CN1318341C

CN1318341C - Novel fire-proof safety glass for building

Info

Publication number: CN1318341C
Application number: CNB021465533A
Authority: CN
Inventors: 张文玲; 苟金芳; 梁中生; 王志平; 赵恩录; 王春平
Original assignee: QINHUANGDAO GLASS INDUSTRY RESEARCH AND DESIGN INST
Current assignee: QINHUANGDAO GLASS INDUSTRY RESEARCH AND DESIGN INST
Priority date: 2002-10-22
Filing date: 2002-10-22
Publication date: 2007-05-30
Anticipated expiration: 2022-10-22
Also published as: CN1491911A

Abstract

The present invention relates to a manufacturing technique and a method for new fire-proof safety glass for buildings. A single sheet of ordinary plate glass is processed by special chemical toughening, and the ion exchange of an electric field can be strengthened; in an auxiliary electric field, cesium ions and potassium ions in molten salt quickly replace sodium ions on the glass surface; a pressure stress layer formed on the glass surface is thicker than a pressure stress layer formed by the replacement of single ions because of the mixing effect of the cesium ions and the potassium ions, and the surface pressure stress value is increased than that of ordinary chemical toughening to a great extent; in addition, the processing time is short, and the efficiency is high; then the glass is processed by special physical toughening in a special toughening furnace to make the toughening intensity of the edge of the glass greater than that of the center of the glass. Fire-proof glass manufactured by the technique has higher production efficiency than fire-proof glass manufactured by ordinary chemical toughening and physical toughening, the mechanical properties and the heat shock resistance of the glass are improved to a great extent, and the fire-proof properties are good; in addition, the problem of spontaneous explosion of glass is solved, and the use security of glass is improved.

Description

A kind of manufacture method of building safety flame resistant glass

The present invention relates to a kind of manufacture method of building safety flame resistant glass.

At present, common flame resistant glass mostly is interlayer composite fireproof glass and wired flame resistant glass greatly on the domestic and international market, the refractory adhesive that adds among the former becomes oyster white soon and produces bubble under uviolizing, influence the light transmission of glass, wired flame resistant glass not only transparence is good enough but also can not stop heat radiation, also exist simultaneously problems such as heaviness is installed, limited use as building exterior wall glass.Also have single-sheet fire-resistant glass in addition, a kind of employing spraying method carries out tempering to common float glass, and another kind is that glass is adopted general chemistry tempering and superpower physical toughened processing.

Glass cuts off as fire prevention, and when it was impacted by thermal-flame, failure mode was mainly and bursts, and improves the resistance to impact shock of glass for this reason, and the stress on reinforcing glass surface just can improve the fire resistance of glass effectively.The building safety flame resistant glass that relates among the present invention is earlier monolithic sheet glass to be carried out extraordinary chemical tempering, under being lower than glass transition temperature, glass is immersed in the caesium potassium fused salt, under the additional electric field effect, the sodium ion of glass surface is with the caesium in the fused salt, the potassium ion quick exchange, electric field auxiliary voltage 40--70v, temperature of molten salt 400--500 ℃, ion-exchange time 1--8 hour, caesium in the fused salt, potassium ion is diffused in the surface layer of glass, and the sodium ion in the surface layer of glass is diffused in the fused salt, caesium, potassium ion all is the positively charged ion big than the sodium ion radius, produce stress owing to the extruding of heavy ion at glass surface, simultaneously because caesium, the melange effect of potassium ion, the stress that glass surface forms is bigger than the stress that the single ionic exchange produces, only reach more than the 600Mpa through the glass surface value of compressive stress behind the chemical tempering, make the glass surface structure fine and close more, strength of glass is better strengthened, and this method is not seen employing in single-sheet fire-resistant glass patent CN1328976A that has delivered and CN1302773A.In physical toughened stove, carry out physical toughened again after chemical tempering is handled to glass, and make glass edge tempering temperature be higher than 20 ℃ in centre--50 ℃, edge tempering blast is greater than central part 500-1000Pa, make the tempering intensity of glass edge portion be higher than the center of glass position, solved the problem that glass at high temperature bursts from limit portion earlier.After handling through above method like this, the mechanical property and the thermal-shock resistance of glass are further enhanced, and have also avoided the stress relaxation and the common toughened glass self-explosion problem of problem in the chemical tempering simultaneously, and then improve the fire resistance and the use value of glass.

In order to more fully understand the present invention, provide following examples as an illustration.

Adopt the thick sheet glass of 5～19mm, after selected, the cutting, guaranteeing not have the defective of breach, burr and so on, otherwise glass bursts when being in high temperature easily to its edge grinding; After the grinding, again the edge that grinds is polished, make not only attractive in appearance but also safety of the finished product.

Glass immerses in caesium, the potassium fused salt after cleaning, drying, preheating, fused salt mainly is made up of saltpetre and cesium nitrate, add some additives, saltpetre and cesium nitrate (weight ratio) 87.5% wherein, aluminum oxide 4%, diatomite 2%, salt of wormwood 3%, potassiumphosphate 3.5%, under the extra electric field effect, the Na of glass surface ⁺With the Cs in the fused salt ⁺, K ⁺Quick exchange, the electric field auxiliary voltage is 60v, 430 ℃ of temperature of molten salt, 2 hours ion exchange time, glass proposes the fused salt of fused salt cooling back with warm water cleaning glass surface, to this glass test surfaces value of compressive stress 623Mpa (through national security glass and the test of silica glass quality supervision and test center).Because the ion-exchange tempering has all been carried out on the glass two sides, thereby product does not have the restriction on the installation direction when final the use.

In physical toughened stove, carry out physical toughened again behind the chemical tempering to glass, edge tempering temperature is higher than 20 ℃ in centre--and 50 ℃, edge tempering blast is greater than centre 500-1000Pa, make the tempering intensity of glass edge portion be higher than the center of glass position, because product was installed in metal frame or the alloy framework when finally using, when propagation of flame, the limit portion heat conduction of glass is the fastest, therefore the thermostability through physical toughened back glass is improved, and has avoided glass at high temperature to burst from limit portion earlier.After the aforesaid method processing, product keeps not bursting in 180 minutes under 1000 ℃ of high temperature, reaches fire prevention category-A 1 grade standard.

The technological operation that relates among the present invention is simple, and the treatment time is short, and production efficiency height, product not only fire resistance are good, and have good workability, can be processed into laminated safety glass, double glazing, coated glass and dot-type curtain wall glass.Product is easy to install, and any variation does not take place under uviolizing, can be used as the glass outer wall monolithic and uses, and effectively reduces buildings weight, improves space availability ratio.Therefore adopting the flame resistant glass of this explained hereafter is a kind of new decorative material for building, can be glass curtain wall, door and window and other needs the place of fireproofing installation that the ideal fireproof shatter proof glass is provided.

Claims

1, a kind of manufacture method of building safety flame resistant glass, it is characterized in that earlier monolithic sheet glass being carried out chemical tempering, carry out physical toughened processing afterwards again, the fused salt that chemical tempering uses mainly is made up of saltpetre and cesium nitrate, outer doping aluminum oxide, diatomite, salt of wormwood and potassiumphosphate, by in fused salt, adopting auxiliary voltage, under the extra electric field effect, the Na of glass surface ⁺With the Cs in the fused salt ⁺, K ⁺Quick exchange, electric field auxiliary voltage are 40--70v, temperature of molten salt 400--500 ℃, and 1--8 hour ion exchange time; Carry out physical toughenedly after chemical tempering is handled again in physical toughened stove, glass edge tempering temperature is higher than 20 ℃ in centre--and 50 ℃, edge tempering blast makes the tempering intensity of glass edge portion be higher than the center of glass position greater than centre 500--1000Pa.

2, manufacture method according to claim 1 wherein only reaches more than the 600Mpa through the glass surface value of compressive stress behind the chemical tempering.