With the gradual growth of the takeout market, the competition of takeout merchants extends from whether it is good quality and cheap to takeout speed, takeout packaging and so on. Indeed, among all kinds of takeout food, exquisite packaging is indeed easier to attract our attention. But is it safe to pack beautifully? Most people think that plastic lunch box is just a container, but they often ignore whether it is healthy and harmful to human body. Today, Yinuo packaging will introduce some common sense of marking to distinguish the purpose of disposable packing boxes.

1、数字“1”，由PET制成，主要应用于矿泉水瓶、碳酸饮料瓶等;耐热至65摄氏度，耐冷至-20摄氏度。

1. The number "1", made of pet, is mainly used in mineral water bottles, carbonated beverage bottles, etc; Heat resistance to 65 ° C and cold resistance to - 20 ° C.

2、数字“2”，HDPE制成，主要用于制作清洁用品、沐浴产品的包装;

2. Digital "2", made of HDPE, mainly used for making the packaging of cleaning products and bath products;

3、数字“3”，PVC制成，主要用于制作一些装饰材料，很少用于食品包装;耐热至81摄氏度，需注意：不可用于食品包装。

3. The number "3", made of PVC, is mainly used to make some decorative materials, rarely used for food packaging; Heat resistant to 81 ℃, note: it can not be used for food packaging.

4、数字“4”，由LDPE制成，主要用于制作保鲜膜、塑料膜;耐热至110摄氏度，需注意的是用微波炉加热时别用保鲜膜包裹食物。

4. The number "4", made of LDPE, is mainly used to make fresh-keeping film and plastic film; Heat resistance to 110 degrees Celsius, it should be noted that do not wrap food with plastic wrap when heating in microwave oven.

5、数字“5”，PP制成，主要用于豆浆瓶、优酪乳瓶、果汁饮料瓶、微波炉餐盒，需注意耐高温至120摄氏度，耐低温至-20摄氏度

5. The number "5", made of PP, is mainly used for soymilk bottles, yogurt bottles, fruit juice beverage bottles and microwave oven lunch boxes. Attention should be paid to high temperature resistance to 120 ℃ and low temperature resistance to - 20 ℃

6、数字“6”，由PS制成，一般用于碗装泡面盒、快餐盒;耐温至70摄氏度;

6. The number "6", made of PS, is generally used for bowl instant noodle boxes and fast food boxes; Temperature resistance to 70 ℃;

7、数字“7”，PC制成，一般用于水壶、水杯、奶瓶;

7. The number "7", made of PC, is generally used for kettle, water cup and milk bottle;

由上我们可以看出，标号1-4的打包盒一般是不用于乘载食物的，一般用来打包的餐盒以及热饮杯大多是使用PVC塑料5号的PP一次性打包盒，需要注意的是不少餐厅使用的打包盒是6号的PS塑料，而PS塑料的耐热度只有70摄氏度，所以要尽量避免使用6号PS做成的打包盒去打包滚烫的食物，我们在点餐的时候或者点外卖的时候一定要注意是使用什么型号的PVC塑料打包盒，毕竟这些日常的事情也与我们的健康息息相关。

From the above, we can see that the packing boxes labeled 1-4 are generally not used to carry food. Most of the lunch boxes and hot drink cups used for packing are PVC plastic No. 5 PP disposable packing boxes. It should be noted that many restaurants use No. 6 PS plastic, while the heat resistance of PS plastic is only 70 ℃, Therefore, we should try to avoid using the packing box made of No. 6 PS to pack hot food. We must pay attention to the model of PVC plastic packing box when ordering meals or takeout. After all, these daily things are also closely related to our health.