Kemira cuts wsr use with Fennobond
Wet strength in tissue and towel products is traditionally achieved by using relatively high dosages of wet strength resin (WSR), says Finland’s Kemira. This puts a substantial pressure on the tissue maker’s profitability from both high chemical cost and negative effects from WSR on machine runnability such as foaming, felt deposits and reduced dewatering.
Tissue makers are also under pressure to reduce AOX in their effluent, to which WSR can be a significant contributor. Kemira has developed chemical solutions to provide economic and environmental advantages in the production of wet-strengthened paper grades. A white paper*, originally presented at Tissue World Milan 2017, discusses these concepts and demonstrates their benefits with industrial case studies.
• A towel producer wanted to achieve low AOX levels as required by its customer. Reducing chemical costs was important for their machine. Kemira offered a new, high-efficiency G2.5 FennoStrength WSR. Results of the trial showed 25% less resin was needed to maintain sheet quality and AOX targets. This resulted in over 10% net savings for the towel producer.
• A towel manufacturer needed to improve the safety of using carboxymethylcellulose (CMC) powder in the make-down area to control fiber charge and provide dry tensile. To help improve the safety hazards due to old CMC technology, including dust and slippery floors, Kemira replaced the CMC with FennoBond, a synthetic anionic product that is supplied in liquid form and only requires a pump to feed the chemical.
*Visit the Kemira web site (see below) for a copy of the white paper: More with less: Profitable and Sustainable Solutions for Wet-strengthened Tissue Grades; by Vladimir Grigoriev and Eric Padovani.