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White board structure is what?

by:NEW BAMBOO PAPER     2020-09-14
Whiteboard paper mainly MianJiang and each layer bottom slurry, usually require multiple cylinder dryer machine or slotted network manufacture paper with pulp mixing board machine, the production process is more complex. Make a whiteboard paper pulp surface, two, three, four layers, different ratio of different fiber pulp, according to the quality of the copy paper, before the layers of pulp fiber proportion is also have certain difference. So let below small make up to introduce the composition of the four layers under the white board paper. The first layer of surface plasma, this layer to white degree have higher demands for strength at the same time also to have certain requirements. This layer of paper pulp usually adopt bleached sulphate wood pulp, or some paper and some through chemical paper pulp bleaching of straw. The second floor for the lining, the main effect for the surface layer and core layer for isolation, whiteness aspect also has certain requirements, usually use pure mechanical wood pulp or waste paper pulp light color; The third layer as the core layer, core layer is used to fill in order to increase the thickness of the cardboard and improve the strength. Mainly used in waste paper pulp or straw. Board thickness of the paper is the biggest, several commonly used network hang pulp trough points many times; The role of the last layer is the bottom of the underlying besides can I change the burning board appearance also can improve the speed to prevent curling. Through use of better to manufacture paper with pulp, waste pulp as raw material more than cardboard base color gray, can also according to the requirements in the production of other background color.
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