Compounding

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Plastic compounding is the process of combining two or more polymer materials, as well as additives and fillers, to create a new plastic material with specific properties. This process is usually carried out using specialised equipment such as extruders, mixers or kneaders.

The aim of plastic compounding is to make a material with specific performance characteristics, such as improved strength, increased flexibility or improved resistance to heat, UV radiation or chemicals. Additives commonly used in plastic compounding are fillers, stabilisers, colourants and flame retardants.

In the compounding process, polymer granules or powders are fed into the extruder or mixer, where they are melted and mixed. Additives and fillers can be added at different stages of the process, depending on the desired properties of the final product.

Compounding plastics is an important part of the plastics industry, as it enables the creation of customised materials that meet specific performance requirements. These materials are used in a wide range of applications, including automotive, construction, packaging and medical devices.

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Types of compounding at Plastima

In some extrusions, such as compounding, precision is not required because the bulk density remains constant. Plastic compounding is the process of taking basic, raw plastic material and modifying it with various additives to meet colour, property and performance requirements. Lab formulation and physical processes achieve this by combing the necessary additives and colour to the plastic resin. While most would think that compounding plastics starts with a polymer or base resin, we at Plastima believe that raw material testing is the start of our successful process in the first place.Plastima_Leistritz_Machinery_Logo.webarchive

Production compounders

Leistritz Extrusion Technology has been active in extrusion since 1937, specialising in the development and production of co-rotating twin-screw extruders. Typical fields of application are masterbatching, compounding and blending of various types of polymers and additives and/or pigments.

Our team is at your disposal by assisting in the development of a complete production line. We are happy to help you with questions about compounding and about Leistritz Extrusion Technology.

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Smaller-scale compounders also exist. These are ideal for smaller production processes. At impact, Plastima is capable of small-scale compounding as well. Compounding on a small scale is done using our premium blenders. Compounding on a large scale is done using our premium compounders with twin screws and side feed. Compounding plastics is the process of taking basic, raw plastic material and modifying it with various additives to meet colour, property and performance requirements. Lab formulation and physical processes achieve this by combing the necessary additives and colour into the plastic resin. 

Plastima_Collin_Machinery_Logo.webarchiveLab compounders

Collin has been the benchmark in equipment for laboratories and pilot environments since its foundation. By focusing on utmost quality and durability, Collin offers the best solutions for plastics development. 

Since 1972, Plastima has successfully cooperated with the renowned company Collin Lab & Pilot Solutions. The Bayerische machine manufacturer COLLIN specialises in developing equipment for plastics development and focuses on systems for laboratories and pilot environments. COLLIN is known for its very high-quality, modular systems that guarantee the best quality, precision and utmost reproducibility and traceability.

For compounding at lab and pilot scale, Collin offers a wide range of flush double-screw extruders for the lower throughput range, from 200 g to about 80 kg per hour. 

For compound mixing, the manufacturer provides complete solutions with the ability to dose multiple components including granules, powders, fibres and liquids. As follow-up equipment, head granulation or strand granulation can be used. Direct extrusion can also be used to directly produce a film or the compounder can be used in a tandem setup to minimise degradation of molecular chains.

Contact us about compounding