Does it harmful to health when plastic packaging heating ?

When you bought breakfast in the vendor ,the milk that have been packed well soaked in the hot water, so that we can drink warm milk in winter. Most of us will heat drink or food by using microwave oven,but many food plastic packaging will faint a plastic taste after heating,is it these plastic taste is plasticizer or other addictives,whether it is unhealthy to humans body? Generally speaking , most of the food plastic products are made of polyethylene and polypropylene,so it is harmless when soaked in hot water. But in high temperature,some active additive components may break out. In the past 2 years,new packaging is gradually become popular. At present,there are several kinds of packing material are widely used in packaging. 1. PE(polyethylene) PE is the world's largest production of synthetic resin,and it also the largest consumption of plastic packaging material. PE products are divided into three types:low density,medium density,high density. HDPE are always made into plastic bottle or any other containers for its high degree of crystallinity,hardness,air tightness,chemical resitance properties. 2. PVC(polyvinyl chloride) PVC can be divided into three types:hard products,soft products,paste products. By using injection molding method ,we can produce PVC seamless bottle ,it is suitable for packing cola,soft drink.By using extrusion blow molding method ,we can produce PVC bottle that suitable for packing fruit juice and mineral water. 3. PP (polypropylene): The development of transparent PP bottles are sell well at home and abroad in recent years. With the modifier, the successful development of nucleating agent, in the ordinary PP added 0.1 per cent of 0.4% sorbitol shrinkage xylene (benzaldehyde) nucleating agent and the production of high transparent PP bottles can be widely used in need thermal sterilization such as concentrated juice needed hot filling beverage packaging, the price is suitable, to withstand pressure and temperature, PS, ABS, pet, PE bottle of new competitors.