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塑料瓶的底部都有一个带箭头的三角形，三角形里面有一个数字，以下这些塑料瓶底三角形中的数字，指代的是该瓶子包含的成分和该成分对人体健康的影响——
1——PET聚对苯二甲酸乙二醇酯
常见于矿泉水瓶、碳酸饮料瓶等。温度达到70℃时易变形，且有对人体有害的物质融了。1号塑料品使用10个月后，可能释放出致癌物DEHP。这类瓶子不能放在汽车内晒太阳，不能装酒、油等物质。
2——HDPE高度密聚乙烯
常见于白色药瓶、清洁用品、沐浴产品。不要用来做水杯，或者做储物容器装其他物品。
3——VC聚氯乙烯
常见于雨衣、建材、塑料膜、塑料盒等。可塑性优良，价钱便宜，故使用很普遍，耐热至81℃时达到顶点，高温时容易产生有害物质，很少被用于食品包装。难清洗、易残留，不要循环使用。
4——PE聚乙烯
常见于保鲜膜、塑料膜等。高温时有有害物质产生，有毒物质随食物进入人体后，可能引起乳腺癌、新生儿先天缺陷等疾病。
5——PP聚丙烯
常见于豆浆瓶、优酪乳瓶、微波炉餐盒，熔点高达167℃，是唯一可以放进微波炉的塑料制品，可在小心清洁后重复使用。需要注意的是，有些微波炉餐盒，盒体以5号PP制造，但盒盖却以1号PET制造，由于PET不能抵受高温，故不能与盒体一并放进微波炉。
6——PS聚苯乙烯
常见于碗装泡面盒、快餐盒。不能放进微波炉中，以免因温度过高而释放出有害化学物质。避免用快餐盒打包滚烫的食物，别用微波炉煮碗装方便面。
7——PC其他类
常见于水壶、太空杯、奶瓶。百货公司常用这些材质的水杯当赠品。不过，这种材质的水杯很容易释放了有毒物质双酚A，对人体有害。另外，使用这种水杯时不要加热，不要在阳光下晒。
历数塑料瓶“四宗罪”
1、在城市、旅游区、水体和道路旁散落的废旧塑料瓶给人们的视觉带来不良刺激，影响城市、风景点的整体美感，破坏市容、景观，由此造成“视觉污染”。
2、废旧塑料瓶进入环境后，由于其很难降解，造成长期的、深层次的生态环境问题。废旧塑料瓶混在土壤中，影响农作物吸收养分和水分，将导致农作物减产。
3、抛弃在陆地或水体中的废旧塑料瓶，被动物当作食物吞入，导致动物死亡。在动物园、牧区和海洋中，此类情况已屡见不鲜。
4、混入生活垃圾中的废旧塑料瓶很难处理：填埋处理将会长期占用土地，混有塑料的生活垃圾不适用于堆肥处理，分拣出来的废塑料也因无法保证质量而很难回收利用。
The bottom of plastic bottles have a triangle with arrows, triangles which have a number, following plastic bottom triangle figures refer to the bottle containing the composition and the composition on human health -
1 - PET Polyethylene terephthalate common in mineral water bottles, soda bottles. Temperature reaches 70 ℃, deformation, and harmful substances are melted. 1 plastic materials used for 10 months, may release carcinogenic DEHP. Such bottles can not be placed in the car the sun, can not hold wine, oil substances.
2 - HDPE high density polyethylene common in white bottles, cleaning supplies, bath products. Should not be used to make glass, or storage containers made of other materials.
3 - VC PVC common in raincoats, building materials, plastic film, plastic boxes. Plasticity good, cheap, so use a very common heat-resistant to 81 ℃ and reached peak temperatures easily lead to harmful substances, are rarely used in food packaging. Difficult to clean, easy residues, do not recycle.
4 - PE PE is common in plastic wrap, plastic film. Harmful substances produced when high temperature, toxic substances enter the body with food, may cause cancer, birth defects and other neonatal diseases.
5 - PP Polypropylene common in milk bottles, yogurt bottles, microwave meal, the melting point as high as 167 ℃, is the only place in microwave plastic products can be reused after careful cleaning. Note that some microwave lunch box, box with 5 PP production, but the lid is to 1, PET manufacturing, because PET can not withstand high temperatures, it can not be put in microwave oven with box body.
6 - PS Polystyrene boxes common in bowl of instant noodles, snack box. Can not be put in the microwave oven, the temperature is too high to avoid the release of harmful chemicals. Avoid packaged snack foods hot, do not microwave cooking instant noodles bowl.
7 - PC other types of common water bottle, space cup, bottle. These glass materials used in department stores as gifts. However, this material's glass is easy to release the toxic substance bisphenol A, harmful. In addition, the use of this glass Do not heat, not drying in the sun.
Enumerating the plastic bottle "Four Sins"
1, in the city, tourism, water and roads next to the scattered waste plastic bottles to stimulate people's visual adversely affect the city, the overall beauty of scenic spots, damage amenities, landscape, and the resulting "visual pollution."
2, waste plastic bottles into the environment, due to its very difficult to degrade, resulting in long-term, in-depth ecological and environmental problems. Waste plastic bottles mixed in the soil, affecting crops absorb nutrients and water, will lead to crop failures.
3, abandoned on land or water in the waste plastic bottles, animal as food ingestion, leading to animal death.At the zoo and pastoral areas and the ocean, such cases are not uncommon.
4, mixed with solid waste in the waste plastic bottles is difficult to handle: Landfill will be long-term occupation of land, mixed with a plastic garbage does not apply to composting, sorting out of waste plastic is also very difficult because of the quality of recovery can not be guaranteed use.