Factors affecting the thickness and bulk of cleanroom paper
The thickness and bulkiness of the dust-free paper are basically the same. Under the same basis, the larger the thickness, the better the bulkiness. In the field of sanitary materials, such as toilet paper, the thickness is often required, because the greater the thickness of the same amount of paper, the unit cost of the product will be greatly reduced. The main factors affecting the paper are:
1. Dust-free paper pulp factor: The longer the fluff pulp fiber, the higher the roughness, the better the bulk of the paper sheet; the kraft pulp of the kraft pulp is good; the softwood pulp is wider. The loft of the leaf pulp is good; the untreated pulp is better than the bulk of the treated pulp.
2. The higher the temperature and pressure of the dust-free paper compactor and the dust-free paper embossing machine, the tighter the paper is pressed, the worse the bulkiness and the smaller the thickness;
3. It is related to the retention rate of fine fibers in the forming section: we generally use 80 mesh carbon mesh in the production process, and the fine fibers below 1.0 mm account for about 5% of the total. If the vacuum degree of the forming part is controlled, the fine fiber is lost. Decreasing or recycling it can increase the bulkiness of the sheet;
4. It has a relationship with the transmission net (embossed net) used in the transmission net. The paper bulkiness produced by using the plain weave net is better than that of other large netting;
5, high quantitative paper sheet bulkiness is better than low quantitative, on the one hand because of the high retention rate of fine fibers in the formation of high-quantity paper sheets, on the other hand, the amount of glue used in high-quantity paper sheets is relatively low. Much more. For dust-free wiping paper, in addition to the above factors, the main factor affecting the bulkiness and thickness index is the oven temperature. In the process allowable range, the higher the temperature, the better the hot-melt bonding condition, and the bulkiness and The higher the thickness.