FIELD: personal use articles.
SUBSTANCE: filter is made of filtering material, containing at least three layers, from which at least two layers are made of non-woven material, and at least one layer is made of fibrous material from fibres or threads. Besides, the specified at least two nonwoven layers and at least one layer of fibrous cloth are connected to each other by means of welding.
EFFECT: increased dust capacity.
21 cl, 17 dwg, 9 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| BAG FOR VACUUM CLEANER | 2017 |
|
RU2661469C1 |
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|
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| NONWOVEN MATERIALS MANUFACTURED FROM CONTINUOUS TWO-COMPONENT THREADS AND MODIFIED WITH PULP FILAMENTS | 1999 |
|
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|
RU2465806C2 |
| NON-WOVEN FABRIC | 2013 |
|
RU2575448C1 |
| AIR-PERMEABLE LAMINATED MATERIAL ALWAYS FOLLOWING USER'S BODY OUTLINES | 2000 |
|
RU2266138C2 |
