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CPE and NR co-used sheath rubber for rubber sheathed flexible cables

A technology for sheathing rubber and flexible cables, which is applied in the direction of insulated cables, cables, circuits, etc. It can solve the problems of low steam pressure, large difference between day and night, and can not normally produce rubber-sheathed flexible cables, etc., to enhance elasticity and improve extrusion The effect of process performance

Active Publication Date: 2014-12-10
FAR EAST CABLE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The commonly used vulcanizing agent for CPE rubber is organic peroxide DCP, whose 1-minute half-life temperature is 171°C. At 0.60-0.80MPa, the steam temperature is about 170°C. At this time, the CPE sheath rubber has just started to vulcanize and cannot be produced normally. Rubber-sheathed flexible cable with CPE sheath
[0005] Nowadays, under the general situation of low carbon, environmental protection, green and energy saving, the access to the production boilers of rubber sheathed cable factories is strictly controlled by the government departments. The government departments vigorously promote the utilization of steam from thermal power plants in cities, but the steam pressure stability of thermal power plants Insufficient, large difference between day and night, low steam pressure, generally 0.60~0.80MPa, how to find a new type of vulcanizing agent to continuously vulcanize rubber sheath, flexible cable sheath rubber under the low steam pressure steam condition of thermal power plant is the development of this patent formula Purpose

Method used

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  • CPE and NR co-used sheath rubber for rubber sheathed flexible cables
  • CPE and NR co-used sheath rubber for rubber sheathed flexible cables
  • CPE and NR co-used sheath rubber for rubber sheathed flexible cables

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The composition, ratio and model of the rubber sheath flexible cable with DP275B as the vulcanizing agent in combination with CPE and NR are shown in Table 1:

[0043] Table I

[0044]

[0045]

[0046] In this example:

[0047] Properties of mixed film:

[0048] Mooney viscosity M(1+4) at 100°C is: 82.0Mv

[0049] The maximum torque MH at 150℃*15min on the rheometer is: 2.80N.m

[0050] The process scorch time t10 at 150℃*15min on the rheometer is: 0.97min

[0051] The process positive vulcanization time t90 at 150℃*15min on the rheometer is: 7.50min

[0052] Tensile strength: 13.2N / mm 2

[0053] Elongation: 450%

[0054] Specific gravity: 1.63g / cm 3

[0055] After weighing according to Table 1, carry out mastication, kneading, tableting, extrusion molding, steam pressure (0.60-0.80MPa) vulcanization to obtain the finished product, and its properties are shown in Table 2:

[0056] Table II

[0057]

Embodiment 2

[0059] The combination of CPE and NR sheath rubber for rubber sheath flexible cables using DP275B as the vulcanizing agent in this embodiment, the composition, proportions and models are shown in Table 3:

[0060] Table three

[0061]

[0062]

[0063] In this example:

[0064] Properties of mixed film:

[0065] Mooney viscosity M(1+4) at 100°C is: 80.0Mv

[0066] The maximum torque MH at 150℃*15min on the rheometer is: 3.0N.m

[0067] The process scorch time t10 at 150℃*15min on the rheometer is: 0.90min

[0068] The process positive vulcanization time t90 at 150℃*15min on the rheometer is: 6.80min

[0069] Tensile strength: 13.3N / mm 2

[0070] Elongation: 420%

[0071] Specific gravity: 1.64g / cm 3

[0072] After weighing according to Table 3, carry out mastication, kneading, sheeting, extrusion molding, steam pressure (0.60-0.80MPa) vulcanization to obtain the finished product, and its properties are shown in Table 4:

[0073] Table four

[0074]

[0075] ...

Embodiment 3

[0077] The combination of CPE and NR sheath rubber for the rubber sheath flexible cable using DP275B as the vulcanizing agent in this embodiment, the proportion and the model are shown in Table 5:

[0078] Table five

[0079]

[0080] In this example:

[0081] Properties of mixed film:

[0082] Mooney viscosity M(1+4) at 100°C is: 75Mv

[0083] The maximum torque MH at 150℃*15min on the rheometer is: 2.6N.m

[0084] The process scorch time t10 at 150℃*15min on the rheometer is: 0.90min

[0085] The process positive vulcanization time t90 at 150℃*15min on the rheometer is: 7.2min

[0086] Tensile strength: 12.2N / mm 2

[0087] Elongation: 410%

[0088] Specific gravity: 1.66g / cm 3

[0089] After weighing according to Table 5, carry out mastication, kneading, tableting, extrusion molding, steam pressure (0.60-0.80MPa) vulcanization to obtain the finished product, and its properties are shown in Table 6:

[0090] Table six

[0091]

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Abstract

The invention relates to a CPE (chlorinated polyethylene) and NR (natural rubber) co-used sheath rubber for rubber sheathed flexible cables. The sheath rubber provided in the invention comprises the following components by mass: 95-100 parts of chlorinated polyethylene; 0-5 parts of natural rubber; 10-15 parts of an active agent; 5-10 parts of a flame retardant; 50-60 parts of a plasticizer; 40 parts of a reinforcing agent; 60-80 parts of a filling agent; 0-3 parts of a lubricating assistant; 4-5 parts of a vulcanizing agent; and 1.5-2.5 parts of a vulcanizing assistant. The sheath rubber has a rubber content of 32-36%. The sheath rubber can satisfy the performance requirements of SE4 rubber in standards GB / T 5013-2008 ''rubber insulated cables with a rated voltage of 450 / 750V and below'' and JB8735-1998 ''rubber insulated flexible cords and flexible cables with a rated voltage of 450 / 750V and below''.

Description

technical field [0001] The invention relates to a sheath rubber, in particular to a sheath rubber combined with CPE and NR for rubber sheath flexible cables. Background technique [0002] Chlorinated polyethylene (CPE) is a polymer material obtained from high-density polyethylene (HDPE) through a chlorination substitution reaction. It is a saturated polymer material with excellent weather resistance, ozone resistance, chemical resistance and aging resistance. , has good oil resistance, flame retardancy, coloring performance and toughness, has good compatibility with other polymer materials, and has a high decomposition temperature; in the rubber industry, CPE can be used as a high-performance, high-quality special rubber, It can also be blended with ethylene-propylene rubber (EPR), natural rubber (NR), nitrile rubber (NBR), chlorosulfonated polyethylene (CSM) and other rubbers; rubber-type CPE is a kind of comprehensive performance, heat-resistant Oxygen ozone aging, specia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/28C08L7/00C08K13/02C08K5/14H01B3/44H01B7/295
Inventor 田维生
Owner FAR EAST CABLE
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