What are food grade plastics?

- Jul 10, 2019-

What are food grade plastics?


1, polyethylene, referred to as PE. It is a high molecular organic compound obtained by addition polymerization of ethylene. Polyethylene is recognized as the best material for food contact in the world. Non-toxic, odorless, odorless, in line with food packaging hygiene standards. Polyethylene film, light and transparent, with moisture, oxygen, acid, alkali, air tightness, heat sealing and other properties. Known as the "plastic flower". It is the most important and most important material for plastic packaging printing. Common plastic wrap, plastic film, etc.


2, PET polyethylene terephthalate


Common mineral water bottles, carbonated beverage bottles, etc. Heat resistant to 70 ° C is easy to deform, and there are substances harmful to the human body. After 10 months of plastic products, the carcinogen DEHP may be released. Do not put in the sun in the car; do not pack alcohol, oil and other substances.


3, HDPE high density polyethylene


Common white medicine bottles, cleaning products, bath products. Don't use it as a water cup, or use it as a storage container for other items. Cleaning is not thorough and should not be recycled.


4, PP polypropylene


Common soy milk bottles, yogurt bottles, juice drinks bottles, microwave lunch boxes. With a melting point of up to 167 ° C, it is the only plastic box that can be placed in a microwave oven and can be reused after careful cleaning. It should be noted that some microwave oven lunch boxes are made of No. 5 PP, but the cover is made of No. 1 PE. Since PE cannot withstand high temperature, it cannot be placed in the microwave oven together with the box.


5, PS polystyrene


Common bowls of instant noodles, fast food boxes. Can not be placed in the microwave to avoid release of chemicals due to excessive temperature. After acid (such as orange juice) and alkaline substances, it will decompose carcinogens. Avoid packing hot food with a snack box. Don't use a microwave to cook bowls of instant noodles.