PITCH SUPPRESSANT FOR PAPER/PULP MANUFACTURING PROCESS AND PITCH SUPPRESSION METHOD FOR PAPER/PULP MANUFACTURING PROCESS

To provide a pitch suppressant for a paper/pulp manufacturing process that has excellent effect of preventing the adhesion of pitch to manufacturing equipment of a wire, felt, a roll and the like in the paper/pulp manufacturing process, and prevents process troubles such as reduction of water squeezing properties of the wire or felt, and a pitch suppression method for the process.SOLUTION: A pitch suppressant for a paper/pulp manufacturing process contains an epichlorohydrin-ammonia-dialkyl amine copolymer having a mass average molecular weight of 10,000 or more and 100,000 or less, a nonionic surfactant, and a phosphonic acid compound as active ingredients, and a pitch suppression method in the paper/pulp manufacturing process in which the pitch suppressant is added to water in the paper/pulp manufacturing process to suppress pitch stain.SELECTED DRAWING: None 【課題】紙・パルプ製造工程において、ワイヤー、フェルト、ロール等の紙製造設備へのピッチ付着防止効果に優れ、ワイヤーやフェルトの窄水性の低下等の工程トラブルを防止する紙・パルプ製造工程用ピッチ抑制剤およびその工程のピッチ抑制方法を提供する。【解決手段】質量平均分子量１０，０００以上１００，０００以下のエピクロロヒドリン−アンモニア−ジアルキルアミン共重合体、非イオン界面活性剤、およびホスホン酸化合物を有効成分として含有する紙・パルプ製造工程用ピッチ抑制剤、およびこのピッチ抑制剤を紙・パルプ製造工程水に添加してピッチ汚れを抑制する紙・パルプ製造工程のピッチ抑制方法である。【選択図】なし