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There are many varieties of paper bags, various kinds of paper materials, and many styles.
According to the material, it can be divided into: white cardboard paper bag, white paper bag, copper paper bag, kraft paper bag, and a small amount is made of special paper.
White cardboard: White cardboard is firm and thick, with high stiffness, bursting and smoothness. The paper surface is flat. The commonly used thickness is 210-300 grams of white cardboard, and the most used is 250g white cards. The paper bag printed with white cardboard has a full color and a very good texture. It is your first choice.
Copper paper: The characteristic of coated paper is that the paper surface is very smooth and flat, the whiteness is high, the smoothness is high, the gloss is good, and the printed graphics and pictures have a three-dimensional effect. The commonly used thickness is 128 g-300 g, and the copper paper The effect of printing is the same as that of white cardboard. The color is full and bright. Compared with white cardboard, it is less than white cardboard.
White kraft paper: white kraft paper has high bursting resistance, good toughness, high strength, stable thickness and stable color. According to relevant national regulations, supermarkets restrict the use of plastic bags, and foreign countries, Europe and the United States and other countries advocate the trend of using environmentally friendly paper bags, and strictly control plastics. Pollution, plastic bags will be replaced by environmentally friendly paper bags, and the prospects for white kraft paper are promising. Made of 100% pure wood pulp, environmentally friendly, non-toxic, environmentally friendly and recyclable, white kraft paper has good toughness, and it is not widely used for making environmentally-friendly garment tote bags and high-end shopping bags. Commonly used white kraft paper with a thickness of 120g-200g, the paper has no brightness and gloss, white kraft paper is not suitable for printing ink too much content.
Kraft paper: also known as natural kraft paper. It has a high tensile, high toughness, usually brownish yellow, high tear strength, burst strength and dynamic, are widely used in shopping bags, envelopes and the like. Common thickness 120 grams -300 grams brown kraft. Kraft paper generally suitable for monochromatic or color printing and color manuscript is not complicated. With respect to white cardboard, white paper box coated paper, kraft paper yellow lowest price.
Duplex board: a positive white paper is white and smooth, mostly the back duplex paperboard, commonly a thickness of 250 g -350 g, white paper side is white, one side is gray, relatively inexpensive white paper jam a little.
Black cardboard: a special type of paper, black on both sides. The characteristics of black cardboard are fine paper, transparent black, firm and thick, good folding resistance, smooth surface, good stiffness, good tensile strength and high bursting resistance. Commonly used black cardboard with a thickness of 120 grams - 350 grams. Since black cardboard inside and outside are black, the color pattern can not be printed, only suitable for stamping, hot silver technology. The bag made is also very beautiful.
According to the bag edge, the bottom and the back cover are different: there are four types of paper bags, such as an open bottom bag, an open-bonded bottom bag, a valve-type sewing bag, and a valve-type flat hexagon end-end adhesive bag.
According to the handle and the way of digging: NKK (punch and string), NAK (non-porous with rope, divided into no-fold and standard with mouth-folding type), DCK (cordless bag body boring handle), BBK (with The tongue is not punched).
According to the use: including portfolios, envelopes, handbags, cement bags, feed bags, wax paper bags, fertilizer bags, laminated paper bags, four-layer paper bags, medicine bags, clothing bags, food bags, shopping bags, gift bags, drinks bag. Different uses, the size of the design, including the thickness of the paper bag paper, have many requirements, so it should be customized according to the actual situation, to achieve twice the result with half the effort, economical, for material saving, green environmental protection, corporate capital investment, provided More protection.