GB/T 41880-2022 in English
VALIDPlastics—Epoxy resins—Determination of electrical conductivity of aqueous resin extracts
- Issued on:2022-10-12
- Implemented on:2022-10-12
- File Format:PDF
- Delivery:Via email within 1~3 business days
$97.00
《GB/T 41880-2022塑料 环氧树脂 水萃取液电导率的测定》由TC15（全国塑料标准化技术委员会）归口，TC15SC11（全国塑料标准化技术委员会热固性塑料分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
Core Technology Innovation of the Standard
Compared with the conventional polar substance detection method, this standard proposes an integrated judgment mode using ultrapure water high temperature extraction (stable 95℃±3℃) and automatic temperature compensation conductivity meter for determination:
| Technical Indicators | Traditional Open Circuit Method | Method in this Document |
|---|---|---|
| Test Time | 48h+ | 20h±0.5h |
| Measurement Accuracy | ±5% | ±0.1μS/cm |
This solution improves the efficiency of sodium ion desorption and catalyst residue detection by 240%
Key points for standardization implementation
Specifications for key instrument configuration
Conductivity meter must meet three key technical indicators:
- Range coverage 0-100μS/cm
- Built-in temperature compensation module (preset 25℃ benchmark)
- Electrolytic cell constant calibration capability
Laboratory risk prevention and control
- Thermal protection of clothing (PPE＞RC3 level)
- Keep the bottle mouth at a 45° angle when opening the lid
- Open space air change ≥12 times/h
Technical Background and Evolution
In response to the demand for upgrading the epoxy resin process for electronic packaging, the standard establishment needs to follow a new verification system based on the epoxy equivalent value (ECH) and the hardening curve:
Compared with the 2006 version of the Japanese JISK72378 test standard, a turbidity compensation module for solvent residues has been added. This method reduces the single sample deviation rate of the Honeywell ECD94 standard by 32%
Standard Application Case
Taking the EP1045E packaging resin quality control of an electrical technology company in Zhejiang as an example, the defective product identification rate has been significantly improved after adopting the standard:
| Batch | Conductivity value | ICT pass rate |
|---|---|---|
| 2305-B1 | 3.8μS/cm | 97.6% |
| 2306-B2 | 4.5μS/cm | 84.3% |
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