GB/T 15592-2021 in English

Standard Evolution and Core Changes

GB/T15592-2021, as the authoritative standard in the field of polyvinyl chloride paste resins, has made 17 technical adjustments compared with the 2008 version, mainly involving:

Analysis of key technical parameters

1. Classification system

Six-segment model coding: PVC-□P,aA/B,b, among which:

• Polymerization method code: E (emulsion method), X (micro-suspension method, etc.)
• Viscosity code: Corresponding K value range 60.5-79.1 (see Table 1 for details)
• Standard paste viscosity: divided into 5 levels (≤3.0Pa·s to >13.5Pa·s)

2. Core performance requirements

Innovation in detection methods

1. Determination of volatile matter: GB/T2914-2008 method A is clarified as the arbitration method
2. Scraper fineness: Add a time limit requirement of completing within 3 hours after paste preparation
3. Residual monomer detection: gas chromatography (detection limit ≤ 5μg/g)

Implementation suggestions

Manufacturers should pay special attention to:

• The type inspection cycle is shortened from 6 months to 3 months
• The packaging label needs to add a "fear of rain" icon (in line with GB/T191)
• The number of sampling units is determined in accordance with the latest version of GB/T6678