Global Patent Index - EP 4321679 A3

EP 4321679 A3 20240619 - ARTIFICIAL LEATHER

Title (en)

ARTIFICIAL LEATHER

Title (de)

KUNSTLEDER

Title (fr)

CUIR ARTIFICIEL

Publication

EP 4321679 A3 20240619 (EN)

Application

EP 23190590 A 20230809

Priority

JP 2022129024 A 20220812

Abstract (en)

Provided is artificial leather which does not use organic solvents during the production process and thus has a low environmental impact, and which has no formation of wrinkles during three-dimensional molding. The artificial leather comprises a nonwoven fabric made of ultrafine fibers having a mean single fiber diameter of 0.3 µm to 7 µm, and water-dispersible polyurethane, wherein when the free induction decay (FID) signal in pulse NMR (solid echo method, proton observation, measuring temperature: 50°C) is fitted to two components: the S component (Gaussian component) and L component (Lorentz component), the spin-spin relaxation time Tl of the L component is 500 µsec to 800 µsec and the L component fraction Cl is 55% to 75%.

IPC 8 full level

D06P 3/14 (2006.01)

CPC (source: EP)

D06N 3/0004 (2013.01); D06N 3/0006 (2013.01); D06N 3/0011 (2013.01); D06N 3/0036 (2013.01); D06N 3/0052 (2013.01); D06N 3/0065 (2013.01); D06N 3/0072 (2013.01); D06N 3/0075 (2013.01); D06N 3/0088 (2013.01); D06N 3/146 (2013.01); D06N 2205/246 (2013.01); D06N 2209/0807 (2013.01); D06N 2211/28 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA

Designated validation state (EPC)

KH MA MD TN

DOCDB simple family (publication)

EP 4321679 A2 20240214; EP 4321679 A3 20240619; JP 2024025723 A 20240226

DOCDB simple family (application)

EP 23190590 A 20230809; JP 2023129216 A 20230808