GB/T 35859-2018 in English
VALIDDetermination of ethylene glycol monoethyl ether insoluble contents in polymer materials for offset printing plates—Filtering method
- Issued on:2018-02-06
- Implemented on:2018-09-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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《GB/T 35859-2018胶印版材用高聚物中乙二醇单乙醚不溶物含量的测定 过滤法》由TC432（全国数码影像材料与数字印刷材料标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
Introduction
GB/T 35859—2018 Standard Overview
National Standard of the People's Republic of China GB/T 35859—2018 "Filtration Method for Determination of Insoluble Matter Content of Ethylene Glycol Monoethyl Ether in Polymers for Offset Printing Plates" specifies the method for determining the insoluble matter content of ethylene glycol monoethyl ether in polymers for offset printing plates by filtration. This standard is applicable to the determination of insoluble matter content in various polymers soluble in ethylene glycol monoethyl ether to ensure that product quality and performance meet industry requirements.
Background and Significance of Standard Formulation
With the rapid development of digital printing technology, the demand for offset printing plates continues to increase. Ethylene glycol monoethyl ether, as an important component of polymer materials, may introduce insoluble impurities during production and application. These impurities not only affect the performance of the material, but may also cause damage to printing equipment. Therefore, it is of great significance to formulate a unified standard to determine and control the insoluble matter content.
Method principle and technical route
This standard adopts the filtration method to determine the insoluble matter content of ethylene glycol monoethyl ether. Its core steps include:
- full dissolution of the polymer sample;
- Filtering and separation using an oil-soluble filter membrane with a pore size of $0.45~\mu\mathrm{m}$;
- Calculating the insoluble matter content by vacuum drying and weighing the change in filter membrane mass.
| Step Name | Key Instruments | Operation Points |
|---|---|---|
| Sample Dissolution | Electromagnetic Stirrer | Ensure that the polymer is fully dissolved in ethylene glycol monoethyl ether |
| Filtration Separation | Solvent Filter | Use an oil-soluble filter membrane with a pore size of $0.45~\mu\mathrm{m}$ |
| Vacuum Drying | Glass Vacuum Dryer | Evacuate to above $66.66~\mathrm{kPa}$ for a duration of not less than $1\mathrm{h}$ |
Recommendations for implementation of the standard
In order to ensure the accuracy and consistency of the measurement results, it is recommended in actual operation:
- Strictly control the experimental conditions in accordance with the standard requirements (temperature $23~^\circ\mathrm{C}\pm3~^\circ\mathrm{C}$, relative humidity $40\%\sim80\%$);
- Regularly calibrate the instruments and equipment to ensure that their accuracy meets the requirements (for example, the accuracy of the electronic balance should reach $0.1\mathrm{mg}$);
- Strengthen personnel training, especially focusing on the operating specifications of complex steps such as filtration and vacuum drying.
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