CN108822451A - A kind of cable sheathing material and preparation method thereof adding PFA - Google Patents
A kind of cable sheathing material and preparation method thereof adding PFA Download PDFInfo
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- CN108822451A CN108822451A CN201810419718.2A CN201810419718A CN108822451A CN 108822451 A CN108822451 A CN 108822451A CN 201810419718 A CN201810419718 A CN 201810419718A CN 108822451 A CN108822451 A CN 108822451A
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L45/00—Compositions of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Compositions of derivatives of such polymers
- C08L45/02—Compositions of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Compositions of derivatives of such polymers of coumarone-indene polymers
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- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/443—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C08L2203/00—Applications
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- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
- C08L2207/24—Recycled plastic recycling of old tyres and caoutchouc and addition of caoutchouc particles
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- C—CHEMISTRY; METALLURGY
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- C08L2312/00—Crosslinking
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Abstract
The invention discloses a kind of cable sheathing materials for adding PFA, are made of the raw material of following parts by weight：30 ~ 50 parts of PFA, 20 ~ 40 parts of nitrile rubber, 15 ~ 25 parts of Corvic, 2 ~ 5 parts of waste and old tire rubber powder, 1 ~ 3 part of pitch, 2 ~ 5 parts of titanium dioxide, 1 ~ 3 part of chlorinated paraffin, 0.5 ~ 1.5 part of dibasicity calcium stearate, 0.5 ~ 1.5 part of ESCALOL 567,3 ~ 5 parts of plastics reinforcing agent, 1 ~ 3 part of aluminium hydroxide, 2 ~ 4 parts of crosslinking agent, 1 ~ 2 part of assistant crosslinking agent, the present invention discloses a kind of preparation methods of cable sheathing material for adding PFA.The sheath material that the present invention obtains is added with work by secondary cross-linking, and without vulcanization, production method is simple, processes and easy to use；Sheath material of the invention has excellent heat resistance and ageing-resistant performance, long service life；With excellent electrical insulation capability, nonhygroscopic, insulation resistance is big；Coefficient of friction is low, has excellent corrosion resistance and environmental stress crack resistance and thermal cracking resistance.
Description
Technical field
The present invention relates to cable sheathing field of material technology, and in particular to it is a kind of add PFA cable sheathing material and its
Preparation method.
Background technique
With social city, technicalization, hommization development, the high speed development of plastic industry, cable materials are increasingly
Close to people's lives, it is known that the effect of cable sheathing is that the insulated wire cores of cable is protected not to be damaged under external force
Wound, the protective layer to play a protective role.Since the using face of cable is especially wide, the use environment faced is especially complex,
Sheath material may face the influence of the mal-conditions such as various frictions, burn into abrasion, high temperature, shield in complicated use environment
The dielectric level and machinery level for covering thin point can all decline, along with routine jacket test detects or occur line-to-ground event
Barrier, cable sheathing thin point is possible will be breakdown, in this way, the protective action of cable sheathing will lose.In addition to this, electric wire electricity
Cable, which is electrified for a long time, will generate a large amount of heat, and the maximum operating temperature that cable can carry depends on the insulating layer and shield of cable
Cover material, in Cable insulation and sheath material, polyvinyl chloride is relatively cheap, and good mechanical performance is easy to process, so that it grows
The most material of cabling industry usage quantity is become since long, cable conductor allows operating temperature to be 70 DEG C, but polyvinyl chloride is long
Phase is using temperature no more than 65 DEG C.Lower cable sheathing is used for a long time easily to occur aging, tensile yield strength mostly and stretch strong
It is low with the problems such as brittle, volume resistivity is low to spend low, toughness.
Tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer（PFA）It is a kind of Multipurpose resin, there is fabulous proof stress
Cracking performance and electrical insulation capability, fine corrosion resistance, current rare PFA are applied to cable sheathing material to improve existing shield
The insufficient research of cover material.
Summary of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of high stress crack resistance performances, ageing-resistant, resistance to for adding PFA
Corrosive cable sheathing material and preparation method thereof.
The present invention solve the technical solution that uses of above-mentioned technical problem for：A kind of cable sheathing material adding PFA, by
The raw material of following parts by weight forms：30 ~ 50 parts of PFA, 20 ~ 40 parts of nitrile rubber, 15 ~ 25 parts of Corvic, waste and old tire
2 ~ 5 parts of rubber powder, 1 ~ 3 part of pitch, 2 ~ 5 parts of titanium dioxide, 1 ~ 3 part of chlorinated paraffin, 0.5 ~ 1.5 part of dibasicity calcium stearate, 2- hydroxyl
0.5 ~ 1.5 part of base -4- methoxy benzophenone, 1 ~ 3 part of aluminium hydroxide, 0.5 ~ 1.5 part of zinc oxide, is handed over 3 ~ 5 parts of plastics reinforcing agent
Join 2 ~ 4 parts of agent, 1 ~ 2 part of assistant crosslinking agent.
Further, the PFA is tetrafluoroethylene-perfluoro propyl vinyl ether copolymer or tetrafluoroethylene-perfluoro first
Base vinyl ether co-polymer.
Further, the crosslinking agent is cumyl peroxide and diallyl phthalate, mass parts ratio
It is 3 ~ 5:1.
Further, the assistant crosslinking agent is trimethylol-propane trimethacrylate.
Further, the plastics reinforcing agent is one of DH-1, DH-2, DH-3, DH-4 plastics reinforcing agent.
A kind of preparation method of the cable sheathing material of addition PFA comprising following steps：
（1）Raw material is on the waiting list according to the parts by weight；
（2）PFA, Corvic, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in kneading machine,
3 ~ 5min is kneaded at 200 ~ 210 DEG C；
（3）Nitrile rubber, waste and old tire rubber powder, pitch, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in
In kneading machine, 3 ~ 5min is kneaded at 150 ~ 160 DEG C；
（4）Carbon black and aluminium hydroxide are added in the silane coupling agent that 3-5 times of weight mass fraction is 1-3%, ultrasonic disperse 30-
40min, and it is sufficiently dry, obtain filler ingredient；
（5）By step（2）, step（3）It obtains being kneaded material and step（4）Obtained filler ingredient and other surplus stocks is total
With being placed in kneading machine, it is kneaded 3 ~ 5min at 200 ~ 210 DEG C, is subsequently placed in extruding pelletization in double screw extruder；
（6）By step（4）Obtained pellet 1 ~ 2min of hot pressing at 210 ~ 220 DEG C, is then fed into baking oven, at 100 ~ 105 DEG C
30 ~ 40h of aging is to get sheath material of the invention.
Compared with prior art, what the present invention had has the beneficial effect that：Cable sheathing material provided by the invention uses PFA
With nitrile rubber and Corvic Compound Machining, tear-proof, corrosion-resistant, flex cracking resistance of composite material etc. are effectively improved
Performance and processing performance；The sheath material that the present invention obtains is added with work by secondary cross-linking, and without vulcanization, production method is simple,
It processes and easy to use；Sheath material of the invention has excellent heat resistance and ageing-resistant performance, long service life；With excellent
Good electrical insulation capability, nonhygroscopic, insulation resistance is big；Coefficient of friction is low, has excellent corrosion resistance and environmental stress resistance
Cracking behavior and thermal cracking resistance.
Specific embodiment
The present invention is described further combined with specific embodiments below, it should further be noted that of the invention
Embodiment is without being limited thereto.
Embodiment 1：A kind of cable sheathing material adding PFA, is made of the raw material of following parts by weight：PFA 30~
50 parts, 20 ~ 40 parts of nitrile rubber, 15 ~ 25 parts of Corvic, 3 parts of waste and old tire rubber powder, 2 parts of pitch, 4 parts of titanium dioxide, chlorination
2 parts of paraffin, 1 part of dibasicity calcium stearate, 1 part of ESCALOL 567,4 parts of plastics reinforcing agent, aluminium hydroxide
2 parts, 3 parts of crosslinking agent, 1.5 parts of assistant crosslinking agent.
Further, it at 35~75 DEG C is sticky solid coumarone indene resin that the PFA, which is softening point,；The crosslinking
Agent is cumyl peroxide and diallyl phthalate, and mass parts ratio is 4:1；The assistant crosslinking agent is three hydroxyl first
Base propane trimethyl acrylic ester；The plastics reinforcing agent is DH-1 plastics reinforcing agent.
A kind of preparation method of the cable sheathing material of addition PFA comprising following steps：
（1）Raw material is on the waiting list according to the parts by weight；
（2）PFA, Corvic, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in kneading machine,
4min is kneaded at 205 DEG C；
（3）Nitrile rubber, waste and old tire rubber powder, pitch, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in
In kneading machine, 4min is kneaded at 155 DEG C；
（4）Carbon black and aluminium hydroxide are added in the silane coupling agent that 4 times of weight mass fractions are 2%, ultrasonic disperse 35min, and
It is sufficiently dry, obtain filler ingredient；
（5）By step（2）, step（3）It obtains being kneaded material and step（4）Obtained filler ingredient and other surplus stocks is total
With being placed in kneading machine, it is kneaded 4min at 205 DEG C, is subsequently placed in extruding pelletization in double screw extruder；
（6）By step（4）Obtained pellet hot pressing 1.5min at 215 DEG C, is then fed into baking oven, the aging 35h at 100 DEG C,
Up to sheath material of the invention.
Embodiment 2：A kind of cable sheathing material adding PFA, is made of the raw material of following parts by weight：PFA 30~
50 parts, 20 ~ 40 parts of nitrile rubber, 15 ~ 25 parts of Corvic, 4 parts of waste and old tire rubber powder, 1.5 parts of pitch, 4.5 parts of titanium dioxide,
1.5 parts of chlorinated paraffin, 1.2 parts of dibasicity calcium stearate, 0.8 part of ESCALOL 567, plastics reinforcing agent
4.5 parts, 1.5 parts of aluminium hydroxide, 3.5 parts of crosslinking agent, 1.2 parts of assistant crosslinking agent.
Further, it at 35~75 DEG C is sticky solid coumarone indene resin that the PFA, which is softening point,；The crosslinking
Agent is cumyl peroxide and diallyl phthalate, and mass parts ratio is 7:2；The assistant crosslinking agent is three hydroxyl first
Base propane trimethyl acrylic ester；The plastics reinforcing agent is DH-2 plastics reinforcing agent.
A kind of preparation method of the cable sheathing material of addition PFA comprising following steps：
（1）Raw material is on the waiting list according to the parts by weight；
（2）PFA, Corvic, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in kneading machine,
5min is kneaded at 210 DEG C；
（3）Nitrile rubber, waste and old tire rubber powder, pitch, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in
In kneading machine, 3min is kneaded at 160 DEG C；
（4）Carbon black and aluminium hydroxide are added in the silane coupling agent that 5 times of weight mass fractions are 1%, ultrasonic disperse 40min, and
It is sufficiently dry, obtain filler ingredient；
（5）By step（2）, step（3）It obtains being kneaded material and step（4）Obtained filler ingredient and other surplus stocks is total
With being placed in kneading machine, it is kneaded 4.5min at 200 DEG C, is subsequently placed in extruding pelletization in double screw extruder；
（6）By step（4）Obtained pellet hot pressing 80s at 212 DEG C, is then fed into baking oven, the aging 38h at 102 DEG C, i.e.,
Obtain sheath material of the invention.
Embodiment 3：A kind of cable sheathing material adding PFA, is made of the raw material of following parts by weight：PFA 30~
50 parts, 20 ~ 40 parts of nitrile rubber, 15 ~ 25 parts of Corvic, 2 parts of waste and old tire rubber powder, 1 part of pitch, 2 parts of titanium dioxide, chlorination
1 part of paraffin, 0.5 part of dibasicity calcium stearate, 0.5 part of ESCALOL 567,3 parts of plastics reinforcing agent, hydrogen-oxygen
Change 1 part of aluminium, 2 parts of crosslinking agent, 1 part of assistant crosslinking agent.
Further, it at 35~75 DEG C is sticky solid coumarone indene resin that the PFA, which is softening point,；The crosslinking
Agent is cumyl peroxide and diallyl phthalate, and mass parts ratio is 3:1；The assistant crosslinking agent is three hydroxyl first
Base propane trimethyl acrylic ester；The plastics reinforcing agent of stating is DH-3 plastics reinforcing agent.
A kind of preparation method of the cable sheathing material of addition PFA comprising following steps：
（1）Raw material is on the waiting list according to the parts by weight；
（2）PFA, Corvic, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in kneading machine,
3min is kneaded at 200 DEG C；
（3）Nitrile rubber, waste and old tire rubber powder, pitch, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in
In kneading machine, 3min is kneaded at 150 DEG C；
（4）Carbon black and aluminium hydroxide are added in the silane coupling agent that 3 times of weight mass fractions are 1%, ultrasonic disperse 30min, and
It is sufficiently dry, obtain filler ingredient；
（5）By step（2）, step（3）It obtains being kneaded material and step（4）Obtained filler ingredient and other surplus stocks is total
With being placed in kneading machine, it is kneaded 3min at 200 DEG C, is subsequently placed in extruding pelletization in double screw extruder；
（6）By step（4）Obtained pellet hot pressing 1min at 210 DEG C, is then fed into baking oven, the aging 30h at 100 DEG C,
Up to sheath material of the invention.
Embodiment 4：A kind of cable sheathing material adding PFA, is made of the raw material of following parts by weight：PFA 30~
50 parts, 20 ~ 40 parts of nitrile rubber, 15 ~ 25 parts of Corvic, 5 parts of waste and old tire rubber powder, 3 parts of pitch, 5 parts of titanium dioxide, chlorination
3 parts of paraffin, 1.5 parts of dibasicity calcium stearate, 1.5 parts of ESCALOL 567,5 parts of plastics reinforcing agent, hydrogen-oxygen
Change 3 parts of aluminium, 4 parts of crosslinking agent, 2 parts of assistant crosslinking agent.
Further, it at 35~75 DEG C is sticky solid coumarone indene resin that the PFA, which is softening point,；The crosslinking
Agent is cumyl peroxide and diallyl phthalate, and mass parts ratio is 5:1；The assistant crosslinking agent is three hydroxyl first
Base propane trimethyl acrylic ester；The plastics reinforcing agent is DH-4 plastics reinforcing agent.
A kind of preparation method of the cable sheathing material of addition PFA comprising following steps：
（1）Raw material is on the waiting list according to the parts by weight；
（2）PFA, Corvic, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in kneading machine,
5min is kneaded at 210 DEG C；
（3）Nitrile rubber, waste and old tire rubber powder, pitch, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in
In kneading machine, 5min is kneaded at 160 DEG C；
（4）Carbon black and aluminium hydroxide are added in the silane coupling agent that 5 times of weight mass fractions are 3%, ultrasonic disperse 40min, and
It is sufficiently dry, obtain filler ingredient；
（5）By step（2）, step（3）It obtains being kneaded material and step（4）Obtained filler ingredient and other surplus stocks is total
With being placed in kneading machine, it is kneaded 5min at 210 DEG C, is subsequently placed in extruding pelletization in double screw extruder；
（6）By step（4）Obtained pellet hot pressing 2min at 220 DEG C, is then fed into baking oven, the aging 40h at 105 DEG C, i.e.,
Obtain sheath material of the invention.
Embodiment 5：A kind of cable sheathing material adding PFA, is made of the raw material of following parts by weight：PFA 30~
50 parts, 20 ~ 40 parts of nitrile rubber, 15 ~ 25 parts of Corvic, 5 parts of waste and old tire rubber powder, 1 part of pitch, 5 parts of titanium dioxide, chlorination
1 part of paraffin, 1.5 parts of dibasicity calcium stearate, 0.5 part of ESCALOL 567,5 parts of plastics reinforcing agent, hydrogen-oxygen
Change 1 part of aluminium, 4 parts of crosslinking agent, 1 part of assistant crosslinking agent.
Further, it at 35~75 DEG C is sticky solid coumarone indene resin that the PFA, which is softening point,；The crosslinking
Agent is cumyl peroxide and diallyl phthalate, and mass parts ratio is 9:2；The assistant crosslinking agent is three hydroxyl first
Base propane trimethyl acrylic ester；The plastics reinforcing agent of stating is DH-1 plastics reinforcing agent.
A kind of preparation method of the cable sheathing material of addition PFA comprising following steps：
（1）Raw material is on the waiting list according to the parts by weight；
（2）PFA, Corvic, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in kneading machine,
3min is kneaded at 205 DEG C；
（3）Nitrile rubber, waste and old tire rubber powder, pitch, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in
In kneading machine, 5min is kneaded at 150 DEG C；
（4）Carbon black and aluminium hydroxide are added in the silane coupling agent that 4 times of weight mass fractions are 2.5%, ultrasonic disperse 36min,
And it is sufficiently dry, obtain filler ingredient；
（5）By step（2）, step（3）It obtains being kneaded material and step（4）Obtained filler ingredient and other surplus stocks is total
With being placed in kneading machine, it is kneaded 4min at 208 DEG C, is subsequently placed in extruding pelletization in double screw extruder；
（6）By step（4）Obtained pellet hot pressing 100s at 212 DEG C, is then fed into baking oven, the aging 30h at 105 DEG C, i.e.,
Obtain sheath material of the invention.
Comparative example：A kind of cable sheathing material, is made of the raw material of following parts by weight：30 ~ 50 parts of PFA, butyronitrile rubber
20 ~ 40 parts of glue, 15 ~ 25 parts of Corvic, 3 parts of waste and old tire rubber powder, 2 parts of pitch, 4 parts of titanium dioxide, 2 parts of chlorinated paraffin, two
1 part of slag calcium stearate, 1 part of ESCALOL 567,4 parts of plastics reinforcing agent, 2 parts of aluminium hydroxide, crosslinking agent
3 parts, 1.5 parts of assistant crosslinking agent.
Further, it at 35~75 DEG C is sticky solid coumarone indene resin that the PFA, which is softening point,；The crosslinking
Agent is cumyl peroxide and diallyl phthalate, and mass parts ratio is 4:1；The assistant crosslinking agent is three hydroxyl first
Base propane trimethyl acrylic ester；The plastics reinforcing agent of stating is DH-1 plastics reinforcing agent.
A kind of preparation method of the cable sheathing material of addition PFA comprising following steps：
（1）Raw material is on the waiting list according to the parts by weight；
（2）Corvic, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in kneading machine, in
4min is kneaded at 205 DEG C；
（3）Nitrile rubber, waste and old tire rubber powder, pitch, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in
In kneading machine, 4min is kneaded at 155 DEG C；
（4）Carbon black and aluminium hydroxide are added in the silane coupling agent that 4 times of weight mass fractions are 2%, ultrasonic disperse 35min, and
It is sufficiently dry, obtain filler ingredient；
（5）By step（2）, step（3）It obtains being kneaded material and step（4）Obtained filler ingredient and other surplus stocks is total
With being placed in kneading machine, it is kneaded 4min at 205 DEG C, is subsequently placed in extruding pelletization in double screw extruder；
（6）By step（4）Obtained pellet hot pressing 1.5min at 215 DEG C, is then fed into baking oven, the aging 35h at 100 DEG C,
Up to sheath material of the invention.
Performance test is standardized to the obtained material of 1-5 of the embodiment of the present invention and comparative example, as a result as shown in the table.
| Performance | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Comparative example |
| Aging coefficient | 0.97 | 0.95 | 0.94 | 0.96 | 0.94 | 0.85 |
| Volume resistivity Ω cm | 3.1×1015 | 2.8×1015 | 4.1×1015 | 3.3×1015 | 4.6×1015 | 3.7×1015 |
| Breakdown strength KV/mm | 20.4 | 19.7 | 20.1 | 19.2 | 19.9 | 15.4 |
| Elongation at break % | 310 | 320 | 290 | 280 | 310 | 270 |
| Fracture strength MPa（23℃） | 20.5 | 20.1 | 19.7 | 20.4 | 19.5 | 15.5 |
| Fracture strength MPa（200℃） | 9.7 | 9.4 | 8.6 | 9.1 | 8.3 | 1.2 |
It should limit it is again noted that above-described embodiment is only used for being illustrated the contents of the present invention,
With any change in the comparable meaning and scope of claims of the present invention, all it is believed that being included in claims
Protection scope in.
Claims (6)
1. a kind of cable sheathing material for adding PFA, which is characterized in that be made of the raw material of following parts by weight：PFA 30~50
Part, 20 ~ 40 parts of nitrile rubber, 15 ~ 25 parts of Corvic, 2 ~ 5 parts of waste and old tire rubber powder, 1 ~ 3 part of pitch, 2 ~ 5 parts of titanium dioxide,
1 ~ 3 part of chlorinated paraffin, 0.5 ~ 1.5 part of dibasicity calcium stearate, 0.5 ~ 1.5 part of ESCALOL 567, plastics
3 ~ 5 parts of reinforcing agent, 1 ~ 3 part of aluminium hydroxide, 2 ~ 4 parts of crosslinking agent, 1 ~ 2 part of assistant crosslinking agent.
2. a kind of cable sheathing material for adding PFA according to claim 1, it is characterised in that：The PFA is tetrafluoro
Ethylene-perfluoro propyl vinyl ether copolymer or tetrafluoroethylene-perfluoro methyl vinyl ether copolymer.
3. a kind of cable sheathing material for adding PFA according to claim 1, it is characterised in that：The crosslinking agent is
Cumyl peroxide and diallyl phthalate, mass parts ratio are 3 ~ 5:1.
4. a kind of cable sheathing material for adding PFA according to claim 1, it is characterised in that：The assistant crosslinking agent
For trimethylol-propane trimethacrylate.
5. a kind of cable sheathing material for adding PFA according to claim 1, it is characterised in that：The plastics enhancing
Agent is one of DH-1, DH-2, DH-3, DH-4 plastics reinforcing agent.
6. a kind of described in any item preparation methods for the cable sheathing material for adding PFA of claim 1-5, which is characterized in that
Include the following steps：
（1）Raw material is on the waiting list according to the parts by weight；
（2）PFA, Corvic, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in kneading machine,
3 ~ 5min is kneaded at 200 ~ 210 DEG C；
（3）Nitrile rubber, waste and old tire rubber powder, pitch, 1/2 zinc oxide, 1/3 crosslinking agent and 1/3 assistant crosslinking agent are placed in
In kneading machine, 3 ~ 5min is kneaded at 150 ~ 160 DEG C；
（4）Carbon black and aluminium hydroxide are added in the silane coupling agent that 3 ~ 5 times of weight mass fractions are 1 ~ 3%, ultrasonic disperse 30 ~
40min, and it is sufficiently dry, obtain filler ingredient；
（5）By step（2）, step（3）It obtains being kneaded material and step（4）Obtained filler ingredient and other surplus stocks is total
With being placed in kneading machine, it is kneaded 3 ~ 5min at 200 ~ 210 DEG C, is subsequently placed in extruding pelletization in double screw extruder；
（6）By step（4）Obtained pellet 1 ~ 2min of hot pressing at 210 ~ 220 DEG C, is then fed into baking oven, in 100 ~ 105 DEG C
30 ~ 40h of lower aging is to get sheath material of the invention.
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Application publication date: 20181116 |