How much do you know about the inspection of food packaging bags?

Many customers are confused. They are not familiar with packaging bags themselves. How can they inspect the packaging bags they have custom-made from the manufacturer? In fact, there are many aspects to determine whether a packaging bag is qualified. Moreover, the judgment standards vary depending on the different industries where the packaging bags are used. However, generally speaking, there are several aspects that we need to pay special attention to. If these details are not paid attention to, it indicates that the packaged products produced are highly substandard.

The environmental friendliness of the packaging bag is also a criterion for judging whether it is qualified. Below, the plastic packaging bag manufacturer will teach you how to identify whether plastic packaging bags may be toxic or unhygienic:

1. Test plastic packaging bags by using water: Place the plastic bag in water and observe whether it floats to the surface. If it floats to the surface, it is a non-toxic plastic bag; if it sinks to the water, it is a toxic plastic bag.

2. Test by shaking the plastic packaging bag: A very simple method is to hold the plastic bag with your hand and shake it a few times. If the sound is clear and clean, it is a non-toxic plastic bag. If the sound is dull, it indicates that it is a toxic plastic bag.

3. Test by burning plastic bags: Non-toxic plastic bags are prone to burning. If observed carefully, it can be found that the color of the flame during burning is yellow at the tip and blue in some areas. Moreover, it drops like a candle during burning and has a paraffin smell. Toxic plastic bags are not easy to burn. They go out immediately when removed from the fire source. The tips are yellow while some parts are green. After burning, they become in a stretched state.

4. The plastic packaging bags can be detected by their own color and by touching them: Non-toxic plastic bags are milky white or colorless and transparent, and feel smooth when touched by hand. The toxic plastic bags are rather cloudy in color, mainly yellow, red and black, and feel a bit sticky when touched by hand.

The key point here is that colored plastic bags or those with a rather dull color are mostly substandard products and have certain toxicity. Do not use them to hold food, especially black plastic bags. They not only harm our physical and mental health but also cause certain pollution to the environment and damage the ecological environment.

The first priority is that the sealing performance of the packaging bags should be high, especially for food packaging bags, which must be completely sealed. If there is any air leakage, it will definitely affect the quality of the food inside. It is very simple to determine whether it is air leakage or not. Just randomly take a packaging bag and add water to it to check if there is any air leakage. If there is air leakage, the water will leak out; if there is no air leakage, the water will not leak out. Or you can determine it by adding air to it. However, any leaky packaging bag will make a leaking sound when gas enters, which is quite easy to identify. The sealing property of packaging bags is widely used in the food industry and is also a very important aspect.

In addition to the sealing property, the thickness of the packaging bag is also a criterion for judgment. The packaging bags are all formed in one piece, and their thicknesses should be quite uniform. If one side is thinner and the other is thicker, it indicates that the discharge port is blocked. At this time, the discharge port should be unblocked immediately; otherwise, this batch of packaging bags will all have this problem. This situation can easily burst the thinner side when some toys or items with corners are packaged, but it has little impact on the thicker side.

In addition to the hard quality requirements, all the information on the packaging bag must be complete; otherwise, it will be classified as an unqualified product. It is necessary to have anti-counterfeiting labels and entry dates. Moreover, there should be many explanations and introductions, especially the descriptions of the items must be complete. Be straightforward and not exaggerate the reality. The packaging bag should be designed based on scientific standards. Do not present some misleading language and pictures to consumers, otherwise it is very likely that the company will be punished for defrauding consumers.