Are plastic products safe? Can they be heated and used?

Plastic products can be seen everywhere in daily life, but like Ms. Wang, many citizens know very little about the basic knowledge of plastic products. The author interviewed 20 citizens in a number of supermarkets and residential communities and found that 80% of the citizens often use plastic products in their lives, but they do not know how to use plastic materials and how to be safe.

"According to the regulations, there is a triangle sign with an arrow on the regular plastic utensils, and there is a number in the triangle. These numbers range from 1 to 7, which defines the scope of use." The staff of Dongyang Office of Jinhua Entry-Exit Inspection and Quarantine Bureau introduced Say.

The number 1 indicates that the main manufacturing material is pet (polyethylene terephthalate), which is commonly used to make beverage bottles. It can heat up to 70°C. It is easy to deform when it is filled with high-temperature liquid or heated, which will cause harmful substances to melt out and it is not suitable for recycling. .

The number 2 is hdpe (high-density polyethylene), suitable for cleaning supplies, bath products, etc., and can withstand high temperatures of 110°C, but it is usually not easy to clean and becomes a hotbed of bacteria. It is best not to recycle.

The number 3 is pvc (polyvinyl chloride), which is mainly used for building materials, raincoats, etc., and is rarely used for food packaging. This material is prone to produce harmful substances at high temperatures.

The number 4 is ldpe (low-density polyethylene), which is used to make cling film, plastic film and other products. The heat resistance is not strong. When it exceeds 110 ℃, it will melt and leave some plastic preparations that cannot be decomposed by the human body. Therefore, The real thing is heated in a microwave oven, and the wrapped plastic wrap must be removed first.

The number 5 is pp (polypropylene), which is resistant to high temperatures of 130°C. It is the only one that can be heated in a microwave oven. It can be reused after careful cleaning. However, although some microwave lunch boxes are made of No. 5 pp, the lid is It is made of pet or ps, so it cannot be put into the microwave oven together with the box.

The number 6 is ps (polystyrene), which is often used to make bowls of instant noodle boxes, fast food boxes, etc. This material cannot be placed in a microwave oven, nor can it be used to hold strong acids (such as orange juice) and strong alkaline substances, because it will Decompose polystyrene, which is not good for the human body. Therefore, food should be avoided as far as possible from using fast food boxes to pack hot food or putting bowls of instant noodle boxes into microwave ovens.

The number 7 is pc (polycarbonate), which is used to make water bottles, milk bottles, space cups, etc. Due to incomplete reactions in the production process, plastic containers made of this material are likely to release the toxic substance bisphenol a, and should be avoided as much as possible Use plastic containers made of this material to hold food.
From 1 to 7 represents different materials

Plastic products can be seen everywhere in daily life, but like Ms. Wang, many citizens know very little about the basic knowledge of plastic products. The author interviewed 20 citizens in a number of supermarkets and residential communities and found that 80% of the citizens often use plastic products in their lives, but they do not know how to use plastic materials and how to be safe.

"According to regulations, there is a triangle sign with an arrow on the regular plastic utensils, and there is a number in the triangle. These numbers range from 1 to 7, which defines the scope of use." The staff of Dongyang Office of Jinhua Entry-Exit Inspection and Quarantine Bureau introduced Say.

The number 1 indicates that the main manufacturing material is pet (polyethylene terephthalate), which is commonly used to make beverage bottles. It can heat up to 70°C. It is easy to deform when it is filled with high-temperature liquid or heated, which will cause harmful substances to melt out and it is not suitable for recycling. .

The number 2 is hdpe (high-density polyethylene), suitable for cleaning supplies, bath products, etc., and can withstand high temperatures of 110°C, but it is usually not easy to clean and becomes a hotbed of bacteria. It is best not to recycle.

The number 3 is pvc (polyvinyl chloride), which is mainly used for building materials, raincoats, etc., and is rarely used for food packaging. This material is prone to produce harmful substances at high temperatures.

The number 4 is ldpe (low-density polyethylene), which is used to make cling film, plastic film and other products. The heat resistance is not strong. When it exceeds 110 ℃, it will melt and leave some plastic preparations that cannot be decomposed by the human body. Therefore, The real thing is heated in a microwave oven, and the wrapped plastic wrap must be removed first.

The number 5 is pp (polypropylene), which is resistant to high temperatures of 130°C. It is the only one that can be heated in a microwave oven. It can be reused after careful cleaning. However, although some microwave lunch boxes are made of No. 5 pp, the lid is It is made of pet or ps, so it cannot be put into the microwave oven together with the box.

The number 6 is ps (polystyrene), which is often used to make bowls of instant noodle boxes, fast food boxes, etc. This material cannot be placed in a microwave oven, nor can it be used to hold strong acids (such as orange juice) and strong alkaline substances, because it will Decompose polystyrene, which is not good for the human body. Therefore, food should be avoided as far as possible from using fast food boxes to pack hot food or putting bowls of instant noodle boxes into microwave ovens.

The number 7 is pc (polycarbonate), which is used to make water bottles, milk bottles, space cups, etc. Due to incomplete reactions in the production process, plastic containers made of this material are likely to release the toxic substance bisphenol a, and should be avoided as much as possible Use plastic containers made of this material to hold food.