The present application relates to a polymer composition comprising from 20 wt % to 30 wt % of a polycarbonate; from 40 wt % to 60 wt % of a polybutylene terephthalate; from 5 wt % to 30 wt % of a reinforcement fiber; from 1 wt % to 10 wt % of glass bubbles, and from 0.3 wt % to 2 wt % of transesterification inhibitor, all contents are based on the total weight of the composition. The polymer composition according to the present invention has improved adhesion to the metal (especially aluminum), even after annealing and anodizing processes are applied.

The present invention provides a glass fiber composition, a glass fiber and a composite material therefrom. The glass fiber composition comprises the following components expressed as percentage by weight: 58-64% SiO2, 14-19% Al203, ≧8.8% and <11.8% CaO, 7.5-11% MgO, 0.2-2.7% SrO, 0.1-2% Na2O+K2O, 0.05-0.9% Li2O, 0.05-1% Fe2O3, 0.05-1.1% TiO2 and <0.5% F2, wherein the range of the weight percentage ratio C1=(MgO+SrO)/CaO is 0.75-1.1, and the range of the weight percentage ratio C2=CaO/MgO is less than 1.4. Said composition can effectively inhibit the crystallization tendency of glass, significantly decrease the liquidus temperature and crystallization degree of glass and also has an outstanding glass refractive index and outstanding modulus.

The present invention provides a glass fiber composition, a glass fiber and a composite material therefrom. The glass fiber composition comprises the following components expressed as percentage by weight: 58-64% SiO2, 14-19% Al203, ≧8.8% and <11.8% CaO, 7.5-11% MgO, 0.2-2.7% SrO, 0.1-2% Na2O+K2O, 0.05-0.9% Li2O, 0.05-1% Fe2O3, 0.05-1.1% TiO2 and <0.5% F2, wherein the range of the weight percentage ratio C1=(MgO+SrO)/CaO is 0.75-1.1, and the range of the weight percentage ratio C2=CaO/MgO is less than 1.4. Said composition can effectively inhibit the crystallization tendency of glass, significantly decrease the liquidus temperature and crystallization degree of glass and also has an outstanding glass refractive index and outstanding modulus.

A high temperature resistant inorganic fiber includes 72 to 77.3 weight percent silica; 10.2 to 15 weight percent magnesia; 12.4 to 17 weight percent calcia; 0 to 1.5 weight percent alumina; and 0 to 0.6 weight percent total alkali oxides; the fiber has a use temperature of at least 1260° C.; the fiber may exhibit a shrinkage of greater than 5% after exposure to a temperature of 1400° C. for 24 hours; and the fiber may have a melt temperature of less than 1400° C.

A high temperature resistant inorganic fiber includes 72 to 77.3 weight percent silica; 10.2 to 15 weight percent magnesia; 12.4 to 17 weight percent calcia; 0 to 1.5 weight percent alumina; and 0 to 0.6 weight percent total alkali oxides; the fiber has a use temperature of at least 1260° C.; the fiber may exhibit a shrinkage of greater than 5% after exposure to a temperature of 1400° C. for 24 hours; and the fiber may have a melt temperature of less than 1400° C.

The present invention is a low dielectric resin substrate, which is a composite including an annealed quartz glass cloth and an organic resin, where the annealed quartz glass cloth has a dielectric loss tangent of less than 0.0010 at 10 GHz, and tensile strength of 1.0 N/25 mm or more per cloth weight (g/m.sup.2). This provides a resin substrate that includes a quartz glass cloth which has a low dielectric loss tangent and which is also excellent in tensile strength.

Glass compositions suitable for fiber forming having rare earth oxides (RE.sub.2O.sub.3) and glass fibers having a high modulus are disclosed. The glass composition may include SiO.sub.2 from about 44.5 to about 64 weight percent, Al.sub.2O.sub.3 from about 12 to about 32 weight percent, CaO from about 0.1 to about 15.5 weight percent, MgO from about 5 to about 22 weight percent, Fe.sub.2O.sub.3 less than 1 weight percent, TiO.sub.2 less than 2 weight percent, Na.sub.2O less than 3 weight percent, Y.sub.2O.sub.3 up to 12 weight percent, CeO.sub.2 up to 6 weight percent, ZnO up to 4 weight percent, and B.sub.2O.sub.3 less than 4.5 weight percent. The glass compositions can be used to form glass fibers and incorporated into various composites.

Glass compositions suitable for fiber forming having rare earth oxides (RE.sub.2O.sub.3) and glass fibers having a high modulus are disclosed. The glass composition may include SiO.sub.2 from about 44.5 to about 64 weight percent, Al.sub.2O.sub.3 from about 12 to about 32 weight percent, CaO from about 0.1 to about 15.5 weight percent, MgO from about 5 to about 22 weight percent, Fe.sub.2O.sub.3 less than 1 weight percent, TiO.sub.2 less than 2 weight percent, Na.sub.2O less than 3 weight percent, Y.sub.2O.sub.3 up to 12 weight percent, CeO.sub.2 up to 6 weight percent, ZnO up to 4 weight percent, and B.sub.2O.sub.3 less than 4.5 weight percent. The glass compositions can be used to form glass fibers and incorporated into various composites.

A composition comprising a Lewis base containing depolymerization liquid and methods of using the Lewis base depolymerization liquid to depolymerize the polymer component of fiber reinforced polymers to form free fibers.

A composition comprising a Lewis base containing depolymerization liquid and methods of using the Lewis base depolymerization liquid to depolymerize the polymer component of fiber reinforced polymers to form free fibers.