DSS K05 reduces the need for expensive polymer processing aides and allows processors to run at higher output rates by reducing the occurrence of melt fracture.
Dual Spiral Systems has teamed up with a surface engineering and metal coatings company to supply a newly developed composite coating for extrusion dies named K05.
The new K05 coating is intended for use on extrusion components that experience a high degree of abuse or abrasive wear, where chrome plating was previously used.
Some of the unique properties of K05 are that it is extremely hard, resists temperatures in excess of 3000 C, and has a coefficient of friction (COF) 4 times lower than regular chrome or nickel plating. Melt fracture or "Sharkskin" causes processors to run blown film lines at slower rates.
Due to its very low COF, K05 has the ability to reduce the occurrence of melt fracture commonly observed on extrusion lines that do not use polymer processing additives. Because of this, K05 coating eliminates the need for PPA lubricants.
Even though most of our testing has been on the blown film process, we have also tested the K05 coating on medical tubing lines, PEEK applications and processes which benefit from having a low friction surface. Because the coefficient of friction of K05 is 4 times lower than typical chrome or nickel plating, we have found a lot benefit in areas where polymer degradation and hang ups were previously a problem. We have seen that because the polymer does not stick to the K05 coated surface, the chance of degradation is significantly reduced, and usually eliminated, particularly for shear sensitive resins like PVC where degradation is most predominant. The coated surfaces are also much easier to clean.
DSS K05 coating is less expensive than traditional low friction coatings used in extrusion dies and molds. DSS can plate any die component or lip section with K05 regardless of who the manufacturer is.