The compatibility of cosmetic packaging and its contents broadly refers to the interaction between plastic packaging and cosmetics, including chemical compatibility, physical compatibility, and biological compatibility.

The following briefly describes the specific situations of various types of incompatibilities:

Chemical incompatibility: The chemical components of the packaging materials, chemical reactions between the decomposed products and cosmetic ingredients during processing, have an adverse effect on the cosmetics or packaging materials; chemical incompatibility manifests as changes in the appearance and smell of the packaging materials or cosmetics For example: yellowing of material, yellowing of pink packaging material

Biological incompatibility: certain substances in packaging materials migrate to cosmetics, which has an adverse effect on users; manifested in the amount of harmful substances dissolving exceeds the amount specified in the relevant cosmetic hygiene standards or specifications in the country where the cosmetics are sold; generally, Harmful substances include various plastic additives, residual solvents, volatile organic compounds, and harmful metal elements. Of course, not all dissolved plastic additives will have a serious impact on the properties of cosmetics. When the dissolved component is one of the cosmetic components, the amount of the dissolved component is small, and the dissolved component is not harmful to the user. This dissolution phenomenon is normal. Compatible. For example: The colorant in the plastic is precipitated into the content. The content is originally off-white.

Physical incompatibility: The physical changes of the packaging material and the contents due to the influence of each other; physical incompatibility manifested as penetration, adsorption, cracking, cracking, dissolution, etc. In the test and judgment, physical incompatibility is often misjudged as chemical incompatibility. This is because the phenomenon of physical incompatibility is more obvious and the reaction is more violent. For example: surface crack, stress crack

In view of the fact that the plastics used in cosmetic packaging materials have certain solvent resistance properties, and the cosmetics are relatively mild, the incompatibility between cosmetics and packaging materials is more manifested as physical incompatibility.

In addition, quantitative chemical analysis experiments have proved that the incompatibility between cosmetic packaging materials and their contents is usually not a single manifestation.

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