STUDY OF POLYMERS POLIKATIONIC ELECTROKINETIC PROPERTIES OF DEINKING AND MECHANICAL STRENGTH OF TESTLINER
Abstract
Effect of fixatives, flocculants and binder to improve wet strength on electrokinetic properties of deinking and mechanical properties of test liner investigated.
The pulp was prepared from 100% waste paper grade MS–5B, 2nd grade. Deinking Yokro milled in a mill at a concentration of 6% to 30 ºSHR and milled mass produced from castings weighing 125 g/m2. Investigated HVV produced by "SKIF Special Chemicals" – "Polyamine SSC", "Polyamine CCK" with an increased content of amino groups "Ultrafiks P–127", a binder for strengthening paper (cardboard) wet – RRU 1 and retainer "polyDADMAC"(polydiallyldimethylammonium chloride) – import, anionic polyacrylamide (A–PAM) and aluminum polyoxychloride (Pohang). Chemicals individually or in combination added to the mass with certain specific consumption.
As indicators were monitored: for wastepaper – the ζ–potential cationic demand subgrid water: for test liner – specific tensile strength; absolute bursting; interfiber binding energy by Scott–Bond, absorbency – Kobb60, breaking length, tear resistivity.
It was found that most significantly reduces the z–potential of negative "polyamine CCK–M" with increased content of amino groups (a decline from –13.2 to –5.2 mV). Approximately also reduces ζ–potential "Ultrafiks P–127", but, by comparison, has a greater influence polyDADMAC. All other HVV alone and in combination ζ–potential is lowered only (–) 3.4 mV, except combinations "Polyamine CCK–M" + 50 g/t A–PAM.
The introduction of chemicals in most cases improved physical and mechanical properties, except for systems with PPE–1 resistance to bursting. CCK polyamine additive increases bursting resistance at all doses, ranging from small, the growth rate is observed. M CCK–polyamine gives effect at dosages of 1,0–1,5 kg/t polyDADMAC increases the burst strength at high flow rates.
Increased breaking length gives additive polyamine SSC, SSC polyamine–M. Efficiency increase in the number of falls: CCK polyamine, polyamine CCK–M Ultrafiks P–127, polyDADMAC, PPE–1, which is most clearly manifested at a rate of about 1 kg/t.
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References
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