Cardboard boxes.
Unique and comprehensive offering for dry strength

Dry strength additives

Dry strength is a key quality parameter for all paper and board grades. Kemira’s broad portfolio of dry strength additives include specifically designed technologies to be used with virgin, mechanical, recycled or mixed fibers and for the production of various paper, board, and tissue grades as well as molded fiber. Combined with best-in-class application expertise, our products enable paper, board, tissue and molded fiber manufacturers to manage and optimize the dry strength properties in their end-products ensuring cost-efficiency, productivity, and machine runnability.

FennoBond™ products for improved strength and productivity

Our FennoBond dry strength additives are a versatile portfolio of synthetic strength resins for increasing dry strength of paper, board, and tissue grades, as well as molded fiber. Most FennoBond products are cationic or anionic polymers based on polyacrylamide chemistry and can be applied either in the wet end or added as sheet spray application.

  • Engineered celluloce additive (ECA)
  • Amphoteric polyacrylamide
  • Cationic glyoxalated polyacrylamide (GPAM)
  • Cationic solution polyacrylamide (C-SPAM)
  • Cationic dispersion polyacrylamide (Micropolymer)
  • Anionic solution polyacrylamide (A-SPAM)

Depending on grade requirements and the process, several FennoBond products can be utilized or combined into dual strength systems.

Strength types improved by FennoBond products:

  1. Tensile
  2. Burst
  3. Compression (SCT, RCT, CMT, CCT)
  4. Stiffness
  5. Internal (Scott bond)
  6. Surface (lint or dust reduction)

Benefits from dry strength increase

You can utilize extra strength gained from using FennoBond dry strength additives in multiple ways, depending on your production targets.

Trade-off strength Produce lower grammage (fiber and steam savings, improved mchine speed)
Reduce refining (energy savings, less dust)
Reduce chemical consumption (wet strength resins, starch, retention polymers)
Substitute fibers with cheaper fibers or fillers
Keep strength Upgrade quality or avoid overweighting
Improve machine runnability
Improve converting efficiency
Increase productivity and dewatering



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Technical data sheet


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