Home / Standards / GB/T 21332-2025 GB/T 21332-2025 Upcoming Rigid cellular plastics—Determination of water vapour transmission properties 硬质泡沫塑料 水蒸气透过性能的测定 Standard Type GBT ICS 83.100 CCS G32 Status 即将实施 Issue Date 2025-12-31 Implementation 2026-07-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A