When testing the durability of shoes or materials such as PU (polyurethane), it's crucial to evaluate how they perform under high-temperature and high-humidity conditions over time. Hydrolysis aging testing simulates long-term usage by exposing materials to extreme environmental stress, providing a clear picture of how they will behave in real-world applications.
LIB's Temperature and Humidity Test Chamber ensures precise control of environmental conditions, making hydrolysis aging testing more reliable, repeatable, and efficient. With uniform temperature and humidity distribution, advanced PID controllers, and multi-directional airflow, it delivers results that are trusted by QA engineers and R&D specialists worldwide. This chamber adheres to relevant standards such as ISO 16750, IEC 60068-2-78, and ASTM D4495, supporting accurate evaluation of tensile strength, elongation, tear resistance, and color stability in PU and other polymer materials.
1. Working Principle of Temperature and Humidity Test Chamber for Hydrolysis Aging Testing
Hydrolysis aging testing relies on exposing materials to controlled high temperature and humidity conditions to accelerate degradation mechanisms. LIB's Temperature and Humidity Test Chamber combines precise heating, humidification, and airflow systems to simulate these conditions in a reproducible manner.
The chamber maintains temperatures from 20 °C to 70 °C and relative humidity of 95 % or higher, mimicking prolonged environmental exposure in a compact timeframe. Multi-directional centrifugal fans ensure uniform circulation, eliminating hot or humid spots, while PT100 Class A sensors provide ±0.001 °C temperature resolution and ±2.5 % RH humidity accuracy. This precision guarantees that the hydrolysis reaction is consistent across all samples, producing reliable performance data for materials such as shoes, coatings, and synthetic leathers.
By replicating years of environmental stress within days or weeks, this chamber allows engineers to observe early-stage deterioration, identify weaknesses, and compare different material formulations under standardized conditions.
Climate Chambers for Hydrolysis Aging Testing
》》》For more technical information and details about our Temperature Chamber, please feel free to email us at info@libtestchamber.com.
2. Procedure for Hydrolysis Aging Testing Using LIB Temperature and Humidity Test Chamber
Hydrolysis aging testing follows a systematic procedure, ensuring reproducibility and accurate assessment of material performance. LIB's chamber provides several advantages in each step, including uniform environmental control, fast ramping, and integrated monitoring.
Step 1: Sample Preparation
Prepare PU samples of specific dimensions, such as 3 mm or 10 mm thickness. The chamber's adjustable racks allow safe placement of multiple samples without airflow obstruction, supporting batch testing while maintaining uniform exposure.
Step 2: Pre-Test Characterization
Record baseline performance by measuring tensile strength, elongation, tear resistance, and color. LIB's precise measurement protocol ensures that initial values are accurately captured, forming a reliable reference for post-test analysis.
Step 3: Controlled Hydrolysis Aging
Place samples inside the chamber and set the temperature to 70 °C and relative humidity to 95 %. Set the exposure duration to 168 hours (or as required by ISO 16750/IEC 60068-2-78 standards). The chamber's rapid heating rate of 3 °C/min and stable humidity control allow samples to quickly reach the target environment, reducing setup time and enhancing test efficiency.
|
|
|
|
| Robust Workroom | Cable Hole | Temperature and Humidity Sensor |
Step 4: Recovery to Ambient Conditions
After testing, remove samples and allow them to equilibrate at room temperature for at least 8 hours. LIB's chamber ensures minimal residual humidity, preventing unintended post-test hydrolysis.
Step 5: Post-Test Measurement
Re-evaluate tensile strength, elongation, tear resistance, and color changes. LIB's multi-point monitoring and uniform airflow guarantee consistent treatment, so changes in mechanical properties are solely due to hydrolysis.
Step 6: Comparative Analysis
Calculate performance changes and assess color degradation using standard color cards. LIB's data logging and reporting features provide ISO-compliant records, enabling clear documentation of material performance and facilitating product certification.
|
|
|
|
|
|---|---|---|---|
 |
 |
 |
|
| Name | Small Climatic Test Chamber | Standing Climatic Test Chamber | Walk-In Climatic Test |
| Capacity |
TH-50: 800x1050x950 mm TH-80: 900×1100×1000mm |
Capacity: 100L; 225L; 500L; 800L; 1000L |
＞20m³ |
》》》To receive customized solutions and pricing for the Temperature Chamber, please contact us at info@libtestchamber.com.
3. Maintenance of LIB Temperature and Humidity Test Chamber
Proper maintenance ensures consistent hydrolysis aging test results and prolongs chamber lifespan. LIB provides clear guidelines for routine inspection and upkeep:
Heating System
- Inspect heating strips every six months; replace if damaged.
- Check circulation fan motors for noise and alignment; adjust if necessary.
- Verify temperature sensor connections; replace sensors showing faults.
- Test solid-state relays and contactors; clean dust and tighten screws.
Humidification System
- Clean condenser and compressor fans regularly.
- Check evaporator, water filter, and pump motor for dust or blockage.
- Inspect humidifier heating pipes; resistance should be 13 Ω–26 Ω.
- Drain and clean water tank and cup monthly; ensure float balls operate correctly.
- Replace wet wick if yellowed or moldy; maintain proper humidity readings.
Cooling System
- Monitor refrigerant pressure gauges: 5–15 bar idle, 15–25 bar during operation.
- Add refrigerant or repair leaks as needed.
- Clean evaporator regularly to maintain efficient cooling.
Electrical System
- Inspect controllers, relays, contactors, transformers, and solenoid valves for dust, loose connections, or damage.
- Tighten screws and ensure proper operation to prevent electrical failures.
Other Systems
- Check locks, sealing strips, rubber plugs, and buttons for wear or damage.
- Replace sealing components every two years or as needed to prevent leakage.
- Routine maintenance, including filter replacement, sensor verification, and water refills, takes minimal time but ensures long-term reliability and test repeatability.
4. FAQs on Temperature and Humidity Test Chamber
Q1: Is there audible and visual alarm functionality?
The chamber comes standard with audible alarms for critical faults. Visual alarm modules are available as optional add-ons, customizable to your lab requirements.
Q2: Can the controller be replaced with another brand?
Yes, LIB supports custom controller brands such as Siemens. Provide specifications, and we will match a suitable system to your chamber.
Q3: How long does it take for humidity to reach the setpoint?
The chamber's high-efficiency humidification system typically achieves target humidity within 30 minutes, ensuring rapid stabilization for testing.
Q4: Which compressor types are used and in what situations?
Tecumseh and Panasonic compressors: best for small chambers, offering stable and efficient operation.
Copeland (scroll) compressors: ideal for large water-cooled chambers, providing high-capacity cooling.
Q5: Can the power connection be supplied with a plug instead of bare wires?
For safety reasons, the standard design comes with bare wires. We recommend using a lab-provided plug to prevent wiring errors and ensure safe operation.
LIB's Temperature and Humidity Test Chamber makes hydrolysis aging testing on shoes and other materials precise, efficient, and fully standardized. By combining robust construction, accurate PID control, and uniform environmental exposure, LIB ensures reliable results for quality assurance and product development.
Any customization can be made. LIB offers a 3-year warranty and lifetime service. Any issues that cannot be resolved during the warranty period will be replaced free of charge. 24/7 English-speaking after-sales team. Fast shipping within 7-15 days.
Contact LIB Industry today for a live demo, application consultation, or to discuss customization options. Empower your team with the precision, speed, and reliability they deserve.
