JPH0524025U - Sanitary napkin - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the above-mentioned displacement of the absorbent body and prevent drainage of menstrual blood. [Structure] An upper layer portion UP in which at least the use surface side is liquid permeable and the upper absorbent body 2 is wrapped inside, and a lower layer portion U in which at least the use surface side is liquid permeable and the lower absorbent body 4 is wrapped inside.
N and, the upper layer portion UP is narrower than the lower layer portion UN, and the upper layer portion UP is located in the middle of the lower layer portion UN,
In the napkin in which the front and rear ends of the upper layer portion are integrated with the front and rear ends of the lower layer portion, the upper layer portion UP is fixed to the lower layer portion UN not only at the front and rear ends that are integrated with the lower layer portion UN of the upper layer portion UP but also in the longitudinal middle.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sanitary napkin having an upper layer portion and a lower layer portion.

[0002]

[Prior Art]

 After the sanitary napkin is attached to the shorts, the position of the sanitary napkin often shifts laterally according to the movement of the wearer. When the position of the napkin shifts in this way, the napkin absorber corresponding to the local area becomes insufficient, resulting in excessive drainage and side leakage.

In order to prevent this deviation, the napkin described in JP-A-58-36552 has a composite structure in which an upper layer portion and a lower layer portion are laminated, and the width of the lower layer portion is smaller than the width of the upper layer portion. That is, by forming a convex portion by the upper layer portion in the widthwise middle of the lower layer portion, the upper layer portion is made to bite into the crotch gap, and it is attempted to prevent lateral displacement. is suggesting.

[0004]

[Problems to be solved by the device]

 By the way, when the napkin is worn, the front and rear parts thereof are bent inward, so that the napkin is used in close contact with the wearer's lower abdominal side and hip side. Since the absorbent body is generally formed of a semi-rigid material such as cotton pulp from the viewpoint of the drainage absorption capacity and the liquid retention capacity, the upper and lower layers are formed like the napkin described in the above publication. If the upper and lower parts are integrated only at the front and rear ends, the followability to the crotch cut of the upper part is surely excellent, but if vigorous exercise is involved, the longitudinal middle part of the lower part is laterally displaced. In some extreme cases, only the upper layer part is in contact with the local part, or only one side part of the upper layer part and the lower layer part is in contact.

In this case, when the side leakage occurs from the side edge of the upper layer portion, the side leakage is likely to occur directly or through the one side portion whose absorption area is reduced.

[0006] Therefore, an object of the present invention is to make a structure which, while taking advantage of the two-layer structure, does not cause lateral leakage even during intense motion.

[0007]

[Means for Solving the Problems]

 The above problem has at least an upper layer portion that is liquid permeable on the side of use and has an upper absorbent body inside, and a lower layer portion that is liquid permeable on at least the side of use and has a lower absorbent inside. In the napkin in which the upper layer portion is narrower than the lower layer portion, the upper layer portion is located in the middle of the lower layer portion, and the front and rear ends of the upper layer portion are integrated with the front and rear ends of the lower layer portion, with respect to the lower layer portion of the upper layer portion, Even in the middle of the longitudinal direction other than the front and rear ends of the integration, the problem can be solved by fixing the upper layer portion to the lower layer portion.

[0008]

[Action]

 In the present invention, as in the conventional example, since the upper layer portion and the lower layer portion have a two-layer structure, when the napkin is curved on the abdominal side and the back side, the upper layer portion has a good shape with respect to the crotch portion. To follow. Even if the lower layer portion laterally shifts due to exercise, the upper layer portion digs into the groove of the crotch portion, which provides excellent fit and prevents lateral leakage of menstrual blood.

Further, according to the present invention, the upper layer portion is fixed to the lower layer portion not only at the front and rear ends of the upper layer portion which are integrated with the lower layer portion but also in the middle in the longitudinal direction. As a result, even if a lateral displacement force acts on the lower layer portion during vigorous exercise, this lower layer portion does not move to the upper layer portion even if it is in the middle in the longitudinal direction other than the integrated front and rear ends. Since it is fixed to the lower layer, no lateral displacement occurs. As a result, the lower layer portion can be always positioned outward in the width direction from both sides of the upper layer portion, and even if lateral leakage occurs from the side edge of the upper layer portion, menstrual blood can be absorbed in the lower layer portion.

[0010]

EXAMPLES Next, the present invention will be described in detail with reference to Examples. 1 is a plan view of the sanitary napkin of the present invention, FIG. 2 is a view taken along the line 2-2, and FIG. 3 is a view taken along the line 3-3. Reference numeral 1 is an upper layer liquid-permeable sheet made of a so-called mesh sheet in which a large number of holes are formed in a non-woven fabric or a plastic sheet such as polyethylene. An upper absorbent body mainly composed of an absorbent body 2A made of cotton-like pulp and a bellows-shaped nonwoven fabric 2B. Wraps two. The bellows-like non-woven fabric 2B is provided to give a cushioning property to the contact surface, and only the bottom of the wave is fixed to the crepe paper 2C. The crepe paper 2C is formed by hot-melting the absorber body 2A. It is fixed by the hot melt adhesive 3 to the crepe paper 2D that is fixedly wrapped via the adhesive 3. Each of the above materials constitutes the upper layer portion UP according to the present invention.

The bellows-like non-woven fabric 2B is a hydrophobic fiber, which has a heat-melting property such as ES fiber (a polypropylene fiber is coated with polyethylene around it) or ET fiber (a polyester fiber is wrapped around with a polyethylene fiber). Coated products) can be preferably used.

On the other hand, the lower layer portion UN portion includes a lower absorbent body 4 composed of an absorbent body 4A and crepe paper 4B, and a lower liquid permeable sheet 5 and a back sheet 6 that wrap around the lower absorbent body 4. It is composed by. The absorber main body 4 is for absorbing leaked menstrual blood from the upper layer portion UP, and as the absorption capacity, the upper layer portion UP is the main and the lower layer portion UN is the secondary, and from the viewpoint of fitability, the upper portion. It is preferably 1/10 to 1/1 of the thickness of the absorber 2. As the absorbent body 4A, for example, a one-layer body or a laminated body of crepe paper or pulp nonwoven fabric can be used. The width may be the full width, but as shown in the figure, it is preferable that the width is substantially the same as the upper layer portion UP. When the width of the absorbent body 4A is not full width, it is preferable that the crepe paper 4B extends over almost the entire width. The crepe paper 4B can be replaced with a pulp nonwoven fabric. As a mode of wrapping the lower absorbent body 4, in order to prevent the bonding line from being exposed on the upper surface, the lower absorbent body 4 can be frame-wound under the lower liquid-permeable sheet 5 and bonded to the crepe paper 4B and the hot melt adhesive 3. The back sheet 6 can be joined to both sides of the lower liquid-permeable sheet 5 by the hot melt adhesive 3. As the back sheet 6, a plastic sheet or a so-called poly-laminated nonwoven fabric can be used. The lower layer liquid-permeable sheet 5 may be the mesh sheet described above, but since it does not directly permeate menstrual blood, a general nonwoven fabric is sufficient. In this respect, it is preferable to use a mesh sheet as the upper layer liquid-permeable sheet 1 that allows the menstrual blood to directly permeate, in view of the reversibility of menstrual blood. On the other hand, the upper layer portion UP is narrower than the lower layer portion UN, the upper layer portion UP is located in the middle of the lower layer portion UN, and the front and rear ends of the upper layer portion UN are connected to the front and rear ends of the lower layer portion UN by hot melt adhesive or It is integrated by heat sealing.

In particular, in the present invention, the upper layer portion UP is fixed to the lower layer portion UN by the hot-melt adhesive 10 or the like not only at the front and rear ends integrated with the lower layer portion UN of the upper layer portion UP, but also in the middle in the longitudinal direction. ..

Reference numeral 8 denotes a hot-melt adhesive for preventing slippage, which is covered with a release paper 9, and when used, the release paper 9 is peeled off and fixed to the shorts.

When the skin and the shorts are displaced due to the exercise, and in the case of a normal one-piece integrated napkin, it is unavoidable that the napkin is displaced due to the displacement of the shorts. On the other hand, according to the napkin having the above structure, even if the lower layer portion UN is displaced, the upper layer portion UP is free from the front and rear ends and the portion fixed by the hot melt adhesive 10 with respect to the lower layer portion UN. Therefore, the upper layer portion UP can be kept in contact with the crotch portion without immediately following the movement of the lower layer portion UN. Also, in the case of intense exercise, the amount of deviation tends to increase, but with respect to the deviation of the lower layer portion UN, the upper layer portion UP that is in contact with the crotch portion has the fixed portion, so that the lower layer portion UN It acts to prevent slippage and, as a result, prevents lateral displacement in particular. As a result, it is highly effective in preventing side leakage.

The length S, width d, and arrangement of the fixed portion 10 are as shown in FIG. 1, the length L of the free portion between the front and rear ends, and the distance between the center of the fixed portion 10 and the front and rear ends. When P and Q are taken, S / L = 0.02 to 0.8 mm, especially 0.10 to 0.4 mm, d = 1 to 4 mm, especially 4 to 10 mm, L = 100 to 350 mm, especially 150 to 270 mm, P / Q = 0.1 .About.1.5, particularly 0.3 to 1.0 is preferable. Furthermore, (width of upper layer portion) / (width of lower layer portion) is preferably 0.15 to 0.9, and particularly 0.3 to 0.6. Note that S may be discontinuous. It may also be divided.

[0017]

[Effect of the device]

 As described above, according to the present invention, it is possible to prevent the leakage of drainage such as menstrual blood, with almost no displacement of the absorber.

[Brief description of drawings]

FIG. 1 is a plan view of a sanitary napkin according to the present invention.

FIG. 2 is a view taken along the line 2-2 of FIG.

FIG. 3 is a view taken along the line 3-3 of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Upper layer liquid permeable sheet, 2 ... Upper absorber, 4 ... Lower absorber, Lower layer liquid permeable sheet, 6 ... Back sheet, 10 ... Hot melt adhesive (fixed part), UP ... Upper layer part, UN ...
Lower layer part.

Claims (1)

[Scope of utility model registration request] 1. An upper layer portion having liquid permeability on at least the use surface side and enclosing an upper absorbent body inside, and a lower layer portion having liquid permeability on at least the use surface side and enclosing a lower absorbent body inside, In a napkin in which the upper layer portion is narrower than the lower layer portion, the upper layer portion is located in the middle of the lower layer portion, and the front and rear ends of the upper layer portion are integrated with the front and rear ends of the lower layer portion, the upper layer portion is integrated with the lower layer portion. A sanitary napkin characterized in that the upper layer portion is fixed to the lower layer portion not only at the front and rear ends but also at the middle in the longitudinal direction.