These things are completely faded and nothing but a thin coating is used to prevent UV light from entering the food when it is packaged to prolong the freshness. Fill one with a lot of air; like a balloon with a little more helium than you then a bright light shines on one side; if you see the light, it will not stop the helium from coming out at all. Nylon LLDPE is used in party balloons.

Why do food vacuum packaging bags like nylon composite film? This is because nylon composite film as a packaging bag material has many advantages such as high tensile strength, good moisture resistance, low oxygen permeability, oil resistance, and high and low-temperature resistance.

For rice packaging bags, the main packaging functions are providing great puncturing capacity and resistance. Nylon and PE are the most widely used packaging film. If combined with nylon film they can also achieve a vacuum effect/environment.

It is very important for packaging of seasoning to keep the quality because the subtle difference of taste and flavor are value of commodities in itself. Firstly gas barrier, moisture barrier, flavor barrier are required in order to keep the quality because transportation and preservation term is long under normal temperature.

Retort pouches are flexible laminated structures that can withstand
temperatures associated with retort processing of products such as seafood, meats, rice, beans, sauces, prepared meals and pet food.

Nylon laminating films are ideal for applications that require unilateral lamination. The main purpose of these films is to provide packaged food with barrier properties.