No.5 pp plastic is polypropylene with a melting point as high as 200 degrees Celsius, which will not change in the high temperature of the optical wave furnace, while other plastics may melt and decompose at high temperature, and may also release toxic substances, which is harmful to human health. Therefore, generally, only the plastic made of No.5 pp can be put into the microwave oven for heating.
The light waves emitted by the microwave oven can make polar molecules in food vibrate, and the molecules collide and rub with each other to generate heat, thus heating food. Water molecules are the most common polar molecules in life. Therefore, microwave heating, to a large extent, heats the water in the substance. The ignition point of paper is about 130 degrees Celsius, and the microwave oven can only heat the paper slightly, but it can't ignite the paper, so the food paper bag can be heated in the microwave oven.
Tilapia is resistant to hypoxia and likes fat water, and the fat pond near the town with a large amount of domestic sewage is also suitabl