Original title: Be careful when using these plastic products!
Our daily life seems to be inseparable from plastic products: cups, tableware, straws, packaging boxes, etc. Some people use free plastic bags provided by supermarkets to pack vegetables and meat and put them directly into the refrigerator; Some people reuse disposable plastic lunch boxes; Some people use plastic bottles to pack condiments... but these behaviors are really undesirable!
Not all plastic bags can hold food
Most of the plastic bags in regular supermarkets are made of polyethylene (PE). It is no problem to pack some daily necessities at normal temperature, but only special "food grade" PE fresh-keeping bags can be used to store fresh food. PE plastic bags also have defects: heat resistance is not very strong, once the temperature exceeds 80 ℃, it may melt and decompose; Do not touch grease for a long time. The raw materials of PE are mainly low density polyethylene (LDPE) and linear low density polyethylene (LLDPE). When they come into contact with oil, these two substances may swell and decompose to a certain extent, and dissolve in oil, thus causing oil to produce halo. taste.
Therefore, it is better not to use transparent plastic bags in supermarkets to pack hot food, nor to use them to directly put meat into the refrigerator. It is still recommended to pack frozen meat in food-grade, well-sealed bags.
Pay attention to these matters when using plastic lunch boxes
Take out the lunch box when heating. Some microwave oven lunch boxes are made of polypropylene (PP), but the cover is made of polypropylene (PP). Made of PE material, PE is not resistant to high temperature. So remember to take off the lid before putting it into the microwave oven.
2. The service life of the timely replacement lunch box is generally 3-5 years, but it should be replaced immediately in case of discoloration, embrittlement or yellowing.
In order to ensure the tightness of some lunch boxes, sealing rings will be installed on the cover. However, food residue seeps into the sealing ring and becomes a "blessed place" for mold. It is recommended to clean the sealing ring and its groove after each cleaning, and then put it back on the cover after drying.
Do not store food that accelerates the aging of the lunch box. If alcohol, carbonated drinks, vinegar and other acidic substances are stored in the lunch box for a long time, it is easy to accelerate the aging. Therefore, if you have homemade vinegar pickled peanuts, plum wine, etc., you can use glassware instead.
Disposable plastic takeout boxes are not recommended to be reused. Now many takeout boxes look good and are marked with relatively safe PP material. Some people can't help but wash them and leave them at home. Use. But in fact, this is wrong. Due to cost control and other reasons, disposable lunch boxes usually do not have high safety standards. The purpose of their production is to contain food that has been, is hot and may have oil. It is safe to use in this case However, if it is used repeatedly, its stability will be destroyed, and harmful substances will be released, which may affect health in the long run.
Drinks are made of plastic bottles. Can plastic bottles contain condiments? Many people wash the bottles after drinking the drinks, and then fill them with water or some beans, coarse grains, soy sauce, or even pickles. However, plastic bottles used for beverages should be discarded after drinking. First of all, plastic bottles used to hold drinks are generally poor in heat resistance, and the maximum use temperature is not more than 70 ℃. Once heated or injected with boiling water, it is easy to deform and dissolve harmful substances. Secondly, this plastic bottle is easy to precipitate harmful substances when encountering oils, acids and alkalis. In addition, the more times plastic bottles are reused, the higher the possibility of releasing carcinogens and the more bacteria they breed. Two key points, the safe use of plastic products I. Look at the signs
Generally, plastic products will use numbers 1-7 to indicate "identity". These numbers include some safety tips:
No. 1 plastic is often used to make mineral water bottles and carbonated beverage bottles. It cannot be filled with hot water and cannot be reused.
No. 2 plastic is mainly used to manufacture containers for cleaning products and bathing products. High density, strong and reusable.
No. 3 plastic is often used to make raincoats, garbage bags, plastic sheds, rubber pipes, etc. for agriculture. Good performance, wear-resistant and acid-resistant, but not heat-resistant and non-toxic.
No. 4 plastic, commonly used to produce fresh-keeping film, plastic film and other materials. It is breathable, impermeable and heat resistant.
No. 5 plastic is often used to make plastic cups and plastic lunch boxes. It can be used for storing food and microwave heating.
No. 6 plastic, commonly used for making bowls of instant noodles and fast food boxes. Heat resistance (heat resistance 60 ℃~70 ℃), cold resistance, but can not be put into microwave oven, can not be used for strong acid, strong alkaline substances.
No. 7 plastic is mostly used for making milk bottles, space cups, etc., and is not suitable for boiling water.
2、 See instructions for use
Many large brands will mark the description on the product package. For example, what is the applicable temperature and whether it can be put into a microwave oven or refrigerator. Finally, we recommend that you reduce the use of plastic products. We recommend that you use cloth bags, paper bags, porcelain or glass products, which can not only protect the environment, but also benefit your health! Go back to Sohu to see more
Statement: This article only represents the author. Sohu is an information release platform, and Sohu only provides information storage space services.
Published in: Gansu Province