THERMAL INSULATION MATERIALS Aravin Prince Periyasamy 12/12/2010 aravinprince@gmail.com INTRODUCTION Military forces of many nations need to survive and fight in the most extreme conditions known on earth. The cold/wet regions tend to cause the most severe problems, as it is necessary to provide and maintain dry thermal insulation materials. 12/12/2010 aravinprince@gmail.com THERMAL INSULATING MATERIAL • The cold/dry areas, including the arctic, antarctic, and mountainous regions require the carriage and use of clothing, sleeping bags, and other personal equipment which possess high levels of thermal insulation. • Military forces are prone to sacrificing thermal comfort for light weight and low bulk items. 12/12/2010 THERMAL INSULATION (PROTECTION FROM COLD): NEW DEVELOPMENTS: One new advancement in fiber technology involves the invention of a unique, patented thermal insulation of fine bonded polyester called Primaloft®, manufactured by Albany International . It is used for insulating such things as sleeping bags and snow skiing clothes because it is light weight, durable and maintains its insulating properties when wet. 12/12/2010 aravinprince@gmail.com THERMALLY SENSITIVE MATERIALS An ideal clothing fabric, in terms of thermal comfort, should have the following attributes: High thermal resistance for protection from the cold , Low water vapor resistance for efficient heat transfer under a mild thermal stress conditions and; Rapid liquid transport characteristics for transferring heat efficiently and eliminating unpleasant tactile sensations due to perspiration under high thermal stress conditions. 12/12/2010 aravinprince@gmail.com THERMAL STORAGE AND THERMAL INSULATING MATERIALS: Zirconium magnesium oxide or iron oxide can be used as particulate filters in the molten polymer for producing heat generating Polyester, Polyamide, Polyethylene, Polypropylene and other functional fibers. 12/12/2010 aravinprince@gmail.com EFFECT OF MOISTURE ON INSULATION Any fibrous, porous insulation material is adversely affected by the presence of moisture, whether this is perspiration or rain. Replacing air of low thermal conductivity by water of high conductivity is the primary cause. Moreover, fibrous materials, particularly pile fabrics or quilted battings, have a high affinity for wicking and entrapping large amounts of moisture. 12/12/2010 aravinprince@gmail.com Thank you 12/12/2010 aravinprince@gmail.com . which possess high levels of thermal insulation. • Military forces are prone to sacrificing thermal comfort for light weight and low bulk items. 12/12/2010 THERMAL INSULATION (PROTECTION FROM. severe problems, as it is necessary to provide and maintain dry thermal insulation materials. 12/12/2010 aravinprince@gmail.com THERMAL INSULATING MATERIAL • The cold/dry areas, including the. wet. 12/12/2010 aravinprince@gmail.com THERMALLY SENSITIVE MATERIALS An ideal clothing fabric, in terms of thermal comfort, should have the following attributes: High thermal resistance for protection