Product Overview & Dual-Function Capability
Evaluating flexible cellular materials usually requires switching between separate machines to measure squish and stretch. We engineered the Foam Hardness and Tensile Tester to eliminate this exact bottleneck. This universal material testing machine (UTM) for foam combines both compression and tensile testing into a single, high-efficiency system.
Whether you need to measure how a cushion deforms under a passenger's weight or how much a sponge stretches before tearing, this dual-function rig handles it all on one platform.
The Engineering Challenge
Testing flexible polyurethane foam presents unique mechanical hurdles that standard testers cannot handle:
- Massive Stroke, Low Force: Foam stretches significantly but requires very little force to do so, demanding highly sensitive load cells paired with extended crosshead travel.
- Surface Irregularities: Soft materials slip easily out of standard mechanical grips, ruining elongation at break data.
- Pre-loading Sensitivity: Even minor weight from a fixture can trigger premature data logging, throwing off initial thickness readings.
The Derui Solution
We built our microcomputer-controlled foam tester specifically to conquer these mechanical challenges. By pairing a dual-column foam testing rig with specialized pneumatic grips for foam tensile testing, the system secures soft samples without crushing or slippage.
Our specialized software applies precise, automatic pre-loads to establish true initial thickness, ensuring every test starts from a perfectly calibrated baseline.
Key Performance Benefits
FeatureAdvantageImpact on TestingDual-Column ArchitectureEliminates frame deflection during high-stroke cyclesPure axial alignment and repeatable dataDual-Function TestingRuns compression (IFD/ILD) and tensile tests on one benchSaves floor space and cuts equipment costs in halfHigh-Resolution TrackingCaptures tiny load variations at large displacement stepsAccurate tracking of soft foam behaviorQuick-Change FixturesSwap between circular compression platens and pneumatic gripsSeamless transitions between ASTM and ISO test modes
Compliant Testing Standards Index
To deliver reliable, market-ready products, strict compliance with global testing protocols is non-negotiable. Our Foam Hardness and Tensile Tester is engineered to perform a wide array of standardized evaluations seamlessly.
We design our Derui foam testing solutions to align with key international standards, ensuring your laboratory results are globally recognized and highly accurate.
ASTM D3574 (Test B) IFD Test
This test determines the Indentation Force Deflection (IFD) of flexible cellular plastics. The system compresses a foam sample to a predetermined percentage of its original thickness (typically 25% and 65%) to measure its load-bearing capacity. Equipment Setup: Configured as a high-precision Foam Indentation Force Deflection (IFD) Tester. Key Metric: Load-bearing capacity and support factor of polyurethane foams.
ASTM D3574 (Test E) Tensile Strength
This standard measures the ultimate pulling force a foam specimen can withstand before tearing apart. Equipment Setup: Leverages our specialized Polyurethane Foam Tensile Testing Equipment framework. Key Metric: Tensile strength (psi or kPa) and elongation percentage at break.
ASTM D3574 (Test F) Tear Resistance
Evaluates the foam’s ability to resist further tearing once a cut has been initiated. Equipment Setup: Functions as an automated Sponge Tear Resistance Tester. Key Metric: Tear strength in pounds per inch (lb/in) or Newtons per meter (N/m).
ISO 2439 & ISO 3386 Compression Hardness
These standards define international methods for determining the indentation hardness and compression force deflection (CFD) of flexible cellular materials. ISO 2439: Focuses on indentation hardness index values using specified indentor plates. ISO 3386: Measures the overall compression stress-strain characteristics of low-density foam blocks.
ISO 1798 Tensile Strength
This standard specifies the exact method for determining the tensile strength and elongation at break of flexible cellular polymeric materials. Equipment Setup: Serves as a dedicated ISO 1798 Tensile Strength Tester. Key Metric: Precise grip travel and force data capture under a constant speed of 500 mm/min.
Core Hardware & Software of Our Foam Hardness and Tensile Tester
We engineered our Foam Hardness and Tensile Tester with premium, industrial-grade hardware and smart control software. This integration delivers the rigid stability and precise closed-loop control required for repeatable, high-accuracy cellular material testing.
FeatureEngineering ImplementationOperational AdvantageDual-Column FrameHeavy-duty dual-column structure with high-precision ball screws and dual guide shafts.Eliminates frame deflection during high-load compression and tensile cycles, ensuring pure axial alignment.Load CellHigh-precision S-type load cell with bidirectional calibration.Delivers extreme force resolution down to 1/300,000, capturing the subtle initial deflection points of soft foam.Closed-Loop ControlAdvanced microcomputer-controlled system driving a high-response AC servo motor.Enables real-time feedback loops for constant rate of extension (CRE) and precise stress/strain holding.Safety SystemsMechanical limit switches, overload protection, and emergency stop button.Prevents load cell damage from accidental over-travel and guarantees operator safety during high-elongation breaks.
Heavy-Duty Dual-Column Frame
Our dual-column foam testing rig provides the structural backbone necessary for demanding ASTM and ISO protocols. The rigid design prevents lateral movement, allowing the system to double as a highly stable universal material testing machine (UTM) for foam. It easily accommodates large foam blocks and high-travel elastomeric tensile specimens.
High-Precision Load Cell
We equip each machine with premium, fatigue-rated load cells that perform flawlessly under both tension and compression. This ensures that whether you are running a light indentation test or pulling a tough polyurethane sample to its breaking point, your force data remains accurate, repeatable, and free of signal noise.
Advanced Closed-Loop Software System
At the heart of this microcomputer-controlled foam tester is our intuitive testing software. It manages the entire testing sequence automatically: Automated Routines: Built-in templates for IFD, tensile, tear, and compression tests. Real-Time Graphing: Live tracking of load vs. displacement, stress vs. strain, and multi-cycle hysteresis loops. Data Export: Clean XML, CSV, and PDF report generation compliant with international laboratory standards.
Robust Operational Safety
To protect both your operators and your investment, the foam tensile and compression test bench features multi-layered safety guards. Intellectual overload sensors immediately freeze the crosshead movement if force limits are breached, while dual physical travel limiters prevent tool-to-fixture collisions.
Technical Specifications of the Foam Hardness and Tensile Tester
When evaluating a Foam Hardness and Tensile Tester, precision engineering and robust hardware limits determine the accuracy of your material characterization. Our dual-column testing systems are engineered to deliver uncompromising accuracy across all physical test protocols.
Specification ParameterStandard Capability & RangeForce Capacity OptionsDual-range configurations: 5 kN (ideal for standard flexible polyurethane foams) and 10 kN / 20 kN (optimized for high-density elastomers and rigid packaging materials)Force Resolution1/500,000 of the load cell capacity (captures micro-changes in cell structure collapse during compression)Displacement Resolution0.001 mm via high-resolution photoelectric encodersTesting Speed Range0.01 to 500 mm/min (stepless speed regulation conforming to ASTM and ISO test speed demands)Maximum Effective Stroke1000 mm (excluding fixtures, allowing maximum elongation space for highly elastic foam tensile testing)
Key Performance Thresholds
- Load Measurement Accuracy: Within ±0.5% of the indicated value down to 1% of the load cell capacity.
- Speed Accuracy: Within ±0.5% of the set speed, ensuring steady compression rates during Indentation Force Deflection (IFD) tests.
- Safety Limits: Integrated electronic limit switches, over-travel protection, and automatic load cell overload detection to safeguard delicate sensors.
Custom Fixtures & Application Scope for Our Foam Hardness and Tensile Tester
To get accurate results, your testing rig has to match your material. We design and build custom fixtures for our Foam Hardness and Tensile Tester to handle everything from ultra-soft memory foam to tough industrial gaskets. By swapping out platens, pneumatic grips, and pull-test clamps, you can transition from compression tests to tensile pulls in minutes.
Material TypeCore Testing ApplicationRecommended Fixture / AccessoryFlexible Polyurethane FoamComfort & support assessment (IFD/ILD)Circular flat indentor & perforated lower platenBedding & CushionsDurability, fatigue, and firmness profileLarge-scale compression platens (up to 500 mm)Technical PackagingShock absorption and impact crush resistanceStandard compression platesElastomers & GasketsTensile strength, tear resistance, and elongationPneumatic scissor grips or wedge action grips
Flexible Polyurethane Foam Applications
Automotive seating, office chairs, and acoustic panels require precise comfort profiling. We configure our tester with specialized perforated support plates to prevent air-trapping during rapid compression cycles, ensuring your deflection readings represent true material performance.
Bedding & Consumer Products
For mattresses, pillows, and furniture cushions, durability is everything. Our system accommodates oversized samples, applying precise cyclic loads to measure height loss and hardness loss over simulated years of wear.
Industrial & Technical Packaging
Protective packaging must absorb impact to keep fragile goods safe. We help you test compression force deflection on expanded plastics like EPS and EPE, ensuring your packaging materials meet strict drop-test standards without bottoming out.
Elastomers & Gaskets
Denser, high-rebound materials require much higher force and superior grip strength. We outfit the testing rig with high-capacity wedge grips to prevent sample slippage during high-elongation tensile and tear resistance runs.
Why Choose Our Foam Hardness and Tensile Tester?
We know that buying a foam hardness and tensile tester is a serious investment in your product's reputation. At Derui, we do not just ship machines—we partner with you to ensure your testing is flawless, compliant, and completely hassle-free.
Calibration, Global Support, and Custom Engineering
- Certified Precision: Every machine we build is delivered with rigorous calibration and metrology certification, ensuring you get reliable, audit-ready data from day one.
- On-Demand Global Support: We back our equipment with proactive technical assistance, remote diagnostics, and fast-response servicing to keep your lab running smoothly.
- Bespoke Engineering: If our standard setup does not fit your exact workflow, our engineers will design custom pneumatic grips, specialized software modules, or tailored test frames for your specific needs.
Why Partner With Derui?Our StandardYour AdvantageCalibrationMetrology-certified to ISO & ASTM specsComplete confidence in test accuracy and hassle-free auditsGlobal Support24/7 technical assistance and remote diagnosticsMinimal testing downtime and rapid problem resolutionBespoke EngineeringCustom fixture design and tailored software tweaksA system built exactly for your unique material specifications
FAQs about Foam Hardness and Tensile Testing
When you are choosing or operating a Foam Hardness and Tensile Tester, getting clear answers to common technical questions helps you maintain accuracy and comply with global standards. Here is what you need to know.
What is the difference between IFD and ILD testing?
While both terms describe how a flexible cellular material resists compression, they differ slightly in their naming conventions and historical standards.
FeatureIndentation Force Deflection (IFD)Indentation Load Deflection (ILD)Standard TerminologyDefined under modern ASTM D3574 standards.Older terminology, still widely used in the bedding industry.Measurement UnitExpressed in Newtons (N) or Pounds-force (lbf).Traditionally expressed in Pounds (lbs).Testing GoalMeasures the force required to compress a foam sample by a specific percentage (typically 25% or 65%) of its original thickness.Identical physical test method, but uses older label phrasing.
How often should a foam tensile tester be calibrated?
To keep your Universal Material Testing Machine (UTM) for Foam compliant with ISO and ASTM standards, follow this strict calibration schedule:
- Annual Calibration: Perform a full system calibration every 12 months through an accredited metrology service.
- Load Cell Verification: Calibrate the high-precision load cell annually, or immediately if the machine experiences an accidental overload.
- Daily Checks: Operators should run a quick zero-point verification before starting any new batch of ASTM D3574 foam testing.
Can this machine test closed-cell foam and memory foam?
Yes. Our versatile Foam Hardness and Tensile Tester handles a wide range of cellular materials due to its advanced closed-loop control software:
- Memory Foam (Viscoelastic): The system features adjustable dwell times to accurately capture the slow recovery rate and unique compression curves of memory foam.
- Closed-Cell Foam: The rugged dual-column frame easily handles the higher force thresholds required to compress or tear high-density closed-cell packaging foams and gaskets.
