Zhejiang Dongda Paper Co.,Ltd
Add:Gaoyang Village, Chunjiang Avenue, Fuyang District, Zhejiang Province, 311421 China
White cardboard is used for printing business cards, covers, certificates, invitations and packaging and decoration with a cardboard, white cardboard for the flat paper, its size is: 880mm * 1230mm, 787mm * 1032mm. According to the quality level white cardboard is divided into A, B, C three and so on.
White cardboard is thicker and firmer, and its mass is 200 g / m2, 220 g / m2, 250 g / m2, 270 g / m2, 300 g / m2, 400 g / m2 and so on. White cardboard tightness is usually not less than 0.80 g / m3, whiteness requirements are higher, A, B, C three degrees of whiteness were not less than 92.0%, 87.0%, 82.0%. In order to prevent swimming, white cardboard requires a greater degree of sizing, A, B, C three sizing degrees were not less than 1.5mm, 1.5mm and 1.0mm. In order to maintain the formation of paper products, white cardboard should be thicker and stronger, there is a high degree of stiffness and burst, for different levels of different quantitative white card has a different degree of stiffness requirements, the greater the amount, the higher the level, The greater the requirements, the general vertical stiffness should not be less than 2.10-10.6mN ?? m, lateral stiffness should not be less than 1.06-5.30 mN ?? m.
A, B, C three of the bursting index were not less than 2.00KPa ~ m2 / g, 1.60 KPa ~ m2 / g and 1.20 KPa ~ m2 / g. In order to ensure uniform distribution of ink and the appearance of the paper itself, white card smoothness of not less than 20-40S. In addition, the white cardboard paper should be flat, not allowed to have spots and stripes and other paper disease, does not allow warping deformation, paper fiber organization should be uniform, 0.2-1.5mm2 dust no more than 28 / m2 (A ), No more than 1.5mm2 of dust.
White cardboard is usually 100% bleached wood pulp as raw material, the surface layer, the bottom of the use of sulfide chemical softwood pulp, the core layer of hardwood chemical mechanical pulp, pulp after beating by adding calcium carbonate, barium sulfate and other fillers, AKD for moderate heavy sizing, in the stacking paper machine on the papermaking, and by calendering, coating treatment, according to the need, after embossing can be produced with a special embossed pattern cardboard, where with Special embossed white cardboard can not check the smoothness and whiteness. In addition to white, through the dyeing of the paste, but also the production of a variety of color cardboard, then in addition to whiteness, the other technical performance and white cardboard technical performance consistent.
Zhejiang Dongda Paper Co.,Ltd
Add:Gaoyang Village,Chunjiang Avenue,Fuyang District,Zhejiang Province,311421 China
Contact us:Liu Dong
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