Distinguish between toxic plastic bags and non-toxic plastic bags:

1. Burning identification:

Non-toxic plastic bags are made of polyethylene and other raw materials. Polyethylene can burn, the flame is blue, the upper end is yellow, and it emits a paraffin smell when burning.

Toxic plastic bags are made of vinyl chloride. PVC is extremely difficult to burn. When it catches fire, it appears yellow with green outside and emits the pungent smell of hydrochloric acid.

2. Different bulk weights Identification:

Put the plastic bags at the bottom of the water. Since the bulk density of polyethylene and polypropylene is less than that of water, polyethylene and polypropylene are non-toxic plastic bags floating on the water.

Because polyvinyl chloride and polystyrene have a bulk density greater than water, polyvinyl chloride and polystyrene will become toxic plastic bags when they sink to the bottom of the water.

3. Distinguish from the appearance:

For non-toxic plastic bags, polyethylene and polypropylene are relatively soft and basically transparent, but polyethylene is milky white and polypropylene is white.

Poisonous plastic bags. Plastic bags made of polyvinyl chloride are slightly yellow, have worse softness than polyethylene and polypropylene, and have a slight smell of plasticizer.

Extended information:

Plastic hazards

1. Agricultural impact

Waste plastic products are mixed in the soil and continue to accumulate, which will affect the absorption of crops. nutrients and moisture, leading to reduced crop yields.

2. Animal threats

Waste plastic products abandoned on land or in water are swallowed by animals as food, resulting in the death of animals. Nearly 1,000 sheep of 20 herdsmen households on the banks of Qinghai Lake died as a result, causing economic losses of more than 300,000 yuan.

Sheep like to eat the oily residue wrapped in plastic bags, but they often eat the plastic bags together. Because the plastic they eat stays in the stomach for a long time and is difficult to digest, the stomachs of these sheep are squeezed. When it is full, it can no longer eat, and in the end it can only starve to death. Such things are common in zoos, pastoral areas, rural areas, and oceans.

Because plastic is not naturally degradable, it has led to many animal tragedies. For example, monkeys, pelicans, dolphins and other animals in the zoo will accidentally swallow the No. 1 plastic bottle thrown away by tourists, and eventually die in pain due to indigestion.

Looking at the beautiful and pure sea surface, and looking closer, it is actually filled with all kinds of plastic garbage that cannot be accommodated by the ocean. In the intestines of many dead seabird samples, we found that A variety of indigestible plastics.

Colorful plastic fragments washed up on the beach. A black albatross on the island mistakenly mistook Lego toys for food. Its digestive system was blocked and it eventually starved to death.

A seal was entangled in a blue plastic net and could not return to the sea; a brown turtle began to slowly eat a thin piece of plastic bag. An environmental organization once issued a report saying that they found at least 267 species of marine life suffering from eating marine garbage or being entangled in garbage.

According to the United Nations Environment Program, plastic debris kills more than 1 million seabirds and more than 100,000 marine mammals every year.

3. Difficulties in processing

Waste plastics being landfilled with garbage will not only occupy a large amount of land, but also the occupied land will not be restored for a long time, affecting the sustainable use of the land. If the waste plastic products that enter the domestic garbage are landfilled, it will take 200 years to degrade. Moreover, plastic bags are made of petroleum, which not only consumes a lot of resources, but also cannot be decomposed. If buried underground, it will pollute the land and rivers.

Baidu Encyclopedia-Plastic Bags