Patent ID: 11970802
Assignee: TOYOBO CO., LTD.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D | IPC D

Claim 0:
1. A process for producing a network structure comprising:
distributing a polyester-based thermoplastic elastomer to nozzle orifices from a multi-row nozzle having a plurality of orifices,
discharging the polyester-based thermoplastic elastomer downward through the nozzle at a spinning temperature higher by not less than 20° C. and less than 120° C. than the melting point of the polyester-based thermoplastic elastomer to form continuous linear structures,
contacting the continuous linear structures each other in a molten state and thereby fusing the continuous linear structures to form a three-dimensional structure,
providing a heat-retaining region below the nozzle when the polyester-based thermoplastic elastomer is spun,
sandwiching the three-dimensional structure with a take-up conveyor net,
cooling the three-dimensional structure with cooling water in a cooling bath,
drawing out the three-dimensional structure,
draining or drying the three-dimensional structure to obtain the network structure having both surfaces or one surface smoothed, wherein
a length of the heat-retaining region is 20 mm or more,
the heat-retaining region is provided downward from a position of not more than 50 mm immediately below the nozzle,
the network structure has a 50%-constant displacement repeated compression residual strain after 80000 times of repetition of not more than 15%, and
the network structure has a 50%-compression hardness retention after 50%-constant displacement repeated compression of not less than 85%.