Are the plastic bowls in the canteen poisonous?

Are the plastic bowls in the canteen poisonous? As the pace of life becomes faster and faster, people will do everything for convenience. Disposable plastic bowl packaging can be seen everywhere in daily life. Disposable plastic bowls are a necessity of our lives. But some people will ask whether the plastic bowls in the canteen are poisonous? Are plastic bowls in canteens toxic? 1

1. Are disposable plastic bowls safe? 1. Disposable plastic bowls contain a lot of harmful substances, such as plasticizers, etc. When After the tableware exceeds the heat resistance limit, the disposable plastic bowl releases plasticizer, which can damage the human liver and kidneys, affect the endocrine system, etc.

2. In addition to the release of plasticizers from plastic bowls caused by high temperatures, dissolved organic matter may also cause disposable plastic bowls to release harmful substances. For example, when cooking, we often use cooking wine, vinegar and other seasonings, and vinegar and cooking wine will produce ethyl acetate. This organic matter will destroy the benzene ring of the polymer material in the disposable plastic bowl, making the plastic substances are transferred into food.

3. According to the inspection results of the Quality Supervision Bureau, the qualification rate of disposable plastic bowls and other products is less than 70%. Its safety hazards are relatively large. Some pure plastic tableware is not safe. It is relatively safe, but inferior disposable plastic bowls can cause the dissolved residue to exceed the standard, causing symptoms such as indigestion and even heavy metal poisoning.

2. How to choose plastic products

Generally, plastic products will have markings 1-6 on the bottom. We need to pay attention to the markings when purchasing plastic products. For example, the plastic product labeled 05 is made of PP material. It can withstand high temperatures of 130 degrees and is the only food that can be heated in a microwave oven. However, its transparency is relatively poor. Plastic products marked 06 are made of PS material. They cannot be placed in a microwave oven, nor can they contain strong acids or alkaline substances.

When we buy plastic products, we can smell the products to see if they have any peculiar smell. Generally, qualified products have no smell.

When purchasing plastic products, we need to check whether the product information is complete, whether the plastic product has a food mark, and whether the plastic product is clean and free of impurities.

If we buy plastic toys, we need to check whether the product has 3C certification, and try to choose toys with relatively thick width and corners. Usually high-quality plastic toys are made of PVC, PP, PE, etc. Made of high-quality materials, its color is relatively bright. Are plastic bowls in canteens toxic? 2

Plastic products can be divided into three categories according to their composition: one type is made of polyethylene, polypropylene and dense ammonia as raw materials, which is non-toxic and harmless to the human body; The other type is polyester. Research by the United States Aerospace and Space Administration found that this is the chemical substance that is most likely to release harmful gases among all compounds. PVC, etc., have been confirmed to be carcinogens; the third type is polycarbonate. ready-made utensils or bottles.

When these tableware are used to hold hot water and oil, phenol methane will be released. After the human body absorbs it, it will cause endocrine disruption. Metal elements such as lead and cadmium in the surface patterns of many plastic tableware can cause harm to the human body. Generally, there is a protective film on the surface of plastic products. Once this film is scratched, harmful substances will be released.

Therefore, consumers should try to choose plastic tableware with no decorative patterns, colorless and odorless, smooth surface and strong feel. Consumers can choose plastic products marked with PE (polyethylene) and PP (polypropylene) on the products, which are safer. Experts believe that plastic wrap, wallpaper, water pipes and toys, etc., all contain plasticizers such as vinyl chloride that are added to strengthen the hardness of plastic products. These things should try to avoid contact with oily foods or heating, otherwise the plasticizer in them will Harmful substances dissolve.

In addition, it is best to choose high-heat-resistant polypropylene products for kitchen utensils, such as polypropylene fresh-keeping lids specially designed for microwave ovens. They will not be toxic when heated by microwaves; they should also be avoided in plastic jars. Store wax, detergents, etc., as these chemical vapors will penetrate the plastic material after evaporation, which is harmful to the body. Are the plastic bowls in the canteen poisonous? 3

1. Colorful ceramic bowls

The author has a special hobby, which is to collect exquisite bowls, chopsticks and spoons. I recently researched painted tableware and found that many articles mentioned that painted tableware contains heavy metals, and the heavy metals exceed the standard. Because if the pigment is to be painted on ceramics, it is necessary to add a cosolvent, and the cosolvent will contain lead, cadmium, mercury and other substances.

Suggestion: Don’t pay too much attention to color when buying tableware. The brighter the color, the more likely it is to contain heavy metals. In addition, it is not recommended to heat colored tableware in the microwave.

2. Imitation porcelain tableware

I believe most people don’t know what melamine tableware is, but everyone knows about melamine tableware. Nowadays, many restaurants use this type of tableware. It looks beautiful like ceramics, but its performance is similar to plastic. It can be microwaved, heated and not easily damaged.

Imitation porcelain tableware is made of melamine resin and wood pulp. Melamine is a high molecular polymer, and the monomers are formaldehyde and melamine. This also makes melamine tableware unsafe. First, less than 60% of qualified products on the market are qualified. Second, inferior tableware can release formaldehyde and melamine.

Recommendation: When purchasing melamine tableware, check the brand and quality. The operating temperature should be below 150℃.

3. Copper tableware

Anyone who has eaten hotpot knows that hot pot is best made of ancient copper. However, copper tableware has the possibility of rusting, such as patina, and blue vitriol. The main components of these two substances are basic copper carbonate and copper sulfate pentahydrate. All are toxic to the body.

Suggestion: Try not to use copper tableware, especially after it gets rusty.

4. Aluminum tableware

It is rare to see aluminum tableware in daily life. Aluminum pots and teapots are often seen at home.

Aluminum tableware is not resistant to corrosion, acid and alkali, so when used, aluminum will precipitate and accumulate in the body, leading to aging and memory loss in the long term.

Recommendation: Aluminum tableware should not be exposed to acidic or alkaline substances, salty food should not be stored for a long time, and steel wool should not be used to clean it.

5. Bamboo tableware

Isn’t bamboo a natural plant? Can the tableware made from it be toxic? In fact, bamboo itself is non-toxic and natural and environmentally friendly, but paint is used on its surface. , with long-term use, the paint will enter the body due to high temperature, contact with food, etc. Carcinogenic.

Recommendation: When purchasing, it is better to choose white, no paint, and no smell.

6. Plastic tableware

It is well known that plastic tableware is harmful to the human body and contains carcinogens and endocrine-affecting substances. Even foam tableware can release dioxins.

Recommendation: For the sake of health, avoid choosing and using plastic tableware, and also for the sake of environmental protection.