Study On The Comfort Of Down Duvet

In this paper, attempts were made to research the physical properties of down-proof fabrics, liner fabrics and down/feather assemblies. This research provides data support and theoretical guiding for quantitatively analyzing the performance of down products and improving the level of processing.The main contents and conclusion are as follows.(1) The warm-cool feeling of down-proof fabricsWe used Kes-F7ⅡB thermo Labo to research the warm-cool feeling of down-proof fabrics and liner fabrics, and their Qmax was tested and evaluated. The results demonstrated that the Qmax of down-proof fabrics is0.20-0.25W-cm-2. The Qmax of cotton fabrics is lower than that of polyester fabrics. The Qmax of liner fabrics is0.25-0.44W-cm-2. The Qmax of polyester/cotton fabrics is larger than that of cotton fabrics and lower than that of polyester fabrics.These results demonstrate that, when twill fabrics and plain weave fabrics have the same raw material, the Qmax of twill fabrics is larger than that of plain weave fabrics. When polyester fabrics and cotton fabrics have the same moisture content, the Qmax of polyester fabrics is larger than that of cotton fabrics. No matter what kinds of materials, Qmax increases with moisture content increasing. Raw materials, moisture content and the structure of fabrics are influential to the Qmax of fabrics.(2) The thermal-wet comfort of down-proof fabricsDown-proof fabrics and liner fabrics were researched. The test contents can be briefly described as there aspects. Firstly, we used YG461E digital air permeability tester to evaluate the air permeability of down-proof fabrics and liner fabrics. Secondly, we used SFJJ-606PC fabric insulation tester to evaluate the thermal insulation of down-proof fabrics and liner fabrics. Thirdly, we used YG (B)216X fabric moisture permeability tester, YG (B)871capillary effect tester, and OCA15EC optical contact angle measurement instrument to evaluate the hygroscopicity and moisture conductivity of down-proof fabrics and liner fabrics.The results show that the air permeability of down-proof fabrics is0.7-30.2mm/s, the air permeability of cotton fabrics is6.2-30.2mm/s, and the air permeability of polyester fabrics is0.7-13.3mm/s. The air permeability of liner fabrics is1.8-10.7mm/s.The insulation ratio of down-proof fabrics is15.3-27.20%. The thermal insulation of cotton fabrics is better than that of polyester fabrics. The insulation ratio of liner fabrics is14.2-28.2%.The moisture permeability of down-proof fabrics is439-1245(10g·m-2·d-1). The moisture permeability of cotton fabrics is745-1245(10g·m-2·d-1). The moisture permeability of polyester fabrics is857-1089(10g·m-2·d-1). The moisture permeability of liner fabrics is880-1183 (10g·m-2·d-1). The wicking height of down-proof fabrics is11-81mm. The wicking height of cotton fabrics is11-26mm and that of polyester fabrics is15-81mm. The wicking height of liner fabrics is22-54mm. The spreading time of liquid drops in down-proof fabrics is much longer than that in inner fabrics, and the spreading time of liquid drops in ordinary cotton fabrics is shortest.(3) The mechanical properties of down/feather assembliesDown/feather assemblies with different down content rate were researched. We used self-made device and YG141N thickness tester to test the bulkiness and compression of down/feather assemblies with different down content rate, and compared the bending performance of duck down/feather(90/10) assemblies with kapok/duck down/polyester (35/45/20) flocculus.The results demonstrate that, the bulkiness of feather/down assemblies is improved as down content increasing. And there is no obvious difference when down content is above75%. Goose down/feather assemblies are fluffier than duck down/feather assemblies, when they have the same down content rate.The thickness of down/feather assemblies declines rapidly with down content increasing in the initial stage of pressure changing, and then it declines gradually. When down/feather assemblies have the same quality, feather assemblies have minimum thickness.The bending stiffness of kapok/down/polyester flocculus is smaller than that of down/feather assemblies, when they have same square meter. The bending stiffness of duck down/feather assemblies is smaller that of kapok/down/polyester flocculus, when they have same thickness. The modulus of down/feather assemblies is less than that of kapok/duck/polyester flocculus, so down/feather assemblies are comparatively soft.(4) The heat-moisture property of feather/down assembliesFeather/down assemblies with different down content were researched. We used YG606G thermal insulation tester and YG (B)216X moisture permeability tester to test the warmth and moisture permeability of down/feather assemblies, and compared the wet resistance of kapok/feather/polyester flocculus with down/feather assemblies.The results demonstrate that, the thermal resistance of down/feather assemblies increases with down content rate increasing. When down content rate is above60%, the thermal resistance fluctuates. The warmth of goose down/feather assemblies and duck down/feather assemblies has no obvious difference, when they have the same down content rate. Moderate feathers don’t affect the warmth of assemblies.The moisture permeability of down/feather assemblies increases nonlinearly with down content rate increasing. The moisture permeability of goose down/feather assemblies is larger than that of duck down/feather assemblies, when they have same down content rate. The moisture permeability of kapok/down/polyester is larger than that of duck down/feather assemblies.