Structure and manufacturing method of kraft paper bag

13-12-2019

Kraft paper bag has high strength and high environmental protection, which is one of the most popular environmental protection packaging materials in the world. Kraft paper bags are widely used for shopping in supermarkets, shopping malls, shoe stores, clothing stores, etc., and they are well received by consumers. The structure and manufacturing method of kraft paper bags are explained below.


  Kraft paper bag structure


  Kraft paper bag is a kind of composite material or pure kraft paper packaging container. It is non-toxic, odorless, non-polluting, low-carbon and environmentally friendly, meets national environmental protection standards, has high strength and high environmental protection, and is currently one of the most popular environmentally friendly packaging materials in the world. One. Kraft paper bag is based on the whole wood pulp paper. The color is divided into white kraft paper and yellow kraft paper. PP film can be applied on the paper to play a waterproof role. The strength of the bag can be made from one to six layers according to customer requirements. , Printing and bag making integration. Opening and back cover methods are divided into heat seal, paper seal and paste bottom.

kraft paper bag

     Kraft paper bag manufacturing method


  Kraft paper bags are popular because of their environmental protection characteristics. Especially in European countries, almost all kraft paper bags are used. Then there are several ways of kraft paper bags.


  1. Small white kraft paper bags. Generally, these bags are large in quantity and widely used. Many merchants require this kind of kraft paper bags to be cheap and durable. Usually, the practice of this kraft paper bag is machine molding, and the machine is attached by rope. Machine operation.


  2. The practice of medium-sized kraft paper bags. Normally, medium-sized kraft paper bags are made of kraft paper bags made by machine after sticking synthetic type by hand. After the manual knitting of the rope, the domestic kraft paper bag forming equipment is limited by the size of the kraft paper. The bag sticking machine can only stick the ropes of smaller handbags, so the practice of kraft paper bags is limited by the machine. Many bags have no way to make the machine unique.


  3. Large bags, kraft paper bags with reverse heads, thick yellow kraft paper bags, these kraft paper bags are made by hand. At present, there is no machine in China that can solve these kraft paper bag forming. It can only be made by hand. The production cost of kraft paper bags is relatively high, and the quantity will not be very large.


  4. No matter which kind of kraft paper bag is used above, if the quantity is not large enough, it is usually made by hand. Because the machine makes kraft paper bags with large losses, there is no way to solve the problem of small number of kraft paper bags.


  The above is an introduction to the structure and manufacturing method of kraft paper bags. I hope everyone will understand the structure and manufacturing method of kraft paper bags, which will be helpful to everyone.


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