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提问者:上海市上外附小三(2)班杜欣陶重量相同的羽绒服和棉衣相比,哪种更保暖?羽绒服和棉衣的御寒原理相同:都是借由棉纤维、羽毛的聚集构成蓬松多孔的结构,填充到密闭的衣料夹层后,将空气锁在了衣服里。因为空气的传热能力很差,所以穿上羽绒服或棉衣,就等于裹上了热传递很慢的保护层,身体散发的热量就不会很快被冷空气交换掉,我们就暖和了。因为每根羽毛里都布满了充气的小孔,而且羽毛的蓬松度比棉花高,隔热效果更好,所以同等体积的羽绒成分和棉成分相比,重量更轻,所以薄羽绒服能抵得上厚棉衣。
Asked by: Shanghai Shangshen attached to the small three (2) Dudu Xintai the same weight down jacket and cotton compared to what is more warm? Down jacket and cotton warm the same principle: are gathered by the cotton fibers, feathers fluffy Porous structure, filled with airtight clothes sandwich, the air locked in the clothes. Because the heat transfer capacity of the air is very poor, so put on the jacket or coat, it is wrapped in the heat transfer is very slow protective layer, the body’s heat will not be quickly expelled by the cold air, we are warm. Because each feather is covered with inflated holes, and feathers fluffy than cotton, better insulation, so the same volume of down and cotton ingredients lighter weight, so thin down jacket can withstand Get thick cotton clothing.