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Choosing the right purging agent

17 September 2020

Choosing the right purging agent

Improve product quality and reduce downtime and scrap rate with the new smart purging agents

Efficient cleaning of thermoplastic processing machinery for leftover resin and other contaminants that build up on the interior is important to ensure a good product quality and to reduce downtime and scrap rate, this way saving money and raw materials.

 

Ramclean®, a new generation of products, is a line of chemical purges and mechanical purges that allows you to run an effective production:

 

Chemical purges use foaming agent to get the purging process as efficient as possible as well as cleaning negative flow areas. The foaming agents are used to enhance the purge as well as to clean hard-to-reach/negative flow areas. Soaking (stopping the screw) is needed and popping noises will accrue as a part of normal purging protocol.

 

Mechanical purges rely on shear force and viscosity along with additives and fillers to clean the machinery. When using mechanical purges no soaking is required (keeping it still in the barrel) and it does not create popping sounds as part of the process.

 

  • Non-corrosive
  • Non-abrasive
  • Non-toxic
  • Purges almost any thermoplastic material
  • Compatible with almost any processing technology

 

 

Contact us for more information about Ramclean® purging agents and to order a sample.

 


 

Grade selection guide

In order to select the purging agent best fitted to your production, parameters such as temperature, specialty, processing technology, resin to be cleaned need to be taken into consideration. This guide will help you pick the purge agent that matches your needs.

 

  CHEMICAL PURGE     
Product 101 204 301 500 600
Temperatures 150-250°C 150-250°C 160-230°C 160-230°C 120-280°C
Specialty General purpose General purpose General purpose PVC / ABS Blown film, PVC
Works best on PP, PE, PA, ABS, PC, ASA, EVOH, POM, Copolymer PP, PE, PA, ABS, PC, ASA, EVOH, POM, Copolymer PP, PE, PA, ABS, PC, ASA, EVOH, POM, Homopolymer PVC / ABS PE, PP, PVC
Foaming % Medium High Medium Medium High
Hot runner compatible Yes Yes Yes Yes Yes
Injection molding Excellent Excellent Excellent Good Good
Extrusion Excellent Excellent Excellent Good Good
Blown film Good     Good Excellent
Food contact approval Yes Yes Yes Yes Yes

 

  MECHANICAL PURGE     
Product 206 800 801 901
Temperatures 230-320°C 230-310°C 230-400°C 180-240°C
Specialty Transparent PC General purpose Very high temps Transparent PMM
Works best on PC, Acrylics PP, PE, PA, ABS, PC, ASA, EVOH, PET POM, Copolymer PP, PE, PA, ABS, PC, Stryrenic polymers, PEI, PEEK PMMA
Foaming % None None None None
Hot runner compatible Yes Yes No No
Injection molding Excellent Excellent Excellent Excellent
Extrusion Excellent Excellent Excellent Excellent
Blown film        
Food contact approval No Yes Yes Yes

 



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