Liquid Nitrogen Cryogenic Pulverizer
Laboratory Liquid Nitrogen Cryogenic Grinder for Polymer and Elastomer Materials
Item Number: PP-LN10
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Product Overview
This liquid nitrogen cryogenic grinder integrates cryogenic cooling with a high-speed impact mill to address the persistent challenge of pulverizing tough, heat-sensitive materials. By flooding the grinding chamber with liquid nitrogen, it lowers the material’s temperature below its glass transition point, making it brittle and easy to fracture with minimal applied energy. The result is a fine, uniform powder that retains the original chemical properties—essential for accurate analytical testing and quality assurance.
Industries ranging from plastics manufacturing and petrochemicals to academic research and environmental analysis depend on this equipment for sample preparation. It is particularly effective for polyethylene, polypropylene, polystyrene, PET, thermoplastic polyurethane, natural rubber, and biodegradable polymers such as PLA and PBS. In these applications, preventing thermal degradation and achieving consistent particle size are critical for valid test outcomes.
Every component of this grinder, from the fluid-dynamically contoured blades to the cryogenic-rated seals, is engineered for durability and performance under continuous operation. Laboratories worldwide have validated its reliability, making it a trusted workhorse for both routine QC and advanced material research.
Key Features
- Cryogenic Cooling with Precision Flow Control: Liquid nitrogen is metered through a custom stainless steel ball valve engraved with an opening-angle scale, allowing the operator to precisely adjust the flow. This ensures consistent embrittlement of samples across varying material types and batch sizes.
- High-Speed Impact Grinding Mechanism: A 25,000 r/min motor drives multi-edge winged blades, the result of fluid dynamics optimization. The high-energy impact and vortex action reduce materials to a uniform fineness adjustable between 40 and 350 mesh, even for elastic polymers.
- Continuous Operation with Cyclone Separation: The screen-less wind screening system, coupled with a bag collector, enables uninterrupted feeding and discharge. It maintains high throughput (0.5–10 kg/h) while delivering narrow particle size distributions, critical for reproducible analytical results.
- Robust, Tiltable Housing for Easy Cleaning: The main body can be tilted, simplifying access to the grinding chamber for cleaning between samples. All contact parts, including collection vessels and bags, are washable, making material changeovers quick and contamination-free.
- Cryogenic Sealing with Fluoroelastomer: Custom O-rings made from advanced low-temperature fluorocarbon rubber maintain a tight seal under cryogenic conditions, preventing liquid nitrogen leakage and significantly extending service intervals compared to standard seals.
- Integrated Electric Liquid Nitrogen Pump: The air pump that pressurizes the dewar is built directly into the main housing, eliminating external tubing clutter. This electric system reduces manual labor and provides steady, adjustable pressure for reliable coolant flow.
- Versatile Dual-Mode Operation: Without liquid nitrogen, the grinder functions as a standard high-speed mill for non-cryogenic materials, expanding its usefulness in laboratories that process a variety of sample types. This flexibility maximizes equipment utilization.
- Small-Footprint, Portable Design: With host dimensions of just 32 × 25 × 85 cm and a weight of 18 kg, the system fits easily on crowded benchtops. Its modular construction allows disassembly for transport or storage, a key advantage for shared laboratory spaces.
- Advanced Safety and Monitoring: A digital ammeter provides real-time current display, helping operators monitor load and prevent motor overload. Ergonomic controls and quiet operation enhance user comfort during extended runs.
- Expandable Accessories: Optional upgrades include a self-pressurizing liquid nitrogen dewar or an intelligent liquid nitrogen pump with automatic flow control and level monitoring, enabling more sophisticated, unattended operation for high-throughput labs.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| Plastic Raw Material Testing | Grinding PE, PP, PET, PS, PBS, TPU pellets or scraps for analytical testing such as FTIR, DSC, or melt flow index. | Produces consistently fine powders (40–350 mesh) without thermal degradation, preserving original chemical properties for accurate results. |
| Biodegradable Polymer Research | Cryogrinding PLA, PHA, or starch-based plastics to study degradation behavior or prepare samples for microbial assays. | Low-temperature processing prevents heat-induced changes, ensuring representative microplastic properties for valid experiments. |
| Rubber and Elastomer Processing | Pulverizing natural rubber, silicone, or thermoplastic elastomers for quality control or compound development. | Overcomes toughness and heat sensitivity, achieving uniform fine particles for reliable material characterization. |
| Petrochemical and Polymer QC | Sample preparation in refineries or polymer manufacturing for catalyst analysis, gel content, or additive assessment. | High-speed impact with continuous feeding boosts throughput, reducing turn-around time for repetitive testing. |
| Laboratory Research and Education | Use in university or institutional labs for material science experiments, method development, or student training. | Compact, easy to operate, and versatile; handles a wide range of materials from hard plastics to fibrous substances. |
| Waste Recycling Analysis | Grinding post-consumer plastic waste or composites for composition analysis and recycling feasibility studies. | Reliable performance on mixed or contaminated samples, supporting sustainable material research initiatives. |
| Fiber and Composite Materials | Cryomilling fiber-reinforced polymers or composites to liberate fibers for morphological or mechanical analysis. | Gentle yet effective disintegration without fiber damage, providing clean samples for accurate evaluation. |
| Small-Batch Pre-Production | Producing limited quantities of fine polymer powders for prototyping, additive manufacturing, or specialty coatings. | Scalable capacity (10 g to 10 kg/h) allows transition from lab to pilot scale while maintaining product consistency. |
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | PP-LN10 |
| Name | Liquid Nitrogen Cryogenic Grinder |
| Main Motor Power | 1.8 kW |
| Voltage | 220 V / 50 Hz |
| Low-Temperature Grinding Fineness | 40–350 mesh |
| Processing Capacity | 0.5–10 kg/h |
| Minimum Processing Quantity | 10 g |
| Dewar Capacity | 30 L (optional 50 L) |
| Rated Current | 8 A |
| Current Display | Digital |
| Feeding Method | Continuous |
| Discharge Method | Wind screening without sieve |
| Collection Method | Bag collection |
| Rotation Speed | 25,000 r/min |
| Cooling Medium | Liquid nitrogen |
| Blade Type | Multi-edge winged blades |
| Grinding Principle | High-speed impact |
| Liquid Nitrogen Output Method | Electric liquid nitrogen pump |
| Flow Control | Graduated ball valve |
| Air Pump Installation | Built-in inside housing |
| Host Weight | 18 kg |
| Host Dimensions | 32 x 25 x 85 cm |
| Optional Accessories | Self-pressurizing dewar, intelligent liquid nitrogen pump |
| Note | Ensure adequate ventilation; use low-temperature protective gear. |
Why Choose This Product
- Proven Engineering Excellence: This system is built on a legacy of high-speed milling technology refined with in-house cryogenic innovations. The multi-edge blade geometry is a product of fluid dynamics modeling, maximizing impact efficiency while minimizing energy waste. Combined with a precision-machined grinding chamber, it delivers superior fineness and uniformity batch after batch.
- Uncompromising Durability and Safety: From the custom fluoroelastomer seals to the built-in current monitoring, every detail is designed to extend service life and protect the operator. The use of corrosion- and cold-resistant materials ensures that the unit withstands the rigors of daily cryogenic service without performance drift.
- Operational Flexibility and Scalability: With a wide capacity range from 10 grams to 10 kg per hour, the grinder adapts to both micro-analysis and small-batch production. Its ability to switch between cryogenic and ambient modes, along with upgradeable liquid nitrogen control systems, future-proofs the investment against evolving laboratory needs.
- Backed by Responsive Support: Our application engineers provide pre-sales consultation to help you select the optimal configuration, including dewars and pump options. After purchase, our global service network offers prompt technical support, training, and spare parts availability, minimizing your downtime.
- Cost-Effective Precision: While the initial outlay may be higher than basic grinders, the reduced material waste, faster throughput, and avoidance of retesting due to inconsistent samples translate to a rapid return on investment. This is a strategic asset for serious laboratories committed to data quality.
Contact our team today to discuss your specific grinding requirements and receive a customized quotation.
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