Adult paper diaper capable of preventing side leakage

Abstract

The invention discloses an adult paper diaper capable of preventing side leakage, and belongs to the field of nursing materials. The adult paper diaper capable of preventing side leakage comprises a surface layer, an absorption layer and a bottom layer which are sequentially arranged, double-layer three-dimensional guards are arranged on the two sides of the surface layer and comprise the first guard and the second guard, the second guard is arranged on the outer side of the first guard, the first guard is formed by hot bonding of tencel fibers and two-component fibers according to the mass ratio of (0.9-1): (0.1-0.15), and the bottom layer is formed by hot bonding of the second guard and the tencel fibers. And the second protective enclosure is formed by thermally bonding tencel fibers and two-component fibers according to the mass ratio of (0.9-1): (0.4-0.6). The side leakage prevention structure has the advantages that the side leakage prevention effect is guaranteed, and meanwhile comfort is improved.

Description

Technical Field

[0001] The present application relates to the field of nursing products, and in particular to an adult diaper that prevents side leakage. Background Art

[0002] The basic function of adult diapers is protection, among which preventing side leakage is an important part of protection.

[0003] To address the side leakage issue, the industry generally adopts a method of installing a guard structure on both sides of the diaper to contain urine and other excreta in the middle of the diaper. To further prevent side leakage, the guard structure is generally strengthened to prevent excreta from penetrating the guard structure.

[0004] However, increasing the sealing of the enclosure structure often requires denser filling materials, which is accompanied by reduced softness and breathability, leading to reduced comfort. Summary of the Invention

[0005] In order to ensure the side leakage prevention effect while improving comfort, the present application provides an adult diaper that prevents side leakage.

[0006] The present application provides an adult diaper that prevents side leakage using the following technical solutions: A side leakage-proof adult diaper comprises a top layer, an absorbent layer and a bottom layer arranged in sequence, with double-layer three-dimensional guardrails provided on both sides of the top layer, the double-layer three-dimensional guardrails comprising a first guardrail and a second guardrail, the second guardrail being arranged on the outside of the first guardrail, the first guardrail being formed by thermally bonding Tencel fiber and bicomponent fiber in a mass ratio of (0.9-1):(0.1-0.15), and the second guardrail being formed by thermally bonding Tencel fiber and bicomponent fiber in a mass ratio of (0.9-1):(0.4-0.6).

[0007] By adopting the above technical solution, the double-layer three-dimensional guardrail provides double protection against side leakage. The first guardrail and the second guardrail are both made of Tencel fiber and bicomponent fiber by thermal bonding. Tencel fiber has good softness and fluffiness, which improves the touch and comfort. The bicomponent fiber plays a role in strengthening support, improving the three-dimensional guardrail's ability to block urine and prevent side leakage, while retaining good air permeability. The Tencel fiber content of the first guardrail is higher than that of the second guardrail, which not only improves the overall softness of the double-layer three-dimensional guardrail, but also helps urine to diffuse in the first guardrail, hindering excessive concentration of urine and penetrating the second guardrail, thereby improving the effect of preventing side leakage.

[0008] Optionally, the core layer material of the bicomponent fiber is polyester, and the sheath layer material of the bicomponent fiber is polyethylene.

[0009] By adopting the above technical solution, polyester is a high-melting-point material and polyethylene is a low-melting-point material. During the hot bonding process, the cortical material partially melts, forming adhesion to the Tencel fiber, thereby forming a stable non-woven fiber web structure, maintaining good air permeability and comfortable touch.

[0010] Optionally, the fineness of the Tencel fiber is 1.4 to 1.7 dex, and the fineness of the bicomponent fiber is 2 to 3 dex.

[0011] By adopting the above technical solution, the fineness of Tencel fiber and bicomponent fiber is controlled, the air permeability and barrier properties of the enclosure structure are balanced, and the anti-side leakage function of the enclosure structure is ensured.

[0012] Optionally, the Tencel fiber includes modified Tencel fiber, which is prepared by grafting chitosan, combining with glycidyl methacrylate, and then cross-linking with isoprene.

[0013] By adopting the above technical solution, chitosan has natural antibacterial properties. After chitosan is grafted onto Tencel fiber, it can have an antibacterial effect on the protective structure. At the same time, it increases the interfacial bonding area and interfacial activity of Tencel fiber, promotes the binding of glycidyl methacrylate and the cross-linking of isoprene, forms a local polyolefin interface, reduces the polarity difference between Tencel fiber and two-component fiber, enhances the interfacial bonding force, improves the structural stability of the double-layer three-dimensional protective enclosure, and makes it more durable.

[0014] Optionally, the preparation method of the modified Tencel fiber is as follows: take acetic acid solution to dissolve chitosan to obtain a chitosan solution for standby use, add Tencel fiber to the chitosan solution, heat the reaction under the protection of inert gas, and use an oxidation-reduction initiation system to cross-link the Tencel fiber and chitosan, filter and wash after the reaction, disperse the obtained first fiber mixture in a first solvent, add glycidyl methacrylate, heat and mix to react, filter and wash after the reaction, disperse the obtained second fiber mixture in a second solvent, add isoprene and an initiator, heat and mix to react, filter and wash after the reaction, and obtain modified Tencel fiber.

[0015] By adopting the above technical solution, the main component of Tencel fiber is cellulose, and the redox initiation system causes the cellulose and chitosan to decompose to produce free radical sites, which then cross-link. After grafting chitosan, the surface of the Tencel fiber can react with glycidyl methacrylate and provide carbon-carbon double bond free radical sites to realize the polymerization grafting of isoprene, thereby realizing the modification of the Tencel fiber.

[0016] Optionally, the redox initiation system is a sodium thiosulfate / potassium persulfate system.

[0017] By adopting the above technical solution, the sodium thiosulfate / potassium persulfate system can quickly generate active free radicals at a lower temperature, significantly improving the initiation efficiency.

[0018] Optionally, the concentration of the chitosan solution is 3 g / L.

[0019] By adopting the above technical solution, the chitosan concentration is controlled, thereby controlling the rate of the chitosan grafting process and improving the grafting effect.

[0020] Optionally, the first solvent is ethanol or methanol.

[0021] Optionally, the second solvent is ethanol or methanol.

[0022] Optionally, the initiator is potassium persulfate.

[0023] Optionally, the mass ratio of the Tencel fiber, chitosan, glycidyl methacrylate and isoprene is 10:(0.3-0.5):(0.06-0.1):(0.02-0.06).

[0024] By adopting the above technical solution, the content of each modified component is controlled to meet the modification requirements of stability, high bonding strength and breathability.

[0025] Optionally, the first guardrail and the second guardrail are connected by water spunlace.

[0026] By adopting the above technical solution, the water spunlace directly entangles the fibers of the first guardrail and the second guardrail, reducing the use of adhesives. The three-dimensional entanglement structure generated by the water spunlace can evenly distribute stress, which is suitable for modified Tencel fibers and improves the stability of the double-layer three-dimensional guardrail.

[0027] Optionally, the second guardrail is provided with an elastic rubber band.

[0028] By adopting the above technical solution, the double-layer three-dimensional guardrail is tightened, maintaining the double-layer three-dimensional guardrail's anti-side leakage blocking posture on both sides.

[0029] In summary, this application has the following beneficial effects: 1. The double-layer three-dimensional guardrail of the present application provides double protection against side leakage. The first guardrail and the second guardrail are both made of Tencel fiber and bicomponent fiber by thermal bonding. Tencel fiber has good softness and fluffiness, which improves the touch and comfort. The bicomponent fiber plays a role in strengthening support, improving the three-dimensional guardrail's effect of blocking urine and preventing side leakage, while retaining good air permeability. The Tencel fiber content of the first guardrail is higher than that of the second guardrail, which not only improves the overall softness of the double-layer three-dimensional guardrail, but also helps urine to diffuse in the first guardrail, hindering excessive concentration of urine and penetrating the second guardrail, thereby improving the effect of preventing side leakage.

[0030] 2. The present application also uses modified Tencel fiber, which is grafted with chitosan. Chitosan has natural antibacterial properties. After chitosan is grafted onto Tencel fiber, it can have an antibacterial effect on the protective structure. At the same time, it increases the interfacial bonding area and interfacial activity of Tencel fiber, promotes the binding of glycidyl methacrylate and the cross-linking of isoprene, and forms a local polyolefin interface, thereby reducing the polarity difference between Tencel fiber and two-component fiber, enhancing the interfacial bonding force, and improving the structural stability of the double-layer three-dimensional protective enclosure, making it more durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a planar structural diagram of the side leakage-proof adult diaper of Example 1 of the present application.

[0032] Figure 2 This is a cross-sectional structural diagram of the side leakage-proof adult diaper of Example 1 of the present application.

[0033] Description of reference numerals: 1. Surface layer; 2. Absorbent layer; 3. Bottom layer; 4. Elastic waist; 5. Double-layer three-dimensional guardrail; 51. First guardrail; 52. Second guardrail; 53. Elastic rubber band. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-2 This application is described in further detail.

[0035] Example 1 A side leakage-proof adult diaper, such as Figure 1 and Figure 2 As shown, an adult diaper that prevents side leakage includes a surface layer 1, an absorbent layer 2 and a bottom layer 3 arranged in sequence, and double-layer three-dimensional guards 5 are bonded to both sides of the surface layer 1. The surface layer 1 is bonded to the bottom layer 3, and both ends of the surface layer 1 and the bottom layer 3 are connected with elastic waistbands 4.

[0036] The surface layer 1 and the bottom layer 3 can both be non-woven fabrics, and the absorption layer 2 can be composed of a highly absorbent resin.

[0037] like Figure 2 As shown, the double-layer three-dimensional guardrail 5 includes a first guardrail 51 and a second guardrail 52. The second guardrail 52 is arranged on the outside of the first guardrail 51. The side of the second guardrail 52 facing away from the surface layer 1 is provided with an elastic rubber band 53, which tightens the double-layer three-dimensional guardrail 5 and maintains the anti-side leakage blocking posture of the double-layer three-dimensional guardrail 5 on both sides.

[0038] The first guardrail 51 is formed by thermally bonding Tencel fiber and bicomponent fiber, while the second guardrail 52 is formed by thermally bonding Tencel fiber and bicomponent fiber. The fineness of the Tencel fiber is 1.4 dex, and the fineness of the bicomponent fiber is 2 dex. The bicomponent fiber has a sheath-core structure, with the core layer of the bicomponent fiber being polyester and the sheath layer being polyethylene.

[0039] Specifically, the hot bonding process is to mix Tencel fiber and bicomponent fiber in proportion and break them up, comb them by air flow to form a fiber web, and then the fiber web is penetrated by hot air at 135°C. The hot air melts the cortex part of the bicomponent fiber and forms a sticky force on the Tencel fiber, thereby forming a stable non-woven fiber web structure.

[0040] After the first guardrail 51 and the second guardrail 52 are formed, they are connected by water entanglement to form a double-layer three-dimensional guardrail 5 .

[0041] Tencel fiber gives the double-layer three-dimensional guard good softness and fluffiness. The two-component fiber plays a role in strengthening support, improving the three-dimensional guard's ability to block urine and prevent side leakage, while maintaining good breathability.

[0042] The first guardrail 51 is formed by heat-bonding Tencel fiber and bicomponent fiber in a mass ratio of 0.9:0.1. The second guardrail 52 is formed by heat-bonding Tencel fiber and bicomponent fiber in a mass ratio of 0.9:0.4. The Tencel fiber content of the first guardrail 51 is higher than that of the second guardrail 52. This not only improves the overall softness of the double-layer three-dimensional guardrail 5, but also helps urine diffuse within the first guardrail 51, preventing excessive urine concentration from penetrating the second guardrail 52, thereby improving the side leakage prevention effect.

[0043] Example 2 The difference between this embodiment and embodiment 1 is that the first guardrail is formed by thermally bonding Tencel fiber and bicomponent fiber in a mass ratio of 1:0.15, and the second guardrail is formed by thermally bonding Tencel fiber and bicomponent fiber in a mass ratio of 1:0.6.

[0044] The fineness of Tencel fiber is 1.7 dex, and the fineness of bicomponent fiber is 3 dex.

[0045] Example 3 The difference between this embodiment and embodiment 1 is that the Tencel fiber is modified Tencel fiber.

[0046] Preparation method of modified Tencel fiber: Tencel fiber, chitosan glycidyl methacrylate, and isoprene were weighed in a mass ratio of 10:0.3:0.06:0.02. The fineness of the Tencel fiber was 1.4 dex; the molecular weight of the chitosan was 400,000, and the degree of deacetylation was 85%.

[0047] Take 2 wt % acetic acid solution to dissolve chitosan to obtain a chitosan solution with a chitosan concentration of 3 g / L for later use.

[0048] The Tencel fibers were dispersed in a sodium thiosulfate solution with a concentration of 0.5 mol / L, and then filtered to recover the Tencel fibers after soaking for 1 hour.

[0049] Tencel fibers were dispersed and immersed in a chitosan solution. The reaction apparatus was heated to 60° C. and nitrogen was introduced for protection. Then, a potassium persulfate solution with a concentration of 0.05 mol / L was added dropwise, and the mass ratio of chitosan to potassium persulfate was controlled to be 1:0.2. After the addition was completed, the mixture was reacted for 5 hours to allow the Tencel fibers and chitosan to cross-link. After the reaction was completed, the mixture was filtered and washed with water to obtain a first fiber mixture.

[0050] The obtained first fiber mixture was dispersed in ethanol, glycidyl methacrylate was added, and the mixture was heated to 50° C. and mixed for reaction for 2 hours. After the reaction was completed, the mixture was filtered and washed with ethanol to obtain a second fiber mixture.

[0051] The obtained second fiber mixture was dispersed in ethanol, and isoprene and potassium persulfate were added, with the mass of potassium persulfate being 2% of the mass of isoprene. The mixture was heated to 60° C. for mixing reaction. After the reaction was completed, the mixture was filtered and washed with ethanol to obtain modified Tencel fiber.

[0052] Example 4 The difference between this embodiment and embodiment 3 is that the preparation composition of the modified Tencel fiber is different.

[0053] Tencel fiber, chitosan, glycidyl methacrylate and isoprene were weighed according to the mass ratio of 10:0.5:0.1:0.06.

[0054] Example 5 The difference between this embodiment and embodiment 1 is that the Tencel fiber is modified Tencel fiber.

[0055] Preparation method of modified Tencel fiber: Tencel fiber and chitosan were weighed in a mass ratio of 10:0.3. The fineness of the Tencel fiber was 1.4 dex; the molecular weight of the chitosan was 400,000, and the degree of deacetylation was 85%.

[0056] Take 2 wt % acetic acid solution to dissolve chitosan to obtain a chitosan solution with a chitosan concentration of 3 g / L for later use.

[0057] The Tencel fibers were dispersed in a sodium thiosulfate solution with a concentration of 0.5 mol / L, and then filtered to recover the Tencel fibers after soaking for 1 hour.

[0058] Tencel fibers were dispersed and immersed in a chitosan solution. The reaction apparatus was heated to 60°C and nitrogen was introduced for protection. Then, a potassium persulfate solution with a concentration of 0.05 mol / L was added dropwise, and the mass ratio of chitosan to potassium persulfate was controlled to be 1:0.2. After the addition was completed, the reaction was carried out for 5 hours to allow the Tencel fibers and chitosan to cross-link. After the reaction was completed, the fibers were filtered and washed with water to obtain modified Tencel fibers.

[0059] Example 6 The difference between this embodiment and embodiment 1 is that the Tencel fiber is modified Tencel fiber.

[0060] Preparation method of modified Tencel fiber: Tencel fiber, γ-methacryloxypropyltrimethoxysilane, and isoprene were weighed in a mass ratio of 10:0.3:0.02. The fineness of the Tencel fiber was 1.4 dex; the molecular weight of chitosan was 400,000, and the degree of deacetylation was 85%.

[0061] Tencel fibers were dispersed in ethanol, γ-methacryloxypropyltrimethoxysilane was added, and the mixture was heated to 60° C. for reaction for 1.5 h. After the reaction was completed, the fibers were filtered and washed with ethanol to recover the Tencel fibers.

[0062] The recovered Tencel was dispersed in ethanol, and isoprene and potassium persulfate were added, with the mass of potassium persulfate being 2% of the mass of isoprene. The mixture was heated to 60° C. for mixing reaction. After the reaction was completed, the mixture was filtered and washed with ethanol to obtain modified Tencel fiber.

[0063] Comparative Example 1 The difference between this embodiment and embodiment 1 is that the double-layer three-dimensional guardrail is formed by connecting two layers of first guardrails by hydroentanglement.

[0064] Comparative Example 2 The difference between this embodiment and embodiment 1 is that the double-layer three-dimensional guardrail is formed by connecting two layers of second guardrails by hydroentanglement.

[0065] Performance Testing Barrier property test: Refer to GB / T 4744-1997 "Testing and evaluating the waterproof performance of textile fabrics - Hydrostatic pressure method" to conduct a hydrostatic pressure test on the double-layer three-dimensional protective enclosure. The test is carried out until the first protective enclosure withstands the water pressure and three water seepage points appear on the back of the second protective enclosure. The higher the hydrostatic pressure, the stronger the barrier property.

[0066] Air permeability test: Refer to GB / T 5453-1997 "Determination of air permeability of textile fabrics" to test the air permeability of the double-layer three-dimensional protective enclosure. The test area is 30cm 2 , the test pressure is 125Pa, the higher the air permeability, the better the air permeability.

[0067] Softness test: Use a fabric softness tester to test the softness of the double-layer three-dimensional guardrail. The higher the softness, the better the softness.

[0068] Breaking strength test: Use a universal testing machine to stretch the double-layer three-dimensional guardrail at a speed of 300mm / min. The higher the breaking strength, the more stable the structure.

[0069] The above test results are shown in Table 1.

[0070] Table 1 Combined with the test results in Table 1, and comparing Example 1 with Comparative Example 1 and Comparative Example 2, it can be seen that the double-layer three-dimensional guardrail obtained by using different proportions of Tencel fiber and bicomponent fiber is better than the double-layer guardrail with the same proportion of Tencel fiber and bicomponent fiber. It improves the overall softness of the double-layer three-dimensional guardrail, helps urine to diffuse in the first guardrail, prevents urine from being excessively concentrated and penetrating the second guardrail, and is better in terms of barrier properties, breathability, softness and structural stability, that is, it meets the requirements of preventing side leakage and improving comfort at the same time.

[0071] By comparing Example 1 with Example 3, it can be seen that the modified Tencel fiber is used to prepare the double-layer three-dimensional protective enclosure. Since the compatibility of the modified Tencel fiber and the two-component fiber is improved, the barrier properties, air permeability, softness and structural stability of the double-layer three-dimensional protective enclosure are further improved. Compared with Example 5 and Example 6, it can be seen that the Tencel fiber is best modified by combining it with glycidyl methacrylate after chitosan grafting and then cross-linking with isoprene.

[0072] This specific implementation manner is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the specific implementation manner as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. An adult diaper that prevents side leakage, characterized by: The invention comprises a surface layer (1), an absorption layer (2) and a bottom layer (3) which are arranged in sequence. A double-layer three-dimensional guardrail (5) is arranged on both sides of the surface layer (1). The double-layer three-dimensional guardrail (5) comprises a first guardrail (51) and a second guardrail (52). The second guardrail (52) is arranged on the outside of the first guardrail (51). The first guardrail (51) is formed by thermally bonding tencel fiber and bicomponent fiber in a mass ratio of (0.9-1):(0.1-0.15). The second guardrail (52) is formed by thermally bonding tencel fiber and bicomponent fiber in a mass ratio of (0.9-1):(0.4-0.6).

2. The side leakage-proof adult diaper according to claim 1, characterized in that: The core layer material of the bicomponent fiber is polyester, and the sheath layer material of the bicomponent fiber is polyethylene.

3. The side leakage-proof adult diaper according to claim 1, characterized in that: The fineness of the Tencel fiber is 1.4-1.7 dex, and the fineness of the bicomponent fiber is 2-3 dex.

4. The side leakage-proof adult diaper according to claim 1, characterized in that: The tencel fiber comprises modified tencel fiber, which is prepared by grafting chitosan, combining with glycidyl methacrylate, and then cross-linking with isoprene.

5. The side leakage-proof adult diaper according to claim 4, characterized in that: The preparation method of the modified Tencel fiber comprises the following steps: dissolving chitosan in an acetic acid solution to obtain a chitosan solution for standby use; adding Tencel fiber to the chitosan solution; heating the solution for reaction under the protection of an inert gas; and cross-linking the Tencel fiber and chitosan through a redox initiation system; filtering and washing the mixture after the reaction; dispersing the obtained first fiber mixture in a first solvent; adding glycidyl methacrylate; heating and mixing for reaction; filtering and washing the mixture after the reaction; dispersing the obtained second fiber mixture in a second solvent; adding isoprene and an initiator; heating and mixing for reaction; filtering and washing the mixture after the reaction to obtain the modified Tencel fiber.

6. The side leakage-proof adult diaper according to claim 5, characterized in that: The redox initiation system is a sodium thiosulfate / potassium persulfate system.

7. The side leakage-proof adult diaper according to claim 4, characterized in that: The mass ratio of the Tencel fiber, chitosan, glycidyl methacrylate and isoprene is 10:(0.3-0.5):(0.06-0.1):(0.02-0.06).

8. The side leakage-proof adult diaper according to claim 1, characterized in that: The first guardrail (51) and the second guardrail (52) are connected by water entanglement.

9. The side leakage-proof adult diaper according to claim 1, characterized in that: The second guard (52) is provided with an elastic rubber band (53).

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