High heat-resistant plastic packaging material

Heat-resistant plastic flexible packaging materials have previously been used for retort sterilization, to meet the retort sterilization requirements of packaging at 120 ° C, 10 ~ 20mln retort sterilization or heating, the appearance of the shape, quality have no significant changes in the packaging of food storage During the process, there were no cases of container damage, leakage of contents, secondary contamination of microorganisms, and deterioration of the contents by light and heat. Basically, a light-blocking aluminum foil is used as an intermediate layer, a high-barrier plastic PA and PET are used as the outer layers, and a heat-sealing PE and PP inner layer multi-layered composite cooking film is used most often for cooking bags. Some new multi-layer composite materials such as EVOH, PVDC, MXD6, and silicon oxide evaporated films containing high barrier materials are also being used.

With the increasing popularity of microwave ovens and microwave ovens, there is an increasing demand for packaging containers suitable for use in induction cookers and microwave ovens. The requirement for microwave ovens and microwave ovens for packaging materials is that they should not be deformed or damaged at high temperature, and the contents (additives) should not be volatilized. In particular, the heating characteristics of microwave ovens do not allow metal materials in packaging materials. This limits the The use of aluminum foil as the middle layer, PE, PP as the inner cooking bag. Therefore, a packaging container made of PP, a multilayered composite material in which inorganic matter is filled with PP, and a crystalline polyester (CPET) sheet is often used. New heat-resistant packaging materials that are resistant to higher temperatures, such as polysulfone films, polyetherimides, and polytetramethylpentene (TPX)/paperboard, have also been developed. They all can withstand temperatures above 180°C. To meet the electromagnetic oven, microwave oven on the packaging materials.