JP5024833B2 - Non-woven sheet having a three-dimensional pattern - Google Patents

Description

  The present invention relates to a nonwoven fabric sheet used for sanitary products, sanitary napkins, cage sheets, paper diapers, and other absorbent articles.

  Various types of absorbent articles that absorb liquid discharged from the human body, such as urine and menstrual blood, are known. In general, an absorbent article includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet. Such absorbent articles are typified by disposable paper diapers and sanitary napkins, and absorb as much of the human body's discharge as possible, that is, urine, menstrual blood, and cages, quickly and without side leakage, It is required to be capable of being held, and further, the form is thin and light.

  In order to satisfy these performances, it is indispensable that the liquid discharged from the wearer passes through the top sheet and is absorbed and held in the absorbent layer so that the liquid can be transported quickly and the diffusibility can be improved. This is because, in a general absorbent article, the discharge from the human body, that is, urine and menstrual blood, is repeatedly dropped or inflowed into almost the same part of the liquid-permeable top sheet. For this reason, absorption will concentrate on the fixed part of an absorption layer, and the absorption of the part will become saturated easily. Further, the dropped liquid has substantially the same aspect ratio, and saturation from the lateral direction is recognized before spreading in the longitudinal direction. In this way, despite the fact that only a part of the absorbent layer is used, overflow from the top sheet, that is, a state in which side leakage is likely to occur, resulting in thickening the absorbent layer or widening the width direction, etc. Otherwise, the absorbent article cannot be secured.

  As described above, Patent Document 1 (Japanese Patent Application Laid-Open No. 2003-235894) discloses that hot air pressure embossing is applied to an airlaid nonwoven fabric made of heat-bonded fibers and pulp in order to avoid the concentration of absorption in a certain portion. A liquid diffusion sheet having a plurality of linear (stripe) high-density regions has been proposed. According to this liquid diffusion sheet, rapid liquid permeation (high liquid permeability) and diffusibility can be improved, and in particular, the vertical stripes can be prevented from leaking at the edge portion in the longitudinal direction. However, this sheet tends to become hard due to local densification, and as a result, the touch is not good.

  Further, in Patent Document 2 (Japanese Patent Laid-Open No. 2003-38567), a pattern is imparted to the mat-forming wheel that forms the fiber web, and the formed web of the convex portion is shaved to form a fiber web separator, It has been proposed to use it in absorbent articles such as sanitary napkins, incontinence products, diapers or similar articles. However, this fiber web has a very thin portion or a void (see FIG. 5), has a low strength, and is difficult to handle. Further, in order to obtain the effect of the present invention to be described later, it is necessary to reduce the size of the concave portion (recessed portion) and to make it exist densely. There is a problem that it is not appropriate.

Furthermore, Patent Document 3 (Japanese Patent Application Laid-Open No. 2002-30561) discloses that a fluid-permeable woven fabric is heat-pressed to form a concavo-convex pattern, which is used for a wet nonwoven fabric method, a foam molding method, an airlaid method, There has been proposed a method of forming a fibrous web used for absorbent articles such as toilet paper, hand wipes, industrial wipes, diapers, napkins and the like by a lace method. Although this fiber web is provided with an uneven pattern on both sides, there is no particular description as to what quality characteristics and effects the fiber web has. And since the fiber web of patent document 3 has an unevenness | corrugation in both surfaces and an unevenness | corrugation exists also in the opposite surface on the side which contacts the skin of a fiber web, the transfer of the liquid to an absorption layer becomes slow.
JP 2003-235894 A JP 2003-38567 A JP 2002-30561 A

  The present invention has high liquid permeability, enables more efficient treatment of the effluent from the human body, improves the backflow of the effluent, and reduces the contact area to the skin, thereby reducing the skin contact area. It is an object of the present invention to provide a surface sheet used for sanitary products, sanitary napkins, disposable diapers and other absorbent articles with improved comfort.

The present invention is composed of an airlaid nonwoven fabric mainly composed of a heat-bonding synthetic fiber and having a basis weight of 15 to 150 g / m ² , having a plurality of depressed portions on one side, and a ratio of fiber densities of the depressed and non-depressed portions. Is 1 / 0.8 to 1.2, the weight ratio of the depressed portion and the non-depressed portion is 1 / 1.2 to 20, and the ratio of the surface area of the depressed portion and the non-depressed portion is 1 / 1.5. The present invention relates to a nonwoven fabric sheet having a three-dimensional pattern.
Here, as a structural component of a nonwoven fabric sheet, what consists only of thermoadhesive synthetic fiber is preferable.
Further, the depressed portion is preferably substantially spherical or elliptical, and in the case of a spherical shape, the diameter is in the case of a spherical shape, and in the case of an elliptical shape, the minor axis or major axis is 1 to 8 mm and the depth is 0.5 to 5 mm. .
Next, the present invention conveys a fiber mainly composed of a predetermined amount of defibrated thermoadhesive synthetic fiber while uniformly dispersing it in an air stream, and the fiber blown out from the pores provided in the discharge part, A metal or plastic fiber collection net installed at the bottom, dropped onto the fiber collection net locally provided with a synthetic resin projection on the net, and sucked air at the bottom of the net However, the present invention relates to a method for producing a nonwoven fabric sheet having the above three-dimensional pattern, in which the fibers are deposited on the net and this operation is repeated a plurality of times as necessary.

  In the nonwoven fabric sheet of the present invention, since the surface of the depressed portion has a small contact area with the skin, the irritation to the skin is small, the wet feeling due to the discharged liquid is small, and the stuffiness is small. In addition, since there are many minute spaces between the skin and the nonwoven fabric sheet, the feeling of high humidity and stuffiness brought about by the discharged liquid is improved and the comfort is high. On the other hand, since the surface without the depressed portion on the side opposite to the surface having the depressed portion is flat, the liquid is smoothly transferred to the absorption layer.

Embodiments of the present invention will be described below.
The nonwoven fabric sheet of this invention is comprised from the air-laid nonwoven fabric which has thermoadhesive synthetic fiber as a main component and a basis weight of 15-150 g / m < ² >.
Here, “main component” means that the heat-adhesive synthetic fiber is 70% by weight or more, preferably 85% by weight or more, and about 30% by weight or less of other fibers and pulp described later. It may be included.
In addition, the nonwoven fabric sheet of the present invention is mainly composed of heat-adhesive synthetic fibers. In addition to those using 100% by weight of the heat-adhesive synthetic fibers, for example, heat-adhesive synthetic fibers + pulp fibers, or heat You may be comprised from the one or more air-laid nonwoven fabric which consists of adhesive synthetic fiber + pulp fiber + chemical binder.
In particular, the surface having the depressed portion is preferably made of only the heat-adhesive synthetic fiber, and pulp fibers may be mixed with the surface of the non-depressed portion.

  Here, the heat-adhesive synthetic fiber in the present invention may be anything as long as it is melted by heat and bonded to each other, and the nonwoven fabric itself is fixed in a network structure by the inter-fiber bond. Examples of such heat-adhesive synthetic fibers include polyolefins, polyolefins grafted with unsaturated carboxylic acids, polyesters, and polyvinyl alcohol.

  Among these, as the polyolefin-based heat-bonding synthetic fiber, a core-sheath type or an eccentric side-by-side type composite fiber is preferable. Examples of the polyolefin constituting the sheath or the outer periphery of the fiber include polyethylene and polypropylene. The polymer constituting the core component or the inner fiber layer is preferably a polymer having a melting point higher than that of the sheath and not changing at the heat bonding treatment temperature. Examples of such combinations include polyethylene / polypropylene, polyethylene / polyester, polypropylene / polyester, and the like. These polymers may be modified as long as they do not impair the action / effect of the present invention. Furthermore, it may be a fibrillar fiber. For example, SWP of Mitsui Chemicals, Inc. is mentioned.

  When the heat-bonding synthetic fiber is thin, the number of constituent fibers increases, so that the falling fibers are reduced, and the texture and the touch are also softened. If it is thick, the gap between the fibers becomes large, and it becomes a bulky nonwoven fabric, and the air permeability is also improved, so that an increase in humidity near the skin is suppressed, and the effect of reducing the feeling of stuffiness can be expected. Therefore, the thickness of the fiber may be selected according to the application, but the preferred fineness is 0.5 dt to 50 dt, and more preferably 0.8 dt to 30 dt. If it exceeds 50 dt, the resulting non-woven sheet becomes hard and unpleasant to the touch or irritation to the skin increases. On the other hand, if it is less than 0.5 dt, the productivity of the nonwoven fabric is lacking, which is not practical.

  The length of the heat-bonding synthetic fiber is preferably 1 to 15 mm. If the fibers are short, the spreadability is improved, and a more uniform nonwoven fabric is likely to be obtained. However, if the fibers are less than 1 mm, they are close to a powder form, making it difficult to form a network structure by bonding between fibers, and the strength as a nonwoven fabric is reduced. It is not preferable because it lacks properties. On the other hand, if the length is longer than 15 mm, the strength of the nonwoven fabric increases, but the fibers tend to get entangled during pneumatic transportation of the fibers during the production of the nonwoven fabric, which increases the fiber lump defects, which is not preferable. Particularly preferred is 3 to 10 mm.

  In addition to the above heat-adhesive synthetic fibers, the nonwoven fabric sheet of the present invention includes regenerated fibers such as rayon, semi-synthetic fibers such as acetate, synthetic fibers such as polyester, polypropylene, polyamide and vinylon, and fibrillar fibers such as SWP. Other fibers such as natural fibers such as pulp, cotton and hemp may be included. In this case, the proportion of the heat-adhesive synthetic fiber in the nonwoven fabric sheet is preferably 70 to 100% by weight, more preferably 85 to 100% by weight. When the amount is less than 70% by weight, there is a high possibility that the other fibers will fall off, and the wet strength may be lowered, which causes a practical problem.

These fibers forming the nonwoven fabric sheet of the present invention are thermally bonded, and the nonwoven fabric sheet is fixed in a network structure by interfiber bonding.
The nonwoven fabric sheet of the present invention has a total basis weight of 15 to 150 g / m ² , preferably 20 to 100 g / m ² . If it is less than 15 g / m ² , the strength of the nonwoven fabric is reduced, and practical problems such as nonwoven fabric manufacturing processability and handling as a product are likely to occur. On the other hand, if it exceeds 150 g / m ² , the sheet becomes stiff and the touch is also deteriorated, resulting in practical problems.

  Such a nonwoven sheet of the present invention is produced by an airlaid method. The nonwoven fabric produced by the airlaid method is preferred because the fibers forming the nonwoven fabric are randomly three-dimensionally oriented in the longitudinal direction, width direction and thickness direction of the nonwoven fabric.

Here, the nonwoven fabric by the airlaid method which concerns on this invention can be obtained as follows.
That is, a fiber mainly composed of a predetermined amount of defibrated thermoadhesive synthetic fiber is conveyed while being uniformly dispersed in an air flow, and the fiber blown out from the pores provided in the discharge unit is installed in the lower part. A metal or plastic fiber collection net, on the net, dropped onto a fiber collection net provided with a projection made of synthetic resin locally, and suctioning air at the bottom of the net Is deposited on the net, and this operation is repeated multiple times if necessary.
For example, the second and subsequent web depositions are similarly deposited on the deposition sheet.
Next, the nonwoven fabric of the present invention can be obtained by heat-treating the whole to a temperature at which this heat-adhesive synthetic fiber sufficiently exhibits its adhesive effect. In order to fully exhibit the adhesive effect, heat treatment is required at a temperature 15 to 40 ° C. higher than the melting point of the adhesive component of the thermoadhesive synthetic fiber.

When using a chemical binder resin, spray a chemical binder resin such as hot melt adhesive, latex adhesive, emulsion adhesive, or resin powder adhesive on the deposited web for each web formation. Or it may be applied.
Here, examples of components of these chemical binder resins include polyolefin-based, polyvinyl acetate-based, polyacrylate-based, synthetic rubber-based, polyurethane-based, epoxy-resin-based, and thermosetting resin-based.
The use amount of these chemical binder resins is usually ^{2 to 20} g / m ² , preferably 4 to 10 g / m ² in terms of solid content, and does not cause the bonding of synthetic fibers or pulp fibers or peeling of each layer. It is decided by.

  Moreover, functional processing, such as a deodorizer, an antibacterial agent, a fragrance | flavor, a moisturizer, a coloring agent, a hydrophilic agent, a water repellent, can also be provided to the nonwoven fabric sheet of this invention. Examples of the processing method include a method in which fibers having these functions are mixed in advance, a powdery agent is mixed, and a liquid agent is sprayed or impregnated.

  Thus, the nonwoven fabric manufactured by the airlaid method can three-dimensionally orient the fibers at random in the flow direction, width direction and thickness direction of the nonwoven fabric. And since these are thermally bonded, delamination does not occur. Moreover, since the non-woven fabric produced by the airlaid method has good uniformity, there is less variation in performance.

Here, as the fiber collection net used in the present invention, as seen in FIGS. 1 and 2, on a normal plastic or metal collection net, at regular intervals (for example, 5 mm), For example, an ultraviolet curable resin is printed or applied by screen printing, and then irradiated with ultraviolet rays to cure the resin and form a protrusion of a synthetic resin lump (for example, φ2 mm, height 1 mm). . The formation of the synthetic resin mass is not limited to the above means, but olefinic resins such as polyethylene and polypropylene, polyester elastomer resins, nylon resins, thermoplastic or curable polyurethane resins, epoxy resins, and rubber-based resins. A resin or the like in a molten state or a liquid state in which a curing agent is mixed may be directly discharged to a predetermined position on the collection net to be cooled and solidified or cured by heating. Slurry synthetic resins such as polyvinyl chloride resins can also be used. Furthermore, a foaming agent may be mixed in advance to form a foam.
Since it is necessary to apply a temperature 15 to 40 ° C. higher than the melting point of the adhesive component of the heat-bonding synthetic fiber in the heat treatment for imparting the inter-fiber bond of the airlaid web, the resin forming these synthetic resin lumps is at this temperature. The one with higher heat resistance temperature is required. The heat-resistant temperature is 140 ° C. or higher, preferably 160 ° C. or higher.

Further, the synthetic resin lump may be formed in an elliptical shape as shown in FIG. 3 in addition to a substantially spherical shape as shown in FIG. 3 is an epoxy resin block having a minor axis of 2 mm, a major axis of 5 mm, and a height of 1.5 mm. Each ellipse has a longitudinal pitch of 3 mm and a widthwise pitch. Is 3 mm.
Furthermore, the magnitude | size of protrusion (equivalent to a depression part) is suitably set by the magnitude | size corresponding to the depression part of the nonwoven fabric sheet obtained. The nonwoven fabric sheet of the present invention is obtained by heat-treating this fiber web as a whole at a temperature 15 to 40 ° C. higher than the melting point of the adhesive component of the heat-adhesive synthetic fiber. Since it often occurs, the depressed portion tends to be slightly reduced by the heat treatment. Therefore, in order to obtain the desired depth and size of the depressed portion, it is preferable to set the height and size of the resin mass (projection) to be formed on the collection net to be slightly larger in advance. For example, the ratio of the size of the depressed portion and the size of the resin mass (projection) is preferably in the range of 1 / 1.05 to 1.5. This differs depending on the thermal characteristics of the heat-adhesive synthetic fiber used, the heat treatment method, and the conditions.
In addition, the shape of the protrusion such as the synthetic resin block may be substantially spherical or elliptical, and may represent a straight line, a curved line, a lattice, a mesh, or a character, some mark, or a logo.

When a fiber web is deposited by the airlaid method using a fiber collection net having such protrusions, for example, as shown in FIG. 1, the synthetic resin lump part is non-permeable to air flow. The fiber web flows on the permeable net side, the upper part of the deposited fiber web is flush, the depression corresponding to the projection of the synthetic resin mass is formed, and the density of the fiber web takes any part A planar fiber web having a substantially uniform density is obtained.
Further, for example, if the above-described fiber web having one or two layers is formed thereon, a two-layer or three-layer fiber web can be obtained.
Next, the nonwoven fabric sheet of the present invention can be obtained by heat-treating the entire fiber web at a temperature 15 to 40 ° C. higher than the melting point of the adhesive component of the heat-bonding synthetic fiber.

The nonwoven fabric sheet of the present invention obtained as described above has a fiber density of a depressed portion (corresponding to a protrusion of a synthetic resin lump) and a non-depressed portion (web deposited on a portion where a synthetic resin lump is not formed). The ratio is 1 / 0.8 to 1.2, the weight ratio of the depressed part and the non-depressed part is 1 / 1.2 to 20, and the ratio of the surface area of the depressed part to the non-depressed part is 1/1. 5-10.
When the nonwoven fabric sheet of the present invention is used for a top sheet of an absorbent article, the contact area with the skin is small on the surface of the depression, so that the skin is less irritating and the wet liquid feels wet. Small and less stuffy. On the other hand, the surface without the depression is smooth in the liquid transfer to the absorption layer.

  Since the fiber density of the depressed portion and the non-depressed portion is substantially uniform as described above, the density ratio is 1 / 0.8 to 1.2, preferably 1 / 0.9 to 1.1. In order to make the density ratio within this range, the spinning air amount and the air suction amount under the net may be appropriately optimized when forming the air laid sheet.

  Moreover, since the nonwoven fabric sheet of this invention has the substantially uniform fiber density of the whole, the fabric weight corresponded to a depression part becomes a small thing as a result compared with a non-depression part. As a result, the weight ratio of the depressed portion and the non-depressed portion is 1 / 1.2 to 20, preferably 1 / 1.5 to 10. The ratio of the basis weight is within this numerical range by adjusting the height of the resin mass corresponding to the depression and the overall sheet basis weight. The basis weight of the depressed portion and the non-depressed portion may be measured by punching with a small punch.

Furthermore, the ratio of the surface area of the depressed part and the non-depressed part is 1 / 1.5 to 10, preferably 2 to 8. If it is less than 1/10, it is difficult to obtain the performance characteristics obtained by the depressed portion. On the other hand, if it exceeds 1 / 1.5, the depressed portions are too close to each other and the sheet strength is lowered, which is not practical.
In order to make the ratio of the surface areas within this numerical range, the resin block design should be optimized.

For example, as shown in FIG. 1, the nonwoven fabric sheet of the present invention has a plurality of depressions on one side (the collection net side), and the size of the depressions is a spherical diameter or an elliptical short shape. The diameter or major axis is 1 to 8 mm, preferably 2 to 6 mm, and the height is 0.5 to 5 mm, preferably 1 to 4 mm. If the diameter (or short diameter or diameter) of the depressed portion is less than 1 mm, the effect obtained by the depressed portion is small. On the other hand, if it exceeds 8 mm, the sheet strength is reduced, which is not practical. In addition, if the depth of the depressed portion is less than 0.5 mm, the effect obtained by the depressed portion is also small. On the other hand, if it exceeds 5 mm, the height of the resin mass becomes too high, and there are problems such as crushing and breakage. Prone to production, causing production problems.
The size of the depressed portion can be easily adjusted by changing the size of the synthetic resin lump (projection) or changing the heat treatment conditions of the fiber web.

In addition, as long as the nonwoven fabric sheet of this invention is the range of the meaning of this invention, a depression part may be perforated. Further, if the zone having a large number of depressions is 50 area% or more of the entire sheet surface, it may not be present on the entire sheet surface. For example, a zone having a large number of depressions and a zone having no depressions may coexist in alternating stripes such as vertical, horizontal, and diagonal, or a zone having a large number of depressions may be circular. Alternatively, it may be a pattern such as a square.
Furthermore, as long as it is within the scope of the present invention, the depressed portion may not have a fixed shape, and may represent a character or some pattern or logo.

Thus, the nonwoven fabric sheet of the present invention has a three-dimensional pattern in which a plurality of depressions are formed on the nonwoven fabric sheet, and a nonwoven fabric sheet having a three-dimensional pattern useful for a surface sheet of an absorbent article is obtained.
The sheet of the present invention is a sanitary product, sanitary napkin, cage sheet, paper diaper, etc., a drip absorber for a food tray that absorbs liquid such as blood generated from food, or a dry type used for humans, objectives, etc. Or a wet wiper.

Hereinafter, the present invention will be described more specifically with reference to examples.
Example 1
A commercially available two-component mixed epoxy resin (manufactured by Konishi Co., Ltd., Bond Quick 5 # 16123) is attached to a collection net made of polyethylene terephthalate (PET) so as to have a shape as shown in FIG. Used to form a dot-like resin lump. The resin lump had a diameter of 2 mm and a height of 1 mm. On top of this, a heat-adhesive conjugate fiber made of sheath PE (polyethylene) / core PET (manufactured by Teijin Fibers Ltd., 1.7 dt × 5 mm) was formed by an airlaid method so as to be 12 g / m ² . Further, a sheath PE / core PET thermoadhesive conjugate fiber (manufactured by Teijin Fibers Ltd., 2.2 dt × 5 mm) was further formed thereon by an airlaid method so as to be 12 g / m ² . Next, this 24 g / m ² airlaid two-layer web was heated at 145 ° C. using a heat oven to cause fiber-to-fiber bonding, having a depression and a non-depression on one side, and the thickness of the non-depression A nonwoven fabric sheet having a three-dimensional pattern on one side was obtained. The ratio of the size of the depressed portion and the resin mass was 1/1.
When the concave portion and the non-depressed portion of the obtained sheet were measured by punching with a small punch, the ratio of the fiber density of the depressed portion and the non-depressed portion was 1 / 1.05, and the basis weight ratio was 1/6. there were. The surface area ratio was 1 / 4.5 when the area ratio was calculated from the diameter and number of the depressions.
Furthermore, the number average of the depressions was 1.9 mm in diameter and 0.9 mm in depth.
When the surface sheet of a commercially available sanitary product was peeled off and replaced with this sheet, menstrual blood was able to be absorbed quickly and was difficult to reverse. Moreover, the smooth feeling of the skin was good, the touch was good, and it was useful.

Example 2
On the air laid web formed in the same manner as in Example 1, a mixture of heat-adhesive conjugate fiber and pulverized pulp at a ratio of 60/40% by weight was formed to 25 g / m ² by the air laid method. Using an oven, the laminate was heated at 145 ° C. to form a three-layer integrated airlaid sheet having a total weight of 49 g / m ² and a thickness of 2.7 mm. The ratio of the size of the depressed portion and the resin mass was 1/1. As the heat-adhesive conjugate fiber in the mixed layer with the pulp, a modified PE / core PP (polypropylene) sheath (manufactured by Chisso Polypro Fiber Co., Ltd., Intac, 1.7 dt × 5 mm) was used.
When the concave portion and the non-depressed portion of the obtained sheet were measured by punching with a small punch, the ratio of the fiber density of the depressed portion and the non-depressed portion was 1/1, and the basis weight ratio was 1 / 1.6. there were. The surface area ratio was 1 / 4.5 when the area ratio was calculated from the diameter and number of the depressions.
Furthermore, the number average of the depressions was 1.9 mm in diameter and 0.9 mm in depth.
When the surface of the synthetic fiber 100% depressed portion is in contact with the skin and worn as a sheet of a cage, since the pulp mixed layer has a role as a liquid absorber of the cage, it has a quick liquid absorbency, Moreover, it was a feelable sheet with no reversal.

Comparative Example 1
An airlaid collection net that does not form a resin lump was used, and other conditions were the same as in Example 1. A sheet with a thickness of 1.1 mm that was flat on both sides was obtained.
When the surface sheet was peeled off from the commercially available sanitary product and replaced in the same manner as in Example 1, there was no depressed portion, so there was a feeling of clinging to the skin, and the smooth feeling was small.

  The nonwoven fabric sheet having a three-dimensional pattern of the present invention is useful as a surface sheet used for sanitary goods, sanitary napkins, cage sheets, paper diapers and other absorbent articles. In addition, the nonwoven fabric sheet of the present invention is a drip absorber for a food tray that absorbs liquid such as blood generated from food, a food packaging sheet, or a dry or wet wiper used for people, objectives, etc. Can also be used.

In the manufacturing process of the nonwoven fabric sheet of this invention, it is explanatory drawing which shows the fiber web deposited on the collection net. It is a plane lineblock diagram of the collection net used for manufacture of the nonwoven fabric sheet of the present invention. It is a plane lineblock diagram of the collection net used for manufacture of the nonwoven fabric sheet of the present invention.

Claims (3)

It consists of an air-laid nonwoven fabric with a single yarn fineness of 0.5 to 50 dtex, a fiber length of 1 to 15 mm as the main component, and a basis weight of 15 to 150 g / m ² , and has multiple depressions on one side. The ratio of the fiber density of the depressed part and the non-depressed part is 1 / 0.8 to 1.2, and the ratio of the basis weight of the depressed part and the non-depressed part is 1 / 1.2 to 20, The ratio of the surface area of the non-depressed part is 1 / 1.5-10 , and the depressed part is spherical or elliptical spherical. The diameter is in the case of a spherical shape, and the minor axis or major axis is 1-8 mm in the case of an elliptical spherical shape. A nonwoven fabric sheet having a three-dimensional pattern , the depth of which is 0.5 to 5 mm, and the heat-adhesive synthetic fibers are further thermally bonded .   The nonwoven fabric sheet having a three-dimensional pattern according to claim 1, wherein the constituent component of the nonwoven fabric sheet is composed only of heat-adhesive synthetic fibers. A fiber mainly composed of a predetermined amount of defibrated thermoadhesive synthetic fiber is conveyed while being uniformly dispersed in an air stream, and the fiber blown out from the pores provided in the discharge section is made of metal or A plastic fiber collection net, which is dropped onto a fiber collection net locally provided with a projection made of a synthetic resin on the net, and sucking air at the bottom of the net, It is deposited on a net, and if necessary, this operation is repeated a plurality of times , and then heat treatment is performed at a temperature 15 to 40 ° C. higher than the melting point of the adhesive component of the thermoadhesive synthetic fiber. The manufacturing method of the nonwoven fabric sheet which has the three-dimensional pattern of description.

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