Polyolefins such as high‐density polyethylene (HDPE), low‐density polyethylene (LDPE), and polypropylene (PP) are among the most widely used packaging materials in the cosmetic industry. Since these materials are in direct contact with cosmetic products, various components of the products are adsorbed to the packaging material’s surface and migrate within the amorphous regions of the polyolefin. This migration process, which occurs in both virgin and post‐consumer recyclate (PCR) materials, can lead to deformation of the packaging. In this study, different types of virgin and PCR pellets were examined to investigate their interaction with cosmetic products and to understand the factors influencing the migration process. The migration of cosmetic oils was observed in all pellet samples, depending on the composition of the product and environmental conditions. The process was characterized by the weight gain of the plastic pellets and further identified through nuclear magnetic resonance (NMR) and infrared (IR) spectroscopy. Additionally, differential scanning calorimetry (DSC) and gel permeation chromatography (GPC) measurements were performed to analyze the polymer structure. Components with lower molecular weight (MW), high nonpolarity, and elevated temperatures were found to accelerate the migration process. Moreover, migration occurred more slowly from oil‐in‐water emulsions with larger droplet sizes compared to water‐in‐oil systems with smaller droplets. Among the different polyolefins, PP demonstrated a higher uptake of migrating components but at a slower migration rate compared to HDPE and LDPE. When comparing virgin and recycled polyolefins, it was observed that migration was consistently slower in virgin materials than in recycled ones. The ability of oils to migrate is influenced by the molecular structure of the polymers: high density, crystallinity, and low levels of branching reduce both the migration speed (MS) and the maximum saturation, as seen in virgin HDPE. In contrast, materials like LDPE, with a less dense polymer structure, exhibited higher MSs and saturation limits. As a control, polyethylene terephthalate (PET) was used, and it showed no migration due to the polymer’s high density.

Laetitia Bolte

Heiner Gers-Barlag

Guido Heinsohn

Rolf Daniels

Advances in Polymer Technology

ADVANCES IN POLYMER TECHNOLOGY 发表文章，报道聚合物材料、其制造和加工、聚合物产品设计以及考虑聚合物技术的经济和环境影响的重要发展。该杂志主要面向研究人员、技术人员、工程师、顾问和生产人员。

Advances in Polymer Technology publishes articles that report significant developments in polymer materials, their manufacturing and processing, polymer product design, and the economic and environmental impacts of polymer technology. The journal primarily targets researchers, technicians, engineers, consultants, and production personnel.

《Advances in Polymer Technology》发表关于聚合物材料、制造与加工、聚合物产品设计，以及聚合物技术在经济和环境影响方面的重要发展。该杂志主要面向研究人员、技术人员、工程师、顾问和生产人员。

Category	Quartile
工程技术	4
工程技术, 工程化工	4
工程技术, 高分子科学	4

Migration of Cosmetic Components Into Polyolefins

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