Organic antiblocking

Table 12.3 Comparisons of Antiblocking Performance in Various PO Films Containing 1000 ppm of Selected Organic Antiblocks...

The detailed mechanism of how organic antiblock additives work is not yet understood. It is thought that a barrier layer is formed on the plastic film surface, thus inhibiting the two adjacent plastic film layers adhesion. Their usage is limited. Organic antiblock additives were partially discussed above and will not be further mentioned here. 

Properties and performance of inorganic antiblocking additives are not affected by solubility but this is the only exception. Organic antiblocking, release, and slip additives perform in accordance with their solubility in systems into... 

In summary, organic antiblocking, release, and slip agents all benefit from incompatibihty with matrix polymer. Only in some applications of release agents, it may be necessary to review this statement, if the presence of release agent on the surface affects further use or processing properties of the formed part. 

According to the principles of action and application, the organic antiblocking, release, and slip additives are ... 

Figure 10.9 shows some data on blocking performance of organic antiblock-ing/slip additives.Stearamide is a very efficient antiblocking agent. 

Balanced lubricant, effective organic antiblocking for rigid, semirigid and plasticized PVC... 

Keaiamide B, S, H-40 and H-20 fatty amides are organic antiblock agents. They do not contain silicas or other odnerals, so they have less effect on film haze. In some resins, they can also provide slip effects. 

The dispersion and incorporation processes of fillers and antiblocking additives are discussed in other sources. Organic antiblocking and slip additives, solids of low melting temperature, can be mixed with other components of formulation without any special difficulties, but they are usually incompatible with polymers and as such may easily separate or form concentration gradients if left without mixing. For this reason the process of their addition must include homogenization just before material formation into its final shape. 

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