Details

Autor(en) / Beteiligte

• Dulal, N.
• Shanks, R.
• Chalmers, D.
• Adhikari, B.
• Gill, H.

Titel

Migration and performance of erucamide slip additive in high‐density polyethylene bottle caps

Ist Teil von

• Journal of applied polymer science, 2018-11, Vol.135 (43), p.n/a

Ort / Verlag

Hoboken, USA: John Wiley & Sons, Inc

Erscheinungsjahr

2018

Quelle

Wiley Online Library

Beschreibungen/Notizen

• ABSTRACT Diffusion of erucamide and their morphology on surface characteristics of high‐density polyethylene (HDPE) screw caps depend on storage conditions. Erucamide performance relies on its amount, distribution, and consistency on the surface of HDPE. Specific application and removal torques can be achieved by controlling the amount of erucamide on the surface. The surface amount and the torque increased to an optimum level at 38 and 50 °C within 120 hours of incubation, while they remained unchanged for lower temperatures. Erucamide diffused to the surface and formed flat plate‐like crystal structures at similar time and temperature. These flat‐plates can slide over each other and provide the slip required to decrease the torque. An increase in contact angle demonstrated that hydrophobic hydrocarbon‐chains of amide slip additives were oriented toward the air interface. An optimum surface amount of erucamide for proper sealing torque could be produced at a different combination of storage time and temperature. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46822. Erucamide migrates to the surface and decreases the application and removal torque of HDPE screw caps. Its efficiency depends on the surface amount, morphology, and rheology. Placoid scales‐like structures prevent the contact of HDPE caps with PET bottles and detaches from surface to produce slip during application. The storage temperature and time influence the diffusion of erucamide to the surface therefore an optimum storage condition for aging is vital for maximum performance.