It’s a kind of super-fine “C”glass (253)  microfiber.To make it,the flame-blowing process is used.this product has such excellent properties as chemical-resistance and resistance to acid.

Usage:Battery seperator paper to reduce the amount of acid liquid entering into ions of heavy metals,and therefore to save the life of batteries.

Filament diameters from 0.3um to 3.5um can be supplied.

Glass Compositions:

SiO2 65±1.0%     Al2O3: 3±1%    CaO: 6.0±1%   MgO: 3±1%        B2O3: 5.8±1%                 Fe2O3: < 0.1%     Na2O: 14.8±15.8%                   K2O:0-1%

Specification

Spec.            Schoppor-Riedgler Degrees (SR°)      Average Dia.of Filament (um)

C-62               >62                                  0.3

C-59               59±2                                 0.38

C-54               54±2                                 0.45

C-49               49±2                                 0.6

C-44               44±2                                  0.8

C-39               39±2                                  1.0

C-34               34±2                                  1.15

C-29               29±2                                   1.3

C-24               24±2                                   1.7

C-19               19±2                                   2.5

Glass Microfiber For Battery Separator Mat