Types of Fire-resistant Glass

Characteristics, advantages and disadvantages of various common fire-resistant glass:

The common characteristics and advantages of fireproof glass are fireproof, which can block the spread of flames and heat waves when a fire occurs (different types of fireproof glass have different performances). Using fireproof glass instead of ordinary glass is a social progress. The advantages and disadvantages of each product are as follows:

(1)  High stress fireproof glass

High stress fireproof glass is made of high quality float glass through special strong tempering. It is a C type non-insulated fireproof glass, mainly used in fireproof windows of buildings. The tempering furnace used is not a general glass tempering furnace (it is a special fireproof tempering furnace) and the stress value and stress uniformity must be strictly controlled, and the technical control requirements are high. The fireproof time is generally C1.00h, and 1.50h depends on the size and installation technology. The advantages are fast production, low cost and low price; the disadvantages are that float glass has a low softening point of only more than 600 degrees, and it is difficult to achieve a long fireproof time for large sizes. It has high requirements for the installation framework and technology, and is difficult to produce.

(2)  Borosilicated fireproof glass

High borosilicate fireproof glass is made of high borosilicate original sheet through super-strength tempering. It is a Class C non-insulating fireproof glass, mainly used in fire-resistant windows, indoor fireproof partitions or fireproof curtain walls of buildings. It is also made through special strong tempering treatment. Because of its high melting point, its production equipment has higher requirements than high-stress fireproof glass, and general tempered glass factories are not capable of processing it. The fire-resistant time is generally C1.00~2.00h, and 3.00h depends on the size and installation technology. The advantages are high softening point of glass (up to more than 800 degrees), strong fire resistance, and can be made into large-panel fireproof glass; the disadvantages are high requirements for equipment and high price of original sheet.

(3)  Grouting composite fireproof glass

Grouting composite fireproof glass is made of float glass composite fireproof adhesive layer, which is Class A heat-insulating fireproof glass. The grouting composite fireproof glass circulating on the market is mainly composed of organic acrylamide as the main body, inorganic refractory materials and foaming agents added to the glass, and is mainly used in fireproof windows and fireproof partitions for building insulation. The fireproof time is A0.50~3.00h. The advantages are fast production and low cost; the disadvantages are that it cannot be used for exterior walls exposed to direct sunlight, and the fireproof adhesive layer will age and turn white and become opaque after 4 to 8 years.

(4)  Crystal silicon fireproof glass (inorganic silicon fireproof glass)

Crystal silicon fireproof glass (inorganic silicon fireproof glass) is made of float glass composite inorganic materials. It is a type A composite heat-insulating fireproof glass. It is a new type of fireproof glass introduced from Germany by Hong Kong Fopusi in 2014 and later produced by Hengbao Company. Hengbao participated in the 13th Five-Year Science and Technology Project of the Ministry of Science and Technology and promoted it nationwide. It is mainly used for heat-insulating fireproof windows, indoor or exterior wall fireproof partitions, and heat-insulating fireproof curtain walls in buildings. It can also be made into thin 4+2+4 and other type B fireproof glass. The fire-resistant time is B1.00~B2.00h and A0.50~3.00h. The advantages are that it can be used for a long time, does not turn yellow or white, and can be used on exterior walls exposed to direct sunlight; the disadvantages are that the glass needs to be baked at a constant temperature for nearly 20 hours, the production cycle is long and the cost is high.

Among the above four types, high-stress single-piece fireproof glass is the most likely to cause misunderstandings, thinking that the stress of tempered glass can be increased a little. In fact, its technical control is difficult and cannot be produced by ordinary tempering plants.