A system and process for forming a curved glass laminate article is provided. The process and system utilizes co-sagging of a stack of glass sheets of different thicknesses and different glass materials. During co-sagging the thicker glass layer is placed on top of the thinner glass layer. In this process, shape mismatch is avoided by selecting/controlling the glass materials of the sheets of glass such that the viscosity of the lower, thinner sheet during co-sagging is greater than the viscosity of the thicker glass sheet.

Embodiments of the disclosure relate to a method of controlling the flow of fluid, such as air, between a stack of glass sheets during a co-sagging process. In embodiments, this involves a particular method and certain mechanical means of applying force at or near the edges and/or corners of a stack of glass sheets during a co-sagging process. In other embodiments, this involves creating low pressure regions at or near the edges and/or corners during the co-sagging process. In particular, controlling the flow of fluid between glass sheets is particularly suitable for preventing shape mismatch between two glass sheets having different thicknesses and/or compositions.

A system and process for forming a curved glass laminate article is provided. The process and system utilizes a separation material, such as solid lubricating material and/or a spray applied separation material that Applicant has determined reduces bending dot formation during co-sagging shaping of glass sheets. The bending dot reduction provided by the separation materials discussed herein is particularly seen when the pair of glass sheets have significantly different thicknesses and/or viscosities from each other.

A system and process for forming a curved glass laminate article is provided. The process and system utilizes a separation material, such as solid lubricating material and/or a spray applied separation material that Applicant has determined reduces bending dot formation during co-sagging shaping of glass sheets. The bending dot reduction provided by the separation materials discussed herein is particularly seen when the pair of glass sheets have significantly different thicknesses and/or viscosities from each other.

Described herein is a method for spacing glass sheets from one another during stacking of the glass sheets, where the method includes: applying an interleaving powder material between adjacent glass sheets, where a composition including a powdered support material is employed, which is selected from a natural composite material based on cellulose, hemicellulose and/or lignin as the interleaving powder material between the adjacent glass sheets.

Described herein is a method for spacing glass sheets from one another during stacking of the glass sheets, where the method includes: applying an interleaving powder material between adjacent glass sheets, where a composition including a powdered support material is employed, which is selected from a natural composite material based on cellulose, hemicellulose and/or lignin as the interleaving powder material between the adjacent glass sheets.

Provided is a glass film-resin composite body which makes it possible to obtain a long-length (e.g., 500 m or more-long) glass roll. The glass roll with resin film comprises a glass film, and a resin film laminated to at least one surface of the glass film through an adhesive, wherein a creep amount a of the adhesive is 50 m or less, as measured after applying a tensile shear load per unit area of the adhesive of 5 g/mm.sup.2, to the resin film for 48 hours, in a state in which the glass film is fixed in 23 C. and 50% RH.

Provided is a glass film-resin composite body which makes it possible to obtain a long-length (e.g., 500 m or more-long) glass roll. The glass roll with resin film comprises a glass film, and a resin film laminated to at least one surface of the glass film through an adhesive, wherein a creep amount a of the adhesive is 50 m or less, as measured after applying a tensile shear load per unit area of the adhesive of 5 g/mm.sup.2, to the resin film for 48 hours, in a state in which the glass film is fixed in 23 C. and 50% RH.

A method for obtaining a laminated curved glazing, particularly for a motor vehicle windscreen or roof. The method includes the deposition (b) of an enamel layer on a stack of thin layers deposited on a first glass sheet as well as the deposition (c), at least on the enamel layer, of refractory particles based on oxides, of metals or carbides, at least one dimension of which is larger than 30 ?m. The stack of thin layers is completely dissolved by the enamel layer at the end of a bending procedure (d) carried out before laminating (e) the first glass sheet with an additional glass sheet by a lamination interlayer.

There is described interleavant particles for location between adjacent stacked glass sheets, the interleavant particles comprising an inorganic core with an outer coating, the outer coating comprising a biodegradable and/or water soluble polymer or film forming material, wherein the inorganic core is solid up to at least 100 C. has a compressive strength of at least 3 MPa and has a volumetric mass density less than 7.5 g/cm.sup.3 at 25 C.