CN204394814U - Absorbent article composite sheet - Google Patents

Abstract

The utility model relates to the technical field of absorbent sanitary products, and discloses a composite sheet of absorbent sanitary products, comprising a first sheet and a second sheet combined together, and a plurality of hollow sheets are arranged on the first sheet. protruding parts, the protruding parts are located in the direction away from the second sheet, and several bonding concave points are arranged at the circular root of each of the protruding parts, and the bonding concave points connect the The first sheet is bonded to the second sheet, the number of the bonding recesses is greater than the number of the protrusions, and the size of the bonding recesses is smaller than the size of the protrusions. Two adjacent bonding recesses are connected by a bonding segment, and the bonding depth of the bonding segment is greater than that of the bonding recesses. The utility model adopts the convex-concave structure formed by the two-layer material, and when in contact with the human skin, the convex part is deformed under pressure, the convex state is good, and the effect of breathability and dryness is achieved in a real sense.

Description

Composite sheets for absorbent hygiene products

technical field

The utility model relates to the technical field of absorbent sanitary products, in particular to a composite sheet of absorbent sanitary products.

Background technique

Absorbent hygiene articles generally consist of a liquid-permeable topsheet for skin-contact use, a liquid-impermeable backsheet for non-skin-contact use, and an absorbent core layer between the liquid-permeable topsheet and the liquid-impermeable backsheet. Among them, the liquid-permeable surface layer, as the surface layer material in direct contact with human skin, is required to have the advantages of fast penetration speed, reduced liquid side flow, reduced back seepage, and contact with human skin at the same time, it must have the advantages of softness, good air permeability, and low irritation. .

At present, the surface layer of common absorbent hygiene products is usually made of conventional non-woven fabric or thermoplastic perforated film. Liquid residue on the surface, poor dryness and other disadvantages; thermoplastic perforated film has the advantages of fast absorption, dryness, and not easy to reverse osmosis, but its disadvantages cannot be ignored, such as poor air permeability, and it is prone to allergies when it is in contact with the skin for a long time.

In order to solve the above problems and meet the functional requirements of absorbent sanitary products as the surface material, a Chinese patent (application number: CN201120437895.7) discloses a "pearl non-woven fabric", which contains pearl-shaped hemispherical fabrics on the surface. The bulge is a hollow hemispherical bulge, which greatly reduces the contact area between the cloth and the skin and reduces the probability of skin diseases. The spherical top has good comfort, and greatly improves the air permeability of the products made of it, making the skin more dry. Because it is a hollow raised part, the temporary liquid storage capacity of the product is increased, and the dryness is good.

In addition, the Chinese patent (application number: CN201320426291.1) discloses a "three-dimensional non-woven fabric", the surface of which includes several convex parts in contact with the skin and several concave parts, convex parts and concave parts Spaced apart from each other, and the base material of the convex part is consistent with the concave part, the contact angle of 20% to 100% of the area of each convex part with water is greater than 70°, and the area of 20% to 100% of each concave part is in contact with water The contact angle of water is less than 70° so as to realize the diversion and diffusion of liquid, fast absorption, and dryness requirements.

The above two published patents disclose two different technical solutions of convex-concave non-woven fabrics, which accelerate the rapid absorption of liquid to a certain extent, and improve the breathable, dry and comfortable feeling of the liquid-permeable surface layer in contact with human skin. However, the above two This kind of non-woven fabric also has the following imperfections. Since the single-layer convex-concave non-woven fabric is used, when the convex part is in contact with the human skin, it is often affected by the pressure from all aspects of the body, and the convex state is greatly reduced. In addition, to realize the convex-concave three-dimensional shape of the non-woven fabric, it is often necessary to use a thicker non-woven fabric with a higher grammage; in addition, the surface layer of the convex-concave non-woven fabric often needs to be bonded and compounded with other materials in the lower layer through hot-melt adhesives. Made into absorbent hygiene products, "pearl non-woven fabric" has the potential to reduce the potential risk of embossing effects by bonding the top of the embossment to the underlying material because the bottom surface of the hollow protrusions will be in contact with the hot melt adhesive.

Utility model content

In order to solve the above-mentioned technical problems, the utility model provides a composite sheet for absorbent hygiene products, which improves the rapid absorption and diffusion of liquid in the vertical direction and the plane direction through the perfect convex and concave effect.

The technical scheme that the utility model takes is:

A composite sheet for absorbent hygiene products, comprising a first sheet and a second sheet combined together, characterized in that a plurality of hollow raised parts are arranged on the first sheet, and the raised parts The portion is located in the direction away from the second sheet, and several adhesive recesses are arranged at the circular root of each of the protrusions, the number of the adhesive recesses is greater than the number of the protrusions, so The size of the bonding concave point is smaller than the size of the protrusion, and two adjacent bonding concave points are connected by a bonding section, and the bonding concave point and the bonding section connect the first sheet with the The second sheet is bonded, and the bonding depth of the bonding segment is greater than the bonding depth of the bonding recess.

Further, in the first sheet, the density of the sheet at the protrusion is the smallest, the density of the sheet at the bonding concave point is the largest, and the density of the sheet at the bonding section is between the above two.

Further, the cross-sectional shape of the protrusion is arched, and the planar shape of the bonding concave point is circular or polygonal.

Further, the surface area of each bonding concave point is 0.01 to 10 mm ² , and the bonding area of all the bonding concave points accounts for 5% to 50% of the area of the first sheet.

Further, the material of the first sheet and the second sheet is one of a liquid-permeable non-woven fabric, a plastic film, a composite of a liquid-permeable non-woven fabric and a plastic film, and the first and second sheets The material of the second sheet is the same material or different materials.

Further, the density of the first sheet is smaller than the density of the second sheet.

Further, the widths of the first sheet and the second sheet are not equal, and the first sheet is partially combined with the second sheet.

Further, the portion of the first sheet that does not overlap with the second sheet is in a planar shape.

Further, the part of the first sheet that does not overlap with the second sheet also has a hollow raised portion, and adhesive recesses surrounding the raised portion, and two adjacent adhesive recesses Connected by glued segments.

The beneficial effects of the utility model are:

(1) The utility model adopts the raised portion formed on the first sheet of the composite sheet, and the concave points are bonded and fixed at the first sheet and the second sheet to fix the raised portion. The convex-concave structure formed by this kind of two-layer material has the characteristics of small pressure deformation of the convex part when it is in contact with human skin, and the convex state is in good condition, which truly achieves breathable and dry effects;

(2) The composite sheet for absorbent hygiene products of the present invention has a low-density area on the raised portion of the first sheet, a medium-density area between each raised portion and the adhesive concave point, and an adhesive High density areas formed by bonded segments, and highest density areas formed by bonded dimples next to low density areas of raised portions. This density gradient distribution is conducive to the rapid absorption of liquid and downward penetration. First, the liquid penetrates from the raised part that contacts the skin. Due to the effect of density gradient difference, it quickly moves to the high-density area in the vertical direction. Pit penetration.

(3) In the composite sheet of absorbent sanitary products of the present invention, the interior of the protrusion is a hollow structure. When the amount of liquid is large enough to infiltrate the lower material, the protrusion of the hollow structure has the function of temporarily storing liquid. In addition, The circumference of each protruding part is provided with several bonding concave points and bonding segments connected with the second sheet, which suppresses the risk of liquid flowing laterally to the left and right to a certain extent.

(4) Every two bonding concave points are connected by bonding segments, forming a point-line-point-line... organic combination, which avoids weak bonding strength when each bonding concave point exists independently , at the same time, the bonding segment and the bonding concave point are organically combined and surround each raised portion, which helps to maintain the shape of the raised portion.

(5) The part of the first sheet that does not overlap with the second sheet also has the shape of a convex part, a bonding concave point, and a bonding segment. The structure also acts to absorb and trap liquids, further reducing the risk of side leakage.

Description of drawings

Accompanying drawing 1 is the structural schematic diagram of partial frontal top view of the composite sheet of the utility model absorbent sanitary product

Accompanying drawing 2 is the M-M sectional view among accompanying drawing 1;

Accompanying drawing 3 is the N-N sectional view among accompanying drawing 1;

Accompanying drawing 4 is the H-H sectional view among accompanying drawing 1;

Accompanying drawing 5 is the schematic cross-sectional view of a kind of embodiment of composite sheet;

Accompanying drawing 6 is the schematic cross-sectional view of a kind of embodiment of composite sheet;

Accompanying drawing 7 is the schematic cross-sectional view of a kind of embodiment of composite sheet;

Accompanying drawing 8 is a schematic cross-sectional view of an embodiment of a composite sheet.

Detailed ways

The specific implementation of the composite sheet for absorbent sanitary products of the present invention will be described in detail below in conjunction with the accompanying drawings.

Referring to accompanying drawings 1 to 4, the absorbent sanitary product composite sheet 1 has two layers of sheets, including the first sheet 2 on the top and the second sheet 3 on the bottom. Looking from top to bottom, the first sheet 2 On the second sheet 3 partially or fully overlapped, the first sheet 2 has a plurality of protrusions a arranged in a certain direction, and the circular root of each protrusion a is provided with a Several adhesive recesses b connected together, and the circumference of each raised portion a is provided with several closed or open-closed adhesive recesses b around, and then, viewed from one side, the raised portion The inside of a is a hollow structure, the top is in the shape of an arc (arch), and the convex part a and the bonding concave point b are arranged in a regular staggered distribution, and two adjacent bonding concave points b pass through the bonding section c connection, the bonding depth of the bonding segment c is greater than the bonding depth of the bonding concave point b.

Observing along the M-M, N-N, and H-H cross-sectional directions of the composite sheet 1, in the M-M cross-sectional direction, there are low-density areas P1 with longitudinally alternately distributed raised portions a, and each raised portion a is sequentially arranged from near to far The highest density region P3 of bonding pits b, and the medium density region P2 between two bonding pits b. Looking at the N-N cross-sectional direction, there are low-density regions P1 with raised portions a distributed alternately in the lateral direction, and medium-density regions P2 between every two raised portions a low-density regions P1; Distribute the low-density area P1 of the raised portion a, and the medium-density area P2 between every two low-density areas P1 of the raised portion a. It should be pointed out that the density of the bonding segment is smaller than the density of the bonding pits.

The bonding depth of the bonding section is greater than the bonding depth of the bonding concave point, which means that the thickness (or height) of the bonding portion of the bonding segment and the second sheet is greater than the bonding concave point, which is also the density of the bonding segment is less than The reason for the density of bonding pits. The area of a single convex portion a of the composite sheet 1 is much larger than the area of a single bonding concave point b, and the number of all bonding concave points b of the composite sheet is far greater than the number of all convex portions a, and each convex The height value H1 of the low-density area P1 of part a is greater than the height value H2 of the medium-density area P2, and the height value H2 of the medium-density area P2 is greater than the height value H3 of the highest density area P3 of the bonding pit c, satisfying the relationship: H1>H2> H3.

The bonding recess b and the bonding segment c jointly bond the first sheet 2 and the second sheet 3 together. The shape of the bonding recess b in this embodiment is circular, and the circumference of each protrusion a A similar hexagonal heat-seal bonding portion composed of 6 circular bonding recesses b, the bonding recess b can also be circular or polygonal. The surface area of the bonding recess b is 0.01-10mm ² , and the total bonding area of the plurality of bonding points b contained in the first sheet 2 is 5-50%.

The first sheet 2 is a liquid-permeable flexible material, preferably a non-woven fabric made of chemical fibers containing a certain melting point, where fibers with a certain melting point can be selected from polypropylene, polyethylene, polyethylene terephthalate, etc. Made of thermoplastic polymers, or composite fibers containing at least two components such as polypropylene, polyethylene, polyethylene terephthalate, etc., directly formed by polymers, or bonded by hot air and spunlace , chemical bonding, etc. made of non-woven fabrics. Preferable composite fibers containing at least two components such as polypropylene, polyethylene, polyethylene terephthalate, etc., the fiber length is between 38-51mm, the fiber fineness is 0.8-5dtex, and the number of single fiber crimps is large , a fluffy air-bonded non-woven fabric made of roughly wavy or spiral crimped composite fibers. The basis weight of the first sheet 2 is preferably 12-40 gsm.

The second sheet 3 is also a liquid-permeable flexible material, which may be a liquid-permeable non-woven fabric or a plastic film or a composite of a liquid-permeable non-woven fabric and a plastic film. When liquid-permeable non-woven fabrics are selected, it is preferable to have hot-air non-woven fabrics made of composite fibers composed of at least two components of polymer fibers such as polypropylene, polyethylene, and polyethylene terephthalate. The fiber length is 38 Between -51mm, the fiber fineness is 1-10dtex, and the basis weight of the first sheet 2 is preferably 8-30gsm. The unit volume density of the first sheet 2 is lower than that of the second sheet 3.

Referring to accompanying drawing 5, see from the lateral width side of composite sheet 1, the first sheet 2 and the second sheet 3 of this composite sheet 1 have the same width in vertical direction up and down, overlap each other, composite sheet 1 The convex-convex bonding is carried out in the entire width direction where the first sheet 2 and the second sheet 3 overlap each other, and the entire width direction where the first sheet 2 and the second sheet 3 overlap each other has bonding concave points b .

Referring to accompanying drawing 6, from the lateral width side of composite sheet 1, first sheet 2 and second sheet 3 of this composite sheet 1 vertical widths are inconsistent, the second sheet 3 is opposite to the first sheet 3. The sheet 2 is wider and only partly overlaps each other, the composite sheet 1 is embossed only in the direction in which the first sheet 2 and the second sheet 3 overlap each other, and the first sheet 2 and the second sheet 3 There are bonding recesses b in the overlapping directions, but the side where the second sheet 3 is not overlapped with the first sheet 2 is not bonded with convexo-concaves, and the original shape of the second sheet 3 is still maintained. Of course, those skilled in the art can imagine that the part of the second sheet 3 that does not overlap with the first sheet 2 can also be bonded by concave and convex.

Referring to accompanying drawing 7, from the lateral width side of composite sheet 1, the first sheet 2 and the second sheet 3 of this composite sheet 1 vertical widths are inconsistent, the first sheet 2 is opposite to the second The sheet 3 is wider and only partly overlaps each other, the composite sheet 1 is embossed only in the direction in which the first sheet 2 and the second sheet 3 overlap each other, and the first sheet 2 and the second sheet 3 There are bonding recesses b in the overlapping directions, but the side where the first sheet 2 and the second sheet 3 are not overlapped does not carry out convex-concave bonding, and still maintains the original shape of the first sheet 2 .

Referring to accompanying drawing 8, from the lateral width side of composite sheet 1, the first sheet 2 and the second sheet 3 of this composite sheet 1 are inconsistent in the vertical direction width, and the first sheet 2 is opposite to the second sheet. The sheet 3 is wider and only partially overlaps each other. The composite sheet 1 is not only convex-convex bonded in the direction in which the first sheet 2 and the second sheet 3 overlap each other, but also the first sheet 2 and the second sheet 3 There are bonding recesses b in the overlapping directions, and the first sheet 2 that does not overlap with the second sheet 3 is also bonded convexly and concavely, and the bonding recesses b and the bonding segment c are organically combined and Surrounding each protrusion a helps to maintain the shape of the protrusion a.

This composite sheet 1 with staggered convex and concave is applied on the surface layer of absorbent sanitary products. The low-density area P1 with the convex part a contacts with the human skin, and the liquid first sticks from the low-density area P1 to the high-density area in the vertical direction. In the horizontal direction, the liquid will eventually flow to the high-density area of the bonding section to permeate and diffuse. The adhesive section and the raised part a will block the liquid from diffusing to other directions to a certain extent, especially when the amount of liquid is large and the surface material has no time to absorb, the hollow structure inside each raised part a can temporarily store the liquid from the body. The excreted liquid plays a very good purpose of preventing side leakage. In addition, only the raised portion a is in contact with the human skin, which is beneficial in terms of dryness and air permeability.

The above are only preferred embodiments of the present utility model, and it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, some improvements and modifications can also be made, and these improvements and modifications should also be considered It is the protection scope of the utility model.

Claims (9)

1. A composite sheet for absorbent hygiene products, comprising a first sheet and a second sheet combined together, characterized in that: the first sheet is arranged with a plurality of hollow bulges, the The protrusions are located in a direction away from the second sheet, and several adhesive recesses are arranged at the circular root of each protrusion, and the number of the adhesive recesses is greater than the number of the protrusions , the size of the bonding recess is smaller than the size of the protrusion, two adjacent bonding recesses are connected by a bonding segment, and the bonding recess and the bonding segment connect the first sheet The material is bonded to the second sheet, and the bonding depth of the bonding segment is greater than the bonding depth of the bonding recess. 2. The composite sheet for absorbent hygiene products according to claim 1, characterized in that: in the first sheet, the density of the sheet at the convex portion is the smallest, and the density of the sheet at the bonding concave point is the largest, The sheet density at the bonded section is between the above two. 3. The composite sheet for absorbent hygiene products according to claim 1, characterized in that: the cross-sectional shape of the raised portion is arched, and the planar shape of the bonding concave point is circular or polygonal. 4. The composite sheet for absorbent sanitary products according to any one of claims 1 to 3, characterized in that: the surface area of each of the bonding recesses is 0.01 to 10 mm ² , and all the bonding recesses The bonding area accounts for 5% to 50% of the area of the first sheet. 5. The absorbent sanitary product composite sheet according to any one of claims 1 to 3, characterized in that: the material of the first sheet and the second sheet is liquid-permeable non-woven fabric, plastic film 1. One of the composites of liquid-permeable non-woven fabric and plastic film, the materials of the first sheet and the second sheet are the same material or different materials. 6. The composite sheet for absorbent hygiene products according to any one of claims 1 to 3, characterized in that: the density of the first sheet is smaller than the density of the second sheet. 7. The composite sheet for absorbent sanitary products according to any one of claims 1 to 3, characterized in that: the widths of the first sheet and the second sheet are not equal, and the widths of the first sheet and the second sheet are unequal. The second sheet is partially bonded. 8. The composite sheet for absorbent hygiene products according to claim 7, wherein the portion of the first sheet that does not overlap with the second sheet is in a planar shape. 9. The composite sheet for absorbent hygiene products according to claim 7, characterized in that: the portion of the first sheet that does not overlap with the second sheet also has a hollow raised portion, and the raised portion surrounding the raised portion Adhesive recesses around the starting part, two adjacent adhesive recesses are connected by an adhesive segment.