FAQ

FAQ

FAQ
Q: At what temperature (degree in Celsius) of process can it be used?
A. DryCure Au-J series can be used for coating-drying at the room temperature if the condition allows the solvent to be dried completely. This material contains water and glycol in its solvent; therefore, the drying time varies largely due to the season (humidity) of the room. The surface of the nanoparticle is absorbed with solvent molecules even when it appears to get dried. When the solvent molecules are almost completely removed (it may take several days), then the final conductivity (to 50 μΩcm) can be obtained. As for DryCure Ag-J series, we suggest a heating. If the process does not have any problems, then 30 to 60-minutes drying above 120 degrees Celsius will result in resistivity lower than 40 μΩcm. Heating with higher temperature on both DryCure Au and Ag does not cause any problems on the nanoink; rather you can get a better conductivity and adhesion.

Q: What kind of solvent is used? Is there any solvent-based ink?
A. DryCure series require water as the main solvent. Nonpolar solvent cannot be used.

Q: Do you provide any ink for inkjet, and pastes for screen printing? Do you also have any other printing methods?
A. As for inkjet, please use DryCure Au-J and/or Ag-J. We can provide ink conformable to all kinds of printer heads. Moreover, when it is necessary to have adhesion onto film substrate such as untreated PET, glass, glass epoxy, please use binder-added grade types of DryCure Au-JB or Ag-JB. The viscosity of DryCure series is a few millipascals, so they cannot be used for screen printing. As other printing method, we have an achievement on flexography. Please use DryCure Au-J or Ag-J both have the viscosity of 10 cps.

Q: On what type of substrate can they be used?
A. Resin films such as PET and glass substrates can be used. When printed onto ordinary easy-adhesion PET films, the adhesion performance increases by heating in 120-degree Celsius for about 10-minutes after drying. For resin film substrates, firstly try heating after printed. We have confirmed adhesion onto various resin film substrates such as polyimide, and liquid crystal polymer films; both have thermoplastic-layer. Even for the film substrate which does not gain adhesion in normal practice, binder-added grades (DryCure Au-JB and Ag-JB) could conform for some cases.

Q: Does the coated film re-dissolve after drying?
A. Once DryCure is dried it becomes insoluble in solvent such as water. Therefore, recoating will be possible utilizing this characteristic.

Q: Are there any points to notice when storing the inks?
A. All products of DryCure series become insoluble toward solvent once they are dried. When the container stored with ink is expanded with gaseous body; the solvent continues evaporation and condensation within the expanded space. During this process, dried-metal-solid content would be gradually extracted. In order to prevent this, eliminate the air within the container as much as possible, and then store the product. By applying such operation, the contact with oxygen will be minimized; then, it is possible to prevent drying at the same time to prevent deterioration by oxidation. (When DryCure Ag is used, deterioration by oxidation occurs.)

Q: Is the quality of the samples as same as mass produced products?
A. Both have the same quality. You can be sure of the quality.

Q: I want DryCure **, not DryCure **-J/**-JB
A. Sorry, we've stopped sale of DryCure **series. Please use DryCure **-J/**-JB series.

Q: I know that treating at 100℃ (or more over) is better. But, when I treat at lower temperature, how the conductivity would change?
A. Well, if you have long time, that's one of the way. Please see this file.