Article reinforced by aramid monofilament having a slightly structured skin
US5702547A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1995 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Jun 5, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2929
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An aramid monofilament having high mechanical properties is provided. This monofilament has a slightly structured skin and resists fibrillation and abrasion. In addition, a process for the production of this monofilament is also provided. The process includes the following steps: (i) a solution of aromatic polyamide(s) is extruded as a liquid jet in a spinneret through a capillary; (ii) the jet is drawn from the capillary in a non-coagulating layer of fluid and (iii) the drawn liquid vein is introduced into a coagulating medium in order to form the monofilament, which is subsequently washed, dried and contacted with a solvent for said monofilament to produce the slightly structured skin. The aramid monofilament is characterized by the following relationships: EQU 1.7.ltoreq.Ti.ltoreq.260; EQU 50.ltoreq.D.ltoreq.480; EQU T.gtoreq.180-D/3; EQU Mi.gtoreq.1600; EQU Ar>2.00; and EQU Er>20.0 D/30. In the above relationship, Ti represents linear density in tex, D represents diameter in .mu.m (micrometers), T represents tenacity in cN/tex, Mi represents the initial modulus in cN/tex, Ar represents the elongation upon rupture in % and Er represents the energy upon rupture per unit of mass i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.