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.
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.
Rigid PVC processing
Powder injection molding materials
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.
Liquid Spraying for Coating
According to different formula,, many customers request spraying solvents to the masterbatch to achieve uniformly coating. Generally in this case, the high speed design plough mixer (LDH-Series) is more suitable. Ploughs forms shearing and perfect mixing is done under high-speed running. Besides, high-speed chopper system on the mixer body can help break up the agglomerated material.
For granular plastic materials, we should pay attention to avoid particle reduction in the mixing process. The clearance between agitator and mixer body can't be too small, otherwise the plastic granules will be stuck in the gap and cause damage to the physical shape after friction. We recommend conical screw mixer (DSH-Series) or double shaft paddle mixer (WZ-Series). For large batch capacity, DSH-Series will be the ideal choice. If it's small capacity, WZ-Series can reach high mixing uniformity in a very short period of time.
住友电木 Sumitomo Bakelite
帝人化成复合塑料 Teijin Chemicals
新和成特种材料 Zhejiang NHU
嘉盛化学 FOREX Jiangsu Sunchem
长新树脂 Allnex-Eternal Resins