Patent · US Expired

Absorbent structure and method for producing the same

US7462754B2 · kind B2 · utility

31Cited by

15References

10Claims

0Family size

Assignee

PAUL HARTMANN AG · DE

Inventors

Krzysztof D. Malowaniec · Heidenheim, DE
Rainer Mangold · Tauberbischofsheim, DE
Thomas Wurster · Heidenheim, DE

Key dates

Filing date	Aug 8, 2005
Grant date	Dec 9, 2008
Priority date	—
Expiry date	Sep 14, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2457
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A method for producing an absorbent structure and the resulting absorbent structure. The method includes the steps of introducing a thermoplastic polymer into an extrusion apparatus, melting the thermoplastic polymer material having a moisture content of at least 0.5 percent by weight into the extrusion apparatus, and extruding the mixture such that the fluid in the superabsorbent polymer material evaporates as pressure is released and induces foaming of the thermoplastic polymer that bonds the particulate polymer material together to create a matrix.

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