Wet Strength Agent For Paper. Regulatory FrameworkNonGovernmental GuidelinesMill CasesConclusionIn the light of rising concerns about a potential migration of DCP/MCPD into the food chain deriving from food contact paper and board in 2001 the German Federal Institute of Risk Assessment BfR has implemented limits for DCP and MCPD that may be extracted with water from a paper sample in their recommendations XXXVI for food contact paper and board grades “13Dichloro2propanol must not be detectable in water extract of the finished product (detection limit 2 μg/l) The transfer of 3monochloro12propanediol into the water extract of the finished products must be as low as technically achievable a limit of 12 μg/l must not be exceeded in any case” Table 1 gives an overview of the different guidelines for sampling and preparation of the aqueous extract in misc paper grades Table 1 Extraction methods for the determination of 13DCP and 3MCPD in paper samples The sampling and extraction methods reflect the real exposure Hence a significantly higher DCP and MCPD cont Relevant Ecolabel systems in Europe contain direct limits for DCP/MCPD in the wet strength agents The limits set for DCP/MCPD in the “EU Ecolabel for Tissue Paper (2009/568/EC)” and the ”Nordic Ecolabelling of Tissue Paper (Nordic Swan)” say that “Wet strength agents must not contain more than 07 % of the chloroorganicsubstances ECH DCP and MCPD calculated as the sum of the three components and related to the dry content of the wet strength agent” In practice the limit can be particularly associated with DCP/MCPD as uptodate WSAs do not contain ECH after production According to the technical report 30 of the EC´s Joint Research Centre a revision of the EUEcolabel criteria for Paper products is in preparation The current criteria document 2009/568/EC will be repealed by December 31st 2018 The revision is more restrictive regarding the maximum content of ECH DCP and MCPD as the combined content must not exceed 035 % of the active solids in future Table 2 gives an Study 1 – Excessive MCPD contents in kitchen towel after increase of short fiber ratio BackgroundA manufacturer of virgin fiber based consumer tissue products for private label couldn´t meet the BfR requirements at higher wet strength agent dosages after increase of the short fiber ratio from 40% to 70 % resulting in an increase of WSA dosage by 30 % A System overview is shown in Table 3 Table 3System overview of mill study 1 ObjectiveRestoring compliance with BfR requirements ApproachA G25 WSA with reduced contents of chloroorganic compounds (Giluton 20 XP 20 % dry solids ca 650 ppm DCP/MCPD) AchievementsGiluton 20 XP was found suitable to safely control DCP/MCPD in the aqueous paper extracts below the limits Furthermore Giluton 20 XP has shown similar performance compared to the G2 WSA Study 2 – High OXcontents in TCFgrades BackgroundA manufacturer of virgin fiber based premium tissue products couldn´t meet the market requirement of max 30 mg/kg OX (organicall Thanks to intense R&D efforts and their resulting improvements regarding efficiency and sustainability PAE resins represent the best in class technology for the manufacturing of wetstrengthened papers such as tissue A broad range of available products with adapted purity levels enables papermakers to meet the requirements of the current regulatory framework as well as the latest requirements of different Ecolabel systems on the lowest possible costinuse level REFERENCES 1 Kramer Gunnar Stumm Dominik chapter 464 Wet Strength resins in Holik Herbert (ed) Handbook of Paper and Board Volume 2 WileyVCH Weinheim (2013) 2 bfrbundde Database BfR Recommendations on Food contact materials Recommendation XXXVI0 Paper and Board for Food contact Berlin (2017) 3 CEPIIndustry Guideline for the Compliance of Paper & Board Materials and Food contact articles page 2 Confederation of European Paper Industries Brussels (2012) 4 Public Health Committee chapter 122.
Wetstrength resin chemicals are introduced to the stock for producing paper or tissue Paper often retains 3 to 5 percent of its dry strength after being thoroughly wet which is most usually called to be the support of fibertofiber friction Wet strength resin chemicals give the paper 10 to 50 percent of its dry strength when wet However this property is often used in other paper and paperboard categories too such as kitchen towel paper coffee filters sanitary towels and some 5/5 (10).
Wet Strength Agent (WSR) PAE Based For Tissue Paper To
Kymene wetstrength additives are watersoluble polymer products The most commonly used solutions are formulated with polyamideepichlorohydrin (PAE) resin chemistry and are intended primarily for the consumer market PAE resins function in neutral/alkaline papermaking processes.
Kymene™ Wet Strength Additives Solenis
PAE paper wet strength agent is polyamide epichlorohydrin resin which is a watersoluble cationic thermosetting resin It is an excellent wet strength agent for paper makingPAE molecular chain contains groups with strong positive electric charge which can strongly adsorb with negatively charged fibers or fillers Appearance Light yellow transparent liquidPH 3070Content (%) 125%&15%Viscosity (25℃) 3070cps.
Wet Strength Agent Wsr Pae Based For Tissue Paper To Improve Wet Strength
WetStrength Development of Paper
Balaji For Tissue And Wet Strength Agents Paper Production
PAE WET STRENGTH AGENTS TARGETING HIGH PERFORMANCE AND FUTURE
efficient as wetstrength agent but pretreatments of fibres should be done under controlled conditions Wetstrength polymers are used to develop or conserve the mechanical strength of paper when wetted Wetstrength agents are added in various paper products such as hand towels hygiene paper and packaging grades.