In a glass cloth made of glass having a composition that is at least 50 wt % SiO.sub.2, one of a warp and a weft that constitute the glass cloth has a filament diameter of less than 3.0 m, and the glass cloth has a thickness of 15 m or less and a weight of 10 g/m.sup.2 or less.

A method for manufacturing a brief includes use of a first stretchable fabric and a second stretchable fabric adherable to the first stretchable fabric. The second stretchable fabric defines a gluteal portion. The second stretchable fabric is placed between a core, having a buttocks profile, and a cavity of a die assembly. The core pushes a section of the gluteal portion into the cavity. Heat and pressure are applied at the section to cause a volume of a synthetic compound of the section to melt while retaining the section in the stretched state. The section is cooled such that a melted volume of the synthetic compound is infused into a remainder of the section and solidified therewithin to cause the section to acquire a shape as that acquired in the stretched state and form a molded sac configured to accommodate and conform to buttocks of a wearer.

Protective element for consumer electronic devices provided with at least one port (101) and one channel (105) for an acoustic component (104), wherein said port (101) or said channel (105) have a protection fabric against the intrusion of contaminating particles and sprays of water. According to the invention, said fabric (25) has meshes (11) having a rectangular shape, whose sides (12, 13) are made up by respective threads (26, 27). In comparison with the square mesh fabrics of the prior art, having comparable characteristics of air passage and sound transmission, the fabric forming the protective element of the invention offers the advantage of providing an increased protection capability from contaminating particles.

Protective element for consumer electronic devices provided with at least one port (101) and one channel (105) for an acoustic component (104), wherein said port (101) or said channel (105) have a protection fabric against the intrusion of contaminating particles and sprays of water. According to the invention, said fabric (25) has meshes (11) having a rectangular shape, whose sides (12, 13) are made up by respective threads (26, 27). In comparison with the square mesh fabrics of the prior art, having comparable characteristics of air passage and sound transmission, the fabric forming the protective element of the invention offers the advantage of providing an increased protection capability from contaminating particles.

A glass composition for glass fiber to achieve both high elastic modulus and low coefficient of linear thermal expansion and that enables molten glass with excellent compositional uniformity and clarity. The glass composition for glass fiber includes 42.00 to 70.00% by mass of SiO.sub.2, 10.00 to 30.00% by mass of Al.sub.2O.sub.3, 0.00 to 8.00% by mass of MgO, 0.00 to 5.00% by mass of CaO, 2.00 to 25.00% by mass of ZnO, 0.00 to 5.00% by mass of TiO.sub.2, 2.00 to 17.30% by mass of P.sub.2O.sub.5, and 0.01 to 2.00% by mass in total of MxOy (one or more oxides selected from Fe.sub.2O.sub.3, SnO.sub.2, CeO.sub.2, MnO.sub.2, Sb.sub.2O.sub.3, and As.sub.2O.sub.3), with respect to the total amount, and the content Z of ZnO, the content P of P.sub.2O.sub.5, and the content M of MxOy satisfy the following formula (1): 0.088(Z/P)M.sup.1/23.554 . . . (1).

Fibrous cleaning material and roller compositions for floor cleaners are provided. The fibrous cleaning material can include a plurality of unit fiber sections. Each unit fiber section in the plurality of unit fiber sections can include a first fine fiber material having a fineness of less than about 1 denier, a second fine fiber material having a fineness of between about 1 and 10 denier, a first bristle material having a fineness of between about 10 and 50 denier, and a second bristle material having a fineness of greater than about 100 denier. A bristle lay of the unit fiber section and a small fiber lay of the unit fiber section can be skew relative to each other.