Composite staple fiber for absorbent article, method for producing same, thermally bonded nonwoven fabric for absorbent article, surface sheet for absorbent article, and absorbent article
A surface sheet, short fiber technology, applied in the direction of short fiber formation, absorbent pad, fiber processing, etc., can solve the problems of inability to obtain tactile feeling, insufficient non-woven fabric volume, long time, etc., and achieve good carding passability and concealment. Excellent, high bond strength effect
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Embodiment 1～10、 comparative example 1～4
[0161] The above-mentioned high-density polyethylene was used as the sheath component, and the above-mentioned polypropylene was used as the core component. In addition, the masterbatch was mixed with the polypropylene of the core component so that the content of titanium oxide in the entire short composite fiber would be the ratio described in Table 1 and Table 2. Using a concentric core-sheath composite nozzle (600 holes), adjust the prepared sheath component and core component so that the composite ratio (volume ratio) of the sheath component and the core component becomes the composite ratio described in Table 1 and Table 2 The discharge amount of each component is melt-spun. The spinning temperature of the sheath component was set at 270°C, the spinning temperature of the core component was set at 290°C, and the extruded molten filaments were pulled at the pulling speeds recorded in Table 1 and Table 2 to obtain Table 1 and Table 2. Spinning filaments of the fineness des...
Embodiment 11～12、 comparative example 5～6
[0174] Using the core-sheath type composite short fibers obtained in Examples 6 and 7 and fibers 1 to 3 shown below, thermally bonded nonwoven fabrics were produced. First, as the first fiber layer, predetermined fibers were fed into a roll card so as to form the basis weight described in Table 3, and a fiber web (first fiber layer) was produced. Then, as the second fiber layer, predetermined fibers were fed into the roll card so as to form the basis weight described in Table 3, and a fiber web (second fiber layer) was produced. The fiber web to be the second fiber layer is placed on the upper surface of the fiber web to be the first fiber layer to form a laminated fiber web. The laminated fiber web was subjected to a hot air treatment for 15 seconds using a hot air blowing device set at 135° C. to melt the sheath component and bond the core-sheath composite short fibers to obtain a thermally bonded nonwoven fabric. At this time, hot air is blown to the fiber web from the sid...
Embodiment 13～20、 comparative example 7～10
[0185] A laminated nonwoven fabric was produced using the fibers shown below. The thickness of the obtained nonwoven fabric was measured, and at the same time, in order to evaluate the adaptability to the surface sheet for absorbent articles, the run-off value (run-off), the liquid absorption speed, the liquid return test, and the measurement of the surface characteristics by the KES method were performed. and evaluation.
[0186] (1) Polyolefin-based core composite short fiber 1: the core component is the aforementioned PP-A, the sheath component is the aforementioned HDPE-A, the core-to-sheath ratio (the volume ratio of the core component / sheath component, the same below) is 65 / 35, the core The core-sheath type composite short fiber (denier: 1.4 dtex, fiber length: 38mm) arranged concentrically between the component and the sheath component.
[0187] (2) Polyolefin-based composite staple fiber 2: Concentric circular structure in which the core component is the aforementione...
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Abstract
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