Plastic bags are also used when filling food in daily life, but there are also different types of plastic bags. Some may not be able to withstand strength, and some may not be able to withstand high temperatures, so they are not suitable for a long time. Load food. However, with the gradual improvement of technology, completely different plastic bags have already appeared in the current market. Polyethylene plastic bags can directly contact food, and there are many advantages. Then this kind of plastic bag has What kind of characteristics?
What are the advantages of polyethylene plastic bags
First of all, this material has a non-toxic effect, so it is very safe in the process of use, and it is not easy to cause health hazards, and it is originally a flexible translucent material without any toxic side effects. Very superior performance. The water permeability is relatively low. Generally, the transparency will gradually increase with the crystallinity, and at the same time, it may also drop to a certain degree of crystallinity. Then the transparency will also gradually increase with the molecular weight. The melting point of high-density polyethylene is basically They are all around 132 degrees to 135 degrees, so they have a better ability to withstand heat. Even if you store food in daily life, you don’t need to worry too much. It is convenient to use in daily life and is basically not prone to problems.
How to distinguish polyethylene plastic bags from other materials
First of all, it is recommended to use the shape. If you choose a polyethylene material, you will naturally find that the surface is very shiny as if it is waxed, and it is more lubricious to touch with your hands, and it will not feel sticky. This is also the most The main method is one, but it also requires a certain amount of experience. If there is no experience, there is definitely no way to find the difference.
If you want to buy a polyethylene plastic bag that satisfies you, you can also choose some professional testing methods. I believe everyone knows that the proportion of polyethylene plastic bags is relatively small, so if you just throw a small piece of plastic bag in the water, There will be no sinking at all, but will always float on the water, which means that what I bought is a polyethylene plastic bag. In addition, it can also be burned. Such a material itself is easy to burn, and it will ignite a yellow flame with a slight click, and it does not have a pungent smell and does not emit smoke. After burning, there will be a smell of paraffin, which is also one of the methods.
With the gradual improvement of living conditions, in fact, many people also require a high-quality life, so unknowingly, polyethylene plastic bags have become a detail that cannot be ignored in life. When we use this material, it can naturally be used to hold food. You don’t need to worry about safety at all, but at the same time, you must also understand how to distinguish it from other materials. There are many methods, such as the above three methods are more common. As for how to look at it, it should be based on the actual situation. If you have a certain degree of professionalism, you can naturally look at the shape and vice versa. If you don’t have this kind of professional ability, you can also directly cut out a small piece of plastic. The bag, placed by the water, can also be understood by observation.