There are many varieties of paper bags, various paper materials, and many styles, which can be displayed in various forms.
According to the material, it can be divided into: white cardboard bags, white board paper bags, coated paper bags, kraft paper bags, and a small amount is made of special paper.
White cardboard: White cardboard is firm and thick, with high stiffness, burst resistance and smoothness, and the paper surface is flat. The commonly used thickness is 210-300 grams of white cardboard, and the most used is 230 white card. The paper bags printed on white cardboard are full of color and the texture of the paper is also very good. It is your first choice for customization.
Coated paper: The characteristics of coated paper are that the paper surface is very smooth and flat, with high whiteness, high smoothness, good gloss, and it also makes the printed graphics and pictures have a three-dimensional sense. The commonly used thickness is 128 grams-300 grams. The effect of coated paper printing is the same as that of white cardboard, with full and bright colors. Compared with white cardboard, the stiffness is not as good as white cardboard.
White kraft paper: White kraft paper has high burst resistance, good toughness, high strength, uniform thickness and stable color. According to relevant national regulations, supermarkets restrict the use of plastic bags, and foreign countries such as Europe and the United States advocate the trend of using environmentally friendly paper bags, strictly control plastic pollution, and plastic bags will be replaced by environmentally friendly paper bags. The market prospects of white kraft paper are promising. Made of 100% pure wood pulp, it is environmentally friendly and non-toxic, and can be recycled in an environmentally friendly manner. White kraft paper has good toughness and does not require lamination. It is widely used to make environmentally friendly clothing handbags, high-end shopping bags, etc. Commonly used white kraft paper with a thickness of 120g-200g, the paper has no brightness and glossiness, and white kraft paper is not suitable for printing content with too much ink.
Kraft paper: also known as natural kraft paper. It has high tensile strength and high toughness, usually brown-yellow, high tear resistance, rupture and dynamic strength, and is widely used in shopping bags, envelopes, etc. Commonly used natural kraft paper with a thickness of 120g-300g. Kraft paper is generally suitable for printing single-color or double-color and uncomplicated manuscripts. Compared with white cardboard, white kraft paper and coated paper, yellow kraft paper has the lowest price.
Gray-bottom white board paper: White board paper is a kind of paperboard with white and smooth front and gray back. The commonly used thickness is 250g-350g. White board paper is white on one side and gray on the other side. The price is relatively cheaper than white cardboard.
Black cardboard: It is a special paper with black on both sides. The characteristics of black cardboard are fine paper quality, black through the heart, firm and thick, good folding resistance, smooth surface, good stiffness, good tensile strength, high burst resistance, etc. Commonly used thicknesses are 120g-350g black cardboard. Because black cardboard is black inside and out, it cannot be printed with colored patterns. It is only suitable for hot stamping and silver stamping. The bags made are also very beautiful.
According to the bag edge, bottom and bottom sealing method, there are four types of paper bags: open seam bottom bag, open bonded corner bottom bag, valve stitched bag, valve flat hexagonal end bottom bonded bag.
According to the different handles and hole-digging methods: NKK (punching and stringing), NAK (no hole and string, divided into no fold and standard folding type), DCK (stringless bag body with hole handle), BBK (tongue-shaped but not punched).
According to different uses: including file bags, 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, wine bags. Different uses have many requirements for the designed specifications and sizes, including the thickness of paper bags, so they should be customized according to the actual situation to achieve twice the result with half the effort and economical and applicable purposes, providing more guarantees for material saving, green environmental protection, and corporate capital investment.
