Some content of this application is unavailable at the moment.
If this situation persist, please contact us atFeedback&Contact
1. (WO1997017393) GRANULATED POWDER OF POLYTETRAFLUOROETHYLENE FOR MOLDING AND PROCESS FOR THE PRODUCTION THEREOF
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/017393 International Application No.: PCT/JP1996/003238
Publication Date: 15.05.1997 International Filing Date: 05.11.1996
Chapter 2 Demand Filed: 16.05.1997
IPC:
B01J 2/12 (2006.01) ,B01J 2/14 (2006.01) ,C08J 3/12 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
J
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
2
Processes or devices for granulating materials, in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
12
in rotating drums
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
J
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
2
Processes or devices for granulating materials, in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
14
in rotating dishes or pans
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
J
WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
3
Processes of treating or compounding macromolecular substances
12
Powdering or granulating
Applicants:
DAIKIN INDUSTRIES, LTD. [JP/JP]; Umeda Centre Building 4-12, Nakazaki-nishi 2-chome Kita-ku Osaka-shi Osaka 530-0015, JP (AllExceptUS)
ASANO, Michio [JP/JP]; JP (UsOnly)
TANIGAWA, Shingo [JP/JP]; JP (UsOnly)
SHIMIZU, Tetsuo [JP/JP]; JP (UsOnly)
KAWACHI, Shoji [JP/JP]; JP (UsOnly)
Inventors:
ASANO, Michio; JP
TANIGAWA, Shingo; JP
SHIMIZU, Tetsuo; JP
KAWACHI, Shoji; JP
Agent:
ASAHINA, Sohta ; NS Building 2-22, Tanimachi 2-chome Chuo-ku, Osaka-shi Osaka 540, JP
Priority Data:
7/29117509.11.1995JP
Title (EN) GRANULATED POWDER OF POLYTETRAFLUOROETHYLENE FOR MOLDING AND PROCESS FOR THE PRODUCTION THEREOF
(FR) POUDRE GRANULEE DE POLYTETRAFLUOROETHYLENE POUR LE MOULAGE D'ARTICLES ET PROCESSUS DE PRODUCTION DE CETTE POUDRE
Abstract:
(EN) A granulated powder of polytetrafluoroethylene for molding which is lowered in the content of coarse particles; and a process for producing the granulated powder at a high tumbling efficiency while dispensing with the use of organic liquid. A process for producing a granulated powder of polytetrafluoroethylene for molding by tumbling powdered polytetrafluoroethylene in a granulator of inclined-disc and rotary-sidewall type, wherein the granulator is one having the following characteristics: (1) the granulator is composed of a disc inclined against the horizontal plane and a sidewall provided around the disc; (2) the sidewall is formed in a state integrated with the disc and is rotated integrally with the disc; and (3) an agitator is provided eccentrically to the vortex formed by the tumbling of powdered polytetrafluoroethylene or (1) the granulator is composed of a disc inclined against the horizontal plane and a sidewall provided around the disc; (2) the sidewall is formed separately from the disc and is rotated around the disc; and (3) an agitator is provided eccentrically to the vortex formed by the tumbling of powdered polytetrafluoroethylene, and the granulation of powdered polytetrafluoroethylene is conducted by tumbling it in a state wetted with an aqueous solution containing a surfactant.
(FR) Cette invention concerne une poudre granulée de polytetrafluoroéthylène destinée au moulage d'articles et possédant un contenu réduit en particules grossières, ainsi qu'un processus de production de cette poudre granulée permettant d'obtenir une grande efficacité de mélange sans avoir recours à un liquide organique. Ce processus de production d'une poudre granulée de polytetrafluoroéthylène destinée au moulage d'articles, consiste à mélanger du polytetrafluoroéthylène en poudre dans un granulateur de type disque incliné et à paroi latérale rotative, lequel granulateur possède les caractéristiques suivantes: (1) le granulateur se compose d'un disque incliné par rapport au plan horizontal, et d'une paroi latérale entourant le disque; (2) la paroi latérale fait partie intégrante du disque et tourne en même temps que ce dernier; et (3) le granulateur comporte un agitateur en position excentrique par rapport au tourbillon formé lors du mélange de polytetrafluoroéthylène. Dans un autre mode de réalisation, le granulateur possède les caractéristiques suivantes: (1) le granulateur se compose d'un disque incliné par rapport au plan horizontal, et d'une paroi latérale entourant le disque; (2) la paroi latérale et formée séparément par rapport au disque, et tourne autour de celui-ci; et (3) le granulateur comporte un agitateur en position excentrique par rapport au tourbillon formé lors du mélange de polytetrafluoroéthylène. La granulation du polytetrafluoroéthylène en poudre s'effectue en mélangeant ce dernier à l'état humide grâce à une solution aqueuse contenant un tensioactif.
Designated States: CN, JP, KR, US
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
EP0861866US5994499JP3239268CN1202184KR1019990067436