JP2000093458A - Absorbable wearing articles - Google Patents

Abstract

(57) [Summary] [Problem] To provide a wearable article provided with a pattern that can be recognized from the outside when worn. SOLUTION: An absorbent material is arranged between a liquid-permeable top sheet and a liquid-impermeable back sheet, and a printed pattern recognizable from the outer surface when worn on an exterior sheet arranged outside the back sheet when worn. It is applied in a stripe pattern or a lattice pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent wear article, and more particularly to an absorbent wear article in which a printed pattern recognizable from an outer surface when worn is constituted by a stripe pattern or a lattice pattern.

[0002]

2. Description of the Related Art Conventionally, an absorbent wearing article has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent material disposed between these two sheets. The excrement such as urine is held mainly by an absorbent material through a liquid-permeable top sheet, and the liquid-impermeable back sheet prevents the excrement from leaking out of the absorbent wearing article. It is used as a preventive device, and is equipped with a stretchable elastic member and a fixing fastener so that it can be used as an absorptive wearing article that can be used according to its use, and it is also formed in advance in a pants type, etc. A form has been devised. In addition, in the case of disposable diapers for infants, there are many cases where symbols with various characters and sizes are printed on the back sheet, and in pants-type diapers, this pattern identifies the front and rear of the diaper. There is.

[0003] Also, Japanese Patent Application Laid-Open No. 3-90602 discloses that
There is disclosed an invention in which a display element is defined by joining a third member interposed between a top sheet and a back sheet and a back sheet with a group of colored dot adhesives and making intervals between the dots dense. .

[0004]

In recent years, disposable diapers often have a nonwoven fabric or the like disposed outside the backsheet, and when a plurality of layers of sheets are disposed outside the backsheet, the design is poor. It is necessary to print a design on an exterior sheet such as a non-woven fabric because it is difficult to recognize.

In the method of displaying a pattern with a colored dot adhesive group disclosed in Japanese Patent Application Laid-Open No. 3-90602, a good pattern can be displayed when printing on a smooth surface such as a film. However, when printing on a surface having a lot of irregularities such as a nonwoven fabric, there is a problem that if the dot portion exactly hits the concave portion, the printing is not performed well and the entire design is blurred.

[0006] An object of the present invention is to solve the above-mentioned problems of the conventional absorbent printing article on which pattern printing is performed, and to provide an absorbent wearing article having a printed pattern which is well recognized from the outer surface when worn. It is in.

[0007]

The present invention that can achieve the above object includes, for example, the following inventions. (1) The present invention relates to an absorbent wearing article having a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent material disposed between the two sheets. Is that an exterior sheet made of at least one layer of nonwoven fabric is arranged, and that the exterior sheet is printed with a stripe pattern or a lattice pattern recognizable from the outer surface when worn. The present invention relates to a characteristic absorbent wearing article.

(2) The present invention also relates to the absorbent wearing article according to (1), wherein the printed pattern is formed of a colored thermoplastic resin.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the absorbent wearing article of the present invention, an exterior sheet made of a nonwoven fabric is arranged outside a back sheet, and a stripe pattern or a lattice pattern is printed on the exterior sheet. . In the absorbent wearing article of the present invention having such a configuration, since excellent printing is performed on the exterior sheet, it is easy to confirm printing from the outer surface, and it is easy to confirm the size of the article and the front and rear. In the present invention, the printing means is not particularly limited, but conventional gravure printing, flexographic printing, inkjet printing, or the like is used. Among them, flexographic printing is preferable because pattern formation is relatively easy and can correspond to high-speed printing.
It is also possible to print on the diaper manufacturing process.

[0010] In addition, it is preferable that the nonwoven fabric is printed, since it looks slightly faint because the pattern gives a gentle impression.

The printed pattern is constituted by a stripe pattern or a lattice pattern which is an aggregate of continuous lines. In the printing of discontinuous patterns such as dots, printing on uneven surfaces such as non-woven fabrics, if the dots just hit the recesses of the non-woven fabric, printing does not go well and the entire design is blurred That is, it is not preferable because the pattern becomes difficult to recognize. In the case of an aggregate of continuous lines, printing can be performed even if unevenness is present in the nonwoven fabric, and there is no blurring until the printed pattern becomes difficult to recognize. The direction of the stripe pattern may be any of the vertical direction, the horizontal direction or the diagonal direction, and the lattice pattern may be a normal vertical or horizontal line lattice or a lattice with diagonal lines, and the intersecting lines may not necessarily be orthogonal. . A printed pattern composed of a stripe pattern or a lattice pattern is effective for printing on a nonwoven fabric having irregularities, but it is also possible to print on a smooth surface such as a film.

The thickness of the line of the stripe pattern or the lattice pattern is 0.05 to 1 mm, and the pitch of the line is 0.15 to 2 mm.
Is preferably within the range. Line thickness is 0.05mm
If it is less than 1 mm, the line is too thin, making it difficult to recognize the printed pattern, while if it is more than 1 mm, the resolution of the fine portion of the printed pattern is reduced. Also, if the pitch of the line is larger than 2 mm, printing of a fine pattern cannot be performed.
When the line pitch is less than 0.15 mm, adjacent lines are united when printed, and a stripe pattern or a lattice pattern cannot be formed.

In order to form a printed pattern in a stripe or grid pattern, the ink on the groove of the roll in which the striped or grid pattern groove is engraved is transferred to a transfer roll on which the printed pattern is engraved. After that, by coating the sheet, it is possible to print a printed pattern composed of a striped or latticed aggregate. In addition, it is also possible to engrave and print a print pattern formed in a stripe or lattice shape directly on a roll. When printing in this way, continuous patterns can be printed.When printing on a diaper production line, set the circumference of the roll engraved with the printed pattern to an integral multiple of the product length. It is also possible to print one point at a predetermined location by adjusting the position.

The printing ink may be selected depending on the material to be printed, and is not particularly limited. However, it is preferable to use a colored thermoplastic resin as the ink. If it is a thermoplastic resin, it will not cause color transfer or bleeding of the pattern at normal temperature, and if it is a sticky resin, it can be used as it is as an adhesive between sheets. Although usable thermoplastic resins are not particularly limited, polyvinyl acetate resin, polyvinyl butyral, acrylic resin, polyamide, ethylene-vinyl acetate copolymer, ethylene-acrylate copolymer and the like are used as main components. is there. In particular, an olefin-based adhesive having a low adhesiveness is preferable because a trouble such as a sheet being adhered to a line in a manufacturing process hardly occurs.

In the present invention, the outer sheet disposed outside the back sheet is formed of a nonwoven fabric. The exterior sheet may be formed of a single layer of nonwoven fabric.
It may be formed in a multi-layer structure by a non-woven fabric having more than one layer. When the exterior sheet is formed of one layer of nonwoven fabric, printing is performed on the inside of the exterior sheet, and when the exterior sheet has a multilayer structure, two layers from the inside of the outermost nonwoven fabric or from the outermost layer Printing is applied inside the nonwoven fabric of the eye. The nonwoven fabric forming the exterior sheet is not particularly limited, and may be formed of fibers such as polypropylene, polyethylene, polyester, and nylon, or fibers of polyester, polypropylene, polyethylene, and nylon, or a composite fiber obtained by combining two or more types of these. can do. Further, the weight of the nonwoven fabric is preferably 10 to 30 g / m ² so that the printed pattern can be recognized from the outer surface.

As the liquid-permeable topsheet used in the absorbent wearing article of the present invention, a liquid-permeable nonwoven fabric made of synthetic fibers made of polyethylene, polypropylene, polyester, or other thermoplastic resin can be used. The liquid-impermeable back sheet may be a liquid-impermeable polyethylene sheet, preferably a polyethylene sheet having micropores, a moisture-permeable liquid-impermeable sheet obtained by adding a filler to a thermoplastic resin and stretching. Used
It is preferable to use a material provided with moisture permeability because it is more comfortable because there is no fear of stuffiness.

In the absorbent wearing article of the present invention, an elastic elastic member can be arranged in the opening around both feet and the opening around the waist for the purpose of preventing leakage and slippage when worn. As the elastic members arranged in the opening around both legs and the opening around the waist, the elastic members used in ordinary disposable diapers such as urethane thread and thread rubber can be used as they are. In a stretched state, the members are bonded and fixed to predetermined regions by a hot melt adhesive at the opening around the leg and the opening around the waist. In this case, between the back sheet and the exterior sheet, or
It is also possible to arrange a stretchable elastic member at the position of the opening around the foot and the opening around the waist between the nonwoven fabrics forming the multi-layered exterior sheet.

In the present invention, the absorbent material preferably comprises fluff pulp as a main component and a superabsorbent polymer in combination. In addition, absorbent paper alone, or a mixture or laminate of heat-fused fibers or the like is used. Further, it is preferable to adopt a laminated structure in which the whole is wrapped with an absorbent paper such as a tissue. The shape of the absorber may be an hourglass type or a rectangular type, but the hourglass type provides better fit.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail by taking a pants-type disposable diaper as an example. FIG. 1 is a perspective view showing a pants-type disposable diaper according to the present invention. The pants-type disposable diaper 1 shown in FIG. 1 has a leg opening 2 and a waist opening 3, and has a rear body 4 and a front body formed to extend between the left and right leg openings. Reference numeral 5 is adhesively closed by a side seam 6, and a printed pattern 7 that can be recognized from the outer surface when worn is provided on the back body 4 side.

FIG. 2 is a side view of the pants-type disposable diaper 1 of the present invention shown in FIG. It is a cross-sectional view showing a state. In FIG. 2, the disposable diaper 1 has a liquid-permeable topsheet 8.
And a liquid-impermeable backsheet 9 and an absorbent material 10 disposed between the two sheets. In this case, the absorbent material 10 is a liquid-permeable topsheet disposed over it. 8 and a liquid-impermeable back sheet 9 disposed over the lower surface and side surfaces thereof. Outside the back sheet 9, an inner sheet 14 and an outer sheet 15 made of two nonwoven fabrics are arranged to form an exterior sheet 22. Between the inner sheet 14 and the outer sheet 15, an outer sheet 22 is formed. A recognizable print pattern 7 is provided, and a stretchable elastic member 13 is arranged between the two sheets. Further, it is also possible to arrange a stretchable elastic member on the top sheet 8 or the back sheet 9 to form a leakage prevention gather.

FIG. 3 shows the pants-type disposable diaper 1 of the present invention shown in FIG. It is a cross-sectional view showing a state and showing another example different from FIG. In FIG. 3, the disposable diaper 1 includes a liquid-permeable top sheet 8, a liquid-impermeable back sheet 9,
It consists of an absorbent material 10 arranged between these two sheets and an auxiliary sheet 12 arranged between the absorbent material 10 and the backsheet 9, in which case the absorbent material 10 A liquid-permeable topsheet 8 disposed;
It is wrapped by the auxiliary sheet 12 arranged so as to cover the lower surface and the side surface. Further, an exterior sheet 22 made of one nonwoven fabric is arranged outside the back sheet 9, and a printed pattern 7 that can be recognized from the outside when worn is provided between the exterior sheet 22 and the back sheet 9. Further, an elastic member 13 is arranged between the two sheets. In addition, top sheet 8 or side flap 1
It is also possible to form a leak-proof gather by arranging an elastic member at 2.

FIG. 4 shows an example of a printed pattern used in the present invention. The printed pattern is composed of a set of straight lines inclined downward at an angle of 45 °.

FIG. 5 is a diagram showing a printed pattern used in the present invention.
This is another example, and the printed pattern is formed by a so-called iris pattern aggregate, which is a diagonal lattice formed by a straight line of 45 ° diagonally lower right and a straight line of 45 ° diagonally lower left orthogonal thereto. I have.

FIG. 6 shows an example in which a printed pattern is applied to the exterior sheet 22 by flexographic printing using a hot melt resin in the present invention. In FIG. 6, the colored hot melt resin 17 is fluidized in a heated tank 16, and the hot melt resin 17 is stored in stripes or lattice grooves cut in a pattern roll 18 and transferred to a transfer roll 19. The hot melt resin is transferred to the convex portion of the transfer roll 19 engraved with the printed pattern, and the pressing roll 2 is transferred.
The printed outer sheet 22 is printed on the outer sheet 22 to form a striped or lattice-shaped printed pattern.
And glued. In this case, it is also possible to arrange an elastic member between the back sheet 9 and the exterior sheet 22.

[0025]

According to the absorbent wearing article of the present invention, the printed pattern recognizable from the outer surface when worn is applied to the nonwoven fabric constituting the exterior sheet, and the printed pattern is constituted by a stripe pattern or a lattice pattern. This makes it possible to give a soft and gentle impression as if the pattern is blurred, since the pattern is not blurred and the border is not smooth and unevenness is generated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a pants-type disposable diaper according to the present invention.

FIG. 2 is a cross-sectional view showing a state in which a side seam of the pants-type disposable diaper of FIG.

FIG. 3 is a cross-sectional view showing another example different from FIG. 2, showing a state in which the side seams of the pants-type disposable diaper of FIG. 1 are opened and opened, and the back body is cut in the width direction.

FIG. 4 is an example of a printed pattern constituted by a stripe pattern.

FIG. 5 is an example of a printed pattern composed of a lattice pattern.

FIG. 6 is a process chart showing the principle of a facility for applying a printing pattern by flexographic printing according to the present invention.

[Explanation of symbols]

 1: Pants type disposable diaper 2: Leg opening 3: Waist opening 4: Back body 5: Front body 6: Side seam 7: Printing pattern 8: Liquid permeable top sheet 9: Liquid impermeable Back sheet 10: Absorbent material 11: Absorbing paper 12: Auxiliary sheet 13: Elastic elastic member 14: Inner layer sheet 15: Outer layer sheet 16: Tank 17: Hot melt resin 18: Pattern roll 19: Transfer roll 20: Pressing roll 21 ： Press roll 22 ： Exterior sheet

Claims (2)

[Claims] 1. An absorbent wearing article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent material disposed between the two sheets. An exterior sheet made of at least one layer of nonwoven fabric is arranged, and the exterior sheet is printed with a stripe pattern or a lattice pattern recognizable from the outer surface when worn. Absorbent wearable article. 2. The absorbent wearing article according to claim 1, wherein said printed pattern is formed of a colored thermoplastic resin.