CN104893151A - Nitrile-butadiene rubber modified polyvinyl chloride sheath material for communication cables and preparation method thereof - Google Patents

Abstract

The invention relates to a nitrile-butadiene rubber modified polyvinyl chloride sheath material for communication cables, which is prepared from the following raw materials in parts by weight: 65-70 parts of polyvinyl chloride, 20-25 parts of nitrile-butadiene rubber, 0.3-0.5 part of soft microcrystalline wax, 4-4.5 parts of high-molecular-weight polyisobutylene, 2.5-3 parts of triallyl isocyanurate, 0.3-0.6 part of dicumyl peroxide, 0.3-0.5 part of polyisovinyl succimide and 3-4 parts of nano boron fiber. The polyvinyl chloride and nitrile-butadiene rubber are subjected to secondary crosslinking compounding without vulcanization, thereby greatly simplifying the tool set equipment and technique, enhancing the efficiency and lowering the cost; and thus, the sheath material has high strength and favorable oil resistance, has better softness and elasticity than the single use of polyvinyl chloride, and is convenient to install and use. The high-molecular-weight polyisobutylene and nano boron fiber are utilized to enhance the tensile strength, air tightness and moisture resistance of the sheath material.

Description

A kind of communication cable acrylonitrile butadiene rubber modified pvc sheathing compound and preparation method thereof

Technical field

The present invention relates to cable jacket material field, particularly relate to a kind of communication cable acrylonitrile butadiene rubber modified pvc sheathing compound and preparation method thereof.

Background technology

Rubbercable is soft with it, there is elasticity, rub resistance and in being widely used in, among the electric power circuit of the frequent movement of the need of low pressure, such as shipboard cable, subway cable, mine electric cable, welding machine cable, studio cable etc. plastic cable is then superior with its electric property, physical strength is high and be widely used in middle high-pressure, among the electric power circuit fixedly laid, in each comfortable each department of national economy, play extremely important effect.In the middle of plastic cable, although cross-inked polyethylene power cable obtains significant progress in recent years, but polyvinyl chloride insulation, polyvinyl chloride boot power cable are still playing an important role, especially in the middle of low-voltage circuit, polyvinyl chloride (PVC) electric wire, cable are still in occupation of dominant position. with regard to production technique, rubbercable and twisted polyethylene cable all more complicated, all need larger facility investment.Comparatively speaking, the production technique of polyvinyl chloride cable will be simply too much, and because it is without the need to sulfuration, facility investment is just much smaller, and production cost is just corresponding much lower.

In addition, the relative rubbercable of polyvinyl chloride cable, CABLE MATERIALS used can industrialized mass production, and rubber material is quite different, it can only be that cable producer is self-produced personal, and due to rubber material variety of raw material many, although also make troubles to production. polyvinyl chloride cable has unique advantage on producing, but with regard to purposes, it still cannot substitute rubbercable, reason is just the flexibility of polyvinyl chloride cable, elasticity cannot be compared with rubbercable.

According to the principle of rubber and plastic compound, " research of polyvinyl chloride-paracril compound elastomer cable material " one literary composition uses polyvinyl chloride and paracril to carry out compound, without the need to sulfuration, obtains elasticity, flexibility, CABLE MATERIALS that oil-proofness is good.But this matrix material just carries out simple compound, the performances such as tensile strength, resistance to air loss, moistureproofness, ageing resistance, wear resistance not, should can not meet the requirement of modern industry to communication cable, need to improve.

Summary of the invention

The object of the present invention is to provide the acrylonitrile butadiene rubber modified pvc sheathing compound of a kind of communication cable, this sheath material intensity is high, and oil-proofness is good, use polyvinyl chloride than merely, there is better flexibility, elasticity, easy to install, tensile strength is high, and resistance to air loss is good.

Technical scheme of the present invention is as follows:

The acrylonitrile butadiene rubber modified pvc sheathing compound of a kind of communication cable, is characterized in that being made up of the raw material of following weight part: polyvinyl chloride 65-70, paracril 20-25, soft mlcrocrystalline wax 0.3-0.5, high molecular weight polyisobutylene 4-4.5, cyanacrylate 2.5-3, dicumyl peroxide 0.3-0.6, polyisobutylene succinamide 0.3-0.5, nanometer boron fibre 3-4.

The described communication cable production method of acrylonitrile butadiene rubber modified pvc sheathing compound, is characterized in that:

(1) paracril, high molecular weight polyisobutylene, nanometer boron fibre, the cyanacrylate of 1/4, the dicumyl peroxide of 1/4 are sent into mixing roll, mixing 3-4min at 160-165 DEG C, obtains cross-linking modified paracril;

(2) polyvinyl chloride, the cyanacrylate of 1/2, the dicumyl peroxide of 1/2 are sent into mixing roll, mixing 3-4min at 160-165 DEG C, obtains cross-linking modified polyvinyl chloride;

(3) material (1) step and (2) step obtained and other remain and send into mixing roll, mixing 3-4min at 160-165 DEG C, send into twin screw extruder, extruding pelletization;

(4) pellet (3) step obtained hot pressing 5-6 min at 160-165 DEG C, is shaped, and send into baking oven, at 110-115 DEG C, aging 45-50h, to obtain final product.

Beneficial effect of the present invention

Polyvinyl chloride, paracril are carried out secondary crosslinking compound by sheath material of the present invention, without the need to sulfuration, thus enormously simplify tooling device and technique, improve efficiency, reduce cost, and intensity is high, oil-proofness is good, use polyvinyl chloride than merely, there is better flexibility, elasticity, easy to install; By using high molecular weight polyisobutylene, nanometer boron fibre, improve tensile strength and the resistance to air loss of sheath material, moistureproofness, this sheath material can be widely used in built on stilts or bury telephone cable underground, comprises air-core and vaseline filling telephone cable.

Embodiment

The acrylonitrile butadiene rubber modified pvc sheathing compound of a kind of communication cable, is made up of the raw material of following weight part (kilogram): polyvinyl chloride 67, paracril 23, soft mlcrocrystalline wax 0.4, high molecular weight polyisobutylene 4.3, cyanacrylate 2.8, dicumyl peroxide 0.5, polyisobutylene succinamide 0.4, nanometer boron fibre 3.5.

The described communication cable production method of acrylonitrile butadiene rubber modified pvc sheathing compound, is characterized in that:

(1) paracril, high molecular weight polyisobutylene, nanometer boron fibre, the cyanacrylate of 1/4, the dicumyl peroxide of 1/4 are sent into mixing roll, at 163 DEG C, mixing 3 min, obtain cross-linking modified paracril;

(2) polyvinyl chloride, the cyanacrylate of 1/2, the dicumyl peroxide of 1/2 are sent into mixing roll, at 163 DEG C, mixing 3 min, obtain cross-linking modified polyvinyl chloride;

(3) material (1) step and (2) step obtained and other remain and send into mixing roll, mixing 4 min at 163 DEG C, send into twin screw extruder, extruding pelletization;

(4) pellet (3) step obtained hot pressing 5 min at 160 DEG C, is shaped, and send into baking oven, at 113 DEG C, aging 47h, to obtain final product.

Experimental data:

The elongation at break of this sheath material is 523% after tested, resistivity (10 ¹²Ω ° of cm) be 0.468, dielectric loss is 0.087, and tensile strength (MPa) is 23, and aging coefficient is 1.02.

Claims (2)

1. the acrylonitrile butadiene rubber modified pvc sheathing compound of communication cable, is characterized in that being made up of the raw material of following weight part: polyvinyl chloride 65-70, paracril 20-25, soft mlcrocrystalline wax 0.3-0.5, high molecular weight polyisobutylene 4-4.5, cyanacrylate 2.5-3, dicumyl peroxide 0.3-0.6, polyisobutylene succinamide 0.3-0.5, nanometer boron fibre 3-4.

2. the communication cable according to claim 1 production method of acrylonitrile butadiene rubber modified pvc sheathing compound, is characterized in that:

(1) paracril, high molecular weight polyisobutylene, nanometer boron fibre, the cyanacrylate of 1/4, the dicumyl peroxide of 1/4 are sent into mixing roll, mixing 3-4min at 160-165 DEG C, obtains cross-linking modified paracril;

(2) polyvinyl chloride, the cyanacrylate of 1/2, the dicumyl peroxide of 1/2 are sent into mixing roll, mixing 3-4min at 160-165 DEG C, obtains cross-linking modified polyvinyl chloride;

(3) material (1) step and (2) step obtained and other remain and send into mixing roll, mixing 3-4min at 160-165 DEG C, send into twin screw extruder, extruding pelletization;

(4) pellet (3) step obtained hot pressing 5-6 min at 160-165 DEG C, is shaped, and send into baking oven, at 110-115 DEG C, aging 45-50h, to obtain final product.