Heavy Duty Wood Paper Coating Line

-- Steady & Reliable Manufacturer --

Introduction

A heavy duty wood paper coating line applies one or more functional or decorative coating layers to a printed or unprinted decorative base paper, adding properties that the paper substrate alone cannot provide: increased surface hardness, moisture resistance, scratch resistance, anti-fingerprint performance, or a specific surface gloss level. Coating is often the final step before the paper is cut, slit, and delivered to downstream lamination or impregnation processes.

Zhejiang Meige's heavy-duty coating lines are designed for the demanding mechanical requirements of thick, heavy base papers used in HPL, heavy furniture overlay, and industrial surface applications. "Heavy duty" in this context refers both to the substrate weight handled (up to 200 g/m² and above) and to the coating weight applied — direct gravure and reverse gravure coating heads on our lines handle wet coating weights from 2 g/m² (thin primer) to 30+ g/m² (heavy barrier coat) in a single pass.

Available as standalone coating lines or integrated inline with a gravure printing press, our coating platforms serve decorative paper mills, HPL manufacturers, and specialty paper producers who need coating capability independent of or combined with their printing operations.

Specification

Coating Method	Direct gravure, reverse gravure, comma bar, or slot die (configurable)
Coating Weight Range	2 – 35 g/m² dry weight per station
Coating Stations	1 / 2 / 3 stations (inline or sequential)
Web Width	1,280 mm – 2,200 mm
Line Speed	30 – 150 m/min (coating application dependent)
Substrate Weight	50 – 250 g/m² (heavy-duty platform)
Coating Chemistry	Aqueous acrylic, UV-cure, melamine pre-impregnation primer, wax emulsion, polyurethane dispersion
Drying / Curing	Multi-zone hot-air impingement (aqueous); UV lamp array (UV cure)
Tension System	Heavy-duty closed-loop load-cell; high-torque drives for thick substrates
Unwind / Rewind	Ø 1,500 mm shafted or shaftless; auto-tension; flying splice option
Coat Weight Control	Inline beta-ray or NIR coat weight sensor with feedback to coating head gap
Control System	Siemens PLC + HMI; coating weight trending display
Optional Add-ons	Calender stack for gloss development, corona station, anti-static bar
Certification	CE, ISO 9001:2015

Application

HPL face paper pre-coating — applying a primer or ground coat to heavy alpha-cellulose base paper before gravure printing, improving ink adhesion and reducing ink consumption.
Melamine pre-impregnation barrier coat — applying a partial resin pre-coat to base paper before full impregnation, improving resin distribution uniformity on high-porosity papers.
Surface hardness and scratch resistance coating — applying UV-curable hard coat formulations over printed décor paper for direct-use furniture surfaces that do not undergo HPL pressing.
Anti-fingerprint and easy-clean coating — hydrophobic or oleophobic top coats for kitchen and bathroom furniture surface papers.
Moisture barrier coating for humid environments — applying polyurethane or wax-emulsion barrier coats to decorative papers used in bathroom panels and exterior-grade applications.
Gloss development by calendering — inline calender stack after coating produces surface gloss levels from 20 GU (matte) to 80+ GU (high gloss) without additional processing steps.

Advantages

Heavy substrate handling capability — purpose-built for papers and boards up to 250 g/m²; tension system, unwind/rewind drives, and coating head pressure are all sized for the high web tensions and coating forces involved with heavy substrates.
Multi-coating-method flexibility — gravure, reverse gravure, comma bar, and slot-die coating heads are interchangeable on the same machine frame, allowing the same line to apply thin precision coats (gravure) and heavy functional layers (slot-die) for different products.
Inline coat weight measurement — NIR or beta-ray coat weight sensor provides real-time feedback to the coating head gap servo, maintaining coat weight within ±0.5 g/m² without operator intervention.
UV cure option for instant surface hardness — UV-curable hard coat stations cure completely within 0.1 seconds, enabling high line speeds without long drying tunnel requirements; finished paper is immediately handleable at rewind.
Inline with printing press option — the coating line can be integrated at the output of a gravure printing press, eliminating the intermediate reel and re-threading step and reducing paper handling damage between print and coat.

Payment & Shipping

Payment Terms: 30% T/T deposit; 70% T/T before B/L. L/C at sight for orders ≥ USD 150,000.
Lead Time: Standalone coating line: 90–120 days. Inline print+coat combination: 130–160 days.
Packaging: UV lamp arrays shipped in padded dedicated cases. Coating head assemblies foam-lined and moisture-protected. Main frame VCI-wrapped in export crates.
Shipping: FOB Ningbo / Shanghai. CIF, DAP available.
Commissioning: FAT at factory. 2 engineers on-site 14–21 days; coating weight calibration, dryer/UV cure commissioning, and trial run with customer's coating chemistry.
Warranty: 12 months from commissioning or 18 months from shipment.

Q: What coating method is best for applying a hard coat over printed décor paper?
A: For UV-curable hard coats at 5–15 g/m² dry weight, reverse gravure coating gives the most uniform film and best surface levelling on printed papers. Direct gravure can be used for lighter coat weights below 5 g/m². Comma bar and slot die are preferred for heavier functional coats above 15 g/m² where levelling is less critical than coat weight accuracy.

Q: Can the coating line handle UV-curable and aqueous coatings on the same machine?
A: Yes. Our multi-station coating line can include both hot-air drying zones (for aqueous coatings) and UV lamp arrays (for UV-cure coatings) in sequence. A typical configuration for a premium furniture paper might apply an aqueous primer in station 1, a UV hard coat in station 2, and a UV matting top coat in station 3 — all in a single pass at 60–80 m/min.

Q: What is the typical coat weight for a melamine pre-impregnation primer?
A: Pre-impregnation primer coats for melamine overlay papers typically range from 3–8 g/m² dry weight. The purpose is to partially seal high-porosity base papers to create a more uniform resin absorption profile in the subsequent impregnation bath, reducing the coat weight variation that causes press-bond failures in thin papers. The optimal coat weight depends on the base paper porosity and the melamine resin pick-up target.

Q: Is inline coat weight measurement necessary, or can we measure offline?
A: Offline measurement (cut sample, dry, weigh) introduces a time lag of 30–60 minutes before a coat weight deviation is detected and corrected. At 100 m/min, this means 3,000–6,000 m of paper at the wrong coat weight before correction. Inline measurement corrects deviations within seconds, reducing waste and protecting coating chemistry costs. For high-value coatings or tight specification papers, inline measurement typically pays back its cost within the first year of production.

since 1999

Zhejiang Meige Machinery Co., Ltd.

Zhejiang Meige Machinery Co., Ltd., founded in 1999 and located in Lin'an District. Hangzhou City, Zhejiang Province, is a national high-tech enterprise specializing in the research and development of intelligent and automated series gravure printing machines and the production and sales of prepress and post-press supporting equipment. After more than 20 years of development and technology accumulation, a variety of series of products have been formed. As China Heavy Duty Wood Paper Coating Line Manufacturers and Heavy Duty Wood Paper Coating Line Factory, the main products are drum decorative paper intaglio printing machine series, PVC, PP decorative film intaglio printing machine series, PVC film multi-layer non adhesive composite embossing production line, textile transfer printing paper (film) intaglio printing machine series, etc, lt is widely used in Engineered wood decorative materials, ubiquitous household industry, and textile transfer printing industry. Megger Machinery has a market share of about 60% in domestic Engineered wood decorative paper printing presses; The market share of PVC and Pp decorative film printing composite production lines is about 50%, The textile transfer printing paper (film) equipment is leading domestically, and the products have been exported to international markets such as Europe. America, the Middle East, and Southeast Asia.
The company currently has a large number of professional and technical research teams, including doctors, experts, professors, senior engineers, and school enter-prise cooperation. The company leads the development of the enterprise through technological innovation, continuously improving and leading the launch of high-performance high-speed automation, intelligence, and digital control printing machine products, as well as research on high-quality development projects for traditional industrial digitization. At the same time, the company has a complete product quality system and ERP information network material control management system, as well as a complete after-sales service system.
The company has passed the "Quality, Environment, and Occupational Health Management System Certification". Obtained more honorary titles such as the world's home furnishing award "Lingju Award", "National High Tech Enterprise", "Provincial High tech Enterprise Research and Development Center", "Provincial Science and Technology Enterprise", "Zhejiang Provincial Industrial Design Center", "Hangzhou Patent Demonstration Enterprise", "Zhejiang Provincial Specialized, Precision and New Center Enterprise", "Top 100 Chinese Home Furnishing Brands with Com-prehensive Strength", "Zhejiang Manufacturing Quality Product Logo", and so on, At the same time, it has also won three "high-tech new products in Zhejiang Province"two "the set of major technical equipment manufacturing industry in China" and more than 100 List of Chinese inventions patents, Chinese utility model patents, and Chinese design.ln addition, it has also won many provincial and municipal science and technology innovation awards and China's forestry industry Engineeredwood industry science and technology innovation awards. The company is a member of the National Printing Machinery Standardization Technical Committee and is responsible for formulating three national standards for energy efficiency evaluation of drum decorative paper, transfer printing paper gravure printing machines. printing machinery ink drying and curing devices, eight national industry standards. and two local standards for Zhejiang manufacturing as the main drafting unit.

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