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Leadless PVC pipe and preparation method thereof

A technology for PVC pipes and raw materials, applied in the field of lead-free PVC pipes and their preparation, can solve the problems of poor calcium and zinc and rare earth stability in the later stage, health hazards of production workers, and easy to cause pollution, etc., and achieve good early-stage hue and reliability. High and practical effect

Inactive Publication Date: 2019-01-04
ZHEJIANG SANLENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stabilizers with good stability generally contain lead, which is easy to cause pollution; calcium-zinc, rare earth, and organotin are lead-free stabilizers, but the stability of calcium-zinc and rare earth is not good in the later stage, so they need to be added in larger quantities ; Long-term contact with organic tin will cause poisoning symptoms, which is harmful to the health of production workers

Method used

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  • Leadless PVC pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In Example 1, a lead-free PVC pipe is made of the following raw materials in parts by weight: 80 parts of polyvinyl chloride, 1 part of titanium dioxide, 6 parts of bamboo activated carbon powder, 3 parts of filler, 2 parts of lubricant, 1 part of toughening agent.

[0027] The preparation method of above-mentioned lead-free PVC pipe material, comprises the steps:

[0028] (1) Preparation of bamboo activated carbon powder: bamboo chips and phosphoric acid solution are mixed and kneaded for 10-30min, wherein, the impregnation ratio of the bamboo chips and the phosphoric acid solution is 1:1.4; the particle size of the bamboo chips is 6 mesh, the water content of the bamboo chips is 12%; the concentration of the phosphoric acid solution is 50%; the kneaded material is directly contacted with the flue gas at 400°C for 3.5 hours in countercurrent, so that the material is carbonized and activated Finally, the activated material is obtained, and after the activated material ...

Embodiment 2

[0034] In Example 2, a lead-free PVC pipe is made of the following raw materials in parts by weight: 100 parts of polyvinyl chloride, 5 parts of titanium dioxide, 10 parts of bamboo activated carbon powder, 7 parts of filler, 4 parts of lubricant, 3 parts of toughening agent.

[0035] The preparation method of above-mentioned lead-free PVC pipe material, comprises the steps:

[0036] (1) Preparation of bamboo activated carbon powder: bamboo chips and phosphoric acid solution are mixed and kneaded for 10-30min, wherein, the impregnation ratio of the bamboo chips and the phosphoric acid solution is 1:1.6; the particle size of the bamboo chips is 35 mesh, the water content of the bamboo chips is 20%; the concentration of the phosphoric acid solution is 55%; the kneaded material is directly contacted with the flue gas at 650°C for 4.5 hours in countercurrent, so that the material is carbonized and activated Finally, the activated material is obtained, and after the activated mate...

Embodiment 3

[0042] In this embodiment 3, a kind of lead-free PVC pipe material, described PVC pipe material is made of the raw material of following parts by weight: polyvinyl chloride 85 parts, titanium dioxide 2 parts, bamboo activated carbon powder 7 parts, filler 4 parts, 2.5 parts of lubricant, 1.5 parts of toughening agent.

[0043] The preparation method of above-mentioned lead-free PVC pipe material, comprises the steps:

[0044](1) Preparation of bamboo activated carbon powder: bamboo chips and phosphoric acid solution were mixed and kneaded for 20min, wherein the impregnation ratio of the bamboo chips to the phosphoric acid solution was 1:1.5; the particle size of the bamboo chips was 20.5 mesh , the water content of the bamboo chips is 16%; the concentration of the phosphoric acid solution is 52.5%; the kneaded material is directly contacted with the flue gas at 525° C. for 4 hours, so that the material is carbonized and activated to obtain activation material, the activated m...

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Abstract

The invention discloses a leadless PVC pipe. The leadless PVC pipe is prepared from, by weight, 80-100 parts of polyvinyl chloride, 1-5 parts of titanium dioxide, 6-10 parts of bamboo activated carbonpowder, 3-7 parts of filling agent, 2-4 parts of lubricating agent and 1-3 parts of flexibilizer. The invention further discloses a preparation method. The preparation method comprises the steps of preparation of the bamboo activated carbon powder, raw material preparation, ultrasonic emulsification and extrusion molding. According to the leadless PVC pipe, the bamboo activated carbon powder is adopted as a stabilizer, and pollution to the environment is reduced; meanwhile, the raw material source is wide, so that the processed pipe is low in mobility, smell and volatile organic compound vaporability, good in early hue and excellent in transparency, is suitable for being recycled, and meets secondary processing needs; an ultrasonic emulsification process is adopted in the processing process, so that the processed pipe is better in toughness, meets the use needs of different corrosions for the PVC pipe, and is high in reliability and practicality.

Description

technical field [0001] The invention relates to the technical field of PVC pipe preparation, in particular to a lead-free PVC pipe and a preparation method thereof. Background technique [0002] Granular activated carbon is often used to adsorb molecules, the adsorption of granular activated carbon determines the applicability, and the adsorption is related to the pore size distribution of various carbon types. Take peat-based, lignite-based and coconut shell-based powdered activated carbons activated by steam as examples: peat-based activated carbons have micropores and mesopores, and granular activated carbons can be used in a variety of applications; lignite-based carbons have more mesopores and granular activated carbons Activated carbon also has large mesopores, which provide excellent penetration; coconut shell-based granular activated carbons are mainly micropores, which are only suitable for the removal of low molecules. The main chemical performance indicators of g...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L91/00C08K7/24C08K3/22C08K3/26C08K5/098C08K13/04
CPCC08K2003/2241C08K2003/265C08L27/06C08L2201/10C08L2203/18C08L91/00C08K7/24C08K3/22C08K3/26C08K5/098C08K13/04
Inventor 王绍法
Owner ZHEJIANG SANLENG PLASTIC
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