Zhejiang Dongda Paper Co.,Ltd
Add:Gaoyang Village, Chunjiang Avenue, Fuyang District, Zhejiang Province, 311421 China
White board is a kind of white and smooth, the back of the gray for the bottom of the cardboard, this cardboard is mainly used for single-sided color printing made of paper for packaging use. White paper is large size of 787mm * 1092mm, or according to the provisions of the contract to produce other specifications or roll paper. White paper as a result of relatively uniform fiber structure, the surface layer with filler and the composition of the compound, and the surface coated with a certain coating, and after multi-roll calendering, so the cardboard texture is relatively tight, the thickness is relatively uniform, the paper in general The case is more white and smooth, with a more uniform ink absorption, surface powder and hair loss phenomenon is less, paper is more tough and has a good folding resistance, but its high water content, generally in 10 % Or so, there is a certain degree of flexibility, which will bring a certain impact on the printing. White paper and coated paper, offset paper, letterpress paper is the difference between the paper grams of heavy, the paper is relatively thick.
White paper is made from the pulp and the bottom of the pulp in the multi-round multi-dryer paper machine or long round net mixed paperboard machine made of copy. The pulp is also generally divided into the pulp (surface layer), the second layer, the third layer, the four layers, the paper pulp ratio of each layer is different, and the fiber ratio of each layer of pulp, Quality is different.
The first layer for the surface layer of pulp, requiring high brightness, with a certain strength, usually using bleached kraft pulp or with part of the bleached chemical pulp and white paper waste paper pulp; the second layer for the lining, Surface layer and the role of the core layer, also requires a certain degree of whiteness, usually with 100% mechanical wood pulp or light-colored waste paper pulp; the third layer for the core layer, mainly from the filling effect to increase the thickness of cardboard, The use of mixed waste pulp or straw pulp, this layer of the thickest, high-quality cardboard commonly used several slots in several times hanging pulp; the last layer is the bottom, with improved cardboard appearance, improve strength, to prevent curling function, usually With a high rate of pulp or a good waste paper pulp as raw materials, cardboard surface color gray, can also be required to produce other bottom color.
Zhejiang Dongda Paper Co.,Ltd
Add:Gaoyang Village,Chunjiang Avenue,Fuyang District,Zhejiang Province,311421 China
Contact us:Liu Dong
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