随着经济的发展和生活水平的提高,人们越来越重视 产品的质量。如果包装材料选择不当,就会使包装产品受 到一定量水蒸气的影响而造成损,降低了产品的性能,甚至完全失去使用价值,尤其在食品和医药行业最为明显。因此,对包装材料透湿性的要求也越来越高。 软包装材料的湿性 根据 With the economic development and improvement of living standards, people pay more and more attention to product quality. If improper packaging materials, packaging products will be affected by a certain amount of water vapor caused damage, reducing the performance of the product, or even completely lost the value, especially in the food and pharmaceutical industries most obvious. Therefore, the moisture permeability of the packaging material requirements are also getting higher and higher. Wet basis of flexible packaging materials