CN106750800A - A kind of heat endurance is good and excellent in mechanical performance PE cable material - Google Patents
A kind of heat endurance is good and excellent in mechanical performance PE cable material Download PDFInfo
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- CN106750800A CN106750800A CN201611184079.3A CN201611184079A CN106750800A CN 106750800 A CN106750800 A CN 106750800A CN 201611184079 A CN201611184079 A CN 201611184079A CN 106750800 A CN106750800 A CN 106750800A
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- 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
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- 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
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Abstract
The invention discloses a kind of heat endurance is good and excellent in mechanical performance PE cable material, its raw material includes by weight：25 45 parts of polyethylene, 16 22 parts of polyphenylene oxide, 10 20 parts of polypropylene, 4 10 parts of composite diatomite gluing fiber, 26 parts of ceramic microsphere, 8 12 parts of calcium carbonate, 6 14 parts of feldspar, 8 12 parts of glass microballoon, 1.5 2.5 parts of terephthalic acid (TPA) dibutyl ester, 0.4 1.2 parts of phosphate toluene diphenyl ester, 1.5 2.5 parts of diaminodiphenyl-methane, 590 26 parts of curing agent, concentration is 0.5 2.5 parts of 4 8% glutaraldehyde solution, 0.4 0.8 parts of colouring agent, 1.5 3.5 parts of stabilizer, 1.5 2.5 parts of antioxidant, 1.5 2.5 parts of lubricant.Hardness of the present invention is high, good toughness, mutual good dispersion, and heat endurance is good, and water resistance is excellent, excellent in mechanical performance, while thermo-oxidative stability high can be excellent.
Description
Technical field
The present invention relates to plastics arts, more particularly to a kind of heat endurance is good and excellent in mechanical performance PE cable
Material.
Background technology
Plastics are the macromolecular compound of synthesis, are the materials using raw material monomer to synthesize or condensation reaction is polymerized
Material, is made up of the additive such as synthetic resin and filler, plasticizer, stabilizer, lubricant, colorant.Most of plastics have matter
Gently, chemical stabilization, will not corrosion, good impact resistance, good insulating the advantages of.Therefore, plastics are widely used in cable material
Field.Because plastics primary raw material is the macromolecule vistanex such as PVC, PS, PP, PE, PET, but vinyon at present
Waterproof, heat endurance and mechanical property also can not meet demand, it would be highly desirable to solve.
The content of the invention
Based on the technical problem that background technology is present, the present invention proposes that a kind of heat endurance is good and excellent in mechanical performance is gathered
Ethene cable material, hardness is high, good toughness, mutual good dispersion, and heat endurance is good, and water resistance is excellent, mechanical property
Can be excellent, while thermo-oxidative stability high can be excellent.
A kind of heat endurance proposed by the present invention is good and excellent in mechanical performance PE cable material, and its raw material is by weight
Including：Polyethylene 25-45 parts, polyphenylene oxide 16-22 parts, polypropylene 10-20 parts, 4-10 parts of composite diatomite gluing fiber, ceramics
Microballoon 2-6 parts, calcium carbonate 8-12 parts, feldspar 6-14 parts, glass microballoon 8-12 parts, 1.5-2.5 parts of terephthalic acid (TPA) dibutyl ester, phosphorus
0.4-1.2 parts of sour toluene diphenyl ester, diaminodiphenyl-methane 1.5-2.5 parts, 590 curing agent 2-6 parts, concentration is 4-8% penta
0.5-2.5 parts of dialdehyde solution, colouring agent 0.4-0.8 parts, stabilizer 1.5-3.5 parts, antioxidant 1.5-2.5 parts, lubricant 1.5-
2.5 parts.
Preferably, polyethylene, polyphenylene oxide, polypropylene, the weight ratio of composite diatomite gluing fiber are 30-40：18-20：
12-18：6-8.
Preferably, composite diatomite gluing fiber, ceramic microsphere, calcium carbonate, feldspar, glass microballoon, terephthalic acid (TPA) two
Pungent fat, the weight ratio of phosphate toluene diphenyl ester are 6-8：3-5：9-11：8-12：9-11：1.8-2.2：0.6-1.
Preferably, its raw material includes by weight：Polyethylene 30-40 parts, polyphenylene oxide 18-20 parts, polypropylene 12-18 parts,
6-8 parts of composite diatomite gluing fiber, ceramic microsphere 3-5 parts, calcium carbonate 9-11 parts, feldspar 8-12 parts, glass microballoon 9-11 parts,
1.8-2.2 parts of terephthalic acid (TPA) dibutyl ester, phosphate toluene diphenyl ester 0.6-1 parts, diaminodiphenyl-methane 1.8-2.2 parts, 590
Curing agent 3-5 parts, concentration is 1-2 parts of 5-7% glutaraldehyde solutions, colouring agent 0.5-0.7 parts, stabilizer 2-3 parts, antioxidant 1.7-
2.3 parts, lubricant 1.6-2.4 parts.
Preferably, composite diatomite gluing fiber is prepared using following technique：By potassium permanganate dissolving in deionized water,
Viscose rayon immersion is added, is taken out, washing is dried to obtain pretreatment gluing fiber；Diatomite, water are mixed, ten are added
Six alkyl trimethyl ammonium bromides, absolute ethyl alcohol, heated up stirring, and filtering, filter cake is washed with water, be dry, pulverize and is obtained pre-processing silicon
Diatomaceous earth；It is 6-6.4 to adding sulfuric acid solution to adjust to pH value in acrylamide solution, adds pretreatment gluing fiber, pre- place
Reason diatomite, heat up stirring, and centrifugal dehydration obtains composite diatomite gluing fiber.
Preferably, composite diatomite gluing fiber is prepared using following technique：By potassium permanganate dissolving in deionized water,
Viscose rayon immersion 25-65min is added, is taken out, washing, be dried to obtain pretreatment gluing fiber；Diatomite, water are mixed
20-30min, adds cetyl trimethylammonium bromide, absolute ethyl alcohol, is warming up to 90-100 DEG C of stirring 35-65min, filtering, filter
Cake is washed with water, and 65-75 DEG C dries 7-9h, and crushing obtains pre-processing diatomite；It is the acryloyl of 0.5-0.9mol/L to concentration
It is 6-6.4 for the sulfuric acid solution of 0.2-0.3mol/L is adjusted to pH value that concentration is added in amine aqueous solution, adds pretreatment gluing fine
Dimension, pretreatment diatomite, are warming up to 65-75 DEG C of stirring 25-45min, and centrifugal dehydration obtains composite diatomite gluing fiber.
Preferably, composite diatomite gluing fiber is prepared using following technique：It is by weight that 0.4-1 parts of potassium permanganate is molten
Solution adds 8-16 parts of viscose rayon immersion 25-65min in 25-40 parts of deionized water, takes out, and washing is dried to obtain pretreatment
Gluing fiber；3-7 parts of diatomite, 25-35 parts of water are mixed into 20-30min by weight, 0.3-0.6 parts of hexadecane is added
Base trimethylammonium bromide, 10-20 part absolute ethyl alcohol, are warming up to 90-100 DEG C of stirring 35-65min, and filtering, filter cake is washed with water,
65-75 DEG C dries 7-9h, and crushing obtains pre-processing diatomite；It is the third of 0.5-0.9mol/L by weight to 22-30 parts of concentration
It is 6-6.4 for the sulfuric acid solution of 0.2-0.3mol/L is adjusted to pH value that concentration is added in acrylamide solution, adds 6-10 parts in advance
Treatment gluing fiber, 4-8 parts of pretreatment diatomite, are warming up to 65-75 DEG C of stirring 25-45min, and centrifugal dehydration obtains tripolite compound
Rubber alloy sticks fiber.
The present invention is obtained using conventional fabrication process.
The present invention uses 590 curing agent, diaminourea hexichol using polyethylene, polypropylene, polyphenylene oxide synergy major ingredient
Methylmethane is crosslinked, and makes heat endurance of the invention good, excellent in mechanical performance, and thermo-oxidative stability high can be excellent；And silicon
In the pretreatment diatomite of the compound gluing fiber of diatomaceous earth, cetyl trimethylammonium bromide intercalation diatomite is hydrophobic by interlayer
The intercalation of chain, enhancing and the effect for pre-processing gluing fiber, interlayer structure good stability, good waterproof performance, excellent heat stability, separately
Outer use potassium permanganate is pre-processed to viscose rayon, a large amount of living radicals is formed in gluing fiber surface, by gluing fiber
Hydroxyl is oxidized to aldehyde radical and carboxyl, triggers acrylamide graft polymerization, so by acrylamide graft on viscose rayon surface simultaneously
Polymeric layer is formed, waterproof is high with tensile strength；And composite diatomite gluing fiber and polyethylene, polypropylene, polyphenylene oxide association
Same-action, and by glutaraldehyde cross-linking, fiber surface forms network structure in composite diatomite gluing fiber, can with crosslinking after
Polyethylene, polypropylene, polyphenylene oxide IPN, can effectively strengthen tensile strength of the present invention, and thermally-stabilised good, and mechanical property is good, prevent
It is aqueous can be extremely excellent；Glass microballoon, ceramic microsphere, feldspar, calcium carbonate are further added as filler, and and terephthalic acid (TPA)
Dibutyl ester, phosphate toluene diphenyl ester coordinate, and make hardness of the present invention high, good toughness, mutual good dispersion, and make hole of the present invention
Gap rate is extremely low, and water resistance is excellent, and heat endurance is further enhanced.
Specific embodiment
Below, technical scheme is described in detail by specific embodiment.
Embodiment 1
A kind of heat endurance proposed by the present invention is good and excellent in mechanical performance PE cable material, and its raw material is by weight
Including：25 parts of polyethylene, 22 parts of polyphenylene oxide, 10 parts of polypropylene, 10 parts of composite diatomite gluing fiber, 2 parts of ceramic microsphere, carbonic acid
12 parts of calcium, 6 parts of feldspar, 12 parts of glass microballoon, 1.5 parts of terephthalic acid (TPA) dibutyl ester, 1.2 parts of phosphate toluene diphenyl ester, diaminourea
1.5 parts of diphenyl methane, 590 6 parts of curing agent, concentration is 2.5 parts of 4% glutaraldehyde solution, 0.4 part of colouring agent, stabilizer 3.5
Part, 1.5 parts of antioxidant, 2.5 parts of lubricant.
Embodiment 2
A kind of heat endurance proposed by the present invention is good and excellent in mechanical performance PE cable material, and its raw material is by weight
Including：45 parts of polyethylene, 16 parts of polyphenylene oxide, 20 parts of polypropylene, 4 parts of composite diatomite gluing fiber, 6 parts of ceramic microsphere, carbonic acid
8 parts of calcium, 14 parts of feldspar, 8 parts of glass microballoon, 2.5 parts of terephthalic acid (TPA) dibutyl ester, 0.4 part of phosphate toluene diphenyl ester, diaminourea two
2.5 parts of phenylmethane, 590 2 parts of curing agent, concentration be 0.5 part of 8% glutaraldehyde solution, 0.8 part of colouring agent, 1.5 parts of stabilizer,
2.5 parts of antioxidant, 1.5 parts of lubricant.
Composite diatomite gluing fiber is prepared using following technique：By potassium permanganate dissolving in deionized water, add viscous
Glue fiber soaks, and takes out, washing, is dried to obtain pretreatment gluing fiber；Diatomite, water are mixed, cetyl is added
Trimethylammonium bromide, absolute ethyl alcohol, heated up stirring, and filtering, filter cake is washed with water, be dry, pulverize and is obtained pre-processing diatomite；To
It is 6-6.4 to add sulfuric acid solution to adjust to pH value in acrylamide solution, adds pretreatment gluing fiber, pretreatment diatom
Soil, heat up stirring, and centrifugal dehydration obtains composite diatomite gluing fiber.
Embodiment 3
A kind of heat endurance proposed by the present invention is good and excellent in mechanical performance PE cable material, and its raw material is by weight
Including：30 parts of polyethylene, 20 parts of polyphenylene oxide, 12 parts of polypropylene, 8 parts of composite diatomite gluing fiber, 3 parts of ceramic microsphere, carbonic acid
11 parts of calcium, 8 parts of feldspar, 11 parts of glass microballoon, 1.8 parts of terephthalic acid (TPA) dibutyl ester, 1 part of phosphate toluene diphenyl ester, diaminourea two
1.8 parts of phenylmethane, 590 5 parts of curing agent, concentration is 2 parts of 5% glutaraldehyde solution, 0.5 part of colouring agent, 3 parts of stabilizer, antioxygen
1.7 parts of agent, 2.4 parts of lubricant.
Composite diatomite gluing fiber is prepared using following technique：By potassium permanganate dissolving in deionized water, add viscous
Glue fiber soaks 45min, takes out, washing, is dried to obtain pretreatment gluing fiber；Diatomite, water are mixed into 25min, plus
Enter cetyl trimethylammonium bromide, absolute ethyl alcohol, be warming up to 95 DEG C of stirring 45min, filtering, filter cake is washed with water, and 70 DEG C are done
Dry 8h, crushing obtains pre-processing diatomite；It is 0.25mol/L to concentration is added in the acrylamide solution that concentration is 0.7mol/L
Sulfuric acid solution to adjust to pH value be 6-6.4, add pretreatment gluing fiber, pretreatment diatomite, be warming up to 70 DEG C of stirrings
35min, centrifugal dehydration obtains composite diatomite gluing fiber.
Embodiment 4
A kind of heat endurance proposed by the present invention is good and excellent in mechanical performance PE cable material, and its raw material is by weight
Including：40 parts of polyethylene, 18 parts of polyphenylene oxide, 18 parts of polypropylene, 6 parts of composite diatomite gluing fiber, 5 parts of ceramic microsphere, carbonic acid
9 parts of calcium, 12 parts of feldspar, 9 parts of glass microballoon, 2.2 parts of terephthalic acid (TPA) dibutyl ester, 0.6 part of phosphate toluene diphenyl ester, diaminourea two
2.2 parts of phenylmethane, 590 3 parts of curing agent, concentration is 1 part of 7% glutaraldehyde solution, 0.7 part of colouring agent, 2 parts of stabilizer, antioxygen
2.3 parts of agent, 1.6 parts of lubricant.
Composite diatomite gluing fiber is prepared using following technique：0.4 part of potassium permanganate is dissolved in 40 parts by weight
In deionized water, 8 parts of viscose rayon immersion 65min are added, taken out, washing, be dried to obtain pretreatment gluing fiber；By weight
3 parts of diatomite, 35 parts of water are mixed into 20min, 0.6 part of cetyl trimethylammonium bromide, 10 parts of absolute ethyl alcohols are added, risen
Temperature to 100 DEG C of stirring 35min, filtering, filter cake is washed with water, and 75 DEG C dry 7h, and crushing obtains pre-processing diatomite；By weight
It is for the sulfuric acid solution for adding concentration to be 0.3mol/L in the acrylamide solution of 0.5mol/L is adjusted to pH value to 30 parts of concentration
6-6.4, adds 6 parts of pretreatment gluing fibers, 8 parts of pretreatment diatomite, is warming up to 65 DEG C of stirring 45min, and centrifugal dehydration is obtained
To composite diatomite gluing fiber.
Embodiment 5
A kind of heat endurance proposed by the present invention is good and excellent in mechanical performance PE cable material, and its raw material is by weight
Including：35 parts of polyethylene, 19 parts of polyphenylene oxide, 15 parts of polypropylene, 7 parts of composite diatomite gluing fiber, 4 parts of ceramic microsphere, carbonic acid
10 parts of calcium, 10 parts of feldspar, 10 parts of glass microballoon, 2 parts of terephthalic acid (TPA) dibutyl ester, 0.8 part of phosphate toluene diphenyl ester, diaminourea two
2 parts of phenylmethane, 590 4 parts of curing agent, concentration is 1.5 parts of 6% glutaraldehyde solution, and 0.6 part of colouring agent, 2.5 parts of stabilizer resists
2 parts of oxygen agent, 2 parts of lubricant.
Composite diatomite gluing fiber is prepared using following technique：1 part of potassium permanganate is dissolved in 25 parts by weight
In ionized water, 16 parts of viscose rayon immersion 25min are added, taken out, washing, be dried to obtain pretreatment gluing fiber；By weight
7 parts of diatomite, 25 parts of water are mixed into 30min, 0.3 part of cetyl trimethylammonium bromide, 20 parts of absolute ethyl alcohols are added, risen
Temperature to 90 DEG C of stirring 65min, filtering, filter cake is washed with water, and 65 DEG C dry 9h, and crushing obtains pre-processing diatomite；By weight
It is for the sulfuric acid solution for adding concentration to be 0.2mol/L in the acrylamide solution of 0.9mol/L is adjusted to pH value to 22 parts of concentration
6-6.4, adds 10 parts of pretreatment gluing fibers, 4 parts of pretreatment diatomite, is warming up to 75 DEG C of stirring 25min, and centrifugal dehydration is obtained
To composite diatomite gluing fiber.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept is subject to equivalent or change, should all be included within the scope of the present invention.
Claims (7)
1. a kind of heat endurance is good and excellent in mechanical performance PE cable material, it is characterised in that its raw material is wrapped by weight
Include：Polyethylene 25-45 parts, polyphenylene oxide 16-22 parts, polypropylene 10-20 parts, 4-10 parts of composite diatomite gluing fiber, ceramics are micro-
Ball 2-6 parts, calcium carbonate 8-12 parts, feldspar 6-14 parts, glass microballoon 8-12 parts, 1.5-2.5 parts of terephthalic acid (TPA) dibutyl ester, phosphoric acid
0.4-1.2 parts of toluene diphenyl ester, diaminodiphenyl-methane 1.5-2.5 parts, 590 curing agent 2-6 parts, concentration is 4-8% penta 2
0.5-2.5 parts of aldehyde solution, colouring agent 0.4-0.8 parts, stabilizer 1.5-3.5 parts, antioxidant 1.5-2.5 parts, lubricant 1.5-2.5
Part.
2. heat endurance is good according to claim 1 and excellent in mechanical performance PE cable material, it is characterised in that poly- second
Alkene, polyphenylene oxide, polypropylene, the weight ratio of composite diatomite gluing fiber are 30-40：18-20：12-18：6-8.
3. heat endurance according to claim 1 or claim 2 is good and excellent in mechanical performance PE cable material, it is characterised in that
Composite diatomite gluing fiber, ceramic microsphere, calcium carbonate, feldspar, glass microballoon, terephthalic acid (TPA) dibutyl ester, tricresyl phosphate two
The weight ratio of phenyl ester is 6-8：3-5：9-11：8-12：9-11：1.8-2.2：0.6-1.
4. the heat endurance according to claim any one of 1-3 is good and excellent in mechanical performance PE cable material, its feature
It is that its raw material includes by weight：Polyethylene 30-40 parts, polyphenylene oxide 18-20 parts, polypropylene 12-18 parts, composite diatomite
6-8 parts of gluing fiber, ceramic microsphere 3-5 parts, calcium carbonate 9-11 parts, feldspar 8-12 parts, glass microballoon 9-11 parts, terephthalic acid (TPA)
Dibutyl ester 1.8-2.2 parts, phosphate toluene diphenyl ester 0.6-1 parts, diaminodiphenyl-methane 1.8-2.2 parts, 590 curing agent 3-5
Part, concentration is 1-2 parts of 5-7% glutaraldehyde solutions, colouring agent 0.5-0.7 parts, stabilizer 2-3 parts, antioxidant 1.7-2.3 parts, profit
Lubrication prescription 1.6-2.4 parts.
5. the heat endurance according to claim any one of 1-4 is good and excellent in mechanical performance PE cable material, its feature
It is that composite diatomite gluing fiber is prepared using following technique：By potassium permanganate dissolving in deionized water, add viscose glue fine
Dimension immersion, takes out, washing, is dried to obtain pretreatment gluing fiber；Diatomite, water are mixed, cetyl front three is added
Base ammonium bromide, absolute ethyl alcohol, heated up stirring, and filtering, filter cake is washed with water, be dry, pulverize and is obtained pre-processing diatomite；To propylene
It is 6-6.4 to add sulfuric acid solution to adjust to pH value in amide solution, adds pretreatment gluing fiber, pretreatment diatomite, is risen
Temperature stirring, centrifugal dehydration obtains composite diatomite gluing fiber.
6. the heat endurance according to claim any one of 1-5 is good and excellent in mechanical performance PE cable material, its feature
It is that composite diatomite gluing fiber is prepared using following technique：By potassium permanganate dissolving in deionized water, add viscose glue fine
Dimension immersion 25-65min, takes out, washing, is dried to obtain pretreatment gluing fiber；Diatomite, water are mixed into 20-30min,
Cetyl trimethylammonium bromide, absolute ethyl alcohol are added, 90-100 DEG C of stirring 35-65min is warming up to, filtering, filter cake is washed with water
Wash, 65-75 DEG C dries 7-9h, and crushing obtains pre-processing diatomite；To concentration in the acrylamide solution of 0.5-0.9mol/L
It is 6-6.4 for the sulfuric acid solution of 0.2-0.3mol/L is adjusted to pH value to add concentration, adds pretreatment gluing fiber, pretreatment
Diatomite, is warming up to 65-75 DEG C of stirring 25-45min, and centrifugal dehydration obtains composite diatomite gluing fiber.
7. the heat endurance according to claim any one of 1-6 is good and excellent in mechanical performance PE cable material, its feature
It is that composite diatomite gluing fiber is prepared using following technique：0.4-1 parts of potassium permanganate is dissolved in 25-40 by weight
In part deionized water, 8-16 parts of viscose rayon immersion 25-65min is added, taken out, washing is dried to obtain and pre-processes gluing fiber；
3-7 parts of diatomite, 25-35 parts of water are mixed into 20-30min by weight, 0.3-0.6 parts of cetyl trimethyl bromine is added
Change ammonium, 10-20 parts of absolute ethyl alcohol, be warming up to 90-100 DEG C of stirring 35-65min, filtering, filter cake is washed with water, 65-75 DEG C of drying
7-9h, crushing obtains pre-processing diatomite；By weight to 22-30 parts of concentration in the acrylamide solution of 0.5-0.9mol/L
It is 6-6.4 for the sulfuric acid solution of 0.2-0.3mol/L is adjusted to pH value to add concentration, add 6-10 part pre-process gluing fiber,
4-8 parts of pretreatment diatomite, is warming up to 65-75 DEG C of stirring 25-45min, and centrifugal dehydration obtains composite diatomite gluing fiber.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108046919A (en) * | 2017-12-25 | 2018-05-18 | 芜湖晋诚农业科技有限公司 | A kind of composite fertilizer for improving peach quality |
| CN108912462A (en) * | 2018-07-30 | 2018-11-30 | 合肥尚强电气科技有限公司 | A kind of preparation method of the insulation shell of resistance to breakdown protection of electrical equipment |
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| CN105273282A (en) * | 2015-09-29 | 2016-01-27 | 安徽蓝德集团股份有限公司 | Flame retardation control cable with excellent mechanical performances |
| CN105949570A (en) * | 2016-06-03 | 2016-09-21 | 繁昌县菲德通讯材料设计有限公司 | Cable material with excellent mechanical performance |
| CN105968821A (en) * | 2016-06-20 | 2016-09-28 | 安徽海容电缆有限公司 | Wear-resisting and low-temperature-resisting cable material |
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| CN105273282A (en) * | 2015-09-29 | 2016-01-27 | 安徽蓝德集团股份有限公司 | Flame retardation control cable with excellent mechanical performances |
| CN105949570A (en) * | 2016-06-03 | 2016-09-21 | 繁昌县菲德通讯材料设计有限公司 | Cable material with excellent mechanical performance |
| CN105968821A (en) * | 2016-06-20 | 2016-09-28 | 安徽海容电缆有限公司 | Wear-resisting and low-temperature-resisting cable material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108046919A (en) * | 2017-12-25 | 2018-05-18 | 芜湖晋诚农业科技有限公司 | A kind of composite fertilizer for improving peach quality |
| CN108912462A (en) * | 2018-07-30 | 2018-11-30 | 合肥尚强电气科技有限公司 | A kind of preparation method of the insulation shell of resistance to breakdown protection of electrical equipment |
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