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
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[0025] Example 1
[0026] In Example 1, a lead-free PVC pipe is made of the following parts by weight of raw materials: 80 parts by weight of polyvinyl chloride, 1 part of titanium dioxide, 6 parts of bamboo activated carbon powder, 3 parts of filler, 2 parts of lubricant and 1 part of toughening agent.
[0027] The preparation method of the above-mentioned lead-free PVC pipe includes the following steps:
[0028] (1) Preparation of bamboo-based activated carbon powder: mixing bamboo chips with phosphoric acid solution and kneading for 10-30 minutes, wherein the dipping 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 shavings is 12%; the concentration of the phosphoric acid solution is 50%; the kneaded material is in direct countercurrent contact with the flue gas at 400°C for 3.5h to carbonize and activate the material Afterwards, an activated material is obtained, and the activat...
Example Embodiment
[0033] Example 2
[0034] In Example 2, a lead-free PVC pipe is made of the following parts by weight of raw materials: 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 and 3 parts of toughening agent.
[0035] The preparation method of the above-mentioned lead-free PVC pipe includes the following steps:
[0036] (1) Preparation of bamboo activated carbon powder: mix bamboo chips with phosphoric acid solution and knead for 10-30 minutes, wherein the immersion 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 shavings is 20%; the concentration of the phosphoric acid solution is 55%; the kneaded material is in direct countercurrent contact with the flue gas at 650°C for 4.5h to carbonize and activate the material Afterwards, an activated material is obtained, and the activated material is ...
Example Embodiment
[0041] Example 3
[0042] In Example 3, a lead-free PVC pipe is made of the following parts by weight of raw materials: 85 parts by weight of polyvinyl chloride, 2 parts of titanium dioxide, 7 parts of bamboo activated carbon powder, 4 parts of filler, 2.5 parts of lubricant and 1.5 parts of toughening agent.
[0043] The preparation method of the above-mentioned lead-free PVC pipe includes the following steps:
[0044] (1) Preparation of bamboo-based activated carbon powder: mixing bamboo chips with phosphoric acid solution and kneading for 20 minutes, wherein the immersion ratio of the bamboo chips and the phosphoric acid solution is 1:1.5; the particle size of the bamboo chips is 20.5 mesh , The water content of the bamboo shavings is 16%; the concentration of the phosphoric acid solution is 52.5%; the kneaded material is in direct countercurrent contact with the flue gas at 525°C for 4h, so that the material is carbonized and activated to obtain activation After the activated m...
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