KR-735 Micro Carbon Black Dispersion Tester for Plastics

Category 2. Plastic Testing Machine

Additional information

ISO 18553 ASTM D1603 Lab Rubber Plastic Content Carbon Black Dispersion Tester

The RT-741 Carbon Black Dispersion Detector is a detection instrument for pigments or carbon black dispersions in hydrocarbon pipes, fittings, and mixtures, as specified in the international standard ISO/ASTM. It can measure the size, morphology, and dispersion of carbon black particles and clusters, as well as the number of particles and clusters and carbon black dispersion levels.

Product Details：

Standards compliant

1. ASTM-D3015-95 Microscopic test method for pigment dispersion in plastic blends.

2. GB/T 2951.41-2008 General Test Methods for Insulation and Sheath Materials of Cables and Optical Cables.

3. ASTM-D5596-94 Method for Microscopic Analysis and Testing of Carbon Black Dispersion in Polyolefin Geosynthetics.

4. ISO11420:1996 Method for determination of carbon black dispersion in polyolefin pipes, fittings and mixtures.

5. ISO13949:1997 Method for determination of pigment dispersion in polyolefin pipes, fittings and mixtures.

6. GB/T15065-94 Determination of dispersion of black polyethylene plastic carbon black for wires and cables.

7. ISO/DIS18553:1999 Determination of dispersion of pigments or carbon black in polyolefin pipes, fittings and mixtures.

8. GB/T18742: Polypropylene piping systems for hot and cold water.

9. GB/T18251: Method for determination of pigment or carbon black dispersion in polyolefin pipes, fittings and mixtures.

10. GBT6030-2006 Rapid comparison method for evaluation of carbon black and carbon black silica dispersion in rubber.

11. ISO 11345 Rubber, Evaluation of Carbon Black and Carbon Black/Silica Dispersion, Rapid Comparison Method.

Product Overview

The KR-735 Micro Carbon Black Dispersion Tester is a specialized laboratory instrument designed to evaluate the dispersion quality of carbon black and other fine additives within plastic and polymer materials. It helps manufacturers quickly identify uneven distribution, particle agglomeration, and poor mixing that can affect the mechanical properties, surface appearance, and batch consistency of finished plastic products.

This tester is particularly suitable for quality control in plastic compounding, masterbatch production, film extrusion, sheet production, and injection molding processes. By providing a reliable visual and quantitative assessment of carbon black dispersion, it helps labs and production teams optimize formulation, mixing parameters, and raw material screening.

Product Parameters

Model	KR-741
Detection Range	1um —1cm
Imaging Resolution	1/1.8-inch 6 million high-definition camera
Sample aperture	4mm
Optical magnification	4,10,40,100 times (option)
Test Area	1.7 mm×1.25 mm
Image Size	3072×2048
Test Software	“Carbon Black Dispersion Detection System”, suitable for Windows 7/Windows 10/Windows XP
Power Supply	220V /2A/50Hz

Key Advantages

1. Clear Observation of Dispersion Quality

The KR-735 allows users to observe the distribution state of carbon black particles inside plastic samples through microscopic inspection. It can effectively distinguish between well-dispersed areas and poorly dispersed zones, helping operators evaluate mixing performance without relying solely on physical property tests.

2. Simple Sample Preparation

Samples can be prepared by hot pressing or microtoming according to different material characteristics. The instrument is designed to work with thin slices or pressed specimens, making it suitable for a wide range of polymers, including polyethylene, polypropylene, PVC, and other plastic compounds.

3. Fast QC Screening

Compared with more complex extraction or dissolution methods, this dispersion tester provides faster results for routine production checks. It is especially useful for incoming material inspection, batch release testing, and troubleshooting when surface defects or property variations occur.

4. Compact and Laboratory-Friendly Design

With a bench-top structure and small footprint, the KR-735 can be easily placed in quality control labs, R&D rooms, or factory inspection stations. Its simple operation allows technicians to perform dispersion checks without extensive training.

5. Helps Improve Formulation Stability

By identifying poor carbon black dispersion at an early stage, the instrument supports better control over mixing time, temperature, screw speed, and additive feeding sequence. This can lead to more consistent product quality and fewer production rejects.

Plastic Carbon Black Dispersion Detector

Typical Applications

Plastic compounding factories
Masterbatch manufacturers
Film and sheet extrusion lines
Injection molding quality control laboratories
Polymer R&D departments
Raw material incoming inspection stations
Third-party plastic material testing institutions

Test Principle

The test evaluates how uniformly carbon black is distributed within a plastic matrix. After proper sample preparation, the specimen is observed under controlled magnification. The distribution, size, and concentration of carbon black aggregates are assessed to determine whether the material meets internal quality standards or technical specifications.

A good dispersion result indicates that carbon black has been adequately incorporated into the polymer matrix, while excessive agglomeration may suggest insufficient mixing, incorrect processing parameters, or poor raw material quality.

Standard Test Procedure

Sample Preparation

Prepare a representative plastic specimen using hot pressing, microtoming, or another suitable method to ensure a flat and clean surface.
Instrument Setup

Place the sample on the observation stage and adjust the instrument for clear viewing.
Dispersion Observation

Examine the distribution of carbon black particles across different areas of the specimen.
Result Evaluation

Assess the degree of dispersion based on particle distribution, aggregate size, and uniformity.
Quality Judgment

Compare the observed result with the acceptable quality standard to determine whether the sample passes or requires process adjustment.
Cleaning and Storage

Clean the instrument and store samples properly for record-keeping or further analysis.

Delivery Scope

KR-735 main unit
Observation and inspection assembly
Sample stage or specimen holder
Standard accessories for sample preparation
Operation manual
Factory inspection certificate

After-Sales Support

We provide remote operation guidance, technical consultation, and long-term support for replacement parts. For bulk orders, customized configurations, special sample holders, and OEM labeling can be discussed according to customer requirements.

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KR-735 Micro Carbon Black Dispersion Tester for Plastics

Feature Tags:

Carbon Black Dispersion Analysis / Plastic Compound QC / Micro Observation / Fast Routine Test / Compact Lab Design

Application Tags:

Masterbatch / Film Extrusion / Injection Molding / Polymer R&D

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KR-735 Micro Carbon Black Dispersion Tester for Plastics

KR-735 Micro Carbon Black Dispersion Tester for Plastics

Additional information

ISO 18553 ASTM D1603 Lab Rubber Plastic Content Carbon Black Dispersion Tester