影响自封袋缩水率的影响要素有哪些？

一、自封袋自身构造的危害

1、 The hazards of the self sealing bag's own structure

同一自封袋中，厚度比较小的方位的缩水率要低于厚度比较大部位，避开镶件方位的缩水率远大于挨近镶件方位的缩水率，笔直在流动性方位与流动性的方向缩水率是有区别的，一般情况下流动性方位缩水率超过笔直在流动性的方向缩水率，自封袋遭受阻拦的方向缩水率会比无阻拦的方向缩水率要低。

In the same self sealing bag, the shrinkage rate in the direction with smaller thickness is lower than that in the direction with larger thickness. The shrinkage rate in the direction avoiding the insert is much higher than that in the direction close to the insert. There is a difference in shrinkage rate between the flow direction and the flow direction in the straight direction. Generally, the shrinkage rate in the flow direction is higher than that in the straight direction, and the shrinkage rate in the direction where the self sealing bag is obstructed will be lower than that in the unobstructed direction.

二、质料对自封袋缩水率发生的影响

2、 The influence of materials on the shrinkage rate of self sealing bags

用不同质料制作的自封袋的缩水率也是不一样的，但是应用相同资料制作的不一样出产批次自封袋缩水率也有所不同，主要是得到了出产加工加工进程发生的影响，结晶型塑料的缩水率远大于不定形塑料，流通性差塑胶成型缩短率大，流通性好塑料成型缩短率小，若是在塑胶里加入填充物也会导致成形的塑料缩短率显着下降，不含有填充料的塑料出产成形后缩水率更强。

The shrinkage rate of self sealing bags made from different materials is also different, but the shrinkage rate of self sealing bags made from the same materials in different production batches also varies. This is mainly due to the impact of the production and processing process. The shrinkage rate of crystalline plastics is much higher than that of amorphous plastics, with poor flowability. Plastic with good flowability has a larger shrinkage rate, while plastic with good flowability has a smaller shrinkage rate. If fillers are added to plastic, it will also lead to a significant decrease in the shrinkage rate of formed plastics. Plastics without fillers have a stronger shrinkage rate after production.

三、和压力环境温度对自封袋缩水率发生的影响

3、 The influence of pressure and ambient temperature on the shrinkage rate of self sealing bags

工作压力太高会使自封袋的密封性进步，造成缩水率削减，假设进步出产制作自封袋的质料温度，会使自封袋的吸水膨胀，根据工作压力入型原资料削减，促进缩水率扩大，但是质料的温度上升会使黏度变下，黏度缩小会使凹模内压力增加，促进自封袋额缩水率削减，因此充分考虑，危害自封袋的缩水率的影响要素在于和压力质料环境温度二者综合危害。

Excessive work pressure can improve the sealing performance of self sealing bags, leading to a reduction in shrinkage rate. Assuming that the temperature of the materials used to produce self sealing bags is increased, it will cause water absorption and expansion of the self sealing bags. According to the original data of the work pressure, it will be reduced to promote an increase in shrinkage rate. However, an increase in temperature of the materials will cause a decrease in viscosity, and a decrease in viscosity will increase the pressure inside the mold, promoting a reduction in shrinkage rate of the self sealing bags. Therefore, it is fully considered that the factors affecting the shrinkage rate of self sealing bags are the combined harm of the pressure material environment temperature.

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