Q1. How well does SUFA perform compared to existing heat insulating materials?
SUFA is approximately three times better than glass wool, a heat insulating material that is well known in general. (Glass wool has a thermal conductivity of 0.03 to 0.05 W/m⋅K. ← The smaller the value, the better the heat insulating performance.) The reason we have been able to achieve such good heat insulating performance is that, because the aerogel framework has uniformly divided space, there is no internal gas convection or exchange of molecular thermal momentum. Because the mean free path length of molecular nitrogen is 70 nm at a normal temperature, by dividing the aerogel framework into smaller spaces than this (= by forming pores), we have achieved the same heat insulating properties as a vacuum.
Q2. The three types (monolith, powder, and granule) have different shapes, but is their heat insulating performance the same?
Their heat insulating performance is the same, but the effectiveness differs depending on the thickness. (The thicker the material, the greater the effect.) Click herefor more details.
Q3. What is the thermal conductivity?
Q4. What is the heat resisting temperature?
450℃ in an atmosphere of oxygen or 630℃ in an atmosphere of nitrogen.
Q5. What is the visible light transmittance?
At least 90% of visible light passes through in the case of a thickness of 1 cm.
Q6. What is the density?
Q7. What is the relative permittivity?
Q8. How is the durability? (Is there any degradation over time?)
There is no degradation over time.
UV light resistance: Polymeric materials often have long carbon chains, and because C=C double bonds are likely to form in such materials due to UV light, this is a major cause of yellowing. However, for our company's SUFA, because each carbon atom is part of an individually positioned methyl group, C=C double bonds do not form in principle, so there is no degradation due to UV light.
Humidity resistance: Because SUFA is hydrophobic, it does not absorb moisture.
Q9. What is the approximate bending strength?
0.05 MPa (N/m2) * when coated. → For details, see Q10.
Q10. What have you done about the weak bending strength?
By sandwiching both sides with transparent film, we have achieved a bending strength of over 0.6 MPa without losing transparency. We have therefore cleared the JIS requirement (0.5 MPa), and there is no problem with the handling ability.
Q11. About how much pressure can SUFA withstand?
Until the pressure reaches at least 10 MPa, SUFA will not break. Once the load is removed, it returns to its original shape.
Q12. Are the powder particles closed or open?
Open. The overall structure is closed, but part of it is an open-cell structure.
Q13. If oil, etc. gets into the cells, does the heat insulating performance decrease?
Q14. If a window is equipped with SUFA, how is the heat insulating performance?
If SUFA with a thickness of 12 mm is sandwiched between glass with a thickness of 3 mm, the heat transmission coefficient is 0.53 W/m2⋅K.
Q15. Q15. If a window is equipped with SUFA, is heat cracking of the glass a problem?
No heat cracking occurs.
Q16. Is it possible to give another material heat insulating performance by mixing powder with it?
Yes. We are considering using powder as a basic filler to give other materials heat insulating performance.
Q17. Is there a binder (bonding agent) in the bulk body (monolith)?
Q18. How does SUFA compare to other heat insulating materials?
As far as standalone materials go, nothing on the face of the earth offers better heat insulating performance than aerogels. Because the heat insulating performance is determined by multiplying the thermal conductivity by the thickness of the heat insulating material, in cases where plenty of space can be used for heat insulation, an inexpensive material like glass wool might be appropriate. However, in cases where space for heat insulation is limited, SUFA offers better cost performance than other heat insulating materials.
Q19. How does SUFA differ from the silica aerogels of other companies?
SUFA has a heat resisting temperature of 467℃. The products of other companies that have undergone hydrophobic treatment break apart at a lower temperature than this.
Q1. Do you accept interviews for news coverage?
We accept interview requests. If you wish to make a request, please get in touch with us via our contact form. However, depending on the developmental status, we may not be able to accept your request. Thank you for your understanding.