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1. (WO2003056088) METHOD FOR PREPARING HIGH BULK COMPOSITE SHEETS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2003/056088    International Application No.:    PCT/US2002/040402
Publication Date: 10.07.2003 International Filing Date: 17.12.2002
Chapter 2 Demand Filed:    17.07.2003    
IPC:
D04H 1/06 (2012.01), D04H 1/50 (2012.01), D04H 1/54 (2012.01), D04H 3/02 (2006.01), D04H 3/14 (2012.01)
Applicants: INVISTA TECHNOLOGIES S.à.r.l. [US/US]; Intellectual Property Record Center, 4417 Lancaster Pike, CRP 722/1032, Wilmington, DE 19805 (US)
Inventors: ZAFIROGLU, Dimitri, P.; (US).
HIETPAS, Geoffrey, David; (US)
Agent: STRICKLAND, Frederick, D.; E. I. Du Pont De Nemours and Company, Legal Patent Records Center, 4417 Lancaster Pike, Wilmington, DE 19805 (US)
Priority Data:
60/343,322 21.12.2001 US
Title (EN) METHOD FOR PREPARING HIGH BULK COMPOSITE SHEETS
(FR) PROCEDE DE PRODUCTION DE FEUILLES COMPOSITES A COEFFICIENT DE GONFLEMENT ELEVE
Abstract: front page image
(EN)This invention relates to a method for preparing nonwoven fabrics having an improved balance of properties in the machine and cross-directions. More specifically, the invention utilizes nonwoven webs that include relatively low levels of multiple-component fibers having latent three-dimensional spiral crimp combined with fibers that do not develop spiral crimp. The latent spiral crimp of the multiple-component fibers is activated, such as by heating, under free shrinkage conditions, after formation of the nonwoven web to achieve re-orientation of the non-spirally-crimpable fibers and an improved balance of properties such as tensile strength and modulus.
(FR)Cette invention a trait à un procédé de production de textiles non-tissés dont l'équilibre entre les propriétés dans le sens machine et le sens travers a été amélioré. Elle porte, plus précisément, sur l'utilisation de bandes non-tissés contenant des concentrations relativement peu élevées de fibres à multi-composants à ondulation latente en spirale tridimensionnelle en association avec des fibres sans ondulation. On favorise cette ondulation latente en spirale des fibres à multi-composants, notamment par chauffage, dans des conditions de retrait libre et ce, après formation de la bande non-tissée afin de réorienter les fibres n'ondulant pas en spirale et de mieux équilibrer les propriétés des fibres, notamment leur contrainte de rupture ainsi que leur module d'élasticité en traction.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, OM, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, TJ, TM, TN, TR, TT, TZ, UA, UG, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)