For rubber hoses, abrasion resistance is one of the necessary properties. The good and bad abrasion performance of rubber is closely related to the quality of rubber materials. After produces the rubber hose, we will test it by a certain proportion. Abrasion test is one of them. The following is about the rubber abrasion performance test process.
The abrasion performance of rubber depends on its cohesive force and the adhesion of the friction surface, including the comprehensive influence of the tensile strength, elongation at break, fatigue resistance, viscosity energy of the base material. It cannot be said that the abrasion is related to a certain physical property.
Rubber DIN abrasion test belongs to abrasion, which is a kind of phenomenon that the rubber surface is micro-damaged by friction and falls off. Under a certain load pressure, the rubber sole test piece rotates at a certain Angle between the rubber wheel and the grinding wheel. As a result of the friction of the sharp points on the surface of the grinding wheel, local stress concentration occurs on the surface of the rubber. At the stress concentration point, the rubber is strongly torn apart, resulting in the loss of tiny particles and abrasion. When the sand wheel surface is sharp, it will make the rubber surface is scratched. And there are a parallel with the sliding direction of the mark belt, which is the characteristics of cutting wear and abrasion, abrasion is a form of manifestation.
Test conditions:
The material of rubber water hose, rubber oil hose, rubber air hose, etc. shall adopt the standard Akron abrasion test method.
In order to obtain high recurrence rate of test results, the test conditions must be strict. The test results show that the error of the Angle between the rubber wheel shaft and the sand wheel shaft, the hardness of the rubber wheel, the thickness of the rubber bottom plate and the ambient temperature all have certain influences on the test results. The greater the Angle between the rubber wheel shaft and the sand wheel shaft, the greater the attrition reduction. In addition, the hardness of the rubber wheel increases, the thickness of the test piece increases, the test temperature increases, will also increase the wear reduction.
Test procedure:
Remove the adhesive test wheel after pregrinding for 15-20min, brush the rubber chips, weigh them (accurate to 0.0019), and use the sample test after pregrinding. Remove and brush the rubber chips after 1.61km driving, and weigh them within 1h (accurate to 0.001g).
Several factors causing poor reproducibility of test results Through comparative analysis of various test conditions, we believe that the influence of instruments and equipment is the main one, especially the Angle between the rubber wheel shaft and the sand wheel shaft and the load borne by the sample, has a great influence on the test results.
Our factory strictly controls the abrasion performance of rubber hoses, the unqualified ones will be returned to be redone. Not only strictly control abrasion resistance, other necessary tests are also very complete, such as tensile strength test, high and low temperature resistance test, to ensure that the production of each hose are qualified. The rubber hose of our company is more wear-resisting, the service life is longer. You can rest assured choose and buy, warmly welcome to consult.