Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a nonwoven fabric of which the fluffing is suppressed and which has good mild feeling to the skin. SOLUTION: The method for producing the nonwoven fabric 10 having unevenness on the surface includes forming bound web 10b by blowing hot air by air-through method to a web 10a containing a thermally extensible fiber composed of a conjugate fiber containing a high-melting point component and a low-melting point component having the melting point lower than that of the high-melting point component, and extending the length by heating, and embossing the bound web 10b by an embossing part 50 having an emboss roll 51 and a flat roll 52. The temperature of the hot air blown to the web is set to a temperature not lower than the melting point of the low-melting point component and lower than the melting point of the high-melting point component. In the embossing, the hot air-blown surface in the bound web 10b is brought into contact with the emboss roll 51 and the opposite surface of the hot air-blown surface is brought into contact with the flat roll 52. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for processing a fiber sheet to obtain the processed fiber sheet having good bulkiness, good hand, and enhanced resilience. SOLUTION: This method for processing the fiber sheet is characterized by drawing out the fiber sheet 10 containing the layer of an air-through nonwoven fabric from a raw fabric 8 wound in a roll-like state, blowing hot gas heated at a temperature below the melting point of the fibers constituting the fiber sheet 10 and above (the melting point-50°C) on the fiber sheet by an air-through method, and then applying a calendering process to the fiber sheet 10 under a condition of a linear pressure 20 to 700 N/cm. The calendering process is preferably carried out with a metal calender roll 6 and a roll 7 having a D hardness (JIS K6253) of 40 to 100 degree. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To obtain a substrate which comprises a multi-layered structure that contains hydrophilic fibers in at least one layer sheet and is produced by laminating uneven sheets to each other and then subjecting the laminate to a pressing treatment, or the like, has a specific peeling strength and a specific thickness, has an uneven shape, expresses a bulky and sufficient thick touch, gives a good wiping touch and is useful for wet sheets. SOLUTION: This substrate for wet sheets comprises a multi-layered structure which contains hydrophilic fibers such as cellulosic fibers or thermoplastic resin fibers in at least one layer sheet and is produced by laminating two or more different or same uneven sheets to each other and then partially subjecting the laminate to a pressing or fusing treatment preferably so as to have regions where adjacent uneven sheets are joined to each other, and has an interlayer peeling strength of >=50 cN/75 mm and a thickness of 0.3 to 5 mm.
Abstract:
PROBLEM TO BE SOLVED: To provide a confortable feeling of wearing, being pleasant to the skin of a user and to improve feel and dry sense by making structures of nonwoven fabrics different on the central part and both side parts of a surface sheet as a face being brought into contact with the skin of an absorptive article and making structure of opening holes provided on the central part three- dimensional. SOLUTION: A sanitary napkin 100 is prepd. by placing a main body 110 having a liq. retentive absorptive part 104 between a surface sheet 1 as a liq.- permeable skin contacting face and a back face sheet as a liq.-non-permeable non-skin contacting face. This surface sheet 1 comprises a nonwoven fabric consisting of a part (a region A) with a number of opening holes 6 provided at approximately central part and a part (a region B) with no opening part 6 provided on both side parts. In addition, the opening holes 6 are formed by surrounding them with a nonwoven fabric extending from the surface 8A to the back face 8B of the surface sheet 1 and a part between adjoining opening holes 6 is curved into a projected shape so as to have a top part 5. In addition, the ratio of emboss treatment applied on the region B is pef. 8-70%.
Abstract:
PURPOSE: To provide both a method for producing a solid porous sheet having a structure capable of effectively actualizing liquid movement from the surface layer to the back layer and a device for the method. CONSTITUTION: In a method for producing a solid porous sheet having a great number of solid holes by laying a sheet between a first pressing mold having a great number of projected pins 20 in a line state in many rows and a second pressing mold having a recessed mold to be fitted to the projected pins 20 or projected parts to be fitted to spaces between the many rows, projected pins 20 comprising columnar base parts 12, conical tip parts 14 and collar parts 18 extending in the direction approximately perpendicular to the axial direction of the base parts 12 at the approximately boundary parts between the base parts and the tip parts 14 are used as the projected pins 20. Pins comprising the tip parts 14 composed of bottom parts 40 and top parts 42 and having the tip angles at the top parts larger than the crossing angles of the extension lines of mutually opposing two ridgelines at the bottom parts in the top part directions can be also used as the projected pins 20.
Abstract:
PURPOSE:To obtain nonwoven fabric surely permeating excrement, certainly preventing leakage, having performance of suppressing return of humor, excellent touch, etc., by integrating two fiber webs containing thermoplastic fibers by a specific method. CONSTITUTION:First, a first fiber web 11'' containing a thermoplastic fibers is placed on an air-permeable conveyor 51 having unevenness. When the web is transported, a gas is sprayed upon the surface of the web 11'' from a device 53 to form uneven parts on the web 11''. Then a second fiber web 12' containing thermoplastic fibers is laid under the uneven parts of the web 11'', both the webs are heat-treated by a heat-treating part 120 and integrated t give nonwoven fabric 10 comprising an upper layer fiber web 11 which has wholly dispersed protruded parts 11A1 and dented parts 11A2 at the central part 11A wherein the dented parts 11A2 have a lower fiber aggregation density than the protruded parts 11A1 and a lower layer fiber web 12 which has uniform fiber aggregation density and exists at least at positions of the protruded and the dented parts 11A1 and 11A2.
Abstract:
PURPOSE:To obtain the title article suitable as paper, etc., by making conjugate yarn of plural resins having different melting points into web, integrating central part treated into hydrophilic nature with both end parts processed into hydrophobic nature and uniformly forming uneven parts at the central part. CONSTITUTION:Resins such as polyethylene terephthalate and polyethylene having preferably >=30 deg.C difference in melting point, for example, are made into conjugate yarn of sheath core type. The conjugate yarn is subjected to surface treatment with a hydrophilic surfactant such as metal salt of an alkyl sulfate and processed into a beltlike web, which is then sprayed with air and unevenness is formed on the surface to give central part. On the other hand, the conjugate yarn subjected to surface treatment with a hydrophobic surfactant such as silicone is made into beltlike webs, arranged at both sides of the central part, the parts are heat-treated and the low-melting component is thermally melted to give the objective nonwoven fabric 10 having the central parts 11 with protruded parts 11A and dented parts 11B and both the end parts 12.
Abstract:
PURPOSE:To obtain the nonwoven fabric capable of blocking flow of high- viscosity fluid while excellent in permeability, thus useful for paper diapers, etc., by forming unevennesses on a fibrous web by specific means followed by heat fusing of the thermoplastic fiber contained in the web. CONSTITUTION:A fibrous web 2 containing thermoplastic fiber is brought between air-permeable conveyor belts 41 one or both of the surfaces of which have unevennesses, and during carrying said web 2 sandwiched between the conveyor belts, air is blown on the surface of said web 2 to force said web to follow the recesses of the conveyor belts 41 to effect formation of unevennesses on the web 2 followed by heating the web 2 to effect fusing of the thermoplastic fiber, thus obtaining the objective nonwoven fabric.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a nonwoven fabric excellent for retaining an irregular shape of an obtained nonwoven fabric and free from a problem of retaining a shape of the obtained nonwoven fabric.SOLUTION: A method for manufacturing a nonwoven fabric comprises shaping a web 5 into an irregular shape by fitting the web 5 to a substrate 10. Specifically, the method comprises the steps of: conveying a web 5 containing a thermoplastic fiber to a substrate 10 having an irregular shape (a projecting part 10T and a ventilation part 10H); blowing hot wind toward the substrate 10 from above the web 5 to shape the web 5 into an irregular shape. The blow of the hot wind comprises: blowing a first hot wind W1; blowing the first hot wind W1 and temporarily fusing the fibers of the web 5 with each other so that the irregular shape of the web 5 can be retained; blowing a second hot wind W2 having a temperature higher than the first one and fusing the fibers of the web 5 with each other with the irregular shape of the web 5 being retained so that the irregular shape of the web 5 can be fixed.
Abstract:
PROBLEM TO BE SOLVED: To provide a three-dimensional sheet for an absorptive article, which is excellent in the stability of the three-dimensional shape of a projected part and the guiding property of liquid to an open hole. SOLUTION: The three-dimensional sheet 1 for the absorptive article is composed of nonwoven fabric 10 having many ridge parts (projected parts) 2 and having the open holes 31 formed between the ridge parts (projected parts) 2 adjacent to each other, and at least a part 21 of the ridge parts (projected parts) 2 is made into a film. For the ridge parts 2 in a desirable three-dimensional sheet 1, the side face of the ridge part 2 is made into a film and the peak part of the ridge part 2 is not made into a film. COPYRIGHT: (C)2007,JPO&INPIT