Electric power conduit capable of performing electromagnetic shielding and preparation method thereof

Abstract

The invention discloses an electric power conduit capable of performing electromagnetic shielding and a preparation method thereof. The electric power conduit is prepared from PVC resin, conductive mica, ferroferric oxide, a coupling agent, a plasticizer, an anti-impact additive, a stabilizer, a lubricant, an antioxidant and pigment as raw materials. The preparation method of the electric conduit comprises the following steps: S1, adding the PVC resin, the conductive mica, the ferroferric oxide, the coupling agent and the plasticizer into a high-speed mixing pot, and uniformly mixing at a low speed; s2, adding the anti-impact aid, the stabilizer, the lubricant, the antioxidant and the pigment into a high-speed mixing pot, uniformly mixing at a high speed, and cooling; and S3, adding the cooled mixed material into a double-screw extruder, and after extrusion molding is completed, cooling and shaping to obtain the electric conduit capable of performing electromagnetic shielding. The electric power conduit has good electromagnetic wave absorption and shielding performance and good electromagnetic shielding performance, and the mechanical performance, the low temperature resistance and other performance meet the requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power conduits, and in particular to an electric power conduit capable of performing electromagnetic shielding and a preparation method thereof. Background Art

[0002] With the rapid development of the information industry, the problem of electromagnetic radiation has become increasingly prominent and has become the fourth largest pollution after air pollution, water pollution and noise pollution. With the rapid development of the electronics industry, various commercial and household appliances have increased rapidly. Electronic products use a large number of integrated circuit components, which emit high-frequency pulse electromagnetic radiation when working. Moreover, electronic components are developing in the direction of miniaturization, digitization and integration, and are easily disturbed by external electromagnetic waves and malfunction. In order to solve the problems caused by electromagnetic radiation, it is necessary to use electromagnetic shielding materials to shield the protected objects.

[0003] PVC electromagnetic shielding tube has the characteristics of light weight, good insulation, good electromagnetic shielding performance and low cost. It has become a substitute for traditional PVC power casing and is widely used in home decoration, smart parks (factories), public transportation signal systems, major scientific research institutes, confidentiality agencies, military facilities and other fields or places.

[0004] At present, PVC electromagnetic shielding pipes are mainly realized by wrapping an electromagnetic shielding layer, such as aluminum foil, outside an ordinary PVC power conduit. This method is complicated to operate, and after a period of use, the wrapped electromagnetic shielding layer is easy to fall off, resulting in a decrease in electromagnetic shielding performance. Summary of the invention

[0005] In order to solve the problems existing in the above-mentioned prior art, the present invention provides an electric conduit capable of electromagnetic shielding and a preparation method thereof. The electric conduit has good absorption and shielding performance for electromagnetic waves, good electromagnetic shielding performance, and the mechanical properties and low temperature resistance and other properties meet the requirements.

[0006] The preparation method of the cable power is simple, easy to operate and has low preparation cost.

[0007] The technical solution adopted to achieve the above-mentioned purpose of the present invention is:

[0008] An electric power conduit capable of performing electromagnetic shielding is prepared from the following raw materials in parts by weight:

[0009]

[0010]

[0011] Furthermore, the coupling agent is a titanate coupling agent, and the coupling agent is selected from any one of triisostearate isopropyl titanate and tetraisopropyl di(dioctylphosphite) titanate.

[0012] Furthermore, the plasticizer is dioctyl phthalate.

[0013] Furthermore, the anti-impact agent is ACR anti-impact agent.

[0014] Furthermore, the stabilizer is one of an organic tin stabilizer and a calcium zinc stabilizer.

[0015] Furthermore, the lubricant is one of ethylene bis stearamide, polyethylene wax, Fischer-Tropsch wax, oxidized polyethylene wax, pentaerythritol stearate and glyceryl monostearate, or a combination of several of them.

[0016] Furthermore, the antioxidant is selected from at least one of antioxidant 264, antioxidant 2246 and antioxidant 1076.

[0017] Furthermore, the pigment is ultramarine diluted 100 times by PVC resin.

[0018] A method for preparing an electric power conduit capable of performing electromagnetic shielding comprises the following steps:

[0019] S1. Add PVC resin, conductive mica, ferroferric oxide, coupling agent and plasticizer into a mixer at a low speed and mix evenly;

[0020] S2, adding impact resistance, stabilizer, lubricant, antioxidant and pigment into the mixer and mixing at high speed;

[0021] S3, adding the mixed material into a twin-screw extruder, and after the extrusion molding is completed, cooling and shaping are then performed to obtain the electric power conduit capable of performing electromagnetic shielding.

[0022] Further, the processing temperature of the twin-screw extruder barrel is 170-210°C, wherein the temperature of zone one is 180-190°C, the temperature of zone two is 190-200°C, the temperature of zone three is 180-190°C, the temperature of zone four is 180-185°C, the temperature of zone five is 175-180°C, the temperature of the molding mold is 170-210°C, the temperature of zone one is 170-180°C, the temperature of zone two is 180-190°C, the temperature of zone three is 195-210°C, the temperature of zone four is 200-210°C, and the temperature of zone five is 170-190°C.

[0023] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0024] 1. The present invention uses conductive mica and ferroferric oxide as conductive fillers, which produce a synergistic effect and significantly improve the electromagnetic shielding performance of the power conduit, so that the power conduit has better absorption and shielding performance for electromagnetic waves, which can greatly reduce the impact of external electromagnetic radiation on signal transmission, and can also reduce the impact of electromagnetic radiation on human health.

[0025] 2. Since the present invention uses conductive mica and ferroferric oxide as conductive fillers, the heat deformation temperature and flame retardancy of the power conduit can be improved, while other properties meet the requirements. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to specific embodiments, but these embodiments are not to be interpreted as limiting the protection scope of the present invention in any sense.

[0027] The sources of the raw materials used in the embodiments and comparative examples are as follows:

[0028] The PVC resin is SG-5 resin, produced by Qilu Petrochemical, with the brand name S1000;

[0029] Conductive mica powder was purchased from Shenzhen Haiyang Powder Technology Co., Ltd.

[0030] Ferroferric oxide powder was purchased from Tianjin Hi-Tech New Materials Co., Ltd.

[0031] Dioctyl phthalate was purchased from Hefei Jinlai Chemical Co., Ltd.

[0032] Isopropyl titanate triisostearate was purchased from Hubei Fangde New Materials Co., Ltd., brand C3205.

[0033] ACR was purchased from Dow Chemical, brand KM-606P.

[0034] Calcium zinc stabilizer was purchased from Shanghai Kunrui Chemical Co., Ltd., brand MC8763-10CP.

[0035] Ethylene bisstearamide was purchased from Hubei Xinghengye Technology Co., Ltd.

[0036] The brand of polyethylene wax used is BN108, and the softening point is 108℃.

[0037] The ultramarine is ultramarine diluted 100 times. The specific dilution method is: add 1 part of ultramarine to 100 parts of polyvinyl chloride resin, stir evenly, and obtain ultramarine diluted 100 times.

[0038] Example 1

[0039] An electric power conduit capable of performing electromagnetic shielding is prepared from the following raw materials in parts by weight:

[0040]

[0041]

[0042] The preparation method of the above-mentioned electric power conduit capable of electromagnetic shielding is as follows:

[0043] 1. Add PVC resin, conductive mica powder, ferroferric oxide powder, isopropyl titanate triisostearate and dioctyl phthalate into a high mixing pot, control the speed of the high mixing pot to 100r / min, and mix evenly.

[0044] 2. Add ACR, calcium zinc stabilizer, ethylene bisstearamide, polyethylene wax, antioxidant 168 and pigment into a high-speed mixer, control the speed of the high-speed mixer to 800r / min, mix evenly, and put into a cold mixer after the temperature reaches 120°C. Discharge the materials after the temperature of the cold mixer drops to 45°C.

[0045] 3. The cooled mixed material is conveyed to a 65-type conical twin-screw extruder, and the extruder current is set to 85A, the temperature of the barrel zone 1 is 185°C, the temperature of the zone 2 is 195°C, the temperature of the zone 3 is 185°C, the temperature of the zone 4 is 182°C, the temperature of the zone 5 is 178°C, the temperature of the molding die zone 1 is 175°C, the temperature of the zone 2 is 185°C, the temperature of the zone 3 is 200°C, the temperature of the zone 4 is 205°C, and the temperature of the zone 5 is 180°C. After the extrusion molding is completed, it is then cooled and shaped to obtain the electric power conduit.

[0046] Example 2

[0047] An electric power conduit capable of performing electromagnetic shielding is prepared from the following raw materials in parts by weight:

[0048]

[0049] The preparation method of the above-mentioned electric power conduit capable of electromagnetic shielding is as follows:

[0050] 1. Add PVC resin, conductive mica powder, ferroferric oxide powder, isopropyl titanate triisostearate and dioctyl phthalate into a high mixing pot, control the speed of the high mixing pot to 100r / min, and mix evenly.

[0051] 2. Add ACR, calcium zinc stabilizer, ethylene bisstearamide, polyethylene wax, antioxidant 168 and pigment into a high-speed mixer, control the speed of the high-speed mixer to 800r / min, mix evenly, and put into a cold mixer after the temperature reaches 120°C. Discharge the materials after the temperature of the cold mixer drops to 45°C.

[0052] 3. The cooled mixed material is conveyed to a 65-type conical twin-screw extruder, and the extruder current is set to 85A, the temperature of the barrel zone 1 is 185°C, the temperature of the zone 2 is 195°C, the temperature of the zone 3 is 185°C, the temperature of the zone 4 is 182°C, the temperature of the zone 5 is 178°C, the temperature of the molding die zone 1 is 175°C, the temperature of the zone 2 is 185°C, the temperature of the zone 3 is 200°C, the temperature of the zone 4 is 205°C, and the temperature of the zone 5 is 180°C. After the extrusion molding is completed, it is then cooled and shaped to obtain the electric power conduit.

[0053] Example 3

[0054] An electric power conduit capable of performing electromagnetic shielding is prepared from the following raw materials in parts by weight:

[0055]

[0056] The preparation method of the above-mentioned electric power conduit capable of electromagnetic shielding is as follows:

[0057] 1. Add PVC resin, conductive mica powder, ferroferric oxide powder, isopropyl titanate triisostearate and dioctyl phthalate into a high mixing pot, control the speed of the high mixing pot to 100r / min, and mix evenly.

[0058] 2. Add ACR, calcium zinc stabilizer, ethylene bisstearamide, polyethylene wax, antioxidant 168 and pigment into a high-speed mixer, control the speed of the high-speed mixer to 800r / min, mix evenly, and put into a cold mixer after the temperature reaches 120°C. Discharge the materials after the temperature of the cold mixer drops to 45°C.

[0059] 3. The cooled mixed material is conveyed to a 65-type conical twin-screw extruder, and the extruder current is set to 85A, the temperature of the barrel zone 1 is 185°C, the temperature of the zone 2 is 195°C, the temperature of the zone 3 is 185°C, the temperature of the zone 4 is 182°C, the temperature of the zone 5 is 178°C, the temperature of the molding die zone 1 is 175°C, the temperature of the zone 2 is 185°C, the temperature of the zone 3 is 200°C, the temperature of the zone 4 is 205°C, and the temperature of the zone 5 is 180°C. After the extrusion molding is completed, it is then cooled and shaped to obtain the electric power conduit.

[0060] Comparative Example 1

[0061] An electric power conduit is prepared from the following raw materials in parts by weight:

[0062]

[0063] The preparation method of the above-mentioned power conduit is as follows:

[0064] 1. Add PVC resin, ferrosoferrate powder, isopropyl titanate triisostearate and dioctyl phthalate into a high mixing pot, control the speed of the high mixing pot to 100r / min, and mix evenly.

[0065] 2. Add ACR, calcium zinc stabilizer, ethylene bisstearamide, polyethylene wax, antioxidant 168 and pigment into a high-speed mixer, control the speed of the high-speed mixer to 800r / min, mix evenly, and put into a cold mixer after the temperature reaches 120°C. Discharge the materials after the temperature of the cold mixer drops to 45°C.

[0066] 3. The cooled mixed material is conveyed to a 65-type conical twin-screw extruder, and the extruder current is set to 85A, the temperature of the barrel zone 1 is 185°C, the temperature of the zone 2 is 195°C, the temperature of the zone 3 is 185°C, the temperature of the zone 4 is 182°C, the temperature of the zone 5 is 178°C, the temperature of the molding die zone 1 is 175°C, the temperature of the zone 2 is 185°C, the temperature of the zone 3 is 200°C, the temperature of the zone 4 is 205°C, and the temperature of the zone 5 is 180°C. After the extrusion molding is completed, it is then cooled and shaped to obtain the electric power conduit.

[0067] Comparative Example 2

[0068] An electric power conduit is prepared from the following raw materials in parts by weight:

[0069]

[0070]

[0071] The preparation method of the above-mentioned power conduit is as follows:

[0072] 1. Add PVC resin, conductive mica powder, isopropyl titanate triisostearate and dioctyl phthalate into a high mixing pot, control the speed of the high mixing pot to 100r / min, and mix evenly.

[0073] 2. Add ACR, calcium zinc stabilizer, ethylene bisstearamide, polyethylene wax, antioxidant 168 and pigment into a high-speed mixer, control the speed of the high-speed mixer to 800r / min, mix evenly, and put into a cold mixer after the temperature reaches 120°C. Discharge the materials after the temperature of the cold mixer drops to 45°C.

[0074] 3. The cooled mixed material is conveyed to a 65-type conical twin-screw extruder, and the extruder current is set to 85A, the temperature of the barrel zone 1 is 185°C, the temperature of the zone 2 is 195°C, the temperature of the zone 3 is 185°C, the temperature of the zone 4 is 182°C, the temperature of the zone 5 is 178°C, the temperature of the molding die zone 1 is 175°C, the temperature of the zone 2 is 185°C, the temperature of the zone 3 is 200°C, the temperature of the zone 4 is 205°C, and the temperature of the zone 5 is 180°C. After the extrusion molding is completed, it is then cooled and shaped to obtain the electric power conduit.

[0075] Comparative Example 3

[0076] An electric power conduit is prepared from the following raw materials in parts by weight:

[0077]

[0078]

[0079] The preparation method of the above-mentioned power conduit is as follows:

[0080] 1. Add PVC resin, isopropyl titanate triisostearate and dioctyl phthalate into a high mixing pot, control the speed of the high mixing pot to 100r / min, and mix evenly.

[0081] 2. Add ACR, calcium zinc stabilizer, ethylene bisstearamide, polyethylene wax, antioxidant 168 and pigment into a high-speed mixer, control the speed of the high-speed mixer to 800r / min, mix evenly, and put into a cold mixer after the temperature reaches 120°C. Discharge the materials after the temperature of the cold mixer drops to 45°C.

[0082] 3. The obtained mixed material is conveyed to a 65-type conical twin-screw extruder, and the extruder current is set to 85A, the temperature of the barrel zone 1 is 185°C, the temperature of the zone 2 is 195°C, the temperature of the zone 3 is 185°C, the temperature of the zone 4 is 182°C, the temperature of the zone 5 is 178°C, the temperature of the zone 1 of the molding die is 175°C, the temperature of the zone 2 is 185°C, the temperature of the zone 3 is 200°C, the temperature of the zone 4 is 205°C, and the temperature of the zone 5 is 180°C. After the extrusion molding is completed, it is then cooled and shaped to obtain the electric power conduit.

[0083] The power conduits prepared in Examples 1-3 and Comparative Examples 1-3 were tested to test the performance parameters of the cable conduits such as SE value, Vicat softening temperature and limiting oxygen index in the high frequency band (8-30 GHz). The SE value test was based on the national standard GB / T32511-2016 "General Technical Requirements for Electromagnetic Shielding Plastics", and the Vicat softening temperature and limiting oxygen index were based on the standard DL / T802.3 "Technical Conditions for Conduits for Power Cables Part 3 Chlorinated Polyvinyl Chloride and Rigid Polyvinyl Chloride Plastic Cable Conduits". The test results are shown in the following table:

[0084]

[0085]

[0086] It can be seen from the above table that when both conductive mica and ferroferric oxide are used as conductive fillers, the SE value of the power conduit for the high-frequency band is significantly improved compared to when only conductive mica or ferroferric oxide is used as conductive fillers. It can be seen that conductive mica and ferroferric oxide have a synergistic effect.

[0087] In addition, when conductive mica and ferroferric oxide are used as conductive fillers, the Vicat softening point and limiting oxygen index of the power conduit can be increased, thereby improving the heat resistance and flame retardancy of the power conduit.

Claims

1. A power conduit capable of electromagnetic shielding, characterized in that It is prepared from the following raw materials in parts by weight:

2. The electromagnetically shielded electric power conduit according to claim 1, characterized in that: The coupling agent is a titanate coupling agent, and the coupling agent is selected from any one of triisostearate isopropyl titanate and tetraisopropyl di(dioctylphosphite) titanate.

3. The electromagnetically shielded electric power conduit according to claim 1, characterized in that: The plasticizer is dioctyl phthalate.

4. The electromagnetically shielded electric power conduit according to claim 1, characterized in that: The anti-impact auxiliary agent is anti-impact ACR.

5. The electromagnetically shielded electric power conduit according to claim 1, characterized in that: The stabilizer is one of an organic tin stabilizer and a calcium zinc stabilizer.

6. The electromagnetically shielded electric power conduit according to claim 1, characterized in that: The lubricant is one of ethylene bis stearamide, polyethylene wax, Fischer-Tropsch wax, oxidized polyethylene wax, pentaerythritol stearate and glyceryl monostearate, or a combination of several of them.

7. The electromagnetically shielded electric power conduit according to claim 1, characterized in that: The antioxidant is selected from at least one of antioxidant 264, antioxidant 2246 and antioxidant 1076.

8. The electromagnetically shielded electric power conduit according to claim 1, characterized in that: The pigment is ultramarine diluted 100 times by PVC resin.

9. A method for preparing an electromagnetically shielded electric power conduit according to claim 1, characterized in that The steps include: S1. Add PVC resin, conductive mica, ferroferric oxide, coupling agent and plasticizer into a high mixing pot at a low speed and mix evenly; S2, adding the impact-resistant additive, stabilizer, lubricant, antioxidant and pigment into a high-speed mixing pot, mixing at high speed and then cooling; S3, adding the cooled mixture into a twin-screw extruder, and after extrusion molding, cooling and shaping are completed to obtain the electric power conduit capable of performing electromagnetic shielding.

10. The method for preparing an electromagnetically shielded electric power conduit according to claim 9, characterized in that: The processing temperature of the twin-screw extruder barrel is 170-210°C, wherein the temperature of zone one is 180-190°C, the temperature of zone two is 190-200°C, the temperature of zone three is 180-190°C, the temperature of zone four is 180-185°C, the temperature of zone five is 175-180°C, the temperature of the molding mold is 170-210°C, the temperature of zone one is 170-180°C, the temperature of zone two is 180-190°C, the temperature of zone three is 195-210°C, the temperature of zone four is 200-210°C, and the temperature of zone five is 170-190°C.

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