Abstract: An object of the present invention is to provide a biodegradable three-dimensional network structure having excellent compression durability and high compression recovery after heat compression. The biodegradable three-dimensional network structure includes a linear fiber including a polybutylene adipate terephthalate resin having a weight average molecular weight of 35000 or more, wherein the biodegradable three-dimensional network structure has an apparent density of from 0.005 g/cm3 to 0.30 g/cm3 and a thickness of from 10 mm to 100 mm, and the linear fiber has a fiber diameter of from 0.2 mm to 2.0 mm and a crystalline melting enthalpy of 16 J/g or more.

Abstract: 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/cm3 to 0.20 g/cm3, 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.

Abstract: An object of the present invention is to provide a polyphenylene ether melt extrusion formed body which can be obtained by melt forming without mixing other resin components and has excellent properties such as mechanical strength, and a method for producing the same. The present invention relates to a polyphenylene ether melt extrusion formed body comprising a polyphenylene ether component which has a rearrangement structure having a continuous structure bonded at an ortho-position in a repeating unit continuously bonded at a para-position.

Abstract: 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/cm3 and a 40° C. compression residual strain of less than or equal to 35%.

Abstract: 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/cm3 to 0.20 g/cm3, 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.

Abstract: 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.

Abstract: A net-like structure has a three-dimensional random loop bonded structure constituted of a thermoplastic elastomer continuous linear body having a fiber size of greater than or equal to 0.1 mm and less than or equal to 3.0 mm. The net-like structure has, in the thickness direction, a solid-section fiber main region mainly including solid-section fibers, a hollow-section fiber main region mainly including hollow-section fibers, and a mixed region including solid-section fibers and hollow-section fibers in a mixed state, located between the solid-section fiber main region and the hollow-section fiber main region. Both solid-section fiber main region-side residual strain of the net-like structure and hollow-section fiber main region-side residual strain of the net-like structure are less than or equal to 20%, and the difference between the solid-section fiber main region-side residual strain and the hollow-section fiber main region-side residual strain is less than or equal to 10 points.

Abstract: 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/cm3 and a 40° C. compression residual strain of less than or equal to 35%.

Abstract: A net-like structure of the present invention is one having a three-dimensional random loop bonded structure constituted of a thermoplastic elastomer continuous linear body, wherein the net-like structure has, in a thickness direction thereof, a thin fiber main region, a thick fiber main and a mixed region that is located between the thin fiber main region and the thick fiber main region and includes the thin fibers and the thick fibers in a mixed state, the fiber size of the thick fibers is greater than that of the thin fibers by greater than or equal to 0.07 mm, and the residual strain after 750 N constant load repeated compression at pressurization from the side of the thin fiber main region of the net-like structure is less than or equal to 15%.

Abstract: 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/cm3 to 0.

Abstract: 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/cm3 and not more than 0.20 g/cm3, 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%.

Abstract: 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.

Abstract: 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/cm3 and not more than 0.20 g/cm3, 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%.

Abstract: 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/cm3 to 0.

Abstract: 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/cm3 to 0.20 g/cm3, 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.