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Inter-/Intra-Laminar Reinforced Hybrid Fibre Composites by Needle Punching and Thermal Bonding: Evaluation of Mechanical and Static Puncture Properties

Li T.-T., Wang R., Lou C.-W., Pan Y.-J., Hsieh C.-T., Lin J.-H.

Fibres & Textiles in Eastern Europe

2016

Vol. 24, no. 4 (118)

84--91

This study comparatively presents the static puncture property of different structures of intra-/inter-laminar reinforced hybrid composites via needle punching and thermal bonding techniques. The tensile and bursting properties of two composites with inter-laminar reinforcement by needle-punching and inter-and-intra- laminar reinforcement by both needle punching and using Kevlar fibres were also evaluated comparatively. The significance of process parameters including the low-melting PET fibre content, take-up speed of the punching machine, the plied orientation between the nonwoven and fabric and thermal bonding on the static puncture resistance was firstly investigated to seek out the significant parameters. The effects of significant processing parameters on static puncture and mechanical properties were explored afterwards. The research result shows that the plied orientation, low-melting PET content and thermal bonding affect the static puncture resistance most significantly. The maximum tensile strength and bursting strength occurred when hybrid composites after thermal bonding were composed of parallel-plied nonwovens and 90°-orientated glass fabric, as well as 70 wt% low-melting PET fibres. Recycled Kevlar fibre reinforcement dissipates additional static puncture resistance, and makes the static puncture resistance higher, as well as the tensile and bursting strengths for resultant hybrid fibre composites. Employing recycled Kevlar fibres is economical for the fabrication of hybrid composites. Diversified economical hybrid composites will be applied as a wall interlayer or garment interlining in the future.

Przedstawiono porównawcze omówienie statycznej wytrzymałości na przebicie różnych hybrydowych kompozytowych wzmocnionych struktur laminarnych. Badano wytrzymałość na rozciąganie i przerwanie różnych wariantów kompozytów zarówno igłowanych jak i łączonych termicznie, w tym takich, w których stosowano do wzmocnienia włókna Kevlar. Badano istotność wpływu różnych parametrów na statyczną wytrzymałość na przebicie. Stwierdzono znaczny wpływ orientacji igłowania i zawartości niskotopliwego PET.

Advances in the thermal bonding of cotton/cellulose acetate nonwovens of untreated and aqueous pre-treated webs

Duckett K. E., Bhat G. S., Gao X., Rong H.

Zeszyty Naukowe. Włókiennictwo / Politechnika Łódzka

2000

z. 59

11-16

Discovering new applications for cotton fiber in thermally bonded nonwovens has required the introduction of thermoplastic fibers having low softening temperatures. Finding the appropriate thermoplastic fiber that is both biodegradable/compostable and thermally compatible with cotton is an important consideration. Cellulose acetate is an appropriate choice for this bonding fiber. Our studies indicate that aqueous solutions containing small percentages of acetone lower thermal processing temperatures and significantly enhance properties of thermally calendered nonwovens. More recent studies have investigated the influence of water pretreatment without acetone additive and have shown that thermal processing is positively modified. Comparisons are drawn between the thermal characterization of bond points and with or without pre-treatment of blended webs prior to calendering. Similar comparisons are made on physical properties of the calendered nonwovens fabrics.