Toho Tenax America, Inc.   Toho Tenax America, Inc.
Pyromex® Spun Yarns

Pyromex® is a family of oxidized poly-[acrylonitrile] (PAN) fibers. These fibers have a Limiting Oxygen Index (L.O.I.) of between 50 - 60% oxygen, making Pyromex® much more flame resistant than many other organic fibers such as PBI® ( 41% ), Nomex® ( 30% ), or Kevlar® ( 28% ). For carbon/carbon applications, the low sodium content of these fibers may aid in processing and performance. Toho Tenax reserves the right to upgrade manufacturing processes and raw materials without notice, in compliance with our approach on oxidized PAN fiber product improvement.

Yarn Type CPY 1/20 CPY 1/11 CPY 2/11
Metric Count 20.0 11.3 5.65
Worsted Count 17.7 10.0 5.0
Number of Plys 1 1 2
Yield [g/m] 0.05 0.09 0.18
Twist: Singles [tpi] 10.6z ± 1.06 7.5z ± 0.75 7.5z ± 0.75
Twist: Plys [tpi] N/A N/A 5s ±1.5
Elongation [%] 8.0 Min 8.0 Min 8.0 Min
Break Strength 1.1 Min 2.0 Min 4.0 Min
Density [g/cm³] 1.41 ± 0.02
Moisture Regain [%] 9.0 ± 2.5
Standard Bobbin Size [kg] 1 2 1
Bobbins per Case 30 16 30
Weight of One Case [lb] 66.14 70.55 66.14
Conical Paper tube, 2½ ID X 3/4 ID X 7 inches, nominal
AMERICAS
Toho Tenax America, Inc.
121 Cardiff Valley Road
Rockwood
TN 37854-4134
Tel (800) 252-3001 or (865) 354-8408
http://www.tohotenaxamerica.com
ASIA
Toho Tenax Co., Ltd.
2-38-16 Hongo
Bunkyo-ku
Tokyo, 113-8404 Japan
Tel +81 (3) 5842-3695
http://www.tohotenax.com
EUROPE
Toho Tenax Europe GmbH
Kasinostraße 19-21
Wuppertal 42103
Germany
Tel +49 (202) 322339
http://www.tohotenax-eu.com
To the best of our knowledge, the information contained in this publication is accurate; however, we do not assume any liability whatsoever for the accuracy or completeness of such information. Moreover, there is a need to reduce human exposure to many materials to the lowest practical limits in view of possible long-term adverse effects. To the extent that any hazards may have been mentioned in the publication, we neither suggest nor guarantee that such hazards are the only ones which exist. Final determination of the suitability of any information or product for the use contemplated by any user, the manner of that use and whether there is any infringement of any patents is the sole responsibility of the user. We recommend that anyone intending to rely on any recommendation or to use any equipment, processing technique or material mentioned in this publication should satisfy himself as to such suitability and that he can meet all applicable safety and health standards. We strongly recommend that users seek and adhere to the manufacturers' or suppliers' current instruction for handling each material they use.
PLS 015 Rev D 05/03/07


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