Which packaging is unsafe?
release time:
2021-07-06 14:19
"Good packaging equals safety", this is a conclusion recognized by many consumers. But in the eyes of experts, it is far from the case. The hidden dangers of food packaging often appear in unexpected places.
The color is bright, and the ink is a hidden danger. Bright colors mean using more ink, which will increase the chance of heavy metals and solvents in the ink to migrate into and out of the packaging bag. Once harmful substances invade the contents of the package, it will inevitably cause great safety problems.
Putting toys in snacks is dangerous. In order to attract children to buy, more and more snacks now come with small toys. Most of these small toys are packed in a thin plastic bag and mixed with snacks. This can easily cause the plastic bag containing the toy to react with the grease of the snack to precipitate harmful substances. If the plastic bag breaks, the plastic toy will also contaminate the snack.
Plastics cannot be used for hot or greasy food. Nowadays, people use many plastic bags. Some such as polyethylene and polypropylene are safe plastics that can be used to hold food. However, most of the film plastic bags used in restaurants and early morning stalls are made of polyvinyl chloride, which cannot hold food. Become. Using them to fill fried dough sticks, hot pasta, etc., which have just been out of the pot, may cause harmful substances to ooze out, which may cause chronic poisoning over time. If it is a substandard plastic bag, there will still be problems such as decolorization, which will also become a carcinogenic hazard.
It is also best not to use plastic wrap, which is also a plastic product, to directly package meat, cooked food, and oily food or to heat it. In Canada, all plastic packaging used for food must indicate the maximum temperature that can be reached.
In addition, excessive packaging may greatly increase pollution. Today's food, as long as it can be given out as a gift, it will inevitably be matched with complex and exquisite packaging, and it will not be stingy with layer after layer of packaging materials of various materials. This will not only directly affect the price of goods, but also may seriously endanger human health. For example, moon cake trays made of polyvinyl chloride contain a lot of toxic and harmful substances. Moon cakes contain a lot of oil, and these toxic and harmful substances will migrate to the moon cakes when dissolved in the oil, which will cause harm to human health.
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Use plastic food packaging with caution
On August 30, the provincial health supervision agency recently discovered in a special inspection of food packaging materials in the province that the food production and business unit cannot explain the manufacturer of plastic bags for food, nor can it provide corresponding inspection reports. Food packaging products contain food. Pollution hazards. The health supervision department issued the No. 12 Early Warning Announcement today, requiring consumers to use safe and hygienic food packaging products. At present, some illegal vendors in the society use non-food raw materials (such as industrial raw materials) to produce, or use Inferior plastic bags made of recycled waste plastics have low transparency, poor elasticity, and some have a pungent odor. This type of product contains a variety of chemical substances that are harmful to the human body. If the oily food is contained, the harmful substances will dissolve in the grease, causing pollution to the food and endangering human health; the plasticizer is harmful to the human body after dissolution, and may have carcinogenic effects ; Components such as heavy metal lead will accumulate in the human body and affect human health. The health supervision agency requires catering units and supermarkets to strictly follow the "Food Sanitation Law" and related regulations to do a good job in obtaining certificates for food packaging products, and not to buy plastic products for food without conformity inspection reports; street food stalls and vendors are not allowed to buy Use plastic bags that do not meet hygienic requirements.
Plastic tableware purchase identification
When purchasing plastic tableware, it is first necessary to see if the logo is complete, and then look at the product.
Stalls use non-food grade plastic bags Yangcheng Evening News reporter's investigation found that on the streets of Guangzhou, many supper stalls and food stalls directly use plastic bags to cover bowls for food. If some customers ask to be taken away, the owner will also use plastic bags. At the Guangzhou Nantian International Hotel Supplies Wholesale Market, the reporter saw that there are many kinds of plastic bags with different prices. The price of plastic bags with food special marks and plastic bags without food special marks is two to five times different. In a wholesale store, a white plastic bag does not have any text signs, and the price is 4 yuan per bundle (100 pieces). Merchants said that in order to reduce costs, this plastic bag is very popular with various small food stalls. experiment Fire to identify whether plastic bags are poisonous Can the food in plastic bags be eaten safely? In this regard, a reporter from the Yangcheng Evening News bought several ordinary plastic bags (PVC polyvinyl chloride) and food-grade plastic bags (PE polyethylene), and sent them to Guangzhou every week for food and drug safety inspections. The institute conducts tests. The researchers conducted two sets of tests using the fire detection method and the high oil temperature hot melt performance detection method. Fire detection method: In a special laboratory cabinet, the researchers lit PE plastic bags and PVC plastic bags respectively. The former burned quickly after being ignited, and the flame was yellow. When it burned, it was like a candle with melt dripping on the ground; the latter flame It is yellow-green, flame-retardant and non-flammable. High oil temperature hot melt performance detection method: PVC plastic bags begin to deform when the oil temperature reaches 90℃, and their components will melt as the oil temperature rises; when the oil temperature exceeds 100℃, PE plastic bags will also slow down Slowly begin to soften and deform, and melt and melt as the oil temperature rises. The staff said that general consumers can judge whether plastic bags are poisonous by hand: non-toxic plastic bags are milky white or colorless and transparent, and feel lubricious when touched; toxic plastic bags are cloudy or light yellow in color, and feel sticky. remind Use plastic bags carefully for food Zhu Yi, an associate professor at the School of Food Science and Nutritional Engineering, China Agricultural University, told the Yangcheng Evening News reporter that food-grade plastic bags are relatively safe to contain food. But if it encounters high temperature and high oil, the heavy metals, plasticizers and some unstable substances in the plastic bag will dissolve into the food and cause harm to the human body. She suggested that plastic bags should be used sparingly or with caution.
Inventory of common food grade plastics
Common food grade plastics include PET plastic, PP plastic, HDPE plastic, LDPE plastic, PS plastic, PC plastic and so on. 1. PET plastic: It is often used to make plastic boxes, beverage bottles and other products. The transparent fruit boxes and cake boxes that people often buy are packaging products made of PET sheets, which are food-grade safe plastic materials. 2. PP plastic: PP is one of the common plastics, which can be made into any food plastic packaging, such as food special plastic bags, food plastic boxes, food straws, etc. It is safe and non-toxic, and has good low temperature and high temperature resistance. PP is the only plastic that can be heated in a microwave oven and has high strength and flexural resistance. It will not be damaged when dropped from a height of 50,000 times at -20°C. Food grade PP sheets are often used for quick-frozen dumplings and microwave-heated food packaging. 3. HDPE plastic: commonly known as high-density polyethylene, it has higher service temperature, hardness, mechanical strength and good chemical resistance. It is a non-toxic and safe material and is often used in the production of plastic containers for food. 4. LDPE plastic: commonly known as low-density polyethylene, products made from it have the characteristics of odorless, odorless, non-toxic, and matt surface. Commonly used in food plastic parts, food packaging composite film, food preservation film, medicine, pharmaceutical plastic packaging, etc. 5. PS plastic: commonly used to make bowls of instant noodle boxes, fast food boxes, disposable food packaging boxes, etc., with good cold resistance. Food-grade PS sheets are often used in containers such as yogurt cups. 6. PC plastic: It can be used to make sports water cups, bottles, etc., and is widely used in the production of plastic containers.
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