pounds is reported as this average divided by 100 and multiplied by the full scale load in general several determinations are made and the average reported effective lubrication of a carpet backing to reduce fiber breaking during needle tufting without reducing tuft retention is measured by this test higher values of tgt show greater lubrication fo the backing a tufted sample is cut into samples 4 inches wide by 6 inches long in the tufting direction the sample is mounted in an 34 instron 34 using a 1 inch by 2 inch clamp on the back side and a 1 inch square clamp on the front side at a jaw separation of 3 inches a crosshead speed of 12 inches per minute is used the peak of the 34 instron 34 curve is read and reported as pounds breaking strength a silicone glycol copolymer having the approximate average formula str2 was mixed in various amount with five portions of butyl stearate to provide five compositions of this invention containing 9 4 21 3 11 2 and 1 parts respectively of butyl stearate for every part of siloxane glycol copolymer seven pieces of spunbonded nonwoven polypropylene carpet backing designated as typar u00ae 3301 by e i dupont de nemours and co inc were coated using a gravure roll with one of the above compositions of this invention or butyl stearate or the silicone glycol copolymer noted above an eighth sample of carpet backing was not coated the coated and noncoated carpet backing samples were needle tufted with a 1 10 guage needle fitted with 2600 denier herculon u00ae brand polypropylene yarn 10 tufts per inch to provide a carpet sample having a pile.