As the name implies, composite bag is a bag made of two or more materials. Thus, the high-performance packaging which can give full play to the advantages of each composite material can be realized. It can collect the advantages of each layer of film, overcome their disadvantages, and obtain ideal packaging materials after compounding, which can meet the requirements of a variety of products.

一、济南复合袋特点：

1、 Composite bag features:

1.质量轻、透明度高、柔软、防氧化；

1. Light weight, high transparency, softness and oxidation resistance;

BOPP/CPP复合袋可保持较高的透明度，同时又能更好的防尘防潮。适用于各种饼干、糖果等等食品的干燥包装。但是耐寒耐热性能较差，不能当做冷藏袋亦不可高温加热。

BOPP / CPP composite bag can maintain high transparency, and at the same time, it can better prevent dust and moisture. It is suitable for dry packaging of all kinds of biscuits, sweets and other foods. However, it has poor cold and heat resistance, so it can not be used as a cold bag or heated at high temperature.

2.具有良好的气密性和热封性；

2. It has good air tightness and heat sealing;

PET/PE复合袋防氧化性能好，气密性和热封性更佳，并且复合材料都是的材料，可应用在各种充气食品包装，日用生活包装等等

PET / PE composite bag has good anti-oxidation performance, better air tightness and heat sealing performance, and the composite materials are safe and non-toxic materials, which can be used in various inflatable food packaging, daily life packaging, etc

3.能防潮、防气、防紫外线、耐热性、耐寒性能优良；

3. It is moisture-proof, gas proof, UV proof, heat-resistant and cold resistant;

BOPA/LDPE复合袋耐高温，无味，防潮，耐油，但是透明度很差。主要应用在熟食品、速冻食品等包装，可以加热、冷藏、蒸煮等等。

BOPA / LDPE composite bag is heat-resistant, non-toxic, tasteless, moisture-proof, oil-resistant, but its transparency is poor. Mainly used in cooked food, frozen food and other packaging, can be heated, refrigerated, cooking and so on.

4.还有良好的尺寸稳定性，化学性质稳定，有优良的耐化学腐蚀性和防油脂性；

4. It has good dimensional stability, chemical stability, excellent chemical corrosion resistance and grease resistance;

5.有抗撕裂、耐腐蚀、抗冲击、耐摩擦、防老化性；

5. It has tear resistance, corrosion resistance, impact resistance, friction resistance and aging resistance;

复合袋均由两种以上的材料复合而成，抗穿刺性要远远高于普通的单层包装袋。

Composite bags are made of more than two kinds of materials, and the puncture resistance is much higher than the ordinary single-layer packaging bags.

6.机械加工适性优良

6. Good machining adaptability

二、济南复合袋的应用

2、 Application of compound bag

    复合包装袋装主要用于服饰、五金、食品、医疗、化妆品、饮料等产品的包装，近几年，全球对复合包装袋的需求一直保持着迅猛的发展态势。复合包装袋所能采用的基材种类繁多，常用的基材有：高密度、中密度、低密度聚乙烯薄膜（HDPE、MDPE、LDPE）、拉伸和未拉伸聚丙烯薄膜（BOPP、CPP）、聚酯薄膜（PET）、聚氯乙烯薄膜（PVC）、尼龙膜（NY）等。

Composite packaging bags are mainly used for the packaging of clothing, hardware, food, medical treatment, cosmetics, beverages and other products. In recent years, the global demand for composite packaging bags has maintained a rapid development trend. There are many kinds of base materials that can be used in composite packaging bags. The common base materials are: high density, medium density, low density polyethylene film (HDPE, MDPE, LDPE), stretched and UN stretched polypropylene film (BOPP, CPP), polyester film (PET), polyvinyl chloride film (PVC), nylon film (NY), etc.

常见的复合包装袋类型有：纸/塑复合、塑/塑复合、铝/塑复合等。复合的基材层数可以是两层、三层、四层、五层甚更多。按照复合塑料薄膜基材的种类和厚薄、组合的层数和顺序，以及复合的方法，可以构成许多种类的复合包装袋。

Common types of composite packaging bags are: paper / plastic composite, plastic / plastic composite, aluminum / plastic composite, etc. The number of composite substrate layers can be two, three, four, five or more. According to the type and thickness of the composite plastic film substrate, the number and order of the combined layers, and the composite method, many kinds of composite packaging bags can be formed.

    时今日，拥有个性化的包装也是目前很多行业亟需转变的方向，从而有助于企业了解大环境下目标消费者对体验式的消费需求，寻找到他们所想看见的画面场景，并且结合自身的调性，进行创意化包装。而济南复合袋的种种特性，可以深度满足企业的需求。

Today, the personalized packaging is also the direction that many industries need to change, so as to help enterprises understand the target consumers' demand for experiential consumption under the environment, find the picture scenes they want to see, and combine the tonality of their own brand to carry out creative packaging. The characteristics of composite packaging bags can meet the needs of enterprises.