Method for testing original viscosity of adhesive by adopting vertical tension method

Abstract

The invention relates to a method for testing the original viscosity of an adhesive by adopting a vertical tension method, belonging to the field of viscosity tests of adhesives and comprising a tension tester. The method is technically characterized by comprising the following steps: firstly, a clean steel ball is vertically hung on the tension tester through a stayguy; secondly, an adhesive tape is flatly adhered to a carrying platform arranged below the clean steel ball; and thirdly, the tension tester is started to enable the clean steel ball to descend with uniform speed of 250 to 350 mm / min until the clean steel ball is in a stationary state on the surface of the adhesive tape, and then the clean steel ball is fast lifted upwards with speed of 250 to 350 mm / min through the tension tester until the clean steel ball leaves the adhesive tape, and the tension tested by the tension tester is the original viscosity of the adhesive. After improving the prior art, the invention has the advantages that the method can test the adhering performance of a single mark, and has accurate test value and little error.

Description

technical field [0001] The invention belongs to the field of adhesive viscosity testing, in particular to a method for testing the initial viscosity of adhesives by adopting a vertical tension method. Background technique [0002] At present, in this industry, the following four methods are mostly used to test the initial viscosity of adhesives: [0003] 1. Rolling ball plane stop test method: This method is adopted by the United States and formulated as one of the national standards for the initial adhesion performance test of pressure-sensitive adhesive products, namely ASTMD-3121-73. During the test, a steel ball with a diameter of 11.1mm is dropped from the The top of the inclined slope with a height of 65.1 mm and an angle of α with the horizontal plane rolls down, rolls over the adhesive surface of a flat and horizontally placed pressure-sensitive adhesive product, and stops due to the viscosity of the pressure-sensitive adhesive. The distance L is The measure of the ...

AI Technical Summary

Problems solved by technology

[0009] 2) The error is greatly affected by objective factors, such as temperature, the fluidity of the adhesive, the uniformity of the coating and the coefficient of friction of the adhesive. Therefore, the dispersion of the test results is too large, especially for synthetic rubber. The test results of acrylic adhesives are very different from the actual feel

[0011] 1) The rigidity and softness of the substrate have a great influence on the test results

[0012] 2) Different test sections and peeling angles are also changing, so the measured values ​​of different test sections may vary greatly

[0013] Therefore, the testing methods in the prior art are difficult to accurately test the parameter value of the initial viscosity, which has caused many adverse effects on the normal production of the enterprise and directly affected the stability of the final product quality.