Three-dimensional net-like structure, and method and device for producing three-dimensional net-like structure
A method of and an apparatus for manufacturing a three-dimensional netted structure using thermoplastic resin. The netted structure includes a plurality of filaments which are helically and randomly entangled and partly and thermally bonded together. The netted structure is a three-dimensional plate type netted structure having an apparent density greater than a predetermined amount.
1. A three-dimensional netted structure comprising:
a netted structure being manufactured by preparing a thermoplastic resin as a raw material or a main raw material,
wherein said resin is formed into a plurality of helically and randomly entangled, partly and thermally bonded filaments by extrusion molding,
wherein said filaments are cooled with a liquid so as to obtain said netted structure, and
wherein said netted structure has sparse and dense portions arranged alternately in a direction in which said resin is extruded.
2. A method of manufacturing a three-dimensional netted structure, said method comprising the step of:
forming a three-dimensional netted structure as defined in claim 1 .
3. A three-dimensional netted structure comprising:
a netted structure being manufactured by preparing thermoplastic resin as a raw material or a main raw material,
wherein said resin is formed into a plurality of helically and randomly entangled, partly and thermally bonded filaments by extrusion molding,
wherein said filaments are cooled with a liquid so as to obtain said netted structure, and
wherein said netted structure has a single or multiple be high-density regions arranged in a direction of thickness of the netted structure along one edge or on parallel edges of the netted structure.
4. A method of manufacturing a three-dimensional netted structure, said method comprising:
forming a three-dimensional netted structure as defined in claim 3 .