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1. (WO2017138916) FILTRATION MATERIAL HAVING ePTFE AND METHOD OF MAKING
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2017/138916 International Application No.: PCT/US2016/017031
Publication Date: 17.08.2017 International Filing Date: 08.02.2016
IPC:
B29K 27/18 (2006.01) ,B29C 55/12 (2006.01) ,B01D 67/00 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
K
INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D103
27
Use of polyvinylhalogenides as moulding material
12
containing fluorine
18
PTFE, i.e. polytetrafluorethene
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
10
multiaxial
12
biaxial
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
67
Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
Applicants:
CHOI, Kyung-Ju [US/US]; US
Inventors:
CHOI, Kyung-Ju; US
Agent:
WITTERS, Steve; US
Priority Data:
Title (EN) FILTRATION MATERIAL HAVING ePTFE AND METHOD OF MAKING
(FR) MATÉRIAU DE FILTRATION COMPRENANT DE L'EPTFE ET SON PROCÉDÉ DE FABRICATION
Abstract:
(EN) Disclosed herein is filtration material having expanded polytetrafluoroethylene (ePTFE) and method of making. The method comprises expanding polytetrafluoroethylene in a machine direction orienter (MDO) and expanding or stretching to a ratio from about 20:1 up to about 100:1. The sheet of polytetrafluoroethylene is then relaxed. Upon relaxing the sheet of polytetrafluoroethylene, the sheet of polytetrafluoroethylene is fed into a transverse direction orienter (TDO). The temperature of the sheet of polytetrafluoroethylene in TDO is maintained to remain below 200° C. The sheet of polytetrafluoroethylene is then expanded or stretched to a ratio from about 1.5:1 up to about 100:1, with the TDO, thus providing the expanded polytetrafluoroethylene of the present disclosure having increased tensile strength and finer filaments.
(FR) L'invention concerne un matériau de filtration comprenant du polytétrafluoroéthylène expansé (ePTFE) et son procédé de fabrication. Le procédé comprend l'expansion du polytétrafluoroéthylène dans un dispositif d'orientation dans le sens machine (MDO) et l'expansion ou l'étirage jusqu'à un rapport d'environ 20:1 à environ 100:1. La feuille de polytétrafluoroéthylène est ensuite relâchée. Après relâchement de la feuille de polytétrafluoroéthylène, la feuille de polytétrafluoroéthylène est introduite dans un dispositif d'orientation dans le sens transversal (TDO). La température de la feuille de polytétrafluoroéthylène dans le TDO est maintenue pour rester au-dessous de 200 °C. La feuille de polytétrafluoroéthylène est ensuite expansée ou étirée à un rapport d'environ 1,5:1 jusqu'à environ 100:1 avec le TDO, fournissant ainsi le polytétrafluoroéthylène expansé selon la présente invention ayant une résistance à la traction accrue et des filaments plus fins.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
KR1020180111983US20180326361