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1. (WO1997018082) MULTILAYER HYDRODISINTEGRATABLE FILM
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/018082 International Application No.: PCT/US1996/018392
Publication Date: 22.05.1997 International Filing Date: 13.11.1996
Chapter 2 Demand Filed: 22.05.1997
IPC:
A61L 15/62 (2006.01) ,B32B 27/22 (2006.01)
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
62
Hydrosoluble or hydrodegradable materials
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
18
characterised by the use of special additives
22
using plasticisers
Applicants:
KIMBERLY-CLARK WORLDWIDE, INC. [US/US]; 401 North Lake Street Neenah, WI 54956, US
Inventors:
COHEN, Bernard; US
JAMESON, Lee, Kirby; US
GIPSON, Lamar, Heath; US
FAASS, Judith, Katherine; US
Agent:
HARPS, Joseph, P. ; Kimberly-Clark Worldwide, Inc. 401 North Lake Street Neenah, WI 54957-0349, US
Priority Data:
08/558,40416.11.1995US
Title (EN) MULTILAYER HYDRODISINTEGRATABLE FILM
(FR) PELLICULE MULTICOUCHE HYDRODESAGREGEABLE
Abstract:
(EN) The present invention is directed toward a multilayer film which includes a first surface layer and a second surface layer. The first surface layer is composed of materials which disintegrate when subjected to conditions present in conventional sewage systems. The second surface layer is formed from a material which is essentially inert to water, urine and other bodily fluids. Typically, the second surface layer is an extremely thin coating which provides a waterproofing effect. The multilayer film may be utilized as an outer cover in a wide variety of products such as, for example, disposable diapers and feminine care products such as sanitary napkins. In one desirable embodiment the multilayer film includes only these two layers so that the material may be flushed down a conventional toilet without clogging the sewage system because the first surface layer rapidly disintegrates in water leaving only the thin, gossamer second surface layer which can pass through the sewage system without adversely affecting it.
(FR) L'invention concerne une pellicule multicouche qui comprend une première couche de surface et une seconde couche de surface. La première couche de surface est à base de matériaux qui se désagrègent en rencontrant les conditions propres aux systèmes d'égouts classiques. La seconde couche de surface est en matière essentiellement inerte par rapport à l'eau, à l'urine et autres liquides organiques. Généralement, la seconde couche de surface est un revêtement extrêmement fin qui a la propriété d'être imperméable à l'eau. La pellicule multicouche peut être utilisée comme revêtement extérieur sur une large gamme de produits, à savoir par exemple: des couches jetables et des produits d'hygiène féminine tels que serviettes hygiéniques. Dans un mode de réalisation préféré, la pellicule multicouche est constituée uniquement des deux couches mentionnées, d'où la possibilité d'écoulement dans les chasses d'eau classiques sans risque d'encombrement du système d'égouts: en effet, la première couche de surface se désagrège rapidement dans l'eau, laissant uniquement la seconde couche de surface en fine gaze qui peut passer à travers le système sans effet néfaste.
Designated States: AL, AM, AT, AU, AZ, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IL, IS, JP, KE, KG, KP, KR, KZ, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, UZ, VN
African Regional Intellectual Property Organization (ARIPO) (KE, LS, MW, SD, SZ, UG)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
MXPA/a/1998/003924CA2235703AU1997010770