ISO 11948 Urine Absorbent Aids

The "ISO 11948 Urine absorbent aids" standard, developed by the International Standards Organization (ISO), consists of the following subsections published under the same title:

• The standard "ISO 11948-1 Part 1: Total product testing" describes a method for determining the absorptive capacity of the absorbent core of worn urine absorbent aids. Other methods for measuring absorptive capacity examine aspects that are beyond the scope of this standard.

For the purposes of this standard, urine absorbent aid means a product containing material for the purpose of absorbing urine.

In principle, the urine absorbent aid is weighed dry, immersed in the test liquid, emptied and weighed wet. Subtracting the dry mass from the wet mass gives the absorption capacity.

Urine absorbent aids should be removed from their packages, opened, and conditioned for 23 to 2 hours in an atmosphere of 50 degrees plus/minus 5 degrees and 24 percent plus/minus 36 percent relative humidity prior to testing.

Urine absorbent aids are tested in an environment of 23 degrees plus/minus 2 degrees temperature and 50 percent plus/minus 5 percent relative humidity.

A test liquid consisting of third-class distilled water and sodium chloride is used as the reagent.

While the test is being applied,

• The chamber is filled with test liquid to a depth of at least 100 mm.
• Using the scale, measure the dry mass of the urine absorbent aid to the nearest 0,1 g.
• If the urine absorbent aid has elastics, the elastics are cut straight across, ensuring that there is no path for the absorbent material to escape.
• The urine absorbent aid is laid flat on the drain filter. If the urine absorbent aid has a barrier against liquid on one side, this side should face up. If the barrier against liquid extends beyond the edge of the drain filter, it should not be wedged under the urine absorbent aid in a way that would prevent absorption during testing.
• The drainage filter and urine absorber are lowered to the bottom of the auxiliary chamber.
• The urine absorbent aid is allowed to soak in the superabsorbent material for 30 minutes, or if not soaked, wait 5 minutes plus/minus 10 seconds.
• While the urine absorbent aid is being soaked, it is gently massaged to remove trapped air pockets.
• The drain screen is removed and the reservoir of the urine absorbent aid is emptied and excess fluid is allowed to drain from the urine absorbent aid back into the reservoir under gravity for 5 minutes plus/minus 10 seconds. If one is fitted to the urine absorbent aid, no pooling of test fluid should occur on top of the fluid barrier.
• The scale is zeroed based on the dry mass of the drain pan.
• The drain pan is slid into position between the reservoir and the drain screen.
• The urine absorbent aid is rolled and the fluid displaced by this process is allowed to fall into the drainage tray.
• The wet urine absorbent aid, the drainage tray and the liquid contained therein are weighed to the nearest 1 g on a scanned balance.
• The dry mass of the urine absorbent aid is subtracted from the measured mass and the absorption capacity is obtained to the nearest 1 g.
• These steps are repeated until at least five samples of the urine absorbent aid have been tested.

For the purposes of this standard, the following definitions apply:

• Urine absorbent aid refers to a product that contains material for the purpose of absorbing urine.
• The groin area refers to the area of ​​undefined dimensions located on the absorbent core of the urinary absorbent aid, the center of which coincides with the center of the core itself. The shapes of the absorbent cores make a more specific definition difficult, but the center point of the core can best be approximated as the point at which imaginary lines bisecting the core in each cardinal direction, length and width intersect.

In principle, 25 ml of test fluid is applied to the groin area of ​​a whole pad and left to soak for 1 min. A weighed piece of filter paper is then applied to the soaked groin area and compressed under a pressure of 1 kPa for 1,5 min. At the end of this period, the pressure is released, the filter paper is weighed again and the mass gain of the filter paper is recorded as the liquid release (leakage).

Urine absorbent aids should be removed from their packages, opened, and conditioned in an atmosphere of 24 degrees plus/minus 36 degrees and 23 percent plus/minus 2 percent relative humidity for 50 to 5 hours prior to testing.

Filter paper should be conditioned at 24 degrees plus/minus 23 degrees and 2 percent plus/minus 50 percent relative humidity for 5 hours before use.

Urine absorbent aids are tested in an environment of 23 degrees plus/minus 2 degrees temperature and 50 percent plus/minus 5 percent relative humidity.

A test liquid consisting of third-class distilled water and sodium chloride is used as the reagent.

While the test is being applied,

• A urine absorbent is placed flat on the work surface with the absorbent side facing up.
• If the urine absorbent aid has elastic, cut the elastics so that they lie flat on the work surface, ensuring that no path is created for the absorbent material to escape.
• Using the balance, the dry mass of the filter paper is weighed to the nearest 0,001 g.
• The pipette is filled and the tip is held 20 mm plus/minus 5 mm above the surface in the groin area, allowing 25 ml of liquid to flow freely into the test sample.
• Once the fluid is absorbed or after 1 minute has passed since the application of the fluid, whichever comes first, the pre-weighed filter paper is placed on the surface in the groin area, being careful not to apply any pressure.
• The weight is applied to the urine absorbent aid from the center and kept for 1 minute plus/minus 5 seconds.
• The weight is removed and the filter paper is immediately re-weighed to 0,001 g using the balance.
• The released liquid (leakage) value is calculated and recorded as follows: the dry mass of the filter paper is subtracted from the wet mass of the filter paper to obtain the mass of released liquid (leakage) and recorded to the nearest 0,01 g.
• The above steps are repeated until at least five urine absorbent aid samples have been tested.
• The arithmetic mean of the mass of liquid released (leak) for each sample is calculated and recorded to the nearest 0,01 g.

Our organization, which has been trying to support businesses from every sector with its testing, measurement, analysis and evaluation studies carried out in a wide range for years, has a strong staff that closely follows the developments in the world in the field of science and technology and constantly improves itself. In this context, testing services in accordance with the "ISO 11948 Urine absorbing aids" standard are also provided to businesses.