CN105037892A - Flexible cable material with good low temperature resistance and preparation method of flexible cable material - Google Patents

Abstract

The invention discloses a flexible cable material with good low temperature resistance. The flexible cable material is prepared from the following raw materials in parts by weight: 94-96 parts of high-density polyethylene, 15-17 parts of decabromodiphenyl ether, 7-9 parts of antimony trioxide, 2-3 parts of metallocene polyethylene, 2-3 parts of nano-sized magnesium hydroxide, 4-5 parts of cyclohexane, 0.2-0.3 part of gamma-aminopropyltriethoxysilane, 5-7 parts of low-temperature-resistant silicon rubber, 3-4 parts of an ACR impact modifier, 6-8 parts of 2-ethylhexyl epoxystearate, 8-10 parts of a cold-resistant plasticizer DOS, 18-20 parts of rice husks, 4-6 parts of silicon carbide and 20-22 parts of 5% hydrochloric acid. Due to the addition of 2-ethylhexyl epoxystearate and the ACR impact modifier, the low-temperature embrittlement of the polymer material can be improved, and the polymer material has higher toughness; meanwhile, a proper amount of low-temperature-resistant silicon rubber is matched and added, so that the compressibility is lowered, and the cold resistance and weather resistance of the material are further improved; the flexible cable material still has favorable toughness and strength under the condition of low temperature.

Description

Flexible cable material that a kind of resistance to low temperature is good and preparation method thereof

Technical field

The present invention relates to technical field of polymer materials, particularly relate to good flexible cable material of a kind of resistance to low temperature and preparation method thereof.

Background technology

Polyvinyl chloride (PVC) is a kind of purposes general-purpose plastics widely, different according to the amount of adding softening agent, hard, semi-rigid and flexible article can be made, modification can also be carried out with other polymer blendings, make goods that are of a great variety, different properties, consumption is very large, is one of large general-purpose plastics in the world five.The demand of polyvinyl chloride resin and polyethylene, polypropylene rank front three in the world, and have risen to first at its consumption of China.Polyvinyl chloride itself is also inherent flame retardant material, and its oxygen index is very high, and flame retardant effect is fine, but pure PVC is rigid chain segment, just start to decompose more than 90 DEG C, processing just must add softening agent, softening agent is all inflammable substance, so flexible PVC must add fire retardant just have flame retardant effect.And polyvinyl chloride can produce hydrogen chloride gas when burning, and have very large toxicity and corrodibility, and dense smoke is more.Along with the raising of environmental requirement, the adjacent benzene class such as DOP softening agent is prohibited, and will play every advantage of poly-ethylene cable material thus further.

Polyethylene (PE) is one of maximum general-purpose plastics of current production rate, there is chemical resistance, light weight, electrical insulating property, nontoxic, easy processing, lower-price characteristic, be widely used in the industries such as electrical equipment, chemical industry, packaging, food, traffic, building.But the oxygen index of PE only has 17.5%, belongs to inflammable material, therefore need to carry out flame-retardant modified process to expand its range of application to it.Also have dielectric characteristics in order to improve poly-ethylene cable material, as space charge gather, volume specific resistance and disruptive strength etc., current high voltage direct current cable generally adopts traditional method to carry out modified poly ethylene Insulation Material.Wherein blending technology improves polyethylene dielectric properties to use a kind of maximum methods, but the blended micro interface that can form two phase structure of different components, even occur to material surface infiltration and separation phenomenon, affect other dielectric properties of blend, dielectric strength may be caused to reduce as blended.Therefore, the best way is that the component that use two kinds of chemical structures are similar, consistency is good is blended to carry out, thus eliminates the detrimentally affect of the micro interface of bi-material.

In winter or the severe cold area of cold, general cable, instrument line etc. can ftracture at low temperatures, lose the provide protection of transmitting electricity and lose efficacy.So just high to the softness requirements of cable, the softness requirements particularly under extremely low temperature is high, requires that product has good weathering resistance simultaneously.

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, flexible cable material providing a kind of resistance to low temperature good and preparation method thereof.

The present invention is achieved by the following technical solutions:

The flexible cable material that resistance to low temperature is good, is made up of the raw material of following weight part: high density polyethylene(HDPE) 94-96, decabromodiphenyl oxide 15-17, antimonous oxide 7-9, metallocene PE 2-3, nano-sized magnesium hydroxide 2-3, hexanaphthene 4-5, γ-aminopropyl triethoxysilane 0.2-0.3, low temperature resistant silicon rubber 5-7, ACR impact modifier 3-4, octyl epoxy stearate 6-8, cold resistant plasticizer DOS8-10, rice husk 18-20, silicon carbide 4-6, concentration are the hydrochloric acid 20-22 of 5%.

The flexible cable material that described a kind of resistance to low temperature is good, be made up of following concrete steps:

(1) decabromodiphenyl oxide, antimonous oxide are joined in high-speed mixer, 15-20 minute is mixed at 80-90 DEG C, then the high density polyethylene(HDPE) of half amount is joined in high-speed mixer, 10-15 minute is mixed at 90-100 DEG C, finally the material mixed is placed in mill, to plasticate at 145 DEG C 8-10 minute slice, put into the dry 5-6 hour of baking oven after pulverizing, namely obtain flame-retardant master batch;

(2) nano-aluminum hydroxide and metallocene PE to be placed on respectively in 80 DEG C of Constant Temp. Ovens thermal treatment 6 hours stand-by; By dried nano-aluminum hydroxide ultrasonic disperse in hexanaphthene, form suspension, then add γ-aminopropyl triethoxysilane, suspension was poured in vessel after 20 minutes by ultrasonic disperse, put into baking oven, dry 24 hours at the temperature of 60 DEG C, obtain the nano powder of surface modification; The nano powder of dried metallocene PE and surface modification puts into mixer, and with the temperature batch mixing 30 minutes of 140 DEG C, then extruding pelletization in twin screw extruder, makes resistance and wear modified master;

(3) rice husk being put into the dry rear immersion concentration of baking oven is the hydrochloric acid of 5%, and be heated to boiling, be incubated 2 hours, then cooled and filtered goes out rice husk, first cryodrying, then put into calcining furnace, with the temperature calcination 2 hours of 550 DEG C, take out after cooling, put into pulverizer and pulverize, cross 200 mesh sieves; Low temperature resistant silicon rubber is put into Banbury mixer banburying after 10 minutes, count 200 object calcining powdered rice hulls, silicon carbide, ACR impact modifiers, continue banburying discharging after 15 minutes, be ground into particle after cooling, obtain mixture;

(4) flame-retardant master batch, resistance are worn modified master, mixture, remaining high density polyethylene(HDPE) and all the other remaining components and put into high-speed mixer, it is 160 DEG C in temperature, 15 minutes are mixed under the speed of 500 revs/min, blanking in 10 minutes is mixed again with the speed of 2000 revs/min, then twin screw extruder extruding pelletization is put into, finally by pellet in 80 DEG C of baking ovens dry 24 hours and get final product.

Advantage of the present invention is: the present invention is by the modification of recipe optimization, add the composition such as nano-aluminum hydroxide and metallocene PE, the introducing of these compositions significantly reduces injection and the gathering of space charge, improve space charge characteristic, improve DC breakdown strength of electric field, simultaneously due to containing a small amount of metallocene PE, improve tensile strength and the over-all properties of CABLE MATERIALS.Add decabromodiphenyl oxide and antimonous oxide, synergy, decreases the growing amount of inflammable gas, changes the resolution model of polymkeric substance, the thermostability of material is improved.Simultaneous reactions decomposites SbBr ₃, the long period can rest on combustion zone, there is dilution and buffer action, improve flame retardant properties further.

The present invention adds octyl epoxy stearate and ACR impact modifier, can improve the low temperature brittleness of macromolecular material, gives the toughness that it is higher, and coordinate simultaneously and add appropriate low temperature resistant silicon rubber, compressibility diminishes, and improves winter hardiness, weathering resistance further; Rice husk also carries out as filler after a series of art breading by the present invention, as strengthening agent, has good electrical insulating property simultaneously.Product of the present invention under cryogenic, still has good toughness and intensity.

Embodiment

The flexible cable material that resistance to low temperature is good, is made up of the raw material of following weight part: high density polyethylene(HDPE) 94, decabromodiphenyl oxide 15, antimonous oxide 7, metallocene PE 2, nano-sized magnesium hydroxide 2, hexanaphthene 4, γ aminopropyl triethoxysilane 0.2, low temperature resistant silicon rubber 5, ACR impact modifier 3, octyl epoxy stearate 6, cold resistant plasticizer DOS8, rice husk 18, silicon carbide 4, concentration are the hydrochloric acid 20 of 5%.

The flexible cable material that described a kind of resistance to low temperature is good, be made up of following concrete steps:

(1) decabromodiphenyl oxide, antimonous oxide are joined in high-speed mixer, 15 minutes are mixed at 80 DEG C, then the high density polyethylene(HDPE) of half amount is joined in high-speed mixer, 10 minutes are mixed at 90 DEG C, finally the material mixed is placed in mill, to plasticate at 145 DEG C 8 minutes slices, put into baking oven after pulverizing dry 5 hours, namely obtain flame-retardant master batch;

(2) nano-aluminum hydroxide and metallocene PE to be placed on respectively in 80 DEG C of Constant Temp. Ovens thermal treatment 6 hours stand-by; By dried nano-aluminum hydroxide ultrasonic disperse in hexanaphthene, form suspension, then add γ aminopropyl triethoxysilane, suspension was poured in vessel after 20 minutes by ultrasonic disperse, put into baking oven, dry 24 hours at the temperature of 60 DEG C, obtain the nano powder of surface modification; The nano powder of dried metallocene PE and surface modification puts into mixer, and with the temperature batch mixing 30 minutes of 140 DEG C, then extruding pelletization in twin screw extruder, makes resistance and wear modified master;

(3) rice husk being put into the dry rear immersion concentration of baking oven is the hydrochloric acid of 5%, and be heated to boiling, be incubated 2 hours, then cooled and filtered goes out rice husk, first cryodrying, then put into calcining furnace, with the temperature calcination 2 hours of 550 DEG C, take out after cooling, put into pulverizer and pulverize, cross 200 mesh sieves; Low temperature resistant silicon rubber is put into Banbury mixer banburying after 10 minutes, count 200 object calcining powdered rice hulls, silicon carbide, ACR impact modifiers, continue banburying discharging after 15 minutes, be ground into particle after cooling, obtain mixture;

(4) flame-retardant master batch, resistance are worn modified master, mixture, remaining high density polyethylene(HDPE) and all the other remaining components and put into high-speed mixer, it is 160 DEG C in temperature, 15 minutes are mixed under the speed of 500 revs/min, blanking in 10 minutes is mixed again with the speed of 2000 revs/min, then twin screw extruder extruding pelletization is put into, finally by pellet in 80 DEG C of baking ovens dry 24 hours and get final product.

CABLE MATERIALS of the present invention is applied to the production of cable, after testing, the index reached is as follows for cable product: tensile strength >=16MPa, and fracture extension rate >=280%, elongation at break velocity of variation is 15.9%, oxygen index >=28%, dielectric strength >=30MV/m.

Claims (2)

1. the flexible cable material that a resistance to low temperature is good, it is characterized in that, be made up of the raw material of following weight part: high density polyethylene(HDPE) 94-96, decabromodiphenyl oxide 15-17, antimonous oxide 7-9, metallocene PE 2-3, nano-sized magnesium hydroxide 2-3, hexanaphthene 4-5, γ-aminopropyl triethoxysilane 0.2-0.3, low temperature resistant silicon rubber 5-7, ACR impact modifier 3-4, octyl epoxy stearate 6-8, cold resistant plasticizer DOS8-10, rice husk 18-20, silicon carbide 4-6, concentration are the hydrochloric acid 20-22 of 5%.

2. the flexible cable material that a kind of resistance to low temperature is good according to claim 1, is characterized in that, is made up of following concrete steps:

(1) decabromodiphenyl oxide, antimonous oxide are joined in high-speed mixer, 15-20 minute is mixed at 80-90 DEG C, then the high density polyethylene(HDPE) of half amount is joined in high-speed mixer, 10-15 minute is mixed at 90-100 DEG C, finally the material mixed is placed in mill, to plasticate at 145 DEG C 8-10 minute slice, put into the dry 5-6 hour of baking oven after pulverizing, namely obtain flame-retardant master batch;

(2) nano-aluminum hydroxide and metallocene PE to be placed on respectively in 80 DEG C of Constant Temp. Ovens thermal treatment 6 hours stand-by; By dried nano-aluminum hydroxide ultrasonic disperse in hexanaphthene, form suspension, then add γ-aminopropyl triethoxysilane, suspension was poured in vessel after 20 minutes by ultrasonic disperse, put into baking oven, dry 24 hours at the temperature of 60 DEG C, obtain the nano powder of surface modification; The nano powder of dried metallocene PE and surface modification puts into mixer, and with the temperature batch mixing 30 minutes of 140 DEG C, then extruding pelletization in twin screw extruder, makes resistance and wear modified master;

(3) rice husk being put into the dry rear immersion concentration of baking oven is the hydrochloric acid of 5%, and be heated to boiling, be incubated 2 hours, then cooled and filtered goes out rice husk, first cryodrying, then put into calcining furnace, with the temperature calcination 2 hours of 550 DEG C, take out after cooling, put into pulverizer and pulverize, cross 200 mesh sieves; Low temperature resistant silicon rubber is put into Banbury mixer banburying after 10 minutes, count 200 object calcining powdered rice hulls, silicon carbide, ACR impact modifiers, continue banburying discharging after 15 minutes, be ground into particle after cooling, obtain mixture;

(4) flame-retardant master batch, resistance are worn modified master, mixture, remaining high density polyethylene(HDPE) and all the other remaining components and put into high-speed mixer, it is 160 DEG C in temperature, 15 minutes are mixed under the speed of 500 revs/min, blanking in 10 minutes is mixed again with the speed of 2000 revs/min, then twin screw extruder extruding pelletization is put into, finally by pellet in 80 DEG C of baking ovens dry 24 hours and get final product.