english How to Test the Scratch Resistance of Stone Protective Films
2025-07-31
Protective Film Scratch Resistance Testing Methods
Comprehensive evaluation methods to determine the durability and protective qualities of surface films under various conditions.
1 Simulated Daily Friction Test
- Use common hard cloth or plastic object for back-and-forth rubbing
- Maintain constant force and frequency throughout testing
- Primary observation points: scratches, wear patterns, and gloss changes
- Simulates typical frictional contact during daily use
- Evaluates resistance to minor abrasions and surface wear
Note: Testing duration should represent expected product lifespan under normal use conditions.
2 Sharp Object Scratch Test
- Utilize sharp metal objects of varying hardness (blades, keys, etc.)
- Perform controlled scratches at multiple angles
- Begin with light touch, gradually increasing force until visible marks appear
- Measure and record: scratch depth, length, and quantity
- Document threshold force required to produce visible damage
Important: Maintain consistent testing angles (typically 45° and 90°) for comparable results.
3 Pressure Variable Test
- Conduct with specialized pressure application equipment
- Apply gradually increasing pressure while sliding test object
- Monitor for: surface cracking, film peeling, and substrate damage
- Simulates heavy object dragging scenarios
- Evaluates performance under extreme pressure and friction
Recommendation: Test multiple pressure levels to establish performance curve.
4 Environmental Impact Testing
- Expose samples to varied conditions: humidity, high temp, low temp
- Perform standard scratch tests post-exposure
- Compare results across environmental treatments
- Assesses material stability under real-world conditions
- Ensures consistent protective performance in actual use
Critical: Allow proper acclimation time between environmental exposure and testing.
These standardized methods provide comprehensive evaluation of protective films' scratch resistance, durability, and environmental stability for quality assurance and performance validation.
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