CN103923372B - 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 PDF

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Publication number
CN103923372B
CN103923372B CN201410152486.0A CN201410152486A CN103923372B CN 103923372 B CN103923372 B CN 103923372B CN 201410152486 A CN201410152486 A CN 201410152486A CN 103923372 B CN103923372 B CN 103923372B
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China
Prior art keywords
parts
tubing
preparation
component
tubular product
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CN201410152486.0A
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CN103923372A (en
Inventor
陈源喜
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FUJIAN BOTTA PLASTICS ADVANCED MATERIAL Co Ltd
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FUJIAN BOTTA PLASTICS ADVANCED MATERIAL Co Ltd
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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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/066—LDPE (radical process)

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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

A kind of PE tubing and preparation method thereof and equipment
Technical field
The present invention relates to a kind of tubing, more particularly to a kind of PE tubing and preparation method thereof and equipment.
Background technology
PE（Polyethylene）Due to its superior performance, it is widely used in feed pipe manufacture field.PE water-feeding pipes have Excellent corrosion resistance, sanitation performance, pliability, lower temperature resistance and longer service life, energy consumption is low, resistance to water-flow Little, simple installation is rapid, it has also become traditional water supply steel tube and PVC（Polrvinyl chloride）The ideal substitute of feed pipe.Give to meet The requirement of water pipe material hydrostatic strength and other machinery intensity, is using PE（Polyethylene）During material production water-feeding pipes product, Adopt the trade mark for PE100 raw material.Because the minimum desired strength of this materials of PE100 is 10MPa, various machineries can be met The requirement of intensity.
But, due to PE100 Raw material processing mobility it is poor, with this raw material production water-feeding pipes product, during extrusion Discharging speed is slow, low production efficiency, and axial cut and irregular indenture easily occurs in pipe material inner wall, outer pipe wall low in glossiness, Tubing long-time can scaling using rear inwall.In actual production process, using PE100 raw materials conforming product rate is often resulted in Lowly, increased the manufacturing cost of enterprise.
The content of the invention
It is an object of the invention to provide a kind of PE tubing by PE100 raw material production, the very smooth light of the tubing inside and outside wall Sliding, inwall is difficult scaliness, and production efficiency is high.Present invention also offers the preparation method and equipment of the PE tubing.
For achieving the above object, the technical scheme is that：A kind of PE tubing, the PE tubing includes following weight portion Several components：
90~110 parts of PE100；
0.5~3 part of functional master batch；
1~4 part of color masterbatch of concentration；
The functional master batch includes the component of following parts by weight：
In the functional master batch, with linear low density polyethylene as carrier, with tetrafluoroethene-perfluorinated alkoxy vinyl Ether copolymer is processing aid, with erucyl amide as dispersant, and coordinates titanate coupling agent.In extrusion process, tool There is the tetrafluoroethene-perfluorinated alkoxy vinyl ether copolymer of low-surface-energy（PFA processing aids）Particle migration is to bath surface Machine barrel, screw rod, the metal surface of die head with extruder is contacted, gradually the metal surface inside polymer melt and extruder Between formed can make smooth " coating " for flowing through of PE100 melts.This " migration " and " coating " causes PE100 melts and metal watch Adhesion strength between face declines, while shearing stress there has also been being decreased obviously.So, the tubing surfaces externally and internally flatness and light of extrusion Slippery is all very good, and because stream resistance is little, discharging speed is fast, and the yield that can make the unit interval is greatly improved, and is carried significantly The high production efficiency of tubing.
Further, the concentration color masterbatch includes the composition of following parts by weight：
85~90 parts of Low Density Polyethylene；
0.5~2 part of white carbon black；
10~15 parts of barium laurate.
Wherein, color masterbatch is concentrated with Low Density Polyethylene（LDPE）For carrier, with white carbon black as coloring agent, it is with barium laurate Dispersant.
The preparation method of PE tubing of the present invention is：
Each component is first weighed, and each component is put into successively in batch mixer, mix homogeneously is mixed at 70 DEG C -90 DEG C Material, compound screw extruder extrusion molding, in extrusion, extruder temperature is 40 DEG C~60 DEG C, and barrel temperature is 170 DEG C ~185 DEG C, mold temperature is 190 DEG C~200 DEG C；Using vacuum cooled sizing method tubing is carried out cooling down after tube extrusion and determined Type, vacuum is -0.02MPa~-0.04MPa during cooling, and chilling temperature is 15 DEG C~20 DEG C.
Equipment used in the preparation method of PE tubing of the present invention, the equipment be screw extruder, screw rod The screw-rod structure of extruder is sequentially provided with solid phase section, solid-liquid and replaces section, barrier screen and pin section, screw rod along the feed direction of raw material Solid phase section be provided with a spiral helicine screw thread axially along a screw, the solid-liquid of screw rod replaces section and is provided with two spirals axially along a screw The screw thread of shape, forms solid phase and the alternate two kinds of screw channels of liquid phase between two screw threads, the barrier screen is spaced sets axially along a screw More than two spiral helicine grooves are put, groove one end is opening, and the other end is sealing, and the opening direction of adjacent grooves is contrary；Institute State pin section and be provided with pin axially vertical with screw rod and annular more than at two.
The screw extruder of the present invention adopts the screw-rod structure of the above, compound to enter from the solid phase section of screw rod, Ran Houjing Heating, constituent part melting, compound subsequently enters two screw channels that solid-liquid replaces section, and two screw channels are respectively used to take up solid phase And liquid phase.After compound replaces section out from solid-liquid, most of compound has been melted, and molten solid phase mixing material is not passed through for part The groove of barrier screen, is blocked in groove, until be heated to form after liquid phase from the opening of groove flowing out；Finally, compound is entered Pin section, the ring-type pin that pin section is arranged smashes in the solid phase mixing material of a small amount of residual, between increase solid fragment and melt Heat transfer area, make the complete fusion plastification of compound.
The present invention this compound high-efficiency screw structure of separation-barrier-pin using more than, in relatively low processing temperature Can just make compound plasticizing uniform down, significantly less energy consumption.Its structure is made during compound extrusion, melts at different levels Pressure is relatively balanced, and pressure oscillation is little, so that extruding pipe material product inside and outside wall flatness is good.And, this screw-rod structure so that Transporting velocity of the compound in barrel is greatly improved, and extrusion efficiency is also just significantly improved.
The present invention by formulating of recipe for pipes, preparation method, process equipment improvement, using the tubing of PE100 raw material production Inside and outside wall very flat smooth, on the premise of original mechanical strength is kept, not only solves inwall during pipeline use and easily accumulates The problem of incrustation scale, and production efficiency and conforming product rate are significantly improved, substantially reduce the manufacturing cost of product.
With reference to the accompanying drawings and detailed description the present invention is further detailed explanation for description of the drawings：
Fig. 1 is the structural representation of screw rod of the present invention.
The present invention is further detailed explanation with reference to specific embodiment for specific embodiment：
A kind of PE tubing of the present invention, the PE tubing includes the component of following parts by weight：
90~110 parts of PE100；
0.5~3 part of functional master batch；
1~4 part of color masterbatch of concentration；
The functional master batch includes the component of following parts by weight：
The preparation method of PE tubing of the present invention is：
Each component is first weighed, and each component is put into successively in batch mixer, mix homogeneously forms mixing at 70-90 DEG C Material, compound screw extruder extrusion molding, in extrusion, extruder temperature is 40 DEG C~60 DEG C, and barrel temperature is 170 DEG C ~185 DEG C, mold temperature is 190 DEG C -200 DEG C；Cooling and shaping is carried out to tubing using vacuum cooled sizing method after tube extrusion, Vacuum is -0.02MPa~-0.04MPa during cooling, and chilling temperature is 15 DEG C~20 DEG C.
Embodiment 1
The preparation method of PE tubing is：
1）First weigh each component by formula：
90 parts of PE100；
0.5 part of functional master batch；
4 parts of color masterbatch of concentration；
The functional master batch includes the component of following parts by weight：
The concentration color masterbatch includes the composition of following parts by weight：
85 parts of Low Density Polyethylene；
2 parts of white carbon black；
10 parts of barium laurate.
2）Each component is put into successively in batch mixer, mix homogeneously forms compound at 70 DEG C, compound is squeezed with screw rod Go out machine extrusion molding, in extrusion, extruder temperature is 60 DEG C, and barrel temperature is 170 DEG C, and mold temperature is 200 DEG C；Tubing is squeezed Cooling and shaping is carried out to tubing using vacuum cooled sizing method after going out, vacuum is -0.02MPa during cooling, and chilling temperature is 15 DEG C~20 DEG C.
Embodiment 2
The preparation method of PE tubing is：
1）First weigh each component by formula：
110 parts of PE100；
3 parts of functional master batch；
1 part of color masterbatch of concentration；
The functional master batch includes the component of following parts by weight：
The concentration color masterbatch includes the composition of following parts by weight：
90 parts of Low Density Polyethylene；
0.5 part of white carbon black；
15 parts of barium laurate.
2）Each component is put into successively in batch mixer, mix homogeneously forms compound at 90 DEG C, compound is squeezed with screw rod Go out machine extrusion molding, in extrusion, extruder temperature is 40 DEG C, and barrel temperature is 185 DEG C, and mold temperature is 190 DEG C；Tubing is squeezed Cooling and shaping is carried out to tubing using vacuum cooled sizing method after going out, vacuum is -0.04MPa during cooling, and chilling temperature is 15 DEG C~20 DEG C.
Embodiment 3
The preparation method of PE tubing is：
1）First weigh each component by formula：
100 parts of PE100；
2 parts of functional master batch；
2 parts of color masterbatch of concentration；
The functional master batch includes the component of following parts by weight：
The concentration color masterbatch includes the composition of following parts by weight：
87 parts of Low Density Polyethylene；
1.0 parts of white carbon black；
12 parts of barium laurate.
2）Each component is put into successively in batch mixer, mix homogeneously forms compound at 80 DEG C, compound is squeezed with screw rod Go out machine extrusion molding, in extrusion, extruder temperature is 50 DEG C, and barrel temperature is 180 DEG C, and mold temperature is 195 DEG C；Tubing is squeezed Cooling and shaping is carried out to tubing using vacuum cooled sizing method after going out, vacuum is -0.03MPa during cooling, and chilling temperature is 15 DEG C~20 DEG C.
Equipment used in the preparation method of PE tubing of the present invention, the equipment be screw extruder, screw extruder Screw-rod structure be sequentially provided with solid phase section 1, solid-liquid along the feed direction of raw material and replace section 2, barrier screen 3 and pin section 4, screw rod Solid phase section 1 is provided with axially along a screw a spiral helicine screw thread 11, and the solid-liquid of screw rod replaces section 2 and is provided with two spiral shells axially along a screw The screw thread 21,22 of rotation shape, forms solid phase and the alternate two kinds of screw channels 23,24 of liquid phase between two screw threads, the barrier screen 3 is along spiral shell Bar axially spaced-apart arranges more than two spiral helicine grooves 31, and the one end of groove 31 is opening 32, and the other end is sealing, adjacent grooves 31 opening 32 is in opposite direction；The pin section 4 is provided with pin 41 axially vertical with screw rod and annular more than at two.
The screw extruder of the present invention adopts the screw-rod structure of the above, compound to enter from the solid phase section 1 of screw rod, Ran Houjing Heating, constituent part melting, compound subsequently enters two screw channels 23,24 that solid-liquid replaces section 2, and two screw channels 23,24 are distinguished For taking up solid phase and liquid phase.After compound replaces section 2 out from solid-liquid, most of compound has been melted, what part was not melted Solid phase mixing material is blocked in groove 31 through the groove 31 of barrier screen 3, until being heated to form after liquid phase the opening from groove 31 32 flow out；Finally, compound enters pin section 4, and the ring-type pin 41 that pin section 4 is arranged beats in the solid phase mixing material of a small amount of residual It is broken, increase the heat transfer area between solid fragment and melt, make the complete fusion plastification of compound.
Production efficiency can be significantly improved using the component of the present invention, preparation method and equipment：Compared with prior art, this skill Art production efficiency can improve 15%-30%.It is concrete as shown in table 1.
The tubing of the production of 1 embodiment of the present invention of table 3 is contrasted with the production efficiency of existing production technology（Unit：Ton/8 hours）
The present invention can significantly improve duct products inside and outside wall flatness and smoothness, in the premise for keeping original mechanical strength Under, the problem of the easy scaliness of inwall during effectively solving pipeline use.

Claims (3)

1. a kind of PE tubing, it is characterised in that：The PE tubing includes the component of following parts by weight：
90 ~ 110 parts of PE100；
0.5 ~ 3 part of functional master batch；
1 ~ 4 part of color masterbatch of concentration；
The functional master batch includes the component of following parts by weight：
80 ~ 90 parts of linear low density polyethylene；
Tetrafluoroethene -4 ~ 5 parts of perfluorinated alkoxy vinyl ether copolymer；
5 ~ 10 parts of erucyl amide；
0.5 ~ 1 part of titanate coupling agent.
2. PE tubing according to claim 1, it is characterised in that：The concentration color masterbatch includes the group of following parts by weight Into：
85 ~ 90 parts of Low Density Polyethylene；
0.5 ~ 2 part of white carbon black；
10 ~ 15 parts of barium laurate.
3. the preparation method of PE tubing as claimed in claim 1 or 2, it is characterised in that：The preparation method is：
Each component is first weighed, and each component is put into successively in batch mixer, mix homogeneously obtains compound at 70 DEG C -90 DEG C, Compound screw extruder extrusion molding, in extrusion, extruder temperature is 40 DEG C ~ 60 DEG C, and barrel temperature is 170 DEG C ~ 185 DEG C, mold temperature is 190 DEG C ~ 200 DEG C；Cooling and shaping is carried out to tubing using vacuum cooled sizing method after tube extrusion, is cooled down When vacuum be -0.02MPa ~ -0.04MPa, chilling temperature be 15 DEG C ~ 20 DEG C.
CN201410152486.0A 2014-04-16 2014-04-16 PE (polyethylene) tubular product and preparation method thereof as well as equipment Expired - Fee Related CN103923372B (en)

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