Fiber structure

#The present invention relates to a fiber structure with excellent heat retention and wearing comfort and a garment obtained by using the same, and in particular, to a fiber structure to be used preferably in underwear, T-shirts, etc. which are directly in contact with the skin of a human.

#Conventionally, as a means for improving heat retention of a garment and the like, many garments having a three-layer structure including a lining, a heat retentive material such as an inner cotton, and an outer fabric are known (see Patent Document 1). However, the outer fabric of these garments is used for improving wind protection and heat retention, which causes a stuffy feeling when worn, and is not suitable to be used for innerwear due to a fabric thickness caused by the three-layer structure.

#In addition, as for a heat retention fiber product suitable to be used for innerwear, a fiber structure containing a viscose rayon fiber, a cation dyeable polyester fiber, a polyacrylic synthetic fiber, and a spandex fiber is known (see Patent Documents 2 and 3). However, there is still a problem in that these fiber structures have a low heat retention rate. Therefore, there is a demand for a fiber product having higher heat retention.

#Next, a fiber structure according to an embodiment of the present invention will be described in detail.

#The fiber structure of the present invention is a fiber structure containing: a viscose rayon fiber in an amount of more than 15% by mass and less than 40% by mass; a cation dyeable polyester filament yarn in an amount of more than 10% by mass and less than 45% by mass; a polyacrylic synthetic fiber in an amount of more than 25% by mass and less than 60% by mass; and a spandex fiber in an amount of more than 3% by mass and less than 15% by mass, wherein the fiber structure has a nap formed on a front surface or a back surface thereof.

#The fiber structure of the present invention contains the viscose rayon fiber in an amount of more than 15% by mass and less than 40% by mass. The viscose rayon fiber is contained in the amount as described above, such that it is possible to obtain a fiber structure excellent in durability and having a hygroscopic heat generation performance. Since the fiber structure has the hygroscopic heat generation performance, the fiber structure is heated by a water vapor generated from a human body when worn, which can raise a clothing temperature. In a case where the amount of viscose rayon fiber is 40% by mass or more, the fiber structure is likely to be wrinkled after being washed due to a property of the viscose rayon fiber. In addition, in a case where the amount of viscose rayon fiber is 15% by mass or less, the hygroscopic heat generation performance of the fiber structure is not sufficiently exhibited.