Introduction Of Basic Knowledge Of Color Masterbatch (Color Seed) (Part 2)

1, What are the varieties and grades of colorants?

The commonly used classification methods for colorants are as follows:

Classified by carrier: such as PE masterbatch, PP masterbatch, ABS masterbatch, PVC masterbatch, EVA masterbatch, etc. Classified by purpose: such as injection masterbatch, blow molding masterbatch, spinning masterbatch, etc. Each variety can be divided into different grades, such as:

1. Advanced injection colorants:

Used for cosmetic packaging boxes, toys, electrical appliance casings, and other high-end products.

2. Ordinary injection colorants:

Used for general daily plastic products, industrial containers, etc.

3. Advanced blown film color masterbatch:

Used for blow molding coloring of ultra-thin products.

4. Ordinary blown film color masterbatch:

Used for blow molding coloring of general packaging bags and woven bags.

5. Spinning masterbatch:

Used for textile fiber spinning coloring, the pigment particles are fine, the concentration is high, the coloring power is strong, and the heat and light resistance are good.

6. Low level colorants:

Used for manufacturing low-level products with low requirements for color quality, such as trash cans, low-level containers, etc.

7. Special color masterbatch:

It is a color masterbatch manufactured using the same plastic as the carrier based on the plastic variety specified by the user for the product. For example, PP masterbatch and ABS masterbatch are respectively used as carriers. Universal colorant: It also uses a certain resin (often low melting point PE) as a carrier, but it can be used for coloring other resins besides its carrier resin.

8. Universal color masterbatch:

Universal colorants are relatively simple and convenient, but they have many disadvantages. It is recommended that users choose specialized colorants. The heat resistance level of specialized colorants is generally suitable for the plastic used in the product, and can be used with confidence at normal temperatures. Only in the following situations can it cause varying degrees of discoloration: one is when the temperature exceeds the normal range, and the other is when the shutdown time is too long.

9. Compared with granulation coloring, masterbatch coloring has the following advantages:

9.1. Coloring and product processing can be completed in one go, avoiding the heating process of granulation coloring on plastics, which is beneficial for protecting the quality of plastic products.

9.2. Simplify the production process of plastic products.

9.3. It can save a lot of electricity.

2, Why use colorants?

The use of colorants has the following advantages:

1. Improve the dispersibility of pigments in products: Masterbatches are aggregates made by uniformly attaching a super constant amount of pigments to a resin. During the production process of colorants, it is necessary to refine the pigments to improve their dispersibility and coloring power. The carrier of the specialized color masterbatch is the same as the plastic variety of the product, with good compatibility. After heating and melting, the pigment particles can be well dispersed in the plastic of the product.

2. Beneficial for maintaining the chemical stability of pigments: If pigments are used directly, due to direct contact with air during storage and use, they will undergo phenomena such as water absorption and oxidation. However, after being used as colorants, the resin carrier can isolate the pigments from air and moisture, which can maintain their quality for a long time.

3. Ensure the stability of product color: The color masterbatch particles are similar to the resin particles, making measurement more convenient and accurate. When mixed, they will not adhere to the container, and the mixing with the resin is also relatively uniform, thus ensuring the stability of the added amount and the stability of the product color.

4. Protecting the health of operators: Pigments are generally in powder form and can easily fly when added and mixed. Inhalation by the human body can affect the health of operators.

5. Keep the environment clean and do not contaminate utensils:

6. Simple process, easy color conversion, saving time and raw materials: Due to the direct contact of pigments with air during storage and use, phenomena such as moisture absorption, oxidation, and agglomeration may occur. Direct use will result in color spots on the surface of plastic products, darkening and fading colors, and causing dust to fly during mixing, affecting the health of operators. During the production process, the color masterbatch undergoes mechanical processing to refine the pigments. The pigments are thoroughly mixed with resin carriers and dispersants to isolate them from air and moisture, thereby enhancing their weather resistance, improving their dispersibility and coloring power, and resulting in a bright color.

Due to the similar shape of color masterbatch and resin particles, it is more convenient and accurate in measurement, and will not adhere to the container during mixing, thus saving time for cleaning containers and machines, as well as raw materials used for cleaning machines.