Patent · US Active

Absorbent articles comprising surface cross-linked superabsorbent polymer particles made by a method using vacuum ultraviolet radiation

US7576138B2 · kind B2 · utility

6Cited by

17References

13Claims

0Family size

Assignee

The Procter & Gamble Company · US

Inventors

Andreas Flohr · Kronberg, DE
Torsten Lindner · Schwalbach am Taunus, DE
Esther Oliveros · Barbelroth, DE
Yoshiro Mitsukami · Himeji, JP

Key dates

Filing date	Aug 23, 2006
Grant date	Aug 18, 2009
Priority date	—
Expiry date	Sep 1, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2991
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A method of surface cross-linking superabsorbent polymer particles using UV irradiation is provided. The method is carried out in a so-called drum reactor, which comprises a hollow drum and an irradiation source. The drum has a longitudinal axis and a cross-section. Superabsorbent polymer particles are fed into the drum and are irradiated while they move within the drum, which is rotated around its longitudinal axis. The irradiation source is provided such that the radiation emitted by the irradiation source is able to reach superabsorbent polymer particles within said drum. The irradiation source for use in the method is able to emit UV radiation of a wavelength between about 100 nm and about 200 nm.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.