塑料等级1-7分别代表什么意思

Plastics are commonly used in our daily lives. From household objects to automotive parts, plastics can be found in almost every aspect of modern lif However, not all plastics are created equal. In fact, there are seven different types of plastic classifications known as plastic resin codes. These plastic resin codes are categorized by the Society of the Plastics Industry (SPI) and are represented by numbers ranging from 1 to Each type of plastic represents a unique property that determines its suitability for various applications.

Plastic Code 1 – Polyethylene Terephthalate (PET)

PET is the most widely used plastic in the world and is commonly found in food packaging and various beverage bottles, including soda and water bottles. This type of plastic is clear and strong, and its low weight makes it a popular choice for packagin

Plastic Code 2 – High-Density Polyethylene (HDPE)

HDPE plastics are known for their strength and durability. They are commonly used for products like milk jugs, grocery bags, and shampoo bottles.

Plastic Code 3 – Polyvinyl Chloride (PVC)

PVC is a highly versatile plastic and is commonly used in products such as pipes, window frames, and floorin However, it is also one of the most toxic plastics and should be disposed of carefully to avoid environmental harm.

Plastic Code 4 – Low-Density Polyethylene (LDPE)

LDPE is a flexible and non-toxic plastic that is commonly used for products like shopping bags, squeeze bottles, and food storage bags.

Plastic Code 5 – Polypropylene (PP)

PP is known for its toughness and resistance to heat. It is commonly used in products like yogurt containers, bottle caps, and medicine bottles.

Plastic Code 6 – Polystyrene (PS)

PS is a rigid, brittle, and lightweight plastic that is commonly used for products like disposable cutlery, foam cups, and takeout containers. However, polystyrene has a major environmental impact and is difficult to recycl

Plastic Code 7 – Other (BPA, Polycarbonate, and LEXAN)

Code 7 represents any plastic that does not fit into one of the above categories. BPA, polycarbonate, and LEXAN are all materials that can be found in products like baby bottles, DVDs, and water bottles. However, they are controversial plastics that have been linked to various health risks and should be used with caution.

In conclusion, plastic resin codes serve as a useful tool to help individuals and businesses identify and understand the properties and potential risks associated with different types of plastics. Proper disposal and recycling of plastics can help reduce the environmental impact and ensure a sustainable future for all.