Is there a starlight PMC cellulose nanofiber issue?

Starlight PMC is the first name that comes up in connection with cellulose nanofiber.
The stock price seems to be strong.
Price and hydrophilicity issues are considered to be issues in the development of cellulose nanofibers. It seems to come down if marked with the prospect of mass production with respect to price.
Raw material costs are not high and will settle down. The problem is hydrophilic. Because it is compatible with water, it is not compatible with oil.
In the case of mixing with resin, the resin is oil and may not mix well. However, it seems that several companies have developed technology to mix these well, and it can be used with polypropylene and other resins in the future.

When these are mass-produced, it may not be long before they will be used in building materials and automotive parts. What is not to be missed here is flame retardancy.
For example, the above polypropylene burns well. Cellulose nanofibers basically burn, too. surely.
Then it can be said that these composite resins burn well.

I think flame retardancy will be an important theme in the future when applying cellulose nanofibers to automobiles and railways.
Is a flame retardant added to the PP side or a flame retardant to the CNF side? Or should we put an effective flame retardant in both at the same time?

CNF is also attracting attention as an environmentally friendly material, so you will not add halogen flame retardants. Then, phosphorus-based, aluminum hydroxide, magnesium hydroxide, antimony, etc. can be mentioned, but it is not known how effective.
It is thought that boric acid, which is mainly used as a wood flame retardant, is effective for cellulose nanofibers. However, there are many types of boric acid, so I think that boric acid alone is not very effective. Isn’t boric acid based flame retardant that is distributed as a flame retardant well applied?

Any water-soluble flame retardant that is easily soluble in water will work well with CNF.

  • Added May 2017
    We received a sample from a certain company, so we applied a flame retardant mixture of cellulose nanofiber and soufa to a PP plate and performed a 45 ° C combustion test.
    The material treated to impart hydrophilicity was able to withstand the test for 5 minutes without penetrating because the flame retardant remained uniformly on the surface.
    It is a material that has not been verified yet, but we want to keep an eye on it in the future.


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