Grey-Back Coated Whiteboard Machine
Deployed at Wenzhou Yongjia Rixin Paper Industry，Production Specifications:Paper Type: Grey-back coated whiteboard (also known as grey-back coated cardboard)，Model/Speed/Configuration: 4200 mm width, 350 m/min speed, 59 dryer cylinders
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Fourdrinier Paper Machine
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Description
The Grey-Back Coated Whiteboard Machine is specialized equipment for producing grey-back coated whiteboard.Its core feature lies in applying a white coating layer over a grey base pulp layer,creating a paperboard with a bright,smooth surface and a grey underside.Below is a detailed introduction:
1.Characteristics of Grey-Back Coated Whiteboard
a.Structure
Base Layer(Grey):Made from recycled waste paper or mechanical pulp,offering low cost and high rigidity.
Top Layer(White):Coated with high-brightness materials(e.g.,calcium carbonate,kaolin)to enhance printability and aesthetics.
b.Applications：Packaging boxes,book covers,gift boxes,high-end product labels,and other fields requiring premium surface printing quality.
2.Key Components of a Coating Machine
a.Base Sheet Preparation System
Pulper&Refiner:Process recycled paper materials to form base pulp.
Multi-Layer Headbox:Enables stratified formation(typically 3 layers:top,core,and base).
Fourdrinier or Multi-Wire Former:Ensures uniformity and strength of the paperboard.
b.Coating System(Core Process)
Pre-Coating:Base layer coating to fill fiber gaps.
Top Coating:Application of high-brightness coating(may use blade coating,air knife coating,or curtain coating).
Drying:Infrared drying,hot air drying,or dryer cylinder systems to cure the coating.
c.Calendering&Finishing
Soft Calender:Enhances surface smoothness and gloss.
Supercalendering(Optional):For ultra-high gloss requirements.
d.Winding&Slitting
Jumbo Reel Winding:Rolls paper into large-diameter parent reels.
3.Key Technical Points of Equipment
a.Coating Technology:
High-precision coating head(e.g.,short dwell coater)ensures uniform coating.
Coating formulation must balance whiteness,adhesion,and cost.
b.Drying Control:Avoid over-drying to prevent cardboard warping.
c.Eco-friendly Design:Wastewater treatment system(due to the use of waste paper raw materials).Exhaust gas recovery(coating solvents).
Keyword： Grey-Back Coated Whiteboard Machine
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Service Tel：
Mobile：+86-18839165111
Company Address：Chongyi Industrial Zone, 5 kilometers south of Qinyang City, Henan Province
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