Beijing North Guang HMYS-200 Sponge & Foam Compression Set Tester
| Brand | All Precision Instrument |
|---|---|
| Origin | Beijing, China |
| Manufacturer | Yes |
| Model | HMYS-200 |
| Temperature Range | RT–200 °C |
| Chamber Volume (W×D×H) | 350×300×300 mm |
| External Dimensions | 600×420×450 mm |
| Temperature Uniformity | ±1% of full scale |
| Timer Range | 1–9999 min |
| Compression Ratios | 50%, 75%, 90% |
| Test Duration | 22 h |
| Specimen Size | 50×50×25 mm (5 pcs) |
| Glass Plate Thickness | 1.0–1.5 mm |
| Rated Voltage | 220 V AC |
Overview
The Beijing North Guang HMYS-200 Sponge & Foam Compression Set Tester is a dedicated physical property testing instrument engineered for the quantitative evaluation of permanent deformation in flexible polymeric foams under controlled thermal and mechanical stress. It operates on the principle of compression set measurement—defined as the residual thickness loss after a foam specimen is subjected to a defined compressive strain at elevated temperature for a specified duration, followed by recovery under standard ambient conditions. This test method directly reflects the material’s viscoelastic resilience, network stability, and crosslink integrity—critical parameters for quality assurance in automotive seating, mattress manufacturing, packaging cushioning, and medical foam applications.
Key Features
- Microprocessor-controlled temperature chamber with PID regulation, ensuring stable thermal environments from ambient to 200 °C with ±1% full-scale accuracy;
- Integrated digital timer with adjustable range (1–9999 minutes), supporting standardized 22-hour dwell cycles per ISO 1856 Method A and ASTM D3574;
- Uniform hot-air circulation system featuring high-temperature-rated centrifugal blower and optimized duct geometry for spatial temperature homogeneity within the working chamber;
- Dedicated compression fixtures designed to apply precise, repeatable strain levels—50%, 75%, or 90% of original specimen thickness—using calibrated stainless-steel platens;
- Modular sample holder configuration accommodating five 50 mm × 50 mm × 25 mm specimens simultaneously; optional thin-specimen support using precision-ground glass plates (1.0–1.5 mm thick, 50–55 mm square);
- Robust industrial enclosure with insulated double-wall construction, front-mounted observation window, and safety interlock on chamber door.
Sample Compatibility & Compliance
The HMYS-200 is validated for use with open-cell and closed-cell flexible polyurethane, polyester, and latex foams. It fully complies with international standards governing compression set determination, including GB/T 6669–2001, ISO 1856:2000 (Method A), ASTM D3574–22 (Sections D, E, and J), and JIS K6400–7:2019. The instrument supports GLP-aligned operation through traceable calibration records, documented maintenance logs, and user-accessible parameter verification protocols. While not inherently 21 CFR Part 11 compliant, its operational parameters—including temperature setpoint, dwell time, and compression ratio—are manually logged and exportable for audit-ready reporting in regulated environments.
Software & Data Management
The HMYS-200 utilizes a standalone microcontroller-based interface with LED digital display for real-time monitoring of chamber temperature and elapsed time. No proprietary software is required for basic operation; however, users may integrate external digital calipers or micrometers (e.g., Mitutoyo IP67 series) with laboratory data acquisition systems for automated post-test thickness measurement and calculation of compression set (%) via the formula: C = [(t₀ − t₁) / t₀] × 100, where t₀ is initial thickness and t₁ is recovered thickness after 30-minute equilibration at 23 °C ± 2 °C and 50% RH. Calibration certificates for temperature sensors and mechanical fixtures are provided with each unit, and annual recalibration services are available through authorized service centers.
Applications
- Quality control of flexible foam formulations during R&D and production release;
- Comparative assessment of aging resistance in flame-retardant and bio-based foams;
- Validation of curing efficiency in thermoset foam systems;
- Supplier qualification testing per OEM specifications (e.g., Ford WSS-M99P1111-A, GMW15634);
- Supporting failure analysis in foam-related product recalls related to sagging, bottoming-out, or loss of load-bearing capacity;
- Academic research on polymer network relaxation kinetics under thermal-mechanical coupling.
FAQ
What standards does the HMYS-200 explicitly support?
It is configured and verified for GB/T 6669–2001, ISO 1856:2000 Method A, ASTM D3574–22 (Sections D, E, J), and JIS K6400–7.
Can the instrument perform tests at temperatures below ambient?
No—the HMYS-200 is a heating-only chamber with a minimum operating temperature at ambient; it lacks active cooling capability.
Is the compression fixture included with the base unit?
Yes—standard fixtures for 50% compression at 50×50×25 mm dimensions are supplied; optional fixtures for 75% and 90% strain, as well as glass support plates, are available upon request.
What is the recommended calibration frequency?
Annual calibration of temperature sensor and mechanical compression depth is advised; users should verify chamber uniformity and timer accuracy before each test campaign.
Does the system meet FDA or EU regulatory requirements for medical device foam testing?
While the instrument itself is not certified as medical-grade equipment, its adherence to ISO 1856 and ASTM D3574 enables generation of data suitable for inclusion in biocompatibility dossiers (e.g., ISO 10993-12) when operated under documented SOPs and QA oversight.
