PET (polyethylene terephthalate): commonly used to make food grade plastic boxes and beverage bottles. Transparent fruit boxes, cake boxes, etc. are made of PET sheet blister, which is a food-grade safe plastic material. However, PET plastic is heat-resistant up to 70°C and is not suitable for use in high-temperature environments, otherwise harmful substances will be dissolved.

PP (polypropylene): safe and non-toxic, resistant to low and high temperatures, and is the only plastic that can be heated in a microwave oven. PP plastic has high strength and folding resistance, and is often used to make food-specific plastic bags, plastic boxes, straws, etc.

HDPE (high-density polyethylene): has a high operating temperature, hardness, mechanical strength and chemical resistance, is a non-toxic and safe material, and is often used in the production of plastic containers for food.

LDPE (Low-density polyethylene): tasteless, odorless, non-toxic, matte surface, commonly used in plastic parts for food, composite films for food packaging, food cling film, etc.

PS (polystyrene): commonly used to make bowl instant noodle boxes, fast food boxes, disposable food packaging boxes, etc., with good cold resistance. Food-grade PS sheets are also used in containers such as yogurt cups.

PC (polycarbonate): widely used in the production of plastic containers, a safe material, often used in sports water bottles, etc.

The selection of these materials is mainly based on their physical and chemical properties and safety. For example, PP plastic is often used in food packaging that requires microwave heating due to its high temperature resistance; while PET plastic is often used to make transparent fruit boxes and cake boxes due to its transparency and lightness. Choosing the right material can ensure the safety of food and the durability of packaging.

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