CN104816399B - A kind of electric wire silane crosslinked polyethylene plastic - Google Patents
A kind of electric wire silane crosslinked polyethylene plastic Download PDFInfo
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- CN104816399B CN104816399B CN201510193290.0A CN201510193290A CN104816399B CN 104816399 B CN104816399 B CN 104816399B CN 201510193290 A CN201510193290 A CN 201510193290A CN 104816399 B CN104816399 B CN 104816399B
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- screw extruder
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- 229920003023 plastic Polymers 0.000 title claims abstract description 29
- 239000004033 plastic Substances 0.000 title claims abstract description 29
- 239000004718 silane crosslinked polyethylene Substances 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 128
- 238000004132 cross linking Methods 0.000 claims abstract description 40
- 238000002156 mixing Methods 0.000 claims abstract description 23
- 239000003999 initiator Substances 0.000 claims abstract description 18
- 239000003054 catalyst Substances 0.000 claims abstract description 17
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910000077 silane Inorganic materials 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 13
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 239000003638 chemical reducing agent Substances 0.000 claims description 19
- 230000007246 mechanism Effects 0.000 claims description 18
- -1 3, 5-di-t-butyl-4-hydroxyphenyl Chemical group 0.000 claims description 17
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- 229920001684 low density polyethylene Polymers 0.000 claims description 14
- 239000004702 low-density polyethylene Substances 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 10
- 238000009826 distribution Methods 0.000 claims description 10
- 238000009461 vacuum packaging Methods 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 7
- XOUQAVYLRNOXDO-UHFFFAOYSA-N 2-tert-butyl-5-methylphenol Chemical compound CC1=CC=C(C(C)(C)C)C(O)=C1 XOUQAVYLRNOXDO-UHFFFAOYSA-N 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 5
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 4
- 238000005485 electric heating Methods 0.000 claims description 4
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 4
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 4
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 claims description 4
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 230000036346 tooth eruption Effects 0.000 claims description 3
- HGXJDMCMYLEZMJ-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOOC(=O)C(C)(C)C HGXJDMCMYLEZMJ-UHFFFAOYSA-N 0.000 claims description 2
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 2
- QIAUSMTXWZCKOF-UHFFFAOYSA-N 2,4,4-trimethylpentyl 7,7-dimethyloctaneperoxoate Chemical compound CC(C)(C)CC(C)COOC(=O)CCCCCC(C)(C)C QIAUSMTXWZCKOF-UHFFFAOYSA-N 0.000 claims description 2
- IKEHOXWJQXIQAG-UHFFFAOYSA-N 2-tert-butyl-4-methylphenol Chemical compound CC1=CC=C(O)C(C(C)(C)C)=C1 IKEHOXWJQXIQAG-UHFFFAOYSA-N 0.000 claims description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims description 2
- KEQFTVQCIQJIQW-UHFFFAOYSA-N N-Phenyl-2-naphthylamine Chemical compound C=1C=C2C=CC=CC2=CC=1NC1=CC=CC=C1 KEQFTVQCIQJIQW-UHFFFAOYSA-N 0.000 claims description 2
- NOZAQBYNLKNDRT-UHFFFAOYSA-N [diacetyloxy(ethenyl)silyl] acetate Chemical compound CC(=O)O[Si](OC(C)=O)(OC(C)=O)C=C NOZAQBYNLKNDRT-UHFFFAOYSA-N 0.000 claims description 2
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexamethylene diamine Natural products NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 claims description 2
- 150000002978 peroxides Chemical class 0.000 claims description 2
- 230000003020 moisturizing effect Effects 0.000 claims 2
- UUPWEGAONCOIFJ-UHFFFAOYSA-N CCCCC(CC)COC(=O)OOC(O)=O Chemical compound CCCCC(CC)COC(=O)OOC(O)=O UUPWEGAONCOIFJ-UHFFFAOYSA-N 0.000 claims 1
- VNBLTKHUCJLFSB-UHFFFAOYSA-N n-(trimethoxysilylmethyl)aniline Chemical compound CO[Si](OC)(OC)CNC1=CC=CC=C1 VNBLTKHUCJLFSB-UHFFFAOYSA-N 0.000 claims 1
- DOIRQSBPFJWKBE-UHFFFAOYSA-N phthalic acid di-n-butyl ester Natural products CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 9
- 238000010276 construction Methods 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000000376 reactant Substances 0.000 description 12
- 239000004698 Polyethylene Substances 0.000 description 9
- 230000006872 improvement Effects 0.000 description 9
- 229920000573 polyethylene Polymers 0.000 description 9
- YVGHBZYFOACQBD-UHFFFAOYSA-N ethoxycarbonyloxy hexyl carbonate Chemical compound CCCCCCOC(=O)OOC(=O)OCC YVGHBZYFOACQBD-UHFFFAOYSA-N 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- HXIQYSLFEXIOAV-UHFFFAOYSA-N 2-tert-butyl-4-(5-tert-butyl-4-hydroxy-2-methylphenyl)sulfanyl-5-methylphenol Chemical compound CC1=CC(O)=C(C(C)(C)C)C=C1SC1=CC(C(C)(C)C)=C(O)C=C1C HXIQYSLFEXIOAV-UHFFFAOYSA-N 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006353 environmental stress Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- OKOBUGCCXMIKDM-UHFFFAOYSA-N Irganox 1098 Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)NCCCCCCNC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 OKOBUGCCXMIKDM-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- KRJRKEPWQOASJN-UHFFFAOYSA-N aniline;trimethoxy(methyl)silane Chemical compound NC1=CC=CC=C1.CO[Si](C)(OC)OC KRJRKEPWQOASJN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- 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
- B29B9/16—Auxiliary treatment of granules
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/76—Venting, drying means; Degassing means
- B29C48/768—Venting, drying means; Degassing means outside the apparatus, e.g. after the die
-
- 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
- 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
-
- 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
- C08L51/08—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 macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92952—Drive section, e.g. gearbox, motor or drive fluids
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The present invention relates to a kind of electric wire silane crosslinked polyethylene plastic, described raw material composition in terms of weight fraction includes: ldpe resin is 100 parts, and silane coupler is 0.5 5 parts, and initiator is 0.2 2 parts, antioxidant is 0.3 3 parts, and catalyst is 0.2 1 parts；Described preparation method is two step method, expect including preparation A material and B, and A material and B material mix, A material is Silane Grafted material, B material is catalyst masterbatch, proportionally, crosslinking mixing in steam crosslinking device after A material and B material are mixed in single screw extrusion machine, extrude, i.e. obtain silane crosslinked polyethylene plastic；The present invention has the advantages such as simple in construction, safe and reliable, easy to use, low cost, production efficiency high, saves energy and reduce the cost.
Description
Technical Field
The invention relates to polyethylene insulation plastic used for an insulation layer and a guide pipe of a wire and a cable, in particular to production equipment and a method of silane crosslinked polyethylene plastic for the wire and the cable.
Background
The polyethylene has good mechanical property, electrical property, chemical corrosion resistance, sanitation and forming processing property, and can be selected as a building water supply pipe material. However, polyethylene is required to be modified by crosslinking because it is difficult to satisfy the requirements of the hot water supply pipe for construction, such as heat resistance, environmental stress cracking resistance, weather resistance, oil resistance, and creep resistance. The polyethylene may be crosslinked by physical or chemical means. After polyethylene is crosslinked, macromolecules are converted into a three-dimensional network structure from a linear structure to form a multiphase system with a crystalline structure, an amorphous structure and a crosslinked structure, the crystalline structure has higher strength, rigidity, compactness and barrier property, the amorphous structure has toughness, and the crosslinked structure endows the product with various special properties such as high-temperature elasticity, heat resistance, insolubility, infusibility, environmental stress cracking resistance, oil and solvent resistance, flame retardance, barrier property and the like. Therefore, the crosslinked polyethylene pipe is a new product with high technical content and high added value, which has very complex molecular structure and aggregation structure and very excellent comprehensive performance.
In the traditional silane modification process, the silane modification process is complex, the production time of a silane cable is long, the production cost is high, the production efficiency is low, silane crosslinking is mainly performed in warm water in the silane reaction, and after plastics are contacted with water, the water permeation can directly influence the crosslinking speed and the quality of a cable product, so that the reaction time needs to be strictly controlled.
Disclosure of Invention
The invention aims to provide production equipment and a production method of silane crosslinked polyethylene plastic for wires and cables, which have the advantages of simple structure, safety, reliability, convenience in use, low cost, high production efficiency, energy conservation, consumption reduction and the like.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a production facility of silane crosslinked polyethylene plastics for wire and cable which characterized in that: comprises an automatic metering device, a high-speed mixer, a spiral feeding machine, a single-screw extruder, a vacuum negative pressure remover, a drying tower, a steam cross-linking device and a storage barrel; wherein,
the high-speed mixer comprises a pot cover, a guide plate, a base, a first power mechanism arranged in the base and a charging barrel arranged on the base, wherein a rotating impeller is arranged at the lower end of the charging barrel and connected with the first power mechanism, a pot cover is arranged on the charging barrel, a locking device is arranged on the pot cover, the pot cover is connected with the charging barrel through the locking device, and a blowing device is arranged on the pot cover; a jacket is arranged inside the charging barrel, a guide plate is arranged on one side inside the jacket, uniformly distributed cutting teeth are arranged on the other side inside the jacket, a first discharging port is arranged at the bottom of the charging barrel, a cover plate is arranged at the first discharging port, and a blowing device is arranged on the cover plate;
the single-screw extruder comprises a rotation control mechanism, a feeding device, a single-screw extruder barrel, a base, an oil temperature machine and an oil cylinder, wherein the feeding device is arranged above the single-screw extruder barrel; a machine barrel is arranged in the single-screw extruder barrel, and a screw is arranged in the machine barrel; a second discharge hole is formed in the right end of the single-screw extruder barrel; the lower end of the single-screw extruder barrel is provided with a drain pipe, and the rotation control mechanism and the single-screw extruder barrel are both fixed on the base; the screw comprises three sections, namely a conveying section, a melting section and a metering section from left to right in sequence;
the vacuum negative pressure remover comprises a motor, a speed reducer, a chain wheel, a fixed shaft, a rotary joint, a first material cylinder, a second material cylinder, a third material cylinder and a vacuum device, wherein the motor is connected with the speed reducer, the speed reducer is connected with the rotary joint through the chain wheel, the rotary joint is connected with the first material cylinder, the first material cylinder is connected with the second material cylinder through the rotary joint, the fixed shaft and the rotary joint in sequence, the second material cylinder is connected with the third material cylinder through the rotary joint, the fixed shaft and the rotary joint in sequence, a stainless steel inner wall, a heating jacket, an iron plate and a stainless steel outer wall are sequentially arranged in the first material cylinder from inside to outside, heat conducting oil is arranged in the heating jacket, a resistance heating sheet or an electric heating wire is arranged in the iron plate heat-insulating layer, the second material cylinder is connected with the vacuum device, and the vacuum device, the vacuum tube is provided with a vacuum meter and a filter, and the first material cylinder, the second material cylinder and the third material cylinder are connected through connecting tubes;
the automatic metering device is sequentially connected with the high-speed mixer, the spiral feeding machine, the single-screw extruder, the vacuum negative-pressure remover, the drying tower, the single-screw extruder, the steam cross-linking device and the storage barrel.
As an improvement of the invention, the steam crosslinking device comprises a water tank, a water replenishing pump, a water pump, a steam heat generator, a reheater, a steam crosslinking box, a filter and a condenser, wherein the water replenishing pump is connected with the water tank, the water tank is connected with the steam generator through the water pump, the steam generator is connected with the steam crosslinking box through the reheater, an exhaust pipe is arranged at the lower end of the steam crosslinking box, and the exhaust pipe is connected with the water tank sequentially through the filter and the condenser.
As an improvement of the invention, a heater and a cooler are arranged in the oil temperature machine.
As an improvement of the invention, a thermometer and an oil pump are also arranged in the oil temperature machine, and the oil temperature machine is connected with the oil cylinder through the oil pump.
As an improvement of the invention, the rotation control mechanism comprises a motor, a linkage shaft, a speed reducer and a power distribution box, wherein the motor is connected with the speed reducer through the linkage shaft, the speed reducer is connected with the power distribution box, and the screw is connected with the power distribution box; the first power mechanism comprises a motor, a driven wheel and a driving wheel fixed on the motor, the driving wheel and the driven wheel are connected through a conveying belt sleeve, and the driven wheel is connected with a rotating impeller.
As an improvement of the invention, the plastic comprises the following components in parts by weight: 100 parts of low-density polyethylene resin, 0.5-5 parts of silane coupling agent, 0.2-2 parts of initiator, 0.3-3 parts of antioxidant and 0.2-1 part of catalyst; the preparation method is a two-step method and comprises the steps of preparing a material A and a material B, mixing the material A and the material B, wherein the material A is a silane grafting material, and the material B is a catalyst master batch, and the preparation method comprises the following steps:
preparation of material A: processing and drying low-density polyethylene resin until the moisture content is below 500PPm, then weighing the low-density polyethylene resin, a silane coupling agent and an initiator according to corresponding adding proportions by an automatic metering device, feeding the materials into a single-screw extruder for mixing, plasticizing and high-temperature reaction, removing the moisture and volatile substances by a vacuum negative pressure remover, cooling and granulating, drying by a drying tower, and storing the dried materials in a vacuum packaging bag;
preparing a material B, namely premixing the low-density polyethylene resin, the silane coupling agent, the initiator, the antioxidant and the catalyst raw material in a high-speed mixer according to corresponding addition proportions, mixing, plasticizing and melt-extruding in a single-screw extruder, removing moisture and volatile substances through a vacuum negative pressure remover, cooling and granulating, drying through a drying tower, and storing the dried material in a vacuum packaging bag;
and (3) mixing the material A and the material B in a single-screw extruder according to the proportion, extruding, and then crosslinking and mixing in a steam crosslinking device to obtain the silane crosslinked polyethylene plastic.
As an improvement of the invention, the silane coupling agent is one or more of vinyl triacetoxysilane, gamma-glycidylpropyltrimethoxysilane, vinyl trimethoxysilane, vinyl triethoxysilane, vinyl-tris- (2-methoxyethoxy) silane, gamma-aminopropyltriethoxysilane or aniline methyl trimethoxysilane.
As an improvement of the invention, the antioxidant is N, N-diphenyl p-aniline, N-phenyl-N' -cyclohexane p-aniline, phenyl-beta-naphthylamine, N-N-di-beta-naphthyl p-phenylenediamine, 2, 6-di-tert-butyl-4-cresol, one or more of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], 2 '-methylenebis (4-methyl-6-tert-butylphenol), 4' -thiobis- (6-tert-butyl-3-methylphenol), 4 '-thiobis (6-tert-butyl-m-cresol) or N, N' -bis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl ] hexamethylenediamine.
As an improvement of the invention, the initiator is one or more of (2-ethyl) hexyl peroxydicarbonate, cumyl peroxyneodecanoate, di (2-ethyl) hexyl peroxydicarbonate, 2,4, 4-trimethylpentyl peroxyneodecanoate, di-3, 5, 5-trimethylacetyl peroxide or tert-butyl peroxypivalate.
As an improvement of the invention, the weight ratio of the material A to the material B is as follows: a material: material B is 95-97: 7-3.
Compared with the prior art, the invention has the following beneficial effects because the technology is adopted:
1) the silane crosslinking method used in the invention is simple, the equipment investment is small, the operation and the control are easy, the production efficiency is high, and the cost is low;
2) the invention basically overcomes the difficulty that the polyethylene is difficult to extrude and form due to the early crosslinking, and the operation freedom degree is obviously improved;
3) the invention effectively solves the problem of high shrinkage rate of the cross-linked molded product, the size and the shape of the produced product are easy to maintain, and the internal stress of the molded product can be eliminated in the heat cross-linking process;
4) the screw core part is provided with the oil inlet pipe, the oil inlet pipe is provided with the oil inlet and the oil outlet, the oil inlet is connected with the oil temperature machine, the oil outlet is connected with the oil cylinder, and the heater and the cooler are arranged in the oil temperature machine, so that the temperature of the screw can be controlled in time;
5) the process used by the invention has strong universality, is suitable for polyethylene with all densities and is also suitable for most of polyethylene with fillers, and the produced polyethylene has high insulativity, good aging resistance and long service life;
6) the vacuum negative pressure remover is arranged in the invention, and can remove volatile substances such as air, moisture and the like in the material by using vacuum;
7) the vacuum negative pressure remover and the drying tower are arranged in the invention, so that the material can be dehydrated for the second time, and the material can be prevented from containing bubbles due to excessive moisture content.
Drawings
FIG. 1 is a schematic structural diagram of a production facility for silane crosslinked polyethylene plastic for electric wires and cables;
FIG. 2 is a schematic diagram of the construction of the high speed mixer of FIG. 1;
FIG. 3 is a schematic view of the construction of the single screw extruder of FIG. 1;
FIG. 4 is a schematic view of the vacuum extractor of FIG. 1;
FIG. 5 is a schematic view of the structure of the steam crosslinking apparatus in FIG. 1;
in the figure: 1. an automatic metering device, 2, a high-speed mixer, 3, a spiral feeder, 4, a single-screw extruder, 5, a vacuum negative pressure remover, 6, a drying tower, 7, a steam cross-linking device, 8, a storage barrel, 9, a pot cover, 10, a guide plate, 11, a charging barrel, 12, a rotary impeller, 13, a base, 14, a locking device, 15, a feeding device, 16, a single-screw extruder barrel, 17, a machine base, 18, an oil temperature machine, 19, an oil cylinder, 20, a screw, 21, a machine barrel, 22, an oil inlet pipe, 23, an oil inlet, 24, an oil outlet, 25, a heater, 26, a cooler, 27, a thermometer, 28, an oil pump, 29, a motor, 30, a linkage shaft, 31, a speed reducer, 32, a power distribution box, 33, a driving wheel, 34, a driven wheel, 35, a chain wheel, 36, a fixed shaft, 37, a rotary joint, 38, a first charging barrel, 39, a second charging barrel, 41. the system comprises a stainless steel inner wall, 42, a heating jacket, 43, an iron plate heat-insulating layer, 44, a stainless steel outer wall, 45, a vacuum generating device, 46, a vacuum pipe, 47, a vacuum meter, 48, a filter, 49, a drain pipe, 50, a water tank, 51, a water replenishing pump, 52, a water pump, 53, a steam heat generator, 54, a reheater, 55, a steam cross-linking box, 56, a filter, 57 and a condenser.
Detailed Description
The invention is further elucidated with reference to the drawings and the detailed description.
Example 1:
the attached drawing shows that the production equipment of the silane crosslinked polyethylene plastic for the electric wire and the cable comprises an automatic metering device 1, a high-speed mixer 2, a spiral feeding machine 3, a single-screw extruder 4, a vacuum negative pressure remover 5, a drying tower 6, a steam crosslinking device 7 and a storage barrel 8;
the high-speed mixer 2 comprises a pot cover 9, a guide plate 10, a base 13, a first power mechanism arranged in the base 13 and a charging barrel 11 arranged on the base 13, wherein a rotating impeller 12 is arranged at the lower end of the charging barrel 11, the rotating impeller 12 is connected with the first power mechanism, the pot cover 9 is arranged on the charging barrel 11, a locking device 14 is arranged on the pot cover 9, the pot cover 9 is connected with the charging barrel 11 through the locking device 14, and a blowing device is arranged on the pot cover 9; a jacket is arranged in the charging barrel 11, a guide plate 10 is arranged on one side in the jacket, uniformly distributed cutting teeth are arranged on the other side in the jacket, a first discharging port is arranged at the bottom of the charging barrel 11, a cover plate is arranged at the first discharging port, and a blowing device is arranged on the cover plate;
the single-screw extruder 4 comprises a rotation control mechanism, a feeding device 15, a single-screw extruder barrel 16, a base 17, an oil temperature machine 18 and an oil cylinder 19, wherein the feeding device 15 is arranged above the single-screw extruder barrel 16; a cylinder 21 is arranged in the cylinder 16 of the single-screw extruder, and a screw 20 is arranged in the cylinder 21; a second discharge hole is formed in the right end of the single-screw extruder barrel 16; the lower end of the single-screw extruder barrel is provided with a drain pipe 49, and the rotation control mechanism and the single-screw extruder barrel 16 are both fixed on the base 17; an oil inlet pipe is arranged at the core part of the screw 20, the oil inlet pipe is provided with an oil inlet 24 and an oil outlet 24, the oil inlet 23 is connected with the oil temperature machine 18, the oil outlet 24 is connected with the oil cylinder 19, and the screw 20 comprises three sections, namely a conveying section, a melting section and a metering section which are arranged from left to right in sequence;
the vacuum negative pressure remover 5 comprises a motor 29, a speed reducer 31, a chain wheel 35, a fixed shaft 36, a rotary joint 37, a first material cylinder 38, a second material cylinder 39, a third material cylinder 40 and a vacuum device, wherein the motor 29 is connected with the speed reducer 31, the speed reducer 31 is connected with the rotary joint 37 through the chain wheel 35, the rotary joint 37 is connected with the first material cylinder 38, the first material cylinder 38 is sequentially connected with the second material cylinder 39 through the rotary joint 37, the fixed shaft 36 and the rotary joint 37, the second material cylinder 39 is sequentially connected with the third material cylinder 40 through the rotary joint 37, the first material cylinder 38 is sequentially provided with a stainless steel inner wall 41, a heating jacket 42, an iron plate heat-insulating layer 43 and a stainless steel outer wall 44 from inside to outside, heat-conducting oil is arranged in the heating jacket 42, a resistance heating sheet or an electric heating wire is arranged in the iron plate heat-insulating layer 43, the second material cylinder 39 is connected with the vacuum device, the vacuum device comprises a vacuum, the vacuum tube 46 is provided with a vacuum meter 47 and a filter 48, and the first charging barrel 38, the second charging barrel 39 and the third charging barrel 40 are connected through connecting tubes;
the automatic metering device 1 is sequentially connected with a high-speed mixer 2, a spiral feeding machine 3, a single-screw extruder 4, a vacuum negative pressure remover 5, a drying tower 6, the single-screw extruder 4, a steam crosslinking device 7 and a storage vat 8, a heater 25 and a cooler 26 are arranged inside the oil temperature machine 18, a thermometer 27 and an oil pump 28 are further arranged inside the oil temperature machine 18, and the oil temperature machine 18 is connected with the oil cylinder 19 through the oil pump 28.
The steam crosslinking device comprises a water tank 50, a water replenishing pump 51, a water pump 52, a steam heat generator 53, a reheater 54, a steam crosslinking box 55, a filter 56 and a condenser 57, wherein the water replenishing pump 51 is connected with the water tank 50, the water tank 50 is connected with the steam generator 53 through the water pump 52, the steam generator 53 is connected with the steam crosslinking box 55 through the reheater 54, an exhaust pipe is arranged at the lower end of the steam crosslinking box 55, and the exhaust pipe is connected with the water tank 50 sequentially through the filter 56 and the condenser 57. The reheater 54 is arranged between the steam generator 53 and the steam crosslinking box 55, so that the heated steam can be heated for the second time, the loss of the steam generated in the process of flowing in a pipeline is avoided, the heating efficiency of the equipment is improved, and the waste of heat is reduced.
The heater 25 and the cooler 26 are arranged in the oil temperature machine 18, the thermometer 27 and the oil pump 28 are further arranged in the oil temperature machine 18, and the oil temperature machine 18 is connected with the oil cylinder 19 through the oil pump 28.
The rotation control mechanism comprises a motor 29, a linkage shaft 30, a speed reducer 31 and a power distribution box 32, wherein the motor 29 is connected with the speed reducer 31 through the linkage shaft 30, the speed reducer 31 is connected with the power distribution box 32, and the screw 20 is connected with the power distribution box 32. The first power mechanism comprises a motor 29, a driven wheel 34 and a driving wheel 33 fixed on the motor 29, the driving wheel 33 and the driven wheel 34 are connected through a conveyor belt sleeve, and the driven wheel 34 is connected with the rotating impeller 12.
The working steps of the vacuum negative pressure remover 5 are as follows:
starting the vacuum negative pressure remover 5, opening a vacuum device in the second material cylinder 39, vacuumizing the second material cylinder 39, extruding materials by the single-screw extruder 4, feeding the materials into the first material cylinder 38 of the vacuum negative pressure remover 5, heating heat-conducting oil in a heating jacket 42 in the first material cylinder 38 after the first material cylinder 38 is filled, heating a resistance heating sheet and an electric heating wire in an iron plate heat-insulating layer 43, feeding the materials into the second material cylinder 39 which is vacuumized when the materials reach a drying temperature, feeding the materials into the third material cylinder 40 after moisture in the materials is fully evaporated, and then feeding the materials into the drying tower 6 for secondary drying.
The preparation method of the silane crosslinked polyethylene plastic comprises the following steps:
taking 95 parts of low-density polyethylene resin, processing and drying to the moisture content of below 500PPm, then taking 0.5 part of silane coupling agent and 0.2 part of initiator, weighing by an automatic metering device 1, sending the materials into a single-screw extruder 4 through a spiral feeding machine 3, mixing, plasticizing, reacting at high temperature, removing the moisture and volatile substances of an extrudate through a vacuum negative pressure remover 5, cooling and granulating the reactant, drying by a drying tower 6, and storing the dried material in a vacuum packaging bag to obtain a silane grafting material A:
weighing 5 parts of low-density polyethylene resin, 0.5 part of silane coupling agent, 0.2 part of initiator, 0.3 part of antioxidant and 0.2 part of catalyst by an automatic metering device 1, then placing the weighed materials in a high-speed mixer 2 for premixing, sending reactants into a single-screw extruder 4 by a spiral feeding machine 3 for mixing, plasticizing and melt extrusion, leading the extrudate to pass through a vacuum negative pressure remover 5, removing moisture and volatile substances, then cooling and granulating the reactants, drying the reactants by a drying tower 6, and storing the dried materials in a vacuum packaging bag to obtain a catalyst master batch B;
the weight ratio of the material A to the material B is material A: material B is 95: 5, mixing the silane grafting material A and the catalyst master batch B in a single-screw extruder 4, extruding, and then crosslinking and mixing in a steam crosslinking device 7 to obtain the silane crosslinked polyethylene plastic, wherein the test results are shown in Table 1 by adopting JB/T10260-2001 standard.
The silane coupling agent is a mixture of vinyltrimethoxysilane and vinyltriethoxysilane.
The antioxidant is a mixture of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and 4, 4' -thiobis- (6-tert-butyl-3-methylphenol).
The initiator is a mixture of (2-ethyl) hexyl peroxydicarbonate and cumyl peroxyneodecanoate.
Example 2:
the apparatus for producing the silane crosslinked polyethylene plastic for electric wire and cable is the same as in example 1.
The preparation method of the silane crosslinked polyethylene plastic comprises the following steps:
taking 98 parts of low-density polyethylene resin, processing and drying to the moisture content of below 500PPm, then taking 0.6 part of silane coupling agent and 0.5 part of initiator, weighing by an automatic metering device 1, sending the materials into a single-screw extruder 4 through a spiral feeding machine 3, mixing, plasticizing, reacting at high temperature, removing the moisture and volatile substances of an extrudate through a vacuum negative pressure remover 5, cooling and granulating the reactant, drying by a drying tower 6, and storing the dried material in a vacuum packaging bag to obtain a silane grafting material A:
weighing 2 parts of low-density polyethylene resin, 2 parts of silane coupling agent, 2 parts of initiator, 0.3 part of antioxidant and 1 part of catalyst by an automatic metering device 1, then placing the weighed materials in a high-speed mixer 2 for premixing, sending reactants into a single-screw extruder 4 by a spiral feeding machine 3 for mixing, plasticizing and melt extrusion, pumping moisture and volatile substances out of the extrudate by a vacuum negative pressure remover 5, then cooling and granulating the reactants, drying the reactants by a drying tower 6, and storing the dried materials in a vacuum packaging bag to obtain a catalyst master batch B;
the weight ratio of the material A to the material B is material A: material B is 97: 7, mixing the silane grafting material A and the catalyst master batch B in a single screw extruder 4, extruding, and then crosslinking and mixing in a steam crosslinking device 7 to obtain the silane crosslinked polyethylene plastic, wherein the test results are shown in Table 1 by adopting JB/T10260-2001 standard.
The silane coupling agent is vinyl trimethoxy silane or vinyl-tri- (2-methoxy ethoxy) silane.
The antioxidant is 4,4 '-thiobis (6-tert-butyl-m-cresol) and N, N' -bis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl ] hexamethylene diamine.
The initiator is a mixture of (2-ethyl) hexyl peroxydicarbonate and cumyl peroxyneodecanoate.
Example 3:
the apparatus for producing the silane crosslinked polyethylene plastic for electric wire and cable is the same as in example 1.
The preparation method of the silane crosslinked polyethylene plastic comprises the following steps:
taking 95 parts of low-density polyethylene resin, processing and drying to the moisture content of below 500PPm, then taking 0.6 part of silane coupling agent and 0.2 part of initiator, weighing by an automatic metering device 1, sending the materials into a single-screw extruder 4 through a spiral feeding machine 3, mixing, plasticizing, reacting at high temperature, removing the moisture and volatile substances of an extrudate through a vacuum negative pressure remover 5, cooling and granulating the reactant, drying by a drying tower 6, and storing the dried material in a vacuum packaging bag to obtain a silane grafting material A:
weighing 5 parts of low-density polyethylene resin, 0.5 part of silane coupling agent, 0.7 part of initiator, 0.5 part of antioxidant and 0.8 part of catalyst by an automatic metering device 1, then placing the weighed materials in a high-speed mixer 2 for premixing, sending reactants into a single-screw extruder 4 by a spiral feeding machine 3 for mixing, plasticizing and melt extrusion, leading the extrudate to pass through a vacuum negative pressure remover 5, removing moisture and volatile substances, then cooling and granulating the reactants, drying the reactants by a drying tower 6, and storing the dried materials in a vacuum packaging bag to obtain a catalyst master batch B;
the weight ratio of the material A to the material B is material A: material B is 95: 7, mixing the silane grafting material A and the catalyst master batch B in a single screw extruder 4, extruding, and then crosslinking and mixing in a steam crosslinking device 7 to obtain the silane crosslinked polyethylene plastic, wherein the test results are shown in Table 1 by adopting JB/T10260-2001 standard.
The silane coupling agent is three mixtures of vinyl trimethoxy silane, vinyl triethoxy silane and vinyl-tri- (2-methoxyethoxy) silane.
The antioxidant is a mixture of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and 4, 4' -thiobis- (6-tert-butyl-3-methylphenol).
The initiator is a mixture of (2-ethyl) hexyl peroxydicarbonate and cumyl peroxyneodecanoate.
Table 1 results of performance tests conducted
| Test items | Unit of | Index value | Example 1 | Example 2 | Example 3 |
| Dielectric strength | MV/m | ≥25 | 33 | 30 | 32 |
| Factor of dielectric loss | ≤1.0×10-3 | 1.0×10-4 | 4.0×10-3 | 4.0×10-4 | |
| Tensile strength | MPa | ≥13.5 | 15.8 | 17.3 | 16.8 |
| Growth rate at break | ％ | ≥350 | 560 | 500 | 530 |
| Rate of change of tensile strength | ％ | ≤±20 | 20 | 18 | 20 |
| Rate of change of elongation at break | ％ | ≤±20 | -15 | -11 | -14 |
| Vicat softening point | 133 | 133 | 133 | 133 |
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, but equivalent modifications or changes made by those skilled in the art according to the present disclosure should be included in the scope of the present invention as set forth in the appended claims.
Claims (10)
1. The utility model provides a production facility of silane crosslinked polyethylene plastics for wire and cable which characterized in that: comprises an automatic metering device, a high-speed mixer, a spiral feeding machine, a single-screw extruder, a vacuum negative pressure remover, a drying tower, a steam cross-linking device and a storage barrel; wherein,
the high-speed mixer comprises a pot cover, a guide plate, a base, a first power mechanism arranged in the base and a charging barrel arranged on the base, wherein a rotating impeller is arranged at the lower end of the charging barrel and connected with the first power mechanism, a pot cover is arranged on the charging barrel, a locking device is arranged on the pot cover, the pot cover is connected with the charging barrel through the locking device, and a blowing device is arranged on the pot cover; a jacket is arranged inside the charging barrel, a guide plate is arranged on one side inside the jacket, uniformly distributed cutting teeth are arranged on the other side inside the jacket, a first discharging port is arranged at the bottom of the charging barrel, a cover plate is arranged at the first discharging port, and a blowing device is arranged on the cover plate;
the single-screw extruder comprises a rotation control mechanism, a feeding device, a single-screw extruder barrel, a base, an oil temperature machine and an oil cylinder, wherein the feeding device is arranged above the single-screw extruder barrel; a machine barrel is arranged in the single-screw extruder barrel, and a screw is arranged in the machine barrel; a second discharge hole is formed in the right end of the single-screw extruder barrel; the lower end of the single-screw extruder barrel is provided with a drain pipe, and the rotation control mechanism and the single-screw extruder barrel are both fixed on the base; the screw comprises three sections, namely a conveying section, a melting section and a metering section from left to right in sequence;
the vacuum negative pressure remover comprises a motor, a speed reducer, a chain wheel, a fixed shaft, a rotary joint, a first material cylinder, a second material cylinder, a third material cylinder and a vacuum device, wherein the motor is connected with the speed reducer, the speed reducer is connected with the rotary joint through the chain wheel, the rotary joint is connected with the first material cylinder, the first material cylinder is connected with the second material cylinder through the rotary joint, the fixed shaft and the rotary joint in sequence, the second material cylinder is connected with the third material cylinder through the rotary joint, the fixed shaft and the rotary joint in sequence, a stainless steel inner wall, a heating jacket, an iron plate and a stainless steel outer wall are sequentially arranged in the first material cylinder from inside to outside, heat conducting oil is arranged in the heating jacket, a resistance heating sheet or an electric heating wire is arranged in the iron plate heat-insulating layer, the second material cylinder is connected with the vacuum device, and the vacuum device, the vacuum tube is provided with a vacuum meter and a filter, and the first material cylinder, the second material cylinder and the third material cylinder are connected through connecting tubes;
the automatic metering device is sequentially connected with the high-speed mixer, the spiral feeding machine, the single-screw extruder, the vacuum negative-pressure remover, the drying tower, the single-screw extruder, the steam cross-linking device and the storage barrel.
2. The apparatus for producing silane-crosslinked polyethylene plastic for electric wires and cables according to claim 1, wherein: steam cross-linking device includes water tank, moisturizing pump, water pump, steam heat generator, re-heater, steam cross-linking case, filter and condenser, the moisturizing pump links to each other with the water tank, the water tank passes through the water pump and links to each other with steam generator, steam generator passes through the re-heater and links to each other with steam cross-linking case, steam cross-linking case lower extreme is equipped with the blast pipe, the blast pipe loops through filter, condenser and links to each other with the water tank.
3. The apparatus for producing silane-crosslinked polyethylene plastic for electric wires and cables according to claim 1, wherein: the oil temperature machine is internally provided with a heater and a cooler.
4. The apparatus for producing silane-crosslinked polyethylene plastic for electric wires and cables according to claim 1 or 3, wherein: the oil temperature machine is also internally provided with a thermometer and an oil pump, and is connected with the oil cylinder through the oil pump.
5. The apparatus for producing silane-crosslinked polyethylene plastic for electric wires and cables according to claim 1, wherein: the rotation control mechanism comprises a motor, a linkage shaft, a speed reducer and a power distribution box, the motor is connected with the speed reducer through the linkage shaft, the speed reducer is connected with the power distribution box, and the screw is connected with the power distribution box; the first power mechanism comprises a motor, a driven wheel and a driving wheel fixed on the motor, the driving wheel and the driven wheel are connected through a conveying belt sleeve, and the driven wheel is connected with a rotating impeller.
6. The production method of the apparatus for producing the silane crosslinked polyethylene plastic for electric wires and cables according to claim 1, wherein: the plastic comprises the following components in parts by weight: 100 parts of low-density polyethylene resin, 0.5-5 parts of silane coupling agent, 0.2-2 parts of initiator, 0.3-3 parts of antioxidant and 0.2-1 part of catalyst; the preparation method is a two-step method and comprises the steps of preparing a material A and a material B, mixing the material A and the material B, wherein the material A is a silane grafting material, and the material B is a catalyst master batch, and the preparation method comprises the following steps:
preparation of material A: processing and drying low-density polyethylene resin until the moisture content is below 500PPm, then weighing the low-density polyethylene resin, a silane coupling agent and an initiator according to corresponding adding proportions by an automatic metering device, feeding the materials into a single-screw extruder for mixing, plasticizing and high-temperature reaction, removing the moisture and volatile substances by a vacuum negative pressure remover, cooling and granulating, drying by a drying tower, and storing the dried materials in a vacuum packaging bag;
preparing a material B, namely premixing the low-density polyethylene resin, the silane coupling agent, the initiator, the antioxidant and the catalyst in a high-speed mixer according to corresponding addition proportions, mixing, plasticizing and melt-extruding in a single-screw extruder, removing moisture and volatile substances through a vacuum negative pressure remover, cooling and granulating, drying through a drying tower, and storing the dried material in a vacuum packaging bag; and (3) mixing the material A and the material B in a single-screw extruder according to the proportion, extruding, and then crosslinking and mixing in a steam crosslinking device to obtain the silane crosslinked polyethylene plastic.
7. The method according to claim 6, wherein the silane coupling agent is one or more selected from the group consisting of vinyltriacetoxysilane, gamma-glycidylpropyltrimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyl-tris- (2-methoxyethoxy) silane, gamma-aminopropyltriethoxysilane, and anilinomethyltrimethoxysilane.
8. The process according to claim 6, wherein the antioxidant is N, N-diphenylp-aniline, N-phenyl-N ' -cyclohexylp-aniline, phenyl- β -naphthylamine, N-N-di- β -naphthylp-phenylenediamine, 2, 6-di-t-butyl-4-methylphenol, pentaerythritol tetrakis [ β - (3, 5-di-t-butyl-4-hydroxyphenyl) propionate ], 2 ' -methylenebis (4-methyl-6-t-butylphenol), 4 ' -thiobis- (6-t-butyl-3-methylphenol), 4 ' -thiobis (6-t-butyl-m-cresol) or N, N ' -bis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl ] hexamethylene diamine.
9. The method according to claim 6, wherein the initiator is one or more selected from the group consisting of 2-ethylhexyl peroxydicarbonate, cumyl peroxyneodecanoate, di (2-ethyl) hexyl peroxide, 2,4, 4-trimethylpentyl peroxyneodecanoate, di-3, 5, 5-trimethylacetyl peroxide and tert-butyl peroxypivalate.
10. The production method according to claim 6, wherein the weight ratio of the material A to the material B is as follows: a material: material B = 95-97: 7-3.
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| CN107127917B (en) * | 2017-05-05 | 2019-06-25 | 浙江沃坦科水暖设备有限公司 | A kind of cross-linking treatment method of silane cross-linked polyethylene aluminium plastic multiple tube |
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| CN101050290A (en) * | 2007-04-29 | 2007-10-10 | 沈阳化工学院 | Dynamic sulfurated retardant composite material of polypropylene without halogen, and preparation method |
| CN102585336A (en) * | 2012-03-16 | 2012-07-18 | 天津市普立泰高分子科技有限公司 | Chemical foaming high density polyethylene insulation material and preparation method thereof |
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| CN102585336A (en) * | 2012-03-16 | 2012-07-18 | 天津市普立泰高分子科技有限公司 | Chemical foaming high density polyethylene insulation material and preparation method thereof |
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