Color masterbatch is an indispensable color matching material in injection molding, which is applied in most processes such as hot resin injection molding, pelletizing, pressing plates, blow films, wires, pipes, etc.

The quality of color masterbatch affects color matching, and there are eleven factors to measure the quality of color masterbatch:

Appearance

1. Color uniformity: The color master batch should have a uniform color distribution, without color differences or spots, that is, it should visually present a uniform and consistent color.

2. Particle shape: The shape of the color master batch should be regular and uniform, and there should be no abnormal shape or poor condition, such as uneven particles, agglomeration, etc.

3. Surface smoothness: The surface of the color master batch should be flat and smooth, without obvious surface defects such as bumps, burrs, or roughness.

4. Clarity: The color of the color master batch should be clear and distinct, without any blurry or unclear color boundaries.

5. Impurities: There should be no obvious impurities, foreign objects, etc. in the color master batch. If there are other colors or impurities mixed in the particles, they should meet the specified quality requirements.

6. Intact packaging: The packaging of the color masterbatch should be intact and free from damage or leakage, and the packaging materials should comply with relevant specifications.

Concentration of two pigments

1. Visual color comparison: By visual comparison, determine the intensity of the color masterbatch. Generally, standard color cards are used to compare with samples to determine the concentration of colors. Visual colorimetry is a simple and intuitive method, but it has strong subjectivity, and different visual judgments may have differences.

2. Colorimeter measurement: A colorimeter is an instrument used to measure the color of an object. Determine the concentration of color masterbatch by measuring parameters such as wavelength, intensity, and reflectivity of light. Colorimeters provide objective color concentration data that can quantitatively represent the concentration of colors.

3. Spectral analysis: Spectral analysis is the process of obtaining spectral data of colors by measuring the absorption, reflection, or transmission characteristics of light by an object. By analyzing spectral data, the concentration of color masterbatch can be determined and numerical results can be obtained.

4. Color difference measurement: The color difference indicator is a numerical indicator used to measure the difference between a sample and a standard color. By measuring the difference between the sample color and the standard color, the concentration information of the excellent parent color can be indirectly obtained.

Tricolor phase data

1. Lab value: Lab is a color space based on human visual perception, used to describe the brightness, green red contrast, and blue yellow contrast of colors. In the Lab space, the color masterbatch is represented by an L value (brightness), a value (red green component), and b value (yellow blue component). Lab values can measure color deviation and consistency by comparing the differences between standard colors and the colors to be tested.

2. CIE chromaticity coordinates: CIE is the abbreviation of the Commission Internationale de l'Eclairage, and a CIE chromaticity map is a graph that reflects all colors within the visible light range. The hue data of the color masterbatch can be represented using coordinates on the CIE chromaticity map, such as xy or UV coordinates. CIE chromaticity coordinates can accurately locate the position of colors on a chromaticity map, which is of great significance for color matching and comparison.

3. Coloring power: The coloring effect of the color master batch meets the requirements and can have good performance and stability in practical applications.

4. Blackness: Ensure that the blackness quality of the color masterbatch meets the requirements, and can have good black coloring effect and stability in practical applications. It is necessary to select appropriate blackness indicators based on specific application requirements, and conduct corresponding testing and evaluation.

(Other colors have corresponding names, such as whiteness, yellowness, etc.)

Four Melt Index

1. Melt Flow Rate (MFR): The melt flow rate refers to the weight of the melt that flows out of the color master batch through a standard aperture mold per unit time at a specific temperature and pressure. The MFR value is usually expressed in g/10 minutes or g/10 minutes, with higher values indicating better melt fluidity and higher processing performance.

2. Melt flow rate (MVR): The melt flow rate is the volume of color masterbatch flowing out of the set container in a unit time under the molten state. The MVR value is usually expressed in cm ³/ 10 minutes or cm ³/ 10min indicates that, similarly, a larger value indicates better melt fluidity and higher processing performance.

Pentadispersity

1. Particle size distribution: The distribution of particle size can reflect the uniformity of the color master batch. The smaller particle size and narrow particle size distribution range indicate good dispersion of color masterbatches.

2. Dispersion: Dispersion refers to the degree of dispersion of color masterbatches in the substrate. Good dispersion means that the color masterbatch can be evenly dispersed in the substrate, avoiding agglomeration or stacking.

3. Dispersion time: Dispersion time refers to the time required to add the color masterbatch to the substrate and achieve uniform dispersion. A shorter dispersion time indicates that the color masterbatch can be quickly and uniformly dispersed in the substrate.

4. Dispersion effect: The dispersion effect refers to whether the color of the color masterbatch can evenly penetrate the entire substrate, avoiding spots, color differences, or unevenness.

Six Compatibility

1. Compatibility between color masterbatch and substrate: Color masterbatch pigments should have good compatibility with the substrate, that is, they can be fully mixed with the substrate to evenly disperse the color in the substrate, avoiding agglomeration, peeling, or separation.

2. Property change of base material: high-quality color masterbatch has little effect on property change of base material, such as solubility, cracking resistance, aging resistance, physical properties, etc. The presence of color masterbatch should not significantly damage the performance and quality of the substrate.

3. Thermal stability: The color masterbatch should have good thermal stability at processing temperature, which is not easy to decompose, evaporate, or cause color changes to ensure the stability and durability of the coloring effect.

4. Dynamic compatibility: The compatibility of color masterbatch should consider the dynamic conditions in actual production processes, such as mixing, extrusion, injection molding, etc., to maintain stable dispersion and coloring effect during these processes.

  Heat resistance

1. Melting point: The melting point of a color masterbatch refers to the temperature at which the color masterbatch begins to melt when heated. A higher melting point indicates that the color masterbatch can maintain stability at higher temperatures and is less likely to decompose or lose color.

2. Thermal weight loss: Thermal weight loss refers to the percentage of mass lost in the color master batch system during the heating process. By measuring the thermal weight loss of color masterbatch within a certain temperature range, its heat resistance performance can be evaluated.

3. Heat resistance and oxidation resistance: The color masterbatch should be able to resist oxidation reactions at high temperatures and not prone to oxidative decomposition or fading. This can be evaluated by evaluating the stability and oxidation indicators of the color masterbatch, such as delayed fading time, color difference changes, etc.

4. Thermal stability: Thermal stability refers to the stability of a color masterbatch that can maintain its color and performance within a certain temperature range. By testing the stability of color masterbatch during hot processing, such as melting fluidity, color stability, and other indicators, its heat resistance performance can be evaluated.

5. High temperature processing performance: The processing performance of the color masterbatch at high temperatures is also an important indicator of heat resistance. This includes its dispersibility, flowability, stability, and uniformity during high-temperature processing such as extrusion, injection molding, and molding.

Eight resistance to migration

1. Migration rate: Migration rate refers to the percentage of color masterbatch pigments that migrate from a color source (such as plastic, ink, etc.) to contact objects, liquids, or food. Measure and evaluate the migration rate through laboratory testing or simulation of actual usage conditions to determine the migration of color masterbatch.

2. Release test: By simulating actual usage conditions, such as soaking, coating, etc., standard testing methods are used to evaluate whether masterbatch pigments will release substances harmful to human health or migrate to contact objects or food.

Sun resistance

The level is divided into 1-8 levels, and the larger the level, the better the effect

1. Light stability: Color masterbatch pigments should have good light stability, which can resist color changes, fading, or degradation caused by sunlight or ultraviolet radiation. The evaluation of light stability can be conducted through laboratory tests and actual exposure tests to measure and evaluate the stability of masterbatch pigments under specific lighting conditions.

2. Color retention: The color retention ability of masterbatch pigments refers to the ability of masterbatch pigments to maintain color stability and brightness after long-term exposure to sunlight or ultraviolet radiation. By comparing the color difference changes of color masterbatch under different lighting conditions, its color retention ability can be evaluated.

3. UV resistance: UV resistance refers to the resistance of color masterbatch pigments to UV radiation. Good UV resistance can reduce color changes and surface aging caused by UV radiation.

4. Weathering resistance: The weathering resistance of masterbatch pigments refers to their durability and stability under outdoor exposure or special environmental conditions. This includes evaluation of resistance to solar aging, oxidation, temperature changes, and other aspects.

Ten weather resistance

The level is divided into 1-5 levels, and the larger the level, the better the effect

1. Anti solar aging: Anti solar aging refers to the aging phenomenon caused by the resistance of color masterbatch pigments to ultraviolet radiation. It is usually evaluated by exposure to ultraviolet radiation in artificially accelerated aging equipment, and measures the physical properties and color stability of the sample before and after aging.

2. Antioxidant activity: Antioxidant activity refers to the resistance of masterbatch pigments to oxidation reactions. Good antioxidant properties can reduce color changes and fading caused by oxidation.

3. Temperature resistance: The temperature resistance of color masterbatch pigments refers to the ability to maintain their color stability and performance under temperature changes or extreme temperature conditions.

4. Resistance to humidity changes: The resistance to humidity changes of color masterbatch pigments refers to their stability in humid environments. Good resistance to humidity changes can reduce problems such as discoloration, deformation, or decomposition caused by humidity.

5. Chemical resistance: The stability and resistance of masterbatch pigments to common chemical substances such as acids, alkalis, solvents, etc. Color masterbatch should have a certain degree of chemical resistance and be not easily corroded by chemicals or cause adverse reactions.

Eleven Environmental Protection

Plastic products face requirements from different regions, fields, and regulations, such as content testing reports for restricted substances, environmental standards Rohs, EN71-3, FDA, PAhs, etc.