Is plastic bucket and plastic bottle the same raw material?
When the number of the triangle in the bottom of the plastic barrel is 5, the main component of this kind of plastic barrel is polypropylene, or PP. The melting point of this kind of plastic barrel is relatively high, reaching 167 degrees centigrade, and can be recycled after cleaning. Compared to PE plastic barrels, PP plastic barrels of heat resistance slightly better, but the higher temperature there is the risk of softening and melting, use should avoid high temperature.
When the number of the triangle in the bottom of the barrel is "4", the main component of this kind of plastic barrel is low-density polyethylene, also called LDPE. Such plastic barrels of heat resistance is not strong, in case of high temperature, there will be hot melt phenomenon, will produce some of the body can not be decomposed plastic preparations, may cause breast cancer, neonatal congenital defects and other diseases.
When the number of the triangle in the bottom of the plastic barrel is "3", the main component of the plastic barrel is polyvinyl chloride, also called PVC. This kind of plastic barrels can heat 81 DEG C, and the production process will use a lot of plasticizer (such as plasticizer, DOP) and heavy metal containing heat stabilizer, and the synthesis process is difficult to eliminate the presence of free monomer, these are considered to be toxic. Therefore, this kind of plastic bucket can not be placed people can eat directly, but also can not be recycled. Since the PVC used in this kind of plastic barrel is a kind of plastic which is not high temperature resistant, it can not be used in places where the temperature is higher.
When the number of the triangle in the bottom of the plastic bucket is 2, the main component of this kind of plastic barrel is high-density polyethylene, or HDPE. This kind of plastic barrel has a higher melting point than PET plastic barrel, but the heat resistance can not reach 100 centigrade. HDPE itself is non-toxic. But this kind of plastic barrels in the production process used in some processed or modified additives, such as fillers, stable additives or pigments, these materials contain harmful substances, so this kind of plastic barrels after use not when the containers or other articles.
When the number of the triangle in the bottom of the barrel is "1", the main component of this kind of plastic bucket is polyethylene terephthalate (polyester), which is often called PET. The melting point of this kind of plastic barrel is high, but the heat resistance can only reach 70 degrees centigrade, and it is easy to deform. When the temperature of the plastic barrel is higher than that of the plastic bucket, the possibility of dissolving harmful substances in the plastic barrel is increased, and the material such as wine, oil and the like can be easily twisted and contracted. As China has traditionally been thrifty, people tend to reuse plastic buckets. However, this kind of plastic barrels of repeated use, may release carcinogenic DEHP, if such liquid plastic barrel by people drinking, will may be suffering from cancer, also has toxicity to male testis, its harm should not be overlooked.
