02 May 2018
Tencel fabrics and rayon fabrics cause several holes in dyeing and finishing. Both Tencel fabrics and rayon fabrics are regenerated cellulose fiber fabrics with high penetration rate. They have distinctive green functions and are breathable and wicking. Satin fabric Very comfortable, no pollution, coupled with light and elegant, so it is more suitable for spring and summer thin fashion. However, the relatively thin Tencel fabrics and rayon fabrics are prone to produce holes during dyeing and finishing. What are the causes of the holes?
Some Reasons for the Draped Holes in the Dyeing and Finishing of Tencel and Rayon Fabrics
First, the causes of the holes in the dyeing and finishing of Tencel and Rayon fabrics are as follows:
(1) The amount of acid-oxygen water is too high;
(2) There are more iron ions in water quality;
(3) If there is a regularity in the hole, there is a problem with the equipment;
(4) Improper "temperature + time" parameter;
(5) Bleaching occurs in bleaching, and in most cases, hydrogen peroxide reacts with iron ions;
(6) Excessive purity of hydrogen peroxide and base;
(7) whether pretreatment and dyeing add softener, the possible use of water metal ion content is too high;
(8) The partial decomposition of hydrogen peroxide caused by heavy metal ions rapidly causes holes.
Second, hydrogen peroxide bleaching causes the causes of the holes in Tencel fabrics and rayon fabrics to be analyzed:
(1) Oil stains stained with copper, iron, and other heavy metal ions before bleaching; or contact with copper, iron, and other equipment during bleaching.
(2) The hydrogen peroxide concentration is too high, the steaming time after bleaching is too long or superheated steam is used.
(3) If the grey cloth is mercerized before bleaching, the mercerized water will not be clean and uneven, so that the PH value of the cloth is too high and the amount of alkali is too much.
(4) Improper selection of stabilizers or stabilization of stabilizers results in accelerated decomposition of hydrogen peroxide.
All of the above points may cause holes in the fabrics of Tencel fabrics and rayon fabrics, but the harmful effects of heavy metal ions are greater.