PU Sponge
Product Name
PU Sponge
Soflas
Overview
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.
Characteristics
■It is a special polyurethane sponge with a continuous pore structure that has fine texture, soft texture, excellent water absorption, water retention, and abrasion resistance, and is resistant to hydrolysis.
■As it can be provided in the form of a roller, sheet or block, it can be used in various production equipment and equipment.
■It has a hardness not found in PVA sponges, and can remove foreign substances that are sticking to the workpiece.
■Unlike PVA sponge, it is soft even when dry, has water absorption and retention, and is excellent in maintainability.
■Excellent heat resistance, can be used even in 100°C environments and 100°C hot water.
Application
| 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) |
| Protective material： | optical parts, precision parts |
Basic Physical Properties
| Item | Physical property value | |
|---|---|---|
| Average pore size (μm) | 25 | |
| Apparent density(g/cm3) | 0.21 | |
| Porosity (%) | 83 | |
| C hardness (roller/sheet) | 11/7 | |
| Water retention rate (%) | 400 | |
| Heat resistance (air)(℃) | 130 | |
| Heat resistance (water)(℃) | 100 | |
*The values of basic physical properties are reference values, not guaranteed values.
Standard Dimensions (mm)
| Sheet | ： | 480 x 270 x 1~24 mm (Thickness is available in 1mm increments.) |
| Roller | ： | Outer diameter A x inner diameter B x length C x core length D mm |
|
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 |
Inner diameterB：PVC core inner diameter
*Various processing (punching, cutting, polishing, etc.) is possible. If you have a desired shape, size, etc., please contact us.
Chemical Resistance
| Chemical name | Chemical resistance | |
|---|---|---|
| Sulfuric acid 35% or less | ○ | |
| Hydrochloric acid 15% or less | ○ | |
| Nitric acid 5% or less | ○ | |
| Phosphoric acid 35% or less | ○ | |
| Sodium hydroxide 1% or less | ○ | |
| Methanol | ○ | |
| Ethanol | ○ | |
| Methyl ethyl ketone | × | |
| Methyl cellosolve | × | |
| Toluene | × | |
| Liquid paraffin | ○ | |
| Silicone oil | ○ | |