Industry Background And Current Situation

The processing of masterbatches has strict requirements on compounding technology and equipment: pigments and additives, and the base resin components must be absolutely and accurately metered, and then uniformly dispersed and mixed by compounding systems such as twin-screw extruders and internal mixers. into the base resin.

The concept of masterbatch refers to the concentration of pigments or additives into a resin matrix. The color masterbatch is generally a standard 3-5mm particle size, and there are also 1mm micro particles. According to different types of pigments, masterbatches are generally divided into white, black and colored. The production of color masterbatch can be pre-mixed, sub-added or color matching process.

At present, the domestic production of color masterbatch, pigments, additives, and basic resin components are mostly manual premixing processes, that is, manual feeding and metering are required to achieve. This process has a low degree of automation, poor formulation accuracy, and large environmental pollution. In recent years, the use of loss-in-weight scales in the production of black and white masterbatches increases the separate addition process, which improves the accuracy and stability of the formulation and reduces environmental pollution.。

Typical Application

-Color Masterbatch

-Special pigment effect masterbatches, such as pearlescent masterbatches

-Charcoal black masterbatch

-White masterbatch

-PET fiber masterbatch

Metered Color Schemes

Color matching process：

The color matching process is generally a high-end application. Different toners are fed separately using a loss-in-weight feeder, added to the extruder, and plasticized, mixed, and produced in the desired color product. The matrix resins commonly used in this process are PE, PP and PA, PET. Accurate loss-in-weight feeders ensure acceptable final product quality.

Typical Raw Material Composition

Resin: particle, bulk density 0.5-0.7Kg/L; good fluidity

Toner: powder, bulk density 0.2-0.4Kg/L; poor fluidity

Auxiliary: powder, bulk density 0.2-0.4Kg/L; general fluidity

Auxiliary: mixing of granules and powder, bulk density 0.3-0.4Kg/L; general fluidity

Process characteristics

Each raw material is individually cut and accurately measured, which is very simple and convenient in batching operation.

Just clean the toner feeder and refill section

The site is relatively clean and easy to control

It has certain advantages for production lines that require a certain color change frequency

The toner and other raw materials are not soaked in advance, so the dispersion requirements of the extruder are relatively high.

Common Equipment Composition

refill silo

refill valve

Loss-in-weight feeder

Aggregate silo

Twin screw extruder or continuous mixer

Advantages of Loosenite Loss-in-Weight Feeders

Stable feeding accuracy even with small feed volumes

Excellent anti-bridging performance, our flow control is more precise in the face of difficult toner toner

Tool-less quick release design makes cleaning and replacement easier