Up to now, self-supporting bags are basically divided into the following five types:

1. Ordinary self-supporting bag:
And general form of self-supporting bag, adopting four edge forms, cannot be closed and repeated open, this kind of self-supporting bag is commonly used in the industrial goods industry.

2. Self-supporting bag with suction nozzle:
The self-supporting bag with suction nozzle is more convenient to dump or absorb the contents. Meanwhile, it can be re-opened and re-opened, which can be considered as the combination of self-supporting bag and ordinary bottle mouth. The self-supporting bag generally used in commodity packaging, used for holding drinks, shower gel, shampoo, tomato sauce, cooking oil, jelly and other liquids, gels, semi-solid products, such as the famous pleased lang CiCi.

3. Self-supporting bag with zipper:
Zippered self-supporting bag can be opened and closed again and repeat same form with the zipper does not close and close strength is limited, so this kind of form is not suitable for packaging liquid and volatile substances. In different ways according to sealing side is divided into four edges and three sealing side two, four sealing side, is the point at which the product packaging in the factory have a layer of ordinary zipper sealing side, the common when using using tear sealing side, recycle zipper implementation repeat rev, this method has solved the small zipper sealing side strength against the shortcoming of transportation. The three edges are sealed with a zipper seal, which is usually used for the light quality products. The self-supporting bag with zipper is usually used to pack some light solid, such as candy, biscuit, jelly, etc., but the self-supporting bag of four edges can also be used for packaging rice, cat sand and other heavy products.

4. Self-supporting bag:
The mouth - like self - supporting bag combines the convenience of the self-supporting bag with the suction nozzle and the cheapness of the ordinary self-supporting bag. The function of the suction nozzle is realized through the shape of the bag body itself. However, the self-supporting bag can not be resealed. Therefore, it is generally used in the packaging of liquid, colloid and semi-solid products used in drinks and jellies.

5. Alien self-supporting bag:
That is, according to the packaging needs, on the basis of the traditional bag type, the various shapes of the new self-supporting bags, such as the waist design, the bottom deformation design, the handle design, etc. It is the main direction of the development of self-supporting bags.

Along with the social progress and the improvement of people's aesthetic standard and the intensity of competition in various industries, the design of the self-supporting bag printing is becoming more and more rich and colorful, the form more and more, the development of the alien self-supporting bag has a tendency to gradually replace traditional self-supporting bag status.