Among many packaging materials, paper is light and soft, with wide sources of raw materials, low cost, various varieties, extremely convenient processing, economic and practical, suitable for mechanized mass production. According to the function, it can be divided into ordinary wrapping paper, special wrapping paper printing, food wrapping paper, commodity printing wrapping paper, etc. Packaging box commonly used paper: kraft paper, corrugated paper, white card paper, grey card paper, box board, special paper, candy paper, etc.
(I) Printing of kraft paper packing box:
Is a tough, water resistant wrapping paper with high tearing strength. Usually yellowish brown or brownish yellow in color, it is widely used. Can be divided into packaging kraft paper, waterproof kraft paper, moisture-proof kraft paper, rust proof kraft paper, molding kraft paper, craft kraft paper, insulating kraft paper board, kraft paper, etc. It is often used in the manufacture of cardboard boxes, paper bags, envelopes, record sleeves, folders, etc. Toughness and water resistance are important characteristics of kraft paper. Semi-bleached or fully bleached kraft pulp is light brown, cream or white. Raw kraft paper can be bleached in different shades of gray and even white, all suitable for making large packing paper bags for mass shipments. Kraft paper generally has two to seven layers. In special cases, plastic and metal foil can be processed into its bags due to the need for moisture resistance. This composite structure of large packaging bags is particularly strong, Qingdao printing is often used to carry construction cement, chemical products and grain and feed, etc. Refined kraft paper is an improved product of ordinary kraft paper. It has the characteristics of bright color, clean appearance, high smoothness, good strength and good printing effect on refined kraft paper. Better envelopes and information bags are now made of brown paper.
(2) Corrugated carton printing and packaging:
During World War II, cartons made up 80 percent of shipping containers. The corrugated carton of our country started relatively late until 1954 became popular and used. As a kind of transportation packaging, corrugated box has the characteristics of low cost, light weight, easy processing, high strength, easy to recycle and so on. Corrugated paper is made of corrugated paper and corrugated paper by processing corrugated board. It is generally divided into two kinds: single corrugated board and double corrugated board. Corrugated paper is processed into corrugated paper by bonding.
(3) Design and printing of white card carton:
White card paper is a kind of thick and strong white card paper made of pure high quality wood pulp. It is a single or multilayer paper made entirely from bleached chemical pulp and fully sizing. Generally divided into: blue and white single-side and double-sided coated board, white coated board and gray coated board. The texture of white card paper is hard, thin and brittle, the color purity of the surface of the paper is relatively high, it has a relatively uniform ink absorption, good folding resistance, has a wide range of uses, such as the production of a variety of high-grade packaging boxes. The characteristics of this kind of board are: high flatness, good stiffness, clean appearance, good flatness, suitable for printing and product packaging. There are three grades of A, B, and C. Generally there are 200g, 250g, 280g, 300g, 350g, 400g of white card paper. Different grams of white card paper have different functions.
(4) Grey board:
Often used in packaging boxes, because of its back gray, so commonly known as gray cardstock. This kind of board is suitable for cartons printed on one side. The density is much lower than white card paper. It is also often used to mount pitted paper to make what is known as cardboard. Boxes that do this protect the product more.
(5) Cardboard box board
Also known as hemp card paper, is a kind of relatively strong cardboard, specially used for the production of outer packaging cartons. The surface is smooth, the color is light yellow or light brown, with high mechanical strength, folding resistance and bursting resistance. Qingdao carton printing is divided into ordinary type and advanced type. Ordinary chemical unbleached grass pulp as raw material, high-grade wood pulp is brown ground wood pulp, sulfate wood pulp, cotton pulp or hemp pulp. Container plates are widely used.
(6) Special paper:
Generally refers to good quality, high price, special purpose, relatively small production of paper. There are many kinds of special paper, which is the general name of various special purpose paper or art paper, but now art paper such as embossage paper is collectively referred to as special paper. Due to the wide range of special paper applications, high performance and added value, but the domestic productivity is low.
(7) Candy packaging
It is a kind of paper which is widely used in packaging. It is a thin paper used to wrap candy after printing packaging patterns and waxing. It has good water resistance and air tightness. In addition to candy packaging, also used for bread and other food moisture-proof packaging.
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Post time: Apr-03-2023
Post time: 2023-04-27 09:50:55