Processing and production of tarpaulin raw materials

In the production process of tarpaulin, the first thing to prepare is the processing and production of raw materials, and the materials are made into glue through various production processes, and then the subsequent forming processes such as heat sealing are carried out. First, under the condition of constant temperature water bath, add bone glue and water, stir and dissolve, then add sodium hydroxide solution to the mixture of bone glue and water, stir and dissolve, the temperature is 70-80 ℃, and the degradation time is 0.5-1h; add epoxy resin Chloropropane is used as a monomer to carry out cross-linking and copolymerization. The reaction temperature is 60-70 °C, and the reaction time is 1~2h. It is mechanically stirred by a tarpaulin factory, and the stirring speed is about 600r/min. During the reaction, the pH of the system should be ensured to be 10~ 11. The reactant was rapidly cooled to room temperature, and a desiccant was added to obtain a yellow-brown gum solution. According to the classification of the existing waterproof tarpaulin, the thickness of the tarpaulin generally ranges from 0.15mm to 1.2mm, and the thickness of the tarpaulin depends on the thickness of the yarn count. The density of the base fabric weaving and the thickness of the coating material, such as PVC coated tarpaulin, PVC coated cloth, knife scraping cloth, and the thickness of the colored tarpaulin, depend on the thickness of the base cloth yarn count. Textile density of base fabric and thickness of coating material; polyethylene cloth. The thickness of PVC transparent agricultural film depends on the weight of the raw material used. However, we cannot say that the thicker the tarpaulin, the better, nor the thinner the worse, because judging the quality of the tarpaulin depends on the quality of the gauze count, the density of the weaving, the quality of the coating raw materials, the ratio of the coating raw materials, etc. .
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