Definition
Alcohol rubber friction resistance tester is a special testing equipment used to evaluate the ability of the surface coating or printing layer of a material to resist the combination of alcohol and rubber under specific friction conditions. The device provides quantitative data support for product quality control and R&D by simulating the wiping behavior that may be encountered in actual use.
How it works:
The equipment is designed based on the principle of reciprocating frictional motion. During testing, a specified size of rubber is fixed to a specific fixture and touched to the sample surface with standard pressure. The alcohol is applied to the friction area in a controlled manner, and the device drives the eraser to make a specified number of reciprocating movements across the sample surface. During the friction process, alcohol acts as a solvent, and the eraser provides mechanical friction, simulating the actual wiping scene. The equipment is usually equipped with counters and motion control systems to ensure the consistency of the parameters of the testing process.
Measurement method
Tests should be carried out in accordance with relevant standards (such as standards in the fields of packaging and printing, surface treatment of consumer goods, etc.). First, a standard-sized sample is prepared and fixed on the test platform. Choose the specified type of eraser and alcohol of concentration (e.g. 75% ethanol solution). Set equipment parameters, including friction stroke, frequency, load, and number of cycles. After starting the device, the rubber rubbed the sample back and forth in the alcohol-wetted state. After the test is complete, the sample surface is evaluated for wear, fading, or coating peeling through visual comparison or an instrument such as a colorimeter. The results are often expressed in the form of "the maximum number of frictions that can be withstood without significant changes" or the color difference value ΔE after a certain number of times.
Influencing factors
Test results are influenced by multiple factors. The properties of the material itself, such as coating adhesion, ink layer curing degree and substrate properties, are decisive factors. In the test parameters, the alcohol concentration and volatilization rate, rubber hardness and material, applied vertical pressure, friction velocity and contact area will all change the friction strength. Environmental conditions such as temperature and humidity can affect the volatilization rate and material state of alcohol. Consistency in sample preparation, including surface flatness and cleanliness, is also key to ensuring data comparability.
Applications:
This device is widely used in industries where surface durability needs to be verified. In the field of packaging and printing, it is used to test the anti-rubbing properties of labels and patterns on outer packaging such as food and cosmetics. Consumer electronics industry to evaluate the alcohol-resistant cleaning ability of housing coatings, button markers. In the test of automotive interior parts, it is used to test the durability of the surface treatment of the instrument panel and control panel. In addition, it is also commonly used in the quality control of stationery, home appliances and industrial products.
Equipment selection
The selection should comprehensively consider the testing requirements and technical parameters. The core parameters include friction stroke range, frequency adjustability, pressure control accuracy, and counting capacity. The equipment should have a stable reciprocating motion mechanism and a corrosion-resistant design to adapt to the alcohol environment. It is recommended to focus on whether the equipment complies with the standard methods widely adopted by the target industry (such as ASTM, ISO, GB/T, etc.). The operation interface should be intuitive, easy to set parameters and read data. In terms of safety, protective covers and emergency stop functions should be considered. In addition, the supplier's technical support capabilities and the availability of calibration services are also considerations for long-term use.