Four ways to identify food packaging bags

Food packaging bag identification When buying food packaging bags, how do we check and the quality is the easiest way, here the Chinese food packaging bag manufacturers will also analyze with you, through “eyes”, found that the packaging bags are turbid Unclear, colored and unevenly distributed; “smell” peculiar smells and odors; “hands” feel greasy when touched, and can be easily stretched or torn by tearing. Most of these plastic packaging bags are made of recycled materials , should be used with caution. In addition, we need to be careful not to easily use commodity retail packaging bags for packaging or holding high-temperature cooked food and greasy food, especially these foods should not be stored for a long time, because under such conditions, more substances may migrate in the plastic packaging bags. Into the food, it brings a safety hazard to health. Consumers should pay attention to the difference when using hand-held plastic bags, the color is heavy, and it is generally not suitable for food packaging. There is no doubt that the invention of food packaging bags brings convenience to people. From small food packaging bags to various fruit and vegetable packaging bags, the use of packaging bags is inseparable. However, in order to reduce costs, many unscrupulous traders in the market produce and sell unqualified packaging bags with harmful substances. The use of these bags brings harm to people’s health. How can we better identify inferior food packaging bags? Here are 4 great tricks for you: 1. Identification by hand: Grab one end of the packaging bag with your hand and shake it hard, and those with a crisp sound are non-toxic; those with a dull sound are poisonous. You can also rub the packaging bag between your hands. It feels smooth and does not break. It is a non-toxic polyethylene packaging bag; if it is inelastic and easy to break, it is a toxic polyvinyl chloride packaging bag. Smell with the nose: smell the odor, the polyethylene packaging bag is odorless, and the polyvinyl chloride packaging bag has a strong pungent odor. Use water in daily life: put the packaging bag in the water and press it into the bottom of the water. The non-toxic plastic bag has a small specific gravity and can float to the surface, while the toxic plastic bag has a large specific gravity and sinks. Fire identification: non-toxic polyethylene food packaging bags are flammable, the flame is blue, and the upper end is yellow, dripping like candle tears when burning, with paraffin smell, less smoke; toxic polyvinyl chloride packaging bags are not flammable, keep away from fire That is, the flame is yellow, the bottom is green, softening can be drawn, and there is a pungent odor of hydrochloric acid. Reject inferior packaging, environmentally friendly green food packaging bags, start from our side, and give the plastic flexible packaging industry a better future