PURETHERMO

Since transparency is created by compressing PP with a belt and rolled at low temperature from a molten condition during the quenching film process by means of the belt process, PURETHERMO is a transparent PP sheet without a nucleating agent.

To perform quenched solidification of plastics from a molten condition with the direct belt quenching process, film is formed in a low crystal condition, which is not applicable to conventional PP. Therefore, the softening temperature of the sheet is decreased enabling low-temperature thermoforming. The thermoforming temperature range is thereby extended and problems such as difficulties in thermoforming, which have been a challenge of transparent PP are solved.

Fine crystallization is promoted by reheating during the thermoforming process which improves the stiffness over that of typical PP materials, while maintaining high transparency.

PP exhibits superior heat resistance when compared to other general-purpose plastics.

For a more detailed product description including technical information, please refer to the following link.

Heat resistance of PP, features and feasibility of high transparency and easy-thermoforming sheet, PURETHERMO, by maintaining transparency using the belt process technology.

Most packed lunches and foods sold in convenience stores and supermarkets are heated in a microwave oven before being eaten. However, it has been argued that existing food packages can become deformed when heated at the stores. Since the temperature of any foods with a high oil percentage increases to more than 100ºC, packing materials are required to be thermal-proofed. PURETHERMO is widely employed because of its heat resistance and the fact that it has the same thermoformability as existing products.