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PPR pipe having high ageing resistance and manufacturing method thereof

A manufacturing method and aging-resistant technology, applied in the field of PPR pipe and its manufacturing, can solve the problems such as difficult to grasp the dosage and cumbersome process, and achieve the effects of improving anti-aging performance, increasing hardness and low-temperature brittleness, and saving raw materials

Active Publication Date: 2014-03-05
ANHUI ZHONGHONG PIPE IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of production process has defects such as cumbersome process and difficult dosage due to the addition of auxiliary agents.

Method used

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  • PPR pipe having high ageing resistance and manufacturing method thereof
  • PPR pipe having high ageing resistance and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Select 2 kilograms of PPR (Yanshan Petrochemical PPR powder C4420) and add 200 grams of micron-sized zinc powder, and put it into a high-speed mixer for thorough mixing; add 5 grams of DOP liquid medicine to the uniformly mixed PPR and zinc powder mixture, Put it into a molding machine and heat it to 230°C, keep it warm for 3 minutes to make a gelatinous raw material, put it into a twin-screw extruder to extrude and select pellets, and then use a single-screw pipe extruder for extrusion molding.

Embodiment 2

[0016] Example 2: Select 2 kg of PPR (Yanshan Petrochemical PPR powder C4420) and add 160 g of micron-sized zinc powder, put it into a high-speed mixer and mix it thoroughly; Put it into a molding machine and heat it to 200°C, keep it warm for 1 minute to make a gel-like raw material, put it into a twin-screw extruder to extrude and select pellets, and then use a single-screw pipe extruder to extrude the tube.

Embodiment 3

[0017] Example 3: Select 2 kilograms of PPR (Yanshan Petrochemical PPR powder C4420) and add 180 grams of micron-sized zinc powder, put it into a high-speed mixer for thorough mixing; add 4 grams of DOP syrup to the uniformly mixed PPR and zinc powder mixture, Put it into a molding machine and heat it to 210°C, keep it warm for 2 minutes to make a gelatinous raw material, put it into a twin-screw extruder to extrude and select pellets, and then use a single-screw pipe extruder to extrude the tube.

[0018] The anti-aging test of the produced PPR pipe is as follows:

[0019]

[0020] Note: The lower the gloss retention rate, the worse the chalking phenomenon caused by material aging

[0021] Low-temperature impact performance test on the manufactured PPR pipe:

[0022]

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PUM

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Abstract

The invention discloses a PPR pipe having high ageing resistance and a manufacturing method thereof. The manufacturing method includes selecting a PPR raw material, and adding a certain quantity of zinc powder and mixing uniformly; adding a DOP liquid into the uniform mixture of the PPR and the zinc powder; putting the mixture, to which the DOP liquid is added, into a forming machine, heating to 200-230 DEG C, maintaining the temperature for 1-3 min until the mixture is prepared into a colloidal raw material; putting the colloidal raw material into a double-screw extruder, extruding and sorting granules; and then extruding a pipe and forming by using a single-screw pipe extruder. By addition of the zinc powder, a ZnO layer can be formed both on the surface and internal of the pipe, thus enhancing the ageing resistance property of the pipe, and improving the hardness and low-temperature brittleness of the pipe. The PPR pipe has a broad market prospect.

Description

technical field [0001] The invention relates to a PPR pipe with high aging resistance and a manufacturing method thereof, belonging to the technical field of new plastic pipes. Background technique [0002] PPR (polypropylene random), also known as random copolymerized polypropylene (PPR), is a new generation of energy-saving and environmentally friendly building plastic pipes developed in the early 1990s. Its products have good toughness, high strength, and excellent processing performance. It has good creep resistance at relatively high temperature and has the unique advantages of high transparency of random copolymerized polypropylene. It can be widely used in the production of pipes, sheets, daily necessities, packaging materials, household appliances parts and various films. However, the PPR molecular chain structure - (-CH2-CH-)n- contains a large number of unstable tertiary carbon atoms, which is more susceptible to aging by CH3 light, oxygen, and impurities (such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08K3/08C08K5/12
CPCC08K3/08C08K5/12C08K2003/0893C08L2201/08C08L2203/18C08L2207/14C08L23/14
Inventor 刘忠斌
Owner ANHUI ZHONGHONG PIPE IND TECH
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