Rigidity reinforcement insulation sheet
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The D461/D461S rigidity reinforcement insulation sheets are mica sheets developed for the purpose of reducing the weight and reinforcing the rigidity of mechanical components used for laptops. The D461S is a product that has improved the surface smoothness of D461.
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Characteristics
They have excellent strength, and fragments are not scattered even when subjected to impact.
They have high compressive strength and can be designed to thin and lighten the product for its slight curve and warp.
Thanks to excellent workability, cutting, machining, and punching can be done easily.
They have obtained the UL94-V1 standard. (D461: from 1 mm, D461S: from 0.3 mm)
They have smooth surface and texture like glass.
Use
Rigidity reinforcement board for laptops
Touchpad dielectric
Composition, standard dimensions and properties
D461
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Composition,standard dimensions
Mica Mica paper based on uncalcined muscovite Binder Epoxy Standard thickness (mm) 0.20～20.00 Standard dimensions (mm) 600×1000 -
Properties
Nominal thickness（mm） 0.55 Apparent density（kg/㎥） 2.2×10³ Dielectric breakdown strength（kV/mm） 56 Insulation resistance：Normal state（MΩ） 2000 or more Surface resistivity（Ω） 7×10¹⁴ Dielectric constant：60Hz（F/m） 4.0 Dielectric constant：1MHz（F/m） 3.9 Dielectric tangent：60Hz（%） 1.4 Dielectric tangent：1MHz（%） 0.5 Flexural strength（MPa） 418 Elastic modulus in bending（GPa） 55 Thermal conductivity（W/m·K） 0.42 Surface roughness/Ra（μm） - Arc resistance（s） 181 Comparative tracking index/CTI（V） 600 Combustibility 94V-1（t1.0mm or more）
94V-0（t5.0mm or more）
- *Measured in compliance with JIS C 2116 and JIS K 6911.
- *The above values are examples from tests, and are not guaranteed values.
D461S
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Composition,standard dimensions
Mica Mica paper based on uncalcined muscovite Binder Epoxy Standard thickness（mm） 0.30～1.0 Standard dimensions（mm） 600×1000 -
Properties
Nominal thickness（mm） 0.50 Apparent density（kg/㎥） 2.5×10³ Dielectric breakdown strength（kV/mm） 54 Insulation resistance：Normal state（MΩ） 2000 or more Surface resistivity（Ω） 1×10¹⁵ Dielectric constant：60Hz（F/m） 5.9 Dielectric constant：1MHz（F/m） 5.2 Dielectric tangent：60Hz（%） 0.7 Dielectric tangent：1MHz（%） 0.5 Flexural strength（MPa） 483 Elastic modulus in bending（GPa） 77 Thermal conductivity（W/m·K） 0.43 Surface roughness/Ra（μm） 0.62 Arc resistance（s） 181 Comparative tracking index/CTI（V） - Combustibility 94V-1（t0.3mm or more）
- *Measured in compliance with JIS C 2116 and JIS K 6911.
- *The above values are examples from tests, and are not guaranteed values.