Low-temperature-impacting resistant PP-R composite pipe and manufacturing method thereof

A technology of low temperature impact resistance and PP-R, which is applied in the field of pipelines, can solve the problems of poor low temperature impact resistance, and achieve the effect of good low temperature impact resistance, excellent performance retention, and deformation avoidance.

Inactive Publication Date: 2015-07-22
杭州鸿雁管道系统科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The invention provides a low-temperature impact-resistant PP-R composite pipe and a preparation method thereof, which can solve the problem of poor low-temperature impact resistance of PP-R pipes in the prior art, and maintain the original excellent performance of PP-R pipes

Method used

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  • Low-temperature-impacting resistant PP-R composite pipe and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0049] Mix 100kg PP-R resin (Korean Petrochemical RP2400) and 1.5kg color masterbatch in a mixer for 3 minutes to obtain Mixture 1, which is bagged for later use.

[0050] 100kg PE-RT resin (DOWLEX TM 2344), 2kg color masterbatch was mixed and stirred for 3min to obtain mixture 2, which was bagged for subsequent use.

[0051] Put compound one and compound two into single-screw extruder one and extruder two respectively, the temperature of extruder one is 190-220°C, the temperature of extruder two is 190-220°C, The melt extruded by the machine passes through the co-extrusion die at the same time, and the PP-R composite pipe with good low temperature impact resistance can be obtained in one step.

Embodiment 1

[0052] Embodiment 1 controls the ratio of outer layer thickness to inner layer thickness to be 10, embodiment 2 controls the ratio of outer layer thickness to inner layer thickness to be 4, and embodiment 3 controls the ratio of outer layer thickness to inner layer thickness to be 1.

Embodiment 4～5

[0054] Mix 100kg PP-R resin (Korean Petrochemical RP2400) and 1.5kg color masterbatch in a mixer for 3 minutes to obtain Mixture 1, which is bagged for later use.

[0055] 100kg PE-RT resin (XSene XRT70) and 2kg color masterbatch were mixed and stirred for 3 minutes in a mixer to obtain mixture 2, which was bagged for later use.

[0056] Put compound one and compound two into single-screw extruder one and extruder two respectively. The melt extruded by the machine passes through the co-extrusion die at the same time, and the PP-R composite pipe with good low temperature impact resistance can be obtained in one step.

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Abstract

The invention discloses a low-temperature-impacting resistant PP-R composite pipe and a manufacturing method thereof. The PP-R composite pipe comprises at least two layers which are sequentially embedded in a sleeved mode from inside to outside. At least one of the at least two layers is the toughness layer. The PP-R composite pipe is formed in a once-extruded mode through a co-extrusion mold. The toughness layer is made of at least one kind of PE-RT resin, PB resin, PE-100 resin and PP-B resin. By means of the low-temperature-impacting resistant PP-R composite pipe and the manufacturing method thereof, the problem that a PP-R pipe in the prior art is poor in low-temperature-impacting resistance can be solved; in addition, the original excellent performance of the PP-R pipe are maintained.

Description

technical field [0001] The invention relates to the technical field of pipelines, in particular to a low-temperature impact-resistant PP-R composite pipe and a preparation method thereof. Background technique [0002] The microstructure of the polymer plays a decisive role in its performance. The main chain structure of the polymer has the greatest influence on the rigidity and flexibility of the molecular chain. For isotactic polypropylene, since the methyl groups on the main chain are spatially ordered Arrangement, so the internal rotation of the C-C bond on the main chain is hindered, the flexibility of the molecular chain is small, and the impact strength is low. Using the method of ethylene-propylene copolymerization, when propylene is polymerized, a small amount of ethylene is introduced for copolymerization. The effect is equivalent to introducing defects into the main chain of isotactic polypropylene, which reduces the average isotacticity and isotactic sequence leng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/12C08L23/06C08L23/14C08L23/08C08J3/22C08L23/20
CPCF16L9/12C08J3/22C08J3/223C08J2323/06C08J2323/08C08J2323/14C08J2323/16C08J2323/20C08J2353/00C08L23/06C08L23/0815C08L23/14C08L23/16C08L23/20C08L53/00C08L2205/02C08L2310/00
Inventor 谢松桂毛明忠黄华灵周晓清徐康
Owner 杭州鸿雁管道系统科技有限公司
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