Toyobo Co., Ltd.

Toyobo Mc Corporation

Shinichi Kobuchi

Hiroyuki Wakui

Teruyuki Taninaka

Akifumi Yasui

Takahiro Kuramoto

Tatsushi Okamoto

Hiroyuki Tsujii

Takanori Nakamura

Takuo Inoue

Noriki Fukunishi

Yasushi Yamada

The network structure has a three-dimensional random loop bonded structure composed of a thermoplastic elastomer continuous linear body having a fiber diameter of not less than 0.1 mm and not more than 3.0 mm, wherein the thermoplastic elastomer continuous linear body is complexed with a polyester-based thermoplastic elastomer and a polystyrene-based thermoplastic elastomer, and the network structure has a 70° C. compressive residual strain of not more than 35% and a rebound resilience of not more than 10%. Thereby, a network structure having a high vibration absorption property and being superior in thermal settling resistance is provided.

Network structure

The present invention provides a network structure having excellent repeated compression durability, the network structure having a low repeated compression residual strain and a high hardness retention after repeated compression. A network structure comprising a three-dimensional random loop bonded structure obtained by forming random loops with curling treatment of a continuous linear structure including a polyester-based thermoplastic elastomer and having a fineness of not less than 100 dtex and not more than 60000 dtex, and by making each loop mutually contact in a molten state, wherein the network structure has an apparent density of 0.005 g/cmto 0.20 g/cm, a 50%-constant displacement repeated compression residual strain of not more than 15%, and a 50%-compression hardness retention of not less than 85% after 50%-constant displacement repeated compression.

Fibrous network structure having excellent compression durability

A net structure manufacturing apparatus () comprising: a nozzle () having a discharge hole () from which melted thermoplastic resin is extruded so as to be formed as a filament; a water tank () disposed below the nozzle (); a conveying device () provided to the water tank () and configured to convey a net structure () having a resin as the filament (); and a gas ejection device () provided to the water tank () and configured to eject gas.

Net structure manufacturing apparatus and net structure manufacturing method

To provide a net-like structure having excellent low resilience characteristics, cushioning properties, and durability. The net-like structure has a three-dimensional random loop bonded structure constituted of a continuous linear body made of a thermoplastic elastomer having a fiber diameter of 0.1-3.0 mm and a styrene content of 10-40 mass %, the net-like structure having an apparent density of 0.005-0.30 g/cmand a 40&#xb0; C. compression residual strain of less than or equal to 35%.

Net-like structure having excellent low resilience characteristics

The present invention provides an elastic network structure that has excellent cushioning properties and makes less sound when it is compressed and recovers its shape. A network structure including a three-dimensional random loop bonded structure obtained by forming random loops by curling treatment of a continuous linear structure comprising a thermoplastic resin, and by making each loop mutually contact in a molten state to weld the majority of contacted parts, wherein (a) the continuous linear structure is a hollow cross section, (b) the degree of hollowness of the hollow cross section is not less than 10% and not more than 50%, (c) the fiber diameter of the continuous linear structure is not less than 0.10 mm and not more than 0.65 mm, and (d) the number of bonded points per unit weight of the random loop bonded structure is not less than 200/g and less than 500/g.

Elastic network structure with excellent quietness and lightweight properties

The present invention provides a network structure having excellent repeated compression durability, a low repeated compression residual strain and a high hardness retention after repeated compression. A network structure made of a three-dimensional random loop bonded structure obtained by forming random loops with curling treatment of a continuous linear structure including at least one thermoplastic elastic resin selected from the group consisting of a polyolefin-based thermoplastic elastomer, an ethylene-vinyl acetate copolymer, a polyurethane-based thermoplastic elastomer and a polyamide-based thermoplastic elastomer, the continuous linear structure having a fineness of not less than 100 dtex and not more than 60000 dtex, and by making each loop mutually contact in a molten state, wherein The network structure has an apparent density of 0.005 g/cmto 0.20 g/cm, a 50%-constant displacement repeated compression residual strain of not more than 15%, and a 50%-compression hardness retention after 50%-constant displacement repeated compression of not less than 85%.

Network structure having excellent compression durability

A network structure is disclosed including a three-dimensional random loop bonded structure obtained by forming random loops with curling treatment of a continuous linear structure including at least one thermoplastic elastomer selected from a polyester-based thermoplastic elastomer, a polyolefin-based thermoplastic elastomer, and an ethylene-vinyl acetate copolymer, and by making each loop mutually contact in a molten state, wherein a fiber diameter of the continuous linear structure is not less than 0.1 mm and not more than 3.0 mm, a fiber diameter of a surface layer portion of the network structure is not less than 1.05 times of a fiber diameter of an inner layer portion thereof, an apparent density is not less than 0.01 g/cmand not more than 0.20 g/cm, 750 N-constant load repeated compression residual strain is not more than 15%, and 40%-compression hardness retention after 750 N-constant load repeated compression is not less than 55%.

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Osaka, Japan

Shinichi Kobuchi