Oiling Agent for Fiber Treatment

Abstract

The present invention has its object to provide a lubricant for fibers which shows, in particular, good anti-tackiness property against fiber-to-fiber tackiness in the manufacture of elastic fibers, and good time-dependent stability for a long period of time as a lubricant for treating fibers.The present invention provides a lubricant for treating fibers to be used for fibers made of a polymer material (a) wherein the angle of contact with water at 25° C. of the surface of a sheet made of the material (a) is not greater than 60° and the angle of contact with water at 25° C. of the surface of the sheet made of the material (a) applied with the lubricant for treating fibers is 70° to 180°.

Description

TECHNICAL FIELD[0001]The present invention relates to a lubricant for fibers and, more particularly, to a lubricant for treating fibers to be used in the spinning step in the manufacture of elastic polyurethane fibers for obtaining elastic polyurethane fibers showing little tendency toward fiber-to-fiber tackiness and showing good rewindability.BACKGROUND ART[0002]Among the methods of producing elastic polyurethane fibers that are known in the art, there are the melt spinning, dry spinning and wet spinning methods, among others. However, every method encounters a problem, namely poor rewindability in a subsequent processing step due to a marked tendency for fiber-to-fiber tackiness.[0003]In recent years, the need has been increasing to improve the productivity in producing elastic fibers by increasing the rate of rewinding. In the field of warp knitting, in particular, a high rate of rewinding is required in the step of warping. If the rewindability is poor, yarn breaking, among oth...

AI Technical Summary

Benefits of technology

[0007]Accordingly, it is an object of the present invention to provide a lubricant for treating fibers which produces good anti-tacking property against fiber-to-fiber tackiness in the production of fibers. A further object is to increase the time-dependent stability of a lubricant for fibers and provide a lubricant for fibers which makes it possible to stably produce fibers while eliminating the problem of aggregation and precipitation of anti-tackiness agents or the problem of uneven application to fibers, among others, in or during use thereof.

Problems solved by technology

However, every method encounters a problem, namely poor rewindability in a subsequent processing step due to a marked tendency for fiber-to-fiber tackiness.

In the field of warp knitting, in particular, a high rate of rewinding is required in the step of warping.

If the rewindability is poor, yarn breaking, among others, is caused in the step of warping, leading to a marked reduction in productivity.

However, such a solid ingredient as mentioned above in the lubricants proposed in Patent Documents 1 and 2 is poor in dispersion stability, aggregating and precipitating in lubricants with the passage of time; therefore, when such lubricants are used, uniform application thereof to fibers becomes difficult and, accordingly, the anti-tacking property can hardly be produced to a sufficient extent and such a problem as yarn breaking may possibly be produced due to changes in tension in a subsequent processing step.

For attaining a sufficient anti-tacking property, the amount of addition of the anti-tackiness agent must be raised; the result is that the viscosity of the lubricants increases and the uniform application to fibers becomes difficult to attain.

It is also a problem that the silicone-modified anti-tackiness agents are expensive.

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