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Mixing Solutions for Plastic Industry

Plastics are widely used in our daily life. With the advantages of rich raw materials sources, low cost, easy molding and processing, high productivity, light components, wear resistance, corrosion resistance, good electrical insulation, sound damping and shock absorption, it is widely applied in industrial and agricultural production, transportation, aviation, aerospace, CRH, automobiles, building materials, home appliances, electric, packaging, medical and other fields.Plastic powder, plastic ultra-fine powder, resin powder is a synthetic polymer compound, also called macromolecules or giant molecules, also commonly known as plastics or resin. The shape and style can be changed arbitrarily. It is a kind polymer by synthesis or condensation reaction including components like synthetic resin and fillers, plasticizers, stabilizers, lubricants, pigments and other additives.

 

Production Process

The production of plastic products often requires formula design to prepare powder and pellets according to the product performance requirements. During its preparation, the polymer and various additives are initially mixed through mixing equipment to make powder, then plasticized by a plasticizer, and finally plastic particles are made by a pelletizer. The process is actually to mix various ingredients with each other to achieve a uniform state as much as possible. Generally, equipment and processes such as mixing, kneading and plasticizing are required, which are completed by diffusion, convection, and shearing. The preparation of raw materials generally includes pretreatment, weighing and transportation. It is often necessary to add different proportions of stabilizers, fillers, pigments or other additives to the masterbatch to achieve the function of final product.

 

 

Applications

Rigid PVC processing

PVC material

PVAL material

Polyolefin PP/PE

EPS

Powder coating

Rubber

Powder injection molding materials

Adhesive solvent

 

Mixer Selection

Common mixing

For conventional mixing at room temperature and pressure, we recommend horizontal ribbon mixer (WLDH Series) and Double-screw conical mixer (DSH-Series), which are relatively gentle mixing and can deal with simple mixing requirements. WLDH is more convenient for maintenance and cleaning, but DSH can achieve complete discharge for its vertical structure. For more details about mixing principle and structure, please refer to the product introduction on our website.

 

Mixing with Heating/cooling

During mixing process, heating and cooling function are required for some materials such as modified plastics, EVA and other materials. We put heating or cooling jacket outside of our mixer. The special designed jacket can achieve uniform heating and avoid the uneven temperature of the upper and lower section jacket, or too small heat exchange area. Heating medium is generally hot water, hot oil or steam, and the pressure is in the range of 3-10 bar. The cooling medium is generally condensed water with a pressure of 3-5bar. The mixer needs to be preheated before feeding and mixing.