PA66 Pulverizer Nylon Plastic Powder Making Machine Description:

The PNMF series nylon PA66 pulverizer produces PA66 engineering plastic powder using a centrifugal disc grinding mechanism. PA66 is one of the more challenging materials to pulverise among common thermoplastics: its high melting point (265°C), toughness, and moisture absorption all require specific handling that standard plastic pulverisers are not optimised for.

Pre-drying is mandatory. PA66 granules absorb atmospheric moisture readily. At moisture content above approximately 0.2%, the heat generated during disc grinding causes absorbed moisture to act as a plasticiser, making particles sticky rather than brittle — the result is clumped, poorly flowing powder rather than free-flowing fine powder. PA66 input material should be dried to below 0.2% moisture (typically 4–6 hours at 80°C in a dehumidifying dryer) before entering the pulveriser.

Cooling is critical. The combination of PA66’s high toughness and high melting point means the disc generates more friction heat per unit of material than lower-hardness plastics. The PNMF dual cooling system (fixed disc water-cooled cavity + rotating disc atomised spray) is sized to maintain disc temperature below the threshold where PA66 particles begin to soften at their contact surfaces. For high-volume continuous production, an external chiller connection is available as an optional accessory.

Output: 20–120 mesh at 30–800 kg/h across five PNMF models (PNMF-300 to PNMF-800). Full machine specifications and working principle are on the PNMF product page.

PA66 Pulverizer Nylon Plastic Powder Making Machine Technical Features:

• Pre-drying requirement — PA66 specific — PA66 input must be dried to below 0.2% moisture content before pulverising. Feeding wet PA66 granules produces sticky, clumped powder rather than free-flowing fine powder. Dehumidifying dryer (sold separately) recommended upstream.
• Dual water-and-air cooling — sized for high-toughness materials — fixed disc water-cooled cavity and rotating disc atomised spray cooling run simultaneously; critical for PA66 which generates higher friction heat per kg than lower-melting plastics. External chiller connection available.
• Adjustable output fineness (20–120 mesh) — disc gap adjusted via feeler gauge during operation. Powder coating applications typically require 80–120 mesh; compounding and recycling applications 40–60 mesh.
• Segment blades for PNMF-600/800 — resharpenable 4–5 times before replacement; reduces consumable cost in continuous PA66 powder production where higher material hardness accelerates blade wear compared to softer polyolefins.
• Sealed milling chamber — no dust leakage; important for nylon powder which is a fine combustible dust (PA dust has a defined MIE — minimum ignition energy — and requires appropriate dust collection and grounding).
• SKF bearings, Siemens motor — standard specification; selected for continuous-duty reliability in engineering plastic powder production environments.

PA66 Pulverizer Nylon Plastic Powder Making Machine Components:

Vibratory Feeding Feeds pre-dried PA66 granules into the disc centre at a metered rate; built-in magnetic element captures any ferrous contaminants before they reach the grinding surfaces.	Pulverizer Disc Centrifugal disc with adjustable gap; dual cooling (fixed disc water-cooled cavity + rotating disc atomised spray) is the primary mechanism for managing friction heat during continuous PA66 grinding.
Whole Body Pulverizer Blade Standard for PNMF-300 to PNMF-500; customisable tooth geometry to match PA66 hardness and target mesh specification.	Segment Pulverizer Blade For PNMF-600/800; resharpenable 4–5 times — recommended for PA66 production where higher material hardness versus polyolefins increases blade wear rate.
Temperature Control Thermostat-controlled solenoid valve pauses feed if disc temperature exceeds set threshold — prevents PA66 powder from softening at particle contact surfaces and agglomerating in the grinding chamber.	Vibrating Screen Real-time classification; on-spec powder discharges immediately, oversized particles return to the disc automatically. For powder coating applications, screen mesh is set to 80–120 mesh to meet coating specification requirements.
Bags Type Dust Catcher Standard dust control; for PA66 powder (combustible fine dust), ensure grounding of all ducting and collection equipment per applicable workshop dust explosion prevention guidelines.	Intelligent Control PLC panel with fault detection, error code display, and material-specific operating presets — useful when switching between PA6, PA66, and PA12 grades with different hardness and moisture sensitivity profiles.

PA66 Pulverizer Nylon Plastic Powder Making Machine Optional Components:

PA66 Pulverizer Nylon Plastic Powder Making Machine Application Areas:

For SLS-grade PA12 powder specifically, the cryogenic pulverizer is the standard specification — see the Cryogenic Pulverizer for ultra-fine, narrow-distribution powder production requirements.

Frequently Asked Questions

Why must PA66 be dried before pulverising?

PA66 is hygroscopic — it absorbs moisture from the atmosphere. At moisture content above approximately 0.2% by weight, the heat generated by disc friction during grinding causes absorbed moisture to partially plasticise the PA66 particle surface. Instead of fracturing cleanly under the disc, particles deform and stick together, producing agglomerated clumps rather than free-flowing powder. Pre-drying at 80°C for 4–6 hours in a dehumidifying dryer brings moisture content below the critical threshold. This applies to both virgin PA66 granules (if stored in humid conditions) and recycled nylon input material.

What mesh size is required for PA66 powder coating applications?

Powder coating with PA66 (and more commonly PA12 or PA11) typically requires 80–120 mesh (approximately 125–180 µm D50) with a tight particle size distribution. Coarser powder produces uneven film thickness on coated parts; too-fine powder below approximately 30 µm tends to agglomerate in the feed hopper. The PNMF disc gap is set to produce the target mesh and the vibrating screen classifies in real time to maintain distribution consistency. For the finest powder grades required by electrostatic powder coating lines (below 80 mesh), the cryogenic pulverizer may be a more appropriate specification.

Can this machine process other nylon grades — PA6, PA12, PA11?

Yes. PA6 (lower melting point at 220°C, slightly softer than PA66) is processed on the same PNMF platform with the same general approach but slightly less aggressive cooling requirements. PA12 (melting point 178°C, commonly used for powder coating and SLS) is softer and more heat-sensitive than PA66 — cooling management is equally important but for different reasons (lower melting point means thermal degradation threshold is closer to the operating range). PA11 is similar to PA12. For each grade, disc gap, feed rate, and cooling intensity are adjusted via the PLC panel. Pre-drying is required for all polyamide grades before pulverising.

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