Small-Scale Chinese Absorbent hygiene products Production: Workshop Formula, Ratios & Method

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Absorbent hygiene productsMost sanitary products are made of paper, absorbent cotton, gauze, etc. Utilize the capillary phenomenon between fibers to achieve the purpose of moisture absorption. However, the moisture absorption capacity is very low. Therefore, when there is excessive urine and blood, it is often difficult to absorb completely; even if the absorption is good, leakage often occurs and the clothes are contaminated. In order to prevent the above situation from happening, we have to use it in large quantities, which is neither convenient nor economical. There is an existing improvement method, which is to add some water-soluble polymer compounds to fiber products to improve moisture absorption capacity. There are three major categories of commonly used polymer compounds: the first category is natural polymer compounds, such as starch and gelatin; the second category is semi-synthetic polymer compounds; and the third category is synthetic polymer compounds. However, since these polymer compounds are water-soluble substances, they will form a gel when exposed to water. When the amount of water is too much, the gel state will undergo destructive changes and the water will leak out. In order to improve the water absorption performance, the polymer compound can be irradiated with rays, heated or added with catalysts, bridging agents, etc. to form a network structure to limit the dissolution of molecules and improve the water absorption capacity. The key is to control the number of molecules that can be dissolved. Japan's Nakamura Michichi has invented an effective method: using hydrophilic resin to increase water absorption capacity. Optional synthetic resins include block polymerization and graft polymers, which include two parts, the hardened part and the hydrophilic part. The hardened part easily forms crystallization or condensed phase, such as polystyrene, polyethylene, polypropylene, polyacrylonitrile, etc. They also have the property of preventing the hydrophilic part from absorbing water and dissolving. The hydrophilic part contains cationic, anionic or nonionic hydrophilic groups. There are several types of hydrophilic groups:1. Acrylic acid, methacrylic acid, 2-methylenesuccinic acid, maleic acid, etc.2. Methyl acrylate, ethyl methacrylate, acrylonitrile, methacrylonitrile, etc.3. Polybutadiene chain, polyisobutadiene chain, natural rubber, etc.How to make hydrophilic synthetic resin:1. Polystyrene-polybut:ene-polystyrene block copolymer (polystyrene …

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