1、,Plastics,A 12-year-old girl who is from United Arab Emirates(阿联酋), got cancer after continuously using a mineral water bottle for 16 months.,Usually there is a a triangle with arrows at the bottom , which has a number in the triangle.,PET (polyethylene terephthalate)cream color or buff color, polym
2、er of highly crystallization, gloss smoothly surfacehas esterbond, be decomposed under acid, base and water vapor condition , good resistance to organic solvents. Deformation(变形) under 70 , harmful substances melt out .after using a plastic bottle for 10 months, it may release carcinogenic DEHP.,Min
3、eral water bottles, soda bottles etc,HDPE(high density polyethylene),white particles , non-toxic, tasteless, odorless , the melting point about 130 , relative density 0.941 0.960It has good heat resistance and cold resistance, chemical stability, also has high rigidity and toughness, good mechanical
4、 strength.,The polymer is not hygroscopic and have good water vapor resistance, can be used for packaging purposescommon white bottles, cleaning supplies, bath products.,PVC(polyvinylchloride),Yellowish Translucent cheap, Widely used , soften at about 80 , rarely used in food packaging,mainly for ra
5、incoat, building materials, plastic film, plastic boxes. Difficult to clean residue , do not recycle.High temperature and oil will lead PVC to release toxic gase(Vinyl chloride)and phthalate,LDPE(low density polythylene),Low crystallinity (45% -65%), low density (0.910-0.925), light, flexible, good
6、resistance against low temperature, resistance against impact. Be melt(热熔)When heated to 110 ,plastic wrap, plastic film，milk cartonjuice box etc. The harmful substance may cause cancer, birth defects disease (新生儿先天缺陷) disease. Do not wrap into the microwave oven,(polypropylene),Non-toxic, tasteless
7、, low density, better strength, stiffness(刚度), hardness, heat resistance than LDPE Common acid , alkali and organic solvents do not effect it Melting point as high as 167 ,Microwave Lunch Box (微波炉餐盒),cup etc,(Polystyrene ),colorless, transparent the glass transition temperature (玻璃转化温度)Is higher tha
8、n 100 , often used to make one-off containers(一次性容器)which need to understand the temperature of boiling water,Common bowl of instant noodles box(常见碗装泡面盒), snack box(快餐盒）,PC(Polycarbonate ),Made from Bisphenol A (双酚A ) and Diphenyl carbonate (碳酸二苯酯) Colorless transparent Thermal deformation temperature(热变形温度 ): 135C,Water bottle (水壶), space cup(太空杯), milk bottle,Paper glass,Used for cold food ,a layer of wax(蜡)inside of it For hot food or drink ,a layer of PE film.,
