[China Packaging Network News] The plastic recycling symbol serves as an ID card for plastic packaging containers. A small triangle is usually printed on the bottom of these containers, with numbers ranging from 1 to 7 inside. Each number represents a different type of plastic and has specific uses and safety considerations.
"01" is for single-use bottles only. This stands for PET (polyethylene terephthalate), commonly used in soft drinks and bottled water. It's not suitable for hot liquids, as it can deform or release harmful substances when exposed to heat. Scientists have found that after more than 10 months of use, PET may even release carcinogens. Therefore, it's best to discard these bottles after one-time use rather than reuse them as cups or storage containers.
"02" is for HDPE (high-density polyethylene), often used in cleaning products and shopping bags. While it can withstand high temperatures up to 110°C, it’s not recommended for long-term food storage. Even if cleaned, residues can lead to bacterial growth. Although some large water bottles are made from this material, they should not be used for repeated filling with water due to potential leaching of harmful substances over time.
"03" is for PVC (polyvinyl chloride), often found in raincoats and plastic wraps. This material can release toxic chemicals like vinyl chloride and plasticizers, especially when heated or exposed to fatty foods. It’s rarely used for food packaging, and if it is, it should never be heated.
"04" is LDPE (low-density polyethylene), used in cling film. It melts at around 110°C, which can cause harmful substances to leach into food. Avoid using it when heating food in the microwave.
"05" is PP (polypropylene), safe for microwave use. It can withstand high temperatures up to 130°C and is commonly used in microwaveable meal boxes. However, some containers may have lids made of PS (polystyrene), which shouldn’t be microwaved. Always remove the lid before heating.
"06" is PS (polystyrene), often used in disposable bowls and snack containers. It can break down when exposed to acidic or alkaline substances and should not be used in the microwave. High temperatures can cause it to release harmful chemicals.
"07" includes PC (polycarbonate) and other types. These materials are often used in baby bottles and water jugs but contain bisphenol A (BPA), a substance that can leach out when heated. To reduce risk, avoid heating, direct sunlight, or using dishwashers. Clean with baking soda and warm water before first use, and replace if damaged.
Experts advise against reusing single-use plastic bottles, such as those made of PET. They are designed for one-time use and can release harmful chemicals if reused. Glass or stainless steel containers are safer alternatives for storing food and beverages.
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