Wood and xylem flame retardant / flame and fire protection for railways [polyboric acid]

soufa is a boron-based flame retardant aqueous solution. For wood, etc., it is effective to apply it as it is.
Although details cannot be disclosed due to confidentiality, we have cooperated with some railways in making the wood parts flame-retardant and flame-proof.
We have received some requests for cooperation on future railways.

Compared to the nonflammability test of building materials, the combustion test of railways passes relatively easily because the standard is loose. If it is wood, it can be cleared just by applying soufa. We believe that it will reach that level with about two coats.

The other day, soufa passed the fire qualification test, but recognizes that the railway fire test is almost the same level.
It is a 45-degree Meckel burner method and was cleared by soufa application.
In this case, it could be passed with one coat, so depending on the material, it may not be necessary to apply as much.

Due to the recent boom in railways, the use of wood for interior decoration is increasing in commemorative express trains.
In the case of railways, post-treatment is considered to be sufficient because flame retardancy is not required as much as using non-combustible wood. soufa is a colorless, transparent, odorless aqueous solution that does not significantly affect the texture of wood, so it can maintain the same texture.
Boric acid, the main raw material of soufa, also has ant and antiseptic effects, so wood lasts longer.

The drawback is that it is water-soluble and cannot be used where it is exposed to water. So it is not suitable for exterior use, but interior use is fine. There is no railway that uses wood for the exterior. . .

The effect is semi-permanent because it does not volatilize with inorganic substances.

The effect is high as a fire countermeasure because the difference can be obtained only by painting.

Paper-based materials are also effective.

This is one impregnated in Japanese paper.

Excellent cost performance because it can be used in post-construction.
Incombustible wood is expensive because it must be manufactured at the factory each time.
Since soufa is an inorganic substance and does not volatilize, once installed, the effect lasts semipermanently.

It is easy because it can be treated by painting or spraying, and there is no toxicity so subsequent problems are also safe.