Silica sol enhanced hollow safety glass and preparation method thereof

Abstract

The invention discloses silica sol enhanced hollow safety glass and a preparation method thereof. The silica sol enhanced hollow safety glass comprises three layers, wherein the first layer is sandwich glass; the second layer is of a hollow structure; the third layer is single-layer glass or sandwich glass; the contact surface of the first layer and the second layer is a first contact surface; thecontact surface of the second layer and the third layer is a second contact surface; at least one surface of the first contact surface and the second contact surface is provided with a silica sol coating; the thickness of the silica sol coating is 1 to 20 mum; the silica content of the silica sol coating is not lower than 95 percent. The silica sol enhanced hollow safety glass has high bending strength and anti-impact capability; the spontaneous explosion risk is eliminated; the cost is reduced.

Description

technical field [0001] The invention relates to a hollow safety glass reinforced by silica sol and a preparation method thereof, belonging to the technical field of hollow safety glass. Background technique [0002] At present, tempered reinforced glass is generally used for door, window and curtain wall glass of high-rise buildings, but tempered reinforced glass is prone to self-explosion during use, causing safety problems. Nickel sulfide and other heterogeneous particles such as elemental silicon are the source of self-explosion of tempered glass. The reason is that the thermal expansion coefficient of the heterogeneous particles does not match the glass, which causes tensile stress on the glass around the elemental silicon particles during the cooling process. The glass cracked. Usually, the self-explosion of tempered glass caused by nickel sulfide can be eliminated by homogeneous treatment, but, as stated in the document "Safety and Countermeasures of Curtain Wall Glas...

AI Technical Summary

Problems solved by technology

Usually, the self-explosion of tempered glass caused by nickel sulfide can be eliminated by homogeneous treatment, but, as stated in the document "Safety and Countermeasures of Curtain Wall Glass" ("Glass" 2012 No. 8, No. 251, pp. 39-42), domestic The homogeneous treatment of nickel sulfide by foreign tempered glass companies cannot completely avoid the self-explosion phenomenon during the use of tempered glass, and the elemental silicon particles will cause local stress in the glass during the cooling process, and it is difficult to eliminate it during the conventional homogenization process. Self-explosion phenomenon

Patent application CN201710672962.5 provides a kind of hollow safety glass for building doors, windows and curtain walls that prevents safety accidents caused by glass fragments falling after self-explosion by pasting the film. Nor can it reduce the high cost of replacing self-exploding glass

Patent application CN201883881U discloses a three- or four-millimeter thin glass film-attached hollow safety glass that is thinned and weight-reduced and belongs to architectural glass. However, the film is bonded physically, and there is no chemical bond between the film and the glass. The attached film will have problems such as aging, cracking, and detachment, and the reliability is poor

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