Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO2007003085) A PROCESS FOR PREPARING A MICROPOROUS POLYOLEFIN MEMBRANE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/003085 International Application No.: PCT/CN2006/000641
Publication Date: 11.01.2007 International Filing Date: 11.04.2006
IPC:
B29C 55/12 (2006.01) ,B32B 27/32 (2006.01) ,B32B 37/00 (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
10
multiaxial
12
biaxial
B PERFORMING OPERATIONS; TRANSPORTING
32
LAYERED PRODUCTS
B
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
27
Layered products essentially comprising synthetic resin
32
comprising polyolefins
B PERFORMING OPERATIONS; TRANSPORTING
32
LAYERED PRODUCTS
B
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
37
Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
Applicants:
BYD COMPANY LIMITED [CN/CN]; Yan An Road, Kuichong Longgang Shenzhen Guangdong 518119, CN (AllExceptUS)
LUO, Mingjun [CN/CN]; CN (UsOnly)
YOU, Zhen [CN/CN]; CN (UsOnly)
LIU, Huiquan [CN/CN]; CN (UsOnly)
HE, Yifan [CN/CN]; CN (UsOnly)
ZHANG, Wei [CN/CN]; CN (UsOnly)
LIAO, Kaiming [CN/CN]; CN (UsOnly)
Inventors:
LUO, Mingjun; CN
YOU, Zhen; CN
LIU, Huiquan; CN
HE, Yifan; CN
ZHANG, Wei; CN
LIAO, Kaiming; CN
Agent:
RUNPING & PARTNERS; Suite 509, Yingu Mansion No. 9 Beisihuanxilu, Haidian District Beijing 100080, CN
Priority Data:
200510035680.130.06.2005CN
Title (EN) A PROCESS FOR PREPARING A MICROPOROUS POLYOLEFIN MEMBRANE
(FR) PROCEDE DE PREPARATION D'UNE MEMBRANE POLYOLEFINIQUE MICROPOREUSE
Abstract:
(EN) A process for preparing a microporous polyolefin membrane comprises stretching a thick sheet comprising a polyolefin resin and a solvent to a thin membrane by a bi-oriented stretch, wherein said bi-oriented stretch is a sequential bi-oriented stretch comprising a machine direction stretch followed by a transverse direction stretch and the transverse direction stretch ratio is over 1.3 times of the machine direction stretch ratio. The microporous polyolefin membrane prepared by the process of the present invention possesses good ventilation property and high tensile strength.
(FR) L'invention concerne un procédé de préparation d'une membrane polyoléfinique microporeuse comprenant l'étirage bidirectionnel d'une feuille épaisse comprenant une résine polyoléfinique et un solvant, de manière à obtenir une fine membrane, ledit étirage bidirectionnel étant effectué de manière séquentielle et comprenant un étirage en direction machine, suivi d'un étirage en direction transversale, le rapport d'étirage en direction transversale étant plus de 1,3 fois le rapport d'étirage en direction machine. La membrane polyoléfinique microporeuse préparée par le procédé selon la présente invention présente de bonnes propriétés de ventilation et une résistance à la traction élevée.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, 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, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, 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)