CN105440361A - Foamed sheath for foamed FEP (fluorinated ethylene propylene) cables and preparation method thereof - Google Patents
Foamed sheath for foamed FEP (fluorinated ethylene propylene) cables and preparation method thereof Download PDFInfo
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- CN105440361A CN105440361A CN201510996192.0A CN201510996192A CN105440361A CN 105440361 A CN105440361 A CN 105440361A CN 201510996192 A CN201510996192 A CN 201510996192A CN 105440361 A CN105440361 A CN 105440361A
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2309/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2309/02—Copolymers with acrylonitrile
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2427/00—Characterised by the use 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; Derivatives of such polymers
- C08J2427/02—Characterised by the use 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; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/12—Characterised by the use 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; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2427/18—Homopolymers or copolymers of tetrafluoroethylene
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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
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
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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
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
- 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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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Organic Insulating Materials (AREA)
Abstract
The invention relates to a foamed sheath for foamed FEP (fluorinated ethylene propylene) cables and a preparation method thereof. The foamed sheath for foamed FEP cables comprises the following components in percentage by weight: 15-25% of high-melt-index FEP, 5-8% of low-melt-index FEP, 2-3% of foaming agent, 25-40% of nitrile-butadiene rubber, 12-18% of polyacrylate, 10-20% of composite antioxidant, 1.5-2% of silicon dioxide powder, 0.5-1.5% of calcium carbonate and 0.2-0.5% of rare-earth oxide. The invention also relates to a preparation method of the foamed sheath. Compared with the prior art, the high-melt-index and low-melt-index mixture is adopted to enhance the toughness and foaming degree of the foamed sheath and lower the possibility of melt fracture. Certain amounts of calcium carbonate and silicon dioxide powder are added into the materials to improve the properties of the sheath and lower the cable attenuation and cable echo loss.
Description
Technical field
The invention belongs to technical field of electric wires and cables, be specifically related to foaming crust of a kind of FEP cable that foams and preparation method thereof.
Background technology
Due to the fire prevention demand of modern architecture, make high temperature fire resisting electric cable by good development prospect, can be used as at present coaxial radio-frequency cable insulation and the material of temperature resistant grade more than 200 DEG C generally has perfluoroethylene-propylene (copolymer) (FEP), tetrafluoroethylene, foaming FEP, expanded polytetrafluoroethyl(ne four kinds.Foaming FEP is that some gases are present in tetrafluoroethylene with the form of abscess, due to low-loss of its transmission, superpower and advantage in price and become welcome fluorine-containing cable on market.
The foaming crust manufacturing cost of traditional foaming FEP cable is high, production efficiency is low, complex process, and FEP foamed melt easily breaks, surface irregularity, and wire diameter is unstable, and electric property is unstable.
Summary of the invention
(1) technical problem that will solve
The present invention is in order to overcome the shortcoming that foaming crust foamed melt easily breaks, surface irregularity, wire diameter are unstable, electric property is unstable of existing foaming FEP cable, the technical problem to be solved in the present invention is to provide can the stability in significantly increase line cable footpath, for insulation foaming melt provides stable melt environment, reduce the possibility of melt fracture, the foam degrees of isolator is promoted with this, reduce the decay of cable, reduce foaming crust of cable echo loss and preparation method thereof.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides foaming crust of a kind of like this FEP cable that foams and preparation method thereof, specific as follows:
A kind of foaming crust of the FEP cable that foams, comprise following component and weight percentage: height melts fat FEP15-25%, lowly melt fat FEP5-8%, whipping agent 2-3%, paracril 25-40%, polyacrylic ester 12-18%, composite antioxidant 10-20%, silicon dioxide powder 1.5-2%, calcium carbonate 0.5-1.5%, rare earth oxide 0.2-0.5%, surplus is inevitable impurity.
Preferably, described height melts the melting index of fat FEP is 30-38g/10min; Described melting index detects under being 250 DEG C of load 2.16kg conditions.
Preferably, described low melting index of melting fat FEP is 10-14g/10min; Described melting index detects under being 190 DEG C of load 2.16kg conditions.
Preferably, described composite antioxidant is the compound of antioxidant 1010 (four (β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester) and oxidation inhibitor 245 (two β-(3-tertiary butyl-4-hydroxy-5-aminomethyl phenyl) propionic ester of triglycol); Preferably, the weight ratio of antioxidant 1010 and oxidation inhibitor 245 is 1:1.5.
Preferably, described foaming skin thickness is 0.1 ~ 0.15mm.
The preparation method of the foaming crust of foaming FEP cable of the present invention, mainly comprises the following steps:
(1) raw material is put into high-speed mixer according to proportioning, high speed 1800-2500rpm mixes, mixing 3-5 minute;
(2) low speed 400-800rpm discharging;
(3) the raw material mixed is put into Fluoroplastic extruder, be attached to uniformly outside foaming layer after this machine is extruded, extrusion temperature is 360-380 DEG C.
(3) beneficial effect
The foam foaming skin material of FEP cable of the present invention have employed height and melts fat and lowly melt lipoprotein mixture, can improve the toughness of foaming crust, promote crust foam degrees, also can reduce the possibility of melt fracture simultaneously.Another aspect adds a certain amount of calcium carbonate in preparing burden and silicon dioxide powder can improve crust performance, reduces the decay of cable, reduces cable echo loss.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
Embodiment 1
Embodiment 1-4
The preparation method of the foaming crust of foaming FEP cable, the method comprises the following steps:
(1) get the raw materials ready according to component listed by embodiment and content in table one;
(2) raw material is put into high-speed mixer according to proportioning, high speed 1800-2500rpm mixes, mixing 3-5 minute;
(3) low speed 400-800rpm discharging;
(4) the raw material mixed is put into Fluoroplastic extruder, extrusion temperature is 360-380 DEG C, is attached to uniformly outside foaming layer after this machine is extruded.
The formula table of table one embodiment 1-4 (unit: gram)
Related substances parameter in table one:
Height melts fat FEP1, and melting index is 35g/10min; Height melts fat FEP2, and melting index is 30g/10min; Height melts fat FEP3, and melting index is 38g/10min;
Lowly melt fat FEP1, melting index is 12g/10min; Lowly melt fat FEP2, melting index is 10g/10min; Lowly melt fat FEP3, melting index is 14g/10min;
Rare earth oxide 1 is cerium oxide; Rare earth oxide 2 is yttrium oxide; Rare earth oxide 3 is gadolinium sesquioxide.
Table two foams the foaming crust performance of FEP cable
Continuous item testing method in table two:
The mensuration of tensile strength is carried out, with the speed tensile sample of 25mm/min during test according to GB/T1040-1992 plastic tensile method for testing performance regulation.
The mensuration of elongation at break is carried out, with the speed tensile sample of 25mm/min during test according to GB/T1040-1992 plastic tensile method for testing performance regulation.
The mensuration of 20 DEG C of lower volume resistivity is carried out according to GB/T1410-1989 solid insulating material volume specific resistance and surface resistivity test method regulation.
The mensuration of relative permittivity is carried out according to the test method regulation of GB/T1409-88 solid insulating material relative permittivity and dielectric dissipation factor under power frequency, audio frequency, high frequency (comprising metric wave length).
Table two test result shows, and the foaming crust of the foaming FEP cable manufactured by the inventive method stretches and Resisting fractre intensity is high, toughness is large.Volume specific resistance is high, and relative permittivity is high, effectively can reduce the decay of cable, reduces cable echo loss.
The above embodiment only have expressed the preferred embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion, improvement and substitute, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (6)
1. the foaming crust of the FEP cable that foams, comprise following component and weight percentage: height melts fat FEP15-25%, lowly melt fat FEP5-8%, whipping agent 2-3%, paracril 25-40%, polyacrylic ester 12-18%, composite antioxidant 10-20%, silicon dioxide powder 1.5-2%, calcium carbonate 0.5-1.5%, rare earth oxide 0.2-0.5%, surplus is inevitable impurity.
2. the foaming crust of foaming FEP cable according to claim 1, it is characterized in that, the melting index that height melts fat FEP is 30-38g/10min; Described melting index detects under being 250 DEG C of load 2.16kg conditions.
3. the foaming crust of foaming FEP cable according to claim 1, it is characterized in that, low melting index of melting fat FEP is 10-14g/10min; Described melting index detects under being 190 DEG C of load 2.16kg conditions.
4. the foaming crust of foaming FEP cable according to claim 1, it is characterized in that, composite antioxidant is the compound of antioxidant 1010 and oxidation inhibitor 245; Preferably, the weight ratio of antioxidant 1010 and oxidation inhibitor 245 is 1:1.5.
5. the foaming crust of foaming FEP cable according to claim 1, it is characterized in that, described foaming skin thickness is 0.1 ~ 0.15mm.
6. the preparation method of the foaming crust of the foaming FEP cable as described in claim as arbitrary in claim 1-5, comprises the following steps:
(1) raw material is put into high-speed mixer according to proportioning, high speed 1800-2500rpm mixes, mixing 3-5 minute;
(2) low speed 400-800rpm discharging;
(3) extrude rear being attached to uniformly outside foaming layer by Fluoroplastic extruder, extrusion temperature is 360-380 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510996192.0A CN105440361A (en) | 2015-12-25 | 2015-12-25 | Foamed sheath for foamed FEP (fluorinated ethylene propylene) cables and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510996192.0A CN105440361A (en) | 2015-12-25 | 2015-12-25 | Foamed sheath for foamed FEP (fluorinated ethylene propylene) cables and preparation method thereof |
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| CN105440361A true CN105440361A (en) | 2016-03-30 |
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| CN201510996192.0A Pending CN105440361A (en) | 2015-12-25 | 2015-12-25 | Foamed sheath for foamed FEP (fluorinated ethylene propylene) cables and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107629368A (en) * | 2017-08-09 | 2018-01-26 | 芜湖新农夫机械有限公司 | One kind can heat preserving type perfluoroethylene-propylene CABLE MATERIALS and its manufacturing process |
| CN107722516A (en) * | 2017-09-27 | 2018-02-23 | 领亚电子科技股份有限公司 | A kind of anti-extrusion high-speed signal transmission cable insulating materials and its foam process |
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| CN101679564A (en) * | 2007-05-15 | 2010-03-24 | 纳幕尔杜邦公司 | The fluoropolymer wire insulation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107629368A (en) * | 2017-08-09 | 2018-01-26 | 芜湖新农夫机械有限公司 | One kind can heat preserving type perfluoroethylene-propylene CABLE MATERIALS and its manufacturing process |
| CN107722516A (en) * | 2017-09-27 | 2018-02-23 | 领亚电子科技股份有限公司 | A kind of anti-extrusion high-speed signal transmission cable insulating materials and its foam process |
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Application publication date: 20160330 |