Particle-loaded microfiber sheet product and respirators made therefrom
US3971373A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1974 |
| Grant date | Jul 27, 1976 |
| Priority date | — |
| Expiry date | Dec 6, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/256
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A self-supporting durable flexible conformable low-pressure-drop porous sheet product that contains a uniform three-dimensional arrangement of discrete solid particles. This sheet product comprises, in addition to the particles, a web of melt-blown microfibers in which the particles are uniformly dispersed. The particles are physically held in the web, even though there is only point contact between the microfibers and the particles, whereby the full surface of the particles is available for interaction with a medium to which the sheet product is exposed. The sheet product is especially useful in respirators in which, for example, the sheet product is shaped as a cup-like member adapted to fit over the mouth and nose of a person.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.