Improvements in or relating to transparent units (such as glazing units, which may also be referred to as insulating glass units) and their methods of manufacture are disclosed. Each transparent unit comprises first and second panes of transparent material each having an outwardly facing side and an inwardly facing side. Each inwardly facing side is at least partially coated with a reactive interlayer made by the application of a reactive interlayer coating composition. The inwardly facing side of the first and second panes of transparent material are spaced apart partially or totally by a transparent spacer made of a pre-cured condensation curable material or a substantially pre-cured condensation curable material adhered to the inwardly facing side of the first and second panes of transparent material by way of the reactive interlayers. In various embodiments, the pre-cured condensation curable material is a silicone based material.

A vacuum insulating glazing unit comprising a planar area, first and second glass panes, k discrete spacers distributed over the planar area and positioned between the first and second glass panes, wherein k and k>8, and a peripheral bonding seal hermetically sealing the distance between the first and second glass panes defining an internal volume under vacuum, enclosed between the first and second glass panes and bounded by an inner perimeter of the peripheral bonding seal defining the planar area. The inner perimeter has a substantially rectangular geometry with a length, L, a width, W, with LW. The discrete spacers are arranged according to the stress field lines of the combination of atmospheric pressure stresses, p, applied by the atmospheric pressure on the surface of the vacuum insulating glazing, and of thermal stresses, t, resulting from a temperature difference between exterior and interior environments.

A method of producing A vacuum insulated glazing (VIG) unit, including providing a supporting structure and a solid pre-form of port soldering material provided with an opening, the supporting structure resting on the outer surface of the first pane of the VIG unit and extending over the opening of the evacuation hole, evacuating the void through the evacuation hole; and heating the port soldering material to a condition where it flows and merges across the evacuation hole while the supporting structure substantially maintain its position; and subsequently cooling the port soldering material to a solid condition so as to provide a gastight port seal forming a continuous body across the evacuation hole and preventing passage of gas to the void through the evacuation hole, and so that the port seal bonds to the outer surface of the first pane in a pattern that encloses the evacuation hole.

A glass panel unit assembly includes a pair of glass substrates arranged to face each other, a peripheral wall, a partition, an air passage, and an evacuation port. The peripheral wall has a frame shape and is provided between the pair of glass substrates. The partition partitions an internal space, surrounded with the pair of glass substrates and the peripheral wall, into a first space and a second space. The air passage connects the first space and the second space together. The evacuation port connects the second space to an external environment. The partition has a broader width than the peripheral wall.

A glass panel unit assembly includes: glass substrates; a peripheral wall having a frame shape and disposed between the glass substrates; a partition; an evacuation port; and a plurality of air passages. The partition partitions an internal space into an evacuation space, a ventilation space, and a coupling space. The evacuation port connects the ventilation space to an external environment. The plurality of air passages includes: a first air passage connecting the evacuation space to the coupling space; and a second air passage connecting the coupling space to the ventilation space. The second air passage includes a particular air passage having a larger dimension than any of the first air passage.

An object of the invention is to provide a glass panel unit manufacturing method and a glass window manufacturing method which enable a binder to be effectively removed from a glass adhesive, provide high adhesive strength between panels, and enable a vacuum space to be stably formed. A method for manufacturing a glass panel unit includes: disposing a glass adhesive to have one part as a low step part thinner than the other part of the glass adhesive; disposing a first substrate including at least a first glass substrate and a second substrate including at least a second glass substrate to face each other; and heating glass composite to form an inner space; reducing the pressure of the inner space; and forming a vacuum space from the inner space. The glass adhesive includes glass powder and a binder.

A building faade element embodied as an insulating glass unit includes at least one first and one second glass pane, at least one glass spacer consisting of glass, which is connected to each glass pane by at least one sealant, at least one other spacer which is gas-tight or comprises a gas-tight layer and is connected to each glass pane by at least one second sealant, and at least one joining region for a glass spacer and another spacer. The at least one glass spacer, the at least one other spacer and the glass panes form a closed inner chamber that does not affect the visual appearance. To this end, the at least one joining region is closed by a third sealant in a gas-tight manner, with the sealant containing butyl and being guided over the joining region.

The present disclosure relates to a method of providing vacuum insulating glass (VIG) units each comprising at least a first and a second glass pane and a plurality of support pillars distributed between opposing surfaces of said glass panes to provide a gap (8) between the glass panes. A plurality of pane elements are provided, and individual topographic representations (TOPREP_2a TOPREP_2n) of each of said plurality of pane elements (2a-2n) are obtained based on input (4) from a measuring arrangement (3), and the topographic representations are stored in a data storage (DS). The stored topographic representations are processed and resulting surface distance characteristic between pairs of panes are estimated. Vacuum insulating glass (VIG) assemblies are thus provided based on estimated resulting surface distance characteristics. The present disclosure additionally relates to a system.

The present invention provides a highly reliable multilayered glass panel and an encapsulating material for achieving the highly reliable multilayered glass panel. The encapsulating material includes lead-free low melting glass particles containing vanadium oxide and tellurium oxide, low thermal expansion filler particles, and glass beads as a solid content. A volume fraction of the glass beads in the solid content is not less than 10% to not more than 35%, and a volume fraction of the lead-free low melting glass particles in the solid content is larger than a volume fraction of the low thermal expansion filler in the solid content.

An induction-heating welding method for vacuum insulated glass comprising upper and lower glass substrates is disclosed. Metal layers are prepared in regions to be sealed for the upper and lower glass substrates. A continuous solder is distributed on the metal layer in the lower glass substrate's region to be sealed. The upper and lower glass substrates are superposed. During welding, a high-frequency induction welding head's center moves forward along a centerline of a width of the metal layers; during induction heating of the metal layers in a corner region, a relative position between a movement route of the high-frequency induction welding head's center and the centerline of the width of the metal layers is changed, so that the movement route deviates from the centerline of the width of the metal layers, and thus reducing induction power and avoiding overheating of the metal layers in the corner region.