Document ID: chunk:federal_register_of_legislation:F2024L01024:front:0:p79
Version: federal_register_of_legislation:F2024L01024
Segment Type: other
Provision Reference: 
Character Range: 225908–228824

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 sublimation point exceeding 1,922 K (1,649°C) in an inert environment;
Note: 1C010.c. does not apply to:
a. Discontinuous, multiphase, polycrystalline alumina fibres in chopped fibre or random mat form, containing 3% by weight or more silica, with a "specific modulus" of less than 10 x 106 m;
b. Molybdenum and molybdenum alloy fibres;
c. Boron fibres;
d. Discontinuous ceramic fibres with a melting, softening, decomposition or sublimation point lower than 2,043 K (1,770°C) in an inert environment.
1. C. 010. d. "Fibrous or filamentary materials", having any of the following:
1. Composed of any of the following:
a. Polyetherimides specified by 1C008.a.; or
b. Materials specified by 1C008.d. to 1C008.f.; or
2. Composed of materials specified by 1C010.d.1.a. or 1C010.d.1.b. and 'commingled' with other fibres specified by 1C010.a., 1C010.b. or 1C010.c.;
Technical Note:
For the purposes of 1C010.d.2., 'commingled' is filament to filament blending of thermoplastic fibres and reinforcement fibres in order to produce a fibre reinforcement "matrix" mix in total fibre form.
1. C. 010. e. Fully or partially resin‑impregnated or pitch‑impregnated "fibrous or filamentary materials" (prepregs), metal or carbon‑coated "fibrous or filamentary materials" (preforms) or 'carbon fibre preforms', having all of the following:
1. Having any of the following:
a. Inorganic "fibrous or filamentary materials" specified by 1C010.c.; or
b. Organic or carbon "fibrous or filamentary materials", having all of the following:
1. "Specific modulus" exceeding 10.15 x 106 m; and
2. "Specific tensile strength" exceeding 17.7 x 104 m; and
2. Having any of the following:
a. Resin or pitch, specified by 1C008 or 1C009.b.;
b. 'Dynamic Mechanical Analysis glass transition temperature (DMA Tg)' equal to or exceeding 453 K (180ºC) and having a phenolic resin; or
c. 'Dynamic Mechanical Analysis glass transition temperature (DMA Tg)' equal to or exceeding 505 K (232ºC) and having a resin or pitch, not specified by 1C008 or 1C009.b., and not being a phenolic resin;
Note 1: Metal or carbon‑coated "fibrous or filamentary materials" (preforms) or 'carbon fibre preforms', not impregnated with resin or pitch, are specified by "fibrous or filamentary materials" in 1C010.a., 1C010.b. or 1C010.c.
Note 2: 1C010.e. does not apply to:
a. Epoxy resin "matrix" impregnated carbon "fibrous or filamentary materials" (prepregs) for the repair of "civil aircraft" structures or laminates, having all 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. Fully or partially resin‑impregnated or pitch‑impregnated mechanically chopped, milled or cut