Cosmetic Manufacturing

Why Do Travel Squeeze Bottles Leak? Fixing Stress Cracking Failures Reference Standard: ASTM D1693 (Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics) Short Answer Refillable squeeze bottles frequently fail due to Surfactant-Induced Solvent Swelling (SISS) and poor ink adhesion. Aggressive surfactants in personal care formulas infiltrate the Polyethylene (PE) matrix, weakening intermolecular Van der Waals forces and triggering environmental stress cracking under mechanical squeeze pressure. Furthermore, the naturally low surface energy of PE repels printing inks, causing branding to peel in humid environments unless the substrate undergoes thermo-oxidative surface activation. Surfactant-Induced Solvent Swelling: The Silent Rupture of PE Matrices To understand why a seemingly durable travel size squeeze bottle … 続きを読む