The specialists of «Magma Industry» LLC, the Kostopil, Ukraine has developed a new reinforcement microfiber MAGMAWOOL, designed to create a 3D-reinforced composite materials. Microfiber is made on the basis of mechanically crushed basalt superthin fiber MAGMAWOOL, produced using induction melting of the charge at about 2200º C. This allows you to completely destroy the crystalline structure of the rock-forming minerals of basalt. With the blow heads, in a single step melt processed basalt superthin (1-3 micron) fiber characteristic feature of which is completely amorphous structure. Such fibers have enhanced mechanical strength and flexibility, better chemical and thermal stability compared to E-glass fibers. Reduced diameter of the fibers leads to a considerable increase of their specific strength as compared to basalt roving with a diameter of 13-15 microns. Visually material is a fine powder of a beige-gray color, consisting of superfine basalt fragments fibers. Fragment length caused by manner and time of grinding. The bulk density of the powder determined by the degree of grinding and is within 1.5-2 g/cm³.
The simplest product marketed under the trademark us «MAGMAWOOL-M», contains fragments of fibers with a length of 25-120 microns, and up to 10-20% of fine particles of irregular shape with the linear dimensions of 0.1-0.5 microns.
We have also developed the technology of separation of milled fibers, which can allocate fractions MAGMAWOOL-25, MAGMAWOOL-50 and MAGMAWOOL-75 microfibers having an average length of 25, 50 and 75 microns, respectively. Amount of the fine fraction of 0.1-0.5 microns in these materials is reduced by about ten times.
Microfiber MAGMAWOOL is nonflammable and environmentally friendly product from natural raw materials. It has low thermal conductivity and is completely transparent to electromagnetic waves. Conductivity of the material is lower than that of glass fiber that allows you to create high-performance insulating materials for power engineering, microelectronics and cable-conductor industry. Reduced microfiber diameter leads to a significant increase in the specific surface area thereof value. This factor allows the use of microfiber as a basis for the creation of high-performance compact filter materials and a positive effect on the adhesion energy of fibers and matrix for the creation of composite materials.
MAGMAWOOL microfiber is effective reinforcing filler in creating protective coatings, gel coats and repair putty. For the manufacture of composite materials and coatings with enhanced chemical resistance offered microfiber MAGMAWOOL-Zr made from basalt modified by zirconium silicide.