The Purpose and Scope of Fabric Dimension Variance Rate

Standard Dry-cleaning Tester meets a variety of dry cleaning standards that define the dry cleaning process for commercial dry cleaners. The method of measuring the dimensional stability of the fabric and garment after dry cleaning with tetrachloroethylene, it can not only measure the dimensional stability of a dry cleaning but also measure the dimensional stability after repeated cycle dry cleaning (usually not more than 5 times).

Test Principle of Fabric Dimension Change

Print and measure the length of the moistened fabric or garment, dry clean and post-treat the sample. Then humidify a measure the size change rate of the sample.

Test Sample Preparation

The garments were tested as they were. The shear size of the fabric is not less than 500mm*500mm, and the edges are wrapped with polyester yarn to prevent edge stripping. Elastic cylindrical knitted fabrics should be carefully cut along the lines so that they are not damaged. Mark and measure the sample before testing.

Place the samples separately on a flat and smooth horizontal plane at (21±1)℃ and (65±2)% relative humidity for at least 24 hours. When printing marks, place the sample tensionless flat on a flat, smooth plane, avoiding creases or creases. Print three sets of marks in length and width direction, the marking size is at least 250 mm.

Test Procedure

1 Put the moisturized samples and the washing products into the dry cleaning machine, add the mixture of Span80 and tetrachloroethylene, the content of Span80 in the perchloroethylene is 1g/L, and calculate the amount of the solvent according to the addition of 0.65L solvent per kilogram sample and the washing cloth. Keep the solvent temperature at (30±3)℃ during dry cleaning.

2 Calculate according to the volume, prepare the emulsion. Turn off the filter path, start the standard dry-cleaning equipment and slowly add a certain amount of emulsion to dry cleaner.

3 After starting the instrument, keep the instrument running for 15 minutes. No filter path is used during the operation of the instrument except when the solvent is added in the first step.

4 Remove the solvent and centrifuge for 2 minutes to remove the solvent of the sample. Then add a certain proportion of tetrachloroethylene to solvent rinsing for 5 minutes, drainage and dehydration for 3 minutes.

5 Drying the sample, the outlet temperature is not more than 60℃, and the inlet temperature is not more than 80℃. After drying, blow the sample with ambient air for 3-5 minutes.

6 Take out the sample, treat the sample with an appropriate method, and measure the change rate of fabric size.