CN104177676A - Rubber for cable insulation outer walls and production method thereof - Google Patents

Abstract

The invention discloses a rubber for cable insulation outer walls, which is prepared from the following raw materials in percentage by weight: 0.1-3% of sodium stearate, 1-3% of antioxidant, 3-5% of titanium dioxide, 3-5% of zinc oxide, 0.1-1% of antistatic agent, 3-15% of calcium carbonate powder, 5-15% of insulating ceramic particle, 2-5% of accelerator, 5-10% of asbestos fiber, 3-10% of carbon black, 1-10% of graphite fiber, 0.01-3% of odorizer and the balance of chloroprene rubber. The production method comprises the following steps: pulverizing, mixing, compounding, cooling and pulverizing. The method effectively enhances the insulating property of the rubber, greatly improves the impact resistance, antistatic property, aging resistance and toughness of the rubber product, increases the thermal decomposition temperature of the rubber, can effectively lower the hidden danger of fire hazards on the premise of enhancing the electric insulation performance and preventing the leakage accidents, and can effectively prevent the fire behavior from overspreading, thereby achieving the effect of lowering the damage of the fire hazards.

Description

Rubber and production method thereof for a kind of cable insulation outer wall

Technical field

The present invention relates to rubber and production method for a kind of cable insulation outer wall, belong to novel electric power insulating material technical field.

Background technology

Cable outer wall insulating material is the important leverage of guaranteeing cable insulation grade, it is the whether up-to-standard important indicator of cable product, current high-tension cable outer wall insulating material mainly contains rubber or plastic material is main, wherein elastomeric material because of self snappiness good, the feature range of application such as insulate reliable is very extensive, but current used cable outer wall electro-insulating rubber material often only possess have good insulating property and snappiness better, and shock resistance, anti-oxidant, antistatic and high temperature resistant property is relatively poor, easily because of external force generation breakage or Yin Gaowen generation catching fire phenomenon, and cable in use, because of short circuit, the reasons such as loose contact easily produce localized hyperthermia's phenomenon even on fire, therefore, presently used cable outer wall electro-insulating rubber material in use exists very big potential safety hazard, therefore need to develop a kind of new type rubber material to meet the needs of use.

Summary of the invention

The object of the invention is just to overcome above-mentioned deficiency, and rubber and production method for a kind of cable insulation outer wall is provided.

For achieving the above object, the present invention is achieved through the following technical solutions:

A kind of cable insulation outer wall rubber, raw material by following weight percent is made: sodium stearate: 0.1%-3%, antioxidant: 1%-3%, and titanium dioxide: 3%-5%, zinc oxide: 3%-5%, static inhibitor: 0.1%-1%, Paris white: 3%-15%, insulating ceramic particle: 5%-15%, promotor: 2%-5%, fibrous magnesium silicate: 5%-10%, carbon black: 3%-10%, graphite fibre: 1%-10%, odorant: 0.01%-3%, surplus are chloroprene rubber.

Paris white and its particle diameter of insulating ceramic particle are 0.05-0.5 millimeter.

The production method of rubber for high-voltage cable insulating outer wall, comprises the steps:

The first step: pulverize, chloroprene rubber raw material is pulverized, the rubber grain diameter after pulverizing is not more than 0.5 millimeter;

Second step: batch mixing adds in proportion sodium stearate, antioxidant, titanium dioxide, zinc oxide, static inhibitor, Paris white, insulating ceramic particle, fibrous magnesium silicate, carbon black and graphite fibre, and stirs in the chloroprene rubber of molten state;

The 3rd step: mixing, the mixture configuring is heated to molten state and keeps 10-30 minute, also by 50-200 revs/min of speed, stir during this time, stir simultaneously, separately with 300W-1000W power ultrasonic, carry out ultrasonic wave diffusion, in this, separately in molten state mixture, add promotor and odorant simultaneously;

The 4th step: cooling, the mixture of molten state is proceeded in cooling die, naturally cool to room temperature, make sheet rubber;

The 5th step: pulverize, the film preparing is pulverized, the rubber grain diameter after pulverizing is 1 millimeter-10 millimeters.

When the present invention has effectively improved rubber self insulating property, shock resistance, static resistance, resistance to deterioration, the toughness of rubber item have also significantly been improved, and improved its heat decomposition temperature, improving electrical insulation properties, when preventing that electric leakage accident from occurring, also can effectively reduce fire generation hidden danger, and can effectively stop fire spreading, thereby reach the effect that reduces damage by fire.

Embodiment

By preferred embodiment, the present invention is described in further detail below, but protection scope of the present invention is not limited to this.

Embodiment 1: a kind of cable insulation outer wall rubber, raw material by following weight percent is made: sodium stearate: 1%, antioxidant: 2%, and titanium dioxide: 3%, zinc oxide: 3%, static inhibitor: 1%, diameter is 0.5 millimeter of Paris white: 15%, diameter is 0.3 millimeter of insulating ceramic particle: 15%, promotor: 3%, fibrous magnesium silicate: 10%, carbon black: 10%, graphite fibre: 5%, odorant: 1%, surplus is chloroprene rubber.

Its production method, comprises the steps:

The first step: pulverize, chloroprene rubber raw material is pulverized, the rubber grain diameter after pulverizing is not more than 0.5 millimeter;

Second step: batch mixing adds in proportion sodium stearate, antioxidant, titanium dioxide, zinc oxide, static inhibitor, Paris white, insulating ceramic particle, fibrous magnesium silicate, carbon black and graphite fibre, and stirs in the chloroprene rubber of molten state;

The 3rd step: mixing, the mixture configuring is heated to molten state and is kept 10 minutes, during and by 100 revs/min of speed, stir, stir simultaneously, separately with 600W power ultrasonic, carry out ultrasonic wave diffusion, in this, separately in molten state mixture, add promotor and odorant simultaneously;

The 4th step: cooling, the mixture of molten state is proceeded in cooling die, naturally cool to room temperature, make sheet rubber;

The 5th step: pulverize, the film preparing is pulverized, the rubber grain diameter after pulverizing is 3 millimeters.

Embodiment 2: a kind of cable insulation outer wall rubber, raw material by following weight percent is made: sodium stearate: 0.5%, antioxidant: 1%, and titanium dioxide: 5%, zinc oxide: 4%, static inhibitor: 0.5%, diameter is 0.1 millimeter of Paris white: 15%, diameter is 0.1 millimeter of insulating ceramic particle: 10%, promotor: 5%, fibrous magnesium silicate: 10%, carbon black: 8%, graphite fibre: 10%, odorant: 2%, surplus is chloroprene rubber.

Its production method, comprises the steps:

The first step: pulverize, chloroprene rubber raw material is pulverized, the rubber grain diameter after pulverizing is not more than 0.5 millimeter;

Second step: batch mixing adds in proportion sodium stearate, antioxidant, titanium dioxide, zinc oxide, static inhibitor, Paris white, insulating ceramic particle, fibrous magnesium silicate, carbon black and graphite fibre, and stirs in the chloroprene rubber of molten state;

The 3rd step: mixing, the mixture configuring is heated to molten state and is kept 20 minutes, during and by 70 revs/min of speed, stir, stir simultaneously, separately with 500W power ultrasonic, carry out ultrasonic wave diffusion, in this, separately in molten state mixture, add promotor and odorant simultaneously;

The 4th step: cooling, the mixture of molten state is proceeded in cooling die, naturally cool to room temperature, make sheet rubber;

The 5th step: pulverize, the film preparing is pulverized, the rubber grain diameter after pulverizing is 5 millimeters.

Claims (3)

1. a cable insulation outer wall rubber, it is characterized in that: described high-voltage cable insulating outer wall is made by the raw material of following weight percent with rubber: sodium stearate: 0.1%-3%, antioxidant: 1%-3%, titanium dioxide: 3%-5%, zinc oxide: 3%-5%, static inhibitor: 0.1%-1%, Paris white: 3%-15%, insulating ceramic particle: 5%-15%, promotor: 2%-5%, fibrous magnesium silicate: 5%-10%, carbon black: 3%-10%, graphite fibre: 1%-10%, odorant: 0.01%-3%, surplus are chloroprene rubber.

2. a kind of cable insulation outer wall rubber according to claim 1, is characterized in that: described Paris white and its particle diameter of insulating ceramic particle are 0.05-0.5 millimeter.

3. a production method for rubber for cable insulation outer wall, is characterized in that: described high-voltage cable insulating outer wall comprises the steps: by the production method of rubber

The first step: pulverize, chloroprene rubber raw material is pulverized, the rubber grain diameter after pulverizing is not more than 0.5 millimeter;

Second step: batch mixing adds in proportion sodium stearate, antioxidant, titanium dioxide, zinc oxide, static inhibitor, Paris white, insulating ceramic particle, fibrous magnesium silicate, carbon black and graphite fibre, and stirs in the chloroprene rubber of molten state;

The 3rd step: mixing, the mixture configuring is heated to molten state and keeps 10-30 minute, also by 50-200 revs/min of speed, stir during this time, stir simultaneously, separately with 300W-1000W power ultrasonic, carry out ultrasonic wave diffusion, in this, separately in molten state mixture, add promotor and odorant simultaneously;

The 4th step: cooling, the mixture of molten state is proceeded in cooling die, naturally cool to room temperature, make sheet rubber;

The 5th step: pulverize, the film preparing is pulverized, the rubber grain diameter after pulverizing is 1 millimeter-10 millimeters.