--- title: "8 Key Tips: Purging Compounds for PP & Nylon in Automotive Molding" description: 8 essential tips to optimize automotive injection molding using Asaclean purging compounds with Polypropylene and Nylon resins. Boost efficiency now! image: https://www.asaclean.com/hubfs/Automotive%20Nylon%20Blog%20Header.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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[Twin Screw](https://www.asaclean.com/blog/topic/twin-screw) - [twin screw extrusion](https://www.asaclean.com/blog/topic/twin-screw-extrusion) - [two step purging](https://www.asaclean.com/blog/topic/two-step-purging) - [U Grade](https://www.asaclean.com/blog/topic/u-grade) - [ULTEM](https://www.asaclean.com/blog/topic/ultem) - [venting](https://www.asaclean.com/blog/topic/venting) - [Viscosity](https://www.asaclean.com/blog/topic/viscosity) - [webinars](https://www.asaclean.com/blog/topic/webinars) - [wire extrusion](https://www.asaclean.com/blog/topic/wire-extrusion) [ Subscribe ](https://www.asaclean.com/blog/8-key-tips-purging-compounds-for-pp-nylon-in-automotive-molding#subscribe-modal) ### Suscribirse Injection Molding / 6 min read / April 25, 2023 # 8 Key Tips: Purging Compounds for PP & Nylon in Automotive Molding - [Facebook Share ](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Fwww.asaclean.com%2Fblog%2F8-key-tips-purging-compounds-for-pp-nylon-in-automotive-molding) - [Twitter Tweet ](https://twitter.com/intent/tweet?url=https%3A%2F%2Fwww.asaclean.com%2Fblog%2F8-key-tips-purging-compounds-for-pp-nylon-in-automotive-molding&text=8+Key+Tips%3A+Purging+Compounds+for+PP+%26amp%3B+Nylon+in+Automotive+Molding) - [LinkedIn Share ](https://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fwww.asaclean.com%2Fblog%2F8-key-tips-purging-compounds-for-pp-nylon-in-automotive-molding&title=8%20Key%20Tips%3A%20Purging%20Compounds%20for%20PP%20%26amp%3B%20Nylon%20in%20Automotive%20Molding&summary=8+essential+tips+to+optimize+automotive+injection+molding+using+Asaclean+purging+compounds+with+Polypropylene+and+Nylon+resins.+Boost+efficiency+now%21&source=) - [Pinterest Pin ](https://pinterest.com/pin/create/button/?url=https%3A%2F%2Fwww.asaclean.com%2Fblog%2F8-key-tips-purging-compounds-for-pp-nylon-in-automotive-molding) - [Email Email ](mailto:?subject=8%20Key%20Tips%3A%20Purging%20Compounds%20for%20PP%20%26amp%3B%20Nylon%20in%20Automotive%20Molding&body=https%3A%2F%2Fwww.asaclean.com%2Fblog%2F8-key-tips-purging-compounds-for-pp-nylon-in-automotive-molding) ![8 Key Tips: Purging Compounds for PP & Nylon in Automotive Molding](https://www.asaclean.com/hs-fs/hubfs/Automotive%20Nylon%20Blog%20Header.jpg?width=640&height=500&name=Automotive%20Nylon%20Blog%20Header.jpg) The automotive industry demands high-quality components, and efficient injection molding is essential for meeting these expectations. Process engineers face numerous challenges when working with materials such as [Polypropylene](https://www.akplastics.com/products/thermylene/) (PP) and [Nylon](https://www.akplastics.com/products/leona/), including [color changes](https://www.asaclean.com/solutions/color-changeovers), material degradation, and extended downtime periods. Asaclean Purging Compounds solve these challenges, ensuring a more efficient and effective process for automotive manufacturers. In this blog post, we'll share five essential tips on using purging compounds in automotive [injection molding](https://www.asaclean.com/process/injection-molding) to help you achieve optimum results. #### 1. Select the Right Grade of Purging Compound Asaclean offers various purging compounds designed specifically for different resins and applications. We recommend using our [mechanical grades](https://www.asaclean.com/purging-products/mechanical-purging-compounds) optimized for cleaning and excellent color change performance for automotive process engineers working with PP and Nylon resins. The compatibility of the purging compound with your resins is crucial for efficient and effective cleaning. #### 2.  Optimize Temperature Settings Optimizing your temperature settings for your resins and purging compounds is essential to achieve the best purging results. For PP and Nylon resins, set the barrel and nozzle temperature to the upper end of the processing range for your material. This will facilitate smooth purging and prevent [material degradation](https://www.asaclean.com/solutions/carbon-contamination). #### 3. Utilize a Short Shot Method for Faster Changeovers The short-shot method can significantly reduce downtime when transitioning between materials or colors. Begin by purging with Asaclean at the recommended temperature settings. Once the purging compound has displaced the previous resin, stop before the mold fills completely. This lets you quickly switch to the new resin, minimizing waste and accelerating change over time. #### 4. Regularly Monitor and Adjust Your Process Like any manufacturing process, it's essential to continuously monitor and adjust your injection molding procedures to optimize efficiency and maintain product quality. Monitor your machine parameters, such as injection pressure, screw speed, and back pressure, to ensure you achieve the best results. Regularly reviewing and adjusting these settings will help maximize Asaclean Purging Compounds in your [automotive](https://www.asaclean.com/en/industry/automotive) injection molding processes. #### 5. Prioritize Material Traceability and Compliance The automotive industry has stringent regulations and requires high-quality components that adhere to safety standards. Ensure that your purging compounds meet industry specifications and have proper documentation, including [material safety data sheets ](https://www.asaclean.com/resources/grade-documentation)(MSDS) and [quality certifications](https://www.asaclean.com/resources). Asaclean's products are designed with compliance in mind, helping you maintain the traceability and transparency required by automotive manufacturers. #### 6.  Optimize Temperature Settings Optimizing your temperature settings for your resins and purging compounds is essential to achieve the best purging results. For PP and Nylon resins, set the barrel and nozzle temperature to the upper end of the processing range for your material. This will facilitate smooth purging and prevent material degradation. #### 7. Leverage Purging Compounds for Hot Runner Systems Hot runner systems are standard in automotive injection molding due to their efficiency and ability to produce high-quality components with minimal waste. However, these systems can be challenging to clean and maintain. Asaclean designed purging compounds to work seamlessly with hot runner systems, ensuring that residue is effectively removed and preventing downtime due to clogs or contamination. Pay close attention to your hot runner system's temperature settings and flow rates during purging to achieve the best results. #### 8. Optimize Purging for Multi-Cavity Molds Automotive injection molding often involves using multi-cavity molds to produce complex, high-precision parts. In these cases, it's crucial to ensure that the purging compound reaches all areas of the mold to eliminate contamination effectively. Use a purging compound with excellent flow properties, like Asaclean's [NCR Grade](https://www.asaclean.com/purging-products/ncr-grade) or [PLUS Grade](https://www.asaclean.com/purging-products/plus-grade), and adjust injection pressure and mold temperature to ensure thorough purging. A soak time of 5-10 minutes is generally sufficient, but the exact duration may vary depending on the specific application and material. With chemical or concentrate grades, a short soak will activate the cleaning power and ensure you clean out low-flow areas in the mold. The correct purging technique will help maintain the quality of your automotive parts and reduce downtime between production runs. #### Conclusion By incorporating these three additional tips, automotive process engineers can further optimize their injection molding processes and maximize the benefits of using Asaclean Purging Compounds. Prioritizing material traceability and compliance, optimizing purging for multi-cavity molds, and leveraging purging compounds for hot runner systems will help you maintain the high standards required by the automotive industry, reduce downtime, and produce top-quality components. Asaclean Purging Compounds are invaluable for automotive process engineers working with Polypropylene and Nylon resins in injection molding. By following these five tips, you can minimize downtime, reduce material waste, and maintain the high-quality components demanded by the automotive industry. Remember to select the correct grade of purging compounds, optimize temperature settings, use the short-shot method, implement proper (short) soaking techniques, and regularly monitor and adjust your process to achieve the best results. **[Ready to save time and money with Asaclean? ](https://offers.asaclean.com/free-purge-consultation)****[ Don't wait!](https://offers.asaclean.com/free-purge-consultation)** **[ Claim your FREE 10-minute consultation with our Purging Experts now and unlock the benefits. Schedule your consultation here!](https://offers.asaclean.com/free-purge-consultation)** ![Yoko Tanaka](https://www.asaclean.com/hs-fs/hubfs/Yoko%20Tanaka%20Headshot%203-25-16.jpg?width=150&name=Yoko%20Tanaka%20Headshot%203-25-16.jpg) #### [ Yoko Tanaka ](https://www.asaclean.com/blog/author/yoko-tanaka) Yoko Tanaka is the Marketing Manager at Asaclean. She has been helping molders and extruders learn about Asaclean purging and how to improve their processes for the past eight years. - [Share On LinkedIn ](https://www.linkedin.com/in/yokotanaka/) ## Related Posts [![Minimize Scrap & Boost Efficiency with PEEK & Ultem: Asaclean's Solution](https://www.asaclean.com/hs-fs/hubfs/Super%20Blog%20Header.jpg?width=450&height=250&name=Super%20Blog%20Header.jpg) Minimize Scrap, Boost Efficiency with PEEK & Ultem:Asaclean's Solution SCRAP REDUCTION / 4 min read / March 27, 2023 ](https://www.asaclean.com/blog/minimize-scrap-boost-efficiency-with-peek-ultem-asacleans-solution) [![Understanding Melt Flow Rate (MFR) in Plastic Processing](https://www.asaclean.com/hs-fs/hubfs/Training%20Blog%20Header.jpg?width=450&height=250&name=Training%20Blog%20Header.jpg) Understanding Melt Flow Rate (MFR) in Plastic Processing Injection... / 4 min read / December 12, 2023 ](https://www.asaclean.com/blog/understanding-melt-flow-rate-in-plastic-processing) ## Comments Get Started ## Ready to start improving your efficiency and increasing your profitability? - [Request a Consultation](https://www.asaclean.com/blog/8-key-tips-purging-compounds-for-pp-nylon-in-automotive-molding#) - [Contact Sales](https://www.asaclean.com/blog/8-key-tips-purging-compounds-for-pp-nylon-in-automotive-molding#) ![](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/8-key-tips-purging-compounds-for-pp-nylon-in-automotive-molding#top) ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Yoko Tanaka", "url" : "https://www.asaclean.com/blog/author/yoko-tanaka" }, "dateModified" : "2023-05-17T23:49:34.621Z", "datePublished" : "2023-04-25T23:54:56.000Z", "headline" : "8 Key Tips: Purging Compounds for PP & Nylon in Automotive Molding", "image" : [ "https://www.asaclean.com/hubfs/Automotive%20Nylon%20Blog%20Header.jpg" ], "mainEntityOfPage" : { "@id" : "https://www.asaclean.com/blog/8-key-tips-purging-compounds-for-pp-nylon-in-automotive-molding", "@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" : "The automotive industry demands high-quality components, and efficient injection molding is essential for meeting these expectations. Process engineers face numerous challenges when working with materials such as Polypropylene (PP) and Nylon, including color changes, material degradation, and extended downtime periods. Asaclean Purging Compounds solve these challenges, ensuring a more efficient and effective process for automotive manufacturers. In this blog post, we'll share five essential tips on using purging compounds in automotive injection molding to help you achieve optimum results.", "author" : { "@type" : "Person", "name" : "Yoko Tanaka" }, "datePublished" : "April 25, 2023", "headline" : "8 Key Tips: Purging Compounds for PP & Nylon in Automotive Molding", "image" : "https://468726.fs1.hubspotusercontent-na1.net/hubfs/468726/Automotive%20Nylon%20Blog%20Header.jpg", "name" : "8 Key Tips: Purging Compounds for PP & Nylon in Automotive Molding", "url" : "https://www.asaclean.com/blog/8-key-tips-purging-compounds-for-pp-nylon-in-automotive-molding" } ```