روند توسعه در فناوری پوشش‌های پودری

نوع مقاله : مروری

نویسندگان

1 1- تهران، شرکت پلی‌رزین، واحد تحقیق و توسعه، کد پستی 1586716714 و 2- دانشگاه صنعتی امیرکبیر، دانشکده‌ مهندسی پلیمر و رنگ، کد پستی 1591634311

2 1- تهران، شرکت پلی‌رزین، واحد تحقیق و توسعه، کد پستی 1586716714

چکیده

امروزه کاهش استفاده از ترکیبات آلی فرار یکی از مهم‌ترین موضوعات مطرح برای حفاظت از محیط‌زیست است. پوشش‌های پودری از دهه 1950 میلادی با توجه به دوستداری محیط‌زیست و عملکرد عالی، به‌طور گسترده در حوزه‌ پوشش‌دهی سطوح فلزی، به‌ویژه خطوط لوله و لوازم خانگی و اداری استفاده شده‌اند. این نوع پوشش‌ها، نوعی پوشش جامد و بدون حلال هستند که به‌حالت پودر با روش‌های مختلف مانند الکتروستاتیک یا بستر سیالی روی سطح اعمال شده و سپس با گرما پخت می‌شوند. در این مطالعه، ابتدا تاریخچه‌ روند توسعه پوشش‌های پودری شرح داده‌ شده است، سپس انواع پوشش‌های پودری، روش‌ها و فرایند تولید آن‌ها بیان شده و در ادامه روند پژوهشی درحال انجام در زمینه این نوع از پوشش‌ها با تاکید بر نوع و مشخصات رزین‌های مصرفی در این صنعت، گزارش شده است. همچنین با توجه به اهمیت رزین‌های پودری در فرمول‌بندی رنگ پودری، عملکرد انواع رزین‌های گرمانرم و گرماسخت استفاده‌شده در این سامانه‌های پوششی پودری از جمله پلی‌پروپیلن، پلی‌اتیلن، پلی‌(وینیل کلرید)، فلوئوروپلی‌اتیلن، نایلون، اپوکسی، پلی‌استر، پلی‌یورتان، آکریلیک، سلولوز استات بوتیرات و رزین‌های بازیافتی با یکدیگر مقایسه شده‌اند. افزون بر این، نحوه‌ اعمال و تشکیل فیلم در پوشش‌های الکتروستاتیک و عوامل اثرگذار بر آن‌ها به‌طور کامل بررسی شده است. برخی از چالش‌ها و معضلات این صنعت بزرگ نیز در راستای ارتقا کیفیت و بهبود روش‌های اعمال و پخت معرفی شده‌اند. در نهایت، رویکردهای فنی نوین، با هدف صرفه‌جویی در مصرف انرژی و زیست‌سازگاری بیشتر محصولات پودری، مانند استفاده از فناوری پخت زیرقرمز، سامانه‌های تابش‌پز با پرتو فرابنفش یا قابلیت پوشش‌دهی سطوح حساس به دما با استفاده از پوشش پودری، بیان شده‌اند.

کلیدواژه‌ها

عنوان مقاله [English]

The Developed Trends in Powder Coatings Technology

نویسندگان [English]

  • SAHAR ABDOLLAHI BAGHBAN 1
  • Rahy Rad 2
1 1. Research and Development Department, Polyresin Co. Postal Code 1586716714, Tehran, Iran, 2. 2. Department of Polymer and Color Engineering, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
2 Research and Development Department, Polyresin Co. Postal Code 1586716714, Tehran, Iran
چکیده [English]

Today, reducing the use of volatile organic compounds is one of the most important issues for environmental protection. Since the 1950s, powder coatings have been widely considered in the surface coating field, especially pipelines, households, and office appliances, due to their environmental friendliness and excellent performance. These types of coatings are solid and they are applied to the surface in the form of powder using different methods such as electrostatic or fluidized bed and then they are cured by heat. In this study, a brief history of the development of powder coatings is described, and it is continued by full report on the types of powder coatings, their production methods and processes, and the research process, emphasizing the type and characteristics of the resins used in this industry. Considering the importance of powder resins in the formulation of powder coatings, the performance of various thermoplastic and thermosetting resins used in these powder coating systems, including polypropylene, polyethylene, poly(vinyl chloride), fluoropolyethylene, nylon, epoxy, polyester, polyurethane, acrylic, cellulose acetate butyrate, and recycled resins are compared. In addition, the method of application and film formation in electrostatic coatings and the factors affecting them are investigated comprehensively. Furthermore, some of the challenges and problems of this giant industry will be introduced in order to improve its quality and curing methods for to expand the applications. Finally, new technical approaches, aiming to save energy and produce more biocompatible powdered products, using infrared curing technology, curing by ultraviolet radiation, or the ability to coat sensitive-temperature surfaces by powder coating are described. 

کلیدواژه‌ها [English]

  • powder coatings
  • thermoset and thermoplastic resins
  • electrostatic spray
  • polyester
  • epoxy

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مجله علوم و تکنولوژی پلیمر
دوره 36، شماره 1 - شماره پیاپی 183
فروردین و اردیبهشت 1402
صفحه 23-46

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