GB/T 34263-2017 in English
VALIDHydroxypropyl methyl cellulose for industrial use
- Issued on:2017-09-07
- Implemented on:2018-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$175.00
《GB/T 34263-2017工业用羟丙基甲基纤维素》由TC63（全国化学标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
Introduction
Interpretation of GB/T 34263—2017 National Standard of the People's Republic of China
This standard specifies the model, requirements, test methods, inspection rules, packaging, labeling, storage and transportation of industrial hydroxypropyl methylcellulose (HPMC), and is applicable to hydroxypropyl methylcellulose produced from refined cotton or other cellulose as raw materials.
Background of Standard Formulation and Analysis of Technological Evolution
Hydroxypropyl methylcellulose is an important industrial thickener, stabilizer and binder, widely used in construction, petroleum, textile, food and other fields. With the expansion of its application fields and the improvement of technical requirements, the demand for standardization is becoming increasingly urgent.
Comparative Analysis of Standard Frameworks
| Project Dimensions | Differences between the Old Version of the Standards | Improvements in the New Version of the Standards | International Integration |
|---|---|---|---|
| Technical Indicators | - Deleted some outdated technical requirements | - Added new indicators such as gel temperature range and transmittance | Consistent with relevant ISO standards |
| Test Methods | - Simplified some detection processes | - Optimized gas chromatography and gel temperature determination methods | In line with internationally accepted standards |
Technical requirements and index interpretation
According to Table 1, the technical indicators of industrial hydroxypropyl methylcellulose include:
- Hydroxypropoxy content/%: The range of different models of products is significantly different.
- Methoxy content/%: It is inversely correlated with the hydroxypropoxy content.
- Gel temperature range (0.2% aqueous solution)/℃: It reflects the thermal stability of the material.
- Ash content (calculated as sulfate)/%: ≤5.0, to ensure product purity.
Implementation suggestions and precautions
1. Manufacturers should strictly carry out raw material screening and process control in accordance with standard requirements, focusing on the accurate determination of hydroxypropoxy and methoxy content.
2. In actual applications, it is recommended to select the appropriate model of HPMC products according to the specific application scenario to ensure that the temperature, pH value and other conditions of the use environment are met.
3. The inspection department should strengthen sampling inspection, pay special attention to key indicators such as gel temperature and transmittance, and ensure that product quality meets standard requirements.
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