How to operate the dry cleaning and washing cylinder
Dry cleaning and washing cylinders are used to determine physical indicators such as the appearance, color, dimensional change and peel strength performance of hot-melt adhesive interlinings and various textiles after being dry-cleaned with organic solvents and alkaline solutions. It can also be used to test the color fastness of fabrics during dry cleaning and chlorinated water washing. At the same time, it can prepare samples for burning test.
Standards compliant:
AATCC 162, 16 CFR Part 1610, FZ/T01083-2000
Composition structure:
The instrument consists of a 7650ml stainless steel test box, a stand, and a multi-speed drive equipped with a digital timer.
Technical Parameters:
1. Equipped with stainless steel rotatable drum
2. Tank height: 330mm
3. The inner diameter of the tank: 220mm
4. Rotation speed: can be adjusted according to customer needs.
5. The overall length, width and height of the instrument: 720×490×620mm
6. Equipped with digital time display
7. Weight: 98kg
Precautions:
1. During the dry cleaning test, the instrument needs to be placed in a fume hood for the test (the solvent used is tetrachloroethylene, which is toxic).
2. Operators need to wear gas masks and protective gloves.
3. Liquid recovery needs to be handled carefully and can be sent to the waste liquid recycling station.
Steps:
1, clean the cylinder
Add about 5000mL deionized water and 0.5mL sodium hypochlorite (5.25%) into the cylinder, cover the cylinder head, run for about 10 minutes, and then pour out the solution. The cleaning of the cylinder is only necessary if other tests have been done or if it has not been used for more than two weeks.
2, configure hardness concentration reagent
- Weigh 8.24g anhydrous calcium chloride (CaCl2), 5.07g magnesium chloride hexahydrate;
- Add 800mL deionized water or distilled water to a 1L graduated measuring cup, add the above calcium chloride and magnesium chloride, stir while adding, and then make up 1L with water. This is the "hardness concentration reagent", which can be kept for 30 days.
3. Dilute 51mL "hardness concentration reagent" with deionized water or distilled water to 5100mL, and then add 0.5mL sodium hypochlorite. Determine the actual ppm value of Cl and adjust it to 5 ppm by titration.
4. Prepare a reagent solution with a pH of 7.0 by adding sodium carbonate (Na2CO3) and acetic acid (CH3COOH).
5. Add 5000 mL of the solution configured in 5.4 above to the cylinder, and adjust the temperature of the solution to 21°C.
6. Put the test sample and the control cloth into the cylinder together, and run for 60 minutes.
7. Take out the sample and the control cloth, and squeeze the solution out with a rolling mill. Then rinse thoroughly with deionized or distilled water. Then wring it out and let it dry on a bleached and absorbent paper towel at room temperature.
8. At this point, the entire dry cleaning process is over.
Note: If the sample is prepared for the combustion test, it may need to be washed before the test, such as 16 CFR Part 1610.
For specific details, please refer to the corresponding test standards.