| (19) |
 |
|
(11) |
EP 0 353 013 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
09.01.1991 Bulletin 1991/02 |
| (43) |
Date of publication A2: |
|
31.01.1990 Bulletin 1990/05 |
| (22) |
Date of filing: 25.07.1989 |
|
|
| (84) |
Designated Contracting States: |
|
CH DE ES FR GB IT LI NL SE |
| (30) |
Priority: |
26.07.1988 GB 8817728
|
| (71) |
Applicants: |
|
- UNILEVER PLC
London EC4P 4BQ (GB)
GB
- UNILEVER N.V.
NL-3013 AL Rotterdam (NL)
CH DE ES FR IT LI NL SE
|
|
| (72) |
Inventors: |
|
- Edwards, Keith Andrew
Wirral
Merseyside L63 5JT (GB)
- Leng, Christine Ann
Wirral
Merseyside (GB)
- Sams, Philip John
Willaston
South Wirral LL4 1TB (GB)
|
| (74) |
Representative: Ford, Michael Frederick et al |
|
MEWBURN ELLIS
York House
23 Kingsway
London WC2B 6HP
London WC2B 6HP (GB) |
|
| |
|
(57) A wiping article consists of two porous substrate layers sandwiching surfactant.
The surfactant is chosen so that its properties retard its release when the article
is wet and squeezed, hence avoiding initial excess foaming and lengthening the number
of times that a foaming solution of surfactant can be squeezed from the article. The
surfactant is chosen to have a Krafft temperature above 20°C and/or form a liquid
crystalline phase at temperatures above its Krafft temperature up to 30°C preferably
up to 50°C.