UROSAN started the production of “Filter Foam” and related “Filter Elements” for the first time in our country.
Fields of Use:
- Vacuum cleaner filter
- Suede shoes cleaning
- Manufacturing foams which extend the shelf lives of vegetables and fruits
- Air filters
- All kinds of water and fuel oil filters
- Aquarium filters
- Ceramic filter production
- Polishing industry
- Printer cartridges
- Ventilation units and air conditioning plants
- Respiratory protective mask filters
- Fan Coil units
- Compressor production
- Cushions in wet places such as chaise longue, yachts
- Automobile air filters
- Acoustic tools (such as headphones, speakers, microphones), whitewash rollers, emission control systems and personal care products (such as make-up foams)
- Prevention of inflammation of fuel oil tanks and fuel oil agitation of the vehicles such as race cars and combat aircrafts
Main properties sought in filter foams
Being Pore Controlled:
The pore sizes of the foams should be manufactured according to the size of the particles that they will filter and these pores should be in equal heights, and distributed homogenously within the body. The sizes can be expressed in micron and they are also expressed in PPI ("Pores Per Inch") unit so as to provide ease in purchases and sales. This size is obtained as a result of counting the pores by a magnifying glass along 1 linear inch. We can thus easily understand that pores become smaller as the number increases.
Having Open Pores:
Foam pores consist of about 30% closed cells before making “Filter”. These foams are later fully opened by a method called “Reticulation”. Thus, fluids such as air or water can fully pass through.
How does the “reticulation” of the foam affect its physical properties?
All physical properties of the foam, except for its burning property, are positively affected. Tensile strength increases between 10-32% and tear strength increases by 95%. Permanent deformation decreases from 6-8% to 3-4%. It means it is stronger and the foam does not collapse. On the following table shows the physical changes of the foams with equal intensity after being reticulated. Burning speed will naturally increase as a result of opening pores. Users need to know that. Besides, UROSAN makes “flame retardant” productions at every quality.
|
Polyether |
Polyester |
|||
|
Physical Properties |
Before |
After |
Before |
After |
|
Reticulation |
Reticulation |
Reticulation |
Reticulation |
|
|
Tensile Strength |
>105 |
139 |
>120 |
132 |
|
Elongation at Break |
>115 |
168 |
>175 |
213 |
|
Tear Strength |
>3,5 |
6,9 |
>4 |
7,9 |
|
Permanent Deformation |
>6 |
3 |
>8 |
4,7 |
|
Combustion |
<18 |
23,4 |
<12 |
18,8 |
Air Permeability and Pressure Drop
For the reticulated foam is the most important feature to search is "Air Permeability". According to tests conducted of ISO 7231 on 25 mm thickness of the sample is measured 1dm3'lük air quantity flowing in the field. Higher values mean pore opening by the growth of pores, as this value increases, the shrinkage decreases. Another concept is "Pressure Drop". This concept will be used in the medium to be filtered in the fan or pump out of the standard value shows how much pressure loss incurred. Urosan produce products according to the international norms of quality control laboratories for testing and transmits this information to the user.
Reticulated Polyether Foams
Flexibility due to the characteristics of this type of foam used in upholstery and more. Besides these features, but is highly resistant to water, i.e. they are not hydrolyzed in aqueous media is a reason to be preferred. The second is their reason for being economical price.
|
Type of Foams |
Number of Cell (ad/Inc) |
Density |
Firmness (N) ISO 2439 (ILD %40) |
Firmness |
Tensile Strength(kPa) ISO 1789 |
Elongation at Break (%) ISO 1789 |
Tear Resistance |
Air Permability |
Flame Rate (cm/dak) MVSS 302 |
|
D22 RET. 10 PPI |
10 (+\-3) |
22±2 |
165 ±%15 |
39 (+\-%15) |
≥80 |
≥90 |
≥4 |
≥6 |
- |
|
D22 RET.20 PPI |
20 (+\-4) |
22±2 |
155 ±%15 |
39 (+\-%15) |
≥100 |
≥100 |
≥3,5 |
≥4,5 |
- |
|
D22 RET. 30 PPI |
30 (+\-5) |
22±2 |
150 ±%15 |
39 (+\-%15) |
≥110 |
≥120 |
≥3 |
≥3 |
- |
|
D28 RET. 20 PPI |
20 (+\-4) |
28±2 |
170 ±%15 |
41(+\-%15) |
≥100 |
≥100 |
≥5 |
≥4,5 |
- |
|
D28 RET. 30 PPI |
30 (+\-5) |
28±2 |
185 ±%15 |
41 (+\-%15) |
≥110 | ≥120 | ≥4 | ≥3 | |
|
D28 RET. 45 PPI |
37-53 |
28±2 |
180 ±%15 |
- |
≥125 |
≥130 |
≥5,5 |
≥2,5 |
- |
|
D28 RET. 60 PPI |
50-70 |
28±2 |
185 ±%15 |
- |
≥130 |
≥140 |
≥5,5 |
≥1,5 |
- |
Reticulated Polyester Foams
The mechanical properties are superior. They are resistant to oils and solvents. They are resistant to oil and oil derivatives.
|
Type of Foams |
Number of Cell (ad/Inc) |
Density |
Firmness (N) ISO 2439 |
Tensile Strength (kPa) ISO 1789 |
Elongation at Break |
Tear Resistance (N/cm) ASTM D.3547 |
Air Permeability |
Flame Rate (cm/dak) MVSS 302 |
|
D30 20 PPI |
16-24 |
30±2 |
140 ±%15 |
≥60 |
≥80 |
≥5 |
≥4,5 |
≤23 |
|
D30 30 PPI |
25-35 |
30±2 |
140 ±%15 |
≥60 |
≥80 |
≥5 |
≥3,5 |
≤20 |
|
D30 45 PPI |
37-53 |
30±2 |
160 ±%15 |
≥110 |
≥140 |
≥6 |
≥2 |
≤16 |
|
D30 60 PPI |
50-70 |
30±2 |
160 ±%15 |
≥110 |
≥150 |
≥6 |
≥1,3 |
≤14 |
|
D45 80 PPI |
70-90 |
45±3 |
240 ±%15 |
≥120 |
≥150 |
≥6 |
≥0,5 |
≤10 |