| |
| <Change in peel strength
by repeated application and detachment to the human skin after
washing with water> |
 |
The left figure
shows the changes in peel strength by repeated application
and detachment to the human skin after washing with water.
Restoring of adhesive strength by washing with water can be
confirmed. Generally we feel pain when peeling at more than
300g/2.5cm of peel strength and an adhesive pad will drop off
from the skin at less than 100g/2.5cm by motions of the skin
due to low adhesive strength.
GELRODE can be designed to have appropriate adhesive strength
to human skin. |
|
| Measuring temperature |
Ionic conductivity σ (S/cm) |
| 100°C |
10-3 to 10-4 |
| Room
temperature |
10-4 to 10-5 |
| 0°C |
10-6 |
|
|
| Impedance of GELRODE
(35mm×35mm×2mm) is 60Ω and specific resistance
is 3kΩcm. GELRODE demonstrates good ionic conductivity enough
to use as bioelectrode such as electrode of electrocardiograph
and stimulating electrode of low frequency therapeutic device. |
<Test condition>
Under room temperature and humidity (23°C, 65%RH) for two years
in plastic film package.
Storage in opened package with separator
| 40°C |
75 to 80% |
48hours |
| 40°C |
30 to 35% |
48hours |
| -10°C |
|
48hours |
Storage in closed package
| 60°C |
|
48hours |
| -25°C |
|
48hours |
| 40°C |
90 to 95% |
48hours |
| 40°C |
30 to 35% |
48hours |
GELRODE shows excellent stability in adhesive strength, electroconductivity
and appearance under these conditions. |
| Comparative Model of Gels |
| GELRODE is one-component
gel, which consists of liquid segments without containing dispersion
medium. Hydrogels (organogel) are categorized in the two-component
gel, which consist of polymers and water (organic solvent). Media
can't be avoided releasing from those gels. |
| Tests |
Standard |
Results |
| Acute Toxicity Test |
Ministry of Health and Welfare Extra
Notice No.442 |
Not Toxic |
| Intracutaneous Administration Test |
Ministry of Health and Welfare Extra
Notice No.442 |
Not Toxic |
| Primary Irritation Test |
EPA Guidelines |
Primary Irritating Index"0"(non-irritant) |
| Cytotoxicity Test |
ISO 10993-5 |
non-cytotoxic |
| Test for Fungus Resistance |
JIS-Z-2911 |
Fungus Resistance Index"3"(no
fungus was observed) |
| Electrical Performance |
AAMI Standard |
Passed |
|
|
| Method: 25mm ø of
samples are adhered to stainless plate, then 500g of weight applies
to them for 30 sec. Adhesive Strength is maximum value in detaching
from plate at the rate of 150mm/min. |
|
