CN104974391A - Preparation method of oil-resistant cable sheath material - Google Patents

Preparation method of oil-resistant cable sheath material Download PDF

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CN104974391A
CN104974391A CN201510453972.0A CN201510453972A CN104974391A CN 104974391 A CN104974391 A CN 104974391A CN 201510453972 A CN201510453972 A CN 201510453972A CN 104974391 A CN104974391 A CN 104974391A
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parts
temperature
sheath material
oil
cable sheath
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CN104974391B (en
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傅兴琴
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Wuhan Steel Electric Wire Manufacturing Co ltd
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Abstract

The invention discloses a preparation method of an oil-resistant cable sheath material, which comprises the following steps: compounding 45-67 parts by weight of chloroprene rubber and 8-23 parts by weight of polyvinyl chloride in a Banbury mixer, keeping the temperature, and cooling to room temperature; adding 12-20 parts of decabromodiphenyl oxide, 1-9 parts of ethylene thiourea, 5-15 parts of benzoperoxide, 8-21 parts of aluminum hydroxide, 1-13 parts of dioctyl epoxytetrahydrophthalate and 4-17 parts of polyvinyl butyral, compounding for 3-5 minutes adding 3-14 parts of lubricant and 3-16 parts of antioxidant 1010, and compounding for 2-4 minutes; and carrying out thin passing in an open mill, and extruding through a double screw extruder. The cable sheath material has the advantages of higher volume resistivity, higher vertical burning grade and higher oil resistance. The method has the advantages of simple preparation technique and reasonable time and temperature control settings, and can be widely used in industrial production.

Description

A kind of preparation method of oil-resisting type cable sheath material
Technical field
The present invention relates to cable production art, particularly a kind of preparation method of oil-resisting type cable sheath material.
Background technology
Cable application is very extensive, relates to the industries such as electric power, building, communication, manufacture, all closely related with all respects of national economy.
CN104119681A discloses a kind of flame resistant cable insulating material preparation method, flame resistant cable insulating material raw material is made up of the raw material of following mass component: aluminium hydroxide 70% ~ 85%, silicon rubber 10% ~ 20%, additive 5 ~ 10%, described additive comprises 96 grades of SiO2 micro mists, explosion-proof fiber and compound resin; Aluminium hydroxide, silicon rubber and additive are mixed by quality proportioning, then bonding agent is added, described bonding agent is made up of dextrose anhydrous, borax, tropine and Industrial Salt, the interpolation quality of described bonding agent accounts for 3 ~ 6% of aluminium hydroxide, silicon rubber and additive total mass, this material improves that cable insulation material is withstand voltage, cracking resistance and fire performance.CN102952311A discloses the preparation method of Low smoke zero halogen flame retardant material for high voltage cable jacket, first high-speed mixing inorganic combustion inhibitor magnesium hydroxide, aluminium hydroxide in high-speed mixer, rotating speed 900rpm-1100rpm, when high-speed mixing is to temperature 80 DEG C ~ 90 DEG C, carries out dewatering and then carry out spraying process with 172 silane coupling agents, through the inorganic combustion inhibitor magnesium hydroxide that 172 silane coupling agents are handled well, aluminium hydroxide and metallocene PE, the ethylene vinyl acetate of melting index between 2 ~ 8, acrylic acid-grafted high density polyethylene(HDPE), organosilicon cave, molybdenumdisulphide, oxidation inhibitor and lubricant add in milling machine together to be mediated, in time mediating temperature of charge and rise to 125 DEG C ~ 135 DEG C, the kneaded material in bulk is put to lift, is delivered to melt taper feeding machine, twin screw delivered to by material by feeding machine, and to carry out extrusion molding mixing, then the granulation of singe screw extruding machine is entered, adopt the fervent granulation process of die face, the particle made enters first step whirlwind cooling separator by blower fan transport pipe, second stage whirlwind cooling separator, air-cooled vibratory screening apparatus, third stage whirlwind cooling separator, namely finished-product material is obtained, the mechanical property of sheath material obtained is like this high, wear resistance and cohesiveness good, make cable in mounting and installation process, the coat layer of power cable is not easy to wear to break.
Because the environment for use of cable is complicated, to the requirement that its performance also will be higher, as the cable of frequent operation in gasoline or diesel pool, because oil-proofness is poor, insulation reduces, and easily breaks down, there is potential safety hazard.
Summary of the invention
In order to overcome above-mentioned defect, the technical problem that the present invention solves is, a kind of preparation method of oil-resisting type cable sheath material is provided, obtained cable sheath material is by the synergy between component, improve volume specific resistance, vertical combustion grade, oil resistance, preparation technology is simple simultaneously, and time and temperature control to arrange rationally, can be widely used in industrial production.
The technical solution used in the present invention is:
A preparation method for oil-resisting type cable sheath material, comprises the following steps:
(1) by weight, 45-67 part chloroprene rubber and 8-23 part polyvinyl chloride are placed in Banbury mixer mixing, in Banbury mixer, temperature controls at 100-140 DEG C, is cooled to room temperature, obtains mixture one after insulation 10-20min;
(2) in step (1) gained mixture one, 12-20 part decabromodiphynly oxide, 1-9 part ethylene thiourea, 5-15 part benzoyl peroxide, 8-21 part aluminium hydroxide, 1-13 part epoxy tetrahydro-2-ethylhexyl phthalate and 4-17 part polyvinyl butyral acetal is added, mixing 3-5min at 110-135 DEG C of temperature, add 3-14 part lubricant and 3-16 part antioxidant 1010 again, mixing 2-4min at 95-110 DEG C of temperature, obtains mixture two;
(3) step (2) gained mixture two is placed in mill thin-pass 2-5 time, then is placed in twin screw extruder and extrudes and obtain described oil-resisting type cable sheath material.
In above-mentioned steps (1), the banburying time is 3-5min.
In above-mentioned steps (1), process of cooling controls in 30-50s.
Lubricant is one or more composition in Magnesium Stearate, Zinic stearas, polyethylene wax in above-mentioned steps (2).
In above-mentioned steps (3), extruder barrel one district temperature is 115-130 DEG C, and two district's temperature are 120-140 DEG C, and three district's temperature are 130-155 DEG C, and four district's temperature are 135-170 DEG C.
In above-mentioned steps (3), the head pressure of forcing machine is 2-7MPa.
beneficial effect
The sheath material that the present invention obtains 20 DEG C of temperature lower volume resistivity >=1013 Ω * cm, vertical combustion grade is V-0, in resistance to mineral oil test, under 75 DEG C of * 48h conditions, tensile strength change rate of strength between-14.3 ~-7.6%, between elongation at break velocity of variation-7.3 ~-4.1%; By due to the synergy between component, improve volume specific resistance, vertical combustion grade, oil resistance, preparation technology is simple simultaneously, and time and temperature control to arrange rationally, can be widely used in industrial production.
Embodiment
Embodiment 1
A preparation method for oil-resisting type cable sheath material, comprises the following steps:
(1) by weight, 45 parts of chloroprene rubbers and 8 parts of polyvinyl chloride are placed in the mixing 3min of Banbury mixer, and in Banbury mixer, temperature controls at 100 DEG C, and insulation 10min, is cooled to room temperature, obtains mixture one in 30s;
(2) in step (1) gained mixture one, add 12 parts of decabromodiphynly oxides, 1 part of ethylene thiourea, 5 parts of benzoyl peroxides, 8 parts of aluminium hydroxides, 1 part of epoxy tetrahydro-2-ethylhexyl phthalate and 4 parts of polyvinyl butyral acetals, mixing 3min at 110 DEG C of temperature, add 3 parts of Magnesium Stearates and 3 parts of antioxidant 1010s again, mixing 2min at 95 DEG C of temperature, obtains mixture two;
(3) step (2) gained mixture two is placed in mill thin-pass 2 times, be placed in twin screw extruder again and extrude and obtain described oil-resisting type cable sheath material, wherein extruder barrel one district temperature is 115 DEG C, two district's temperature are 120 DEG C, three district's temperature are 130 DEG C, four district's temperature are 135 DEG C, and the head pressure of forcing machine is 2MPa.
Embodiment 2
A preparation method for oil-resisting type cable sheath material, comprises the following steps:
(1) by weight, 67 parts of chloroprene rubbers and 23 parts of polyvinyl chloride are placed in the mixing 5min of Banbury mixer, and in Banbury mixer, temperature controls at 140 DEG C, and insulation 20min, is cooled to room temperature, obtains mixture one in 50s;
(2) in step (1) gained mixture one, add 20 parts of decabromodiphynly oxides, 9 parts of ethylene thioureas, 15 parts of benzoyl peroxides, 21 parts of aluminium hydroxides, 13 parts of epoxy tetrahydro-2-ethylhexyl phthalates and 17 parts of polyvinyl butyral acetals, mixing 5min at 135 DEG C of temperature, add 14 parts of Zinic stearass and 16 parts of antioxidant 1010s again, mixing 4min at 110 DEG C of temperature, obtains mixture two;
(3) step (2) gained mixture two is placed in mill thin-pass 5 times, be placed in twin screw extruder again and extrude and obtain described oil-resisting type cable sheath material, wherein extruder barrel one district temperature is 130 DEG C, two district's temperature are 140 DEG C, three district's temperature are 155 DEG C, four district's temperature are 170 DEG C, and the head pressure of forcing machine is 7MPa.
Embodiment 3
A preparation method for oil-resisting type cable sheath material, comprises the following steps:
(1) by weight, 47 parts of chloroprene rubbers and 11 parts of polyvinyl chloride are placed in the mixing 4min of Banbury mixer, and in Banbury mixer, temperature controls at 110 DEG C, and insulation 12min, is cooled to room temperature, obtains mixture one in 35s;
(2) in step (1) gained mixture one, add 13 parts of decabromodiphynly oxides, 2 parts of ethylene thioureas, 7 parts of benzoyl peroxides, 11 parts of aluminium hydroxides, 3 parts of epoxy tetrahydro-2-ethylhexyl phthalates and 5 parts of polyvinyl butyral acetals, mixing 4min at 115 DEG C of temperature, add 6 parts of polyethylene waxs and 7 parts of antioxidant 1010s again, mixing 3min at 100 DEG C of temperature, obtains mixture two;
(3) step (2) gained mixture two is placed in mill thin-pass 3 times, be placed in twin screw extruder again and extrude and obtain described oil-resisting type cable sheath material, wherein extruder barrel one district temperature is 120 DEG C, two district's temperature are 125 DEG C, three district's temperature are 140 DEG C, four district's temperature are 145 DEG C, and the head pressure of forcing machine is 3MPa.
Embodiment 4
A preparation method for oil-resisting type cable sheath material, comprises the following steps:
(1) by weight, 61 parts of chloroprene rubbers and 18 parts of polyvinyl chloride are placed in the mixing 4min of Banbury mixer, and in Banbury mixer, temperature controls at 130 DEG C, and insulation 18min, is cooled to room temperature, obtains mixture one in 45s;
(2) in step (1) gained mixture one, add 18 parts of decabromodiphynly oxides, 8 parts of ethylene thioureas, 12 parts of benzoyl peroxides, 19 parts of aluminium hydroxides, 10 parts of epoxy tetrahydro-2-ethylhexyl phthalates and 15 parts of polyvinyl butyral acetals, mixing 4min at 130 DEG C of temperature, add 5 parts of Zinic stearass, 6 parts of polyethylene waxs and 12 parts of antioxidant 1010s again, mixing 3min at 105 DEG C of temperature, obtains mixture two;
(3) step (2) gained mixture two is placed in mill thin-pass 4 times, be placed in twin screw extruder again and extrude and obtain described oil-resisting type cable sheath material, wherein extruder barrel one district temperature is 125 DEG C, two district's temperature are 130 DEG C, three district's temperature are 145 DEG C, four district's temperature are 160 DEG C, and the head pressure of forcing machine is 6MPa.
Embodiment 5
A preparation method for oil-resisting type cable sheath material, comprises the following steps:
(1) by weight, 54 parts of chloroprene rubbers and 17 parts of polyvinyl chloride are placed in the mixing 4min of Banbury mixer, and in Banbury mixer, temperature controls at 125 DEG C, and insulation 16min, is cooled to room temperature, obtains mixture one in 40s;
(2) in step (1) gained mixture one, add 16 parts of decabromodiphynly oxides, 6 parts of ethylene thioureas, 9 parts of benzoyl peroxides, 14 parts of aluminium hydroxides, 8 parts of epoxy tetrahydro-2-ethylhexyl phthalates and 13 parts of polyvinyl butyral acetals, mixing 4min at 120 DEG C of temperature, add 3 parts of Magnesium Stearates, 4 parts of polyethylene waxs and 9 parts of antioxidant 1010s again, mixing 3min at 100 DEG C of temperature, obtains mixture two;
(3) step (2) gained mixture two is placed in mill thin-pass 3 times, be placed in twin screw extruder again and extrude and obtain described oil-resisting type cable sheath material, wherein extruder barrel one district temperature is 120 DEG C, two district's temperature are 130 DEG C, three district's temperature are 145 DEG C, four district's temperature are 155 DEG C, and the head pressure of forcing machine is 5MPa.
Comparative example 1
Do not add epoxy tetrahydro-2-ethylhexyl phthalate with the difference of embodiment 5.
A preparation method for oil-resisting type cable sheath material, comprises the following steps:
(1) by weight, 54 parts of chloroprene rubbers and 17 parts of polyvinyl chloride are placed in the mixing 4min of Banbury mixer, and in Banbury mixer, temperature controls at 125 DEG C, and insulation 16min, is cooled to room temperature, obtains mixture one in 40s;
(2) in step (1) gained mixture one, add 16 parts of decabromodiphynly oxides, 6 parts of ethylene thioureas, 9 parts of benzoyl peroxides, 14 parts of aluminium hydroxides and 13 parts of polyvinyl butyral acetals, mixing 4min at 120 DEG C of temperature, add 3 parts of Magnesium Stearates, 4 parts of polyethylene waxs and 9 parts of antioxidant 1010s again, mixing 3min at 100 DEG C of temperature, obtains mixture two;
(3) step (2) gained mixture two is placed in mill thin-pass 3 times, be placed in twin screw extruder again and extrude and obtain described oil-resisting type cable sheath material, wherein extruder barrel one district temperature is 120 DEG C, two district's temperature are 130 DEG C, three district's temperature are 145 DEG C, four district's temperature are 155 DEG C, and the head pressure of forcing machine is 5MPa.
Comparative example 2
Do not add polyvinyl butyral acetal with the difference of embodiment 5.
A preparation method for oil-resisting type cable sheath material, comprises the following steps:
(1) by weight, 54 parts of chloroprene rubbers and 17 parts of polyvinyl chloride are placed in the mixing 4min of Banbury mixer, and in Banbury mixer, temperature controls at 125 DEG C, and insulation 16min, is cooled to room temperature, obtains mixture one in 40s;
(2) in step (1) gained mixture one, add 16 parts of decabromodiphynly oxides, 6 parts of ethylene thioureas, 9 parts of benzoyl peroxides, 14 parts of aluminium hydroxides and 8 parts of epoxy tetrahydro-2-ethylhexyl phthalates, mixing 4min at 120 DEG C of temperature, add 3 parts of Magnesium Stearates, 4 parts of polyethylene waxs and 9 parts of antioxidant 1010s again, mixing 3min at 100 DEG C of temperature, obtains mixture two;
(3) step (2) gained mixture two is placed in mill thin-pass 3 times, be placed in twin screw extruder again and extrude and obtain described oil-resisting type cable sheath material, wherein extruder barrel one district temperature is 120 DEG C, two district's temperature are 130 DEG C, three district's temperature are 145 DEG C, four district's temperature are 155 DEG C, and the head pressure of forcing machine is 5MPa.
Performance test:
The cable sheath material of embodiment 1-5 and comparative example 1-2 gained is carried out Performance Detection, and result is as following table:
As can be seen from the above table: sheath material 20 DEG C of temperature lower volume resistivity>=10 that embodiment 1-5 is obtained 13Ω * cm, vertical combustion grade is V-0, in the test of resistance to mineral oil, under 75 DEG C of * 48h conditions, tensile strength change rate of strength between-14.3 ~-7.6%, between elongation at break velocity of variation-7.3 ~-4.1%; Epoxy tetrahydro-2-ethylhexyl phthalate is not added, obtained sheath material 20 DEG C of temperature lower volume resistivity>=10 in comparative example 1 13Ω * cm, vertical combustion grade is V-0, in resistance to mineral oil test, under 75 DEG C of * 48h conditions, tensile strength change rate of strength-23.7%, elongation at break velocity of variation is-12.8%; Viscotrol C is not added, obtained sheath material 20 DEG C of temperature lower volume resistivity>=10 in comparative example 2 13Ω * cm, vertical combustion grade is V-0, in resistance to mineral oil test, under 75 DEG C of * 48h conditions, tensile strength change rate of strength-15.8%.It can thus be appreciated that, the cable sheath material that the present invention obtains be due to component between synergy, improve volume specific resistance, vertical combustion grade, oil resistance, simultaneously preparation technology is simple, and it is reasonable that time and temperature control to arrange, and can be widely used in industrial production.

Claims (6)

1. a preparation method for oil-resisting type cable sheath material, is characterized in that, comprises the following steps:
(1) by weight, 45-67 part chloroprene rubber and 8-23 part polyvinyl chloride are placed in Banbury mixer mixing, in Banbury mixer, temperature controls at 100-140 DEG C, is cooled to room temperature, obtains mixture one after insulation 10-20min;
(2) in step (1) gained mixture one, 12-20 part decabromodiphynly oxide, 1-9 part ethylene thiourea, 5-15 part benzoyl peroxide, 8-21 part aluminium hydroxide, 1-13 part epoxy tetrahydro-2-ethylhexyl phthalate and 4-17 part polyvinyl butyral acetal is added, mixing 3-5min at 110-135 DEG C of temperature, add 3-14 part lubricant and 3-16 part antioxidant 1010 again, mixing 2-4min at 95-110 DEG C of temperature, obtains mixture two;
(3) step (2) gained mixture two is placed in mill thin-pass 2-5 time, then is placed in twin screw extruder and extrudes and obtain described oil-resisting type cable sheath material.
2. the preparation method of oil-resisting type cable sheath material according to claim 1, is characterized in that: in described step (1), the banburying time is 3-5min.
3. the preparation method of oil-resisting type cable sheath material according to claim 1, is characterized in that: in described step (1), process of cooling controls in 30-50s.
4. the preparation method of oil-resisting type cable sheath material according to claim 1, is characterized in that: lubricant is one or more composition in Magnesium Stearate, Zinic stearas, polyethylene wax in described step (2).
5. the preparation method of oil-resisting type cable sheath material according to claim 1, it is characterized in that: in described step (3), extruder barrel one district temperature is 115-130 DEG C, two district's temperature are 120-140 DEG C, and three district's temperature are 130-155 DEG C, and four district's temperature are 135-170 DEG C.
6. the preparation method of oil-resisting type cable sheath material according to claim 1, is characterized in that: in described step (3), the head pressure of forcing machine is 2-7MPa.
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Patentee before: Shenzhen lizhuan Technology Transfer Center Co.,Ltd.

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