QB/T 4309-2012 English PDF (QBT4309-2012)

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QB/T 4309-2012: Rewettability evaluation of fabrics softener
QB/T 4309-2012
QB
LIGHT INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 71.100.40
Classification No.: Y40
Filing No.: 36714-2012
Rewettability evaluation of fabric softener
ISSUED ON: MAY 24, 2012
IMPLEMENTED ON: NOVEMBER 01, 2012
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Principle ... 4 
4 Reagents and materials ... 5 
5 Instrument and equipment ... 5 
6 Test procedure ... 6 
Appendix A (Normative) Q-value test method ... 9 
Rewettability evaluation of fabric softener
1 Scope
This standard specifies the test method for the capillary effect time of white
cotton cloth, which is soaked in a softener solution and dried.
This standard applies to the evaluation of the rewettability of liquid type fabric
softeners.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) is applicable to this standard.
GB/T 6529 Textiles - Standard atmospheres for conditioning and testing
GB/T 6682 Water for analytical laboratory use - Specification and test
methods
GB/T 13174-2008 Determination of detergency and cycle of washing
property for laundry detergents
FZ/T 01071-2008 Textiles - Test method for capillary effect
3 Principle
Fabric's capillary effect refers to the measurement of the dispersion speed of
water on the fabric, that is, the measurement of the speed of water rising along
the capillary. It is expressed in terms of the height of rising for a certain period
of time OR the time required for rising of a certain height.
This method expresses the capillary effect of the cotton fabric, after treated with
the fabric softener, by measuring the time, which is required for the water to rise
to a certain height, along the capillary tube. It is used to evaluate the
rewettability of the fabric softener.
4 Reagents and materials
Unless otherwise specified, only confirmed analytical reagents and distilled or
deionized water or water of equivalent purity, are used in the analysis.
4.1 JB-00 white cotton cloth, in line with the provisions of Appendix A in GB/T
13174-2008.
4.2 Calcium chloride (CaCl2).
Note: It may also use the calcium chloride, which has a certain hydration number.
However, it needs to be converted, according to the consumption of CaCl2, which is
specified in 6.1.2.
4.3 Magnesium chloride (MgCl2·6H2O).
Note: Anhydrous or magnesium chloride, which has a certain number of hydration, can
also be used. However, in actual use, it needs to be converted, according to the
consumption of MgCl2·6H2O, which is specified in 6.1.2.
4.4 Capillary effect test solution: Grade 3 water conforming to GB/T 6682.
Note: In order to facilitate observation and measurement, it can add an appropriate
amount of blue and black (or red) ink or other suitable colored reagents, to the grade
3 water.
5 Instrument and equipment
5.1 Vertical decontamination testing machine, which is in line with the
requirements of GB/T 13174-2008.
5.2 Capillary effect test device, as shown in Figure 1.
5.2.1 Lifting bench, which has adjustable height.
5.2.2 Container: Used to hold the test solution; the height of the test solution
can be at least 50mm.
5.2.3 Beam frame.
5.2.4 Specimen clamp, which is placed on the beam frame, to fix the specimen.
5.2.5 Tension clamp, the mass is about 2g ~ 3g, OR the mass that makes the
test piece neither float nor stretch.
10.0L of 2500mg/kg hard water. When using, take 1.0L and dilute it to 10.0L,
which is 250mg/kg hard water.
6.1.3 Use 250mg/kg hard water, to prepare the tested fabric softener specimen,
into a 1.0g/L solution. Take 250mL of the test solution, in the bathtub of the
vertical decontamination tester (5.1). Meanwhile take 250mL of 250mg/kg hard
water, in another bathtub for, a blank test. Adjust the washing test temperature,
to keep it at (30 ± 1)°C. Prepare for measurement.
Note: For concentrated fabric softener, reduce the consumption of fabric softener
proportionally, according to its concentration ratio or instructions for use.
6.1.4 Put a piece of JB-00 white cotton cloth (6.1.1), in the specimen and the
blank test bathtub. Start stirring. Keep the stirring speed at 120r/min. Stop after
washing for 10min.
6.1.5 Take out the JB-00 white cotton cloth, from the bathtub. Put it into the
inner bucket of the rinsing device (5.3). Dehydrate the test piece manually, for
about 15s (rotating speed is about 1800r/min). Take out the dehydrated JB-00
white cotton cloth. Hang it to dry, at room temperature.
6.2 Cutting and humidity conditioning of test piece
6.2.1 Cut the naturally dried JB-00 white cotton cloth, into 4 test pieces of
150mm (warp direction) x 30mm (weft direction). During cutting, the distance
from the test piece to the cloth edge shall be more than 40mm. Use a pencil to
make two horizontal markings, along the weft direction, at 10mm and 30mm
from one end of the test piece. After cutting, the test piece shall be free of burrs
or loosening lines. Use filter paper, to separate the test pieces of different
specimens, after cutting. Place them in a constant temperature and humidity
box [temperature (20 ± 2)°C, relative humidity (65 ± 4)%], for 24h. OR place
them in a glass drier (5.6), which contains saturated sodium nitrite solution, for
24h, at a constant humidity. Prepare for use.
6.2.2 Before the test, place the capillary effect test solution (4.4), in a constant
temperature water bath, which has a temperature of (20 ± 2) °C.
6.3 Determination of capillary effect time
6.3.1 The test shall be carried out, under standard atmospheric conditions, at a
temperature of (20 ± 2)°C and a relative humidity of (65 ± 4)%.
6.3.2 Fix the unmarked end of the test piece on the beam frame (5.2.3). Adjust
the weft level of the test piece.
6.3.3 Install a tension clamp (5.2.5), which is about 2g ~ 3g, at about 5mm, from
the lower end of the test piece, to keep the test piece vertical.