A high temperature resistant cable material for new energy vehicle charging line and its preparation method and application

Abstract

The present invention discloses a high temperature resistant cable material for new energy vehicle charging line and its preparation method and application, belonging to the technical field of polymer material preparation. The cable material is made of the following raw materials in parts by weight: 70-85 epoxy resin, 30-35 ethylene-propylene rubber, 5-10 flame retardant, 1-2 antioxidant, 2-8 bismaleimide resin and 3-5 softener. The cable material prepared by the present invention has the characteristics of high temperature resistance, low temperature resistance and moisture resistance, can be used for new energy vehicle charging cables, and is halogen-free, safe and environmentally friendly, and has broad application prospects in practice. The preparation method is simple and can be mass-produced industrially.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer material preparation, and specifically relates to a high temperature resistant cable material for a new energy vehicle charging line, and a preparation method and application thereof. Background Art

[0002] At present, the exhaust gas emitted by fuel vehicles greatly pollutes the air environment. In order to reduce the pollution caused by exhaust gas emissions, the development and popularization of new energy vehicles is particularly important. The driving mode of new energy vehicles is electricity, and they need to be connected to the charging pile through cables for charging. In order to maintain the power of the car, the cable needs to pass a large flow of current during the charging process to reduce the charging time to ensure the rapid and normal operation of new energy vehicles. However, large flow currents will inevitably lead to the generation of heat energy, and the heat will cause the cable to age rapidly and damage the cable, thereby causing great safety hazards. The increase in temperature will also increase the resistance of the cable, affecting the charging efficiency and indirectly limiting the use of new energy vehicles. At present, the PVC resin used in the charging cable of new energy vehicles is the main body. The new energy vehicle cable material prepared by adding various functional additives contains halogens, which are very harmful to the environment and human body, and the maximum use temperature is 105°C. Therefore, it is urgent to prepare a halogen-free and high-temperature resistant new energy vehicle charging cable. Summary of the invention

[0003] In view of the above problems existing in the prior art, the first technical problem to be solved by the present invention is to provide a high temperature resistant cable material for new energy vehicle charging lines, which has high temperature resistance. The second technical problem to be solved by the present invention is to provide a method for preparing a high temperature resistant cable material for new energy vehicle charging lines. The method is simple, environmentally friendly, and highly safe, and a halogen-free, high temperature resistant cable material for new energy vehicle charging is prepared. The third technical problem to be solved by the present invention is to provide an application of a high temperature resistant cable material in new energy vehicle charging.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] A high-temperature resistant cable material for a new energy vehicle charging line is prepared from the following raw materials in parts by weight: 70-85 of epoxy resin, 30-35 of ethylene-propylene rubber, 5-10 of flame retardant, 1-2 of antioxidant, 2-8 of bismaleimide resin and 3-5 of softener.

[0006] Furthermore, the softener is one or more of paraffin oil, polyethylene wax and liquid polyisobutylene.

[0007] Furthermore, the softener is paraffin oil.

[0008] Furthermore, the flame retardant is one or more of aluminum hydroxide, magnesium hydroxide or zinc borate.

[0009] Furthermore, the antioxidant is phenol or phosphite.

[0010] The method for preparing the high temperature resistant cable material for the new energy vehicle charging line comprises the following steps:

[0011] 1) Weighing epoxy resin, flame retardant, antioxidant and bismaleimide resin according to proportion and mixing them thoroughly to obtain a mixture A;

[0012] 2) Weigh ethylene-propylene rubber and softener according to the proportion and mix them thoroughly to obtain mixture B;

[0013] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder for melt mixing, and then sequentially subjected to the steps of extrusion, drawing, air cooling, pelletizing and drying to obtain a high temperature resistant cable material for a new energy vehicle charging cable.

[0014] Furthermore, in step 3), the extrusion temperature of the twin-screw extruder is 200-230°C.

[0015] Furthermore, in step 3), the rotation speed of the twin-screw extruder is 200-400 rpm.

[0016] Furthermore, in step 3), the aspect ratio of the twin-screw extruder is 40:1 to 48:1.

[0017] The application of the high temperature resistant cable material in charging cables for new energy vehicles.

[0018] Beneficial effects: Compared with the prior art, the advantages of the present invention are:

[0019] (1) The cable material prepared by the present invention has excellent high temperature resistance and can be used at a temperature of up to 200°C, which is of great significance in the charging of new energy vehicles.

[0020] (2) In addition to having excellent high temperature resistance, the cable material prepared by the present invention also has low temperature resistance (-40°C) and moisture resistance, and has good use efficiency in different environments, which greatly increases the use environment range of new energy vehicles and enhances the promotion of new energy vehicles.

[0021] (3) The cable material prepared by the present invention contains no halogen elements and does not emit toxic gases during the preparation process, thus not affecting the health of workers and the safety of the environment, and is more environmentally friendly and green.

[0022] (4) The preparation method of the cable material for charging new energy vehicles of the present invention is simple and can be produced on a large scale. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with specific embodiments.

[0024] The epoxy resins used in the following examples are WSR618 (E51) and 6101 (E44);

[0025] Ethylene propylene rubber is EPDM EP J0050, EPDM 3072EPM and EPDM 5470C;

[0026] The antioxidant is phenol or phosphite. The phenol is Irganox1010 and Irgafos168, and the phosphite is CHPHOS. TM 8625 and CHPHOS TM 8503;

[0027] The CAS number of bismaleimide resin is 13676-54-5;

[0028] The softener is one or more of paraffin oil, polyethylene wax and liquid polyisobutylene. The paraffin oil is paraffin oil specially used for natural rubber. The polyethylene wax is TW-F0054H and TW-F0057. The CAS number of liquid polyisobutylene is 9003-27-4.

[0029] Example 1

[0030] 1) Weigh 70 parts of epoxy resin, 8 parts of aluminum hydroxide, 1 part of phenol (Irganox 1010) and 2 parts of bismaleimide resin and mix them in proportion to obtain a mixture A;

[0031] 2) Weigh 30 parts of ethylene propylene rubber (EPDM EP J0050) and 3 parts of paraffin oil and mix them thoroughly according to the proportion to obtain a mixture B;

[0032] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 300 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying steps to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0033] Example 1

[0034] 1) Weigh 70 parts of epoxy resin, 8 parts of aluminum hydroxide, 1 part of phenol (Irganox 1010) and 2 parts of bismaleimide resin and mix them in proportion to obtain a mixture A;

[0035] 2) Weigh 30 parts of ethylene propylene rubber (EPDM EP J0050) and 3 parts of paraffin oil and mix them thoroughly according to the proportion to obtain a mixture B;

[0036] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 300 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying steps to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0037] Example 2

[0038] 1) Weigh 70 parts of epoxy resin, 8 parts of aluminum hydroxide, 1 part of phenol (Irgafos168) and 2 parts of bismaleimide resin and mix them in proportion to obtain a mixture A;

[0039] 2) Weigh 33 parts of ethylene propylene rubber (EPDM EP J0050) and 4 parts of paraffin oil and mix them thoroughly according to the proportion to obtain a mixture B;

[0040] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 300 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying steps to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0041] Example 3

[0042] 1) Weigh 70 parts of epoxy resin, 8 parts of aluminum hydroxide, 1 part of phenol (Irgafos168) and 2 parts of bismaleimide resin and mix them in proportion to obtain a mixture A;

[0043] 2) Weigh 35 parts of ethylene propylene rubber (EPDM 3072EPM) and 5 parts of paraffin oil and mix them thoroughly according to the proportion to obtain a mixture B;

[0044] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 300 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying steps to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0045] Example 4

[0046] 1) Weigh 80 parts of epoxy resin, 8 parts of aluminum hydroxide, 1 part of phenol (Irganox 1010) and 2 parts of bismaleimide resin and mix them in proportion to obtain a mixture A;

[0047] 2) Weigh 35 parts of ethylene propylene rubber (EPDM 3072EPM) and 5 parts of polyethylene wax (TW-F0054H) and mix them thoroughly according to the proportion to obtain a mixture B;

[0048] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 300 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying steps to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0049] Example 5

[0050] 1) Weigh 85 parts of epoxy resin, 8 parts of aluminum hydroxide, 1 part of phenol (Irganox 1010) and 2 parts of bismaleimide resin and mix them in proportion to obtain a mixture A;

[0051] 2) Weigh 35 parts of ethylene propylene rubber (EPDM EP J0050) and 5 parts of paraffin oil and mix them thoroughly according to the proportion to obtain a mixture B;

[0052] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 300 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying steps to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0053] Example 6

[0054] 1) Weigh 85 parts of epoxy resin, 8 parts of aluminum hydroxide, 1 part of phenol (Irganox 1010) and 5 parts of bismaleimide resin and mix them in proportion to obtain a mixture A;

[0055] 2) Weigh 35 parts of ethylene propylene rubber (EPDM EP J0050) and 5 parts of paraffin oil and mix them thoroughly according to the proportion to obtain a mixture B;

[0056] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 300 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying steps to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0057] Example 7

[0058] 1) Weigh 85 parts of epoxy resin, 8 parts of aluminum hydroxide, 1 part of phenol (Irganox 1010) and 8 parts of bismaleimide resin and mix them in proportion to obtain a mixture A;

[0059] 2) Weigh 35 parts of ethylene propylene rubber (EPDM EP J0050) and 5 parts of paraffin oil and mix them thoroughly according to the proportion to obtain a mixture B;

[0060] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 300 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying steps to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0061] Example 8

[0062] 1) Weigh 85 parts of epoxy resin, 8 parts of magnesium hydroxide, 1 part of phenol (Irganox 1010) and 8 parts of bismaleimide resin and mix them in proportion to obtain a mixture A;

[0063] 2) Weigh 35 parts of ethylene propylene rubber (EPDM 5470C) and 5 parts of paraffin oil and mix them in proportion to obtain a mixture B;

[0064] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 300 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying steps to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0065] Example 9

[0066] 1) Weigh 85 parts of epoxy resin, 8 parts of magnesium hydroxide, and phosphites (CHPHOS TM 8625) 1 part and 8 parts of bismaleimide resin were mixed in proportion to obtain a mixture A;

[0067] 2) Weigh 35 parts of ethylene propylene rubber (EPDM 5470C) and 5 parts of liquid polyisobutylene and mix them thoroughly according to the proportion to obtain a mixture B;

[0068] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 300 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying steps to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0069] Example 10

[0070] 1) Weigh 85 parts of epoxy resin, 8 parts of magnesium hydroxide, and phosphites (CHPHOS TM 8503) 1 part and 8 parts of bismaleimide resin are mixed in proportion to obtain a mixture A;

[0071] 2) Weigh 35 parts of ethylene propylene rubber (EPDM 3072EPM) and 5 parts of polyethylene wax (TW-F0057) and mix them thoroughly according to the proportion to obtain a mixture B;

[0072] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 400 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying steps to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0073] Embodiment 11

[0074] 1) Weigh 85 parts of epoxy resin, 8 parts of magnesium hydroxide, and phosphites (CHPHOS TM 8625) 1 part and 8 parts of bismaleimide resin were mixed in proportion to obtain a mixture A;

[0075] 2) Weigh 35 parts of ethylene propylene rubber (EPDM EP J0050) and 5 parts of polyethylene wax (TW-F0054H) and mix them thoroughly according to the proportion to obtain a mixture B;

[0076] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 400 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying steps to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0077] Example 12

[0078] 1) Weigh 85 parts of epoxy resin, 8 parts of magnesium hydroxide, and phosphites (CHPHOS TM 8625) 1 part and 8 parts of bismaleimide resin were mixed in proportion to obtain a mixture A;

[0079] 2) Weigh 35 parts of ethylene propylene rubber (EPDM 5470C) and 5 parts of liquid polyisobutylene and mix them thoroughly according to the proportion to obtain a mixture B;

[0080] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 400 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying steps to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0081] Embodiment 13

[0082] The cable materials prepared in Examples 1 to 12 were subjected to performance testing, and the testing criteria were as follows: density was GB1033; hardness was GB / T2411; original tensile strength was GB / T2951.11; the change rate of tensile strength after hot air aging was GB / t2951.12; thermal deformation indentation depth was GB / T2951.31; thermal shock test was GB / t2951.31; thermal stability test time was GB / T2951.32; low-temperature brittleness temperature was GB / T5470; the change rate of tensile strength in acid and alkali resistance test was GB / T2951.21; flame retardancy was UL1581; and moisture resistance was JB / T8138.6-1995. The test results are shown in Table 1.

[0083] Table 1 Test results of Examples 1 to 12

[0084]

[0085]

[0086] In Table 1 above, the original tensile strength index value is 10Mpa; the tensile strength change rate index value after hot air aging is ±25; the thermal deformation indentation depth index value is 50; the temperature used for the thermal stability test of the present invention is 250°C, and the index value is 200°C; the tensile strength change rate index value of the acid and alkali resistance test is ±25; the flame retardant performance index is VW-1; the rated voltage for testing moisture resistance in this application is 30kv, and the spray injection rate is 0.8±L / m·h. The rated voltage for standard moisture resistance is 24kv, and the spray injection rate is 0.3±L / m·h.

[0087] It can be seen from Table 1 above that the cable material prepared by the present invention has excellent high and low temperature resistance and moisture resistance, and the use temperature can reach 200-250°C.

[0088] Comparative Example 1

[0089] 1) Weigh 70 parts of epoxy resin, 8 parts of aluminum hydroxide and 1 part of phenol (Irganox 1010) and mix them thoroughly according to the proportion to obtain a mixture A;

[0090] 2) Weigh 30 parts of ethylene propylene rubber (EPDM 5470C) and 3 parts of paraffin oil and mix them thoroughly according to the proportion to obtain a mixture B;

[0091] 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 300 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying steps to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0092] Comparative Example 2

[0093] 1) Weigh 70 parts of epoxy resin, 8 parts of aluminum hydroxide, 1 part of phenol (Irganox1010), 3 parts of paraffin oil and 2 parts of bismaleimide resin according to the proportion and mix them thoroughly to obtain a mixture;

[0094] 2) The mixture obtained in step 1) is added to a twin-screw extruder with a length-to-diameter ratio of 40:1 to 48:1, a rotation speed of 200 to 300 rpm, and an extrusion temperature of 200 to 230° C. for melt mixing, and then sequentially subjected to extrusion, drawing, air cooling, pelletizing and drying processes to obtain a high-temperature resistant cable material for a new energy vehicle charging cable.

[0095] The cable materials prepared in Comparative Examples 1 and 2 were tested with the same methods and indicators as the cable materials prepared in Examples 1 to 12. The results are shown in Table 2.

[0096] Table 2 Test results of comparative examples 1 and 2

[0097]

[0098] It can be seen from Table 2 above that the maleimide resin in the components of the present invention has a greater influence on the moisture resistance of the cable material, and the ethylene-propylene rubber has a greater influence on the high temperature resistance of the cable material. It can be seen from Examples 1 to 12 that the components in different component proportions have different effects on the high temperature resistance and moisture resistance of the cable material.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high temperature resistant cable material for new energy vehicle charging line, characterized in that: The invention is prepared from the following raw materials in parts by weight: 70-85 parts of epoxy resin, 30-35 parts of ethylene-propylene rubber, 5-10 parts of flame retardant, 1-2 parts of antioxidant, 2-8 parts of bismaleimide resin and 3-5 parts of softener; wherein the antioxidant is phenol or phosphite; The cable material comprises the following preparation steps: 1) Weigh epoxy resin, flame retardant, antioxidant and bismaleimide resin according to proportion and mix them thoroughly to obtain mixture A; 2) Weigh EPDM rubber and softener according to the proportion and mix them thoroughly to obtain mixture B; 3) The mixture A obtained in step 1) and the mixture B obtained in step 2) are added together into a twin-screw extruder for melt mixing, and then subjected to the steps of extrusion, drawing, air cooling, pelletizing and drying in sequence to obtain a high temperature resistant cable material for a new energy vehicle charging cable.

2. The high temperature resistant cable material for the new energy vehicle charging line according to claim 1, characterized in that: The softener is one or more of paraffin oil, polyethylene wax and liquid polyisobutylene.

3. The high temperature resistant cable material for the new energy vehicle charging line according to claim 2, characterized in that: The softener is paraffin oil.

4. The high temperature resistant cable material for the new energy vehicle charging line according to claim 1, characterized in that: The flame retardant is one or more of aluminum hydroxide, magnesium hydroxide or zinc borate.

5. The high temperature resistant cable material for the new energy vehicle charging line according to claim 1, characterized in that: In step 3), the extrusion temperature of the twin-screw extruder is 200-230°C.

6. The high temperature resistant cable material for the new energy vehicle charging line according to claim 1, characterized in that: In step 3), the rotation speed of the twin-screw extruder is 200-400 rpm.

7. The high temperature resistant cable material for the new energy vehicle charging line according to claim 1, characterized in that: In step 3), the aspect ratio of the twin-screw extruder is 40:1-48:

1.

8. Use of the high temperature resistant cable material according to any one of claims 1 to 7 in the preparation of charging cables for new energy vehicles.

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