Internal sizing

FennoSize AS is a performance-driven internal sizing program that consists of 100% active liquid ASA sizing products (alkenyl succinic anhydride). The synthetic sizing agents are highly reactive and together with Kemira’s efficient on-site ASA emulsification techniques, they allow over 90% immediate sizing development.

• Applied for hydrophobation of e.g. fine paper, liner, sack paper, packaging board, containerboard, and gypsum board.
• Used typically for neutral and alkaline sizing (pH 7–8), but works over a wide pH range 5–9
• No curing time needed
• Advanced production ensures high ASA sizing purity and quality

Kemira’s latest innovation in sizing chemistry is the biobased, ASA-like internal sizing agent. Made from maleated high oleic sunflower oil (MSOHO) instead of the fossil-based olefins that are used in traditional ASA sizing, the “sunflower ASA” helps improve the environmental footprint of the paper and board. Product performance, application, and cost-efficiency are similar to standard ASA sizing. Our current FennoSize MO product is a mixture of MSOHO and standard ASA sizing.

• Applicable to various paper and board grades
• Manufactured from renewable, locally available sunflower oil
• Applicable for a wide pH range
• Highly reactive as synthetic ASA sizing
• Fulfills BfR and FDA regulations and is compliant to be used in food contact

Read more: FAQ Renewable sizing chemistry

FennoSize KD portfolio consists of easy-to-use anionic or cationic alkyl ketene dimer (AKD) products for various grades, e.g. fine paper, printing paper and packaging boards, and molded fiber products. AKD sizing agents are used when a hard sizing is needed.

• Applicable to various paper and board grades and molded fiber
• Efficient, fast, and even sizing
• Provides unique resistance to lactic acid
• Applicable to moderately acidic, neutral or very alkaline processes (up to pH 10)
• Improved paper machine and process runnability

Our portfolio of rosin sizes includes a wide variety of cationic and anionic rosin dispersions and liquid rosin soap. Starch-stabilized FennoSize RS and polymer-stabilized FennoSize RN portfolios include gum and tall oil rosin, ensuring high performance for different paper and board grades and various temperature, pH, and other wet end conditions.