--- title: Stable injection molding even in high humidity by using dehumidifying dryer description: Manufacturing in areas with high humidity will result in product appearance defects due to insufficient drying of materials. To reduce appearance defects, Dehumidifying dryer is needed. image: https://eng.injection-molding.jp/hubfs/english/Blog/dehumidifying%20dryer/Stable%20injection%20molding%20even%20in%20high%20humidity%20by%20using%20dehumidifying%20dryer/Blog%EF%BC%9AStable%20injection%20molding%20even%20in%20high%20humidity%20by%20using%20dehumidifying%20dryer%20(1).png --- - [Gran cutter (Improving the recycling rate)](https://eng.injection-molding.jp/blog/cat/gran-cutter) - [Total link (Overall improvement in Injection molding line）](https://eng.injection-molding.jp/blog/cat/total-link) - [Box filling system (Operate for 24 hours and reduce manpower)](https://eng.injection-molding.jp/blog/cat/box-filling-system) - [EXZⅡ (Reduce mold changing time and take-out time)](https://eng.injection-molding.jp/blog/cat/exz) - [Dehumidifying dryer (Quality stabilization)](https://eng.injection-molding.jp/blog/cat/dehumidifying-dryer) [![Home](https://eng.injection-molding.jp/hubfs/ico_home@2x.png)](https://eng.injection-molding.jp/)![](https://eng.injection-molding.jp/hubfs/ico_arrow_right_white@2x.png)[Blog for productivity improvement](https://eng.injection-molding.jp/blog)![](https://eng.injection-molding.jp/hubfs/ico_arrow_right_white@2x.png)Stable injection molding even in high humidity by using dehumidifying dryer ![Stable injection molding even in high humidity by using dehumidifying dryer](https://eng.injection-molding.jp/hubfs/english/Blog/dehumidifying%20dryer/Stable%20injection%20molding%20even%20in%20high%20humidity%20by%20using%20dehumidifying%20dryer/Blog%EF%BC%9AStable%20injection%20molding%20even%20in%20high%20humidity%20by%20using%20dehumidifying%20dryer%20(1).png) Manufacturing in areas with high humidity will result in product appearance defects due to insufficient drying of materials like below, - Appearance defects of low gloss and white spots with transparent products - Contamination; an indirect cause of Black streaks is mixed - Appearance defects of bubbles and silver streaks - A lack of durability and impact resistance by Hydrolysis - Changing defect rate of products caused by weather and moisture Dehumidifying dryer can solve these problems! To reduce appearance defects, "Dehumidifying dryer" is needed not "hot air dryer". ## Difference between "hot air dryer" and "dehumidifying dryer" #### Testing conditions - Material：66PA - Moldable moisture content：1,000 ppm as standard value - Transition of moisture content：Drying for 5 hours starting from 2,800 ppm #### Result - 1 hour later Hot air dryer：1,850 ppm  Dehumidifying dryer：1,600 ppm - 5 hours later Hot air dryer：820 ppm Dehumidifying dryer：440 ppm ## What you can do with dehumidifying dryer - The drying time recommended by the material manufacturer can ensure stable drying. - Stable material supply is possible without being affected by winter or rainy seasons. - It is possible to suppress the defective appearance of products such as silver due to insufficient drying. ![除湿乾燥ユニットMDRⅡ](https://eng.injection-molding.jp/hs-fs/hubfs/%E9%99%A4%E6%B9%BF%E4%B9%BE%E7%87%A5%E3%83%A6%E3%83%8B%E3%83%83%E3%83%88MDR%E2%85%A1.jpg?width=380&name=%E9%99%A4%E6%B9%BF%E4%B9%BE%E7%87%A5%E3%83%A6%E3%83%8B%E3%83%83%E3%83%88MDR%E2%85%A1.jpg) [![Go to watch the product page ](https://no-cache.hubspot.com/cta/default/8087610/7dadad92-7149-4807-9ace-b91bd49d5c88.png)](https://cta-redirect.hubspot.com/cta/redirect/8087610/7dadad92-7149-4807-9ace-b91bd49d5c88) ## Download document ##### Dehumidifying dryer "MDRⅡ" proposal Stabilize quality of products and productivity improvement ![Dehumidifying dryer, MDRII-HARMO](https://eng.injection-molding.jp/hs-fs/hubfs/Dehumidifying%20dryer%2c%20MDRII-HARMO.png?width=374&name=Dehumidifying%20dryer%2c%20MDRII-HARMO.png) [![Download the document of Dehumidifying dryer](https://no-cache.hubspot.com/cta/default/8087610/15350bcc-e4d0-4b51-8e88-4b6c11884892.png)](https://cta-redirect.hubspot.com/cta/redirect/8087610/15350bcc-e4d0-4b51-8e88-4b6c11884892) Recommended other articles [![【For Thailand】ไม่จำเป็นต้องปรับตั้งระยะ (หุ่นยนต์หยิบ/จับ)](https://eng.injection-molding.jp/hubfs/english/OGP/%E3%80%90For%20Thailand%E3%80%91%E0%B9%84%E0%B8%A1%E0%B9%88%E0%B8%88%E0%B9%8D%E0%B8%B2%E0%B9%80%E0%B8%9B%E0%B9%87%E0%B8%99%E0%B8%95%E0%B9%89%E0%B8%AD%E0%B8%87%E0%B8%9B%E0%B8%A3%E0%B8%B1%E0%B8%9A%E0%B8%95%E0%B8%B1%E0%B9%89%E0%B8%87%E0%B8%A3%E0%B8%B0%E0%B8%A2%E0%B8%B0%20(%E0%B8%AB%E0%B8%B8%E0%B9%88%E0%B8%99%E0%B8%A2%E0%B8%99%E0%B8%95%E0%B9%8C%E0%B8%AB%E0%B8%A2%E0%B8%B4%E0%B8%9A%E0%B8%88%E0%B8%B1%E0%B8%9A)%20(1).png) 【For Thailand】ไม่จำเป็นต้องปรับตั้งระยะ (หุ่นยนต์หยิบ/จับ) ](https://eng.injection-molding.jp/blog/no-need-for-stroke-adjustmenttake-out-robot-for-thailand) [![How to shorten the cycle time by 30 with servo-driven sprue picker](https://eng.injection-molding.jp/hubfs/english/Blog/exz%E2%85%A1/How%20to%20shorten%20the%20cycle%20time%20by%2030%20with%20servo-driven%20sprue%20picker/Blog%EF%BC%9AHow%20to%20shorten%20the%20cycle%20time%20by%2030%25%20with%20servo-driven%20sprue%20picker.png) How to shorten the cycle time by 30% with servo-driven sprue picker ](https://eng.injection-molding.jp/blog/how-to-shorten-the-cycle-time-by-30-with-servo-driven-sprue-picker) [![](https://eng.injection-molding.jp/hubfs/english/Blog/For%20Thailand/From%20Pneumatic%20Swing%20Robot%20to%20Servo%20Driven%20Swing%20Robot%EF%BC%884%20major%20advantages%EF%BC%89/Blog%E3%80%90For%20Thailand%E3%80%91From%20Pneumatic%20Swing%20Robot%20to%20Servo%20Driven%20Swing%20Robot(4%20major%20advantages).jpg) 【For Thailand】จากโรบอทสวิงด้วยนิวเมติกมาเป็นโรบอทสวิงด้วยเซอร์โว 2 แกน (ข้อดี 4 ประการ) ](https://eng.injection-molding.jp/blog/from-pneumatic-swing-robot-to-servo-driven-swing-robot-for-thailand) ### Webinar [![](https://eng.injection-molding.jp/hubfs/english/webinar/webinar%20page/20230510/%E3%80%90For%20Thailand%E3%80%91WebinarReduce%20material%20cost%20with%20Gran%20cutter%E3%81%AE%E3%82%B3%E3%83%94%E3%83%BC.jpg) 2023.04.26 【For Thailand】HARMO's Webinar｜Realize the productivity improvement by shortening take-out time with 2-axis servo driven swing robot We prepared the suggestions for the people who have problems such as Productivity improvement, Less operation at mold changing, and Ensure the worker's safety. ](https://eng.injection-molding.jp/seminar/20230510_seminar-eng) [More detail](https://eng.injection-molding.jp/seminar) ### Webinar report [![](https://eng.injection-molding.jp/hubfs/english/webinar/report/20230510/maxresdefault.jpg) 【For Thailand】HARMO's webinar report｜Realize the productivity improvement by shortening take-out time with 2-axis servo driven swing robot ](https://eng.injection-molding.jp/report/20230510_realize-the-productivity-improvement-by-shortening-take-out-time-with-2-axis-servo-driven-swing-robot) [![](https://eng.injection-molding.jp/hubfs/english/webinar/report/20230213/indonesia%20webinar_23.2.13.jpg) 【For Indonesia】HARMO's webinar report｜Reduce material cost with Gran cutter ](https://eng.injection-molding.jp/report/20230213_for-reduce-material-cost-with-gran-cutter-indonesia) [![](https://eng.injection-molding.jp/hubfs/english/webinar/report/20221208/maxresdefault.jpeg) 【For Vietnam】HARMO's webinar report｜Reduce material cost with Gran cutter ](https://eng.injection-molding.jp/report/20221208_for-reduce-material-cost-with-gran-cutter-vietnam) [More detail](https://eng.injection-molding.jp/report) Don't you have problems of Injection molding? Please consult us about automation of production line, productivity improvement, cost and manpower reduction [![今すぐ相談する](https://no-cache.hubspot.com/cta/default/8087610/64902f4b-b89e-43c8-b75e-2b787023e0a9.png)](https://cta-redirect.hubspot.com/cta/redirect/8087610/64902f4b-b89e-43c8-b75e-2b787023e0a9) [![資料ダウンロード](https://eng.injection-molding.jp/hubfs/ico_present@2x-1.png) Document download You can download the document that helps you to improve your production process of Injection molding. Document list ](https://eng.injection-molding.jp/document) [![樹脂のサンプルカット](https://eng.injection-molding.jp/hubfs/ico_online@2x-1.png) Sample cut (Gran Cutter) This is the service of doing sample cut of sprue/runner at Harmo. Please send us your sprues/runners (approximately for 30 shots) to Harmo. 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