Is the odor of the packaging bag caused by residual solvent? These two tricks will help you quickly identify it.
Release time:2019-12-06
Off-odor in packaging bags is the most intuitive quality issue that customers perceive. How to determine the source of the off-odor? Solvent residue is usually one of the first factors considered. How to rule out that the off-odor is caused by solvent residue?
The odor from packaging bags is the most intuitive quality issue that customers experience. How to determine the source of the odor? Residual solvent is usually one of the first factors considered. How can we rule out that the odor is caused by residual solvent?
The odor from packaging bags is the most intuitive quality issue that customers experience. Generally, the first step is to determine whether the odor is caused by residual solvent, additives, low molecular weight substances in the resin, or odors generated during film processing. These need to be distinguished. After ruling out residual solvent as the cause, then look for the cause from the perspective of the base material.
There are two methods to rule out residual solvent:
1. According to the standard residual solvent testing method, cut a 0.2 square meter piece of composite material, shred it, preheat it, extract the gas, and inject it into a gas chromatograph for residual solvent detection.
2. Cut a piece of composite film as large as possible, make it into a bag, fill it with air, seal it, heat it in an electric oven for a period of time, and use a gas chromatograph injection needle to extract a certain amount of air from the bag and inject it into a gas chromatograph for residual solvent detection.
When no residual solvent is detected using the above steps, such as below 10g/square meter, then you should start looking for the cause from the perspective of the formula and production process of other composite base materials.
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