Quantifying Residual Coning Oils in Quantitative Viscose Content Determination
Unextracted coning oils add false mass to insoluble fiber fractions during quantitative chemical dissolution, distorting declared viscose blend percentages.
Paraffinic Mineral Oil Finish
Lubrication Agent
Hydrocarbon based substances applied to the surface of fibers reduce the friction generated during spinning and knitting. A paraffinic mineral oil finish is commonly used on synthetic yarns to prevent the buildup of static electricity and to protect the filaments from heat. The lubricant is usually applied via a kiss roll or a metered spray.
It remains on the fiber until it is removed during the final scouring stage.
Fiber Processing
Smooth movement of the yarn through the metal guides of a machine is necessary for maintaining a high production speed. When a paraffinic mineral oil finish is present, the yarn glides without snagging or breaking. It also reduces the wear on the needles and sinkers of the knitting machine.
Heat Stability
Resistance to evaporation and oxidation at high temperatures is a primary requirement for any processing oil. A paraffinic mineral oil finish must remain stable during the heat setting process to avoid yellowing the fabric. Poor stability leads to the formation of smoke in the stenter frame.
Scouring Removal
Elimination of the lubricant before dyeing is necessary to ensure that the color is absorbed evenly. If the paraffinic mineral oil finish is not completely removed, it acts as a barrier that causes dye spots and streaks. Standard aqueous scouring with non ionic detergents is usually sufficient for cleaning.