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Plastic buckets are widely used throughout China and come in many varieties. If we look closely, we'll find a triangle with an arrow at the bottom of each bucket, containing a number. This number often determines the composition and intended use of the plastic bucket. Now, let me briefly introduce the classification of plastic buckets. Hope this is helpful to everyone. 继续了解

1. When the number inside the triangle at the bottom of the plastic bucket is "1" The main component of these plastic buckets is polyethylene terephthalate (PET). These buckets have a high melting point, but their heat resistance only reaches 70°C, making them prone to deformation. When the temperature of the contents exceeds a certain level, the possibility of harmful substances leaching out increases. They are also prone to twisting and shrinking, and should not be used to store alcohol, oil, or similar substances. Due to China's long-standing tradition of thrift, people often reuse plastic buckets. However, repeated use of these buckets may release the toxic substance DEHP. If the liquid inside is consumed, it could potentially cause cancer and is toxic to the testes in men; the dangers should not be underestimated. 延伸阅读

2. When the number inside the triangle at the bottom of the plastic bucket is "2* The main component of these plastic buckets is high-density polyethylene, abbreviated as HDPE. These plastic buckets have a higher melting point than PET plastic buckets, but their heat resistance does not reach 100°C. HDPE itself is non-toxic. However, some processing or modifying agents, such as fillers, are used in the production of these plastic buckets. Stabilizing agents or pigments may contain harmful substances, so these plastic buckets cannot be used as storage containers or other items after use.

3. When the number inside the triangle at the bottom of the plastic bucket is "3" The main component of these plastic buckets is polyvinyl chloride, also known as PVC. These buckets can only withstand temperatures up to 81°C, and the production process uses large amounts of plasticizers (such as DOP) and heat stabilizers containing heavy metals. Furthermore, it's difficult to completely eliminate the presence of free monomers during the synthesis process, all of which are considered toxic. Therefore, these plastic buckets cannot hold directly edible items and are not reusable. Because PVC is a type of plastic that is not heat-resistant, they cannot be used in high-temperature environments.

4. When the number inside the triangle at the bottom of the plastic bucket is "4" Note: The main component of this type of plastic bucket is low-density polyethylene, also known as LDPE. This type of plastic bucket is not very heat-resistant and may melt when exposed to high temperatures, producing some plastic additives that the human body cannot break down, which may cause diseases such as breast cancer and birth defects in newborns.

5. When the number inside the triangle at the bottom of the plastic bucket is "5" The main component of this type of plastic bucket is polypropylene (PP). These buckets have a relatively high melting point of 167°C and can be reused after cleaning. Compared to PE plastic buckets, PP plastic buckets have slightly better heat resistance, but they still risk softening and melting at higher temperatures. High temperatures should be avoided during use.

6. When the number inside the triangle at the bottom of the plastic bucket is "6" The main component of this type of plastic bucket is polystyrene, abbreviated as PS. While these buckets are heat and cold resistant, they release chemicals at excessively high temperatures. They should not be used to hold strong acids or alkalis because they will decompose and release harmful, carcinogenic polystyrene. These buckets are flammable and produce large amounts of toxic gases when burned; the dense smoke and toxic gases produced after a fire can directly lead to death.

7. When the number inside the triangle at the bottom of the plastic bucket is "7" The main component of these plastic buckets is polycarbonate, also known as PC. These plastic buckets are non-toxic, have good properties, are tough and rigid, and have good light transmittance. These plastic buckets are very similar to those used in our daily lives; for example, the drinking water buckets we use are made of this type of plastic.