Can plastic bowls be used for a long time? At present, most pp plastic lunch boxes on the market are made of polypropylene plastic, but we often wonder whether harmful substances in plastic will migrate into food. Will the plastic bowl last long?
Can plastic bowls be used for a long time? 1 What happens if you use too many plastic bowls?
If you haven't bought a bowl yet, it's more reassuring to choose an enamel bowl to heat food in the microwave oven. There are many invisible micropores in the plastic bowl, which often hide the filth and accommodate the filth. If not cleaned, these bacteria will enter our bodies. If necessary, heat the plastic bowl in the microwave oven. Be sure to buy plastic bowls with regular heating materials. Relatively greasy food is not suitable for heating in plastic bowls.
Some plastic bowls will release bisphenol A(BPA). Long-term consumption will lead to genetic abnormalities, and pregnant women will lead to miscarriage and birth defects. Long-term use of plastic bowls will also increase the cancer rate to a certain extent, because it will release bisphenol A and phthalates, especially when oily food is heated with plastic bowls. A plasticizer will be added to the plastic bowl market, which contains some toxic chemicals, and the plastic bowl will be diluted when it is cleaned or heated at high temperature.
Moreover, there are many invisible micropores in the plastic bowl, which often hide the filth and accept the filth. If not cleaned, these bacteria will enter our bodies. In fact, there are many kinds of plastics, and each plastic has different uses and uses. They have their own unique advantages, take our plastic bowls for example.
Not every kind of plastic can be used to make plastic bowls. The plastic bowls in our market are all made of plastic specially made for bowls, which will not affect our health.
When we buy plastic bowls, we also want to buy plastic bowls with better price and quality. The plastic bowls we mentioned earlier are not harmful to our health, but that is only for some plastic bowls with better quality. If we use low-quality plastic bowls, then we can't guarantee that this plastic bowl will not have any impact on our health.
Harm of long-term use of plastic bowls
Long-term use of plastic bowls is harmful to health. Plasticizers are often added to plastics because they contain some toxic chemicals. When hot water or boiled water is filled in a plastic bowl, toxic chemicals are easily diluted into water, and there are many small holes in the internal microstructure of plastic, which contain dirt. If it is not cleaned properly, bacteria can easily breed.
When purchasing plastic bowls, you must choose cups made of food-grade plastic that meet the national standards. Among all bowls made of materials, the glass bowl is the healthiest, the glass surface is smooth and easy to clean, and bacteria and dirt are not easy to breed on the cup wall, so people use the glass bowl is the healthiest and safest.
Can plastic bowls be put into the microwave oven?
When we buy plastic bowls, we should try to buy some plastic bowls that can be put in the microwave oven, which can effectively prevent the plastic from emitting harmful substances. At present, plastic lunch boxes for microwave ovens mainly use polypropylene or polyethylene. If the temperature exceeds their heat resistance limit, plasticizers may be released. Therefore, it is necessary to avoid heating food with plastic lunch boxes at high temperature for a long time.
Can plastic lunch boxes be heated by microwave?
If the plastic lunch box is made of polypropylene (PP) or polyethylene (PE), it can be heated by microwave oven. But long-term high-temperature heating should be avoided. Every plastic has a heat resistance limit. Among the food materials, the most heat-resistant is polypropylene (PP), which can withstand 140℃, followed by polyethylene (PE), which can withstand 1 10℃, and polystyrene (PS), which can only withstand 90℃.
Commercial plastic lunch boxes for microwave ovens are mainly made of PP or PE. If the temperature exceeds their heat resistance limit, plasticizers may be released. Therefore, it is necessary to avoid heating food with plastic lunch boxes at high temperature for a long time. Plastic products also have shelf life. After expiration, the plastic will age, change color and become brittle. If the used plastic box is found to be yellow or no longer transparent, it should be replaced as soon as possible.
Consumers must pay attention to the shelf life of plastic products. At the same time, aging plastics may release substances harmful to human body. As for the "life" of a plastic lunch box, it depends on personal use and cleaning methods. The shelf life of most plastic products is generally about three to five years. If you use it frequently, it is best to replace it once every one to two years.
Can plastic bowls be used for a long time? Harm of direct microwave heating porridge in ordinary plastic cups
There is a special device in the microwave oven-magnetron, which can convert electric energy into microwave energy, that is, electromagnetic waves, which pass through plastic containers to stimulate the violent collision between water molecules in food and heat food.
Principle of hot porridge in microwave oven
When porridge is put in a microwave oven, the magnetron of the microwave oven will convert electric energy into microwave energy, that is, electromagnetic waves. It will penetrate the plastic cup filled with porridge, stimulate the water molecules in the porridge, make the water molecules collide with each other to generate heat, and use this heat to heat the porridge.
Note: If there is something wrong with the plastic material of porridge, it will lead to the direct fusion of harmful plastic materials with porridge, which will cause various diseases when it enters people's mouth. Because in the process of electromagnetic wave penetrating the plastic cup, if the plastic material is inferior, the stability of plastic molecules may be destroyed at high temperature, and toxic substances in plastic may be released and spread into porridge, causing harm to the body.
Harmful components of inferior plastic materials
PVC: Plastics are mainly made of PVC. This chemical will release toxic substances when it meets high temperature, and drinking it with porridge is harmful to health.
Phthalates: Synthetic chemicals-phthalates may harm male reproductive organs, affect children's sexual development, and even lead to reproductive system cancer.
Phenolmethane: This is a chemical commonly used in plastic products, which may cause breast cancer in women.
Can't porridge in plastic cups be heated in microwave oven at present?
With the progress of science and technology, the research and processing of materials, and the improvement and innovation of packaging design technology, nutrition porridge has not only broken through the limitation that porridge in plastic cups cannot be heated by microwave oven, but also led the new revolution in porridge market and made great achievements.
The bottled porridge made of palm food treasure is made of pollution-free plastic, and the container design and appearance design have won many patents. Bottled porridge has exhaust function, and users can drink it safely and healthily. At present, the products have passed the National Food Quality Supervision and Inspection Center, ensuring that no harmful substances will be produced after microwave heating.
Can plastic bowls be used for a long time? Is the plastic tableware in the restaurant poisonous?
In fact, this mainly depends on whether the products purchased by the merchants are qualified.
First, low-priced tableware may be technically unqualified and easy to release toxic substances.
Second, melamine tableware can be faked. There is a kind of tableware in the market, which is made of urea-formaldehyde resin. It is similar to melamine tableware in appearance, but its safety is different. Not suitable for storing food, toxic substances are easy to migrate.
Discussion on the selection of melamine tableware
1. Purchase occasions should be formal, such as large supermarkets and shopping malls. Usually the products on these occasions have quality certificates.
2. Look for quality and safety signs. Melamine tableware is usually replaced by "MF" and urea-formaldehyde resin is usually replaced by "UF". MF is tableware for holding food, UF is tableware for holding non-food or serving as a fruit bowl.
3. See the working temperature clearly. The maximum service temperature of melamine tableware for food is 120℃. At the same time, it will also indicate that it is made of 100% melamine, or the material is "A5".
4. It is not recommended to use brightly colored tableware, especially those with printed patterns. It is best to choose light-colored melamine tableware.
5. Avoid choosing deformed tableware, and it is best to disinfect it with hot water or soak it in vinegar for several hours before use.