The composite flexible packaging materials can be used only when they are finally made into various packaging bags. There are two ways to make bags, one is that the packaging manufacturers use the roll film in the automatic packaging machine filling, and molding packaging into a variety of bags; The other is due to the bag-making mechanism into various bags and then fill the contents. Due to the precise control of professional bag making, beautiful bag shape, large bag making changes, and many bag types, therefore, in quite a few cases, bags are made first. The main varieties of bags are: three-side sealing bag (palm sealing bag), back sealing bag, folding tip (organ bag), upright bag and so on.
A variety of materials with different characteristics are combined together to improve the permeability, moisture permeability, oil resistance, water resistance, drug resistance of the packaging material, so that it can play insect proof, dust proof, anti-microbial, light, incense, odor and other odor isolation, as well as heat resistance, cold resistance, impact resistance has better mechanical strength and processing performance, and has good printing and decorative effects.
According to the form of packaging classification: three-side seal, Yin and Yang bag, middle seal, pillow type bag, five-side seal bag, self-standing bag, zipper bag, straw bag, coil, cover material, etc
Classification according to function: high negative diaphragm bag, cooking film bag, antistatic film bag, antibacterial film bag, anti-fog film bag, vacuum bag, anti-chemical film bag, deoxygenated packaging film bag, air conditioning packaging film bag, etc
According to the material classification: laser aluminum-coated paper material, laser transfer paper material, paper composite material, aluminum composite material, plastic composite material, fabric composite material and so on.
Classification by appearance: vest bag, straight bag, three-dimensional bag, square bottom bag. Sealing pocket, tape bag, shaped bag, etc.
Plastic bags include plastic woven bags and plastic film bags. The former has the characteristics of light weight, high strength, corrosion resistance, etc. After adding plastic film lining, it can be moisture-proof and moisture-proof; The light bag load is less than 2.5kg, the medium bag load is 25-50kg, and the heavy bag load is 50-100kg. The latter's light bag load is more than 1kg; Medium bag load 1-10kg; Heavy bag load 10-30kg; The container load is more than 1000kg. Valve port packing bag.
