WO2013149368A1 - 改性聚丙烯电缆导管 - Google Patents

改性聚丙烯电缆导管 Download PDF

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Publication number
WO2013149368A1
WO2013149368A1 PCT/CN2012/001516 CN2012001516W WO2013149368A1 WO 2013149368 A1 WO2013149368 A1 WO 2013149368A1 CN 2012001516 W CN2012001516 W CN 2012001516W WO 2013149368 A1 WO2013149368 A1 WO 2013149368A1
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WO
WIPO (PCT)
Prior art keywords
modified polypropylene
temperature
parts
screw
cable conduit
Prior art date
Application number
PCT/CN2012/001516
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English (en)
French (fr)
Inventor
吴锡炎
Original Assignee
Wu Xiyan
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Publication of WO2013149368A1 publication Critical patent/WO2013149368A1/zh

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • 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
    • 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
    • C08K5/005—Stabilisers against oxidation, heat, light, ozone
    • 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

Definitions

  • the present invention relates to a conduit for laying a cable, and more particularly to a modified polypropylene cable conduit.
  • Polypropylene pipe is a kind of green building material, which has the advantages of hygienic, non-toxic, light weight, corrosion resistance, non-fouling, heat preservation and long service life; especially after the emergence of homogenous hot-melt connection technology, installation of piping system
  • the connection method has made a major breakthrough, completely eliminating the leakage of pipelines, and building a safe and reliable integrated pipeline.
  • the polypropylene tube has poor compression resistance and low temperature impact resistance, which limits its application and is not suitable for use as a cable conduit when laying cables underground.
  • the technical problem to be solved by the present invention is to provide a modified polypropylene cable conduit which has better compression resistance, relatively high heat distortion temperature, and better low temperature impact resistance.
  • the technical solutions adopted are as follows:
  • composition of the modified polypropylene material is 100 parts, polytetrafluoroethylene 0.1 to 1 part by weight. , 1 - 1 part, antioxidant 0. 2 - 1 part, pigment 0. 01 - 0. 1 part, wherein the base material is 85-95% by weight of polypropylene and 5-15 % (by weight) of EPDM rubber.
  • the modified polypropylene cable conduit of the present invention can be produced by extrusion molding using the above modified polypropylene material.
  • the polypropylene has a melt flow rate (MFR) of from 0.2 to 1.0 g/10 min (g/10 min).
  • MFR melt flow rate
  • EPDM is a thermoplastic elastomer. Adding EPDM rubber to polypropylene improves the impact resistance and compressive properties of the material while improving the low temperature brittleness of the material.
  • the above ethylene propylene diene rubber has a Mooney viscosity of 30-60.
  • the above polytetrafluoroethylene (PTFE) can improve the wear resistance of the material.
  • the above calcium stearate is an internal lubricant which can reduce the internal friction between the material melts and improve the processing properties of the material. Adding ethylene propylene diene monomer (EPDM) and polytetrafluoroethylene (PTFE) will increase the melt viscosity of the material melt and make it difficult to process. Therefore, an appropriate amount of calcium stearate is added to improve the lubrication of the material during processing. Sex.
  • the role of the above antioxidants is to prevent aging of the polypropylene.
  • the above-mentioned 0.1- 1 part of the antioxidant is from 0.1 to 0.5 parts of the antioxidant 1010 (i.e., tetrakis[ ⁇ -(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol.
  • the ester is composed of 0.1 to 0.5 parts of antioxidant 168 (i.e., tris[2,4-di-tert-butylphenyl]phosphite).
  • the above antioxidant 1010 acts as a primary antioxidant and mainly functions as a radical reaction terminator; the antioxidant 168 acts as a secondary antioxidant, mainly functions as a peroxide decomposing agent; and at the same time, the antioxidant 1010 and the anti-oxidant Oxygen agent 168 has a good synergistic effect.
  • the above pigments also commonly referred to as toners are selected according to the customer's requirements for the color of the cable conduit.
  • the method of manufacturing the modified polypropylene cable conduit of the present invention comprises the following steps -
  • the whole mixture is added to the twin-screw extruder from the feed port of the twin-screw extruder, In the barrel After blending line, since the extrusion die extruded strands; strand after cooled, and then pelletized through a pelletizer to obtain a particulate material modified polypropylene);
  • the two screws of the above twin-screw extruder rotate in the same direction.
  • the rotation speed of the screw is 200-300 rpm (rev/min), and the material is forwardly conveyed when conveying the material; the twin-screw extruder can make the material in the molten state well. Shearing and mixing to make the material plasticized better and more uniform.
  • the barrel of the above twin-screw extruder The portion from the feed port to the extrusion die is the first zone, the third zone, the second zone and the fourth zone, the temperature of the first zone is 160-180 ° C, and the temperature of the zone II is 180- At 190 ° C, the temperature in the second zone is 190-210 V, the temperature in the W zone is 190-210 ° C, and the temperature of the extrusion die is 200-210 ° C.
  • the screw in the second zone has a return screw to make the melt plasticized better and more uniform.
  • the vacuum degree in the cylinder 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 obtained modified polypropylene material has no bubbles. Better performance.
  • modified polypropylene cable conduit The particulate modified polypropylene material obtained in the step (1) was placed in an extrusion molding machine, and a modified polypropylene cable conduit was produced by extrusion molding.
  • the self-forming die is extruded (the molding die has a ring-shaped discharge port) Then, a modified polypropylene cable conduit is obtained by vacuum sizing, cooling and pulling. The logo can then be printed on the modified polypropylene cable conduit 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 160-180 ⁇ , and the temperature of the screw compression section is At 180-190 ° C, the temperature of the screw homogenization section is 190-210 ° C, and the temperature of the forming die is 200-210 V.
  • the screw has a rotational speed of 300-450 rpm (revolutions per minute). 0 ⁇ 06. 06MPa ⁇ The vacuum is 0. 02-0. 06MPa.
  • the modified polypropylene cable conduit of the present invention has the following excellent properties: (1) excellent electrical insulation; (2) good impact resistance, the notched impact strength measured at an ambient temperature of 23 ⁇ is 16.1 KJ/m 2 ; (3) high heat distortion temperature, better low temperature impact resistance, can be - long-term use at 10 ° C- 70 ° C ambient temperature; and (4) better tensile properties and compression properties; (5 ) Light weight, smooth surface, low frictional resistance when wearing cable, and can be welded by heat welding.
  • the modified polypropylene cable conduit of the invention is suitable for laying pipelines and cables underground by using non-excavation technology, and can complete the construction of pipelines and cables laid in special sections such as roads, railways, buildings, riverbeds, farmland protection areas, etc. Used in telecommunications, electric power and other projects.
  • the modified polypropylene cable conduit of the present embodiment is made of a modified polypropylene material; the composition of the modified polypropylene material is 85 parts of polypropylene, 15 parts of ethylene propylene diene monomer, and polytetrafluoroethylene by weight. 0 ⁇ Antioxidant 0.02 0. 1 part, antioxidant 0. 2 parts (including antioxidant 1010 0. 1 part, antioxidant 168 0. 1 ⁇ Pigment 0. 01 parts.
  • the method for manufacturing the above modified polypropylene cable conduit comprises the following steps:
  • modified polypropylene material 85 parts by weight of polypropylene (melt flow rate of polypropylene is 1 g/10 min), 15 parts of EPDM rubber (door of EPDM rubber) 0 ⁇ The viscosity of 40%, polytetrafluoroethylene 0. 1 part, calcium stearate 0.1 part, antioxidant 0.2 parts (including antioxidant 1010 0. 1 part, antioxidant 168 0. 1 ), pigment 0.
  • the two screws of the twin-screw extruder described above rotate in the same direction, and the screw rotates at 200 rpm (rev/min).
  • 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 165 ° C, the first The temperature in Zone II was 180 °C, the temperature in Zone III was 190 °C, the temperature in Zone IV was 190 °C, and the temperature of the extrusion die was 200 °C.
  • the screw of the third zone has a return screw. 02MPa ⁇
  • the vacuum in the cylinder of the twin-screw extruder is 0. 02MPa.
  • modified polypropylene cable conduit The granular modified polypropylene material obtained in step (1) is fed into the extrusion molding machine from the feed port, and compressed and homogenized by the barrel of the extrusion molding machine. After that, the self-forming die is extruded (the forming die has an annular discharge port); then the vacuum sizing, cooling and pulling operations are performed to obtain a modified polypropylene cable conduit. The logo can then be printed on the modified polypropylene cable conduit and cut and packaged.
  • the part of the extrusion molding machine from the feed inlet to the forming die is screw conveying section, screw compression section and screw homogenizing section.
  • the temperature of the screw conveying section is 160'C, and the temperature of the screw compression section is 180. °C, the temperature of the screw homogenization section is 190 ⁇ , the temperature of the forming die is 200 ° C; the rotation speed of the screw is 300 rpm (rev / min). 02MPa ⁇
  • the degree of vacuum in the cylinder of the extruder is 0. 02MPa.
  • the modified polypropylene cable conduit of the present embodiment is made of a modified polypropylene material; the composition of the modified polypropylene material is 95 parts by weight, 5 parts of ethylene propylene diene monomer, and polytetrafluoroethylene by weight. 0 ⁇ 0. 2 parts, calcium stearate 0. 2 parts, antioxidants 0.3 parts (including antioxidants 1010 0. 15 parts, antioxidants 168 0. 15 parts), pigments 0. 05 parts.
  • the method for manufacturing the above modified polypropylene cable conduit comprises the following steps:
  • modified polypropylene material 95 parts by weight of polypropylene (melt flow rate of polypropylene is 0.8 g/10 min), ethylene dipropylene monomer 5 parts (ethylene propylene diene monomer) 2 ⁇ The Mooney viscosity is 30), polytetrafluoroethylene 0.2 parts, calcium stearate 0.2 parts, antioxidants 0.3 parts (including antioxidants 1010 0. 15 parts, antioxidants 168 0. 15 parts), pigment 0.
  • the whole mixture is added to the twin-screw extruder for blending and extrusion
  • the granulation is further carried out to obtain a granulated modified polypropylene material (the whole mixture can be added from the feed port of the twin-screw extruder to the twin-screw extruder, and after being blended in the cylinder, the self-extruding port Mold extrusion strip; after the material is cooled by water, it is pelletized by a pelletizer to obtain a granular modified polypropylene material);
  • the two screws of the twin-screw extruder described above rotate in the same direction, and the rotation speed of the screw is 300 r P m (rev/min).
  • 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 second zone and the fourth zone, and the temperature of the first zone is 170 ° C, the first The temperature in zone II is 185 ° C, the temperature in the third zone is 195 ⁇ , the temperature in zone IV is 195 ° C, and the temperature of the extrusion die is 205 ° C.
  • the screw on the third zone has a return screw. 0. 03MPa ⁇
  • the vacuum of the cylinder is 0. 03MPa.
  • step (2) Manufacture of modified polypropylene cable conduit:
  • the granular modified polypropylene material obtained in step (1) is fed into the extrusion molding machine from the feed port, and compressed and homogenized by the barrel of the extrusion molding machine.
  • the self-forming die is extruded (the forming die has an annular discharge port); then the vacuum sizing, cooling and pulling operations are performed to obtain a modified polypropylene cable conduit.
  • the logo can then be printed on the modified polypropylene cable conduit and cut and packaged.
  • the part of the extrusion molding machine from the feed port to the forming die is screw conveying section, screw compression section and screw homogenizing section.
  • the temperature of the screw conveying section is 165 ° C
  • the temperature of the screw compression section is 185.
  • the modified polypropylene cable conduit of the present embodiment is made of a modified polypropylene material; the composition of the modified polypropylene material is 90 parts of polypropylene, 10 parts of ethylene propylene diene monomer, and polytetrafluoroethylene by weight. 0 ⁇ 0. 2 parts, calcium stearate 0.3 parts, antioxidants 0.5 parts (including antioxidants 1010 0. 2 parts, antioxidants 168 0. 3 parts), pigments 0. 02 parts.
  • the method for manufacturing the above modified polypropylene cable conduit comprises the following steps:
  • modified polypropylene material 90 parts by weight of polypropylene (melt flow rate of polypropylene is 0.5 g/10 min), EPDM 10 parts (ethylene propylene diene monomer) 5 ⁇ (The antioxidant Moonton viscosity is 50), polytetrafluoroethylene 0.3 parts, calcium stearate 0.3 parts, antioxidants 0.5 parts (including antioxidants 1010 0. 2 parts, antioxidants 168 0.
  • the whole mixture then the whole mixture is added to a twin-screw extruder for blending and extrusion, and then granulation is performed.
  • a granular modified polypropylene material is obtained (the whole mixture can be added from the feed port of the twin-screw extruder to the twin-screw extruder, and after being blended in the barrel, the strip is extruded from the extrusion die After the material is cooled by water, it is granulated by a pelletizer to obtain a granular modified polypropylene material);
  • the two screws of the twin-screw extruder described above rotate in the same direction, and the screw rotates at 250 rpm (rev/min).
  • 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 175'C, the first The temperature in zone II is 190 ° C, the temperature in zone III is 200 ° C, the temperature in zone IV is 200 ° C, and the temperature of the extrusion die is 21 CTC:.
  • the screw of the third zone has a return screw.
  • the pressure in the cylinder of the twin-screw extruder was 0.04 MPa.
  • modified polypropylene cable conduit Granular modified polypropylene material obtained in step (1) The material is added to the extrusion molding machine from the feed port, and after being compressed and homogenized by the barrel of the extrusion molding machine, the self-forming die is extruded (the molding die has a ring-shaped discharge port); A modified polypropylene cable conduit is obtained by operation such as diameter, cooling and traction. The logo can then be printed on the modified polypropylene cable conduit and cut and packaged.
  • the part of the extrusion molding machine from the feed port to the forming die is screw conveying section, screw compression section and screw homogenizing section.
  • the temperature of the screw conveying section is 170 ° C, and the temperature of the screw compression section is 190. 'C, the temperature of the screw homogenization section is 200 ⁇ , the temperature of the forming die is 210 ⁇ ; the rotation speed of the screw is 400 rpm (rev/min). 05MPa ⁇
  • the degree of vacuum in the barrel of the extruder is 0. 04MPa.
  • the modified polypropylene cable conduit of the present embodiment is made of a modified polypropylene material; the composition of the modified polypropylene material is 85 parts of polypropylene, 15 parts of ethylene propylene diene monomer, and polytetrafluoroethylene by weight. 1 ⁇ 1 part, 1 part of calcium stearate, 1 part of antioxidant (including 1010. 5 parts of antioxidant, antioxidant 168 0. 5 parts), pigment 0.1 part.
  • the method for manufacturing the above modified polypropylene cable conduit comprises the following steps:
  • modified polypropylene material 85 parts by weight of polypropylene (melt flow rate of polypropylene is 0.6 g/10 minutes), ethylene propylene diene monomer 15 parts (ethylene propylene diene monomer) The Mooney viscosity is 60), 1 part of polytetrafluoroethylene, 1 part of calcium stearate, 1 part of antioxidant (including 1010 0.5 parts of antioxidant, 168 0.
  • antioxidant 5 parts of antioxidant, pigment 0 1 part; then put polytetrafluoroethylene, calcium stearate, antioxidants and pigments into a plastic bag for preliminary mixing (filling polytetrafluoroethylene, calcium stearate, antioxidants and pigments into plastic bags) After sealing the bag mouth, shake the bag with a plastic bag for 5 minutes) to obtain the preliminary mixture; then add the preliminary mixture, polypropylene and EPDM rubber to the high-speed mixer, and stir for 11 minutes with a stirrer.
  • the speed of the stirrer is 400 rpm (revolutions per minute), and the polypropylene, ethylene propylene diene monomer, polytetrafluoroethylene, calcium stearate, antioxidants and pigments are uniformly mixed to obtain a whole mixture; then the whole mixture is mixed.
  • the material is added to a twin-screw extruder for blending and extrusion, and then Granulation to obtain granulated modified polypropylene 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 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 polypropylene material);
  • the two screws of the twin-screw extruder described above rotate in the same direction, and the screw rotates at 280 rpm (rev/min).
  • the portion of the above-mentioned twin-screw extruder from the feed inlet to the extrusion die is in turn Zone, Zone II, Zone III and Zone IV, the temperature in Zone I is 180 °C, the temperature in Zone II is 190 °C, the temperature in Zone III is 210 °C, and the temperature in Zone IV is At 210 ° C, the temperature of the extrusion die was 210 t:.
  • the screw on the third zone has a return screw. 05MPa o
  • the vacuum in the cylinder of the twin-screw extruder is 0. 06MPa o
  • modified polypropylene cable conduit The granular modified polypropylene material obtained in step (1) is fed into the extrusion molding machine from the feed port, and compressed and homogenized by the barrel of the extrusion molding machine. After that, the self-forming die is extruded (the forming die has an annular discharge port); then the vacuum sizing, cooling and pulling operations are performed to obtain a modified polypropylene cable conduit. The logo can then be printed on the modified polypropylene cable conduit and cut and packaged.
  • the part of the extrusion molding machine from the feed port to the forming die is screw conveying section, screw compression section and screw homogenizing section.
  • the temperature of the screw conveying section is 180 ° C, and the temperature of the screw compression section is 190.
  • the temperature of the screw homogenization section was 210 ° C
  • the temperature of the forming die was 210 ⁇
  • the rotation speed of the screw was 400 rpm (rev / min).
  • 05MPa ⁇ The vacuum in the barrel of the extruder is 0. 06MPa.

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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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Abstract

一种改性聚丙烯电缆导管，其特征在于由改性聚丙烯材料制成；按重量计，所述改性聚丙烯材料的组成为基料100份、聚四氟乙烯0.1-1份、硬脂酸钙0.1-1份、抗氧剂0.2-1份、颜料0.01-0.1份，其中基料由85-95%（重量）的聚丙烯和5-15%（重量）的三元乙丙橡胶组成。本发明的改性聚丙烯电缆导管具有下述优异性能；（1）优良的电气绝缘性；（2）抗冲击性能好，环境温度23℃下测得的缺口冲击强度达16.1KJ/m²；（3）热变形温度比较高，低温抗冲击性能较佳，可在-10℃-70℃的环境温度下长期使用；（4）较佳的抗拉性能和抗压性能；（5）质轻，表面光滑，穿电缆时摩擦阻力小，且可热熔焊对接。

Description

改性聚丙烯电缆导管
技术领域
本发明涉及敷设电缆所用的导线管， 具体地说， 涉及一种改性聚丙烯电缆 导管。
背景技术
聚丙烯管材是一种绿色建材， 具有卫生、 无毒、 质量轻、 耐腐蚀、 不结垢、 保温节能及使用寿命长等优点； 特别是在出现同质热熔连接技术后， 管道系统 的安装、 连接方式取得重大突破， 彻底杜绝了管道发生泄漏现象， 可构建安全 可靠的一体化管道。 但是聚丙烯管材抗压性及低温抗冲击性能较差， 这就限制 了其应用， 不适合在地下敷设电缆时用作电缆导管。
发明内容
本发明所要解决的技术问题是提供一种改性聚丙烯电缆导管， 这种改性聚 丙烯电缆导管具有较佳的抗压性能、 比较高的热变形温度、 以及较佳的低温抗 冲击性能。 采用的技术方案如下：
一种改性聚丙烯电缆导管， 其特征在于由改性聚丙烯材料制成； 按重量计， 所述改性聚丙烯材料的组成为基料 100份、聚四氟乙烯 0. 1— 1份、硬脂酸钙 0. 1 一 1份、 抗氧剂 0. 2— 1份、 颜料 0. 01— 0. 1份， 其中基料由 85—95% (重量）的 聚丙烯和 5—15% (重量）的三元乙丙橡胶组成。
本发明的改性聚丙烯电缆导管可采用上述改性聚丙烯材料经挤出成型制 成。
优选上述聚丙烯的熔体流动速度 （MFR)为 0. 2- 1. 0克 /10分钟（g/10min)。 三元乙丙橡胶 （EPDM) 是一种热塑性弹性体， 在聚丙烯中添加三元乙丙橡 胶， 可以改善材料的抗冲击性能、 抗压性能， 同时改善了材料的低温脆性。 优 选上述三元乙丙橡胶的门尼粘度为 30-60。
上述聚四氟乙烯 (PTFE)可提高材料的耐磨性。 上述硬脂酸钙是一种内润滑剂， 可以降低材料熔体之间的内摩擦， 提高材 料的加工性能。 加入三元乙丙橡胶（EPDM) 和聚四氟乙烯 (PTFE)后， 会使材料 熔体的熔融粘度增加， 较难加工， 因此加入适量的硬脂酸钙， 以提高材料在加 工时的润滑性。
上述抗氧剂的作用是阻止聚丙烯老化。 优选上述 0. 2- 1份抗氧剂由 0. 1— 0. 5份抗氧剂 1010 (即四 [β- ( 3,5-二叔丁基 -4-羟基苯基） 丙酸]季戊四醇酯） 和 0. 1— 0. 5份抗氧剂 168 (即三 [2，4-二叔丁基苯基] 亚磷酸酯）组成。 由于 聚丙烯分子主链上存在叔碳原子， 其在热、 氧、 紫外线等外界因素的共同作用 下极易发生化学变化， 生成过氧化物， 之后断裂形成自由基， 进而引起大分子 链裂解、 支化、 交联， 使聚丙烯失去髙分子材料特征， 丧失使用性能， 因此防 止聚丙烯老化， 主要是防止热氧老化和自由基老化。 上述抗氧剂 1010作为主抗 氧剂， 主要起到自由基反应终止剂的作用； 抗氧剂 168作为辅抗氧剂， 主要起 到过氧化物分解剂的作用；同时抗氧剂 1010和抗氧剂 168又有良好的协同效应。 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。
优选本发明的改性聚丙烯电缆导管的制造方法包括下述步骤-
( 1 )制备改性聚丙烯材料： 按上述比例配备聚丙烯、 三元乙丙橡胶、 聚四 氟乙烯、 硬脂酸钙、 抗氧剂和颜料； 然后将聚四氟乙烯、 硬脂酸钙、 抗氧剂和 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、 抗氧剂和颜 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、 聚丙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） ， 使聚丙烯、三 元乙丙橡胶、 聚四氟乙烯、 硬脂酸钙、 抗氧剂和颜料混合均匀， 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 到颗粒状的改性聚丙烯材料 （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丙烯材料)；
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 ΙΠ区和第 IV区， 第 I区的温度为 160- 180°C，第 II区的温度为 180- 190°C ,第 ΠΙ区的温度为 190-210 V， 第 W区的温度为 190- 210°C， 挤出口模的温度为 200- 210°C。 优选第 ΙΠ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 使制得的改性聚丙烯材料中无气泡， 性能更佳。
(2) 制造改性聚丙烯电缆导管： 将步骤 （1 ) 制得的颗粒状改性聚丙烯材 料加入到挤出成型机中， 用挤出成型的方法制造改性聚丙烯电缆导管。
改性聚丙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， 得到改性聚丙烯电缆导管。 然后可在改性聚丙烯电 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 160- 180Ό , 螺杆压缩段的 温度为 180- 190°C，螺杆均化段的温度为 190- 210'C，成型口模的温度为 200-210 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。
本发明的改性聚丙烯电缆导管具有下述优异性能： （1)优良的电气绝缘性； (2)抗冲击性能好 ， 环境温度 23Ό下测得的缺口冲击强度达 16. 1 KJ/m2 ; (3) 热变形温度比较高， 低温抗冲击性能较佳， 可在- 10°C— 70°C的环境温度下长期 使用； （4)较佳的抗拉性能和抗压性能； （5) 质轻， 表面光滑， 穿电缆时摩擦阻 力小， 且可热熔焊对接。 本发明的改性聚丙烯电缆导管适合于应用非开挖技术 在地下敷设管道及电缆， 能够完成在道路、 铁路、 建筑物、 河床下、 农田保护 区等特殊地段敷设管道及电缆的施工， 广泛应用于电信、 电力等工程。
具体实施方式 实施例 1
本实施例的改性聚丙烯电缆导管由改性聚丙烯材料制成； 按重量计， 所述 改性聚丙烯材料的组成为聚丙烯 85份、 三元乙丙橡胶 15份、 聚四氟乙烯 0. 1 份、硬脂酸钙 0. 1份、抗氧剂 0. 2份 (其中抗氧剂 1010 0. 1份，抗氧剂 168 0. 1 份)、 颜料 0. 01份。
上述改性聚丙烯电缆导管的制造方法包括下述步骤：
( 1 ) 制备改性聚丙烯材料： 按重量计， 取聚丙烯 85份 （聚丙烯的熔体流 动速度为 1克 /10分钟）、三元乙丙橡胶 15份（三元乙丙橡胶的门尼粘度为 40)、 聚四氟乙烯 0. 1份、 硬脂酸钙 0. 1份、 抗氧剂 0. 2份 （其中抗氧剂 1010 0. 1 份， 抗氧剂 168 0. 1份）、 颜料 0. 01份； 然后将聚四氟乙烯、 硬脂酸钙、 抗氧 剂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、 抗氧剂和颜 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、 聚丙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 400rpni (转 /分钟） ， 使聚丙烯、 三元乙丙 橡胶、 聚四氟乙烯、 硬脂酸钙、 抗氧剂和颜料混合均匀， 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 状的改性聚丙烯材料 （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丙烯材料）；
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 IV区， 第 I区的温度为 165°C， 第 II区的温度为 180°C， 第 III区的温度为 190°C， 第 IV区的温度为 190°C， 挤出口模的温度为 200°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. 02MPa。
( 2) 制造改性聚丙烯电缆导管： 将步骤 （1 ) 制得的颗粒状改性聚丙烯材 料自进料口加入到挤出成型机中， 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， 得到改性聚丙烯电缆导管。 然后可在改性聚丙烯电缆导管上喷印标识， 并进行切割和包装。
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 180 °C，螺杆均化段的温度为 190Ό，成型口模的温度为 200°C ;螺杆的转速为 300rpm (转 /分钟）。 挤出成型机料筒内的真空度为 0. 02MPa。 实施例 2
本实施例的改性聚丙烯电缆导管由改性聚丙烯材料制成； 按重量计， 所述 改性聚丙烯材料的组成为聚丙烯 95份、三元乙丙橡胶 5份、聚四氟乙烯 0. 2份、 硬脂酸钙 0. 2份、抗氧剂 0. 3份（其中抗氧剂 1010 0. 15份，抗氧剂 168 0. 15 份）、 颜料 0. 05份。
上述改性聚丙烯电缆导管的制造方法包括下述步骤：
( 1 )制备改性聚丙烯材料： 按重量计， 取聚丙烯 95份 （聚丙烯的熔体流 动速度为 0. 8克 /10分钟）、三元乙丙橡胶 5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、 抗氧剂 0. 3份（其中抗氧剂 1010 0. 15 份， 抗氧剂 168 0. 15份）、 颜料 0. 05份； 然后将聚四氟乙烯、 硬脂酸钙、 抗 氧剂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、 抗氧剂和 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、 聚丙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 12分钟， 搅拌器的转速为 350rpm (转 /分钟） ， 使聚丙烯、 三元乙丙 橡胶、 聚四氟乙烯、 硬脂酸钙、 抗氧剂和颜料混合均匀， 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 状的改性聚丙烯材料（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丙烯材料）；
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 ΠΙ区和第 IV区， 第 I区的温度为 170°C， 第 II区的温度为 185°C , 第 ΙΠ区的温度为 195Ό , 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) 制造改性聚丙烯电缆导管： 将步骤 （1 ) 制得的颗粒状改性聚丙烯材 料自进料口加入到挤出成型机中， 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， 得到改性聚丙烯电缆导管。 然后可在改性聚丙烯电缆导管上喷印标识， 并进行切割和包装。 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 165°C， 螺杆压缩段的温度为 185 V，螺杆均化段的温度为 195°C，成型口模的温度为 205°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. 03MPa。 实施例 3
本实施例的改性聚丙烯电缆导管由改性聚丙烯材料制成； 按重量计， 所述 改性聚丙烯材料的组成为聚丙烯 90份、 三元乙丙橡胶 10份、 聚四氟乙烯 0. 3 份、硬脂酸钙 0. 3份、抗氧剂 0. 5份（其中抗氧剂 1010 0. 2份，抗氧剂 168 0. 3 份）、 颜料 0. 02份。
上述改性聚丙烯电缆导管的制造方法包括下述步骤：
( 1 ) 制备改性聚丙烯材料： 按重量计， 取聚丙烯 90份 （聚丙烯的熔体流 动速度为 0. 5克 /10分钟）、 三元乙丙橡胶 10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 0. 3份、抗氧剂 0. 5份 (其中抗氧剂 1010 0. 2 份， 抗氧剂 168 0. 3份）、 颜料 0. 02份； 然后将聚四氟乙烯、 硬脂酸钙、 抗氧 剂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、 抗氧剂和颜 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、 聚丙烯和三元乙丙橡胶一起加入到髙速混合机中， 利用搅 拌器搅拌 15分钟， 搅拌器的转速为 250rPm (转 /分钟） ， 使聚丙烯、 三元乙丙 橡胶、 聚四氟乙烯、 硬脂酸钙、 抗氧剂和颜料混合均匀， 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 状的改性聚丙烯材料 （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丙烯材料）；
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 175'C， 第 II区的温度为 190°C， 第 III区的温度为 200°C， 第 IV区的温度为 200 °C， 挤出口模的温度为 21CTC：。 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. 04MPa。
(2) 制造改性聚丙烯电缆导管： 将步骤 （1 ) 制得的颗粒状改性聚丙烯材 料自进料口加入到挤出成型机中， 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， 得到改性聚丙烯电缆导管。 然后可在改性聚丙烯电缆导管上喷印标识， 并进行切割和包装。
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 170°C， 螺杆压缩段的温度为 190 'C，螺杆均化段的温度为 200Ό，成型口模的温度为 210Ό ;螺杆的转速为 400rpm (转 /分钟）。 挤出成型机料筒内的真空度为 0. 04MPa。 实施例 4
本实施例的改性聚丙烯电缆导管由改性聚丙烯材料制成； 按重量计， 所述 改性聚丙烯材料的组成为聚丙烯 85份、 三元乙丙橡胶 15份、 聚四氟乙烯 1份、 硬脂酸钙 1份、 抗氧剂 1份（其中抗氧剂 1010 0. 5份， 抗氧剂 168 0. 5份）、 颜料 0. 1份。
上述改性聚丙烯电缆导管的制造方法包括下述步骤：
( 1 ) 制备改性聚丙烯材料： 按重量计， 取聚丙烯 85份 （聚丙烯的熔体流 动速度为 0. 6克 /10分钟）、 三元乙丙橡胶 15份 （三元乙丙橡胶的门尼粘度为 60)、聚四氟乙烯 1份、硬脂酸钙 1份、抗氧剂 1份（其中抗氧剂 1010 0. 5份， 抗氧剂 168 0. 5份)、 颜料 0. 1份； 然后将聚四氟乙烯、 硬脂酸钙、 抗氧剂和 颜料装入塑料袋中进行初步混合（将聚四氟乙烯、 硬脂酸钙、 抗氧剂和颜料装 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、 聚丙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 11分钟， 搅泮器的转速为 400rpm (转 /分钟） ， 使聚丙烯、 三元乙丙橡胶、 聚四氟乙烯、 硬脂酸钙、 抗氧剂和颜料混合均匀， 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 性聚丙烯材料 （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丙烯材料)；
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 280rpm (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 180°C， 第 II区的温度为 190°C， 第 III区的温度为 210'C， 第 IV区的温度为 210°C， 挤出口模的温度为 210t：。 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. 06MPao
( 2) 制造改性聚丙烯电缆导管： 将步骤 （1 ) 制得的颗粒状改性聚丙烯材 料自进料口加入到挤出成型机中， 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， 得到改性聚丙烯电缆导管。 然后可在改性聚丙烯电缆导管上喷印标识， 并进行切割和包装。
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 180°C， 螺杆压缩段的温度为 190 'C，螺杆均化段的温度为 210°C，成型口模的温度为 210Ό ;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。

Claims

WO 2013/149368 权 利 要 求 书 PCT/CN2012/001516
1、 一种改性聚丙烯电缆导管， 其特征在于由改性聚丙烯材料制成； 按重量 计， 所述改性聚丙烯材料的组成为基料 100份、 聚四氟乙烯 0. 1— 1份、 硬脂酸 钙 0. 1— 1份、抗氧剂 0. 2-1份、颜料 0. 01-0. 1份， 其中基料由 85—95% (重 量）的聚丙烯和 5— 15% (重量）的三元乙丙橡胶组成。
1、 根据权利要求 1 所述的改性聚丙烯电缆导管， 其特征是： 所述 0. 2—1 份抗氧剂由 0. 1-0. 5份抗氧剂 1010和 0. 1 -0. 5份抗氧剂 168组成。
PCT/CN2012/001516 2012-04-01 2012-11-12 改性聚丙烯电缆导管 WO2013149368A1 (zh)

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