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Slip agents: extended performance range for polyolefin films: newer specialty slip masterbatches go beyond traditional capabilities to provide greater thermal stability, reliability, and ability to hold COF steady during laminating.

by:Taian Lamination Film     2020-09-28
Today, slip-on Masterbatch additives for low-density polyethylene, llannan and other olefin films offer a wider range of performance capabilities than in the past.
These products from traditional amide single--
Main Level used now-
New major, non
Migration level that can meet the requirements of good work at higher temperatures, improve reliability and maintain friction coefficient (COF)
Stable before and after lamination.
The processor should be aware of the new alternatives and overcome the previous limitations.
Anti-slip agents overcome the natural stickiness of the resin, so they can move smoothly through conversion and packaging equipment.
In general, low-density polyethylene and llannan films are classified as low, medium-, or high-
Depend on their COF.
The COF level usually corresponds to the amount of sliding they contain (see Table 1).
Slip bar Masterbatch is available in a formula that allows for various diffusion rates, eventually
Use Temperature, resin and ink.
The traditional kava is amides based on unsaturated fatty acids, and the most common is oil amide and diammonium.
After extrusion, these primary amide migrate slowly through the olefin membrane and appear on the surface of the membrane to reduce COF.
The molecular weight of other carwa based on secondary amino groups is almost twice that of primary amino groups, so the migration speed is slower in polyolene.
Traditional first-and second-order amide is commercially sold in low-density polyethylene, llannan, and mLLDPE carriers.
New sliding mother material: None
Migration kava with very large molecules and special formula suitable for lamination.
Special grades can be made up of a mixture of primary or primary and secondary amide sheets as well as various carrier resins such as PP, EMA and EVA.
Standard step-by-step film producers often rely on amide sheets because they reduce fat content at a reasonable cost.
The first and second level amide sheets allow process orsto to select COF between 0. 1 and 0. 4.
The migration slip concentration in the mother material is usually 5% to 10%.
The moving sliding concentration is usually between the actual membrane of ppmin from 200 to 2000.
Thin films often require a higher sliding concentration to reach a given COF.
Erucamide is more widely used because it comes from non-
Animal origin and tend to be hotter and more stable than oil amine.
The film requires a regulation period after extrusion in order to establish a balance between the sliding of the film surface and the sliding inside.
Since most of the reduction in COF occurs on the first day (Table 2)
, Usually measure COF in low density polyethylene and llannan film 24 hours after extrusion.
The COF and slip migration rates are typically customized for end users.
Faster sliding diffusion for in-
Production line for bags and other products.
In order for the COF not to drop too fast and cause the winding difficulty and expansion of the roll, the roll stock needs a slow sliding diffusion.
Many variables of the migration factor affect the migration rate and the final COF.
With smaller sliding molecules and higher concentrations, the diffusion rate in the polymer is faster.
The properties of polymers are also important.
Sliding molecules diffuse mainly through the amorphous region of olefin, and in more crystalline resins, such as high density polyethylene and PP, the migration rate is slower than that of inhdpe or llannan.
Highly amorphous and viscous polymers such as low density mLLDPEgrades (
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