Y-Warm is designed for long-term use as a flexible thermal insulation material. Its thermal insulation mechanism is closely related to the integrity of its engineered closed-cell porous structure with nanometer-scale cell walls.
Unlike conventional down and synthetic fiberfill, which rely primarily on macroscopic loft, Y-Warm’s insulating structure is built directly into the material itself.
For this reason, maintaining the integrity of its porous structure is important to preserving its intended thermal insulation function over time.
To evaluate Y-Warm’s durability and structural stability under demanding environmental conditions, the material has undergone a series of thermal aging, high-temperature/high-humidity aging, low-temperature flexing, and low-temperature exposure tests.
1. Thermal Aging Test
Test conditions: 120°C for 168 hours
Y-Warm was stored in a test chamber at 120°C for 168 hours.
After the test, no evidence of structural damage was observed.
This test evaluates the structural stability of the material after prolonged exposure to elevated temperature.
2. High-Temperature and High-Humidity Aging Test
Test conditions: 70°C / 95% relative humidity for 12 weeks
Y-Warm was stored in a controlled test chamber at 70°C and 95% relative humidity for 12 weeks.
After the test, no evidence of structural damage was observed.
This test evaluates the material’s structural stability under prolonged exposure to elevated temperature and high humidity.
3. Low-Temperature Flexing Test
Test conditions: −40°C / 30,000 flexing cycles
Y-Warm was subjected to 30,000 repeated flexing cycles at −40°C.
After the test, no evidence of cracking or structural damage was observed.
This test evaluates the material’s ability to withstand repeated mechanical deformation under low-temperature conditions and is particularly relevant to applications such as apparel, footwear, gloves, and outdoor equipment.
4. Low-Temperature Exposure Test
Test conditions: −60°C for 7 days
Y-Warm was stored in a test chamber at −60°C for seven days.
After the test, no evidence of structural damage was observed.
This test provides additional information on the structural stability of Y-Warm after prolonged exposure to extremely low temperatures.
5. Long-Term Sample Observation
The first Y-Warm laboratory samples were produced in 2017.
Since then, retained R&D prototypes and subsequent production samples have been periodically observed for signs of structural degradation.
No visible signs of structural degradation have been observed in the retained samples to date.
This long-term sample observation provides supplementary information alongside the accelerated aging and environmental durability tests.
It should be distinguished from standardized long-term aging testing conducted continuously under controlled conditions.
What Determines the Functional Lifespan of Y-Warm?
The functional lifespan of Y-Warm is influenced by the conditions under which the material is processed, stored, incorporated into a product, and used.
Relevant factors include:
operating temperature;
repeated bending and mechanical stress;
excessive heat and pressure;
washing and care conditions;
chemical exposure;
lamination and bonding processes;
physical damage; and
construction and conditions of use of the finished product.
For finished products such as garments, footwear, gloves, and outdoor equipment, overall service life also depends on other components, including the outer fabric, lining, membrane, adhesives, seams, and product construction.
Durability Testing at a Glance
Test | Test Conditions | Observation |
Thermal aging | 120°C × 168 h | No evidence of structural damage was observed |
High-temperature/high-humidity aging | 70°C / 95% RH × 12 weeks | No evidence of structural damage was observed |
Low-temperature flexing | −40°C × 30,000 cycles | No evidence of cracking or structural damage was observed |
Low-temperature exposure | −60°C × 7 days | No evidence of structural damage was observed |
Long-term sample observation | Retained samples since 2017 | No visible signs of structural degradation have been observed to date |
Structural Stability and Thermal Performance
The tests described above provide evidence regarding the structural stability and durability of Y-Warm under the specified test conditions.
Structural observations and thermal performance measurements represent different types of evidence. Where thermal conductivity or thermal resistance has not been measured before and after a specific aging test, structural observations should be reported as evidence of structural stability, rather than as a direct measurement of changes in thermal performance.
This distinction helps ensure that test results are interpreted according to what was actually evaluated.
Y-Warm’s functional lifespan is therefore better understood in relation to material integrity, defined durability testing, processing conditions, environmental exposure, and actual conditions of use, rather than as a single fixed lifespan.
Third-Party Verification Report:
Y-Warm,Beijing Matrix Technologies Co.,Ltd.