Corrugated Knowledge: Corrugated Board Raw Material (i)
Tree pulp and paper, you can use a variety of plant
Fiber Made, but as the raw material of paper or use most of the trees are non-
Timber Class. Chemical composition of wood
Following table for the softwood and hardwood in the typical chemical composition. It is difficult to accurately write the chemical formula of wood, because wood is composed of a combination of molecular formula compounds the natural product of the complex and uneven. The main components of wood
Cellulose (40-50%), hemicellulose (20-35%), wood (20-30%) and
Solvent The dissolved substances (3-3.5%). But it does not occur in the chemical composition of these structural changes and decomposition under the conditions of sorting out, it can be said is impossible. If you study what is the main component of wood, then the most is
Polysaccharide Category constitutes about 60-80%; if more than wood
Carbohydrate With dilute acid hydrolysis, they can know that it is composed of glucose, mannose, xylose and other carbohydrate polymer composed of single sugars.
Major polysaccharide components of wood can be divided into: cellulose, all cellulose, hemicellulose, the cellulose-wide use of dilute alkali at room temperature (eg, by 17.5%
NaOH Or 10-24% of KOH) to handle it, then the dissolution of wood in 15-30% of hemicellulose, cellulose is insoluble.
Pulp Paper is made from pulp, which is mainly produced by the wood, its manufacturing methods may be roughly as follows: chemical pulp, paper pulp, semi-chemical pulp, mechanical (physical) pulp
1, chemical pulp Chemical pulp is the pulp manufacturing process in order to mainly made of chemical pulp, of course, according to the use of drugs and manufacturing methods, there are certain differences. Get rid of the raw material in the middle layer of lignin and pulp cells compared with the process of lignin, there
Raw materials Use of low and high production cost disadvantage.
(1) Kraft paper Pulp Kraft pulp is a chemically produced pulp, also called
Sulfuric acid Salt pulp. Kraft is in Sweden, said the word meaning strong. As the chemical factory in Sweden
By-product Preparation of the pulp by Glauber copy paper system is very robust, and so called kraft paper.
(2) semi-chemical pulp Semi-chemical pulp is the use of chemical treatment, first timber containing part of the lignin is removed and then the remaining softened the wood with a mechanical pulp made of crumbled. That is in the manufacture of chemical treatment and mechanical processing on each half. Semi-chemical pulp of the purity and strength than wood bits that mechanical treatment of pulp pulp higher and yield was higher than the chemically produced chemical pulp.
2, Paper Pulp Paper pulp is already used so-called waste paper, put it like twist
Juice Devices like the ease machine devices, moving back and forth to each other coalescence twist the fiber down into porridge-like.
Corrugated Surface layer of cardboard used by the end of plasma
Waste paper pulp
, Its main raw materials such as kraft paper and corrugated scrap, so a high intensity.
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