一、PE袋是什么

1、 What is PE bag

袋是一种透明的塑料袋，可用于箱包、服装、电子产品等外包装，而其中PE是聚乙烯的简称，是乙烯经过聚合制成一种热塑性树脂……

Bag is a transparent plastic bag, which can be used for external packaging of luggage, clothing and electronic products. PE is the abbreviation of polyethylene, which is a thermoplastic resin made of ethylene through polymerization.

二、PE袋是特性

2、 PE bags are characteristic

袋外观透明，却又有雾化感；手感柔软，有耐性；耐低温功能好，防潮性好，但关于氧气、空气的阻隔率却低；能耐大多数酸碱的腐蚀（氧化性质的酸除外），在常温下不溶于一般的溶剂，吸水性小，电绝缘性能好； PE袋本身的印刷功能差，但通过改造或处理，可承印浅色，不建议大面积深色印刷。

The appearance of the bag is transparent, but it has a sense of atomization; Feel soft and patient; Good low temperature resistance and moisture resistance, but the barrier rate of oxygen and air is low; It can resist the corrosion of most acids and bases (except oxidizing acids), is insoluble in general solvents at room temperature, has small water absorption and good electrical insulation performance; The printing function of PE bag itself is poor, but through transformation or treatment, it can print light colors, and large-area dark printing is not recommended.

三、PE袋在食物包装常用的分类。

3、 PE bags are commonly used in food packaging.

依照生产工艺分可分为三类：高密度HDPE、密度低LDPE、线性密度低LLDPE。不一样的密度在食物包装袋中的应用侧重也各不相同，功能也有点差别。

According to the production process, it can be divided into three categories: high density HDPE, low density LDPE and low linear density LLDPE. The application of different density in food packaging bags is also different, and the functions are also a little different.

（1）高密度HDPE，也常叫做低压聚乙烯，耐油的功能体现良好，在油炸、肉制食物的包装袋中，可选用高密度HDPE作为热封层。

(1) High density HDPE, also known as low-pressure polyethylene, has a good oil resistance function. In the packaging bags of fried and meat foods, high-density HDPE can be used as the heat sealing layer.

（2）密度低LDPE，也常叫做高压聚乙烯，是PE材料中质地较软的一种材料。可独自作为包装袋，可以运用到肉、新鲜水果等冷藏冷冻食物的运输包装袋上，或者是食材的购物袋、保鲜袋等。

(2) Low density LDPE, also known as high-pressure polyethylene, is a soft material among PE materials. It can be used as a packaging bag alone, and can be applied to the transportation packaging bag of refrigerated and frozen food such as meat and fresh fruit, or the shopping bag and fresh-keeping bag of food materials.

（3）线性密度低LLDPE，外观与LDPE类似，耐冲击、耐低温耐性、耐疲劳、耐应开裂等，在冷冻食物包装袋：速冻水饺、冰淇淋、冻肉丸等包装袋。

(3) LLDPE with low linear density, similar to LDPE in appearance, impact resistance, low temperature resistance, fatigue resistance, stress cracking resistance, etc. in frozen food packaging bags: quick-frozen dumplings, ice cream, frozen meat balls and other packaging bags.

四、区别PE袋高密度与密度低的办法：

4、 Ways to distinguish between high density and low density PE bags:

（1）通过触感可以对比，两者柔软度不一样，密度低的质地更为柔软些。

(1) It can be compared by touch. The softness of the two is different, and the texture with low density is softer.

（2）用指甲在PE袋上划，不会留下划痕的便是高密度，会留下划痕的便是密度低的。。

(2) If you scratch on the PE bag with your fingernails, high density will not leave scratches, and low density will leave scratches..

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The above wonderful contents are provided by Jinan plastic bag. Please consult and pay attention //www.haaimobile.com