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Special plastic composite additive and granulation processing method for PPR pipe

A technology of composite additives and pipes, which is applied in the field of production and the preparation of composite additives, can solve the problems of reduced additive effect, increased increase, poor breaking elongation, etc., to improve high and low temperature impact strength and high temperature water resistance Extraction performance, reduce the amount of additives, prolong the effect of breaking stretch

Inactive Publication Date: 2014-03-26
江苏汉光实业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the process of producing plastic pipes on the market generally adopts adding a single additive one by one in the polypropylene device, resulting in a short oxidation induction period of the produced pipes, low low-temperature impact strength and high-temperature water-resistant extraction performance, low elastic capacity, and disconnection. The elongation is poor, and the effect of additives is reduced due to the addition of additives for many times, resulting in an increase in the amount of increase, which increases the cost of use, and needs to be improved

Method used

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  • Special plastic composite additive and granulation processing method for PPR pipe
  • Special plastic composite additive and granulation processing method for PPR pipe
  • Special plastic composite additive and granulation processing method for PPR pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: A granulation processing method for making PPR pipes using the above-mentioned composite auxiliary agent, which is characterized in that it includes the following steps: first, 20% of antioxidant 330, 27% of antioxidant 168, 27% of antioxidant 1076, 8.5% of nucleating agent, 8.5% of acid remover, 5% of antistatic agent and 4% of chelating agent are put into the high-speed mixer according to the proportion and mixed, stirred for 45-60 seconds, and then the mixture is conveyed to the manufacturing plant through the screw feeder. The granulation operation is carried out in the granulator, the mixing temperature of the granulator is controlled to be less than 25°C, the temperature of the second stage is 55°C, the temperature of the machine head is 60°C, and the air cooling temperature is 25°C, and finally the cylindrical strip extruded by the granulator is The material is cooled by the air-cooling device of the conveyor belt. After the material is cooled, it pa...

Embodiment 2~8

[0009] Embodiment 2~8, with reference to embodiment 1, revise component mass percentage, make following table:

[0010]

[0011] Utilize the performance comparison of the PRR pipe produced by the composite additive of the present invention and the PRR pipe produced by the traditional additive:

[0012] 1. Comparison of melt index

[0013] Use the special plastic compound additive for PPR pipes of the present invention and traditional additives to compare the performance of PPR pipes:

[0014]

[0015] It can be seen from the above table that the special plastic compounding additive for PPR pipes of the present invention has the smallest change in melt index after multiple extrusions.

[0016] 2. Comparison of oxidation induction period

[0017] Use the special plastic compound additive for PPR pipes of the present invention and traditional additives to compare the performance of PPR pipes:

[0018]

[0019] It can be seen from the above table that the special plast...

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Abstract

The invention discloses a special plastic composite additive and a granulation processing method for a PPR pipe, which relates to the manufacturing of the PPR pipe and the preparation of the composite additive for the PPR pipe. Firstly, according to proportion, the composite additive disclosed by the invention is put into a high-speed mixer in proportion for stirring and mixing for 45-60 seconds; secondly, a mixture is conveyed to a pelletizer via a screw rod feeder to perform pelleting operation, the mixing temperature of the pelletizer is controlled below 25 DEG C, the two-stage temperature is controlled at 55 DEG C, the machine head temperature is controlled at 60 DEG C and the air cooling temperature is controlled at 25 DEG C; lastly, columnar material strips extruded out of the pelletizer are cooled via a conveyor belt air cooling device; after the material is cooled, powdery material is removed via a vibration and screening device, the product is obtained. According to the invention, the oxidation induction period of the PPR pipe can be increased to 100 minutes above, the high and low temperature impact strength and the high-temperature waterproof extraction performance of the PPR pipe are improved, the elastic capacity is enhanced, and the breaking elongation degree is increased.

Description

technical field [0001] The invention relates to the field of plastic pipe production, in particular to the production of a PPR pipe and the preparation of a composite auxiliary agent. Background technique [0002] At present, the process of producing plastic pipes on the market generally adopts adding a single additive one by one in the polypropylene device, resulting in a short oxidation induction period of the produced pipes, low low-temperature impact strength and high-temperature water-resistant extraction performance, low elastic capacity, and disconnection. The elongation is poor, and the effect of additives is reduced due to the addition of additives for many times, resulting in an increase in the amount of increase, which increases the cost of use, and needs to be improved. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention provides a special plastic compound for PPR pipes that effectively reduces the amount of add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K5/13C08K5/526C08K5/134
CPCC08K5/13C08K5/1345C08K5/526C08K2201/017C08L2201/08C08L2203/18C08L2207/14C08L23/14
Inventor 顾法明李正中
Owner 江苏汉光实业股份有限公司
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