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There are good ways to identify "hidden poison" plastic bags

Release time:

2022-08-28

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Abstract

At present, many inferior, toxic plastic bags often fish in troubled waters mixed market, because they are the same appearance with ordinary non-toxic plastic bags, ordinary consumers are more difficult to distinguish. In view of this situation, recently relevant experts pointed out that there are three ways to identify hidden plastic bags. According to the relevant national standards, all plastic products containing food should be made of non-toxic plastic, that is, polyethylene as raw material. However, at present, many inferior and toxic plastic bags, especially the black plastic bags used to hold various agricultural and sideline products in some bazaars, are of unknown origin and are suspected of hiding drugs. Plastic bags made of polyvinyl chloride must be poisonous. Because PVC

At present, many inferior, toxic plastic bags often fish in troubled waters mixed market, because they are the same appearance with ordinary non-toxic plastic bags, ordinary consumers are more difficult to distinguish. In view of this situation, recently relevant experts pointed out that there are three ways to identify hidden plastic bags.

 

According to the relevant national standards, all plastic products containing food should be made of non-toxic plastic, that is, polyethylene as raw material. However, at present, many inferior and toxic plastic bags, especially the black plastic bags used to hold various agricultural and sideline products in some bazaars, are of unknown origin and are suspected of hiding drugs. Plastic bags made of polyvinyl chloride must be poisonous. Because the polyvinyl chloride resin has unpolymerized vinyl chloride monomer, which is a compound that is toxic to the human body. In addition, in the process of processing polyvinyl chloride resin into plastic bags, some auxiliary materials such as plasticizers, stabilizers, and pigments must be added. Some of the auxiliary materials are toxic and are easily extracted by oil or water in food. Contaminate food and cause harm to human health. The process of returning to the furnace will also be poisoned.

 

In addition, relevant people in the industry said that at present, many recycled black plastic bags in the market are reprocessed from recycled polyethylene plastic bags. Although most recyclates go through processes such as washing and crushing before being reprocessed, it is not known what they were filled with before they were recycled. If they have been filled with chemical fertilizers, pesticides and other substances, it is impossible to remove all toxic and harmful substances by simple washing alone. With such recycled plastic bags to hold food, high-temperature cooking may not be able to drive poison. In addition, some food bags are printed with trademarks and other words. These pigments themselves may be toxic, while some people like to turn the food bags over and use them again. It is also unsafe to store food stained with these pigments.

 

To find hidden plastic bags, there are the following ways:

1. sensory testing method: non-toxic plastic bags are flexible, hand touch when there is a sense of lubrication, the surface seems to have wax; toxic plastic bags are cloudy or pale yellow in color, feel sticky.

2. jitter detection method: grab one end of the plastic bag and shake it hard. Those who make crisp sound are non-toxic. If the sound is stuffy, it may be poisonous.

3. combustion detection method: non-toxic polyethylene plastic bags can burn, the flame is blue, the upper flame is yellow, emitting paraffin smell when burning; toxic PVC plastic bags are more difficult to burn, yellow when on fire, the outside flame is green, and a pungent smell of hydrochloric acid.

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Vacuum pump vacuum gauge vacuum valve leak detector gas service

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