A kind of aging-resistant PVC material and its application in charging pile cable

Abstract

The present invention relates to G08L27, and more specifically, to an aging-resistant PVC material and its application in charging pile cables. The raw materials of the aging-resistant PVC material include 94-98 parts by weight of PVC substrate, 15-18 parts by weight of filler, 2.3-4.4 parts by weight of stabilizer, 11-13 parts of toughening agent, 0.4-0.58 parts by weight of lubricant, 8-12 parts by weight of plasticizer, 0.2-0.4 parts by weight of antioxidant, 0.2-0.4 parts by weight of ultraviolet absorber and 2-2.8 parts by weight of processing aid. The weight ratio of carbon fiber and ferrite is 1: (1-1.8). Under the action of PVC substrate, the mechanical properties of the tensile properties of the material are improved, making it not easy to wear and tear, and can maintain a good appearance gloss for a long time. The PVC material obtained by the present invention can be well applied to the production of charging pile cables and has excellent adaptability.

Description

Technical Field

[0001] The present invention relates to G08L27, and more specifically, to an aging-resistant PVC material and application thereof in a charging pile cable. Background Art

[0002] With the emergence of environmental problems and energy crisis, new energy vehicles have developed rapidly. As a basic supporting component of new energy vehicles, the demand for charging pile cables is also increasing. Charging pile cables are a kind of connecting cables, and their main raw materials are polyurethane (TPU), polyvinyl chloride (PVC), etc.

[0003] Patent No. CN108148327B provides a PVC charging pile cable material and its preparation method, adding a compound containing polyphosphazene to improve the flame retardancy of the material. Patent No. CN105602236B provides a PVC / TPU oil-resistant flame-retardant thermoplastic elastomer for new energy vehicle charging pile cables, which is modified by silane and phthalate and then mixed with PVC, so that the cable is not easily damaged after multiple drag chains.

[0004] However, existing technologies usually only consider the mechanical strength of cables, and rarely consider the interference of magnetic field signals generated by wires on charging piles. In fact, the electromagnetic generated by these wires will not only cause instability of grid voltage during charging, resulting in data sampling errors and charging pile display errors, but also increase power consumption and reduce efficiency. In severe cases, it will not only cause power outages, causing harm to charging piles, but also damage cars. Summary of the invention

[0005] In order to solve the above problems, the first aspect of the present invention provides an aging-resistant PVC material, the raw materials of which include 94-98 parts by weight of PVC substrate, 15-18 parts by weight of filler, 2.3-4.4 parts by weight of stabilizer, 11-13 parts of toughening agent, 0.4-0.58 parts by weight of lubricant, 8-12 parts by weight of plasticizer, 0.2-0.4 parts by weight of antioxidant, 0.2-0.4 parts by weight of UV absorber and 2-2.8 parts by weight of processing aid.

[0006] As a preferred technical solution of the present invention, the elongation at break of the PVC substrate is 360-400%, and the tensile stress is 8.2-8.6 MPa (100% strain, 23° C.).

[0007] As a preferred technical solution of the present invention, the filler is an inorganic filler, and the inorganic filler is magnesium hydroxide and / or fly ash.

[0008] Preferably, the inorganic filler is magnesium hydroxide and fly ash.

[0009] Further preferably, the weight ratio of magnesium hydroxide to fly ash is 1:(1-1.5).

[0010] As a preferred technical solution of the present invention, the toughening agent is selected from one or more of dioctyl sebacate, dipropylheptyl phthalate, and diisononyl phthalate.

[0011] As a preferred technical solution of the present invention, the toughening agent is dipropyl heptyl phthalate and diisononyl phthalate, and in the toughening agent, the weight ratio of dipropyl heptyl phthalate to diisononyl phthalate is 1:(2-4).

[0012] Under the electromagnetic compatibility alternating electric field of charging pile cables and charging piles, good conductor materials can usually be used to achieve the shielding effect by utilizing the anti-magnetic field of the eddy currents generated by them, that is, by repelling the anti-magnetic field, the magnetic field outside the shielding body is suppressed or offset. In a lot of thinking and experiments, the applicant found that by adding dipropyl heptyl phthalate and diisononyl phthalate to the PVC material system and adjusting the weight ratio of 1: (2-4), not only the above-mentioned shielding effect is significantly improved, but also the density of the material is reduced, making the material lighter, so that it is more convenient to use in charging pile cables. The applicant speculates that this may be because dipropyl heptyl phthalate and diisononyl phthalate can work together with carbon fiber and ferrite, so that the cross-linked network formed by carbon fiber, DPHP, DINP and PVC resin is entangled and curled, and at the same time, the distribution of ferrite electrons in the network is affected, thereby improving its shielding effect, and when the elongation at break of the PVC substrate is 360-400% and the tensile stress is 8.2-8.6MPa, the aging resistance of the PVC material is further improved.

[0013] As a preferred technical solution of the present invention, the lubricant is selected from one or more of calcium stearate, pentaerythritol stearate, polyethylene wax, and stearic acid.

[0014] Preferably, the lubricant is pentaerythritol stearate.

[0015] As a preferred technical solution of the present invention, the plasticizer is selected from one or more of epoxy triglyceride, dioctyl phthalate, and chlorinated paraffin.

[0016] As a preferred technical solution of the present invention, the ultraviolet absorber is a benzotriazole ultraviolet absorber.

[0017] As a preferred technical solution of the present invention, the processing aid includes carbon fiber and ferrite.

[0018] Preferably, in the processing aid, the weight ratio of carbon fiber to ferrite is 1:(1-1.8).

[0019] Preferably, the process of the aging-resistant PVC material is as follows: each raw material is put into a mixer according to weight and stirred for 12-14 minutes, and after mixing, it is added into a twin-screw extruder and extruded to obtain the material.

[0020] A second aspect of the present invention provides an application of an ageing-resistant PVC material in a charging pile cable.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] Adding dipropylheptyl phthalate and diisononyl phthalate to the PVC material system and adjusting the weight ratio to 1: (2-4) not only significantly improves the shielding effect, but also reduces the density of the material, making the material lighter, making it more convenient to use in charging pile cables, and further improves the aging resistance of the PVC material when the elongation at break of the PVC substrate is 360-400% and the tensile stress is 8.2-8.6MPa. In the processing aid, the weight ratio of carbon fiber and ferrite is 1: (1-1.8). Under the action of the PVC substrate, the mechanical properties of the tensile properties of the material are improved, making it less prone to wear and tear, and able to maintain a good appearance gloss for a long time. The PVC material obtained by the present invention can be well applied to the production of charging pile cables and has excellent adaptability. DETAILED DESCRIPTION

[0023] Example

[0024] The raw materials for preparing the composition in the embodiment are all commercially available, among which the PVC substrate is purchased from Tenol Apex, USA, model 155, elongation at break 390%, tensile stress 8.48 MPa (100% strain, 23°C), fly ash purchased from Shengyun, stabilizer purchased from Tengyue, zinc stearate, CAS No. 53306-54-0 of dipropylheptyl phthalate, CAS No. 28553-12-0 of diisononyl phthalate, CAS No. 2432-87-3 of dioctyl sebacate, pentaerythritol stearate purchased from Jinqixin, model PETS-3, epoxy triglyceride purchased from Junteng, antioxidant purchased from BASF, model 1010, benzotriazole UV absorber purchased from Rianlon / Li'anlong, model UV 234, carbon fiber purchased from Ruichuang, ferrite purchased from Zhongke Jinyan, product name is nano barium ferrite.

[0025] Example 1

[0026] This example provides an aging-resistant PVC material, and the raw materials of the aging-resistant PVC material include 96 parts by weight of PVC base material, 16 parts by weight of filler, 2.7 parts by weight of stabilizer, 12 parts of toughening agent, 0.5 parts by weight of lubricant, 10 parts by weight of plasticizer, 0.3 parts by weight of antioxidant, 0.3 parts by weight of UV absorber and 2.5 parts by weight of processing aid.

[0027] The filler is an inorganic filler, and the inorganic filler is magnesium hydroxide and fly ash. The weight ratio of magnesium hydroxide to fly ash is 1:1.

[0028] The toughening agent is dipropyl heptyl phthalate and diisononyl phthalate, and in the toughening agent, the weight ratio of dipropyl heptyl phthalate to diisononyl phthalate is 1:2.

[0029] The lubricant is pentaerythritol stearate, the plasticizer is epoxyglycerol triester, and the ultraviolet absorber is a benzotriazole ultraviolet absorber.

[0030] The processing aid comprises carbon fiber and ferrite. In the processing aid, the weight ratio of the carbon fiber to the ferrite is 1:1.5.

[0031] The process of producing the ageing-resistant PVC material is as follows: various raw materials are put into a mixer according to weight and stirred for 12 minutes, and after mixing, they are added into a twin-screw extruder and extruded to obtain the material.

[0032] Example 2

[0033] This example provides an aging-resistant PVC material. Different from Example 1, the raw materials of the aging-resistant PVC material include 94 parts by weight of PVC base material, 16 parts by weight of filler, 2.5 parts by weight of stabilizer, 11 parts of toughening agent, 0.4 parts by weight of lubricant, 8 parts by weight of plasticizer, 0.2 parts by weight of antioxidant, 0.2 parts by weight of UV absorber and 2.5 parts by weight of processing aid.

[0034] Example 3

[0035] This example provides an aging-resistant PVC material. Different from Example 1, the raw materials of the aging-resistant PVC material include 98 parts by weight of PVC base material, 16 parts by weight of filler, 4 parts by weight of stabilizer, 12 parts by weight of toughening agent, 0.55 parts by weight of lubricant, 11 parts by weight of plasticizer, 0.35 parts by weight of antioxidant, 0.3 parts by weight of UV absorber and 2.6 parts by weight of processing aid.

[0036] Example 4

[0037] This example provides an aging-resistant PVC material. The difference from Example 1 is that the toughening agent is dipropyl heptyl phthalate and diisononyl phthalate, and the weight ratio of dipropyl heptyl phthalate and diisononyl phthalate in the toughening agent is 1:1. In the processing aid, the weight ratio of carbon fiber and ferrite is 1:1.4.

[0038] Example 5

[0039] This example provides an aging-resistant PVC material. The difference from Example 1 is that the toughening agent is dipropyl heptyl phthalate and dioctyl sebacate, and in the toughening agent, the weight ratio of dipropyl heptyl phthalate to diisononyl phthalate is 1:3.

[0040] Performance Test:

[0041] 1. Electromagnetic interference test: The aging-resistant PVC material obtained in Example 1 was used as a sleeve to cover the new energy vehicle charging pile cable (sourced from Jiangsu Yancheng Langchuang Nano New Materials Co., Ltd.). During the charging of a 60kw electric vehicle by the new energy vehicle charging pile, +2kV, +4kV and +8kV air discharge processes were applied, and no abnormalities were caused on the touch screen.

[0042] 2. Tensile performance test: The aging-resistant PVC materials obtained in Examples 1-5 were subjected to a tensile performance test according to JIS K6251. The results are shown in Table 1:

[0043] Table 1

[0044] Example Elongation at break (%) Tensile strength(MPa) 1 144 39 2 142 38 3 137 35 4 123 19 5 121 17

[0045] 3. Aging resistance test: The aging-resistant PVC materials obtained in Examples 1-5 were treated at 135°C for 240 hours, and then subjected to a tensile property test again according to JIS K6251. The results are shown in Table 2:

[0046] Table 2

[0047] Example Elongation at break (%) Tensile strength(MPa) 1 140 37 2 134 34 3 131 32 4 112 11 5 103 15

[0048] 4. Resistivity test: The resistivity of the aging-resistant PVC materials obtained in Examples 1-5 at 20°C was measured according to GB / T15662-1995. The results are shown in Table 3:

[0049] Table 3

[0050] Example <![CDATA[Volume resistivity (10 14 Ωm)]]> 1 16.7 2 17.2 3 16.8 4 12.3 5 13.5

Claims

1. An aging-resistant PVC material, characterized in that: The raw materials of the aging-resistant PVC material include 94-98 parts by weight of PVC base material, 15-18 parts by weight of filler, 2.3-4.4 parts by weight of stabilizer, 11-13 parts by weight of toughening agent, 0.4-0.58 parts by weight of lubricant, 8-12 parts by weight of plasticizer, 0.2-0.4 parts by weight of antioxidant, 0.2-0.4 parts by weight of ultraviolet absorber and 2-2.8 parts by weight of processing aid; The toughening agent is dipropyl heptyl phthalate and diisononyl phthalate, and the weight ratio of dipropyl heptyl phthalate to diisononyl phthalate in the toughening agent is 1:(2-4); The processing aid includes carbon fiber and ferrite; the weight ratio of carbon fiber to ferrite is 1:(1-1.8); The plasticizer is selected from one or more of epoxy triglyceride, dioctyl phthalate, and chlorinated paraffin.

2. The aging-resistant PVC material according to claim 1, characterized in that: The PVC substrate has a breaking elongation of 360-400% and a tensile stress of 8.2-8.6 MPa.

3. The aging-resistant PVC material according to claim 2, characterized in that: The filler is an inorganic filler, and the inorganic filler is magnesium hydroxide and / or fly ash.

4. The aging-resistant PVC material according to claim 1, characterized in that: The lubricant is selected from one or more of calcium stearate, pentaerythritol stearate, polyethylene wax and stearic acid.

5. The aging-resistant PVC material according to any one of claims 1 to 4, characterized in that: The ultraviolet absorber is a benzotriazole ultraviolet absorber.

6. Application of the aging-resistant PVC material according to any one of claims 1 to 5 in charging pile cables.