PP PE EVA PS TPU ABS HDPE Laboratory Disc Pulverizer Description:

The PNLP series laboratory disc pulverizer produces sample powder from a broad range of thermoplastics, elastomers, and engineered resins for R&D, quality control, and formulation development. Depending on the material’s thermal sensitivity and mechanical behaviour, the PNLP operates in either ambient (air or water cooling) or cryogenic (liquid nitrogen) mode — and in some cases, both modes are viable with different trade-offs in particle size and throughput.

This page provides a material-by-material overview of the seven most commonly processed materials in this machine’s title — PP, PE, EVA, PS, TPU, ABS, and HDPE — covering the recommended processing mode, typical output mesh, and key processing considerations for each. For deeper coverage of specific applications within the laboratory pulverizer range, see the linked specialist pages below.

The PNLP-200 is the standard model for all seven materials: 203 mm disc diameter, 3.75 kW motor, 1–25 kg/h output, ≤3 mm input particle size. Input material must be pre-granulated before feeding.

PP PE EVA PS TPU ABS HDPE Laboratory Disc Pulverizer Advantages:

Material Processing Guide

Processing mode summary:

• Ambient-only (no cryogenic needed): PP, PS, ABS, standard HDPE, standard LLDPE
• Cryogenic recommended or required: EVA (VA >14%), TPU, soft rubber, elastomer compounds, highly plasticised PVC
• Either mode depending on grade: PE/HDPE (standard grades → ambient; softer or higher-MFI grades → cryogenic for fine powder)

Technical Features

• Ambient and cryogenic modes in one unit — no hardware modification required to switch between modes; operator connects liquid nitrogen supply and selects cryogenic mode via the control panel.
• 203 mm disc, adjustable gap — covers 20–120 mesh output range across all seven materials listed; gap adjusted via external mechanism without opening the grinding chamber.
• ≤3 mm input particle size — all input material must be pre-granulated; the PNLP is a fine-grinding machine, not a primary size reduction unit.
• 1–25 kg/h output — appropriate for sample production quantities (0.5–5 kg batches); not suited for production-scale powder requirements.
• Compact, mobile — 922 × 671 × 1,793 mm, casters standard; no dedicated installation required beyond electrical supply (and LN₂ for cryogenic mode).
• Versatile across material types — single unit covers thermoplastics, elastomers, and engineered resins; material changeover by cleaning the disc and chamber between batches.

Frequently Asked Questions

Which of these seven materials require cryogenic mode, and which can be ground at ambient temperature?

Of the seven materials in the title: PP, PS, ABS, and HDPE grind well in ambient mode — all are relatively rigid at room temperature and fracture cleanly under disc shear. EVA and TPU require cryogenic mode — EVA softens at 60–80°C (within the range of disc friction heat) and TPU is highly elastic and deforms rather than fracturing at ambient temperature. PE and LLDPE fall in between: standard-MFI grades grind adequately in ambient mode for coarse powder (20–40 mesh), but finer targets or soft/high-MFI PE grades produce more consistent powder in cryogenic mode. When in doubt for a specific grade, starting in cryogenic mode produces a more conservative baseline for particle size distribution.

Does this machine come with a sifter for particle size classification?

The standard PNLP-200 configuration does not include an integrated sifter — powder discharges from the grinding chamber and is collected directly. For applications requiring classified powder at a specific mesh cut, a separate laboratory sieve or classifier is needed downstream. The PNLP Micronizer configuration (see Laboratory Pulverizer Micronizer page) includes an integrated 1-deck sifter for real-time particle classification during grinding — appropriate for applications requiring tighter particle size control at the 10–400 mesh range.

How do I choose between this machine and the other PNLP lab configurations?

The choice depends on three factors: material type, required fineness, and application context. This standard PNLP-200 covers the broadest material range (PP, PE, EVA, PS, TPU, ABS, HDPE and more) for general R&D and QC sample production at 20–100 mesh. The Micronizer adds integrated sifting and extends the range to 400 mesh for ultra-fine applications. The Medicine/Food Grade unit adds GMP documentation support. The Rubber/Adhesives unit adds an auger feeder for tacky, non-free-flowing materials. If your material is in this page’s title list and your application is standard R&D or QC sample production, the PNLP-200 in this configuration is typically the right starting point.

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