CN103923372A - PE (polyethylene) tubular product and preparation method thereof as well as equipment - Google Patents
PE (polyethylene) tubular product and preparation method thereof as well as equipment Download PDFInfo
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- CN103923372A CN103923372A CN201410152486.0A CN201410152486A CN103923372A CN 103923372 A CN103923372 A CN 103923372A CN 201410152486 A CN201410152486 A CN 201410152486A CN 103923372 A CN103923372 A CN 103923372A
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/67—Screws having incorporated mixing devices not provided for in groups B29C48/52 - B29C48/66
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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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/565—Screws having projections other than the thread, e.g. pins
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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
- B29C48/92—Measuring, controlling or regulating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
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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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92923—Calibration, after-treatment or cooling zone
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2427/18—Homopolymers or copolymers of tetrafluoroethylene
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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
- C08L2203/18—Applications used for pipes
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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
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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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)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a PE (polyethylene) tubular product. The PE tubular product comprises 90-110 parts of PE 100, 0.5-3 parts of functional master batch and 1-4 parts of concentrated color masterbatch. A preparation method of the PE tubular product comprises the following steps: firstly weighing the components, sequentially putting the components in a mixer, uniformly mixing at the temperature of 70-90 DEG C, and carrying out extrusion forming on the mixture by using a screw extruder. As the inner wall of the PE tubular product produced by using the PE100 raw material through improvement of a tubular product formula, the preparation method and processing equipment is very flat and smooth, the problem that water scale easily deposits on the inner wall in a using process of a pipeline, is solved on the premise of keeping the original mechanical strength; the production efficiency and the product percent of pass are obviously increased; and the manufacturing cost of the product is greatly reduced.
Description
Technical field
The present invention relates to a kind of tubing, relate in particular to a kind of PE tubing and preparation method thereof and equipment.
Background technology
PE(polyethylene) due to its superior performance, be widely used in water service pipe and manufacture field.PE water-feeding pipes has good erosion resistance, sanitation performance, snappiness, lower temperature resistance and longer work-ing life, production energy consumption is low, flow resistance is little, and simple installation is rapid, has become traditional water supply steel tube and PVC(polyvinyl chloride) ideal substitute of water service pipe.For meeting the requirement of water-feeding pipes hydrostatic strength and other physical strength, using PE(polyethylene) when material produce water-feeding pipes product, adopt the trade mark is the raw material of PE100 more.Because the minimum desired strength of this material of PE100 is 10MPa, can meet the requirement of various physical strengths.
But, because PE100 Raw material processing mobility is poor, with this raw material production water-feeding pipes product, when extrusion, discharging speed is slow, and production efficiency is low, and axial cut and irregular indenture easily appear in pipe material inner wall, outer pipe wall low in glossiness, after the long-time use of tubing, inwall can scaling.In actual production process, use PE100 raw material often to cause conforming product rate low, increase the manufacturing cost of enterprise.
Summary of the invention
The object of this invention is to provide a kind of PE tubing by PE100 raw material production, this tubing inside and outside wall is all very smooth smooth, and inwall is difficult for scaliness, and production efficiency is high.The present invention also provides preparation method and the equipment of this PE tubing.
For achieving the above object, technical scheme of the present invention is: a kind of PE tubing, and described PE tubing comprises the component of following parts by weight:
90～110 parts of PE100;
0.5～3 part of functional master batch;
1～4 part of concentrated colour batch;
Described functional master batch comprises the component of following parts by weight:
In described functional master batch, taking linear low density polyethylene as carrier, taking tetrafluoroethylene-perfluorinated alkoxy vinyl ether copolymer as processing aid, taking erucicamide as dispersion agent, and coordinate titanate coupling agent.In extrusion process, tetrafluoroethylene-perfluorinated alkoxy vinyl ether copolymer (PFA processing aid) particle migration with low surface energy to the metallic surface of the machine barrel of bath surface and forcing machine, screw rod, die head contacts, and forms and can make smooth and easy " coating " flowing through of PE100 melt gradually between polymer melt and the metallic surface of forcing machine inside.This " migration " and " coating " decline the clinging power between PE100 melt and metallic surface, and shearing stress has also had obvious decline simultaneously.Like this, the tubing surfaces externally and internally planeness of extruding and slickness are all very good, and because material flow resistance is little, discharging speed is fast, can make the output of unit time significantly improve, and has greatly improved the production efficiency of tubing.
Further, described concentrated colour batch comprises the composition of following parts by weight:
85～90 parts of Low Density Polyethylenes;
0.5～2 part of carbon black;
10～15 parts of barium laurates.
Wherein, concentrated colour batch is taking Low Density Polyethylene (LDPE) as carrier, taking carbon black as tinting material, taking barium laurate as dispersion agent.
The preparation method of PE tubing of the present invention is:
First take each component, and each component is dropped in mixer successively, at 70 DEG C-90 DEG C, mix and obtain compound, compound screw extrusion press extrusion moulding, in extrusion, extruder temperature is 40 DEG C～60 DEG C, barrel temperature is 170 DEG C～185 DEG C, and die temperature is 190 DEG C～200 DEG C; After tube extrusion, adopt vacuum cooling sizing method to carry out cooling and shaping to tubing, when cooling, vacuum tightness is-0.02MPa～-0.04MPa, and cooling temperature is 15 DEG C～20 DEG C.
The equipment using in the preparation method of PE tubing of the present invention, described equipment is screw extrusion press, the screw-rod structure of screw extrusion press is provided with solid phase section successively along the direction that feeds of raw material, solid-liquid is section alternately, barrier screen and pin section, the solid phase section of screw rod is provided with a spiral helicine screw thread along screw axial, the solid-liquid of screw rod alternately section is provided with two spiral helicine screw threads along screw axial, article two, between screw thread, form two kinds of screw channels that solid phase and liquid phase replace, described barrier screen arranges more than two spiral helicine groove along screw axial interval, groove one end is opening, the other end is sealing, the opening direction of adjacent notches is contrary, described pin section is provided with the above pin vertical and annular with screw axial in two places.
Screw extrusion press of the present invention adopts above screw-rod structure, and compound enters from the solid phase section of screw rod, then through heating, and part component melts, compound then enters alternately two screw channels of section of solid-liquid, and two screw channels are respectively used to take up solid phase and liquid phase.Compound from solid-liquid alternately section out, the melting of most of compound, the not molten solid phase mixing material of part, through the groove of barrier screen, is blocked in groove, until flow out from the opening of groove after being heated to form liquid phase; Finally, compound enters pin section, and the ring-type pin of pin section setting is smashed a small amount of residual solid phase mixing material, increases the heat transfer area between solid fragment and melt, makes the complete fusion plastification of compound.
The present invention adopts this compound high-efficiency screw structure of above separation-barrier-pin, just can make compound plasticizing evenly, greatly less production energy consumption under lower processing temperature.Its structure makes in compound extrusion process, and melt pressures at different levels are compared with balance, and pressure surge is little, thereby makes extruding pipe material product inside and outside wall planeness good.And this screw-rod structure, significantly improves the transfer rate of compound in barrel, extrusion efficiency also just obviously improves.
The present invention is by the improvement to formulating of recipe for pipes, preparation method, processing units, adopt the tubing inside and outside wall of PE100 raw material production all very smooth smooth, keeping under the prerequisite of original physical strength, not only solve the problem of the easy scaliness of inwall in pipeline use procedure, and obviously enhance productivity and conforming product rate, greatly reduce the manufacturing cost of product.
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments for brief description of the drawings:
Fig. 1 is the structural representation of screw rod of the present invention.
The present invention is further detailed explanation below in conjunction with embodiment for embodiment:
A kind of PE tubing of the present invention, described PE tubing comprises the component of following parts by weight:
90～110 parts of PE100;
0.5～3 part of functional master batch;
1～4 part of concentrated colour batch;
Described functional master batch comprises the component of following parts by weight:
The preparation method of PE tubing of the present invention is:
First take each component, and each component is dropped in mixer successively, at 70-90 DEG C, mix formation compound, compound screw extrusion press extrusion moulding, in extrusion, extruder temperature is 40 DEG C～60 DEG C, barrel temperature is 170 DEG C～185 DEG C, and die temperature is 190 DEG C-200 DEG C; After tube extrusion, adopt vacuum cooling sizing method to carry out cooling and shaping to tubing, when cooling, vacuum tightness is-0.02MPa～-0.04MPa, and cooling temperature is 15 DEG C～20 DEG C.
Embodiment 1
The preparation method of PE tubing is:
1) first take each component by formula:
90 parts of PE100;
0.5 part of functional master batch;
4 parts of concentrated colour batches;
Described functional master batch comprises the component of following parts by weight:
Described concentrated colour batch comprises the composition of following parts by weight:
85 parts of Low Density Polyethylenes;
2 parts of carbon blacks;
10 parts of barium laurates.
2) each component is dropped in mixer successively, at 70 DEG C, mix formation compound, compound screw extrusion press extrusion moulding, in extrusion, extruder temperature is 60 DEG C, and barrel temperature is 170 DEG C, and die temperature is 200 DEG C; After tube extrusion, adopt vacuum cooling sizing method to carry out cooling and shaping to tubing, when cooling, vacuum tightness is-0.02MPa, and cooling temperature is 15 DEG C～20 DEG C.
Embodiment 2
The preparation method of PE tubing is:
1) first take each component by formula:
110 parts of PE100;
3 parts of functional master batchs;
1 part of concentrated colour batch;
Described functional master batch comprises the component of following parts by weight:
Described concentrated colour batch comprises the composition of following parts by weight:
90 parts of Low Density Polyethylenes;
0.5 part of carbon black;
15 parts of barium laurates.
2) each component is dropped in mixer successively, at 90 DEG C, mix formation compound, compound screw extrusion press extrusion moulding, in extrusion, extruder temperature is 40 DEG C, and barrel temperature is 185 DEG C, and die temperature is 190 DEG C; After tube extrusion, adopt vacuum cooling sizing method to carry out cooling and shaping to tubing, when cooling, vacuum tightness is-0.04MPa, and cooling temperature is 15 DEG C～20 DEG C.
Embodiment 3
The preparation method of PE tubing is:
1) first take each component by formula:
100 parts of PE100;
2 parts of functional master batchs;
2 parts of concentrated colour batches;
Described functional master batch comprises the component of following parts by weight:
Described concentrated colour batch comprises the composition of following parts by weight:
87 parts of Low Density Polyethylenes;
1.0 parts of carbon blacks;
12 parts of barium laurates.
2) each component is dropped in mixer successively, at 80 DEG C, mix formation compound, compound screw extrusion press extrusion moulding, in extrusion, extruder temperature is 50 DEG C, and barrel temperature is 180 DEG C, and die temperature is 195 DEG C; After tube extrusion, adopt vacuum cooling sizing method to carry out cooling and shaping to tubing, when cooling, vacuum tightness is-0.03MPa, and cooling temperature is 15 DEG C～20 DEG C.
The equipment using in the preparation method of PE tubing of the present invention, described equipment is screw extrusion press, the screw-rod structure of screw extrusion press is provided with solid phase section 1 successively along the direction that feeds of raw material, solid-liquid is section 2 alternately, barrier screen 3 and pin section 4, the solid phase section 1 of screw rod is provided with a spiral helicine screw thread 11 along screw axial, the solid-liquid of screw rod alternately section 2 is provided with two spiral helicine screw threads 21 along screw axial, 22, article two, between screw thread, form two kinds of screw channels 23 that solid phase and liquid phase replace, 24, described barrier screen 3 arranges more than two spiral helicine groove 31 along screw axial interval, groove 31 one end are opening 32, the other end is sealing, opening 32 opposite directions of adjacent notches 31, described pin section 4 is provided with the above pin 41 vertical and annular with screw axial in two places.
Screw extrusion press of the present invention adopts above screw-rod structure, compound enters from the solid phase section 1 of screw rod, then through heating, part component melts, compound then enter solid-liquid alternately 23,24, two screw channels 23,24 of two screw channels of section 2 be respectively used to take up solid phase and liquid phase.Compound from solid-liquid alternately section 2 out, the melting of most of compound, the not molten solid phase mixing material of part, through the groove 31 of barrier screen 3, is blocked in groove 31, until flow out from the opening 32 of groove 31 after being heated to form liquid phase; Finally, compound enters pin section 4, and the ring-type pin 41 that pin section 4 arranges is smashed a small amount of residual solid phase mixing material, increases the heat transfer area between solid fragment and melt, makes the complete fusion plastification of compound.
Applying component of the present invention, preparation method and equipment can obviously enhance productivity: compared with prior art, this technology production efficiency can improve 15%-30%.Specifically as shown in table 1.
The tubing that table 1 embodiment of the present invention 3 is produced and the contrast of the production efficiency of existing production technology (unit: ton/8 hours)
The present invention can obviously improve duct products inside and outside wall planeness and slickness, is keeping, under the prerequisite of original physical strength, effectively solving the problem of the easy scaliness of inwall in pipeline use procedure.
Claims (4)
1. a PE tubing, is characterized in that: described PE tubing comprises the component of following parts by weight:
90 ~ 110 parts of PE100;
0.5 ~ 3 part of functional master batch;
1 ~ 4 part of concentrated colour batch;
Described functional master batch comprises the component of following parts by weight:
80 ~ 90 parts of linear low density polyethylenes;
4 ~ 5 parts of tetrafluoroethylene-perfluorinated alkoxy vinyl ether copolymers;
5 ~ 10 parts of erucicamides;
0.5 ~ 1 part of titanate coupling agent.
2. PE tubing according to claim 1, is characterized in that: described concentrated colour batch comprises the composition of following parts by weight:
85 ~ 90 parts of Low Density Polyethylenes;
0.5 ~ 2 part of carbon black;
10 ~ 15 parts of barium laurates.
3. the preparation method of PE tubing as claimed in claim 1 or 2, is characterized in that: described preparation method is:
First take each component, and each component is dropped in mixer successively, at 70 DEG C-90 DEG C, mix and obtain compound, compound screw extrusion press extrusion moulding, in extrusion, extruder temperature is 40 DEG C ~ 60 DEG C, barrel temperature is 170 DEG C ~ 185 DEG C, and die temperature is 190 DEG C ~ 200 DEG C; After tube extrusion, adopt vacuum cooling sizing method to carry out cooling and shaping to tubing, when cooling, vacuum tightness is-0.02MPa ~-0.04MPa, and cooling temperature is 15 DEG C ~ 20 DEG C.
4. the equipment using in the preparation method of PE tubing as claimed in claim 3, it is characterized in that: described equipment is screw extrusion press, the screw-rod structure of screw extrusion press is provided with solid phase section successively along the direction that feeds of raw material, solid-liquid is section alternately, barrier screen and pin section, the solid phase section of screw rod is provided with a spiral helicine screw thread along screw axial, the solid-liquid of screw rod alternately section is provided with two spiral helicine screw threads along screw axial, article two, between screw thread, form two kinds of screw channels that solid phase and liquid phase replace, described barrier screen arranges more than two spiral helicine groove along screw axial interval, groove one end is opening, the other end is sealing, the opening direction of adjacent notches is contrary, described pin section is provided with the above pin vertical and annular with screw axial in two places.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410152486.0A CN103923372B (en) | 2014-04-16 | 2014-04-16 | PE (polyethylene) tubular product and preparation method thereof as well as equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410152486.0A CN103923372B (en) | 2014-04-16 | 2014-04-16 | PE (polyethylene) tubular product and preparation method thereof as well as equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103923372A true CN103923372A (en) | 2014-07-16 |
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