High-strength cold hardiness cable sheath rubber and technique of preparing the same thereof

A cable sheath rubber and preparation technology, which is applied in the direction of insulating cables, cables, circuits, etc., can solve problems such as not being able to meet the requirements of use, and achieve the effect of high mechanical properties

Active Publication Date: 2008-05-07
SHANGHAI MINING CABLE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of sheath material can no longer meet the requirements of cold-resistant cables in open-pit mines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The composition and ratio of the high-strength cold-resistant cable sheath rubber provided in this example are: 19% neoprene rubber, 14% chlorinated polyethylene resin, 12% masticated natural raw rubber, and dioctyl sebacate plasticized Agent 3.2%, active magnesium oxide 1.8%, substituted diphenylamine anti-aging agent 1.4%, additive flame retardant 6.8%, zinc oxide 2.0%, tetramethylthiuram disulfide 0.36%, dibenzothiazole disulfide 0.30 %, 2-thiol imidazoline 0.34%, carbon black 7.2%, silicon dioxide 12%, wollastonite powder 10%, kaolin 6%, stearic acid 1.4%, paraffin 2.2%.

[0026] The preparation technology of described high-strength cold-resistant cable sheath rubber comprises the following steps:

[0027] A. Mixing

[0028] 1) Add natural raw rubber and 0.1 to 0.2% of the weight of natural raw rubber o-hydroxythiobenzoic acid in the internal mixer, and mix for 5 to 15 minutes to obtain plasticized natural raw rubber;

[0029] 2) Add chlorinated polyethylene resin...

Embodiment 2

[0042] The difference from Example 1 is that the composition and ratio of the high-strength cold-resistant cable sheath rubber provided in this example are: 20.5% neoprene rubber, 8.2% chlorinated polyethylene resin, and 12.3% masticated natural raw rubber. %, dioctyl sebacate plasticizer 2.1%, activated magnesium oxide 1.8%, substituted diphenylamine anti-aging agent 1.2%, additive flame retardant 6.2%, zinc oxide 2.0%, tetramethylthiuram disulfide 0.34%, dibenzothiazole disulfide 0.29%, 2-thiol imidazoline 0.37%, carbon black 6.2%, silicon dioxide 13.1%, wollastonite powder 6.2%, kaolin 16%, stearic acid 1.2%, paraffin 2.0%.

Embodiment 3

[0044] The difference from Example 1 is that the composition and ratio of the high-strength cold-resistant cable sheath rubber provided in this example are: 17% neoprene rubber, 5% chlorinated polyethylene resin, 21% masticated natural raw rubber %, dioctyl sebacate plasticizer 3%, activated magnesium oxide 1.8%, substituted diphenylamine antioxidant 1.3%, additive flame retardant 6.36%, zinc oxide 2.0%, tetramethylthiuram disulfide 0.35%, dibenzothiazole disulfide 0.34%, 2-thiol imidazoline 0.35%, carbon black 7%, silicon dioxide 14%, wollastonite powder 10%, kaolin 7%, stearic acid 1.3%, paraffin 2.2%.

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Abstract

The invention provides a high strength and non freezing cable cover rubber and a preparation process thereof, aiming at the disadvantages of the prior art and the market requirement. The M300 stress at elongation of the high strength and non freezing cable cover rubber is 6.5 to 7.0N / mm<2>, the breaking elongation is 400 to 500 percent, the tensile strength is 12.5 to 13.8 N per mm<2>, permanent set after breaking is 30 to 50 percent, the T-shaped tearing strength is 6.5 to 7.5 N / mm, and after aging by the heat air of 75 DEG C*240 hours, the tensile strength retention rate is not less than 90 percent, and the breaking elongation retention rate is not less than 80 percent. The non freezing property for the finished product cable prepared by adopting the cover rubber of the invention can pass the extremely low temperature impact and extremely low temperature bending test regulated in the UL44 standard, and the flame retardant property can pass a bundling burning test. Compared with the prior art, the cover rubber of the invention not only has higher mechanical property than the common rubber, but also has the advantages of low temperature and medium prevention. So the service life of the cable is prolonged under the condition of low temperature and having oil.

Description

technical field [0001] The invention relates to a cable sheath rubber and its preparation process, in particular to a high-strength cold-resistant cable sheath rubber and its preparation process. Background technique [0002] Elasticity is one of the most valuable properties of rubber as an engineering material. At very low temperature, due to the freezing of rubber molecular chains, it loses the unique elasticity of rubber, becomes hard and brittle, and loses its performance. When the sheath rubber of the existing ordinary cable is used under the condition of -60°C, it cannot withstand repeated bending and cracks. This kind of sheath material can no longer meet the requirements of cold-resistant cables in open-pit mines. Contents of the invention [0003] Aiming at the deficiencies of the above-mentioned prior art and market demand, the present invention provides a high-strength cold-resistant cable sheath rubber and a preparation process thereof. [0004] The high-str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L11/00C08K5/47C08J3/24H01B7/28C08L23/28C08L7/00C08L91/06C08K5/10C08K5/3445C08K3/00
Inventor 金忠陈天荣
Owner SHANGHAI MINING CABLE FACTORY
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