Processing Machinery
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Black Speck Prevention and Control of Medical-Grade PEEK
Problem Phenomenon
Medical-grade PEEK products still occasionally show black speck impurities in clean production, the customer complaint rate is rising, and conventional cleaning means cannot stably eliminate them.
Cause Analysis
Black speck sources include equipment dead-spot carbonization, raw material contamination, environmental dust, and metal wear particles; the PEEK high-temperature process causes great equipment wear, and mixing in of metal debris from screw and barrel wear is a hidden source.
Solution
①Control the production environment according to ISO cleanroom standards; ②Use a metallographic microscope to analyze black speck composition for tracing; ③Regularly measure screw and barrel wear to evaluate service life; ④Manage raw materials in a sealed manner after opening to prevent contamination.
Key Takeaway
Medical PEEK black speck prevention and control is a three-in-one project of environment, equipment, and raw material; metallographic analysis is a sharp tool for tracing; screw wear management should be incorporated into the preventive maintenance plan.
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