Food grade PET Vs. Food grade PP

Food grade PET and PP are two common food packaging materials that are environmentally friendly plastics that can come into direct contact with food without releasing harmful substances. However, they also have their own advantages and disadvantages for different food packaging needs.

In general, consider the following aspects when choosing food grade PET and PP:

Barrier performance: Barrier performance refers to the plastic's ability to block external factors such as oxygen, moisture, light, etc., which affects the freshness and nutrition of the food.PET has good barrier performance, which prevents the entry of oxygen and moisture and maintains the taste and bubbles of the beverage; PP also has certain barrier performance, which maintains the freshness and aroma of the food.

Heat sealing performance: Heat sealing performance refers to the ability of plastic to form a firm seal under a certain temperature and pressure, which affects the sealing and safety of food. both PET and PP can be heat sealed, but the heat sealing temperature of PP is lower than that of PET, which is more suitable for microwave heating.

Heat-resistant performance: heat-resistant performance refers to the plastic in high or low temperature will not be deformed or decomposition of the ability to affect the quality and safety of food, PP's heat-resistant performance is better than PET, can withstand high temperatures of 130 ℃, is the only can be put into the microwave oven plastic boxes; PET does not resist high temperatures, can only withstand high temperatures of 70 ℃, if loaded with high-temperature liquids or heat will be deformed, and there may be a possible release of substances harmful to the human body.

Safety performance: Safety performance refers to whether the plastic contains substances that are harmful to human beings, such as bisphenol A, phthalates, etc., and whether they will migrate or leach out. PET and PP are safe plastics that do not contain harmful substances and will not migrate or leach out. However, scientists have found that PET products may release carcinogens after 10 months of use.

Food containers have always been more popular, can organize different foods, when you choose a food box, you should choose a safe material, if you choose a toxic material, it is not good for the body. The common material of the food box on the market is pet and pp, some friends want to know which one is better. So which one is safe for pet and pp food boxes, and which one is suitable for food grade, pp or pet? Here is a detailed answer to this question.

Pet and pp are environmentally friendly materials, pp material melting point is relatively high, can reach 167 degrees Celsius, is the only kind of plastic that can be put into the microwave oven for heating, high temperature resistance is good, will not be deformed, will not produce harmful substances, but also can withstand low temperatures to minus 35 degrees. Often used in toys, washing machines, car parts, food boxes, food bags and so on.

If the pet material is heated to 70 degrees, it will be easy to deform, but also produce some harmful carcinogenic substances, which will affect human health. It is often used in packaging products, such as beverage bottles, edible oil bottles, flavor bottles, etc. It is also used in home appliances, machinery and other fields.

In summary, pet and pp food boxes are safe and suitable for food grade, are both can directly contact with food packaging. But the specific choice of use should be divided into circumstances, if you still need to heat the food in the food box, to choose pp material is good, if you do not need to heat, choose pet and pp food box can be.