PE Packaging: The Backbone of Personal Care

Technical Specification: Engineering PE for Performance

Polyethylene (PE) is the most versatile polymer in packaging, but selecting the right grade and density is critical for product stability. At Golden Soar, we engineer our PE solutions based on three critical pillars: Density, Process, and Decoration.

1. HDPE vs. LDPE: The Density Spectrum

High-Density Polyethylene (HDPE) ranges from 0.93 to 0.97 g/cm³. Its linear molecular structure provides high tensile strength and rigidity. It is the material of choice for large volume containers (shampoo, laundry detergent) requiring stacking strength. Its semi-opaque nature offers a natural UV barrier.

Low-Density Polyethylene (LDPE) ranges from 0.91 to 0.94 g/cm³. Its branched molecular structure prevents tight packing, resulting in high flexibility. This makes LDPE the only viable option for “squeezable” applications like lotion tubes, eye drops, and travel amenity bottles.

2. The Science of Stress Cracking (ESCR)

Environmental Stress-Cracking Resistance (ESCR) is the single most important metric for B2B buyers of PE packaging. Surfactants found in shampoos and soaps can act as stress-cracking agents, causing bottle failure over time. We adhere strictly to ASTM D1693 protocols, testing notched samples in 10% Igepal solution at 50°C. We guarantee our bottles withstand >168 hours of exposure, ensuring shelf stability for 2+ years.

3. Decoration & Surface Energy

PE is non-polar, meaning ink does not naturally adhere to it. To solve this, every bottle coming off our line undergoes Flame Treatment 또는 Corona Discharge. This oxidizes the surface, raising the surface energy to >38 dynes/cm, allowing for permanent bonding of silk-screen inks and hot-stamping foils.