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

To provide a pitch inhibitor for a paper and pulp production process, having excellent pitch deposition prevention effect for a paper manufacturing equipment such as wire, felt, rolls, etc., and preventing process troubles such as reduction of dewatering performance of the wire and the felt, etc., and a pitch inhibition method of the proces.SOLUTION: Disclosed herein are: a pitch inhibitor for a paper and pulp production process containing a specified cationic polymer having a mass average molecular of 10,000 or more and 25,000 or under, a nonionic surfactant, and a phosphonic acid compound as an active ingredient; and a pitch inhibition method for a paper and pulp production process for inhibition of pitch soils containing a step of adding the pitch inhibitor to a paper and pulp production process water.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２５，０００以下の特定のカチオン性ポリマー、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