In our daily work and life, as long as you pay a little attention, you will find that we often use or see kraft paper bags. For example, when buying food, kraft paper bags are often used for packaging. The most impressive thing about them is that they have better toughness and are non-stick. Oil, so what are the characteristics of brown paper bags? Let’s find out for you below!
The main materials of paper bags include four special papers: white card, kraft leather, black card and copper paper. As the name suggests, kraft paper bags are made of kraft paper. It has very high solidity and toughness and is not easy to tear. , kraft paper is very suitable for printing single-color or two-color paper bags that are not very colorful. The weight of commonly used kraft paper is about 157 grams to 300 grams.
In application, kraft paper bags can be divided into heat sealing, paper sealing and paste bottom according to the opening and back sealing methods. The application scope involves many industries, such as: chemical raw materials, food, pharmaceutical additives, building materials, supermarket shopping, clothing, etc. In the kraft paper bag packaging industry. The colors are divided into white kraft paper and yellow kraft paper. A layer of PP material can be used to coat the paper to provide waterproofing. The strength of the bag can be made into one to six layers according to the customer’s requirements. Printing and bag making are integrated.
Kraft paper bags can be classified in more detail mainly from three aspects: material, bag type and appearance, as follows:
01.According to material
According to the material, kraft paper bags can be divided into: ① pure kraft paper bags, ② paper-aluminum composite kraft paper bags (kraft paper composite aluminum foil), ③ woven bag composite kraft paper bags (generally larger bags).
02.According to bag type
According to the bag type, kraft paper bags can be divided into: ① three-side seal kraft paper bag, ② side accordion kraft paper bag, ③ self-standing kraft paper bag, ④ zipper kraft paper bag, ⑤ self-standing zipper kraft paper bag.
03.According to appearance
Kraft paper bags can be divided into: ①valve bags, ②square bottom bags, ③sewn bottom bags, ④heat-sealed bags, and ⑤heat-sealed square bottom bags according to the bag appearance.
In short, kraft paper bags are made of whole wood pulp paper as the base material, and are made of a composite material or pure kraft paper as packaging containers. They are non-toxic, tasteless, pollution-free, low-carbon and environmentally friendly, comply with national environmental protection standards, and have high strength and high environmental protection. , is currently one of the most popular environmentally friendly packaging materials in the world.
Post time: Nov-20-2023