How to choose packaging materials suitable for cosmetics interior materials?
1. Highly active and easily oxidized ingredients (vitamin C, vitamin A, nicotinamide, essential oils, fruit acid stock solution)
Core requirements: high barrier, isolation from oxygen and ultraviolet rays
Preferred: brown/dark blue high borosilicate glass, aluminum hose, aluminum vacuum bottle, high barrier EVOH composite PET
Banned: Ordinary transparent PE, thin-walled single-layer plastic (breathable and light-transmitting, accelerates component failure and discoloration)
2. Oil-based heavy materials (makeup remover, body oil, essential oil balm)
Core requirements: Resistant to grease, not swollen, no harmful substances precipitated
Preferred: PP, borosilicate glass, pure aluminum containers
Avoid: PVC, ordinary ABS, cheap soft plastics (grease will dissolve the plastic, causing whitening and plastic odor)
3. Acidic materials (fruit acid, salicylic acid, VC stock solution)
Core requirements: Resistant to acid and alkali corrosion, no chemical reaction
Preferred: Neutral glass, PP, anodized aluminum
Avoid: ordinary electroplated metals and acrylic (acidic materials will corrode the coating and corrode the acrylic and turn it white)
4. Water emulsion, water-based refreshing material (toner, lotion)
Mild demand, suitable for a wide range of materials
Affordable: PET, PE; mid-to-high-end: frosted glass, thick-walled PP
5. Cream, mud mask, paste makeup
Core requirements: strong sealing, no penetration by extrusion
Hose type: aluminum-plastic composite pipe (best barrier); affordable: single-layer PE hose
6. High alcohol content (lotion, makeup setting spray)
Core requirements: Resistance to alcohol corrosion, no plasticizer dissolution
Preferred: glass, PP, pure aluminum cans
Avoid: thin ABS, ordinary electroplated parts (alcohol will dissolve the coating and produce impurities)
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