TW201700813A

TW201700813A - Non-woven fabric for absorbent article

Info

Publication number: TW201700813A
Application number: TW105113117A
Authority: TW
Inventors: 宇田匡志; 坂口智; 深山拓也
Original assignee: 優你嬌美股份有限公司
Priority date: 2015-05-29
Filing date: 2016-04-27
Publication date: 2017-01-01
Also published as: CN107613924B; CN107613924A; JP2016220987A; JP6289418B2; WO2016194246A1; TWI675138B

Abstract

The present invention relates to a non-woven fabric that is for an absorbent article and that includes a fiber layer containing thermoplastic resin fibers and a fiber layer containing thermoplastic resin fibers and cotton. The present invention provides a non-woven fabric for an absorbent article having excellent strength, flexibility, and liquid permeability with respect to body fluids such as urine and menstrual blood. The non-woven fabric (1) for an absorbent article comprises at least two fiber layers including: a first fiber layer (2) containing cotton (2a) and thermoplastic resin fibers (2b); and a second fiber layer that is adjacent to at least one surface of the first fiber layer (2), that contains thermoplastic resin fibers (3a), and that does not contain cotton. The thermoplastic resin fibers (2b) included in the first fiber layer (2) have a smaller fiber diameter than the thermoplastic resin fibers (3a) included in the second fiber layer (3). The non-woven fabric (1) has a specific structure provided with a plurality of protrusions (4) and grooves (5).

Description

吸收性物品用不織布 Non-woven fabric for absorbent articles

本發明係關於使用於用後即棄式紙尿布、衛生棉、失禁墊等的吸收性物品之不織布。 The present invention relates to a non-woven fabric for an absorbent article used in disposable disposable diapers, sanitary napkins, incontinence pads and the like.

用後即棄式紙尿布、衛生棉等的吸收性物品，為了獲得天然素材所帶來的安心感等，作為使用於表面薄片等的構件之不織布，正在探討含有棉(天然纖維)的不織布。 A non-woven fabric containing cotton (natural fiber) is being considered as a non-woven fabric for a member such as a surface sheet or the like, in order to obtain a feeling of security such as a surface sheet or the like, in an absorbent article such as a disposable diaper or a sanitary napkin.

作為這種不織布，例如專利文獻1提出一種短纖維不織布，係在主要為纖維長度5mm的棉絨所構成的層之至少單面積層熱塑性樹脂纖維等的短纖維所構成的層而成，讓短纖維彼此、棉絨彼此、及棉絨與短纖維相互進行三維地纏絡而成為一體化。 As such a non-woven fabric, for example, Patent Document 1 proposes a short-fiber non-woven fabric which is formed of a layer composed of short fibers of at least a single-layer thermoplastic resin fiber of a layer mainly composed of lint having a fiber length of 5 mm, and is short. The fibers, the lint, and the lint and the short fibers are three-dimensionally entangled with each other to be integrated.

[專利文獻1]日本特開2001-32157號公報 [Patent Document 1] Japanese Patent Laid-Open Publication No. 2001-32157

然而，像專利文獻1所揭示之不織布那樣包含：由熱塑性樹脂纖維等的短纖維所構成的纖維層、及由熱塑性樹脂纖維等的短纖維及棉所構成的纖維層之積層不織布，起因於短纖維和棉之化學性質的差異(例如，疏水性、親水性等)、物理性質的差異(例如，剛性不同等)等，短纖維與棉之纏絡較弱，短纖維與棉容易解離，當將這種積層不織布運用於吸收性物品等之伴隨有構造變化(變形)之製品的情況，可能因為製品的構造變化(變形)而在含有棉之纖維層內使短纖維和棉解離，誘發該纖維層的***(分解)、其與鄰接的纖維層之間的層間剝離，而造成積層不織布的強度降低。特別是當上述積層不織布運用於吸收性物品的情況，若構成積層不織布之纖維層產生***(分解)、層間剝離，會發生起毛，或導致供應給吸收性物品之尿、經血等的體液之液體轉移性變差。 However, the non-woven fabric disclosed in Patent Document 1 includes a fiber layer composed of short fibers such as thermoplastic resin fibers, and a laminated nonwoven fabric composed of short fibers such as thermoplastic resin fibers and cotton, which are caused by short Differences in the chemical properties of fibers and cotton (eg, hydrophobicity, hydrophilicity, etc.), differences in physical properties (eg, different stiffness, etc.), short fibers and cotton are weaker, and short fibers and cotton are easily dissociated. When such a laminated non-woven fabric is applied to an article having a structural change (deformation) such as an absorbent article or the like, the short fiber and the cotton may be disintegrated in the fiber layer containing cotton due to structural change (deformation) of the product, and the The splitting (decomposition) of the fibrous layer, and the interlayer peeling between the adjacent fibrous layers cause a decrease in the strength of the laminated nonwoven fabric. In particular, when the laminated non-woven fabric is applied to an absorbent article, if the fibrous layer constituting the laminated non-woven fabric is split (decomposed) or peeled off between the layers, fuzzing may occur, or a liquid of a body fluid such as urine or menstrual blood supplied to the absorbent article may be caused. The transferability is worse.

此外，因為棉纖維的剛性較高，若纖維層中所含的棉量變多，纖維層的柔軟性會降低，含有該纖維層之積層不織布的緩衝性、觸感、對於身體形狀之追隨性等可能會降低。 Further, since the rigidity of the cotton fiber is high, the amount of cotton contained in the fiber layer is increased, the flexibility of the fiber layer is lowered, and the cushioning property, the tactile sensation, the followability to the body shape, and the like of the laminated non-woven fabric containing the fiber layer are reduced. May be reduced.

於是，本發明的目的是為了提供一種吸收性物品用不織布，係含有由熱塑性樹脂纖維所構成的纖維層、以及由熱塑性樹脂纖維及棉所構成的纖維層之吸收性物品用不織布，其強度和柔軟性優異，且對於尿、經血等的體液之液體透過性也很優異。 Accordingly, an object of the present invention is to provide a non-woven fabric for an absorbent article, which comprises a fibrous layer composed of a thermoplastic resin fiber and a nonwoven fabric for an absorbent article comprising a fibrous layer composed of a thermoplastic resin fiber and cotton, and has a strength and It is excellent in flexibility, and is also excellent in liquid permeability to body fluids such as urine and menstrual blood.

本發明的一態樣(態樣1)之吸收性物品用不織布，係包含第1纖維層及第2纖維層之由至少2層的纖維層所構成之吸收性物品用不織布，該第1纖維層係含有棉及熱塑性樹脂纖維；該第2纖維層係與前述第1纖維層的至少單面鄰接，含有熱塑性樹脂纖維且不含棉；前述第1纖維層所含的前述熱塑性樹脂纖維之纖維直徑，係比前述第2纖維層所含的前述熱塑性樹脂纖維之纖維直徑更細；前述不織布具有第1面及第2面，該第1面係由前述第1纖維層以外的纖維層所形成，該第2面係由前述第1纖維層所形成且位於與前述第1面的相反側；前述不織布具有複數個凸部及複數個溝槽部，該複數個凸部，係在前述不織布的前述第1面上朝第1方向延伸設置且在與前述第1方向正交的第2方向隔著預定的間隔設置，並朝向前述第1面的方向突出；該複數個溝槽部，是朝前述第1方向延伸設置且設置於在前述第2方向上相鄰的前述凸部之間，並朝向前述第2面的方向凹陷；前述溝槽部具有第1凹部及複數個第2凹部，該第1凹部具備有第1底部，該第1底部位於比前述凸部之頂部之前述第1面側的位置更靠前述第2面側；該複數個第2凹部，係在前述第1凹部內沿前述第1方向不連續地設置，且從前述第1底部朝向前述第2面的方向凹陷；前述第2凹部具備周壁部及第2底部，該周壁部係從前述第1底部朝向前述第2面側的方向延伸設置；該第2底部係在前述周壁部之前述第2面側的端部設置成封閉該端部，且在前述不織布當中具有最高的纖維密度。 A non-woven fabric for an absorbent article according to one aspect of the present invention is a non-woven fabric for an absorbent article comprising at least two fiber layers of a first fiber layer and a second fiber layer, the first fiber The layer contains cotton and a thermoplastic resin fiber; the second fiber layer is adjacent to at least one surface of the first fiber layer, and contains thermoplastic resin fibers and does not contain cotton; and the fiber of the thermoplastic resin fiber contained in the first fiber layer The diameter is smaller than the fiber diameter of the thermoplastic resin fiber contained in the second fiber layer; the nonwoven fabric has a first surface and a second surface, and the first surface is formed of a fiber layer other than the first fiber layer. The second surface is formed by the first fiber layer and located on a side opposite to the first surface; the nonwoven fabric has a plurality of convex portions and a plurality of groove portions, and the plurality of convex portions are attached to the non-woven fabric The first surface extends in the first direction and is disposed at a predetermined interval in a second direction orthogonal to the first direction, and protrudes in a direction toward the first surface; the plurality of groove portions are The first direction extension Provided between the convex portions adjacent to each other in the second direction and recessed toward the second surface; the groove portion has a first concave portion and a plurality of second concave portions, and the first concave portion has the first portion The bottom portion is located on the second surface side at a position on the first surface side of the top portion of the convex portion, and the plurality of second concave portions are discontinuous in the first direction in the first concave portion Provided to be recessed from the first bottom portion toward the second surface; the second recess portion includes a peripheral wall portion and a second bottom portion extending from the first bottom portion toward the second surface side; The second bottom portion is on the second surface side of the peripheral wall portion The ends are arranged to close the ends and have the highest fiber density among the aforementioned nonwoven fabrics.

依據該態樣1的吸收性物品用不織布，第1纖維層所含的熱塑性樹脂纖維之纖維直徑，係比第2纖維層所含的熱塑性樹脂纖維之纖維直徑更細，因此第1纖維層所含的纖維直徑較細的熱塑性樹脂纖維容易與前述第1纖維層所含的棉、前述第2纖維層所含的熱塑性樹脂纖維進行纏絡，而抑制上述般之纖維層的***、各纖維層間的層間剝離發生，縱使不織布是含有棉作為構成成分，仍可發揮其作為不織布之優異的強度。 According to the non-woven fabric for an absorbent article of the first aspect, the fiber diameter of the thermoplastic resin fiber contained in the first fiber layer is smaller than the fiber diameter of the thermoplastic resin fiber contained in the second fiber layer, and therefore the first fiber layer is The thermoplastic resin fiber having a fine fiber diameter is likely to be entangled with the cotton contained in the first fiber layer and the thermoplastic resin fiber contained in the second fiber layer, thereby suppressing splitting of the above-mentioned fiber layer and between the fiber layers. Inter-layer peeling occurs, and even if the non-woven fabric contains cotton as a constituent component, it can exhibit its excellent strength as a non-woven fabric.

此外，態樣1的吸收性物品用不織布，藉由具有上述特定的凸部及溝槽部之構造，亦即，前述溝槽部具有第1凹部及第2凹部，該第1凹部具備有第1底部，該第1底部位於比前述凸部之頂部之第1面側的位置更靠第2面側；該第2凹部具備有周壁部及第2底部，該周壁部係從前述第1底部朝向前述第2面側的方向延伸設置；該第2底部係在前述周壁部之前述第2面側的端部設置成封閉該端部，且在前述不織布當中具有最高的纖維密度，因此前述凸部及第1凹部的纖維密度相對較低，此外，從前述不織布的第1面側施加之厚度方向的應力可藉由前述第1凹部朝向前述第2面側的彎曲而予以緩衝，縱使是含有棉作為構成成分之不織布，仍可確保充分的柔軟性。 Further, in the absorbent article for an absorbent article of the first aspect, the first concave portion and the second concave portion are provided by the first concave portion and the second concave portion, and the first concave portion is provided with the first nonwoven portion and the second concave portion. a bottom portion, the first bottom portion is located on a second surface side of a position on a first surface side of the top portion of the convex portion, and the second concave portion includes a peripheral wall portion and a second bottom portion, wherein the peripheral wall portion is from the first bottom portion The second bottom portion is provided at an end portion on the second surface side of the peripheral wall portion so as to close the end portion, and has the highest fiber density among the nonwoven fabrics. The fiber density in the thickness direction of the first concave portion is relatively low, and the stress in the thickness direction applied from the first surface side of the nonwoven fabric can be buffered by the bending of the first concave portion toward the second surface side, even if it is contained Cotton is used as a non-woven fabric to ensure sufficient flexibility.

再者，配置於前述凸部之間的第2底部之纖維密度相對較高，而使前述第1纖維層所含之纖維直徑較細的熱塑性樹脂纖維與前述第1纖維層所含的棉、前述第2纖維層所含的熱塑性樹脂纖維可更緊密地纏絡，因此在該第2底部中，更不容易發生上述般之纖維層的***、各纖維層間的層間剝離。在不織布中，藉由將這種更不容易發生纖維層的***、各纖維層間的層間剝離的部分(亦即第2底部)局部地設置複數個，縱使上述般之纖維層的***、各纖維層間的層間剝離局部地發生，在前述第2底部中仍不會發生纖維層的***、各纖維層間的層間剝離，而能有效地防止不織布整體之強度降低。 Further, the fiber density of the second bottom portion disposed between the convex portions is relatively high, and the fiber diameter of the first fiber layer is relatively fine. The resin fiber is more closely entangled with the cotton contained in the first fiber layer and the thermoplastic resin fiber contained in the second fiber layer. Therefore, in the second bottom portion, the fiber layer as described above is less likely to occur. Splitting, interlayer peeling between layers of fibers. In the non-woven fabric, by splitting a portion in which the fiber layer is more likely to be split and the interlayer between the fiber layers is peeled off (i.e., the second bottom portion), the fiber layer is split and the fibers are separated. The interlayer peeling between the layers occurs locally, and the splitting of the fiber layer and the interlayer peeling between the fiber layers are not caused in the second bottom portion, and the strength of the entire nonwoven fabric can be effectively prevented from being lowered.

而且，態樣1的吸收性物品用不織布的構造，係在厚度方向上，從纖維密度相對低的凸部到纖維密度最高的第2凹部之第2底部存在有密度梯度，因此從前述不織布的第1面側供給的尿、經血等的體液，容易從不織布的第1面側之凸部透過第2底部往第2面側導入，而能發揮作為吸收性物品用不織布之優異的吸收性(特別是吸收速度、液體轉移性等)。 Further, the non-woven fabric structure for an absorbent article of the first embodiment has a density gradient from a convex portion having a relatively low fiber density to a second bottom portion of a second concave portion having the highest fiber density in the thickness direction, so that the nonwoven fabric is not woven from the nonwoven fabric. The body fluid such as urine or menstrual blood supplied from the first surface side is easily introduced from the convex portion on the first surface side of the non-woven fabric through the second bottom portion to the second surface side, and exhibits excellent absorbability as a non-woven fabric for absorbent articles ( In particular, absorption speed, liquid transferability, etc.).

本發明的其他態樣(態樣2)的吸收性物品用不織布，是在前述態樣1的吸收性物品用不織布中，前述周壁部係具有：沿著前述第1方向之一對的第1周壁部、以及沿著前述第2方向之一對的第2周壁部，在前述一對的第1周壁部之至少一方具備：通到前述第2面之孔部。 According to another aspect of the invention, in the non-woven fabric for an absorbent article according to the aspect 1, the peripheral wall portion has the first pair of the first direction. The peripheral wall portion and the second peripheral wall portion along one of the pair of second circumferential directions have at least one of the pair of first peripheral wall portions: a hole that opens to the second surface.

依據該態樣2的吸收性物品用不織布，利用前述第1周壁部的孔部，可將形成相鄰的凸部之纖維的張力予以釋放，因此凸部整體或是形成凸部之纖維的移動自由度提高，而使前述凸部的柔軟性更加提昇。 According to the non-woven fabric for an absorbent article according to the second aspect, the tension of the fibers forming the adjacent convex portions can be released by the hole portions of the first peripheral wall portion, so that the entire convex portion or the fiber forming the convex portion can be moved. from The degree of improvement is increased, and the flexibility of the aforementioned convex portion is further improved.

本發明的其他態樣(態樣3)的吸收性物品用不織布，是在前述態樣1或2的吸收性物品用不織布中，前述不織布的第1面係由前述第1纖維層以外的纖維層所形成。 In the non-woven fabric for absorbent articles according to the aspect 1 or 2 of the aspect of the invention, the first surface of the nonwoven fabric is a fiber other than the first fiber layer. The layer is formed.

依據該態樣3的吸收性物品用不織布，作為吸收性物品之穿戴者的皮膚抵接面使用之不織布的第1面，係由含棉之第1纖維層以外的纖維層所形成，因此可防止棉所造成的觸感惡化、柔軟性降低等，而能保持作為不織布之優異的觸感及柔軟性。 According to the non-woven fabric for an absorbent article according to the third aspect, the first surface of the non-woven fabric used as the skin contact surface of the wearer of the absorbent article is formed of a fiber layer other than the first fibrous layer containing cotton. It is possible to prevent the tactile sensation and the softness of the nonwoven fabric from being deteriorated by the cotton, and the softness is lowered.

本發明的其他態樣(態樣4)的吸收性物品用不織布，是在態樣1~3之任一吸收性物品用不織布中，前述第2凹部之在第2方向的節距為1.5mm以下。 In another aspect of the invention, in the non-woven fabric for an absorbent article according to the aspect 4, the second recess has a pitch of 1.5 mm in the second direction. the following.

依據該態樣4的吸收性物品用不織布，由於前述第2凹部之在前述第2方向的節距為1.5mm以下，前述第1纖維層內的棉容易被保持於前述第2凹部的第2底部，在該第2底部中更不容易發生上述般的纖維層的***、各纖維層間的層間剝離。因此，可獲得強度及液體透過性特別優異的不織布。 According to the non-woven fabric for an absorbent article of the fourth aspect, the pitch of the second concave portion in the second direction is 1.5 mm or less, and the cotton in the first fiber layer is easily held by the second concave portion. In the bottom portion, the above-described fiber layer splitting and interlayer peeling between the fiber layers are less likely to occur in the second bottom portion. Therefore, a nonwoven fabric excellent in strength and liquid permeability can be obtained.

本發明的其他態樣(態樣5)的吸收性物品用不織布，是在態樣1~4之任一吸收性物品用不織布中，前述不織布係包含：形成前述第2面之前述第1纖維層、與該第1纖維層的第1面側之面鄰接之前述第2纖維層、以及與該第2纖維層的第1面側之面鄰接之第3纖維層，該第3纖維層含有熱塑性樹脂纖維且不含棉；各纖維層之熱塑性樹脂纖維的基重相同，前述第3纖維層所含的熱塑性樹脂纖維之纖維直徑，係與前述第2纖維層所含的熱塑性樹脂纖維之纖維直徑相同或更大。 According to another aspect of the invention, in the non-woven fabric for an absorbent article according to any one of the aspects 1 to 4, the nonwoven fabric includes the first fiber forming the second surface. a layer, a second fiber layer adjacent to a surface on a first surface side of the first fiber layer, and a third fiber layer adjacent to a surface on a first surface side of the second fiber layer, The third fiber layer contains thermoplastic resin fibers and does not contain cotton; the thermoplastic resin fibers of the respective fiber layers have the same basis weight, and the fiber diameter of the thermoplastic resin fibers contained in the third fiber layer is the same as that of the second fiber layer. The thermoplastic resin fibers have the same or larger fiber diameters.

一般而言，含有棉的纖維層，當棉原料的纖維解離時，容易殘存無法完全解離的棉塊，這種棉塊，成為與周圍的纖維之纏絡鬆開的原因，結果可能造成纖維層的強度降低。然而，依據上述態樣5的吸收性物品用不織布構成為，各纖維層之熱塑性樹脂纖維的基重相同，且前述第2纖維層及前述第3纖維層所含的熱塑性樹脂纖維之纖維直徑，比前述第1纖維層所含的熱塑性樹脂纖維更大，因此前述第1纖維層所含的熱塑性樹脂纖維之纖維量(纖維根數)比前述第2纖維層及前述第3纖維層更多，而能使含有棉之前述第1纖維層的強度提高。此外，態樣5之吸收性物品用不織布的構造，在厚度方向上，從第1面到第2面(亦即，從第3纖維層到第1纖維層)存在有纖維量(纖維根數)變多的纖維量梯度(或是，從第1面到第2面(從第3纖維層到第1纖維層)存在有纖維密度增大之纖維密度梯度)，因此供應給前述不織布的第1面側之面的尿、經血等的體液，容易從前述不織布的第1面側往第2面側導入，可發揮作為吸收性物品用不織布之更優異的吸收性(特別是吸收速度、液體轉移性等)。 In general, when a fiber layer containing cotton is dissociated from the fibers of the cotton raw material, it is easy to remain a cotton lump which cannot be completely dissociated, and the cotton lump becomes a cause of loosening of the entanglement with the surrounding fibers, and as a result, the fiber layer may be caused. The strength is reduced. However, the nonwoven fabric for an absorbent article according to the above aspect 5 is configured such that the basis weight of the thermoplastic resin fibers of the respective fiber layers is the same, and the fiber diameter of the thermoplastic resin fibers contained in the second fiber layer and the third fiber layer is The amount of fibers (the number of fibers) of the thermoplastic resin fibers contained in the first fiber layer is larger than that of the second fiber layer and the third fiber layer, and is larger than the thermoplastic resin fibers contained in the first fiber layer. Further, the strength of the first fibrous layer containing cotton can be improved. Further, in the structure of the non-woven fabric for the absorbent article of the aspect 5, the amount of fibers (the number of fibers) is present in the thickness direction from the first surface to the second surface (that is, from the third fibrous layer to the first fibrous layer). a fiber gradient having a large amount (or a fiber density gradient having an increased fiber density from the first surface to the second surface (from the third fibrous layer to the first fibrous layer), and therefore supplied to the nonwoven fabric The body fluid such as urine or menstrual blood on the surface of the first side is easily introduced from the first surface side of the nonwoven fabric to the second surface side, and exhibits superior absorbability (especially absorption speed, liquid) as a non-woven fabric for absorbent articles. Transferability, etc.).

依據本發明，可提供一種吸收性物品用不織布，係包含：由熱塑性樹脂纖維所構成的纖維層、以及由熱塑性樹脂纖維及棉所構成的纖維層之吸收性物品用不織布，其強度和柔軟性優異，且對於尿、經血等的體液之液體透過性也很優異。 According to the present invention, there is provided a nonwoven fabric for an absorbent article comprising: a fibrous layer composed of a thermoplastic resin fiber; and a nonwoven fabric for an absorbent article comprising a fibrous layer composed of a thermoplastic resin fiber and cotton, and having strength and flexibility. It is excellent, and is also excellent in liquid permeability to body fluids such as urine and menstrual blood.

1‧‧‧吸收性物品用不織布 1‧‧‧ Non-woven fabric for absorbent articles

2‧‧‧第1纖維層 2‧‧‧1st fibrous layer

2a‧‧‧棉 2a‧‧‧ cotton

2b‧‧‧熱塑性樹脂纖維 2b‧‧‧ thermoplastic resin fiber

3‧‧‧第2纖維層 3‧‧‧2nd fibrous layer

3a‧‧‧熱塑性樹脂纖維 3a‧‧‧ thermoplastic resin fiber

4‧‧‧凸部 4‧‧‧ convex

41‧‧‧頂部 41‧‧‧ top

5‧‧‧溝槽部 5‧‧‧ Groove

51‧‧‧第1凹部 51‧‧‧1st recess

51a‧‧‧第1底部 51a‧‧‧1st bottom

52‧‧‧第2凹部 52‧‧‧2nd recess

52a‧‧‧周壁部 52a‧‧‧Walls

52b‧‧‧第2底部 52b‧‧‧2nd bottom

53‧‧‧孔部 53‧‧‧ Hole Department

6‧‧‧製造裝置 6‧‧‧Manufacture of equipment

61‧‧‧退繞裝置 61‧‧‧Unwinding device

62‧‧‧預熱裝置 62‧‧‧Preheating device

63‧‧‧賦形裝置 63‧‧‧Shaping device

圖1係本發明的一實施形態之吸收性物品用不織布的立體圖。 Fig. 1 is a perspective view of a nonwoven fabric for an absorbent article according to an embodiment of the present invention.

圖2係本發明的一實施形態之吸收性物品用不織布的俯視圖。 Fig. 2 is a plan view showing a nonwoven fabric for an absorbent article according to an embodiment of the present invention.

圖3係本發明的一實施形態之吸收性物品用不織布之沿著圖2所示的III-III'線之剖面的放大剖面圖。 Fig. 3 is an enlarged cross-sectional view showing a cross section taken along line III-III' of Fig. 2 of the non-woven fabric for absorbent articles according to the embodiment of the present invention.

圖4(a)係本發明的一實施形態之吸收性物品用不織布的沿著圖2所示的IV-IV'線之剖面的放大剖面圖，圖4(b)係圖4(a)所示的吸收性物品用不織布之剖面的主要部分放大示意圖。 Fig. 4 (a) is an enlarged cross-sectional view showing a cross section taken along the line IV-IV' shown in Fig. 2 of the nonwoven fabric for an absorbent article according to the embodiment of the present invention, and Fig. 4 (b) is a view of Fig. 4 (a) The main part of the cross section of the non-woven fabric of the absorbent article shown is an enlarged view.

圖5係用於說明本發明的吸收性物品用不織布之製造裝置的一例之示意圖。 Fig. 5 is a schematic view for explaining an example of a manufacturing apparatus for a nonwoven fabric for an absorbent article of the present invention.

圖6係示意顯示本發明的吸收性物品用不織布之製造裝置所具備的賦形裝置之一對的賦形輥子之主要部分放大立體圖。 Fig. 6 is a perspective view showing an essential part of a shaping roller of a pair of shaping devices provided in the apparatus for manufacturing a nonwoven fabric for an absorbent article of the present invention.

圖7係顯示圖6所示的一對的賦形輥子中之下方側賦形輥子的銷之配置的主要部分放大示意圖。 Figure 7 is a view showing the lower side of the pair of forming rollers shown in Figure 6 An enlarged schematic view of the main part of the arrangement of the pins of the roller.

圖8係顯示圖6所示的一對的賦形輥子中之上方側賦形輥子和下方側賦形輥子的嚙合狀態之主要部分放大示意圖。 Fig. 8 is an enlarged schematic view showing the main part of the meshing state of the upper side forming roller and the lower side forming roller of the pair of forming rolls shown in Fig. 6.

以下，針對本發明的吸收性物品用不織布之較佳實施形態，參照圖式詳細地說明。 Hereinafter, preferred embodiments of the nonwoven fabric for absorbent articles of the present invention will be described in detail with reference to the drawings.

圖1~4係本發明的一實施形態之吸收性物品用不織布1的示意圖。又在本說明書中，在沒有特別說明的情況，將展開狀態的不織布從上表面側朝厚度方向D_T觀察簡稱為「俯視」。 Figs. 1 to 4 are schematic views showing a nonwoven fabric 1 for an absorbent article according to an embodiment of the present invention. Further, in the present specification, the non-woven fabric in the unfolded state is simply referred to as "plan view" from the upper surface side toward the thickness direction D _T unless otherwise specified.

如圖1~4所示般，本發明的第一實施形態之吸收性物品用不織布1，係具有作為第1面之上表面1a、及與該上表面1a為相反側之作為第2面的下表面1b；且是包含第1纖維層2及第2纖維層3而由2層的纖維積層體所構成，第1纖維層2係形成前述下表面1b的纖維層且含有棉2a及熱塑性樹脂纖維2b；第2纖維層3係與前述第1纖維層2之上表面1a側的面鄰接且是形成前述上表面1a之纖維層，其含有熱塑性樹脂纖維3a且不含棉。再者，前述不織布1具有後述特定的凹凸構造，亦即係具有複數個凸部4及複數個溝槽部5，複數個凸部4係在前述上表面1a上朝第1方向D₁延伸設置且在與前述第1方向D₁正交的第2方向D₂隔著預定的間隔設置，並朝向前述上表面1a的方向突出；複數個溝槽部5係朝前述第1方向D₁延伸設置且設置於在前述第2方向D₂上相鄰的前述凸部4之間，並朝向前述下表面1b的方向凹陷；前述溝槽部5係具有第1凹部51及複數個第2凹部52，第1凹部51具備第1底部51a，第1底部51a係位於比前述凸部4的頂部41之前述第1面1a側的位置更靠前述第2面1b側；複數個第2凹部52係在前述第1凹部51內沿前述第1方向D₁不連續地設置，且從前述第1底部51a朝向前述第2面1b的方向凹陷；再者，前述第2凹部52係具備周壁部52a及第2底部52b，周壁部52a係從前述第1底部51a朝向前述第2面1b側的方向延伸設置，第2底部52b係在前述周壁部52a之前述第2面1b側的端部設置成將該端部封閉，且在前述不織布1中具有最高的纖維密度。 As shown in Figs. 1 to 4, the non-woven fabric 1 for an absorbent article according to the first embodiment of the present invention has a first surface upper surface 1a and a second surface opposite to the upper surface 1a. The lower surface 1b is composed of a fiber layered body including the first fiber layer 2 and the second fiber layer 3, and the first fiber layer 2 is a fiber layer of the lower surface 1b and contains cotton 2a and a thermoplastic resin. The second fiber layer 3 is a fiber layer that forms the upper surface 1a adjacent to the surface of the first fiber layer 2 on the upper surface 1a side, and contains the thermoplastic resin fiber 3a and does not contain cotton. Furthermore, after the nonwoven has a specific uneven structure described later, i.e., a system having a plurality of convex portions and a plurality of groove portions 4 5, a plurality of convex portions 1a towards the surface 4 based on the first direction D ₁ extends The second direction D ₂ orthogonal to the first direction D ₁ is provided at a predetermined interval and protrudes in a direction toward the upper surface 1a. The plurality of groove portions 5 are extended toward the first direction D _{1 .} And being disposed between the convex portions 4 adjacent to each other in the second direction D ₂ and recessed toward the lower surface 1b; the groove portion 5 has a first concave portion 51 and a plurality of second concave portions 52, The first recessed portion 51 includes a first bottom portion 51a, and the first bottom portion 51a is located closer to the second surface 1b than the first surface 1a of the top portion 41 of the convex portion 4; the plurality of second recesses 52 are attached the first inner concave portion 51 along the first direction D ₁ discontinuously arranged, the direction of the second surface 1b of the recess and directed from the first bottom portion 51a; Furthermore, the 52 lines of the second recessed portion includes a peripheral wall portion 52a and the second 2 bottom portion 52b, the peripheral wall portion 52a extends from the first bottom portion 51a toward the second surface 1b side, and the second bottom portion The end portion of the peripheral wall portion 52a on the second surface 1b side is provided to close the end portion, and the nonwoven fabric 1 has the highest fiber density.

本發明的吸收性物品用不織布所適用的吸收性物品，並沒有特別的限定，例如可列舉：黏貼型或褲型的用後即棄式紙尿布、衛生棉、護墊等各種的吸收性物品。本發明的吸收性物品用不織布，例如雖也能作為用後即棄式紙尿布等的背面薄片之外側的面上所貼合之薄片材來使用，但較佳為作為：用後即棄式紙尿布、衛生棉等的吸收性物品之表面薄片、防漏壁等之可能與穿戴者的皮膚接觸之薄片材。 The absorbent article to which the non-woven fabric for absorbent articles of the present invention is applied is not particularly limited, and examples thereof include various types of absorbent articles such as a disposable type diaper, a sanitary napkin, and a pad. . The non-woven fabric for absorbent articles of the present invention can be used, for example, as a sheet to be bonded to the outer surface of the back sheet such as a disposable diaper, but it is preferably used as a disposable A sheet such as a surface sheet of an absorbent article such as a disposable diaper or a sanitary napkin, or a leakage preventing wall which may come into contact with the wearer's skin.

本發明的吸收性物品用不織布，當運用於吸收性物品之表面薄片等的情況，基於觸感、柔軟性的觀點，較佳為配置成使具備凸部之第1面面對穿戴者的皮膚。 The non-woven fabric for absorbent articles of the present invention is applied to the surface sheet of an absorbent article, etc., based on the feeling of touch and softness. Preferably, the first surface having the convex portion is disposed to face the wearer's skin.

構成本發明的一實施形態之吸收性物品用不織布1的纖維積層體，是包含第1纖維層2及第2纖維層3而由2層的纖維積層體所構成，第1纖維層2含有棉2a及熱塑性樹脂纖維2b，第2纖維層3係與前述第1纖維層2之上表面1a側的面鄰接且是形成前述上表面1a之纖維層，其含有熱塑性樹脂纖維3a且不含棉。但本發明的前述纖維積層體並不限定於上述2層的纖維積層體，亦可為包含前述第1纖維層及第2纖維層之由3層以上的纖維層所構成之纖維積層體。 The fibrous laminate of the non-woven fabric 1 for absorbent articles according to the embodiment of the present invention comprises a first fibrous layer 2 and a second fibrous layer 3 and is composed of two fibrous laminates, and the first fibrous layer 2 contains cotton. 2a and the thermoplastic resin fiber 2b, the second fiber layer 3 is a fiber layer which forms the upper surface 1a adjacent to the surface of the upper surface 1a side of the said first fiber layer 2, and contains the thermoplastic resin fiber 3a, and does not contain cotton. However, the fibrous laminate of the present invention is not limited to the two-layered fibrous laminate, and may be a fibrous laminate comprising three or more fibrous layers including the first fibrous layer and the second fibrous layer.

在本發明中，前述第1纖維層所含的棉沒有特別的限制，例如可使用：纖度1.0~15dtex的範圍內、纖維長度5~40mm的範圍內之棉等。其中，纖維長度20mm以上的棉，當將第1纖維層與後述的第2纖維層積層時(亦即，形成纖維積層體時)，棉纖維的一部分容易進入前述第2纖維層內，能使不織布的液體透過性提高，因此是較佳的。此外，由纖維長度20mm以上的棉和纖維長度10mm以下的棉所混合成之混合棉，利用纖維長度20mm以上的棉可提高不織布的液體透過性，又利用纖維長度10mm以下的棉可增大不織布的體積，因此是特佳的。 In the present invention, the cotton contained in the first fiber layer is not particularly limited, and for example, cotton having a fineness of 1.0 to 15 dtex and a fiber length of 5 to 40 mm can be used. In the case where the first fiber layer and the second fiber layer to be described later are laminated (that is, when the fiber layered body is formed), a part of the cotton fiber can easily enter the second fiber layer. The liquid permeability of the nonwoven fabric is improved, and therefore it is preferable. In addition, a cotton blended with cotton having a fiber length of 20 mm or more and a cotton having a fiber length of 10 mm or less can increase the liquid permeability of the nonwoven fabric by using a cotton having a fiber length of 20 mm or more, and can increase the non-woven fabric by using a cotton having a fiber length of 10 mm or less. The volume is therefore particularly good.

在第1纖維層的棉含量，沒有特別的限制，基於吸水性、保水性、柔軟性等的觀點，例如在1~70質量%的範圍內，較佳為2~30質量%的範圍內。 The cotton content of the first fiber layer is not particularly limited, and is, for example, in the range of 1 to 70% by mass, preferably 2 to 30% by mass, from the viewpoints of water absorbability, water retention, flexibility, and the like.

在本發明中，前述第1纖維層所含的熱塑性樹脂纖維，只要是熱塑性樹脂所構成的纖維即可，沒有特別的限制，作為該熱塑性樹脂，例如可列舉：聚乙烯(PE)、聚丙烯(PP)、乙烯-醋酸乙烯共聚物(EVA)等的烯烴系樹脂，聚對苯二甲酸乙二酯(PET)、聚乳酸(PLA)等的聚酯系樹脂，6-尼龍等的聚醯胺系樹脂等之公知樹脂，該等樹脂可單獨使用，也能將二種以上的樹脂並用。 In the present invention, the thermoplastic resin fiber contained in the first fiber layer is not particularly limited as long as it is a fiber composed of a thermoplastic resin, and examples of the thermoplastic resin include polyethylene (PE) and polypropylene. (PP), an olefin resin such as ethylene-vinyl acetate copolymer (EVA), a polyester resin such as polyethylene terephthalate (PET) or polylactic acid (PLA), or a polyfluorene such as 6-nylon. A known resin such as an amine resin, these resins may be used singly or in combination of two or more kinds of resins.

此外，這種熱塑性樹脂所構成的纖維之構造，沒有特別的限制，例如可列舉：芯鞘型纖維、並列型纖維、島/海型纖維等的複合纖維，中空型的纖維，扁平、Y字形、C字形等的異形剖面型纖維，潛在捲縮或顯現捲縮之立體捲縮纖維，利用水流、熱、壓花加工等的物理性負荷而進行分割的分割纖維等，具有這些構造的纖維可單獨使用，也能將二種以上的纖維並用。 Further, the structure of the fiber composed of the thermoplastic resin is not particularly limited, and examples thereof include a core-sheath type fiber, a side-by-side type fiber, a composite fiber such as an island/sea type fiber, and a hollow type fiber, which is flat and Y-shaped. a profiled cross-section fiber such as a C-shape, a three-dimensional crimped fiber that is sometimes crimped or curled, and a split fiber that is divided by a physical load such as water flow, heat, or embossing, and the like. When used alone, two or more types of fibers can be used in combination.

前述熱塑性樹脂纖維的纖度(纖維直徑)，只要比後述的第2纖維層所含的熱塑性樹脂纖維之纖維直徑更細即可，沒有特別的限制，基於不織布的強度和柔軟性、觸感、液體透過性等的觀點，通常在1.1~8.8dtex的範圍內，較佳為1.5~4.6dtex的範圍內。 The fineness (fiber diameter) of the thermoplastic resin fiber is not particularly limited as long as it is smaller than the fiber diameter of the thermoplastic resin fiber contained in the second fiber layer to be described later, and is based on the strength and flexibility of the nonwoven fabric, the touch, and the liquid. The viewpoint of permeability and the like is usually in the range of 1.1 to 8.8 dtex, preferably in the range of 1.5 to 4.6 dtex.

此外，前述熱塑性樹脂纖維的纖維長度，沒有特別的限制，基於不織布的強度和柔軟性、液體透過性等的觀點，通常在20~100mm的範圍內，較佳為35~65mm的範圍內。前述熱塑性樹脂纖維可實施親水化處理，作為這種親水化處理，例如可列舉：利用界面活性劑、親水劑等的處理(例如，在纖維內部摻混界面活性劑、在纖維表面塗布界面活性劑等)等。 In addition, the fiber length of the thermoplastic resin fiber is not particularly limited, and is usually in the range of 20 to 100 mm, preferably 35 to 65 mm, from the viewpoints of strength, flexibility, liquid permeability, and the like of the nonwoven fabric. The aforementioned thermoplastic resin fiber can be subjected to hydrophilization treatment as Examples of the hydrophilization treatment include treatment with a surfactant, a hydrophilic agent, and the like (for example, a surfactant is blended inside the fiber, and a surfactant is applied to the surface of the fiber).

在第1纖維層之熱塑性樹脂纖維的含量，沒有特別的限制，基於不織布的強度和柔軟性等的觀點，例如在30~99質量%的範圍內，較佳為70~98質量%的範圍內。 The content of the thermoplastic resin fiber in the first fiber layer is not particularly limited, and is, for example, in the range of 30 to 99% by mass, preferably 70 to 98% by mass, based on the strength and flexibility of the nonwoven fabric. .

此外，前述第1纖維層，在不阻害本發明的效果之範圍內，可含有前述棉及熱塑性纖維以外的纖維、任意的添加劑等。 In addition, the first fiber layer may contain fibers other than the cotton and thermoplastic fibers, any additives, and the like, within a range that does not impair the effects of the present invention.

接著來說明，構成本發明的吸收性物品用不織布之前述第2纖維層。前述第2纖維層所含的熱塑性樹脂纖維，除了具有比前述第1纖維層所含的熱塑性樹脂纖維更粗的纖維直徑以外，沒有特別的限制，可使用任意的熱塑性樹脂纖維，但基於纖維彼此的纏絡容易性等的觀點，較佳為採用：除纖維直徑(纖度)以外是與前述第1纖維層所含的熱塑性樹脂纖維同樣的纖維(亦即，與前述第1纖維層所含的熱塑性樹脂纖維同樣的材質(樹脂)所構成，具有同樣的纖維長度之纖維)。 Next, the second fiber layer constituting the nonwoven fabric for an absorbent article of the present invention will be described. The thermoplastic resin fiber contained in the second fiber layer is not particularly limited as long as it has a fiber diameter larger than that of the thermoplastic resin fiber contained in the first fiber layer, and any thermoplastic resin fiber may be used. From the viewpoint of easiness of entanglement and the like, it is preferable to use a fiber similar to the thermoplastic resin fiber contained in the first fiber layer except for the fiber diameter (denier) (that is, the fiber contained in the first fiber layer) The thermoplastic resin fiber is composed of the same material (resin) and has the same fiber length).

前述第2纖維層，在不阻害本發明的效果之範圍內，可含有前述熱塑性纖維以外的纖維、任意的添加劑等。 The second fiber layer may contain fibers other than the thermoplastic fibers, any additives, and the like, within a range that does not impair the effects of the present invention.

在本發明中，前述第1纖維層所含的熱塑性樹脂纖維，係具有比前述第2纖維層所含的熱塑性樹脂纖維更細的纖維直徑，因此前述第1纖維層所含的纖維直徑較細的熱塑性樹脂纖維容易與前述第1纖維層所含的棉、前述第2纖維層所含的熱塑性樹脂纖維進行纏絡，而不容易發生上述般之纖維層的***、各纖維層間之層間剝離，縱使不織布是含有棉作為構成成分，仍能保持作為不織布之優異的強度。 In the present invention, the thermoplastic resin fiber contained in the first fiber layer has a fiber diameter smaller than that of the thermoplastic resin fiber contained in the second fiber layer, and therefore the fiber diameter of the first fiber layer is included. The fine thermoplastic resin fiber is easily entangled with the cotton contained in the first fiber layer and the thermoplastic resin fiber contained in the second fiber layer, and the fiber layer is not easily broken, and the layers between the fiber layers are interposed. Peeling, even if the non-woven fabric contains cotton as a constituent component, it can maintain excellent strength as a non-woven fabric.

在本發明中，構成吸收性物品用不織布之纖維積層體，並不限定於上述實施形態之2層的積層體，可按照期望的吸收性、柔軟性等而使用3層以上的纖維層所構成的積層體。此外，本發明的吸收性物品用不織布，不論纖維積層體的層數為何，前述不織布之第1面較佳為由含有棉之第1纖維層以外的纖維層所形成。吸收性物品之作為穿戴者的皮膚抵接面之第1面，若由含有棉之第1纖維層以外的纖維層所形成，可防止棉所造成的觸感惡化、柔軟性降低等，而能保持作為不織布之優異的觸感及柔軟性。 In the present invention, the fiber laminated body constituting the non-woven fabric for an absorbent article is not limited to the two-layered laminated body of the above-described embodiment, and may be composed of three or more fibrous layers in accordance with desired absorbability, flexibility, and the like. The layered body. Further, in the nonwoven fabric for an absorbent article of the present invention, the first surface of the nonwoven fabric is preferably formed of a fiber layer other than the first fibrous layer containing cotton, regardless of the number of layers of the fibrous laminate. When the first surface of the skin contact surface of the wearer of the absorbent article is formed of a fiber layer other than the first fiber layer containing cotton, it is possible to prevent deterioration of the tactile sensation caused by cotton and to reduce the flexibility. Maintains excellent touch and softness as a non-woven fabric.

此外，在本發明的吸收性物品用不織布中，前述第1纖維層及第2纖維層以外的其他纖維層，沒有特別的限制，例如可列舉：羊毛等的天然纖維、嫘縈等的再生纖維、無機纖維或熱塑性樹脂纖維等的合成樹脂纖維等所構成之纖維層。又其他的纖維層，在不阻害本發明的效果之範圍內，可含有任意的添加劑等。 In the non-woven fabric for absorbent articles of the present invention, the fiber layers other than the first fiber layer and the second fiber layer are not particularly limited, and examples thereof include natural fibers such as wool and regenerated fibers such as enamel. A fiber layer composed of a synthetic resin fiber such as an inorganic fiber or a thermoplastic resin fiber. Further, the other fiber layer may contain any additives or the like within a range that does not impair the effects of the present invention.

在本發明中，構成吸收性物品用不織布之各纖維層的基重，沒有特別的限制，基於不織布的強度和柔軟性、吸收性等的觀點，分別例如在1~60g/m²的範圍內，較佳為10~30g/m²的範圍內。吸收性物品用不織布的基重，沒有特別的限制，通常在10~100g/m²的範圍內，較佳為15~75g/m²的範圍內，更佳為20~50g/m²的範圍內。 In the present invention, the basis weight of each of the fiber layers constituting the non-woven fabric for absorbent articles is not particularly limited, and is, for example, in the range of 1 to 60 g/m ² from the viewpoints of strength, flexibility, absorbability, and the like of the nonwoven fabric. Preferably, it is in the range of 10 to 30 g/m ² . The basis weight of the non-woven fabric for absorbent articles is not particularly limited, and is usually in the range of 10 to 100 g/m ² , preferably 15 to 75 g/m ² , more preferably 20 to 50 g/m ² . Inside.

此外，本發明的吸收性物品用不織布之厚度，沒有特別的限制，通常在0.1~5mm的範圍內，較佳為0.5~3mm的範圍內，更佳為0.8~2mm的範圍內。 Further, the thickness of the nonwoven fabric for an absorbent article of the present invention is not particularly limited, and is usually in the range of 0.1 to 5 mm, preferably 0.5 to 3 mm, more preferably 0.8 to 2 mm.

在本發明的其他實施形態之吸收性物品用不織布中，前述不織布係包含：形成該不織布的第2面之前述第1纖維層、與該第1纖維層的第1面側之面鄰接之前述第2纖維層、以及與該第2纖維層的第1面側之面鄰接之第3纖維層，第3纖維層含有熱塑性樹脂纖維且不含棉；各纖維層之熱塑性樹脂纖維的基重相同，前述第3纖維層所含的熱塑性樹脂纖維的纖維直徑(纖度)，係與前述第2纖維層所含的熱塑性樹脂纖維相同或更大。 In the non-woven fabric for absorbent articles according to another embodiment of the present invention, the nonwoven fabric includes the first fiber layer forming the second surface of the nonwoven fabric and the surface adjacent to the first surface side of the first fiber layer. The second fiber layer and the third fiber layer adjacent to the surface of the second fiber layer on the first surface side, the third fiber layer contains thermoplastic resin fibers and does not contain cotton; the thermoplastic resin fibers of the respective fiber layers have the same basis weight The fiber diameter (fineness) of the thermoplastic resin fiber contained in the third fiber layer is the same as or greater than the thermoplastic resin fiber contained in the second fiber layer.

該實施形態之吸收性物品用不織布，前述第1纖維層所含的熱塑性樹脂纖維的纖維量(纖維根數)比前述第2纖維層及前述第3纖維層更多，因此可更加提高含有棉之第1纖維層的強度。此外，這種不織布的構造，在厚度方向上，從前述不織布之第1面到第2面(亦即，從第3纖維層到第1纖維層)存在有纖維量(纖維根數)變多之纖維量梯度(或是，從前述第1面到第2面(從第3纖維層到第1纖維層)存在有纖維密度增大之纖維密度梯度)，供應給前述不織布的第1面側之面的尿、經血等的體液，容易從前述不織布的第1面側往第2面側導入，而能發揮作為吸收性物品用不織布之更優異的吸收性(特別是吸收速度、液體轉移性等)。 In the non-woven fabric for absorbent articles of the embodiment, the amount of fibers (the number of fibers) of the thermoplastic resin fibers contained in the first fiber layer is larger than that of the second fiber layer and the third fiber layer, so that the cotton content can be further improved. The strength of the first fibrous layer. Further, in the nonwoven fabric structure, the amount of fibers (the number of fibers) increases from the first surface to the second surface of the nonwoven fabric (that is, from the third fiber layer to the first fiber layer) in the thickness direction. The fiber amount gradient (or a fiber density gradient in which the fiber density increases from the first surface to the second surface (from the third fiber layer to the first fiber layer)) is supplied to the first surface side of the nonwoven fabric Body fluids such as urine and menstrual blood, It is easy to introduce from the first surface side of the nonwoven fabric to the second surface side, and it is possible to exhibit more excellent absorbability (especially absorption speed, liquid transfer property, and the like) as a non-woven fabric for absorbent articles.

接下來說明，構成本發明的吸收性物品用不織布之凹凸賦形加工前(形成凹凸構造前)之纖維積層體的製造方法。 Next, a method of producing a fibrous layered body before forming the uneven portion of the non-woven fabric for an absorbent article of the present invention (before forming the uneven structure) will be described.

在本發明中，製造前述纖維積層體的手段沒有特別的限定，例如可列舉：使用用於形成上述各纖維層的纖維(亦即，用於形成第1纖維層的棉及熱塑性樹脂纖維、用於形成第2纖維層的熱塑性樹脂纖維等)，分別形成對應於各纖維層之纖維網(fleece)，讓各纖維網內及纖維網間之纖維彼此物理或化學性結合的方法等。 In the present invention, the means for producing the fiber laminate is not particularly limited, and examples thereof include fibers for forming the respective fiber layers (that is, cotton and thermoplastic resin fibers for forming the first fiber layer). In the thermoplastic resin fiber or the like forming the second fiber layer, a fiber web corresponding to each fiber layer is formed, and a fiber or a fiber between the fiber mesh and the fiber mesh is physically or chemically bonded to each other.

具體而言，可按照以下的順序，製造出含有前述第1纖維層及第2纖維層之2層的纖維積層體。 Specifically, a fiber laminate including two layers of the first fiber layer and the second fiber layer can be produced in the following order.

(1)準備一製造裝置，該製造裝置係具備：將薄片狀構件朝單方向搬運之搬運裝置、在該搬運裝置的上方且配置於搬運方向的上游側之第1段切割裝置、在前述搬運裝置的上方且配置於搬運方向的下游側(亦即，比第1段切割裝置更下游側)之第2段切割裝置、以及配置在該第2段切割裝置的下游側之熱風方式的加熱裝置。 (1) A manufacturing apparatus including a conveying device that conveys a sheet-like member in a single direction, and a first-stage cutting device that is disposed on the upstream side in the conveying direction above the conveying device, and the conveying device a second-stage cutting device disposed on the downstream side of the apparatus in the transport direction (that is, on the downstream side of the first-stage cutting device), and a hot-air type heating device disposed on the downstream side of the second-stage cutting device .

(2)對前述第1段切割裝置供應用於形成第2纖維層之熱塑性樹脂纖維，藉由前述切割裝置內的旋轉輥子之銷將前述熱塑性樹脂纖維開纖，藉此將對應於前述第2纖維層之纖維網形成在前述搬運裝置的搬運面上。 (2) supplying the thermoplastic resin fiber for forming the second fiber layer to the first-stage cutting device, and opening the thermoplastic resin fiber by the pin of the rotating roller in the cutting device, thereby corresponding to the second The fiber web of the fiber layer is formed on the conveying surface of the conveying device.

(3)將前述搬運裝置的搬運面上所形成之對應於前述第2纖維層的纖維網，一邊朝搬運方向的下游側搬運，一邊將用於形成第1纖維層之棉和熱塑性樹脂纖維供應給前述第2段切割裝置，藉由前述切割裝置內之旋轉輥子的銷將各纖維實施開纖，使對應於前述第1纖維層之纖維網形成在搬運中之對應於前述第2纖維層之纖維網上。 (3) The fiber web corresponding to the second fiber layer formed on the conveyance surface of the conveyance device is conveyed toward the downstream side in the conveyance direction, and the cotton and thermoplastic resin fibers for forming the first fiber layer are supplied. In the second-stage cutting device, each of the fibers is opened by a pin of a rotating roller in the cutting device, and a web corresponding to the first fiber layer is formed in the conveyance corresponding to the second fiber layer. Fiber online.

(4)將在對應於前述第2纖維層之纖維網上積層對應於前述第1纖維層之纖維網而成的積層纖維網，搬運至前述熱風方式的加熱裝置，在該加熱裝置內，讓各纖維網內及纖維網間的纖維彼此纏絡，任意地讓前述熱塑性樹脂纖維彼此熱熔接並將棉熔接固定於熱塑性樹脂纖維的表面，藉此製造出由前述第1纖維層和前述第2纖維層所積層而成之2層的纖維積層體。 (4) transporting the laminated fiber web corresponding to the fiber web of the first fiber layer on the fiber web corresponding to the second fiber layer to the hot air type heating device, and allowing the heating device to The fibers in the fiber web and the fiber web are entangled with each other, and the thermoplastic resin fibers are arbitrarily thermally fused to each other and the cotton is welded and fixed to the surface of the thermoplastic resin fiber, whereby the first fiber layer and the second layer are produced. A two-layer fiber laminate in which a fiber layer is laminated.

又當製造由3層以上的纖維層所構成之纖維積層體的情況，可使用將切割裝置配置成3段以上之製造裝置，與上述順序同樣地進行製造。 In the case of producing a fiber laminate comprising three or more fiber layers, a manufacturing apparatus in which the dicing apparatus is arranged in three or more stages can be used, and the same procedure as described above can be used.

對應於各纖維層之纖維網的形成方法，並不限定於上述方法，例如也能採用濕式法等。此外，纖維網的結合方法並不限定於上述方法，例如也能採用水流纏絡法、針刺法等。 The method of forming the fiber web corresponding to each fiber layer is not limited to the above method, and for example, a wet method or the like can also be employed. Further, the method of bonding the fiber web is not limited to the above method, and for example, a water flow entanglement method, a needle punching method, or the like can also be employed.

如此般製造出的纖維積層體，藉由後述的凹凸賦形加工賦予上述特定的凹凸構造，而獲得本發明的吸收性物品用不織布。 The fibrous laminate produced in this manner is provided with the above-described specific uneven structure by the uneven forming process described later, and the nonwoven fabric for an absorbent article of the present invention is obtained.

接下來，針對本發明的吸收性物品用不織布之凹凸構造，參照圖式做更詳細的說明。 Next, a non-woven fabric for an absorbent article of the present invention The uneven structure will be described in more detail with reference to the drawings.

如圖1~4所示般，本發明的一實施形態之吸收性物品用不織布1，成為凸部4之第1面1a的區域及第2面1b的區域，係構成為從第2面1b側朝向第1面1a側的方向呈凸狀彎曲。另一方面，關於溝槽部5的第1凹部51，成為該第1凹部51之第1面1a的區域及第2面1b的區域，係構成為從第1面1a側朝向第2面1b側的方向呈凸狀彎曲。因此，對於與前述凸部4所延伸設置的第1方向D₁正交之第2方向D₂，前述不織布1成為凹凸交互反覆之剖面大致波形的薄片狀。 As shown in FIGS. 1 to 4, the non-woven fabric 1 for absorbent articles according to the embodiment of the present invention is a region of the first surface 1a of the convex portion 4 and a region of the second surface 1b, and is configured from the second surface 1b. The direction in which the side faces the first surface 1a side is convexly curved. On the other hand, the first concave portion 51 of the groove portion 5 is a region of the first surface 1a of the first concave portion 51 and a region of the second surface 1b, and is configured from the first surface 1a side toward the second surface 1b. The direction of the sides is convexly curved. Therefore, in the second direction D ₂ orthogonal to the first direction D _{1 in} which the convex portion 4 is extended, the non-woven fabric 1 has a sheet shape in which the cross-section of the unevenness is substantially reversed.

前述凸部4，係朝向前述不織布1的面(薄片面)之第1方向D₁(例如，不織布的長度方向)延伸設置，且在與前述不織布1的面之前述第1方向D₁正交的第2方向D₂(例如，不織布的寬度方向)隔著預定的間隔配設有複數列。在本實施形態中，各凸部4都是朝向第1方向D₁連續地且與其他凸部4相互平行地延伸設置。 The convex portion 4 extends in a first direction D ₁ (for example, a longitudinal direction of the nonwoven fabric) facing the surface (sheet surface) of the nonwoven fabric 1 and is orthogonal to the first direction D ₁ of the surface of the nonwoven fabric 1 The second direction D ₂ (for example, the width direction of the nonwoven fabric) is provided with a plurality of columns at predetermined intervals. In the present embodiment, each convex portion 4 is facing the first direction D ₁ and extends continuously convex portion 4 is provided with other parallel to each other.

在本發明的吸收性物品用不織布中，凸部與相鄰的其他凸部之間的間隔較佳為0.25~5mm，更佳為0.5~3mm，特佳為0.75~2mm。在此，「相鄰凸部之間的間隔」是指，各凸部的第2方向D₂之大致中央位置(實質上是凸部的頂部)之間的距離。 In the nonwoven fabric for absorbent articles of the present invention, the interval between the convex portion and the adjacent other convex portions is preferably 0.25 to 5 mm, more preferably 0.5 to 3 mm, and particularly preferably 0.75 to 2 mm. Here, the "interval between adjacent convex portions" means the distance between the substantially central position (substantially the top of the convex portion) of the second direction D ₂ of each convex portion.

當相鄰凸部之間的間隔的距離未達0.25mm時，不織布的凹凸構造過於微細，不織布的凸部和穿戴者的皮膚之接觸面積無法充分減少，因此不織布的表面(第1面)之觸感可能降低，另一方面，當相鄰凸部之間的間隔的距離超過5mm時，與凹凸賦形加工前的不織布(亦即，纖維積層體)在構造上的差異變少，難以獲得利用凹凸構造之柔軟觸感。 When the distance between the adjacent convex portions is less than 0.25 mm, the uneven structure of the non-woven fabric is too fine, and the contact area between the non-woven convex portion and the wearer's skin cannot be sufficiently reduced, so the surface of the non-woven fabric (the first surface) The tactile sensation may be lowered. On the other hand, when the distance between the adjacent convex portions is more than 5 mm, the difference in the structure from the non-woven fabric (that is, the fibrous laminate) before the uneven forming process is small, and it is difficult to obtain The soft touch of the uneven structure is utilized.

此外，在本發明的吸收性物品用不織布中，關於凸部，從第1凹部之第1底部之第1面側的高度到凸部之頂部的高度之長度(亦即，凸部的高度)較佳為0.25~5mm，更佳為0.5~3mm，特佳為0.75~2mm。當該凸部的高度未達0.25mm時，凸部的突出過小，難以獲得利用凹凸構造之柔軟觸感，另一方面，當凸部的高度超過5mm時，凸部的突出過大而成為銳利的構造，難以獲得柔軟觸感。 Further, in the non-woven fabric for absorbent articles of the present invention, the length of the convex portion from the height of the first surface of the first bottom portion of the first concave portion to the height of the top portion of the convex portion (that is, the height of the convex portion) It is preferably 0.25 to 5 mm, more preferably 0.5 to 3 mm, and particularly preferably 0.75 to 2 mm. When the height of the convex portion is less than 0.25 mm, the protrusion of the convex portion is too small, and it is difficult to obtain a soft touch feeling by the uneven structure. On the other hand, when the height of the convex portion exceeds 5 mm, the protrusion of the convex portion becomes too large and becomes sharp. The structure makes it difficult to obtain a soft touch.

如圖1~4所示般，本發明的一實施形態之吸收性物品用不織布1，在第2方向D₂上之相鄰凸部4、4之間的空間，將溝槽部5設置成朝第1方向D₁延伸，前述溝槽部5係具有第1凹部51及複數個第2凹部52，第1凹部51具備第1底部51a，第1底部51a係位於比凸部4的頂部41之第1面1a側的位置更靠第2面1b的方向；複數個第2凹部52係在第1凹部51內沿前述第1方向D₁不連續地設置，且從前述第1底部51a朝向前述第2面1b的方向凹陷。 As shown in FIGS. 1 to 4, in the nonwoven fabric 1 for an absorbent article according to the embodiment of the present invention, the groove portion 5 is provided in a space between adjacent convex portions 4 and 4 in the second direction D ₂ . toward the first direction D ₁ extends, the groove portion 5 system having a first concave portion 51 and a plurality of second recessed portions 52, a first recess 51 includes a bottom of a first 51a, a bottom of the first 51a based positioned than the top of the convex portion 41 of the position of the first surface 1a side closer to the direction of the second surface 1b; a plurality of second recess portion 52 based on the first recess portion 51 along the first direction D ₁ discontinuously arranged, and from the bottom of the first aforementioned 51a toward The direction of the second surface 1b is recessed.

本發明的吸收性物品用不織布，藉由具有如此般特定的凸部及溝槽部之構造，亦即，前述溝槽部具有第1凹部及第2凹部，該第1凹部具備有第1底部，該第 1底部位於比前述凸部之頂部之第1面側的位置更靠第2面側；該第2凹部具備有周壁部及第2底部，該周壁部係從前述第1底部朝向前述第2面側的方向延伸設置；該第2底部係在前述周壁部之前述第2面側的端部設置成封閉該端部，因此從前述不織布的第1面側施加之厚度方向的應力可藉由前述第1凹部朝向前述第2面側的彎曲而予以緩衝，縱使是含有棉作為構成成分之不織布，仍可確保充分的柔軟性。 The non-woven fabric for absorbent articles of the present invention has a structure having such a specific convex portion and a groove portion, that is, the groove portion has a first concave portion and a second concave portion, and the first concave portion has a first bottom portion , the first a bottom portion is located on a second surface side of a position on a first surface side of a top portion of the convex portion, and the second concave portion includes a peripheral wall portion and a second bottom portion, the peripheral wall portion is oriented from the first bottom portion toward the second surface The second bottom portion is provided at the end portion on the second surface side of the peripheral wall portion so as to close the end portion. Therefore, the stress in the thickness direction applied from the first surface side of the nonwoven fabric can be obtained by the aforementioned The first concave portion is cushioned toward the curvature on the second surface side, and even if it is a nonwoven fabric containing cotton as a constituent component, sufficient flexibility can be ensured.

在本發明的一實施形態中，前述第2凹部52係具有俯視大致矩形的開口，整體是朝前述不織布1的下表面1b側突出，而具有大致長方體狀的內部空間。此外，第2凹部52，係在各溝槽部5的長度方向(亦即，第1方向D₁，或第1凹部51的長度方向)上隔著一定的間隔配設，各第2凹部52與其他的第2凹部52形成為相互獨立的狀態。 In one embodiment of the present invention, the second recessed portion 52 has an opening having a substantially rectangular shape in plan view, and has an entire inner space that protrudes toward the lower surface 1b side of the nonwoven fabric 1 and has a substantially rectangular parallelepiped shape. Further, the second recessed portion 52 is disposed at a constant interval in the longitudinal direction of each of the groove portions 5 (that is, the first direction D ₁ or the longitudinal direction of the first recessed portion 51), and each of the second recessed portions 52 is provided. The other second recesses 52 are formed in a state of being independent of each other.

此外，在本實施形態中，前述複數個第2凹部52分別具備：以與第1底部51a連續的狀態朝向下表面1b側延伸之立壁狀的周壁部52a、設置於該周壁部52a的下端側之上述第2底部52b。前述周壁部52a係具備：沿前述第1方向D₁延伸之一對的第1周壁部52a₁、52a₁、以及沿前述第2方向D₂延伸之一對的第2周壁部52a₂、52a₂，一對的第1周壁部52a₁、52a₁配設在彼此對置的位置，一對的第2周壁部52a₂、52a₂也是配設在彼此對置的位置。 In the present embodiment, each of the plurality of second recesses 52 includes a vertical wall-shaped peripheral wall portion 52a that extends toward the lower surface 1b side in a state continuous with the first bottom portion 51a, and a lower end side that is provided on the peripheral wall portion 52a. The second bottom portion 52b. The peripheral wall portion 52a line includes: _a first extending peripheral wall portion of one of the pair along the first direction D 52a _{_1,} 52a _1, and ₂ extending along the second direction D 2 of the second circumferential wall portion of one of the pair 52a _2, 52a ₂ , the pair of first peripheral wall portions 52a ₁ and 52a _{1 are} disposed at positions facing each other, and the pair of second peripheral wall portions 52a ₂ and 52a ₂ are also disposed at positions facing each other.

而且，如圖1及圖3所示般，在一對的第1周壁部52a₁、52a₁分別形成有：從第1凹部51的內部空間通到第2面1b之孔部53。在本實施形態中，孔部53，是在一對的第1周壁部52a₁、52a₁各個分別設有1個，孔部53形成於第1周壁部52a₁之靠第2底部52b的位置(因此，在1個第1凹部51存在有2個孔部53)。另一方面，在一對的第2周壁部52a₂、52a₂，並不存在相當於孔部53者，各第2周壁部52a₂成為其下端側全部與第2底部52b直接連結的狀態。 Further, as shown in FIG. 1 and FIG. 3, the pair of first peripheral wall portions 52a ₁ and 52a ₁ are respectively formed with a hole portion 53 that passes from the internal space of the first recess portion 51 to the second surface 1b. In the present embodiment, the hole portion 53 is provided in each of the pair of first peripheral wall portions 52a ₁ and 52a ₁ , and the hole portion 53 is formed in the second bottom portion 52 b of the first peripheral wall portion 52 a ₁ . (Therefore, there are two hole portions 53 in one first recess 51). On the other hand, the pair of the second peripheral wall portion 52a _{_2,} 52a _2, there is no portion corresponding to the hole 53 by each of the second peripheral wall portion 52a ₂ in a state that the entire lower side of the second bottom portion 52b is directly connected.

在本發明的吸收性物品用不織布中，第2凹部的設置，係為了儘量減少溝槽部的槽底、更具體的是第1凹部的第1底部接觸吸收性物品之穿戴者皮膚的機會，縱使前述第1底部接觸穿戴者的皮膚，也能儘量減少其接觸面積。亦即，本發明的吸收性物品用不織布構成為，依凸部、其次為第1凹部之第1底部的順序而容易接觸穿戴者的皮膚，而具有在前述不織布當中柔軟性最高的凸部比前述第1底部更容易接觸穿戴者的皮膚之理想構造，再者，在本發明的吸收性物品用不織布中，考慮到接觸穿戴者的皮膚之接觸面積越少則越容易感覺柔軟性，設置上述第2凹部而形成第1凹部不存在的部分，藉此在第1凹部的第1底部使接觸穿戴者皮膚的部分更加減少，而能儘量減少接觸皮膚的機會及接觸面積。 In the nonwoven fabric for absorbent articles of the present invention, the second concave portion is provided so as to minimize the chance of the groove bottom of the groove portion, more specifically, the first bottom portion of the first concave portion contacting the wearer's skin of the absorbent article. Even if the first bottom touches the wearer's skin, the contact area can be minimized. In other words, the non-woven fabric for absorbent articles of the present invention is configured to easily contact the skin of the wearer in the order of the convex portion and the first bottom portion of the first concave portion, and has the convex portion having the highest flexibility among the nonwoven fabrics. In the non-woven fabric for absorbent articles of the present invention, the first bottom portion is more likely to be in contact with the wearer's skin, and the softer one is more likely to be felt in consideration of the smaller contact area of the skin contacting the wearer. The second recess forms a portion where the first recess does not exist, whereby the portion contacting the wearer's skin is further reduced at the first bottom portion of the first recess, and the chance of contact with the skin and the contact area can be minimized.

此外，本發明中的第2凹部，為了抑制與該第2凹部接觸所產生的異常感、異物感，係設置在前述第1凹部的第1底部，而使前述第2凹部接觸穿戴者皮膚的機會儘量減少。 Further, the second concave portion in the present invention is provided in the first concave portion in order to suppress an abnormal feeling or a foreign body sensation caused by contact with the second concave portion. The first bottom portion minimizes the chance of the second recess contacting the wearer's skin.

在本發明中，第2凹部的深度，亦即從第1凹部之第1底部之第1面(上表面)側的高度到第2凹部之第2底部之第1面側的高度之長度，較佳為0.05~2mm，更佳為0.075~1.5mm，特佳為0.1~1mm。當前述第2凹部的深度未達0.05mm時，難以確保後述第2底部的剛性，不織布之厚度方向的強度容易不足。另一方面，當前述第2凹部的深度超過2mm時，在與吸收性物品之其他構件(例如，吸收體、不織布、薄膜等)貼合時，厚度方向的強度容易不足，此外，當壓縮時，可能產生堅硬感。 In the present invention, the depth of the second concave portion, that is, the length from the height of the first surface (upper surface) side of the first bottom portion of the first concave portion to the height of the first surface side of the second bottom portion of the second concave portion, It is preferably 0.05 to 2 mm, more preferably 0.075 to 1.5 mm, and particularly preferably 0.1 to 1 mm. When the depth of the second concave portion is less than 0.05 mm, it is difficult to secure the rigidity of the second bottom portion to be described later, and the strength in the thickness direction of the nonwoven fabric is likely to be insufficient. On the other hand, when the depth of the second concave portion exceeds 2 mm, the strength in the thickness direction tends to be insufficient when it is bonded to another member (for example, an absorbent body, a nonwoven fabric, a film, or the like) of the absorbent article, and when compressed, , may produce a sense of hard.

此外，關於前述第2凹部的深度和前述凸部的高度之關係，前述第2凹部的深度(亦即，從第1凹部之第1底部之第1面側的高度到第2凹部之第2底部之第1面側的高度之長度)，較佳為前述凸部的高度(亦即，從第1凹部之第1底部之第1面側的高度到凸部之頂部的高度之長度)的10~80%，更佳為15~70%，特佳為20~60%。當前述第2凹部的深度未達前述凸部的高度之10%時，無法確保在前述第2凹部的周壁部之孔部形成空間，因此孔部形成為不完全的形狀或根本無法形成，難以獲得作為不織布之優異的柔軟性。相反的，當前述第2凹部的深度超過前述凸部的高度之80%時，孔部形成為過大，因此前述第2凹部之周壁部的強度降低而容易起毛，可能造成不織布的觸感降低。 Further, regarding the relationship between the depth of the second concave portion and the height of the convex portion, the depth of the second concave portion (that is, the height from the first surface side of the first bottom portion of the first concave portion to the second concave portion) The length of the height of the first surface side of the bottom portion is preferably the height of the convex portion (that is, the length from the height of the first surface side of the first bottom portion of the first concave portion to the height of the top portion of the convex portion). 10~80%, more preferably 15~70%, especially good 20~60%. When the depth of the second concave portion is less than 10% of the height of the convex portion, it is not possible to secure a space in the hole portion of the peripheral wall portion of the second concave portion. Therefore, the hole portion is formed in an incomplete shape or cannot be formed at all, which is difficult. Excellent flexibility as a non-woven fabric is obtained. On the other hand, when the depth of the second concave portion exceeds 80% of the height of the convex portion, the hole portion is formed to be excessively large, so that the strength of the peripheral wall portion of the second concave portion is lowered and the hair is easily raised. May cause a decrease in the feel of the non-woven fabric.

此外，第2凹部之第1方向的長度，沒有特別的限制，較佳為0.25~5mm，更佳為0.5~3mm，特佳為0.75~2mm。當前述第2凹部之第1方向的長度未達0.25mm時，前述第2凹部變得過小，利用前述第2凹部所發揮的上述作用可能無法充分獲得。當前述第2凹部之第1方向的長度超過5mm時，前述第2凹部在第1方向過長，相較於平坦的不織布或不存在凹部的不織布，在柔軟性方面不容易差異化，難以獲得柔軟的觸感。 Further, the length of the second concave portion in the first direction is not particularly limited, but is preferably 0.25 to 5 mm, more preferably 0.5 to 3 mm, and particularly preferably 0.75 to 2 mm. When the length of the second concave portion in the first direction is less than 0.25 mm, the second concave portion is too small, and the above-described action by the second concave portion may not be sufficiently obtained. When the length of the second recessed portion in the first direction exceeds 5 mm, the second recessed portion is excessively long in the first direction, and the nonwoven fabric is not easily distinguished from the flat nonwoven fabric or the non-woven fabric having no recessed portion, and it is difficult to obtain flexibility. Soft touch.

另一方面，第2凹部之第2方向的長度，沒有特別的限制，較佳為0.25~5mm，更佳為0.5~3mm，特佳為0.75~2mm。當前述第2凹部之第2方向的長度未達0.25mm時，前述第2凹部變得過小，特別是第2底部的形成變得不完全，因此利用前述第2凹部所發揮之上述作用可能無法充分獲得。當前述第2凹部之第2方向的長度超過5mm時，前述第2凹部變得過大，與不織布接觸時容易產生異常感、異物感。 On the other hand, the length of the second concave portion in the second direction is not particularly limited, but is preferably 0.25 to 5 mm, more preferably 0.5 to 3 mm, and particularly preferably 0.75 to 2 mm. When the length of the second concave portion in the second direction is less than 0.25 mm, the second concave portion is too small, and in particular, the formation of the second bottom portion is incomplete. Therefore, the above-described action of the second concave portion may not be possible. Fully obtained. When the length of the second concave portion in the second direction exceeds 5 mm, the second concave portion is excessively large, and when it comes into contact with the nonwoven fabric, an abnormal feeling or a foreign body sensation is likely to occur.

此外，第2凹部之在第2方向的節距(亦即，在第2方向之相鄰第2凹部彼此的距離)沒有特別的限制，較佳為1.5mm以下。當該第2凹部之在第2方向的節距為1.5mm以下時，構成不織布之前述第1纖維層內的棉容易被保持於前述第2凹部的第2底部，因此在前述第2底部，上述般之纖維層的***、各纖維層間之層間剝離更不容易發生。 Further, the pitch of the second concave portion in the second direction (that is, the distance between the adjacent second concave portions in the second direction) is not particularly limited, but is preferably 1.5 mm or less. When the pitch of the second concave portion in the second direction is 1.5 mm or less, the cotton in the first fiber layer constituting the nonwoven fabric is easily held by the second bottom portion of the second concave portion. Therefore, at the second bottom portion, The splitting of the fiber layer as described above and the interlayer peeling between the fiber layers are less likely to occur.

在本發明中，關於形成於前述第2凹部之周壁部的孔部，該孔部之最大部分的長度(本實施形態的情況，是第1方向的長度)，雖還取決於前述第2凹部的大小，其較佳為0.25~5mm，更佳為0.5~3mm，特佳為0.75~2mm。當前述孔部之最大部分的長度未達0.25mm時，孔部的形成變得不完全，前述第2凹部的柔軟性無法充分確保，且前述凸部之纖維的張力不容易降低，前述凸部的柔軟性無法充分確保。當前述孔部之最大部分的長度超過5mm時，孔部變得過大，該孔部之周緣部容易起毛，與不織布接觸時容易產生異常感、異物感，可能造成不織布的觸感降低。 In the present invention, the length of the largest portion of the hole portion formed in the peripheral wall portion of the second recess portion (the length in the first direction in the case of the first embodiment) depends on the second recess portion. The size is preferably 0.25 to 5 mm, more preferably 0.5 to 3 mm, and particularly preferably 0.75 to 2 mm. When the length of the largest portion of the hole portion is less than 0.25 mm, the formation of the hole portion is incomplete, the flexibility of the second concave portion is not sufficiently ensured, and the tension of the fiber of the convex portion is not easily lowered, and the convex portion is not easily lowered. The softness cannot be fully ensured. When the length of the largest portion of the hole portion exceeds 5 mm, the hole portion becomes excessively large, and the peripheral portion of the hole portion is likely to fluff, and when it comes into contact with the nonwoven fabric, an abnormal feeling or a foreign body sensation is likely to occur, and the touch of the nonwoven fabric may be lowered.

另一方面，孔部之高度方向(亦即，不織布的厚度方向)之最大長度，雖還取決於前述第2凹部的深度，較佳為0.1~5mm，更佳為0.25~3mm，特佳為0.5~2mm。當前述孔部之高度方向之最大長度未達0.1mm時，孔部的形成變得不完全，前述第2凹部的柔軟性無法充分確保，且前述凸部之纖維的張力不容易降低，前述凸部的柔軟性也無法充分確保。當前述孔部之高度方向之最大長度超過5mm時，孔部變得過大，該孔部的周緣部容易起毛，與不織布接觸時容易產生異常感、異物感，可能造成不織布的觸感降低。 On the other hand, the maximum length of the height direction of the hole portion (that is, the thickness direction of the non-woven fabric) depends on the depth of the second concave portion, and is preferably 0.1 to 5 mm, more preferably 0.25 to 3 mm, particularly preferably 0.5~2mm. When the maximum length of the hole portion in the height direction is less than 0.1 mm, the formation of the hole portion is incomplete, the flexibility of the second recess portion is not sufficiently ensured, and the tension of the fiber of the convex portion is not easily lowered. The softness of the part cannot be fully ensured. When the maximum length of the hole portion in the height direction exceeds 5 mm, the hole portion becomes excessively large, and the peripheral portion of the hole portion is likely to fluff, and when it comes into contact with the nonwoven fabric, an abnormal feeling or a foreign body sensation is likely to occur, and the touch of the nonwoven fabric may be lowered.

為了將凸部之纖維的張力釋放，使凸部整體或用於形成凸部之纖維的移動自由度提高，提高凸部的柔軟性、更具體的是凸部之朝不織布的厚度方向之柔軟性、及沿不織布之第1方向(長度方向)和第2方向(寬度方向)讓皮膚滑動時的柔軟性(特別是寬度方向的柔軟性)，而確保平滑感，本發明中的前述孔部僅設置於前述第2凹部之第1周壁部。藉由孔部的形成，可對凸部賦予優異的硬軟感(朝不織布的厚度方向之優異的柔軟性)及朝不織布的第2方向之優異的粗滑感(不織布的平面方向(特別是第2方向)之優異的平滑性)雙方，而能確保不織布整體之優異的硬軟感及粗滑感，並獲得柔軟的觸感。 In order to release the tension of the fibers of the convex portion, the degree of freedom of movement of the entire convex portion or the fiber for forming the convex portion is improved, and the flexibility of the convex portion, more specifically, the softness of the convex portion toward the thickness direction of the nonwoven fabric is improved. , And the flexibility (especially the flexibility in the width direction) when the skin is slid in the first direction (longitudinal direction) and the second direction (width direction) of the non-woven fabric, and the smooth feeling is ensured, and the hole portion in the present invention is set only. The first circumferential wall portion of the second recess. By the formation of the hole portion, the convex portion can be provided with an excellent soft feeling (excellent flexibility in the thickness direction of the nonwoven fabric) and an excellent rough feeling in the second direction of the nonwoven fabric (in the plane direction of the nonwoven fabric (especially Both of them have excellent smoothness in both directions, and it is possible to ensure excellent softness and smoothness of the nonwoven fabric as a whole, and to obtain a soft touch.

此外，在本發明中，當沿不織布的第1方向(亦即，凸部及溝槽部之延伸方向)讓皮膚滑動時，為了抑制前述第2凹部所產生的高低差鉤到皮膚而確保朝不織布的第1方向之平滑性，在前述第2凹部之第2周壁部並未形成孔部。 Further, in the present invention, when the skin is slid in the first direction of the nonwoven fabric (that is, the extending direction of the convex portion and the groove portion), the hook is prevented from being hooked to the skin by the height difference caused by the second concave portion. The smoothness of the first direction of the nonwoven fabric does not form a hole portion in the second circumferential wall portion of the second recess.

亦即，前述第2周壁部構成為，與前述第1凹部的第1底部及前述第2凹部的第2底部相連而無接縫地成為一體，因此皮膚沿不織布之第1方向滑動時，皮膚不怎麼感覺到前述第2凹部的高低差而容易沿著凸部、溝槽部平滑地移動。如此，可利用凸部的柔軟性、纖維的柔軟性而確保朝不織布之第1方向的平滑性。 In other words, the second circumferential wall portion is formed integrally with the first bottom portion of the first concave portion and the second bottom portion of the second concave portion, and is integrally formed without seams. Therefore, when the skin slides in the first direction of the nonwoven fabric, the skin is formed. The height difference of the second concave portion is not felt much, and it is easy to smoothly move along the convex portion and the groove portion. In this manner, the smoothness in the first direction of the nonwoven fabric can be ensured by the flexibility of the convex portion and the flexibility of the fiber.

再者，本發明中的孔部，為了儘量遠離皮膚容易接觸的凸部、第1凹部之第1底部，儘量減少穿戴者的皮膚接觸孔部的機會，而抑制異常感、異物感的發生，該孔部係形成於前述第2凹部的第1周壁部之靠前述第2底部的位置。如此，能更穩定地確保讓皮膚沿不織布的平面方向滑動時的平滑性。 Further, in the hole portion of the present invention, in order to prevent the chance of contact between the wearer's skin and the first bottom portion as far as possible from the convex portion which is easily contacted by the skin and the first bottom portion of the first concave portion, the occurrence of abnormality and foreign body sensation is suppressed. The hole portion is formed at a position of the first peripheral wall portion of the second recessed portion that is adjacent to the second bottom portion. In this way, it is more stable to ensure that the skin is flat along the non-woven fabric. Smoothness when sliding in the face direction.

本實施形態的吸收性物品用不織布中，孔部53具備有周緣部53a，該周緣部53a並不是將前述不織布1所含的熱塑性樹脂纖維熔化而是使該熱塑性樹脂纖維斷裂所形成的。更具體的說，如圖3所示般，孔部53之周緣部53a係包含：前述不織布1所含的熱塑性樹脂纖維當中藉由斷裂所形成的具有斷裂端部54a之斷裂纖維54的該斷裂端部54a。 In the nonwoven fabric for an absorbent article of the present embodiment, the hole portion 53 is provided with a peripheral edge portion 53a which is formed by not melting the thermoplastic resin fiber contained in the nonwoven fabric 1 but breaking the thermoplastic resin fiber. More specifically, as shown in FIG. 3, the peripheral edge portion 53a of the hole portion 53 includes the fracture of the fracture fiber 54 having the fracture end portion 54a formed by the fracture of the thermoplastic resin fiber contained in the nonwoven fabric 1. End 54a.

因此，孔部53的周緣部53a，將熱塑性樹脂纖維熔化而使其硬化的部分完全不存在，而是由柔軟的熱塑性樹脂纖維的一部分、或是由熱塑性樹脂纖維當中藉由斷裂所形成的具有斷裂端部54a之斷裂纖維54所形成。如此，縱使吸收性物品之穿戴者的皮膚接觸到孔部53的周緣部53a，由於藉由熔化而硬化的熱塑性樹脂纖維並不存在，能夠儘量抑制不織布的堅硬感、粗糙感。 Therefore, the peripheral portion 53a of the hole portion 53 has a portion in which the thermoplastic resin fiber is melted and hardened, but is not present in a part of the soft thermoplastic resin fiber or is formed by breaking the thermoplastic resin fiber. The fracture fiber 54 of the fracture end 54a is formed. In this way, even if the skin of the wearer of the absorbent article comes into contact with the peripheral edge portion 53a of the hole portion 53, the thermoplastic resin fiber which is hardened by melting does not exist, and the feeling of roughness and roughness of the nonwoven fabric can be suppressed as much as possible.

在此，斷裂纖維54，係形成第1周壁部52a₁的熱塑性樹脂纖維之一部分的纖維，且具有：將該熱塑性樹脂纖維朝長度方向拉伸或物理性地切斷而使其斷裂所形成的斷裂端部54a。 Here, the broken fibers 54, forming a fiber-based portion of the first peripheral wall portion 52a ₁ of the thermoplastic resin fiber and having: the thermoplastic resin fiber is stretched in the longitudinal direction of the cutting or physically formed by break The end portion 54a is broken.

因此，斷裂端部54a，不是像將熱塑性樹脂纖維熔化的情況那樣成為纖維的端部溶化變圓而使纖維直徑變大，而是藉由將纖維切碎而成為前端變細的態樣、或是纖維直徑幾乎沒有變化的態樣。如此，縱使穿戴者的皮膚接觸到孔部53之周緣部53a的情況，仍可抑制硬化、纖維的鉤住所帶來的異常感發生。 Therefore, the fracture end portion 54a is not melted into the end portion of the fiber as in the case where the thermoplastic resin fiber is melted, and the fiber diameter is increased, and the fiber is chopped to form a tapered end portion, or It is a state in which the fiber diameter hardly changes. Thus, even if the skin of the wearer comes into contact with the peripheral edge portion 53a of the hole portion 53, the hardening and the hook of the fiber can be suppressed. The sense of abnormality brought about by the residence occurred.

再者，在孔部53的內部空間53b，如圖3所示般，熱塑性樹脂纖維當中的一部分的纖維55會橫越。此外，在一部分的斷裂纖維54，其斷裂端部54a成為延伸到孔部53的內部空間53b內的狀態。 Further, in the internal space 53b of the hole portion 53, as shown in Fig. 3, a part of the fibers 55 of the thermoplastic resin fibers are traversed. Further, in a part of the fracture fiber 54, the fracture end portion 54a is in a state of extending into the internal space 53b of the hole portion 53.

因此，在孔部53的內部空間53b內，成為橫越該內部空間53b的纖維55和一部分的延伸出的纖維混合存在的狀態，而不是完全開放的空間。如此，構成為在孔部的內部空間讓熱塑性樹脂纖維的一部分橫越，縱使穿戴者的皮膚接觸到孔部的情況，橫越內部空間的熱塑性樹脂纖維可儘量減少凹部的周面、底部與孔部在感覺上的不同，讓穿戴者不容易產生異常感。亦即，橫越孔部的內部空間之熱塑性樹脂纖維，可避免穿戴者的皮膚完全穿越孔部而到達不織布的第2面側(下表面側)，使前述周壁部或第2底部與孔部之邊界的高低差在觸感上變小，如此，不織布的觸感變得比較平滑，縱使穿戴者的皮膚接觸到孔部的情況，仍不容易讓穿戴者產生異常感。 Therefore, in the internal space 53b of the hole portion 53, the fibers 55 that traverse the internal space 53b and a part of the extended fibers are mixed, and are not completely opened. In this way, a part of the thermoplastic resin fiber is traversed in the inner space of the hole portion, and the thermoplastic resin fiber that traverses the inner space can minimize the circumferential surface, the bottom portion, and the hole of the concave portion even when the wearer's skin contacts the hole portion. The difference in perception makes the wearer less prone to abnormalities. In other words, the thermoplastic resin fiber that traverses the inner space of the hole portion prevents the wearer's skin from completely passing through the hole portion and reaches the second surface side (lower surface side) of the nonwoven fabric, and the peripheral wall portion or the second bottom portion and the hole portion are prevented. The height difference of the boundary becomes small in the sense of touch. Thus, the touch of the non-woven fabric becomes smoother, and even if the wearer's skin comes into contact with the hole portion, it is not easy for the wearer to feel abnormal.

在本發明中，前述孔部的內部空間之開孔率較佳為1~50%，更佳為1.5~35%，特佳為2.5~20%。當前述孔部之內部空間的開孔率未達1%時，開孔率過低而無法對凸部、凸部的纖維賦予自由度，無法充分確保凸部的柔軟性。當前述孔部之內部空間的開孔率超過50%時，設有孔部之周壁部(本實施形態的情況，是第1周壁部52a₁)的強度容易降低，且孔部之周緣部的邊界在觸感上變得容易認識。然而，依據使用不織布之吸收性物品的種類、用途等，孔部之內部空間的開孔率亦可為上述範圍以外，而能任意地設定。 In the present invention, the opening ratio of the inner space of the hole portion is preferably from 1 to 50%, more preferably from 1.5 to 35%, particularly preferably from 2.5 to 20%. When the opening ratio of the internal space of the hole portion is less than 1%, the opening ratio is too low, and the degree of freedom of the fibers of the convex portion or the convex portion cannot be imparted, and the flexibility of the convex portion cannot be sufficiently ensured. When the opening ratio of the internal space of the hole portion exceeds 50%, the strength of the peripheral wall portion in which the hole portion is provided (in the case of the first embodiment, the first circumferential wall portion 52a ₁ ) is easily lowered, and the peripheral portion of the hole portion is The border becomes easy to recognize on the touch. However, depending on the type, use, and the like of the absorbent article using the nonwoven fabric, the opening ratio of the internal space of the hole portion may be outside the above range, and can be arbitrarily set.

以下，針對具有上述特定的凹凸構造之吸收性物品用不織布1的製造方法，參照圖式詳細地說明。 Hereinafter, a method of manufacturing the nonwoven fabric 1 for an absorbent article having the above-described specific uneven structure will be described in detail with reference to the drawings.

圖5~圖8係顯示用於製造吸收性物品用不織布1之製造裝置的一例，製造裝置6係用於將包含第1纖維層2及第2纖維層3之由2層的纖維層所構成之纖維積層體7加工成具有上述特定的凹凸構造之吸收性物品用不織布1。第1纖維層2含有棉2a及熱塑性樹脂纖維2b；第2纖維層3係與前述第1纖維層2的單面鄰接，含有熱塑性樹脂纖維3a且不含棉。前述製造裝置6係具備退繞裝置61、預熱裝置62以及賦形裝置63。退繞裝置61，是將加工前的前述纖維積層體7捲繞成捲筒狀，將前述纖維積層體7朝向搬運方向MD進行退繞；預熱裝置62，是將藉由前述退繞裝置61退繞後之纖維積層體7施加預熱；賦形裝置63，是將施加預熱後的纖維積層體7延伸，進行用於形成凸部及溝槽部(包含第1凹部及第2凹部)之凹凸賦形加工。 5 to 8 show an example of a manufacturing apparatus for manufacturing the nonwoven fabric 1 for an absorbent article, and the manufacturing apparatus 6 is used to form a fiber layer composed of two layers including the first fiber layer 2 and the second fiber layer 3. The fibrous laminate 7 is processed into a nonwoven fabric 1 for an absorbent article having the above-described specific uneven structure. The first fiber layer 2 contains the cotton 2a and the thermoplastic resin fiber 2b, and the second fiber layer 3 is adjacent to one surface of the first fiber layer 2, and contains the thermoplastic resin fiber 3a and does not contain cotton. The manufacturing apparatus 6 is provided with the unwinding device 61, the preheating device 62, and the shaping device 63. The unwinding device 61 winds the fiber layered body 7 before processing into a roll shape, and unwinds the fiber layered body 7 in the conveyance direction MD. The preheating device 62 is provided by the unwinding device 61. The fiber laminate 7 after the unwinding is preheated, and the shaping device 63 extends the fiber laminate 7 to which the preheating is applied, and forms a convex portion and a groove portion (including the first concave portion and the second concave portion). The concave and convex shaping process.

在本實施形態的預熱裝置62，係具備上下一對的加熱輥子62a,62b，將從前述退繞裝置61退繞而搬運過來的加工對象之纖維積層體7，捲繞於正在旋轉之下方的加熱輥子62b上並進行加熱之後，交接給正在旋轉之上方的加熱輥子62a，藉由該加熱輥子62a將前述纖維積層體7進行加熱。 In the preheating device 62 of the present embodiment, a pair of upper and lower heating rollers 62a and 62b are provided, and the fiber layered body 7 to be processed which is unwound from the unwinding device 61 is wound around the rotating body. After heating and heating the roller 62b, it is transferred to the heating roller 62a which is rotating upward, and the fiber is laminated by the heating roller 62a. The body 7 is heated.

此外，賦形裝置63係具備上下一對的延伸輥子63a、63b，如圖6所示般，上方的延伸輥子63a係具有：在輥子寬度方向隔著一定的間隔配設且沿著該上方的延伸輥子63a之外周面設置成相互平行之複數列的突稜63a₁、以及設置在相鄰2個突稜63a₁、63a₁之間之複數列的凹槽63a₂。另一方面，如圖6及圖7所示般，在下方的延伸輥子63b之外周面63b₂具備：設置成與上方的延伸輥子63a之凹槽63a₂嚙合之複數個銷63b₁。如圖8所示般，該等銷63b₁，在輥子的寬度方向上，以與上方的延伸輥子63a之突稜63a₁不接觸的方式隔著一定的間隔配設，且在輥子的周方向上，沿著外周面63b₂以一定的間隔配設成大致直線狀。此外，本實施形態之下方的延伸輥子63b，如圖7所示般，複數個銷63b₁是在下方的延伸輥子63b之外周面63b₂配設成交錯狀。 Further, the shaping device 63 includes a pair of upper and lower extending rollers 63a and 63b. As shown in Fig. 6, the upper extending roller 63a has a predetermined interval along the roller width direction and is along the upper side. The outer peripheral surface of the extending roller 63a is provided with a plurality of rows of ribs 63a ₁ which are parallel to each other, and a plurality of rows of grooves 63a ₂ provided between the adjacent two ribs 63a ₁ and 63a ₁ . On the other hand, as shown in Fig. 6 and Fig. 7, the outer peripheral surface 63b _{2 of the} lower extending roller 63b is provided with a plurality of pins 63b _{1 which are} provided to be engaged with the grooves 63a _{2 of the} upper extending roller 63a. As shown in Fig. 8, the pins 63b ₁ are disposed at a constant interval in the width direction of the roller so as not to be in contact with the rib 63a _{1 of the} upper extending roller 63a, and are circumferentially of the roller. The upper surface 63b is disposed at a constant interval along the outer peripheral surface 63b ₂ in a substantially linear shape. Further, the present embodiment extends downward form the roller 63b, as illustrated in FIG 7, a plurality of pins _{63b. 1} are outside the roller 63b extending below the circumferential surface 63b ₂ are arranged in a staggered manner.

使用如此般構成的製造裝置6來製造吸收性物品用不織布1的情況，係依序進行：對於從退繞裝置61退繞後的加工對象之纖維積層體7施加預熱的預熱步驟、將經由預熱步驟後之前述纖維積層體7延伸而進行凹凸賦形加工之賦形步驟。 In the case where the nonwoven fabric 1 for an absorbent article is manufactured by the manufacturing apparatus 6 of such a structure, the preheating process which applies preheating to the fiber laminated body 7 after the unwinding apparatus 61 after rewinding is carried out, The forming step of the uneven forming process is performed by extending the fiber laminate 7 after the preheating step.

前述預熱步驟，是讓從退繞裝置61退繞而沿著搬運方向MD搬運過來的加工對象之纖維積層體7與預熱裝置62之正在旋轉之上下一對的加熱輥子62a,62b之外周面接觸，藉此將前述纖維積層體7加熱而施加預熱。該預熱步驟的預熱溫度，可按照構成纖維積層體7之熱塑性樹脂纖維的種類而適宜地設定，例如當熱塑性樹脂纖維為聚對苯二甲酸乙二酯(PET)和高密度聚乙烯(HDPE)組成之芯鞘型複合纖維的情況，較佳為加熱輥子的外周面之溫度為60~120℃左右。 In the preheating step, the fiber laminate 7 and the preheating device 62 of the object to be processed which are unwound from the unwinding device 61 and are conveyed in the conveyance direction MD are rotated by the upper and lower pair of heating rollers 62a, 62b. The surface layer is contacted, whereby the fiber laminate body 7 is heated to apply preheating. The preheating temperature of the preheating step can be suitably set according to the kind of the thermoplastic resin fiber constituting the fiber laminate 7, for example, when the thermoplastic resin fiber is polyethylene terephthalate (PET) and high density polyethylene ( In the case of the core-sheath type composite fiber composed of HDPE), it is preferred that the temperature of the outer peripheral surface of the heating roller is about 60 to 120 °C.

前述賦形步驟，是將經由預熱步驟而搬運過來的纖維積層體7，***賦形裝置63中之一邊嚙合一邊旋轉之上下一對的延伸輥子63a、63b之間，在互相嚙合之上方的延伸輥子63a之突稜63a₁及凹槽63a₂和下方的延伸輥子63b的銷63b₁之間將前述纖維積層體7延伸而進行賦形。在實施賦形步驟時，為了容易進行賦形，較佳為將上下一對的延伸輥子63a、63b一邊加熱至60~120℃一邊進行賦形。 In the forming step, the fiber layered body 7 conveyed through the preheating step is inserted into one of the forming devices 63 while rotating between the upper and lower pair of extending rollers 63a, 63b, above the intermeshing. The fiber laminate 7 is stretched and formed between the rib 63a ₁ and the groove 63a ₂ of the extending roller 63a and the pin 63b _{1 of the} lower extending roller 63b. When performing the shaping step, in order to facilitate the shaping, it is preferable to form the pair of upper and lower stretching rolls 63a and 63b while heating to 60 to 120 °C.

在前述賦形步驟中，上方的延伸輥子63a之突稜63a₁將其與纖維積層體7接觸的部分朝向下方的延伸輥子63b的方向壓入，藉此使凸部4賦形。另一方面，下方的延伸輥子63b之沿周方向排成一列的複數個銷63b₁，將與該銷63b₁的前端部分接觸之纖維積層體7壓入上方的延伸輥子63a之對應的凹槽63a₂內。這時，纖維積層體7當中，與銷63b₁成為非接觸狀態而被拉入凹槽63a₂內的部分，成為溝槽部5的第1凹部51。此外，與銷63b₁之前端部分接觸的部分，被用力壓入凹槽63a₂內而進行賦形，藉此形成：具有朝凸部4及溝槽部5所延伸設置的方向延伸之第1周壁部52a₁及朝輥子寬度方向延伸之第2周壁部52a₂、以及第2底部52b之第2凹部52。 In the above-described forming step, the rib 63a _{1 of the} upper extending roller 63a presses the portion in contact with the fiber laminated body 7 in the direction of the lower extending roller 63b, whereby the convex portion 4 is shaped. On the other hand, a plurality of pins 63b _{1 of the} lower extending roller 63b are arranged in a row in the circumferential direction, and the fibrous laminate 7 which is in contact with the front end portion of the pin 63b ₁ is pressed into the corresponding groove of the upper extending roller 63a. Within 63a ₂ . At this time, the portion of the fiber laminated body 7 that is pulled into the groove 63a ₂ in a non-contact state with the pin 63b ₁ becomes the first concave portion 51 of the groove portion 5. Further, a portion which is in contact with the front end portion of the pin 63b ₁ is forced into the groove 63a ₂ to be shaped, thereby forming the first portion extending in the direction in which the convex portion 4 and the groove portion 5 extend. The peripheral wall portion 52a ₁ and the second peripheral wall portion 52a ₂ extending in the roller width direction and the second concave portion 52 of the second bottom portion 52b.

第2凹部52之第2底部52b，在其形成時，是在藉由上方的延伸輥子63a和下方的延伸輥子63b將纖維積層體7嚙入的狀態下，利用銷63b₁的前端部分將纖維積層體7之抵接部分用力壓入凹槽63a₂內，因此實質上其纖維密度比不織布的其他部分更高。如此般，當配置於相鄰2個凸部4間之第2底部52b的纖維密度相對的較高時，構成前述不織布1之上述第1纖維層2所含的纖維直徑較細之熱塑性樹脂纖維2b，可和前述第1纖維層2所含的棉2a、前述第2纖維層3所含的熱塑性樹脂纖維3a更緊密地纏絡，因此在該第2底部52b中，更不容易發生上述習知技術那樣的纖維層的***、各纖維層間之層間剝離。在不織布中，藉由將這種更不容易發生纖維層的***、各纖維層間之層間剝離的部分(亦即第2底部)局部地設置複數個，縱使上述般之纖維層的***、各纖維層間的層間剝離局部地發生，在前述第2底部中仍不會發生纖維層的***、各纖維層間的層間剝離，而能有效地防止不織布整體之強度降低。 Second recessed portions of the second bottom portion 52b 52 of the, as it is formed, in the case by extending the roller 63a and the extending roller downward 63b above the fiber laminate 7 bitten state, the pin leading end portion _{63b. 1} of the fiber The abutting portion of the laminated body 7 is strongly pressed into the groove 63a ₂ , so that its fiber density is substantially higher than that of the other portions of the non-woven fabric. When the fiber density of the second bottom portion 52b disposed between the adjacent two convex portions 4 is relatively high, the thermoplastic resin fiber having a fine fiber diameter of the first fiber layer 2 constituting the nonwoven fabric 1 is formed. 2b is more closely entangled with the cotton 2a contained in the first fiber layer 2 and the thermoplastic resin fiber 3a contained in the second fiber layer 3, so that the above-described second bottom portion 52b is less likely to occur. It is known that the fiber layer is split like the technique, and the interlayer between the fiber layers is peeled off. In the non-woven fabric, by splitting a portion in which the fiber layer is more likely to be split and the interlayer between the fiber layers is peeled off (i.e., the second bottom portion), the fiber layer is split and the fibers are separated. The interlayer peeling between the layers occurs locally, and the splitting of the fiber layer and the interlayer peeling between the fiber layers are not caused in the second bottom portion, and the strength of the entire nonwoven fabric can be effectively prevented from being lowered.

而且，前述不織布1的構造，在厚度方向D_T上，從纖維密度相對低的凸部4到纖維密度最高的第2凹部52之第2底部52b存在有密度梯度，因此從前述不織布1之上表面1a(第1面)側供給的尿、經血等的體液，容易從前述不織布1之上表面1a側的凸部4透過第2底部 52b而往下表面1b(第2面)側導入，而能發揮作為吸收性物品用的不織布之優異的吸收性(特別是吸收速度、液體轉移性等)。 Further, the structure of the nonwoven fabric 1 has a density gradient in the thickness direction D _T from the convex portion 4 having a relatively low fiber density to the second bottom portion 52b of the second concave portion 52 having the highest fiber density, and thus is formed from the nonwoven fabric 1 above. The body fluid such as urine or menstrual blood supplied from the surface 1a (first surface) is easily introduced from the convex portion 4 on the upper surface 1a side of the nonwoven fabric 1 through the second bottom portion 52b to the lower surface 1b (second surface) side. It exhibits excellent absorbability (especially absorption speed, liquid transfer property, and the like) as a non-woven fabric for absorbent articles.

而且，在纖維積層體7中，與銷63b₁的前端部分之寬度方向(輥子的寬度方向)之兩端部接觸的部分，還會受到突稜63a₁將纖維積層體7朝向下方的延伸輥子63b的方向壓入時所產生的張力的作用，銷63b₁會將用於形成第1周壁部52a₁之熱塑性樹脂纖維撥開、或使纖維斷裂而形成具有斷裂端部54a的斷裂纖維54。如此，在第2凹部52形成含有斷裂纖維54的斷裂端部54a之孔部53。一部分的熱塑性樹脂纖維，以橫越孔部53之內部空間53b的狀態殘存，此外，一部分的斷裂纖維54之斷裂端部54a，成為延伸到內部空間53b內的狀態。 Further, in the portion of the fiber laminate 7 in the width direction of the front end portion of the pin 63b ₁ (the roll width direction) of both end portions of the contact, but also by the ridges 63a ₁ fiber laminate 7 extending toward the roller below The pin 63b ₁ splits the thermoplastic resin fiber for forming the first peripheral wall portion 52a ₁ or breaks the fiber to form the rupture fiber 54 having the rupture end portion 54a by the action of the tension generated when the direction of 63b is pressed. In this manner, the hole portion 53 including the fracture end portion 54a of the fracture fiber 54 is formed in the second recess portion 52. A part of the thermoplastic resin fiber remains in a state of traversing the internal space 53b of the hole portion 53, and a part of the broken end portion 54a of the broken fiber 54 is in a state of extending into the internal space 53b.

在此，孔部53是形成於第1周壁部52a₁。第1周壁部52a₁是沿著與加工對象之前述纖維積層體7的搬運方向MD平行的方向，亦即沿著延伸輥子63a、63b的旋轉方向且為凸部4及溝槽部5所延伸設置的方向。 Here, the hole portion 53 is formed in the first peripheral wall portion 52a ₁ . The first circumferential wall portion 52a ₁ is in a direction parallel to the conveyance direction MD of the fiber laminate 7 to be processed, that is, extending in the rotation direction of the extension rollers 63a and 63b and extending in the convex portion 4 and the groove portion 5. Set the direction.

經由前述賦形步驟而賦予凹凸構造後的纖維積層體，形成有上述的凸部4、以及包含第1凹部51及第2凹部52之溝槽部5，而成為吸收性物品用不織布1。該吸收性物品用不織布1，之後運用於用後即棄式紙尿布、衛生棉等的吸收性物品之表面薄片、防漏壁等。 The fiber laminate having the uneven structure is provided by the forming step, and the above-described convex portion 4 and the groove portion 5 including the first concave portion 51 and the second concave portion 52 are formed to form the nonwoven fabric 1 for an absorbent article. The non-woven fabric 1 for absorbent articles is applied to a surface sheet of an absorbent article such as a disposable disposable diaper or sanitary napkin, a leakage preventing wall, and the like.

以下，針對本發明的其他實施形態之吸收性物品用不織布做說明。 Hereinafter, a non-woven fabric for an absorbent article according to another embodiment of the present invention will be described.

在本發明的其他實施形態中，吸收性物品用不織布是由3層的纖維層所構成的纖維積層體，纖維積層體(不織布)係包含：用於形成不織布的第1面之第3纖維層(含有熱塑性樹脂纖維且不含棉)、與該第3纖維層之第2面側的面鄰接之前述第2纖維層(中間層)、以及與該第2纖維層之第2面側的面鄰接且含有棉之前述第1纖維層。依據這種構造的吸收性物品用不織布，以前述不織布之第1面成為穿戴者之皮膚對向面的方式作為吸收性物品的表面薄片來使用時，在形成表面薄片的皮膚對向面之前述第3纖維層和含棉的前述第1纖維層之間，介入作為中間層之前述第2纖維層，而使前述第3纖維層和第1纖維層隔離，使前述第1纖維層的棉所吸收、保持之尿等的體液不容易往前述第3纖維層、進而往穿戴者的皮膚傳送，因此不容易讓穿戴者感覺到潮濕的狀態或悶熱等，而不致讓穿戴者產生不舒服的感覺。 In another embodiment of the present invention, the nonwoven fabric for an absorbent article is a fibrous laminate comprising three layers of fiber layers, and the fibrous laminate (nonwoven fabric) comprises a third fibrous layer for forming the first surface of the nonwoven fabric. (containing the thermoplastic resin fiber and containing no cotton), the second fiber layer (intermediate layer) adjacent to the surface on the second surface side of the third fiber layer, and the surface on the second surface side of the second fiber layer The first fibrous layer adjacent to and containing cotton. The non-woven fabric for absorbent articles having such a structure is used as the surface sheet of the absorbent article when the first surface of the nonwoven fabric is used as the facing surface of the wearer's skin, and is formed on the skin facing surface of the surface sheet. Between the third fiber layer and the first fiber layer containing the cotton, the second fiber layer as the intermediate layer is interposed, and the third fiber layer and the first fiber layer are separated, and the first fiber layer is woven. The body fluid such as urine absorbed or retained is not easily transferred to the third fibrous layer and further to the wearer's skin, so that it is not easy for the wearer to feel a damp state or sultry, etc., without causing the wearer to feel uncomfortable. .

該其他實施形態之3層的纖維積層體之具體構造，例如為以下所示的構造。 The specific structure of the three-layer fiber laminate of the other embodiment is, for example, the structure shown below.

[第1面(皮膚對向面)側纖維層](第3纖維層) [1st surface (skin facing surface) side fiber layer] (3rd fiber layer)

纖度2.8dtex、纖維長度45mm及基重10g/m²之PET/PE芯鞘型複合纖維 PET/PE core-sheath composite fiber with a fineness of 2.8 dtex, a fiber length of 45 mm and a basis weight of 10 g/m ²

[中間層](第2纖維層) [Intermediate layer] (2nd fiber layer)

[第2面(非皮膚對向面)側纖維層](第1纖維層) [2nd surface (non-skin opposite surface) side fiber layer] (first fiber layer)

纖度2.2dtex、纖維長度44mm及基重8g/m²之PET/PE芯鞘型複合纖維、纖度1.7dtex、纖維長度45mm及基重1g/m²之PET/PE芯鞘型複合纖維、以及基重1g/m²的棉之混合物 PET/PE core-sheath composite fiber with a fineness of 2.2 dtex, a fiber length of 44 mm and a basis weight of 8 g/m ² , a 1.7 dtex fineness, a fiber length of 45 mm, and a PET/PE core-sheath type composite fiber having a basis weight of 1 g/m ² , and a base a mixture of cotton weighing 1g/m ²

此外，在本發明的其他實施形態中，吸收性物品用不織布是由3層的纖維層所構成之纖維積層體，纖維積層體(不織布)係包含：形成不織布的第1面之前述第2纖維層、與該第2纖維層之第2面側的面鄰接且含有棉之前述第1纖維層(中間層)、以及與該第1纖維層之第2面側的面鄰接之第3纖維層，第3纖維層含有熱塑性樹脂纖維且不含棉。如此般構成之吸收性物品用不織布，當以前述不織布的第1面成為穿戴者之皮膚對向面的方式作為吸收性物品的表面薄片來使用時，由於在含有棉之前述第1纖維層和設置於前述不織布的第1面之凸部的第2面側(非皮膚對向面側)的空隙部之間，介入第3纖維層，從配置於前述第3纖維層的第2面側之吸收體放出之尿等的體液之蒸發等所產生之濕氣，可利用前述第1纖維層的棉予以吸收、保持，並將其封閉在前述空隙部及前述第3纖維層中(前述空隙部所發揮的作用，是作為將從吸收體放出的濕氣維持濕氣狀態的空間；第3纖維層所發揮的作用，是作為將從吸收體放出的濕氣封閉之輔助空間)。結果，能有效地將從吸收體放出的濕氣封閉在比前述第1纖維層更靠第2面側的區域，讓穿戴者不容易感到悶熱等。 Further, in another embodiment of the present invention, the non-woven fabric for an absorbent article is a fibrous laminate comprising three layers of fiber layers, and the fibrous laminate (non-woven fabric) includes the second fiber of the first surface on which the nonwoven fabric is formed. a layer, a first fiber layer (intermediate layer) including cotton, and a third fiber layer adjacent to a surface on a second surface side of the first fiber layer, adjacent to a surface on a second surface side of the second fiber layer The third fibrous layer contains thermoplastic resin fibers and does not contain cotton. The non-woven fabric for absorbent articles having such a configuration is used as the surface sheet of the absorbent article when the first surface of the nonwoven fabric is facing the skin of the wearer, and the first fibrous layer and the cotton are contained. The third fiber layer is interposed between the gaps on the second surface side (non-skin opposing surface side) of the convex portion of the first surface of the nonwoven fabric, and is disposed on the second surface side of the third fiber layer. Moisture generated by evaporation of a body fluid such as urine released by the absorber can be absorbed and held by the cotton of the first fiber layer, and sealed in the void portion and the third fiber layer (the void portion) The function is to maintain a humid state in which the moisture released from the absorber is maintained, and the third fiber layer functions as an auxiliary space for sealing the moisture discharged from the absorber. As a result, it is possible to effectively block the moisture released from the absorber in a region on the second surface side of the first fiber layer, so that the wearer does not easily feel sultry or the like.

[第1面(皮膚對向面)側纖維層](第2纖維層) [1st surface (skin facing surface) side fiber layer] (2nd fiber layer)

纖度2.8dtex、纖維長度45mm及基重10g/m²的PET/PE芯鞘型複合纖維 PET/PE core-sheath composite fiber with a fineness of 2.8 dtex, a fiber length of 45 mm and a basis weight of 10 g/m ²

[中間層](第1纖維層) [Intermediate layer] (first fiber layer)

纖度2.2dtex、纖維長度44mm及基重8g/m²的PET/PE芯鞘型複合纖維、纖度1.7dtex、纖維長度45mm及基重1g/m²的PET/PE芯鞘型複合纖維、以及基重1g/m²的棉之混合物 PET/PE core-sheath type composite fiber with a fineness of 2.2 dtex, a fiber length of 44 mm and a basis weight of 8 g/m ^{2 ,} a PET/PE core-sheath type composite fiber having a fineness of 1.7 dtex, a fiber length of 45 mm, and a basis weight of 1 g/m ² , and a base a mixture of cotton weighing 1g/m ²

[第2面(非皮膚對向面)側纖維層](第3纖維層) [2nd surface (non-skin opposite surface) side fiber layer] (3rd fiber layer)

在上述各實施形態中，前述第3纖維層所含的熱塑性樹脂纖維，沒有特別的限制，可採用與第1纖維層或第2纖維層所含的熱塑性樹脂纖維同樣者。再者，在該等的實施形態中較佳為，各纖維層之熱塑性樹脂纖維的基重相同，且前述第2纖維層及第3纖維層所含的熱塑性樹脂纖維的纖維直徑(纖度)，分別比前述第1纖維層所含的熱塑性樹脂纖維的纖維直徑(纖度)更大。若不織布(纖維積層體)具備如此般的構造，前述第1纖維層所含的熱塑性樹脂纖維之纖維量(纖維根數)必然比前述第2纖維層及前述第3纖維層更多，因此能使含有棉之第1纖維層的強度更加提高。此外，如此般的不織布，第1纖維層的熱塑性樹脂纖維容易和第2纖維層或第3纖維層的熱塑性樹脂纖維進行纏絡，縱使構成不織布之纖維層為含有棉的情況，仍不容易發生各纖維層間的層間剝離。 In the above-described embodiments, the thermoplastic resin fiber contained in the third fiber layer is not particularly limited, and may be the same as the thermoplastic resin fiber contained in the first fiber layer or the second fiber layer. Furthermore, in the above embodiments, the basis weight of the thermoplastic resin fibers of the respective fiber layers is the same, and the fiber diameter (denier) of the thermoplastic resin fibers contained in the second fiber layer and the third fiber layer is preferably The fiber diameter (denier) of the thermoplastic resin fiber contained in the first fiber layer is larger than that of the above. When the nonwoven fabric (fiber laminate) has such a structure, the amount of fibers (the number of fibers) of the thermoplastic resin fibers contained in the first fiber layer is inevitably larger than that of the second fiber layer and the third fiber layer. The strength of the first fibrous layer containing cotton is further improved. In addition, such a non-woven fabric, the first fiber The thermoplastic resin fiber of the layer is easily entangled with the thermoplastic resin fiber of the second fiber layer or the third fiber layer, and even when the fiber layer constituting the nonwoven fabric contains cotton, delamination between the fiber layers is less likely to occur.

此外，在本發明的一實施形態之吸收性物品用不織布1中，前述第2凹部52之孔部53係設置於沿第1方向D₁所形成之一對的第1周壁部52a₁，但在本發明的吸收性物品用不織布中，並不限定於這種態樣，例如，孔部可設置於一對的第1周壁部52a₁當中之一方的周壁部，亦可設置於沿第2方向D₂所形成之一對的第2周壁部、或是其中任一個周壁部。 Further, in the absorbent article of one embodiment of the present invention, non-woven fabric 1, the hole section the second recess 52 of the 53 lines disposed in a direction of the first direction D ₁ of the first peripheral wall portion of one of the pair 52a ₁ is formed, but The non-woven fabric for absorbent articles of the present invention is not limited to such a form. For example, the hole portion may be provided in one of the pair of first peripheral wall portions 52a ₁ and may be provided along the second portion. One of the pair of second circumferential wall portions formed in the direction D ₂ or one of the peripheral wall portions.

再者，在上述實施形態的吸收性物品用不織布1中，孔部53係設置於前述第2凹部52之周壁部52a之靠第2底部52b的位置，但在本發明吸收性物品用不織布中，並不限定於這種態樣，前述孔部，在不減損不織布的柔軟性之範圍內可設置於任意的位置。 Further, in the nonwoven fabric 1 for an absorbent article according to the above-described embodiment, the hole portion 53 is provided at a position facing the second bottom portion 52b of the peripheral wall portion 52a of the second concave portion 52, but in the nonwoven fabric for an absorbent article of the present invention. The present invention is not limited to such an aspect, and the hole portion may be provided at an arbitrary position within a range that does not impair the flexibility of the nonwoven fabric.

此外，在上述實施形態之吸收性物品用不織布1中，係在前述孔部53的內部空間53b內，讓熱塑性樹脂纖維當中之一部分的纖維55橫越，但在本發明的吸收性物品用不織布中，如此般橫越孔部的內部空間之纖維亦可不存在。此外，在本發明中，不是像上述實施形態那樣使斷裂纖維的斷裂端部延伸到孔部的內部空間內亦可。 Further, in the nonwoven fabric 1 for an absorbent article according to the above-described embodiment, the fibers 55 of one of the thermoplastic resin fibers are traversed in the internal space 53b of the hole portion 53, but the nonwoven fabric for absorbent articles of the present invention is used. In this case, the fibers that traverse the inner space of the hole portion may not exist. Further, in the present invention, the broken end portion of the broken fiber may not be extended into the inner space of the hole portion as in the above embodiment.

在上述實施形態之吸收性物品用不織布1中，前述第2凹部52形成為大致長方體狀，但在本發明的吸收性物品用不織布中，第2凹部的形狀沒有特別的限制，可採用圓柱狀、角柱狀等的任意形狀。 In the nonwoven fabric 1 for an absorbent article according to the above-described embodiment, the second concave portion 52 is formed in a substantially rectangular parallelepiped shape. However, in the nonwoven fabric for absorbent articles of the present invention, the shape of the second concave portion is not particularly limited. Any shape such as a columnar shape or a prismatic column shape can be used.

再者，在上述實施形態中，凸部4是朝前述不織布1的第1方向D₁連續地延伸，但在本發明的吸收性物品用不織布中，凸部不一定要朝不織布的第1方向連續地延伸，間歇地延伸亦可。然而，第2凹部較佳為設置於：被夾在凸部的連續部分之間之第1凹部的第1底部，如此，容易讓凸部先接觸穿戴者的皮膚，且讓穿戴者的皮膚不容易接觸前述第2凹部，可抑制與前述第2凹部接觸所產生之異常感、異物感。 Further, in the above embodiment, the convex portion 4 is a first direction D 1 extends continuously from ₁ toward the non-woven fabric, but the first direction in the absorbent article of the present invention, non-woven fabric, the convex portion is not necessarily toward the non-woven fabric It can be extended continuously and intermittently. However, it is preferable that the second concave portion is provided at the first bottom portion of the first concave portion sandwiched between the continuous portions of the convex portion, so that the convex portion is easily contacted with the wearer's skin first, and the wearer's skin is not allowed. It is easy to contact the second concave portion, and it is possible to suppress an abnormal feeling or a foreign body sensation caused by contact with the second concave portion.

本發明的吸收性物品用不織布並不限制於上述實施形態等，在不脫離本發明的目的、趣旨之範圍內，可實施適宜地組合或變更等。又在本說明書中，「第1」、「第2」等的序數乃是用於區別附加該序數的事項，並不意味著各事項的順序、優先度、重要度等。 The non-woven fabric for absorbent articles of the present invention is not limited to the above-described embodiments and the like, and may be appropriately combined or changed without departing from the spirit and scope of the invention. In the present specification, the ordinal numbers such as "1st" and "2nd" are used to distinguish the order of the number, and do not mean the order, priority, importance, and the like of each item.

1a‧‧‧上表面 1a‧‧‧ upper surface

1b‧‧‧下表面 1b‧‧‧ lower surface

2‧‧‧第1纖維層 2‧‧‧1st fibrous layer

2a‧‧‧棉 2a‧‧‧ cotton

2b‧‧‧熱塑性樹脂纖維 2b‧‧‧ thermoplastic resin fiber

3‧‧‧第2纖維層 3‧‧‧2nd fibrous layer

3a‧‧‧熱塑性樹脂纖維 3a‧‧‧ thermoplastic resin fiber

4‧‧‧凸部 4‧‧‧ convex

5‧‧‧溝槽部 5‧‧‧ Groove

41‧‧‧頂部 41‧‧‧ top

51‧‧‧第1凹部 51‧‧‧1st recess

51a‧‧‧第1底部 51a‧‧‧1st bottom

52‧‧‧第2凹部 52‧‧‧2nd recess

52a‧‧‧周壁部 52a‧‧‧Walls

52a₁‧‧‧第1周壁部 52a ₁ ‧‧‧The first week of the wall

52a₂‧‧‧第2周壁部 52a ₂ ‧‧‧The second week of the wall

52b‧‧‧第2底部 52b‧‧‧2nd bottom

53‧‧‧孔部 53‧‧‧ Hole Department

Claims

一種吸收性物品用不織布，係包含第1纖維層及第2纖維層之由至少2層的纖維層所構成之吸收性物品用不織布，該第1纖維層係含有棉及熱塑性樹脂纖維；該第2纖維層係與前述第1纖維層的至少單面鄰接，含有熱塑性樹脂纖維且不含棉；前述第1纖維層所含的前述熱塑性樹脂纖維之纖維直徑，係比前述第2纖維層所含的前述熱塑性樹脂纖維之纖維直徑更細；前述不織布具有第1面及與該第1面為相反側之第2面；前述不織布具有複數個凸部及複數個溝槽部，該複數個凸部，係在前述不織布的前述第1面上朝第1方向延伸設置且在與前述第1方向正交的第2方向隔著預定的間隔設置，並朝向前述第1面的方向突出；該複數個溝槽部，是朝前述第1方向延伸設置且設置於在前述第2方向上相鄰的前述凸部之間，並朝向前述第2面的方向凹陷；前述溝槽部具有第1凹部及複數個第2凹部，該第1凹部具備有第1底部，該第1底部位於比前述凸部之頂部之前述第1面側的位置更靠前述第2面側；該複數個第2凹部，係在前述第1凹部內沿前述第1方向不連續地設置，且從前述第1底部朝向前述第2面的方向凹陷；前述第2凹部具備周壁部及第2底部，該周壁部係從前述第1底部朝向前述第2面側的方向延伸設置；該第2底部係在前述周壁部之前述第2面側的端部設置成封閉該端部，且在前述不織布當中具有最高的纖維密度。 A non-woven fabric for an absorbent article, comprising: a nonwoven fabric for an absorbent article comprising at least two fiber layers of a first fiber layer and a second fiber layer, wherein the first fiber layer contains cotton and a thermoplastic resin fiber; The fiber layer is adjacent to at least one surface of the first fiber layer, and contains thermoplastic resin fibers and does not contain cotton; and the fiber diameter of the thermoplastic resin fiber contained in the first fiber layer is larger than that of the second fiber layer. The thermoplastic resin fiber has a finer fiber diameter; the nonwoven fabric has a first surface and a second surface opposite to the first surface; and the nonwoven fabric has a plurality of convex portions and a plurality of groove portions, and the plurality of convex portions And extending in the first direction on the first surface of the non-woven fabric and in a second direction orthogonal to the first direction, and protruding in a direction toward the first surface; the plurality of The groove portion is formed to extend in the first direction and is provided between the convex portions adjacent to each other in the second direction, and is recessed toward the second surface; the groove portion has a first concave portion and a plurality of One a recessed portion, the first recessed portion is provided with a first bottom portion, the first bottom portion is located on a side of the first surface side of the top portion of the convex portion, and the plurality of second recessed portions are The first recessed portion is discontinuously disposed in the first direction, and is recessed from the first bottom portion toward the second surface; the second recessed portion includes a peripheral wall portion and a second bottom portion, the peripheral wall portion is from the first bottom portion The second bottom portion is provided at an end portion on the second surface side of the peripheral wall portion to close the second bottom surface side. The end has the highest fiber density among the aforementioned nonwoven fabrics.

如申請專利範圍第1項所述之吸收性物品用不織布，其中，前述周壁部係具有：沿著前述第1方向之一對的第1周壁部、以及沿著前述第2方向之一對的第2周壁部，在前述一對的第1周壁部之至少一方具備：通到前述第2面之孔部。 The non-woven fabric for absorbent articles according to claim 1, wherein the peripheral wall portion has a first circumferential wall portion along one of the first directions and one pair along the second direction The second peripheral wall portion includes at least one of the pair of first peripheral wall portions: a hole that opens to the second surface.

如申請專利範圍第1或2項所述之吸收性物品用不織布，其中，前述不織布的第1面，係由前述第1纖維層以外的纖維層所形成。 The non-woven fabric for absorbent articles according to the first or second aspect of the invention, wherein the first surface of the nonwoven fabric is formed of a fiber layer other than the first fiber layer.

如申請專利範圍第1至3項中任一項所述之吸收性物品用不織布，其中，前述第2凹部之在前述第2方向的節距為1.5mm以下。 The non-woven fabric for absorbent articles according to any one of the first aspect of the invention, wherein the second recess has a pitch of 1.5 mm or less in the second direction.

如申請專利範圍第1至4項中任一項所述之吸收性物品用不織布，其中，前述不織布係包含：形成前述第2面之前述第1纖維層、與該第1纖維層的第1面側之面鄰接之前述第2纖維層、以及與該第2纖維層的第1面側之面鄰接之第3纖維層，該第3纖維層含有熱塑性樹脂纖維且不含棉；各纖維層之熱塑性樹脂纖維的基重相同，前述第3纖維層所含的熱塑性樹脂纖維之纖維直徑，係與前述第2纖維層所含的熱塑性樹脂纖維之纖維直徑相同或更大。 The non-woven fabric for absorbent articles according to any one of claims 1 to 4, wherein the nonwoven fabric comprises: the first fiber layer forming the second surface; and the first fiber layer a second fiber layer adjacent to a surface on the front side and a third fiber layer adjacent to a surface on a first surface side of the second fiber layer, the third fiber layer containing thermoplastic resin fibers and containing no cotton; each fiber layer The thermoplastic resin fibers have the same basis weight, and the fiber diameter of the thermoplastic resin fibers contained in the third fiber layer is the same as or larger than the fiber diameter of the thermoplastic resin fibers contained in the second fiber layer.