Next Article in Journal
The Connection between Biaxial Orientation and Shear Thinning for Quasi-Ideal Rods
Next Article in Special Issue
Flammability of Cellulose-Based Fibers and the Effect of Structure of Phosphorus Compounds on Their Flame Retardancy
Previous Article in Journal / Special Issue
Key Role of Reinforcing Structures in the Flame Retardant Performance of Self-Reinforced Polypropylene Composites
Article Menu
Issue 8 (August) cover image

Export Article

Open AccessFeature PaperArticle
Polymers 2016, 8(8), 288; doi:10.3390/polym8080288

Flame Retardant Polyamide Fibres: The Challenge of Minimising Flame Retardant Additive Contents with Added Nanoclays

1
Institute for Materials Research and Innovation, University of Bolton, Deane Road, Bolton BL3 5AB, UK
2
Faculty of Science, Department of Physics, Eastern University Sri Lanka, Chenkaladi 30350, Sri Lanka
*
Author to whom correspondence should be addressed.
Academic Editor: Russell E. Gorga
Received: 21 June 2016 / Revised: 26 July 2016 / Accepted: 2 August 2016 / Published: 9 August 2016
(This article belongs to the Special Issue Recent Advances in Flame Retardancy of Textile Related Products)
View Full-Text   |   Download PDF [1972 KB, uploaded 9 August 2016]   |  

Abstract

This work shows that halogen-free, flame retarded polyamide 6 (PA6), fabrics may be produced in which component fibres still have acceptable tensile properties and low levels (preferably ≤10 wt %) of additives by incorporating a nanoclay along with two types of flame retardant formulations. The latter include (i) aluminium diethyl phosphinate (AlPi) at 10 wt %, known to work principally in the vapour phase and (ii) ammonium sulphamate (AS)/dipentaerythritol (DP) system present at 2.5 and 1 wt % respectively, believed to be condense phase active. The nanoclay chosen is an organically modified montmorillonite clay, Cloisite 25A. The effect of each additive system is analysed in terms of its ability to maximise both filament tensile properties relative to 100% PA6 and flame retardant behaviour of knitted fabrics in a vertical orientation. None of the AlPi-containing formulations achieved self-extinguishability, although the presence of nanoclay promoted lower burning and melt dripping rates. The AS/DP-containing formulations with total flame retardant levels of 5.5 wt % or less showed far superior properties and with nanoclay, showed fabric extinction times ≤ 39 s and reduced melt dripping. The tensile and flammability results, supported by thermogravimetric analysis, have been interpreted in terms of the mechanism of action of each flame retardant/nanoclay type. View Full-Text
Keywords: polyamide 6; aluminium diethyl phosphinate; ammonium sulphamate; dipentaerythritol; nanoclay; tensile properties; flammability; fabrics polyamide 6; aluminium diethyl phosphinate; ammonium sulphamate; dipentaerythritol; nanoclay; tensile properties; flammability; fabrics
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Horrocks, R.; Sitpalan, A.; Zhou, C.; Kandola, B.K. Flame Retardant Polyamide Fibres: The Challenge of Minimising Flame Retardant Additive Contents with Added Nanoclays. Polymers 2016, 8, 288.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Polymers EISSN 2073-4360 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top