Food grade blister packaging boxes are generally produced using PP material, but according to customer requirements and product characteristics. The selection of PP materials is also diverse, as PP materials are divided into PP natural color, PP natural color transparent, PP high transparency materials, and PP color materials. The product characteristics and uses produced from each PP material are different. Below, we will explain the characteristics and uses of the vacuum formed packaging boxes produced from each PP material one by one.
The general characteristic of natural PP material is that it can only withstand low temperatures, so the product can be refrigerated and is generally used for packaging meat and cooked food in supermarkets. The color can be PP natural white, or other colors of PP such as green or red.
Natural transparent material, also known as semi transparent PP material, has two properties: high temperature resistance and low temperature resistance. However, both low temperature and high temperature resistance are not very good. Therefore, we can only make some products that are not very strict with the requirements of low temperature and high temperature resistance, which are generally used for factory dumplings, Xiaolongbao, rice dumpling and other frozen packaging. This product cannot be processed at high temperatures using a micro boiler.
Highly transparent material, this PP material has good resistance to low and high temperatures, and can also be used for sealing processing. At the same time, the price of this material is also relatively high. So some products require both high and low temperature resistance. We usually use high transparency PP material to produce products, and products made of this PP material can be processed at high temperatures in micro boilers without any problem.
The material actually has a characteristic of low density, so after vacuum forming, the product is relatively thin compared to other materials such as PVC and PET. Therefore, when designing PP products, the material needs to be thicker than other materials.