What are food grade high-temperature resistant plastics?

Food grade high temperature resistant plastic, as a special material specifically used in the field of food contact, not only requires good high temperature resistance, but also needs to ensure non-toxic and odorless properties, in compliance with food safety standards. Here are some common food grade high-temperature resistant plastics and their characteristics:
1、 Polypropylene (PP):
1. High temperature resistance: PP plastic can withstand temperatures up to 120 ℃, and even in some special formulations, the temperature range can reach around 150 ℃.
2. Safety: PP plastic has good chemical stability, strong resistance to different acidic and alkaline environments, is non-toxic and odorless, and meets food contact safety standards.
3. Application scope: Widely used in the packaging of various liquid foods such as beverages, juices, soy sauce, etc., such as disposable fast food boxes, preservation boxes, etc.
2、 Polyester (PET):
1. High temperature resistance: PET plastic can withstand temperatures up to 140 ℃ and has good mechanical properties and transparency.
2. Safety: PET plastic also meets food contact safety standards and will not have a negative impact on food quality.
3. Application scope: Commonly used in the packaging of various high-temperature liquid foods such as drinking water, carbonated beverages, etc., such as mineral water bottles, lids of some fast food boxes, etc.
3、 Polyetherimide (PES):
1. High temperature resistance: PES plastic has excellent high temperature resistance and corrosion resistance, and its high temperature resistance even exceeds PP and PET.
2. Safety: PES plastic exhibits low toxicity and odor in the food industry, meeting food safety requirements.
3. Application scope: Mainly used in heating plates, oven trays, steamers, and food processing machinery.
4、 Polyphenylene sulfide (PPS):
1. High temperature resistance: PPS plastic has high temperature resistance, corrosion resistance, and electrical insulation, and can withstand extreme high temperature environments.
2. Safety: PPS plastic also exhibits lower emissions of toxic gases and toxins in the food industry, making it more environmentally friendly.
3. Application scope: Suitable for manufacturing ovens, microwave trays, oven plates, and food processing equipment.
In summary, food grade high-temperature resistant plastics play an important role in the field of food contact, with diverse types and unique characteristics. Plastic materials such as polypropylene (PP), polyester (PET), polyetherimide (PES), and polyphenylene sulfide (PPS) are widely used in food packaging, processing equipment, and other fields due to their excellent high temperature resistance and safety. The selection and use of these materials not only ensure the safety and hygiene of food, but also provide strong support for the development of the food industry.