| (19) |
 |
|
(11) |
EP 0 336 464 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
30.05.1990 Bulletin 1990/22 |
| (43) |
Date of publication A2: |
|
11.10.1989 Bulletin 1989/41 |
| (22) |
Date of filing: 03.03.1989 |
|
| (51) |
International Patent Classification (IPC)4: D04H 1/42 |
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE ES FR GB GR IT LI NL SE |
| (30) |
Priority: |
04.03.1988 US 163923
|
| (71) |
Applicant: THE DOW CHEMICAL COMPANY |
|
Midland,
Michigan 48640 (US) |
|
| (72) |
Inventors: |
|
- McCullough, Francis P., Jr.
Lake Jackson
Texas 77566 (US)
- Snelgrove, Vernon R.
Damon
Texas 77430 (US)
- Goswami, Bhuvenesh C.
Clemson
South Carolina 29631 (US)
|
| (74) |
Representative: Smulders, Theodorus A.H.J., Ir. et al |
|
Vereenigde Octrooibureaux
Nieuwe Parklaan 97
2587 BN 's-Gravenhage
2587 BN 's-Gravenhage (NL) |
|
| |
|
| (54) |
Densified carbonaceous fiber structures |
(57) A fibrous structure comprising a multiplicity of nonflammable, nonlinear, substantially
irreversibly heat-set, first carbonaceous polymeric fibers, and at least one second
nonflammable carbonaceous polymeric fiber, yarn or tow in an interlocking relationship
with said first fibers; the fibrous structure is preferably densified and has a bulk
density of from 4.8 to 32 kg/m³, and a process for producing the interlocked, fibrous
structure useful as a thermal insulating and/or sound absorbing structure.