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Chiterion devoted to Customizing Eco Bag Solutions for Shopping, Packaging, Delivery, Storage and Travel Since 2007
The performance testing methods and standards for thermal insulation bags vary depending on the application scenario. The following are some common test methods and relevant standards:
1. Thermal Insulation Performance Testing
Test Methods
Temperature Monitoring Method: Place a temperature sensor or temperature recorder inside the thermal insulation bag to simulate actual usage scenarios (e.g., refrigerated or frozen items), and record internal temperature changes at different time points. Comparing the initial temperature with subsequent temperatures evaluates the thermal insulation performance of the bag.
Thermal Resistance Testing Method: Referencing standards for thermal insulation performance of textiles (such as GB/T 11048), measure the thermal resistance of the thermal insulation bag material to assess its insulation capacity indirectly. The higher the thermal resistance, the better the thermal insulation performance.
Related Standards
1) Common Basic Standards
GB/T 27728-2011 "Food Cold Chain Logistics Traceability Management Requirements": indirectly stipulates the temperature maintenance requirements for insulated bags used for food distribution.
GB 4806 series: Safety standards for food contact materials, which clearly define the migration amount, odor, and other indicators of the inner layer materials of insulation bags.
QB/T 4113-2019 "Thermal Insulation Containers": Applicable to thermos bottles, thermal boxes, etc. Some indicators can be used as a reference for hard thermal insulation bags.
2) Industry-specific standards
Express delivery and logistics industry: Refer to "Express Delivery Services Part 5: Service Links" (GB/T 27917.5), which has clear requirements on the temperature maintenance time of insulation bags used for cold chain express delivery (such as the insulation time of refrigerated food ≥ 4 hours).
Medical industry: Complies with the YY/T 0698 (medical cold chain transport packaging) series of standards, requiring low-temperature insulation bags to maintain a temperature of -20°C for ≥24 hours.
3) International Standards
ISO 80601-2-88:2017 "Medical electrical equipment - Part 2-88: Particular requirements for thermal insulation containers for transport": Develops standards for the temperature and safety performance of medical cold chain thermal insulation containers.
ASTM D3421-20 Test Method for Temperature Distribution in Transport Containers and Systems: This standard specifies the test procedure for temperature distribution in insulated containers and applies to temperature uniformity testing of insulation bags.
EN 12546-3:2000 "Refrigerated transport packaging - Part 3: Requirements and test methods for thermal insulation bags": EU special standard for the temperature retention and physical properties of thermal insulation bags.
Currently, in commonly used test method standards, thermal resistance and thermal insulation rate are widely used to characterize thermal insulation performance. Thermal product standards typically use thermal insulation rate to evaluate the thermal performance of an insulated bag, while thermal resistance generally only appears in method standards.
"GB/T 11048-2008 Textiles for Physiological Comfort - Determination of Thermal and Moisture Resistance under Steady-State Conditions," implemented in 2008, replaced the older standard "GB/T 11048-1989 Textiles - Test Method for Thermal Insulation." Compared to GB/T 11048-1989, GB/T 11048-2008 added thermal resistance, Crowe value, and thermal conductivity, while removing the thermal insulation rate indicator from the older standard. Therefore, in the new standard, we can only obtain test results for thermal resistance, not the thermal insulation rate indicator.
The new standard uses two instruments: Type A, for the evaporative hot plate method, and Type B, for the static flat plate method. Type B is the same instrument used in Method A in GB/T 11048-1989. This means that Method B in GB/T 11048-2008 is essentially the same as Method A for Thermal Insulation Rate in GB/T 11048-1989, except that the result is a thermal resistance indicator, not a thermal insulation rate indicator.
GB/T 11048: Textiles - Determination of Thermal and Moisture Resistance under Steady-State Conditions for Physiological Comfort, suitable for evaluating the thermal resistance performance of thermal insulation bag materials.
ASTM D3103: Standard Test Method for Thermal Insulation Performance of Transport Packages, commonly used to evaluate the thermal insulation performance of thermal insulation bags during logistics and transportation.
2. Sealing Performance Test
Test Method
Watertightness Test: Fill the bag with water or a simulated liquid, seal it, and invert or tilt it to observe for leaks.
Pressure Test: Apply a certain pressure (e.g., inflate the bag) to the bag to check whether the seal can withstand the pressure without leaking.
Related Standards
GB/T 4208: Degrees of Protection (IP Code), used to evaluate the dust and water resistance of insulation bags.
3. Durability Test
Test Method
Drop Test: Fill the bag with a certain weight and drop it from different heights to check for damage, displacement, or damage to the contents.
Tensile Test: Perform a tensile test on the bag's handles, zippers, and other parts to assess its ability to withstand external forces.
Related Standards
ISTA 7D/7E: Transport Packaging Temperature Test Standard, covering testing requirements for insulation bags during transportation, such as temperature stability and drop impact.
4. Other Tests
Dimensional Stability Test: This test measures the dimensional changes of the insulation bag under varying temperature and humidity conditions to ensure that deformation during use does not affect the insulation effect or ease of use.
Hygiene and Safety Test: If the insulation bag is used in the food or medical sector, it must comply with relevant hygiene standards (such as the GB 4806 series) to ensure that the material is non-toxic and harmless and will not contaminate the contents.
Note: Different types of insulation bags (such as food insulation bags and pharmaceutical cold chain insulation boxes) may require a comprehensive evaluation using a combination of testing methods and standards.
During actual testing, it is recommended to refer to the specific application scenario and relevant industry standards. If necessary, professional testing can be commissioned.
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