Views: 298 Author: Site Editor Publish Time: 2020-02-14 Origin: Site
As long as the bag material contains a part of the paper can be collectively referred to as paper bags.
There are many kinds of paper packaging bags, paper packaging materials and styles.
(1) According to Different Materials
According to the material it 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.
(a) White Cardboard
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.
(b) Copper Sheet
Copperplate paper is characterized by a very smooth surface, high whiteness, smoothness and glossiness. Copperplate paper can make the printed figure and picture have three-dimensional sense. The thickness of common copper board paper is 128-300 G. The effect of copperplate printing is the same as that of white cardboard, and the color is full and bright. Compared with white cardboard, the stiffness of copper paper is lower than that of white cardboard.
(c) White Kraft Paper
White kraft paper has the advantages of high breaking resistance, good toughness, high strength and stable color image. White kraft paper is made of 100% pure wood pulp, which is environmentally friendly, non-toxic and recyclable. White kraft paper has good toughness and does not need to be coated. White kraft paper is widely used to make environmental protection clothing handbags, high-grade shopping bags and so on. The commonly used thickness of white kraft paper is 120g-200g. But the white kraft paper has no brightness and glossiness. It is not suitable for printing ink too large content.
(d) Kraft Paper
Kraft paper is also called natural kraft paper. Kraft paper has a high tensile force, high toughness, usually brown yellow. Its tear strength, rupture and dynamic strength are very high. Kraft paper is widely used in shopping bags, envelopes, etc. The commonly used kraft paper thickness is 120g-300g. 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.
(e) White Board Paper with Grey Background
White board is a kind of board with white and smooth front and gray back. The thickness of the commonly used white board paper on the gray base is 250g-350g. The white board paper is white on one side and gray on the other. The price is a little cheaper than the white card paper.
(f) Black Paper Jam
Black card paper is a kind of special paper, both sides of which are black. Black card paper is strong and thick, with good folding resistance, flat and smooth surface, good stiffness, good tensile force and high bursting resistance. The thickness of commonly used black card paper is 120g-350g. Because the inside and outside of black cardboard are black, so it can not print color patterns, only suitable for stamping, silver and other processes.
(2) Different Bag Edge, Bottom and Back Cover Methods
It can be divided into four types of paper bags: open seam bottom bag, open seam corner bottom bag, valve seam bag, valve flat hexagonal end bottom adhesive bag.
(3) According to the Handle and Hole Digging Methods
It is divided into 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 (no punching with tongue mouth).
(4) According to Different Purposes
It includes file bag, envelope, handbag, packaging bag, cement bag, feed bag, wax paper bag, fertilizer bag, laminating paper bag, medicine bag, clothing bag, food bag, shopping bag, gift bag and wine bag. There are many requirements for the designed specifications and sizes, including the thickness of the paper bag, so we need to customize them according to the actual situation. This provides more guarantee for material reduction, environmental protection and enterprise capital investment.
As we all know, paper is a kind of recyclable resource. The raw material of papermaking is mainly plant fiber. In addition to cellulose, hemicellulose and lignin, there are other components with less content, such as resin and ash. In addition, there are auxiliary ingredients such as sodium sulfate. In addition to plant fiber, different fillers need to be added according to different paper materials. The plastic bags usually made of polyethylene are made of petroleum, which is our energy shortage. In contrast, paper bags are made from trees, which are renewable resources. Its degradable and recyclable characteristics are naturally pasted with green label.
Packaging bag used paper as packaging material can help us better protect the environment!