There are many varieties of paper bags, various materials and styles of paper.
According to the material, it can be divided into: white cardboard paper bag, white paper paper bag, copper paper paper bag, kraft paper bag, and a few are made of special paper.
White cardboard: White cardboard is strong and thick, with high stiffness, burst resistance and smoothness. The paper surface is flat. The commonly used thickness is 210-300 grams of white cardboard. The most used is 230 white cardboard. The paper bag printed with white cardboard is full of color and the texture of the paper is very good, which is your first choice for customization.
Coated paper: coated paper is characterized by very smooth and flat paper surface, high whiteness, high smoothness, good gloss, and also makes the printed graphics and pictures have a three-dimensional effect. The commonly used thickness is 128 grams-300 grams, coated paper The printing effect is the same as that of white cardboard, and the color is full and bright. Compared with white cardboard, the stiffness is not as good as white cardboard.
White kraft paper: White kraft paper has high resistance to breakage, good toughness, high strength, and uniform thickness and color stability. According to the relevant national regulations, supermarkets are restricted to use plastic bags, and foreign, European and American countries advocate the trend of using environmentally friendly paper bags, and strictly control plastic Pollution, plastic bags will be replaced by environmentally friendly paper bags, white kraft paper market prospects are promising. Made of 100% pure wood pulp, environmentally friendly and non-toxic, environmentally friendly and recyclable, white kraft paper has good toughness, and does not require coating. It is widely used to make environmentally-friendly clothing bags, high-end shopping bags, etc. The commonly used thickness is 120 grams-200 grams of white kraft paper. The paper does not have brightness and gloss. White kraft paper is not suitable for printing inks with too much content.
Kraft paper: Also known as natural kraft paper. Has high tensile strength, high toughness, usually brownish yellow, high tear resistance, cracking and dynamic strength, widely used in shopping bags, envelopes, etc. Common thickness is 120 grams-300 grams of natural kraft paper. Kraft paper is generally suitable for printing single-color or two-color and uncomplicated manuscripts. Compared to white cardboard and white kraft paper coated paper, yellow kraft paper has the lowest price.
Gray-backed whiteboard: Whiteboard is a kind of white and smooth paperboard on the front, mostly gray-backed on the back. The commonly used thickness is 250g-350g. Whiteboard is white on one side and gray on the other. The price is relatively cheaper than white cardboard. a little.
Black cardboard: It is a special paper with double-sided black. Black cardboard is characterized by exquisite paper, black through the heart, strong and thick, good folding resistance, smooth and smooth surface, good stiffness, good tensile strength, and high resistance to breakage. Common thicknesses are from 120 grams to 350 grams of black cardboard. Because the black cardboard is black inside and outside, it is not possible to print colored patterns, only suitable for gold foil, silver foil and other processes. The bag made is also very beautiful.
According to the bag edge, bottom and back cover methods: there are four types of paper bags: open seam bottom bag, open bonded corner bottom bag, valve stitching bag, valve flat hexagonal end bottom adhesive bag and so on.
According to the different handles and digging methods: NKK (hole punching and stringing), NAK (no hole and rope, divided into no fold and standard fold type), DCK (cordless bag body digging handle), BBK (with Tongue is not punched).
According to the different uses: including portfolio bags, envelopes, tote bags, cement bags, feed bags, waxed 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 designed size and specifications, including the thickness of the paper bag paper, have many requirements, so we need to customize according to the actual situation, to achieve twice the result with half the effort, economical and applicable purposes, to reduce material savings, green environmental protection, corporate capital investment, provide More protection