Abstract: An aqueous coating material for use in an in-mold coating process in which a coating material is applied to an inner wall of a cavity within a mold to form a coated film, and a filler material is then injected into a gap between this coated film and an object to be treated, thereby forming a coating of the filler material on the surface of the object to be treated, with the coated film being formed as the outermost layer. Wherein the aqueous coating material includes water and a film forming aid, such that 10 g of the aqueous coating material placed in an acrylic pipe having a height of 1 m and an inner diameter of 34 mm and a pressure in the acrylic pipe is reduced to form a foam, the foam rises to a height that is at least 400 mm.

Abstract: The crash sensor of the present invention comprises a magnet, a sensing mass made of a ferromagnetic material and attractable by the magnet, a sleeve made of a paramagnetic material and restricting the movement of the sensing mass in one direction, a pair of strips that make a closed circuit by contact with the sensing mass having moved in one direction and a body fitted with the magnet and housing the sensing mass, the sleeve and the contacts; the crash sensor further comprising a magnetic shield made of a ferromagnetic material and covering the magnet and the body. The magnetic shield forms a closed-type magnetic field by covering the magnet and the body and forms an appropriate magnetic loop in the vicinity of the sensing mass, so that the crash sensor also acts as a magnetic shield to protect itself from being influenced by outside ferromagnetic bodies and makes effective use of the magnetic force of the magnet.