A sanitary napkin with a cool surface layer

Abstract

The present invention discloses a sanitary napkin with a cool surface layer, which relates to the technical field of sanitary products. The sanitary napkin comprises a base film, an absorbent core and a cool surface layer. The absorbent core is fixed on the base film, and the cool surface layer is arranged on the absorbent core. The cool surface layer comprises a skin-friendly surface layer, and the skin-friendly surface layer is composed of alternately arranged plane unit strips and raised unit strips. The plane unit strips and the raised unit strips are arranged along the length direction of the absorbent core. The bottom surface of the raised unit strips and the plane unit strips are on the same plane. The cross-section of the raised unit strips is an incomplete ellipse. The height direction of the raised unit strips is the direction of the major axis of the ellipse. The height of the raised unit strips is 0.7 to 0.9 of the major axis of the ellipse. The raised unit strips are filled with cool fibers. The sanitary napkin with a cool surface layer can eliminate the stuffy and damp feeling in the user's private parts.

Description

Technical Field

[0001] The present invention relates to the technical field of sanitary products, in particular to a sanitary napkin with a cool surface layer. Background Art

[0002] Sanitary napkins usually consist of three parts: a base film, an absorbent core, and a surface layer. Since menstrual blood has a certain temperature, when it flows onto the sanitary napkin, the user's private parts will feel stuffy and damp, which is not a good experience to use. Summary of the Invention

[0003] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide a sanitary napkin with a cool surface layer to solve the problem of the sanitary napkin being hot and humid.

[0004] The purpose of the present invention is achieved by adopting the following technical solutions:

[0005] A sanitary napkin with a cooling surface layer, comprising a base film, an absorbent core, and a cooling surface layer, wherein the absorbent core is fixed to the base film, the cooling surface layer is disposed on the absorbent core, and the cooling surface layer comprises a skin-friendly surface layer, wherein the skin-friendly surface layer is composed of alternating planar unit strips and raised unit strips, wherein the length direction of the planar unit strips and the raised unit strips is the length direction of the absorbent core, the bottom surface of the raised unit strips and the planar unit strips are coplanar, the cross-section of the raised unit strips is an incomplete ellipse, the height direction of the raised unit strips is the direction of the major axis of the ellipse, the height of the raised unit strips is 0.7 to 0.9 of the major axis of the ellipse, and the raised unit strips are filled with cooling fibers;

[0006] The preparation method of the cool-sensing fiber comprises the following steps: mixing and stirring a dispersant, water and paper fiber under ultrasound, and then beating the fiber to obtain fiber pulp, adding phase change microcapsules into the fiber pulp and mixing evenly to obtain a mixed pulp, oblique-net forming the mixed pulp, and then drying the mixed pulp to obtain the cool-sensing fiber.

[0007] Furthermore, the core of the phase-change microcapsule is paraffin, and the capsule wall is polyurethane.

[0008] Furthermore, a plurality of water absorption holes are provided on the raised unit strip, and the water absorption holes are square or circular, and the hole diameter of the water absorption holes is 0.5 to 1 mm.

[0009] Furthermore, the raised unit strip is bounded by the minor axis of the ellipse, the area above the minor axis of the ellipse is recorded as the raised upper part, and the area below the minor axis of the ellipse is recorded as the raised lower part; the water absorption hole is provided in the raised lower part of the raised unit strip.

[0010] Furthermore, a plurality of the water absorption holes are arranged at equal intervals on the raised unit strip, and a plurality of the water absorption holes are arranged along the length direction of the raised unit strip.

[0011] Furthermore, the cool surface layer is formed by a mold, the mold surface is provided with a plurality of filling grooves that match the shape and position of the raised unit strips, the bottom of the filling grooves is provided with an air suction hole, the air suction hole is connected to an air suction device, a flat platform that matches the shape and position of the flat unit strips is formed between two adjacent filling grooves, and the mold is provided with pressing parts around it;

[0012] The preparation method of the cool surface layer includes the following steps: taking two pieces of skin-friendly fabrics, respectively designated as the first fabric and the second fabric, fixing the four sides of the first fabric to the mold surface by means of a pressing part, turning on the suction device, the suction device continuously sucking air, adsorbing the first fabric into the filling groove through the suction hole, and filling the filling groove with cool fibers at the same time; when all the filling grooves are filled, applying glue on the first fabric at the flat table position, aligning the second fabric with the first fabric and pasting it, and then cutting it into the desired shape to obtain the skin-friendly surface layer.

[0013] Furthermore, the ratio of the bottom width of the raised unit strip to the width of the plane unit strip is 1:1.5-3.5, the bottom width of the raised unit strip is 0.5-1 mm, and the short axis length of the raised unit strip is 2-2.5 mm.

[0014] Furthermore, the dispersant is polyvinyl alcohol, and the mass ratio of the dispersant to the paper fiber is 1:(50-70).

[0015] Furthermore, the mass volume ratio of the paper fiber to the water is 1:(300-400).

[0016] The base film includes an absorption area, adhesive wings and two edge areas. The absorption core is adhered to the absorption area. The adhesive wings are fixed on both sides of the length direction of the base film. The back areas of the absorption area and the adhesive wings are both provided with adhesive paper. The two edge areas are respectively provided at the two ends of the absorption area, and adhesive paper is provided at the front center of one of the edge areas.

[0017] The beneficial effects of the present invention are:

[0018] Since the height of the raised unit strips is greater than that of the flat unit strips, gaps are formed between two adjacent raised unit strips, which facilitates the rapid penetration of menstrual blood into the interior of the sanitary napkin and prevents the menstrual blood from staying on the surface of the sanitary napkin, keeping the surface of the sanitary napkin dry. At the same time, the raised unit strips are filled with cooling fibers, which are mixed with phase change microcapsules. The phase change microcapsules contain phase change materials that can regulate the temperature of the surface of the sanitary napkin. When menstrual blood flows onto the sanitary napkin, the phase change material absorbs heat by changing its solid-liquid state, thereby reducing the temperature of the surface of the sanitary napkin, achieving a dry and cooling effect, and eliminating the stuffy and damp feeling in the user's private parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the cool surface layer sanitary napkin of the present invention;

[0020] Figure 2 Schematic diagram of the structure of the cooling surface layer of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the mold in the present invention;

[0022] In the figure: 10, base film; 11, absorption area; 12, adhesive wing; 13, edge area; 14, adhesive paper; 20, cooling surface layer; 21, skin-friendly surface layer; 211, flat unit strip; 212, raised unit strip; 22, cooling fiber; 23, water absorption hole; 30, mold; 31, filling groove; 32, air suction hole; 33, gas channel; 34, flat table. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects solved by the invention more clearly understood, the invention is further described below with reference to the accompanying drawings and embodiments.

[0024] like Figures 1 to 3 As shown, the present invention provides a sanitary napkin with a cooling surface layer, comprising a base film 10, an absorbent core and a cooling surface layer 20, the absorbent core being fixed on the base film 10, the cooling surface layer 20 being arranged on the absorbent core, the cooling surface layer 20 comprising a skin-friendly surface layer 21, the skin-friendly surface layer 21 being composed of alternating planar unit strips 211 and raised unit strips 212, the length direction of the planar unit strips 211 and the raised unit strips 212 being the length direction of the absorbent core, the bottom surface of the raised unit strips 212 being on the same plane as the planar unit strips 211, the cross-section of the raised unit strips 212 being an incomplete ellipse, the height direction of the raised unit strips 212 being the direction of the major axis of the ellipse, the height of the raised unit strips 212 being 0.7 to 0.9 of the major axis of the ellipse, and the raised unit strips 212 being filled with cooling fibers 22.

[0025] The preparation method of the cool-sensing fiber 22 includes the following steps: mixing and stirring a dispersant, water and paper fiber under ultrasound, and then beating the fiber to obtain a fiber pulp, adding phase change microcapsules to the fiber pulp and mixing them evenly to obtain a mixed pulp, obliquely meshing the mixed pulp, and then drying the mixed pulp to obtain the cool-sensing fiber 22.

[0026] Since the height of the raised unit strip 212 is greater than the height of the flat unit strip 211, a gap is formed between two adjacent raised unit strips 212. The gap facilitates the rapid penetration of menstrual blood into the interior of the sanitary napkin, preventing the menstrual blood from staying on the surface of the sanitary napkin, so that the surface of the sanitary napkin remains dry. At the same time, the raised unit strip 212 is filled with cooling fibers 22, and the cooling fibers 22 are mixed with phase change microcapsules. The phase change microcapsules contain phase change materials, which can regulate the temperature of the surface of the sanitary napkin. When menstrual blood flows onto the sanitary napkin, the phase change material absorbs heat by changing the solid-liquid state, thereby reducing the temperature of the surface of the sanitary napkin, achieving a dry and cooling effect, and eliminating the stuffy and damp feeling in the user's private parts.

[0027] When the surface temperature of the sanitary napkin drops, the phase change material releases a certain amount of heat by changing its solid-liquid state, keeping the private parts at a comfortable temperature. At the same time, the phase change material can prepare for the next heat absorption.

[0028] The core of the phase-change microcapsule is paraffin, the capsule wall is polyurethane, and the phase-change temperature of the phase-change microcapsule is 28°C.

[0029] A plurality of water absorption holes 23 are provided on the raised unit strip 212. The water absorption holes 23 are square or round, and the aperture of the water absorption holes 23 is 0.5 to 1 mm. The raised unit strip 212 is bounded by the minor axis of the ellipse. The area above the minor axis of the ellipse is recorded as the raised upper part, and the area below the minor axis of the ellipse is recorded as the raised lower part. The water absorption holes 23 are arranged in the raised lower part of the raised unit strip 212. Several water absorption holes 23 are arranged at equal intervals on the raised unit strip 212, and several water absorption holes 23 are arranged along the length direction of the raised unit strip 212.

[0030] Under the action of gravity, menstrual blood will not remain on the raised unit strips 212. Under the guidance of the arc surface of the two raised unit strips 212, the menstrual blood will preferentially flow between the two raised unit strips 212, that is, flow onto the plane unit strip 211. The water absorption holes 23 are close to the plane unit strips 211. The water absorption holes 23 can promote menstrual blood to flow from the side of the raised unit strips 212 into the raised unit strips 212, triggering the heat absorption effect of the phase change microcapsules. At the same time, compared with the skin-friendly surface layer 21, the paper fibers in the cooling fibers 22 have better hygroscopicity, and can also promote menstrual blood to flow into the raised unit strips 212 through the water absorption holes 23 and directly contact the phase change microcapsules.

[0031] The skin-friendly surface layer 21 is formed by a mold 30. The surface of the mold 30 is provided with a plurality of filling grooves 31 that match the shape and position of the raised unit strips 212. The bottom of the filling grooves 31 is provided with a plurality of suction holes 32. An air channel 33 is provided inside the mold 30. The suction holes 32 are connected to the air channel 33. The air channel 33 is externally connected to an air suction device. A flat platform 34 that matches the shape and position of the flat unit strips 211 is formed between two adjacent filling grooves 31. The mold 30 is surrounded by pressing parts.

[0032] The preparation method of the skin-friendly surface layer 21 includes the following steps: taking two pieces of skin-friendly fabrics, respectively referred to as the first fabric and the second fabric, fixing the four sides of the first fabric to the surface of the mold 30 by a pressing part, turning on the suction device, the suction device continuously sucks air, and adsorbs the first fabric into the filling groove 31 through the suction hole 32, and at the same time fills the cooling fiber 22 into the filling groove 31. When all the filling grooves 31 are filled, apply glue on the first fabric at the position of the flat table 34, align the second fabric and stick it on the first fabric, and then cut it into the desired shape to obtain the skin-friendly surface layer 21.

[0033] When the cooling fibers 22 are formed into oblique webs, they can be directly formed into long strips to avoid cutting and can be directly used for filling in the above step 3.

[0034] The ratio of the bottom width of the raised unit strip 212 to the width of the plane unit strip 211 is 1:(1.5-3.5), the bottom width of the raised unit strip 212 is (0.5-1) mm, and the minor axis length of the raised unit strip 212 is (2-2.5) mm.

[0035] The dispersant is polyvinyl alcohol, the mass ratio of the dispersant to the paper fiber is 1: (50-70), and the mass volume ratio of the paper fiber to water is 1: (300-400).

[0036] The base film 10 includes an absorption area 11, adhesive wings 12 and two edge areas 13. The absorption core is adhered to the absorption area 11. The adhesive wings 12 are fixed on both sides of the length direction of the base film 10. The back areas of the absorption area 11 and the adhesive wings 12 are provided with adhesive paper 14. The two edge areas 13 are respectively provided at the two ends of the absorption area 11, and an adhesive paper 14 is provided at the front center of one of the edge areas 13.

[0037] When the sanitary napkin is used up, it is torn off from the underwear, and the two adhesive wings 12 on both sides of the base film 10 in the length direction are pasted together. Then, the adhesive paper 14 at the center of the front of the edge area 13 is torn off, and the edge area 13 is pasted on another edge area 13. The sanitary napkin is rolled into a ball for easy disposal.

[0038] The present invention keeps the surface of the sanitary napkin dry by alternately arranging flat unit strips 211 and raised unit strips 212 on the skin-friendly surface layer 21. By filling the raised unit strips 212 with cooling fibers 22, the surface temperature of the sanitary napkin is adjusted while absorbing menstrual blood, thereby eliminating the stuffy and damp feeling in the user's private parts.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A sanitary napkin with a cool surface layer, characterized in that: The invention comprises a base film (10), an absorbent core and a cool surface layer (20), wherein the absorbent core is fixed on the base film (10), the cool surface layer (20) is arranged on the absorbent core, the cool surface layer (20) comprises a skin-friendly surface layer (21) and cool fibers (22), the skin-friendly surface layer (21) is composed of alternately arranged planar unit strips (211) and raised unit strips (212), the lengths of the planar unit strips (211) and the raised unit strips (212) are The vertical direction is the length direction of the absorbent core, the bottom surface of the raised unit strip (212) and the plane unit strip (211) are on the same plane, the cross section of the raised unit strip (212) is an incomplete ellipse, the height direction of the raised unit strip (212) is the long axis direction of the ellipse, the height of the raised unit strip (212) is 0.7 to 0.9 of the long axis of the ellipse, and the raised unit strip (212) is filled with cooling fibers (22); The cool surface layer (20) is formed by a mold (30), and a plurality of filling grooves (31) are provided on the surface of the mold (30) and the shapes and positions of the filling grooves (31) match those of the raised unit strips (212). The bottoms of the filling grooves (31) are provided with air suction holes (32), and the air suction holes (32) are connected to an air suction device. A flat platform (34) that matches the shape and position of the flat unit strips (211) is formed between two adjacent filling grooves (31), and pressing parts are provided around the mold (30); The preparation method of the cooling surface layer (20) comprises the following steps: taking two pieces of skin-friendly fabrics, respectively designated as a first fabric and a second fabric, fixing the four sides of the first fabric on the surface of a mold (30) by a pressing member, turning on an air suction device, and continuously sucking air from the air suction device to adsorb the first fabric into a filling groove (31) through an air suction hole (32), and simultaneously filling the cooling fiber (22) into the filling groove (31), and when all the filling grooves (31) are filled, applying glue on the first fabric at the position of a flat table (34), aligning and pasting the second fabric on the first fabric, and then cutting into a desired shape to obtain the skin-friendly surface layer (21); The preparation method of the cool-sensing fiber (22) comprises the following steps: mixing a dispersant, water and paper fiber under ultrasound, and then beating the mixture to obtain fiber pulp, adding phase change microcapsules into the fiber pulp and mixing them evenly to obtain a mixed pulp, forming the mixed pulp into an oblique mesh, and then drying the mixed pulp to obtain the cool-sensing fiber (22).

2. A sanitary napkin with a cool surface layer according to claim 1, characterized in that: The core of the phase-change microcapsule is paraffin, and the capsule wall is polyurethane.

3. The sanitary napkin with a cool surface layer according to claim 1, characterized in that: A plurality of water absorption holes (23) are provided on the raised unit strip (212), the water absorption holes (23) are square or circular, and the diameter of the water absorption holes (23) is 0.5-1 mm.

4. A sanitary napkin with a cool surface layer according to claim 3, characterized in that: The raised unit strip (212) is bounded by the minor axis of the ellipse, the area above the minor axis of the ellipse is recorded as the raised upper part, and the area below the minor axis of the ellipse is recorded as the raised lower part; the water absorption hole (23) is provided in the raised lower part of the raised unit strip (212).

5. The sanitary napkin with a cool surface layer according to claim 3, characterized in that: The plurality of water absorption holes (23) are arranged at equal intervals on the raised unit strip (212), and the plurality of water absorption holes (23) are arranged along the length direction of the raised unit strip (212).

6. The sanitary napkin with a cool surface layer according to claim 1, characterized in that: The ratio of the bottom width of the raised unit strip (212) to the width of the plane unit strip (211) is 1:(1.5-3.5), the bottom width of the raised unit strip (212) is 0.5-1 mm, and the short axis length of the raised unit strip (212) is 2-2.5 mm.

7. The sanitary napkin with a cool surface layer according to claim 1, characterized in that: The dispersant is polyvinyl alcohol, and the mass ratio of the dispersant to the paper fiber is 1:(50-70).

8. The sanitary napkin with a cool surface layer according to claim 1, characterized in that: The base film (10) comprises an absorption area (11), adhesive wings (12) and two edge areas (13); the absorption core is adhered to the absorption area (11); the adhesive wings (12) are fixedly arranged on both sides of the length direction of the base film (10); adhesive paper (14) is provided on the back areas of the absorption area (11) and the adhesive wings (12); the two edge areas (13) are respectively arranged at the two ends of the absorption area (11); and an adhesive paper (14) is provided at the center of the front side of one of the edge areas (13).

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