PVC (Polyvinyl Chloride) power cable protective sleeve and preparation method thereof

A technology for power cables and sheath tubes, applied in the field of PVC power cable sheath tubes and its preparation, to achieve the effects of ensuring cross-linking effects, improving mechanical properties, and good toughness

Inactive Publication Date: 2018-03-09

YANCHENG RUITONG PLASTIC CO LTD

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AI-Extracted Technical Summary

Problems solved by technology

[0004] The sheath tube is a commonly used insulating protective sleeve for power cables. Most of the existing sheath tubes are made of polymer materials such as polyethylene, polypropylene, and...

Abstract

The invention provides a PVC power cable sheathing tube and a preparation method thereof. The present invention uses PVC as the main raw material, and through three steps of compound preparation, blending and extrusion, and forming and sizing, a PVC power cable sheath tube is made, which has higher strength and better toughness. And has good flame retardancy.

Application Domain

Plastic/resin/waxes insulators

Technology Topic

EngineeringExtrusion +6

Image

Examples

Experimental program(5)
Comparison scheme(3)
Effect test(1)

Example Embodiment

[0036] Example 1

[0037] A preparation method of PVC power cable sheath, the specific steps are as follows:

[0038] (1) Mix light calcium carbonate, silane coupling agent, coated red phosphorus masterbatch, ammonium polyphosphate and decabromodiphenyl ether uniformly to obtain the first material for use;

[0039] (2) Copolymerize polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer, styrene-butadiene block copolymer, thermoplastic polyester elastomer (TPEE) and polyarylether nitrile-polysiloxane block copolymer Add the material into the high-speed mixer, stir at low speed, add trioctyl trimellitate and di-secondary octyl phthalate, stir at high speed, melt blending at 70°C for 10 minutes, then add the first material obtained in step (1), continue Stir at high speed to 90°C and crosslink for 20 minutes at this temperature;

[0040] (3) Add algin, lubricant and antistatic agent, continue to stir and react at high speed for 10 minutes to obtain a mixture;

[0041] (4) Add the mixture obtained in step (3) to a twin-screw extruder for blending and extrusion, and then granulate to obtain pellets;

[0042] (5) The pellets obtained in step (4) are added to an extruder for molding, sizing, traction, and cutting to obtain a PVC power cable sheath;

[0043] Among them, in step (1), the mass ratio of light calcium carbonate, silane coupling agent, coated red phosphorus masterbatch, ammonium polyphosphate and decabromodiphenyl ether is 1:0.5:0.1:0.2:0.2; Calcium carbonate is nano-active light calcium carbonate with an average particle size of 50nm or less; the particle size of the coated red phosphorus masterbatch is 1200 mesh, and the effective phosphorus content is 90%;

[0044] In step (2), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer, styrene-butadiene block copolymer, thermoplastic polyester elastomer (TPEE), polyarylether nitrile-polysiloxane intercalation The mass ratio of segment copolymer, trioctyl trimellitate, di-secondary octyl phthalate and the first material is 80:15:10:10:7:5:3:7;

[0045] In step (3), the added amounts of algin, lubricant and antistatic agent are 3%, 5%, and 1% of polyvinyl chloride (PVC) respectively; the lubricant is a mixture of polyethylene wax and stearic acid. The mass ratio is 1:1.3; the antistatic agent is carbon black;

[0046] The rotating speed of low-speed stirring is 400rpm, and the rotating speed of high-speed stirring is 900rpm;

[0047] In step (4), the speed of the two screws of the twin-screw extruder is 200 rpm, and the feed port to the extrusion port are divided into four parts, and the temperatures are 150°C, 165°C, 180°C, and 195°C in sequence; twin screw extrusion The vacuum degree in the barrel of the machine is 0.02MPa;

[0048] A PVC power cable sheath, which is obtained by the above preparation method;

Example Embodiment

[0049] Example 2

[0050] A preparation method of PVC power cable sheath, the specific steps are as follows:

[0051] (1) Mix light calcium carbonate, silane coupling agent, coated red phosphorus masterbatch, ammonium polyphosphate and decabromodiphenyl ether uniformly to obtain the first material for use;

[0052] (2) Copolymerize polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer, styrene-butadiene block copolymer, thermoplastic polyester elastomer (TPEE) and polyarylether nitrile-polysiloxane block copolymer Add the material into the high-speed mixer, stir at low speed, add trioctyl trimellitate and di-secondary octyl phthalate, stir at high speed, melt and blend at 75°C for 15 minutes, then add the first material obtained in step (1), continue Stir at high speed to 95°C, cross-link at this temperature for 25 minutes;

[0053] (3) Add algin, lubricant and antistatic agent, continue to stir and react at high speed for 12 minutes to obtain a mixture;

[0054] (4) Add the mixture obtained in step (3) to a twin-screw extruder for blending and extrusion, and then granulate to obtain pellets;

[0055] (5) The pellets obtained in step (4) are added to an extruder for molding, sizing, traction, and cutting to obtain a PVC power cable sheath;

[0056] Among them, in step (1), the mass ratio of light calcium carbonate, silane coupling agent, coated red phosphorus masterbatch, ammonium polyphosphate and decabromodiphenyl ether is 1: 0.6: 0.2: 0.3: 0.3; Calcium carbonate is nano-active light calcium carbonate with an average particle size of 50nm or less; the particle size of the coated red phosphorus masterbatch is 1200 mesh, and the effective phosphorus content is 90%;

[0057] In step (2), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer, styrene-butadiene block copolymer, thermoplastic polyester elastomer (TPEE), polyarylether nitrile-polysiloxane intercalation The mass ratio of the segment copolymer, trioctyl trimellitate, di-secondary octyl phthalate and the first material is 80:20:12:12:9:8:4:10;

[0058] In step (3), the added amounts of algin, lubricant and antistatic agent are 4%, 6%, and 2% of polyvinyl chloride (PVC) respectively; the lubricant is a mixture of polyethylene wax and stearic acid. The mass ratio is 1:1.3; the antistatic agent is carbon black;

[0059] The rotating speed of low-speed stirring is 400rpm, and the rotating speed of high-speed stirring is 900rpm;

[0060] In step (4), the rotation speed of the two screws of the twin-screw extruder is 300 rpm, and the feed port to the extrusion port are divided into four parts, and the temperatures are 160°C, 175°C, 190°C, and 200°C in sequence; twin screw extrusion The vacuum degree in the barrel of the machine is 0.03MPa;

[0061] A PVC power cable sheath, which is obtained by the above preparation method;

Example Embodiment

[0062] Example 3

[0063] A preparation method of PVC power cable sheath, the specific steps are as follows:

[0064] (1) Mix light calcium carbonate, silane coupling agent, coated red phosphorus masterbatch, ammonium polyphosphate and decabromodiphenyl ether uniformly to obtain the first material for use;

[0065] (2) Copolymerize polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer, styrene-butadiene block copolymer, thermoplastic polyester elastomer (TPEE) and polyarylether nitrile-polysiloxane block copolymer Add the material into the high-speed mixer, stir at low speed, add trioctyl trimellitate and di-secondary octyl phthalate, stir at high speed, melt and blend at 70°C for 15 minutes, then add the first material obtained in step (1), continue Stir at high speed to 90°C and crosslink for 25 minutes at this temperature;

[0066] (3) Add algin, lubricant and antistatic agent, continue to stir and react at high speed for 10 minutes to obtain a mixture;

[0067] (4) Add the mixture obtained in step (3) to a twin-screw extruder for blending and extrusion, and then granulate to obtain pellets;

[0068] (5) The pellets obtained in step (4) are added to an extruder for molding, sizing, traction, and cutting to obtain a PVC power cable sheath;

[0069] Among them, in step (1), the mass ratio of light calcium carbonate, silane coupling agent, coated red phosphorus masterbatch, ammonium polyphosphate and decabromodiphenyl ether is 1: 0.6: 0.1: 0.3: 0.2; Calcium carbonate is nano-active light calcium carbonate with an average particle size of 50nm or less; the particle size of the coated red phosphorus masterbatch is 1200 mesh, and the effective phosphorus content is 90%;

[0070] In step (2), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer, styrene-butadiene block copolymer, thermoplastic polyester elastomer (TPEE), polyarylether nitrile-polysiloxane intercalation The mass ratio of the segment copolymer, trioctyl trimellitate, di-secondary octyl phthalate and the first material is 80: 20: 10: 12: 7: 8: 3: 10;

[0071] In step (3), the added amounts of algin, lubricant and antistatic agent are 3%, 6%, and 1% of polyvinyl chloride (PVC) respectively; the lubricant is a mixture of polyethylene wax and stearic acid. The mass ratio is 1:1.3; the antistatic agent is carbon black;

[0072] The rotating speed of low-speed stirring is 400rpm, and the rotating speed of high-speed stirring is 900rpm;

[0073] In step (4), the rotation speed of the two screws of the twin-screw extruder is 300 rpm, and the feed port to the extrusion port are divided into four parts, and the temperatures are 150°C, 175°C, 180°C, and 200°C in sequence; twin screw extrusion The vacuum degree in the barrel of the machine is 0.02MPa;

[0074] A PVC power cable sheath, which is obtained by the above preparation method;

PUM

Property	Measurement	Unit
The average particle size	<= 50.0	nm
Particle size	1200.0	mesh

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

high strength
good toughness

PVC (Polyvinyl Chloride) power cable protective sleeve and preparation method thereof

A technology for power cables and sheath tubes, applied in the field of PVC power cable sheath tubes and its preparation, to achieve the effects of ensuring cross-linking effects, improving mechanical properties, and good toughness

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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