Review of thermally point-bonded nonwovens: Materials, processes, and properties

被引：0
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作者：
Michielsen, Stephen [1 ]
Pourdeyhimi, Behnam [2 ]
Desai, Prashant [3 ]
机构：
[1] Textile and Apparel Technology and Management, College of Textiles, North Carolina State University, Raleigh, NC
[2] Nonwovens Cooperative Research Center, North Carolina State University, Raleigh, NC
[3] FiberVisions, Incorporated, Covington, GA
来源：
Journal of Applied Polymer Science | 1600年 / 99卷 / 05期
关键词：
Recent research on all aspects of thermally point-bonded nonwovens has led to considerable improvements in the understanding of material requirements for these nonwovens; the changes that occur during bonding; and the mechanical properties of the resultant nonwoven materials. This article will review (1) how the thermal bonding process transforms the material properties of feed fibers; (2) the implications for material selection; and (3) the resultant failure properties of the bonded nonwoven. The formation of a bond during thermal bonding follows in sequence through three critical steps: (1) heating the web to partially melt the crystalline region; (2) reptation of the newly released chain segments across the fiber-fiber interface; and (3) subsequent cooling of the web to re-solidify it and to trap the chain segments that diffused across the fiber-fiber interface. The time scales for these processes closely match commercial practice. In addition; adequate pressure is required to compress the fibers that form the bond spots and enhance heat transfer to these fibers. However; pressures typically used in commercial practice are insufficient to increase the melting temperature significantly or to produce significant heating due to compression of the fibers. © 2005 Wiley Periodicals; Inc;
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页码：2489 / 2496
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