Paper Impregnation & Coating Lines
Kraft Paper One Step Impregnation Line
Designed for high speed, low phenolic-formaldehyde resin add-on, and long service life, this one-step impregnation line is suitable for Formica HPL and compact HPL core paper production. A high-speed rotary sheet cutter improves line speed and overall efficiency.
Core process capabilities
Production applications
Equipment and process details
Final parameters and system boundaries are confirmed against materials, process targets, capacity and site conditions.
Key Features
High-Speed Design: Engineered for rapid production cycles, significantly increasing output rates without compromising quality. Low Resin Pickup: Advanced technology ensures minimal resin uptake, reducing costs and improving the environmental footprint. Longevity: Built with high-quality materials and components, this line offers extended operational life and reduced maintenance needs. Versatile Application: Perfectly suited for the production of high-pressure laminate (HPL) surfaces and core layers, providing the essential properties needed for durability and aesthetics in final products.
The one-step impregnation line for phenolic kraft paper is usually built as a 4 ft line, suitable for 4 x 8 ft and 1.3 x 2.8 m HPL finishing. In some cases, customers also impregnate 8-foot-wide paper and cut it into 8 x 4 ft sheets to improve efficiency.
In compact HPL production, urea- and formaldehyde-based resin systems are used after condensation to form water-based resins with low shrinkage, chemical resistance, and low surface deformation tendency. Light-colored plain or woodgrain papers are pressed in a short-cycle laminating hot press after the impregnation process. During production, the paper passes through a resin tank containing urea-formaldehyde or urea-melamine resin and then receives a second coating of pure melamine resin.
Especially in the production of light-colored paper, the opaque components in the urea resin improve the covering power of the impregnated paper during hot pressing. The first section uses urea resin to impregnate the paper, helping balance tension between the board surface and the press surface.
One-step Impregnation Line contents below unit:
1. Instant force horizontal kraft unwinder.
2. Vertical squeezing metering roller, tailored for phenolic-formaldehyde resin.
3. 3.75 m high-airflow heating chambers.
4. Enhanced air cooler.
5. Kraft paper web aligner.
6. Circulating-water-cooled drum tractor.
7. High-speed rotary cutter.
8. High-speed bridge conveyor.
9. Hydraulic lift paper stacker.
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