PE stretch film is a new type of packaging material in the logistics industry, which can be widely used for centralized packaging of various goods. It is widely used in foreign trade exports, papermaking, hardware, plastic chemical, building materials, food and pharmaceutical industries. What are the temperature requirements for producing PE stretch film? Today, Jiangsu Shenkai Packaging will introduce to you: Aluminum plastic vacuum bags
In the production process of PE stretch film, it can be divided into the following two stages according to temperature:
1. Heating stage
On the premise of ensuring that the PE stretch film blank is not affected by steam, the heating time should be shortened as much as possible, as long as steam is continuously and uniformly injected into the curing room for 1-1.5 hours.
2、恒温阶段
恒温阶段是坯体发生水化和水热合成而使强度增长的重要阶段。随着恒温时间的延长，水化物越聚越多，强度增长也越来越快。但恒温达到一定时间后，强度增长开始变慢。不同原料配比，不同生产工艺，所生产出来的加气块坯，都有一个与其相对应的恒温时间。
例如，在96～100 ℃的湿热条件下，恒温时间春、秋季为8小时，夏季7小时，冬季10小时。降温阶段当生产量大，养护室空间不够用时，应打开养护室门，采取快速降温，会导致PE拉伸膜体表里间产生温差应力，使表层受拉，易形成微裂纹。所以，一定要控制降温速度，每30分钟的降温不应超过10℃；养护室内外的温度差不大于30℃，成品PE拉伸膜方可出室。
以上就是PE拉伸膜在制作中对温度的大致要求。在日常生产时，严格控制PE拉伸膜的制作温度，是保证PE拉伸膜产品具有拉伸强度高，延伸率大、自粘性好，透明度高等特点并广泛应用于各行各业的必要条件。
