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After repeated use of the ice box, there is a layer of transparent grease liquid on the surface, which is caused by the internal liquid penetrating out of the shell, and this kind of ice box is not caused by the fluorination process.

After the production of the ice box shell is completed, fluorine and nitrogen mixed gas are used to fluorinate the inside of the material, so that the fluorinated container can effectively prevent the penetration of organic solvents and product degradation.