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weihui City Shengyuan paper co., LTD.

Address:Weihui City, Henan Province, Xiayuan the 107 State Road side Phone:0373-2177067 2177222 2177333 Email:1272569648@qq.com Mobile:13462393691 Url:www.parephie.com

What is the difference between white paper and white cardboard?

Click:1344 date:2017/11/27 9:23:49
Whiteboard paper is a positive white and smooth, the back of the mostly gray cardboard, this cardboard is mainly used for single-sided color printing made of cartons for packaging. Orthographic board size is 787mm * 1092mm, or according to the order contract to produce other specifications or web. Whiteboard paper due to fibrous tissue is more uniform, the surface layer of filler and rubber composition, and the surface coated with a certain coating, and after calendering, so the cardboard texture is relatively close, the thickness is relatively uniform, the paper is generally The case are more white and smooth, with a more uniform ink absorption, the surface less powder and hair loss phenomenon, the paper is more tough and has good resistance to folding, but its higher water content, usually 10 %, There is a certain degree of flexibility, which will bring some impact on printing. The difference between whiteboard paper and coated paper, offset paper, letterpress paper is the degree of gram grams of paper, the paper is thick.
    Whiteboard paper is made from the pulp and layers of pulp in the multi-cylinder dryer cylinder paper machine or cylinder mixed paperboard made. Slurry is generally divided into flour paste (surface layer), two, three, four layers, the layers of pulp material fiber ratio is different, and the fiber ratio of each layer of pulp, but also according to the papermaking The quality is different.
    The first layer of the surface layer of pulp, requiring high brightness, with a certain intensity, usually with bleached kraft pulp or with part of bleached chemical pulp and white paper waste side pulp; the second layer lining, play isolation The role of the surface layer and the core, but also requires a certain degree of whiteness, usually with 100% mechanical pulp or light-colored waste pulp; the third layer is the core layer, the main role of filling to increase the thickness of cardboard to improve stiffness, The general use of mixed waste paper pulp or straw pulp, this layer of the thickest, high-quantitative cardboard commonly used several slot several times hanging pulp; the last layer is the bottom, with the appearance of cardboard to improve strength and prevent curling function, usually Paper pulp with a high rate of pulp or better waste paper as raw materials, the color of the bottom of the cardboard gray, but also can be produced according to the requirements of the other bottom color.
    White cardboard is used for printing business cards, envelopes, certificates, invitations and packaging and decorating cardboard, white cardboard for the flat paper, the size of the main: 880mm * 1230mm, 787mm * 1032mm. According to the quality level white cardboard is divided into A, B, C three.
Thick white cardboard firm, more quantitative, the quantitative 200 g / m2, 220 g / m2, 250 g / m2, 270 g / m2, 300 g / m2, 400 g / m2 and other specifications. White cardboard tightness is usually not less than 0.80 g / m3, whiteness requirements are higher, A, B, C third-class whiteness were not less than 92.0%, 87.0%, 82.0%. To prevent swill, white cardboard requires a greater degree of sizing, A, B, C and other three sizing degree of not less than 1.5mm, 1.5mm and 1.0mm. In order to maintain the smoothness of paper products, white cardboard should be thick firm, high stiffness and bursting strength, white card for different grades of different quantitative determination of its stiffness have different requirements, the greater the quantitative, the higher the level, quite The greater the degree of requirement, the general longitudinal stiffness should not be less than 2.10-10.6mN ? m, transverse stiffness should be not less than 1.06-5.30 mN ? m.
    A, B, C third-class burst resistance index of not less than 2.00KPa ? m2 / g, 1.60 KPa ? m2 / g and 1.20 KPa ? m2 / g. In order to ensure the printing ink evenly distributed and the appearance of the paper itself, the smoothness of the white card is not less than 20-40S. In addition, white cardboard paper should be flat, not allowed to have spots and streaks and other paper diseases, warping deformation is not allowed, the paper should be uniform fibrous tissue, dust no more than 0.2-1.5mm2 28 / m2 (A, etc. ), No more than 1.5mm2 dust.
    White cardboard is usually 100% bleached pulp as raw material, the surface, the bottom of kraft chemical softwood pulp, core hardwood chemical mechanical pulp, slurry after beating by adding calcium carbonate, barium sulfate and other fillers, with AKD for neutral heavy sizing, paper-making on a wire-net paper machine, calendering and coating, as required, after embossing to produce cardboard with special embossed pattern, Special embossed white cardboard may not check the smoothness and whiteness. In addition to white, through the pulp dyeing, but also produce a variety of color cardboard, then the whiteness, the other technical performance are consistent with the technical performance of white cardboard.
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