Rubber/plastics window weatherstrip for automobile
1Key Takeaways
This standard specifies the terms and definitions, product classification, basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality of passenger car window rubber and plastic seal strips (hereinafter referred to as window seal strips) promise. This…
2Expert Interpretation
In-depth analysis of the technical requirements for passenger car window rubber and plastic sealing strips in the T/ZZB 1423-2019 standard, covering EPDM and TPE/TPV material performance indicators, finished product testing methods and production process specifications, providing professional guidance on the selection and quality control of automotive sealing strips.
Interpretation of the core content of the standard
This standard specifies the technical requirements for passenger car window sealing strips made of ethylene propylene diene monomer (EPDM) and thermoplastic elastomer (TPE/TPV), including three types of products: glass run channel sealing strips, window sill outer sealing strips and window sill inner sealing strips.
Material Performance Comparison
| Performance Index | EPDM Dense Glue | TPE/TPV |
|---|---|---|
| Hardness Range (Shore A) | 50-90 | Full Range |
| Tensile Strength | ≥7MPa (Most) | ≥5MPa |
| Temperature Resistance | -40℃~70℃ | -40℃~100℃ |
| Compression Set | ≤55%（70℃） | ≤60%（70℃） |
Key Technical Requirements
Appearance Defect Grading Control
Divided into three areas A/B/C according to the degree of visibility:
- Area A (directly visible surface): defect diameter ≤0.8mm, ≤1 large defect + 2 small defects within 200mm
- Area B (indirectly visible surface): defect diameter ≤0.8mm, ≤2 large defects within 200mm
- Area C (invisible surface): only defects with diameter ≤0.8mm are allowed
Prohibited Substance Control
Strictly implement GB/T 30512-2014 requirements:
- Lead, Mercury, Hexavalent Chromium, PBB, PBDE ≤0.1%
- Cadmium ≤0.01%
Key points of the test method
Key test methods
- Abrasion test: Evaluate flocking shedding after dry/wet grinding
- Xenon lamp aging: Evaluate surface powdering level according to GB/T 32088-2015 (≥Level 4)
- Compression load: Glass contact surface 7.5±2.5N/100mm, body contact surface 4±2N/100mm
Implementation suggestions
Production process control
- Adopt an automated batching system and close dust removal during the mixing process
- Online monitoring of cross-sectional dimensions is required during the extrusion vulcanization process
- Use an integral injection mold for the corner joining process
Quality assurance measures
- Establish a raw material batch traceability system
- Retain type test samples for each batch of products
- Regularly calibrate key equipment such as ozone aging test chambers