Frequently Asked Questions

The amount of Ultra Purge needed is the capacity of one press barrel. To achieve one barrel capacity, load Ultra Purge into the machine until you see it being ejected from the machine.
No, Ultra Purge does not leave behind any residue because it does not stick to any kind of metal surface.
All grades of Ultra Purge are designed to clean hot runners. Since Ultra Purge works on a chemical reaction, there are no particles that can clog the hot runners system. Also, Ultra Purge has chemical and physical characteristics which are very close to thermoplastic resins, thus, in many cases, it can also be molded. We have two different procedures for purging hot runners, with mold open and with mold closed.
Ultra Purge is effective at purging all thermoplastic resins in injection molding, extrusion, blown film and blow molding applications.
Yes, Ultra Purge is efficient at removing carbon build up from the screw and hot runners. When the carbon deposit is excessive, we recommend manually cleaning the screw and then using the Ultra Purge in a preventative maintenance fashion to prevent the formation of carbon.
All grades of Ultra Purge have a corresponding concentrated (Pure) grade. Please note that concentrated (Pure) grades must be mixed with the recommended carrier.
The scrap generated when purging with Ultra Purge can be handled in two ways: 1. It can be sold to scrap dealers. We will help you identify with what resin it should be mixed with. 2. Depending on the Ultra Purge grade and type of product you are molding, Ultra Purge can be reused to make parts.
Yes. Ultra Purge is food contact certified according to the FDA and European food regulation. Also, all ingredients used in Ultra Purge are GRAS (Generally Recognized as Safe) as substances added indirectly to human food.
The Ultra Purge product line is based on plastic resin “family” type, as well as working temperature and type of machine. Please consult our product line table to better select your Ultra Purge grade and feel free to contact us for online support and assistance.
All grades of Ultra Purge are moldable and can be safely injected in the mold without damaging the polish or finish of the mold. It is possible with certain applications that by molding Ultra Purge, you will obtain a short shot. This is due to the fact that the Melt Index of Ultra Purge may be slightly different from the resin that you were molding previously. If molding a short shot is a problem please call our technical support. It is possible to customize the Ultra Purge grade that you need based on your application.
Ultra Purge BP is the recommended grade to clean hot runners in stack mold application with no valve gated hot runners. Ultra Purge BP is a concentrated (Pure) grade that needs to be mixed with your current production resin. Ultra Purge BP will not alter the melt index of your resin and it is 100% moldable.
No. In the past chemical purging compounds were associated with noxious odors. Ultra Purge’s revolutionary technology allows it to achieve a thorough cleaning, typically associated with chemical purging compounds, without releasing any annoying fumes/odors. Ultra Purge can be safely used in clean and white rooms.
Ultra Purge is a chemical purging compound and in order to complete its reaction it needs a 3 to 5 minute soak time. Ultra Purge is a very stable material and if needed, it can stay inside the machine for several hours without degrading. Allowing Ultra Purge to soak more than 5 minutes will not enhance its performance.
We recommend reducing the shot size to 10% of the maximum allowed shot size while purging with Ultra Purge. This guarantees a more thorough cleaning of the check ring valve.
Both procedures can be used to clean the hot runners and there isn’t really one procedure that is better than the other one. This really depends on your application. Please consult with our qualified technical staff.
It is very difficult to state a time in which Ultra Purge can clean a machine because this depends on the machine type, mechanical condition, type of resin needing to be cleaned, etc.
According to our studies and many of our customers, using Ultra Purge will help you reduce the downtime between 40 to 80% and reduce the scrap from 50 to 85%.
Ultra Purge is extremely easy to use. We always recommend our customers to follow our purging procedures accordingly in order to obtain the best results.
Ultra Purge is a chemical purging compound in pellet form. Ultra Purge looks like a “salt and Pepper” blend with the active part and the carrier. This formulation allows Ultra Purge to be very efficient in the cleaning process especially in the feeding zone of the screw since the active parts melts at a temperate greater that 80°C (176°F). As soon as Ultra Purge is introduced in the machine, it will start reacting without waiting for the resin normally used as a carrier to melt like with most other purging compounds.
No, Ultra Purge works on a 100% chemical reaction and no abrasive particles are present inside Ultra Purge.
Ultra-X is a proprietary technology added to Ultra Purge that enhances the performance thus making it more efficient and user friendly.
Ultra-X fluidizes the polymer which allows Ultra Purge's grades to flow through very small gates (as little as 0.2 mm) and at the same time, it adds scrubbing power without harming the screw, barrel, hot runners, or the metal finish of the mold. Ultra-X allows Ultra Purge to reach an optimal level of expansion that is necessary to reach the hard to clean areas of the machine.
From internal studies and controlled tests performed with select customers, the new Ultra-X technology has shown an increase cleaning power of about 30% compared to previous grades of Ultra Purge designed for the same application. Ultra-X technology is applied to Ultra Purge grades designed to clean crystalline and amorphous plastic resin. In addition to color changes, the new Ultra-X technology has shown a great improvement with the removal of carbon deposits.
At the present time, we have introduced the Ultra-X technology to two Ultra Purge grades, Ultra Purge 5150 and Ultra Purge 5160. Ultra Purge 5150 is designed to purge crystalline resins while the Ultra Purge 5160 is designed to purge amorphous resin. We plan to add the new Ultra-X technology to other Ultra Purge grades in the near future.
The Ultra Purge 5150 and Ultra Purge 5160 can be used to purge hot runner systems with open mold or by molding parts without making any major changes to the process parameters.