Abstract: The invention is directed to a hydrolytically polymerized polycaprolactam with new chain regulation, whereby the polymerization of caprolactam (I) is carried out with 0.1-0.7 weight percent of an aromatic dicarboxylic acid (II), 0.01-0.7 weight percent of an aliphatic or cycloaliphatic diamine (III) that carries a primary and a tertiary amino group, and/or 0.01-0.7 weight percent 4-amino-2,2,6,6-tetraalkyl piperidine (IV), whereby the quantities of constituents I through IV add up to 100 weight percent and the quantity of the constituents III and/or IV amounts to 0.01-0.7 weight percent.

Abstract: The present invention relates to equipment for monitoring the yarn travel on a textile machine, particularly in the shuttle of a weaving loom, comprising a piezoelectrical yarn sensing unit mounted in the shuttle and an electronic receiving circuitry outside the shuttle. The sensing unit transmits yarn travel signals of a frequency which is determined by one of the natural frequencies of the sensing unit, and the electronic receiving circuitry comprises at least one resonant circuit tuned to that natural frequency.