Paper bag classification
Paper bag classification
As long as the bag material contains a part of the paper can be collectively referred to as paper bags.
Features environmental protection, durable and beautiful
The material of the sorting bag contains part of the paper
Main material paper
There are many kinds of paper bags, paper materials and styles.
According to the material can be divided into: white cardboard paper bags, white paper bags, copper paper bags, kraft paper bags, and a small number of special paper manufacturing.
White card paper: the white card paper is firm and thick, with high stiffness, bursting resistance and smoothness. The paper surface is flat. The commonly used thickness is 210-300g white card paper, and the most used one is 230 white card. The paper bag printed with white cardboard has full color and excellent texture, which is your first choice.
Copperplate paper: copperplate paper is characterized by very smooth and smooth surface, high whiteness, high smoothness and good glossiness. It also makes the printed graphics and pictures have a three-dimensional sense. The commonly used thickness is 128g-300g. The printing effect of copperplate paper is the same as that of white cardboard. The color is full and bright. Compared with white cardboard, its stiffness is lower than that of white cardboard.
White kraft paper: white kraft paper has high breaking resistance, good toughness, high strength, uniform thickness and stable color image. 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 environmental paper bags, strictly control the plastic pollution, plastic bags will be replaced by environmental paper bags, and the market prospect of white kraft paper is promising. It is made of 100% pure wood pulp, environmental friendly and non-toxic, environmental friendly and recyclable. White kraft paper has good toughness and does not need to be covered with film. It is widely used to make environmental friendly clothing handbags, high-grade shopping bags, etc. The commonly used thickness of white kraft paper is 120g-200g. The paper does not have brightness and glossiness. White kraft paper is not suitable for printing with too large ink content.
Kraft paper: also known as natural kraft paper. It has high tensile strength, high toughness, usually brownish yellow, high tear strength, rupture and dynamic strength, and is widely used in shopping bags, envelopes, etc. The commonly used thickness is 120-300 grams of natural brown paper. Kraft paper is generally suitable for printing single color or double color and color is not complex manuscript. The price of kraft paper is the lowest compared with white cardboard and white kraft paper.
White board paper with gray background: white board paper is a kind of board with white and smooth front and gray background back. The commonly used thickness is 250g-350g. White board paper is white on one side and gray on the other. The price is cheaper than white card paper.
Black card: a special paper, double-sided black. Black card paper is characterized by fine paper, through heart black, strong and thick, good folding resistance, flat and smooth surface, good stiffness, good tension, high bursting resistance. The commonly used thickness is 120g-350g black cardboard. Because the inside and outside of black cardboard are black, so can not print color patterns, only suitable for stamping, silver and other processes. The bag is also very beautiful.
According to the bag edge, bottom and sealing method, there are four types of paper bags: open seam bottom bag, open seam corner bottom bag, valve seam bag, valve flat hexagon end bottom adhesive bag.
According to the different handle and hole digging methods: NKK (drilling through rope), NAK (no hole with rope, divided into no mouth fold and standard mouth fold), dCK (no rope bag body hole digging handle), BBK (with tongue mouth without hole punching).
According to different uses: including file bag, envelope, handbag, cement bag, feed bag, wax paper bag, fertilizer bag, laminating paper bag, four layer paper bag, medicine bag, clothing bag, food bag, shopping bag, gift bag, wine bag. There are many requirements for the designed specifications and sizes, including the thickness of paper bags. Therefore, it is necessary to customize according to the actual situation, so as to achieve the purpose of twice the result with half the effort and economic applicability, which provides more guarantee for material reduction, environmental protection and enterprise capital investment