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Quick-cooling anti-impact PPR pipe as well as preparation method and application thereof

A quick-cooling and pipe technology, which is applied in the field of quick-cooling and impact-resistant PPR pipes and their preparation, can solve the problems of poor low-temperature impact resistance, low production efficiency, and long cooling time of PPR pipes.

Active Publication Date: 2021-05-28
湖南联塑科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of long cooling time in the preparation process of PPR pipes in the prior art, low production efficiency, and poor low-temperature impact resistance of the prepared PPR pipes, and provide a quick-cooling and impact-resistant PPR pipe

Method used

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  • Quick-cooling anti-impact PPR pipe as well as preparation method and application thereof
  • Quick-cooling anti-impact PPR pipe as well as preparation method and application thereof
  • Quick-cooling anti-impact PPR pipe as well as preparation method and application thereof

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Embodiment 1～10

[0034] This embodiment provides a series of quick-cooling and impact-resistant PPR pipes. According to the raw material composition in Table 1, the specific preparation includes the following steps:

[0035] After uniformly mixing random copolymerized polypropylene, α-nucleating agent, elastomer toughening agent, talc powder, coupling agent and additives, the uniformly mixed mixture is melted, extruded, and cooled by a single-screw extruder and granulation,. Among them, the temperature of the screw in the single-screw extruder is 185-200°C, the temperature of the mold is 190-205°C, the blank at the die enters the vacuum box for vacuum cooling and shaping, the water tank is cooled, and the length is cut (DN20, 2.0 MPa), to obtain the random copolymerized polypropylene pipe for the rapid cooling type, low-temperature shock-resistant cold and hot water, the thickness of the pipe is 2.8mm.

[0036] Each embodiment raw material composition of table 1 (weight part)

[0037]

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Abstract

The invention provides a quick-cooling anti-impact PPR pipe as well as a preparation method and application thereof. The quick-cooling anti-impact PPR pipe comprises the following components in parts by weight: 100 parts of polypropylene random copolymer; 1-4 parts of an alpha nucleating agent; 3-8 parts of an elastomer toughening agent; 0.05-0.5 part of talcum powder; 0.01-0.1 part of a coupling agent; and 0-10 parts of an auxiliary agent. The particle size of the talcum powder is 10-20 [mu]m, the elastomer toughening agent is a propenyl elastomer, the hardness shore A is 75-90, the tensile elongation at break is greater than or equal to 700%, and the tensile strength is greater than or equal to 13 MPa. The cooling rate of the prepared quick-cooling impact-resistant PPR pipe can be as low as 1.80 DEG C / s, the production speed is increased by at least 19%, the pipe has good low-temperature impact resistance, the notch simply supported beam impact strength at -20 DEG C can reach 25 MPa, the low-temperature drop hammer impact passing rate is increased by at least 52.8%, and the hydrostatic experiment passing rate under the conditions of 20 DEG C, 1 h and 95 DEG C and 22 h is 100%. The long-term use requirement of the PPR pipe is met.

Description

technical field [0001] The invention belongs to the technical field of plastic pipes, and in particular relates to a quick-cooling and impact-resistant PPR pipe and its preparation method and application. Background technique [0002] PP-R (random copolymer polypropylene) pipe is environmentally friendly, corrosion-resistant, long service life, has good thermal welding performance, easy installation, good long-term creep resistance and pressure bearing performance under high temperature conditions, and is suitable for home installation The hot and cold water pipe market has developed rapidly and is widely used in domestic water supply in industrial and residential buildings. [0003] At present, in the PPR pipe formulation, the low-temperature impact performance of the pipe is usually improved by adding a β-nucleating agent (such as Chinese patent CN106380698A), but the nucleation conditions are harsh and the toughening effect is limited, and the existing formulation is used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/10C08K3/34C08K5/52
CPCC08L23/14C08K2201/003C08L2203/18C08L23/10C08K3/34C08K5/52
Inventor 宋科明杨晏茏余华林谢铖山
Owner 湖南联塑科技实业有限公司
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