To choose the right grade of melamine moulding powder (MMC) for dinnerware production, you must select A5 grade, ensure it is 100% unblended, and verify it meets international food-safety standards (like FDA or LFGB). Avoid cheaper A1 or A3 grades (which contain urea) for dining products.
A5 Grade (100% Melamine): The only acceptable grade for dinnerware. It features high heat resistance (-30°C to 140°C), good drop resistance, and prevents the leaching of harmful chemicals.
A1 & A3 Grades: Contain urea-formaldehyde. They are cheaper but highly toxic under heat, unstable, and must never touch food
2. Match the Form to Your Production Method
Granular Form: Best for standard compression molding. It is generally easier to pre-heat in a high-frequency machine, ensuring even flow across the mold for plates and bowls.
Fine Powder: Ideal for injection molding or items with intricate, deep-draw designs and sharp edges.
3. Surface Finish Requirements
Standard Matte/Glossy: Most common for solid-color or decal-decorated plates.
Glazing Powder (LG): A separate but essential pure-resin powder used after molding/decals to give the dinnerware a hard, porcelain-like, high-gloss finish.