CN112375280A - Crosslinked polyethylene insulating material special for small wires and below 3KV and preparation method thereof - Google Patents
Crosslinked polyethylene insulating material special for small wires and below 3KV and preparation method thereof Download PDFInfo
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- CN112375280A CN112375280A CN202011281481.XA CN202011281481A CN112375280A CN 112375280 A CN112375280 A CN 112375280A CN 202011281481 A CN202011281481 A CN 202011281481A CN 112375280 A CN112375280 A CN 112375280A
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- 239000011810 insulating material Substances 0.000 title claims abstract description 44
- 229920003020 cross-linked polyethylene Polymers 0.000 title claims abstract description 30
- 239000004703 cross-linked polyethylene Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 70
- 229920013716 polyethylene resin Polymers 0.000 claims abstract description 38
- PYOKUURKVVELLB-UHFFFAOYSA-N trimethyl orthoformate Chemical compound COC(OC)OC PYOKUURKVVELLB-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003054 catalyst Substances 0.000 claims abstract description 20
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 16
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000008187 granular material Substances 0.000 claims description 19
- 238000004806 packaging method and process Methods 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 16
- 238000001125 extrusion Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 9
- 238000005469 granulation Methods 0.000 claims description 9
- 230000003179 granulation Effects 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical group C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 3
- 229920001684 low density polyethylene Polymers 0.000 claims description 3
- 239000004702 low-density polyethylene Substances 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims 2
- 239000004718 silane crosslinked polyethylene Substances 0.000 abstract description 14
- 230000008602 contraction Effects 0.000 abstract description 2
- 238000004132 cross linking Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 2
- 239000012974 tin catalyst Substances 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 229960004643 cupric oxide Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
Classifications
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- 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
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5425—Silicon-containing compounds containing oxygen containing at least one C=C bond
-
- 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
- C08K5/06—Ethers; Acetals; Ketals; Ortho-esters
-
- 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
- C08K5/14—Peroxides
-
- 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
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
- C08L2312/08—Crosslinking by silane
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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)
- Processes Specially Adapted For Manufacturing Cables (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a crosslinked polyethylene insulating material special for small wires of 3KV and below and a preparation method thereof, wherein the crosslinked polyethylene insulating material comprises a material A and a material B, and the material A comprises the following components in parts by weight: 70-95 parts of polyethylene resin, 8-20 parts of silane coupling agent, 0.4-1.3 parts of cross-linking agent and 0.1-1.5 parts of trimethoxymethane; the material B comprises the following components: 80-95 parts of polyethylene resin and 0.01-0.2 part of catalyst. According to the special cross-linked polyethylene insulating material for the small wires of 3KV and below and the preparation method, the special silane cross-linked polyethylene insulating material for the small wires is developed and developed by methods of material proportion, new material introduction, process adjustment and the like, the obtained two-step cross-linked polyethylene insulating material product has good thermal extension and thermal contraction performance and more excellent processing flow performance, and the product meets the JB/T10437 and 2004 standard requirements and client processing technological requirements.
Description
Technical Field
The invention belongs to the technical field of preparation of polyethylene insulating materials, and particularly relates to a crosslinked polyethylene insulating material special for small wires of 3KV and below and a preparation method thereof.
Background
The common silane crosslinked polyethylene insulating material is a product which is prepared by taking linear low-density resin as a base material, adding a coupling agent, a catalyst (improving the crosslinking rate), a lubricant (improving the product processability and enabling the material to be easily demoulded and flow), and the like, extruding and grafting the materials by a screw in a proper proportion, and then packaging the materials and a small-package catalyst separately, wherein the materials and the small-package catalyst are mixed together when in use.
At present, the silane crosslinked polyethylene insulating material still has an advantage in the field of low-voltage cable insulation. In the production practice process of the silane crosslinked polyethylene insulating material, different varieties of room-temperature silane crosslinked polyethylene insulating materials, low-shrinkage silane crosslinked polyethylene insulating materials, copper-oxide-resistant silane crosslinked polyethylene insulating materials and the like are derived, and the silane crosslinked polyethylene insulating materials are divided into large-wire special silane crosslinked polyethylene insulating materials and small-wire special silane crosslinked polyethylene insulating materials according to the wire diameter specification. Compared with the silane crosslinked polyethylene insulating material special for the large wire, the silane crosslinked polyethylene insulating material special for the small wire has better heat shrinkage performance, heat extensibility performance and processing flow performance. Because the small-wire-diameter cable is thin in insulation thickness, generally within 1mm, the appearance of a crosslinking point on the surface of the small-wire-diameter cable is more obvious, and the small-wire-diameter cable is one of the development difficulties of the special silane crosslinked polyethylene insulating material for the small wires.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention aims to provide a crosslinked polyethylene insulating material special for small wires and below 3KV and a preparation method thereof.
In order to achieve the purpose and achieve the technical effect, the invention adopts the technical scheme that:
the special 3KV and below crosslinked polyethylene insulating material for the small wires comprises a material A and a material B, wherein the material A comprises the following components in parts by weight:
70-95 parts of polyethylene resin, 8-20 parts of silane coupling agent, 0.4-1.3 parts of cross-linking agent and 0.1-1.5 parts of trimethoxymethane;
the material B comprises the following components:
80-95 parts of polyethylene resin and 0.01-0.2 part of catalyst.
Further, the polyethylene resin is low-density polyethylene resin.
Further, the silane coupling agent is one or a combination of two of vinyltrimethoxysilane and vinyltrimethoxysilane.
Further, the cross-linking agent is dicumyl peroxide.
Further, the catalyst is an organic tin catalyst.
A preparation method of a crosslinked polyethylene insulating material special for small wires and below 3KV comprises the following steps:
feeding polyethylene resin into a double-stage screw;
secondly, adding the granules into a mixed solution of a silane coupling agent, a cross-linking agent and trimethoxymethane after the granules enter the front section of the double-stage screw;
extruding by adopting a double-step screw and then extruding by using a single screw for granulation;
fourthly, conveying the mixture by water and cooling the mixture;
drying and packaging to prepare a material A;
sixthly, in addition to the five steps, separately extruding and granulating the catalyst and the polyethylene resin, drying and packaging to obtain a material B;
and seventhly, mixing the material A and the material B and then extruding for use when the client side extrudes.
Further, in the third step, the melt extrusion temperature parameters of the material A are as follows: a first zone is 150-180 ℃; a second zone is 150-180 ℃; three areas are 100-140 ℃; the fourth zone is 160-190 ℃; the fifth area is 170-200 ℃; a sixth zone is 180-210 ℃; seven regions are 180-210 ℃; 175-205 ℃ in an eight region; the ninth area is 170-200 ℃; ten areas are 170-200 ℃; eleven regions are 150-180 ℃; the temperature of the twelve regions is 145-175 ℃; the temperature of the machine head is 165-185 ℃.
Further, in the step sixthly, the parameters of the melt extrusion temperature of the material B are as follows: a first zone is 150-180 ℃; a second zone is 150-180 ℃; a third zone is 150-180 ℃; the fourth zone is 160-190 ℃; the fifth area is 170-200 ℃; a sixth zone is 180-210 ℃; seven regions are 180-210 ℃; 175-205 ℃ in an eight region; the ninth zone is 170-190 ℃.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a crosslinked polyethylene insulating material special for small wires of 3KV and below and a preparation method thereof, wherein the crosslinked polyethylene insulating material comprises a material A and a material B, and the material A comprises the following components in parts by weight: 70-95 parts of polyethylene resin, 8-20 parts of silane coupling agent, 0.4-1.3 parts of cross-linking agent and 0.1-1.5 parts of trimethoxymethane; the material B comprises the following components: 80-95 parts of polyethylene resin and 0.01-0.2 part of catalyst, and the preparation method comprises the steps of firstly adopting a double-stage screw to extrude, carrying out extrusion processing on the double-stage screw, then carrying out extrusion granulation on the double-stage screw by a single screw, carrying out water conveying, drying and packaging to obtain a material A, and then mixing the material A with a material B to prepare the required insulating material. According to the special cross-linked polyethylene insulating material for the small wires of 3KV and below and the preparation method, the special silane cross-linked polyethylene insulating material for the small wires is developed and developed by methods of material proportion, new material introduction, process adjustment and the like, the obtained two-step cross-linked polyethylene insulating material product has good thermal extension and thermal contraction performance and more excellent processing flow performance, and the product meets the JB/T10437 and 2004 standard requirements and client processing technological requirements.
Detailed Description
The following detailed description of the embodiments of the present invention is provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, and to clearly and clearly define the scope of the present invention.
The special 3KV and below crosslinked polyethylene insulating material for the small wires comprises a material A and a material B, wherein the material A comprises the following components in parts by weight: 70-95 parts of polyethylene resin, 8-20 parts of silane coupling agent, 0.4-1.3 parts of cross-linking agent and 0.1-1.5 parts of trimethoxymethane; the material B comprises the following components: 80-95 parts of polyethylene resin and 0.01-0.2 part of catalyst.
The polyethylene resin is low-density polyethylene resin.
The silane coupling agent is one or the combination of two of vinyltrimethoxysilane and vinyltrimethoxysilane.
The cross-linking agent is dicumyl peroxide.
The catalyst is an organic tin catalyst.
A preparation method of a crosslinked polyethylene insulating material special for small wires and below 3KV comprises the following steps:
feeding 70-95 parts of polyethylene resin granules into a double-stage screw;
secondly, adding the polyethylene resin granules into the front section of the double-stage screw, and adding a mixed solution of 8-20 parts of silane coupling agent, 0.4-1.3 parts of cross-linking agent and 0.1-1.5 parts of trimethoxymethane;
extruding by adopting a double-step screw and then extruding by using a single screw for granulation;
fourthly, conveying the mixture by water and cooling the mixture;
drying and packaging to prepare a material A;
sixthly, in addition to the five steps, separately extruding and granulating 0.01-0.2 part of catalyst and 80-95 parts of polyethylene resin by using a double-stage screw rod, drying and packaging to obtain a material B;
seventhly, when the client side extrudes, the material A and the material B are mixed according to the weight ratio of 95: 5 mixing and screw extruding.
In the third step, the melting and extruding temperature parameters of the material A are as follows: a first zone is 150-180 ℃; a second zone is 150-180 ℃; three areas are 100-140 ℃; the fourth zone is 160-190 ℃; the fifth area is 170-200 ℃; a sixth zone is 180-210 ℃; seven regions are 180-210 ℃; 175-205 ℃ in an eight region; the ninth area is 170-200 ℃; ten areas are 170-200 ℃; eleven regions are 150-180 ℃; the temperature of the twelve regions is 145-175 ℃; the temperature of the machine head is 165-185 ℃.
In the step VI, the parameters of the melt extrusion temperature of the material B are as follows: a first zone is 150-180 ℃; a second zone is 150-180 ℃; a third zone is 150-180 ℃; the fourth zone is 160-190 ℃; the fifth area is 170-200 ℃; a sixth zone is 180-210 ℃; seven regions are 180-210 ℃; 175-205 ℃ in an eight region; the ninth zone is 170-190 ℃.
Example 1
A preparation method of a crosslinked polyethylene insulating material special for small wires and below 3KV comprises the following steps:
firstly, 95 parts of polyethylene resin granules are fed into a double-stage screw;
secondly, adding 10 parts of silane coupling agent, 0.8 part of cross-linking agent and 0.1 part of trimethoxy methane into the polyethylene resin granules after the polyethylene resin granules enter the front section of the double-stage screw;
extruding by adopting a double-step screw and then extruding by using a single screw for granulation;
fourthly, conveying the mixture by water and cooling the mixture;
drying and packaging to prepare a material A;
sixthly, in addition to the five steps, separately extruding and granulating 0.05 part of catalyst and 95 parts of polyethylene resin by using a double-stage screw rod, drying and packaging to obtain a material B;
seventhly, when the client side extrudes, the material A and the material B are mixed according to the weight ratio of 95: 5 mixing and screw extruding.
The extrusion was processed using the small wires made in example 1 with occasional cross-linking points on the surface.
Example 2
A preparation method of a crosslinked polyethylene insulating material special for small wires and below 3KV comprises the following steps:
firstly, 95 parts of polyethylene resin granules are fed into a double-stage screw;
secondly, adding 10 parts of silane coupling agent, 0.8 part of cross-linking agent and 0.5 part of trimethoxy methane into the polyethylene resin granules after the polyethylene resin granules enter the front section of the double-stage screw;
extruding by adopting a double-step screw and then extruding by using a single screw for granulation;
fourthly, conveying the mixture by water and cooling the mixture;
drying and packaging to prepare a material A;
sixthly, in addition to the five steps, separately extruding and granulating 0.05 part of catalyst and 95 parts of polyethylene resin by using a double-stage screw rod, drying and packaging to obtain a material B;
seventhly, when the client side extrudes, the material A and the material B are mixed according to the weight ratio of 95: 5 mixing and screw extruding.
The strands prepared in example 2 were extruded with smooth surfaces and no crosslinking points.
Example 3
A preparation method of a crosslinked polyethylene insulating material special for small wires and below 3KV comprises the following steps:
firstly, 95 parts of polyethylene resin granules are fed into a double-stage screw;
secondly, adding mixed liquid of 8 parts of silane coupling agent, 0.55 part of cross-linking agent and 0.8 part of trimethoxy methane after the polyethylene resin granules enter the front section of the double-stage screw;
extruding by adopting a double-step screw and then extruding by using a single screw for granulation;
fourthly, conveying the mixture by water and cooling the mixture;
drying and packaging to prepare a material A;
sixthly, in addition to the five steps, separately extruding and granulating 0.05 part of catalyst and 95 parts of polyethylene resin by using a double-stage screw rod, drying and packaging to obtain a material B;
seventhly, when the client side extrudes, the material A and the material B are mixed according to the weight ratio of 95: 5 mixing and screw extruding.
Extrusion was carried out using the strands prepared in example 3 with smooth surfaces and no crosslinking points.
Example 4
A preparation method of a crosslinked polyethylene insulating material special for small wires and below 3KV comprises the following steps:
firstly, 95 parts of polyethylene resin granules are fed into a double-stage screw;
adding 15 parts of silane coupling agent, 1.1 parts of cross-linking agent and 1.5 parts of trimethoxymethane into the polyethylene resin granules after the polyethylene resin granules enter the front section of the double-stage screw;
extruding by adopting a double-step screw and then extruding by using a single screw for granulation;
fourthly, conveying the mixture by water and cooling the mixture;
drying and packaging to prepare a material A;
sixthly, in addition to the five steps, separately extruding and granulating 0.06 part of catalyst and 95 parts of polyethylene resin by using a double-stage screw rod, drying and packaging to obtain a material B;
seventhly, when the client side extrudes, the material A and the material B are mixed according to the weight ratio of 95: 5 mixing and screw extruding.
Extrusion was carried out using the small wire prepared in example 4, with the surface showing uninterrupted crosslinking points and occasional bulges.
Example 5
A preparation method of a crosslinked polyethylene insulating material special for small wires and below 3KV comprises the following steps:
firstly, 95 parts of polyethylene resin granules are fed into a double-stage screw;
secondly, adding a mixed solution of 13 parts of silane coupling agent, 0.9 part of cross-linking agent and 1.5 parts of trimethoxy methane after the polyethylene resin granules enter the front section of the double-stage screw;
extruding by adopting a double-step screw and then extruding by using a single screw for granulation;
fourthly, conveying the mixture by water and cooling the mixture;
drying and packaging to prepare a material A;
sixthly, in addition to the five steps, separately extruding and granulating 0.06 part of catalyst and 95 parts of polyethylene resin by using a double-stage screw rod, drying and packaging to obtain a material B;
seventhly, when the client side extrudes, the material A and the material B are mixed according to the weight ratio of 95: 5 mixing and screw extruding.
Extrusion was carried out using the small wire prepared in example 5, with the surface showing uninterrupted crosslinking points and occasional bulges.
The main performance parameters of the special 3KV and the following crosslinked polyethylene insulating material products for the small wires obtained by the invention comprise:
thermal extension: the elongation under load is less than or equal to 55 percent
The permanent deformation after cooling is less than or equal to 0.5 percent
Thermal shrinkage: less than or equal to 0.5 percent
Density: 0.93g/cm3
Tensile strength: 23.3MPa
Elongation at break: 749.7 percent
Volume resistivity at 20 ℃: 3.5X 1014Ω·m
Dielectric strength: 32 MV/m.
The parts of the invention not specifically described can be realized by adopting the prior art, and the details are not described herein.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The special 3KV and below crosslinked polyethylene insulating material for the small wires is characterized by comprising a material A and a material B, wherein the material A comprises the following components in parts by weight:
70-95 parts of polyethylene resin, 8-20 parts of silane coupling agent, 0.4-1.3 parts of cross-linking agent and 0.1-1.5 parts of trimethoxymethane;
the material B comprises the following components:
80-95 parts of polyethylene resin and 0.01-0.2 part of catalyst.
2. The crosslinked polyethylene insulating material for small wires of 3KV and below according to claim 1, wherein the polyethylene resin is a low density polyethylene resin.
3. The crosslinked polyethylene insulation material for small wires of 3KV and below according to claim 1, wherein the silane coupling agent is one or a combination of vinyltrimethoxysilane and vinyltrimethoxysilane.
4. The crosslinked polyethylene insulation material for 3KV and below for the small wires according to claim 1, wherein the crosslinking agent is dicumyl peroxide.
5. The crosslinked polyethylene insulating material for small wires of 3KV and below according to claim 1, wherein the catalyst is an organotin catalyst.
6. The preparation method of the crosslinked polyethylene insulating material special for the small wires of 3KV and below according to any one of claims 1 to 5 is characterized by comprising the following steps:
feeding polyethylene resin into a double-stage screw;
secondly, adding the granules into a mixed solution of a silane coupling agent, a cross-linking agent and trimethoxymethane after the granules enter the front section of the double-stage screw;
extruding by adopting a double-step screw and then extruding by using a single screw for granulation;
fourthly, conveying the mixture by water and cooling the mixture;
drying and packaging to prepare a material A;
sixthly, in addition to the five steps, separately extruding and granulating the catalyst and the polyethylene resin, drying and packaging to obtain a material B;
and seventhly, mixing the material A and the material B and then extruding for use when the client side extrudes.
7. The method for preparing 3KV and the following crosslinked polyethylene insulating materials special for small wires according to claim 6, wherein in the third step, the melt extrusion temperature parameters of the material A are as follows: a first zone is 150-180 ℃; a second zone is 150-180 ℃; three areas are 100-140 ℃; the fourth zone is 160-190 ℃; the fifth area is 170-200 ℃; a sixth zone is 180-210 ℃; seven regions are 180-210 ℃; 175-205 ℃ in an eight region; the ninth area is 170-200 ℃; ten areas are 170-200 ℃; eleven regions are 150-180 ℃; the temperature of the twelve regions is 145-175 ℃; the temperature of the machine head is 165-185 ℃.
8. The method for preparing 3KV and the following crosslinked polyethylene insulating materials specially used for small wires according to claim 6, wherein in the step (sixthly), the melt extrusion temperature parameters of the material B are as follows: a first zone is 150-180 ℃; a second zone is 150-180 ℃; a third zone is 150-180 ℃; the fourth zone is 160-190 ℃; the fifth area is 170-200 ℃; a sixth zone is 180-210 ℃; seven regions are 180-210 ℃; 175-205 ℃ in an eight region; the ninth zone is 170-190 ℃.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113429729A (en) * | 2021-06-16 | 2021-09-24 | 浙江太湖远大新材料股份有限公司 | High-linear-speed silane crosslinked polyethylene insulating material and preparation process thereof |
| CN113736167A (en) * | 2021-09-30 | 2021-12-03 | 苏州亨利通信材料有限公司 | Weather-resistant silane crosslinked polyethylene overhead insulating material and preparation method thereof |
| CN116262845A (en) * | 2022-11-15 | 2023-06-16 | 浙江万马高分子材料集团有限公司 | Weather-proof and tracking-resistant silane crosslinked polyethylene insulating material and preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116262845A (en) * | 2022-11-15 | 2023-06-16 | 浙江万马高分子材料集团有限公司 | Weather-proof and tracking-resistant silane crosslinked polyethylene insulating material and preparation method thereof |
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