Search results

Importance and limits of hardness in wound roll quality

Building a good roll requires controlling hardness. Hardness is dependent on paper characteristics and the tension distribution throughout the wound roll.

Observations from the field: improving recovery boiler operations

Are you looking to establish a safer work environment, reduce outage time, make environmental compliance easier, or all of the above? Explore some ready-made services that can help you realize ROI on your energy and recovery goals.

Wet end tools for paper/board quality and strength (webinar)

An upcoming webinar describes how each component at the wet end of a paper machine can be operated to optimize the quality and the strength of specific grades.

Safety improvements at the reel and winder (webinar)

Valmet experts discuss safety standards relating to reels and winders, and what can be done to improve operator and equipment safety with today's technology.

Operational basics of Compaction Baffle Filters (webinar)

Producing chemical pulp requires several unit operations involving washing dissolved solids from the pulp. The CB Filter combines two operations in one machine.

Energy consumption minimization in LC refining (webinar)

Low-consistency refining uses a significant amount of a mill's electricity consumption, especially refining in paper/board grades based on virgin fibers.

Sizer rods: Does size matter, is big and slow the way to go?

Film size presses use rotating rods to control the starch or coating film applied on the applicator roll. Rod diameter varies depending on the application.

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.