GB/T 40322-2021 in English
VALIDThermoplastic elastomer—Specifications of door sealmaterials for household and similar refrigerating appliances
- Issued on:2021-08-20
- Implemented on:2022-03-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$97.00
| Standard No: | GB/T 40322-2021 |
| Document status: | VALID |
| Title in English: | Thermoplastic elastomer—Specifications of door sealmaterials for household and similar refrigerating appliances |
| Title in Chinese: | 热塑性弹性体 家用和类似用途制冷器具用门密封材料规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2021-08-20 |
| Implemented on: | 2022-03-01 |
| ICS Classification: | 83.060-Rubber |
| Chinese Classification: | G35-Synthetic rubber |
| Professional Classification: | GB-National Standard |
| Related Keywords: | household refrigeration appliances
similar refrigerating appliances introduction standard framework door sealmaterials door seal materials thermoplastic elastomer specifications |
| Related Topics: | Elastomer Standard
thermoplastic elastomer heating cooler material Elastomer use thermoplastic elastomer GBT40322 GB/T 40322-2021 Household and similar refrigerating appliances Household and similar uses elastomer Elastic thermal refrigeration super elastic |
《GB/T 40322-2021热塑性弹性体 家用和类似用途制冷器具用门密封材料规范》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
Introduction
Standard Framework and Technology Evolution
As the first special specification for door seal materials for household refrigeration appliances, this standard marks a breakthrough in the standardization of elastomeric material applications in my country. Compared with the QB/T5370-2019 industry standard, new practical indicators such as antibacterial and mildew resistance (antibacterial rate ≥ 90%) and oil resistance (cream/soybean oil test) are added.
Comparison of core performance indicators
| Test items | Indicator requirements | Test methods | Technical breakthrough points |
|---|---|---|---|
| Tensile strength | ≥8MPa | GB/T528 | 15% higher than the industry standard |
| Low-temperature brittleness | ≤-40℃ | GB/T15256 | Adapt to cold climate requirements |
| Compression set | ≤30% | GB/T7759.1 | Ensure long-term sealing effect |
Analysis of key test methods
Case of detergent resistance test
Using the QB/T5370-2019 method, after the sample is immersed in a 5% detergent solution for 24 hours, it is required that the surface has no softening and swelling phenomenon. A Ningbo company has increased the chemical resistance of the material by 40% by adding nano-silicon dioxide filler.
Key points for the implementation of antibacterial performance
According to GB21551.2, the antibacterial rate against Escherichia coli and Staphylococcus aureus must reach more than 90%. It is recommended to pay attention to the compatibility treatment with the TPE substrate when adding silver ion antibacterial agent (dosage 0.8-1.2%).
Production process control suggestions
- Mixing stage: Temperature is controlled at 160-180℃ to avoid decomposition of heat-sensitive additives
- Granulation moisture content: Need to be <0.3% (GB/T2941 regulation requirement)
- Batch management: It is recommended to take samples every 2 hours to test the melt index (MI)
Special requirements for packaging, storage and transportation
The standard clearly stipulates that moisture-proof composite packaging (polyethylene lining + woven cloth outer layer) must be used. In the case of Ningbo Port export, vacuum packaging can extend the storage period to 18 months. Special attention should be paid to isolation from acidic and alkaline substances during transportation.
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 45599-2025 in English
Liquid silicone rubber—Self-lubricating type for connectors
2025-04-25 -
GB/T 24797.1-2009 in English
Film for wrapping rubber bales—Part 1:Butadiene rubber(BR)and styrene-butadiene rubber(SBR)
2009-12-15 -
GB/T 21462-2008 in English
Evaluation procedure of Chloroprene Rubber(CR)
2008-02-26 -
GB/T 30308-2013 in English
Fluoroelastomers - General Specification and Procedure of Evaluation
2013-12-31
