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Method for preparing high-temperature resistant plastic pipes for transferring hot spring

A technology of plastic pipes and high temperature resistance, applied in pipes, rigid pipes, mechanical equipment, etc., can solve the problems of low temperature, easy damage of machinery or pointed objects, poor compressive and tensile strength, etc., to improve the crystallization speed, Improved oxidation resistance and thermal processing stability, high compressive and tensile strength effects

Inactive Publication Date: 2012-07-04
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects of existing plastic pipes such as low long-term service temperature, poor compressive and tensile strength, and easy damage when encountering machinery or pointed objects, the invention provides a method for preparing plastic pipes for high-temperature hot spring transportation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] After removing impurities and dust from the recycled PET bottle, put it in a crusher, crush it into recycled material fragments of about 2.5mm×2.5mm, put it into an electric heating constant temperature blast drying oven, control the temperature at 130°C, dry it for 5 hours, and weigh it Put 65Kg of PET bottle recycled material fragments in a high-speed mixer, control the speed of the mixer to 250r / min, and the temperature at 108°C, add EEA8.5 Kg with a mass fraction of ethyl acrylate of 23% and a density of 0.866g / cm 3 Melt mass flow rate is OBC26Kg of 5.4g / 10min, particle diameter is 2-5 microns and purity is 99.5% zinc oxide 0.7 Kg, three (2,4-di-tert-butylphenyl) phosphite 0.9 Kg, stirring Mix for 10 minutes to form a mixture; place the mixture in the hopper of a parallel exhaust twin-screw extruder, and control the temperature of the extruder barrel: 188°C in zone I, 210°C in zone II, 228°C in zone III, and 228°C in zone IV Zone 245°C, Zone V 255°C, Zone VI 262°C, ...

Embodiment 2

[0022] After removing impurities and dust from the recycled PET bottle, put it in a crusher, crush it into recycled material fragments of about 2.5mm×2.5mm, put it into an electric heating constant temperature blast drying oven, control the temperature at 129°C, dry it for 5 hours, and weigh it Put 60Kg of recycled PET bottle fragments in a high-speed mixer, control the mixer speed at 250r / min, and the temperature at 107°C, add EEA6.5 Kg with a mass fraction of ethyl acrylate of 23% and a density of 0.866g / cm 3 Melt mass flow rate is OBC23Kg of 5.4g / 10min, particle diameter is 2-5 microns and purity is 99.5% zinc oxide 0.5 Kg, three (2,4-di-tert-butylphenyl) phosphite 0.7Kg, stirring Mix for 10 minutes to form a mixture; put the mixture in the hopper of a parallel exhaust twin-screw extruder, and control the temperature of the extruder barrel: 193°C in zone I, 205°C in zone II, 230°C in zone III, and 230°C in zone IV Zone 240°C, Zone V: 257°C, Zone VI: 260°C, Zone VII: 258°C, ...

Embodiment 3

[0024] After removing impurities and dust from the recycled PET bottle, put it in a crusher, crush it into recycled material fragments of about 2.5mm × 2.5mm, put it into an electric heating constant temperature blast drying oven, control the temperature at 131°C, dry it for 5 hours, and weigh it Put 69Kg of recycled PET bottle fragments in a high-speed mixer, control the mixer speed to 250r / min, and the temperature at 109°C, add EEA10.5 Kg with a mass fraction of ethyl acrylate of 23% and a density of 0.866g / cm 3Melt mass flow rate is 5.4g / 10min OBC30Kg, particle size is 2-5 microns and purity is 99.5% zinc oxide 0.9 Kg, three (2,4-di-tert-butylphenyl) phosphite 1.2 Kg, stirring Mix for 10 minutes to form a mixture; put the mixture in the hopper of a parallel exhaust twin-screw extruder, and control the temperature of the extruder barrel: 190°C in zone I, 208°C in zone II, 228°C in zone III, and 228°C in zone IV Zone 243°C, Zone V 255°C, Zone VI 258°C, Zone VII 260°C, die hea...

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Abstract

The invention relates to a method for preparing high-temperature resistant plastic pipes for transferring hot spring. The method comprises the steps of: taking 60-69 parts by weight of polyethylene terephthalate (PET) bottle reclaimed materials as raw materials, adding 6.5-10.5 parts by weight of ethylene-ethyl acrylate copolymer, 23-30 parts by weight of ethylene-octylene embedded copolymer, 0.5-0.9 parts by weight of zinc oxide and 0.7-1.2 parts by weight of tri (2,4-ditert-butylphenyl) phosphate, pulverizing, drying, stirring and mixing, extruding and granulating by a twin screw, extrudingand shaping by a single screw, pulling, cooling, shaping and cutting. A Vicat softening temperature of the pipes prepared by the method can achieve to 158 DEG C; when the pipes are used for a long time, the temperature can achieve to 105 DEG C; the pipe is high in compression and tension strength, is low in thermal coefficient and is good in thermal insulation property, and is suitable for the field of transferring the high-temperature hot spring.

Description

technical field [0001] The invention relates to a method for preparing a plastic pipe, in particular to a method for preparing a high-temperature-resistant plastic pipe for transporting hot springs. Background technique [0002] There are more than 2,400 hot springs in my country, and there are many hot springs in Yunnan, Guangdong, Fujian, Zhejiang, Jiangxi, Tibet, and Taiwan. Among them, Yunnan has the most hot springs, with more than 400 hot springs. With the development and application of hot spring resources, the demand for hot spring hot water transportation pipes is increasing day by day. Hot spring hot water delivery pipes are mainly ordinary steel pipes, stainless steel pipes, copper pipes, etc. Ordinary steel pipes are used as hot spring transportation pipes, which have the characteristics of high compressive strength, small linear expansion coefficient, and high temperature resistance; the disadvantages are: high thermal conductivity of pipes, poor thermal insula...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L23/08C08L53/00F16L9/12C08K13/02C08K3/22C08K5/526B29B9/06B29B17/02B29B13/06B29B7/28B29C47/92B29C47/88B29C47/34B29C48/90B29C48/09B29C48/355B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/09B29C48/911B29C48/913B29C48/919B29C48/90B29C2948/92895B29C2948/92904B29C48/40
Inventor 张华集张雯肖荔人陈晓
Owner FUJIAN NORMAL UNIV
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