As long as the material of the bag contains a part of the paper, it can be collectively referred to as a paper bag.
Paper bag classification
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 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 230 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 high tensile strength, high toughness, usually brownish yellow, high tear strength, cracking and high dynamic strength. It is widely used in shopping bags, envelopes, etc. Commonly used thicknesses range from 120 grams to 300 grams of natural kraft paper. Kraft paper is generally suitable for printing monochrome or two-color and uncomplicated manuscripts. Compared to white cardboard and white paper carton coated paper, yellow kraft paper has the lowest price.
Whiteboard paper: Whiteboard paper is a kind of paperboard with white surface and smooth front and gray back. The thickness is usually 250g-350g. The whiteboard is white on one side and gray on the other. The price is relatively cheaper than white cardboard. 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. Because the black cardboard is black inside and outside, it can’t print colored patterns, only suitable for bronzing, hot silver and other processes. 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.
Environmental protection concept
Paper is a resource that can be recycled. The raw materials for papermaking are mainly plant fibers. In addition to the three main components of cellulose, hemicellulose and lignin, there are other components with less content, such as resin and ash. In addition, there are auxiliary components such as sodium sulfate. In addition to plant fibers, paper also needs to add different fillers according to different paper materials. The commonly used plastic bags made of polyethylene are made from petroleum, and oil is already a scarce source of energy. In contrast, paper bags are made from trees and are a renewable resource. The inherently degradable, recyclable features are naturally labeled with green labels.
Portable paper bags are more economical and cheaper than plastic bags. Because plastic bags can only be used once, the number of uses is extremely limited, and the paper bag can be used repeatedly for many times, and the paper bag is easier to print and the color expression is more vivid. It seems that the portable paper bag is more economical, and the effect of its promotion and promotion is more obvious.
The portable paper bag is tough, wear resistant and more durable. In addition to being strong and durable, the more advanced portable paper bags are also waterproof, handy and beautiful.
The color of the printed paper bag is more vivid, and the theme it expresses is clearer, and its solid and durable is simply a “mobile advertising bag”. The promotional effect brought by the company is much larger than that of the traditional plastic bag. The hand-held paper bag highlights the company’s atmosphere.
The portable paper bag is tough, wear-resistant and durable, and environmentally friendly, does not cause damage to the environment, and greatly reduces the pressure on the conversion of human waste. The environmental awareness of modern people is getting stronger and stronger, and the use of portable paper bags is only increasing, which is a good choice for people to shop.