KR101445867B1 - Absorbent article comprising a cover sheet with discriminative patterns and a method of forming patterns on a cover sheet - Google Patents

Abstract

The present invention relates to an absorbent product having a cover sheet capable of giving a wearer a sense of crush and aesthetics because the light reflectance of the pattern or the pattern periphery is higher than that of other portions without pattern, so that the pattern is clearly recognized. The absorbent article of the present invention is an absorbent article comprising a cover sheet disposed on the body side, a back sheet disposed on the opposite side thereof, and an absorbent pad disposed between the cover sheet and the back sheet, And the light reflectance of the surface of the cover sheet on which the pattern is formed is higher than the light reflectance of the other surface of the cover sheet. According to the above configuration, the pattern can be clearly recognized to the wearer, and the sense of beauty and appeal of the cover sheet of the wearer can be increased.

Absorbent article, cover sheet, liquid permeable sheet, pattern, light reflectance, smoothness

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article having a cover sheet formed with a clear pattern and a method for forming a pattern on a cover sheet. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

1 is a plan view of a conventional absorbent article.

2 is a cross-sectional view taken along a line II-II in Fig.

3 is a plan view of a cover sheet for an absorbent article according to the first embodiment of the present invention.

4 is a sectional view taken along the line IV-IV in Fig.

5 is a plan view of a cover sheet for an absorbent article according to a second embodiment of the present invention.

6 is a cross-sectional view taken along a line VI-VI in Fig.

7 is a plan view showing another example of a cover sheet for an absorbent article according to a second embodiment of the present invention.

8 is a plan view of a cover sheet for an absorbent article according to a third embodiment of the present invention.

9 is a cross-sectional view taken along line IX-IX of Fig.

Figs. 10A to 11D are diagrams showing another example of the pattern applied to the cover sheet, respectively. Fig.

12 is a sectional view of a cover sheet for an absorbent article according to a fourth embodiment of the present invention.

13 is a sectional view showing a roll for forming a pattern on a cover sheet for an absorbent article of the present invention.

14 is an enlarged view of a portion A in Fig.

Fig. 15 is a perspective view showing the roll of Fig. 13;

16 is a sectional view showing another structure of a roll for forming a pattern on a cover sheet for an absorbent article of the present invention.

17 is an enlarged view of a portion B in Fig.

Fig. 18 is a perspective view showing the roll of Fig. 16;

Fig. 19 is a cross-sectional view showing a modified example of the roll of Fig. 16;

20 is a cross-sectional view showing another structure of a roll for forming a pattern on a cover sheet for an absorbent article of the present invention.

21 is an enlarged view of a portion C in Fig.

22 is a cross-sectional view showing the structure of a roll for forming a pattern on a cover sheet while incorporating the nonwoven fabric sheet.

23 is an enlarged view of a portion D in Fig.

24 is a top view of the absorbent article of the present invention.

25 is a cross-sectional view taken along line XXV-XXV in Fig.

Description of the Related Art

100, 200, 300, 400: cover sheet 100a, 200a, 300a:

111, 211, 311: pattern 112, 212, 312: surface part

113: pattern bottom surface 213: border area

313: dot pattern 420: nonwoven sheet

500, 600, 700: roll 510, 610: first roll

511: Embossed portion 511a: Embossed surface

520: second roll 530, 630, 730: perforated film

531, 631, 731: engraved portion 611: first embossed portion

611a: first embossed surface 612: second embossed part

612a: second embossed surface 633: impression portion

720: second roll 721: pin

733: Spotted portion 800: Absorbent product

810: cover sheet 820: rear sheet

830: Absorption pad

The present invention relates to an absorbent article, and more particularly, to an absorbent article having an absorbent article having a cover sheet which can recognize a pattern clearly and has a good feel and aesthetics to a wearer because the light reflectance of a pattern or a pattern circumference is higher than other parts Product. The present invention also relates to a method of forming a pattern on such a cover sheet.

(Hereinafter referred to as " absorbent article ") absorbing and retaining the waste from the wearer such as sanitary napkin, panty liner, disposable diaper, urinary incontinence pad, etc. are widely known in the field of personal hygiene. One example of a sanitary napkin as one of such absorbent products is shown in Figs. 1 and 2. Fig. 1 and 2, the absorbent article 10 generally includes a liquid-pervious cover sheet 11 in contact with the wearer's body, a liquid-impervious back sheet 12 in contact with the wearer's garment, And an absorbent pad (13) disposed between the back sheet (11) and the back sheet (12). The cover sheet 11 seals the wearer ' s effluent into the absorbent pad 13 and the back sheet 12 absorbs the absorbent pad 13 to prevent the retained effluent from seeping and contaminating the wearer ' s garment.

The cover sheet 11 is made of a material having hydrophilicity and porosity, for example, a nonwoven fabric material or a perforated film. The cover sheet 11 shown in Figs. 1 and 2 is made of a perforated film.

The perforated film constituting the cover sheet 11 is produced by vacuum-piercing a film made of polyethylene. The film is recrystallized by heat applied to the film during the vacuum piercing, air flow by heat, and stretching by heat or the like, and gloss is formed on the surface of the film. Conventionally, such a glossy perforated film is used as a cover sheet, so that the wearer has a negative feeling that the glossy cover sheet is made of plastic and thinks that a substance such as plastic comes into contact with his / There is a problem that the product has a feeling of rejection.

In order to solve such a problem, there have been proposed a technique of embossing fine patterns on a perforated film, corona treating the surface of the perforated film, or bonding non-woven fibers to the surface of the perforated film. However, even if the cover sheet is further processed by these techniques, the feeling of the wearer can not be reduced and there is still a problem in that the absorbent article can not be favored.

The present invention has been made to solve the above problems, and it is an object of the present invention to provide an image forming apparatus and a method of manufacturing the same, which are capable of reducing the sense of rejection of a wearer, It is an object of the present invention to provide a cover sheet and an absorbent product having the cover sheet.

Another object of the present invention is to provide a method for forming a pattern on a cover sheet with a high light reflectance around a pattern or a pattern.

In order to achieve the above object and other objects, the absorbent article of the present invention comprises a cover sheet disposed on the body side, a back sheet disposed on the side opposite to the body sheet, and an absorbent pad Wherein the cover sheet has a plurality of patterns formed on the surface by thermocompression bonding and the light reflectance of the surface of the cover sheet on which the pattern is formed is higher than the light reflectance of the other surface of the cover sheet.

It is preferable that the ratio of the total area of the cover sheet to the area of the patterned surface is 1: 0.1 to 1: 0.7.

The absorbent article of the present invention is an absorbent article comprising a cover sheet disposed on the body side, a back sheet disposed on the opposite side thereof, and an absorbent pad disposed between the cover sheet and the back sheet, Wherein the light reflection rate of the surface on which the edge area is formed is higher than the light reflection rate of the surface of the cover sheet on which the edge area is not formed and the surface of the cover sheet on which the edge area is not formed.

It is preferable that the ratio of the total area of the cover sheet to the area of the surface on which the rim area is formed is 1: 0.1 to 1: 0.7. Further, the light reflectance of the surface of the cover sheet on which the pattern is formed may be higher than the light reflectance of the surface of the cover sheet on which the pattern and the border area are not formed.

In the absorbent article, the cover sheet is a nonwoven fabric selected from the group consisting of SBW, TBCW, TABCW and SPUNLACE.

The absorbent article further comprises a nonwoven sheet bonded to the cover sheet and formed of SBW, TBCW or TABCW.

A method for forming a pattern on a cover sheet of an absorbent product according to the present invention is a method for forming a pattern on a cover sheet disposed on a body side of an absorbent product, comprising the steps of: forming a cover sheet; Moving the cover sheet between a first roll having an embossed portion of the first roll and a second roll disposed at a predetermined distance from the first roll and moving the cover sheet between the first roll and the second roll, And the light reflectance of the surface of the cover sheet formed by the embossing portion of the first roll is higher than the light reflectance of the surface of the cover sheet on which the pattern is not formed.

A method for forming a pattern on a cover sheet of an absorbent product according to the present invention is a method for forming a pattern on a cover sheet disposed on the body side of the absorbent article, comprising the steps of: forming a cover sheet; Moving the cover sheet between a first roll having a first embossed portion of the first embossed portion and a second embossed portion formed around the first embossed portion and a second roll disposed at a predetermined distance from the first roll, Wherein the cover sheet is pressed by the first roll and the second roll in accordance with the rotation of the second roll, wherein the light reflectance of the cover sheet surface formed by the second embossing portion of the first roll is not patterned Is higher than the light reflectance of the surface of the cover sheet.

The temperature of the surfaces of the first roll and the second roll in the step of pressing the cover sheet is between the softening point and the melting point of the cover sheet and the cover sheet is pressed between the embossed portion of the first roll and the surface of the second roll, A pattern is formed on the surface.

The second roll has a plurality of fins having flat end faces on the surface, and in the step of pressing the cover sheet by the first roll and the second roll, a pattern and a dot pattern in the pattern are formed on the surface of the cover sheet.

In the step of forming the cover sheet, a nonwoven fabric sheet composed of TBCW or TABCW is disposed on one surface of the cover sheet, the second roll has a plurality of pins having flat end surfaces on the surface, A pattern is formed on the surface of the cover sheet and the nonwoven fabric sheet is bonded to the cover sheet.

It is preferable that the gloss of the surface of the cover sheet on which the pattern or dot pattern is formed is higher than 0.3 GP.

In the following, the present invention will be described in detail with reference to embodiments of the attached drawings. First, the cover sheet used in the absorbent product of the present invention will be described with reference to Figs. 3 to 12. Fig.

Fig. 3 is a plan view of a cover sheet for an absorbent article according to a first embodiment of the present invention, and Fig. 4 is a sectional view taken along the line IV-IV in Fig.

The cover sheet 100 for an absorbent article is a liquid-pervious sheet disposed on the side of the absorbent article which is in contact with the body. The illustrated cover sheet 100 is a cover sheet used in a sanitary napkin of an example of an absorbent product. The cover sheet 100 functions to move the discharge such as menses or urine of the wearer. The cover sheet 100 is formed of a film in which the perforations 100a are formed.

The surface of the cover sheet 100 is engraved on the surface of the cover sheet 100 to provide a sense of beauty and appeal to the wearer. The pattern is a clover and a circular pattern as shown. Specifically, the cover sheet 100 has a plurality of patterns 111 on its surface. The pattern 111 is uniformly formed on the entire surface of the cover sheet 100. The pattern (111) has a bottom surface (113). The light reflectance of the bottom surface 113 is higher than the light reflectance of the surface 112 excluding the pattern 111 of the cover sheet 100. [ Therefore, since the bottom surface 113 shines more than the other surface of the cover sheet 100 (i.e., the surface without the pattern 111) and the bottom surface 113 constitutes the pattern 111, The pattern 111 shines noticeably. As a result, the wearer perceives a higher gloss pattern 111 as compared with the gloss of the cover sheet 100, so that the wearer can have a sense of aesthetics and appeal instead of having a negative feeling on the cover sheet 100.

The pattern 111 is formed by thermocompression bonding the material forming the cover sheet 100, that is, the perforated film. The engraved portion of the perforated film is thermally deformed by thermocompression and the surface of the deformed portion is smoother than the surface of the other portion (that is, the surface 112 of the cover sheet 100 excluding the pattern 111) Or high flatness and high reflectance.

It is preferable that the film constituting the perforated film is crystallized as low as possible so that the portion where the light reflectance is relatively increased is recognized prominently. These films are mainly made of polyethylene and a filler of titanium oxide (TiO ₂ ) is added to lower the gloss. As the polyethylene, low density polyethylene, linear low density polyethylene or high density polyethylene may be used singly or in combination. Preferably, the film containing low density polyethylene is glossy It is advantageous to lower the degree. The film of such a material is made into a perforated film by punching or vacuum punching.

After preparing the perforated film, the pattern 111 is engraved on the surface of the perforated film by passing the perforated film through a roll embossed in a shape corresponding to the pattern 111. At this time, the roll thermally presses the perforated film in a state in which the roll is heated to a temperature equal to or higher than the softening point of the material constituting the perforated film (that is, polyethylene) and below the melting point. As a result, the pattern 111 is formed on the surface of the perforated film passing the roll, and the film portion, which becomes the pattern 111, is deformed by heat and pressure. Such deformation is that the polyethylene constituting the film is recrystallized at a temperature higher than the softening point so that the smoothness of the surface of the thermally pressed portion of the film becomes higher than before the deformation.

FIG. 5 is a plan view of a cover sheet for an absorbent article according to a second embodiment of the present invention, and FIG. 6 is a sectional view taken along the line VI-VI in FIG.

The cover sheet 200 is made of a film in which a perforation 200a is formed as a liquid-permeable sheet. The cover sheet (200) has a plurality of patterns (211) on the surface thereof, which can give the wearer a sense of beauty and appeal. The cover sheet 200 also has a rim area 213 surrounding the pattern 211 on its surface.

The light reflectance of the edge area 213 is higher than the light reflectance of the surface of the cover sheet 200 except for the edge area 213. [ Specifically, the light reflectance of the rim area 213 is higher than the light reflectance of the surface of the pattern 211. Therefore, the edge 211 is brighter than the edge 212 of the cover sheet 213 except for the border area 213 and the pattern 211, so that the edge 211 surrounded by the border area 213 indirectly stands out. As a result, the wearer recognizes the pattern 211 that is distinguished by the higher-gloss edge area 213 compared to the gloss of the cover sheet 200, so that the wearer has a negative feeling for the cover sheet 200, You can have a good feeling.

This edge region 213 is provided with another embossed portion having a smoothness higher than the smoothness of the perforated film lower than the embossed portion height around the embossed portion of the roll forming the pattern 211, The surface of the film is thermally pressed to form a flat surface of the thermocompression-bonded perforated film.

7 is a plan view showing a modified example of the cover sheet of the second embodiment.

The pattern 211 and the rim area 213 of the cover sheet 200 are higher than the light reflectance of the surface of the cover sheet 200 excluding these portions. Therefore, both the pattern 211 and the rim area 213 are enhanced in the cover sheet 200. Another embossed portion is provided around the embossed portion of the roll forming the pattern 211 so that the surface of the embossed portion has a higher degree of smoothness than the smoothness of the apertured film and then the perforated film is thermocompression- Both the pattern 211 and the rim region 213 are formed with high light reflectance.

FIG. 8 is a plan view of a cover sheet for an absorbent article according to a third embodiment of the present invention, and FIG. 9 is a sectional view taken along line IX-IX of FIG.

The cover sheet 300 has a plurality of engraved patterns 311 on its surface. In addition, the cover sheet 300 has a plurality of dot patterns 313 in each pattern 311. The pattern 311 is uniformly formed on the entire surface of the cover sheet 300, and the dot pattern 313 is uniformly formed in each pattern 311. The shape of the dot pattern 313 may be rectangular or rhombic in addition to the circular shape as shown.

The light reflectance of the dot pattern 313 is higher than the light reflectance of the surface 312 excluding the dot pattern 311 of the cover sheet 300. [ Therefore, the dot pattern 313 is shiny than the other surface of the cover sheet 300 (i.e., the surface without the dot pattern 313). A plurality of dot patterns 313 are gathered to form the pattern 311 so that the wearer recognizes the pattern 311 through the dot pattern 313 having a gloss higher than the gloss of the cover sheet 300, ), But it can have a sense of beauty and appeal.

The dot pattern 313 is thermally squeezed between the embossed portion and the pin when the perforated film is moved between a roll embossed in the shape of the pattern 311 and a roll having a plurality of fins disposed thereon, . The smoothness of the surface of the embossed portion of the roll is higher than the smoothness of the apertured film and the dot pattern 313 having a high light reflectance is formed on the surface of the perforated film portion to be thermocompression bonded.

Figs. 10A to 11D show another example of the pattern applied to the cover sheet. Fig. Figs. 10A to 10D show the honeycomb-shaped pattern, and Figs. 11A to 11D show the pattern of the wave-shaped pattern. Only the bottom surfaces 111 'and 111 " of the pattern are formed with a high light reflectance or only the edge regions 213' and 213 " of the pattern are formed with high light reflectance, or the patterns 211 ' And the dot patterns 313 'and 313 " constituting the patterns 311' and 311 " can be formed to have a high light reflectance.

12 is a sectional view of a cover sheet for an absorbent article according to a fourth embodiment of the present invention. The cover sheet 400 further includes a nonwoven sheet 420 bonded to the liquid-pervious cover sheet 100, 200, 300 having a shiny pattern and made of SBW, TBCW or TABCW. The nonwoven fabric sheet 420 promotes the extent to which the wearer ' s emissions are absorbed.

Next, a method of forming patterns on the cover sheet of the present invention will be described with reference to Figs. 13 to 23, in which rolls used for pattern formation are shown.

Fig. 13 is a cross-sectional view showing a roll for forming a pattern on a cover sheet according to the first embodiment of the present invention, Fig. 14 is an enlarged view of a portion A in Fig. 13, It is a perspective view.

The sheet material used for the cover sheet 100 is applied as a cover sheet 100 after thermally pressing the sheet material with the roll 500 to form a pattern on the surface thereof. When the sheet material is the perforated film 530, the perforated film 530 enters the roll 500 in a state where the perforation process is completed in advance. The thickness of the perforated film 530 is preferably 0.2 mm to 1.5 mm.

The roll 500 includes a first roll 510 and a second roll 520 disposed with a slight gap to allow the perforated film 530 to pass. A plurality of embossed portions 511 are formed on the surface 510a of the first roll 510 to form a pattern 111 on the cover sheet 100. [ The planar shape of the embossed portion 511 corresponds to the shape of the patterns 111, 111 ', 111 "shown in FIGS. 3, 10A and 11A. The surface 520a of the second roll 520 is flat.

The surface of the first roll 510 (specifically, the surface 511a contacting the perforated film 530 of the raised portion 511) and the second roll 520 Is heated to a predetermined temperature. Such heating may be accomplished in a manner that heats the entire rolls 510 and 520, for example by filling the rolls 510 and 520 with oil and heating the oil, or by heating the rolls 510 and 520, So as to heat the cartridge. The temperature to be heated may be variously selected depending on the composition ratio of the material (i.e., polyethylene / filler) constituting the perforated film 530. Preferably, the temperature is higher than the softening point of the perforated film 530 and lower than the melting point. Specifically, the softening point temperature is 50 to 60 占 폚, and the melting point temperature is 126 占 폚. Depending on the composition of the perforated film 530, only the first roll 510 may be heated to the predetermined temperature.

When the perforated film 530 passes through the first roll 510 and the second roll 520, the pressing on the perforated film 530 is performed by a pressurizing device using hydraulic or pneumatic pressure, and the first roll 510 To the second roll 520, or vice versa, or both to each other.

Referring to FIG. 14, a perforated film 530 is formed as a cover sheet 100, and then the perforated film 530 is moved between the first roll 510 and the second roll 520. As the perforated film 530 passes between the first roll 510 and the second roll 520 and the first and second rolls 510 and 520 rotate, (510) and the second roll (520). At this time, the embossed portion 511 penetrates into the perforated film 530, and a perforated portion 531 is formed in the perforated film 530. This engraved portion 531 becomes the pattern 111, 111 ', 111 "of the cover sheet 100 and the surface of the engraved portion 531 becomes the bottom surface 113, 113', 113". The engraved portion 531 is brought into contact with the surface 511a of the heated embossing portion 511 so that both the embossed portion 511 and the second roll 520 in the thickness direction and the longitudinal direction of the perforated film 530 Thermal deformation occurs due to heat and pressure compression due to the pressure from the first roll 510 and the second roll 520a. During the formation of the engraved portion 531, the material constituting the film is heated to soften and softened and then recrystallized. At this time, the surface of the engraved portion 531 undergoes such thermal deformation that the surface smoothness and the light reflectance are increased do.

The surface 511a of the embossed portion of the first roll 510 (in particular, the surface of the embossed portion 511 which comes into contact with the perforated film 530) has a light reflectance on the surface of the cover sheet 100, Is higher than the light reflectance of the surface of the cover sheet 100 on which the cover sheet 100 is not formed. In the process of forming the engraved portion 531, the surface of the engraved portion 531 is deformed to be similar to or the same as the state of the surface 511a of the embossed portion. Since the smoothness of the surface 511a of the embossed portion is high, the smoothness of the surface of the engraved portion 531 is increased. The light reflectance of the bottom surface 113, 113 ', or 113 " of the pattern formed by the surface 533 of the engraved portion becomes higher than the portion where the pattern 111 of the cover sheet 100 does not exist .

16 is a cross-sectional view showing another structure of a roll for forming a pattern on a cover sheet according to a second embodiment of the present invention, Fig. 17 is an enlarged view of a portion B in Fig. 16, Fig.

The roll 600 includes a first roll 610 and a second roll 420 disposed with a slight gap for passage of the perforated film 630 to be used as a cover sheet. A plurality of embossed portions 611 and 612 for forming a pattern on the cover sheet 200 are formed on the surface 610a of the first roll 610. The embossed portions 611 and 612 are formed around the first embossed portion 611 protruding from the surface 610a of the first roll and the second embossed portion 611 formed around the first embossed portion 611, And an embossed portion 612. The planar shape of the first embossed portion 611 corresponds to the shape of the patterns 211, 211 ', 211 "shown in Figs. 5, 10B, and 11B. The planar shape of the second embossed portion 612 corresponds to the shape of the rim regions 213, 213 ', and 213 " shown in Figs. 5, 10B, and 11B. The surface 612a contacting the perforated film 630 of the second embossed portion 612 is formed so that the light reflectance of the surface of the cover sheet 200 on which the pattern is formed becomes higher than the light reflectance of the cover sheet 200 on which the pattern is not formed It has smoothness. The surface 611a contacting the perforated film 630 of the first embossed portion 611 has a smoothness such that the light reflectance of the perforated film 630 does not change before or after pattern formation or slightly increases after pattern formation. That is, the smoothness of the first embossed surface 611a is lower than the smoothness of the surface 612a of the second embossed portion.

17, the perforated film 630 is formed as the cover sheet 200, and then the perforated film 630 is moved between the first roll 610 and the second roll 520. The perforated film 630 is pressed while passing between the first roll 610 and the second roll 420 heated to a temperature between the softening point and the melting point. At this time, the perforated film 630 is pressed between the blanks 611, 612 and the surface of the second roll 520 to surround the perforated portion 631 and the perforated portion 631 on the surface of the perforated film 630 The imprint 633 is formed. The engraved portions 631 become the patterns 211, 211 'and 211 "of the cover sheet 200 and the impression portions 633 become the edge regions 213, 213', and 213" of the cover sheet 200. The gap or pressure between the first roll 610 and the second roll 520 is such that the surface 612a of the second embossment 612 slightly presses the surface of the perforated film 630 to the surface of the perforated film 630 It is determined enough to cause indentation.

Since the smoothness and the gloss of the surface 612a of the second embossed portion are high in the process of forming the engraved portion 631 and the imprinted portion 633 by the heated embossed portions 611 and 612, The light reflectance of the edge areas 211, 211 ', 211 "becomes higher than the areas 211, 211', 211" and the areas without the patterns 211, 211 ', 211 " .

19 is a sectional view showing a roll for forming both the pattern 211 and the rim area 213 of the cover sheet 200 with a high light reflectance. The smoothness of the surface 611a of the first embossed portion 611 and the surface 612a of the second embossed portion 612 is such that the optical reflectance of the perforated film 630 after pressurization is higher than the optical reflectance of the pre- It is set to increase. The smoothness of the engraved portions 631 'and the impression portions 633 formed by the pressing is increased and the light reflectance of the patterns 211, 211', 211 "and the edge regions 213, 213 ', 213"

Fig. 20 is a cross-sectional view showing still another structure of a roll for forming a pattern on the cover sheet for an absorbent article according to the third embodiment, and Fig. 21 is an enlarged view of a portion C in Fig.

The roll 700 includes a first roll 510 on which an embossed portion 511 for forming a pattern 311 of the cover sheet 300 is formed and a second roll 510 on which a cover sheet 300 And a second roll 720 for forming a dot pattern 313 of the dot pattern 313.

The planar shape of the embossed portion 511 of the first roll 510 corresponds to the shape of the patterns 311, 311 ', and 311 " of the cover sheet 300. The surface 511a contacting the perforated film 730 of the embossed portion 511 has a flatness degree that the light reflectance of the surface of the cover sheet 300 on which the pattern is formed becomes higher than the light reflectance of the surface of the cover sheet 300 on which the pattern is not formed . The second roll 720 has a plurality of fins 721 on the surface 720a. The cross-sectional shape of the pin 721 is circular, square or rhombic.

21, the perforated film 730 is formed as the cover sheet 300, and then the perforated film 730 is moved between the first roll 510 and the second roll 720. The perforation film 730 is pressed while passing between the first roll 510 and the second roll 720 heated to a temperature between the softening point and the melting point. At this time, the pressing portion 511 is pierced into the perforated film 730 to form the engraved portion 731. The engraved portions 731 become the patterns 311, 311 ', and 311 " of the cover sheet 300. Only the portion 733 interposed between the surface 511a of the pressing portion and the surface 721a of the pin 721 in the engraved portion 731 undergoes thermal deformation by thermocompression, It becomes a dotted portion in which the light reflectance of the surface is increased. The dotted portions 733 become dotted patterns 313, 313 ', and 313 "having high light reflectance.

Fig. 22 is a cross-sectional view showing a roll for forming a pattern on a cover sheet for an absorbent article according to a fourth embodiment of the present invention, and Fig. 23 is an enlarged view of a portion D in Fig.

A sheet material 740 which becomes a perforated film 730 and a nonwoven fabric sheet 420 between these rolls in a state that the second roll 720 having the first roll 510 and the pin 721 is heated to the predetermined temperature, The nonwoven fabric sheet 740 is bonded to the perforated film 730 while the engraved portion 731 and the dotted portion 733 are formed. The sheet material 740 is bonded to the perforated film 730 by thermocompression bonding by the first embossed portion 511 and the pin 721. [

After forming the engraved portions 531, 631, and 731 in the perforated films 530, 630, and 730 in the manner described with reference to FIGS. 12 to 23, the cover sheets 100, 200, 300, . Then, the engraved portion 531, the imprinted portion 633, or the dotted portion 733 having a high degree of smoothness and high gloss of the perforated film are shiny than other portions. Therefore, negative images such as plastic that the cover sheets 100, 200, 300, and 400 can give due to the self-gloss disappear, and the engraved patterns can be visually recognized by the wearer. With the cover sheet having such an action, the wearer can not only recognize the absorbent product as a high-quality and high-quality product, but also expect the absorbent performance of the absorbent product to be high.

The present inventors measured the degree of increase in gloss of a perforated film used as a cover sheet for an absorbent product by the above engraving treatment with a gloss meter. The measurement was performed on the cover sheet 200 for the absorbent product of the second embodiment. The size of the specimen used for the measurement was 9 mm × 13 mm for the inclination angle of 45 ° and 9 mm × 18 mm for the inclination angle of 60 ° and was measured five times for each specimen. The tilt angle means the angle between the light and the specimen when measuring the gloss. The gloss meter used for the measurement is Gardenr Micro-gloss. Table 1 shows the degree of gloss increase of the cover sheet used in the absorbent product of the present invention.

Inclination angle  Gloss (unit: GU (Gloss Unit)) Average gloss 45 °
Before processing 4.6 4.7 4.6 4.7 4.8 4.68 After processing 5.2 5.3 5.2 5.8 5.4 5.38 60 °
Before processing 1.8 1.8 2.1 1.8 2.1 1.92 After processing 3.3 2.6 2.6 2.9 3.0 2.88

As can be seen from the above Table 1, the cover sheet for the absorbent product of the present invention exhibited an improvement in gloss of 0.7GU at an inclination angle of 45 ° and an improvement of glossiness of 0.96GU at an inclination angle of 60 ° It looked.

In order to visually recognize the engraved pattern, it is preferable that the difference in glossiness before and after the treatment of the perforated film is at least 0.3 GP or more, more preferably 0.5 GP or more. The concave portions 531, the imprinted portions 633, the dotted portions 733, the bottom surface 113, the edge regions 213, and the dotted patterns 313 are formed on the cover sheet 100, 200, and 300 may be variously selected depending on the shape and type of the desired pattern. Preferably, the ratio of the total area of the cover sheet to the area having high light reflectance is 1: 0.1 to 1 : 0.7.

Although the cover sheets 100, 200, 300 and 400 have heretofore been described as using the perforated films 530, 630 and 730, the cover sheets 100, 200 and 300 may be made of long fibers or short fibers, (Spun Bonded Web), TBCW (Thermal Bonded Carded Web), TABCW (Through Air Bonded Carded Web), and Spunlace may be used. When forming the pattern on these materials, the fibers are instantaneously melted and thermally deformed by the heat and pressure at the portions of the rolls 510 and 610 that contact the raised portions 511, 611, and 612, Since the surface is smooth, the portion in contact with the embossed portion is smoothed to have a higher light reflectance than the portion not in contact with the embossed portion.

Fig. 24 is a plan view showing an embodiment of the absorbent article of the present invention, and Fig. 25 is a sectional view taken along line XXV-XXV in Fig.

The illustrated absorbent article 800 is a sanitary napkin. The absorbent article 800 includes a cover sheet 810 in contact with the wearer's body, a liquid-impervious backsheet 820 disposed on the opposite side of the cover sheet 810, and an absorbent pad 830 disposed therebetween . As the cover sheet 810, the cover sheets 100, 200, 300, and 400 for the absorbent article described above are used.

The cover sheet 810 serves to move the wearer's menses, such as menses or urine, to the absorbent pad 830. The effluent introduced through the cover sheet 810 is absorbed and held within the absorbent pad 830. The backsheet 820 prevents the wearer ' s absorbed absorbent within the absorbent pad 830 from flowing out of the absorbent product 800 to contaminate the wearer ' s garment, and is made of a liquid impervious film. The construction of the absorbent pad 830 is well known to those skilled in the art of the present invention, and thus a detailed description thereof will be omitted.

The absorbent product 800 has a sealing portion 841 which is joined together along the edge portions of the cover sheet 810 and the back sheet 820 to fix the absorbent pad 830. The sealing portion 841 may be formed by a method such as an adhesive, thermal bonding, ultrasonic bonding, or mechanical pressing. The absorbent product 800 further has a wing portion 842 protruding outward from the side surface to prevent leakage of the wearer's discharge. The wing portion 842 is formed integrally with the cover sheet 810 and the back sheet 820.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

As described above, the cover sheet for an absorbent article of the present invention is configured such that the light reflectance of the pattern or the light reflectance of the frame surrounding the pattern is higher than the light reflectance of the other portions of the cover sheet, so that the pattern is visually clear to the wearer Can be recognized. Thus, the wearer does not have a negative feeling or rejection of the absorbent article, and can improve the likelihood of the wearer ' s absorbent article.

Claims (14)

An absorbent article comprising a cover sheet disposed on the body side, a back sheet disposed on the opposite side, and an absorbent pad disposed between the cover sheet and the back sheet, Wherein the cover sheet has a plurality of patterns formed on the surface by thermally bonding the sheet material, Wherein the patterned surface of the cover sheet has a higher degree of flatness and thus has a higher light reflectance than a surface of the cover sheet on which the pattern is not formed. The absorbent article of claim 1, wherein the ratio of the total area of the cover sheet to the area of the patterned surface is from 1: 0.1 to 1: 0.7. An absorbent article comprising a cover sheet disposed on the body side, a back sheet disposed on the opposite side, and an absorbent pad disposed between the cover sheet and the back sheet, Wherein the cover sheet has a plurality of patterns formed on a surface thereof by thermocompression bonding the sheet material and a frame region surrounding the pattern, Wherein the surface of the cover sheet on which the edge region is formed has a higher degree of flatness and a higher reflectance than a surface of the cover sheet on which the edge and the edge region are not formed. The absorbent article according to claim 3, wherein the ratio of the total area of the cover sheet to the area of the surface on which the rim area is formed is 1: 0.1 to 1: 0.7. The absorbent article according to claim 3, wherein a light reflectance of the patterned surface of the cover sheet is higher than a light reflectance of a surface of the cover sheet on which the pattern and the rim area are not formed. 6. The absorbent article according to any one of claims 1 to 5, wherein the sheet material of the cover sheet is a perforated film or a nonwoven selected from the group consisting of SBW, TBCW, TABCW and SPUNLACE. The absorbent article of any one of claims 1 to 5, further comprising a nonwoven sheet bonded to the cover sheet and formed of SBW, TBCW or TABCW. A method of forming a pattern on a cover sheet disposed on a body side of an absorbent article, Preparing the cover sheet by using a sheet material formed with perforations, Moving the cover sheet between a first roll having an embossed portion of a shape corresponding to the pattern on a surface thereof and a second roll disposed at a predetermined distance from the first roll, Wherein the cover sheet is pressed by the first roll and the second roll while passing between the first roll and the second roll in accordance with the rotation of the first roll and the second roll, Wherein the surface of the relief portion contacting the cover sheet and the surface of the second roll are heated while the cover sheet is being pressed by the first roll and the second roll, And a plurality of said patterns are formed on the surface, And the flatness of the patterned surface of the cover sheet is increased so that the light reflectance of the cover sheet is higher than that of the surface on which the pattern is not formed. A method of forming a pattern on a cover sheet disposed on a body side of an absorbent article, Preparing the cover sheet by using a sheet material formed with perforations, A first roll having a first embossed portion having a shape corresponding to the pattern on the surface and a second embossed portion formed around the first embossed portion and a second roll disposed at a predetermined distance from the first roll, Moving the sheet, Wherein the cover sheet is pressed by the first roll and the second roll while passing between the first roll and the second roll in accordance with the rotation of the first roll and the second roll, The surface of the second roll and the surface contacting the cover sheet of the first embossed portion and the second embossed portion are heated while the cover sheet is being pressed by the first roll and the second roll, The cover sheet is thermally pressed by the first embossing portion and the second embossing portion to form a plurality of the patterns and a border region surrounding the patterns, Wherein the pattern of the cover sheet and the surface on which the rim area is formed have a higher degree of smoothness so that the pattern of the cover sheet of the absorbent article is higher in reflectance than the surface of the cover sheet on which the rim and the rim area are not formed. The method according to claim 8 or 9, wherein the temperature of the surface of the first roll contacting the cover sheet and the surface of the second roll in the step of pressing the cover sheet is between the softening point and the melting point of the cover sheet, Wherein the cover sheet is thermocompression bonded between the embossed portion of the first roll and the surface of the second roll to form a pattern on the surface of the cover sheet. 10. The method of claim 8 or 9, wherein the second roll has a plurality of fins having flat end faces on the surface, wherein in the step of pressing the cover sheet by the first roll and the second roll, Wherein the cover sheet is thermally pressed between the embossed portion of the second roll and the pin of the second roll to form a pattern on the surface of the cover sheet and a dot pattern in the pattern. The method as claimed in claim 8 or 9, wherein in the step of preparing the cover sheet, a nonwoven fabric sheet composed of TBCW or TABCW is disposed on one surface of the cover sheet, and the second roll has a plurality of pins And the cover sheet is thermocompression-bonded between the embossed portion of the first roll and the pin of the second roll at the step of pressing the cover sheet by the first roll and the second roll to form a pattern on the surface of the cover sheet Wherein the nonwoven fabric sheet is bonded to the cover sheet. The method according to claim 10, wherein the gloss of the patterned surface of the cover sheet is 0.3GU or more higher than the glossiness of the undegraded surface. 12. The absorbent article as set forth in claim 11, wherein the cover sheet has a pattern on the cover sheet of the absorbent article having a degree of gloss of not less than 0.3 GP or more than the degree of gloss of the pattern and the surface on which the dot- Lt; / RTI >

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