Packing bags refer to bags used for packing various kinds of goods, so that the goods can be transported easily and easily stored in the process of production and circulation. It is widely used in daily life and industrial production. The actual figures show that 80 percent of the plastic bags used in the past are shipped to the landfill site and only 7 percent of the plastic is recycled.
According to the production process, it is often divided into plastic bag, composite packaging bag.
Classification of raw materials: high pressure polyethylene plastic bags, low pressure polyethylene plastic bags, polypropylene plastic bags, polyvinyl chloride plastic bags, etc.
Classification by appearance: vest bag, straight tube bag, stereo bag, square bottom bag. Seal pockets, rubber bags, bags, etc.
Plastic bags include plastic woven bags and plastic film bags. The former has the characteristics of light weight, high strength, corrosion resistance and so on. After adding plastic film lining, it can prevent moisture and moisture. The lightweight bag weighs less than 2.5kg and the medium size bag weighs 25-50kg and the heavy bag weighs 50-100kg. The latter light bags carry weight above 1kg; Medium bagged weight 1-10kg; Heavy bag load 10-30kg; The loading bag is more than 1000kg.
Properties of different materials together, to improve the permeability of packaging materials, moisture permeability, oil resistance, water resistance and drug resistance, make it play a insect-resistant, dustproof, microorganisms, light, sweet, smelly odor such as isolation, as well as heat, cold resistant, impact resistance, better mechanical strength and processing performance, and have good printing and decoration effect.
According to the form of packing: three sides seal, yin-yang bag, middle seal, pillow type bag, five-edge sealing bag, eight-side sealing bag, self-supporting bag, zipper bag, straw bag, coil, cover material, etc
According to function classification: high shade diaphragm bag, cooking film bag, antistatic film bag, antibacterial film bag, anti-mist film bag, vacuum bag, anti-chemical film bag, oxygen packing film bag, air conditioning bag, etc
According to the material classification: laser plating aluminum coated paper material, laser transfer paper materials, paper composite materials, aluminum composite materials, plastic composite materials, fabric composite materials, etc.
Composite soft packaging materials will eventually be made into a variety of packing bags. There are two ways to make a bag. One is to use the packaging to fill the automatic packaging machine with the roll film, and the packaging becomes a variety of packaging bags. The other is that the bag is made into various packaging bags and then reloaded into the contents. Due to the precision of professional bag control, the bag type is beautiful, the bag changes big, the bag type is much, so, in quite a number of cases, the bag is first made. The main varieties of bags are: three side sealing bags (sealed bag), back sealing bag, folding help (organ bag), upright bag, etc