Global Patent Index - EP 4269671 A1

EP 4269671 A1 20231101 - MICROFLUIDIC-BASED WET SPINNING OF INDIVIDUAL SOLID POLYMER FIBERS

Title (en)

MICROFLUIDIC-BASED WET SPINNING OF INDIVIDUAL SOLID POLYMER FIBERS

Title (de)

MIKROFLUIDISCHES NASSSPINNEN EINZELNER FESTER POLYMERFASERN

Title (fr)

FILAGE HUMIDE À BASE MICROFLUIDIQUE DE FIBRES POLYMÈRES SOLIDES INDIVIDUELLES

Publication

EP 4269671 A1 20231101 (EN)

Application

EP 22170061 A 20220426

Priority

EP 22170061 A 20220426

Abstract (en)

A method for producing an individual solid polymer fiber from a precursor liquid (L1) comprising polymerizable and/or cross-linkable polymer precursors by microfluidic-based wet spinning comprises the steps of: a) Introducing the precursor liquid (L1) into a first capillary tube (11) coaxially protruding into a second capillary tube (12); b) Producing a liquid fiber with core-shell structure in the second capillary tube (12); c) Optionally, injecting the liquid fiber with core-shell structure produced in step b) into a third capillary (13) tube to produce a fiber with core-shell-sheath structure; d) Guiding the liquid fiber with core-shell structure, optionally having a sheath, as produced in step b) or in step c) through a stationary liquid phase (SP); e) Curing the liquid sheet of the fiber with core-shell structure at least in one of steps c) and d) to provide a fiber having a liquid core (22) embedded in a cured shell (21); f) Collecting the fiber; g) After step f), solidifying the liquid core (22) of the fiber; h) Removing the cured shell (21) from the solid core (22') to obtain the solid polymer fiber.

IPC 8 full level

D01F 8/04 (2006.01); D01D 5/06 (2006.01); D01D 5/34 (2006.01); D01F 8/18 (2006.01)

CPC (source: EP)

D01D 5/06 (2013.01); D01D 5/34 (2013.01); D01F 8/04 (2013.01); D01F 8/18 (2013.01)

Citation (applicant)

Citation (search report)

  • [XAI] US 2012301963 A1 20121129 - TAKEUCHI SHOJI [JP], et al
  • [I] US 2013071948 A1 20130321 - TAKEUCHI SHOJI [JP], et al
  • [A] PHAM UYEN H T ET AL: "A microfluidic device approach to generate hollow alginate microfibers with controlled wall thickness and inner diameter", JOURNAL OF APPLIED PHYSICS, AMERICAN INSTITUTE OF PHYSICS, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747, vol. 117, no. 21, 7 June 2015 (2015-06-07), XP012197970, ISSN: 0021-8979, [retrieved on 19010101], DOI: 10.1063/1.4919361
  • [A] PENG LI ET AL: "Microfluidic fabrication of highly stretchable and fast electro-responsive graphene oxide/polyacrylamide/alginate hydrogel fibers", EUROPEAN POLYMER JOURNAL, PERGAMON PRESS LTD OXFORD, GB, vol. 103, 16 April 2018 (2018-04-16), pages 335 - 341, XP085396891, ISSN: 0014-3057, DOI: 10.1016/J.EURPOLYMJ.2018.04.019

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 MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

Designated validation state (EPC)

KH MA MD TN

DOCDB simple family (publication)

EP 4269671 A1 20231101; WO 2023209037 A1 20231102

DOCDB simple family (application)

EP 22170061 A 20220426; EP 2023061015 W 20230426