Determining Radiative Heat Transfer Through Heterogeneous Multilayer Nonwoven Materials

A theoretical equation of the combined thermal conductive, convective, and radiative heat flow through heterogeneous multilayer fibrous materials is presented. Samples whose properties are analyzed by this equation were constructed from glass and ceramic webs and used in an earlier work to experimentally determine their thermal conductivi..

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Effects of Bond Roll Pattern and Temperature on the Microstructure and Properties of Polyethylene Nonwovens

This paper investigates the effects of bond roll pattern and bonding temperature on the microstructure, tensile properties, flexural rigidity, and abrasion of polyethylene (PE) nonwovens. Bond roll variables include percent bond area, bond point concentration, and side-wall angle. Temperature greatly affects nonwoven mechanical properties..

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Hydrophilic Treatment of Polyester Surfaces Using TiO2 Photocatalytic Reactions

Photocatalytic hydrophilic treatment of polyester surfaces is investigated using TiO2 as a photocatalyst. The hydrophilicity of photocatalyzed polyester film and fabric is evaluated by means of water absorbency, contact angles, and XPS analyses. Irradiation of uv light with an approximate wavelength of 352 nm produces effective photocatal..

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Determining Effective Thermal Conductivity of Multilayered Nonwoven Fabrics

The average effective thermal conductivity Keff is measured for forty-eight multilayered needle-punched nonwoven samples. Samples are produced using glass and ceramic fibers layered in several different constructions and punched with needles with varying numbers of barbs. The thermal conductivities are determined at steady state, using a ..

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Experiment and Analysis of Combined Heat and Water Vapor Transfer Through Clothes with Condensation

A series of experiments is performed on the combined heat and water vapor transfer through fabric at simulated high altitudes. A considerable water vapor concentration difference is imposed between the water vapor source and the environment, so that condensation takes place in the specimen. A new analytical expression for the rate of cond..

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Yarn Property Control on a Twist Drafting Frame1

Twist drafting has desirable properties for small-scale production of functional yams. In twist drafting, a yarn is directly spun out from a large mass of fibers, and the withdrawal tension in the yarn is used to maintain steady-state conditions of yam forming and yarn evenness. This work presents a mechanical analysis of twist drafting a..

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우리 화섬산업의 성장과 구조변화(17)

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우리 화섬산업의 성장과 구조변화(16)

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신소재 산업으로의 확장(11)

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신소재 산업으로의 확장(10)

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