Webbing or washing standard rub fastness rubbing dry rubbing fastness and wet rubbing fastness two kinds.
1. Preparation for testing (1) Preparation of webbing or washing labels: There are two methods for preparing webbing or washing labels. The details are as follows:
1 If the webbing or wash label is a fabric or a carpet, cut the webbing or wash mark into at least two pieces of a sample no less than 20mm x 50mm, and a piece of dry friction and wet rubbing along the longitudinal direction parallel to the warp yarns for warp direction; The other is dry and wet with a lengthwise direction parallel to the weft yarns for latitude.
When testing textiles with multiple colors, select the appropriate location so that all colors are rubbed. If the webbing or the washing mark cannot include all the colors or the dry friction and wet friction are not in the uniform color position, the number of webbing or number of washing marks must be increased.
2 If the webbing or washing is a yarn, it must be knitted into lace or fabric, with an area not less than 50mm x 200mm. The yarn can also be entangled in parallel around the same size as the webbing of the webbing or wash label to make a thin layer, dry friction while doing wet friction.
(2) Friction cloth: The cloth for friction (according to GB/7565) should be a cotton fabric with desizing, bleaching, and no pick-up agent. Cut it into a 50mm x 50mm square for a circular friction head, or a 25mm x 100mm rectangle for a rectangular friction head.
(3) Water for testing is tertiary water and meets 8.1 in GB/T 6151-1997.
(4) Dripping net: Stainless steel wire mesh with a diameter of 1mm, a mesh width of about 20mm, or an adjustable pipetting device.
(5) Equipment: Rubbing fastness testing machine. The device has two different sizes of friction head (a rectangular friction head, a circular friction head), friction head vertical pressure of 9N, linear reciprocating stroke of 100mm, reciprocating speed 60 times / min.
(6) Gray card for evaluation of discoloration and grey card for evaluation of staining.
2. Detection method The test method is to lay the webbing or washing standard flat on the bottom plate of the rubbing fastness tester, and fix the ends of the webbing or the wash label with a clamping device so that the length direction of the webbing or the wash label and the direction of movement of the instrument. Consistent.
(1) Dry friction: Fix the webbing or washing mark on the rubbing head of the rubbing fastness tester so that the warp direction of the rubbing cloth is consistent with the running direction of the rubbing head. In the dry friction ribbon or the length of the washing standard, after starting the machine, the reciprocating stroke is 100mm, and the vertical pressure of the friction head is 9N. The webbing and the laundering direction are detected respectively. Ribbons or wash labels and rubbing cloths are used to regulate humidity in the standard atmosphere. Tests should be conducted in a standard atmosphere.
(2) Wet Friction: Wet rubbing ribbons or washing marks must be wetted with a third-grade water, which can be dripped and placed on the dripping net to be dripped on average, or squeezed using a mangle roll to make the moisture content reach 95% to 105%. Other operations are basically the same as dry friction detection. After the wet friction test is finished, dry the wet rubbing cloth at room temperature.
3. Test results (1) The grey level sample card was used to evaluate the above-mentioned warp and weft stain levels of dry and wet rubbing.
(2) Write a test lecture.
4. Matters needing attention (1) Rectangular friction heads are used for velvet fabrics (cotton belts) (including textile carpets). Other types of textile circular friction heads.
(2) The color fastness to rubbing should be measured on the front of the webbing or wash. If dyed fibers are taken out and left on the rubbing cloth, they must be removed with a brush.
(3) The lining fabric should be stored in a sealed, dark, and dry place to avoid contamination, moisture and yellowing.
(4) Before the test, it should be carefully checked whether the friction surface of the friction head is smooth and free of irregularities.
(5) When the rubbing cloth is fixed on the friction head, it cannot be loosened. After fixing, care should be taken to place the rubbing head on the webbing or washing to avoid accidental increase in staining
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