13_Comfort

13_Comfort - Comfort Lecture 13 Oct 9, 2007 Comfort...

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Comfort Lecture 13 Oct 9, 2007
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Comfort Enjoying the feeling of Well-being Several feelings or sensations associated with clothing Tactile properties or Hand Skin and fabric contacts Thermophysiological Thermal and Moisture regulation
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The Steam Machine Body gives off: Heat Moisture Convective plume moves ~ 160 g/min Clothing: Restricts heat flow Traps moisture Eliminated convective plume
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Clothes Good in winter – traps heat Bad in summer – traps heat, traps moisture
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Comfortable Manage heat Manage moisture Measure with: People Instruments Sweating mannequin
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Comfort Factors Moisture Properties Stretch and Recovery Thermal Insulation Air Permeability Static Buildup Tactile Properties Skin Irritants/Allergens
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Fiber Properties that affect Comfort Thermal Insulation crimp Moisture Properties absorption wickability Stretch and Recovery elongation and elastic recovery Static Buildup Electrical resistance Skin Irritants/Allergens Typically, chemical additives or residual proteins
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Comfort Depends on Fiber Properties In some cases, also depend on fiber morphology Physical Properties E.g. – specific gravity, tenacity, elongation, elastic recovery, resiliency, flexibility, stiffness These depend on polymer properties, fiber fineness, length Sorptive Properties E.g. – absorption, adsorption, wickability, affinity for oil These depend on chemical composition, molecular arrangement, and to a certain extent, surface contour and shape
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Comfort Depends on Fiber Properties Chemical Properties E.g. – resistance to acids, alkalis, oxidizing agents, organic solvents These depend on chemical composition, chemical bonds, and to a certain extent, fiber morphology Biological Properties E.g. – resistance to mildew, insect damage These depend on chemical composition Other Properties E.g. - effect of heat and flame, resistance to UV light These depend on chemical composition, chemical bonds
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Physical Properties Specific Gravity Affects the drape and weight of the cloth Tenacity Affects the tensile, tearing, and bursting strength of fabrics. Flexibility Fiber’s ability to bend or fold without breaking
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Physical Properties (Cont’d) Elongation and Elastic Affect stretch properties and, therefore, comfort and appearance properties of fabric Resiliency Ability of the fiber to recover after it has been deformed (e.g. crushed, crumpled, twisted). Affects wrinkle recovery and fabric loft Stiffness Fiber’s resistance to bending Affects fabric’s drape
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Moisture Absorption Affects skin comfort, static buildup, and dimensional stability Adsorption Fiber’s ability to hold water on the surface Wickability Fiber’s ability to transport or spread the adsorbed water (or liquid) by capillary action. Affects fabric comfort.
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This note was uploaded on 04/03/2008 for the course TT 105 taught by Professor Michielsen during the Fall '08 term at N.C. State.

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13_Comfort - Comfort Lecture 13 Oct 9, 2007 Comfort...

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