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Antifouling atactic polypropylene and modified superhigh-molecular-weight polyethylene composite pipe

A polyethylene composite pipe, ultra-high molecular weight technology, applied in the field of composite pipes, to achieve the effects of preventing secondary pollution, improving anti-fouling performance, and long service life

Active Publication Date: 2018-05-11
LINHAI WEIXING NEW BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary PPR pipes can no longer meet the current multi-functional needs. Combined with the excellent performance of modified ultra-high molecular weight polyethylene, a new type of anti-fouling pipe is prepared by compounding hot melt adhesive and ordinary PPR. Its excellent High-strength and anti-fouling properties have great market potential in high-end piping systems

Method used

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  • Antifouling atactic polypropylene and modified superhigh-molecular-weight polyethylene composite pipe
  • Antifouling atactic polypropylene and modified superhigh-molecular-weight polyethylene composite pipe
  • Antifouling atactic polypropylene and modified superhigh-molecular-weight polyethylene composite pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] a) Preparation of compounded hot melt adhesive: put 6 kg of silane cross-linked modified polyethylene, 50 kg of maleic anhydride modified polyethylene, and 38 kg of maleic anhydride modified polypropylene in a mixer and stir for 3 minutes, then add 2 kg of butyl titanate was stirred for 5 minutes;

[0022] b) Preparation of PP-R outer layer formula: 100 kg of random copolymerized polypropylene, 2 kg of black masterbatch, stirred for 5 minutes and left to stand for use;

[0023] c) Preparation of modified ultra-high molecular weight polyethylene inner layer formula:

[0024] Step 1: Preparation of nano-titanium dioxide antibacterial masterbatch:

[0025] Put 50 kilograms of granular Type II PERT in a mill and grind it into powder, then mix 50 kilograms of PERT powder, 10 kilograms of nano-titanium dioxide, and 2 kilograms of PE wax in a high-mixer for 6 minutes. The stirred raw materials are poured into the twin-screw granulator for granulation, and the nano-titanium d...

Embodiment 2

[0031] a) Preparation of compounded hot melt adhesive: put 7.5 kg of silane cross-linked modified polyethylene, 40 kg of maleic anhydride modified polyethylene, and 25 kg of maleic anhydride modified polypropylene in a mixer and stir for 3 minutes, then add 3 kg of butyl titanate was stirred for 5 minutes.

[0032] b) Preparation of PP-R outer layer formula: 100 kg of random copolymerized polypropylene and 3 kg of black masterbatch were stirred for 5 minutes and left to stand for use.

[0033] c) Preparation of modified ultra-high molecular weight polyethylene inner layer formula:

[0034] Step 1: Preparation of nano-titanium dioxide antibacterial masterbatch:

[0035] Put 50 kilograms of granular Type II PERT in a mill and grind it into powder, then mix 50 kilograms of PERT powder, 10 kilograms of nano-titanium dioxide, and 2 kilograms of PE wax in a high-mixer for 6 minutes. The stirred raw materials are poured into the twin-screw granulator for granulation, and the nano-t...

Embodiment 3

[0041] a) Preparation of compound hot melt adhesive: put 4 kg of silane cross-linked modified polyethylene, 40 kg of maleic anhydride modified polyethylene, and 30 kg of maleic anhydride modified polypropylene in a mixer and stir for 3 minutes, then add 3.5 kg of butyl titanate was stirred for 5 minutes.

[0042] b) Preparation of PP-R outer layer formula: 100 kg of random copolymerized polypropylene and 4 kg of black masterbatch were stirred for 5 minutes and left to stand for use.

[0043] c) Preparation of modified ultra-high molecular weight polyethylene inner layer formula:

[0044] Step 1: Preparation of nano-titanium dioxide antibacterial masterbatch:

[0045] Put 50 kilograms of granular Type II PERT in a mill and grind it into powder, then mix 50 kilograms of PERT powder, 10 kilograms of nano-titanium dioxide, and 2 kilograms of PE wax in a high-mixer for 6 minutes. The stirred raw materials are poured into the twin-screw granulator for granulation, and the nano-tit...

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Abstract

The invention relates to an antifouling atactic polypropylene and modified superhigh-molecular-weight polyethylene composite pipe. The pipe is prepared by adopting a co-extrusion integrated forming process for processing an inner layer, a middle layer and an outer layer in a molten state, wherein the inner layer of the composite pipe is a modified superhigh-molecular-weight polyethylene layer, themiddle layer is a compound hot melt adhesive layer, and the outer layer is an atactic copolymerization polypropylene (PPR) layer. In the invention, modified superhigh-molecular-weight polyethylene, ahot melt adhesive and copolymerized polypropylene are compounded in the molten state, and compounding of the hot melt adhesive guarantees a dense structure and complete integration between two material composite layers. The antifouling PPR and the modified superhigh-molecular-weight polyethylene composite pipe of the present invention has good processing performance, good low-temperature resistance, fouling resistance and low manufacturing cost, and is a novel pipe for transferring hot and cold water, and is applicable to waterway systems of high-end home furnishings.

Description

technical field [0001] The invention belongs to the technical field of composite pipes, and in particular relates to a high-temperature resistant anti-scaling random polypropylene and modified ultra-high molecular weight polyethylene composite pipe that can be used in hot water pipeline systems. Background technique [0002] Ultra-high molecular weight polyethylene has the advantages of self-lubrication, super wear resistance, corrosion resistance, and high strength, but it is very difficult to process. The modified ultra-high molecular weight polyethylene has good processing performance and maintains the original performance, so it has great market application prospects. Ordinary PPR pipes can no longer meet the current multi-functional needs. Combined with the excellent performance of modified ultra-high molecular weight polyethylene, a new type of anti-fouling pipe is prepared by compounding hot melt adhesive and ordinary PPR. Its excellent High-strength and anti-fouling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K3/22C08J3/22C09J123/08C09J123/14C09J123/26C09J11/06F16L9/12B32B27/32B32B27/08B32B27/18B32B1/08B29C47/06B29L23/00B29L9/00
CPCB29C48/09B29C48/18B29L2009/00B29L2023/22B32B1/08B32B27/08B32B27/18B32B27/32B32B2307/306C08J3/226C08J2323/06C08J2423/06C08J2423/08C08K2003/2241C08K2201/011C08L2201/08C08L2203/18C08L2205/03C09J11/06C09J123/0869F16L9/121C08L23/14C08L23/26
Inventor 高莉张伟娇毛星剑黄咸伟
Owner LINHAI WEIXING NEW BUILDING MATERIALS CO LTD
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