Dust collecting filter cloth
US5318831A · kind A · utility
20Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1990 |
| Grant date | Jun 7, 1994 |
| Priority date | — |
| Expiry date | Jul 27, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/59
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter cloth having a needle felt layer laminated to a nonwoven fabric sheet made of ultrafine fibers. The fibers of the nonwoven fabric sheet have a fineness of 0.2 denier or less and the fabric sheet is formed by the melt blow method. The needle felt layer preferably has a weight of from 150 g/m.sup.2 to 900 g/m.sup.2, a longitudinal tensile strength of at least 20 kg/5 cm, a transverse tensile strength of at least 20 kg/5 cm and a bursting strength of at least 10 kg/cm.sup.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.