常见检测自封袋密封性方法

来源：http://www.sztensun.com/ 日期：2024-03-25

自封袋虽然非常方便，但是密封性能也很重要。在设计自封袋时，需要充分考虑每层材料的性能和厚度，以获得足够的阻隔性能。检测自封袋密封性能的常用方法有三种

Although self sealing bags are very convenient, sealing performance is also important. When designing self sealing bags, it is necessary to fully consider the performance and thickness of each layer of material to achieve sufficient barrier performance. There are three common methods for testing the sealing performance of self sealing bags

无水浸泡法。

Anhydrous soaking method.

自封袋通常适用于外层材料性能在水的作用下在测试过程中会明显下降的包装，如外层为纸质材料的包装。

Self sealing bags are usually suitable for packaging where the performance of the outer layer material will significantly decrease during the testing process under the action of water, such as packaging with paper material as the outer layer.

用试液(如与滤纸有明显色差的有色水溶液)填充样品，密封后将样品放在滤纸上，观察试液从样品内到外的渗漏情况。应该从两方面来衡量。也可以放在真空室中，在负压下测试。

Fill the sample with a test solution (such as a colored aqueous solution with a significant color difference from the filter paper), seal it, and place the sample on the filter paper to observe the leakage of the test solution from the inside out of the sample. It should be measured from two aspects. It can also be placed in a vacuum chamber and tested under negative pressure.

二、真空观察法。

2、 Vacuum observation method.

自封袋的适用材料同上。通过抽真空，产生样品内部和外部的压力差，观察膨胀和释放真空后样品形状的恢复，判断样品的密封性能。

The applicable materials for self sealing bags are the same as above. By vacuuming, a pressure difference is generated between the inside and outside of the sample, and the shape recovery of the sample after expansion and vacuum release is observed to determine the sealing performance of the sample.

第三，城市压在水里。

Thirdly, the city is submerged in water.

自封袋通常适用于外层材料性能在水的作用下在试验过程中不会明显下降的包装，如外层采用塑料薄膜的包装。通过对真空室抽真空，产生浸入水中的样品内部和外部的压力差，观察样品中的气体逸出或水分渗入，测量样品的密封性能。测量密封性能常用的手段是具有真实速率的测试装置。

Self sealing bags are usually suitable for packaging where the performance of the outer layer material will not significantly decrease during the testing process under the action of water, such as packaging with plastic film on the outer layer. By vacuuming the vacuum chamber, the pressure difference between the inside and outside of the sample immersed in water is generated, and the gas escape or water infiltration in the sample is observed to measure the sealing performance of the sample. The commonly used method for measuring sealing performance is a testing device with a true rate.

目前市场上很多商品都存在产品质量问题，总有穷店为了更好地实现目标而铤而走险。因此，我们在购买自密封袋时要特别注意，自密封袋因其方便易用而被广泛应用于食品等各个领域。很多人会问如何辨别自封袋是否有害。

At present, many products in the market have quality issues, and there are always poor stores taking risks to better achieve their goals. Therefore, we should pay special attention when purchasing self sealing bags, as they are widely used in various fields such as food due to their convenience and ease of use. Many people ask how to distinguish whether self sealing bags are harmful.

用双眼看。

Look with both eyes.

包装袋为白色、全透明或微全透明，材质匀称。有害密封包装袋为彩色或白色，但透明度和浊度较弱。塑料表层拉伸不均匀，含有小颗粒。

The non-toxic packaging bag is white, fully transparent or slightly fully transparent, with a uniform material. Harmful sealed packaging bags are colored or white, but have weak transparency and turbidity. The plastic surface is unevenly stretched and contains small particles.

听听你的耳朵。

Listen to your ears.

当用力摇晃包装袋时，会发出清晰的声音，表明是包装袋。而低噪音是有害的包装袋。

When vigorously shaking the packaging bag, a clear sound will be emitted, indicating that it is a non-toxic packaging bag. Low noise is a harmful packaging bag.

本文由济南塑料袋订做提供技术支持，更多的详细精彩内容请点击我们的网站http://www.sztensun.com我们将会全心全意为您提供满意的服务。

This article provides technical support for customized plastic bags in Jinan. For more detailed and exciting content, please click on our website http://www.sztensun.com We will wholeheartedly provide you with satisfactory service.