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How to choose healthy toilet paper
How to choose healthy toilet paper 1 and oxidation bleaching method
Oxidative bleaching agent is used to destroy and dissolve the structure of lignin, thus improving the purity and whiteness of pulp. This bleaching agent includes Cl2, Clo2 and hypochlorite. At present, oxidative bleaching is still the main bleaching method. Oxidation bleaching agent will be gradually replaced by oxygen bleaching method because it is chlorine-containing bleaching and has serious pollution.
2. Reduction bleaching method
Reductive bleaching agent is used to change the structure of chromophore and decolorize it. Because it will not cause the loss of fiber components and can maintain the characteristics of the original pulp, it is especially suitable for bleaching pulp with high pulp yield such as ground wood pulp and chemical mechanical pulp. This bleaching agent includes zinc dithionite, sodium dithionite, hydrogen peroxide and sodium peroxide. The pulp bleached by reducing bleach has poor whiteness stability and will return to its original color after long-term illumination in the air.
3. Elemental chlorine bleaching (ECF)
Using ClO2 _ 2 instead of chlorine for bleaching will greatly reduce the content of chlorine-containing organic matter in bleaching wastewater, which is commonly known as elemental chlorine (ECF) bleaching technology. However, because ClO2 bleaching process will produce a small amount of elemental chlorine, strictly speaking, this is not absolute chlorine-free bleaching. Long before chlorine was banned, hypochlorite was banned because it contained highly toxic chloroform in bleaching wastewater.
4. Total chlorine-free bleaching (TCF)
Chlorine-free bleaching is bleaching with oxygen-containing chemicals such as H2O2, ozone and peracetic acid without using any chlorine-containing bleaching agent. Pentachloroisoprene bleaching is the most advanced paper towel bleaching process at present, which is healthy and environmentally friendly and harmless to human body.
Summary: Paper towels made by the first three bleaching processes all contain a lot of harmful substances such as fluorescent whitening agents. Weibang Paper introduces foreign advanced equipment and adopts pentachloride bleaching process to provide you with safe, environmentally friendly and healthy paper towels.
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