Scratch resistance testing machine is a testing device used to quantitatively evaluate the scratch resistance of material surfaces. It is widely used in quality control and research and development testing in fields such as coatings, plastics, metals, films, automotive interiors, and electronic product casings.
The scratch strength testing machine simulates the external forces such as scratching and friction that may be encountered on the surface of objects in reality to test the surface hardness, adhesion, and wear resistance of materials. The working principle of different types of scratch strength testing machines varies. For example, the scratch pen/scratch tester is manually or semi-automatic controlled by a metal needle tip or a hard indenter to scratch the surface of the material with adjustable pressure. The scratch resistance is evaluated by observing the width, depth, and other characteristics of the scratch; The reciprocating scratch testing machine is driven by a motor to move a hard indenter back and forth on the surface of the material and apply constant pressure. The scratch resistance performance is quantified by the wear amount and color difference changes of the scratch.
The scratch resistance testing machine simulates the scratch behavior in actual use, applies controllable forces and motion trajectories to the material surface, and quantitatively evaluates its scratch resistance performance. Common testing methods include:
Linear scratching method: The scraping needle moves along a straight line at a constant speed across the surface of the material, recording the scratch morphology (such as depth and width) or surface changes (such as color difference and loss of glossiness).
Rotating Scratching Method: The scraping needle rotates around a fixed axis to form a circular scratch on the surface of the material, which is suitable for evaluating the scratch resistance of circular or curved samples.
Multi directional scratching method: Combining linear and rotational motion to simulate complex scratching scenarios (such as key scratches, gravel friction).
During the testing process, the equipment can synchronously monitor parameters such as scratching force, displacement, friction coefficient, etc., and analyze scratch characteristics through auxiliary tools such as microscopes and colorimeters.
Application field
Automotive industry: used to test the scratch resistance of car body paint, interior plastic parts, seat leather, etc.
Electronics industry: Scratch resistance testing can be conducted on tempered film for mobile phones, laptop casings, smart watch dials, etc.
Furniture and building materials industry: suitable for abrasion resistance testing of solid wood flooring, cabinet door panels, ceramic tile glaze, etc.
Packaging and printing industry: commonly used to test the scratch resistance of food packaging film, carton printing ink, cosmetic packaging box surface coating, etc.