JM-CN5B Constant Temperature Viscosity Tester (Five Stations)

Product Introduction

JM-CN5B constant temperature stickiness tester  is designed and manufactured in accordance with GB 4851 (pressure-sensitive adhesive tape stickiness test method) and paste adhesion measurement method standards, and is suitable for pressure-sensitive adhesive tape, self-adhesive, paste, hot-soluble adhesive and other products for stickiness test.

Test Principle:

Hang the test plate affixed with the adhesive sample vertically on the test frame, and hang the weight of the specified weight at the lower end. The displacement of the sample after a certain period of time, or the time for the sample to completely disengage, is used to characterize the ability of the adhesive sample to resist pulling. (as shown in the figure)

Design Criteria:

GB 4851 -2014 Test method for adhesive tape retention

JIS Z0237 Test method for pressure sensitive adhesive tapes and pressure sensitive adhesive sheets 　

ASTM D3654 Test Method for Shear Viscosity of Pressure Sensitive Zones

YY/T0148, CNS-11887 11888 PSTC-7 YYT0148 etc

How To Operate:

1. After removing the 3 to 5 loops of adhesive tape on the outermost layer of the adhesive tape test paper, unwrap the sample roll at a rate of about 300 mm/min (the isolation layer is also peeled off at the same rate for the sheet-like sample), and cut samples with a width of 25 mm and a length of about 100 mm in the middle of the adhesive tape at intervals of about 200 mm. Unless otherwise specified, the number of samples in each group is not less than three;

2. Scrub the test plate and loading plate with a wiping material dipped in cleaning agent, then carefully dry them with clean gauze, and wash them three times. Above, until the working surface of the board is visually inspected to be clean. After cleaning, do not touch the working surface of the board with hands or other objects;

3. At a temperature of 23 ° C ± 2 ° C and a relative humidity of 65% ± 5%, stick the specimen parallel to the longitudinal direction of the plate in the middle of the adjacent test plate and the loading plate according to the dimensions specified in Figure 2. Roll over the specimen with a pressure roller at a speed of about 300 mm/min. Note that when rolling, only the force generated by the weight of the pressure roller can be applied to the specimen. The number of rolls can be specified according to the specific product conditions, if not specified, the reciprocating rolling is three times;

4. After the specimen is pasted on the plate, it should be placed at a temperature of 23 ° C ± 2 ° C and a relative humidity of 65% ± 5% for 20 min. Then fix the test plate vertically on the test rack of the instrument, and gently connect the loading plate and the weight with a pin.

5. Place the instrument horizontally, turn on the power switch, heating switch, and fan switch in turn, and press the raised part on the timer to clear the time. The instrument automatically turns on according to the preset temperature until the temperature in the test chamber is constant to the set value;　

6. After reaching the specified time, remove the weight. Use a magnifying glass with indexing to measure the amount of displacement of the sample sliding down, accurate to 0.1mm; or record the time for the sample to fall off the test plate. The number of times is greater than or equal to 1h, in min, and less than 1h in s.

Main Technical Parameters: