Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO1998051474) IMPROVED METHODS OF MAKING STRETCHED FILLED MICROPOROUS FILMS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/051474 International Application No.: PCT/US1998/007349
Publication Date: 19.11.1998 International Filing Date: 14.04.1998
Chapter 2 Demand Filed: 14.10.1998
IPC:
B29C 55/06 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
55
Shaping by stretching, e.g. drawing through a die; Apparatus therefor
02
of plates or sheets
04
uniaxial, e.g. oblique
06
parallel with the direction of feed
Applicants:
KIMBERLY-CLARK WORLDWIDE, INC. [US/US]; 401 North Lake Street Neenah, WI 54956, US
Inventors:
JONES, Billy, Ray, Jr.; US
JACOBS, Rob, Lee; US
WILSON, Tracy, Neal; US
Agent:
TULLEY, Douglas, H. ; Kimberly-Clark Worldwide, Inc. 401 North Lake Street Neenah, WI 54956, US
Priority Data:
08/854,46012.05.1997US
Title (EN) IMPROVED METHODS OF MAKING STRETCHED FILLED MICROPOROUS FILMS
(FR) PROCEDE AMELIORE DE FABRICATION DE FILMS MICROPOREUX ETIRES CHARGES
Abstract:
(EN) Breathable barriers, comprising a thermoplastic polymer and at least 30 % by weight filler, are stretched in one direction in multiple discrete steps wherein the strain rate of each discrete stretching step is less than about 100,000 %/minute and wherein the line speed of the last stretching step is in excess of 500 feet per minute. The resulting films may be stretched, as a result of the cumulative discrete stretching operations, from about 2 to 7 times its original length in order to create a breathable barrier having a WVTR in excess of 800 g/m2/day and a hydrohead of at least 60 cm.
(FR) L'invention porte sur des barrières respirante faites d'un polymère thermoplastique, et d'une charge représentant au moins 30 % du poids, étirées dans un sens par pas successifs, le taux d'application des contraintes par pas étant de moins de 100.000 % à la minute, et la vitesse de défilement en fin d'étirage étant de plus de 500 pieds à la minute. Le film résultant, obtenu par l'accumulation des pas successifs et pouvant atteindre de 2 à 7 fois sa longueur d'origine, constitue une barrière respirante présentant un taux de transmission de la vapeur d'eau de plus de 800 g/m2/jour et une colonne d'eau d'au moins 60 cm.
front page image
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
MXPA/a/1999/009988US6179939CA2285311AU1998071118