KR20170100294A - Fluororesin composition with excellent wear-resistance, and low voltage cable having a dielectric layer made from the same - Google Patents

Fluororesin composition with excellent wear-resistance, and low voltage cable having a dielectric layer made from the same Download PDF

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KR20170100294A
KR20170100294A KR1020160022681A KR20160022681A KR20170100294A KR 20170100294 A KR20170100294 A KR 20170100294A KR 1020160022681 A KR1020160022681 A KR 1020160022681A KR 20160022681 A KR20160022681 A KR 20160022681A KR 20170100294 A KR20170100294 A KR 20170100294A
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fluorine
fluororubber
weight
vdf
rubber
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KR1020160022681A
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Korean (ko)
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주동욱
이재익
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엘에스전선 주식회사
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Publication of KR20170100294A publication Critical patent/KR20170100294A/en

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • 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
    • C08L27/16—Homopolymers or copolymers or vinylidene fluoride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/02—Halogenated hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/10—Esters; Ether-esters
    • C08K5/11—Esters; Ether-esters of acyclic polycarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L15/00—Compositions of rubber derivatives
    • C08L15/02—Rubber derivatives containing halogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • 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
    • C08L27/20—Homopolymers or copolymers of hexafluoropropene
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Organic Insulating Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The present invention relates to a low-voltage wire including a fluororesin composition excellent in both heat resistance and abrasion resistance and an insulating layer formed therefrom. Specifically, the present invention relates to a fluororesin composition which is excellent in both heat resistance, chemical resistance, and abrasion resistance which are compatible with each other, and which is improved in flexibility, cold resistance, flame retardancy, and workability so that it can be used as an insulating layer material for high heat- And an insulating layer formed from the insulating layer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a fluororesin composition having excellent abrasion resistance and an insulation layer formed therefrom,

The present invention relates to a low-voltage wire including a fluororesin composition excellent in wear resistance and an insulating layer formed therefrom. More particularly, the present invention relates to a fluorine-containing resin composition which is excellent in heat resistance and chemical resistance, excellent in flexibility and in abrasion resistance in a trade-off relation thereto, and is further improved in cold resistance, flame retardancy, To a low-voltage electric wire including a resin composition and an insulating layer formed therefrom.

The electric wire for the fuel pump and the tube for the automobile are made of the high heat-resistant material since the continuous use temperature is 200 ° C or more.

Fig. 1 schematically shows a cross section of a T6-class high heat-resistant wire which can be used as the electric wire for a fuel pump for an automobile. As shown in FIG. 1, the T6-grade high heat resistance wire may be composed of a plurality of gypsum wire conductors 10 and an insulating layer 20 of a high heat-resistant material surrounding the same, and the insulating material 20 forming the insulating layer 20 Is required to have high heat resistance.

Particularly, when the T6-grade high heat-resistant wire is used as a high heat-resistant wire for automobiles, the insulating material forming the insulating layer 20 must satisfy the heat resistance and chemical resistance according to the specifications ARX-9 and ISO 6722, , The tensile strength and elongation should satisfy a specified value (a tensile strength residual rate of 50% or more and a elongation percentage residual rate of 60% or more) by conducting a heat resistance test for 10 days in a convection oven maintained at 225 ± 1.0 ° C, Do not exceed the 25% change in outer diameter by conducting a chemical test in a convection oven at 150 ° C in 240 hours with immersion in transmission oil (auto trasmission oil).

The insulating material forming the insulating layer 20 was heated in an oven at 225 캜 for 10 days in the state of electric wires surrounding the conductor, and was subjected to evaluation of withstand voltage after bending, heating in an oven at 250 캜 for one hour, It is necessary to satisfy both of the withstand voltage evaluation and other specifications such as flexibility, pinch characteristics, cold resistance and flame retardancy.

Polyethylene, polypropylene, and polyvinyl chloride, which are conventionally used as insulating layers of conventional wires, are insufficient in heat resistance, chemical resistance, and the like to be applied to materials for insulating layers of high heat resistance wires. In use, fluorine resin is used.

The fluororesin exhibits excellent high heat resistance and chemical resistance. However, since the fluororesin has a high melting temperature, it is hard to process and has a high hardness, resulting in poor flexibility, which may make wiring work difficult when applied to wires or tubes.

In order to improve the processability of the fluorine resin, a fluorine copolymer or a terpolymer to which a monomer capable of lowering the melting temperature is applied may be used. However, a fluorine copolymer or a terpolymer having a heat resistance, chemical resistance, flexibility, cold resistance, The physical properties may be insufficient.

Further, although a technique of adding fluorine rubber to improve the flexibility of the fluorine resin is known, there is a problem that the flexibility is improved to some extent by the addition of the fluorine rubber, but the abrasion resistance is greatly deteriorated.

Therefore, there is a desperate need for a fluororesin composition which is excellent in both heat resistance, chemical resistance, and abrasion resistance that are compatible with each other, and is improved in flexibility, cold resistance, flame retardancy, workability and the like so that it can be applied to an insulating layer of high heat- to be.

An object of the present invention is to provide a fluororesin composition which is excellent in heat resistance and chemical resistance, as well as excellent in both flexibility and abrasion resistance.

It is another object of the present invention to provide a fluororesin composition which is further improved in cold resistance, flame retardancy, workability and the like required for use as an insulating layer of high heat resistance wires for automobiles.

Further, the present invention aims to provide a low-voltage electric wire having an insulating layer formed from the fluororesin composition.

In order to solve the above problems,

(Mn) having a number average molecular weight (Mn) of 50,000 to 150,000 greater than the number average molecular weight (Mn) of the first fluororubber, and a second fluororubber having a melting point of 100 to 155 ° C. A base resin comprising 3 to 10 parts by weight of a second fluorocarbon rubber having a weight average molecular weight And 3 to 7 parts by weight of a fluorine-containing processing aid, 3 to 6 parts by weight of a plasticizer, and 1 to 5 parts by weight of a crosslinking agent based on 100 parts by weight of the base resin.

The present invention also provides a fluororesin composition, wherein the fluoropolymer comprises a copolymer of vinylidene fluoride (VDF) and hexafluoropropylene (HFP).

The first fluororubber has a number average molecular weight (Mn) of 90,000 to 120,000, and the second fluororubber has a number average molecular weight (Mn) of 150,000 to 300,000.

Here, the first fluorocarbon rubber and the second fluorocarbon rubber may be a binary system (VDF + HFP) fluororubber of vinylidene fluoride (VDF) and hexafluoropropylene (HFP), vinylidene fluoride (VDF) (VDF + HFP + TFE) fluorocarbon rubber, or vinylidene fluoride (VDF), tetrafluoroethylene (TFE) and perfluoromethyl vinyl ether (HFP) PMVE) ternary system (VDF + TFE + PMVE) fluorine rubber.

Further, the fluorine resin composition is characterized in that the fluorine content (F contents) of the first fluorine rubber and the second fluorine rubber is 60 to 70%.

And a 5% secant modulus of 15 kgf / mm < 2 > or less.

Further, the fluorine-containing processing aid comprises the fluorine-containing olefinic processing aid.

And, the plasticizer comprises an aliphatic dibasic acid ester plasticizer.

Also, the fluorine resin composition is characterized in that the Mooney viscosity of the second fluorine rubber is 50 to 70 larger than the Mooney viscosity of the first fluorine rubber.

Here, the first fluororubber has a Mooney viscosity of 40 to 80, and the second fluororubber has a Mooney viscosity of 100 to 150.

On the other hand, one or more gypsum wire conductors; And an insulating layer formed from the fluororesin composition according to any one of claims 1 and 2, and a conductor layer surrounding the conductor.

The fluororesin composition according to the present invention can improve flexibility and workability as well as heat resistance and chemical resistance by adopting a fluoropolymer having a controlled melting point as a base resin, And excellent abrasion resistance in a trade-off relationship is improved.

Further, the fluororesin composition according to the present invention exhibits excellent effects satisfying all of the cold resistance, flame retardancy and workability required for use as an insulating layer of high heat resistance wires for automobiles by the addition of processing aids, plasticizers and the like.

1 schematically shows a cross section of a T6-grade high heat-resistant wire.

Hereinafter, preferred embodiments of the present invention will be described in detail. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

The fluororesin composition according to the present invention may comprise, as a base resin, a resin blended with two kinds of fluorine rubber different in molecular weight from the fluorine copolymer.

The fluorocopolymer is not particularly limited as long as the melting point is 100 to 155 ° C. If the melting point of the fluorine copolymer exceeds 155 캜, the workability of the fluorine resin composition may be significantly lowered.

Examples of the fluorine copolymer include vinylidene fluoride (VDF), hexafluoropropylene (HFP), tetrafluoroethylene (TFE), chlorotetrafluoroethylene (CTFE), and purple (VDF) and hexafluoropropylene (HFP), and at least one monomer selected from the group consisting of vinylidene fluoride (VDF) and hexafluoropropylene ≪ / RTI >

The fluorine copolymer has not only excellent heat resistance and chemical resistance, but also high electrical insulation. The fluorine copolymer may contain a block or a random copolymer, and flexibility may be greatly improved as compared with a fluorine homopolymer. The flexibility of the fluorine resin composition containing the fluorine copolymer can be evaluated to be 5 kg secant modulus of the specimen prepared therefrom of 15 kgf / mm2 or less.

The first fluororubber, which is one of the two kinds of fluororubbers contained in the base resin, is a fluororubber having a number average molecular weight (Mn) of 90,000 to 120,000 and a Mooney viscosity of 40 to 80, and includes vinylidene fluoride (VDF) (VDF + HFP) fluororubber of propylene (HFP) or a combination of vinylidene fluoride (VDF), hexafluoropropylene (HFP) and tetrafluoroethylene (TFE) or vinylidene fluoride (VDF), tetrafluoroethylene (VDF + HFP + TFE) fluorine rubber of ethylene (TFE) and perfluoromethyl vinyl ether (PMVE). The first fluororubber can further improve the flexibility, cold resistance, processability and the like of the fluororesin composition.

The second fluorocarbon rubber which is another one of the two types of fluorocarbon rubber is a fluorocarbon rubber having a number average molecular weight (Mn) of 150,000 to 300,000 and a Mooney viscosity of 100 to 150, and is similar to the first fluorocarbon rubber, . ≪ / RTI > The second fluororubber can improve the abrasion resistance of the fluororesin composition.

Wherein the content of the fluorine copolymer is 50 to 70 parts by weight, the content of the first fluorine rubber is 25 to 45 parts by weight, and the content of the second fluorine rubber is 3 to 10 parts by weight .

If the content of the fluorine copolymer is less than 50 parts by weight, the heat resistance and chemical resistance of the fluororesin composition may be insufficient, while if it exceeds 70 parts by weight, the flexibility of the fluororesin composition may be greatly deteriorated.

If the content of the first fluororubber is less than 25 parts by weight, the flexibility, cold resistance and workability of the fluororesin composition may be insufficient, while if it exceeds 45 parts by weight, abrasion resistance of the fluororesin composition may be significantly deteriorated have.

Further, if the content of the second fluororubber is less than 3 parts by weight, the fluororesin composition may have insufficient abrasion resistance, while if it exceeds 10 parts by weight, the flexibility of the fluororesin composition may be greatly reduced.

Here, the fluorine content (F contents) of the first fluorine rubber and the second fluorine rubber may be preferably 60 to 70%, more preferably 66%, and the number average molecular weight (Mn ) Is larger than the number average molecular weight (Mn) of the first fluororubber by 50,000 to 150,000, and accordingly, the Mooney viscosity of the second fluororubber is preferably 50 to 70 larger than the Mooney viscosity of the first fluororubber.

As described above, the fluororesin composition according to the present invention can improve not only the heat resistance and the chemical resistance but also the flexibility and workability by including the fluororesin having a controlled melting point as a base resin at a specific blending ratio, By including two kinds of fluorine rubbers having different viscosities in a specific blending ratio, flexibility and wear resistance that are in conflict with each other can be improved.

The fluororesin composition according to the present invention may further contain additives such as processing aids, plasticizers, crosslinking agents, and the like.

The processing aid acts to maintain the physical properties of the fluororesin composition after heating, in particular, the elongation percentage, and the usual processing aid such as polyethylene wax can be annihilated upon heating. Therefore, the processing aid has excellent heat resistance, A fluorine-containing processing aid, for example, a fluorinated olefin-based processing aid. The amount of the processing aid may be 3 to 7 parts by weight based on 100 parts by weight of the base resin.

The plasticizer may be added to further improve the cold resistance and processability of the fluorine resin composition. For example, phthalate ester, aliphatic dibasic acid ester, polyester, epoxy plasticizer and the like may be used And 3 to 6 parts by weight based on 100 parts by weight of the base resin.

The crosslinking agent can improve the room temperature properties, particularly the tensile strength and the heat resistance, of the fluororesin composition through crosslinking of the fluororesin. For example, an amine type, a silane type, a polyol type, and a peroxide type crosslinking agent can be used And 1 to 5 parts by weight based on 100 parts by weight of the base resin.

The present invention relates to a low-voltage wire including a plurality of gypsum wire conductors and an insulating layer formed by the fluorine resin composition as an insulating layer surrounding the same.

[Example]

1. Manufacturing Example

The fluororesin composition specimens and wire specimens according to Examples and Comparative Examples were prepared with the constituents and contents shown in Table 1 below. The fluororesin composition specimen was manufactured by kneading at 155 ° C for 30 minutes using a 3 L kneader. The wire specimen was manufactured to have an outer diameter of 1.72 mm by using a conductor of 0.5 mm 2 through a wire extruder. The unit of the content shown in Table 1 below is parts by weight.

2. Property evaluation

1) Room temperature properties (tensile strength, elongation and flexibility)

The tensile strength, elongation and flexibility of each of the fluorine resin composition specimens of the examples and comparative examples were measured in accordance with ARX-9 standards. The tensile strength was 1.05 kgf / mm 2 or more, the elongation was 150% or more and the flexibility was 5% Good (?) When the modulus was 15 kgf / mm2 or less, and poor (X) when the modulus was 15 kgf / mm2 or more.

2) Properties after heating (tensile strength and elongation)

The tensile strength and elongation were measured after 240 hours of heating test in 225 ° C convection oven according to the ARX-9 standards. The tensile strength residual ratio was 50% or more, elongation percentage was 60 %.

3) Cold resistance evaluation

According to the ARX-9 and ISO 6722 standards, the wire specimens of each of the examples and comparative examples were wound in a mandrel of 5 magnets in a convection oven at -40 캜, followed by a cold resistance test for about 4 hours with a weight of 5 kg alone. There should be no cracks by making two revolutions at the speed of 1 time per second.

4) Abrasion resistance evaluation

According to the ARX-9 standard, each wire specimen of Examples and Comparative Examples should not be energized for at least 457 mm in length while rubbing against a sandpaper under a load of 450 g.

5) Evaluation of pinch characteristics

According to the ARX-9 standard, when the insulation surface of each wire specimen of each of the examples and comparative examples is pressurized, the pressure to be energized should be at least 2.7 kgf / ㎟.

6) Extrusion evaluation

Excellent extrudability (⊚), good (◯) and poor (x) were evaluated for extrusion properties for the production of wire specimens according to the examples and comparative examples, respectively.


 Example Comparative Example One 2 One 2 3 4 5 6 7 8 9 10 11 12



Furtherance Resin 1 50 70 45 72 58 50 50 50 50 50 50 50 50 Resin 2 50 Rubber 1 40 27 45 25 40 38 40 40 40 40 40 40 40 40 Rubber 2 10 3 10 3 2 12 10 10 10 10 10 10 Rubber 3 10 Rubber 4 10 Processing aid 1 6 6 6 6 6 6 6 6 6 6 6 6 6 Processing aid 2 6 Plasticizer 5 5 5 5 5 5 5 5 5 5 0 8 5 5 Cross-linking agent 2.5 3 2.5 3 3 2.5 2.5 2.5 2.5 2.5 2.5 2.5 0 10 Item spec. Properties Room temperature
The tensile strength 1.05
kgf / mm2 One.
50 One.
72 One.
48 One.
79 One.
57 One.
47 One.
69 One.
47 One.
68 One.
49 One.
84 One.
43 One.
37 One.
69 Room temperature
Elongation rate 150% 348 271 371 265 389 377 327 358 366 367 373 361 462 261 Tensile strength residual rate 50% 95 93 94 94 92 95 95 93 95 127 102 - - 108 Elongation rate
Residual rate 60% 92 94 98 97 93 95 93 97 98 14 98 - - 91 flexibility ○ ○ ○ ○ × ○ ○ × ○ ○ ○ ○ ○ ○ ○ Cold resistance ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ × ○ ○ × Abrasion resistance 457 mm 520 677 487 721 421 537 647 409 566 498 739 391 547 549 Pinch characteristics 2.7kgf / mm < 2 & 3.4 5.1 2.3 5.7 2.5 3.6 4.9 2.3 3.4 3.2 6.3 2.2 3.8 4.1 Extrudability ◎ ○ ◎ ◎ ○ ◎ ◎ × ◎ ○ × ◎ ○ ◎ ◎ ◎

Resin 1: A block copolymerized PVDF resin having a melting point of 140 to 145 DEG C (manufactured by Arkema (trade name: Kynarflex 2800)

Resin 2: A homopolymerized PVDF resin having a melting point of 160 DEG C (manufactured by Arkema, product name: Kynarflex 2850)

Rubber 1: Fluorine rubber (molecular weight: 100,000, Mooney viscosity: 62, fluorine content: 66%)

Rubber 2: fluorine rubber (molecular weight: 200,000, Mooney viscosity: 124, fluorine content: 66%)

Rubber 3: Fluorine rubber (molecular weight: 130,000, Mooney viscosity: 97, fluorine content: 66%)

Rubber 4: Fluorine rubber (molecular weight: 350,000, Mooney viscosity: 150, fluorine content: 66%)

Processing aid 1: Processing aid for fluorine rubber (Solvay, product name: Tecnoflon FPA-1)

Processing aid 2: General processing aid (PE wax)

Plasticizer: bis (2-ethylhexyl) sebacate (manufactured by LG Chem, product name: DOS)

Crosslinking agent: trimethylolpropane trimethacrylate (TMPTMA) (manufactured by Sartomer, product name: SR-350)

As shown in Table 1, the electric wires including the fluororesin compositions of Examples 1 and 2 and the insulating layer formed therefrom according to the present invention maintain their physical properties even after heating to have excellent heat resistance, and in particular, It has been confirmed that the abrasion resistance, other cold resistance, pinch properties, and extrudability satisfy the specifications of ARX-9 and ISO 6722, respectively.

On the other hand, the electric wire specimen of Comparative Example 1 had a poor pinch characteristic because the fluororesin composition forming the insulating layer thereof contained an insufficient amount of fluoropolymer, and the fluororesin composition of Comparative Example 2 contained an excessive amount of fluoropolymer And the flexibility was greatly reduced.

In addition, the fluororesin composition of Comparative Example 3 contained an insufficient amount of the second fluororubber, so that the abrasion resistance and pinch characteristics were deteriorated. In the fluororesin composition of Comparative Example 4, the second fluororubber was added in an excess amount, .

Further, the fluororesin composition of Comparative Example 5 was degraded in flexibility by using a resin having a high melting point.

On the other hand, the electric wire specimen of Comparative Example 6 had insufficient wear resistance and pinch characteristics because the molecular weight of the fluorine rubber contained in the fluorine resin composition forming the insulating layer was insufficient to be 150,000 or less, and the electric wire specimen of Comparative Example 7 had an insulating layer The molecular weight of the fluororubber contained in the fluororesin composition to be formed was more than 300,000 and the extrudability deteriorated.

In addition, the fluororesin composition of Comparative Example 8 was found to have a remarkably reduced elongation percentage after heating due to disappearance of the processing aid at the heating conditions by adding a general processing aid instead of a processing aid for fluorine hardening. The fluororesin composition of Comparative Example 9 It was confirmed that the composition of the electric wire specimen of Comparative Example 10 contained the excessive amount of the plasticizer in the fluororesin composition forming the insulating layer and the abrasion resistance and the pinch characteristics were both lowered.

The fluororesin composition of Comparative Example 11 did not contain a crosslinking agent, so that the heat resistance was greatly lowered. Therefore, the tensile strength residual rate and elongation percentage residual rate after heating after melting in the oven for heating test could not be evaluated. It was confirmed that the cold resistance was significantly lowered by containing an excessive amount of the crosslinking agent.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. You can do it. It is therefore to be understood that the modified embodiments are included in the technical scope of the present invention if they basically include elements of the claims of the present invention.

10: conductor 20: insulating layer

Claims (11)

(Mn) having a number average molecular weight (Mn) of 50,000 to 150,000 greater than the number average molecular weight (Mn) of the first fluororubber, and a second fluororubber having a melting point of 100 to 155 占 폚, A base resin comprising 3 to 10 parts by weight of a second fluorocarbon rubber having a weight average molecular weight And
3 to 7 parts by weight of a fluorine-containing processing aid, 3 to 6 parts by weight of a plasticizer and 1 to 5 parts by weight of a crosslinking agent based on 100 parts by weight of the base resin. The method according to claim 1,
Wherein the fluorine-containing copolymer comprises a copolymer of vinylidene fluoride (VDF) and hexafluoropropylene (HFP). 3. The method according to claim 1 or 2,
Wherein the first fluororubber has a number average molecular weight (Mn) of 90,000 to 120,000, and the second fluororubber has a number average molecular weight (Mn) of 150,000 to 300,000. The method of claim 3,
The first fluorocarbon rubber and the second fluorocarbon rubber may be a binary system (VDF + HFP) fluororubber of vinylidene fluoride (VDF) and hexafluoropropylene (HFP), vinylidene fluoride (VDF), hexafluoropropylene (VDF + HFP + TFE) fluorine rubber, or vinylidene fluoride (VDF), tetrafluoroethylene (TFE), and perfluoromethyl vinyl ether (PMVE), of tetrafluoroethylene (HFP) and tetrafluoroethylene (TFE) (VDF + TFE + PMVE) fluorine rubber. 5. The method of claim 4,
Wherein the fluorocarbon content (F contents) of the first fluorocarbon rubber and the second fluorocarbon rubber is 60 to 70%. 3. The method according to claim 1 or 2,
And a 5% secant modulus of 15 kgf / mm < 2 > or less. 3. The method according to claim 1 or 2,
Wherein the fluorine-containing processing aid comprises a fluorinated olefin-based processing aid. 3. The method according to claim 1 or 2,
Wherein the plasticizer comprises an aliphatic dibasic acid ester plasticizer. 3. The method according to claim 1 or 2,
Wherein the Mooney viscosity of the second fluorocarbon rubber is 50 to 70 larger than the Mooney viscosity of the first fluorocarbon rubber. 10. The method of claim 9,
Wherein the first fluororubber has a Mooney viscosity of 40 to 80 and the second fluororubber has a Mooney viscosity of 100 to 150. The fluororubber composition according to claim 1, One or more conductors; And
And an insulating layer formed from the fluorocarbon resin composition according to claim 1 or 2 to wrap the conductor.
KR1020160022681A 2016-02-25 2016-02-25 Fluororesin composition with excellent wear-resistance, and low voltage cable having a dielectric layer made from the same KR20170100294A (en)

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