full or in part with an equal weight of coconut oil which is more resistant to high temperatures that may occur during processing of some yarns however the finish containing butyl stearate is generally preferred because of its better lubricating properties the following example demonstrates use of the preferred spin finish of the present invention a polycaprolactam yarn 200 denier 32 filament was prepared by conventional spin draw techniques immediately after spinning the spin finish consisting of 50 parts by weight of butyl stearate 18 parts by weight of sorbitan monooleate and 32 parts by weight of sorbitan monooleate reacted with 20 moles of ethylene oxide was applied to the yarn at the rate of 0 85 weight percent based on the weight of the yarn the spin finish was applied to the yarn as 14 weight percent emulsion in water by means of a conventional kiss roll applicator drawing performance beaming and weaving properties of the yarn were excellent after drawing the yarn was tested for frictional and static properties yarn to metal friction was about 165 grams based on the tension generated by passing the yarn over a 0 25 inch chrome plated stainless steel pin at 1 000 feet per minute said pin having a rms of 2 0 2 2 static generation was 30 millivolts based on static generated by passing the yarn over a 0 25 inch chrome plated stainless steel pin at 200 feet per minute said pin having a rms of 4 0 4 5 fabric was.