Kunshan cartons can be divided into many types according to different classification methods. Here is a brief summary: 1. Cartons are divided according to types, including single-tile cartons, double-tile cartons, color boxes; 2. According to the production method, they are divided into Color boxes (color boxes), ordinary kraft boxes, etc.; 3. If divided according to the basis weight of a single sheet (ie weight per square meter), there are k paper: 250g/m2, A paper: 175g/m2, B paper: 125g/m2, C paper: 125g/m2, core paper: 125g/m2 five categories.

The production of cartons in Kunshan Carton Factory requires technically that the length width are more than 2.5:1, the ratio of height to width is more than 0.15:1. So what does the length, width height of the carton specifically refer to? Usually when we measure the carton, the unit will be calculated in millimeters. Length (L): the long side dimension of the inner bottom area of the box; wide side (B): the short side dimension of the inner bottom area of the box; height (H): the top bottom dimensions of the box. After understanding the most basic composition of the carton, let's discuss the conventional technical requirements of the current Chinese carton production industry.

First of all, the qualified carton must be cut in place, neat, free of fronts, free pits, pits pits, the deviation of the unevenness of the surface paper, pit paper, inner paper does exceed 3mm. The carton knife jam No horizontal pits are allowed, carton forming square, seamless, no overlap, no damage stains on the surface, surface crack width of the cut-off mouth is no more than 8mm, the corrugated carton flap is opened closed 180o repeatedly for more than 5 times, facial inner There must be no cracks in the paper;

    Secondly, the carton size deviation of the Kunshan corrugated carton manufacturer: single corrugated box ±3mm, double corrugated box ±5mm, those who exceed this range are unqualified products, in addition, the width of the horizontal line of the carton, single corrugated box is more than 12mm, double corrugated paper The box is larger than 17mm, the fold line is in the center, there is no rupture disconnection, the box wall is allowed to have redundant indentation lines;

    Thirdly, the printed graphics characters on the box surface must be the same as the sample, clear, with the same color depth no more than 10mm. The first two letters of the manufacturer’s name should be printed on the outside of the box bottom cover. The width of the joint nails overlap tongue is 36-50mm. The metal nails should be nailed along the center line of the overlap part to win the diagonal nail (it becomes a 45-degree angle with the carton). The box nails should be neat, uniform, no corners;

    Finally, there are the following requirements in the production of color boxes (color boxes). The color boxes (color boxes) are visually inspected at a distance of 0.6mm the eyes under natural light. There is no obvious difference between the color the sample. The main pattern overprint allows a large deviation of 0.25mm, the width of the overlap tongue at the joint of the color box is less than 30mm. The adhesive of the bonding seam is evenly fully coated, so that the seam is still bonded when the tissue is separated, there should be no excess bonding over the seam.