LDPE

Why Do Cosmetic Travel Containers Fail Under Pressure? Reference Standard: ASTM D1693 – Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics Short Answer Cosmetic travel containers typically fail due to barometric pressure gradients causing volumetric expansion of internal air pockets, leading to seal breach. Furthermore, the interaction between aggressive surfactants in beauty products and the polymer matrix of the container triggers Environmental Stress-Cracking (ESC), resulting in brittle fractures at high-stress points like creases or threads. Macromolecular Fatigue and Crystallinity Evolution Under Cyclic Squeezing The structural integrity of cosmetic travel containers is fundamentally dictated by the micro-morphology of the Low-Density Polyethylene (LDPE) resin used in their manufacture. LDPE is characterized … 続きを読む