CN105713147A - Irradiation-crosslinked material for coaxial cables and preparation method thereof - Google Patents

Irradiation-crosslinked material for coaxial cables and preparation method thereof Download PDF

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Publication number
CN105713147A
CN105713147A CN201610272989.0A CN201610272989A CN105713147A CN 105713147 A CN105713147 A CN 105713147A CN 201610272989 A CN201610272989 A CN 201610272989A CN 105713147 A CN105713147 A CN 105713147A
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cable material
parts
foaming
cross
coaxial cable
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钱东力
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ZHONGSHAN FANYA ELECTRIC INDUSTRY Co Ltd
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ZHONGSHAN FANYA ELECTRIC INDUSTRY Co Ltd
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Priority to CN201610272989.0A priority Critical patent/CN105713147A/en
Publication of CN105713147A publication Critical patent/CN105713147A/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
    • C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0012—Combinations of extrusion moulding with other shaping operations combined with shaping by internal pressure generated in the material, e.g. foaming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/04—After-treatment of articles without altering their shape; Apparatus therefor by wave energy or particle radiation, e.g. for curing or vulcanising preformed articles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/46—Polymerisation initiated by wave energy or particle radiation
    • 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
    • C08J9/06—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 by a chemical blowing agent
    • C08J9/10—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 by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102—Azo-compounds
    • C08J9/103—Azodicarbonamide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • 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
    • H01B3/441—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 alkenes
    • 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
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
    • 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
    • C08J2207/00—Foams characterised by their intended use
    • C08J2207/06—Electrical wire insulation
    • 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
    • C08J2351/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2351/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • 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
    • 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)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The invention discloses an irradiation-crosslinked material for coaxial cables and a preparation method thereof. The irradiation-crosslinked material for coaxial cables is produced by using a foamed crosslinked cable material as a foaming layer. The foamed crosslinked cable material comprises the following components in parts by weight: 90-95 parts of LDPE (low-density polyethylene), 5-10 parts of TMPTA (trihydroxymethyl propane triacrylate) and 0.1-0.5 part of AC (azodicarbonamide). The preparation method comprises the following steps: respectively carrying out melt extrusion by a sheath-foam-sheath three-layer coextruder, cooling, coiling and irradiating. The material is simple in composition, and the added aids are decreased, thereby enhancing the dielectric loss angle of the material. The product has the advantages of environment friendliness, high safety, long service life, chemical resistance and irradiation resistance, and can resist the ambient temperature of 105 DEG C.

Description

A kind of cross-linking radiation coaxial cable material and preparation method thereof
[technical field]
The present invention relates to a kind of cross-linking radiation coaxial cable material and preparation method thereof, belong to electricity Cable technical field.
[background technology]
The heat resisting temperature of conventional communications coaxial cable is about 80 DEG C, in ambient temperature relatively now Under high state, transmission performance is unstable, easily causes decay and increases, distorted signals.Generally fluorine Plastic coaxial cable uses temperature to reach 200 DEG C, but the higher meeting of its fluorinated volume bring environmental issue and It is to use to be limited to.On the other hand, in order to improve processing characteristics, add multiple in the material Auxiliary agent, but these add auxiliary agent and can have a strong impact on the electric property of communication cable.
[summary of the invention]
The invention aims to overcome the defect of prior art, it is provided that a kind of Environmental Safety, Heat-resisting weatherability, and the electricity function index of communication cable requirement can be met, service life is long Irradiation foaming crosslinking coaxial cable material.
It is a further object of the present invention to provide a kind of above-mentioned irradiation foaming crosslinking coaxial cable material Preparation method.
The present invention for achieving the above object, by the following technical solutions:
A kind of cross-linking radiation coaxial cable material, it is characterised in that use foaming crosslinked cable material Producing, described foaming crosslinked cable material includes following weight portion component:
LDPE 90～95 parts
TMPTA 5～10 parts
AC 0.1～0.5 part.
One cross-linking radiation coaxial cable material of the present invention, it is characterised in that described foaming crosslinking electricity Cable material includes following weight portion component:
LDPE 93～95 parts
TMPTA 5～8 parts
AC 0.3～0.5 part.
One cross-linking radiation coaxial cable material of the present invention, it is characterised in that described foaming crosslinking electricity Cable material includes following weight portion component:
LDPE 90～93 parts
TMPTA 8～10 parts
AC 0.1～0.3 part.
One cross-linking radiation coaxial cable material of the present invention, it is characterised in that described foaming crosslinking electricity Cable material includes following weight portion component:
LDPE 92～94 parts
TMPTA 5～8 parts
AC 0.2～0.3 part.
Wherein LDPE (Low Density Polyethylene) is cable insulant, and melt index is less than 1.8g/10min, dielectric constant is not more than 2.3, and dielectric loss angle is less than 0.00007；TMPTA (trimethylolpropane trimethacrylate) is sensitizer；AC (azodicarbonamide) is foaming Agent.
One cross-linking radiation coaxial cable material of the present invention, it is characterised in that by following preparation side Legal system must foam crosslinked cable material: adds in Bitruder molten by each component mix homogeneously Melt extrusion, after cooling, be dried pelletizing again.
Bitruder each section heating-up temperature of preparation foaming crosslinked cable material specifically sets Fixed as follows:
1st district: 140～160 DEG C, 2nd district: 150～170 DEG C, 3rd district: 160～170 DEG C, 4th district: 155～175 DEG C.
The preparation method of the present invention a kind of cross-linking radiation coaxial cable material, it is characterised in that bag Include following steps:
A, the foaming crosslinked cable material of the present invention is added dehydrator, in temperature 80-85 DEG C Under be dried 120min；
B, will dry after foaming crosslinked cable material to add draw ratio be the foaming extrusion molding of 1:35 In machine, injection pressure be 18～24MPa nitrogen extrude foaming layer, at endothelium extruding machine and Crust extruding machine is separately added into 105 DEG C of IXPE CABLE MATERIALS for extruding endothelium Layer and exodermis, use skin-three-layer co-extruded extruding machine of bubble-skin melt extrude and cool down；
Sending irradiator that heart yearn is carried out beam bombardment irradiation after c, closing quotation, irradiation dose is 16M.
Wherein in step b, endodermis and 105 DEG C of irradiation that exodermis material is outsourcing standard are handed over Connection poly-ethylene cable material, the bubble in skin-bubble-skin is foaming layer, uses the present invention to foam and cross-links electricity Cable material nitrogen injection physical blowing form.
Each district heating-up temperature of the three-layer co-extruded extruding machine of the present invention sets as shown in table 1.
Table 1:
Project 1 district's (DEG C) 2～7 districts' (DEG C) 8 districts' (DEG C) 9 districts' (DEG C)
Endothelium extruding machine 140～160C 170～180 —— ——
Foaming extruding machine 155～165C 160～180 165～190 180～230
Crust extruding machine 140～160 170～180 190～200 ——
Endodermis of the present invention adds the adhesive force of metallic conductor and foaming insulation layer；Exodermis energy Guarantee the cable insulation heart yearn outer surface flat smooth of crosslinked foaming process, external diameter rounding, stable, Up to standard to guarantee coax impedance and standing-wave ratio performance.
Cross-linking radiation coaxial cable insulation cable heart yearn of the present invention is to use crosslinked foaming material to produce, profit The high-power electron beam bombardment insulating barrier produced with electron accelerator, interrupts formation high score by strand Sub-free radical, then high molecular free radical is reassembled into cross-bond, so that original is linear Molecular structure changes over three-dimensional netted molecular structure and forms foaming cross linked insulation layer.
Radiation cross-linked and foamed coaxial cable have environmental protection, safety, life-span length, have special heat-resisting The feature such as property, chemical resistance, radiation hardness.The resistance to ambient temperature of generic coaxial cable work is general Being 75 DEG C, the resistance to ambient temperature of radiation cross-linked and foamed coaxial cable work is up to 105 DEG C.
Compared with prior art, the present invention has the following advantages:
Material of the present invention composition is simple, adds auxiliary agent and reduces, improves the dielectric loss angle of material, And the product environmental protection prepared, safety, service life is long, chemical resistance, and radiation hardness is heat-resisting Performance can reach resistance to ambient temperature 105 DEG C.
[detailed description of the invention]
A kind of cross-linking radiation coaxial cable material, uses foaming crosslinked cable material and cross-links poly-second Alkene cable material percutaneous-three-layer co-extruded extrusion molding of bubble-skin produces, wherein foaming crosslinked cable material bag Include following weight portion component: LDPE 90～95 parts, TMPTA 5～10 parts, AC 0.1～0.5 Part；
Wherein each component mix homogeneously is added twin-screw extrusion when preparing by foaming crosslinked cable material Machine melt extrudes, after cooling, is dried pelletizing again；
When preparing cross-linking radiation coaxial cable material, first foaming crosslinked cable material is added drying Machine, is dried 120min, the foaming crosslinked cable after then drying at temperature 80～85 DEG C Material adds in the foaming extruding machine that draw ratio is 1:35, and injection pressure is 18～24MPa Nitrogen extrudes foaming layer, is separately added into 105 DEG C of crosslinkings in endothelium extruding machine and crust extruding machine Poly-ethylene cable material extrudes endodermis and exodermis, uses skin-three-layer co-extruded extruding machine of bubble-skin Melt extrude and cool down, after closing quotation, sending irradiator, with 16M irradiation dose, heart yearn is carried out electron beam Bombardment irradiation.
Below by way of detailed description of the invention, the present invention done further more detailed description.
Embodiment 1:
By following weight portion component mix homogeneously by Bitruder preparation foaming crosslinked cable material Material: LDPE 90 parts, TMPTA 10 parts, AC 0.5 part.
Prepared foaming crosslinked cable material is added in dehydrator hopper, in 80 DEG C of drying 120min, the foaming crosslinked cable material after then processing adds in foaming extruder hopper, Nitrogen injection, pressure is 20MPa, in being separately added into by 105 DEG C of twisted polyethylene cable materials In skin extruding machine and crust extruder hopper, use three-layer co-extruded extruding machine melted → extrusion respectively → cooling → closing quotation → irradiation technique produces.
Each district heating-up temperature of three-layer co-extruded extruding machine sets as follows:
Embodiment 2:
By following weight portion component mix homogeneously by Bitruder preparation foaming crosslinked cable Material: LDPE 93 parts, TMPTA 8 parts, AC 0.3 part.
Prepared foaming crosslinked cable material is added in dehydrator hopper, in 83 DEG C of drying 120min, the foaming crosslinked cable material after then processing adds in foaming extruder hopper, Nitrogen injection, pressure is 18MPa, in being separately added into by 105 DEG C of twisted polyethylene cable materials Three-layer co-extruded melted → extrusion → the cooling of employing in skin extruding machine and crust extruder hopper → receive Dish → irradiation technique produces.
Each district heating-up temperature of three-layer co-extruded extruding machine sets as follows:
Embodiment 3:
By following weight portion component mix homogeneously by Bitruder preparation foaming crosslinked cable Material: LDPE 95 parts, TMPTA 5 parts, AC 0.5 part.
Prepared foaming crosslinked cable material is added in dehydrator hopper, in 85 DEG C of drying 120min, the foaming crosslinked cable material after then processing adds in foaming extruder hopper, Nitrogen injection, pressure is 24MPa, in being separately added into by 105 DEG C of twisted polyethylene cable materials Three-layer co-extruded melted → extrusion → the cooling of employing in skin extruding machine and crust extruder hopper → receive Dish → irradiation technique produces.
Each district heating-up temperature of three-layer co-extruded extruding machine sets as follows:
Cross-linking radiation coaxial cable material prepared by above example 1-3, resistance to ambient temperature Reach 105 DEG C.

Claims (6)

1. a cross-linking radiation coaxial cable material, it is characterised in that use foaming crosslinked cable material Material produces, and described foaming crosslinked cable material includes following weight portion component:
LDPE 90～95 parts
TMPTA 5～10 parts
AC 0.1～0.5 part.
A kind of cross-linking radiation coaxial cable material the most according to claim 1, its feature exists Following weight portion component is included in described foaming crosslinked cable material:
LDPE 93～95 parts
TMPTA 5～8 parts
AC 0.3～0.5 part.
A kind of cross-linking radiation coaxial cable material the most according to claim 1, its feature exists Following weight portion component is included in described foaming crosslinked cable material:
LDPE 90～93 parts
TMPTA 8～10 parts
AC 0.1～0.3 part.
A kind of cross-linking radiation coaxial cable material the most according to claim 1, its feature exists Following weight portion component is included in described foaming crosslinked cable material:
LDPE 92～94 parts
TMPTA 5～8 parts
AC 0.2～0.3 part.
5. according to a kind of cross-linking radiation coaxial cable material according to any one of claim 1-4 Material, it is characterised in that prepare foaming crosslinked cable material by following preparation method: by each component Mix homogeneously addition Bitruder melt extrudes, after cooling, is dried pelletizing again.
6. a preparation method for cross-linking radiation coaxial cable material described in claim 5, its It is characterised by comprising the following steps:
A, the crosslinked cable material that will foam add dehydrator, are dried at temperature 80～85 DEG C 120min；
B, will dry after foaming crosslinked cable material to add draw ratio be the foaming extrusion molding of 1:35 In machine, injection pressure be 18～24MPa nitrogen extrude foaming layer, at endothelium extruding machine and Crust extruding machine is separately added into 105 DEG C of cross-linked poly-ethylene cable materials and extrudes endodermis and crust Layer, uses skin-three-layer co-extruded extruding machine of bubble-skin melt extrude and cool down；
Sending irradiator that heart yearn is carried out beam bombardment irradiation after c, closing quotation, irradiation dose is 16M。
CN201610272989.0A 2016-04-28 2016-04-28 Irradiation-crosslinked material for coaxial cables and preparation method thereof Pending CN105713147A (en)

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CN109243714A (en) * 2018-09-21 2019-01-18 安徽华电线缆股份有限公司 A kind of Dampproof coaxial cable and its manufacturing process
CN113185750A (en) * 2021-04-26 2021-07-30 中国工程物理研究院流体物理研究所 Microwave dielectric material and preparation method and application thereof

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Cited By (2)

* Cited by examiner, † Cited by third party
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CN109243714A (en) * 2018-09-21 2019-01-18 安徽华电线缆股份有限公司 A kind of Dampproof coaxial cable and its manufacturing process
CN113185750A (en) * 2021-04-26 2021-07-30 中国工程物理研究院流体物理研究所 Microwave dielectric material and preparation method and application thereof

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