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1. (WO1997016492) WATER ABSORBENT RESIN, ABSORBENT MATERIAL, AND PROCESS FOR THE PRODUCTION THEREOF
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/016492 International Application No.: PCT/JP1996/003191
Publication Date: 09.05.1997 International Filing Date: 31.10.1996
IPC:
A61F 13/15 (2006.01) ,A61L 15/60 (2006.01) ,C08J 3/075 (2006.01)
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
F
FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
13
Bandages or dressings; Absorbent pads
15
Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
L
METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
15
Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
16
Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
42
Use of materials characterised by their function or physical properties
60
Liquid-swellable gel-forming materials, e.g. super-absorbents
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
02
Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
03
in aqueous media
075
Macromolecular gels
Applicants:
NIPPON SHOKUBAI CO., LTD. [JP/JP]; 1-1, Koraibashi 4-chome Chuo-ku Osaka-shi Osaka 541, JP (AllExceptUS)
ISHIZAKI, Kunihiko [JP/JP]; JP (UsOnly)
OBARA, Hisanobu [JP/JP]; JP (UsOnly)
KITAYAMA, Toshimasa [JP/JP]; JP (UsOnly)
MOTONO, Yoshihiro [JP/JP]; JP (UsOnly)
HARADA, Nobuyuki [JP/JP]; JP (UsOnly)
Inventors:
ISHIZAKI, Kunihiko; JP
OBARA, Hisanobu; JP
KITAYAMA, Toshimasa; JP
MOTONO, Yoshihiro; JP
HARADA, Nobuyuki; JP
Agent:
HARA, Kenzo; Harakenzo Patent Law Firm Daiwa Minamimorimachi Building 2-6, Tenjinbashi 2-chome Kita Kita-ku, Osaka-shi Osaka 530, JP
Priority Data:
7/28626602.11.1995JP
8/27091714.10.1996JP
Title (EN) WATER ABSORBENT RESIN, ABSORBENT MATERIAL, AND PROCESS FOR THE PRODUCTION THEREOF
(FR) RESINE ABSORBANT L'EAU, MATIERE ABSORBANTE ET PROCEDE DE PRODUCTION
Abstract:
(EN) A sheetlike absorbent material is produced by reducing the water content of a hydrogel of a hydrophilic cross-linked polymer under pressing (milling) and feeding. A gel composition comprising, for example, a hydrogel containing a cross-linked poly(meth)-acrylic acid (salt), glycerol (polyhydric alcohol), and polyester fibers (molding assistant) onto a dryer drum on the upperstream side of a press roller, whereby the gel composition is pressed (milled) and heated by the press roller to give a sheet with at least one surface thereof smoothed. The absorbent material produced by the above process is excellent particularly in absorption characteristics such as absorption speed and absorption factor under pressure and shape retention.
(FR) La présente invention concerne la production d'une matière absorbante, sous une forme analogue à une feuille, par réduction de la teneur en eau d'un hydrogel d'un polymère réticulé hydrophile subissant une pression et une avance. L'invention concerne aussi une composition de gel comportant, par exemple, un hydrogel contenant un (sel d') acide poly(méth)acrylique réticulé, du glycérol (alcool polyhydrique) et des fibres de polyester (auxiliaire de moulage), placée sur un tambour de séchage, du côté amont d'un rouleau presseur. Cette composition de gel est pressée et chauffée par le rouleau presseur pour donner une feuille dont au moins une surface est lissée. La matière absorbante produite selon ce procédé est excellente en particulier par ses caractéristiques d'absorption telles que la vitesse d'absorption et le taux d'absorption sous pression ainsi que le maintien de la forme.
Designated States: 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:
EP0802238US6001911