White paper is made up of MianJiang and each layer bottom slurry dryer machine or slotted in rotary screen mesh machine manufacture paper with pulp mixing board. 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, or with addition of some bleaching chemical straw and paper waste paper pulp; The 2nd is lining, have the effect of isolation layer and core layer, also requires 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, to improve the stiffness, generally USES the mixed waste pulp or straw, this layer is the most thick, quantitative high board commonly used several net trough points several times to hang pulp; The fourth floor is the underlying, have improve the look of the board, increase strength, prevent curl functions, usually with high rate pulp or better waste pulp as raw material to manufacture paper with pulp, white board paper over the bottom color gray, can also according to the requirements in the production of other background color. The above introduction part is about the whiteboard paper, hope to be of help! If necessary, welcome call consulting the choose and buy! !
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