Specifications of Chengdu Intumescent Fireproof Sealant. Manufacturer of Zhentai Fireproof Sealant

Fireproof sealant is a sealing material for blocking.

It has the dual functions of sealing and fire protection.

It belongs to the measure-type fireproof materials.

Fireproof sealant is a polymer plastic material.

Therefore, when evaluating its fireproof grade,

the following standards are often adopted:

"Test method for burning behavior of plastics - Oxygen index method"

(

GB/T2406 - 93

),

"Test method for burning behavior of plastics - Horizontal and vertical burning test" (

GB/T2408 - 1996

).

Oxygen index refers to the minimum oxygen content required for a solid specimen to maintain balanced

combustion in a mixed flow of oxygen and nitrogen under specified conditions.

It is expressed as a percentage by volume of oxygen. When using the oxygen

index (

OI

) for evaluation, conduct sample tests according to

GB/T2406 - 93

and calculate and determine

the oxygen index.

The corresponding relationship between the oxygen index

(OI)

of the material and its flame retardancy is as follows:

OI

<

23

Combustible.

OI

between

24

~

28

is slightly flame - retardant.

OI

between

29

~

35

is flame - retardant.

OI

>

3

6

is highly flame - retardant.

When using

GB/T2408 - 1996

for evaluation, the sealant is generally evaluated by the vertical method.

FV-0

,

FV-1

,

FV-2

.

It is mainly used for the sealing of single or small-sized bundled cable penetration holes and the filling of gaps between cables.

It is mainly used for the fireproof sealing of building joints (such as curtain wall gaps).