GB/T 34323-2017 in English

VALID

Carbon black--Determination of light transmittance of water dispersion--Spectrophotometer method

Issued on:2017-09-07
Implemented on:2018-04-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $100.00
$97.00

Standard No:	GB/T 34323-2017
Document status:	VALID
Title in English:	Carbon black--Determination of light transmittance of water dispersion--Spectrophotometer method
Title in Chinese:	炭黑水分散体透光率的测定分光光度计法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2017-09-07
Implemented on:	2018-04-01
ICS Classification:	83.040.30-Auxiliary materials and additives for plastics
Professional Classification:	GB-National Standard
Related Keywords:	black dispersion spectrophotometer method black aqueous dispersion light transmittance black test method multiple methods coexist
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《GB/T 34323-2017炭黑水分散体透光率的测定分光光度计法》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，TC35SC5（全国橡胶与橡胶制品标准化技术委员会炭黑分会）执行，主管部门为中国石油和化学工业联合会。

Introduction

GB/T 34323—2017 Standard Overview

GB/T 34323—2017 "Spectrophotometric method for determination of light transmittance of carbon black aqueous dispersion" is an important national standard for China's carbon black industry. It mainly stipulates the method of determining the light transmittance of carbon black aqueous dispersion using a visible spectrophotometer. This standard is applicable to coated super water-dispersible carbon black and is a key technical document for evaluating the dispersion performance of carbon black in water.

Background and significance of standard formulation

As an important industrial material, carbon black is widely used in rubber, coatings, inks and other fields. Its dispersion performance in water directly affects the quality and performance of the final product. However, for a long time, the industry lacked unified testing methods and standards, resulting in inconsistent test results and affecting product quality control.

The formulation of GB/T 34323-2017 fills this gap and provides a scientific and standardized testing method for the carbon black industry, which has important industry guidance significance and technological progress value.

Comparison of standard frameworks and technological evolution

Dimensions Characteristics of the old standard Improvements of the new standard

Scope of application The type of carbon black is not clearly defined It is clearly stipulated that it is applicable to coated super water-dispersible carbon black

Test method Multiple methods coexist and lack uniformity Uniformly adopt the spectrophotometer method and standardized operation

Technical requirements No clear specifications for detection accuracy and repeatability Clearly put forward the precise requirements and error control for transmittance measurement

Data analysis The data processing method is simple and lacks systematicity Introducing the GB/T 8170 numerical rounding rules to improve the scientific nature of the data

Implementation suggestions and actual operation cases

Key points for laboratory implementation:

Ensure the accuracy and calibration cycle of the spectrophotometer. It is recommended to send it for inspection regularly to ensure the stability of the equipment.

In the process of preparing the dispersion, strictly control the mass ratio of carbon black to water (1:2000) according to the proportion to avoid deviations in the test results due to preparation errors.

For rapid testing in production, the standing time can be shortened to 20 minutes, but it is recommended to regularly verify the impact of shortening the time on the results.

Actual application case:

After a rubber company adopted this standard, the uniformity of carbon black dispersion was significantly improved, and the consistency of the product was significantly improved. By establishing a standardized laboratory and training professional testing personnel, the company achieved an overall improvement in product quality.

More samples: JGJ 94-2008 DL/T 368-2010 YD/T 3934-2021

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Dimensions	Characteristics of the old standard	Improvements of the new standard
Scope of application	The type of carbon black is not clearly defined	It is clearly stipulated that it is applicable to coated super water-dispersible carbon black
Test method	Multiple methods coexist and lack uniformity	Uniformly adopt the spectrophotometer method and standardized operation
Technical requirements	No clear specifications for detection accuracy and repeatability	Clearly put forward the precise requirements and error control for transmittance measurement
Data analysis	The data processing method is simple and lacks systematicity	Introducing the GB/T 8170 numerical rounding rules to improve the scientific nature of the data