First, the sand dust test box uses blowing sand composed of quartz crystals with a sub-angular shape. The average roundness factor is 0.2, and the Mohs hardness is 7. The sand must contain at least 95% silica by mass. Its particle size distribution is as follows:
1. 0.5% to 1.5% passes through an 850µm sieve.
2. 1.2% to 2.2% passes through a 600µm sieve.
3. 13.8% to 15.8% passes through a 425µm sieve.
4. 36% to 38% passes through a 300µm sieve.
5. 27.6% to 29.6% passes through a 212µm sieve.
6. 11.7% to 13.7% passes through a 150µm sieve.
7. 4.2% to 6.2% remains on a 150µm sieve.
In addition to the blowing sand, the test box also requires dust particles made of angular silica powder. The dust should have a mass content of 97% to 99% silica. Its particle size distribution is as follows:
1. 100% passes through a 150µm sieve.
2. 96% to 100% passes through a 106µm sieve.
3. 88% to 92% passes through a 75µm sieve.
4. 73% to 77% passes through a 45µm sieve.
This specific composition ensures that both the sand and dust meet the required standards for testing environmental durability and performance under harsh conditions. The particle size distribution is carefully controlled to simulate real-world particulate exposure accurately. By using these materials, the test box can effectively evaluate the resistance of products to abrasive and dusty environments, ensuring reliability in various applications.
Halloween
Ideal fall decorations for home, indoor, outdoor, bedroom, patio, Garden, mantel, window, fireplace, door frame, outdoor fall decor for fall family parties, Halloween, Thanksgiving and Christmas Day.
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HISMOK(SHENZHEN)TECHNOLOGY CO.,LTD , https://www.will-trade.com