Determination of Properties of Scouring Agent - Determination of Hair Effect

1. The common method. To correct the check meter of capillary effect into the horizontal position and adjust the scale, making the scale of the zero point exactly with the water level. And then take the sample cut to 30cm, zonal two cloth of 5cm, using a pencil to mark the end of the 1cm along the zonal level. And then to fix a short glass rob of 2g at the end of the latitudinal direction as a burden, and the other end of the clamp is in the instrument's iron clamp, causing the glass fixed at one end of the rod to drop into the water. To mark the 1cm level, and to start timing. After 30min, observe the height of distilled water wetting cloth. If it is uneven, read the minimum. Take the average of two data.

2. Express method. Cutting the weft width 2cm and passing the length of 10cm cloth. According to the above sample method test, to watch the needed time that distilled water rising to 2cm height. If it is uneven, take the minimum value.

3.The method of dripping drops down. Tight the sample up on the tension rack and install the distilled water according to the requirements. And then to place tension rack under the nozzle where is away from dropping at 1cm.When the drop falls on the cloth that the stopwatch turns on while the minute surface of the surface of drop disappears, the stopwatch turns off. To have even value at different places after test of 5 to ten times. When the wetting time is short, the hair effect is good.
It can add some soluble dye into the distilled water. The completeness can be defined by the shape of the stain left behind by the diffusion of water droplets.

4. Illustration；
◎Determination of capillary effect is generally to use common methods; but in some cases, rapid method and the method of dripping drops down should be better which can be able to explain the problem. For example, fabric contact treatment liquid continuous processing is a relatively short time, so the determination of scouring agent capillary effect is more practical in a short period of time. 

◎The capillary effect of the fabric, if not specified in the experimental conditions, refers to the 30min height of the distilled water under the above conditions (cm)

◎ In order to facilitate the observation, 0.5% potassium dichromate can be added to distilled water

◎The parallel test of sample or test point should be selected at intervals.

◎The tested pattern should maintain a certain moisture regain. If permitting, it should be placed in a constant temperature and humidity box (20 degrees Celsius temperature, relative humidity 65%) for 24 hours before the test. A saturated solution of sodium nitrite can also be placed under the partition of the dryer as a simple constant humidity device.