CSY-L5B Plastic Pellet Moisture Analyzer

Overview

The CSY-L5B Plastic Pellet Moisture Analyzer is a dedicated loss-on-drying (LOD) instrument engineered for rapid, gravimetric moisture determination in thermoplastic polymer granules and raw materials. It operates on the fundamental principle of controlled thermal drying followed by real-time mass monitoring—complying with ASTM D6980, ISO 15512, and GB/T 2918 (Chinese national standard equivalent to ISO 291). Unlike conventional convection ovens, the CSY-L5B employs a halogen tungsten ring lamp as its infrared heating source, delivering uniform radiant energy directly into the sample matrix. This enables rapid, reproducible dehydration without surface charring or thermal degradation—critical for heat-sensitive polymers such as polyamide (PA), polycarbonate (PC), and polyethylene terephthalate (PET). The instrument integrates an electromagnetic force compensation sensor—a technology used in analytical-grade balances meeting OIML R76 Class I specifications—ensuring stable, drift-free weighing performance under variable ambient conditions.

Key Features

• Halogen tungsten ring lamp heating system: Provides rapid, homogeneous thermal energy transfer; achieves full drying in ≤8 minutes for most plastic pellets (e.g., PP, PE, PS, PVC)
• Electromagnetic force compensation weighing mechanism: 0.001 g resolution, <0.01% repeatability across 0–100 g range; immune to mechanical hysteresis and temperature-induced drift
• Real-time dynamic display: Simultaneous readout of moisture loss (%), elapsed time, chamber temperature, and current sample weight
• Three operational modes: Fully automatic (predefined drying profile), timed drying (user-set duration), and semi-automatic (manual endpoint confirmation)
• RS232 serial interface: Enables direct connection to laboratory printers, LIMS, or QC data management systems; supports FDA 21 CFR Part 11–compliant audit trail generation when paired with validated software
• Compact benchtop architecture: 110 mm diameter stainless-steel weighing pan; footprint under 300 × 250 mm; no external ventilation or cooling infrastructure required

Sample Compatibility & Compliance

The CSY-L5B is validated for use with virgin and recycled thermoplastic pellets—including polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), polyamide (PA6/PA66), polycarbonate (PC), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), and functional additives (e.g., plasticizers, flame retardants, nucleating agents). Its LOD methodology aligns with ISO 15512 Annex A for plastics and ASTM D6980 Section 7 for moisture quantification in polymer resins. Method equivalence studies demonstrate <±0.05% absolute deviation versus reference oven-drying at 105 °C for 2 hours (per GB/T 6284), satisfying internal QA validation requirements for GMP-regulated polymer compounding facilities.

Software & Data Management

While the CSY-L5B operates autonomously via embedded firmware, its RS232 port supports bidirectional ASCII protocol communication. When interfaced with compliant laboratory software (e.g., CSY DataLink v3.2 or third-party SCADA/LIMS platforms), it exports timestamped records containing sample ID, start/end time, final moisture %, drying curve metadata, and operator ID—structured to meet ALCOA+ data integrity principles. Audit trail functionality—including user login, method modification history, and result reprocessing logs—is achievable through externally hosted validation packages aligned with FDA 21 CFR Part 11 Subpart B requirements.

Applications

This analyzer serves critical quality control functions across the polymer supply chain: incoming raw material inspection at compounders; in-process moisture verification prior to extrusion or injection molding; release testing of hygroscopic engineering resins (e.g., PA, PET); and stability monitoring of dried pellets stored in dry-air hoppers. It is routinely deployed in ISO 9001-certified manufacturing sites where batch traceability, measurement uncertainty documentation (per ISO/IEC 17025), and method ruggedness (per ICH Q2(R2)) are mandatory.

FAQ

Is the CSY-L5B compliant with FDA 21 CFR Part 11?
Yes—when used with validated data capture software supporting electronic signatures, audit trails, and role-based access control.
Can it measure moisture in glass-filled or mineral-filled compounds?
Yes; the halogen ring lamp’s penetration depth accommodates filled systems, though method optimization (e.g., reduced max temperature) may be required for thermally unstable fillers.
What calibration standards are recommended?
Certified moisture reference standards (e.g., sodium tartrate dihydrate, 15.66% w/w) per USP <921> or ASTM E1868, verified annually against NIST-traceable weights.
Does it require routine maintenance beyond cleaning?
No scheduled maintenance is required; periodic verification of sensor linearity and lamp output intensity (using calibrated IR radiometer) is advised every 6 months.
How does it handle volatile additives that may co-evaporate with water?
The instrument reports total volatile loss; for selective water quantification in formulations containing low-boiling solvents, coupling with Karl Fischer titration (ASTM D6304) is recommended for orthogonal verification.