EP 4183918 A1 20230524 - METHOD FOR MANUFACTURING A THREE-DIMENSIONAL FORMED STRUCTURE IN POLYAMIDE TEXILES
Title (en)
METHOD FOR MANUFACTURING A THREE-DIMENSIONAL FORMED STRUCTURE IN POLYAMIDE TEXILES
Title (de)
VERFAHREN ZUR HERSTELLUNG EINER DREIDIMENSIONALEN GEFORMTEN STRUKTUR IN POLYAMIDTEXTIELIEN
Title (fr)
PROCÉDÉ DE FABRICATION D'UNE STRUCTURE FORMÉE TRIDIMENSIONNELLE DANS LES TEXTILES POLYAMIDES
Publication
Application
Priority
EP 21209577 A 20211122
Abstract (en)
Method for manufacturing a three-dimensional formed structure from a textile fabric, comprising the steps of(a) providing a textile fabric comprising polyamide;(b) contacting the textile fabric with a treatment solution wherein the treatment solution comprises a mixture of CaCl<sub>2</sub>, EtOH and H<sub>2</sub>O, wherein the CaCl<sub>2</sub> content is > 6 mol%, the EtOH content is < 25 mol%, the molar ratio between CaCl<sub>2</sub> : EtOH : H<sub>2</sub>O is between 1 : 0.6 - 2 : 3.4 - 7 and the H<sub>2</sub>O/EtOH molar ratio is > 2.5. for at least 1 second and at most 4 hours by immersion or for at least 1 s and at most 5 minutes by spraying;(c) squeezing of the treatment liquid from the fabrics to adjust the solvent content in the fabrics;(d) consolidating the textile fabric for 1 s to 60 minutes while the textile fabric is still containing the treatment solution by increasing the temperature of the textile fabric to a temperature of between 10 °C to 120 °C with the provision that the temperature is at least 100 °C below the melting point of the polyamide and by forming the textile fabric in the desired three-dimensional structure;(e) quenching the treatment solution while the formed textile fabric still contains treatment solution by adding water and/or by evaporating ethanol out from the fabric;(f) isolating the formed textile fabric followed by washing and drying.
IPC 8 full level
D06M 11/155 (2006.01); D06C 15/00 (2006.01); D06C 23/04 (2006.01); D06M 13/144 (2006.01); D06M 23/16 (2006.01); D06M 23/18 (2006.01); D06Q 1/08 (2006.01); E01C 11/14 (2006.01); F16B 13/00 (2006.01); F16B 13/14 (2006.01); D06M 101/34 (2006.01)
CPC (source: EP)
D06M 11/155 (2013.01); D06M 13/144 (2013.01); D06M 23/16 (2013.01); D06M 23/18 (2013.01); D06Q 1/08 (2013.01); D06C 23/00 (2013.01); D06M 2101/34 (2013.01)
Citation (applicant)
- EP 3378988 A1 20180926 - UNIV INNSBRUCK [AT]
- SUN ET AL.: "Study on the mechanism of nylon 66 dissolving process using CaCb/MeOFI as the solvent", CHIN. J. POLYM. SCI., 1994
- LI ET AL.: "Effect of Calcium Chloride on the Surface Properties of Kevlar Fiber", J. APPL. POLYM. SCI, 2015
- RIETZLER, B.T. BECHTOLDT. PHAM: "Spatial structure investigation of porous shell layer formed by swelling of PA66 fibres in CaCb/FbO/EtOFI mixtures", LANGMUIR, vol. 35, no. 14, 2019, pages 4902 - 4908
Citation (search report)
- [XI] GB 764088 A 19561219 - BRADFORD DYERS ASS LTD
- [A] GB 555490 A 19430825 - RONALD GEORGE BARTLETT, et al
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- [A] DD 239015 A1 19860910 - REICHSBAHN REICHSBAHNBAUDIREKT [DD]
- [A] DE 3225051 A1 19840105 - HILTI AG [LI]
- [A] DE 2650038 A1 19780503 - BAYER AG
- [A] JP S5795489 A 19820614 - ASAHI CHEMICAL IND
- [A] US 4861663 A 19890829 - SIRINYAN KIRKOR [DE], et al
- [AD] EP 3378988 A1 20180926 - UNIV INNSBRUCK [AT]
- [X] EP 1782768 A1 20070509 - MYCOAL PROD CORP [JP]
- [I] JP H02154074 A 19900613 - DYNIC CORP
- [A] GB 708815 A 19540512 - BRITISH NYLON SPINNERS LTD
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- [A] US 2738566 A 19560320 - SCOTT JR THOMAS P
- [A] GB 813289 A 19590513 - HEBERLEIN & CO AG
- [A] WO 0151697 A1 20010719 - MILLIKEN & CO [US]
- [A] DATABASE WPI Week 197745, 1977 Derwent World Patents Index; AN 1977-80548Y, XP002806218
- [A] DATABASE WPI Week 197628, 1976 Derwent World Patents Index; AN 1976-53351X, XP002806219
- [A] YAMAMOTO HIDEKI ET AL: "Development of a Regeneration Process for Nylon-6 and Nylon-6,6 from Felt Wastes", KAGAKU KOGAKU RONBUNSHU, 20 May 2013 (2013-05-20), pages 238 - 243, XP055912732, Retrieved from the Internet <URL:...> [retrieved on 20220413], DOI: 10.1252/kakoronbunshu.39.238
- [A] BARBARA RIETZLER ET AL: "Investigation of the decomplexation of polyamide/CaCl2 complex toward a green, nondestructive recovery of polyamide from textile waste", JOURNAL OF APPLIED POLYMER SCIENCE, JOHN WILEY & SONS, INC, US, vol. 138, no. 40, 20 May 2021 (2021-05-20), pages n/a, XP071309791, ISSN: 0021-8995, DOI: 10.1002/APP.51170
- [A] RIETZLER BARBARA ET AL: "Controlled Surface Modification of Polyamide 6.6 Fibres Using CaCl2/H2O/EtOH Solutions", POLYMERS, vol. 10, no. 2, 21 February 2018 (2018-02-21), CH, pages 1 - 14, XP055847660, ISSN: 2073-4360, DOI: 10.3390/polym10020207
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
DOCDB simple family (publication)
DOCDB simple family (application)
EP 21209577 A 20211122