Pay attention when using these plastic products_ Lunch box_ Plastic bag_ material
2022-08-07 22:56 Source: Lao Liu said life
Original title: Pay attention when using these plastic products!!!
Pay attention when using these plastic products!!!
Our daily life seems to be inseparable from plastic products: cups, tableware, straws, packing boxes, etc. Some people use free plastic bags provided by supermarkets to separate vegetables and meat, and put them directly into the refrigerator; Some people reuse disposable plastic lunch boxes; Others use plastic bottles to pack condiments... but these behaviors are really undesirable！
Not all plastic bags can hold food
Most 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 hold fresh food. Moreover, PE plastic bags also have defects: heat resistance is not very strong, and once the temperature exceeds 80 ℃, melting and decomposition may occur; 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 contacting with oil, the two substances may swell and decompose to a certain extent, and dissolve in the oil, making the oil have a hara flavor.
Therefore, it is better not to use transparent plastic bags in supermarkets for hot food, nor to use them to separately pack meat directly into the refrigerator. Frozen meat is still recommended to use food-grade bags with good sealing.
When using plastic lunch boxes, pay attention to these matters
Remove the lunch box when heating
Some microwave oven lunch boxes are made of polypropylene (PP), but the box cover is made of PE, which is not resistant to high temperature. So remember to take off the lid before putting it into the microwave oven
Replace in time
The service life of the lunch box is generally 3-5 years, but when it becomes discolored, brittle or yellow, it should be replaced immediately.
Clean in place
In order to ensure the tightness of some lunch boxes, a sealing ring will be installed on the cover. However, the food residue seeps into the sealing ring and becomes a "blessed place" for mold. It is recommended that the sealing ring and its groove be cleaned and dried before being put back on the cover.
Do not put 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 aging. Therefore, if you have homemade vinegar pickled peanuts, red bayberry wine, etc., you might as well use glassware for storage.
Disposable plastic take-out box is not recommended to be reused
Now, many takeout boxes look very good and are marked with relatively safe PP materials. Some people can't help but wash them and store them at home for reuse. But this is actually wrong. Due to cost control and other reasons, the disposable lunch box usually has no very high safety standard. The purpose of its production is to contain food with high temperature and possible oil once. It is safe to use it under such conditions. However, if used more often, its stability will be damaged, and the release of harmful substances may affect health in the long run.
Can plastic bottles for drinks contain condiments?
Many people wash the bottles after drinking the drinks, and leave them to fill with water or some beans, coarse grains, soy sauce and vinegar, and even pickles. But plastic bottles for drinks should be thrown away after drinking. First of all, the plastic bottles used to hold drinks are usually poor in heat resistance, and the maximum use temperature is not more than 70 ℃. Once heated or filled with boiling water, it is easy to deform, and harmful substances will also be dissolved. Secondly, this plastic bottle is easy to precipitate harmful substances in case of oil, acid and alkali substances. In addition, the more times plastic bottles are reused, the higher the probability of releasing carcinogens and the more bacteria they breed.
Two key points: safe use of plastic products
Look at the sign
Generally, plastic products will be marked with "identity" with a number of 1-7. These numbers include some safety tips:
No. 1 plastic, commonly used for making mineral water bottles and carbonated beverage bottles. Hot water cannot be loaded or reused.
No. 2 plastic, mainly used to make containers for cleaning products and bath products. The density is very high, very strong, and can be reused.
No. 3 plastic, commonly used to make raincoats and garbage bags in life, plastic plastic sheds and rubber pipes for agriculture, etc. Good performance, wear-resistant, acid-resistant, but heat-resistant and 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, commonly used to make plastic cups and plastic lunch boxes. It can be used for food storage and microwave heating.
No. 6 plastic, commonly used in the production of bowls of instant noodles and fast food boxes. Heat-resistant (heat-resistant 60 ℃~70 ℃), cold-resistant, but cannot be put into the microwave oven, and cannot be used to contain strong acid and strong alkaline substances.
No. 7 plastic, mostly used for making milk bottles, space cups, etc. It is not suitable to fill with boiling water.
Many large brands will mark the instructions on the product packaging. For example, what is the applicable temperature and whether it can be put into the microwave oven or refrigerator.
Finally, it is recommended that you reduce the use of plastic products, and more recommend that you use cloth bags, paper bags, porcelain or glass products, which can protect the environment and benefit your health!
Source: Shaanxi Association for Science and Technology and Shuibo Technology returned 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: Shanxi Province
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