阅读说明：本技术 一种含有中凸芯体的卫生巾及其制备方法 (Sanitary towel containing convex core and preparation method thereof ) 是由 黄翠玉 戴灵 于 2020-11-30 设计创作，主要内容包括：本发明涉及卫生用品技术领域,提供一种含有中凸芯体的卫生巾及其制备方法,包括卫生巾本体,所述卫生巾本体包括由上到下叠层设置的透液性面层、传输层、中凸芯体、防漏底层,所述中凸芯体由上到下包括第一吸收层、中凸吸收层和第二吸收层,所述中凸吸收层包括中凸区域和非中凸区域,所述中凸区域的绒毛浆吸收体质量和非中凸区域的绒毛浆吸收体质量比大于3:1,所述中凸区域上的绒毛浆吸收体外包裹有吸水纸,所述中凸芯体上设有缝隙,所述缝隙贯穿中凸芯体,所述透液性面层上设有外圈导流槽和直条导流槽,所述透液性面层上设有渗透孔。其解决了现有技术卫生巾对经血的渗透吸收速度慢,难以保证卫生巾表面的干爽,以及容易发生侧漏和后漏的问题。(The invention relates to the technical field of sanitary products, and provides a sanitary towel containing a convex core body and a preparation method thereof, wherein the sanitary towel comprises a sanitary towel body, the sanitary towel body comprises a liquid-permeable surface layer, a transmission layer, the convex core body and a leakage-proof bottom layer which are arranged in a stacking manner from top to bottom, the convex core body comprises a first absorption layer, a convex absorption layer and a second absorption layer from top to bottom, the convex absorption layer comprises a convex region and a non-convex region, the mass ratio of a fluff pulp absorption body in the convex region to a fluff pulp absorption body in the non-convex region is greater than 3:1, absorbent paper is wrapped outside the fluff pulp absorption body in the convex region, a gap is arranged on the convex core body and penetrates through the convex core body, an outer ring diversion trench and a straight strip diversion trench are arranged on the liquid-permeable surface layer, and a penetration hole is arranged on the liquid-permeable surface layer. The sanitary towel solves the problems that the sanitary towel in the prior art is low in menstrual blood permeation and absorption speed, the surface of the sanitary towel is difficult to ensure to be dry, and side leakage and back leakage are easy to occur.)

1. The utility model provides a sanitary towel that contains convex core, includes the sanitary towel body, and what the definition extended along sanitary towel body length direction is vertical, and what extended along sanitary towel body width direction is horizontal, its characterized in that: the sanitary napkin comprises a sanitary napkin body and is characterized in that the sanitary napkin body comprises a liquid-permeable surface layer, a transmission layer, a convex core body and a leakage-proof bottom layer which are sequentially stacked from top to bottom, the convex core body comprises a first absorption layer and a second absorption layer positioned below the first absorption layer, a convex absorption layer is arranged between the first absorption layer and the second absorption layer and comprises a convex region and a non-convex region, the convex region is positioned in the middle of the convex absorption layer and corresponds to the position of a menstrual blood excretion opening of a user, the convex absorption layer is a fluff pulp absorption body containing SAP, the mass ratio of the fluff pulp absorption body in the convex region to the fluff pulp absorption body in the non-convex region is greater than 3:1, absorbent paper is wrapped outside the fluff pulp absorption body in the convex region and is of an e-shaped folding structure, and the absorbent paper is divided into a first absorbent paper layer from top to bottom, The second floor paper and the third layer paper that absorbs water, be equipped with the gap on the well protruding core, the gap runs through the well protruding core, the gap is 0 ~ 40 with fore-and-aft contained angle, be equipped with outer lane guiding gutter and vertical bar guiding gutter on the liquidity surface course, the week edge on liquidity surface course is located to the outer lane guiding gutter, the middle part on liquidity surface course is located to the vertical bar guiding gutter, be equipped with the infiltration hole on the liquidity surface course, the infiltration hole runs through liquidity surface course, transmission layer, well protruding core.

2. A sanitary napkin having a convex core according to claim 1, wherein: the first and second absorbent layers are made of a water-absorbent material.

3. A sanitary napkin having a convex core according to claim 1, wherein: the length of the gap is 4-50 mm, and the width is 0.2-3 mm.

4. A sanitary napkin having a convex core according to claim 1, wherein: the depth of the outer ring diversion trench is 0.3-0.7 mm, and the depth of the straight diversion trench is 0.1-0.5 mm.

5. A sanitary napkin having a convex core according to claim 4, wherein: the length of the straight diversion trench is 5-20 mm, and the width of the straight diversion trench is 0.5-2.5 mm.

6. A sanitary napkin having a convex core according to claim 1, wherein: the included angle between the straight guide groove and the longitudinal direction is 0-15 degrees.

7. A sanitary napkin having a convex core according to claim 1, wherein: the penetration hole is funnel-shaped, and the maximum diameter is 0.5-2.5 mm.

8. A method of making a sanitary napkin containing a convex core according to claim 1, wherein: the preparation method comprises the following steps of preparing a sanitary towel body:

(1) compounding the first absorption layer, the convex absorption layer and the second absorption layer to form a convex core body, then vertically cutting the convex core body, and cutting downwards from the upper surface of the first absorption layer to penetrate through the whole convex core body to form a gap;

(2) the convex core body is compounded with the transmission layer and the liquid-permeable surface layer, then the composite material is punctured through a pressure area between a licker-in roll and a bottom roll to form a penetration hole, the outer surface of the licker-in roll is provided with pricking pins which are arranged at equal intervals, the bottom roll is provided with a concave part matched with the pricking pins, then the outer ring of the liquid-permeable surface layer is pressed by a diversion trench, and the middle part of the liquid-permeable surface layer is pressed by a straight diversion trench;

(3) and (3) compounding the semi-finished product obtained in the step (2) with a leakage-proof bottom layer to obtain the sanitary towel body.

9. A method of making a sanitary napkin having a convex core according to claim 8, wherein: the pricking pin is 2-6 mm in length, and the pricking pin cone angle is 15-45 degrees.

10. A method of making a sanitary napkin having a convex core according to claim 8, wherein: the concave parts are hollowed strips or hollowed holes, the hollowed strips are grooves penetrating through two sides of the bottom roller, and the hollowed holes are arranged on the bottom roller at equal intervals.

Technical Field

The invention relates to the technical field of sanitary products, in particular to a sanitary towel containing a convex core body and a preparation method thereof.

Background

The existing plane sanitary towel sold in the market has certain defects, for example, the sanitary towel can not be attached to the human body menstrual blood excretion port in the using process of a consumer, and menstrual blood can not be absorbed in time when tidal surge occurs, so that side leakage is caused; for another example, the flat sanitary napkin is not reinforced at the position corresponding to the position of the menstrual blood excretion, and the speed of the menstrual blood permeating and diffusing downwards from the surface layer of the sanitary napkin and being absorbed is limited, which can not meet the requirements of consumers for the dryness and comfort of the sanitary napkin product. Chinese patent application No.: 201720013258.4 discloses a novel sanitary towel absorber, from top to bottom superimposed well protruding water conservancy diversion layer in proper order, main absorbed layer and leak protection layer constitute, well protruding water conservancy diversion layer is located the middle part of main absorbed layer and upwards protruding, the rear end on leak protection layer is the fan-shaped setting of expansion, the bottom of main absorbed layer is covered to leak protection layer, it has the water conservancy diversion resin polymer to add in the well protruding water conservancy diversion layer, it has the resin polymer that absorbs water to add in the main absorbed layer, the tight private department of laminating of well protruding water conservancy diversion layer, the water conservancy diversion resin polymer guides the menstruation blood to ooze down fast, the infiltration absorption of menstruation blood is ensured to the water absorption resin polymer in the main absorbed layer, guarantee the dry and comfortable of private department, the rear end all-round side leakage and the back leak of the leak protection layer of fan-shaped setting, avoid causing women. The sanitary napkin improves the infiltration speed of menstrual blood and improves the dryness of the surface of the sanitary napkin, but the absorption speed and the absorption amount of the menstrual blood are not obviously increased.

Chinese patent application No.: 201520492622.0 discloses a sanitary napkin, comprising a skin-friendly surface layer, a water-impermeable back layer and an absorbent core therebetween, wherein the absorbent core comprises a convex central convex part at the middle part and concave parts at both sides; the skin-friendly surface layer covers the upper end face of the groove part to form a hollow flow guide groove. The sanitary towel absorbs the middle part protrusion of core, and the cavity water conservancy diversion recess absorption rate that is darker in well convex part both sides is fast, can absorb the menses in the twinkling of an eye and upwards down left and right diffusion, prevents the emergence of the side leakage condition effectively, prevents that the side leakage is effectual. The absorption core body containing the middle convex part in the market at present mainly comprises the following two materials: the middle of the absorption core body made of the SAP fluff pulp is thick, so that the SAP or pure absorbent paper is not favorable for ventilation and is limited by the forming process level of the fluff pulp on steps of the existing sanitary towel production equipment, the mass ratio of the fluff pulp of the convex part to the fluff pulp of other areas of the absorption core body is about 1.5-3: 1, the mass ratio is difficult to exceed 3:1, otherwise, the convex part is easy to deform. The thickness of the absorption core body made of pure absorbent paper is reasonable, but the whole product is hard, the use comfort is not good, and the absorption speed of the product to menstrual blood is slow.

Disclosure of Invention

Therefore, in view of the above, the present invention provides a sanitary napkin with a convex core, which solves the problems that the sanitary napkin in the prior art has a slow absorption speed for menstrual blood penetration, is difficult to ensure the dryness of the surface of the sanitary napkin, has insufficient absorption capacity, is difficult to effectively absorb and lock when a large amount of menstrual blood is discharged, and is easy to cause side leakage and back leakage.

It is another object of the present invention to provide a method of making a sanitary napkin having a convex core.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a sanitary towel containing a convex core body comprises a sanitary towel body, wherein the longitudinal direction of the sanitary towel body is defined to extend along the length direction, the transverse direction of the sanitary towel body extends along the width direction, the sanitary towel body comprises a liquid-permeable surface layer, a transmission layer, a convex core body and a leakage-proof bottom layer which are sequentially stacked from top to bottom, the convex core body comprises a first absorption layer and a second absorption layer positioned below the first absorption layer, a convex absorption layer is arranged between the first absorption layer and the second absorption layer, the convex absorption layer comprises a convex area and a non-convex area, the convex area is positioned in the middle of the convex absorption layer, the convex area corresponds to the position of a menstrual blood excretion opening of a user, the convex absorption layer is a fluff pulp absorption body containing SAP, the mass ratio of the fluff pulp absorption body of the convex area to the fluff pulp absorption body of the non-convex area is greater than 3:1, the outer parcel of the fluff pulp absorber on the convex region has the paper that absorbs water, the paper that absorbs water is e shape beta structure, the paper that absorbs water is by last to divide into first layer paper that absorbs water, second floor paper that absorbs water and third layer paper that absorbs water down, be equipped with the gap on the convex core body, the gap runs through the convex core body, the gap is 0 ~ 40 with fore-and-aft contained angle, be equipped with outer lane guiding gutter and vertical bar guiding gutter on the liquid permeability surface course, the week edge of liquid permeability surface course is located to the outer lane guiding gutter, the middle part of liquid permeability surface course is located to the vertical bar guiding gutter, be equipped with the infiltration hole on the liquid permeability surface course, the infiltration hole runs through liquid permeability surface course, transmission layer, convex core body.

The further improvement is that: the first and second absorbent layers are made of a water-absorbent material.

The further improvement is that: the length of the gap is 4-50 mm, and the width is 0.2-3 mm.

The further improvement is that: the depth of the outer ring diversion trench is 0.3-0.7 mm, and the depth of the straight diversion trench is 0.1-0.5 mm.

The further improvement is that: the length of the straight diversion trench is 5-20 mm, and the width of the straight diversion trench is 0.5-2.5 mm.

The further improvement is that: the included angle between the straight guide groove and the longitudinal direction is 0-15 degrees.

The further improvement is that: the penetration hole is funnel-shaped, and the maximum diameter is 0.5-2.5 mm.

The invention also provides a preparation method of the sanitary towel containing the convex core, which comprises the preparation of the sanitary towel body, wherein the preparation steps of the sanitary towel body are as follows:

(1) compounding the first absorption layer, the convex absorption layer and the second absorption layer to form a convex core body, then vertically cutting the convex core body, and cutting downwards from the upper surface of the first absorption layer to penetrate through the whole convex core body to form a gap;

(2) the convex core body is compounded with the transmission layer and the liquid-permeable surface layer, then the composite material is punctured through a pressure area between a licker-in roll and a bottom roll to form a penetration hole, the outer surface of the licker-in roll is provided with pricking pins which are arranged at equal intervals, the bottom roll is provided with a concave part matched with the pricking pins, then the outer ring of the liquid-permeable surface layer is pressed by a diversion trench, and the middle part of the liquid-permeable surface layer is pressed by a straight diversion trench;

(3) and (3) compounding the semi-finished product obtained in the step (2) with a leakage-proof bottom layer to obtain the sanitary towel body.

The further improvement is that: the pricking pin is 2-6 mm in length, and the pricking pin cone angle is 15-45 degrees.

The further improvement is that: the concave parts are hollowed strips or hollowed holes, the hollowed strips are grooves penetrating through two sides of the bottom roller, and the hollowed holes are arranged on the bottom roller at equal intervals.

By adopting the technical scheme, the invention has the beneficial effects that:

through the arrangement of the convex core body, the sanitary towel is more attached, the infiltration absorption speed of the sanitary towel to menstrual blood is improved, the menstrual blood is absorbed in time when tidal surge occurs, the dryness of the surface of the sanitary towel is ensured, and side leakage or back leakage is avoided. The convex absorption layer is arranged on the convex core body and is divided into a convex area and a non-convex area, the convex area corresponds to the position of the menstrual blood excretion opening of a user, the existing equipment process is not required to be upgraded and improved, the mass ratio of the fluff pulp absorber in the convex area to the fluff pulp absorber in the non-convex area can be larger than 3:1 on the premise that the sanitary towel is not easy to break and deform, and the absorption capacity of menstrual blood is effectively improved. The absorbent paper is characterized in that the fluff pulp absorber on the convex area is wrapped by the e-shaped folded absorbent paper, the fluff pulp absorber can be well wrapped by the e-shaped folded absorbent paper, the common phenomena of caking, fracture and deformation in the prior art are avoided in the using process, and the structure is stable.

Through carrying out the vertical cut to the convex core body and forming the gap, the setting up of gap can not destroy convex core body structural wholeness, nevertheless can destroy its rigidity, has improved the compliance of convex core body. In addition, the gaps also improve the shuttling capability of gas from the surface layer to the bottom layer, and the air permeability of the product is enhanced; the gaps can also accelerate the permeation speed of menstrual blood, and the menstrual blood is quickly absorbed and locked by the convex core body, so that the stuffiness and the damp feeling of the surface layer of the sanitary towel are greatly reduced.

Through the arrangement of the outer ring diversion trench and the straight diversion trench, the probability of side leakage and back leakage of menstrual blood is reduced. When menstrual blood flows through the straight diversion grooves, the menstrual blood extends and diffuses along the longitudinal direction of the straight diversion grooves and permeates downwards to be absorbed by the convex core body, so that the utilization rate of the convex core body is improved.

The permeable holes sequentially penetrate through the liquid permeable surface layer, the transmission layer and the convex core body, so that the air permeability of the product can be increased, the menstrual blood can be rapidly infiltrated into the convex core body along the permeable holes, and the damp feeling caused by overlong retention time of the menstrual blood on the liquid permeable surface layer is avoided. In addition, the penetration holes can reduce the rigidity and the strength of the product and increase the softness of the product. Furthermore, the permeation holes are arranged in a funnel shape, so that the reverse osmosis of menstrual blood when the menstrual blood is squeezed by external force can be effectively inhibited.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of A of FIG. 1;

FIG. 3 is a sectional view of a sanitary napkin body in the embodiment;

FIG. 4 is a schematic structural view of a convex core in the embodiment;

FIG. 5 is a schematic structural view of a takerin and a base roller in an embodiment;

FIG. 6 is a schematic structural view of a hollow bar in the embodiment;

fig. 7 is a schematic view of a structure of a prior art recess.

Detailed Description

The following detailed description will be provided for the embodiments of the present invention with reference to specific embodiments, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.

Unless otherwise indicated, the techniques employed in the examples are conventional and well known to those skilled in the art, and the reagents and products employed are also commercially available. The source, trade name and if necessary the constituents of the reagents used are indicated at the first appearance.

Examples

Referring to fig. 1 to 4, a sanitary napkin having a convex core comprises a sanitary napkin body 1, wherein the longitudinal direction of the sanitary napkin body 1 is defined to extend along the length direction, the transverse direction of the sanitary napkin body 1 is defined to extend along the width direction, two sides of the sanitary napkin body 1 are provided with side flaps 2, the bottoms of the side flaps 2 are provided with a back glue (not shown in the figure), the sanitary napkin body 1 comprises a liquid permeable surface layer 3, a transmission layer 4, a convex core 5 and a leakage-proof bottom layer 6 which are sequentially stacked from top to bottom, the transmission layer 4 is a hot air non-woven fabric, the leakage-proof bottom layer 6 is formed by compounding a PE film and a water-repellent non-woven fabric, the convex core 5 comprises a first absorption layer 7 and a second absorption layer 7 which is positioned below the first absorption layer 8, the first absorption layer 7 and the second absorption layer 8 are made of water-absorbent material, in this embodiment, dust-free paper is provided, the convex absorption layer is arranged between the first absorption layer 7 and the second absorption layer, the middle convex absorption layer comprises a middle convex area 9 and a non-middle convex area 10, the middle convex area 9 is positioned in the middle of the middle convex absorption layer, the middle convex area 9 corresponds to the position of a menstrual blood excretion opening of a user, the middle convex absorption layer is a fluff pulp absorption body containing SAP, the mass ratio of the fluff pulp absorption body of the middle convex area 9 to the fluff pulp absorption body of the non-middle convex area 10 is 5:1, absorbent paper is wrapped outside the fluff pulp absorption body on the middle convex area 9 and is of an e-shaped folding structure, the absorbent paper is divided into a first layer of absorbent paper 11, a second layer of absorbent paper 12 and a third layer of absorbent paper 13 from top to bottom, a gap 14 is arranged on the middle convex core body 5, the gap 14 penetrates through the middle convex core body 5, an outer ring flow guide groove 15 and a straight strip flow guide groove 16 are arranged on the liquid permeable surface layer 3, the outer ring flow guide groove 15 is arranged on the periphery of the liquid permeable surface layer 3, the middle part of liquid permeability surface course 3 is located to straight strip guiding gutter 16, be equipped with the infiltration hole 17 that leaks hopper-shaped on the liquid permeability surface course 3, infiltration hole 17 runs through liquid permeability surface course 3, transmission layer 4, the convex core body 5, and the maximum diameter of infiltration hole 17 is 2.5 mm.

A preparation method of a sanitary towel with a convex core body comprises the following steps of preparing a sanitary towel body:

(1) compounding the first absorption layer, the convex absorption layer and the second absorption layer to form a convex core body, then vertically cutting the convex core body, and cutting downwards from the upper surface of the first absorption layer to penetrate through the whole convex core body to form a gap;

(2) the convex core body is compounded with the transmission layer and the liquid-permeable surface layer, then the punching is carried out through a pressing area between the licker-in roll and the bottom roll to form a penetration hole, then the outer ring diversion trench pressing is carried out on the periphery of the liquid-permeable surface layer, and the straight diversion trench is pressed in the middle of the liquid-permeable surface layer;

referring to fig. 5 and 6, the outer surface of the spike roller 18 is provided with equally spaced spikes 20, the bottom roller 19 is provided with recesses 21 which are matched with the spikes 20, the recesses 21 are hollowed strips, and the hollowed strips are grooves which penetrate through two sides of the bottom roller.

(3) And (3) compounding the semi-finished product obtained in the step (2) with a leakage-proof bottom layer to obtain the sanitary towel body.

The length of the gap is 4-50 mm, and the width of the gap is 0.2-3 mm. The gap and the longitudinal included angle are 0-40 degrees. In the embodiment, the length of the gap is 15mm, the width of the gap is 0.2mm, and the included angle between the gap and the longitudinal direction is 0 degree.

The depth of the outer ring diversion trench is 0.3-0.7 mm, the depth of the straight diversion trench is 0.1-0.5 mm, the length of the straight diversion trench is 5-20 mm, the width of the straight diversion trench is 0.5-2.5 mm, and the included angle between the straight diversion trench and the longitudinal direction is 0-15 degrees. In this embodiment, the depth of the outer ring guide groove is 0.3mm, the depth of the straight guide groove is 0.3mm, the length of the straight guide groove is 10mm, the width of the straight guide groove is 1.5mm, and the included angle between the straight guide groove and the longitudinal direction is 0 °.

The length of the pricker on the licker-in roller is 2-6 mm, and the cone angle of the pricker is 15-45 degrees. The lancet in this embodiment is 4mm in length and the lancet cone angle is 15. The convex core body, the transmission layer and the liquid-permeable surface layer are compounded and then enter between the licker-in roller and the bottom roller, the felting needles on the licker-in roller penetrate into the hollowed strips of the bottom roller from the liquid-permeable surface layer, at the moment, the non-hollowed strip areas of the licker-in roller base and the bottom roller clamp the sanitary towel so that the sanitary towel is not displaced, the licker-in roller and the bottom roller continue to rotate, and the felting needles are pulled out from the surface layer of the sanitary towel. The positions of the bottom rollers corresponding to the felting needles are provided with the hollowed holes as concave parts, the structure of the hollowed holes 22 is shown in fig. 7, when the production speed is unstable or the sanitary towel product is thicker, the felting needles and the hollowed holes are slightly staggered, and when the felting needles are pulled out, the felting needles are easy to rub against the walls of the hollowed holes, so that the smoothness of the permeation holes is influenced, and barbs or fine fibers are left on the product. The bottom roller is provided with the grooves penetrating through the two sides of the bottom roller as the concave parts, the felting needles can not generate friction with the hollowed strips, the production is easy to control, and the permeation holes are smoother and clearer.

The sanitary napkins prepared in the examples were subjected to performance tests of water absorption capacity and absorption rate, and the test method referred to GB/T8939-2018, "sanitary napkins (panty liners)".

And (3) testing results: the water absorption rate of the convex core body is 52 times, the absorption speed is 29s, and compared with a sanitary towel product without gaps, the absorption speed is improved by 15%.

The above description is only an embodiment utilizing the technical content of the present disclosure, and any modification and variation made by those skilled in the art can be covered by the claims of the present disclosure, and not limited to the embodiments disclosed.