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Flexing behaviour of high strength coated fabrics

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Title Flexing behaviour of high strength coated fabrics
 
Creator Bharathi, D
Alagirusamy, R
Joshi, M
Prasad, N Eswara
Das, B R
 
Subject Coated fabric
Fibril rupture
Flexing behaviour
High strength fabrics
Kevlar fabric
Polyester fabric
Residual strength
 
Description 381-387
Flexing characteristics of three varieties of thermoplastic polyurethane (TPU) coated high strength fabrics (nylon 6,6, polyester and kevlar) have been evaluated by subjecting them to 5000 cycles in a De-Mattia flex tester. The flexing damage is assessed in terms of % loss of strength by evaluating the residual tensile strength of flexed fabrics. Statistical analysis has been carried out at 95% significance level for assessing the influence of flexing cycles and variation in thermoplastic polyurethane concentration on the residual strength of coated kevlar fabrics. Accordingly, the specific trend exhibited is established. The study shows that the coated kevlar fabric has suffered with maximum strength loss, while nylon and polyester show excellent flex damage resistance with negligible strength loss. Further, the sensitivity to damage of kevlar fabric has been studied by varying the number of flex cycles from 1000 to 5000 and the extent of damage that happened within the structure is thoroughly analyzed using field emission scanning electron microscope. Finally, the possible mean of improving strength retention (22%) of coated kevlar fabric subjected to repeated flexing by the application of a proprietary high viscosity polymer coating has been proposed.
 
Date 2021-01-05T08:41:13Z
2021-01-05T08:41:13Z
2020-12
 
Type Article
 
Identifier 0975-1025 (Online); 0971-0426 (Print)
http://nopr.niscair.res.in/handle/123456789/55893
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJFTR Vol.45(4) [December 2020]