Abstract: A method for producing a mat including a three dimensional filament loop aggregate comprises extruding molten thermoplastic synthetic resin die to form a plurality of filaments. The filaments are heated and descend onto a surface of a cooling liquid, between a pair of rotatable rolls submerged in the cooling liquid. The filaments are all cooled simultaneously by the cooling liquid and form loops on the surface thereof. A first series of loops formed from outermost filaments are supported on one of the rotatable rolls in the cooling liquid, with the loops being horizontal. Rotation of the roll moves these loops into a vertical position. Thereafter, all the loops are integrated, with the loops formed by the outermost filaments being in a vertical position, and the loops formed by the remaining filaments being in the horizontal position.

Abstract: In this mat consisting of filament loop aggregations, irregular form loops are formed in the upright direction by respectively winding to be coil-like many filaments coarse in the arranging intervals and made of a thermoplastic synthetic resin and are fused in the intersecting parts and the other loops are formed in the laterally fallen direction and are fused in the overlapping parts.

Abstract: A method of producing a mat consisting of filament loop aggregations. The first step is that of forming a first filament loop aggregation low in the filament density wherein many filaments are made. These by extruding a thermoplastic synthetic resin out of a T-die and arranging the resin longitudinally and laterally at intervals for continuous molding. The resin is deposited on a boiling water surface. The filament temperature is maintained close to the temperature at the time of molding by heating while the filament bundle is vertically lowered toward a cooling water surface and is sunk into water in the vertical direction.

Abstract: In this mat consisting of filament loop aggregations, the filament loop aggregations wherein irregular form loops are formed in the upright direction by respectively winding to be coil-like many filaments coarse in the arranging intervals and made of a thermoplastic synthetic resin and are fused in the intersecting parts are overlapped above and below an intermediate filament loop aggregation layer high in the filament density and formed of coiled loops in the partly or all laterally fallen direction.