Absorbent article and method of manufacturing the same

Abstract

The present invention provides an absorbent article and a method for manufacturing the same. The contact efficiency between a fragrance and body fluids can be improved, fragrance can be effectively generated with a small amount of fragrance, and the manufacturing process can be simplified. The absorbent (6) is formed by subjecting a pulp stock sheet (4) to fiber splitting and pulverized pulp (5) after fiber splitting to fiber aggregation, and a fragrance (3) is added to the pulp stock sheet (4) before fiber splitting. The manufacturing method includes: a papermaking step, in which wet paper (2) is formed from a raw material (P), fragrance (3) is added to the wet paper (2), and then the wet paper (2) is dehydrated and dried to obtain a pulp stock sheet (4); and an absorbent article processing step, in which the pulp stock sheet (4) is subjected to fiber splitting and the pulverized pulp (5) after fiber splitting is subjected to fiber aggregation to manufacture an absorbent (6).

Description

Technical Field

[0001] The present invention relates to absorbent articles such as disposable diapers, urine absorbing pads, incontinence pads, sanitary napkins, etc. having a scented absorbent body, and a method for producing the same. Background Art

[0002] Conventionally, there have been known absorbent articles that generate fragrance or odor when a wearer excretes to mitigate the odor of excrement or to enable a guardian, protector, or the like to sense the wearer's excretion.

[0003] When adding fragrance to absorbent articles, in order to suppress the volatilization of fragrance components, the fragrance is contained in an inclusion material composed of cyclodextrin or the like and coated on the absorbent article. This is to prevent the loss of fragrance due to volatilization, and in the case of scented absorbent articles, it is a quality requirement to suppress the fragrance to a low level before use and generate a strong fragrance during and after use to exert a masking and harmonizing effect.

[0004] As a method of adding fragrance to absorbent articles, e.g. Figure 8 As shown, the simplest method is to apply the fragrance enclosed in cyclodextrin directly to the absorbent body during the manufacturing process of the absorbent article.

[0005] In addition, if Fig. 9 As shown, there is also the following method: in the fragrance preparation process, the inclusion reaction solution of the fragrance and cyclodextrin is dried and the unincluded fragrance is volatilized, and after the residual fragrance inclusion compound powder is recovered, it is directly added to the absorbent body or mixed with an oily solvent for coating in the manufacturing process of the absorbent article (refer to the following patent document 1).

[0006] In addition, the following Patent Document 2 discloses a method for producing a hydrogel-forming absorbent polymer impregnated with fragrance, wherein the release of fragrance when the polymer is wetted is achieved by the dynamic wettability of the polymer, the method comprising: (i) a step of mixing a solid carrier and a reaction intermediate product of the hydrogel-forming absorbent polymer before the polymerization gel point of the hydrogel-forming absorbent polymer and the fragrance; (ii) a step of forming a hydrogel-forming absorbent polymer impregnated with fragrance; and (iii) a step of drying the hydrogel-forming absorbent polymer impregnated with fragrance.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application Publication No. 2013-177424

[0010] Patent Document 2: Japanese Patent No. 3222480 Summary of the invention

[0011] However, in Figure 8 The method of directly applying the fragrance to the absorbent body has the following problem: since the fragrance is locally present in the interlayer between the absorbent body and the top sheet, the fragrance cannot efficiently contact with body fluids and is difficult to react with moisture. The method described in the above-mentioned patent document 1 also has the same problem because the complex of fragrance and cyclodextrin is bonded to the interlayer constituting the absorbent article by an adhesive.

[0012] In addition, the method described in Patent Document 1 has the problem that the production process is complicated because a drying step of drying the inclusion reaction solution and a recovery step of recovering the remaining powder of the fragrance inclusion compound are required separately from the fragrance preparation step.

[0013] In addition, in the method described in the above-mentioned Patent Document 2, since the absorbent contains a hydrogel-forming absorbent polymer impregnated with fragrance, the polymer has a strong inclusion property and there is gel blocking. In order to produce a perceptible fragrance, a large amount of fragrance is required. Such problems lead to increased costs.

[0014] Therefore, the main object of the present invention is to provide an absorbent article and a method for manufacturing the same, which can improve the contact efficiency between fragrance and body fluid, can effectively produce fragrance with a small amount of fragrance, and can simplify the manufacturing process.

[0015] In order to solve the above-mentioned problems, the present invention provides an absorbent article as a technical solution 1, comprising an absorbent body formed by fiberizing a pulp raw sheet and aggregating fibers of the fiberized pulverized pulp, characterized in that:

[0016] Fragrance is added to the pulp stock sheets before fiber splitting.

[0017] In the invention described in the above-mentioned technical solution 1, a fragrance is pre-added to the pulp stock sheet before fiber splitting, the pulp stock sheet to which the fragrance is added is subjected to fiber splitting, and the pulverized pulp after fiber splitting is subjected to fiber aggregation, thereby manufacturing an absorbent body. Therefore, the fragrance is roughly evenly dispersed throughout the entire absorbent body, the contact efficiency between the fragrance and body fluids is improved during use, and the fragrance can be effectively emitted with a small amount of fragrance.

[0018] Furthermore, in the papermaking process of pulp stock sheets, when fragrance is added to wet paper before drying, the unencapsulated fragrance is volatilized while the wet paper is dried in the papermaking process. Therefore, there is no need to separately provide a drying process for drying the encapsulated reaction solution and a recovery process for recovering the residual fragrance encapsulated compound in the process of preparing the fragrance as in the past, and the manufacturing process can be simplified.

[0019] The present invention according to claim 2 provides the absorbent article according to claim 1, wherein the fragrance is contained in an inclusion material consisting of any one or more substances selected from the group consisting of cyclodextrin, xanthan gum, guar gum, and pectin.

[0020] In the invention described in claim 2, substances that are preferably used as inclusion substances for flavoring agents are listed.

[0021] The present invention as technical solution 3 provides a method for manufacturing absorbent articles, characterized in that it includes: a papermaking process, in which wet paper is formed from raw materials, after adding fragrance to the wet paper, a pulp stock sheet is obtained by dehydrating and drying the wet paper; and a processing process of the absorbent articles, in which the pulp stock sheet is subjected to fiber splitting, and the pulverized pulp after fiber splitting is subjected to fiber aggregation to manufacture an absorbent body.

[0022] The invention described in the third technical solution is the first embodiment of adding a fragrance to a pulp stock sheet, and is an invention in which the fragrance is added to the wet paper after the wet paper is formed. Thereafter, in the process of manufacturing the absorbent article, the pulp stock sheet to which the fragrance is added is subjected to fiber splitting, and the fiberized pulverized pulp is subjected to fiber aggregation to manufacture the absorbent body, whereby the fragrance is substantially uniformly dispersed throughout the entire absorbent body, and the contact efficiency between the fragrance and the body fluid is improved during use, so that a small amount of fragrance can effectively produce fragrance.

[0023] In addition, since the fragrance is not volatilized by inclusion while the wet paper is dried in the papermaking process, there is no need to provide a drying step and a recovery step separately in the fragrance blending step, and the production process can be simplified.

[0024] The present invention as technical solution 4 provides a method for manufacturing an absorbent article described in technical solution 3, wherein the fragrance is added to a paper layer serving as an intermediate layer among paper layers stacked in multiple layers when the wet paper is formed by a multi-layer cylinder papermaking machine.

[0025] In the invention described in the fourth technical solution, when papermaking is performed using a multi-layer cylinder paper machine, the fragrance is added to a paper layer that becomes an intermediate layer in the wet paper composed of a plurality of paper layers. Thus, the paper layers that are the surface layers are covered on both sides of the intermediate layer to which the fragrance is added, so that the volatilization of the fragrance can be suppressed, and the fragrance can be prevented from transferring to the papermaking felt, resulting in the loss of the fragrance, or the attachment of the fragrance to the secondary product.

[0026] The present invention as technical solution 5 provides a method for manufacturing absorbent articles, characterized in that it includes: a papermaking process, in which wet paper is formed from a raw material mixed with a fragrance, and then a pulp stock sheet is obtained by dehydrating and drying the wet paper; and a processing process for the absorbent articles, in which the pulp stock sheet is subjected to fiber splitting, and the crushed pulp after the fiber splitting is subjected to fiber aggregation to manufacture an absorbent body.

[0027] The invention described in the above-mentioned technical solution 5 is a second embodiment of adding fragrance to pulp raw sheets, and is an invention in which the fragrance is mixed with the raw material in advance and wet paper is formed from the raw material mixed with the fragrance.

[0028] The present invention as technical solution 6 provides a method for manufacturing an absorbent article described in technical solution 5, wherein the fragrance is mixed with the raw material of a paper layer serving as an intermediate layer in a plurality of paper layers stacked in layers when the wet paper is formed by a multi-layer cylinder papermaking machine.

[0029] In the invention described in claim 6, when papermaking is performed using a multi-layer cylinder papermaking machine, a fragrance is mixed with the raw material of wet paper to be the middle layer among wet paper composed of a plurality of paper layers.

[0030] The present invention as technical solution 7 provides a method for manufacturing absorbent articles, characterized in that it includes: a papermaking process, in which wet paper is formed from a raw material, and then a pulp stock sheet is obtained by dehydrating and drying the wet paper; and a processing process of the absorbent articles, in which a fragrance is added to the pulp stock sheet, and then the pulp stock sheet is subjected to fiber splitting, and the crushed pulp after the fiber splitting is subjected to fiber aggregation to manufacture an absorbent body.

[0031] The invention described in claim 7 is a third embodiment of adding a fragrance to a pulp stock sheet, wherein the fragrance is added to the pulp stock sheet after the pulp stock sheet is manufactured by a normal papermaking process and immediately before fiber splitting.

[0032] Effects of the Invention

[0033] According to the present invention described in detail above, the contact efficiency between the fragrance and the body fluid is improved, the fragrance can be effectively produced with a small amount of fragrance, and the production process can be simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram showing the papermaking process of the first embodiment.

[0035] Figure 2 This is a schematic diagram showing an absorbent body manufacturing apparatus.

[0036] Figure 3 This is a flow chart showing the manufacturing procedure of the absorbent article according to the first embodiment.

[0037] Figure 4 This is a schematic diagram showing the papermaking process of the second embodiment.

[0038] Figure 5 This is a flow chart showing the manufacturing procedure of the absorbent article according to the second embodiment.

[0039] Figure 6 It is a schematic diagram showing an absorbent body manufacturing apparatus according to a third embodiment.

[0040] Figure 7 This is a flow chart showing the manufacturing procedure of the absorbent article according to the third embodiment.

[0041] Figure 8 This is a flow chart (part 1) showing the manufacturing method of conventional absorbent articles.

[0042] Fig. 9 This is a flow chart (part 2) showing the manufacturing method of conventional absorbent articles.

[0043] Description of symbols

[0044] 1…Cylinder paper machine, 2…Wet paper, 3…Fragrance, 4…Pulp stock sheet, 5…Pulp pulverization, 6…Absorbent, 7…Boiling trough, 8…Cylinder, 9…Papermaking felt, 10…Couch roll, 11…Cylinder papermaking section, 20…Absorbent manufacturing device, 21…Fiber gathering rotary drum, 22…Fiber splitting device, 23…Fiber supply path, P…Raw material DETAILED DESCRIPTION

[0045] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0046] The absorbent article of the present invention is a structural absorbent article having an absorbent body made of cotton pulp or the like arranged between a liquid-permeable top sheet made of porous or non-porous nonwoven fabric, perforated plastic sheet, or the like and a liquid-impermeable leakproof sheet made of polyethylene or the like. Specifically, examples thereof include disposable diapers, urine absorbent pads, incontinence pads, sanitary napkins, and the like.

[0047] The absorbent article is an absorbent article in which a pulp raw sheet obtained by a papermaking process is fiberized and the fiberized pulverized pulp is fiberized to form the absorbent body, and a fragrance is added to the pulp raw sheet before fiberization to add the fragrance to the absorbent body.

[0048] As the fragrance, it is preferred to use a substance that generates fragrance only when in contact with body fluids and generates almost no fragrance before contact. Specifically, a substance that generates fragrance by the reaction of the fragrance component itself with water, a substance in which the fragrance is contained in an inclusion substance, etc. Among them, in order to meet the quality requirements of the absorbent article with fragrance, such as preventing the loss of fragrance due to volatilization, suppressing the fragrance to a low level before use, and generating a strong fragrance during and after use to exert a masking and coordination effect, it is preferred to contain the fragrance in an inclusion substance. Such fragrance is added to the absorbent body by a prescribed method.

[0049] As the spices, any of natural spices and synthetic spices can be used, or they can be used in combination. As a specific example of spices, various synthetic spices such as saliva incense, benzoin, castor, civet, clove oil, white rosin, jasmine absolute, labdanum, matt tea, yellow sweet clover, mimosa, musk, myrrh, oak moss or moss sitter, frankincense, angelica incense, iris, patchouli, rosemary oil, sandalwood oil, vetiver oil, violet leaves, etc., higher alcohols, aldehydes, benzaldehyde, benzoic acid, cinnamic acid, cinnamaldehyde, cinnamyl alcohol, coumarin, esters, indoles, ketones, salicylic acid and related compounds, terpenoids, vanillin, etc., or mixtures of two or more thereof can be listed, but are not particularly limited to these substances. As spices, commercially available spices can also be widely used. The spices preferably use spices with high volatility.

[0050] In addition, as the fragrance, a substance having a deodorizing effect by itself or a blended fragrance that blends with the unpleasant odor of excrement to reproduce a fragrance that does not cause discomfort to humans may be used.

[0051] As a substance which produces a flavor by reacting with water itself, there are water-soluble flavors (flavors) used in beverages etc. after dissolving a flavor base in ethanol and water and extracting it.

[0052] The fragrance is preferably contained in an inclusion material consisting of at least one selected from the group consisting of cyclodextrin, xanthan gum, guar gum, and pectin. In particular, cyclodextrin is preferred because it not only produces fragrance but is also effective in adsorbing odor components of excrement.

[0053] Thus, by adding the above-mentioned fragrance to the pulp raw sheet before fiber splitting, the following effects are achieved.

[0054] First, in the absorbent article, a pulp stock sheet to which the fragrance is added is manufactured in advance, the pulp stock sheet is subjected to fiber splitting, and the pulverized pulp after fiber splitting is subjected to fiber aggregation to manufacture the absorbent body, so that the fragrance is substantially uniformly dispersed throughout the absorbent body. Therefore, compared with the conventional situation where the fragrance is locally present between predetermined layers, when the absorbent article is used, the fragrance is more efficiently contacted with the body fluid, the fragrance is easily generated, and the fragrance can be effectively generated using a small amount of the fragrance.

[0055] Second, in the papermaking process of pulp stock sheets, when the fragrance is added to the wet portion before the wet paper is dried, the unencapsulated fragrance can be volatilized while the wet paper in the papermaking process is dried. Therefore, in the fragrance preparation process, there is no need to separately provide a drying process for drying the inclusion reaction solution and a recovery process for recovering the residual fragrance inclusion compound (see Fig. 9 ), the manufacturing process can be simplified.

[0056] In this specification, the "inclusion substance" refers to a substance having the function of introducing other substances into the internal space of its own molecular structure, and the "inclusion compound" refers to a substance in a state where an inclusion substance introduces an included substance such as a fragrance.

[0057] Next, among the methods for producing the absorbent article, a method for producing the absorbent body will be described in detail.

[0058] [First embodiment]

[0059] The manufacturing method of the absorbent article of the first embodiment includes: a papermaking step such as Figure 1 and Figure 3 As shown, a wet paper 2 is formed from a raw material P by a cylinder paper machine 1, a fragrance 3 is added to the wet paper 2, and then the wet paper 2 is dehydrated and dried to obtain a pulp raw sheet 4; and a processing step of an absorbent article, such as Figure 2 and Figure 3 As shown, the pulp raw sheet 4 is subjected to fiber splitting by the absorbent manufacturing device 20, and the fiber-splitting pulverized pulp 5 is subjected to fiber aggregation to manufacture the absorbent 6. In addition, the present manufacturing method includes a fragrance blending step, such as Figure 3 As shown, the flavor and the aqueous solution of the inclusion material are mixed in a stirring container so that the flavor is covered by the inclusion material.

[0060] As the papermaking machine used in the papermaking step, a known papermaking machine such as a cylinder papermaking machine or a fourdrinier papermaking machine can be used, but Figure 1 As shown, a cylinder paper machine 1 is preferably used.

[0061] The cylinder paper machine 1 is as follows Figure 1The papermaking machine having the wire section, the pressing section, the drying section, and the winding section shown above can be a papermaking machine that has no difference in basic structure from a conventional papermaking machine.

[0062] The wire section of the cylinder paper machine 1 is briefly described. The cylinder paper machine 11 is provided in a plurality of stages, preferably three or more stages, and five stages in the example shown in the figure, in the flow direction. The cylinder paper machine 11 includes: a papermaking tank 7, which is formed into a tank with an open top, and a raw material P made of a fiber material such as pulp, which is a raw material of the absorbent body 6, is dispersed in water and stored inside the papermaking tank 7; a cylinder 8, which rotates in the raw material liquid in the cylinder 7 and forms wet paper on the surface of the papermaking tank; and a couch roll 10, which transfers the wet paper formed on the surface of the cylinder 8 to the papermaking felt 9. By providing the cylinder paper machine 11 in a plurality of stages, the paper layers transferred by the cylinder 8 of each stage are sequentially stacked, and a pulp raw roll sheet 4 formed into multiple layers can be obtained.

[0063] like Figure 1 As shown, when the wet paper 2 is formed using the multi-layer cylinder paper machine 1, the fragrance 3 is preferably added to the paper layer that becomes the middle layer among the paper layers stacked in multiple layers. That is, as shown in the example in the figure, when there are 5 stages of cylinder paper making sections 11, 11..., it is preferable to have the following structure: the fragrance 3 is added to the paper layers formed by the cylinder paper making sections 11 of the second to fourth stages from the upstream side, respectively, and the fragrance 3 is not added to the paper layers formed by the cylinder paper making sections 11 of the first stage on the most upstream side and the fifth stage on the most downstream side.

[0064] Thus, since both sides of the middle paper layer to which the fragrance 3 is added are covered by the surface paper layers, volatilization of the fragrance 3 can be suppressed, and the fragrance loss caused by transfer to the papermaking felt 9 and attachment of the aroma to secondary products can be prevented.

[0065] In order to add the fragrance 3 to the wet paper, in the other fragrance preparation process, the fragrance 3 is mixed with water or an oily solvent and a fragrance-containing solution to which the inclusion substance is added is prepared, such as Figure 1 As shown, the fragrance-containing solution is preferably sprayed from a nozzle 12.

[0066] As a composition example of the fragrance-containing solution, 88.4 wt% of water, 10.3 wt% of α-cyclodextrin, 1 wt% of fragrance, and 0.3 wt% of xanthan gum can be used. Here, xanthan gum is added together with α-cyclodextrin as an inclusion substance, thereby improving the inclusion of fragrance into α-cyclodextrin, and the moisture content temporarily increases immediately after being applied to the wet paper 2 containing water, thereby preventing the fragrance from escaping.

[0067] As a specific example of the amount of the fragrance 3 applied, 130 g / m2 per layer is applied using a cylinder paper machine 1 having a five-stage cylinder paper making unit 11. 2, 5 layers totaling 650g / m 2 When the pulp stock sheet 4 is used for papermaking, 13 g / m 2 , total 39g / m 2 This is a calculation based on the weight of 6g of the absorbent used in standard disposable diapers for infants and 0.36g of the fragrance solution (0.0036g in the fragrance monomer). However, this technology is not limited to disposable diapers for infants, but is also effective for a wide range of general disposable diapers for adults.

[0068] Next, the manufacturing process of the absorbent body 6 in the manufacturing process of the absorbent article is described in detail. Figure 2 As shown in the figure, an absorbent manufacturing device 20 is used. The absorbent manufacturing device 20 includes: a fiber collection rotating drum 21, on the outer peripheral surface of which a plurality of fiber accumulation recesses are formed at appropriate intervals in the circumferential direction; a fiber splitting device 22 for pulverizing the pulp stock sheet 4; and a fiber supply path 23 for conveying the pulverized pulp 5 pulverized by the fiber splitting device 22 to the fiber collection rotating drum 21 along the air flow. In addition, although not shown in the figure, a polymer input port can be provided in the fiber supply path 23 to mix polymer particles and the like into the pulverized pulp 5 at a predetermined ratio.

[0069] In the absorbent manufacturing device 20, the sheets fed out from the pulp stock sheet 4 made in the papermaking process are introduced into the fiber splitting device 22 and finely pulverized. The pulverized pulp 5 is conveyed to the fiber collecting rotary drum 21 on the downstream side along with the air flow in the housing constituting the fiber supply path 23 by the suction action from the fiber collecting rotary drum 21, and is accumulated in the fiber accumulation recess formed on the fiber collecting rotary drum 21.

[0070] The absorbent 6 manufactured using the absorbent manufacturing device 20 is formed by finely pulverizing the pulp stock sheet 4 to which the fragrance 3 is added in the fiber splitting device 22 and then stacking the pulp stock sheet 4, so that the fragrance 3 is roughly evenly dispersed throughout the absorbent 6 in the thickness direction and the plane direction.

[0071] [Second embodiment]

[0072] The manufacturing method of the absorbent article of the second embodiment is as follows Figure 4 and Figure 5As shown, it includes: a papermaking process, in which a fragrance 3 is mixed in a raw material liquid in advance, and a wet paper 2 is formed from the raw material P mixed with the fragrance 3, and then the wet paper 2 is dehydrated and dried to obtain a pulp stock sheet 4; and a processing process for absorbent articles, in which the pulp stock sheet 4 is subjected to fiber splitting, and the crushed pulp 5 after fiber splitting is subjected to fiber aggregation to manufacture an absorbent body 6.

[0073] When the rotary paper machine 1 is used, the fragrance 3 is as follows Figure 4 As shown, the fragrance 3 is added to the raw material P in the papermaking tank 7 of the cylinder papermaking section 11. When the fragrance 3 is added, the fragrance 3 is mixed with water or an oily solvent in the fragrance preparation step, and the fragrance solution containing the inclusion substance is prepared and then added.

[0074] Thus, the fragrance 3 is added to the wet paper 2 in a uniformly dispersed state, and therefore, the fragrance 3 is more uniformly dispersed in the absorbent body 6 by manufacturing the absorbent body 6 by fiber splitting the pulp web 4.

[0075] like Figure 4 As shown in the figure, when a multi-layer cylinder paper machine 1 having five cylinder paper making sections 11, 11, ... is used, it is preferred to add the fragrance 3 to the writing troughs 7 of the cylinder paper making sections 11, 11, ... in the middle of the second to fourth stages except for the first stage cylinder paper making sections 11, 11 on the most upstream side and the fifth stage cylinder paper making sections 11, 11 on the most downstream side. Thus, as in the first embodiment, volatilization of the fragrance 3 can be suppressed and migration of the fragrance to the papermaking felt 9 can be prevented.

[0076] As an example of the composition of the fragrance-containing solution to which the fragrance 3 is added, it can be the same as the first embodiment described above. The amount of the fragrance-containing solution added can be 2.0 to 4.0 kg / t relative to 1% of the raw material P, preferably about 3.0 kg / t. When the fragrance 3 composed of the above ratio is added to 1% of the raw material P in an amount of 3.0 kg / t, it is calculated that for 6g of the absorbent used in a standard disposable diaper for babies, 1.08g of the fragrance-containing solution 3 is prepared. However, the present technology is not limited to disposable diapers for babies, but is also effective for a wide range of general disposable diapers such as those for adults.

[0077] [Third embodiment]

[0078] The manufacturing method of the absorbent article of the third embodiment is as follows Figure 6 and Figure 7As shown, it includes: a papermaking process, after forming wet paper 2 from a raw material P, the wet paper 2 is dehydrated and dried to obtain a pulp stock sheet 4; and an absorbent article processing process, after adding a fragrance 3 to the pulp stock sheet 4, the pulp stock sheet 4 is subjected to fiber splitting, and the crushed pulp 5 after fiber splitting is subjected to fiber aggregation to manufacture an absorbent body 6.

[0079] In this manufacturing method, after pulp sheet 4 is made by a normal papermaking process, flavor 3 is added just before pulp sheet 4 is fiberized. Therefore, it is easy to add flavor 3 to pulp sheet 4, and the manufacturing process can be simplified.

[0080] In addition, in the fiber splitting process of the pulp stock sheet 4 to which the fragrance 3 is added, a drying effect can be expected due to the volatilization of the unenclosed fragrance. That is, in the process of fiber splitting the pulp stock sheet 4 and in the process of finely fiber splitting the pulverized pulp 5 to reach the fiber accumulation drum along with the air flow, a small drying effect is achieved. Although this drying effect is not as good as that of the first and second embodiments described above, it is higher than that of the conventional manufacturing method. This is shown in the following detailed examples (Table 1). The intensity of the fragrance before use of Example 5 (the third embodiment) is not lower than that of Example 1 (the first embodiment described above) and Examples 2 to 4 (the second embodiment described above), but it is also obvious that it is lower than that of Comparative Examples 1 and 2 (1.0→0.8).

[0081] The fragrance 3 is preferably added by pre-preparing a fragrance-containing solution in which the fragrance 3 is mixed with water or the like so that the fragrance is evenly dispersed on the surface of the pulp stock sheet 4, and spraying the fragrance-containing solution through the coating device 24. In this case, the moisture content of the absorbent body 6 manufactured by coating the fragrance-containing solution increases, which may cause mold. Therefore, as a countermeasure to prevent mold, it is preferable to add a preservative to the fragrance-containing solution.

[0082] As an example of the composition of the fragrance-containing solution, water 86.9 weight %, α-cyclodextrin 10.3 weight %, fragrance 1 weight %, and preservative 1.8 weight %. The coating amount of the fragrance-containing solution is 39 g / m 2 This is the amount of 0.36 g of the fragrance solution for 6 g of the absorbent used in a standard disposable diaper for babies. However, this technology is not limited to disposable diapers for babies, but is also effective for a wide range of general disposable diapers for adults.

[0083] [Example]

[0084] As shown in Table 1, absorbent bodies were manually manufactured according to the above-mentioned embodiment of the absorbent manufacturing method (manually papering pulp raw sheets, sheet crushing, absorbent body formation, and adding fragrance in each process), and the intensity of the fragrance before and after use was relatively evaluated.

[0085] In the flavoring solution, a solution A composed of 88.4% water, 10.3% α-cyclodextrin, 1.0% flavoring, and 0.3% xanthan gum was used, and a solution B composed of 86.9% water, 10.3% α-cyclodextrin, 1.0% flavoring, and 1.8% preservative was used. The solution A was used in Examples 1 to 4 and Comparative Example 1, and the solution B was used in Example 5 and Comparative Example 2.

[0086] The steps for making the absorbent are as follows.

[0087] Step 1: (1) NBKP was suspended in ion exchange water to make a 1% solution. (2) A square sheet machine (25 cm × 25 cm) was used to make a 130 g / m2 solution. 2 (3) The sheet is crushed into a cotton-like shape using a cooking mixer. (4) 6 g of crushed pulp and 10 g of absorbent polymer are mixed to make an absorbent body with a size of 10 cm wide x 35 cm long x 1 cm thick. (5) The absorbent body is coated with a 18 g / m2 weight. 2 (6) The outer periphery is then wrapped with 18g / m2 of crepe paper. 2 Hydrophilic non-woven packaging.

[0088] Step 2: (1) NBKP was suspended in ion exchange water to make a 1% solution. (2) The fragrance solution was added to the solution. (3) A square sheet machine (25 cm x 25 cm) was used to make a 130 g / m2 sheet. 2 Handmade sheet (pulp raw sheet) (the fragrance containing NBKP1% solution is stirred in the drainage layer and filtered → pressed / dried in a dryer. (4) The following is the same as step 1 (3) to (6).

[0089] Step 3: (1) NBKP was suspended in ion exchange water to make a 1% solution. (2) A square sheet machine (25 cm × 25 cm) was used to make a 130 g / m2 solution. 2 Handmade paper sheet (pulp stock sheet) (NBKP 1% solution is stirred and drained in the drainage layer → pressed / dried in a dryer → the fragrance solution is dripped onto the entire sheet with a dropper). (3) The following steps are the same as (3) to (6) of step 1.

[0090] Step 4: (1) NBKP was suspended in ion exchange water to make a 1% solution. (2) A square sheet machine (25 cm × 25 cm) was used to make a sheet with a weight of 130 g / m 2 (3) Use a cooking mixer to grind the sheet into a cotton-like shape. (4) Mix 6 g of the ground pulp and 10 g of the absorbent polymer to make an absorbent body with a width of 10 cm × a length of 35 cm × a thickness of 1 cm. (5) Use a dropper to drip the fragrance solution onto the entire absorbent body. (6) Use a weight of 18 g / m2 to coat the absorbent body. 2 (7) The outer periphery is then wrapped with 18g / m2 of crepe paper. 2 Hydrophilic non-woven packaging.

[0091] In the above steps 1 to 3, after the hand-made sheet (pulp stock sheet) is produced, the sheet is left to stand in a constant temperature room at 25°C and 50% humidity for 1 week. In the above step 4, after the absorbent is packaged with a hydrophilic nonwoven fabric, the absorbent is left to stand in a constant temperature room at 25°C and 50% humidity for 1 week.

[0092] Regarding the evaluation method of the intensity of the fragrance, the intensity of the fragrance before use and the intensity of the fragrance after use were respectively sensory evaluated, and the intensity of the fragrance before use of Comparative Example 1 was relatively evaluated as 1.0.

[0093] The intensity of the fragrance before use was evaluated by placing the absorbents prepared in the above steps into a plastic bag with a zipper, closing the zipper and opening it 5 minutes later. The intensity of the fragrance when smelling the fragrance inside the bag was rated on a 5-point scale (0, 0.5, 1.0, 1.5, 2.0 points). The evaluation was conducted among 30 evaluators (N=30), and the average score was set as the intensity of the fragrance before use.

[0094] The intensity of the fragrance after use is the intensity of the fragrance when the absorbent body is wetted by body fluids when the absorbent article is worn. The absorbent prepared according to the above steps is uniformly absorbed by 150cc of ion exchange water in the entire absorbent body, and then placed in a zippered plastic bag. The zipper is closed and then opened after 5 minutes. The intensity of the fragrance when smelling the bag is evaluated on a 5-point scale (0, 0.5, 1.0, 1.5, 2.0 points). The evaluation was conducted among 30 evaluators (N=30), and the average score was set as the intensity of the fragrance after use.

[0095] The relative evaluation of the intensity of the fragrance was performed by converting the intensity (average value) of each fragrance before and after use into a ratio with the intensity of the fragrance before use of Comparative Example 1 being 1.0. A higher value indicates a stronger fragrance.

[0096] As shown in Table 1, the results of Examples 1 to 5 of the present invention showed that the fragrance before use was suppressed and sufficient fragrance was felt after use, compared with Comparative Examples 1 and 2 in which the fragrance was spread on the absorbent. In addition, Example 5 of the present invention reacted effectively with water and produced a stronger fragrance than the fragrance intensity of Comparative Example 2 after use.

[0097] [Table 1]

[0098]

Claims

1. A method for manufacturing an absorbent article, characterized in that: include: A papermaking process, forming wet paper from raw materials, adding the fragrance obtained in the fragrance preparation process to the wet paper, and then dehydrating and drying the wet paper to volatilize the unencapsulated fragrance while drying the wet paper to obtain a pulp raw sheet, wherein the fragrance preparation process uses a stirring container to mix the fragrance and the aqueous solution of the inclusion substance so that the fragrance is covered by the inclusion substance; and The manufacturing process of the absorbent article comprises the steps of splitting the pulp stock sheet into fibers, and aggregating the fibers of the split pulp pulverized to produce an absorbent body. The wet paper is formed by a multi-layer cylinder paper machine, the fragrance is added to a paper layer that becomes an intermediate layer among the paper layers stacked in multiple layers, and the fragrance is not added to the surface paper layer, In the flavor preparation step, the flavor is mixed with water, and xanthan gum and α-cyclodextrin are added as the inclusion material to prepare a flavor-containing solution containing the flavor. The fragrance-containing solution is added to the wet paper by spraying.

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