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What is Specialty Compounding?

Sep 12th 2015 at 3:25 AM


Compounding is a process of melt blending plastics with other additives. This process changes the physical, thermal, electrical or aesthetic characteristics of the plastic. The final product is called a compound or composite.


Compounding starts with a base resin or polymer. Many compounding companies have experience with more than 60 resin systems, each of which has unique characteristics that make it suitable for use in certain applications.


By incorporating an extensive range of additives, fillers, and reinforcers, a wide range of properties can be achieved in conductivity, flame retardance, wear resistance, structural, and precolored. In the process, engineers independently select the additives based on the required performance criteria. For example, glass fibers can be added at various levels to increase stiffness in a resin that is more flexible than desired.


Compounding is done in several steps. Resin and additive(s) are fed through an extruder where they are combined. The melted compound exits the extruder in strands about the diameter of strand of yarn. These strands are cooled and cut into pellets. The pellets are thoroughly inspected and must pass quality checks before being delivered to customers for use in injection molding or sheet extrusion. Specialty compounding is an exacting and creative, science. The compounding can be customized depending on the market requirements. Generally the process of custom compounding starts with a polymer or a base resin.


There are companies that offer these services in order to reduce the plastic wastes and recycle it. Compounding is the process of blending plastic with other additives and fillers. The process of compounding changes the physical, thermal, electrical as well as the aesthetic characteristics of the plastic permanently. Companies that deal with compounding use different kinds of resins in order to make different applications. By means of this process of incorporating additives and fillers, a wide range of products can be achieved in flame, wear resistance or conductivity.


The increasing demands of plastic products especially PVC (polyvinyl chloride) have given rise to this wonderful recycling technique. According to the market demands custom compounding can be done. If you are looking for compounding services, there are several companies that can help you out. Recycling waste plastic through this procedure can be eventually helpful for creating a safe environment.


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