Down-like composite structure

A down-like composite structure, comprising:

• a base layer, based on the total weight of the down-like composite structure, the base layer having a weight of 9 wt % to 27 wt %;
• the base layer comprising 30 wt % to 60 wt % of a first core-sheath fiber, 10 wt % to 50 wt % of a first microfiber and 20 wt % to 30 wt % of a first 3D curly fiber;
• the first core-sheath fiber, the first microfiber and the first 3D curly fiber mixed and cross-stacked to obtain the base layer, and the base layer having a density of 14 gsm to 40 gsm;
• and
• a down-like layer disposed on the base layer, based on the total weight of the down-like composite structure, the down-like layer having a weight of 73 wt % to 91 wt %;
• the down-like layer comprising 10 wt % to 30 wt % of a second core-sheath fiber, 30 wt % to 70 wt % of a second microfiber and 20 wt % to 40 wt % of a second 3D curly fiber;
• the second core-sheath fiber, the second microfiber and the second 3D curly fiber mixed and randomly stacked to obtain the down-like layer, and the down-like layer having a density of 30 gsm to 400 gsm;
• wherein, the first core-sheath fiber and the second core-sheath fiber individually comprise a core part and a sheath part, and the sheath part covers part of or all of the outer surface of the core part;
• the core part is made of a virgin or recycled first polymer material, the sheath part is made of a virgin or recycled second polymer material, the melting point of the second polymer material is lower than the melting point of the first polymer material, and the melting point of the second polymer material ranges from 100° C. to 200° C.;
• the first microfiber and the second microfiber individually have a fineness of 0.1 D to 1.5 D;
• the first 3D curly fiber and the second 3D curly fiber individually have a hollowness of 5% to 30%;
• and
• the first 3D curly fiber and the second 3D curly fiber individually have a crimp rate of 2% to 25%.