In all processes involved with polymer melt, especially extrusion and injection, the high viscosity of the melt can led to a high coefficient of friction (COF) between the product layers, especially for the polymer films. The relatively high friction between manufactured products, manufactured film layers and polymer-metal leads to numerous problems such as poor collection and consequently lower production rates.
The simplest and most economical way to reduce the friction coefficient is the use of slip masterbatches in the manufacturing process. Slip masterbatches not only reduce the adhesion of polymer layers to each other, but also reduce the adhesion between the polymer and the metal surfaces of the process equipment.
Slip masterbatches gradually migrate to the surface of the product and crystallize because of its tendency to surface air rather than the tendency for the polymer carrier. This layer of crystal acts as a lubricant layer and consequently reduces the coefficient of friction between the respective surfaces.
Since the migration of slip masterbatches is a time-dependent phenomenon, the performance of these additives is determined by measuring the slip rate of one film over another and consequently by calculating the friction coefficient as a function of time after extrusion. The intensity of the migration of the slip masterbatches to the surface depends on the molecular weight of the slip agent and the polymer matrix as well as the concentration of the component.
Ciba Polymer Kabir, with its long experience and state-of-the-art technology, while taking into account key features such as migration rate and the viscoelastic properties of polymer resin are able to produce different slip masterbatches to achieve different degrees of slipage in the polymer processing.
Advantages of Slip Masterbatches produced by Ciba Polymer Kabir:
Decreasing of the energy consumption and depreciation of process equipment.
Reduction of the adhesion between film layers to each other as well as to the metal surfaces of equipment.
Increasing of collection rates and production rates.
Facility of the processing and production of polymer films and sheets, such as mono- and multi-layer polyethylene and polypropylene films, as well as BOPP and OPP films.