High-strength polyolefin composite pipe and preparation method thereof

A polyolefin and composite pipe technology, applied in the field of polyolefin pipes, can solve the problems of reduced performance and poor use effect, and achieve the effects of high tensile strength, excellent anti-penetration performance, and improved strength and heat resistance.

Active Publication Date: 2021-10-22
JINSU ENTERPRISE GRP SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the processing process of existing heating pipes, polyolefin is generally used as the inner pipe, and the outer layer is covered with an oxygen barrier layer. However, when the oxygen barrier layer is set as the outermost layer, the performance is likely to decrease due to environmental changes, and the actual use effect is poor. Based on the above situation, we designed a high-strength polyolefin composite pipe and its preparation method to solve this technical problem

Method used

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  • High-strength polyolefin composite pipe and preparation method thereof
  • High-strength polyolefin composite pipe and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A method for preparing a high-strength polyolefin composite pipe, comprising the following steps:

[0036] (1) Take nickel hydroxide and germanium dioxide, dissolve them in deionized water, add sodium hydroxide, adjust the pH to 11, react at a constant temperature for 60 hours under sealed conditions, and the reaction temperature is 210 ° C, cool naturally after the reaction, transfer the sample and filter , washed with deionized water, and dried in vacuum at 100°C for 5 hours to obtain a reinforcing material; the molar ratio of germanium and nickel is 2:3;

[0037] (2) Take reinforcing material and ethanol, ultrasonically disperse for 10min, add 3-aminopropyltriethoxysilane, stir and react at 25°C for 5h, centrifuge and wash, vacuum dry, transfer to tetrahydrofuran solvent, ultrasonically disperse for 15min, add Trimellitic anhydride, stirred and reacted at 25°C for 7 hours, collected by centrifugation, washed with deionized water, and dried in vacuum to obtain carboxy...

Embodiment 2

[0045] A method for preparing a high-strength polyolefin composite pipe, comprising the following steps:

[0046] (1) Take nickel hydroxide and germanium dioxide, dissolve them in deionized water, add sodium hydroxide, adjust the pH to 11, react at a constant temperature for 65 hours under sealed conditions, and the reaction temperature is 205 ° C, cool naturally after the reaction, transfer the sample and filter , washed with deionized water, and dried in vacuum at 103°C for 4.5 hours to obtain a reinforcing material; the molar ratio of germanium and nickel is 2:3;

[0047] (2) Take reinforcing material and ethanol, ultrasonically disperse for 15min, add 3-aminopropyltriethoxysilane, stir and react at 28°C for 4.5h, centrifuge and wash, vacuum dry, transfer to tetrahydrofuran solvent, ultrasonically disperse for 18min, Add trimellitic anhydride, stir and react at 25°C for 7.5 hours, collect by centrifugation, wash with deionized water, and dry in vacuum to obtain carboxylated...

Embodiment 3

[0055] A method for preparing a high-strength polyolefin composite pipe, comprising the following steps:

[0056] (1) Take nickel hydroxide and germanium dioxide, dissolve them in deionized water, add sodium hydroxide, adjust the pH to 12, react at a constant temperature for 70 hours under sealed conditions, and the reaction temperature is 200 ° C, cool naturally after the reaction, transfer the sample and filter , washed with deionized water, and dried in vacuum at 105°C for 4 hours to obtain a reinforcing material; the molar ratio of germanium and nickel is 2:3;

[0057] (2) Take reinforcing material and ethanol, ultrasonically disperse for 20min, add 3-aminopropyltriethoxysilane, stir and react at 30°C for 4h, centrifuge and wash, vacuum dry, transfer to tetrahydrofuran solvent, ultrasonically disperse for 20min, add Trimellitic anhydride, stirred and reacted at 25°C for 8 hours, collected by centrifugation, washed with deionized water, and dried in vacuum to obtain carboxy...

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Abstract

The invention discloses a high-strength polyolefin composite pipe and a preparation method thereof. According to the high-strength polyolefin composite pipe, polybutylene serves as an inner pipe, the outer surface of the inner pipe is coated with an oxygen barrier layer, the oxygen barrier layer is an EVOH oxygen barrier layer, the outer surface of a flame-retardant layer is coated with a polyethylene outer pipe, hot melt adhesive is arranged between every two layers, and the layers are compounded through the hot melt adhesive to form the composite pipe. In order to improve the strength of the polyethylene composite pipe, polydopamine coated particles are introduced into the polyethylene outer pipe, and chrysotile has excellent mechanical properties such as good thermal stability and high tensile strength, so that the polydopamine coated particles are doped into polyethylene to improve the heat resistance and strength of the polyethylene; and the process is reasonable in design and simple to operate, and the prepared polyolefin composite pipe has excellent mechanical property and heat resistance, can be widely applied to the technical field of heating pipes and the like, and has relatively high practicability.

Description

technical field [0001] The invention relates to the technical field of polyolefin pipes, in particular to a high-strength polyolefin composite pipe and a preparation method thereof. Background technique [0002] Polyethylene (PE for short) is a thermoplastic resin obtained by polymerization of ethylene. In industry, it also includes copolymers of ethylene and a small amount of α-olefins. Polyethylene is odorless, non-toxic, feels like wax, has excellent low temperature resistance, good chemical stability, and can withstand most acids and alkalis. Insoluble in common solvents at room temperature, low water absorption, excellent electrical insulation. [0003] In the processing process of existing heating pipes, polyolefin is generally used as the inner pipe, and the outer layer is covered with an oxygen barrier layer. However, when the oxygen barrier layer is set as the outermost layer, the performance is likely to decrease due to environmental changes, and the actual use e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D23/00F16L9/14F16L57/02F16L57/04C08L23/06C08K9/10C08K3/32C08K3/22C08K3/36C08K7/04C08K9/02
CPCB29D23/001F16L9/14F16L57/02F16L57/04C08L23/06C08L2205/025C08L2203/18C08L2207/062C08L2207/066C08K2003/2241C08K2201/011C08K9/10C08K3/32C08K3/22C08K3/36C08K7/04C08K9/02Y02A20/20
Inventor 张杰邱善樟吴忠棉王建荣
Owner JINSU ENTERPRISE GRP SHANGHAI
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