PVC heat-resistant pipe and preparation method thereof

A technology of heat-resistant pipes and mass fractions, applied in the field of plastic processing, can solve the problems of insufficient heat resistance of PVC pipes, achieve the effects of shortening plasticizing time, improving impact strength and toughness, and good thermal stability

Inactive Publication Date: 2020-05-08
SHANGHAI SHANGSU HLDG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat resistance of PVC pipes made by this method is not good enough. The Vicat softening temperature of such PVC pipe products usually does not exceed 80 degrees Celsius. However, some pipeline fields have higher heat resistance requirements. PVC pipe products can not meet such heat resistance requirements

Method used

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  • PVC heat-resistant pipe and preparation method thereof
  • PVC heat-resistant pipe and preparation method thereof
  • PVC heat-resistant pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] formula:

[0025]

[0026] Preparation:

[0027] Step 1: Weigh various raw materials according to the mass parts in the formula.

[0028] Step 2: Put other raw materials except the impact modifier into a high-speed mixer, and stir at a speed of 600 rpm for 5 minutes to make them fully stirred and mixed evenly.

[0029] Step 3: Add the impact modifier into the high-speed mixer again, and continue to stir at 300 rpm for 25 minutes to obtain a uniformly mixed blend.

[0030] Step 4: Put the homogeneously mixed blend into the extruder, plasticize and extrude at a temperature of 160°C.

[0031] Step 5: After cooling, solidifying and shaping, the PVC heat-resistant pipe is obtained.

Embodiment 2

[0033] formula:

[0034]

[0035] Preparation:

[0036] Step 1: Weigh various raw materials according to the mass parts in the formula.

[0037] Step 2: Put other raw materials except the impact modifier into a high-speed mixer, and stir at a speed of 400 rpm for 10 minutes to make them fully stirred and mixed evenly.

[0038] Step 3: Add the impact modifier into the high-speed mixer again, and continue to stir at 450 rpm for 20 minutes to obtain a uniformly mixed blend.

[0039] Step 4: Put the homogeneously mixed blend into the extruder, plasticize and extrude at a temperature of 180°C.

[0040] Step 5: After cooling, solidifying and shaping, the PVC heat-resistant pipe is obtained.

Embodiment 3

[0042] formula:

[0043]

[0044] Preparation:

[0045] Step 1: Weigh various raw materials according to the mass parts in the formula.

[0046] Step 2: Put other raw materials except the impact modifier into a high-speed mixer, and stir for 15 minutes at a speed of 500 rpm to make them fully stirred and mixed evenly.

[0047] Step 3: Add the impact modifier to the high-speed mixer again, and continue to stir for 30 minutes at a speed of 350 rpm to obtain a well-mixed blend.

[0048] Step 4: Put the homogeneously mixed blend into the extruder, plasticize and extrude at a temperature of 220°C.

[0049] Step 5: After cooling, solidifying and shaping, the PVC heat-resistant pipe is obtained.

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PUM

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Abstract

The invention discloses a PVC heat-resistant pipe and a preparation method thereof. The PVC heat-resistant pipe is prepared from the following components in parts by mass: 60 parts of chlorinated polyvinyl chloride, 100 parts of PVC resin, 10-15 parts of nano calcium filler, 5-8 parts of calcium-zinc stabilizer, 0.6-1.2 parts of lubricant, 6-12 parts of anti-impact modifier, 2-3 parts of processing aid, 1-1.5 parts of titanium dioxide and 0.001-0.003 part of pigment. According to the formula, the components are properly selected, compatibility is reasonable, and the prepared PVC pipe is excellent in comprehensive performance in all aspects and particularly high in heat resistance.

Description

technical field [0001] The invention relates to the technical field of plastic processing, in particular to a PVC heat-resistant pipe and a preparation method thereof. Background technique [0002] Compared with traditional pipes, PVC pipes have the advantages of light weight, corrosion resistance, and small water flow resistance. Therefore, they are widely used in the fields of building fire protection, industrial production, and power cable protection engineering. [0003] The current production method of PVC pipes is: use chlorinated polyvinyl chloride and polyvinyl chloride (PVC) resin as the main raw materials, and then selectively add additives such as stabilizers, lubricants, fillers and color enhancers, and extrude them through an extruder. Finally, the production of pipes is completed through shaping, cooling, marking, cutting, inspection, packaging and other processes. However, the heat resistance of PVC pipes made by this method is not good enough. The Vicat soft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L27/24C08L51/04C08L23/30C08L23/06C08K3/26C08K3/22C08K13/02
CPCC08K2003/2241C08K2003/265C08K2201/011C08L27/06C08L2201/08C08L2203/18C08L2205/035C08L27/24C08L51/04C08L23/30C08L23/06C08K3/26C08K3/22C08K13/02
Inventor 潘心争陈忠陈军豪陈际
Owner SHANGHAI SHANGSU HLDG GRP
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