| (19) |
 |
|
(11) |
EP 0 819 788 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
02.02.2000 Bulletin 2000/05 |
| (43) |
Date of publication A2: |
|
21.01.1998 Bulletin 1998/04 |
| (22) |
Date of filing: 14.07.1997 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
Designated Extension States: |
|
SI |
| (30) |
Priority: |
15.07.1996 DE 19628477
|
| (71) |
Applicant: ISOVER SAINT-GOBAIN |
|
92400 Courbevoie (FR) |
|
| (72) |
Inventors: |
|
- Amannt, Gerald
69259 Wilhelmsfeld (DE)
- Holstein, Wolfang, Dr.
35315 Homburg (DE)
|
| (74) |
Representative: R.A. KUHNEN & P.A. WACKER |
|
Patentanwaltsgesellschaft mbH Alois-Steinecker-Strasse 22
85354 Freising
85354 Freising (DE) |
|
| |
|
| (54) |
Needling aid for producing needle felts, a needle felt produced by using it, and a
method for production thereof |
(57) The present invention concerns a needle felt of mineral wool, in particular glass
wool, which even at elevated temperatures does not release any toxic products, in
particular no formaldehyde, into the surrounding atmosphere and therefore has optimum
suitability for use as a heat insulating material in household appliances such as
ovens or cookers. Freeness from formaldehyde of the needle felt results from utilisation
of a novel needling aid on the basis of halogenated polymers, in particular fluorated
polymers.