Cylindrical filter
US4861633A · kind A · utility
24Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 19, 1988 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | May 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/637
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A superior cylindrical filter having a long filtration life is provided, which filter is obtained by using interlaced filaments comprising 20% by weight or more of hot-melt-adhesive composite filaments composed of plurality of components having a melting point difference of 20.degree. C. or more and having two or more interlaced portions per meter of which the interlacing strength is 15.times.D mg or more, wound up on a core material in a cylindrical form under a tension of 15.times.D mg or less, the contact points of the interlaced filaments being bonded by melt-adhesion of the low melting component of the composite filaments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.