Ultrasonic welding machine for medical blister dialysis paper

There is no problem with heat sealing. PET turns white easily, but its price is low. When the temperature is above 70 degrees, it is easy to release carcinogens. PETG is not raised for free. It has food-grade and medical-grade certification, but the price is much more expensive than that of pets. If it is domestic, the requirements are not so high, and the requirements of foreign markets, especially those in Europe and America, are definitely PETG.