| 摘要 |
PROBLEM TO BE SOLVED: To incorporate a buoyancy body of a life jacket in the shape of improving gas permeability and a wearing feeling. SOLUTION: The buoyancy body C is composed of front bodice buoyancy bodies 7 and 7' housed in bag bodies 4 and 4' respectively vertically divided into two parts by sewing and a back body buoyancy body 8 having an outside surface covered with synthetic resin paint. The front body buoyancy bodies 7 and 7' and the back body buoyancy body 8 of the buoyancy body C are respectively formed of a PVC and EVA foam independent foaming body, the front body buoyancy body 7 is thin in the thickness, the front body buoyancy body 7' is thicker in the thickness than the front body buoyancy body 7, and is three- dimensionally formed so as to curve along the body, the front body buoyancy bodies 7 and 7' and the back body buoyancy body 8 are formed of bottom parts 7a and 8a and longitudinal directional plural projection parts 7b and 8b, the back body buoyancy body 8 is thin in a longitudinal directional central part, and both side parts are thickly formed. |
