Process for adding superabsorbent to a pre-formed fibrous web using two polymer precursor streams

A process for making an absorbent fibrous web composite, comprising the steps of:

• providing a first superabsorbent polymer precursor composition including a monomer;
• providing a second superabsorbent polymer precursor composition including a polymerization initiator;
• providing a pre-formed fibrous web including a plurality of fibers;
• adding the first superabsorbent polymer precursor composition to the fibrous web;
• separately adding the second superabsorbent polymer precursor composition to the fibrous web, whereupon the second superabsorbent polymer precursor composition comes into contact with the first superabsorbent polymer precursor composition;
• and
• chemically reacting the first and second superabsorbent polymer precursor compositions on or in the fibrous web to form a superabsorbent polymer.

A process for making an absorbent nonwoven web composite, comprising the steps of:

• providing a pre-formed nonwoven web including about 25-100% by weight absorbent fibers and about 0-75% by weight thermoplastic fibers;
• providing a first superabsorbent polymer precursor composition;
• providing a second superabsorbent polymer precursor composition capable of chemically reacting with the first superabsorbent polymer precursor composition upon contact;
• adding the first superabsorbent polymer precursor composition to the nonwoven web in a dropwise fashion;
• separately adding the second superabsorbent polymer precursor composition to the nonwoven web in a dropwise fashion;
• and
• chemically reacting the first and second superabsorbent polymer precursor compositions on or in the nonwoven web to form a superabsorbent polymer.