GB/T 46231.1-2025 Active
GB/T 46231.1-2025 Plastics—General test method for polyurethane raw materials—Part 1:Determination of hydroxyl number of polyols by NIR spectroscopy
Abstract
This document describes the method of determining the hydroxyl value of polyols using near-infrared spectroscopy. It provides relevant definitions and explanations of modeling techniques, establishes procedures for selecting calibration samples, collecting and processing data during the modeling process, and also sets out criteria for establishing, evaluating, and validating near-infrared models, as well as procedures for sample processing, data acquisition, and model evaluation.
This document is applicable to research, quality control, specific testing, and process control of polyols used in polyurethane production.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 46231.1-2025 |
| CCS | Basic standards and general methods for synthetic resins and plastics |
| ICS | Thermosetting plastics |
| Implement Date | 2026-03-01 |