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塑料袋该如何鉴别优劣?
发布于:2020/06/20 人们在日常生活中常常会用到各种各样塑料袋来盛装食品、存储物品以及垃圾等,但塑料袋不仅本身会释放有害气体,尤其是盛装熟食时,常常会发生变质,从而释放各种对人体有害物质,特别是儿童由于处在生长发育关键时期,影响尤为突出。学会鉴别塑料袋,不仅可以物尽其用,还可以避免受到不必要的伤害。
People often use a variety of plastic bags to contain food, storage items and garbage in their daily life, but plastic bags not only release harmful gases, especially when they are filled with cooked food, they often deteriorate, so as to release various harmful substances to human body, especially children, because they are in a critical period of growth and development, the impact is particularly prominent. Learn to identify plastic bags, not only to make the best use of everything, but also to avoid unnecessary injury.
有颜色的塑料袋大都使用回收料制作而成,在重新合成塑料袋时都会经过染色,这类塑料袋会含有各种有害物质,特别是黑色塑料袋,这类塑料袋不适合盛装食品等。
Most colored plastic bags are made of recycled materials. They will be dyed when they are re synthesized. Such plastic bags will contain various harmful substances, especially black plastic bags, which are not suitable for containing food.
透明塑料袋主要有聚乙烯(PE)塑料袋和聚氯乙烯(PVC)塑料袋,盛装食品的主要由PE制成,而PVC本身也没有毒性,但在加工过程中根据用途不同,往往会添加各种添加剂,从而产生毒性,鉴别时PE由于密度较水小,沉在水底会浮上来,而PVC密度较水要大,沉在水底不会浮起来,通过沉在水中可以将两者区分开来,同时PE易于燃烧,火焰呈黄色,PVC不易燃烧,燃烧是火焰呈绿色,同时有刺激性气味。目前早餐店用的一次性透明塑料袋大多是PVC塑料袋,相关资料显示,PVC塑料袋在温度超过50度时就会释放出重金属等有害物质,超过80度时就会发生溶解,同时酒精和油脂会溶解PVC中的有害物质,所以也不适宜盛装此类食品。
Transparent plastic bags mainly include polyethylene (PE) plastic bags and polyvinyl chloride (PVC) plastic bags. The food is mainly made of PE, and PVC itself has no toxicity. However, in the process of processing, various additives are often added according to different purposes, resulting in toxicity. In the identification, PE will float on the bottom of the water due to its lower density, while PVC will float on the bottom of the water due to its higher density It will not float up, and can be distinguished by sinking in water. At the same time, PE is easy to burn, the flame is yellow, PVC is not easy to burn, the flame is green, and there is an irritant smell. At present, most of the disposable transparent plastic bags used in breakfast shops are PVC plastic bags. According to relevant data, when the temperature of PVC plastic bags exceeds 50 degrees, heavy metals and other harmful substances will be released, and when the temperature exceeds 80 degrees, they will dissolve. At the same time, alcohol and grease will dissolve the harmful substances in PVC, so they are not suitable to contain such food.
即使是食品级塑料袋也并非都可以在高温环境下使用,同样会有塑料制剂溢出,不利于人体健康,而此类塑料袋即使提供商家也很难向普通消费者说明,到底耐多少度的高温,而消费者也很难验证自己所用塑料袋到底能耐多少度高温,所以更稳妥的办法还是选用玻璃或陶瓷制品来盛装各类食品。
Even food grade plastic bags can not be used in high temperature environment, and there will also be overflow of plastic agents, which is not conducive to human health. However, even if such plastic bags are provided by businesses, it is difficult to explain to ordinary consumers how much high temperature they can withstand, and it is also difficult for consumers to verify how much high temperature they can withstand. Therefore, the safest way is to choose glass Glass or ceramic products to contain all kinds of food.
一次性塑料袋的危害是什么?
What are the hazards of disposable plastic bags?
1、塑料袋本身会释放有害气体。特别是熟食,用塑料袋包装后,常常会变质。变质的食品对儿童健康发育的影响尤为突出。
1. Plastic bags themselves release harmful gases. Especially cooked food, after being packed in plastic bags, often deteriorates. The effect of spoiled food on children's healthy development is particularly prominent.
2、塑料袋回收价值较低,在使用过程中除了散落在城市街道、旅游区、水体中、公路和铁路两侧造成“视觉污染”。
2. The recycling value of plastic bags is relatively low, which causes "visual pollution" in the process of use except for scattered in urban streets, tourist areas, water bodies, roads and railways.
3、废塑料随垃圾填埋进入生活垃圾中的废塑料制品如果将其填埋,200年的时间才能将其降解。而且,塑料袋以石油为原料,不仅消耗了大量资源,还不能被分解,埋在地下会污染土地、河流。
3. The waste plastic products which enter into the domestic garbage with the landfill can be degraded in 200 years if they are landfilled. Moreover, plastic bags, which use oil as raw material, not only consume a lot of resources, but also can not be decomposed. Buried underground will pollute land and rivers.
4、影响农业发展。废塑料制品混在土壤中不断累积,不仅会占用大量土地,而且被占用的土地长期得不到恢复,影响土地的可持续利用,影响农作物吸收养分和水分,导致农作物减产。
4. Affecting agricultural development. The continuous accumulation of waste plastic products mixed in the soil will not only occupy a large amount of land, but also the occupied land will not be restored for a long time, affecting the sustainable use of land, affecting the absorption of nutrients and water by crops, leading to crop yield reduction.
5、焚烧塑料袋会产生有毒气体,会使一小部分土地不能种植,所以都选在没有人住的地方焚烧。焚烧塑料袋产生的浓烟里会产生致癌物质,对人的身体极为不利。
5. Burning plastic bags will produce toxic gases, which will make a small part of the land unable to be planted, so they will be burned in places where no one lives. The smoke produced by burning plastic bags will produce carcinogens, which is extremely harmful to people's health.
6、对动物生存构成威胁。抛弃在陆地上或水体中的废塑料制品,被动物当作食物吞入,导致动物死亡。这样的事在动物园、牧区、农村、海洋中屡见不鲜。
6. It is a threat to the survival of animals. Waste plastic products discarded on land or in water are swallowed by animals as food, resulting in animal death. Such things are common in zoos, pastoral areas, rural areas and oceans.
7、此外,邻苯二甲酸类衍生物中很多是脂类,不易溶于水,但能溶于加温过的食品或脂肪性食品。因此特别提醒大家,如果用塑料袋作食物包装材料,使用时要特别小心,尽量不要用其来盛装热饭菜等食物。
7. In addition, many of the phthalate derivatives are lipids, which are insoluble in water, but soluble in heated food or fatty food. Therefore, I would like to remind you that if you use plastic bags as food packaging materials, you should be very careful when using them, and try not to use them to contain hot food and vegetables.
8、在农贸市场上,摊主往往用很厚的黑色塑料袋盛装宰杀的禽鱼等食品。这种塑料袋是经过多次回收再加工得产品,内含多种有毒的溶解剂及其他有毒物,很容易掺入到刚宰杀的动物体内,对人体也会造成相应的损害。
8. In the farmer's market, stall owners often use thick black plastic bags to hold slaughtered poultry, fish and other food. This kind of plastic bag is a product that has been recycled and reprocessed for many times. It contains a variety of toxic dissolving agents and other poisons. It is easy to be mixed into the newly slaughtered animals and will cause corresponding damage to human body.
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