PITCH INHIBITOR FOR PAPER AND PULP MANUFACTURING PROCESS AND PITCH INHIBITION METHOD FOR PAPER AND PULP MANUFACTURING PROCESS

To provide a pitch inhibitor and a pitch inhibition method for a paper and pulp manufacturing process excellent in a prevention effect of dirt adhesion such as pitch to a paper manufacturing equipment including wire, felt and roll without a process trouble such as a deterioration of hydrophobicity of wire and felt in the paper and pulp manufacturing process.SOLUTION: A pitch inhibitor for a paper and pulp manufacturing process includes a nonionic surfactant, a phosphonic acid compound, an organic sulfonic acid compound, and an epichlorohydrin-ammonia-dialkyl amine copolymer or a diallyl dialkyl ammonium chloride acrylamide copolymer as effective components. The pitch inhibition method for the paper and pulp manufacturing process includes addition of these pitch inhibitors to a paper and pulp manufacturing process water to suppress stains such as a pitch.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等の汚れ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】非イオン界面活性剤、ホスホン酸化合物、有機スルホン酸化合物、さらに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あるいはジアリルジアルキルアンモニウムクロライド−アクリルアミド共重合体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、およびこれら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等の汚れを抑制する紙・パルプ製造工程のピッチ抑制方法である。【選択図】なし