Advanced Rotorless Rheometer for Elastomer and Rubber Compound Analysis
The RPA select is a versatile rotorless rubber rheometer designed to characterise the viscoelastic properties, curing behaviour, and processing characteristics of elastomers and rubber compounds.
Combining precision measurement technology with a flexible upgrade platform, the RPA select provides manufacturers, researchers, and quality control laboratories with reliable material data to optimise formulations, improve processing efficiency, and ensure consistent product performance.
Designed for future expansion, the RPA select delivers advanced rubber analysis capabilities today with the option to upgrade to the higher-performance RPA ultra platform as testing requirements grow.
Standards
Standard Compliance:
- ASTM D5289
- ISO 6502
- ISO 13145
- DIN 53529
Optional standards:
- ASTM D6048
- ASTM D6204
- ASTM D6601
- ASTM D7050
- ASTM D7605
- ASTM D8059
- ASTM D8491
Measuring Methods
Standard measurement modes:
- Isothermal testing
- Non-isothermal testing
Optional advanced measurement modes:
- Frequency Sweep
- Strain Sweep
- LAOS (Large Amplitude Oscillatory Shear)
- Stress Relaxation
- Steady Shear / Ramp
- Matrix Sweep
Applications
The RPA select is suitable for analysing a wide range of rubber and polymer materials, including:
- Raw polymers
- Polymer blends
- Uncured rubber compounds
- In-situ compounds
- Thermoplastics
- Liquid Silicone Rubber (LSR)
- Thermoplastic Elastomers (TPE)
- Recovered Carbon Black (rCB) compounds
Typical applications include:
- Rubber formulation development
- Material research
- Quality control
- Process optimisation
- Compound comparison
- Production troubleshooting
Product Overview
The RPA select is a high-performance rubber process analyser developed for laboratories and manufacturers requiring accurate and repeatable characterisation of rubber compound behaviour.
Using rotorless rheometer technology, the RPA select measures key material properties including:
- Viscoelastic behaviour
- Cure characteristics
- Elastic and viscous response
- Processing performance
- Compound consistency
These measurements provide valuable insight into how rubber materials will behave during mixing, processing, curing, and final application.
The instrument's advanced temperature control system ensures stable and accurate testing conditions, while the intuitive BareissOne software platform simplifies measurement setup, data analysis, and reporting.
With a scalable design, the RPA select provides a future-ready solution for laboratories that require reliable rubber testing today and expanded capabilities tomorrow.
Key Features
Comprehensive Rubber Compound Analysis
The RPA select delivers detailed characterisation of rubber compounds, helping users understand material behaviour throughout the processing cycle.
It provides essential information for:
- Optimising formulations
- Improving processing parameters
- Evaluating raw materials
- Monitoring production consistency
- Developing new rubber products
Precise Temperature Control
Accurate temperature regulation ensures reliable testing conditions and repeatable measurement results across a wide range of rubber compounds and applications.
Advanced Rheological Testing Capability
The RPA select provides accurate measurement of viscoelastic properties through advanced rheological analysis techniques.
Optional measurement modes expand testing capability to investigate:
- Frequency-dependent behaviour
- Strain response
- Relaxation characteristics
- Shear behaviour
- Complex material interactions
BareissOne Software Platform
The RPA select integrates with BareissOne, an intelligent software platform designed to simplify rubber testing workflows.
BareissOne provides:
- Intuitive test configuration
- Automated data collection
- Advanced result analysis
- Measurement comparison
- Reporting functions
- Centralised data management
The user-friendly interface allows researchers and technicians to focus on material analysis rather than instrument operation.
Upgradeable Platform
The RPA select is designed with future flexibility in mind.
As testing requirements develop, the system can be upgraded to the advanced RPA ultra, providing additional capabilities including enhanced simulation of real-world processing conditions and expanded rheological analysis options.
This upgrade pathway allows laboratories to increase testing capabilities without replacing their existing investment.
Optional Advanced Features
High-Speed Sampling for Fourier Transform Rheology
The advanced RPA platform uses high-speed data acquisition to capture detailed material behaviour during each measurement cycle.
This enables improved Fourier Transform Rheology (FTR) analysis by converting time-domain measurements into frequency-domain information, providing deeper understanding of complex viscoelastic properties.
Wall-Slip Analysis for Production-Relevant Testing
By replacing the standard upper test die with a polished die set that replicates extruder wall surface conditions, the RPA can simulate production-related processing behaviour.
This wall-slip measurement capability provides more realistic insight into material flow and processing performance.
Fully Rotational Lower Die for Process Simulation (RPA Ultra Upgrade)
The optional fully rotational lower die enables extrusion-relevant shear rate testing, allowing laboratory measurements to more closely replicate actual production conditions.
This advanced capability helps bridge the gap between laboratory analysis and real-world manufacturing performance.
Benefits
- Rotorless rubber rheometer for advanced compound analysis
- Measures viscoelastic properties and curing behaviour
- Suitable for elastomers, polymers, and advanced rubber compounds
- Accurate temperature control
- Supports standard and advanced rheological testing modes
- Helps optimise formulations and processing conditions
- User-friendly BareissOne software integration
- Scalable upgrade path to RPA ultra
- Reliable and repeatable measurement results
- Ideal for research, development, and quality control
Typical Industries
- Rubber manufacturing
- Automotive
- Tyres and rubber products
- Polymer processing
- Chemical manufacturing
- Research laboratories
- Material development
- Quality assurance