shows the relationship between impact strength and aging time. The anti-aging performance test is to place all samples outdoors, carry out a parallel aging test, and sample according to the day intervals to test. The inner tube materials obtained in example 1 and comparative examples 1 to 4 were subjected to mechanical property tests, and the results are shown in FIG. 4.
TABLE 1
Tensile Property (MPa)
Flexural Property (MPa)
Impact Strength (kJ/m)2)
Reference standard
GB/T 1040.1-2018
GB/T 9341-2008
GB/T 1043.1-2008
Example 1
63.5
110.5
18.4
Comparative example 1
56.8
104.6
13.2
Comparative example 2
52.3
102.5
12.6
Comparative example 3
59.4
108.3
15.8
Comparative example 4
58.7
107.9
16.0
TABLE 2
Day 0
20 days
40 days
60 days
80 days
100 days
120 days
Example 1
63.5
62.9
61.7
61.3
60.8
60.2
59.8
Comparative example 1
56.8
55.2
54.6
53.3
51.9
51.2
50.7
Comparative example 2
52.3
50.4
48.2
46.7
44.3
42.9
41.8
Comparative example 3
59.4
58.3
57.1
55.9
55.2
54.9
54.3
Comparative example 4
58.7
57.6
56.3
55.8
55.2
54.7
54.2
TABLE 3
TABLE 4
Tensile Property (MPa)
Flexural Property (MPa)
Impact Strength (kJ/m)2)
Reference standard
GB/T 1040.1-2018
GB/T 9341-2008
GB/T 1043.1-2008
Example 1
64.8
112.4
19.6
Comparative example 1
57.1
106.8
14.1
Comparative example 2
54.7
104.3
11.3
Comparative example 3
60.2
109.8
16.2
Comparative example 4
59.5
110.2
16.1
In conclusion, the PVC pipe provided by the invention is a cable sleeve, a cable is arranged in an inner pipe in the using process, modified silicon dioxide is added in the components of the inner pipe as a filler, the heat conducting property of the inner pipe can be effectively improved, the heat of the cable is effectively transferred to a metal mesh, the metal mesh also has good heat conducting property, the heat can be further transferred to an outer pipe, the outer pipe gradually exchanges the heat with the surrounding environment, and the heat cannot be accumulated on the inner pipe directly contacted with the cable, so that the PVC pipe is different from the existing single-layer sleeve structure, and the problem that the heat accumulated on the cable sleeve cannot be rapidly dissipated to influence the normal work of the cable is effectively avoided;
the PVC pipe provided by the invention is a cable sleeve, the inner pipe and the outer pipe are respectively prepared by using different formulas, different performances are endowed, the outer pipe has good rigidity, and can provide good supporting effect and flame retardant effect even after being buried, and the inner pipe has good wrapping, supporting, buffering and heat conducting effects;
the PVC pipe provided by the invention is a cable sleeve, the problem of poor compatibility of inorganic filler and polymer is effectively solved by adopting ASA particles to perform surface modification on titanium dioxide and silicon dioxide, and the modified silicon dioxide and titanium dioxide have good compatibility with other components, so that the modified silicon dioxide and titanium dioxide can be added as filler to fully play a role in raising the performance of pipe fittings; by adopting ASA particles to carry out surface modification on titanium dioxide, the problems that PVC is subjected to oxidative degradation and aging of a PVC pipe is accelerated due to the fact that silicon dioxide has photocatalytic activity are effectively solved; the prepared PVC cable sleeve has good aging resistance and long service life even if used in an environment capable of transmitting ultraviolet rays, avoids the problem of waste of various resources caused by frequent replacement, and is more environment-friendly;
the invention provides a method for mechanically modifying silicon dioxide and titanium dioxide, wherein the composition, proportion and grinding speed and time of raw materials are strictly controlled in the modification process, so that the activation rate in the modification process is high, agglomeration is not easy to occur, the modification method is simple, easy to operate, rapid and efficient, and direct modification is convenient for enterprises to purchase the raw materials.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention in the specification or directly or indirectly applied to the related technical field are included in the scope of the present invention.