Document ID: chunk:federal_register_of_legislation:F2024L01024:front:0:p78
Version: federal_register_of_legislation:F2024L01024
Segment Type: other
Provision Reference: 
Character Range: 223239–226139

temperature (Tg)' is determined using the method described in ISO 11357-2 (1999) or national equivalents.
2. For the purposes of 1C008.a.2. thermosetting materials and 1C008.a.3. materials, the 'glass transition temperature (Tg)' is determined using the 3- point bend method described in ASTM D 7028-07 or equivalent national standard. The test is to be performed using a dry test specimen which has attained a minimum of 90% degree of cure as specified by ASTM E 2160-04 or equivalent national standard, and was cured using the combination of standard- and post-cure processes that yield the highest Tg.
1. C. 009. Unprocessed fluorinated compounds as follows:
a. Not used;
b. Fluorinated polyimides containing 10% by weight or more of combined fluorine;
c. Fluorinated phosphazene elastomers containing 30% by weight or more of combined fluorine.

1. C. 010. "Fibrous or filamentary materials" as follows:
N.B.: SEE ALSO 1C210 AND 9C110.
Technical Notes:
           1. For the purposes of calculating "specific tensile strength", "specific modulus" or specific weight of "fibrous or filamentary materials" in 1C010.a., 1C010.b., 1C010.c. or 1C010.e.1.b., the tensile strength and modulus should be determined by using Method A described in ISO 10618 (2004) or national equivalents.
           2. For the purposes of assessing the "specific tensile strength", "specific modulus" or specific weight of non-unidirectional "fibrous or filamentary materials" (e.g., fabrics, random mats or braids) in 1C010., this is to be based on the mechanical properties of the constituent unidirectional monofilaments (e.g., monofilaments, yarns, rovings or tows) prior to processing into the non-unidirectional "fibrous or filamentary materials".

1. C. 010. a. Organic "fibrous or filamentary materials", having all of the following:
1. A "specific modulus" exceeding 12.7 x 106 m; and
2. A "specific tensile strength" exceeding 23.5 x 104 m;
Note: 1C010.a. does not apply to polyethylene.
1. C. 010. b. Carbon "fibrous or filamentary materials", having all of the following:
1. "Specific modulus" exceeding 14.65 x 106 m; and
2. "Specific tensile strength" exceeding 26.82 x 104 m;
Note: 1C010.b. does not apply to:
a. "Fibrous or filamentary materials", for the repair of "civil aircraft" structures or laminates, having all of the following:
1. An area not exceeding 1 m2;
2. A length not exceeding 2.5 m; and
3. A width exceeding 15 mm.
b. Mechanically chopped, milled or cut carbon "fibrous or filamentary materials" 25.0 mm or less in length.
1. C. 010. c. Inorganic "fibrous or filamentary materials", having all of the following:
1. Having any of the following:
a. Composed of 50% or more by weight silicon dioxide and having a "specific modulus" exceeding 2.54 x 106 m; or
b. Not specified in 1C010.c.1.a. and having a "specific modulus" exceeding 5.6 x 106 m; and
2. Melting, softening, decomposition or