Many office workers choose to use plastic crisper to br […]
Many office workers choose to use plastic crisper to bring their own meals to the company and use microwave ovens to heat them. There are three types of plastic crisper: PP, plastic PET and PC. Plastic crispers can generally be heated in a microwave oven, but the time and temperature must be controlled; not all materials are suitable for microwave ovens, such as PP with more than 140 materials. The temperature will release harmful substances, so it is not recommended to put it in. In addition, do not rush to open the plastic crisper after heating or freezing, and do not leave it for too long. Let's take a look at the use of plastic crisper! What are the types of plastic crisper materials
1. Plastic PP material Non-toxic, odorless, low density, strength rigidity, hardness and heat resistance are better than low-pressure polyethylene, can be used at about 100 degrees, has good electrical properties and high-frequency insulation is not affected by humidity, density 0.90-0.91, resistance High heat resistance, good toughness and chemical resistance. One of the most commonly used food plastic products. Disadvantages: it becomes brittle at low temperature, not wear-resistant, and easy to age.
2. Plastic PET material Milky white or light yellow, highly crystalline polymer with smooth and shiny surface. It has excellent physical and mechanical properties in a wide temperature range. Heat-resistant to 70°C, it is only suitable for warm or frozen drinks. It is easy to deform if it is filled with high-temperature liquid or heated. Such as mineral water bottles, so never take mineral water bottles to fill hot water.
3. Plastic PC material An amorphous thermoplastic resin with excellent comprehensive properties, excellent electrical insulation, extensibility, dimensional stability and chemical resistance, high strength; also self-extinguishing, flame retardant, non-toxic, colorable, etc. advantage. Disadvantages: The disadvantage is that compared with metal, the hardness is insufficient, and the appearance is easier to scratch. PC glue releases bisphenol A when exposed to heat. Pay special attention when using this plastic container. Many water cups and baby bottles use this material.