The manufacture and application of kraft paper bag

Kraft paper bags are non-toxic, tasteless, pollution-free, in line with national environmental standards, with high strength, high environmental protection, is one of the most popular environmental protection packaging materials in the world. Kraft paper bags are more and more widely used in supermarkets, shopping malls, shoe stores, clothing stores and other places shopping, generally there will be kraft paper supplies, convenient for customers to carry the purchase of items. Kraft paper bag is a kind of environmental protection packaging bag, its variety.

Type 1: According to the material can be divided into: a. pure kraft paper bag; b. Paper aluminum composite kraft paper bag (kraft paper composite aluminum foil); c: woven bag composite kraft paper bag (generally large bag type)

2: According to the bag type can be divided into: a. three-side sealing kraft paper bag; b. side organ kraft paper bag; c. Self-supporting kraft paper bag; d. zipper kraft paper bag; e. Self-supporting zipper kraft paper bag

3: According to the appearance of the bag type, it can be divided into: a. valve pocket; b. Square bottom bag; c. Sew the bottom pocket; d. heat seal pocket; e. Heat sealed square bottom bag

Kraft paper bag is a kind of composite material or pure kraft paper making packaging container, non-toxic, tasteless, pollution-free, in line with the national environmental standards, with high strength, high environmental protection, is currently one of the most popular environmental protection packaging materials in the world.

Process description

Kraft paper bag is made of wood pulp paper as the base material, and the color is divided into white kraft paper and yellow kraft paper. It can be coated with a film of PP material on the paper, which plays a waterproof role. The strength of the bag can be made of one to six layers according to customer's requirements, which integrates printing and bag making. The opening and bottom sealing methods are divided into heat sealing, paper sealing and lake sealing.

Production method

Cowhide paper bag because of its environmental characteristics, by the people are optimistic, especially European countries are almost all using cowhide paper bag, so there are several ways to do it.

1, small white kraft paper bag, generally this kind of bag quantity, wide range of use, because many businesses require this kind of kraft paper bag cheap and durable, usually this kind of kraft paper bag practice is machine molding, machine stick rope, completely operated by the machine.

2, the practice of medium kraft paper bag, under normal circumstances, medium kraft paper bag is machine fitting forming after manual paste rope and made into a kraft paper bag, due to the current domestic kraft paper bag molding equipment is limited by the molding size, and kraft paper bag paste rope machine can only stick small handbag rope, so the practice of kraft paper bag is limited by the machine. Many bags cannot be made by machine alone.

3, the big bag, the reverse head of the kraft paper bag, thicker kraft paper bag, the practice of these kraft paper bags to pure handmade, at present there is no domestic can solve the kraft paper bag molding machine, can only be handmade, this kind of kraft paper bag production cost is high, the number will not be very large.

4, no matter what kind of kraft paper bag above, if the number is not large enough are generally made by hand, because the machine makes kraft paper bag loss, there is no way to solve the small number of kraft paper bag practice.

Performance parameter

Application type: single use

Shape: Flat pocket, square bottom open pocket, square bottom valve pocket, one word paste bottom bag (for food packaging)

Materials: polypropylene, kraft paper, aluminum foil

Filling capacity: 0.2kg-50kg

Sewing method: paper back cover, hot back cover, paste bottom.

Lining: inner lining paper, inner lining bag

Scope of application

Chemical raw materials, food, pharmaceutical additives, building materials, supermarket shopping, clothing and so on all applicable to the kraft paper bag packaging industry.