Structure analysis of needle-punched nonwoven fabrics by X-ray computed tomography

Needle-punching conditions determine the structure of nonwoven fabrics and the structure determines their tensile properties. However, the structural parameters of nonwoven fabrics and the relationship between these parameters and tensile properties have not been quantitatively analyzed. Therefore,...

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Bibliographic Details
Published in:Textile research journal 2019-01, Vol.89 (1), p.20-31
Main Authors: Ishikawa, Tatsuya, Ishii, Yujiro, Nakasone, Kengo, Ohkoshi, Yutaka, Kyoung Hou, Kim
Format: Article
Language:English
Subjects:
Compression
Compression ratio
Computation
Computed tomography
Fabrics
Fiber orientation
Fibers
Heat treating
Image analysis
Image processing
Materials research
Nonwoven fabrics
Parameters
Penetration depth
Structural analysis
Tensile properties
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Summary:Needle-punching conditions determine the structure of nonwoven fabrics and the structure determines their tensile properties. However, the structural parameters of nonwoven fabrics and the relationship between these parameters and tensile properties have not been quantitatively analyzed. Therefore, we analyzed the structure of needle-punched nonwoven fabrics by X-ray computed tomography (XCT). The relationships between the needle-punching conditions, tensile properties, and structural parameters, such as fiber-volume fraction and three-dimensional fiber orientation, were investigated. The fiber-volume fraction in the middle layer of the fabric was clearly larger than that of the bulk above a compression ratio of 1.4. With increasing needle penetration depth, the fibers tended to become oriented both parallel and perpendicular to the normal direction of the fabric plane while avoiding the intermediate direction. A linear relationship was found between the obtained volume fraction of fibers oriented in the normal direction and the tensile strength of the fabric. These results demonstrate that XCT image analysis is effective to evaluate the structure of needle-punched nonwoven fabrics and to design the properties of nonwoven fabrics.
ISSN:0040-5175
1746-7748
DOI:10.1177/0040517517736470