Matte Black Piano Hinge

Matte black piano hinge excels in resisting pollution from everyday exposure. Through surface energy tester analysis, the surface energy of the matte coating is 30 millinewtons per meter, which is lower than the common 42 millinewtons per meter of ordinary black coatings, so oil stains and fingerprints are not easy to adhere. After continuous installation tests by fifty operators, statistics show that the fingerprint residue area visible to the naked eye on the surface of the matte black piano hinge accounts for only 3% on average, while the fingerprint coverage area of ​​the glossy black hinge reaches 27%. Another chemical wiping resistance experiment showed that after repeatedly rubbing the coating surface with acetone-impregnated non-woven fabric for one hundred times with a load of one kilogram, the matte black area did not show any bottom or increase in gloss, and the color change Delta E was only 0.4, proving that the coating can withstand frequent contact with industrial cleaning agents and degreasing solvents.

From the perspective of anti-static and grounding reliability, this type of hinge also has practical value. Surface resistivity measurements confirmed that the resistance value of the matte black piano hinge coating at a relative humidity of 50% ranges from ten to the sixth power to ten to the eighth power of ohms, which is within the typical electrostatic dissipation range, while the resistance of ordinary insulating coatings often exceeds ten to the twelfth power of ohms. After 200,000 consecutive opening and closing times, the contact resistance between the hinge axis and the blade has always been stable below zero point one ohm. This is due to the black conversion film not only providing a matte appearance but also retaining the electrical continuity of the metal substrate. Tests on equipment door panels in flammable dust environments have shown that using matte black piano hinges can control the electrostatic accumulation voltage within fifty volts, which is far lower than the electrostatic discharge risk of more than 1,500 volts that often occurs with ordinary hinges.

 

About Us

 

Joyear Metalwork specializes in producing various types of piano hinges. More than 30 years of production experience has turned us into a leader in the industry.

 

Our products are exported to North America, Europe, Southeast Asia and other countries with high quality and excellent service.

 

 

 

 

 

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