Method for producing meta-aramid fiber paper-based material
US10011951B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2016 |
| Grant date | Jul 3, 2018 |
| Priority date | — |
| Expiry date | Nov 23, 2036 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F1/07
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for producing a meta-aramid fiber paper-based material includes steps of: adding functional powders into a first poly(m-phenylene isophthalamide) solution, and obtaining a homogeneous mixed solution; through a dry spinning method, obtaining meta-aramid chopped fibers; through a second poly(m-phenylene isophthalamide) solution, obtaining meta-aramid fibrids; processing the fibrids with a multi-stage classification, selecting the fibrids having an appropriate mesh number and combining in proportion; mixing the chopped fibers and the fibrids, and relieving until uniform; forming a paper through an ultralow concentration inclined wire forming machine with an ultrasonic process and a wet-papermaking process; after squeezing and drying, obtaining a meta-aramid fiber base paper, and then processing with surface coating; and, after multi-stage calendering, rewinding and slitting, obtaining the high-performance meta-aramid fiber paper-based material. The paper-based material has a thickness of 1.5-30 mil, a high whiteness, a smooth and even surface, excellent characteristics, and a good performance stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.