Sanitary towel with cool surface layer

Abstract

The invention discloses a sanitary napkin with a cool-feeling surface layer, which relates to the technical field of hygienic products, and comprises a bottom film, an absorption core body and the cool-feeling surface layer, the absorption core body is fixed on the bottom film, the cool-feeling surface layer is arranged on the absorption core body, the cool-feeling surface layer comprises a skin-friendly surface layer, and the skin-friendly surface layer is composed of plane unit strips and convex unit strips which are alternately arranged. The plane unit strips and the protruding unit strips are arranged in the length direction of the absorption core body, the bottom faces of the protruding unit strips and the plane unit strips are located on the same plane, the cross section of each protruding unit strip is in an incomplete oval shape, the height direction of each protruding unit strip is the long axis direction of the oval, and the height of each protruding unit strip is 0.7-0.9 of the long axis of the oval. The convex unit strips are filled with cool fibers, and the sanitary towel with the cool surface layer can eliminate stuffiness and damp feelings of private parts of a user.

Description

Technical Field

[0001] The 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 wet, which is not a good experience when using it. Summary of the invention

[0003] In view of the defects of the prior art, the present invention aims 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 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 on the base film, the cooling surface layer is arranged on the absorbent core, the cooling surface layer comprises a skin-friendly surface layer, the skin-friendly surface layer is composed of alternately arranged plane unit strips and raised unit strips, the length direction of the plane 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 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 long axis direction of the ellipse, the height of the raised unit strips is 0.7 to 0.9 of the long axis of the ellipse, and the raised unit strips are filled with cooling fibers;

[0006] The preparation method of the cold-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 mesh forming the mixed pulp, and then drying the mixed pulp to obtain the cold-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, the water absorption holes are square or circular, and the hole diameter of the water absorption holes is 0.5-1 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 arranged 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, a plurality of filling grooves matching the shape and position of the raised unit strips are provided on the surface of the mold, an air suction hole is provided at the bottom of the filling groove, an air suction device is connected to the air suction hole, a flat platform matching the shape and position of the flat unit strips is formed between two adjacent filling grooves, and a pressing piece is provided around the mold;

[0012] The preparation method of the cool surface layer comprises the following steps: taking two pieces of skin-friendly fabrics, which are respectively recorded as the first fabric and the second fabric, fixing the four sides of the first fabric on the surface of the mold by means of pressing parts, turning on the suction device, the suction device continuously sucks air, and adsorbs the first fabric in the filling groove through the suction hole, and at the same time fills the cool fiber in the filling groove, when all the filling grooves are filled, applying glue on the first fabric at the flat table position, aligning the second fabric and pasting it on the first fabric, and then cutting it into a 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 minor 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, an adhesive wing 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 provided with adhesive paper. The two edge areas are respectively arranged at both 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 plane unit strips, a gap is formed between two adjacent raised unit strips, which facilitates menstrual blood to quickly penetrate into the interior of the sanitary napkin and prevents menstrual blood from staying on the surface of the sanitary napkin, thereby 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 the solid-liquid state, thereby lowering the temperature of the surface of the sanitary napkin, achieving a dry and cooling effect and eliminating the stuffy and humid feeling in the user's private parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 2 is a schematic structural diagram of a cool surface layer sanitary napkin of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the cool feeling surface layer in 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, cool surface layer; 21, skin-friendly surface layer; 211, flat unit strip; 212, raised unit strip; 22, cool 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 in conjunction with 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, wherein the absorbent core is fixed on the base film 10, and the cooling surface layer 20 is arranged on the absorbent core, and the cooling surface layer 20 comprises a skin-friendly surface layer 21, and the skin-friendly surface layer 21 is composed of alternately arranged plane unit strips 211 and raised unit strips 212, wherein the length direction of the plane unit strips 211 and the raised unit strips 212 is the length direction of the absorbent core, the bottom surface of the raised unit strip 212 is on the same plane as the plane unit strip 211, the cross-section of the raised unit strip 212 is an incomplete ellipse, the height direction of the raised unit strip 212 is the direction of the major axis of the ellipse, the height of the raised unit strip 212 is 0.7 to 0.9 of the major axis of the ellipse, and the raised unit strip 212 is filled with cooling fibers 22.

[0025] The preparation method of the cool feeling fiber 22 includes the following steps: mixing and stirring the 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 mixed pulp, oblique mesh forming the mixed pulp, and then drying the mixed pulp to obtain the cool feeling fiber 22.

[0026] Since the height of the raised unit strip 212 is greater than the height of the plane unit strip 211, a gap is formed between two adjacent raised unit strips 212. The gap facilitates menstrual blood to quickly penetrate into the interior of the sanitary napkin and prevents menstrual blood from staying on the surface of the sanitary napkin, thereby keeping the surface of the sanitary napkin dry. At the same time, the raised unit strip 212 is filled with cooling fibers 22. The cooling fibers 22 are mixed with phase change microcapsules. The phase change microcapsules contain phase change materials. The phase change materials 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 humid feeling in the user's private parts.

[0027] When the surface temperature of the sanitary napkin becomes low, 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 circular, 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. A plurality of water absorption holes 23 are arranged at equal intervals on the raised unit strip 212, and a plurality of 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 the 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 the 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. A gas channel 33 is provided inside the mold 30. The suction holes 32 are connected to the gas channel 33. The gas channel 33 is externally connected with a 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. Pressing parts are provided around the mold 30.

[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 means of a pressing piece, 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, applying glue on the first fabric at the position of the flat table 34, aligning the second fabric and pasting it on the first fabric, and then cutting it into a desired shape to obtain the skin-friendly surface layer 21.

[0033] When the cold feeling fibers 22 are formed in the oblique web, 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 arranged at both 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, tear it off from the underwear, stick the two adhesive wings 12 on both sides of the length direction of the base film 10 together, then tear off the adhesive paper 14 at the center of the front side of the edge area 13, stick the edge area 13 to another edge area 13, and 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, and fills the raised unit strips 212 with cooling fibers 22 to achieve the effect of absorbing menstrual blood while achieving the effect of regulating the temperature of the surface of the sanitary napkin, thereby eliminating the stuffy and humid 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 substitutions and improvements made within the spirit and principles of the present invention shall fall within the protection scope 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) being 1.3mm and 1.5mm, respectively. The convex unit strip (212) has a longitudinal direction that is the longitudinal direction of the absorbent core, the bottom surface of the convex unit strip (212) and the plane unit strip (211) are on the same plane, the cross section of the convex unit strip (212) is an incomplete ellipse, the height direction of the convex unit strip (212) is the direction of the major axis of the ellipse, the height of the convex unit strip (212) is 0.7 to 0.9 of the major axis of the ellipse, and the convex unit strip (212) is filled with cooling fibers (22); The preparation method of the cold-sensitive fiber (22) 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 them evenly to obtain a mixed pulp, oblique mesh forming the mixed pulp, and then drying the mixed pulp to obtain the cold-sensitive 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. A 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 to 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. A 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. A sanitary napkin with a cool surface layer according to claim 1, characterized in that: The cool feeling surface layer (20) is formed by processing with a mold (30); a plurality of filling grooves (31) whose shapes and positions match those of the raised unit strips (212) are formed on the surface of the mold (30); an air suction hole (32) is formed at the bottom of the filling grooves (31); the air suction hole (32) is connected to an air suction device; a flat platform (34) whose shape and position match those 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 referred to as a first fabric and a second fabric, fixing the first fabric on the surface of a mold (30) by means of a pressing piece, turning on an air suction device, and continuously sucking air through the air suction device to absorb 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); when all the filling grooves (31) are filled, applying glue to the first fabric at the position of the flat table (34), aligning the second fabric and pasting it on the first fabric, and then cutting it into a desired shape to obtain the skin-friendly surface layer (21).

7. A 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.

8. 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).

9. A sanitary napkin with a cool surface layer according to claim 1, characterized in that: The mass volume ratio of the paper fiber to the water is 1:(300-400).

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

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