PO (Polyurethane) Sponges
A special polyurethane sponge that has a fine continuous pore structure, excellent water absorption, heat resistance, and chemical resistance, and can be used in a wide range of environments.
Cleaning：Hard disks, glass substrates for FPD, etc.
Water absorption/liquid absorption：glass, printed circuit board, lead frame, metal parts, resin, film, condensation inside equipment
Coating：resin/film (release agent, antistatic agent), paper (water-soluble adhesive), metal (oil)
Applications
| Item | Physical property value |
|---|---|
| Average pore size (μm) | 25 |
| Apparent density (g/cm3) | 0.21 |
| Porosity (%) | 83 |
| C hardness (roller/sheet) | 7/11 |
| Water retention rate (%) | 400 |
| Heat resistance (air) (Degree C) | 130 |
| Heat resistance (water) (Degree C) | 100 |
Properties
| Chemical name | Chemical resistance |
|---|---|
| Sulfuric acid 35% or less | Excellent |
| Hydrochloric acid 15% or less | Excellent |
| Nitric acid 5% or less | Excellent |
| Phosphoric acid 35% or less | Excellent |
| Sodium hydroxide 1% or less | Excellent |
| Methanol | Excellent |
| Ethanol | Excellent |
| Methyl ethyl ketone | Not compatible |
| Methyl cellosolve | Not compatible |
| Toluene | Not compatible |
| Liquid paraffin | Excellent |
| Silicone oil | Excellent |
Chemical Resistance
Standard Sizes
| Outer diameter A | Inner diameter B | length C | Core length D |
|---|---|---|---|
| 40 | 22(16) | 600 | 660 |
| 50 | 26(20) | 600 | 660 |
| 60 | 26(20) | 600 | 660 |
*Please contact us regarding your desired size, as these are only part of the specifications and standards possible.
Test conditions: Judgment by soaking for 2 weeks at room temperature (about 20°C)
Judgment Criteria:
Excellent = Strength retention rate of 80% or more and dimensional change rate of less than 5%
Conditional = Strength retention rate of 60% or more and dimensional change rate of less than 10%
Not compatible = Less than 60% strength retention or 10% or more dimensional change
*Depending on the application and usage, please perform an immersion confirmation test in advance.
*Wash (according to the cleanliness control level) before use, depending on the application.