What are the advantages and disadvantages of digital printing and traditional printing?
How to distinguish and identify the real reason of the food wrapping odor
by：Kolysen
2021-01-03
First of all, solvent residue (
Including transportation, storage process, from the environment to absorb the vapor)
Lead to smell and additives, resin of low molecular substances, membrane separation in the field of odor and other problems.
After ruled out the cause of the residual solvents, and then look for reasons from the Angle of the consideration on the substrate.
Food sack to eliminate residual solvents there are two steps: one is according to the standard of residual solvent testing method, a 0.
2 m2 composite interception, sliced, preheating, extraction solvent residues detection of gas chromatography;
2 it is to capture a composite membrane should be as large as possible, bag, fills the air, seal, fluently in the oven, heating time, by gas chromatograph needle from package from air to the amount of residual solvent testing gas chromatograph withdrawal.
When using detect the residual solvents or even though no residual solvent testing the above two steps, but solvent residual amount is lower than a certain value, such as 10 mg/m2, the compound membrane can be thought of odor problem customer complaint, due to the residual solvent printing and laminating process.
At this time, we should from the formulation and production technology in composite materials such as looking for reason.
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