Slip Additives Anti Blocking Agent for Polypropylene
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Runpacet slip masterbatch is a compound formulation consisting of lubricating agents (such as oleamide, erucamide, etc.), carrier resins, and additives. It is primarily used to reduce the surface friction coefficient of products and enhance processing efficiency. This slip-opening masterbatch employs dual mechanisms of chemical lubrication and physical microstructure to address the challenges of film opening difficulties and blocking issues in plastic films. The technological evolution is trending toward low-dosage high-efficiency (e.g., 40% reduction in nano-amide particle usage), high-temperature resistance with long-lasting effects (withstanding processing temperatures above 200°C), and eco-friendly solutions (such as biodegradable bio-based amides). Demand has shown significant growth in sectors like food packaging, new energy, and electronic materials.
The slip masterbatch functions as a processing aid that reduces the surface friction coefficient of plastics and improves product opening performance. By migrating to the plastic surface to form a lubricating layer (e.g., oriented arrangement of amide molecules), it decreases the inter-film friction coefficient from 0.8-1.2 to 0.2-0.4, dramatically enhancing opening performance (opening force reduced by 50%-70%). In BOPP film applications, the dynamic friction coefficient is ≤0.3, meeting the cutting requirements of high-speed packaging machines operating at 200 packages per minute.
Some products incorporate micron-sized inorganic particles (e.g., silica with 1-3μm particle size) to create microscopic protrusions (approximately 2-5μm in height) on the film surface. This reduces interlayer contact area (contact ratio drops from 90% to 20%-30%), preventing blocking. The long-chain alkyl groups in the molecular structure (e.g., erucamide C₂₂) can lower melt viscosity, improve bubble stability during film blowing (e.g., 30% reduction in LLDPE film rupture rate), and minimize die buildup.
- EU REACH regulations restrict APEO-type slip agents. Color-matching formulations now opt for APEO-free amides or bio-based products (e.g., plant-derived erucamide) that comply with FDA certification standards.
