CN117004121A - Boiling-proof tipping disc type silane crosslinked polyethylene insulating material and preparation method thereof - Google Patents
Boiling-proof tipping disc type silane crosslinked polyethylene insulating material and preparation method thereof Download PDFInfo
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- CN117004121A CN117004121A CN202311124568.XA CN202311124568A CN117004121A CN 117004121 A CN117004121 A CN 117004121A CN 202311124568 A CN202311124568 A CN 202311124568A CN 117004121 A CN117004121 A CN 117004121A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000011810 insulating material Substances 0.000 title claims abstract description 19
- 239000004718 silane crosslinked polyethylene Substances 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 94
- 239000011347 resin Substances 0.000 claims abstract description 30
- 229920005989 resin Polymers 0.000 claims abstract description 30
- 238000002156 mixing Methods 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 24
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 24
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 23
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 23
- 239000003112 inhibitor Substances 0.000 claims abstract description 18
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 13
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 12
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims abstract description 12
- 239000003063 flame retardant Substances 0.000 claims abstract description 12
- 229910000077 silane Inorganic materials 0.000 claims abstract description 12
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229920001971 elastomer Polymers 0.000 claims abstract description 11
- 238000004898 kneading Methods 0.000 claims abstract description 11
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 11
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 11
- 239000005060 rubber Substances 0.000 claims abstract description 11
- 239000003999 initiator Substances 0.000 claims abstract description 10
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims abstract description 9
- 235000011613 Pinus brutia Nutrition 0.000 claims abstract description 9
- 241000018646 Pinus brutia Species 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 7
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 3
- 238000001035 drying Methods 0.000 claims description 37
- CNHDIAIOKMXOLK-UHFFFAOYSA-N toluquinol Chemical group CC1=CC(O)=CC=C1O CNHDIAIOKMXOLK-UHFFFAOYSA-N 0.000 claims description 33
- 238000001125 extrusion Methods 0.000 claims description 16
- 239000008187 granular material Substances 0.000 claims description 14
- 238000009835 boiling Methods 0.000 claims description 11
- NWVVVBRKAWDGAB-UHFFFAOYSA-N hydroquinone methyl ether Natural products COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 claims description 11
- 238000004806 packaging method and process Methods 0.000 claims description 10
- 238000007605 air drying Methods 0.000 claims description 7
- 238000007602 hot air drying Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical group CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 6
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 4
- BDHJQQYODMDDLR-UHFFFAOYSA-N 2-[1-carboxy-4-(3,5-ditert-butyl-4-hydroxyphenyl)butyl]sulfanyl-5-(3,5-ditert-butyl-4-hydroxyphenyl)pentanoic acid Chemical group CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCCC(SC(CCCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(O)=O)C(O)=O)=C1 BDHJQQYODMDDLR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 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 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical group CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 2
- 238000009461 vacuum packaging Methods 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims 2
- 238000009413 insulation Methods 0.000 claims 1
- 239000002131 composite material Substances 0.000 description 13
- 229920003023 plastic Polymers 0.000 description 9
- 239000004033 plastic Substances 0.000 description 9
- 238000005086 pumping Methods 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000004594 Masterbatch (MB) Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- KIUJQVUXGLAQIX-UHFFFAOYSA-N 2-[2-carboxy-1-(3,5-ditert-butyl-4-hydroxyphenyl)butan-2-yl]sulfanyl-2-[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]butanoic acid Chemical group C=1C(C(C)(C)C)=C(O)C(C(C)(C)C)=CC=1CC(CC)(C(O)=O)SC(C(O)=O)(CC)CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 KIUJQVUXGLAQIX-UHFFFAOYSA-N 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms
- C08L23/0815—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms with aliphatic 1-olefins containing one carbon-to-carbon double bond
-
- 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
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- 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
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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
-
- 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)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a boiling-proof water pine disc type silane crosslinked polyethylene insulating material and a preparation method thereof, wherein the insulating material is prepared from the following raw materials in parts by weight: (6.2-8.3) forming a high flame-retardant oil-resistant polyvinyl chloride material, wherein the material A is prepared from the following raw materials in parts by weight: 75-85 parts of LLDPE resin, 5-10 parts of LDPE resin, 4-5 parts of processing flame retardant auxiliary agent, 1.6-1.8 parts of silane, 2.5-3.2 parts of initiator, 0.25-0.34 part of antioxidant, 1.0-1.5 parts of polymerization inhibitor and 3-4 parts of nano rubber particles; the material B is prepared from the following raw materials in parts by weight: 80 parts of LLDPE resin, 10 parts of LLDPE resin powder, 2.2-3.1 parts of catalyst, 6-8 parts of antioxidant and 2.0-4.0 parts of polymerization inhibitor. According to the invention, the antioxidant can be quickly dissolved in the silane by high-speed mixing under the heating state of the wall of the kneading pot, the strips are granulated, and then the material A and the material B are dried, and as the material A contains more initiator, the grafting degree is higher, so that the surface of the extruded cable has a matte feel, and is not particularly bright and smooth, so that the requirement of the anti-loose disc is met.
Description
Technical Field
The invention relates to the technical field of wire and cable materials, in particular to a boiling-proof tipping disc type silane crosslinked polyethylene insulating material and a preparation method thereof.
Background
With the increase of orders of electric wire and cable enterprises along with economic resuscitation, a phenomenon of loose disc appears in many two-step silane crosslinked polyethylene insulating materials after cooking crosslinking, and the phenomenon brings confusion to the cabling production process of the cable enterprises, and the situation of breaking the semi-finished electric wire occurs after the cabling speed is high. Before, the cable enterprises are reeled and reeled, so that more manpower and material resources are consumed, and the delivery period is prolonged.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a boiling-resistant tipping disc type silane crosslinked polyethylene insulating material and a preparation method thereof.
The invention adopts the following technical scheme:
the anti-boiling water pine disc type silane crosslinked polyethylene insulating material comprises the following raw materials in parts by weight: (6.2-8.3) forming a high flame-retardant oil-resistant polyvinyl chloride material;
the material A is prepared from the following raw materials in parts by weight:
the material B is prepared from the following raw materials in parts by weight:
the LLDPE resins in the materials A and B have a melt index of (2.0.+ -. 3) g/10min at 190℃and 2.16 kg.
Preferably, the LLDPE resin in the A and B materials is of the type LLDPE DFDA-7042 middlings.
The LDPE resin in the material A has a melt index of (0.85-0.10) g/10min at 190 ℃ and 2.16 kg.
The flame retardant auxiliary agent added into the material A is a rheological agent FR-2, which is produced by Shanghai Kangbang industries, inc.;
the silane added in the material A is vinyl triethoxysilane;
the initiator added in the material A is dicumyl peroxide DCP;
the antioxidant added in the material A is 2,2' -thiobis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate ], namely an antioxidant 1035;
the polymerization inhibitor added into the material A is methyl hydroquinone THQ;
and one or two of the nanometer rubber particle superfine styrene-butadiene rubber and the superfine acrylate rubber are added into the material A.
The catalyst added into the material B is dibutyl tin dilaurate;
the antioxidant added in the material B is 2,2' -thiobis [ ethyl 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ];
and the polymerization inhibitor added into the material B is methyl hydroquinone THQ.
A preparation method of a boiling-resistant tipping disc type silane crosslinked polyethylene insulating material comprises the steps of preparing a material A, preparing a material B, and uniformly mixing the material A and the material B according to a proportion to obtain the boiling-resistant tipping disc type silane crosslinked polyethylene insulating material;
the preparation method of the material A comprises the following steps:
s1-1, drying LLDPE resin and LDPE resin, and then adding a processing flame retardant auxiliary agent according to a proportion and uniformly mixing;
s1-2, adding silane, an initiator, an antioxidant, a polymerization inhibitor and nano rubber particles into the mixture obtained in the step S1-1 according to the proportion under the heating state of the wall of the kneading pot, mixing uniformly, extruding through a double screw, infiltrating through a water tank, bracing and granulating;
s1-3, sequentially carrying out hot air drying and cold air drying on the granules obtained in the step S1-2, and vacuum packaging to obtain a material A;
the preparation method of the material B comprises the following steps:
s2-1, drying LLDPE resin, adding LLDPE resin powder, adding an antioxidant, a catalyst and a polymerization inhibitor according to the proportion, uniformly mixing, extruding through a double screw, infiltrating through a water tank, bracing and granulating;
s2-2, sequentially carrying out hot air drying and cold air drying on the granules obtained in the step S2-1, and packaging to obtain the material B.
In the preparation step S1-1 of the material A and in the preparation step S2-1 of the material B, the drying temperature of the LLDPE resin and the LDPE resin is 80-90 ℃ and the drying time is 1.5-2.5h.
In the preparation step S1-2 of the material A, the heating temperature of the wall of the kneading pot is 45-55 ℃.
In the preparation step S1-2 of the material A, the rotating speed of the high-speed mixing is 475rpm-525rpm, and the mixing time is 2.5-3.5min.
In the preparation step S1-2 of the material A, the temperature of each region during the double-screw extrusion granulation is as follows:
| Ⅰ | Ⅱ | Ⅲ | Ⅳ | Ⅴ | Ⅵ | Ⅶ | Ⅷ | Ⅸ | machine head |
| 148-152 | 118-122 | 158-162 | 158-168 | 158-162 | 158-162 | 178-182 | 188-192 | 198--202 | 228-232 |
In the preparation step S2-1 of the material B, the temperature of each region of the twin-screw extrusion granulation is as follows:
| Ⅰ | Ⅱ | Ⅲ | Ⅳ | Ⅴ | Ⅵ | Ⅶ | Ⅷ | machine head |
| 138～142 | 153～157 | 163～167 | 168～172 | 173～177 | 173～177 | 178～182 | 183～187 | 193～197 |
Preferably, in the preparation step S1-3 of the material A and in the preparation step S2-2 of the material B, the hot air temperature of hot air drying is 70-80 ℃ and the drying time is 0.5-1.5h.
More preferably, the cold air is not heated during the cold air drying, and the drying time is 0.5-1.5h. Because the hot air takes away the moisture, the cold air reduces the material temperature of the granules and further dries the granules, and the moisture in the crosslinked polyethylene insulating materials A and B can be removed thoroughly. The automatic dehumidifying and drying device used in the invention for drying the granules is a drying device of DRF-25Z-KS model of Chuan field mechanical manufacturing (Shanghai) limited company.
Compared with the prior art, the technical scheme of the invention has the following advantages:
A. the anti-boiling water pine disc type silane crosslinked polyethylene insulating material provided by the invention is prepared by mixing the materials at a high speed under the heating state of the wall of a kneading pot, so that an antioxidant can be quickly dissolved in silane, and is in a stretched shape for granulating, and then the material A and the material B are dried.
B. The invention adopts no traditional hot cutting granulation, uses bracing to cut particles through a water tank, is convenient to clean, uses a pot wall heating process when mixed particles are mixed with oil, fully absorbs and uniformly disperses the oil, and adopts hot air drying and then cold air drying when drying, thereby further reducing the water content, reducing the possibility of pre-crosslinking and widening the extrusion process range.
C. The resin powder is added into the catalyst master batch, so that the catalyst and the antioxidant have better dispersing effect, and the anti-boiling water pine disc type silane crosslinked polyethylene insulating material is generated after the catalyst master batch is matched with the material A, and can meet JB/T10437-2004 standard.
D. The boiling-proof tipping disc type silane crosslinked polyethylene insulating material provided by the invention has the excellent characteristics of high extrusion speed, matte extrusion surface and the like.
Detailed Description
This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments 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. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The material A and the material B are prepared according to the following formula (weight parts):
the material A comprises the following components:
and in the material B:
and (3) preparing a material A: drying resin LLDPE DFDA-7042 and LDPE according to the proportion under the condition of 90 ℃ for 2 hours, uniformly mixing with a processing flame retardant auxiliary FR-2, heating to 45 ℃ in a kneading pot, mixing at high speed, simultaneously adding silane LT-171, an initiator DCP, an antioxidant 1035, a polymerization inhibitor methylhydroquinone THQ and nano rubber particle superfine styrene-butadiene rubber, mixing at high speed for 3 minutes, discharging into a double-screw extruder, and the temperature of each region of the screw extruder during extrusion is as follows:
| Ⅰ | Ⅱ | Ⅲ | Ⅳ | Ⅴ | Ⅵ | Ⅶ | Ⅷ | Ⅸ | machine head |
| 150 | 120 | 160 | 160 | 160 | 160 | 180 | 190 | 200 | 230 |
The extruded slivers are subjected to water tank bracing and granulating, then are pumped into a hot air dryer at 70 ℃ for drying for 1 hour, then are pumped into a cold air dryer for drying for 1 hour, and then are subjected to vacuum aluminum plastic composite bag packaging, thus obtaining the composite material.
And (3) preparing a material B: drying LLDPE DFDA-7042 and resin powder at 80 ℃ for 2 hours, uniformly mixing with a catalyst dibutyl tin dilaurate, an antioxidant 1035 and a polymerization inhibitor methyl hydroquinone THQ, and then feeding into a double-screw extruder, wherein the extrusion temperature is as follows:
| heating zone | Ⅰ | Ⅱ | Ⅲ | Ⅳ | Ⅴ | Ⅵ | Ⅶ | Ⅷ | Machine head |
| Temperature (temperature) | 140 | 155 | 165 | 170 | 175 | 175 | 180 | 185 | 195 |
And (3) carrying out bracing and granulating on the extruded strips through a water tank, firstly pumping the granules into a hot air dryer at 70 ℃ for drying for 1 hour, then pumping the granules into a cold air dryer for drying for 1 hour, and then pumping a vacuum aluminum-plastic composite bag for packaging.
Example 2
The material A and the material B are prepared according to the following formula (weight parts):
the material A comprises the following components:
and in the material B:
and (3) preparing a material A: drying resin LLDPE DFDA-7042 and LDPE according to the proportion under the condition of 80 ℃ for 2 hours, uniformly mixing with a processing flame retardant auxiliary FR-2, heating to 50 ℃ in a kneading pot, mixing at high speed, simultaneously adding silane LT-171, an initiator DCP, an antioxidant 1035, a polymerization inhibitor methylhydroquinone THQ and nano rubber particle superfine styrene-butadiene rubber, mixing at high speed for 3 minutes, discharging into a double-screw extruder, and the temperature of each region of the screw extruder during extrusion is as follows:
| Ⅰ | Ⅱ | Ⅲ | Ⅳ | Ⅴ | Ⅵ | Ⅶ | Ⅷ | Ⅸ | machine head |
| 150 | 120 | 160 | 160 | 160 | 160 | 180 | 190 | 200 | 230 |
The extruded slivers are subjected to water tank bracing and granulating, then are pumped into a hot air dryer at 80 ℃ for drying for 1 hour, then are pumped into a cold air dryer for drying for 1 hour, and then are subjected to vacuum aluminum plastic composite bag packaging, thus obtaining the composite material.
And (3) preparing a material B: drying LLDPE DFDA-7042 and resin powder at 90 ℃ for 2 hours, uniformly mixing with a catalyst dibutyl tin dilaurate, an antioxidant 1035 and a polymerization inhibitor methyl hydroquinone THQ, and then feeding into a double-screw extruder, wherein the extrusion temperature is as follows:
| heating zone | Ⅰ | Ⅱ | Ⅲ | Ⅳ | Ⅴ | Ⅵ | Ⅶ | Ⅷ | Machine head |
| Temperature (temperature) | 140 | 155 | 165 | 170 | 175 | 175 | 180 | 185 | 195 |
The extruded slivers are subjected to water tank bracing and granulating, the granules are pumped into a hot air dryer at 80 ℃ for drying for 1 hour, then pumped into a cold air dryer for drying for 1 hour, and then pumped into a vacuum aluminum plastic composite bag for packaging, thus obtaining the aluminum plastic composite bag.
Example 3
The material A and the material B are prepared according to the following formula (weight parts):
the material A comprises the following components:
and in the material B:
and (3) preparing a material A: drying resin LLDPE DFDA-7042 and LDPE according to the proportion under the condition of 90 ℃ for 2 hours, uniformly mixing with a processing flame retardant auxiliary FR-2, heating to 55 ℃ in a kneading pot, mixing at high speed, simultaneously adding silane LT-171, an initiator DCP, an antioxidant 1035, a polymerization inhibitor methylhydroquinone THQ and nano rubber particle superfine styrene-butadiene rubber, mixing at high speed for 3 minutes, discharging into a double-screw extruder, and the temperature of each region of the screw extruder during extrusion is as follows:
the extruded slivers are subjected to water tank bracing and granulating, then are pumped into a hot air dryer at 80 ℃ for drying for 1 hour, then are pumped into a cold air dryer for drying for 1 hour, and then are subjected to vacuum aluminum plastic composite bag packaging, thus obtaining the composite material.
And (3) preparing a material B: drying LLDPE DFDA-7042 and resin powder at 90 ℃ for 2 hours, uniformly mixing with a catalyst dibutyl tin dilaurate, an antioxidant 1035 and a polymerization inhibitor methyl hydroquinone THQ, and then feeding into a double-screw extruder, wherein the extrusion temperature is as follows:
| heating zone | Ⅰ | Ⅱ | Ⅲ | Ⅳ | Ⅴ | Ⅵ | Ⅶ | Ⅷ | Machine head |
| Temperature (temperature) | 140 | 155 | 165 | 170 | 175 | 175 | 180 | 185 | 195 |
And (3) carrying out bracing and granulating on the extruded strips through a water tank, firstly pumping the granules into a hot air dryer at 70 ℃ for drying for 1 hour, then pumping the granules into a cold air dryer for drying for 1 hour, and then pumping a vacuum aluminum-plastic composite bag for packaging.
Comparative example
Materials a and B (no initiator and polymerization inhibitor in material a, no LLDPE resin powder in material B, as compared to example 1) were prepared according to the following formulation (parts by weight):
the material A comprises the following components:
and in the material B:
and (3) preparing a material A: drying resin LLDPE DFDA-7042 and LDPE at 90 ℃ for 2h according to the proportion, uniformly mixing with a processing flame retardant auxiliary FR-2, heating to 45 ℃ in a kneading pot, mixing at high speed, adding silane LT-171, antioxidant 1035 and nano rubber particle superfine styrene-butadiene rubber, mixing at high speed for 3min, and discharging into a double-screw extruder, wherein the temperature of each region of the screw extruder during extrusion is as follows:
| Ⅰ | Ⅱ | Ⅲ | Ⅳ | Ⅴ | Ⅵ | Ⅶ | Ⅷ | Ⅸ | machine head |
| 150 | 120 | 160 | 160 | 160 | 160 | 180 | 190 | 200 | 230 |
The extruded slivers are subjected to water tank bracing and granulating, then are pumped into a hot air dryer at 70 ℃ for drying for 1 hour, then are pumped into a cold air dryer for drying for 1 hour, and then are subjected to vacuum aluminum plastic composite bag packaging, thus obtaining the composite material.
And (3) preparing a material B: drying LLDPE DFDA-7042 at 80 ℃ for 2 hours, uniformly mixing with a catalyst dibutyl tin dilaurate, an antioxidant 1035 and a polymerization inhibitor methyl hydroquinone THQ, and then feeding into a double-screw extruder, wherein the extrusion temperature is as follows:
| heating zone | Ⅰ | Ⅱ | Ⅲ | Ⅳ | Ⅴ | Ⅵ | Ⅶ | Ⅷ | Machine head |
| Temperature (temperature) | 140 | 155 | 165 | 170 | 175 | 175 | 180 | 185 | 195 |
And (3) carrying out bracing and granulating on the extruded strips through a water tank, firstly pumping the granules into a hot air dryer at 70 ℃ for drying for 1 hour, then pumping the granules into a cold air dryer for drying for 1 hour, and then pumping a vacuum aluminum-plastic composite bag for packaging.
The materials A and B prepared in examples 1 to 3 and comparative examples were prepared according to 93:7, extruding the wires on a phi 70 machine, and respectively performing performance tests on the wires obtained in examples 1-3 and comparative examples, wherein the performance data are shown in the performance test results in table 1.
TABLE 1 results of Performance test of the products prepared in example 1, comparative examples 1-3
From the performance data of Table 1 and the surface observations of the process test site, the surfaces of examples 1-3 are matte, the data are quite good, and the loose disc can meet the requirements; some of the data for the comparative examples failed to meet the performance exhibited by the material of example 1, and in particular the loose disc failed to meet the specifications.
In summary, the anti-boiling water pine disc type silane crosslinked polyethylene insulating material provided by the invention is prepared by mixing the materials at a high speed under the heating state of the wall of a kneading pot, so that an antioxidant can be quickly dissolved in silane, and is stretched and granulated, and then the material A and the material B are dried.
The invention adopts no traditional hot cutting granulation, uses bracing to cut particles through a water tank, is convenient to clean, uses a pot wall heating process when mixed particles are mixed with oil, fully absorbs and uniformly disperses the oil, and adopts hot air drying and then cold air drying when drying, thereby further reducing the water content, reducing the possibility of pre-crosslinking and widening the extrusion process range.
The invention is applicable to the prior art where nothing is said.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While obvious variations or modifications are contemplated as falling within the scope of the present invention.
Claims (9)
1. The boiling-proof tipping disc type silane crosslinked polyethylene insulating material is characterized in that the insulating material is prepared from the following raw materials in parts by weight: (6.2-8.3) forming a high flame-retardant oil-resistant polyvinyl chloride material;
the material A is prepared from the following raw materials in parts by weight:
the material B is prepared from the following raw materials in parts by weight:
2. the boil-proof pan type silane crosslinked polyethylene insulation according to claim 1, wherein the LLDPE resin in the A and B materials has a melt index of (2.0.+ -. 3) g/10min at 190 ℃ and 2.16 kg;
the LDPE resin in the material A has a melt index of (0.85-0.10) g/10min at 190 ℃ and 2.16 kg.
3. The anti-boiling water pine disc type silane crosslinked polyethylene insulation material according to claim 1, wherein the flame retardant auxiliary agent added in the material A is a rheological agent FR-2;
the added silane is vinyl triethoxysilane;
the initiator is dicumyl peroxide DCP;
the added antioxidant is 2,2' -thiobis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate ];
the added polymerization inhibitor is methyl hydroquinone THQ;
one or two of added nanometer rubber particle superfine styrene-butadiene rubber and superfine acrylate rubber.
4. The anti-boiling water pine disc type silane crosslinked polyethylene insulation material according to claim 1, wherein the catalyst added in the material B is dibutyl tin dilaurate;
the added antioxidant is 2,2' -thiobis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate ];
the added polymerization inhibitor is methyl hydroquinone THQ.
5. A method for preparing the anti-boiling water pine disc type silane crosslinked polyethylene insulating material according to any one of claims 1 to 4, which is characterized by comprising the steps of preparing a material A, preparing a material B and uniformly mixing the material A and the material B according to a proportion to obtain the anti-boiling water pine disc type silane crosslinked polyethylene insulating material;
the preparation method of the material A comprises the following steps:
s1-1, drying LLDPE resin and LDPE resin, and then adding a processing flame retardant auxiliary agent according to a proportion and uniformly mixing;
s1-2, adding silane, an initiator, an antioxidant, a polymerization inhibitor and nano rubber particles into the mixture obtained in the step S1-1 according to the proportion under the heating state of the wall of the kneading pot, mixing uniformly, extruding through a double screw, infiltrating through a water tank, bracing and granulating;
s1-3, sequentially carrying out hot air drying and cold air drying on the granules obtained in the step S1-2, and vacuum packaging to obtain a material A;
the preparation method of the material B comprises the following steps:
s2-1, drying LLDPE resin, adding LLDPE resin powder, adding an antioxidant, a catalyst and a polymerization inhibitor according to the proportion, uniformly mixing, extruding through a double screw, infiltrating through a water tank, bracing and granulating;
s2-2, sequentially carrying out hot air drying and cold air drying on the granules obtained in the step S2-1, and packaging to obtain the material B.
6. The process according to claim 5, wherein the LLDPE resin and LDPE resin are dried at a temperature of 80 to 90℃in the step S1-1 for the preparation of the A material and in the step S2-1 for the preparation of the B material.
7. The preparation method according to claim 5, wherein in the preparation step S1-2 of the material A, the heating temperature of the kneading pot wall is 45-55 ℃.
8. The method according to claim 5, wherein in the step S1-2 of preparing the material A, the temperature of each zone during the twin-screw extrusion granulation is as follows:
9. The method according to claim 5, wherein in the step S2-1 of preparing the material B, the temperature of each zone of the twin-screw extrusion granulation is:
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