--- title: Try These 5 Tricks For Minimizing Purging Compound Residue description: Discover five tricks for minimizing purging compound residue that will help you keep your production runs on track and reduce machine downtime. image: https://www.asaclean.com/hubfs/minimizing-purging-compound-residue.jpg.jpg --- [ Order Online ](https://asaclean.my.site.com/b2bstore) [ Free Sample ](https://offers.asaclean.com/free-sample) ## [ Asaclean Blog ](https://www.asaclean.com/blog) Browse by Topic " aerospace asaclean asaclean news Asaclean® benefits asahi kasei automotive Best Practices black specks blisters blow molding blown-film extrusion buyers caps and closures carbon contamination cast-film extrusion Chemical Purging Compounds clear applications Color Changeovers Company News compounding consumer products contamination Cost savings custom molders Customer Success Story decreasing scrap defects electronics Energy Efficiency EX Grade extruder cleaning Extrusion fillament glass filled Glitter Grade Selection HDPE High and Low Temp Changeovers hold a bubble Hot Runners Injection Molding Injection Molding Tips LDPE Lightweight automotive components LLDPE low residue maintenance Material Changeovers Mechanical Purging Compounds medical Melt Flow Index NPE 24 nylons on the fly packaging PCR PEEK Polypropylene Post Consumer Resins preventative preventative purging processing tips profile extrusion Purge Program purge programs Purge Training Purge Trial purging purging compounds purging concentrates purging procedures Purging Tips quality recycled resins residue issues scrap reduction Screw Pulls sheet extrusion shutdown and sealing start-up super engineering resins Sustainability Tech Day technical support training trials Troubleshooting Twin Screw twin screw extrusion two step purging U Grade ULTEM venting Viscosity webinars wire extrusion - 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[LinkedIn Share ](https://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fwww.asaclean.com%2Fblog%2Ftry-these-5-tricks-for-minimizing-purging-compound-residue&title=Try%20These%205%20Tricks%20For%20Minimizing%20Purging%20Compound%20Residue&summary=Discover+five+tricks+for+minimizing+purging+compound+residue+that+will+help+you+keep+your+production+runs+on+track+and+reduce+machine+downtime.&source=) - [Pinterest Pin ](https://pinterest.com/pin/create/button/?url=https%3A%2F%2Fwww.asaclean.com%2Fblog%2Ftry-these-5-tricks-for-minimizing-purging-compound-residue) - [Email Email ](mailto:?subject=Try%20These%205%20Tricks%20For%20Minimizing%20Purging%20Compound%20Residue&body=https%3A%2F%2Fwww.asaclean.com%2Fblog%2Ftry-these-5-tricks-for-minimizing-purging-compound-residue) ![Try These 5 Tricks For Minimizing Purging Compound Residue](https://www.asaclean.com/hs-fs/hubfs/minimizing-purging-compound-residue.jpg.jpg?width=640&height=500&name=minimizing-purging-compound-residue.jpg.jpg) ![Five tricks for minimizing purging compound residue.](https://www.asaclean.com/hs-fs/hubfs/minimizing-purging-compound-residue.jpg.jpg?width=307&name=minimizing-purging-compound-residue.jpg.jpg "Five tricks for minimizing purging compound residue.")Contamination and purging compound residue are costly to your plastics processing company – both in the amount of product that cannot be sold and in the resulting production downtime that occurs. It’s critical to find a purging compound that allows you to transition from one color to another quickly and efficiently so your production runs stay on schedule. Contamination, scrap rates and production downtime are controlled or even eliminated when paired with the proper purging procedures. The following are five simple tricks for minimizing purging compound residue in your facility’s machines: ### 1. Use A Compatible Grade Always use a purging compound grade that is compatible with the processing resin being molded. This ensures less residue is left behind in your machines. The melt index of your resin is a major factor in residue issues, especially if the purge is much stiffer than the next resin. Melt index is the first characteristic to consider when selecting a purging compound that will effectively purge resins and contamination. If you’re using hot runners, [check with your purging compound supplier](https://asaclean.com/about-us/contact-us-or-request-a-sample/) for the right grade to use. Also, ask your supplier about proper procedures for hot runner cleaning, as the method is different from purging other machine parts. ### 2. Use A Grade Formulated For Lower Residue If you’re experiencing issues with residue in your machines, [use a grade](https://asaclean.com/purging-products/e-grade-purging-compound/) designed for residue-sensitive or low-temperature resins. These grades are formulated for lower residue and can be used in conjunction with other grades, as a chaser, whenever you’re trying to reduce purging compound residue. ### 3. Use High Screw Speed And Back Pressure If you’re experiencing issues with residue when changing production resins, low-to-medium back pressure and screw speeds are often to blame. Certain resins – such as Bayer’s Texin, Desmopan (TPU) and Makrolon (PC) – require some level of assertiveness in the form of high screw speed and backpressure. Please note this may not apply to shear or heat sensitive resins. ### 4. Perform High-Velocity ‘Air Shots’ The check ring and nozzle are areas where purge or resin often hang up, leading to residue issues. After completing general purging procedures for cleaning the screw and barrel, it’s recommended to charge the machine with a small quantity of purging compound and perform short, high-velocity injection air shots (not into the mold). The action of short, high-velocity shots blasts the purging compound into tight areas and dead spots the material wouldn’t reach otherwise. ### 5. Move From Light To Dark Colors When setting up your production schedule, move from clear to light to dark colors whenever possible. Darker color resins leave more visible residue than lighter colors, so moving from light to dark helps hide the effects of purge residue and residual color, and decreases the total time spent purging. Excessive downtime negatively impacts your business’s bottom line and your ability to meet or exceed business projections. By following the tips above – and implementing the right purging procedures – you can effectively minimize purging compound residue and contamination so your production runs stay on track. **Learn more about improving your profitability with proper purging procedures.** [![](https://no-cache.hubspot.com/cta/default/468726/interactive-161630774182.png) ](https://www.asaclean.com/hs/cta/wi/redirect?encryptedPayload=AVxigLJd79OEkHzSaYgvvHjjbqO781YrDy6rXzZTwMeJWqwLCMPuwrvP9tgcNh%2B5NMyM5F69YPjkgFFWPvwdkhfTB0J3w0KsHV4m2Gp2uNm0tkNEHK1EvaKjIPqHVGxkjMr3zEsePoua9gVr%2B%2BxxTJFbsJRgxJdU4HoSfuTf9TrFQnWCsZoVvM1obMjPUjJ2ak12xRZ9M8rcRNmivlfqMZlv58x8oFsL%2B%2BlVZxMFNk%2FuekDqVzBLskd02rkp&webInteractiveContentId=161630774182&portalId=468726) ![Tom Hanvey](https://www.asaclean.com/hs-fs/hubfs/Tom%20Headshot.jpg?width=150&name=Tom%20Headshot.jpg) #### [ Tom Hanvey ](https://www.asaclean.com/blog/author/tom-hanvey) Tom Hanvey is the Associate Director of Marketing & Sustainability at Asahi Kasei Plastics North America. Before joining APNA, he worked as the Senior Marketing Manager for Asaclean Purging Compounds. He's worked in the plastics industry for over 10 years and focuses on recyclable resins and on the inbound marketing side, providing easy-to-digest content to processors looking for an edge on their competition. - [Share On LinkedIn ](https://www.linkedin.com/in/thomashanvey/) ## Related Posts [![](https://www.asaclean.com/hs-fs/hubfs/switching-purging-compounds.jpg?width=450&height=250&name=switching-purging-compounds.jpg) 3 Reasons Purge Training Should Be A Part of Your Processor Training Injection... / 4 min read / February 09, 2021 ](https://www.asaclean.com/blog/3-reasons-purge-training-should-be-a-part-of-your-processor-training) [![](https://www.asaclean.com/hs-fs/hubfs/switching-purging-compounds.jpg?width=450&height=250&name=switching-purging-compounds.jpg) Why In-Person or Remote Purge Training Should Be A Part Of Extrusion And Injection Molding Training Injection... / 4 min read / August 05, 2021 ](https://www.asaclean.com/blog/why-in-person-or-remote-purge-training-should-be-a-part-of-extrusion-and-injection-molding-training) ## Comments Get Started ## Ready to start improving your efficiency and increasing your profitability? - [Request a Consultation](https://www.asaclean.com/blog/try-these-5-tricks-for-minimizing-purging-compound-residue#) - [Contact Sales](https://www.asaclean.com/blog/try-these-5-tricks-for-minimizing-purging-compound-residue#) ![](https://www.asaclean.com/hubfs/assets/images/icons/icon-layers.svg) #### Free Sample Request a free sample of Asaclean® Purging Compounds for your plant and start saving today. [Request your free sample](https://offers.asaclean.com/en/free-sample?hsLang=en) ![](https://www.asaclean.com/hubfs/assets/images/icons/icon-calculator.svg) #### Cost Savings Calculator Use our free calculator to see how much you could be saving with Asaclean® Purging Compounds. [See your savings](https://www.asaclean.com/cost-savings-calculator) [ Back to Top ](https://www.asaclean.com/blog/try-these-5-tricks-for-minimizing-purging-compound-residue#top) ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Tom Hanvey", "url" : "https://www.asaclean.com/blog/author/tom-hanvey" }, "dateModified" : "2022-02-15T12:10:24.241Z", "datePublished" : "2017-01-03T13:00:00.000Z", "headline" : "Try These 5 Tricks For Minimizing Purging Compound Residue", "image" : [ "https://www.asaclean.com/hubfs/minimizing-purging-compound-residue.jpg.jpg" ], "mainEntityOfPage" : { "@id" : "https://www.asaclean.com/blog/try-these-5-tricks-for-minimizing-purging-compound-residue", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://www.asaclean.com/hubfs/Asaclean%20Logo%20TM.jpg" }, "name" : "Asahi Kasei Plastics North America" } } ``` ```json { "@context" : "http://schema.org", "@type" : "Article", "articleBody" : "Contamination and purging compound residue are costly to your plastics processing company – both in the amount of product that cannot be sold and in the resulting production downtime that occurs. It’s critical to find a purging compound that allows you to transition from one color to another quickly and efficiently so your production runs stay on schedule. Contamination, scrap rates and production downtime are controlled or even eliminated when paired with the proper purging procedures. The following are five simple tricks for minimizing purging compound residue in your facility’s machines:", "author" : { "@type" : "Person", "name" : "Tom Hanvey" }, "datePublished" : "January 03, 2017", "headline" : "Try These 5 Tricks For Minimizing Purging Compound Residue", "image" : "https://f.hubspotusercontent20.net/hubfs/468726/minimizing-purging-compound-residue.jpg.jpg", "name" : "Try These 5 Tricks For Minimizing Purging Compound Residue", "url" : "https://www.asaclean.com/blog/try-these-5-tricks-for-minimizing-purging-compound-residue" } ```