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Helpful coating tips: jet angle, gap, critical factors, etc.

Factors that increase coat weight: decrease of blade load, decrease tip angle, increased viscosity/solids, increase speeds & increase in sheet roughness.

Helpful tips on retention chemistry, coagulants, starch, etc.

Most microparticle systems are based on anionic products, silica, micropolymers and bentonite. Retention aid systems involve coagulants, macroflocculants and microflocculants.

Helpful tips for size pressing: properties, load, vibration…

Sheet properties when using size include - increased internal, surface, tensile strength, stiffness and roughness; decreased porosity, opacity and whiteness.

Common pulp washing fundamentals – How and why do we wash pulp?

Washing of pulp is a critical unit operation in the fiberline. Although washer designs differ, each type functions to wash pulp using common fundamental principles.

Storage, operation and maintenance of rubber covered rolls

Analysis of your roll records identifies ways to improve rubber roll performance. The cover is a measuring instrument indicating where changes are needed.

Comparison of hard and soft bearing roll balancing methods

Hard bearing type balancers measure residual unbalance. Soft bearing type balancers use a stroboscope and pickups to measure vibration amplitude and direction.

Dryer service case study – setting up a baby dryer doctor

This article reviews a service call made at a USA linerboard mill to diagnose and adjust their dryer doctor, including actions taken and recommendations.

Shoe press case study - Remote services available 24/7/365

Experts monitor your process on a regular basis and contact you when an issue is identified. Your machine also contacts Valmet experts keeping you Up & Running.

Calender case study - CD caliper control & sheet breaks

A southern USA mill requested Valmet expert assistance, specifically a process and condition audit of their online single nip calender.

Guide to dryer section performance, key operating parameters

Here are some notes regarding key operation parameters of the dryer section, starting with the three zones related to effective drying rate.