The packaging bags are popular in many sectors, because they are convenient and easy to carry. There are four materials they are made of: plastic, paper, metal, and glass, of which plastic bags represent the highest percentage of use. Vacuum sealed help keep the food fresh and in good condition. Then, what are the components in plastic bags?
The packaging bags are popular in many sectors, because they are convenient and easy to carry. There are four materials they are made of: plastic, paper, metal, and glass, of which plastic bags represent the highest percentage of use. Vacuum sealed help keep the food fresh and in good condition. Then, what are the components in plastic bags?
Plastic bags are made of natural or synthetic resin polymers. After mixing with several additives they become ductile at certain temperature and pressure, making it possible to fix a certain shape after cooling.
The molecular process of a natural resin polymer or in a melted state, ehn in contact with a uniform auxiliar dispersion molecule is called plastification. When the process comes to this stage it is called plastification, on the contrary there is no plastification.
Plastic bags are the second most used material for packaging, the volume of its use is only less than the paper and cardboard. Nonetheless, the vacuum sealed plastic packaging industry is growing at a 5% yearly rate, while that of other plastic materials, paper, cardboard, metal, glass, ceramic, linen and cotton only grows at a 2% rate.
