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Low-cost insulating rubber for rubber insulated flexible wires and flexible cables

A rubber insulation and low-cost technology, which is applied in the field of low-cost insulating rubber for rubber insulated flexible wires and flexible cables, can solve the problems of lack of oil resistance, high cost of ethylene-propylene rubber materials, and formulas that cannot meet the general oil resistance requirements. Achieve the effect of cost reduction, material cost reduction and good overall performance

Inactive Publication Date: 2012-12-19
FAR EAST CABLE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chinese patent ZL200610161495.1 discloses a kind of "Ethylene Propylene Rubber for Wire and Cable", in which the rubber formula uses pure ethylene propylene rubber as the main rubber material, resulting in a high material cost for this formula of ethylene propylene rubber
Insulating rubber generally has no oil resistance requirements, and EPDM does not have oil resistance due to molecular structure characteristics; CPE has oil resistance due to molecular structure characteristics; when EPDM and CPE are used in binary form, in order to meet general oil resistance requirements, EPDM and CPE must be used together. The sharing ratio of CPE is very sensitive, EPDM cannot exceed 25 parts, and CPE cannot be less than 75 parts; and the formula of this invention cannot meet the requirements of general oil resistance performance.

Method used

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  • Low-cost insulating rubber for rubber insulated flexible wires and flexible cables
  • Low-cost insulating rubber for rubber insulated flexible wires and flexible cables
  • Low-cost insulating rubber for rubber insulated flexible wires and flexible cables

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The composition of the low-cost insulating rubber used for the rubber insulated flexible wire and flexible cable of the present embodiment, the proportioning number and the model are shown in Table 1:

[0035] Table I

[0036]

[0037]

[0038] In this example:

[0039] Properties of mixed film:

[0040] Mooney viscosity M(1+4) at 100°C is: 62.0Mv

[0041] The maximum torque MH at 170℃*15min on the rheometer is: 3.60N.m

[0042] The process scorch time t10 at 170℃*15min on the sulfur rheometer is: 0.95min

[0043] The process positive vulcanization time t90 at 170℃*15min on the rheometer is: 8.60min

[0044] Volume resistivity at 20°C: 5.1*1013Ω.cm

[0045] Tensile strength: 7.2N / mm 2

[0046] Elongation: 430%

[0047] Specific gravity: 1.58g / cm 3

[0048] After weighing according to Table 1, perform mastication, kneading, tableting, extrusion molding, and steam vulcanization to obtain the finished product, and its properties are shown in Table 2:

[00...

Embodiment 2

[0052] The composition of the low-cost insulating rubber used for the rubber insulated flexible wire and flexible cable of the present embodiment, the proportioning number and the model are shown in Table 3:

[0053] Table three

[0054]

[0055] In this example:

[0056] Properties of mixed film:

[0057] Mooney viscosity M(1+4) at 100°C is: 60.0Mv

[0058] The maximum torque MH at 170℃*15min on the rheometer is: 3.2N.m

[0059] The process scorch time t10 of 170℃*15min on the rheometer is: 0.88min

[0060] The process positive vulcanization time t90 at 170℃*15min on the rheometer is: 8.25min

[0061] Volume resistivity at 20°C: 1.5*10 14 Ω.cm

[0062] Tensile strength: 6.8N / mm 2

[0063] Elongation: 450%

[0064] Specific gravity: 1.56g / cm 3

[0065] After weighing according to Table 3, carry out mastication, kneading, tableting, extrusion molding, and steam vulcanization to obtain the finished product, and its properties are shown in Table 4:

[0066] Table fou...

Embodiment 3

[0069] The composition of the low-cost insulating rubber used for the rubber insulated flexible wire and flexible cable of the present embodiment, the proportioning number and the model are shown in Table 5:

[0070] Table five

[0071]

[0072] In this example:

[0073] Properties of mixed film:

[0074] Mooney viscosity M(1+4) at 100°C is: 64Mv

[0075] The maximum torque MH at 170℃*15min on the rheometer is: 3.7N.m

[0076] The process scorch time t10 at 170℃*15min on the sulfur rheometer is: 0.9min

[0077] The process positive vulcanization time t90 at 170℃*15min on the rheometer is: 9.0min

[0078] Volume resistivity at 20°C: 1.2*10 13 Ω.cm

[0079] Tensile strength: 7.5N / mm 2

[0080] Elongation: 410%

[0081] Specific gravity: 1.60g / cm 3

[0082] After weighing according to Table 5, carry out mastication, kneading, tableting, extrusion molding, and steam vulcanization to obtain the finished product, and its properties are shown in Table 6:

[0083] Table...

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Abstract

The invention relates to a low-cost insulating rubber for rubber insulated flexible wires and flexible cables. The low-cost insulating rubber provided by the invention comprises the following ingredients of: by weight, 60-40 parts of terpolymer EP rubber, 40-60 parts of chlorinated polyethylene, 10-15 parts of an activator, 2-4 parts of a stabilizing agent, 2-4 parts of an antioxidant, 8-15 parts of a plasticizer, 10-20 parts of a strengthening agent, 115-135 parts of a filler, 1-3 parts of a lubrication aid, 1-3 parts of a release agent, and 10-15 parts of a composite vulcanizing agent, the rubber content of the insulating rubber is 33-37% and the rubber content is (the weight of terpolymer EP rubber + the weight of chlorinated polyethylene) / gross weight * 100%. By the combined application of terpolymer EP rubber and chlorinated polyethylene, the rubber cost is reduced, and cost performance of IE4 insulating rubber is raised. The low-cost IE4 insulating rubber can satisfy performance requirements of standards of GB / T5013-2008 ''Rubber insulated cables with rated voltage of 450 / 750 V and below'' and JB8735-1998 ''Rubber insulated flexible wires and flexible cables with rated voltage of 450 / 750 V and below''.

Description

technical field [0001] The invention relates to an insulating rubber, in particular to a low-cost insulating rubber for rubber insulated flexible wires and flexible cables. Background technique [0002] The new version of "Rubber Insulated Cables with Rated Voltage 450 / 750V and Below" GB / T5013-2008 replaced the old version of GB / T5013-1997, and "common rubber compound insulated cables-IE1 type" was canceled in the new version of GB / T5013-2008 Added "Ethylene-propylene rubber mixture or its equivalent material insulated cables - IE4 type", added the ozone resistance test of IE4 type insulating rubber, increased the heat aging temperature of IE4 type insulating rubber, from IE1 type 80 ℃ 7 days heat aging Increase to IE4 type 100°C for 7 days heat aging. [0003] IE1 type insulating rubber mainly uses natural rubber of ordinary rubber as the rubber material. Natural rubber has high elasticity at room temperature, slightly plastic, very good mechanical strength, low hysteresis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/28C08K13/02H01B7/04H01B3/28H01B3/44
Inventor 田维生徐静刘华军
Owner FAR EAST CABLE