JP2012144834A5 - - Google Patents

Claims (10)

A method for producing a nonwoven fabric that conveys a web containing thermoplastic fibers onto a support having an uneven shape, and blows hot air toward the support from the top of the web to shape the uneven shape on the web,
Temporarily fusing the fibers of the web to each other so as to maintain the concavo-convex shape of the web along the concavo-convex shape of the support by blowing the first hot air;
A step of blowing the second hot air at a temperature higher than the first, and fixing the uneven shape by fusing the fibers of the web in a state where the uneven shape is maintained,
A method for producing a nonwoven fabric, in which an uneven shape is formed on a web along a support. The fiber of the web is a composite fiber having a low melting point component and a high melting point component having a higher melting point than the low melting point component,
2. The method for producing a nonwoven fabric according to claim 1, wherein the first hot air is hot air having a temperature of 60 ° C. lower than the melting point of the low melting point component of the web and a temperature of 15 ° C. lower than the melting point of the low melting point component.   The method for producing a nonwoven fabric according to claim 2, wherein the second hot air is hot air having a temperature not lower than the melting point of the low melting point component of the web and not higher than 40 ° C higher than the melting point of the low melting point component.   The said composite fiber is a manufacturing method of the nonwoven fabric of Claim 2 or Claim 3 which used polyethylene terephthalate or polylactic acid for the said high melting point component for the said low melting point component.   The method for producing a nonwoven fabric according to any one of claims 1 to 4, wherein the first hot air and the second hot air are sucked through the web and the support. The method for producing a nonwoven fabric according to any one of claims 1 to 5, wherein the support has a rotatable drum shape. The web is sandwiched between the support and an air-permeable aerating conveyor disposed opposite to the support surface when the first hot air is blown or when the first and second hot air is blown. Is conveyed on the surface of the support,
The method for producing a nonwoven fabric according to any one of claims 1 to 6, wherein the first hot air or the first and second hot air is blown onto the web through the aeration conveyor. The nonwoven fabric according to any one of claims 1 to 7, wherein a cooling gas is blown onto the web after the second hot air is blown to cool the web, and the web is peeled off from the support. Manufacturing method.   The nonwoven fabric manufactured by the manufacturing method of the nonwoven fabric in any one of Claims 1-8. A support having a protruding portion and a ventilation portion, transporting a web containing thermoplastic fibers on the surface having the protruding portion, and a nozzle for blowing hot air along the web to the support; , An apparatus for manufacturing a nonwoven fabric that shapes an uneven shape on the web,
The nozzle includes a first nozzle that blows first hot air, and a second nozzle that blows second hot air having a temperature higher than that of the first hot air,
The first nozzle temporarily fuses the fibers of the web by blowing the first hot air so that the uneven shape along the protruding portion is maintained.
The said 2nd nozzle is a manufacturing apparatus of the nonwoven fabric which fuses the fibers of the said web and fixes the said uneven | corrugated shape in the state which hold | maintained the said uneven | corrugated shape by blowing of the said 2nd hot air.