WO2013149369A1 - 聚乙烯电缆导管 - Google Patents

聚乙烯电缆导管 Download PDF

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Publication number
WO2013149369A1
WO2013149369A1 PCT/CN2012/001517 CN2012001517W WO2013149369A1 WO 2013149369 A1 WO2013149369 A1 WO 2013149369A1 CN 2012001517 W CN2012001517 W CN 2012001517W WO 2013149369 A1 WO2013149369 A1 WO 2013149369A1
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WO
WIPO (PCT)
Prior art keywords
polyethylene
parts
temperature
screw
cable conduit
Prior art date
Application number
PCT/CN2012/001517
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English (en)
French (fr)
Inventor
吴锡炎
Original Assignee
Wu Xiyan
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Filing date
Publication date
Application filed by Wu Xiyan filed Critical Wu Xiyan
Publication of WO2013149369A1 publication Critical patent/WO2013149369A1/zh

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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
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098—Metal salts of carboxylic acids
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions 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; Compositions of derivatives of such polymers
    • C08L27/02—Compositions 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; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions 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; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08L27/18—Homopolymers or copolymers or tetrafluoroethene
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0041—Optical brightening agents, organic pigments
    • 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
    • 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
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0462—Tubings, i.e. having a closed section

Definitions

  • the present invention relates to a conduit for laying a cable, and more particularly to a polyethylene cable conduit. Background technique
  • Polyethylene pipe (PE pipe) is light in weight, easy to repair, install and maintain, easy to transport, good in stress crack resistance, excellent in low temperature impact resistance, and excellent in deflection, rigidity, flexibility and creep resistance.
  • the existing polyethylene pipe has tensile strength and impact strength, and has poor wear resistance, which is not suitable for pipe jacking construction.
  • Pipe jacking technology is a non-opening jacking pipe jacking technology for municipal construction. The advantage is that it does not affect the surrounding environment or has less impact, the construction site is small, the noise is small, and it can be deeply underground.
  • the technical problem to be solved by the present invention is to provide a polyethylene cable conduit which has relatively high tensile strength, impact strength and wear resistance.
  • the technical solutions adopted are as follows:
  • a polyethylene cable conduit characterized by being made of a modified polyethylene material; the composition of the modified polyethylene material is 100 parts by weight, 1 to 5 parts of EPDM rubber, and poly 4 0 ⁇ The fluoroethylene 0. 1 - 1 part, calcium stearate 0. 1-1 parts, polyethylene wax 0. 1-1 parts, pigment 0. 01-0. 1 part, of which the base material is 85-95% (weight ) ⁇ density polyethylene and 5-15% by weight of ultra-molecular weight polyethylene.
  • the polyethylene cable conduit of the present invention can be formed by extrusion molding the above modified polyethylene material.
  • the high-density polyethylene (HDPE) melt flow rate (MFR) is 0. 2-1. 5g/10min (g/10 minutes)
  • the modified polyethylene material of the present invention is mainly composed of high density polyethylene (HDPE) and Ultra high molecular weight polyethylene (UHMWPE) constitutes the use of ultra high molecular weight polyethylene, which makes the polyethylene cable conduit have higher tensile strength and impact strength, and also improves the wear resistance of polyethylene cable conduit. . Excellent
  • the ultrafine molecular weight polyethylene is selected to have an average molecular weight of 1 X 10 6 - 3 X 10 6 .
  • EPDM improves the impact resistance of the material, especially the low temperature impact resistance, making the polyethylene cable conduits have a very low temperature embrittlement temperature.
  • the ethylene propylene diene rubber has a Mooney viscosity of 30 to 60.
  • Polytetrafluoroethylene (PTFE) enhances the wear resistance of the material and works with ultra-high molecular weight polyethylene to make the resulting polyethylene cable conduit more wear resistant.
  • calcium stearate can reduce the internal friction between the melts of polymer materials and improve the processing properties of the materials.
  • Adding ultra-molecular weight polyethylene, ethylene propylene diene monomer and polytetrafluoroethylene will increase the melt viscosity of the material melt, so an appropriate amount of calcium stearate is added to improve the lubricity of the material during processing.
  • Polyethylene wax (PE wax) acts as an external lubricant to reduce the friction between the material melt and the processing equipment and improve the processing properties of the material.
  • the above pigments also commonly referred to as toners
  • toners are selected according to the customer's requirements for the color of the cable conduit.
  • the method of manufacturing the polyethylene cable conduit of the present invention comprises the steps of:
  • modified polyethylene material high density polyethylene, ultra high molecular weight polyethylene, ethylene propylene diene monomer, polytetrafluoroethylene, calcium stearate, polyethylene wax and pigment according to the above ratio; Tetrafluoroethylene, calcium stearate, polyethylene wax and pigment are placed in a plastic bag for preliminary mixing (usually after filling polytetrafluoroethylene, calcium stearate, polyethylene wax and pigment into a plastic bag and sealing the bag) , shake the plastic bag for 3 - 5 minutes) to obtain the preliminary mixture; then add the preliminary mixture, high-density polyethylene, ultra-high molecular weight polyethylene and EPDM rubber to the high-speed mixer, using the stirrer Stir for 10 - 15 minutes, stirrer speed is 250-400rpm (rev / min), make high-density polyethylene, ultra-molecular weight polyethylene, EPDM, PTFE, calcium stearate, polyethylene The wax and the pigment are uniformly mixed to obtain a whole mixture
  • the two screws of the above twin-screw extruder rotate in the same direction.
  • the rotation speed of the screw is 200-300r P m (rev/min), and the material is forwardly conveyed when conveying the material; the twin-screw extruder can subject the material to the molten state. Good shearing and mixing to make the material plasticized better and more uniform.
  • the portion of the above-mentioned twin-screw extruder from the feed port to the extrusion die is the first zone, the second zone, the third zone and the fourth zone, and the temperature of the first zone is 150-170 °C.
  • the temperature in the second zone is 170-180 ° C
  • the temperature in the third zone is 180-190 ° C
  • the temperature in the fourth zone is 190-210 ° C
  • the temperature of the extrusion die is 200-210 ° C.
  • the screw of the third zone has a return screw on the screw to make the melt plasticization better and more uniform.
  • the degree of vacuum in the barrel of the twin-screw extruder is 0. 02-0. 06MPa, the water vapor, the air, etc. in the material can be removed by vacuuming, so that the modified polyethylene material can be free of bubbles. Better performance.
  • the self-forming die is extruded (the molding die has a ring-shaped discharge port) Then, through a vacuum sizing, cooling and pulling operation, a polyethylene cable conduit is obtained. The marking can then be printed on the polyethylene cable guide and cut and packaged.
  • the portion of the screw of the extrusion molding machine from the feed port to the forming die is a screw conveying section, a screw compression section and a screw homogenizing section, and the temperature of the screw conveying section is 140-160 ° C, and the screw compression section is The temperature is 160-170 ° C, the temperature of the screw homogenization section is 175-190 ° C, and the temperature of the forming die is 200-240 V.
  • the screw has a rotational speed of 300 to 450 rpm (revolutions per minute). 0 ⁇ 06. 06MPa ⁇ The vacuum is 0. 02-0. 06MPa.
  • Polyethylene cable conduit according to the present invention has the following excellent properties: (1) high tensile strength, up to 25. 8 MPa; (2) high impact strength, impact strength measured at 23 ° C ambient temperature strength of 23. 5KJ /m 2 ; Excellent low temperature impact resistance, low temperature embrittlement temperature is extremely low, can be safely used in the temperature range of -20- 60 °C; in winter construction, due to its good impact resistance, no brittle cracking occurs; 3) Good wear resistance, its wear resistance is 4 times that of metal pipe; (4) Good toughness, deflection, good shock resistance, elongation at break exceeding 500%, adapt to uneven foundation settlement and dislocation Very strong, small diameter pipe can be bent freely; (5) Good resistance to stress cracking, low notch sensitivity, high resistance to shear strength, and high environmental stress resistance (6) It has good rigidity, good flexibility and creep resistance; (7) Corrosion resistance, resistance to erosion by various chemical media, no need for anti-corrosion treatment, no promotion of algae, bacteria Or fungus growth; (8) smooth pipe wall
  • the polyethylene cable conduit of the invention is widely used in the pipeline system of the communication cable and the power cable, and includes the inter-office trunk pipeline, the feeder pipeline, the wiring pipeline and the special pipeline, etc.; has strong practicability and is suitable for cables, wires and the like.
  • the cable is worn and has good isolation and protection. It can be used for pipe jacking construction and is applied to trenchless works that pass through obstacles.
  • the polyethylene cable conduit of the embodiment is made of a modified polyethylene material; the composition of the modified polyethylene material is 85 parts of high-density polyethylene, 15 parts of ultra-high molecular weight polyethylene, and 3:3 by weight. ⁇
  • modified polyethylene material 85 parts of high-density polyethylene (melt flow rate of high-density polyethylene is 0.2 g/10 min), ultra-high molecular weight polyethylene 15 parts (average of ultra-high molecular weight polyethylene) The molecular weight is 1 ⁇ 10 ⁇ —1. 5 ⁇ 10 6 ), 3 parts of ethylene propylene diene rubber (the Mooney viscosity of EPDM is 60), 0.1 parts of polytetrafluoroethylene, calcium stearate 0 1 part, 0.
  • polytetrafluoroethylene, calcium stearate, polyethylene wax and pigment are put into a plastic bag for preliminary mixing (polytetrafluoroethylene, After the calcium stearate, polyethylene wax and pigment are placed in a plastic bag and sealed at the mouth of the bag, shake the plastic bag for 3 minutes to obtain the preliminary mixture; then the preliminary mixture, ⁇ density polyethylene, ultra high molecular weight poly Ethylene and EPDM rubber are added to the high-speed mixer, stirred for 10 minutes with a stirrer, and the stirrer rotates at 400 rpm (rev/min) to make high-density polyethylene, ultra-molecular-weight polyethylene, EPDM.
  • Rubber, polytetrafluoroethylene, calcium stearate, polyethylene wax and pigment blend Evenly, to obtain a whole mixture; then the whole mixture is added to a twin-screw extruder for blending and extrusion, and then Granulation to obtain granulated modified polyethylene material (the whole mixture can be added to the twin-screw extruder from the feed port of the twin-screw extruder, and after being blended in the barrel, the self-extrusion die is extruded.
  • a strip of material after the strip is water-cooled, it is pelletized by a pelletizer to obtain a granular modified polyethylene material);
  • the two screws of the above twin-screw extruder are rotated in the same direction, and the rotation speed of the screw is 200r P m (rev/min); the portion of the twin-screw extruder from the feed port to the extrusion die
  • the first zone, the second zone, the third zone and the W zone are in turn, the temperature of the first zone is 150 ° C, the temperature of the second zone is 170 ° C, and the temperature of the first zone is 180 ° C, the fourth
  • the temperature of the vacuum in the cylinder of the twin-screw extruder is 0. 02MPa o .
  • the temperature in the cylinder of the twin-screw extruder is 0. 02MPa o
  • the screw from the feed port to the forming die of the above extrusion molding machine is a screw conveying section, a screw compression section and a screw homogenizing section, the temperature of the screw conveying section is 140 ⁇ , and the temperature of the screw compression section is 160°. C, the temperature of the screw homogenization section is 175 ° C, the temperature of the forming die is 200 ° C ; the rotation speed of the screw is 450 rpm (rev / min). 02MPa o
  • the vacuum in the barrel of the extruder is 0. 02MPa o
  • the polyethylene cable conduit of the embodiment is made of a modified polyethylene material; the composition of the modified polyethylene material is 90 parts of high-density polyethylene, 10 parts of ultra-high molecular weight polyethylene, and EPDM by weight. 5 ⁇ Pigment 0. 2 parts, 0. 2 parts, 0. 2 parts, 0.1 parts of pigment.
  • the above method for manufacturing a polyethylene cable conduit includes the following steps:
  • modified polyethylene material 90 parts of high-density polyethylene (melt flow rate of high-density polyethylene is 1. 5g/10min), ultra-high molecular weight polyethylene of 10 parts (average of ultra-high molecular weight polyethylene) a molecular weight of 2.
  • EPDM ethylene propylene diene rubber has a Mooney viscosity of 30
  • polytetrafluoroethylene, of calcium stearate 0.2 Parts, polyethylene wax 0.2 parts, pigment 0.1 parts
  • polytetrafluoroethylene, calcium stearate, polyethylene wax and pigments are put into a plastic bag for preliminary mixing (polytetrafluoroethylene, stearic acid) After the calcium acid, polyethylene wax and pigment are put into the plastic bag and the bag is sealed, the hand is plasticized.
  • the bag was shaken for 4 minutes) to obtain a preliminary mixture; then the preliminary mixture, high-density polyethylene, ultra-high molecular weight polyethylene and EPDM rubber were added together to a high-speed mixer, stirred with a stirrer for 15 minutes, and stirred.
  • the rotation speed of the device is 250 rpm (revolutions per minute), so that the ⁇ density polyethylene, the ultra-molecular weight polyethylene, the ethylene propylene diene monomer, the polytetrafluoroethylene, the calcium stearate, the polyethylene wax and the pigment are uniformly mixed to obtain an overall mixture.
  • the whole mixture is added to a twin-screw extruder for blending and extrusion, and then granulated to obtain a granulated modified polyethylene material (the whole mixture can be fed from a twin-screw extruder)
  • the mouth is added to the twin-screw extruder, and after being blended in the barrel, the strip is extruded from the extrusion die; after the strip is water-cooled, it is pelletized by a pelletizer to obtain a granular modified polyethylene material. );
  • the two screws of the twin-screw extruder are rotated in the same direction, and the rotation speed of the screw is 250 rpm (revolutions per minute); the portion of the twin-screw extruder from the feed port to the extrusion die is in turn Zone I, Zone II, Zone III and Zone IV, temperature in Zone I is 155 °C, temperature in Zone II is 175 °C, temperature in Zone III is 185 °C, temperature in Zone IV At 195 ° C, the temperature of the extrusion die was 205 ° C.
  • the screw of the third zone has a return screw. 0. 03MPa ⁇
  • the vacuum in the cylinder of the twin-screw extruder is 0. 03MPa.
  • the screw from the feed port to the forming die of the above extrusion molding machine is a screw conveying section, a screw compression section and a screw homogenizing section, and the temperature of the screw conveying section is 145 ° C, and the temperature of the screw compression section
  • the temperature of the screw homogenization section is 180 ° C
  • the temperature of the forming die is 210 ° C
  • the rotation speed of the screw is 350 rpm (rev / min).
  • 05MPa ⁇ The vacuum in the barrel of the extruder is 0. 03MPa.
  • the polyethylene cable conduit of the embodiment is made of a modified polyethylene material; the composition of the modified polyethylene material is 95 parts of high-density polyethylene, 5 parts of ultra-high molecular weight polyethylene, and EPDM by weight. 5 ⁇ 5 parts of rubber, PTFE, 0.3 parts, 1 part of calcium stearate, 1 part of polyethylene wax, pigment 0. 05 parts.
  • the method for manufacturing the above polyethylene cable conduit includes the following steps -
  • modified polyethylene material 95 parts of ⁇ density polyethylene (melt flow rate of high density polyethylene is 0.8 g/10 min), ultra high molecular weight polyethylene 5 parts (average of ultra high molecular weight polyethylene) Minute The amount of the material is 1. 5X 10 6 — 2X 10 6 ), 5 parts of ethylene propylene diene rubber (the Mooney viscosity of EPDM is 50), 0.3 parts of polytetrafluoroethylene, 1 part of calcium stearate. 1 part of polyethylene wax, 0.
  • the propylene rubber is added together to the high-speed mixer, stirred by a stirrer for 14 minutes, and the stirrer rotates at 350 rpm (rev/min) to make high-density polyethylene, ultra-high molecular weight polyethylene, EPDM rubber, polytetra Fluorine, calcium stearate, polyethylene wax and pigment are uniformly mixed to obtain a whole mixture; then the whole mixture is added to a twin-screw extruder for blending and extrusion, and then granulated to obtain a granular modification.
  • Polyethylene material (the whole mixture can be self-screwed)
  • the feed port of the extruder is added to the twin-screw extruder, and after being blended in the barrel, the strip is extruded from the extrusion die; after the strip is water-cooled, it is pelletized by a pelletizer to obtain a pellet.
  • Modified polyethylene material
  • the two screws of the above twin-screw extruder rotate in the same direction, and the rotation speed of the screw is 300 rpm (revolutions per minute); the portion of the twin-screw extruder from the feed inlet to the extrusion die is in turn In Zone I, Zone II, Zone III and Zone IV, the temperature in Zone I is 170 °C, the temperature in Zone II is 180 °C, the temperature in Zone III is 190 °C, and the temperature in Zone IV is At 200 ° C, the temperature of the extrusion die was 210 °C.
  • the screw of the third zone has a return screw.
  • the pressure in the cylinder of the twin-screw extruder was 0.06 MPa.
  • the screw from the feed port to the forming die of the above extrusion molding machine is a screw conveying section, a screw compression section and a screw homogenizing section, and the temperature of the screw conveying section is 150 ° C, and the temperature of the screw compression section is 170 ⁇ , the temperature of the screw homogenization section is 185 ° C, the temperature of the forming die is 220 ° C; the rotation speed of the screw is 400 rpm (rev / min). 05MPa ⁇ The vacuum in the barrel of the extruder is 0. 06MPa.
  • the polyethylene cable conduit of the embodiment is made of a modified polyethylene material; the composition of the modified polyethylene material is 88 parts of high density polyethylene, 12 parts of ultra high molecular weight polyethylene, and EPDM by weight. 5 ⁇
  • the pigment is 1 part, the PTFE is 1 part, the calcium stearate is 0.5 parts, the polyethylene wax is 0.5 parts, the pigment is 0.03 parts.
  • the above method for manufacturing a polyethylene cable conduit includes the following steps:
  • modified polyethylene material 88 parts of high-density polyethylene (melt flow rate of high-density polyethylene is lg/10min), and 12 parts of ultra-high molecular weight polyethylene (the average molecular weight of ultra-high molecular weight polyethylene is L 8X 10 6 - 2. 2X 10 6), 1 part of ethylene propylene diene rubber (EPDM Mooney viscosity of 40), 1 part of polytetrafluoroethylene, 0.5 parts of calcium stearate, polyethylene 0 ⁇ , 0.
  • polytetrafluoroethylene, calcium stearate, polyethylene wax and pigment are put into a plastic bag for preliminary mixing (polytetrafluoroethylene, calcium stearate, After the polyethylene wax and pigment are packed in a plastic bag and sealed at the mouth of the bag, shake the bag with a plastic bag for 5 minutes to obtain a preliminary mixture; then mix the preliminary mixture, high density polyethylene, ultra high molecular weight polyethylene and triple B
  • the propylene rubber is added together to the high-speed mixer, stirred by a stirrer for 15 minutes, and the stirrer rotates at 300 rpm (rev/min) to make high-density polyethylene, ultra-high molecular weight polyethylene, EPDM rubber, and polytetrafluoroethylene.
  • Ethylene, calcium stearate, polyethylene wax and pigment blend the whole mixture is obtained; then the whole mixture is added to the twin-screw extruder for blending and extrusion, and then granulated to obtain a granular modified polyethylene material (the whole mixture can be extruded from the twin-screw
  • the feed port of the machine is added to the twin-screw extruder, and after blending in the barrel, the strip is extruded from the extrusion die; after the strip is water-cooled, it is pelletized by a pelletizer to obtain a granular modification.
  • Polyethylene material Polyethylene material
  • the two screws of the above twin-screw extruder rotate in the same direction, and the rotation speed of the screw is 300r P m (rev/min); the portion of the twin-screw extruder from the feed port to the extrusion die
  • the first zone, the second zone, the third zone and the fourth zone are in turn, the temperature of the first zone is 170 ° C, the temperature of the second zone is 180 ° C, and the temperature of the third zone is 190 ⁇ , the zone IV
  • the temperature was 210 ° C and the temperature of the extrusion die was 210 ° C.
  • the screw on the third zone has a return screw. 05MPa ⁇
  • the vacuum in the cylinder of the twin-screw extruder is 0. 05MPa.
  • the screw from the feed inlet to the forming die of the above extrusion molding machine is a screw conveying section, a screw compression section and a screw homogenizing section, and the temperature of the screw conveying section is 160 ° C, and the temperature of the screw compression section is 170 ° C, the temperature of the screw homogenization section is 190 'C, the temperature of the forming die is 240 ° C; the speed of the screw It is 450 rpm (rev / min).
  • 05MPa ⁇ The vacuum in the barrel of the extruder is 0. 05MPa.

Abstract

一种聚乙烯电缆导管，其由改性聚乙烯材料制成；按重量计，所述改性聚乙烯材料的组成为基料100份、三元乙丙橡胶1—5份、聚四氟乙烯0.1—1份、硬脂酸钙0.1—1份、聚乙烯蜡0.1—1份、颜料0.01—0.1份，其中基料由85—95重量％的高密度聚乙烯和5—15重量％的超高分子量聚乙烯组成。该聚乙烯电缆导管具有下述优良性能：（1）拉伸强度高；（2）冲击强度高；低温抗冲击性能优异，其低温脆化温度极低，可在-20—60°C温度范围内安全使用；（3）耐磨性好；（4）韧性、挠度好，抗震性好；（5）抗应力开裂性好，缺口敏感性低；（6）耐腐蚀，使用寿命长；（7）穿缆容易。

Description

聚乙烯电缆导管
技术领域
本发明涉及敷设电缆所用的导线管， 具体地说， 涉及一种聚乙烯电缆导管。 背景技术
聚乙烯管材（PE管材）重量轻， 维修、 安装施工、 保养方便， 易于运输， 抗应力开裂性好， 低温抗冲击性能优异， 挠度、 刚性、 柔性、 耐蠕变性能均较 好。 但是现有的聚乙烯管材拉伸强度、 冲击强度不髙， 且耐磨性不好， 不适合 用于顶管施工 （顶管技术是一项用于市政施工的非开挖掘进式顶管技术， 其优 点在于不影响周围环境或者影响较小， 施工场地小， 噪音小， 而且能够深入地 下作业）。
发明内容
本发明所要解决的技术问题是提供一种聚乙烯电缆导管， 这种聚乙烯电缆 导管具有较髙的拉伸强度、 冲击强度及耐磨性能。 采用的技术方案如下：
一种聚乙烯电缆导管， 其特征在于由改性聚乙烯材料制成； 按重量计， 所 述改性聚乙烯材料的组成为基料 100份、三元乙丙橡胶 1一 5份、聚四氟乙烯 0. 1 一 1份、 硬脂酸钙 0. 1— 1份、 聚乙烯蜡 0. 1— 1份、 颜料 0. 01—0. 1份， 其中 基料由 85— 95% (重量）的髙密度聚乙烯和 5— 15% (重量）的超髙分子量聚乙烯 组成。
本发明的聚乙烯电缆导管可采用上述改性聚乙烯材料经挤出成型制成。 优选高密度聚乙烯 （HDPE) 的熔体流动速度 （MFR)为 0. 2-1. 5g/10min (克 /10分钟) 本发明的改性聚乙烯材料主要由高密度聚乙烯 （HDPE) 和超高分子量聚乙 烯 （UHMWPE)构成， 超高分子量聚乙烯的使用， 使制成的聚乙烯电缆导管具有 了较高的拉伸强度和冲击强度， 同时也提高了聚乙烯电缆导管的耐磨性能。 优
1
确认本 选超髙分子量聚乙烯的平均分子量为 1 X 106— 3 X 106。 三元乙丙橡胶（EPDM) 可提高材料的抗冲击性能， 特别是低温抗冲击性能 优异， 使制成的聚乙烯电缆导管低温脆化温度极低。 优选三元乙丙橡胶的门尼 粘度为 30-60。 聚四氟乙烯 （PTFE) 能够增强材料的耐磨性， 与超高分子量聚乙烯配合， 使制成的聚乙烯电缆导管耐磨性更好。 硬脂酸钙作为内润滑剂， 可以降低高分子材料熔体之间内摩擦， 提高材料 的加工性能。 加入超髙分子量聚乙烯、 三元乙丙橡胶和聚四氟乙烯后， 会提高 材料熔体的熔融粘度， 因此加入适量的硬脂酸钙， 以提髙材料在加工时的润滑 性。 聚乙烯蜡（PE蜡） 作为外润滑剂， 可以降低材料熔体与加工设备之间的摩 擦力， 提高材料的加工性能。 上述颜料（通常也称为色粉）根据客户对电缆导管颜色的要求选用。
优选本发明的聚乙烯电缆导管的制造方法包括下述步骤：
( 1 )制备改性聚乙烯材料： 按上述比例配备高密度聚乙烯、 超高分子量聚 乙烯、 三元乙丙橡胶、 聚四氟乙烯、 硬脂酸钙、 聚乙烯蜡和颜料； 然后将聚四 氟乙烯、 硬脂酸钙、 聚乙烯蜡和颜料装入塑料袋中进行初步混合（通常将聚四 氟乙烯、 硬脂酸钙、 聚乙烯蜡和颜料装入塑料袋中并密封袋口后， 手拿塑料袋 摇动 3— 5分钟） ， 得到初步混合料； 然后将初步混合料、 高密度聚乙烯、 超高 分子量聚乙烯和三元乙丙橡胶一起加入到高速混合机中，利用搅拌器搅拌 10 - 15 分钟， 搅拌器的转速为 250-400rpm (转 /分钟） ， 使高密度聚乙烯、 超髙分子量 聚乙烯、 三元乙丙橡胶、 聚四氟乙烯、 硬脂酸钙、 聚乙烯蜡和颜料混合均匀， 得到整体混合料； 然后将整体混合料加入到双螺杆挤出机中进行共混挤出， 再 进行造粒， 得到颗粒状的改性聚乙烯材料 （一种具体方案中， 整体混合料自双 螺杆挤出机的进料口加入到双螺杆挤出机中， 在料筒中进行共混后， 自挤出口 模挤出料条； 料条经过水冷后， 再经过切粒机切粒， 得到颗粒状的改性聚乙烯 材料)；
上述双螺杆挤出机的两个螺杆是同向转动的，螺杆的转速为 200- 300rPm (转 /分钟）， 输送物料时是正向输送； 双螺杆挤出机能使物料在熔融状态下受到良 好的剪切、 混合作用， 使物料塑化更好、 更加均匀。 上述双螺杆挤出机的料筒 自进料口至挤出口模之间的部分依次为第 I区、 第 Π区、 第 III区和第 IV区， 第 I区的温度为 150- 170 °C ,第 II区的温度为 170- 180°C ,第 III区的温度为 180-190 °C， 第 IV区的温度为 190- 210°C， 挤出口模的温度为 200- 210°C。 优选第 III区的 螺杆上具有回流螺块， 使熔体塑化更好、 更均匀。 优选双螺杆挤出机料筒内的 真空度为 0. 02-0. 06MPa， 通过抽真空可以抽掉物料中的水汽、 空气等， 这样会 使制得的改性聚乙烯材料中无气泡， 性能更佳。
(2) 制造聚乙烯电缆导管： 将步骤 （1 ) 制得的颗粒状改性聚乙烯材料加 入到挤出成型机中， 用挤出成型的方法制造聚乙烯电缆导管。
改性聚乙烯材料自进料口加入到挤出成型机中后， 经挤出成型机的料筒压 缩、 均化后， 自成型口模挤出成型（成型口模具有环形的出料口）； 然后经真空 定径、 冷却及牵引等操作， 得到聚乙烯电缆导管。 然后可在聚乙烯电缆导管上 喷印标识， 并进行切割和包装。
优选挤出成型机的螺杆自进料口至成型口模之间的部分依次为螺杆输送 段、螺杆压缩段和螺杆均化段， 螺杆输送段的温度为 140- 160°C， 螺杆压缩段的 温度为 160- 170°C，螺杆均化段的温度为 175- 190°C，成型口模的温度为 200-240 V。 优选螺杆的转速为 300- 450rpm (转 /分钟）。 优选挤出成型机料筒内的真空 度为 0. 02-0. 06MPa。
本发明的聚乙烯电缆导管具有下述优良性能： （1 ) 拉伸强度高， 可达 25. 8 MPa; (2)冲击强度高， 环境温度 23°C下测得的冲击强度达 23. 5KJ/m2; 低温抗 冲击性能优异， 其低温脆化温度极低， 可在 -20— 60 °C温度范围内安全使用； 冬 季施工时因其抗冲击性好， 不会发生管子脆裂； （3) 耐磨性好， 其耐磨性是金 属管的 4倍； （4) 韧性、 挠度好， 抗震性好， 其断裂伸长率超过 500%， 对基础 不均匀的地面沉降和错位的适应能力非常强， 小口径管材可任意弯曲； （5) 抗 应力开裂性好， 缺口敏感性低， 抗剪切强度的抗痕能力高， 耐环境应力性非常 突出； （6)既有较好的刚性， 也有很好的柔性、 耐蠕变性； （7) 耐腐蚀， 可耐多 种化学介质的侵蚀，不需防腐处理，也不会促进藻类、细菌或真菌生长； （8)管 壁光滑， 摩擦系数小， 穿缆容易， 施工效率高， 施工成本低； （9) 重量轻， 易 于搬运、 运输， 维修、 安装施工、 保养方便； （10) 连接方便， 连接方法多样， 特别是可采用熔接方式连接， 保证了接口材质、 结构与管体本身的同一性， 实 现了接头与管材的一体化， 密封性能良好； （11 )使用寿命长， 经久耐用， 地埋 管寿命达 50年以上； （12) 电绝缘性能好， 线路运行安全可靠。
本发明的聚乙烯电缆导管广泛应用于通信电缆、 电力电缆的管道系统， 包 括局间中继管道、 馈线管道、 配线管道和专用管道等； 具有很强的实用性， 适 合电缆、 电线等诸多线缆的穿放， 并有很好的隔离和保护。 可用于顶管施工， 应用于穿越障碍物的非开挖工程。
具体实施方式 实施例 1
本实施例的聚乙烯电缆导管由改性聚乙烯材料制成； 按重量计， 所述改性 聚乙烯材料的组成为高密度聚乙悌 85份、 超高分子量聚乙烯 15份、 三元乙丙 橡胶 3份、 聚四氟乙烯 0. 1份、 硬脂酸钙 0. 1份、 聚乙烯蜡 0. 1份、 颜料 0. 01 份。
上述聚乙烯电缆导管的制造方法包括下述步骤：
( 1 ) 制备改性聚乙烯材料： 取高密度聚乙烯 85份 （高密度聚乙烯的熔体 流动速度为 0. 2g/10min)、 超高分子量聚乙烯 15份 （超高分子量聚乙烯的平均 分子量为 1 Χ 10β—1. 5 Χ 106)、 三元乙丙橡胶 3份（三元乙丙橡胶的门尼粘度为 60)、 聚四氟乙烯 0. 1份、 硬脂酸钙 0. 1份、 聚乙烯蜡 0. 1份、 颜料 0. 01份； 然后将聚四氟乙烯、硬脂酸钙、聚乙烯蜡和颜料装入塑料袋中进行初步混合（将 聚四氟乙烯、 硬脂酸钙、 聚乙烯蜡和颜料装入塑料袋中并密封袋口后， 手拿塑 料袋摇动 3分钟） ， 得到初步混合料； 然后将初步混合料、 髙密度聚乙烯、 超 高分子量聚乙烯和三元乙丙橡胶一起加入到高速混合机中， 利用搅拌器搅拌 10 分钟， 搅拌器的转速为 400rpm (转 /分钟） ， 使高密度聚乙烯、 超髙分子量聚乙 烯、 三元乙丙橡胶、 聚四氟乙烯、 硬脂酸钙、 聚乙烯蜡和颜料混合均匀， 得到 整体混合料； 然后将整体混合料加入到双螺杆挤出机中进行共混挤出， 再进行 造粒， 得到颗粒状的改性聚乙烯材料 （可将整体混合料自双螺杆挤出机的进料 口加入到双螺杆挤出机中， 在料筒中进行共混后， 自挤出口模挤出料条； 料条 经过水冷后， 再经过切粒机切粒， 得到颗粒状的改性聚乙烯材料)；
上述双螺杆挤出机的两个螺杆是同向转动的， 螺杆的转速为 200rPm (转 / 分钟）； 上述双螺杆挤出机的料筒自进料口至挤出口模之间的部分依次为第 I 区、第 II区、第 III区和第 W区， 第 I区的温度为 150°C， 第 II区的温度为 170°C， 第 ΙΠ区的温度为 180°C， 第 IV区的温度为 19(TC， 挤出口模的温度为 200° (：。 第 III区的螺杆上具有回流螺块。 双螺杆挤出机料筒内的真空度为 0. 02MPao
( 2) 制造聚乙烯电缆导管： 将步骤 （1 ) 制得的颗粒状改性聚乙烯材料加 入到挤出成型机中； 改性聚乙烯材料自进料口加入到挤出成型机中后， 经挤出 成型机的料筒压缩、 均化后， 自成型口模挤出成型 （成型口模具有环形的出料 口）； 然后经真空定径、 冷却及牵引等操作， 得到聚乙烯电缆导管。 然后可在聚 乙烯电缆导管上喷印标识， 并进行切割和包装。
上述挤出成型机的螺杆自进料口至成型口模之间的部分依次为螺杆输送 段、螺杆压缩段和螺杆均化段， 螺杆输送段的温度为 140Ό , 螺杆压缩段的温度 为 160°C， 螺杆均化段的温度为 175°C , 成型口模的温度为 200 °C ; 螺杆的转速 为 450rpm (转 /分钟）。 挤出成型机料筒内的真空度为 0. 02MPao
实施例 2
本实施例的聚乙烯电缆导管由改性聚乙烯材料制成； 按重量计， 所述改性 聚乙烯材料的组成为高密度聚乙烯 90份、 超高分子量聚乙烯 10份、 三元乙丙 橡胶 4份、 聚四氟乙烯 0. 2份、 硬脂酸钙 0. 2份、 聚乙烯蜡 0. 2份、 颜料 0. 1 份。
上述聚乙烯电缆导管的制造方法包括下述步骤：
( 1 )制备改性聚乙烯材料： 取高密度聚乙烯 90份 （高密度聚乙烯的熔体 流动速度为 1. 5g/10min)、 超高分子量聚乙烯 10份 （超高分子量聚乙烯的平均 分子量为 2. 5X 106— 3X 106)、 三元乙丙橡胶 4份 （三元乙丙橡胶的门尼粘度为 30)、 聚四氟乙烯 0. 2份、 硬脂酸钙 0. 2份、 聚乙烯蜡 0. 2份、颜料 0. 1份； 然 后将聚四氟乙烯、 硬脂酸钙、 聚乙烯蜡和颜料装入塑料袋中进行初步混合（将 聚四氟乙烯、 硬脂酸钙、 聚乙烯蜡和颜料装入塑料袋中并密封袋口后， 手拿塑 料袋摇动 4分钟） ， 得到初步混合料； 然后将初步混合料、 高密度聚乙烯、 超 高分子量聚乙烯和三元乙丙橡胶一起加入到高速混合机中， 利用搅拌器搅拌 15 分钟， 搅拌器的转速为 250rpm (转 /分钟） ， 使髙密度聚乙烯、 超髙分子量聚乙 烯、 三元乙丙橡胶、 聚四氟乙烯、 硬脂酸钙、 聚乙烯蜡和颜料混合均匀， 得到 整体混合料； 然后将整体混合料加入到双螺杆挤出机中进行共混挤出， 再进行 造粒， 得到颗粒状的改性聚乙烯材料 （可将整体混合料自双螺杆挤出机的进料 口加入到双螺杆挤出机中， 在料筒中进行共混后， 自挤出口模挤出料条； 料条 经过水冷后， 再经过切粒机切粒， 得到颗粒状的改性聚乙烯材料)；
上述双螺杆挤出机的两个螺杆是同向转动的， 螺杆的转速为 250rpm (转 / 分钟）； 上述双螺杆挤出机的料筒自进料口至挤出口模之间的部分依次为第 I 区、第 II区、第 III区和第 IV区， 第 I区的温度为 155°C， 第 II区的温度为 175 C， 第 III区的温度为 185°C， 第 IV区的温度为 195°C， 挤出口模的温度为 205°C。 第 III区的螺杆上具有回流螺块。 双螺杆挤出机料筒内的真空度为 0. 03MPa。
(2) 制造聚乙烯电缆导管： 将步骤 （1 ) 制得的颗粒状改性聚乙烯材料加 入到挤出成型机中； 改性聚乙烯材料自进料口加入到挤出成型机中后， 经挤出 成型机的料筒压缩、 均化后， 自成型口模挤出成型 （成型口模具有环形的出料 口）； 然后经真空定径、 冷却及牵引等操作， 得到聚乙烯电缆导管。 然后可在聚 乙烯电缆导管上喷印标识， 并进行切割和包装。
上述挤出成型机的螺杆自进料口至成型口模之间的部分依次为螺杆输送 段、螺杆压缩段和螺杆均化段， 螺杆输送段的温度为 145°C， 螺杆压縮段的温度 为 165Ό , 螺杆均化段的温度为 180'C， 成型口模的温度为 210'C ; 螺杆的转速 为 350rpm (转 /分钟）。 挤出成型机料筒内的真空度为 0. 03MPa。 实施例 3
本实施例的聚乙烯电缆导管由改性聚乙烯材料制成； 按重量计， 所述改性 聚乙烯材料的组成为高密度聚乙烯 95份、 超高分子量聚乙烯 5份、 三元乙丙橡 胶 5份、 聚四氟乙烯 0. 3份、 硬脂酸钙 1份、 聚乙烯蜡 1份、 颜料 0. 05份。
上述聚乙烯电缆导管的制造方法包括下述步骤-
( 1 ) 制备改性聚乙烯材料： 取髙密度聚乙烯 95份（高密度聚乙烯的熔体 流动速度为 0. 8g/10min),超高分子量聚乙烯 5份（超高分子量聚乙烯的平均分 子量为 1. 5X 106—2X 106)、三元乙丙橡胶 5份 (三元乙丙橡胶的门尼粘度为 50)、 聚四氟乙烯 0. 3份、 硬脂酸钙 1份、 聚乙烯蜡 1份、 颜料 0. 05份； 然后将聚四 氟乙烯、 硬脂酸钙、 聚乙烯蜡和颜料装入塑料袋中进行初步混合（将聚四氟乙 烯、硬脂酸钙、聚乙烯蜡和颜料装入塑料袋中并密封袋口后， 手拿塑料袋摇动 5 分钟） ， 得到初步混合料； 然后将初步混合料、 高密度聚乙烯、 超高分子量聚 乙烯和三元乙丙橡胶一起加入到高速混合机中， 利用搅泮器搅拌 14分钟， 搅拌 器的转速为 350rpm (转 /分钟） ， 使高密度聚乙烯、超高分子量聚乙烯、 三元乙 丙橡胶、 聚四氟乙烯、 硬脂酸钙、 聚乙烯蜡和颜料混合均匀， 得到整体混合料; 然后将整体混合料加入到双螺杆挤出机中进行共混挤出， 再进行造粒， 得到颗 粒状的改性聚乙烯材料 （可将整体混合料自双螺杆挤出机的进料口加入到双螺 杆挤出机中， 在料筒中进行共混后， 自挤出口模挤出料条； 料条经过水冷后， 再经过切粒机切粒， 得到颗粒状的改性聚乙烯材料)；
上述双螺杆挤出机的两个螺杆是同向转动的， 螺杆的转速为 300rpm (转 / 分钟）； 上述双螺杆挤出机的料筒自进料口至挤出口模之间的部分依次为第 I 区、第 II区、第 III区和第 IV区， 第 I区的温度为 170°C， 第 II区的温度为 180Ό , 第 III区的温度为 190°C， 第 IV区的温度为 200°C， 挤出口模的温度为 210°C。 第 III区的螺杆上具有回流螺块。 双螺杆挤出机料筒内的真空度为 0. 06MPa。
(2) 制造聚乙烯电缆导管： 将步骤 （1 ) 制得的颗粒状改性聚乙烯材料加 入到挤出成型机中； 改性聚乙烯材料自进料口加入到挤出成型机中后， 经挤出 成型机的料筒压缩、 均化后， 自成型口模挤出成型 （成型口模具有环形的出料 口）； 然后经真空定径、 冷却及牵引等操作， 得到聚乙烯电缆导管。 然后可在聚 乙烯电缆导管上喷印标识， 并进行切割和包装。
上述挤出成型机的螺杆自进料口至成型口模之间的部分依次为螺杆输送 段、螺杆压缩段和螺杆均化段， 螺杆输送段的温度为 150°C， 螺杆压缩段的温度 为 170Ό， 螺杆均化段的温度为 185°C , 成型口模的温度为 220'C ; 螺杆的转速 为 400rpm (转 /分钟）。 挤出成型机料筒内的真空度为 0. 06MPa。 实施例 4
本实施例的聚乙烯电缆导管由改性聚乙烯材料制成； 按重量计， 所述改性 聚乙烯材料的组成为高密度聚乙烯 88份、 超高分子量聚乙烯 12份、 三元乙丙 橡胶 1份、聚四氟乙烯 1份、硬脂酸钙 0. 5份、聚乙烯蜡 0. 5份、颜料 0. 03份。 上述聚乙烯电缆导管的制造方法包括下述步骤：
( 1 )制备改性聚乙烯材料： 取高密度聚乙烯 88份（高密度聚乙烯的熔体 流动速度为 lg/10min)、 超高分子量聚乙烯 12份 （超髙分子量聚乙烯的平均分 子量为 L 8X 106— 2. 2X 106)、 三元乙丙橡胶 1份 （三元乙丙橡胶的门尼粘度为 40)、 聚四氟乙烯 1份、 硬脂酸钙 0. 5份、 聚乙烯蜡 0. 5份、 颜料 0. 03份； 然 后将聚四氟乙烯、 硬脂酸钙、 聚乙烯蜡和颜料装入塑料袋中进行初步混合 （将 聚四氟乙烯、 硬脂酸钙、 聚乙烯蜡和颜料装入塑料袋中并密封袋口后， 手拿塑 料袋摇动 5分钟） ， 得到初步混合料； 然后将初步混合料、 高密度聚乙烯、 超 高分子量聚乙烯和三元乙丙橡胶一起加入到高速混合机中， 利用搅拌器搅拌 15 分钟， 搅拌器的转速为 300rpm (转 /分钟） ， 使高密度聚乙烯、 超高分子量聚乙 烯、 三元乙丙橡胶、 聚四氟乙烯、 硬脂酸钙、 聚乙烯蜡和颜料混合均匀， 得到 整体混合料； 然后将整体混合料加入到双螺杆挤出机中进行共混挤出， 再进行 造粒， 得到颗粒状的改性聚乙烯材料 （可将整体混合料自双螺杆挤出机的进料 口加入到双螺杆挤出机中， 在料筒中进行共混后， 自挤出口模挤出料条； 料条 经过水冷后， 再经过切粒机切粒， 得到颗粒状的改性聚乙烯材料)；
上述双螺杆挤出机的两个螺杆是同向转动的， 螺杆的转速为 300rPm (转 / 分钟）； 上述双螺杆挤出机的料筒自进料口至挤出口模之间的部分依次为第 I 区、第 II区、第 III区和第 IV区， 第 I区的温度为 170°C， 第 II区的温度为 180°C， 第 III区的温度为 190Ό， 第 IV区的温度为 210°C， 挤出口模的温度为 210°C。 第 III区的螺杆上具有回流螺块。 双螺杆挤出机料筒内的真空度为 0. 05MPa。
(2) 制造聚乙烯电缆导管： 将步骤 （1 ) 制得的颗粒状改性聚乙烯材料加 入到挤出成型机中； 改性聚乙烯材料自进料口加入到挤出成型机中后， 经挤出 成型机的料筒压缩、 均化后， 自成型口模挤出成型 （成型口模具有环形的出料 口）； 然后经真空定径、 冷却及牵引等操作， 得到聚乙烯电缆导管。 然后可在聚 乙烯电缆导管上喷印标识， 并进行切割和包装。
上述挤出成型机的螺杆自进料口至成型口模之间的部分依次为螺杆输送 段、螺杆压缩段和螺杆均化段， 螺杆输送段的温度为 160°C， 螺杆压缩段的温度 为 170°C， 螺杆均化段的温度为 190'C , 成型口模的温度为 240°C ; 螺杆的转速 为 450rpm (转 /分钟）。 挤出成型机料筒内的真空度为 0. 05MPa。

Claims

1、 一种聚乙烯电缆导管， 其特征在于由改性聚乙烯材料制成； 按重量计， 所述改性聚乙烯材料的组成为基料 100份、 三元乙丙橡胶 1一 5份、 聚四氟乙烯 0. 1— 1份、 硬脂酸钙 0. 1— 1份、 聚乙烯蜡 0. 1— 1份、 颜料 0. 01— 0. 1份， 其 中基料由 85— 95% (重量）的高密度聚乙烯和 5— 15% (重量）的超高分子量聚乙 烯组成。
2、 根据权利要求 1所述的聚乙烯电缆导管， 其特征是： 所述高密度聚乙烯 的熔体流动速度为 0. 2-1. 5克 /10分钟。
3、 根据权利要求 1所述的聚乙烯电缆导管， 其特征是： 所述超高分子量聚 乙烯的平均分子量为 1 X 106—3 X 106。
4、 根据权利要求 1所述的聚乙烯电缆导管， 其特征是： 所述三元乙丙橡胶 的门尼粘度为 30-60。
PCT/CN2012/001517 2012-04-01 2012-11-12 聚乙烯电缆导管 WO2013149369A1 (zh)

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