Technical Communication: Aspects Of Corrugated Boxes (2) - Corrugated Box - Gifts & Crafts

Corrugated paper Board material First, trees 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.

Second, the chemical composition of wood

Table for the softwood and hardwood 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 are 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 the timber is the main component of what, then most of its carbohydrate composition by more than about 60-80%; if the wood polysaccharides using dilute acid hydrolysis, we can know that it is composed of glucose, mannose, wood sugar, carbohydrate polymer composed of single sugars.

The major polysaccharide components of wood can be divided into cellulose hemicellulose, cellulose all

To all cellulose at room temperature with dilute alkali (for example, with 17,5% of NaOH Or 10-24% of KOH) to handle it, then the dissolution of wood in 15-30% of hemicellulose, cellulose is insoluble.

3, pulp Is the raw material of paper pulp, which is mainly produced by the wood, its manufacturing methods may be roughly as follows: chemical pulp and mechanical pulp and semi-chemical pulp (physical) pulp

1, chemical pulp Chemical pulp is the pulp in the manufacturing process, chemical Drugs Mainly made of paper 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 in the process of lignin than there is low utilization of raw materials and high production cost disadvantage.

(1) kraft 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 Swedish chemical plants to pulp by-product of Glauber's salt Preparation of the 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 The so-called waste paper pulp

is already used paper, put it like twist Juice Device installed in the machine as the ease, moving back and forth to each other coalescence twist the fiber down into porridge-like.

Corrugated Cardboard The end of the surface layer of pulp used in paper pulp waste, its major raw materials such as kraft paper and corrugated scrap, therefore very high levels.

Second, the distinction between paper and board

Divided according to the thickness of paper and cardboard, the square area will be used on the weight of more than 200g of thick as cardboard, less than 200g weight as paper. However, with the Machinery and equipment Materials, process technology improvements to improve the emergence of tissue, also known as light corrugated cardboard and paperboard, the areas of more than 200g of the secular provisions of the production machinery is also divided into heavy and light corrugated cardboard production line corrugated cardboard production line, the company the three existing production lines belong to the light cardboard cardboard production line.

Paper and board are about 5,000 in the world, China's production of paper and cardboard existing 500-600 species, for the main varieties of packaging Cardboard , Corrugated paper, White Board Paper, yellow paperboard, kraft paper, Glass Cardboard , Tar paper, Copper Paperboard, plastic sheet of paper, Coating Paper, Specialty Paper , Plastic coated base paper, etc., and manufacturing corrugated Carton Are mainly two kinds of cardboard and corrugated paper.

3, paper or cardboard identification of positive and negative

Either paper or cardboard are divided into positive and negative, in papermaking, the wet paper web contact surface to increase and negative, the other side is positive. Negative due to copper network access, fine fiber and filler loss of more show Screen Printing Therefore, the opposite is more rough. Face more closely to the nature of positive and negative significant differences. Its smoothness, more positive than negative high picking speed has more negative than positive; white spots better negative than positive, so paper and board has two sides.

Dual character of the Print Quality great. Typically, the positive smoothness, Sizing Degrees are good, so the printing performance . Make Boxes of facial tissue, paper must face outwards, to be moisture-proof printing and processing, paper or cardboard for this to identify positive and negative.

For linerboard, the color of the batter slurry than in the color well and is easy to identify the most negative, and some paper or cardboard is made with a multi-cylinder Paper Copy made, or after calendering machine calendar, the difference between its face anyway, not so obvious, at this time differential can use the following methods:

1, the direct observation method. Folding of paper or cardboard to observe the surface shape of the structure on both sides. If screen printing machine, a screen printing surface is negative, when naked eye is not clear, it can take a magnifying glass, or smooth Apparatus Measurement.

2, press the paper with carbon paper, observation method. The pressure of carbon paper on paper, and then observe the situation on paper to make a mark on paper, so that pressure traces of carbon paper on paper, can be drawn about width 13?, Long 51-76?'s A black mark observed when a smooth surface can be placed on the glass, according to a method identification.

3, with the coin method ( Aluminum ) Marking. The paper folded so that both sides placed on a flat surface, flat on both sides of a coin in the trace, and then observe the signs of the depth on both sides, traces of light as the negative side, this is because the net surface of the packing is low, scratches easily show .

4, paper or paperboard of vertical and horizontal differentiation

Paper and board by screen printing, there may be shaping the direction of the general and the board running parallel to the direction of the vertical, and running perpendicular to the horizontal.

Aspect to the usually used

by: gaga

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