CN108000833A - Height filling environmental protection MPP power pipe preparation processes - Google Patents
Height filling environmental protection MPP power pipe preparation processes Download PDFInfo
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- CN108000833A CN108000833A CN201711070180.0A CN201711070180A CN108000833A CN 108000833 A CN108000833 A CN 108000833A CN 201711070180 A CN201711070180 A CN 201711070180A CN 108000833 A CN108000833 A CN 108000833A
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- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
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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
- 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (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 present invention relates to a kind of power pipe, discloses a kind of high filling environmental protection MPP power pipe preparation processes, it comprises the following steps：Prepare tube body outer layer masterbatch；Prepare tube body internal layer masterbatch；Internal layer masterbatch and outer layer masterbatch are added separately to different feed bin drying and preheatings, extruded through single screw extrusion machine；Internal layer and outer layer are sent using double-layer coextrusion mode, material heats by extruder screw, melted, is plasticized and is transported to machine head port mould, and additional proportion is 1 in an extruder:The intermediate stress layer that 3 glass fibre and polyethylene mixes, is made by way of co-extrusion on electric power outer tube layer and the interior lateral surface of electric power inner tube layer stressor layers formed between.It is glass modified polypropene the invention enables MPP electric power outer tube layer, internal layer is calcium carbonate modified polypropylene, intermediate stress layer is fiberglass layer, realize ectonexine, intermediate stress layer uniform fusion, technique is simpler, stable quality is reliable, at the same to equipment damage it is smaller, improve power pipe it is strong, reduction ensure that inner wall friction coefficient.
Description
Technical field
The present invention relates to a kind of power pipe, more particularly to a kind of high filling environmental protection MPP power pipe preparation processes.
Background technology
No-excavation construction method (Trenchless Technology or No Dig) is situation about not ditching in ground surface
Under, pass through a kind of techniques or methods for detecting, reconnoitring, being laid with (or replace or repair) various subsurface utility pipelines.With biography
The excavation construction of system is compared, trenchless technology have do not influence surrounding enviroment, do not influence traffic, is easy for construction, integrated construction expense
It is without damage with low, short construction period, ground surface, the advantages that social benefit is notable.It is widely used in passing through various buildings, river
Road, highway, railway, business district and various traffic main arteries etc., to municipal plumbing, coal gas, oil, natural gas, electric power, logical
The pipelines such as news are laid with, are replaced and are repaired.
The technology is come from the 1970s, and introducing China the nineties.In developed country (such as the U.S., Japan etc.)
Trenchless technology application is very extensive, and China is progressively promoting trenchless technology, and mainly no-dig technique pipeline is laid with, and
Piping foundation and reparation are also at the early-stage.With the development of China's urban construction, promotion and application of the trenchless technology in China
Also grow with each passing hour, non-excavating construction has penetrated into the laying of the underground utilities such as natural gas, Shang Shui, lower water, sewage, electric power and information
In reparation.
Modified polypropene (MPP) plastic cable pipe transmission electric power is laid with using underground trenchless technology, demand increases severely, not
To be expected to enter ground by all aerial " cobweb " for several years.City uses embedded underground cable transmission electric power, and one kind is used for non-open
Digging by the use of modified polypropene (MPP) plastics push pipe as protection cable plastic protecting casing just largely be used for engineering in.MPP
Tubing is more superior compared to performance than common HDPE pipes, and sweat soldering joint flexible is good, plumb joint intensity is high, heat resistance is good, can
As the high tractive force hauling pipe of overlength degree, there is excellent anti-stratum settlement and anti-seismic performance.
The pipeline in city is laid with and adjusted achieving environmental protection and energy savingly using trenchless technology, has widely applied MPP cables electric
Power protecting pipe.For this reason, national China National Light Industrial Products Department has issued Q/BR0lO-2007《No-dig technique high voltage power cable protection modified polypropene
MPP tubing》Professional standard, starts to popularize MPP power pipes in an all-round way.In face of the sound social atmosphere of 21 century plastic tube demand, it is believed that MPP
The development of power pipe must have very wide prospect, and also higher and higher for the performance requirement of MPP power pipes.
The content of the invention
The problem of present invention is for the performance for how further improving MPP power pipes in the prior art, there is provided Yi Zhonggao
Fill environmental protection MPP power pipe preparation processes.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals：
Height filling environmental protection MPP power pipe preparation processes, it comprises the following steps：
Step 1: prepare tube body outer layer masterbatch；
Step 2: prepare tube body internal layer masterbatch；
Done Step 3: the internal layer masterbatch prepared in step 1 and step 2 and outer layer masterbatch are added separately to different feed bins
Dry preheating, is extruded through single screw extrusion machine；
Step 4: using double-layer coextrusion mode, machine extrusion electric power outer tube layer, machine extrusion electric power inner tube layer, material by
Extruder screw heating, melting, plasticizing are transported to machine head port mould；
Step 5: additional proportion is 1 in an extruder:The intermediate stress layer that 3 glass fibre and polyethylene mixes,
Made by way of co-extrusion on electric power outer tube layer and the interior lateral surface of electric power inner tube layer stressor layers formed between.
Shape preferably, vacuumizing to cool down again by internal diameter calibration sleeve in step 4 to electric power inner tube layer.
Preferably, in fixed length cutting after the product progress circulating water that step 5 is obtained.
Preferably, following steps are specifically included in step 1：
(1) 65-75 parts of polypropylene, 20-30 parts of glass fibre, 2-3 parts silane coupled is weighed respectively by weight
Agent, 1-2 parts of stearic acid and 1-2 parts of paraffin；
(2) glass fibre weighed is placed into dry 4-5h in baking oven, 80 DEG C of temperature, loads hermetic bag after natural cooling
It is spare；
(3) silane coupling agent weighed is hydrolyzed, obtains the titanate coupling agent that mass percent is 1.5% and hydrolyze
Liquid；
(4) high-speed mixer is preheating to 75 DEG C of barrel zone temperature, and the glass fibre in step 2 is poured into high-speed mixer
Stir 15min, rotating speed 750r/min：
(5) the silane coupling agent hydrolyzate in step 3 is added in the glass fibre after step 4 is handled, mixed successively
Stirring, filtering, drying are closed, obtains modified inorganic filler；
(6) stearic acid, the paraffin and poly- third that will have been weighed in the modified inorganic filler obtained in step 5 and step 1
Alkene mixes, and is put into double screw extruder；
(7) material after extrusion obtains outer layer masterbatch in pelleter pelletizing.
Preferably, following steps are specifically included in step 2：
(1) 65-75 parts of polypropylene, 20-30 parts of precipitated calcium carbonate, 2-3 parts of titanate esters is weighed respectively by weight
Coupling agent, 1-2 parts of stearic acid and 1-2 parts of paraffin；
(2) precipitated calcium carbonate weighed is placed into dry 4-5h in baking oven, 80 DEG C of temperature, loads sealing after natural cooling
Bag is spare；
(3) titanate coupling agent weighed is hydrolyzed, obtains the titanate coupling agent that mass percent is 1.5% and hydrolyze
Liquid；
(4) high-speed mixer is preheating to 75 DEG C of barrel zone temperature, and the precipitated calcium carbonate in step 2 is poured into high-speed mixer
Middle stirring 15min, rotating speed 750r/min：
(5) the titanate coupling agent hydrolyzate in step 3 is added in the precipitated calcium carbonate after step 4 is handled, according to
It is secondary to be mixed, filter, drying, obtain modified inorganic filler；
(6) stearic acid, the paraffin and poly- third that will have been weighed in the modified inorganic filler obtained in step 5 and step 1
Alkene mixes, and is put into double screw extruder；
(7) material after extrusion obtains internal layer masterbatch in pelleter pelletizing.
The present invention has significant technique effect as a result of above technical scheme：
It is glass modified polypropene the invention enables MPP electric power outer tube layer, internal layer is calcium carbonate modified polypropylene, and centre should
Power layer is fiberglass layer, realizes ectonexine, intermediate stress layer uniform fusion, and technique is simpler, and stable quality is reliable, while to equipment
Damage is smaller, it is strong to improve power pipe, and reduction ensure that inner wall friction coefficient.
Embodiment
Embodiment 1
Height filling environmental protection MPP power pipe preparation processes, it comprises the following steps：
Step 1: prepare tube body outer layer masterbatch；
Step 2: prepare tube body internal layer masterbatch；
Done Step 3: the internal layer masterbatch prepared in step 1 and step 2 and outer layer masterbatch are added separately to different feed bins
Dry preheating, is extruded through single screw extrusion machine；
Step 4: using double-layer coextrusion mode, machine extrusion electric power outer tube layer, machine extrusion electric power inner tube layer, material by
Extruder screw heating, melting, plasticizing are transported to machine head port mould, are vacuumized and are cooled down again to electric power inner tube layer by internal diameter calibration sleeve
Sizing；
Step 5: additional proportion is 1 in an extruder:The intermediate stress layer that 3 glass fibre and polyethylene mixes,
Made by way of co-extrusion on electric power outer tube layer and the interior lateral surface of electric power inner tube layer stressor layers formed between, then will obtained
Product carry out circulating water after in fixed length cutting.
Ectonexine, intermediate stress layer uniform fusion are realized in the present embodiment, technique is simpler, and stable quality is reliable, at the same time
It is smaller to equipment damage.Wherein internal layer vacuumizes cooling and shaping again by internal diameter calibration sleeve, and outer layer is in internal air pressure and outside
Under the collective effect of portion's pull of vacuum with forming module compression molding, modified polypropene internal layer and the outer layer shape by the way of co-extrusion
Into ectonexine, intermediate stress layer uniform fusion on the interior lateral surface of intermediate stress layer, is realized, intermediate stress layer includes glass
Layer, the advantages of using glass fiber material, improves the physical and mechanical property of tubing, enhancing tubing is during installation and use
Survivability, while production cost is reduced again.
At the same time following steps are specifically included in step 1 in the present embodiment：
(1) 65-75 parts of polypropylene, 20-30 parts of glass fibre, 2-3 parts silane coupled is weighed respectively by weight
Agent, 1-2 parts of stearic acid and 1-2 parts of paraffin；
(2) glass fibre weighed is placed into dry 4-5h in baking oven, 80 DEG C of temperature, loads hermetic bag after natural cooling
It is spare, prevent the moisture in suction air.
(3) silane coupling agent weighed is hydrolyzed, obtains the titanate coupling agent that mass percent is 1.5% and hydrolyze
Liquid, effectively improves coupling performance, simplifies technique；
(4) high-speed mixer is preheating to 75 DEG C of barrel zone temperature, and the glass fibre in step 2 is poured into high-speed mixer
Stir 15min, rotating speed 750r/min：
(5) the silane coupling agent hydrolyzate in step 3 is added in the glass fibre after step 4 is handled, mixed successively
Stirring, filtering, drying are closed, obtains modified inorganic filler；
(6) stearic acid, the paraffin and poly- third that will have been weighed in the modified inorganic filler obtained in step 5 and step 1
Alkene mixes, and is put into double screw extruder；
(7) material after extrusion obtains outer layer masterbatch in pelleter pelletizing.
Following steps are specifically included in step 2：
(1) 65-75 parts of polypropylene, 20-30 parts of precipitated calcium carbonate, 2-3 parts of titanate esters is weighed respectively by weight
Coupling agent, 1-2 parts of stearic acid and 1-2 parts of paraffin；
(2) precipitated calcium carbonate weighed is placed into dry 4-5h in baking oven, 80 DEG C of temperature, loads sealing after natural cooling
Bag is spare；
(3) titanate coupling agent weighed is hydrolyzed, obtains the titanate coupling agent that mass percent is 1.5% and hydrolyze
Liquid；
(4) high-speed mixer is preheating to 75 DEG C of barrel zone temperature, and the precipitated calcium carbonate in step 2 is poured into high-speed mixer
Middle stirring 15min, rotating speed 750r/min：
(5) the titanate coupling agent hydrolyzate in step 3 is added in the precipitated calcium carbonate after step 4 is handled, according to
It is secondary to be mixed, filter, drying, obtain modified inorganic filler；
(6) stearic acid, the paraffin and poly- third that will have been weighed in the modified inorganic filler obtained in step 5 and step 1
Alkene mixes, and is put into double screw extruder；
(7) material after extrusion obtains internal layer masterbatch in pelleter pelletizing.
So that MPP electric power outer tube layer is glass modified polypropene in the present embodiment, internal layer is calcium carbonate modified polypropylene, in
Between stressor layers be fiberglass layer, improve power pipe intensity while, and reduce ensure that inner wall friction coefficient.
At the same time the carbonic acid of internal layer this reduced through the modified surface energy of titanate esters coupled surfaces, surface lipophile improves, and more holds
Easily it is distributed in matrix, increases with PP basal body binding forces, solves the technical problem of inorganic filler and the poor compatibility of PP.
Experiment proves that the crystallization temperature of PP in PP composite materials is gradually reduced with the increase of calcium carbonate content, crystallinity
Then decline afterwards as the increase of calcium carbonate content first improves, tend to maximum when weight ratio is 20%-30%.
Calcium carbonate forms a large amount of dispersed nucleus, in PP melt crystallization mistakes as a kind of inorganic nucleator in PP
Heterogeneous nucleating effect is played in journey, original homogeneous nucleation is become heterogeneous nucleation, spherocrystal number increases, and size is tiny, homogeneous.
Meanwhile making the crystallization rate raising at relatively high temperatures of PP molecules, spherulitic crystal structure is more regular, it is thus possible to improve MPP tubing
Mechanical property and glossiness.But continue to increase with calcium carbonate content, after 30%, nucleation number is excessive, influences different
Mutually it is nucleated, crystallinity declines on the contrary, and mechanical property is deteriorated.
Melting temperature is declined slightly with the increase of calcium carbonate content, when calcium carbonate content is 20%-30%, melting
Temperature is higher, and then melting temperature is of a relatively high consistent with crystallinity and regularity height.Because melting is crystalline fracture process, need
Heat is absorbed, so crystallinity has melting temperature certain influence.The vicat softening temperature (VST) of PP composite materials is with nothing
Machine filer content is improved and raised.But pearl filler content is too high, then mechanical property can be reduced, therefore, will be light in the application
The selection of matter calcium carbonate is by weight 20-30 parts so that the content of precipitated calcium carbonate content in total mixture is 20%-
30%.
On the other hand with the increase of calcium carbonate content, the tensile strength first increases and then decreases of PP composite materials.Due to carbon
The addition of sour calcium masterbatch improves the dispersion effect of calcium carbonate in the base, is uniformly dispersed, mechanical property is preferable.In addition, by
The surface-treated calcium carbonate lipophile of titanate coupling agent is good, easily interacts with PP, so as to produce reinforcing effect.Make
Obtain in the case of filer content is higher, remain to keep higher tensile strength.When content is more than 30%, with calcium carbonate content
Continue increase, the tensile strength of PP composite materials reduces on the contrary, mainly calcium carbonate particle constrain PP macromolecular chains
Movement and substrate deformation, are not easy to disperse when calcium carbonate content is too high, easily reunite, and aggregate easily becomes stress concentration point, shape
Into defect, cause crackle to trigger fracture at this, reduce tensile strength, reinforcing effect can not be played.Pass through experimental analysis, carbon
For sour calcium content at 30%, tensile strength can reach product standard requirement still above 25MPa.
The PP composite materials after kaolin are added, with the increase of kaolin content, tensile strength is also first to improve then
It is gradually reduced.Contrast finds that when filer content is identical, the tensile strength for adding the composite material of calcium carbonate is higher than addition kaolinite
The composite material of soil.When calcium carbonate content is more than 30%, the elongation at break of composite material declines comparatively fast：And kaolin content is
When 20%, the elongation at break of composite material reaches highest.Because with the rising of inorganic filler content, between inorganic particle
Reunion increases the frictional force between strand, hinders the sliding of strand, heterogeneous system is formd in polypropylene, inorganic
Particle and polyacrylic compatibility poor, interface binding power die down, and are flowed under viscous state in solids, make whole system
Elongation reduces.Experiment shows, in the case that additive amount is identical, kaolin clay system elongation at break is higher than calcium carbonate system.
Meanwhile as the increase of calcium carbonate content, bending modulus gradually increase, in increasing trend, as long as calcium carbonate is firm
Property filler grain plays the role of reinforcing agent, improves rigidity and the creep resistance of PP；In addition, fine calcium carbonate particle is made
To crystallize nucleus, PP spherocrystals are refined, improve the crystallinity and bending strength of PP.
With the increase of kaolin content, bending modulus first rises, and reaches maximum when kaolin content is 30%；With
Kaolin content to continue to increase, bending modulus is gradually reduced, reinforcing agent from illustrating kaolin particle in low content
Effect, improves the rigidity and creep resistance of material.But content is too high will to produce Interface Crack, crackle increases so that
PP composite materials bending modulus declines.Contrasting the PP composite materials after the calcium carbonate and Modification of kaolin of same amount can find,
Add calcium carbonate PP composite materials bending modulus be higher than add it is kaolinic, it is compatible with PP matrixes to indicate calcium carbonate
Property is more preferable.
The impact strength of PP composite materials is reached with the increase first increases and then decreases of calcium carbonate content when content is 30%
To maximum.With the increase of calcium carbonate content, calcium carbonate may be homogenously dispersed in PP matrixes, when being impacted, calcium carbonate
Particle surface can generate blind crack and cause impact strength to improve, when content is more than 30%, with adding for calcium carbonate granule
Enter, the growth of this microcrack cannot play toughening effect, make impact strength decreased on the contrary.
With the increase of kaolin content, the impact strengths of PP composite materials reduces after first slightly improving, and is in content
Reach peak when 30%.By experimental analysis, calcium carbonate and kaolin, PP composite material notch impact strengths are either added
All it is to be gradually reduced afterwards as filer content increase first improves.The calcium carbonate and kaolin of same amount, add lacking for calcium carbonate
Mouthful impact strength is higher than kaolin, illustrate calcium carbonate imitated with PP body compatibility it is more preferable, modified effect is obvious.
In conclusion being surface-treated by titanate coupling agent to calcium carbonate and kaolin, itself and PP bases can be improved
The compatibility of body and the dispersiveness in PP matrixes.The appropriate addition of inorganic filler, can improve the crystallinity of PP, and for PP
The melting temperature of composite material influences little.With calcium carbonate, the increase of kaolin clay filler content, the stretching of PP composite materials is strong
Degree, elongation at break, notch impact strength increase, and are filled out in calcium carbonate when section's content is 30% and reach maximum, bent
Modulus lifting is obvious, and vicat softening temperature also significantly improves.Integrated comparative adds calcium carbonate and kaolinic PP composite materials
Can, add the PP composite properties of calcium carbonate more preferably.
In short, the foregoing is merely presently preferred embodiments of the present invention, all equalizations made according to scope of the present invention patent
Change and modification, should all belong to the covering scope of patent of the present invention.
Claims (5)
1. height filling environmental protection MPP power pipe preparation processes, it is characterised in that it comprises the following steps：
Step 1: prepare tube body outer layer masterbatch；
Step 2: prepare tube body internal layer masterbatch；
Dried in advance Step 3: the internal layer masterbatch prepared in step 1 and step 2 and outer layer masterbatch are added separately to different feed bins
Heat, is extruded through single screw extrusion machine；
Step 4: using double-layer coextrusion mode, machine extrusion electric power outer tube layer, machine extrusion electric power inner tube layer, material is by extruding
The heating of machine screw rod, melting, plasticizing are transported to machine head port mould；
Step 5: additional proportion is 1 in an extruder:The intermediate stress layer that 3 glass fibre and polyethylene mixes, passes through
The mode of co-extrusion makes on electric power outer tube layer and the interior lateral surface of electric power inner tube layer stressor layers formed between.
2. high filling environmental protection MPP power pipe preparation processes according to claim 1, it is characterised in that：Pass through in step 4
Internal diameter calibration sleeve is vacuumized to cool down again and shaped to electric power inner tube layer.
3. high filling environmental protection MPP power pipe preparation processes according to claim 1, it is characterised in that：Step 5 is obtained
Product carry out circulating water after in fixed length cutting.
4. high filling environmental protection MPP power pipe preparation processes according to claim 1, it is characterised in that：It is specific in step 1
Comprise the following steps：
(1) weigh respectively by weight 65-75 parts polypropylene, 20-30 parts of glass fibre, 2-3 parts of silane coupling agent, 1-
The paraffin of 2 parts of stearic acid and 1-2 part；
(2) glass fibre weighed is placed into dry 4-5h in baking oven, 80 DEG C of temperature, it is standby to load hermetic bag after natural cooling
With；
(3) silane coupling agent weighed is hydrolyzed, obtains the titanate coupling agent hydrolyzate that mass percent is 1.5%；
(4) high-speed mixer is preheating to 75 DEG C of barrel zone temperature, and the glass fibre in step 2 is poured into high-speed mixer and is stirred
15min, rotating speed 750r/min：
(5) the silane coupling agent hydrolyzate in step 3 is added in the glass fibre after step 4 is handled, mixing successively is stirred
Mix, filter, dry, obtain modified inorganic filler；
(6) the modified inorganic filler obtained in step 5 is mixed with the stearic acid, paraffin and polypropylene weighed in step 1
Close, be put into double screw extruder；
(7) material after extrusion obtains outer layer masterbatch in pelleter pelletizing.
5. high filling environmental protection MPP power pipe preparation processes according to claim 1, it is characterised in that：It is specific in step 2
Comprise the following steps：
(1) 65-75 parts of polypropylene, 20-30 parts of precipitated calcium carbonate, the coupling of 2-3 parts of titanate esters is weighed respectively by weight
Agent, 1-2 parts of stearic acid and 1-2 parts of paraffin；
(2) precipitated calcium carbonate weighed is placed into dry 4-5h in baking oven, 80 DEG C of temperature, it is standby to load hermetic bag after natural cooling
With；
(3) titanate coupling agent weighed is hydrolyzed, obtains the titanate coupling agent hydrolyzate that mass percent is 1.5%；
(4) high-speed mixer is preheating to 75 DEG C of barrel zone temperature, and the precipitated calcium carbonate in step 2 is poured into high-speed mixer and is stirred
Mix 15min, rotating speed 750r/min：
(5) the titanate coupling agent hydrolyzate in step 3 is added in the precipitated calcium carbonate after step 4 is handled, mixed successively
Stirring, filtering, drying are closed, obtains modified inorganic filler；
(6) the modified inorganic filler obtained in step 5 is mixed with the stearic acid, paraffin and polypropylene weighed in step 1
Close, be put into double screw extruder；
(7) material after extrusion obtains internal layer masterbatch in pelleter pelletizing.
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| CN201711070180.0A CN108000833A (en) | 2017-11-03 | 2017-11-03 | Height filling environmental protection MPP power pipe preparation processes |
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| CN201711070180.0A CN108000833A (en) | 2017-11-03 | 2017-11-03 | Height filling environmental protection MPP power pipe preparation processes |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110406064A (en) * | 2019-07-04 | 2019-11-05 | 镇江华科通信设备有限公司 | A kind of production technology of outside diameter structure accurately MPP cable protection pipe |
| CN111873278A (en) * | 2020-06-14 | 2020-11-03 | 湖南省湘福高新塑胶有限责任公司 | PE pipe modified by calcium sulfate and production equipment thereof |
| CN113603969A (en) * | 2021-08-23 | 2021-11-05 | 浙江万吉通信器材有限公司 | Preparation method of MPP (modified Polypropylene) power pipe with heat resistance |
| CN114163841A (en) * | 2021-11-18 | 2022-03-11 | 横店集团得邦工程塑料有限公司 | Preparation method and application of polyethylene-coated inorganic particle wear-resistant agent |
| CN117382279A (en) * | 2023-08-31 | 2024-01-12 | 江苏惠升管业集团有限公司 | High-strength composite MPP power tube and preparation process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111873278A (en) * | 2020-06-14 | 2020-11-03 | 湖南省湘福高新塑胶有限责任公司 | PE pipe modified by calcium sulfate and production equipment thereof |
| CN113603969A (en) * | 2021-08-23 | 2021-11-05 | 浙江万吉通信器材有限公司 | Preparation method of MPP (modified Polypropylene) power pipe with heat resistance |
| CN114163841A (en) * | 2021-11-18 | 2022-03-11 | 横店集团得邦工程塑料有限公司 | Preparation method and application of polyethylene-coated inorganic particle wear-resistant agent |
| CN117382279A (en) * | 2023-08-31 | 2024-01-12 | 江苏惠升管业集团有限公司 | High-strength composite MPP power tube and preparation process thereof |
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