High tenacity, low flammability polyester yarn, production thereof and use thereof
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Aug 19, 1997
Grant Date -
N/A
app pub date -
Dec 21, 1994
filing date -
Dec 27, 1993
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention provides a flammability multifilament yarn comprising a polyester formed from dicarboxylic acid and diol components which contains, in the polymer chain, units of the formula I ##STR1## where R is a saturated open-chain or cyclic alkylene, arylene or aralkylene radical, and R.sup.1 is an alkyl radical of up to 6 carbon atoms or an aryl or aralkyl radical, wherein the yarn has a tenacity of at least 65 cN/tex, a total burn time, when made into a loomstate cloth and subjected to the flammability test of DIN 4102/B2, which is at least 5 times shorter than that of a comparable loomstate cloth composed of non-phosphorus-modified polyester, and wherein the yarn has no afterburning on 3 and 15 sec flaming according to DIN 54336 and 3 sec flaming according to DIN 54333.
First Claim
Other Claims data not available
Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| DE | A1 | DE4344691 | Dec 27, 1993 |
| EP | B1 | EP0661393 | Dec 16, 1994 |
| CA | C | CA2138465 | Dec 19, 1994 |
| BR | A | BR9405273 | Dec 27, 1994 |
| JP | A | JPH07229021 | Dec 27, 1994 |
International Classification(s)
- 1994 Application Filing Year
- B29C Class
- 1214 Applications Filed
- 593 Patents Issued To-Date
- 48.85 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 9 Citation Count
- B29C Class
- 3.92 % this patent is cited more than
- 28 Age