Portable Table Top Lab Sample Pulverizer Description:

The PNLP series laboratory pulverizer micronizer is a compact, precision grinding system for producing ultra-fine powder samples in R&D, quality control, and pilot plant environments. The defining capability of this unit is its 10–400 mesh output range — extending from standard coarse powder (10–30 mesh) down to micron-range ultra-fine powder (300–400 mesh, approximately 37–50 µm). This range covers sample requirements from rotomolding powder trials at the coarse end to SLS laser sintering powder evaluation and pharmaceutical particle size analysis at the fine end.

The PNLP operates in two temperature modes without hardware modification. Ambient mode uses the built-in cooling system for thermoplastics and other room-temperature-processable materials. Cryogenic mode introduces liquid nitrogen into the grinding chamber, embrittling elastic, heat-sensitive, or tacky materials (rubber, TPU, waxes, EVA at high VA content) to achieve clean fracture and consistent ultra-fine particle generation that would not be achievable at room temperature.

Key hardware features: 8-inch abrasive-resistant grinding discs, built-in flywheel blower for pneumatic conveying from disc to sifter, single-deck sifter for real-time particle classification at processing rates up to 50 lbs/hr (approximately 23 kg/hr). The system is self-contained — no external utilities required except an electrical supply and, for cryogenic mode, a liquid nitrogen connection. Fitted with casters for repositioning between lab stations.

What makes a “micronizer” different from a standard lab pulverizer? A standard laboratory disc pulverizer typically operates in the 20–120 mesh range for plastics and polymer applications. A micronizer is optimised for the sub-100 mesh range — finer disc gap tolerances, higher-precision sifting, and (typically) cryogenic capability for materials that cannot achieve sub-100 mesh fineness at ambient temperature. The PNLP covers both ranges in a single unit, making it the broadest-capability option in the laboratory pulverizer category.

Portable Table Top Lab Sample Pulverizer Advantages：

Self-contained operation — no external services required. The PNLP requires only an electrical supply and (for cryogenic mode) a liquid nitrogen connection. No compressed air line, dedicated exhaust duct, or external classification equipment is needed. This allows installation in standard laboratory spaces without facility modification.

10–400 mesh in one machine. The same unit produces both coarse plastic powder (10–30 mesh for rotomolding or compounding trials) and ultra-fine micron-range powder (200–400 mesh for SLS powder evaluation, pharmaceutical particle analysis, or fine coating development) by adjusting the disc gap and sifter screen. No secondary micronizing equipment required for the fine end of the range.

Ambient and cryogenic modes — elastic and heat-sensitive materials included. The cryogenic mode uses liquid nitrogen to embrittle materials that deform rather than fracture at ambient temperature — rubber, TPU, EVA compounds, wax-based formulations, and certain adhesives. Switching between modes does not require hardware changes.

Minimal material waste between samples. The 10-lb hopper capacity and short internal conveying path minimise the amount of material held in the system between trials. Rapid cleaning between batches supports multi-material lab sessions with expensive or limited sample quantities.

Reproducible results — consistent speed, temperature, and feed rates. The integrated controller maintains stable operating parameters across a sample run, producing reproducible particle size data that can be reliably compared between trial batches or cited in R&D documentation.

Mobile, compact footprint. 49″ L × 30″ W × 112″ H overall, mounted on casters. Fits in standard laboratory aisles and can be moved to different work areas or cleanroom-adjacent spaces without tools.

 Technical Features

• 10–400 mesh output range — the broadest fineness range of any unit in the WANROOETECH laboratory pulverizer series; covers coarse plastic powder for moulding trials through to ultra-fine micron-range powder for SLS evaluation and pharmaceutical applications.
• 8-inch abrasive-resistant grinding discs — sized for laboratory throughput (up to 50 lbs/hr); disc gap adjustable via external mechanism for rapid changeover between target mesh settings without opening the grinding chamber.
• Built-in flywheel blower and 1-deck sifter — integrated pneumatic conveying and real-time particle classification in a single compact unit; no external classifier or conveying equipment required.
• Ambient and cryogenic modes — liquid nitrogen cryogenic capability for elastic, heat-sensitive, or tacky materials that cannot achieve target fineness at room temperature; mode switching requires only connecting the LN₂ supply.
• 5 HP motor, multi-voltage — 460/60/3, 380/50/3, and 415/50/3 configurations available; covers North American, European, and international laboratory electrical standards.
• Closed-loop design, contamination-free — sealed grinding chamber and enclosed conveying path prevents cross-contamination between batches; meets cleanliness requirements for pharmaceutical and food-grade sample production.

Frequently Asked Questions

What is the difference between a laboratory pulverizer and a laboratory pulverizer micronizer?

A standard laboratory pulverizer (such as the PNLP-200) typically operates in the 20–120 mesh range for plastic and polymer applications — coarse to medium particle size for rotomolding powder trials, masterbatch development, and compounding sample production. A micronizer is optimised for sub-100 mesh (fine to ultra-fine) output, with disc tolerances, sifter precision, and (typically) cryogenic capability designed for particle size ranges used in SLS powder evaluation, pharmaceutical formulation, and analytical sample preparation. The PNLP micronizer covers both ranges (10–400 mesh) in a single unit, making it the appropriate choice when a laboratory needs to produce samples across the full coarse-to-micron range without two separate machines.

What materials can the PNLP micronizer process in cryogenic mode, and what fineness is achievable?

Cryogenic mode with liquid nitrogen is used for materials that deform rather than fracture cleanly at ambient temperature — rubber, TPU, EVA at high VA content, soft PVC, wax-based compounds, certain adhesives, and some engineering resins with high impact modifier content. In cryogenic mode, the liquid nitrogen embrittles these materials before they reach the grinding disc, enabling consistent fine powder production. Achievable fineness in cryogenic mode is typically 30–50% finer (smaller D50) than ambient mode at the same disc gap setting. For SLS-compatible PA12 and PA11, cryogenic grinding is the standard production method for commercial powder — the PNLP produces lab-scale samples representative of cryogenic production powder for print trial evaluation.

What utilities are required to operate the PNLP micronizer?

In ambient mode, the only utility requirement is an electrical supply (5 HP / 3.73 kW motor; available in 460/60/3, 380/50/3, and 415/50/3 configurations). No compressed air, external exhaust, or cooling water connection is required — the built-in flywheel blower handles internal pneumatic conveying. In cryogenic mode, a liquid nitrogen supply is required in addition to the electrical connection. A standard 160–230 litre liquid nitrogen dewar placed adjacent to the machine provides adequate supply for a typical lab session. No permanent LN₂ piping installation is required — a flexible connection hose from the dewar to the machine inlet is standard.

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