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High-impact-resistance PVC tube

A PVC pipe, high impact resistance technology, applied in the field of PVC pipe, can solve the problems of decreased strength and stiffness, reduced toughness of PVC material, volatilization under heat, etc., to achieve the effect of improving high temperature stability, tensile strength and impact resistance.

Inactive Publication Date: 2016-09-28
GUANGXI JINSHENG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to accurately grasp the amount of plasticizer added. Plasticizer is a low-molecular compound. If the amount added is not enough, the plasticizer cannot be well dissolved in the matrix, and a precipitation reaction will occur, and the plasticizer precipitated during processing It will be volatilized by heat, which in turn will reduce the toughness of PVC material; if too much plasticizer is added, the intermolecular force of the composite material will be further reduced, making its strength and rigidity greatly reduced

Method used

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  • High-impact-resistance PVC tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Formula: 100 parts of PVC resin with a polymerization degree of 800, 5 parts of titanium dioxide, 0.1 part of CPE, and 0.1 part of ACM.

[0021] 1) Premix PVC resin, titanium dioxide, CPE, and ACM in a high-speed mixer, and cool to obtain a premix;

[0022] 2) Melt and mix the premixed material with a torque rheometer at 160° C. and a rotational speed of 40 rpm for 2 to 10 minutes to obtain a composite material.

[0023] 3) Send the composite material into the twin-screw extruder, the screw speed is 100rpm, the barrel temperature is set: the feeding section is 160°C, the plasticizing section is 170°C, the head temperature is 180°C, and the output is high impact resistance PVC pipe.

Embodiment 2

[0025] Formula: 100 parts of PVC resin with a polymerization degree of 2000, 10 parts of titanium dioxide, 0.3 parts of CPE, and 0.3 parts of ACM.

[0026] 1) Premix PVC resin, titanium dioxide, CPE, and ACM in a high-speed mixer, and cool to obtain a premix;

[0027] 2) Melt and mix the premixed material with a torque rheometer at 180° C. and a rotational speed of 80 rpm for 10 minutes to obtain a composite material.

[0028] 3) Send the composite material into the twin-screw extruder, the screw speed is 120rpm, the barrel temperature is set: the feeding section is 175°C, the plasticizing section is 180°C, the head temperature is 195°C, and the output is high impact resistance PVC pipe.

Embodiment 3

[0030] Formula: 100 parts of PVC resin with a polymerization degree of 1500, 6 parts of titanium dioxide, 0.15 parts of CPE, and 0.15 parts of ACM.

[0031] 1) Premix PVC resin, titanium dioxide, CPE, ACM, and rare earth stearate in a high-speed mixer, and cool to obtain a premix;

[0032] 2) Melt and mix the premixed material with a torque rheometer at 170° C. and a rotational speed of 60 rpm for 8 minutes to obtain a composite material.

[0033] 3) Send the composite material into the twin-screw extruder, the screw speed is 110rpm, the barrel temperature is set: the feeding section is 170°C, the plasticizing section is 175°C, the head temperature is 190°C, and the output is high impact resistance PVC pipe.

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Abstract

The invention discloses a high-impact-resistance PVC tube. The high-impact-resistance PVC tube is prepared from, by weight, 100 parts of PVC resin, 5-10 parts of titanium dioxide, 0.1-0.3 part of CPE and 0.1-0.3 part of ACM. Compared with the prior art, according to the high-impact-resistance PVC tube, titanium dioxide and ACM are added in a PVC matrix, the tensile strength and impact-resistance strength can be improved, and the high-temperature stability is improved.

Description

technical field [0001] The invention relates to a PVC pipe, in particular to a high impact-resistant PVC pipe. Background technique [0002] As early as the 1950s, PVC (polyvinyl chloride) pipes were researched and developed abroad, and PVC pipes were widely used in indoor and outdoor water supply pipes. Since 1960, my country has begun to use PVC pipes in water supply projects. PVC pipes have excellent physical properties, good corrosion resistance, chemical stability and flame resistance, and are low in price. The intermolecular force of PVC is very strong, and the material will be deformed after being subjected to low-temperature impact force, and the molecular structure will be easily destroyed, resulting in poor impact resistance of PVC pipes, especially low-temperature impact performance. The melting temperature of PVC is very close to the decomposition temperature, with a difference of less than 5°C. If it is directly used for product processing, it will decompose di...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L23/28C08L51/06C08K3/22B29C47/92B29C48/92
CPCC08L27/06B29C48/92B29C2948/92704C08L2201/08C08L2203/18C08L2205/04C08L23/286C08L51/06C08K2003/2241
Inventor 韦俊有
Owner GUANGXI JINSHENG TECH DEV
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