Polyamide Fibers

Yang, H. H.

doi:10.1201/9781420015270.ch2

Cited by 7 publications

(9 citation statements)

References 151 publications

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“…Moreover, to improve its efficiency, it is proposed to combine it with other flame retardants. It is reported in the literature that sulfur compounds can act as synergists with phosphorus based compounds such as ammonium polyphosphate [5], but the literature on this subject is very limited. Ammonium polyphosphate (APP) is widely used, in particular in intumescent systems, as an acid source.…”

Section: Introductionmentioning

confidence: 99%

Flame Retardancy of PA6 Using a Guanidine Sulfamate/Melamine Polyphosphate Mixture

et al. 2015

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Polyamide 6 (PA6) is a widely-used polymer that could find applications in various sectors, including home textiles, transportation or construction. However, due to its organic nature, PA6 is flammable, and flame-retardant formulations have to be developed to comply with fire safety standards. Recently, it was proposed to use ammonium sulfamate as an effective flame retardant for PA6, even at low loading content. However, processing issues could occur with this additive considering large-scale production. This paper thus studies the use of another sulfamate salt-guanidine sulfamate (GAS)-and evidences its high efficiency when combined with melamine polyphosphate (MPP) as a flame retardant for PA6. A decrease of the peak of the heat release rate by 30% compared to pure PA6 was obtained using only 5 wt% of a GAS/MPP mixture in a microscale calorimeter. Moreover, PA6 containing the mixture GAS/MPP exhibits a Limiting Oxygen Index (LOI) of 37 vol% and is rated V0 for the UL 94 test (Vertical Burning Test; ASTM D 3801). The mechanisms of degradation were investigated analyzing the gas phase and solid phase when the material degrades. It was proposed that MPP and GAS modify the degradation pathway of PA6, leading to the formation of nitrile end-group-containing molecules. Moreover, the formation of a polyaromatic structure by the reaction of MPP and PA6 was also shown. OPEN ACCESSPolymers 2015, 7 317

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Section: Introductionmentioning

confidence: 99%

Flame Retardancy of PA6 Using a Guanidine Sulfamate/Melamine Polyphosphate Mixture

et al. 2015

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“…Each muka strand was weighed (mg; Mettler Toledo AT400 balance) to calculate the linear density (tex). Six tensile properties were calculated from the forceextension curves recorded for each strand; strength (tenacity N/tex), stiffness (modulus N/tex), extensibility (strain at maximum load %, strain to rupture %), and toughness (specific energy to maximum load mN/tex, specific energy to rupture mN/tex (Yang 2006;Morton and Hearle 2008). Each of these properties provides different information about the behaviour of fibre.…”

Section: Tensile Propertiesmentioning

confidence: 99%

Consolidation of Black-dyed Māori Textile Artefacts: Evaluating the Efficacy of Sodium Alginate

Smith

Paterson

Lowe

et al. 2016

Studies in Conservation

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Black-dyed artefacts are found in museums worldwide, many produced using an irontannate compound. Deterioration of iron-tannate dyed artefacts is an international preservation issue: in New Zealand the deterioration of paru (iron-tannate) dyed Māori textiles is widespread. This article reports experimental work testing the efficacy of sodium alginate, a consolidant developed for deteriorated paru-dyed muka (fibre from harakeke; Phormium tenax). The colour stability, strength retention, and acidity of paru-dyed muka consolidated with sodium alginate (0.25, 0.5, and 1% w/v in water) was tested pre-and post-artificial light ageing. This study found that sodium alginate had no negative effect on paru-dyed muka and in some cases provided benefit. Interestingly, the colour of parudyed muka is substantially more stable in UV-filtered light than previously recognised. Also microfading results were in agreement with visual assessments of colour change at 1 Mlux hour exposure, providing confidence in this relatively new technique to assess colour change.

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“…Entre as fibras poliméricas sintéticas, as fibras de poliamida estão entre as mais utilizadas e são consideradas as mais nobres das fibras sintéticas, devido as suas características de elevada resistência mecânica, elasticidade, maciez, leveza e brilho, podendo ser utilizada em uma variedade de aplicações têxteis. (YANG, 2007;MAKHLOUF, 2015).…”

Section: Introductionunclassified

Caracterização Térmica De Poliamida Recilada Proveniente De Resíduos Têxteis

Machado¹,

Campos²,

Aguilera³

et al. 2021

Anais Do(a) Encontro Nacional De Modelagem Computacional E Encontro De Ciência E Tecnologia De Materiais

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Resumo A busca pela diminuição de resíduos sólidos, por parte das indústrias, é cada vez maior, não só por questões ambientais, mas também pelo crescente entendimento da necessidade de criar materiais e processos mais sustentáveis. Dessa forma, criar meios de reciclar e reutilizar materiais, que até então eram descartados, tem sido um trunfo nessa empreitada. Este trabalho se propôs a processar resíduos têxteis poliméricos (poliamida/elastano), que inicialmente possuem característica de altíssima elasticidade, transformando-o em um pó, com granulometria média inferior a 500 μm, que pode ser reprocessado e transformado em um novo material. Fez-se também a caracterização térmica desse material, de forma a determinar propriedades que demonstram a aplicação, foram executados os ensaios de termogravimétricas (TG/DTG) e calorimetria diferencial de varredura (DSC). Como resultados observou-se que, mesmo após o processamento, o material manteve características térmicas semelhantes ao da poliamida 6, que é o principal costituintee da microfibra.

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Polyamide Fibers

Cited by 7 publications

References 151 publications

Flame Retardancy of PA6 Using a Guanidine Sulfamate/Melamine Polyphosphate Mixture

Flame Retardancy of PA6 Using a Guanidine Sulfamate/Melamine Polyphosphate Mixture

Consolidation of Black-dyed Māori Textile Artefacts: Evaluating the Efficacy of Sodium Alginate

Caracterização Térmica De Poliamida Recilada Proveniente De Resíduos Têxteis

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