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、濟南復合袋特點：

1、 Composite bag features:

1.質量輕、透明度高、柔軟、防氧化；

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

BOPP/CPP復合袋可保持較高的透明度，同時又能更好的防塵防潮。適用于各種餅干、糖果等等食品的干燥包裝。但是耐寒耐熱性能較差，不能當做冷藏袋亦不可高溫加熱。

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.具有良好的氣密性和熱封性；

2. It has good air tightness and heat sealing;

PET/PE復合袋防氧化性能好，氣密性和熱封性更佳，并且復合材料都是安全無毒的材料，可應用在各種充氣食品包裝，日用生活包裝等等

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、防氣、防紫外線、耐熱性、耐寒性能優良；

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

BOPA/LDPE復合袋耐高溫，無毒無味，防潮，耐油，但是透明度很差。主要應用在熟食品、速凍食品等包裝，可以加熱、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.還有良好的尺寸穩定性，化學性質穩定，有優良的耐化學腐蝕性和防油脂性；

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

5.有抗撕裂、耐腐蝕、抗沖擊、耐摩擦、防老化性；

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

復合袋均由兩種以上的材料復合而成，抗穿刺性要遠遠高于普通的單層包裝袋。

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.機械加工適性優良

6. Good machining adaptability

二、濟南復合袋的應用

2、 Application of compound bag

    復合包裝袋裝主要用于服飾、五金、食品、醫療、化妝品、飲料等產品的包裝，近幾年，全球對復合包裝袋的需求一直保持著迅猛的發展態勢。復合包裝袋所能采用的基材種類繁多，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）、尼龍膜（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.

常見的復合包裝袋類型有：紙/塑復合、塑/塑復合、鋁/塑復合等。復合的基材層數可以是兩層、三層、四層、五層甚至更多。按照復合塑料薄膜基材的種類和厚薄、組合的層數和順序，以及復合的方法，可以構成許多種類的復合包裝袋。

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.

    時至今日，擁有個性化的包裝也是目前很多行業亟需轉變的方向，從而有助于企業了解大環境下目標消費者對體驗式的消費需求，尋找到他們所想看見的畫面場景，并且結合自身品牌的調性，進行創意化包裝。而濟南復合袋的種種特性，可以深度滿足企業的需求。

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.