KR200377886Y1 - Panty liner - Google Patents

Abstract

An object of the present invention is to provide a panty liner that is thin and soft and obtains a feeling of wearing which is felt as part of the crotch portion of the underwear.

The panty liner 1 is composed of a liquid holding sheet 11 and a back sheet 12 made of two nonwoven fabrics 15 and 16. The liquid holding sheet contains 60% by mass or more of cellulose-based fibers, and the stiffness measured by the cantilever method in a state where the liquid holding sheet 11 and the back sheet 12 are bonded is 40 to 110 mm per 20 mm width. It is set. Therefore, it is soft and it is easy to respond to deformation | transformation of underwear, and the contact feeling comprised integrally with underwear can be obtained.

Description

Panty Liner {PANTY LINER}

The present invention is directed to a panty liner that, when adhered to the crotch portion of the underwear, has no discomfort and obtains a contact feeling integral with the underwear.

Pantiliners are used by women to absorb vaginal secretions, such as cold, on days other than menstrual days. The panty liner is worn with the underwear while glued to the crotch portion of the underwear.

The pantiliner of the following patent document 1 is a structure in which the skin side surface of a cushioning material was covered with the surface material. The cushioning material is formed of a nonwoven fabric having a unit weight of about 40 g / m 2 bonded to the composite synthetic fibers by the thermal bonding method. By using the nonwoven fabric bonded together by the fiber by the thermal bonding method, recoverability to the deformation at the time of use is made high.

In the pantiliner described in Patent Document 2 below, a single nonwoven fabric sheet is located on the skin side, and has a liquid impermeable barrier layer on the wearing side. The said nonwoven fabric sheet forms the web which blended the rayon fiber and polyester fiber by the card method, and entangled the said fiber by the water flow sprayed from a nozzle. Moreover, the said water flow is provided, and the fiber of the surface of a nonwoven fabric sheet is moved to a horizontal direction, and the recessed part is formed. In addition, a binder solution is applied to the nonwoven fabric sheet to bond the fibers together while maintaining the shape of the recessed portion, thereby increasing the elastic return function during compression.

[Patent Document 1] Japanese Unexamined Patent Application Publication No. 8-24289

[Patent Document 2] Japanese Patent Application Laid-Open No. 7-l38865

The panty liner described in Patent Document 1 uses a nonwoven fabric bonded to fibers by a thermal bond method as a nonwoven fabric constituting the cushioning material, and the panty liner described in Patent Document 2 uses a nonwoven fabric sheet in which fibers are bonded together with a binder. have. In all cases, when the compressive force acts on the nonwoven fabric, the elastic recovery force can be exhibited.

Therefore, when these panty liners are attached to the crotch portion of the underwear and worn together with the underwear, the wearer receives the same texture as the crotch portion of the underwear is reinforced with the panty liner, and the underwear cannot flexibly follow the movement of the body. The condition causing discomfort in the groin continues.

In addition, this kind of panty liner is folded and packaged in two or three layers in a state before use. However, as described above, if the nonwoven fabric constituting the panty liner is formed by the thermal bond method, or the fibers are bonded together with a binder, the compression remains in the fold line when the panty liner is removed from the package and the panty liner is unfolded. The part is likely to remain. Furthermore, in some cases, the fiber aggregates and hardens in a fold line. When the panty liner is attached to the groin, the part of the fold line is more likely to give a foreign object to the vaginal opening and its surroundings.

Moreover, what was described in patent document 2 contains the binder in order to maintain the shape of the said nonwoven fabric sheet, and to obtain elastic return property. However, incorporation of the binder into the nonwoven sheet in direct contact around the vagina of a woman is undesirable in terms of irritation to the skin and safety to the skin.

The present invention solves the above-mentioned conventional problems, and by being thin and the same soft as the underwear made of cloth, the panty liner which can always be integrated with the underwear and can be deformed and does not give a sense of discomfort to the wearer's middle part It aims to provide.

The present invention has a liquid holding sheet and a back sheet superimposed on the wearing side of the liquid holding sheet, and in a vertically long panty liner having a length dimension in the longitudinal direction longer than a width dimension in the horizontal direction,

The liquid retaining sheet is formed of at least one nonwoven fabric and contains 60% by mass or more of cellulose fibers, and the nonwoven fabric is formed by entanglement without bonding the fibers, and the liquid retaining sheet and the back sheet are bonded to each other. It is characterized by the fact that the stiffness by the cantilever method in a longitudinal direction is 40-110 mm per 20 mm width.

The pantiliner of the present invention is composed of a liquid retaining sheet and a back sheet formed of at least one nonwoven fabric, and have a thin structure. Since the liquid holding sheet contains 60% by mass or more of cellulosic fibers, liquid such as vaginal secretions can be absorbed and retained in the liquid holding sheet. The nonwoven fabric containing the cellulosic fibers does not contain a binder therein and is not bonded to each other like a thermal bond. Therefore, the whole panty liner can be made soft, and when it adheres and wears on the crotch part of underwear, a panty liner exhibits the softness equivalent to the cloth of the crotch part of underwear, and it becomes easy to follow the deformation of the crotch part of underwear. Therefore, it is possible to obtain a texture in which the panty liner is integrated as part of the crotch portion of the underwear without giving discomfort to the groin.

Moreover, since the stiffness is 40 mm or more, the pantyliner has the rigidity necessary to maintain the shape of the product, and when the pantyliner adheres to the crotch portion of the underwear, the pantyliner is not bent more than necessary and sags downwards. It is possible to reliably adhere to the part.

Further, the pantiliner of the present invention has a compression recovery of 40 to 55% in the thickness direction.

When compression recovery in the thickness direction is in the above range, discomfort is not easily given to the groin area when it comes in contact with the vaginal ball and its surroundings. In addition, when the pantiliner is folded and packaged before use, if the compression recovery property is within the above range, when the package is opened and deployed, the recessed portion is less likely to remain in the folded line portion, and the fibers aggregate at the folded line portion. it's difficult.

For example, according to the present invention, the liquid retaining sheet is composed of two nonwoven fabrics bonded to each other, wherein the first nonwoven fabric appearing on the skin side surface and the second nonwoven fabric located on the wear side are different from each other in the blending of fibers. Both a nonwoven fabric and the said 2nd nonwoven fabric contain 30 mass% or more of cellulose fiber, and it can be comprised as it contains 60 mass% or more of cellulose fiber in the whole 2 nonwoven fabrics.

Since both the first nonwoven fabric and the second nonwoven fabric contain cellulose fibers, the stiffness and compression recovery of the liquid holding sheet can be set within the above ranges. By changing the content of cellulose fibers in the first nonwoven fabric and the second nonwoven fabric, it is possible to form a gradient of hydrophilicity in the thickness direction in the liquid holding sheet, to quickly absorb the liquid, and to secure the holding capacity of the liquid. It becomes easy to exert.

In the above, it is preferable that unit weights of both a 1st nonwoven fabric and a 2nd nonwoven fabric are 20-70 g / m <2>. Moreover, it is preferable that the total unit weight of two nonwoven fabrics is 120 g / m <2> or less.

If it is the said range, a thin and flexible panty liner can be comprised.

Another object of the present invention is that the liquid-retaining sheet is formed of one nonwoven fabric, and the nonwoven fabric is different in blending of fibers in the upper layer shown on the skin-side surface and the lower layer shown on the skin-side surface. The lower layer contains 30 mass% or more of cellulose fiber, and it can comprise as 60 mass% or more of cellulose fiber is contained in the whole nonwoven fabric.

The pantiliner of this configuration can also have the stiffness and the compressive recovery property within the above range, and a gradient of hydrophilicity can be formed by changing the mixing ratio of the cellulose fibers in the upper and lower layers.

In this case, it is preferable that the unit weight of the said 1 nonwoven fabric which comprises the said liquid holding sheet is 25-80 g / m <2>.

In this invention, it is preferable that the thickness dimension in the state in which the said liquid holding sheet and said back sheet overlapped and bonded each other is more preferably 1.2 mm or less, and more preferably 1.0 mm or less.

In addition, the pantiliner of the present invention can be configured as folded and packaged.

The pantiliner of the present invention is free from the fibers constituting the nonwoven fabric without being bonded to each other, so that the creases do not remain easily, and the dents and the aggregates of the fibers do not easily remain in the portion that was the folded line. Therefore, foreign matters do not easily occur in the vaginal ball and its surroundings when deployed and mounted.

1 is a plan view of the panty liner 1 of the first embodiment of the present invention as seen from the skin side surface, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG.

In the pantiliner 1 shown in FIG. 1, the direction along the longitudinal center line Oy is vertical, and the direction perpendicular to the longitudinal center line Oy is the horizontal direction. The pantiliner 1 has a longitudinal length shape in which the longitudinal dimension is longer than the horizontal dimension.

The front edge 1a and the rear edge 1b of the pantiliner 1 are convex curved toward the front and the rear, and the right edge 1c and the left edge 1d are concave curved toward the horizontal direction. to be. An embossed portion 2 is formed inside the front edge 1a, the rear edge 1b, and the left and right both edges 1c and 1d. The embossing part 2 is formed in a concave shape by heating and compressing it on the skin-side surface. In this embodiment, the nonwoven fabric constituting the liquid holding sheet is bonded by the embossing part 2, and the The embossing part 2 expresses the pattern of a predetermined pattern.

As shown in FIG. 2, the main body portion 10 of the panty liner 1 includes a liquid holding sheet 11 formed of two nonwoven fabrics, a back sheet 12 superimposed on the liquid holding sheet 11, and It consists of the pressure-sensitive adhesive layer 13 formed in the surface of the back sheet 11. As shown in FIG. And the release sheet 20 overlaps and adhere | attaches the back surface of the said main-body part 10, and the said pressure-sensitive adhesive layer 13 is protected. The main body portion 10 is the skin-side surface 3 on which the liquid-retaining sheet 11 is shown, and the surface on which the back sheet 12 is on the wearing-side surface 4.

The liquid holding sheet 11 is composed of a first nonwoven fabric 15 and a second nonwoven fabric 16, the first nonwoven fabric 15 appears on the skin side surface 3, and the second nonwoven fabric 16 is worn. It is located on the side. The first nonwoven fabric 15 and the second nonwoven fabric 16 are adhered through a hot melt adhesive. The amount of the hot melt adhesive applied is 5 to 30 g / m 2 so as not to impede the passage of the liquid from the first nonwoven fabric 15 to the second nonwoven fabric 16 and not to disturb the softness of the entire panty liner 30. It is set within the range of. In addition, the application amount of the hot melt adhesive which adheres between the 2nd nonwoven fabric 16 and the back sheet 12 is also the same.

The pantiliner 30 is a state in which the back sheet 12 overlaps and is bonded to the liquid holding sheet 11 and has a thickness of 1.2 mm or less, and preferably a thin structure of 1.0 mm or less. In the case where the liquid holding sheet 11 and the back sheet 12 are bonded together, the longitudinal stiffness measured by the cantilever method described later is in the range of 40 to 110 mm per 20 mm width and is very soft. It becomes the thing which can be deformed freely with cloth of the crotch part of underwear. In addition, when worn, the same texture as that of a part of the crotch portion of the underwear can be obtained, and it is difficult to give a sense of discomfort to the crotch. However, since the stiffness is 40 mm or more, it has the rigidity necessary to maintain the shape and does not inadvertently bend or bend it more than necessary when adhering to the underwear.

In addition, the compression recovery property at the time of compression to the thickness direction demonstrated later is 40 to 55%. Therefore, the recovery resistance with respect to the compressive force in the thickness direction does not become excessive, and it is not easy to give a discomfort when attached to the groin area. Moreover, since the compressive recovery is 40% or more, voids between fibers can always be formed inside the nonwoven fabric constituting the liquid retaining sheet 11, and the ability to attract liquid by capillary action in the gaps between the fibers can be achieved. Can be exercised. In addition, the liquid holding capacity in the void can be ensured, and the function of absorbing and retaining a small amount of liquid, such as vaginal discharge, can be sufficiently exhibited.

In order to make the said stiffness and compression recovery property into the said numerical range, the liquid holding sheet 11 contains 60 mass% or more of cellulose fibers in the whole. More preferably, 65 mass% or more of cellulose fibers is contained, More preferably, 70 mass% or more is contained. Although the mixing ratio of the fibers is different in the first nonwoven fabric 15 and the second nonwoven fabric 16, also in the nonwoven fabric having the smaller mixing ratio of the cellulose fibers in the first nonwoven fabric 15 and the second nonwoven fabric 16. At least 30% by mass of the cellulose fiber is included.

Although both the said 1st nonwoven fabric 15 and the 2nd nonwoven fabric 16 intertwine fiber and hold | maintain a sheet shape, the binder (binder) is not contained in a nonwoven fabric, and it is a thing which fiber adhered by this binder. none. The interweaving of the fibers is performed by a water jet method, a needling method, or the like.

As used herein, "without bonding of fibers" means that the fibers are not bonded through a binder or the surfaces of the synthetic resin fibers are melted by heat to fuse the fibers together.

In addition, when wet manufacturing the 1st nonwoven fabric 15 and the 2nd nonwoven fabric 16, the phenomenon in which a cellulose fiber hydrogen bonds by the OH group of the surface may arise by heating in the drying process. . The above "without bonding of fibers" does not mean that the hydrogen bond does not occur.

However, in order to make the panty liner 1 soft, the first nonwoven fabric 15 and the second nonwoven fabric 16 are adjusted by adjusting the heating temperature in the drying step or by adjusting the air pressure for widening the fiber spacing. It is more preferable not to easily produce the hydrogen bond of the fiber which has an OH group in it.

The unit weight of the said 1st nonwoven fabric 15 and the 2nd nonwoven fabric 16 is adjusted in the range of 20-70 g / m <2>, respectively, and the total unit weight of the 1st nonwoven fabric 15 and the 2nd nonwoven fabric 16 is carried out. It is preferable to adjust so that silver may be 120 g / m <2> or less, More preferably, it is 100 g / m <2> or less.

The first nonwoven fabric 15 and the second nonwoven fabric 16 formed in the unit weight range include 60% by mass or more of soft cellulose fibers, preferably 65% by mass or more of cellulose fibers, More preferably, since it contains 70 mass% or more, and a fiber does not adhere | attach in each nonwoven fabric and has comparatively freedom degree, stiffness and compression recovery can be set within the said numerical range.

Here, the cellulose-based fibers may be cotton, pulp, hemp, rayon, cupra, polynosyrayon, and the like, which are plant fibers. In addition to the cellulose fibers, the liquid-retaining sheet 11 may include acetate fibers, which are semi-synthetic fibers, polyamides (eg, nylon), polyvinyl alcohol (eg, vinylon), PP (polypropylene), and PE (polyethylene), which are synthetic resin fibers. ), PET (polyethylene terephthalate) and the like can be included.

In the case where the first nonwoven fabric 15 and the second nonwoven fabric 16 are spunlace nonwoven fabrics formed by the waterjet method, the treatment energy of the waterjet is 0.09 to 0.5 (kw / m 2), and the number of treatments is one to eight times. The following is preferable. The treatment energy (kw / m 2) is obtained by {1.63 × injection pressure (kgf / cm 2) × injection flow rate (m 3 / min)} ÷ processing speed (m / min).

The opening diameter of a waterjet nozzle is 70-120 micrometers, and the arrangement pitch to CD is 0.3-2.0 mm.

By setting the treatment energy of the waterjet in the above range, the fibers are not excessively entangled in the first nonwoven fabric 15 and the second nonwoven fabric 16, and the fibers can have relatively free degrees, and the liquid holding sheet 11 In the case where the and the back sheet 12 are superimposed, it is possible to make the lecture in the longitudinal direction and the compression recoverability at the time of compression within the above numerical range.

In the first embodiment, as shown in an enlarged manner in FIG. 3, the first nonwoven fabric 15 is a two-layer spunlace nonwoven fabric having an upper layer 17 and a lower layer 18.

The first nonwoven fabric 15 superimposes the upper fibrous web forming the upper layer 17 on the lower fibrous web forming the lower layer 18, and imparts a waterjet on the upper fibrous web side to the laminated fibrous web. The fibers of the fibrous web, the fibers of the lower fibrous web, the fibers of the upper fibrous web and the fibers of the lower fibrous web are interlaced to form a single nonwoven fabric.

The upper layer 17 contains cellulose fibers and hydrophobic or weak hydrophilic synthetic resin fibers, and the lower layer contains cellulose fibers and durable hydrophilic synthetic resin fibers.

Hydrophobic fiber in this specification means that the process moisture content is 0%, weakly hydrophilic fiber means that the process moisture content is less than 3% and not 0%. Hydrophilic fibers also mean that the process moisture content is at least 3% and preferably at least 5%. A process moisture content is a ratio (water content) of the mass of the water adsorb | sucked to this fiber with respect to the fiber mass when it is left to stand in the atmosphere of 65% of a relative humidity at 20 degreeC.

Cellulose fibers are hydrophilic with a process moisture content of 5% or more. Moreover, synthetic resin fibers, such as PET, can be made hydrophilic by apply | coating a hydrophilic agent, such as surfactant, to the surface, or penetrating a hydrophilic agent in resin. Alternatively, the synthetic resin fibers can be made hydrophilic by having a release cross-sectional shape having irregularities on the surface.

Since the first nonwoven fabric 15 includes hydrophobic or weak hydrophilic synthetic resin fibers in the upper layer 17 and cellulosic fibers and hydrophilic synthetic resin fibers in the lower layer 18, the lower layer 18 is formed in an upper layer ( The hydrophilicity is higher than that of 17, and the liquid can be quickly drawn from the upper layer 17 toward the lower layer 18. In addition, since the first nonwoven fabric 15 contains synthetic resin fibers in the upper layer 17 and the lower layer 18, the surface strength at the skin side surface 3 is high, and in a wet state including a liquid, The tear does not easily occur. In order to maintain this surface strength, it is preferable that the 1st nonwoven fabric 15 contains 20 mass% or more of synthetic resin fibers.

In the first embodiment, the second nonwoven fabric 16 is formed only of cellulose fibers. Since the second nonwoven fabric 16 mainly consists of cellulose fibers, the hydrophilicity is higher than that of the lower layer 18, and the liquid drawn into the lower layer 18 from the upper layer 17 of the first nonwoven fabric 15 is In addition, the second nonwoven fabric 16 is quickly attracted and held. However, the hydrophilic synthetic resin fiber may be contained in the 2nd nonwoven fabric 16 in the range in which the whole rigidity does not become high.

The back sheet 12 may be formed of a polyethylene film or a composite nonwoven fabric in which a spun bond nonwoven fabric S and a meltblown nonwoven fabric M are laminated in the order of S / M / S. In addition, as for the back sheet 12, what is preferably breathable is used. As for the back seat | sheet 12, in order to make the ductility of the panty liner 1 whole into the said numerical range, a soft thing is used, Preferably the said polyethylene film is used. The unit weight of this film is about 10-40 g / m <2>. Also preferably, a stretchable film is used as the back sheet 12. This stretchable film is formed by co-extrusion of two layers of LDPE (low density polyethylene) and an alpha olefin resin. When the elastic film is used, when the panty liner 1 is adhered to the inner surface of the crotch portion of the underwear, it is easy to deform according to the stretching of the crotch portion of the underwear.

The second nonwoven fabric 16 and the back sheet 12 are bonded by a hot melt adhesive. In order not to impair the flexibility of the pantiliner 1, the coating amount of the hot melt adhesive is preferably 5 to 30 g / m 2.

The pressure-sensitive adhesive layer 13 is formed in a stripe shape so as to extend in parallel in the longitudinal direction on the surface of the back sheet 12. The pressure sensitive adhesive layer 13 is formed of a rubber pressure sensitive hot melt adhesive. In this embodiment, the width dimension of one said pressure sensitive adhesive layer 13 is 4 mm, and 20 pressure sensitive adhesive layers 13 are provided in parallel. The unit weight of the sum total of a pressure sensitive adhesive is 33 g / m <2>. However, the formation pattern of the pressure sensitive adhesive layer 13 is not limited to the said form, For example, it may be a stripe pattern extended in a horizontal direction, etc., and may be apply | coated on the front surface of the back sheet 12. However, when the back sheet 12 is air permeable, it is preferable that it is patterned like a stripe so that air permeability may not be impaired.

As for the release sheet 20, a release coating agent such as silicon is coated on the surface of a paper material such as glassine paper or the like is used.

4 is a cross-sectional view showing the pantiliner 30 of the second embodiment of the present invention, and FIG. 5 is an enlarged cross-sectional view showing a part thereof.

The shape of the pantiliner 30 of 2nd Embodiment is the same as that of 1st Embodiment shown in FIG. 1, and the back sheet 12, the pressure-sensitive adhesive layer 13, the release sheet 20, etc. are also 1st Embodiment. Is used.

As shown in FIG. 4 and FIG. 5, the main-body part 40 of the panty liner 30 is comprised from the liquid holding sheet 31 formed from one nonwoven fabric, the back sheet 12, and the pressure-sensitive adhesive layer 13 It is.

The single nonwoven fabric which comprises the said liquid holding sheet 31 has a unit weight of 25-80 g / m <2>. The liquid holding sheet 31 is a two-layer spunlace nonwoven fabric, and the blending of fibers in the upper layer 32 and the lower layer 33 is different from each other. The manufacturing method of a 2-layer spunlace nonwoven fabric is the same as that of the 1st nonwoven fabric 15 in the said 1st Embodiment.

The one nonwoven fabric which comprises the liquid holding sheet 31 contains the cellulose fiber of 60 mass% or more. Moreover, it is preferable to contain 65 mass% or more of said cellulose fibers, More preferably, it is 70 mass% or more. However, the upper layer 32 contains 20% or more of synthetic resin fibers of the mass of the upper layer 32, and the surface strength of the skin side surface 3 is increased.

The lower layer 33 is formed of only cellulose fibers. Alternatively, the lower layer 33 may be formed of the cellulose fiber and the durable hydrophilic synthetic resin fiber. By including the synthetic resin fibers in the lower layer 33, voids can be maintained between the fibers in the lower layer 33, and the holding capacity of the liquid can be increased.

By including the hydrophobic synthetic resin fibers in the upper layer 32, the hydrophilicity of the lower layer 33 is higher than the upper layer 32, the liquid imparted to the liquid holding sheet 31 from the skin side surface 3 is lower layer 33 By the hydrophilic force of, the upper layer 32 is quickly penetrated and attracted to the lower layer 33, whereby the liquid is retained in the lower layer 33. In addition, by including the hydrophobic synthetic resin fibers in the upper layer 32, the liquid absorbed and held in the lower layer 33 is not easily returned to the skin side surface of the holding sheet 31.

The pantiliner 30 has a thickness of 1.2 mm or less, preferably 1.0 mm or less in a state where the back sheet 12 is superposed on the liquid holding sheet 31. The nonwoven fabric which comprises the said liquid holding sheet 31 does not contain a binder, and fiber does not fuse. The longitudinal stiffness measured by the cantilever method with the back sheet 12 superimposed on the liquid holding sheet 31 is in the range of 40 to 110 mm per 20 mm width, and the compression recovery at the time of compression in the thickness direction The castle is 40-55%.

The panty liners 1 and 30 of the above-described embodiments have liquid retaining sheets 11 and 31 formed of nonwoven fabrics whose main body portions 10 and 40 have a liquid absorbing ability and retaining ability, a back sheet 12 and It consists of the pressure-sensitive adhesive 13. Therefore, it can be comprised thin and the whole can be comprised softly.

When the degree of stiffness is within the above numerical range, the panty liners 1 and 30 are attached to the inner surface of the crotch portion of the underwear through the pressure-sensitive adhesive layer 13 so that the panty liners can be deformed according to the deformation of the underwear. Will not easily feel discomfort in the groin. With the lecture degree, a texture equivalent to a part of the underwear can be obtained with the panty liners 1 and 30 mounted. Moreover, since the stiffness is 40 mm or more, it is easy to maintain the shape of the panty liners 1 and 30, for example, when the release sheet 20 is peeled off and the center portion is held by a finger to adhere to the crotch portion of the underwear. The front edge 1a and the rear edge 1b do not bend much larger than 80 degrees. Therefore, it is possible to prevent the problem that the back sheets 12 are bonded to each other through the pressure sensitive adhesive layer 13, and the panty liners 1 and 30 can be reliably adhered to the inner surface of the crotch portion of the underwear.

When the compressive recovery property is within the above numerical range, when the liquid holding sheets 11 and 31 are locally pressed on the skin side surface, the phenomenon that the periphery is elastically returned and a recessed portion of the pressed portion is not easily generated. . Therefore, even if it is pressed locally by the tip of a nail, the shape of the whole does not change significantly.

As illustrated in FIG. 6, the panty liners 1 and 30 are additionally wrapped in the release sheet 20 with the release sheet 20 adhered to the release sheet 20 so that the whole is a 3-ply state or a 2-ply. Packaged in a folded state. If this package state continues for a long time, the local compressive force continues to act on the liquid retaining sheets 11 and 31 in the portion of the fold line. However, if the compression recovery is within the above numerical range, when the package is opened and the panty liners 1 and 30 are unfolded, a large recessed portion is not easily left in the folded line, and the fibers of the nonwoven fabric are relatively free. Therefore, the phenomenon that the fiber concentrates and aggregates at the point where it was the folded line does not easily occur.

Therefore, the flatness of the skin side surface 3 can be maintained at the time of use, and it does not give discomfort easily to vagina or its surroundings.

In addition, the present invention is not limited to the above embodiment, but is softened by interposing a large number of embossed portions on the skin-side surfaces of the liquid holding sheets 11 and 31, and the stiffness and compression recovery are in the above numerical range. It may be adjusted to be.

 (1) Example and Comparative Example

Each Example and the comparative example shown in Table 1 adhere | attach the resin film which comprises a back sheet to the nonwoven fabric which comprises a liquid holding sheet so that it may become the same conditions as what comprises a panty liner. In addition, the thickness of the state in which the liquid holding sheet and the back sheet were bonded together was measured, and the stiffness was measured by the cantilever method. The characteristics during compression were measured using a KES tester, and the results are shown in Table 1.

(Example 1)

2 to 3, the liquid retaining sheet is an embodiment in which the first nonwoven fabric and the second nonwoven fabric are composed.

The first nonwoven fabric is a two-layer spunlace nonwoven fabric produced by water jet treatment. The upper layer is formed of an upper fibrous web of 70 mass% of cotton (Co) and 30 mass% of weakly hydrophilic PET, and has a unit weight of 15 g / m 2, and the lower layer is 60 mass% of rayon fiber and durable hydrophilic PET. Is 40 mass% and a unit weight is 20 g / m <2>. The total unit weight of the first nonwoven fabric is 35 g / m 2. The first nonwoven fabric produced an energy of water jet treatment as 1.2 (kw / m 2).

The second nonwoven fabric was a spunlace nonwoven fabric formed from a fibrous web having a rayon fiber of 100% and a unit weight of 25 g / m 2, and produced an energy of waterjet treatment as 0.48 (kw / m 2).

The blending ratio of the cellulose fibers in the first nonwoven fabric is 64% by mass, and the blending ratio of the cellulose fibers in the entire liquid holding sheet composed of the first nonwoven fabric and the second nonwoven fabric is 79% by mass.

As the back sheet, a non-permeable polyethylene resin film having a unit weight of 23 g / m 2 was used.

The first nonwoven fabric and the second nonwoven fabric were bonded with a hot melt adhesive applied in a spiral form, and the adhesive was applied at a unit weight of 10 g / m 2. The second nonwoven fabric and the back sheet were also bonded with the same unit weight hot melt adhesive.

The thickness was 0.6 mm. The stiffness was 93 mm in the flow direction MD of the web at the time of manufacturing the nonwoven fabric and 47 mm in the direction CD orthogonal to the flow direction. Compression recovery (RC) was 42.8%.

(Example 2)

Conditions other than the content described below are the same as Example 1. FIG.

The first nonwoven fabric is a spunlace nonwoven fabric having 60 mass% of cotton (Co), 40 mass% of weakly hydrophilic PET, and having a unit weight of 30 g / m 2. The second nonwoven is a spunlace nonwoven formed from a fibrous web of 100% rayon fiber and having a unit weight of 25 g / m 2.

The blending ratio of the cellulose fibers in the first nonwoven fabric is 60% by mass, and the blending ratio of the cellulose fibers in the whole liquid holding sheet composed of the first nonwoven fabric and the second nonwoven fabric is 78.2%.

As the back sheet, a non-permeable polyethylene resin film having a unit weight of 23 g / m 2 was used.

The thickness was 0.65 mm. The lecture degree was 95 mm in MD and 74 mm in CD. Compression recovery (RC) was 49.1%.

(Example 3)

The conditions other than the content described below are the same as in Example 1.

The first nonwoven fabric is a spunlace nonwoven fabric formed of a fibrous web having a cotton (Co) of 100% by mass and a unit weight of 37 g / m 2.

The second nonwoven fabric was a three layer spunlace nonwoven fabric, the upper layer was formed from a fibrous web of 60% by mass of rayon fiber, 20% by mass of hydrophilic PET, 20% by mass of hydrophilic PP, and having a unit weight of 18 g / m 2. The middle layer was formed from a fibrous web of 100% rayon fiber and having a unit weight of 10 g / m 2. The lower layer was formed from a fiber web having 60% by mass of rayon fiber, 20% by mass of hydrophilic PET, 20% by mass of hydrophilic PP, and having a unit weight of 10 g / m 2. The total unit weight of the second nonwoven fabric was 38 g / m 2.

The blending ratio of the cellulose fibers in the first nonwoven fabric is 100% by mass, and the blending ratio of the cellulose fibers in the whole liquid holding sheet composed of the first nonwoven fabric and the second nonwoven fabric is 85.3%.

As the back sheet, a non-permeable polyethylene resin film having a unit weight of 23 g / m 2 was used.

The thickness was 0.7 mm. The lecture degree was 107 mm in MD and 51 mm in CD. Compression recovery (RC) was 43.5%.

(Example 4)

As shown in FIG. 4 and FIG. 5, the liquid holding sheet was formed with one nonwoven fabric. The conditions other than the content described below are the same as in Example 1.

One nonwoven fabric which forms the liquid holding sheet is a two-layer spunlace nonwoven fabric. The upper layer is formed of an upper fibrous web having 30 mass% of cotton (Co), 70 mass% of weakly hydrophilic PET, and having a unit weight of 20 g / m 2, and the lower layer is 50 mass% of cotton and 50 mass% of rayon fiber. And a lower fiber web having a unit weight of 40 g / m 2. The total unit weight of the nonwoven fabric is 60 g / m 2.

The compounding ratio of the cellulose fiber in the said nonwoven fabric is 77 mass%.

As the back sheet, a non-permeable polyethylene resin film having a unit weight of 23 g / m 2 was used.

The thickness was 0.49 mm. The lecture degree was 76.5 mm in MD and 66 mm in CD. Compression recovery (RC) was 46.8%.

(Example 5)

As shown in FIG. 4 and FIG. 5, the liquid holding sheet was formed with one nonwoven fabric. The conditions other than the content described below are the same as in Example 1.

One nonwoven fabric for forming the liquid retaining sheet was formed of a fibrous web having 60 mass% of cotton (Co), 40 mass% of weakly hydrophilic PET, and having a unit weight of 60 g / m 2. The compounding ratio of the cellulose fiber in the said nonwoven fabric is 60 mass%.

As the back sheet, a non-permeable polyethylene resin film having a unit weight of 23 g / m 2 was used.

The thickness was 0.64 mm. The lecture degree was 79.5 mm in MD and 63 mm in CD. Compression recovery (RC) was 46.7%.

(Example 6)

2 to 3, the liquid retaining sheet is an embodiment in which the first nonwoven fabric and the second nonwoven fabric are composed. Conditions other than the content described below are the same as Example 1. FIG.

The first nonwoven fabric is a spunlace nonwoven fabric having 60 mass% of cotton (Co), 40 mass% of weakly hydrophilic PET, and having a unit weight of 60 g / m 2.

The second nonwoven fabric was a three layer spunlace nonwoven fabric, the upper layer was formed from a fibrous web of 60% by mass of rayon fiber, 20% by mass of hydrophilic PET, 20% by mass of hydrophilic PP, and having a unit weight of 18 g / m 2. The middle layer was formed from a fibrous web of 100% rayon fiber and having a unit weight of 10 g / m 2. The lower layer was formed from a fiber web having 60% by mass of rayon fiber, 20% by mass of hydrophilic PET, 20% by mass of hydrophilic PP, and having a unit weight of 10 g / m 2. The total unit weight of the second nonwoven fabric was 38 g / m 2. The sum of the unit weights of two nonwoven fabrics is 98 g / m <2>.

The blending ratio of the cellulose fibers in the first nonwoven fabric is 60% by mass, and the blending ratio of the cellulose fibers in the whole liquid holding sheet composed of the first nonwoven fabric and the second nonwoven fabric is 64.2%.

As the back sheet, a non-permeable polyethylene resin film having a unit weight of 23 g / m 2 was used.

The thickness was 1.02 mm. The lecture degree was 101 mm in MD and 72 mm in CD. Compression recovery (RC) was 47.8%.

(Comparative Example 1)

Conditions other than the content described below are the same as Example 1. FIG.

The first nonwoven fabric is a spunlace nonwoven fabric formed of a fibrous web having a cotton (Co) of 100% by mass and a unit weight of 35 g / m 2. The second nonwoven fabric was formed of a fiber web having a core portion of PET and a superstructured PE composite fiber 100% and having a unit weight of 35 g / m 2, using an air-through nonwoven fabric in which the composite fiber was fused with hot air. . The total unit weight of the first nonwoven fabric and the second nonwoven fabric is 70 g / m 2.

The blending ratio of the cellulose fibers in the first nonwoven fabric is 100 mass%, and the blending ratio of the cellulose fibers in the whole liquid holding sheet composed of the first nonwoven fabric and the second nonwoven fabric is 50 mass%.

As the back sheet, a moisture-permeable polyethylene resin film having a unit weight of 23 g / m 2 was used.

The thickness was 2.0 mm. The yield was 87 mm in MD, and the compression recovery rate (RC) was 60.1%.

(Comparative Example 2)

Conditions other than the content described below are the same as Example 1. FIG.

The first nonwoven fabric was a three-layer spunlace nonwoven fabric, wherein the upper layer was formed of a fibrous web of 60 mass% of rayon fibers, 20 mass% of hydrophilic PET, 20 mass% of hydrophilic PP, and having a unit weight of 18 g / m 2. The middle layer was formed from a fibrous web with 100% rayon fibers and a unit weight of 10 g / m 2. The lower layer was formed of a fibrous web of 60% by mass of rayon fibers, 20% by mass of hydrophilic PET, 20% by mass of hydrophilic PP, and having a unit weight of 10 g / m 2. The total unit weight of the first nonwoven fabric was 38 g / m 2.

The second nonwoven fabric was formed of a fiber web having a core portion of 100% of a sheath type synthetic fiber having a PET part and a superpart PE, and having a unit weight of 25 g / m 2, using an air through nonwoven fabric in which the composite fiber was fused with hot air. . The total unit weight of the first nonwoven fabric and the second nonwoven fabric is 63 g / m 2.

The blending ratio of the cellulose fibers in the first nonwoven fabric is 71 mass%, and the blending ratio of the cellulose fibers in the whole liquid holding sheet composed of the first nonwoven fabric and the second nonwoven fabric is 42.8 mass%.

As the back sheet, a non-breathable polyethylene resin film having a unit weight of 23 g / m 2 was used.

The thickness was 1.5 mm. The stiffness was 90 mm in MD and the compression recovery rate (RC) was 56.2%.

(Comparative Example 3)

Conditions other than the content described below are the same as Example 1. FIG.

It is a comparative example using one nonwoven fabric as a liquid holding sheet. The nonwoven fabric was formed of a fibrous web of 87% by mass of hydrophilic PET, 13% by mass of rayon fibers, and having a unit weight of 75 g / m 2.

The compounding ratio of the cellulose fiber in a nonwoven fabric is 13 mass%.

As the back sheet, a moisture-permeable polyethylene resin film having a unit weight of 23 g / m 2 was used.

The thickness was 0.9 mm. The yield was 34 mm in MD, and the compression recovery rate (RC) was 40.3%.

(2) Measuring method (lecture degree by cantilever method)

It measured based on JIS-L1018 (45 degree cantilever method). The test bench 60 shown in FIG. 7 was used. The upper surface 61 of the test bench 60 is a horizontal plane, and the front thereof is an inclined surface 62 at an angle of 45 ° with respect to the horizontal plane. The test piece 63 is 20 mm in width dimension and about 140 mm in length in each of the said Example and a comparative example.

The test piece 63 is mounted on the upper surface 61, the scale is provided on the upper surface 61 in parallel with the test piece 63, and the front end 63a of the test piece 63 is the boundary between the upper surface 61 and the slope 62. In accordance with, the rear end 63b of the test piece 63 matches the reference scale of the scale 64.

In this state, the test piece 63 is slid in the inclined plane direction, and the movement amount of the rear end 63b when the tip 63a of the test piece 63 touches the inclined plane 62 is read by the scale 64. This reading was made into lecture degree (mm).

The measurement in MD in Table 1 was measured using the test piece 63 which made MD of an Example and a comparative example 140 mm in length, and the measurement in CD used the test piece which made CD of an example 140 mm in length. It is measured by. In addition, although the length did not satisfy 140 mm in the comparative example, it measured similarly to the Example except a length.

(Compression recovery)

The compression characteristic of the said Example and the comparative example was measured by the automated compression tester "KES FB-3A" manufactured by Karttech Corporation. The measurement diagram is shown in FIG.

The sample in which the liquid holding sheet and the back sheet are bonded to the automated compression tester is installed. The initial pressure of P0 = 49 Pa (0.5 g / cm <2>) is given to a sample perpendicularly from a skin side surface by the circular pressure plate of 2 cm <2>, and the measured thickness at this time is made into initial thickness T0. From the initial pressure P0 as a starting point, the compression pressure was linearly increased to a compression speed of 50 seconds / 1 mm up to Pm = 4900 Pa (50 g / cm 2), and the thickness at the time of pressurization of the measurement sample when the compression pressure Pm was applied. Let Tm be.

Compression work WC is the value (N * m / m <2>) which statically divided between T0 + Tm with WC = ∫P * dT (P is pressure, T is thickness) with respect to the curve of FIG. . Compression recovery work WC 'is the value (N * m / m <2>) which performed the same static fraction as the above with respect to the curve of (ii) at the time of returning compression pressure from Pm to P0. Compression recovery rate (RC) is obtained by WC '/ WC (%). However, in Table 1, since the average value of five sample measurements is set as the compression recovery rate (RC), in Table 1, RC value does not exactly correspond to WC '/ WC (%).

(3) sensory evaluation

The pantiliner of the shape shown in FIG. 1 was manufactured using the Example and comparative example shown in Table 1 above. The pantyliner had a longitudinal dimension of 137 mm, a minimum width of 47 mm, and a maximum width of 58 mm.

As shown in Table 2, Example 1 produced a sample in which the MD was oriented in the longitudinal direction and a sample in which the CD was oriented in the longitudinal direction, and Example 2, Example 3, Example 4, Example 5, Example 6 produced a sample with the MD directed in the longitudinal direction.

Five women between 25 and 35 years old were put on the panty liners of each example and each of the comparative examples, `` softness of the product (evaluated soft feeling ○) '' `` uncomfortable feeling during wearing (feeling uncomfortable) Sensory evaluation was performed on the following items, where the evaluation was ○) '' "The presence of the panty liner during mounting (evaluation that does not feel the presence ○)" "Ease of attachment to the underwear (Evaluation that it is easy to attach ○)" received.

As for the criterion of evaluation, the evaluation that the evaluation was excellent as described above was indicated by "(circle)" and the evaluation which was not good by "x". The evaluation results are shown in Table 2.

The panty liner of the present invention is easily susceptible to deformation of the crotch portion of the undergarment made of cloth, and does not give a sense of discomfort to the crotch portion, and obtains a contact feeling such as part of the crotch portion and a part of the crotch portion.

1 is a plan view showing the panty liner of the first embodiment of the present invention.

2 is a cross-sectional view taken along the line II-II of FIG. 1.

3 is an enlarged cross-sectional view of the panty liner of the first embodiment.

4 is a cross-sectional view showing the pantiliner of the second embodiment of the present invention.

5 is an enlarged cross-sectional view of the pantiliner of the second embodiment;

6 is a perspective view showing a state in which the panty liner is folded;

7 is an explanatory diagram of a measuring method of lecture degree.

8 is an explanatory diagram of compression characteristics for obtaining compression recovery;

<Explanation of symbols for main parts of drawing>

1: panty liner

3: skin side surface

4: wearing side surface

10: main body

11: liquid retention sheet

12: back sheet

13: pressure sensitive adhesive layer

15: the first nonwoven fabric

16: second nonwoven fabric

17: upper floor

18: lower layer

31: liquid retention sheet

32: upper floor

33: lower layer

Claims (8)

In the pantyliner having a vertically long shape having a liquid holding sheet and a back sheet superimposed on the wearing side of the liquid holding sheet, the length dimension in the vertical direction being longer than the width dimension in the horizontal direction, The liquid retaining sheet is formed of one or more nonwoven fabrics, and contains 60% by mass or more of cellulose fibers, and the nonwoven fabric is formed by entanglement without adhering the fibers to each other, and the liquid retaining sheet and the back sheet. Is in a bonded state, and the degree of lecture by the cantilever method in the longitudinal direction is 40 to 110 mm per 20 mm width. The panty liner according to claim 1, wherein the compression recovery in the thickness direction is 40 to 55%. The liquid-retaining sheet according to claim 1 or 2, wherein the liquid-retaining sheet is composed of two nonwoven fabrics bonded to each other, and the blending of fibers is different from the first nonwoven fabric appearing on the skin side surface and the second nonwoven fabric positioned on the wear side. And the first nonwoven fabric and the second nonwoven fabric each contain 30% by mass or more of cellulose fibers, and the two nonwoven fabrics contain 60% by mass or more of cellulose fibers. The panty liner according to claim 3, wherein both the first nonwoven fabric and the second nonwoven fabric have a unit weight of 20 to 70 g / m 2. The liquid-retaining sheet according to claim 1 or 2, wherein the liquid-retaining sheet is formed of one nonwoven fabric, and the nonwoven fabric is different in blending of fibers in an upper layer appearing on the skin side surface and a lower layer appearing on the wear side surface. A panty liner in which both the upper layer and the lower layer contain 30% by mass or more of cellulose fibers, and 60% by mass or more of cellulose fibers are included in the entire nonwoven fabric. The panty liner according to claim 5, wherein a unit weight of the one nonwoven fabric constituting the liquid holding sheet is 25 to 80 g / m 2. The panty liner according to claim 1 or 2, wherein the plinthliner has a thickness dimension of 1.2 mm or less in a state where the liquid holding sheet and the back sheet overlap and are bonded to each other. The panty liner according to claim 1 or 2, which is folded and packaged.