A composite moisturizing tissue and a method for preparing a moisturizing tissue

Abstract

The application relates to the field of moisturizing tissue paper technology, in particular to a composite moisturizing tissue paper and a preparation method thereof, which comprises two skin-adhesive layers and a liquid-absorbing layer arranged between the two skin-adhesive layers. The two skin-adhesive layers are both shaped into a plurality of spaced-apart liquid-guiding points, each of which is connected to the liquid-absorbing layer in a capillary liquid-guiding mode. A plurality of moisturizing cream-containing moisturizing areas are arranged between each of the two skin-adhesive layers and the liquid-absorbing layer. The moisturizing areas and the adjacent liquid-guiding points are distributed in a staggered mode, and the moisturizing cream addition amount at the liquid-guiding points is lower than that of the moisturizing areas, so that external liquid can not rapidly take the moisturizing and lubricating components on the skin-adhesive surface into the tissue paper, and the composite moisturizing tissue paper can still maintain a relatively low skin-adhesive friction after absorbing liquid.

Description

Technical Field

[0001] This application relates to the field of moisturizing tissue technology, and in particular to a composite moisturizing tissue and a method for preparing the moisturizing tissue. Background Technology

[0002] Composite moisturizing tissues typically incorporate functional components with moisturizing, softening, or skin-care properties within multiple layers of paper base. Alternatively, moisturizing creams may be coated, sprayed, or laminated onto the paper base surface and between adjacent paper layers. This allows the tissues to maintain basic absorbency and strength while reducing surface roughness and wiping resistance. They are primarily used for infant care, nasal cleaning, sensitive skin wiping, and other high-frequency paper usage scenarios.

[0003] Research on moisturizing tissues has evolved from simply adding moisturizing liquid to the surface of ordinary tissues to a more sophisticated approach that integrates cream formulations, coating equipment, specialized base paper, and multi-layer composite processes. For example, invention patent CN114983833B discloses a slippery cream paper and its preparation method. This method uses a slippery cream composition containing moisturizing factors, benzyl ammonium salt compounds, softeners, additives, and solvents. After mixing, stirring, and homogenizing the raw materials, the cream composition is atomized and laminated onto the paper surface using a spray-type laminator to improve the paper's moisturizing, soft, and antibacterial properties.

[0004] For example, the invention patent with announcement number CN116463886B discloses a method for preparing cream-coated tissue paper base paper. It uses bamboo pulp and hardwood pulp as fiber raw materials, refines the bamboo pulp but does not refine the hardwood pulp, and controls the pulp ratio, creping doctor blade angle, creping rate, paper machine speed and longitudinal elongation of the paper to balance the papermaking performance, post-processing performance and use performance of cream-coated tissue paper base paper.

[0005] As can be seen from the existing technology described above, the current improvements to composite moisturizing tissues mainly focus on the following aspects: First, improving the moisturizing properties and initial smoothness of the tissues through glycerin, propylene glycol, hyaluronic acid, amino acids, softeners, or emollients; second, improving the uniformity of cream application on the paper surface and continuous production capacity through spray, roller coating, or spray lamination equipment; and third, improving the adaptability of the base paper to post-processing of creams by adjusting fiber raw materials, pulping methods, crease rate, and elongation.

[0006] However, when tissues come into contact with nasal mucus, tears, sweat, or other foreign liquids, these liquids wet the paper and dissolve the water-soluble moisturizing components on the paper's surface. These components then migrate along the paper's capillaries into the interior of the paper. Simultaneously, the paper fibers absorb water, swell, and collapse, compressing the paper's original fluffy, wrinkled structure and increasing the actual contact area between the tissue and the skin. Consequently, the effective lubricating components on the tissue surface decrease, while the contact between the moistened paper fibers and the moistened skin increases.

[0007] Therefore, in real-world scenarios such as rhinitis patients blowing their noses repeatedly, infants cleaning their mouths and noses, or repeatedly wiping moist skin, existing moisturizing tissues may initially feel smooth but gradually become tacky after absorbing liquid. This can further lead to issues such as the tissue sticking to the skin, fibers becoming fuzzy and shedding, and redness or stinging around the nose or mouth, thus reducing the user experience. Summary of the Invention

[0008] In order to prevent external liquids from quickly carrying the moisturizing and lubricating components of the skin-contacting surface into the tissue paper, and to ensure that the composite moisturizing tissue paper can still maintain low skin-contact friction after absorbing liquids, this application provides a composite moisturizing tissue paper and a method for preparing the moisturizing tissue paper.

[0009] Firstly, the composite moisturizing tissue paper provided in this application adopts the following technical solution.

[0010] A composite moisturizing tissue includes two skin-adhering layers and an absorbent layer disposed between the two skin-adhering layers. Each skin-adhering layer has multiple spaced-apart liquid-guiding points, and each liquid-guiding point forms a capillary liquid-guiding connection with the absorbent layer. Each skin-adhering layer and the absorbent layer have multiple moisturizing cream storage areas. The moisturizing areas are staggered from the adjacent liquid-guiding points, and the amount of moisturizing cream added at the liquid-guiding points is lower than the amount of moisturizing cream added in the moisturizing areas.

[0011] By adopting the above technical solution, when any side of the tissue comes into contact with nasal mucus, tears, sweat, or other foreign liquids, the foreign liquid can preferentially enter the absorbent layer through the liquid-guiding points on the corresponding skin-contact layer, reducing the residence time of foreign liquid on the outer surface of the skin-contact layer and decreasing the probability of foreign liquid directly washing away the moisture-retaining area. The moisture-retaining area and the liquid-guiding points are staggered, separating the introduction path of foreign liquid from the storage path of moisturizing cream, reducing the migration of moisturizing cream into the absorbent layer with foreign liquid. When the tissue is pressed and wiped, the moisturizing cream in the moisture-retaining area can transfer to the corresponding skin-contact layer, thereby continuing to improve the lubrication of the skin-contact surface after the tissue has absorbed liquid, reducing friction between the moistened paper fibers and the skin.

[0012] Optionally, the liquid guiding point is a compacted area formed on the corresponding skin layer. The paper density of the liquid guiding point is higher than the paper density of the area between adjacent liquid guiding points in the corresponding skin layer, and the side of the liquid guiding point facing the liquid absorption layer is in contact with the liquid absorption layer.

[0013] By adopting the above technical solution, the skin-adhesive layer forms relatively dense fiber pores at the liquid-conducting points and contacts the absorbent layer, allowing external liquid to be transferred to the absorbent layer along the capillary pathways formed by the liquid-conducting points. The area between adjacent liquid-conducting points still maintains a relatively loose paper structure, which can balance the liquid-conducting ability and skin-adhesive softness of the tissue. There is no need to open through holes in the skin-adhesive layer, reducing the possibility of scratching the skin by the edges of the through holes.

[0014] Optionally, the total area of ​​the liquid infusion points accounts for 4%-18% of the skin-adhesive layer area.

[0015] By adopting the above technical solution, the total area of ​​the liquid-conducting points is limited to the aforementioned range. This ensures that the skin-adhesive layer forms a sufficient number of capillary liquid-conducting positions to promptly transfer external liquid to the absorbent layer, while also preventing the compacted area from becoming too large, which would cause the entire skin-adhesive layer to harden. When the total area of ​​the liquid-conducting points is too small, the liquid transfer speed is insufficient; when the total area of ​​the liquid-conducting points is too large, the fluffy area in the skin-adhesive layer decreases, easily reducing the softness of the tissue.

[0016] Optionally, the lubrication storage zones on both sides of the liquid absorption layer are arranged in a staggered manner.

[0017] By adopting the above technical solution, the moisture storage areas located on both sides of the absorbent layer will not overlap concentratedly along the thickness direction of the paper towel. This disperses the amount of moisturizing cream inside the paper towel and reduces local thickness, minimizing cream seepage, paper layer adhesion, or the formation of hard spots due to localized pressure during folding, stacking, packaging, and extraction. Simultaneously, the staggered arrangement preserves areas in the absorbent layer not simultaneously affected by cream from both sides, thus maintaining the continuous liquid-conducting capacity of the absorbent layer.

[0018] Optionally, a relocation-prevention zone may be set up around the reservoir area, with the mass percentage of the retaining components contained in the relocation-prevention zone being higher than the mass percentage of the retaining components contained in the corresponding reservoir area.

[0019] By adopting the above technical solution, the anti-migration edge, with a higher proportion of retaining components, can limit the lateral migration of moisturizing cream to the liquid-conducting points, the edges of the skin-adhesive layer, and adjacent paper layers during storage and transportation, reducing the possibility of the liquid-conducting points being covered by moisturizing cream and thus reducing the liquid-conducting capacity. The lower proportion of retaining components within the moisture storage area allows the moisturizing cream in the moisture storage area to still transfer to the skin-adhesive layer when the tissue is pressed or sheared during wiping, thus balancing cream stability during storage and cream release during use.

[0020] Optionally, the moisturizing cream includes a hydrophilic moisturizing phase, a water-insoluble lubricating phase, and a retaining phase; the hydrophilic moisturizing phase includes at least one of glycerin, 1,3-propanediol, sorbitol, and trehalose; the water-insoluble lubricating phase includes at least one of vegetable oil, hydrogenated vegetable oil, emollient ester, squalane, and polydimethylsiloxane; and the retaining phase includes at least one of fatty acid glycerides, fatty alcohols, cellulose nanofibers, and polymeric thickeners.

[0021] By employing the above technical solutions, the hydrophilic moisturizing phase improves the moisturizing feel of the tissue paper upon contact with the skin, while the water-insoluble lubricating phase is less likely to be completely dissolved by external liquids and carried into the absorbent layer, maintaining a certain degree of wet lubrication even after some hydrophilic moisturizing components have migrated. The retaining phase enhances the retention capacity of the moisturizing cream within the storage area, reducing disordered migration of the moisturizing cream during packaging and storage. The hydrophilic moisturizing phase, the water-insoluble lubricating phase, and the retaining phase work together to give the moisturizing cream the effects of moisturizing, wet lubrication, and stable storage.

[0022] Optionally, the wet tensile strength of the absorbent layer is higher than that of the skin-adhesive layer.

[0023] By adopting the above technical solution, the absorbent layer can still support the two skin-contact layers after absorbing external liquid, reducing the stretching, deformation, tearing, and lint shedding of the paper towel during wet wiping. The skin-contact layer maintains a relatively low wet tensile strength requirement, which helps to maintain a softer skin-contact feel, while the absorbent layer undertakes the main function of maintaining the wet structure, allowing the paper towel to maintain both softness and wet integrity.

[0024] Secondly, the method for preparing a moisturizing tissue provided in this application adopts the following technical solution.

[0025] A method for preparing a moisturizing tissue, used to prepare the above-mentioned composite moisturizing tissue, specifically includes the following steps:

[0026] S1. Multiple spaced liquid guiding points are formed on the two skin-adhesive layers;

[0027] S2. Multiple moisturizing cream storage areas are formed on the inner surface of the two skin-adhesive layers respectively, so that each moisturizing cream storage area is staggered from the adjacent liquid guiding point, and the amount of moisturizing cream added at the liquid guiding point is lower than the amount of moisturizing cream added in the moisturizing cream storage area.

[0028] S3. Align and combine the two skin-adhering layers and the liquid-absorbing layer in sequence, so that the liquid-conducting points and the liquid-absorbing layer form a capillary liquid-conducting connection.

[0029] S4. Shaping treatment.

[0030] By employing the above technical solution, liquid-conducting points are first formed on both skin-adhesive layers, and then a moisture-retaining area is formed in a location avoiding the liquid-conducting points. This allows for control of the liquid-conducting position and the application position of the moisturizing cream before lamination. Through alignment lamination, the liquid-conducting points on both skin-adhesive layers form stable capillary connections with the intermediate absorbent layer, while the moisture-retaining area is maintained between the skin-adhesive layer and the absorbent layer. After shaping treatment, the moisturizing cream is retained within the moisture-retaining area and transferred to the skin-adhesive layer during use by pressing or wiping, thus forming a composite tissue structure where the liquid-conducting path and the moisture-retaining path are separated.

[0031] Optionally, S2 maintains a cream-free gap between the lubrication reservoir and adjacent liquid delivery points when forming the lubrication reservoir.

[0032] By adopting the above technical solution, the cream-free separator can further separate the moisturizing area from the liquid guiding point, reducing the amount of moisturizing cream covering the liquid guiding point during coating, lamination, curing, and storage, and ensuring the continuity of the capillary liquid guiding path between the liquid guiding point and the absorbent layer. At the same time, the cream-free separator can reduce the possibility of foreign liquid directly contacting and washing away the moisturizing area when it enters the liquid guiding point, so that the moisturizing area can still retain some moisturizing cream after the tissue absorbs the liquid.

[0033] Optionally, in S2, a graded coating method is used to form the moisture storage area. First, a first cream is coated around each moisture storage area to form an anti-migration edge. Then, a second cream is coated within the area enclosed by the anti-migration edge to form the moisture storage area. The mass percentage of the retaining component in the first cream is higher than that in the second cream.

[0034] By adopting the above technical solution, the anti-migration edge formed by the first cream has a high retention capacity, which can limit the migration of the second cream to the periphery of the moisture storage area during storage and transportation, reducing the cream from entering the liquid delivery point or seeping out of the paper towel edge. The second cream has a lower mass ratio of the retaining component, making it more prone to deformation and transfer when the paper towel is subjected to pressing or wiping shearing action. This results in a differentiated structure in the moisture storage area that is stable on the outside and easily released on the inside, taking into account both the storage stability and release properties of the cream during use.

[0035] In summary, this application includes at least the following beneficial effects:

[0036] The liquid delivery points and the moisturizing storage area are staggered, which separates the path of external liquid delivery from the path of moisturizing cream storage. This reduces the likelihood of external liquid quickly carrying the moisturizing cream from the skin into the tissue, allowing the tissue to maintain low friction against the skin even after absorbing the liquid.

[0037] The compacted liquid-conducting points can form capillary liquid-conducting connections with the absorbent layer without damaging the integrity of the skin-contact layer surface, thus balancing liquid transfer capability and tissue softness.

[0038] The staggered arrangement of the moisture storage areas on both sides of the absorbent layer can disperse the amount of cream in the thickness direction of the paper towel, reduce localized seepage, adhesion and hard spots, and help maintain the continuous liquid conduction capacity of the absorbent layer.

[0039] The anti-migration edge and the moisture storage area form a differentiated structure that is fixed on the outside and easily released on the inside, which can limit the migration of cream during storage and allow the cream to transfer to the skin layer during use;

[0040] The hydrophilic moisturizing phase, the water-insoluble lubricating phase, and the retaining phase work together to improve the initial moisturizing feel, while also ensuring that the tissue remains moist and lubricated after contact with external liquids, and improving the storage stability of the moisturizing cream.

[0041] A wet absorbent layer with high tensile strength can support the two skin-adhesive layers after absorbing liquid, reducing tearing, deformation, and lint during wet wiping. Attached Figure Description

[0042] Figure 1 This is a cross-sectional view of a composite moisturizing tissue paper along its thickness.

[0043] Figure 2 This is a flowchart of a method for preparing moisturizing tissue paper.

[0044] Explanation of the attached diagram labels: 1. Adhesive layer; 2. Liquid-absorbing layer; 3. Liquid-conducting point; 4. Lubrication reservoir; 5. Anti-migration edge. Detailed Implementation

[0045] The present application will be further described in detail below with reference to the accompanying drawings.

[0046] This application discloses a composite moisturizing tissue, with reference to... Figure 1 It includes two skin-adhesive layers 1 and an absorbent layer 2 disposed between the two skin-adhesive layers 1. The two skin-adhesive layers 1 respectively constitute the two outer surfaces of the tissue, so that the tissue can achieve liquid introduction and moisturizing lubrication no matter which side of the tissue comes into contact with the skin.

[0047] Both skin layers 1 can be made from crepe paper base paper. The raw materials for skin layer 1 are mainly bleached hardwood pulp and bleached softwood pulp. Bleached hardwood pulp provides finer surface fibers and better skin softness, while bleached softwood pulp improves the longitudinal tensile strength and processing stability of the paper layer. In this application, based on 100 parts by weight of the total oven-dry fiber mass used in skin layer 1, bleached hardwood pulp accounts for 80 parts by weight and bleached softwood pulp accounts for 20 parts by weight. The basis weight of a single layer of skin layer 1 is 14 g / m². 2 The thickness of a single layer is 0.13mm.

[0048] The absorbent layer 2 uses absorbent base paper with wet-state support capabilities. Based on 100 parts by weight of the total oven-dry fiber mass used in the absorbent layer 2, 70 parts by weight of bleached hardwood pulp and 30 parts by weight of bleached softwood pulp are added, along with a wet-strength agent at 0.45% of the oven-dry fiber mass. The wet-strength agent is a polyamide polyamine epichlorohydrin wet-strength agent suitable for tissue paper, used to improve the structural integrity of the absorbent layer 2 after absorbing nasal mucus, tears, sweat, or moisture. The amount of wet-strength agent used is controlled within a range that can improve wet tensile strength without significantly reducing the absorption rate.

[0049] In this application, the quantitative amount of the absorbent layer 2 can be 20 g / m³. 2The absorbent layer 2 has a thickness of 0.20 mm and its wet tensile strength is higher than that of the skin layer 1. The absorbent layer 2 provides the main wet support after the paper towel absorbs liquid, reducing the stretching, cracking, fuzzing, and shedding of the two skin layers 1 during wiping.

[0050] Reference Figure 1 Multiple spaced liquid-conducting points 3 are formed on both skin-adhesive layers 1. Each liquid-conducting point 3 is a locally compacted area on the skin-adhesive layer 1, and the inter-fiber pores at the liquid-conducting point 3 are smaller than the inter-fiber pores between adjacent liquid-conducting points 3 in the skin-adhesive layer 1. Each liquid-conducting point 3 has its side facing the absorbent layer 2 in contact with the absorbent layer 2, forming a continuous capillary connection between the liquid-conducting points 3 and the absorbent layer 2. After the outer surface of the tissue comes into contact with liquid, the liquid preferentially enters the liquid-conducting points 3 with smaller fiber pores and is transferred along the liquid-conducting points 3 to the absorbent layer 2.

[0051] In this application, the liquid guiding points 3 are circular. Multiple liquid guiding points 3 are distributed in a rectangular array, and the total area of ​​the liquid guiding points 3 accounts for 4%-18% of the area of ​​the corresponding skin-adhesive layer 1. In other embodiments, the liquid guiding points 3 may be elliptical, short strip-shaped, or rounded polygonal.

[0052] Reference Figure 1 The thickness of the skin-adhesive layer 1 after being compacted at the liquid-conducting point 3 is 50-60% of the thickness of the adjacent uncompacted area. This degree of compaction ensures stable contact between the liquid-conducting point 3 and the liquid-absorbing layer 2, while preventing the formation of hard protrusions at the liquid-conducting point 3.

[0053] Reference Figure 1 Each of the two skin-adhering layers 1 has multiple moisturizing reservoirs 4 on its inner surface facing the absorbent layer 2. The moisturizing reservoirs 4 are located between the skin-adhering layer 1 and the absorbent layer 2, and contain moisturizing cream. The moisturizing reservoirs 4 are staggered from adjacent liquid guiding points 3. The moisturizing reservoirs 4 do not cover the liquid guiding points 3, and a cream-free gap is maintained between the moisturizing reservoirs 4 and adjacent liquid guiding points 3.

[0054] In this application, no moisturizing cream is applied to the liquid guiding point 3, and the amount of moisturizing cream added to the liquid guiding point 3 is zero. There is a cream-free gap between the moisture storage area 4 and the adjacent liquid guiding point 3. This cream-free gap prevents moisturizing cream from entering the liquid guiding point 3 during coating, lamination, and storage, reducing the possibility of moisturizing cream clogging the capillary pores of the liquid guiding point 3. Simultaneously, when the paper towel comes into contact with external liquid, the liquid can first enter the absorbent layer 2 through the liquid guiding point 3, rather than first rinsing the moisture storage area 4.

[0055] The lubrication storage area 4 can be elliptical, and multiple lubrication storage areas 4 are distributed in an intermittent array. The total area of ​​the lubrication storage area 4 accounts for 18%-25% of the area of ​​the corresponding skin layer 1.

[0056] Reference Figure 1The moisture-retaining area 4 on one side of the absorbent layer 2 and the moisture-retaining area 4 on the other side of the absorbent layer 2 are staggered along the thickness direction of the tissue. After the staggered arrangement, the overlapping area of ​​the projection of the upper and lower moisture-retaining areas 4 onto the absorbent layer 2 is no more than 20% of the area of ​​a single moisture-retaining area 4. This avoids the two moisture-retaining areas 4 from overlapping in the thickness direction of the tissue, reducing the amount of cream and excessive thickness in some areas inside the tissue. When the tissue is folded, stacked, and packaged, the staggered arrangement can also distribute the stacking load borne by the moisture-retaining areas 4, reducing premature seepage of moisturizing cream, adhesion between adjacent tissues, and the formation of local hard spots on the paper surface.

[0057] Reference Figure 1 Each moisture storage zone 4 is surrounded by an anti-migration edge 5. The anti-migration edge 5 is formed by the first cream, and the moisture storage zone 4 is formed by the second cream. The anti-migration edge 5 is a ring-shaped boundary extending around the periphery of the moisture storage zone 4, and the width of the anti-migration edge 5 is 0.3-0.5 mm. The mass percentage of the retaining component contained in the anti-migration edge 5 is higher than the mass percentage of the retaining component contained in the second cream in the moisture storage zone 4.

[0058] The first cream has a high shape retention capacity at room temperature, which helps to limit the migration of the second cream along the inner surface of the skin layer 1 to the liquid point 3 or the edge of the tissue. The second cream can undergo plastic deformation when the tissue is subjected to pressing, bending, and wiping shearing, and transfers to the corresponding outer surface through the fiber pores of the skin layer 1.

[0059] The thickness of the anti-migration edge 5 is less than or equal to the thickness of the second cream at the center of the moisture storage area 4, so as to avoid the anti-migration edge 5 forming a hard edge on the surface of the paper towel that can be clearly perceived by the user.

[0060] Moisturizing creams consist of a hydrophilic moisturizing phase, a water-insoluble lubricating phase, and a retaining phase.

[0061] The hydrophilic moisturizing phase absorbs and retains moisture, improving the moisturizing feel of the tissue when it comes into contact with skin. The water-insoluble lubricating phase continues to provide lubrication after the tissue comes into contact with mucus, tears, or moisture. The retaining phase controls the flowability of the cream, reducing disordered migration of the cream during storage and transportation.

[0062] In this application, the second cream comprises, by weight, 28 parts glycerin, 8 parts 1,3-propanediol, 3 parts trehalose, 12 parts caprylic / capric triglyceride, 4 parts squalane, 4 parts hydrogenated vegetable oil, 3.5 parts glyceryl stearate, 2.5 parts cetearyl alcohol, 0.3 parts hydroxyethyl cellulose, 0.2 parts cellulose nanofibers, 0.6 parts phenoxyethanol, 0.2 parts ethylhexylglycerin, 0.1 parts citric acid, and 33.6 parts deionized water.

[0063] The pH of the second cream is controlled between 5.0 and 5.8. At room temperature, the second cream is semi-solid, but it is fluid at the application temperature. The water-insoluble lubricating phase in the second cream will not immediately dissolve completely upon contact with a small amount of mucus, tears, or moisture. Even if some glycerin, 1,3-propanediol, and trehalose migrate with the liquid to the absorbent layer 2, some caprylic / capric triglycerides, squalane, and hydrogenated vegetable oil remain in the skin-adhesive layer 1 to maintain lubrication during wet wiping.

[0064] The first cream comprises, by weight, 20 parts glycerin, 5 parts 1,3-propanediol, 8 parts caprylic / capric triglyceride, 15 parts hydrogenated vegetable oil, 12 parts glyceryl stearate, 10 parts cetearyl alcohol, 0.4 parts hydroxyethyl cellulose, 0.3 parts cellulose nanofibers, 0.6 parts phenoxyethanol, 0.2 parts ethylhexylglycerin, 0.1 parts citric acid, and 28.4 parts deionized water.

[0065] The total mass percentage of hydrogenated vegetable oil, glyceryl stearate, cetearyl alcohol, and cellulose nanofibers in the first cream is higher than that in the second cream, resulting in a higher retention capacity of the first cream at room temperature. After the first cream forms the anti-migration edge 5, it restricts the flow of the second cream to the periphery of the moisture storage area 4 under the influence of paper towel stacking pressure and ambient temperature changes. Because the anti-migration edge 5 is relatively narrow and contains glycerin, 1,3-propanediol, and caprylic / capric triglycerides, it does not develop a noticeable hard, plastic-like feel.

[0066] In other embodiments, the hydrophilic moisturizing phase may also be sorbitol, the water-insoluble lubricating phase may also be other vegetable oils, emulsifying esters or polydimethylsiloxane, and the retaining phase may also be other fatty acid glycerides, fatty alcohols or polymeric thickeners suitable for skin contact products.

[0067] The skin-adhesive layer 1 and the absorbent layer 2 are mainly bonded in a dotted pattern in the area where the liquid guiding point 3 is located and in the blank area outside the moisture storage area 4. No pressing protrusions are set on the composite roller corresponding to the moisture storage area 4 to avoid direct compression of the moisture storage area 4 during the lamination process. After being pressed by the composite roller, the liquid guiding point 3 remains in contact with the absorbent layer 2 on its side facing the absorbent layer 2, forming a stable capillary liquid guiding connection between the skin-adhesive layer 1 and the absorbent layer 2. A discontinuous embossed connection area with a width of 1-3 mm can also be set at the edge of the tissue to improve the overall connection stability of the three-layer paper web. The edge embossed connection area does not form a continuous sealed edge to avoid affecting the overall softness of the tissue and the lateral diffusion of liquid.

[0068] This application can employ mechanical embossing lamination without using large-area adhesives. If further improvement in interlayer stability is required, a small amount of water-based adhesive suitable for tissue paper can be applied to the liquid guiding point 3 or the edge of the tissue paper, but the adhesive must not cover the moisture storage area 4 or block the capillary pores of the liquid guiding point 3.

[0069] This application also discloses a method for preparing moisturizing tissue paper, referring to... Figure 2 Specifically, it includes the following steps.

[0070] S1, forming liquid conduction point 3.

[0071] Prepare or provide two skin-coating paper webs and one absorbent paper web. The two skin-coating paper webs are used to form two skin-coating layers 1, and the absorbent paper web is used to form an absorbent layer 2. Equilibrate the two skin-coating paper webs in an environment with a temperature of 20-28℃ and a relative humidity of 45%-65% for at least 4 hours to stabilize the moisture content of the two skin-coating paper webs and reduce dimensional changes caused by different moisture contents of the paper webs during subsequent compaction and coating processes.

[0072] Two bonding paper webs are locally compacted using compaction rollers with circular protrusions. The gap between the compaction rollers and the bearing rollers is adjusted according to the thickness of the bonding paper web to control its thickness at the liquid guide point 3. The compaction process does not cut the fibers in the bonding paper web, nor does it create through-holes penetrating the web. After compaction, the liquid guide point 3 maintains a continuous paper structure to prevent scratching of the bonding paper web by the edges of any through-holes.

[0073] After compaction is completed, the position of the liquid guiding point 3 is recorded by online visual inspection, which serves as the position reference for subsequent coating of the lubrication storage area 4 and the alignment and lamination of the three-layer paper web.

[0074] S2, forming a moisture storage zone 4.

[0075] First, prepare the first cream and the second cream.

[0076] To prepare the second cream, deionized water, glycerin, 1,3-propanediol, and trehalose were added to the aqueous phase tank, heated to 70-75°C, and stirred until the trehalose was fully dissolved. Hydroxyethyl cellulose, pre-dispersed with a portion of glycerin, was added to the aqueous phase tank and stirred until no significant agglomerates were observed in the aqueous phase; subsequently, cellulose nanofibers were added and dispersed. Caprylic / capric triglycerides, squalane, hydrogenated vegetable oil, glyceryl stearate, and cetearyl alcohol were added to the oil phase tank and heated to 75-80°C until all solid components melted and were uniformly mixed. Maintaining a temperature difference between the aqueous and oil phases of no more than 5°C, the oil phase was slowly added to the aqueous phase, and a high-speed shear emulsifier was used at 3000-6000 rpm for 5-10 minutes. After emulsification, the mixture was cooled under continuous low-speed stirring. When the material temperature dropped below 45°C, phenoxyethanol, ethylhexylglycerin, and citric acid were added, and stirring continued until homogeneous to obtain the second cream.

[0077] When preparing the first cream, the aqueous phase and oil phase are prepared separately according to the first cream formula. Since the first cream contains a high content of hydrogenated vegetable oil, glyceryl stearate and cetearyl alcohol, the heating temperature of the oil phase is controlled at 78-82℃, and after emulsification, it remains in a coatable state at 55-65℃.

[0078] A two-stage gravure coating process is used to form a moisture-retaining zone 4 on the inner surface of two bonding paper webs. The first stage coating applies a first cream to the periphery of the moisture-retaining zone 4 to form an anti-migration edge 5. The second stage coating applies a second cream to the area enclosed by the anti-migration edge 5 to form the moisture-retaining zone 4. The coating temperature of the first cream is controlled at 55-65℃, and the coating temperature of the second cream is controlled at 45-55℃, ensuring that both creams can be stably transferred to the inner surface of the bonding paper web without excessive penetration due to excessively high temperatures.

[0079] The total amount of moisturizing cream applied to each side of the skin-adhesive sheet is 2-4g / m². 2。 The first cream accounts for 20%-30% of the total amount of moisturizing cream applied to the corresponding side, and the second cream accounts for 70%-80% of the total amount of moisturizing cream applied to the corresponding side.

[0080] During application, the area where the liquid delivery point 3 is located is not coated with the first cream or the second cream, and a cream-free gap is maintained between the lubrication reservoir 4 and the adjacent liquid delivery point 3.

[0081] The lubrication storage areas 4 on the two skin-coated paper webs adopt different registration phases, so that after the two skin-coated paper webs are combined, the lubrication storage areas 4 on both sides of the absorbent layer 2 can be staggered by half an arrangement cycle along the length of the paper web.

[0082] After coating, the skin paper web is cooled and conveyed to reduce the surface temperature of the skin paper web to below 35°C, so that the anti-migration edge 5 is initially shaped and the flow of the moisture storage area 4 is reduced before entering the lamination station.

[0083] S3, para-complex.

[0084] One skin-adhesive paper web, one absorbent paper web, and another skin-adhesive paper web are sequentially introduced into the lamination station to form the layering sequence of skin-adhesive layer 1, absorbent layer 2, and skin-adhesive layer 1.

[0085] The two skin-adhesive paper webs have the moisture storage area 4 facing the absorbent paper web, so that the moisture storage area 4 is located between the skin-adhesive layer 1 and the absorbent layer 2 respectively.

[0086] Based on the position of the liquid guiding point 3 recorded in S1 and the position of the moisture storage area 4 in S2, the three paper webs are aligned so that the liquid guiding points 3 on the two skin-coated paper webs contact the liquid-absorbing paper webs respectively, and the moisture storage area 4 avoids the composite embossing position.

[0087] The embossing protrusions on the composite roller correspond to the positions of the liquid guiding points 3. The composite roller performs point-like pressing in the area where the liquid guiding points 3 are located, ensuring stable contact between the skin layer 1 and the absorbent layer 2 at the liquid guiding points 3. An anti-gaps area is provided on the composite roller at the corresponding position of the moisture storage area 4, preventing the direct application of concentrated pressure to the moisture storage area 4. This avoids premature extrusion of the second cream during the paper web lamination process.

[0088] If necessary, intermittent embossing connection areas are set at the transverse edges of the paper web to prevent significant misalignment of the three layers of paper web during subsequent folding and cutting.

[0089] S4. Shaping treatment.

[0090] The laminated paper web first passes through a cooling section to lower its temperature to 25-30℃. After cooling, the first cream forms a relatively stable anti-migration edge 5, and the second cream forms a semi-solid moisture-retaining state that can maintain its shape at room temperature and spread out under pressure.

[0091] After cooling, the paper web is equilibrated and cured for 12-24 hours in an environment with a temperature of 20-30℃ and a relative humidity of 45%-65%. During the curing process, some of the second cream enters the inner region of the skin layer 1 in the thickness direction, but does not form a continuous cream film on the outer surface of the skin layer 1. By controlling the viscosity of the second cream, the coating temperature, and the curing time, the second cream is mainly kept on the inner surface of the skin layer 1 and in the moisture storage area 4.

[0092] The cured composite paper web is rewound under low pressure. The rewinding pressure rollers do not apply excessive radial pressure to the paper roll to prevent frost seepage from the moisture storage zone 4 inside the paper roll due to long-term pressure. After rewinding, the paper is slit, folded, and packaged according to product specifications.

[0093] The following detailed description is provided in conjunction with specific embodiments and comparative examples.

[0094] Example 1:

[0095] Based on the above-mentioned composite moisturizing tissue and its preparation method, the variables that need to be controlled are as follows: the liquid guiding point 3 is circular with a diameter of 1.2 mm, the center distance between adjacent liquid guiding points 3 is 5 mm, and the total area of ​​the liquid guiding points 3 accounts for 4% of the area of ​​the corresponding skin-adhesive layer 1. The thickness of the liquid guiding points 3 after compaction is 55% of the thickness of the adjacent uncompacted area.

[0096] The lubrication reservoir 4 is elliptical in shape, and its total area accounts for 22% of the area of ​​the corresponding skin-adhesive layer 1. A cream-free gap with a width of 0.8 mm is maintained between the lubrication reservoir 4 and the adjacent liquid delivery point 3.

[0097] The moisture storage areas 4 on both sides of the absorbent layer 2 are staggered by half a cycle along the length of the paper towel, and the overlapping area of ​​the upper and lower moisture storage areas 4 projected onto the absorbent layer 2 is 10% of the area of ​​a single moisture storage area 4.

[0098] The width of the anti-migration edge 5 is 0.4 mm. The total amount of moisturizing cream applied to each side of the skin-adhesive layer 1 is 2.75 g / m². 2 The first cream accounts for 25%, and the second cream accounts for 75%.

[0099] Example 2:

[0100] The difference from Example 1 is that the total area of ​​the liquid guiding points 3 accounts for 9% of the area of ​​the corresponding skin layer 1.

[0101] Example 3:

[0102] The difference from Example 1 is that the total area of ​​the liquid guiding points 3 accounts for 14% of the area of ​​the corresponding skin layer 1.

[0103] Example 4:

[0104] The difference from Example 1 is that the total area of ​​the liquid guiding points 3 accounts for 18% of the area of ​​the corresponding skin layer 1.

[0105] Example 5:

[0106] The difference from Example 1 is that the second cream, by weight, comprises the following components: 22 parts glycerin, 8 parts sorbitol, 3 parts trehalose, 8 parts caprylic / capric triglyceride, 3 parts squalane, 3 parts polydimethylsiloxane, 4 parts hydrogenated vegetable oil, 4 parts glyceryl stearate, 3 parts cetearyl alcohol, 0.3 parts hydroxyethyl cellulose, 0.2 parts cellulose nanofibers, 0.6 parts phenoxyethanol, 0.2 parts ethylhexylglycerin, 0.1 parts citric acid, and 40.6 parts deionized water.

[0107] Comparative Example 1:

[0108] The difference from Example 1 is that no moisturizing area 4 is provided between the two skin-adhesive layers 1 and the liquid-absorbing layer 2, and neither the first cream nor the second cream is applied.

[0109] Comparative Example 2:

[0110] The difference from Example 1 is that the discrete moisturizing area 4 is not set, and the second cream is evenly applied to the entire inner surface of the two skin-adhesive layers 1, including the area where the liquid guiding point 3 is located.

[0111] Comparative Example 3:

[0112] Unlike Example 1, the two skin-adhesive layers 1 are not locally compressed, and no liquid-conducting points 3 are formed. The skin-adhesive layer 1 and the absorbent layer 2 transfer liquid only through natural contact with the paper layer.

[0113] Comparative Example 4:

[0114] The difference from Example 1 is that the lubrication storage area 4 is not offset from the liquid guiding point 3, part of the lubrication storage area 4 directly covers the liquid guiding point 3, and there is no cream-free gap between the lubrication storage area 4 and the liquid guiding point 3.

[0115] Comparative Example 5:

[0116] The difference from Example 1 is that no anti-migration edge 5 is set around the storage area 4, and the mass of the first cream originally used to form the anti-migration edge 5 is changed to the mass of the second cream of the same mass, so that the total amount of moisturizing cream added in Comparative Example 5 is the same as that in Example 1.

[0117] Comparative Example 6:

[0118] The difference from Example 1 is that the moisture storage areas 4 on both sides of the absorbent layer 2 completely overlap along the thickness direction of the paper towel, and the overlapping area of ​​the two moisture storage areas 4 projected onto the absorbent layer 2 is 100% of the area of ​​a single moisture storage area 4.

[0119] Comparative Example 7:

[0120] The difference from Example 1 is that the second cream does not contain a water-insoluble lubricating phase. The second cream comprises, by weight, 28 parts glycerin, 8 parts 1,3-propanediol, 3 parts trehalose, 1.5 parts hydroxyethyl cellulose, 0.3 parts cellulose nanofibers, 0.6 parts phenoxyethanol, 0.2 parts ethylhexylglycerin, 0.1 parts citric acid, and 58.3 parts deionized water.

[0121] Comparative Example 8:

[0122] The difference from Example 1 is that no wet strength agent is added to the absorbent layer 2. The absorbent layer 2 uses the same fiber ratio and the same wet strength level as the skin layer 1, so that the wet tensile strength of the absorbent layer 2 is not higher than that of the skin layer 1.

[0123] Comparative Example 9:

[0124] The difference from Example 1 is that the total area of ​​the liquid guiding points 3 accounts for 2% of the area of ​​the skin-adhesive layer 1.

[0125] Comparative Example 10:

[0126] The difference from Example 1 is that the total area of ​​the liquid guiding points 3 accounts for 25% of the area of ​​the skin-adhesive layer 1.

[0127] The tissue samples obtained in the above embodiments and comparative examples were pretreated and equilibrated for 24 hours at a temperature of 23±1℃ and a relative humidity of 50±2%. At least 10 intact tissues were taken from each sample group for each test. Independent samples were used for each test; tissues that had been liquid-soaked, compressed, or rubbed were not reused. The simulated nasal fluid, by mass percentage, consisted of: sodium chloride 0.90%, mucin 0.30%, bovine serum albumin 0.10%, and deionized water 98.70%. The pH of the simulated nasal fluid was adjusted to 6.5±0.2 using phosphate buffer. Before testing, the simulated nasal fluid was kept at a constant temperature of 32±1℃ to approximate the temperature of the liquid used when wiping the nose and face. Then, the following indicators were tested.

[0128] Liquid transport time was measured by cutting tissue paper into 100mm × 100mm samples and fixing them horizontally on the test stage, ensuring the samples were in a naturally flat state without applying pre-pressure. Using a pipette, 0.50mL of simulated nasal discharge was dropped onto the geometric center of the sample within 1 second, with the dropper 10mm from the sample surface. A top-mounted camera recorded the changes in liquid on the tissue paper surface. Timing was taken from the first contact of the simulated nasal discharge with the tissue paper surface until the visible free liquid film area on the tissue paper surface decreased to less than 10% of the maximum liquid film area; this time was recorded as the liquid transport time. Ten samples were tested in each group, and the arithmetic mean was taken. A shorter liquid transport time indicates that the liquid can quickly pass through the liquid guide point 3 and enter the absorbent layer 2.

[0129] The dynamic friction coefficients in both the dry and liquid-treated states were determined using a reciprocating friction testing machine. The friction object was silicone artificial skin with stable surface roughness. The contact area of ​​the friction slider was 50mm × 50mm, and a total load of 5N was applied, resulting in a contact pressure of approximately 2kPa. The friction stroke was 60mm, and the moving speed was 50mm / s. For the dry-state friction test, an untreated tissue was fixed to the bottom of the friction slider with the skin layer 1 facing the artificial skin. One reciprocating friction cycle was performed, and the average friction force during the stable sliding phase was recorded. The ratio of the average friction force to the normal load was used as the dry-state dynamic friction coefficient. For the liquid-treated friction test, another tissue from the same group was used, and 0.30mL of simulated nasal discharge was evenly added to the friction area. After standing for 10 seconds, 10 reciprocating friction cycles were performed. The average friction force during the stable sliding phase of the 10th reciprocating friction cycle was recorded, and the dynamic friction coefficient after the 10th liquid-treated cycle was calculated. Ten samples were tested in each group. The lower the coefficient of friction, the less the paper towel drags on the skin. The smaller the difference between the dry coefficient of friction and the coefficient of friction after the 10th liquid reaction, the better the paper towel's lubrication retention ability after being exposed to liquid.

[0130] The cream migration area ratio was determined by adding 0.005% (by weight of total cream) of an oil-soluble fluorescent tracer to the oil phases of the first and second creams used in this test. This addition was only used to observe the cream location and did not significantly change the cream viscosity or retention properties. Twenty tissues from the same group were neatly stacked, with non-fluorescent absorbent paper placed on the top and bottom surfaces of each tissue. A uniform pressure of 2 kPa was applied to the tissue stack, and it was stored for 7 days at a temperature of 45 ± 2 °C and a relative humidity of 75 ± 5%. After storage, the pressure was released, and the outer surface of the tissues and the absorbent paper were photographed under ultraviolet light. The following areas were statistically analyzed using image analysis software: areas where cream migrated to areas outside the original moisture storage area 4; areas where cream seeped from the inside of the tissue to the outer surface; and areas where cream transferred to adjacent tissues or absorbent paper. The percentage of the total area of ​​these non-predetermined cream areas to the total area of ​​the tissue sample was taken as the cream migration area ratio. A lower cream migration area ratio indicates better storage stability of the arrangement of the anti-migration edge 5 and the moisture storage area 4.

[0131] For localized compression hardness testing, a 100mm × 100mm tissue paper sample was placed flat on a horizontal, rigid testing platform. A 2mm diameter round-headed indenter was used to press vertically into the tissue paper at a speed of 1mm / min. The indentation at each test location was 20% of the initial thickness of the tissue paper at that location, and the compression force at which the specified indentation was reached was recorded. 100 locations were tested on each tissue paper in a 10 × 10 grid, covering the liquid guide point (3), the moisture reservoir (4), and the ordinary paper layer. The 100 compression force test values ​​were sorted from smallest to largest, and the 95th percentile was taken as the localized compression hardness of that tissue paper. Ten tissue papers were tested in each group, and the average value was taken. Using the 95th percentile value instead of a simple average more accurately reflects the impact of a small number of localized hard spots on the actual tactile feel. The lower the localized compression hardness, the better the softness and uniformity of the tissue paper surface.

[0132] The wet reciprocating wiping damage area ratio was determined by cutting a tissue sample into 100mm × 100mm pieces and uniformly adding 0.50mL of simulated nasal secretion to the center of the sample, allowing it to stand for 10 seconds. The sample was then fixed on a reciprocating friction testing machine, with the skin-adhesive layer 1 in contact with artificial skin. A contact pressure of 2kPa was applied, and 20 reciprocating wiping cycles were performed at a friction stroke of 60mm and a speed of 50mm / s. After testing, the tissue was naturally unfolded and placed on a transmitted light testing stage, and images of the tissue were captured using fixed exposure parameters. The following areas were identified using image analysis software: through-holes; obvious tears; and areas with severe fiber loss or thinning where the light transmittance was more than 1.8 times that of the intact paper layer. The percentage of the total area of ​​these areas relative to the effective test area of ​​the sample was taken as the wet reciprocating wiping damage area ratio. A lower damage area ratio indicates that the tissue is less prone to tearing, pilling, and shedding during repeated wet wiping.

[0133] Specific test data are shown in Table 1.

[0134] Table 1:

[0135]

[0136] Example 2, compared to Example 1, increased the area of ​​the liquid conduction points, resulting in more capillary conduction sites and thus a significant increase in liquid transfer speed. Simultaneously, its local compressive hardness only increased from 55 mN to 61 mN, remaining at a low level, indicating that the increased area of ​​the liquid conduction points did not lead to a significant hardening of the skin layer. Example 2 demonstrated better performance in terms of liquid transfer speed, post-liquid friction, storage stability, and wet integrity. Based on a comprehensive assessment of the five predictive indicators, Example 2 exhibited the most balanced overall performance among all groups.

[0137] With the further increase in the liquid-conducting point area in Example 3, the liquid transfer capability continued to improve, and the reservoir area, anti-migration edge, and three-phase cream system maintained low liquid-receiving friction and cream migration rate. However, the local compression hardness of Example 3 was higher than that of Examples 1 and 2, indicating that while the increased liquid-conducting point area is beneficial for liquid transfer, it also increases the compacted area in the skin-contact layer, resulting in a slight decrease in the softness of the tissue surface. Therefore, Example 3 is more suitable for emphasizing rapid liquid-conducting performance, but its overall effect is slightly lower than that of Example 2 in products requiring extremely soft touch.

[0138] Example 4 demonstrates that the liquid conduction and lubrication effects of this application can still be achieved when the liquid conduction point area reaches 18%, but it is close to the acceptable upper limit of softness and structural integrity. Example 5 illustrates that the continuous lubrication effect of this application does not depend on any specific cream ingredient, but mainly comes from the functional combination of the hydrophilic moisturizing phase, the water-insoluble lubricating phase, and the retaining phase.

[0139] Comparative Example 1 illustrates that the liquid transfer point can only improve liquid transfer and cannot replace the lubrication provided by the storage area and moisturizing cream. After the paper towel absorbs the liquid, the friction between the moistened fibers and the artificial skin increases significantly, easily creating a dragging sensation. The cream migration area rate of Comparative Example 1 is zero because the sample does not contain cream, and this cannot be used to conclude that its storage performance is superior to that of the Example.

[0140] Comparative Example 2 illustrates that after the entire surface of the paper towel is coated with cream to cover the absorbent points, the pores of the paper layer are affected by the cream, making it difficult for external liquids to quickly penetrate the absorbent layer. External liquids remain on the skin-contacting surface for an extended period, dissolving or carrying water-soluble moisturizing components inwards. This results in the paper towel initially feeling smooth, but its lubricating effect significantly diminishes after being coated with liquid. Furthermore, the full-width coating lacks a clear storage boundary for the cream, making it prone to spreading to the outer surface of the paper towel or adjacent paper layers under high temperatures and stacking conditions. Therefore, simply pursuing uniform cream coverage and low initial friction cannot solve the problem of sustained lubrication of the paper towel after being coated with liquid.

[0141] Comparative Example 3 illustrates that the natural contact between the ordinary skin-adhesive layer and the absorbent layer is insufficient to form a stable and rapid capillary liquid conduction path. Foreign liquid remains in the skin-adhesive layer for an extended period, resulting in a high liquid content, which increases wiping friction and wet-state damage. Therefore, although the liquid conduction points may create some localized compaction, they play a necessary role in the rapid downward transfer of liquid and reducing the liquid content of the skin-adhesive layer.

[0142] Comparative Example 4 illustrates that even when both a liquid guiding point and a lubrication reservoir are provided, if the lubrication reservoir directly covers the liquid guiding point, the cream will still obstruct the capillary pathways of the liquid guiding point. When foreign liquid enters the liquid guiding point, it will directly contact and wash away the cream, causing the cream to be carried into the liquid absorption layer, resulting in insufficient surface lubrication components after liquid reception.

[0143] Comparative Example 5 illustrates that the primary function of the anti-migration edge occurs during storage and transportation. Without the anti-migration edge, the second cream easily migrates to the periphery of the lubrication zone, the liquid conduction point, or adjacent paper layers. Although the sample may still have good lubricity when it is freshly made, after high-temperature and high-pressure storage, the effective cream in the lubrication zone decreases, and the liquid conduction point may also become contaminated, ultimately leading to a decline in lubrication performance after liquid absorption.

[0144] Comparative Example Six illustrates that when the upper and lower moisture storage zones are completely overlapped, the cream load in the thickness direction of the paper towel becomes concentrated, resulting in thicker local areas that bear a greater concentrated load when stacked and compressed. Therefore, the cream is more easily squeezed out, and perceptible hard spots are more likely to form on the paper surface.

[0145] Comparative Example 7 shows that creams containing only hydrophilic moisturizing ingredients such as glycerin, 1,3-propanediol, and trehalose can improve the initial feel when dry and maintain good storage stability by retaining the components. However, the hydrophilic moisturizing ingredients are easily dissolved and migrate to the absorbent layer after contact with simulated nasal liquid, and cannot maintain low friction during continuous wiping.

[0146] Comparative Example 8 illustrates that the wet tensile strength of the absorbent layer primarily affects the structural integrity of the paper towel after it absorbs liquid, while having a relatively small impact on liquid conduction speed, lubrication performance, and cream migration. When the absorbent layer does not contain a wet strength agent, the paper towel struggles to support the two skin-contact layers after absorbing liquid, making it prone to stretching, tearing, and severe fiber shedding during repeated wiping.

[0147] Comparative Example 9 illustrates that when the total area of ​​the liquid-conducting points accounts for only 2% of the area of ​​the skin-adhesive layer, there are insufficient capillary liquid-conducting positions, and external liquid cannot enter the absorbent layer in a timely manner. The skin-adhesive layer remains in a wet state for a longer period of time, resulting in increased liquid-receiving friction and wet-state damage.

[0148] Comparative Example 10 illustrates that a shorter liquid transfer time is not necessarily better. When the liquid transfer point area is too large, a large area in the skin layer is compressed, reducing the area of ​​loose fibers, which leads to paper hardening and increased initial friction. Furthermore, the large amount of compressed and uncompressed areas can easily create deformation differences, causing stress concentration and paper layer damage during wet wiping.

[0149] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A composite moisturizing tissue paper, comprising two skin-adhering layers (1) and an absorbent layer (2) disposed between the two skin-adhering layers (1), characterized in that: Both skin-adhesive layers (1) are formed with multiple spaced liquid guiding points (3), and each liquid guiding point (3) forms a capillary liquid guiding connection with the liquid-absorbing layer (2). Both skin-adhesive layers (1) and the liquid-absorbing layer (2) are provided with multiple moisturizing cream storage areas (4). The moisturizing areas (4) are staggered from the adjacent liquid guiding points (3), and the amount of moisturizing cream added at the liquid guiding point (3) is lower than the amount of moisturizing cream added in the moisturizing area (4).

2. The composite moisturizing tissue paper according to claim 1, characterized in that: The liquid guiding point (3) is a compacted area formed on the corresponding skin layer (1). The paper density of the liquid guiding point (3) is higher than the paper density of the area between adjacent liquid guiding points (3) in the corresponding skin layer (1). The side of the liquid guiding point (3) facing the liquid absorption layer (2) is in contact with the liquid absorption layer (2).

3. The composite moisturizing tissue paper according to claim 1, characterized in that: The total area of ​​the liquid guiding points (3) accounts for 4%-18% of the area of ​​the skin-adhesive layer (1).

4. The composite moisturizing tissue paper according to claim 1, characterized in that: The moisture storage areas (4) on both sides of the liquid absorption layer (2) are arranged in a staggered manner.

5. The composite moisturizing tissue paper according to claim 1, characterized in that: The reservoir (4) is surrounded by a migration prevention edge (5), and the mass percentage of the retention component contained in the migration prevention edge is higher than the mass percentage of the retention component contained in the corresponding reservoir (4).

6. The composite moisturizing tissue paper according to claim 1, characterized in that: The moisturizing cream comprises a hydrophilic moisturizing phase, a water-insoluble lubricating phase, and a retaining phase; The hydrophilic moisturizing phase includes at least one of glycerin, 1,3-propanediol, sorbitol and trehalose; The water-insoluble lubricating phase includes at least one of vegetable oil, hydrogenated vegetable oil, emollient ester, squalane, and polydimethylsiloxane; The holding phase includes at least one of fatty acid glycerides, fatty alcohols, cellulose nanofibers, and polymeric thickeners.

7. A composite moisturizing tissue according to claim 2, characterized in that: The wet tensile strength of the absorbent layer (2) is higher than that of the skin-adhesive layer (1).

8. A method for preparing a moisturizing tissue, comprising manufacturing a composite moisturizing tissue according to any one of claims 1-7, characterized in that: Specifically, the steps include the following: S1. Multiple spaced liquid guiding points (3) are formed on the two skin-adhesive layers (1). S2. Multiple moisturizing cream storage areas (4) are formed on the inner surface of the two skin-adhering layers (1), so that each moisturizing area (4) is staggered from the adjacent liquid guiding point (3), and the amount of moisturizing cream added at the liquid guiding point (3) is lower than the amount of moisturizing cream added in the moisturizing area (4). S3. Align and combine the two skin-adhering layers (1) and the liquid-absorbing layer (2) in sequence, so that the liquid-conducting point (3) and the liquid-absorbing layer (2) form a capillary liquid-conducting connection; S4. Shaping treatment.

9. The method for preparing a moisturizing tissue according to claim 8, characterized in that: When forming the lubrication storage area (4), S2 ensures that a cream-free gap is maintained between the lubrication storage area (4) and the adjacent liquid guiding point (3).

10. A method for preparing a moisturizing tissue according to claim 8, characterized in that: In the S2, a graded coating method is used to form a moisture storage area (4). First, a first cream is coated on the periphery of each moisture storage area (4) to form an anti-migration edge (5). Then, a second cream is coated in the area enclosed by the anti-migration edge (5) to form a moisture storage area (4). The mass ratio of the retaining component in the first cream is higher than the mass ratio of the retaining component in the second cream.

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