FIELD: satisfaction of human life necessities.
SUBSTANCE: permeability of the first filtration layer exceedes 60%, in particular 75%. The first filteration layer comprises at least three and maximum twenty-five separate layers, in particular at least five and a maximum of fifteen separate layers. Each separate layer is nonwoven with a dry laying and density from 5 g/m2 to 50 g/m2, in particular from 8 g/m2 to 30 g/m2.
EFFECT: increasing filter efficiency.
17 cl, 7 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| FILTER BAG FOR VACUUM CLEANER | 2008 |
|
RU2457770C2 |
| FILTER BAG FOR VACUUM CLEANER | 2008 |
|
RU2465806C2 |
| BAG FOR VACUUM CLEANER | 2017 |
|
RU2661469C1 |
| VACUUM CLEANER FILTER BAG | 2010 |
|
RU2524901C2 |
| FILTERING BAG FOR VACUUM CLEANER MADE OF RECYCLED PLASTIC | 2017 |
|
RU2706308C1 |
| VACUUM CLEANER FILTERING BAG | 2010 |
|
RU2526777C2 |
| FILTERING BAG FOR VACUUM CLEANER, CONTAINING RECYCLED PULVERIZED AND/OR FIBROUS MATERIAL | 2017 |
|
RU2706307C1 |
| FILTERING BAG FOR VACUUM CLEANER, CONTAINING RECYCLED PULVERIZED AND/OR FIBROUS MATERIAL AND/OR SEEDS FIBERS | 2017 |
|
RU2706309C1 |
| WAY OF MANUFACTURING ANTIMICROBE NON-WOVEN MATERIAL | 0 |
|
SU1652406A1 |
| FILTER MADE OUT OF A COMPOSITE MATERIAL AND A METHOD OF ITS MANUFACTURE | 2000 |
|
RU2240856C2 |
