Paper handbags are mostly made of heavy kraft paper, white cardboard, white cardboard with grey background, white cardboard with white background and copper cardboard, which are printed, die-cut, bonded and formed by offset press. Due to the modernization of printing technology and equipment, printing patterns are exquisite, delicate and expressive. All modern printing processes can be displayed on a small handbag, such as hot stamping, concave and convex, UV, die-cutting profiles, etc.
Due to the difference of data, kraft paper has better stiffness and toughness, rough appearance, and with background color. It is not suitable for 4-color printing. It only does some monochrome printing, but also does not need to be coated on the surface. Its consumption cost is about 1.5 yuan (opposite). Careful attention should be paid to the use of good quality glue in the bonding process of kraft paper handbags, otherwise the phenomenon of bottom piercing and bursting will occur. At the same time, the kraft paper handbag will degum if it is placed too long. White cardboard, gray-based white cardboard, white-based white cardboard and copper cardboard have a common characteristic. They are all white in appearance and suitable for 4-color printing. They can print very delicate patterns. Owing to the toughness and water-repellency of the paper itself, they usually have to stop coating after printing (BOPP film, also known as biaxial stretching). Polypropylene film, called the paper-plastic composite bag, increases its toughness and water resistance. Handbags after stopping the Film-covering treatment generally do not show degumming. Its consumption cost is 1.3-2.0 yuan. Copper cardboard handbags have the highest cost, followed by white cardboard handbags, grey-bottomed white cardboard handbags and white-bottomed white cardboard handbags.
Plastic bags are classified into ordinary plastic bags and degradable plastic bags according to the information used. The thickness of plastic shopping bags provided by ordinary farmer's market is about 0.005 mm, and the thickness of plastic shopping bags provided by large supermarkets and shopping malls is between 0.015 mm and 0.020 mm. At present, more than 80% of the plastic shopping bags in the market can not reach the national plastic limit of 0.025 mm or more. After plastic restriction, plastic shopping bags are paid for in supermarkets and shopping malls, and degradable plastic bags are also used in shopping malls.
Cloth bags can be classified into textile and non-woven fabrics according to whether textiles are needed or not. Textile fabrics are divided into vegetable and chemical fibre fabrics and blended fabrics; nonwoven fabrics are usually called nonwoven fabrics, which are directly made of polymer chips, short fibers or filaments, which are netted by air or machine, then reinforced by spunlaces, needling or hot rolling, and finally finished. The non-woven fabric has the advantages of soft and breathable new fiber products. It does not produce fibre chips, strength, durability and silky softness. It also has the feeling of cotton. Compared with cotton fabric, non-woven bags are easy to form and cheap in cost.
Textile bags are mostly made of cotton, canvas, polyester, cotton and Oxford fabrics. These fabrics are rough in appearance and can not be printed directly and precisely. They are mostly screen printing or transfer printing. At the same time, because of the high price of raw materials, the consumption of handbags is also more expensive.
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