Menstrual pants and process for their production

Abstract

The application relates to the field of sanitary products, and provides a menstruation pant and a production process thereof, which solve the problems of poor comfort, dryness and relatively poor anti-back seepage performance of the existing menstruation pant. The menstruation pant comprises a main absorption area and a connecting area, the connecting area is arranged at both ends of the main absorption area to form a ring-shaped waist, the main absorption area comprises, from top to bottom, a skin-friendly layer, a flow guide layer, a double-layer absorption core and a water isolation layer; a groove is arranged at a crotch position of the skin-friendly layer, the flow guide layer is provided with a circular groove corresponding to the bottom of the groove; the flow guide layer is further provided with an opening corresponding to the position of the circular groove; the double-layer absorption core comprises a wood pulp absorption layer at the upper layer and a high polymer absorption layer at the lower layer, a plurality of equidistantly distributed antibacterial strips are arranged between the wood pulp absorption layer and the high polymer absorption layer, and the gap between the antibacterial strips is 3mm-10mm; the antibacterial strip is formed by two layers of nanofiber membranes clamping antibacterial microcapsule particles.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sanitary products, in particular to a period pants and a production process thereof. BACKGROUND

[0002] Although traditional period pants have solved the problem of easy displacement of sanitary napkins to some extent, there is still room for improvement in overall design and performance. The absorption structure of some traditional period pants is not reasonable, and the absorption speed is slow, which cannot quickly and effectively absorb a large amount of menstrual blood, easily leading to residual menstrual blood on the surface and increasing the risk of back seepage. At the same time, the performance in antibacterial and odor prevention is not good, the private part environment of women during menstruation is humid, which provides favorable conditions for the growth of bacteria, and traditional period pants cannot effectively inhibit the growth of bacteria, easily producing odor, affecting the life quality and self-confidence of women.

[0003] Chinese Patent Publication No. CN113274197A discloses a period pants, which includes a body, the body includes a surface layer arranged on the surface, the first surface of the surface layer of the body is in contact with the skin of the human body, an antibacterial layer is arranged in the surface layer, the antibacterial layer penetrates any position of the surface layer, the antibacterial layer contains at least one of silver ions, organic guanidine, and quaternary ammonium salt, i.e. the antibacterial layer can include one of them, any two of them, or all of them. Among them, the three products are all positive ions, which undergo oxidation-reduction reaction to kill microorganisms and avoid microbial derivation. In this way, the antibacterial layer arranged in the surface layer can kill microorganisms well, avoid bacterial growth, prevent odor production, and protect women's health. However, the antibacterial layer of silver ions arranged in the surface layer directly contacts the skin, which may have the risk of heavy metal residue, and the safety performance is relatively insufficient.

[0004] Chinese Patent Publication No. CN222983271U discloses a leakage-proof period pants, which includes a penetration layer, a lower infiltration layer, an absorption layer, and a diffusion layer sequentially attached together from top to bottom. The porosities of the penetration layer, the lower infiltration layer, the absorption layer, and the diffusion layer are sequentially set from high to low. The leakage-proof period pants disclosed in the application can make the menstrual blood from top to bottom, layer by layer, maximize the diffusion of the menstrual blood to the full length of the core bottom, increase the utilization rate of the core, and avoid the concentration of the menstrual blood in the middle part of the absorption body, causing liquid leakage. However, the absorption layer of the period pants of the application is a single layer structure of fluff pulp or cotton fiber, and its liquid absorption, water locking, and anti-back seepage performance are relatively poor at night. The material of the penetration layer is non-woven fabric, which is not comfortable and dry. SUMMARY

[0005] Therefore, aiming at the above problems, the present application provides a period pants and its production process, solves the problem of the existing period pants, such as the lack of comfort and dryness, the relatively poor liquid absorption, water locking and anti reverse osmosis performance, and the lack of antibacterial safety.

[0006] To achieve the above object, the present application adopts the following technical solutions:

[0007] A period pants, comprising a main absorption area and a connecting area, the connecting area is arranged at both ends of the main absorption area to form a ring-shaped waist, the main absorption area comprises a skin-friendly layer, a flow guide layer, a double-layer absorption core and a water barrier layer arranged in sequence from top to bottom, a groove is arranged at the crotch position of the skin-friendly layer, a circular groove is arranged at the bottom of the groove corresponding to the flow guide layer, and an opening is arranged at the position corresponding to the circular groove in the flow guide layer, the double-layer absorption core comprises a wood pulp absorption layer and a high polymer absorption layer, a plurality of equally distributed antibacterial strips are arranged between the wood pulp absorption layer and the high polymer absorption layer, the gap between the antibacterial strips is 3-10 mm, the antibacterial strip is formed by two layers of nanofiber membranes clamping antibacterial microcapsule particles, and the preparation process of the antibacterial microcapsule particles is as follows: β-cyclodextrin is dissolved in water, sophoridine powder is added, and the mixture is stirred uniformly at 55-60 DEG C, and then spray drying is carried out to obtain microcapsule particles.

[0008] Further, the depth of the circular groove is 1 / 3-1 / 2 of the thickness of the flow guide layer, and the width of the circular groove is 1:1.5-3 of the width of the groove.

[0009] Further, the skin-friendly layer is composed of first fibers and second fibers, the first fibers are cotton fibers, the second fibers are any one of modal fibers, lyocell fibers or soybean protein fibers, and the mass ratio of the first fibers to the second fibers is 3-5:1.

[0010] Further, the initial reverse osmosis performance of the period pants is △G1, when testing the reverse osmosis performance, the main absorption area of the period pants is flattened and fixed, the center point of the groove of the skin-friendly layer is aligned with the center of the lower mouth of the permeation tester, the lower mouth of the funnel is 5-10 mm away from the surface of the groove, 5.0 mL of test liquid is injected at a flow rate of 2.0 mL / s to the center point of the groove, and the complete absorption time T is recorded; 20 seconds after the absorption is completed, 10 layers of Ф9 medium-speed filter paper are covered on the surface of the groove, a pressure of 153 Pa is applied for 1 minute, the mass of the filter paper before absorption is m1, the mass of the filter paper after absorption is m2, and △G1=m2-m1; wherein, the △G1≤0.5 g.

[0011] Further, the saturation reverse osmosis performance of the period pants is △G2, in the reverse osmosis performance test, 3 times of test liquid are continuously injected, 5.0 mL each time, with an interval of 5 minutes, 10 layers of Φ9 medium-speed filter paper are covered on the surface of the groove at the 20th second after the completion of the third absorption, a pressure of 153 Pa is applied for 1 minute, the mass of the filter paper before the first absorption is m1, the mass of the filter paper after the third absorption is m3, and △G2 = m3-m1; wherein, the △G2≤1.0 g.

[0012] A production process of period pants, comprising the following steps:

[0013] S1, preparation of nanofiber membrane: mixing polylactic acid and hemp fibers, adding imidazole ionic liquid solvent to prepare a mixed solution with a mass fraction of 8wt%-12wt%, stirring at a temperature of 100℃-120℃ and a stirring speed of 200r / min-400r / min for 2h-4h to form a uniform spinning solution, and then spinning the spinning solution after dehydration through a spinneret under a voltage of 25kV-30kV and a receiving distance of 15cm-20cm to obtain a nanofiber membrane;

[0014] S2, antibacterial strip compounding: uniformly spreading microcapsule particles on the surface of a layer of nanofiber membrane, and covering another layer of nanofiber membrane to form an antibacterial strip;

[0015] S3, preparation of double-layer absorption core: sequentially stacking wood pulp absorption layer, antibacterial strip and high molecular absorption layer to prepare a double-layer absorption core through a hot-pressing compounding process;

[0016] S4, structure forming: pressing a U-shaped groove at the crotch position of the skin-friendly layer through a hot-pressing die; rolling and pressing the flow guide layer through a rotary hot-pressing roller to form a circular groove, turning over the flow guide layer, and accurately punching the bottom of the circular groove through an ultraviolet laser puncher;

[0017] S5, overall compounding: synchronously conveying the skin-friendly layer, the flow guide layer, the double-layer absorption core and the water barrier layer to a compounding station through independent unwinding devices, and continuously spot welding through a rotary ultrasonic welding wheel;

[0018] S6, three-dimensional forming: cutting the compounded material into an O shape, pressing and combining the slow-rebound arc-shaped containment of the leg through a hot-pressing die to obtain the period pants.

[0019] Further, the imidazole ionic liquid solvent is preferably 1-allyl-3-methylimidazole chloride.

[0020] Further, the particle size of the microcapsule particles is 100μm-300μm, and the content of the microcapsule particles spread on the surface of the nanofiber membrane is 20g / m 2 -30g / m 2 .

[0021] Further: when ultrasonic spot welding, a grid-shaped fusion spot is formed in the spot welding area, the fusion area accounts for less than or equal to 8%, and the opening position of the flow guide layer is avoided.

[0022] Further: the mass ratio of the beta cyclodextrin to the matrine is 1:3-5.

[0023] Further: the mass ratio of the polylactic acid to the hemp fiber is 7:3-5.

[0024] By adopting the foregoing technical solutions, the present application has the following beneficial effects:

[0025] 1. The groove (with a larger width) serves as a primary flow guide structure, quickly collects and converges liquid to the circular groove (with a smaller width) below, forms a 'wide-narrow' funnel effect, and accelerates the downward speed of the liquid. The opening at the bottom of the circular groove serves as a secondary flow guide outlet, ensures that the liquid uniformly penetrates into the lower layer of the absorbent core, and avoids the risk of side leakage caused by local saturation.

[0026] 2. The microcapsule particles are uniformly distributed in the gap of the nanofiber membrane, and after contacting with the body fluid, the beta-cyclodextrin inclusion gradually dissociates, and the matrine is released slowly. Compared with the traditional silver ion antibacterial layer, the risk of heavy metal residue is avoided, and the safety is improved. The hemp fiber in the nanofiber membrane contains natural antibacterial ingredients, and forms a double antibacterial barrier with the matrine.

[0027] 3. The skin-friendly layer is made of at least one of cotton fiber, modal fiber, lyocell fiber, and soybean protein fiber, which not only retains the softness and comfort of cotton, but also realizes smooth and non-sticky surface, realizes 'fast flow guide' and 'low reverse osmosis' effect, and maintains dryness effect.

[0028] 4. The wood pulp absorption layer of the double-layer absorbent core can quickly absorb a large amount of liquid, and the high molecular absorption layer has strong water locking capacity, which can prevent the back seepage of the absorbed liquid. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a plane schematic view of the period pants in the embodiment of the present application;

[0030] Figure 2 It is a structure schematic view of the period pants in the embodiment of the present application;

[0031] Figure 3 It is a structure schematic view of the groove and the circular groove in the embodiment of the present application;

[0032] Figure 4 It is a structure schematic view of the antibacterial strip in the embodiment of the present application;

[0033] Explanation of figure labels: main absorption area 1, connecting area 2, skin-friendly layer 11, flow guide layer 12, double-layer absorption core 13, water barrier layer 14, groove 111, circular groove 121, opening 122, wood pulp absorption layer 131, high polymer absorption layer 132, antibacterial strip 133, nanofiber membrane 133a, antibacterial microcapsule particles 133b. DETAILED DESCRIPTION

[0034] Example 1

[0035] Reference Figures 1 to 4 A menstrual pant, comprising a main absorption area (1) and a connecting area (2), the connecting area (2) being arranged at both ends of the main absorption area (1) to form a ring-shaped waist, the main absorption area (1) comprising, from top to bottom, a skin-friendly layer (11), a flow guide layer (12), a double-layer absorption core (13), and a water barrier layer (14); the crotch position of the skin-friendly layer (11) is provided with a groove (111), and the flow guide layer (12) is provided with a circular groove (121) corresponding to the bottom of the groove (111); the flow guide layer (12) is also provided with an opening (122) corresponding to the position of the circular groove; the double-layer absorption core (13) comprises an upper wood pulp absorption layer (131) and a lower high polymer absorption layer (132), and a plurality of equally spaced antibacterial strips (133) are arranged between the wood pulp absorption layer (131) and the high polymer absorption layer (132), the gap between the antibacterial strips (133) being 3 mm; the antibacterial strip (133) is formed by two layers of nanofiber membranes (133a) containing antibacterial microcapsule particles (133b).

[0036] The circular groove (121) has a groove depth of 1 / 3 of the thickness of the flow guide layer (12), and the groove width of the circular groove (121) is 1:1.2 of the width of the groove (111).

[0037] The skin-friendly layer is made of cotton fiber and modal fiber blended in a mass ratio of 4:1.

[0038] The production process of the above-mentioned menstrual pant comprises the following steps:

[0039] S1, preparation of antibacterial microcapsule particles: β-cyclodextrin is dissolved in water, matrine powder is added, and the mixture is stirred uniformly at 55°C, and then spray dried to obtain microcapsule particles; the mass ratio of β-cyclodextrin to matrine is 1:3;

[0040] S2, preparation of nanofiber membrane: polylactic acid and hemp fibers are mixed, 1-allyl-3-methylimidazolium chloride is added to form a mixed solution with a mass fraction of 8wt%, under the conditions of a temperature of 100 DEG C and a stirring speed of 200 r / min, the mixed solution is stirred for 2h to form a uniform spinning solution, after dehydration, the spinning solution is extruded through a spinneret, under the conditions of a voltage of 25kV and a receiving distance of 15cm, the nanofiber membrane is obtained; the mass ratio of the polylactic acid and the hemp fibers is 7:3;

[0041] S3, antibacterial strip compounding: the microcapsule particles are uniformly scattered on the surface of a layer of nanofiber membrane, and another layer of nanofiber membrane is covered to form an antibacterial strip; the particle size of the microcapsule particles is 100μm, and the content of the microcapsule particles scattered on the surface of the nanofiber membrane is 20g / m 2 ;

[0042] S4, preparation of double-layer absorbent core: wood pulp absorbent layer, antibacterial strip and high molecular absorbent layer are stacked in sequence to form a double-layer absorbent core through hot pressing compounding process;

[0043] S5, structure forming: the skin-friendly layer is pressed into a U-shaped groove at the crotch position by a hot pressing die; the flow guide layer is rolled to form a circular groove by a rotating hot pressing roller, and the flow guide layer is turned over and accurately punched at the bottom of the circular groove by a ultraviolet laser punching machine;

[0044] S6, overall compounding: the skin-friendly layer, the flow guide layer, the double-layer absorbent core and the water barrier layer are synchronously conveyed to a compounding station by independent unwinding devices, and are continuously spot-welded by a rotating ultrasonic welding wheel;

[0045] S7, three-dimensional forming: the compounded material is cut into O-shaped, and the leg leakage prevention barrier is pressed into a slow-rebound arc-shaped barrier by a hot pressing die, to obtain the period pants;

[0046] During ultrasonic spot welding, grid-shaped fusion points are formed in the spot-welding area, and the fusion area accounts for 8%, and avoids the opening position of the flow guide layer.

[0047] The period pants prepared above are subjected to reverse osmosis performance test, the test liquid is a standard synthetic test solution containing 0.1% E. coli ATCC25922 suspension, the viscosity is 1.1mPa·s, and the temperature is 24 DEG C:

[0048] I, the initial reverse osmosis performance of the period pants is △G1, when testing the reverse osmosis performance, the main absorption area of the period pants is flattened and fixed, the skin-friendly layer groove center point is aligned with the funnel lower opening center, the funnel lower opening is 5mm-10mm away from the groove surface, 5.0mL of test liquid is injected at a flow rate of 2.0mL / s, and the complete absorption time T is recorded as 0.7s; 20 seconds after absorption is completed, 10 layers of Ф9 medium-speed filter paper are covered on the groove surface, a pressure of 153Pa is applied for 1 minute, the mass of the filter paper before absorption is m1, the mass of the filter paper after absorption is m2, and △G1=m2-m1, wherein the △G1 is 0.15g;

[0049] II, then take out the bacteriostatic strip, shake it with sterile normal saline for 10 minutes, culture the extraction liquid for 24 hours, and calculate the colony reduction rate as 99.2%;

[0050] III, the saturated reverse osmosis performance of the period pants is △G2, when testing the reverse osmosis performance, 3 times of test liquid are continuously injected, each time 5.0mL, with an interval of 5 minutes, 20 seconds after the third absorption is completed, 10 layers of Ф9 medium-speed filter paper are covered on the groove surface, a pressure of 153Pa is applied for 1 minute, the mass of the filter paper before the first absorption is m1, the mass of the filter paper after the third absorption is m3, and △G2=m3-m1, wherein the △G2 is 0.75g.

[0051] Example 2

[0052] A period pants, comprising a main absorption area and a connecting area, the connecting area is arranged at both ends of the main absorption area to form a ring-shaped waist, the main absorption area comprises a skin-friendly layer, a flow guide layer, a double-layer absorption core, and a water barrier layer arranged in sequence from top to bottom; the crotch position of the skin-friendly layer is provided with a groove, the flow guide layer is provided with a circular groove corresponding to the bottom of the groove; the flow guide layer is also provided with an opening corresponding to the position of the circular groove; the double-layer absorption core comprises a wood pulp absorption layer as an upper layer and a high polymer absorption layer as a lower layer, a plurality of equally distributed bacteriostatic strips are arranged between the wood pulp absorption layer and the high polymer absorption layer, and the gap between the bacteriostatic strips is 5mm; the bacteriostatic strip is formed by two layers of nanofiber membranes sandwiching bacteriostatic microcapsule particles.

[0053] The circular groove has a groove depth of 1 / 3 of the thickness of the flow guide layer, and the groove width of the circular groove is 1:1.8 of the groove width.

[0054] The skin-friendly layer is made of cotton fiber and lyocell fiber blended, and the mass ratio of cotton fiber to lyocell fiber is 3.5:1.

[0055] The production process of the period pants described above comprises the following steps:

[0056] S1, preparation of bacteriostatic microcapsule particles: dissolve β-cyclodextrin in water, add matrine powder, stir uniformly at 60°C, and then spray dry to obtain microcapsule particles; the mass ratio of β-cyclodextrin to matrine is 1:4;

[0057] S2, preparation of nanofiber membrane: mix polylactic acid and hemp fibers, add 1-allyl-3-methylimidazole chloride to form a mixed solution with a mass fraction of 10wt%, stir for 2h at a temperature of 110°C and a stirring speed of 300r / min to form a uniform spinning solution, then spin the spinning solution after dehydration through a spinneret under the conditions of a voltage of 25kV and a receiving distance of 15cm to obtain a nanofiber membrane; the mass ratio of polylactic acid to hemp fiber is 7:4;

[0058] S3, bacteriostatic strip compounding: uniformly spread the microcapsule particles on the surface of a layer of nanofiber membrane, cover another layer of nanofiber membrane to form a bacteriostatic strip; the particle size of the microcapsule particles is 200μm, and the content of the microcapsule particles spread on the surface of the nanofiber membrane is 25g / m 2 ;

[0059] S4, preparation of double-layer absorbent core: stack wood pulp absorbent layer, bacteriostatic strip and high molecular absorbent layer in sequence to prepare a double-layer absorbent core by hot pressing compounding process;

[0060] S5, structure forming: press a U-shaped groove in the crotch position of the skin-friendly layer by a hot pressing die; roll the flow guide layer to form a circular groove by a rotating hot pressing roller, turn over the flow guide layer, and accurately punch holes at the bottom of the circular groove by a ultraviolet laser puncher;

[0061] S6, overall compounding: synchronously convey the skin-friendly layer, the flow guide layer, the double-layer absorbent core and the water barrier layer to a compounding station by independent unwinding devices, and continuously spot weld by a rotating ultrasonic welding wheel;

[0062] S7, three-dimensional forming: cut the compounded material into O-shape, press and combine the slow-rebound arc-shaped containment barrier of the leg leakage prevention by a hot pressing die to obtain the period pants.

[0063] During ultrasonic spot welding, grid-shaped fusion points are formed in the spot welding area, and the fusion area accounts for 8%, and avoids the opening position of the flow guide layer.

[0064] The period pants prepared above are subjected to reverse osmosis performance test, the test liquid is a standard synthetic test solution containing 0.1% E. coli ATCC25922 suspension, the viscosity is 1.1mPa·s, and the temperature is 24°C.

[0065] I, the initial reverse osmosis performance of the period pants is △G1, when testing the reverse osmosis performance, the main absorption area of the period pants is flattened and fixed, the skin-friendly layer groove center point is aligned with the funnel lower opening center, the funnel lower opening is 5mm-10mm away from the groove surface, 5.0mL of test liquid is injected at a flow rate of 2.0mL / s, and the complete absorption time T is recorded as 0.6s; 20 seconds after the absorption is completed, 10 layers of Ф9 medium-speed filter paper are covered on the groove surface, a pressure of 153Pa is applied for 1 minute, the mass of the filter paper before absorption is m1, the mass of the filter paper after absorption is m2, and △G1=m2-m1, wherein the △G1 is 0.15g;

[0066] II, then take out the bacteriostatic strip, shake it with sterile normal saline for 10 minutes, culture the extraction liquid for 24 hours, and calculate the colony reduction rate as 99.0%;

[0067] III, the saturated reverse osmosis performance of the period pants is △G2, when testing the reverse osmosis performance, 3 times of test liquid are continuously injected, each time 5.0mL, with an interval of 5 minutes, 20 seconds after the third absorption is completed, 10 layers of Ф9 medium-speed filter paper are covered on the groove surface, a pressure of 153Pa is applied for 1 minute, the mass of the filter paper before the first absorption is m1, the mass of the filter paper after the third absorption is m3, and △G2=m3-m1, wherein the △G2 is 0.85g.

[0068] Example 3

[0069] A period pants, comprising a main absorption area and a connecting area, the connecting area is arranged at both ends of the main absorption area to form a ring-shaped waist, the main absorption area comprises a skin-friendly layer, a flow guide layer, a double-layer absorption core, and a water barrier layer arranged in sequence from top to bottom; the crotch position of the skin-friendly layer is provided with a groove, the flow guide layer is provided with a circular groove corresponding to the bottom of the groove; the flow guide layer is also provided with an opening corresponding to the position of the circular groove; the double-layer absorption core comprises a wood pulp absorption layer as an upper layer and a high polymer absorption layer as a lower layer, a plurality of equally distributed bacteriostatic strips are arranged between the wood pulp absorption layer and the high polymer absorption layer, and the gap between the bacteriostatic strips is 8mm; the bacteriostatic strip is formed by two layers of nanofiber membranes sandwiching bacteriostatic microcapsule particles.

[0070] Among them, the groove depth of the circular groove is 1 / 2 of the thickness of the flow guide layer, and the groove width of the circular groove is 1:3 of the groove width.

[0071] The skin-friendly layer is made of cotton fiber and soybean protein fiber blended, and the mass ratio of cotton fiber to soybean protein fiber is 3:1.

[0072] The production process of the period pants described above comprises the following steps:

[0073] S1, preparation of bacteriostatic microcapsule particles: dissolve beta cyclodextrin in water, add matrine powder, stir uniformly at 60 DEG C, and then spray dry to obtain microcapsule particles; the mass ratio of beta cyclodextrin to matrine is 1:5;

[0074] S2, preparation of nanofiber membrane: mix polylactic acid and hemp fibers, add 1-allyl-3-methylimidazole chloride to form a mixed solution with a mass fraction of 12wt%, stir for 4h under the conditions of a temperature of 120 DEG C and a stirring speed of 400r / min, form a uniform spinning solution, and then extrude the spinning solution through a spinneret after dehydration, spin under the conditions of a voltage of 30kV and a receiving distance of 20cm, and obtain a nanofiber membrane; the mass ratio of polylactic acid to hemp fiber is 7:5;

[0075] S3, bacteriostatic strip compounding: uniformly spread the microcapsule particles on the surface of a layer of nanofiber membrane, cover another layer of nanofiber membrane, and form a bacteriostatic strip; the particle size of the microcapsule particles is 300μm, and the content of the microcapsule particles spread on the surface of the nanofiber membrane is 30g / m 2 ;

[0076] S4, preparation of double-layer absorbent core: sequentially stack wood pulp absorbent layer, bacteriostatic strip and high molecular absorbent layer, and prepare a double-layer absorbent core through a hot-pressing compounding process;

[0077] S5, structure forming: press a U-shaped groove in the crotch position of the skin-friendly layer through a hot-pressing die; roll and press the flow guide layer through a rotating hot-pressing roller to form a circular groove, turn over the flow guide layer, and accurately punch holes in the bottom of the circular groove through a ultraviolet laser punching machine;

[0078] S6, overall compounding: synchronously convey the skin-friendly layer, the flow guide layer, the double-layer absorbent core and the water barrier layer to a compounding station through independent unwinding devices, and continuously spot weld through a rotating ultrasonic welding wheel;

[0079] S7, three-dimensional forming: cut the compounded material into an O-shaped, press a slow-rebound arc-shaped containment barrier in the leg portion of the material through a hot-pressing die, and obtain the period pants.

[0080] During ultrasonic spot welding, grid-shaped fusion points are formed in the spot welding area, and the fusion area accounts for 8%, and avoids the opening position of the flow guide layer.

[0081] Test the anti-permeability of the period pants prepared above, the test liquid is a standard synthetic test solution containing 0.1% E. coli ATCC25922 suspension, the viscosity is 1.1mPa·s, and the temperature is 24 DEG C.

[0082] I, the initial reverse osmosis performance of the period pants is AG1, when testing the reverse osmosis performance, the main absorption area of the period pants is flattened and fixed, the center point of the skin-friendly layer groove is aligned with the lower center of the permeation tester funnel, the lower center of the funnel is 5-10 mm away from the surface of the groove, 5.0 mL of test liquid is injected at a flow rate of 2.0 mL / s to the center point of the groove, and the complete absorption time T is recorded as 0.6 s; 20 seconds after the absorption is completed, 10 layers of Ф9 medium-speed filter paper are covered on the surface of the groove, a pressure of 153 Pa is applied for 1 minute, the mass of the filter paper before absorption is m1, the mass of the filter paper after absorption is m2, AG1=m2-m1, and the AG1 is 0.30 g;

[0083] II, then the antibacterial strip is taken out, shaken with sterile normal saline for 10 minutes, and the extraction liquid is cultured for 24 hours, and the colony reduction rate is calculated to be 99.1%;

[0084] III, the saturated reverse osmosis performance of the period pants is AG2, when testing the reverse osmosis performance, 3 times of test liquid are continuously injected, each time 5.0 mL, with an interval of 5 minutes, 20 seconds after the third absorption is completed, 10 layers of Ф9 medium-speed filter paper are covered on the surface of the groove, a pressure of 153 Pa is applied for 1 minute, the mass of the filter paper before the first absorption is m1, the mass of the filter paper after the third absorption is m3, AG2=m3-m1, and the AG2 is 0.95 g.

[0085] Comparative Example 1

[0086] The difference from Example 1 is that the skin-friendly layer is pure cotton material, the flow guide layer is not provided with a circular groove, there is no antibacterial strip, and the absorption core is a single high polymer layer. Other technical solutions are the same as those of Example 1.

[0087] Table 1

[0088] Item Complete absorption time T (s) Initial osmosis performance ΔG1 (g) Saturation reverse osmosis performance is AG2(g) Colony reduction rate of E. coli (%) Example 1 0.7 0.15, no liquid residue on the grooved surface 0.75 g, no break in the core 99.2 Example 2 0.6 0.22, no liquid residue on the grooved surface 0.85, no break in the core 99.0 Example 3 0.6 0.30, no liquid residue on the grooved surface 0.95, no break in the core 99.1 Comparative Example 1 3.0 1.20, significant liquid residue on the surface Side leakage at the second injection, test not completed 70.0

[0089] As can be seen from the test results in Table 1, the period pants prepared by the technical scheme have good reverse osmosis prevention performance, fast absorption speed, dry surface, and good antibacterial effect.

[0090] Although the present application is specifically shown and introduced in combination with preferred embodiments, it should be understood by those skilled in the art that various changes can be made to the present application in form and detail without departing from the spirit and scope of the present application defined in the appended claims, and all such changes are within the protection scope of the present application.

Claims

1. A menstrual panty, characterized in that: It includes a main absorption area and a connecting area. The connecting area is located at both ends of the main absorption area, forming an annular waist. The main absorption area includes a skin-friendly layer, a flow-guiding layer, a double-layer absorbent core, and a water-resistant layer, stacked sequentially from top to bottom. The skin-friendly layer has a groove at the crotch position, and the flow-guiding layer has a circular groove at the bottom of the groove. The flow-guiding layer also has an opening at the position corresponding to the circular groove. The double-layer absorbent core includes an upper wood pulp absorbent layer and a lower polymer absorbent layer. Several equidistantly distributed antibacterial strips are sandwiched between the wood pulp absorbent layer and the polymer absorbent layer. The gap between the antibacterial strips is 3mm-10mm. The antibacterial strips are upper and lower. The nanofiber membrane is formed by encapsulating antibacterial microcapsule particles; wherein, the preparation process of the antibacterial microcapsule particles is as follows: β-cyclodextrin is dissolved in water, matrine powder is added, and the mixture is stirred evenly at 55℃-60℃, followed by spray drying to obtain microcapsule particles; the depth of the circular groove is 1 / 3-1 / 2 of the thickness of the guide layer, and the ratio of the width of the circular groove to the width of the groove is 1:1.5-3; the skin-friendly layer is composed of a blend of a first fiber and a second fiber, wherein the first fiber is cotton fiber, and the second fiber is any one of modal fiber, lyocell fiber, or soybean protein fiber, and the mass ratio of the first fiber to the second fiber is 3-5:

1.

2. The menstrual pants according to claim 1, characterized in that: The initial reverse osmosis performance of the menstrual panties is ΔG1. During the reverse osmosis performance test, the main absorbent area of ​​the menstrual panties is flattened and fixed, with the center point of the skin-friendly layer groove aligned with the center of the lower opening of the permeability tester funnel. The lower opening of the funnel is 5mm-10mm away from the surface of the groove. 5.0mL of test solution at a flow rate of 2.0mL / s is injected into the center point of the groove, and the complete absorption time T is recorded. 20 seconds after absorption, 10 layers of Ф9 medium-speed filter paper are covered on the surface of the groove, and a pressure of 153Pa is applied for 1 minute. The mass of the filter paper before absorption is m1, and the mass of the filter paper after absorption is m2. ΔG1 = m2 - m1; wherein, ΔG1 ≤ 0.5g.

3. A menstrual panty according to claim 1, characterized in that: The saturated reverse osmosis performance of the menstrual pants is ΔG2. During the reverse osmosis performance test, the test solution is injected three times consecutively, 5.0 mL each time, with an interval of 5 minutes. Twenty seconds after the third absorption is completed, 10 layers of Ф9 medium-speed filter paper are covered on the groove surface, and a pressure of 153 Pa is applied for 1 minute. The mass of the filter paper before the first absorption is m1, and the mass of the filter paper after the third absorption is m3. ΔG2 = m3 - m1; wherein, ΔG2 ≤ 1.0 g.

4. The manufacturing process of menstrual pants according to claim 1, characterized in that, Includes the following steps: S1. Preparation of nanofiber membrane: Polylactic acid and hemp fiber are mixed and mixed with imidazole ionic liquid solvent to prepare a mixed solution with a mass fraction of 8wt%-12wt%. The solution is stirred for 2h-4h at a temperature of 100℃-120℃ and a stirring speed of 200r / min-400r / min to form a uniform spinning solution. After dehydration, the spinning solution is extruded through a spinneret and spun at a voltage of 25kV-30kV and a receiving distance of 15cm-20cm to obtain a nanofiber membrane. S2, Antibacterial Strip Composite: Microcapsule particles are evenly distributed on the surface of a layer of nanofiber membrane, and then covered with another layer of nanofiber membrane to form an antibacterial strip; S3. Preparation of double-layer absorbent core: The wood pulp absorbent layer, antibacterial strip and polymer absorbent layer are stacked in sequence and the double-layer absorbent core is made by hot pressing composite process. S4. Structural Forming: The skin-friendly layer is pressed into a U-shaped groove at the crotch position by a hot press mold; the guide layer is rolled into a circular groove by rotating hot press rollers, the guide layer is flipped over, and a UV laser drilling machine is used to precisely drill holes at the bottom of the circular groove. S5. Overall Composite: The skin-friendly layer, the flow-guiding layer, the double-layer absorbent core and the waterproof layer are simultaneously conveyed to the composite station through an independent unwinding device, and continuous spot welding is performed using a rotary ultrasonic welding wheel. S6. Three-dimensional molding: After the composite material is cut into O-shapes, the leg anti-leakage partition is pressed into a slow rebound arc-shaped protective wall by a hot press mold to obtain the menstrual pants.

5. The manufacturing process of menstrual pants according to claim 4, characterized in that: The microcapsule particles have a particle size of 100μm-300μm, and the content of microcapsule particles sprinkled on the surface of the nanofiber membrane is 20g / m². 2 -30g / m 2 .

6. The manufacturing process of menstrual pants according to claim 4, characterized in that: During ultrasonic spot welding, a grid-like fusion point is formed in the spot welding area, with the fusion area accounting for ≤8%, and the opening position of the guide layer is avoided.

7. The manufacturing process of menstrual pants according to claim 4, characterized in that: The mass ratio of β-cyclodextrin to matrine is 1:3-5.

8. The manufacturing process of menstrual pants according to claim 4, characterized in that: The mass ratio of polylactic acid to hemp fiber is 7:3-5.

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