Patent · US Active

Water vapor-permeable composite material

US11739475B2 · kind B2 · utility

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14Claims

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Assignee

BASF SE

Inventors

Frank Prissok · Bohmte, DE
Juergen Ahlers · Groß-Rohrheim, DE
Amir Doroodian · Lemförde, DE
Michael Harms · Bohmte, DE

Key dates

Filing date	Aug 28, 2020
Grant date	Aug 29, 2023
Priority date	—
Expiry date	Aug 28, 2040

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD10B2501/04
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A composite material contains a nonwoven layer (i) which contains fibers formed from a first thermoplastic elastomer having meshes with a mesh size in the range from 10 to 100 μm, and a membrane layer (ii) which contains a second thermoplastic elastomer and having a layer thickness of less than 30 μm. The membrane is either pore-free (ii.1) or is porous and has pores with an average pore diameter of less than 2000 nm (ii.2). The membrane (ii) is at least partially in direct contact with the fibers of the nonwoven layer (i) and covers the mesh openings in the nonwoven layer (i) at least partially. The fibers of the first nonwoven layer (i) and the membrane (ii) in the contact area are at least partly joined to one another in an interlocking manner.

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