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PURGEX – maximum purity!  #7 (65) 2008

Specialists of American company Neutrex have created a unique means for cleaning operating units of equipment and hot-runner gates from plastics residuals and carbon deposit

If you have any problems with cleaning your equipment, Neutrex Company is ready to solve them: purging compounds PURGEX provide efficient and economical cleaning of equipment and hot-runner gates.
Business card
Chemical Technologies Ltd. supplies a wide range of products for plastics manufacturers and processors.
anti-oxidants, including high-temperature ones, for PVC; UV-stabilizers and UV-absorbers, acid neutralizers; masterbatches with stabilizers, lubricants, nucleators; masterbatches for wastes recycling from Songwon International AG;
a wide range of engineering plastics (PA-6, PP, PBT, POM, PPS and other);
polystyrene and polyether thermoplastic elastomers;
purging compounds PURGEX from Neutrex Company (the USA);
nanochalk with surface treatment by reactive compounds for cost reduction of shock resistant PVC composites;
EPDM rubber, chloroprene rubber;
Cristal titanium dioxide from The National Titanium Dioxide Company;
fire retardants from ICL Industrial Products (Israel).
Cost saving on one equipment purging procedure with the use of PURGEX compounds amounts to 20-30 dollars in comparison with cleaning with similar compounds from other producers, and compared to traditional purging method – polymer put-through – it comes to 7-1000 dollars (cost saving is calculated considering the costs of materials, purging compounds, amount of products defected by low-grade purging of equipment, machine idle time).
Purging compounds PURGEX efficiently clean:
 - heating chambers and screws in injection molding machines, extruders, twin-screw compounders;
 - hot-runner gates with diameter up to 0,7 mm in molds.
Purging compounds PURGEX ensure:
fast and cost-efficient material or color changes;
removing carbon deposit from barrels, screws, hot-runner gates;
preventing defects formation in products in the form of dark contaminations, irregularly spread over the whole volume – a result of excessive formation of carbon deposit;
extending operation life of expensive barrels, screws, runner gates, molds, mold dies.
Purging compounds PURGEX show excellent results when processing:
polymer materials of general purpose (HDPE, LDPE, PP, PS, ABS, SAN);
polymer materials for engineering and technical purposes (PA, PC, POM, PBT, PPS, PET);
intractable polymers – thermoplastic elastomers (styrene-butadiene-styrene (SBS), EVA copolymer, styrene-ethylene-butylene-styrene copolymer (SEBS), polyolefin-based thermoplastic elastomers, dynamically vulcanized thermoplastic elastomers);
non-thermostable polymers – PVC (neutralizes hydrochloric acid gases), PU, ABS;
fire-resistant, glass-filled and mineral-filled composites;
foam polymers;
transparent polymers (PURGEX is easily removed from equipment and does not leave stains on transparent polymers).
Efficiency of purging procedures with PURGEX compounds is provided by perfect selection of components:
PURGEX concentrates include chemical active agents for deep cleaning from the previous polymer, color, carbon deposit;
Polymer carrier of PURGEX is well compatible with the polymer being purged, which ensures thorough cleaning of barrels, screws and hot-runner gates, including hard-to-reach places, “dead corners”. For better compatibility of PURGEX with polymers, some of its brands are supplied with binding agents with reactive groups;
Polymer carrier PURGEX has relatively high density able to create a high pressure within a barrel, which contributes to better cleaning performance;
Some PURGEX brands include fiber glass (3%) for cleaning heavy contamination. Specially processed fiber glass prevents wear and tear on hot-runner gates, barrels and screws.
Non-toxic PURGEX compounds are allowed by FDA system for use with food and medical products.

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