How to correctly identify and use plastic food bags

2022-12-22 16:56:12 Rowling

How to correctly identify and use plastic food bags

The detection of plastic bags can use the following methods to detect toxic and non-toxic plastic bags.

Sensory detection method: non-toxic plastic bags are milky white, translucent, or colorless and transparent, flexible, smooth to the touch, and seem to have wax on the surface; toxic plastic bags are turbid or light yellow in color, sticky and astringent to the touch.

Water detection method: Put the plastic bag in the water and press it into the bottom. The non-toxic plastic bag has a small specific gravity and can surface, while the toxic plastic bag has a large specific gravity and sinks.

Fire detection method: non-toxic polyethylene plastic bags are flammable, the flame is blue, and the upper end is yellow, dripping like candle tears when burning, with paraffin smell and less smoke, toxic polyvinyl chloride plastic bags are not flammable, keep away from fire It goes out immediately, the flame is yellow, the bottom is green, it can be drawn when softened, and has a pungent smell of hydrochloric acid.

Smell test method: Plastic bags made of recycled materials have an unpleasant smell.

Shaking detection method: grab one end of the plastic bag with your hand and shake it vigorously, the one that makes a crisp sound is non-toxic; the one that makes a muffled sound is poisonous.

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Use of plastic bags

Although formally produced plastic food packaging is safe, care should be taken when using it, otherwise it will bring negative effects.

Do not use plastic bags for high-temperature food for a long time: In daily life, it is often seen that some people use plastic bags to pack steaming fried foods, such as fried cakes, fried dough sticks, etc., and some people put plastic bags on tableware for customers. use. Plastic bags are used to hold hot food that is directly ingested. When the temperature exceeds 50 °C, the plastic bag will release toxic gas. Long-term use of such food in plastic bags may cause dizziness, nausea, vomiting, diarrhea and other discomforts in mild cases. Can lead to lead poisoning and increase the probability of cancer.

Do not use ordinary plastic bags to heat in the microwave oven: use microwave ovens to heat food, it is best to use special plastic bags and special containers for microwave ovens.

Do not use ordinary plastic bags to store food in the refrigerator: use plastic wrap instead of ordinary plastic bags for refrigerated and frozen foods in the refrigerator. Due to the special process and raw materials of the fresh-keeping film, it has good air permeability and fresh-keeping performance, while ordinary plastic bags will cause food to deteriorate and rot quickly if used for a long time, and the purpose of fresh-keeping cannot be achieved

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Author Rowling


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