White paper is a kind of positive white and smooth, many for grey board on the back of, the board is mainly used for single color printing is made after cartons used for packaging, or used in the design, handmade products. White paper is made up of MianJiang and each layer bottom pulp in paper machine manufacture paper with pulp. Paste is generally divided into MianJiang ( The surface) , two, three, four layers, each layer of the pulp fiber ratio is different, and the layers of pulp fiber ratio, and according to the quality of the copy paper. The first layer of the surface plasma, which requires high whiteness, have a certain strength, usually by bleached sulphate wood pulp bleaching or with addition of department chemical straw and waste paper pulp paper edge; The 2nd is lining, have the effect of isolation layer and core layer, white board paper also calls for a certain whiteness, usually with 100% mechanical wood pulp or waste paper pulp; light color The third layer for core layer, the main filling effect, in order to increase the thickness of the cardboard, stiffness of the progress, generally USES the mixed waste pulp or straw, this layer is the most thick, high quantitative paper designed board commonly used several net trough points a few back to hang pulp; The fourth floor to the bottom, have improve the look of the cardboard, progress strength, prevent the function of the crimp, tong is a commonly used high rate pulp or better waste pulp as raw material to manufacture paper with pulp, white board paper over the bottom color of gray, also can produce other bottom color as required.
In the past few decades, paper board manufacturers production has increased because of the use of paper board suppliers.
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