Natural latex mixed core body, manufacturing method, and sanitary pant

Abstract

The present application relates to the technical field of sanitary products, and relates to a natural latex mixed core body, a manufacturing method, and a sanitary pant. The natural latex mixed core body comprises a large-particle polymer layer and a small-particle polymer layer, wherein the large-particle polymer layer is connected to the small-particle polymer layer by means of a natural latex layer. The present application has the effects of reducing unpleasant odor after the core body absorbs a liquid, improving the water absorption capacity of the core body, effectively preventing the core body from hardening and clumping, and improving the comfort of the touch feeling of the core body.

Description

Natural latex mixed core, manufacturing method and sanitary pants Technical Field

[0001] The present application relates to the technical field of sanitary products, and in particular to a natural latex mixed core, a manufacturing method and sanitary pants. Background Art

[0002] The absorbent core is the core part that ensures the water absorption and water locking function. It is often used as a component of sanitary pants such as diapers, menstrual pants, urine pads, disposable underwear, etc. When in use, the absorbent core is placed in the sanitary pants to absorb urine, sweat, menstrual blood, etc., thereby improving the absorption effect of the sanitary pants.

[0003] Traditional absorbent cores are made of SAP (super absorbent polymer) material, and hot melt adhesive is required to fix the SAP between each layer of material. The more SAP, the more hot melt adhesive is needed, which makes the core feel harder and less breathable, affecting the liquid absorption speed. Moreover, after absorbing the liquid, the odor is relatively strong.

[0004] Summary of the Invention

[0005] In order to improve the problem that sanitary pants have a strong odor after absorbing liquid, the present application provides a natural latex mixed core, a manufacturing method and sanitary pants.

[0006] On the one hand, the present application provides a natural latex mixed core adopting the following technical solution:

[0007] A natural latex mixed core comprises a large-particle polymer layer and a small-particle polymer layer, wherein the large-particle polymer layer and the small-particle polymer layer are connected via a natural latex layer.

[0008] By adopting the above technical solution, when the natural latex mixed core is in use, the large-particle polymer layer can allow liquid to penetrate faster and keep it dry, and the small-particle polymer layer can absorb water quickly and be highly saturated with water to prevent liquid overflow. At the same time, the layers are adhered to each other through the natural latex layer. Compared with the hot melt adhesive connection method, this solution can reduce the odor after the core absorbs liquid.

[0009] In a specific embodiment, the particle size of the large-particle polymer layer is 100 μm-1500 μm, and the particle size of the small-particle polymer layer is 20 μm-850 μm.

[0010] In a specific embodiment, a fluffy non-woven fabric layer is provided between the large-particle polymer layer and the small-particle polymer layer, and the natural latex layer can wrap the fluffy non-woven fabric layer.

[0011] By adopting the above technical solution and adding a fluffy non-woven fabric layer, the water absorption effect of the core is improved.

[0012] In a specific embodiment, there are gaps between the large particle polymer layer and the fluffy non-woven fabric, and between the small particle polymer layer and the fluffy non-woven fabric.

[0013] By adopting the above technical solution and providing gaps, the water absorption capacity of the core can be improved, and at the same time, the core can be effectively prevented from becoming hardened or clumped, thereby improving the comfort of the core's touch.

[0014] In a specific embodiment, a non-woven fabric layer is provided on the large particle polymer layer or the small particle polymer layer.

[0015] By adopting the above technical solution and providing the non-woven fabric layer, the natural latex layer can be effectively prevented from breaking during processing.

[0016] On the other hand, the sanitary pants provided by this application adopt the following technical solution:

[0017] A pair of sanitary pants comprises the natural latex mixed core and the sanitary pants.

[0018] In a specific embodiment, it also includes a surface layer, a covering layer, a covering cloth, and a breathable base film. The surface layer is used to fit the skin, and the breathable base film is located at the outermost layer of the sanitary pants. The covering layer, the natural latex mixed core, and the covering cloth are located between the surface layer and the breathable base film.

[0019] By adopting the above technical solution, the surface layer and the covering layer can promote rapid liquid penetration and effectively prevent back seepage, so the surface of the diaper remains dry. The covering cloth and the breathable bottom film can improve the breathability of the sanitary pants and prevent liquid leakage.

[0020] In a specific embodiment, it further includes an elastic waist, which is arranged at both ends of the surface layer. Each elastic waist is provided with two Velcro strips, and the Velcro strips on different elastic waists are connected to each other, so that the sanitary pants can be worn.

[0021] By adopting the above technical solution, the sanitary pants can better fit the waist of the human body through the elastic waistbands on both sides, and are connected to each other through two Velcro strips, thereby improving the convenience of wearing the sanitary pants.

[0022] On the other hand, the present application provides a method for manufacturing a natural latex mixed core using the following technical solutions:

[0023] A method for manufacturing a natural latex mixed core, comprising the natural latex mixed core, further comprising the following steps:

[0024] S10, producing a fluffy non-woven fabric from the polyester fiber using a fluffy non-woven fabric production process;

[0025] S20, spraying liquid latex onto the conveyor belt, and after the liquid latex solidifies, cutting the natural latex layer flat with a cutter;

[0026] S30, roller spreading polymer material, spraying the small-particle polymer material onto the natural latex layer through a spraying device to form a small-particle polymer layer;

[0027] S40, moving the fluffy non-woven fabric to a coating table, and laminating the fluffy non-woven fabric with the natural latex layer;

[0028] S50, spraying large-particle polymer material onto the fluffy non-woven fabric, and then spraying latex liquid onto the large-particle polymer layer. After the latex liquid solidifies, the natural latex layer is scraped flat with a scraper;

[0029] S60, then proceed with infrared shaping - vulcanization - drying - cooling and peeling - applying anti-sticking material - slitting - winding - packaging.

[0030] In a specific embodiment, the fluffy nonwoven fabric production process includes:

[0031] S11 Unpacking: Spray a small amount of water into the polyester fiber during unpacking.

[0032] S12 Cotton Blending: The unpacked polyester fibers are mixed in a cotton blending machine and then put into the cotton box;

[0033] S13 carding: using a carding machine to card the polyester fibers into a single fiber state to form a thin mesh fiber layer;

[0034] S14 Laying: Use the laying machine to lay the polyester fiber thin layer width and number evenly;

[0035] S15 Needling: Using a needle loom to pierce the polyester fiber web, the barbed hooks on the needles drive the fibers on the surface and subsurface of the web to move from the plane direction of the web to the vertical direction of the web, causing the fibers to shift up and down. The shifted fibers exert a certain pressure on the web, causing the fibers in the web to move closer together and be compressed. This process has two needling passes.

[0036] S16 Ironing: Use hot air oven at 130℃ to dry the needle punched nonwoven fabric.

[0037] In summary, this application includes at least one of the following beneficial technical effects:

[0038] 1. When the natural latex mixed core is in use, the large-particle polymer layer allows liquid to penetrate faster, keeping it dry, while the small-particle polymer layer absorbs water to prevent it from overflowing. At the same time, the natural latex layer adheres the layers together. Compared with the hot melt adhesive connection method, this solution can reduce the odor of the core after absorbing liquid;

[0039] 2. When the sanitary pants are used, the liquid penetrates into the natural latex mixed core through the surface layer and the covering layer. The natural latex mixed core absorbs the liquid, and the surface layer and the covering layer can promote the rapid penetration of the liquid and effectively prevent back seepage. The surface of the diaper remains dry. The covering cloth and the breathable bottom film can improve the breathability of the sanitary pants and prevent liquid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] FIG1 is a schematic structural diagram of a natural latex mixed core according to Example 1 of the present application.

[0041] FIG2 is a schematic diagram showing the structure of the fluffy non-woven fabric layer.

[0042] Figure 3 is a schematic structural diagram of a natural latex mixed core according to Example 2 of the present application.

[0043] FIG4 is a schematic structural diagram of a sanitary trouser according to an embodiment of the present application.

[0044] FIG5 is an expanded view of the sanitary pants in an embodiment of the present application.

[0045] FIG6 is a cross-sectional view taken along line AA in FIG5 .

[0046] FIG7 is a process flow chart for producing a natural latex mixed core.

[0047] Explanation of the accompanying symbols: 1. Natural latex mixed core; 11. Large particle polymer layer; 12. Small particle polymer layer; 13. Fluffy non-woven fabric layer; 14. Natural latex layer; 15. Gap; 16. Non-woven fabric layer; 2. Surface layer; 3. Covering layer; 4. Covering cloth; 5. Breathable bottom film; 6. Elastic waist; 7. Velcro. DETAILED DESCRIPTION

[0048] The present application is further described in detail below with reference to Figures 1-7.

[0049] On the one hand, embodiments of the present application disclose a natural latex mixed core.

[0050] Example 1

[0051] 1 and 2, a natural latex mixed core includes a large particle polymer layer 11 and a small particle polymer layer 12, the large particle polymer layer 11 is a water-absorbing resin with a particle size of 100 μm-1500 μm, the small particle polymer layer 12 is a water-absorbing resin with a particle size of 20 μm-850 μm, the large particle polymer layer 11 and the small particle polymer layer 12 are connected by a natural latex layer 14, the large particle polymer layer 11 is a layered structure formed by partially embedding a large particle polymer material between the natural latex layer 14, and the small particle polymer layer 12 is a small particle polymer layer. The sub-material is partially embedded in the layered structure formed in the natural latex layer 14. A fluffy non-woven fabric layer 13 is provided between the large-particle polymer layer 11 and the small-particle polymer layer 12. The fluffy non-woven fabric layer 13 is in the shape of a spider web. The fluffy non-woven fabric layer 13 is located in the natural latex layer 14. Both the large-particle polymer material and the small-particle polymer material can be embedded in the fluffy non-woven fabric layer 13. A gap 15 is formed between the large-particle polymer material and the fluffy non-woven fabric layer 13, and between the small-particle polymer material and the fluffy non-woven fabric layer 13. The gram weight of the fluffy non-woven fabric in this embodiment is 18 to 25 g / m 2 ;Thickness is 0.5~2.0mm.

[0052] The implementation principle of Example 1 is: when the natural latex mixed core 1 is in use, the liquid passes through the large-particle polymer layer 11 into the fluffy non-woven fabric for absorption. The large-particle polymer layer 11 can make the liquid penetrate faster and keep dry. The small-particle polymer layer 12 can absorb water quickly and be highly saturated with water to prevent liquid overflow. At the same time, the layers are adhered to each other through the natural latex layer 14. Compared with the hot melt adhesive connection method, this solution can reduce the odor of the core after absorbing liquid. At the same time, gaps 15 are formed between the large-particle polymer material and the fluffy non-woven fabric layer 13, and between the small-particle polymer material and the fluffy non-woven fabric layer 13, which can improve the liquid absorption rate and air permeability of the core, and can effectively avoid the core from becoming clumped and lumpy, thereby improving the comfort of the core touch.

[0053] Example 2

[0054] 3 , the difference between this embodiment and embodiment 1 is that a non-woven fabric layer 16 is coated on the outside of the small-particle polymer layer 12 or the large-particle polymer layer 11. In this embodiment, the non-woven fabric layer 16 is arranged on the outside of the small-particle polymer layer 12, and the non-woven fabric layer 16 is bonded to the natural latex layer 14. When the natural latex layer 14 is liquid, the non-woven fabric layer 16 is laid on the latex liquid. After drying in an oven, the non-woven fabric layer 16 is bonded to the natural latex layer 14.

[0055] The implementation principle of Example 2 is: when the natural latex mixed core 1 is applied to a sanitary napkin, by providing the non-woven fabric layer 16, it is possible to effectively prevent the natural latex layer 14 from breaking during processing.

[0056] On the other hand, an embodiment of the present application also discloses a pair of sanitary pants.

[0057] 4 , 5 and 6 , a pair of sanitary pants comprises the above-mentioned natural latex mixed core 1, further comprising a surface layer 2, a covering layer 3, a covering cloth 4 and a breathable base film 5. The side of the sanitary pants close to the human skin is the inner side, and the sanitary pants are, from the inside to the outside, the surface layer 2, the covering layer 3, the natural latex mixed core 1, the covering cloth 4 and the breathable base film 5. The surface layer 2 and the breathable base film 5 are interconnected at each end face, covering the covering layer 3, the natural latex mixed core 1 and the covering cloth 4. The surface layer 2, the covering layer 3, the natural latex mixed core 1, the covering cloth 4 and the breathable base film 5 are all connected by hot melt. The material of the surface layer 2 is a non-woven fabric layer, and the breathable base film 5 is a PE film layer, and a non-woven fabric layer can also be used. The covering layer 3 and the covering cloth 4 are both non-woven fabric layers.

[0058] Referring to Figures 4 and 5, elastic waistbands 6 are provided at both ends of the surface layer 2. Both elastic waistbands 6 are made of POE elastic composite material. The elastic waistband 6 is connected to the surface layer 2 and the breathable bottom film 5 by hot melt. Each elastic waistband 6 is provided with two Velcros 7, and the two Velcros 7 are respectively arranged on both sides of the elastic waistband 6. When the sanitary pants are worn, the Velcros 7 on two different elastic waistbands 6 on the same side can be adhered to each other.

[0059] The working principle of the sanitary pants of the embodiment of the present application is as follows: when wearing the sanitary pants, two elastic waist bands 6 are tightly attached to the waist and then bonded together by Velcro 7. The elastic waist bands 6 on both sides can make the sanitary pants fit the waist of the human body better, and the two Velcro 7 are connected to each other, improving the convenience of wearing the sanitary pants. The surface layer 2 and the covering layer 3 can promote rapid liquid penetration and effectively prevent back seepage, keeping the surface of the diaper dry. The covering fabric 4 and the breathable base film 5 can improve the breathability of the sanitary pants and prevent liquid leakage.

[0060] On the other hand, the embodiment of the present application also discloses a diaper, which is different from the above-mentioned sanitary pants in that the waist of this diaper is integrally formed and does not need to be adhered by Velcro.

[0061] On the other hand, the embodiments of the present application also disclose a method for manufacturing a natural latex mixed core.

[0062] 7 , a method for manufacturing a natural latex mixed core includes the natural latex mixed core 1 described above, and further includes the following steps:

[0063] S10, producing a fluffy non-woven fabric from the polyester fiber using a fluffy non-woven fabric production process;

[0064] The production process of fluffy non-woven fabrics includes:

[0065] S11 Unpacking: Spray a small amount of water during the unpacking process of polyester fiber. The purpose of spraying a small amount of water is to reduce the dust generated during the unpacking process.

[0066] S12 Cotton Blending: The unpacked polyester fibers are mixed in a cotton blending machine and then put into the cotton box;

[0067] S13 carding: using a carding machine to card the polyester fibers into a single fiber state to form a thin mesh fiber layer;

[0068] S14 Laying: Use the laying machine to lay the polyester fiber thin layer width and number evenly;

[0069] S15 Needling: Using a needle loom to pierce the polyester fiber web, the barbed hooks on the needles drive the fibers on the surface and subsurface of the web to move from the plane direction of the web to the vertical direction of the web, causing the fibers to shift up and down. The shifted fibers exert a certain pressure on the web, causing the fibers in the web to move closer together and be compressed. This process has two needling passes.

[0070] S16 Ironing: Dry the needle-punched nonwoven fabric in a hot air oven at 130°C. The purpose of ironing is to liquefy the surface of the fluffy nonwoven fabric so that it can adhere to the natural latex on the upper and lower surfaces.

[0071] S20, first clean the conveyor belt, then pour the special silicone onto the conveyor belt, scrape the silicone evenly onto the conveyor belt with a scraper to a thickness of less than 0.1mm, then dry and demould, the drying temperature is 140°C, and the conveyor belt operation time is 20 minutes, then spray liquid latex onto the conveyor belt, wait until the liquid latex solidifies, and use a cutter to cut the natural latex layer 14 flat;

[0072] The latex liquid and compressed air are introduced into the high-position tank, and then the compressed air is used to squeeze the latex liquid into the mold with an adjustable discharge port for uniform discharge. The latex liquid is scraped flat by a scraper, and the position of the scraper can be adjusted in height by a hydraulic cylinder.

[0073] S30, rolling the polymer material, spraying the small-particle polymer material onto the natural latex layer 14 through a spraying device to form a small-particle polymer layer 12.

[0074] S40, moving the fluffy non-woven fabric to the coating table, and compounding the fluffy non-woven fabric with the natural latex layer 14; at this time, the fluffy non-woven fabric is located above the small particle polymer layer 12.

[0075] S50. Spray the large-particle polymer material onto the top of the fluffy non-woven fabric through the powder tearing device, then introduce latex liquid and compressed air through the high-position tank, and then use the compressed air to squeeze the latex liquid into the mold with an adjustable discharge port size for uniform discharge, spray the latex liquid onto the large-particle polymer layer 11, and after the latex liquid solidifies, use a scraper to flatten the natural latex layer 14.

[0076] S60, then proceed with infrared shaping - vulcanization - drying - cooling and peeling - applying anti-sticking material - slitting - winding - packaging.

[0077] During the vulcanization process, hot vulcanization is adopted, first using air vulcanization and then switching to direct steam vulcanization. The vulcanization temperature is 130°C. The natural rubber is vulcanized through the vulcanization process to improve the elasticity and heat resistance of the natural rubber.

[0078] During the cooling and peeling process, a wind knife machine is used to generate wind to separate the natural latex mixed core 1 from the conveyor belt connection surface. During the separation process, the wind knife can simultaneously cool the natural latex mixed core 1. After peeling, the conveyor belt is cleaned again and enters a new production process.

[0079] By applying anti-sticking material on the natural latex mixed core 1, it is possible to effectively prevent the natural latex mixed cores from sticking to each other.

[0080] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A natural latex hybrid core, characterized in that: It includes a large-particle polymer layer (11) and a small-particle polymer layer (12), and the large-particle polymer layer (11) is connected to the small-particle polymer layer (12) through a natural latex layer (14).

2. The natural latex hybrid core according to claim 1, characterized in that: The particle size of the large-particle polymer layer (11) is 100μm - 1500μm, and the particle size of the small-particle polymer layer (12) is 20μm - 850μm.

3. The natural latex hybrid core according to claim 1, characterized in that: A fluffy non-woven fabric layer (13) is provided between the large-particle polymer layer (11) and the small-particle polymer layer (12), and the natural latex layer (14) can wrap the fluffy non-woven fabric layer (13).

4. The natural latex hybrid core according to claim 3, characterized in that: Gaps (15) are formed between the large-particle polymer layer (11) and the fluffy non-woven fabric layer (13), and between the small-particle polymer layer (12) and the fluffy non-woven fabric layer (13).

5. The natural latex hybrid core according to claim 1, characterized in that: A non-woven fabric layer (16) is provided on the large-particle polymer layer (11) or the small-particle polymer layer (12).

6. A sanitary pants, characterized in that: It includes the natural latex composite core (1) described in claim 4.

7. The sanitary pants according to claim 6, characterized in that: It further includes a surface layer (2), a coating layer (3), a coating cloth (4), and a breathable bottom film (5). The surface layer (2) is used to fit the skin, the breathable bottom film (5) is located on the outermost layer of the sanitary pants, and between the surface layer (2) and the breathable bottom film (5) are, in sequence, the coating layer (3), the natural latex composite core (1), and the coating cloth (4).

8. The sanitary pants according to claim 7, characterized in that: It further includes an elastic waistband (6). The elastic waistband (6) is provided at both ends of the surface layer (2), and two magic tapes (7) are provided on each elastic waistband (6). The magic tapes (7) on different elastic waistbands (6) are connected to each other so that the sanitary pants can be worn.

9. A manufacturing method of a natural latex hybrid core, characterized in that: It includes the natural latex composite core (1) described in any one of claim 4, and further includes the following steps: S10: Produce polyester fiber into fluffy non-woven fabric by using the fluffy non-woven fabric production process. S20: Spray liquid latex onto the conveyor belt. After the liquid latex is cured, use a cutter to cut the natural latex layer (14) flat. S30: Roll and sprinkle polymer materials, and spray small-particle polymer materials onto the natural latex layer (14) through a spraying device to form a small-particle polymer layer (12). S40: Move the fluffy non-woven fabric to the coating table and laminate the fluffy non-woven fabric with the natural latex layer (14). S50: Spray large-particle polymer materials above the fluffy non-woven fabric, then spray latex liquid onto the large-particle polymer layer (11). After the latex liquid is cured, scrape the natural latex layer (14) flat with a scraper. S60: Then perform infrared shaping - vulcanization - drying - cooling and peeling - applying anti-sticking material - slitting - winding - packaging.

10. The manufacturing method of a natural latex hybrid core according to claim 9, characterized in that: The fluffy non-woven fabric production process includes: S11 Unpacking: Spray a small amount of water during the unpacking process of polyester fiber. S12 Cotton mixing: After the unpacked polyester fiber is mixed by a cotton mixer, it enters the cotton box. S13 Carding: Use a carding machine to card the polyester fiber into a single-fiber state to form a net-like fiber thin layer. S14 Web laying: Use a web laying machine to evenly lay the width and number of layers of the polyester fiber thin layer. S15 Needling: Using a needling machine, needles are inserted into the polyester fiber web. The barbs on the needles drive the fibers on the surface and subsurface of the web to move from the planar direction of the web to the vertical direction of the web, causing the fibers to shift up and down. The fibers that have shifted up and down exert a certain pressure on the web, causing the fibers in the web to come closer and be compressed. Two needling operations are set in this process; S16 Calendering: The needled non-woven fabric is dried using a hot air oven at 130 °C.

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