Sizer roll covers for board and paper making
Excellent board and paper quality with Valmet sizer roll covers
The film sizing and film coating process plays a critical role in determining both the strength and appearance of paper and board. As these processes are performed inline on the paper machine, they have a direct impact on machine efficiency, runnability, and final product quality. This places exceptionally high demands on sizer roll covers used in board and paper making.
Wide range of roll covers for film sizers, spray sizers and pond sizers
For sizing, pigmenting and coating applications, Valmet offers a comprehensive selection of roll cover solutions, including:
- Soft and hard rubber covers
- Polyurethane roll covers
- Composite roll covers
- Ceramic coatings
Valmet sizer roll covers are suitable for all common sizer configurations, including:
- Film sizers
- Spray sizers
- Pond sizers
- GRSP applications
Thanks to optimized surface properties and material stability, Valmet sizer covers ensure uniform coat weight profiles and consistent film transfer, resulting in excellent paper quality and low maintenance requirements.
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Sizer Roll Cover CF and SH product families
The Sizer Roll Cover CF and Sizer Roll Cover SH product families have been developed using specially formulated rubber and polyurethane materials to support a stable and disturbance-free sizing process.
Key performance characteristics include:
- High wear resistance
- Excellent CD profile stability
- Controlled surface roughness
- Long running times with stable film amount
Extensive delivery references confirm the proven performance and reliability of these roll cover solutions in demanding board and paper applications.
Advanced composite roll covers
To continuously improve performance, Valmet has recently introduced updated composite roll covers for pond sizers and hard-nip sizers. These composite solutions offer:
- Increased running time compared to hard rubber covers
- Improved mechanical strength and durability
- A cost-effective alternative to hard coatings
Find more detailed product information
Use Valmet’s Solution Finder to explore detailed product information and identify the optimal sizer roll cover for your specific board and paper process
Improving board and paper quality with iRoll Sizer
Quality defects caused by CD profile variations, such as uneven coat weight distribution, lead to higher material consumption and increased production costs per ton.
With iRoll Sizer, new opportunities are created to improve sizing and coating quality through:
- Simultaneous measurement of the roll nip profile
- Applicator rod profile monitoring
- Improved film profile control
When combined with Valmet polyurethane sizer roll covers, the iRoll Sizer solution enables superior profiling accuracy, increased process stability, and improved overall board and paper quality. The full benefits of iRoll Sizer are available with Valmet polyurethane roll covers.
Find optimal roll covers for every board and paper process
Explore our roll cover products targeted for sizing from interactive demo. By exploring this roll cover application tool you can easily see different cover options for every board and paper making process. (The tool is temporarily under update)
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