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. (WO1992009359) LARGE-PORE-DIAMETER POROUS HOLLOW YARN MEMBRANE OF POLYETHYLENE, PRODUCTION THEREOF, AND HYDROPHILIC POROUS HOLLOW YARN MEMBRANE OF POLYETHYLENE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1992/009359 International Application No.: PCT/JP1991/001638
Publication Date: 11.06.1992 International Filing Date: 28.11.1991
IPC:
B01D 67/00 (2006.01) ,B01D 69/02 (2006.01) ,B01D 69/08 (2006.01) ,B01D 71/26 (2006.01) ,B29C 55/00 (2006.01) ,D01D 5/247 (2006.01)
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
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
69
Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
02
characterised by their properties
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
69
Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
08
Hollow fibre membranes
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
71
Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
06
Organic material
26
Polyalkenes
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
D TEXTILES; PAPER
01
NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING
D
MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES, OR RIBBONS
5
Formation of filaments, threads, or the like
24
with a hollow structure; Spinnerette packs therefor
247
Discontinuous hollow structure or microporous structure
Applicants:
MITSUBISHI RAYON CO., LTD. [JP/JP]; 3-19, Kyobashi 2-chome Chuo-ku Tokyo 104, JP (AllExceptUS)
KAMO, Jun [JP/JP]; JP (UsOnly)
HIRAI, Takayuki [JP/JP]; JP (UsOnly)
TAKAHASHI, Hiroshi [JP/JP]; JP (UsOnly)
KONDO, kenji [JP/JP]; JP (UsOnly)
Inventors:
KAMO, Jun; JP
HIRAI, Takayuki; JP
TAKAHASHI, Hiroshi; JP
KONDO, kenji; JP
Agent:
WAKABAYASHI, Tadashi; 8th Floor 16th Kowa Bldg. 9-20, Akasaka 1-chome Minato-ku, Tokyo 107, JP
Priority Data:
2/32727928.11.1990JP
3/16235407.06.1991JP
Title (EN) LARGE-PORE-DIAMETER POROUS HOLLOW YARN MEMBRANE OF POLYETHYLENE, PRODUCTION THEREOF, AND HYDROPHILIC POROUS HOLLOW YARN MEMBRANE OF POLYETHYLENE
(FR) MEMBRANE EN POLYETHYLENE A FIL CREUX POREUX D'UN GRAND DIAMETRE DE PORE, SA PRODUCTION ET MEMBRANE EN POLYETHYLENE A FIL CREUX POREUX HYDROPHILE
Abstract:
(EN) A large-pore-diameter porous hollow yarn membrane of polyethylene, which has a layered structure wherein slit-shaped micropores surrounded by microfibrils arranged in the longitudinal direction of the filament and knots composed of stacked lamellae interconnect the inner and outer wall surfaces of the hollow filament and which has an average diameter of the micropore of more than 2 $g(m)m up to 10 $g(m)m as measured with a mercury porosimeter, a porosity of 75 to 95 %, and an air permeation rate of 8 x 105 l/m2.hr.0.5 atm or above. This membrane is produced by melt spinning polyethylene and subjecting the obtained unstretched yarn to annealing, cold stretching and hot stretching under specified conditions.
(FR) Membrane en polyéthylène à fil creux poreux à grand diamètre de pore, ladite membrane présente une structure stratifiée dans laquelle des micropores en forme de fentes entourés par de microfibrilles agencées dans le sens longitudinal du filament ainsi que des n÷uds composés de lamelles empilées relient entre elles les surfaces des parois intérieure et extérieure du filament creux, ladite membrane ayant un diamètre moyen de micropore supérieur à 2 $g(m)m allant jusqu'à 10 $g(m) mesuré à l'aide d'un porosimètre au mercure, une porosité comprise entre 75 et 95 %, ainsi qu'une vitesse de pénétration de l'air de 8 x 105 l/m2.h.0,5 atm ou plus. La production de cette membrane consiste à procéder au filage à chaud du polyéthylène puis à soumettre le fil non étiré obtenu au recuit, à l'étirage à chaud et à l'étirage à froid dans des conditions spécifiées.
Designated States: US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
EP0513390US5294338