The main raw material of soufa is boric acid, and boric acid has long been considered to have a high flame retardant effect.
However, due to some problems, it has hardly been distributed as a flame retardant until now. However, in practice, it has been found that pulp and cellulosic materials such as cardboard can be given higher flame retardancy than existing flame retardants.

Cardboard is made from pulp and is naturally a cellulosic material. Flame retardancy can be imparted by painting or spraying.
Here’s what was actually brushed onto cardboard and air dried.

Untreated cardboard will ignite easily, but soufa treated cardboard will not.
Since it is a surface coating, it does not penetrate into the middle, but if it is treated so that it penetrates into the middle, or if it can be applied at the stage of the original material, the degree of flame retardancy should be high.

This is a tissue.

And Japanese paper.

The degree of flame retardancy varies depending on the amount of processing.

Isn’t it very useful because it is possible to post-install components that need to be flame retardant such as cardboard ducts?
Until now, there has not been much demand to provide cardboard with flame retardancy, but we are thinking that flame retardant cardboard will play a major role in the future as fire prevention is being called for.

The following describes the content of the test applied to cardboard.
Test piece is 200 mm x 200 mm, thickness is 5 mm, A flute

A small amount of starch was mixed with a 23% concentration product to study the application type flame retardant.

Mixing starch rather than an aqueous solution has the effect of assisting carbonization and improves flame retardancy. However, in this case, the penetration by the burner could not be prevented only by the surface coating treatment.
Therefore, it was mixed with the primer and examined.

Since it was applied as a test, there is difficulty in terms of design.

It was able to withstand a burn test with a burner for 5 minutes.

soufa can impart flame retardancy to cellulose. Since we are a manufacturer only for the purpose of supplying flame retardant, we would like to entrust each company with detailed verification after that.

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Chart formation of the phosphate flame retardant mechanism. ※I think it was···.
The flame retardant mechanism of aluminum hydroxide is fire extinguishing due to the generation of water.

Inquiries from paper-based materials (paper, Japanese paper, cardboard, pulp, etc.) companies are increasing. The content is that they are looking for “new flame retardant / flame retardant”.
In the flame retardant industry, new products do not seem to come out easily.

We often receive consultations that use phosphorus-based flame retardants and the paper loses its stiffness or turns yellow. Also, aluminum hydroxide needs to be added in large quantities, so it seems that the texture of the paper is unsatisfactory.
However, adding flame retardancy to paper did not seem to be considered very positively, and no new flame retardant appeared.
That’s where the soufa sodium polyborate manufactured and sold by our company comes in.

Water-soluble, colorless, transparent, odorless, almost non-toxic to mammals, and highly toxic to insects.
Powder type and aqueous solution type are available.
The aqueous solution type is here.

spray on soufa tissue

It is soluble in water with a water-soluble flame retardant. The main component is boric acid, which has almost no harm to the human body.
The untreated tissue and the treated tissue ignited simultaneously.

There is a big difference in combustion.
This sodium polyborate is manufactured under the name soufa and was originally developed as a flame retardant for wood. Among them, it is known that it works well on cellulose, which is the main component of wood, and it is also attracting attention as a flame retardant for cellulosic materials such as paper and pulp.

Recently, we have been shipping some samples for cellulose nanofibers.

According to our knowledge, small amounts of phosphorous and aluminum hydroxide are more effective.
This is applied to Japanese paper, ignited after drying.

It ignited for a long time, but it did not ignite. soufa foams by heat to form a carbonized layer. Forming a coating on the surface and shutting off oxygen supply has the effect of preventing self-digestion and ignition.

This is a washi-based material with the cooperation of a manufacturer.

Although it is a thin material, it does not yellow and does not lose its stiffness.

It is attracting attention as a new flame retardant for cellulose.

We also considered it as a flame retardant for wood, so we have little knowledge of other materials.
I hope that it will be used in many fields in the future.

The post [New polyborate appeared] as a flame retardant for paper phosphate and aluminum hydroxide first appeared on SOUFA INC.Boric acid flameretardant& Termiticide.

Newspaper is paper and burns well.
However, applying soufa and drying it can easily impart flame retardancy.
soufa is refined with sodium polyborate and water only, and boric acid is the main flame retardant.
Although boric acid has long been known to be effective as a flame retardant, it has been used less often because of its poor solubility in water.

Therefore, we succeeded in creating a highly concentrated aqueous solution by combining boric acid with a special method using a unique manufacturing method. This makes it possible to apply to a variety of materials, especially for paper-based materials.

Newspaper usually ignites and spreads quickly, but due to the flame retardant effect of soufa, it does not spread or ignite just by carbonizing.
This shows that the flame retardant effect on paper is high.

Until now, inorganic phosphorus-based and nitrogen-containing compounds, aluminum hydroxide and calcium carbonate have been used as flame retardants for paper.
Isn’t the day when a new genre of boric acid flame retardants will be added here?

soufa is a pure boric acid aqueous solution purified by a special method. Soufa’s flame-retardant components dissolved in water at the nano level adhere to the cellulose of the pulp and settle on the material.
It has good compatibility with cellulosic materials, so any material containing cellulose, not just paper, can be made flame-retardant.

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soufa is a flame retardant that works well on cellulose. Since paper is also a cellulosic material, it can provide flame retardancy. According to our knowledge, smaller amounts are more effective than existing flame retardants.

Now, one of the reasons that soufa is easy to apply to paper is that it can be post-installed. It is considered that treatment with a coating machine is also possible.

Because it is water-soluble, it can be installed later in various ways. It may also be possible to mix in the manufacturing process.

And in the case of soufa aqueous solution, the application performance can be adjusted by adjusting the degree of application and concentration. If you want to increase flame retardancy, you can increase the amount of coating or increase the concentration. Therefore, you can adjust the amount of application from when you want to make it completely non-combustible to when you want it to burn to some extent.

It is expected that the effect will be effective when the amount of solid components is about 4% by weight.
However, the effect may differ depending on the material, and the pulp tends to harden. Therefore, it is necessary to add a softener such as urea as necessary.

No cases such as yellow discoloration have been reported.

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Since soufa is an aqueous solution, it can only be painted with a brush and dried.

The evaporation rate after application is the same as water. There is no toxicity, so it is easy to handle.

Painted on newspaper, it looks like this. This also just burns and does not burn.
Unlike Japanese paper, the flame retardancy is inferior because it is thin.

Even tissue does not burn.
I cut Japanese paper into small pieces. I can achieve ul94 v0.

Achieving v0 with paper may be interesting.

The post Japanese paper will not burn (it will not burn and will not spread) first appeared on SOUFA INC.Boric acid flameretardant& Termiticide.

At present, it is not anticipated that the post-production exhibits will be flame-proofed by post-processing, and there is no such technology.
In addition, flameproofing certification basically assumes factory-produced products, so post-construction on site is not expected.

I think soufa can be useful in such a situation.
The video below shows the flames coming into contact with brushed cardboard.

Flame retardancy can be imparted by spraying on products made with a single item for exhibitions.
Since soufa is a highly effective flame retardant for cellulosic materials, it has an excellent effect on paper, cloth, cardboard and pulp products. It is recommended that you first try with the materials you anticipate.
Small spray type is on sale at yahoo shopping.
SOUFA Store

We have been consulted for use at exhibits such as art exhibitions.

The post Flameproofing and flame retarding of exhibition panels, etc. first appeared on SOUFA INC.Boric acid flameretardant& Termiticide.

Characters can be drawn on the coated paper with a ballpoint pen.
Since it does not form a coating film, it can be painted or folded. You can also cut with scissors.

It is a video that fired. The fire will not spread.

This is when a 23% aqueous solution is applied. In addition, the flame retardancy has been improved. However, there is a trade-off between the texture and the degree of flame retardancy.

Spraying and spraying paper products after processing them can make the products flame-retardant.
In addition, it can be colored after soufa application, so its application range is various.

Furthermore, a high-concentration aqueous solution was produced and a simple test of flame retardancy was performed.

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