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Determination of the viscosity of the adhesive

Determination of the viscosity of the adhesive
1 Subject Matter and Scope
This standard specifies the use of rotational viscometers and viscosity measuring cup viscosity bopp tape methods.
This standard applies to rotational viscometer Newtonian fluid or similar Newtonian fluid properties of the bopp tape viscosity measurement.
The viscosity of this standard applies to 50mL sample cup outflow time bopp tape viscosity measurement in 30 ~ 100s.
Principle 2
2.1 rotational viscometer viscosity is the dynamic viscosity, which is based on the apparent viscosity with shear rate changes reversibly change.
2.2 Viscosity Cup Viscosity measurement condition is the viscosity, which is based on a volume of the bopp tape at a given temperature from the predetermined viscosity of the diameter of the hole in the outflow time of the song represented.
3 instruments and equipment
3.1 rotational viscometer.
3.2 thermostatic bath: to maintain 23 ± 0.5 ℃ (can also use other adhesives claim temperature).
3.3 Thermometer: indexing of 0.1 ℃.
3.4 container: diameter of not less than 6cm, 11cm height of not less than container or container that comes with a rotational viscometer.
3.5 Viscosity Cup: 1-4 viscosity cup capacity greater than 50mL. Specifications and dimensions shown below:
D holes are as follows:
d (1) = 1.778 ± 0.003
d (2) = 2.54 ± 0.003
d (3) = 3.81 ± 0.003
d (4) = 6.35 ± 0.003
1-4 Viscosity Cup
3.6 Stopwatch: accuracy of 0.2s.
3.7 cylinder: 50mL.
3.8 thermostatic chamber: to maintain 23 ± 0.5 ℃
4 Sample
4.1 specimen should be evenly without bubbles.
4.2 the amount of sample to be able to meet rotational viscometer and viscosity cup measurement needs.
5 test procedure
5.1 rotational viscometer method:
5.1.1 The same kinds of samples should select the appropriate rotor and the same speed, so that reading is within the range of the dial 20% to 80%.
5.1.2 The sample is placed in a container filled with a constant temperature bath, the temperature of the sample and the test temperature equilibrium and maintain the sample temperature uniformity.
5.1.3 The vertical rotor immersed in the central part of the specimen, and the level reaches the rotor level marking (to be fitted with a protective frame).
5.1.4 starting rotational viscometer readings at the same time on the disc read pointer rotation.
5.1.5 Each sample was measured three times.
5.2. Viscosity Cup:
5.2.1 wiped viscosity cup, and dried or cold dry air, light cup viscosity was observed outflow hole should be cleaned.
5.2.2 The sample was placed in a constant temperature and viscosity cup room thermostat.
5.2.3 The viscosity cup and 50mL graduated cylinder mounted vertically on the bracket, the outflow from the cylinder hole bottom surface 20cm, and in the following viscosity cup outflow hole put a 50mL graduated cylinder.
5.2.4 hand to block the outflow hole, filling the viscosity of the sample cup.
5.2: 5 Release your finger to the sample flow. Recording time the finger is removed outflow hole to accept the measuring cylinder when the sample reaches 50mL to flow time (s) as the sample viscosity.
5.2.6 determination to do it again, the difference between the measured value of the secondary should not exceed 5% of the average.
6 The results are shown
6.1 rotational viscometer method, take a minimum of three samples test readings, taking the effective number three.
6.2 viscosity cup method, the results of the arithmetic mean value, whichever is the effective number three.
7 Measurement Results
7.1 rotational viscometer: The readings are calculated according to the provisions of the viscometer to Pa · s or mPa · s representation.
7.2 Viscosity Cup Method: s said.
8 Test Report
The test report should include the following:
a. Sample source, name, kind;
b. The rotational viscometer model, rotor speed or the viscosity of the cup with a numeral;
c. Test temperature;
d. Viscosity values.

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