A method for forming a dispersible nonwoven substrate comprising the steps of: a) emulsion polymerizing at least one mono-ethylenically unsaturated monomer an emulsion polymer； and b) neutralizing the emulsion polymer with a neutralizer selected from the group consisting of an amine having a pKb of 4 to7, an alkali hydroxide, and combinations thereof to form the aqueous nonwoven binder； c) contacting a nonwoven substrate with said aqueous nonwoven binder to form a contacted nonwoven substrate； d) heating the contacted nonwoven substrate to a temperature of from 120℃ to 220℃ to form a heated contacted nonwoven substrate； and e) immersing the contacted heated nonwoven substrate in an aqueous medium having a final pH of less than 5.5 to provide a dispersible nonwoven substrate wherein the aqueous medium contains a buffer comprising a mixture of citric acid and sodium citrate is disclosed.本發明揭示一種形成可分散的非編織基材之方法，其包括以下步驟：a)將至少一種單烯系不飽和單體乳液聚合成乳液聚合物；以及b)用選自由以下組成之群的中和劑中和所述乳液聚合物：pKb為4至7的胺、鹼金屬氫氧化物及其組合，以形成水性非編織黏合劑；c)使非編織基材與所述水性非編織黏合劑接觸，以形成經接觸非編織基材；d)將所述經接觸非編織基材加熱至120℃至220℃之溫度，以形成經加熱經接觸非編織基材；以及e)將所述經接觸經加熱非編織基材浸沒在最終pH小於5.5之水性介質中，以得到可分散的非編織基材，其中所述水性介質含有包括檸檬酸及檸檬酸鈉之混合物的緩衝劑。
