Packaging paper: white cardboard, white cardboard, kraft paper, corrugated paper, boxboard paper, tea board paper, sheepskin, chicken skin paper, cigarette paper, silicone oil paper, paper cup (bag) base paper, coated paper, cellophane paper, oil-proof and moisture-proof paper, transparent paper, aluminum foil paper, trademark paper, label paper, fruit bag paper and blackboard paper.
Printing paper: coated paper, newsprint, lightweight coated paper, lightweight paper, offset paper, writing paper, bible paper, book paper, road paper, beige road paper and ivory road paper;
Industrial paper (mainly special paper for writing and packaging): release paper, carbon paper, insulating paper, filter paper, test paper, capacitor paper, cardboard paper, dust-free paper, impregnated paper, sandpaper and rust-proof paper;
Office culture paper: tracing paper, drawing paper, copy paper, art paper, copy paper, fax paper, printing paper, copy paper, photo paper, rice paper, thermal paper, color jet paper, film paper and sulfuric acid paper;
Household paper: toilet paper, facial tissues, napkins, diapers, sanitary napkins and wet tissues.
Extended data:
The raw materials for papermaking are mainly plant fibers. In addition to cellulose, hemicellulose and lignin, there are other components with less content, such as resin and ash. In addition, there are auxiliary ingredients such as sodium sulfate.
1, cellulose
In cotton, the content of cellulose is above 90%; Wood, reeds and fillers also contain 40-50% cellulose. From the point of view of papermaking, cellulose should be kept as much as possible in the pulping process to improve the pulp yield and paper strength.
2. Hemicellulose
Among plant fiber raw materials, the hemicellulose content in hardwood and grass raw materials can be as high as about 30%; Generally, it only contains about 20% in cork; Even less in cotton. In order to improve the pulping yield and paper strength, some hemicellulose should be kept as much as possible during pulping.
3. Lignin
In cork, lignin content accounts for about 30%, while grass materials generally contain about 20%, and cotton and flax do not contain lignin.
4. Resin
Generally, the content of raw materials is less, below 1%, but more in pine. They are sticky and easy to stick together. For example, they stick to the copper mesh and the press roller, which makes it difficult to make paper, and forms transparent resin spots on paper, which reduces the quality of paper. They are easy to react with alkali to produce soap, but soluble in water, so pine trees with much resin are generally pulped with alkali to reduce the harm.
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