Composite bag, I believe this name should not be unfamiliar to you. It is often mentioned in previous articles of Xiaobian, and it can be seen everywhere in our daily life. But Xiaobian believes that most businesses know nothing about composite bags except their names. Take the difference between composite bags and ordinary plastic bags that Xiaobian will talk about today. Do you know the difference between composite bags and ordinary plastic bags? I don't know. Let's look down.

复合袋，为什么要叫复合袋呢？那是因为这类袋子，是由不同的材料复合制作而成。大家都知道普通的塑料袋，比如PE袋，那么很明显它的制作材料就PE。而复合袋不同，它是由多层复合而成，比如说PE+PO或者PE+其他塑料材料。这种袋子看似只有一层其实，其实这一层可能是由2层或者3层或者4层或者更多层不同的材料复合而成。

Compound bag, why is it called compound bag? That's because these bags are made of different materials. We all know that ordinary plastic bags, such as PE bags, are obviously made of PE. Unlike the composite bag, it is made of multi-layer composite, such as PE + PO or PE + other plastic materials. This kind of bag seems to have only one layer. In fact, this layer may be composed of two or three or four or more layers of different materials.

除了可以由不同的塑料材料组成之外，复合袋也可以复合纸、布和其他包装材料。比如说下面这款袋子就是PE和牛皮纸复合而成。

In addition to being composed of different plastic materials, composite bags can also be made of paper, cloth and other packaging materials. For example, the following bag is made of PE and kraft paper.

或许这样说大家比较好理解，现有一个PE材料的塑料袋和一个PO材料的塑料袋，把这两个塑料袋套在一起使用，这就是复合袋。

It is better to use the plastic bag and the plastic bag together.