A method for identification of the fiber web of textile materials, in particular for the identification of pa 6 and pa 66 in carpets

摘要

The invention relates to a method for identifying the pile of textile materials, especially for identifying PA 6 and PA 6.6 in carpets. According to the invention and before the measurement is carried out, the textile materials, such as carpets, are cleaned by means of a high-pressure water or water vapour beam within a short time and using little quantities of water of 70 DEG C and involving a distance of the nozzle to the carpet from up to 20 cm for water treatment and 10 cm for water vapour treatment, whereby fast cooling by means of a liquid nitrogen is simultaneously carried out and said beam is directed at a certain angle in relation to the carpet plane. The thus cleaned textile materials, such as carpets, are subject to a Raman spectroscopic examination, wherein a Raman probe vertically acts upon the textile material with a pressure of up to 7.5 kp/cm2. The laser beam covers a distance of up to 25 mm during a time of measurement of up to 25 seconds. Said area is exposed to radiation involving a wave number 13,000 cm-1 and a spectrum is measured every 0.2 mm. A vector-standardised spectrum is produced from the individual measured values. Said spectrum is compared to vector-standardised reference spectrums of pure PA 6 or PA 6.6.