A skin care paper diaper containing a single-layer coated resin

Abstract

The application relates to the technical field of paper diapers, and provides a skin-care paper diaper containing single-layer coated resin, which aims to solve the problem of poor antibacterial and bacteriostatic effects of paper diapers in the prior art, and comprises a paper diaper main body, wherein the paper diaper main body is sequentially provided with a surface layer, a non-woven fabric flow guide layer, an absorption core layer and a bottom film layer from inside to outside; the absorption core layer contains single-layer coated resin; and the single-layer coated resin contains a bacteriostatic agent. In the paper diaper, the single-layer coated resin containing the bacteriostatic agent is used in the absorption core layer; the water-absorbing resin adsorbed with the bacteriostatic agent is coated with water-soluble substances in the single-layer coated resin; when the absorption core layer meets water, the film layer slowly dissolves, the bacteriostatic agent is released, and the bacteriostatic effect of the absorption core layer is improved.

Description

Technical Field

[0001] This invention relates to the field of diaper technology, and more particularly to a skin-care diaper containing a single-layer coating resin. Background Technology

[0002] Infants and young children cannot control urination because their urethral and anal sphincter muscles are not yet fully developed. Disposable diapers are used to absorb urine from infants and young children and are one of their most frequently used daily necessities. However, existing disposable diapers become less breathable after absorbing water, becoming damp and stuffy, which can lead to bacterial growth and put a significant burden on infants' skin. Because infants' skin is delicate, absorbency and comfort are the core competitive advantages of baby diapers.

[0003] For example, invention publication number CN106038077A discloses "a baby diaper," including an outer cover, absorbent core, leak-proof barriers, leg elastics, and a back waist elastic component. The permeable inner layer consists of one hydrophilic area and two non-hydrophilic areas. The hydrophilic area is coated with a hydrophilic oil, while the two non-hydrophilic areas are not coated with a hydrophilic oil. The front waist area of ​​the outer cover has a barrier strip to prevent the leakage of particulate absorbent resin. The barrier strip is made of the same material as the elastic cover. This diaper has poor antibacterial properties, and its breathability decreases after absorbing urine, creating a warm and humid environment for the baby's skin, which easily leads to bacterial growth and rashes. Summary of the Invention

[0004] In order to overcome the problem of poor antibacterial and bacteriostatic effects of existing diapers, this invention provides a skin-care diaper containing a single-layer coating resin. This diaper has a good antibacterial effect, can protect the baby's skin, and provides a high level of comfort.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A skin care diaper containing a single-layer coating resin includes a diaper body, wherein the diaper body is provided with a surface layer, a non-woven fabric diversion layer, an absorbent core layer and a bottom film layer from the inside out, the absorbent core layer contains a single-layer coating resin and the single-layer coating resin contains an antibacterial agent.

[0007] This invention uses a single-layer coated resin containing an antibacterial agent in the absorbent core layer. The single-layer coated resin uses a water-soluble substance to coat the absorbent resin that adsorbs the antibacterial agent. When the absorbent core layer comes into contact with water, the membrane slowly dissolves, releasing the antibacterial agent and improving the antibacterial effect of the absorbent core layer. At the same time, the expansion of the absorbent resin after absorbing water will also accelerate the destruction of the membrane.

[0008] Preferably, the single-layer coating resin is prepared by the following steps:

[0009] S1. Immerse the absorbent resin in the antibacterial agent and filter;

[0010] S2. Mix the mixed solution of sodium alginate and pullulan polysaccharide with ferulic acid solution to obtain a mixed solution;

[0011] S3. Apply the mixture to the surface of the absorbent resin obtained in S1, and dry the absorbent resin. The amount of mixture used is 50-100% of the volume of the mixture obtained in S2.

[0012] S4. Mix the remaining mixture with starch solution and glycerin, heat to 50-60℃, and then coat it onto the surface of the absorbent resin obtained in S3. Then dry the absorbent resin to obtain a single-layer coated resin.

[0013] The coating of the single-layer coated resin is a sodium alginate-pullulan membrane, with starch filling its pores. This membrane isolates the absorbent resin from external air before contact with water, preventing the oxidation of the antibacterial agent. Pullulan itself also has certain antibacterial and antioxidant effects. In this membrane, sodium alginate and pullulan cross-link to form a film under the action of ferulic acid. The starch filling itself can also form a film, blocking the pores of the sodium alginate-pullulan membrane and improving its barrier properties. At the same time, the starch dissolves faster than the cross-linked sodium alginate and pullulan in this membrane, allowing the resin to quickly release the antibacterial agent and absorb water upon contact with water. The swelling of the absorbent resin after absorbing water, along with the water-soluble properties of sodium alginate and pullulan, further damages the membrane.

[0014] Preferably, the mixture in S2 contains 1-5% sodium alginate, 1-3% pullulan, and 0.05-0.1% ferulic acid.

[0015] Preferably, the ferulic acid solution in S2 is obtained by dissolving ferulic acid in water with a mass fraction of 0.5-2% acetic acid.

[0016] Preferably, the starch solution in S4 is an aqueous solution containing 3-6% by mass of water-soluble starch.

[0017] Preferably, the water-soluble starch is obtained by mixing amylose and hydroxypropyl starch ether at a mass ratio of 100:(5-20).

[0018] Amylose has better water solubility than amylopectin, while hydroxypropyl starch ether is a starch derivative that is more soluble in water, allowing the antibacterial agent to be released quickly and bringing the internal absorbent resin into contact with the urine to be absorbed.

[0019] Preferably, the mass ratio of the absorbent resin, the mixture, the starch solution, and the glycerin is 100:(10-50):(5-20):(0.05-1).

[0020] Preferably, the drying temperature in step S3 is 50-70℃ and the drying time is 0.5-1h, and the drying temperature in step S4 is 50-70℃ and the drying time is 0.5-2h.

[0021] Preferably, the antibacterial agent is a mixture of bisabolol, cedar oil and camellia oil.

[0022] Preferably, the mass ratio of bisabolol, cedar oil and camellia oil is (1-2):(5-10):(5-10).

[0023] Bisabolol, cedarwood oil, and camellia oil have antibacterial properties and will not irritate infant skin; at the same time, bisabolol has a good synergistic antibacterial effect with terpinene-4-ol in cedarwood oil and camellia oil. The antibacterial agent is an oily substance and does not affect the water absorption of the superabsorbent resin.

[0024] Therefore, the present invention has the following beneficial effects: (1) the single-layer coated resin can release antibacterial agents after contact with urine, inhibiting bacterial reproduction and thus protecting the baby's skin; (2) the antibacterial agents in the single-layer coated resin do not come into contact with air before use, and are not easily oxidized, which can improve the storage time of the diaper; (3) the single-layer coated resin has good water absorption, and the coating does not affect the water absorption of the absorbent resin. Detailed Implementation

[0025] The present invention will be further described below with reference to specific implementation methods.

[0026] Example 1

[0027] A single-layer coated resin is prepared by the following steps:

[0028] S1. Immerse 100 parts by weight of superabsorbent polymer (SAP) in antibacterial agent, stir and mix for 1 hour, then filter and remove. The antibacterial agent is obtained by mixing bisabolol, cedar oil and camellia oil in a mass ratio of 2:5:8.

[0029] S2. A mixed solution containing 5 wt% sodium alginate and 3 wt% pullulan was mixed with a 0.08 wt% ferulic acid solution (containing 1 wt% acetic acid) to obtain a mixed solution.

[0030] S3. Take 25 parts by weight of the mixture and coat it on the surface of the absorbent resin obtained in S1. Dry the absorbent resin at 60°C for 1 hour.

[0031] S4. Mix 25 parts by weight of the mixture with 10 parts by weight of starch solution (containing 5 wt% amyl starch and 0.5 wt% hydroxypropyl starch ether) and 0.5 parts by weight of glycerol, heat to 50°C, and then coat the mixture onto the surface of the absorbent resin obtained in S3. Then dry the absorbent resin at 60°C for 2 hours to obtain a single-layer coated resin.

[0032] Example 2

[0033] A single-layer coated resin is prepared by the following steps:

[0034] S1. Immerse 100 parts by weight of superabsorbent polymer (SAP) in antibacterial agent, stir and mix for 1 hour, then filter and remove. The antibacterial agent is obtained by mixing bisabolol, cedar oil and camellia oil in a mass ratio of 1:5:5.

[0035] S2. A mixed solution containing 5 wt% sodium alginate and 3 wt% pullulan was mixed with a 0.08 wt% ferulic acid solution (containing 1 wt% acetic acid) to obtain a mixed solution.

[0036] S3. Take 10 parts by weight of the mixture and coat it on the surface of the absorbent resin obtained in S1. Dry the absorbent resin at 60°C for 0.5 h.

[0037] S4. Mix 10 parts by weight of the mixture with 5 parts by weight of starch solution (containing 5 wt% amyl starch and 0.5 wt% hydroxypropyl starch ether) and 0.2 parts by weight of glycerol, heat to 50°C, and then coat the mixture onto the surface of the absorbent resin obtained in S3. Then dry the absorbent resin at 60°C for 1 hour to obtain a single-layer coated resin.

[0038] Example 3

[0039] A single-layer coated resin, which differs from Example 1 in that the amount of the mixture used in S3 is 100% of the amount of the mixture obtained in S2.

[0040] Example 4

[0041] A single-layer coated resin differs from Example 1 in that S2 is obtained by mixing a mixed solution containing 1 wt% sodium alginate and 3 wt% pullulan with a 0.05 wt% ferulic acid solution (containing 1 wt% acetic acid).

[0042] Comparative Example 1

[0043] A single-layer coated resin is prepared by the following steps:

[0044] S1. Immerse 100 parts by weight of superabsorbent polymer (SAP) in antibacterial agent, stir and mix for 1 hour, then filter and remove. The antibacterial agent is obtained by mixing bisabolol, cedar oil and camellia oil in a mass ratio of 2:5:8.

[0045] S2. A mixed solution containing 5 wt% sodium alginate and 3 wt% pullulan was mixed with a 0.08 wt% ferulic acid solution (containing 1 wt% acetic acid) to obtain a mixed solution.

[0046] S3. Take 60 parts by mass of the mixture and coat it on the surface of the absorbent resin obtained in S1. Dry the absorbent resin at 60°C for 3 hours to obtain a single-layer coated resin.

[0047] Comparative Example 2

[0048] A single-layer coated resin is prepared by the following steps:

[0049] S1. Immerse 100 parts by weight of superabsorbent polymer (SAP) in antibacterial agent, stir and mix for 1 hour, then filter and remove. The antibacterial agent is obtained by mixing bisabolol, cedar oil and camellia oil in a mass ratio of 2:5:8.

[0050] S2. A mixed solution containing 5 wt% sodium alginate and 3 wt% pullulan was mixed with a 0.08 wt% ferulic acid solution (containing 1 wt% acetic acid) to obtain a mixed solution.

[0051] S3. Take 50 parts by weight of the mixture, 10 parts by weight of starch solution (containing 5 wt% amyl starch and 0.5 wt% hydroxypropyl starch ether), and 0.5 parts by weight of glycerol, mix them, heat to 50°C, and then coat them on the surface of the water-absorbing resin obtained in S1. Dry the water-absorbing resin at 60°C for 3 hours to obtain a single-layer coated resin.

[0052] Comparative Example 3

[0053] A single-layer coated resin differs from Example 1 in that the antibacterial agent is a mixture of cedar oil and camellia oil in a mass ratio of 5:8.

[0054] Comparative Example 4

[0055] A single-layer coated resin, which differs from Example 1 in that the starch solution in S3 is an aqueous solution containing 5.5 wt% amylose.

[0056] Comparative Example 5

[0057] A single-layer coated resin differs from Example 1 in that S1 is a mixture obtained by mixing an 8 wt% sodium alginate solution with a 0.08 wt% ferulic acid solution (containing 1 wt% acetic acid).

[0058] The antibacterial effect of the monolayer coated resin obtained in the above examples and comparative examples, and the untreated superabsorbent polymer (SAP) was tested as follows: 0.1g of the resin to be tested was added to 50mL of a solution containing 3*10... 3 The antibacterial rate was calculated after incubation at 37°C for 24 hours in a culture medium containing cfu / mL of the test bacteria. Absorbent core layers were prepared using the single-layer coating resin obtained in the above examples and comparative examples, as well as untreated superabsorbent polymer (SAP). Diapers with a structure consisting of a top layer, a non-woven fabric distribution layer, an absorbent core layer, and a bottom film layer were then prepared using these absorbent core layers. Their performance was tested according to GB / T 28004.1-2021 Part 1: Baby Diapers, and the results are shown in the table below.

[0059]

[0060]

[0061] As can be seen from the table above, the single-layer coating of the present invention does not affect the water absorption effect of the absorbent resin and has a good antibacterial effect.

[0062] Comparing Example 1 and Comparative Example 1, it can be seen that when the coating does not contain starch, its solubility in water is poor, resulting in a decrease in water absorption rate. The water absorption of Comparative Example 2 is lower than that of Example 1 because its drying effect during one-time coating is poor. The antibacterial effects of the antibacterial agents coated in Comparative Examples 3 and 4 are worse than those in Example 1, indicating that bisabolol works better when used in combination with cedar oil and camellia oil. Comparative Example 5 did not add pullulan, resulting in a decrease in the antibacterial effect of the resin.

Claims

1. A method for preparing a single-layer coating resin for skin-care diapers, comprising a diaper body, characterized in that, The diaper body is provided with a surface layer, a non-woven fabric diversion layer, an absorbent core layer and a bottom film layer from the inside out. The absorbent core layer contains a single-layer coating resin, and the single-layer coating resin contains an antibacterial agent. The single-layer coated resin is prepared by the following steps: S1. Immerse the absorbent resin in the antibacterial agent and filter; S2. Mix the mixed solution of sodium alginate and pullulan polysaccharide with ferulic acid solution to obtain a mixed solution; S3. Apply the mixture to the surface of the absorbent resin obtained in S1, and dry the absorbent resin. The amount of mixture used is 50-100% of the volume of the mixture obtained in S2. S4. Mix the remaining mixture with starch solution and glycerin, heat to 50-60℃, and then coat it onto the surface of the absorbent resin obtained in S3. Then dry the absorbent resin to obtain a single-layer coated resin.

2. The method for preparing a single-layer coating resin for skin-care diapers according to claim 1, characterized in that, The mixture of S2 contains 1-5% sodium alginate, 1-3% pullulan, and 0.05-0.1% ferulic acid.

3. A method for preparing a single-layer coating resin for skin-care diapers according to claim 1 or 2, characterized in that, The ferulic acid solution in S2 is obtained by dissolving ferulic acid in water with a mass fraction of 0.5-2% acetic acid.

4. The method for preparing a single-layer coating resin for skin-care diapers according to claim 1, characterized in that, The starch solution in S4 is an aqueous solution containing 3-6% by mass of water-soluble starch.

5. The method for preparing a single-layer coating resin for skin-care diapers according to claim 4, characterized in that, The water-soluble starch is obtained by mixing amylose and hydroxypropyl starch ether at a mass ratio of 100:(5-20).

6. The method for preparing a single-layer coating resin for skin-care diapers according to claim 1, characterized in that, The mass ratio of the absorbent resin, the mixture, the starch solution, and the glycerin is 100:(10-50):(5-20):(0.05-1).

7. The method for preparing a single-layer coating resin for skin-care diapers according to claim 1, characterized in that, The drying temperature in step S3 is 50-70℃ and the drying time is 0.5-1h. The drying temperature in step S4 is 50-70℃ and the drying time is 0.5-2h.

8. The method for preparing a single-layer coating resin for skin-care diapers according to claim 1, characterized in that, The antibacterial agent is a mixture of bisabolol, cedar oil and camellia oil.

9. A method for preparing a single-layer coating resin for skin-care diapers according to claim 8, characterized in that, The mass ratio of bisabolol, cedar oil and camellia oil is (1-2):(5-10):(5-10).

10. The application of a single-layer coated resin according to any one of claims 1-9, characterized in that, The single-layer coating resin is used in skin-care diapers.

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