Tissue paper is a kind of high-grade cultural industrial paper with very high production difficulty. The technical characteristics of the paper are as follows: High physical strength, excellent uniformity and transparency, good appearance, fine, smooth and smooth , No bubble sand, good printability. General printing paper production is divided into two basic processes of pulp and papermaking, pulp is to use mechanical methods, chemical methods or a combination of the two methods of dissociation of plant fiber raw material into pulp or bleached pulp. Papermaking is the suspension of pulp fibers in water, after a variety of processing combined to meet the requirements of the paper.
Paper mills generally need to store enough raw material for 46 months to allow the raw materials to undergo natural fermentation during storage, in order to facilitate pulping while ensuring the continuous production of paper mills. The preparation of the reeds, wheat straw and wood and other raw materials cut into pieces or pieces of wood and then put a small piece of raw materials into the digester plus chemical liquid, steam steaming, the raw materials into the pulp, or the wood to the mill wood Machine ground into pulp, but also after a certain degree of cooking and then ground into pulp. Then, the pulp is washed with plenty of water and removed from the chips, knots, rocks and sand in the pulp by screening and purifying. According to the requirements of the paper type, the bleach is used to bleach the pulp to the required whiteness, followed by the beating equipment for beating. And then add in the pulp paper to improve the performance of the filler, rubber, sizing agent and other accessories, and again for purification and screening, and finally sent to the paper machine through the Department of network water, squeezing dehydration, dryer drying, calender roll Take, and cut rewinder or cut to produce web and flat paper. If the production of coated paper to be produced, you need to dry the middle or after the production into a roll of paper coated by processing.
In addition to the above basic process, but also include some auxiliary processes, such as the preparation of cooking liquor, the preparation of bleaching solution, the preparation of rubber compounding and cooking waste and exhaust gas chemical and heat recovery, etc. How to determine whether it is a Really good copy paper? In fact, very simple, the first inspection of its appearance is smooth, delicate, uniform light of the second check its physical strength performance, indicating high tear, indicating the higher transparency of the copy paper, indicating the higher the quality. Usually good copy paper to 17g / m2 copy paper, for example, can usually reach up to 6-8 layers, extremely excellent up to 12 layers.