The invention relates to a fibrous mat facer for preparing a gypsum board, to a gypsum board comprising said mat facer and to a system comprising said gypsum board. The fibrous mat comprises at least one ply of a non-woven fabric, and a binder composition, wherein the binder composition represents from 10 to 40 wt % of the total weight of the mat. The binder composition comprises a copolymer comprising a co-monomer unit of a vinyl ester of an alpha branched aliphatic monocarboxylic acid, said copolymer being present in an amount from 25 to 100 wt % of the binder composition weight.

Provided are a holding material for a gas treatment device, which is inexpensive, has a simple structure, and exhibits high holding force, a gas treatment device, and a method for manufacturing the same. A holding material for a gas treatment device according to the present invention is a holding material, which is a holding material to be arranged, in a gas treatment device including a treatment structure and a casing for housing the treatment structure, between the treatment structure and the casing, the holding material including silica fibers and an alumina sol in an amount of 3 parts by mass or more in terms of a solid content with respect to 100 parts by mass of the silica fibers.

In one aspect, a gypsum panel includes a gypsum core, a fiberglass mat, and a wetting agent deposited across an entire thickness of the fiberglass mat. The wetting agent is deposited onto the first fiberglass mat in an uncoated state of the fiberglass mat such that the wetting agent penetrates the entire thickness of the fiberglass mat.

In one aspect, a gypsum panel includes a gypsum core, a fiberglass mat, and a wetting agent deposited across an entire thickness of the fiberglass mat. The wetting agent is deposited onto the first fiberglass mat in an uncoated state of the fiberglass mat such that the wetting agent penetrates the entire thickness of the fiberglass mat.

The present invention relates to a glass composition which is resistant to alkalis and to acids, in particular for the preparation of reinforcing glass strands, which comprises the following constituents within the limits defined below, as percentages by weight: TABLE-US-00001 SiO.sub.2 ≧58%, preferably ≦65% ZrO.sub.2 15-20% R.sub.2O (R = Na, K or Li) ≧14% K.sub.2O ≦0.1%, preferably ≦0.05%, RO (R = Mg, Ca or Sr) 2.5-6% MgO ≦4% TiO.sub.2 >1 and ≦4% the composition additionally being devoid of F, comprising less than 1% of impurities (Al.sub.2O.sub.3, Fe.sub.2O.sub.3 and Cr.sub.2O.sub.3) and satisfying the following relationships:
ZrO.sub.2+TiO.sub.2≧17%
ZrO.sub.2/TiO.sub.2≧6 It also relates to the use of the glass strands obtained in the reinforcing of inorganic materials, for example cementitious materials, or organic materials, for example plastics, and to the composites including such strands.

A high-modulus glass fiber composition based on basalt includes components with contents in mass percentage satisfying SiO.sub.2: 53.0%-60.0%; Al.sub.2O.sub.3: 24.5%-28.0 %; MgO: 8%-15.0%; Fe.sub.2O.sub.3: 1.5%-5.5%; TiO.sub.2: 2.0%-4.0%; 0<CaO≤5.0%; and 0<Na.sub.2O+K.sub.2O≤2.0%.

Glass compositions and high-modulus, and high-strength glass fibers made therefrom, being capable of economical, continuous processing and suitable for the production of high-strength and/or high stiffness, low-weight composites, such as windturbine blades, the glass composition comprises the following constituents in the limits defined below, expressed as weight percentages: between about 56 to about 61 weight percent SiO.sub.2; between about 16 to about 23 weight percent Al.sub.2O.sub.3, wherein the weight percent ratio of SiO.sub.2/Al.sub.2O.sub.3 is between about 2 to about 4; between about 8 to about 12 weight percent MgO; between about 6 to about 10 weight percent CaO, wherein the weight percent ratio of MgO/CaO is between about 0.7 to about 1.5; between about 0 to about 2 weight percent Na.sub.2O; less than about 1 weight percent Li.sub.2O; and total residual transition metal oxides of less than about 2 weight percent.

Glass compositions and high-modulus, and high-strength glass fibers made therefrom, being capable of economical, continuous processing and suitable for the production of high-strength and/or high stiffness, low-weight composites, such as windturbine blades, the glass composition comprises the following constituents in the limits defined below, expressed as weight percentages: between about 56 to about 61 weight percent SiO.sub.2; between about 16 to about 23 weight percent Al.sub.2O.sub.3, wherein the weight percent ratio of SiO.sub.2/Al.sub.2O.sub.3 is between about 2 to about 4; between about 8 to about 12 weight percent MgO; between about 6 to about 10 weight percent CaO, wherein the weight percent ratio of MgO/CaO is between about 0.7 to about 1.5; between about 0 to about 2 weight percent Na.sub.2O; less than about 1 weight percent Li.sub.2O; and total residual transition metal oxides of less than about 2 weight percent.

The present invention provides a glass fiber composition, glass fiber and composite material therefrom. The glass fiber composition comprises the following components expressed as percentage by weight: 56-64% SiO.sub.2, 12-18% Al.sub.2O.sub.3, 0.1-1% Na.sub.2O, 0.1-1% K.sub.2O, 0.1-1% Fe.sub.2O.sub.3, 0.05-1% Li.sub.2O+Bi.sub.2O.sub.3, 19-25% CaO+MgO+SrO, 0.1-1.5% TiO.sub.2 and 0-1% CeO.sub.2, wherein a weight percentage ratio C1=Li.sub.2O/Bi.sub.2O.sub.3 is greater than 1, and a weight percentage ratio C2=(MgO+SrO)/CaO is 0.4-1, and a weight percentage ratio C3=MgO/(MgO+SrO) is greater than 0.7. Said composition reduces the amount of bubbles, viscosity and crystallization risk of the glass, thereby making it more suitable for large-scale production with refractory-lined furnaces.

The present invention provides a glass fiber composition, glass fiber and composite material therefrom. The glass fiber composition comprises the following components expressed as percentage by weight: 56-64% SiO.sub.2, 12-18% Al.sub.2O.sub.3, 0.1-1% Na.sub.2O, 0.1-1% K.sub.2O, 0.1-1% Fe.sub.2O.sub.3, 0.05-1% Li.sub.2O+Bi.sub.2O.sub.3, 19-25% CaO+MgO+SrO, 0.1-1.5% TiO.sub.2 and 0-1% CeO.sub.2, wherein a weight percentage ratio C1=Li.sub.2O/Bi.sub.2O.sub.3 is greater than 1, and a weight percentage ratio C2=(MgO+SrO)/CaO is 0.4-1, and a weight percentage ratio C3=MgO/(MgO+SrO) is greater than 0.7. Said composition reduces the amount of bubbles, viscosity and crystallization risk of the glass, thereby making it more suitable for large-scale production with refractory-lined furnaces.