Pushen HNQ Backtack tester

HNQ

Backtack tester

Determination of the film after drying due to a certain temperature and Humidity and adhesion phenomenon, weight 500g, bottom area of 1c m2, stainless steel material, meet the standard GB/T 1762.

use

The paint film tack back tester is designed and manufactured according to the GB1762-80 standard. It is mainly used to measure the adhesion phenomenon of the paint film after it is dried due to the influence of a certain temperature and humidity. Tackback typically occurs in products such as oil-based paints and oil-based paints.

technical indicators

Paint film back tack tester weight 500g±5g bottom area/square centimeter

Equipment and Utensils

1. 20×20mm medium-speed quantitative filter paper. (bring your own)

2. 50×120×0.2mm tin plate. (bring your own)

3. Temperature and humidity control box DL302 (self-provided)

4. 4x magnifying glass. (bring your own)

Operation and usage steps

test methods

Prepare the paint film on the tin plate according to the brushing method of "General Preparation Method of Paint Film" (GB1727-79). Dry for 48 hours under constant temperature and humidity conditions after painting. Place the filter paper with the glossy side down on the paint film at a distance of not less than 1 cm from the edge of the sample, put it in a temperature and humidity control box, and preheat the filter paper at a temperature of 40±1 degrees Celsius and a relative humidity of 80±2%. Put the back viscosity tester in the middle of the filter paper, and close the temperature and humidity control box. Rise to a temperature of 40 ± 1 degrees Celsius within 5 minutes, and a relative humidity of 80 ± 2%, maintain this condition for 10 minutes, quickly remove the measuring device vertically, and take out the sample. Place it under constant temperature and humidity conditions for 15 minutes, and observe the results with a four-fold magnifying glass. 2. Rating

(1) The model is turned upside down, and the filter paper can fall freely, or tap a few times with the index finger of the hand holding the plate, and the filter paper can fall down as grade 1.

(2) Gently lift the filter paper sheet, allowing impressions, sticking with sparse and slight filter paper fibers, and the total area of the fibers is less than one-third of the square centimeter, which is grade 2.

(3) Gently lift the filter paper sheet to allow impressions and dense filter paper fibers, and the total area of the fibers is less than one-third square centimeters to one-half square centimeters as grade 3.

 During the inspection, three samples are prepared for each sample at the same time for measurement, and the grade of the two samples with the same results is the evaluation result.

Maintenance and Storage

After the sample is finished, the bottom surface of the paint film stickiness tester should be scrubbed clean, put into the instrument box, and placed in a clean and dry place to avoid corrosion and affect the use of the instrument.

Packing list：Backtack tester X1

[Note]Because the manufacturer's packaging may be updated or upgraded, the detailed packaging list shall be subject to the latest standard configuration of the manufacturer.