TECHNICAL WIKI · 2026 EDITION

Adhesive Coating Machine Ultimate Guide

Complete resource covering working principle, coating methods (slot die, roll, spray, gravure), technical specs, industrial applications, and selection for tape, label, hygiene, packaging & automotive industries.

coating thickness

Coating thickness is the physical dimension of the applied adhesive layer measured perpendicular to the substrate surface, typically expressed in micrometers (µm) or mils. For pressure-sensitive adhesives, typical dry thickness ranges from 10 to 50 µm, with 20-30 µm being common for general-purpose tapes. Thickness is directly related to coat weight by the adhesive density: thickness (µm) = coat weight (gsm) / density (g/cm³). Online measurement is performed using beta-ray or X-ray gauges that measure mass per area, which is then converted to thickness. Offline methods include precision micrometers and optical interferometry. Thickness uniformity across the web and along the length is critical for consistent adhesive performance. Factors affecting thickness include adhesive viscosity, temperature, line speed, and substrate porosity. Tighter thickness tolerances (e.g., ±1 µm) are required for medical and optical applications. Control is achieved through closed-loop adjustment of pump flow or die gap. Proper thickness ensures optimal tack, peel, and shear properties while minimizing material cost. Regular gauge calibration and die maintenance are essential for accurate thickness control.

Adhesive coating machine
Adhesive coating machine


Độ dày lớp phủ là kích thước vật lý của lớp keo đo vuông góc với bề mặt, thường tính bằng micromet. Đối với keo nhạy áp, độ dày khô điển hình 10-50 µm. Độ dày liên quan đến trọng lượng phủ qua mật độ. Đo trực tuyến bằng máy đo beta/X-quang. Các yếu tố ảnh hưởng gồm độ nhớt, nhiệt độ, tốc độ và độ xốp. Dung sai chặt cho ứng dụng y tế và quang học. Điều khiển qua vòng kín. Bảo trì khuôn và hiệu chuẩn là cần thiết.

Coatingdikte is de fysieke afmeting van de aangebrachte lijmlaag gemeten loodrecht op het substraatoppervlak, meestal uitgedrukt in micrometers. Voor drukgevoelige lijmen varieert de typische droge dikte van 10 tot 50 µm. Dikte is gerelateerd aan laaggewicht via dichtheid. Online meting met beta- of röntgenmeters. Factoren zijn viscositeit, temperatuur, snelheid en porositeit. Strikte toleranties voor medische en optische toepassingen. Regeling via gesloten lus. Matrijsonderhoud en kalibratie zijn essentieel.

আবরণের বেধ হল স্তরের পৃষ্ঠের সাথে লম্বভাবে পরিমাপ করা প্রয়োগকৃত আঠালো স্তরের ভৌত মাত্রা, সাধারণত মাইক্রোমিটারে প্রকাশ করা হয়। চাপ-সংবেদনশীল আঠালোর জন্য সাধারণ শুষ্ক বেধ ১০-৫০ µm। বেধ ঘনত্বের মাধ্যমে আবরণ ওজনের সাথে সম্পর্কিত। অনলাইন পরিমাপ বিটা বা এক্স-রে গেজ দিয়ে করা হয়। প্রভাবিতকারী উপাদানগুলি হল সান্দ্রতা, তাপমাত্রা, গতি এবং ছিদ্রতা। চিকিৎসা এবং আলোকীয় প্রয়োগের জন্য কঠোর সহনশীলতা প্রয়োজন। ক্লোজ-লুপ সমন্বয়ের মাধ্যমে নিয়ন্ত্রণ। ডাই রক্ষণাবেক্ষণ এবং ক্রমাঙ্কন অপরিহার্য।
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