在包装工业发展的基础上，物品的包装也得到相应的发展。从简单纸包装，到单层塑料薄膜包装，发展到复合材料的广泛使用。复合膜能使包装内含物具有保湿、保香、美观、保鲜、避光、防渗透、延长货架期等特点，因而得到迅猛发展。

On the basis of the development of the packaging industry, the packaging of goods has also undergone corresponding development. From simple paper packaging to single-layer plastic film packaging, to the widespread use of composite materials. Composite films have developed rapidly due to their ability to provide moisture retention, aroma retention, aesthetics, freshness, light resistance, penetration resistance, and extended shelf life to the contents of packaging.

复合塑料包装袋比传统包装袋实用性要更好一些，防水性、耐热性都要远远超过普通包装袋。下面就让我们来看看济南复合塑料袋的组成材料有什么吧。

Composite plastic packaging bags are more practical than traditional packaging bags, and their waterproofing and heat resistance far exceed those of ordinary packaging bags. Let's take a look at the composition materials of Jinan composite plastic bags.

复合塑料包装袋是由两种或两种以上塑料原材料，经过一次或多次复合工艺而组合在一起，从而构成具有特定功能的塑料复合袋。一般可分为基层、功能层和热封层。基层主要起美观、印刷、阻湿等作用。如BOPP、BOPET、BOPA、MT、KOP、KPET等;功能层主要起阻隔、避光等作用，如VMPET、AL、EVOH、PVDC等;热封层与包装物品直接接触，起适应性、耐渗透性、良好的热封性，以及透明性、开口性等功能，如LDPE、LLDPE、MLLDPE、CPP、VMCPP、EVA、EAA、E-MAA、EMA、EBA等。

Composite plastic packaging bags are plastic composite bags that are composed of two or more plastic raw materials and are combined through one or more composite processes to form a specific functional plastic composite bag. Generally, it can be divided into base layer, functional layer, and heat sealing layer. The grassroots mainly plays a role in aesthetics, printing, and moisture resistance. Such as BOPP, BOPET, BOPA, MT, KOP, KPET, etc; The functional layer mainly plays a role in blocking and avoiding light, such as VMPET, AL, EVOH, PVDC, etc; The heat sealing layer is in direct contact with packaging materials, providing adaptability, permeability resistance, good heat sealing performance, as well as transparency and opening properties, such as LDPE, LLDPE, MLLDPE, CPP, VMCPP, EVA, EAA, E-MAA, EMA, EBA, etc.

复合塑料包装袋所牵涉的原材料种类较多，性质各异，哪些塑料材料可以结合或不能结合，用什么东西黏合等，问题比较多而复杂，所以必须对塑胶袋原材料精心选择，方能获得理想的效果。选择的原则如下：

Composite plastic packaging bags involve a wide range of raw materials with varying properties, including which plastic materials can or cannot be combined, and what to use for bonding. There are many and complex issues, so it is necessary to carefully select the raw materials for plastic bags in order to achieve the desired results. The recommended principles for selection are as follows:

A、明确包装对象和要求;

A. Clarify packaging objects and requirements;

B、选用合适的塑料原材料和加工方法;

B. Select appropriate plastic raw materials and processing methods;

C、采用恰当的粘合剂或层合原料。

C. Use appropriate adhesives or laminating materials.

复合塑料袋的组成材料等相关内容就讲解到这里了，希望能够给您好的帮助，更多事项就来我们网站http://www.scuhtg.com咨询！

That's all for the explanation of the composition materials and related content of composite plastic bags. I hope it can be helpful to you. For more information, please come to our website http://www.scuhtg.com consulting service