Surface material for paper diaper and method for producing the same

Abstract

The application relates to a surface layer material for a paper diaper and a preparation method thereof. The surface layer material is prepared by mixing antibacterial elastic fiber yarns and antibacterial soft fiber yarns in a weight ratio of 1:1.3-1.8, the antibacterial elastic fiber yarns are prepared from the following raw materials in parts by weight: 20-30 parts of polyamide resin, 1-10 parts of POE, and 10-18 parts of antibacterial filler, the antibacterial filler is obtained by mixing an antibacterial filler and fiber powder in a weight ratio of (2.8-4.6):1. The antibacterial soft fiber yarns are prepared from the following raw materials in parts by weight: 18-25 parts of PLA, 5-12 parts of PBS, 2-5 parts of environment-friendly plasticizer, and 14-22 parts of antibacterial filler, the antibacterial filler is obtained by mixing an antibacterial filler and fiber powder in a weight ratio of 1:(2.5-3.5). The surface layer material obtained by the application has good softness and antibacterial property, and the possibility of red spot of infants and young children in the use of diapers is reduced.

Description

Technical Field

[0001] This application relates to the field of diapers, and more specifically, to a surface material for diapers and a method for preparing the same. Background Technology

[0002] Disposable diapers are a common daily necessity for babies, encompassing various types such as diaper pads, pull-ups, and disposable diapers. Dry disposable diapers allow babies to sleep soundly through the night, and due to their high absorbency, they are commonly known as "disposable diapers."

[0003] Disposable diapers generally consist of three main parts, from top to bottom: the outer cover layer, the absorbent core layer, and the bottom layer. The absorbent core layer traps and quickly absorbs urine, disperses urine, or diffuses it throughout the core layer via capillary action, ultimately absorbing and storing urine. The bottom layer is formed with a leak-proof PE film.

[0004] The outer layer is usually made of non-woven fabric, which is breathable and can improve the breathability inside the diaper. Water vapor can circulate to the outside of the diaper, timely expelling moisture and heat, effectively reducing the chance of eczema, and is soft, comfortable and basically does not irritate the skin.

[0005] However, with the advancement of science and technology, people have increasingly higher requirements for quality, especially for daily necessities for infants and young children, which often become the focus of many parents' attention. When infants and young children use disposable diapers, their skin comes into contact with the surface layer of the diaper. However, the surface layer of existing disposable diapers can still cause rashes on the infants' skin after use.

[0006] There are two main reasons for the appearance of this erythema. First, the antibacterial effect of the diaper surface layer is not good when it is used. Bacteria can easily grow after prolonged use, leading to erythema on the infant's skin. Second, the surface layer of the diaper can easily scratch the infant's skin after contact, thus causing erythema. Therefore, further research is needed on the surface fabric of the diaper. Summary of the Invention

[0007] In order to reduce the possibility of skin erythema in infants and young children after using diapers, this application provides a surface material for diapers and a method for preparing the same.

[0008] In a first aspect, this application provides a surface material for diapers, which is prepared by mixing antibacterial elastic fiber filaments and antibacterial soft fiber filaments in a weight ratio of 1:1.3-1.8;

[0009] The antibacterial elastic fiber filament is made from the following raw materials in parts by weight: 20-30 parts polyamide resin, 1-10 parts POE, 0.5-3 parts compatibilizer, and 10-18 parts antibacterial filler. The antibacterial filler is obtained by mixing antibacterial filler and fiber powder in a weight ratio of (2.8-4.6):1.

[0010] The antibacterial soft fiber is made from the following raw materials in parts by weight: 18-25 parts PLA, 5-12 parts PBS, 2-5 parts environmentally friendly plasticizer, and 14-22 parts antibacterial filler; the antibacterial filler is obtained by mixing antibacterial filler and fiber powder in a weight ratio of 1:(2.5-3.5).

[0011] The surface material of this application has good softness and antibacterial properties. When used in diapers for infants and young children, the surface of the diaper is relatively soft, less likely to scratch the skin of infants and young children, and has an antibacterial effect, reducing the possibility of erythema on the skin of infants and young children after use.

[0012] Specifically, the surface material is made from antibacterial elastic fibers and antibacterial soft fibers in a weight ratio of 1:1.3-1.8. Since both antibacterial elastic fibers and antibacterial soft fibers possess excellent antibacterial properties and elasticity, and antibacterial soft fibers possess good flexibility and antibacterial properties, the resulting surface material combines these properties, giving it both good flexibility and antibacterial properties. When used in infant diapers, the surface layer of the diaper is softer, better conforming to the infant's skin and reducing the likelihood of rashes. It also provides antibacterial protection, further reducing the possibility of rashes on the infant's skin after use.

[0013] Furthermore, polyamide resin possesses flexibility, a low coefficient of friction, and self-lubricating properties, thus the resulting antibacterial elastic fiber filaments also exhibit a low coefficient of friction, making the resulting surface material less likely to scratch the skin of infants and young children. POE, short for polyolefin elastomer, is a compound of octene and polyolefin resin, possessing good elasticity and toughness. When compounded with polyamide resin, antibacterial fillers, and compatibilizers, it yields antibacterial elastic fiber filaments with a low coefficient of friction, good flexibility, and good antibacterial properties.

[0014] PLA stands for polylactide, a polyester polymer obtained by polymerization of lactic acid as the main raw material. It has advantages such as antibacterial properties and ductility. PBS is short for polybutylene succinate, which has good heat resistance and mechanical properties. When PBS is compounded with PLA, its properties are combined, and antibacterial fillers are added, so that the antibacterial soft fiber filaments have both good flexibility and antibacterial properties.

[0015] The antibacterial filler is made by combining antibacterial filler and fiber powder in a certain ratio. Since the antibacterial filler has good antibacterial and filling effects, and the fiber powder has the effect of increasing flexibility, the antibacterial filler obtained by combining antibacterial filler and fiber powder has good filling, toughening and antibacterial effects. As a result, the antibacterial elastic fiber filaments and antibacterial soft fiber filaments also have good antibacterial properties.

[0016] In addition, the proportions of antibacterial filler and fiber powder in the raw materials of the antibacterial elastic fiber filament and antibacterial soft fiber filament of this application are different, so that the antibacterial elastic fiber filament and antibacterial soft fiber filament achieve better flexibility and antibacterial properties. Therefore, the surface material obtained after needle punching also has good flexibility and antibacterial properties, so that the diapers made from it have the advantages of good softness, skin-friendliness and good antibacterial properties, reducing the possibility of skin erythema after infants use diapers.

[0017] The antibacterial elastic fiber filament and antibacterial soft fiber filament of this application have a diameter of 10-50D and a length of 1-10mm.

[0018] Preferably, the antibacterial filler is composed of one or more of the following: distillers' grains powder, collagen powder, chitosan, and orange peel powder.

[0019] The aforementioned distiller's grains powder is the residue left over after fermenting agricultural by-products such as sorghum, corn, wheat, and rice into baijiu (Chinese liquor). Distiller's grains powder contains a large amount of protein and a small amount of alcohol, thus possessing antibacterial, skin-friendly, and filling / toughening properties. Collagen powder contains a large amount of protein and possesses skin-friendly, antibacterial, and filling / toughening properties.

[0020] Orange peel powder is rich in vitamins and has antibacterial, anti-inflammatory, and filling properties; chitosan has good antibacterial and filling effects. When using distillers' grains powder, collagen powder, chitosan, and orange peel powder as antibacterial fillers, the antibacterial, soft, and skin-friendly properties of the surface material can be further improved. When used by infants and young children, this reduces the possibility of bacterial growth or skin abrasion leading to erythema.

[0021] Preferably, the antibacterial filler is composed of at least three of the following: distillers' grains powder, collagen powder, chitosan, and orange peel powder.

[0022] When an antibacterial filler composed of at least three of the following—distillers' grains powder, collagen powder, chitosan, and orange peel powder—is used, its antibacterial and toughening effects are better.

[0023] When distillers' grains powder, collagen powder, and chitosan are compounded, their weight ratio is (1.3-1.8):(2.2-2.8):1.

[0024] When fermented grain powder, collagen powder, and orange peel powder are compounded, their weight ratio is (0.8-1.5):1:(1.5-2.5).

[0025] When the fermented grain powder, collagen powder, chitosan, and orange peel powder are combined, the weight ratio is (2-3):(0.5-1):(1-2):1.

[0026] When the above three or more antibacterial fillers are compounded in a certain weight ratio, they can achieve a good synergistic effect, thereby enabling the high surface layer material to obtain better antibacterial properties, softness and skin-friendliness.

[0027] Preferably, the fiber powder is composed of one or more of the following: needle leaf powder, banana fiber powder, lemon fiber powder, and corn fiber powder.

[0028] Needle leaf powder is obtained by drying and grinding the needle-shaped needles of the pine tree. It has a toughening effect and contains a small amount of pine oil, which has lubricating and antibacterial properties. Banana fiber powder is obtained by cutting and grinding banana fibers. It has the advantages of good toughness and softness. Lemon fiber powder is rich in vitamins and can play a role in antibacterial and toughening. Corn fiber powder is obtained by crushing and grinding corn fibers. Corn fiber powder is light and smooth, strong, moisture-absorbing and breathable, and has good drape.

[0029] This application utilizes fiber powder composed of one or more of the following: needle leaf powder, banana fiber powder, lemon fiber powder, and corn fiber powder. This enhances the antibacterial properties and skin-friendly softness of the surface material, reducing the occurrence of skin erythema during use.

[0030] Preferably, the fiber powder is composed of at least three of the following: needle leaf powder, banana fiber powder, lemon fiber powder, and corn fiber powder.

[0031] Among the four types of fiber powders mentioned above, needle leaf powder and lemon fiber powder, when used alone or in combination, can play a toughening role, but the resulting surface fabric feels a bit stiff. Banana fiber powder and corn fiber powder, when used alone or in combination, can also play a certain toughening role, but the resulting surface fabric is more prone to deformation.

[0032] Therefore, by compounding at least three of the following: needle leaf powder, banana fiber powder, lemon fiber powder, and corn fiber powder, the surface fabric can have better feel, softness, and skin-friendliness. When infants use diapers containing this surface fabric, they are less likely to experience skin abrasions and rashes.

[0033] When needle leaf powder, banana fiber powder, lemon fiber powder, and corn fiber powder are compounded, their weight ratio is 1:(1.5-2.5):(0.3-0.8):(1.2-1.5).

[0034] When needle leaf powder, banana fiber powder, and lemon fiber powder are compounded, their weight ratio is 1:(2-3):(0.1-0.5).

[0035] When needle leaf powder, banana fiber powder, and corn fiber powder are compounded, their weight ratio is 1:(1.8-2.3):(2-3).

[0036] When the above three or more antibacterial fillers are compounded in a certain weight ratio, the resulting surface fabric can achieve better softness and skin-friendliness, reducing the likelihood of skin irritation and redness when infants use diapers containing this surface fabric.

[0037] Preferably, the antibacterial filler is an antibacterial filler treated with a surface treatment agent, which is composed of the following raw materials in parts by weight:

[0038] 3-8 parts of γ-piperazinylpropylmethyldimethoxysilane

[0039] 1-3 parts of sodium carboxymethyl cellulose

[0040] Polyvinylpyrrolidone 1.5-3.5 parts

[0041] 1-3 parts of pregelatinized starch

[0042] 35-50 parts water.

[0043] To further improve the compatibility of antibacterial filler and fiber powder with polymer, this application uses a surface treatment agent to treat the antibacterial filler and fiber powder to ensure thorough and uniform mixing with the polymer, thereby resulting in a surface fabric with better softness, antibacterial properties, and skin-friendliness.

[0044] Among them, sodium carboxymethyl cellulose is easily soluble in water, forming a viscous thickener with good adhesion, while polyvinylpyrrolidone and pregelatinized starch both have good film-forming properties, adhesion, and good compatibility with polymers; γ-piperazinylpropylmethyldimethoxysilane is a difunctional diamine silane coupling agent that has good adhesion to antibacterial fillers and good compatibility with polymers.

[0045] Therefore, by blending and modifying sodium carboxymethyl cellulose, polyvinylpyrrolidone, pregelatinized starch, and γ-piperazinylpropylmethyldimethoxysilane, the resulting surface treatment agent is applied to the surface of the antibacterial filler. This surface treatment agent adheres stably to the surface of the antibacterial filler and forms a coating film, making it easily compatible with the polymer. Consequently, the resulting surface material acquires better antibacterial properties and softness. When infants use diapers containing this surface material, the possibility of erythema is reduced.

[0046] Preferably, the surface treatment agent is obtained by the following method:

[0047] Weigh out γ-piperazinylpropylmethyldimethoxysilane, sodium carboxymethyl cellulose, pregelatinized starch, polyvinylpyrrolidone and water according to the weight, mix them evenly, heat to 75-85℃, stir for 30-60 minutes to obtain the surface treatment agent.

[0048] The above process is simple to operate and has high production efficiency. Furthermore, the surface treatment agent obtained can be used to treat antibacterial fillers, thereby improving the antibacterial properties and softness of the resulting surface material.

[0049] Preferably, the antibacterial filler is prepared by the following steps:

[0050] Weigh 20-40 parts of antibacterial filler by weight, add it to 15-30 parts of surface treatment agent, heat to 40-55℃, stir for 20-50 minutes, filter, dry, grind, and sieve through 300-500 mesh to obtain antibacterial filler.

[0051] By using a surface treatment agent to treat the antibacterial filler, the antibacterial filler is fully compatible with the polymer, resulting in a softer feel and better antibacterial properties in the surface material.

[0052] The environmentally friendly plasticizer is epoxidized soybean oil; the compatibilizer is PTW compatibilizer.

[0053] Epoxidized soybean oil has a good plasticizing effect, which improves the processing fluidity of the antibacterial soft fiber filament raw material system and improves processing efficiency. PTW compatibilizer not only plays a toughening role, but also improves the compatibility between polyamide resin and POE, thereby making the antibacterial elastic fiber filament raw material system fully and evenly mixed, thus obtaining better mechanical properties.

[0054] Secondly, this application provides a method for preparing a surface material for diapers, comprising the following steps:

[0055] Antibacterial elastic fiber: Weigh 20-30 parts of polyamide resin, 1-10 parts of POE and 10-18 parts of antibacterial filler by weight, mix evenly, heat to 105-115℃, stir for 40-60 minutes, extrude, measure, and spin to obtain antibacterial elastic fiber.

[0056] Antibacterial soft fiber filament: By weight, PLA 18-25 parts, PBS 5-12 parts, environmentally friendly plasticizer 2-5 parts, antibacterial filler 14-22 parts are mixed evenly, heated to 105-115℃, stirred for 40-60 minutes, extruded, metered, and spun to obtain antibacterial soft fiber filament.

[0057] Surface material production: Antibacterial elastic fiber filaments and antibacterial soft fiber filaments are mixed evenly in a weight ratio of 1:1.3-1.8, and then needle-punched to obtain the surface material.

[0058] The above solution yields a surface material that is soft, skin-friendly, has a good feel, and is highly antibacterial.

[0059] The production process of this application requires the use of needle punching equipment to needle punch antibacterial elastic fiber filaments and antibacterial soft fiber filaments. If the tensile strength and flexibility of the antibacterial elastic fiber filaments and antibacterial soft fiber filaments are not good, it will cause breakage during needle punching, affecting the needle punching effect and resulting in a stiffer feel to the surface fabric formed by needle punching.

[0060] Therefore, when polyamide resin, POE, 0.5-3 parts compatibilizer, and antibacterial filler are used in a composite, although good elasticity, flexibility, low coefficient of friction, and antibacterial properties are obtained, the amount of antibacterial filler in the antibacterial filler is greater than that of fiber powder. The current comprehensive performance results in a surface material with better softness and antibacterial properties. Similarly, when PLA, PBS, environmentally friendly plasticizer, and antibacterial filler are used in a composite, because PLA has a low elongation at break and PBS has a high elongation at break, although the mechanical properties can be combined, the expected effect is still not achieved. Therefore, antibacterial filler is added, in which the amount of antibacterial filler is less than that of fiber powder. The toughening effect of fiber powder further improves the mechanical properties of the antibacterial soft fiber filaments, so that the final surface material has better antibacterial properties, skin-friendliness, flexibility, and smoothness.

[0061] In summary, this application has the following beneficial effects:

[0062] Because the antibacterial filler obtained by combining antibacterial filler with fiber powder has good filling, toughening and antibacterial properties; and after compounding with POE, polyamide resin, antibacterial filler and compatibilizer, the resulting antibacterial elastic fiber has a low coefficient of friction, good flexibility and good antibacterial properties, while the antibacterial soft fiber obtained by compounding PBS, antibacterial filler, PLA and plasticizer has good flexibility and antibacterial properties, the surface material made by combining antibacterial elastic fiber and antibacterial soft fiber in a weight ratio of 1:1.3-1.8 has good softness and antibacterial properties. Detailed Implementation

[0063] The present application will be further described in detail below with reference to the embodiments.

[0064] Sources of some raw materials:

[0065] Polyamide resin:

[0066] POE: Mitsui Chemicals, Japan, brand name MA9015;

[0067] PLA: Tensile strength 54 MPa (test method ISO 527-2), impact strength of a simply supported beam with a notched section 2.4 KJ / m 2 (Test method ISO 527-2);

[0068] PBS: Manufacturer: Shandong Yiweian Chemical Technology Co., Ltd., Model: YWA-Polybutylene succinate;

[0069] Chitosan: Deacetylation degree 85-90%, preferably 85% in the examples;

[0070] Polyvinylpyrrolidone (PVP) is a K30 powder with a nitrogen content of 11.5-12.8%.

[0071] The density of pregelatinized starch is 1.265 g / kg.

[0072] PTW compatibilizer manufacturer: DuPont, USA; Model: PTW.

[0073] The distillers' grains powder, collagen powder, chitosan, orange peel powder, needle leaf powder, banana fiber powder, lemon fiber powder, and corn fiber powder in this application all have a mesh size greater than 300 mesh.

[0074] The antibacterial elastic fiber filament and antibacterial soft fiber filament of this application have a diameter of 10-50D, preferably 30D, and a length of 1-10mm, preferably 5mm.

[0075] Example

[0076] Example 1

[0077] A method for preparing a top layer material for diapers includes the following steps:

[0078] Antibacterial elastic fiber filament: Weigh antibacterial filler (distillers' grains powder) and fiber powder (banana fiber powder) in a weight ratio of 2.8:1, mix them evenly to obtain antibacterial filler; Weigh 20 kg of polyamide resin, 1 kg of POE and 10 kg of antibacterial filler and add them to a high-speed mixer, mix them evenly, then put them into a kneader and heat them to 110°C, stir for 50 min to obtain a mixture. Transfer the mixture to the feed port of a twin-screw extruder and let it enter the extruder for extrusion. Weigh and measure it to obtain a pre-spun fabric. Put the pre-spun fabric into a spinning equipment for spinning to obtain filaments. Cut the filaments to obtain antibacterial elastic fiber filaments.

[0079] Antibacterial soft fiber filaments: Weigh antibacterial filler (distillers' grains powder) and fiber powder (banana fiber powder) in a weight ratio of 1:2.5, mix them evenly to obtain antibacterial filler; weigh 18kg PLA, 5kg PBS, 2kg environmentally friendly plasticizer, and 14kg antibacterial filler, add them to a high-speed mixer, mix them evenly, then put them into a kneader and heat them to 110℃, stir for 50 minutes to obtain a mixture. Transfer the mixture to the feed port of a twin-screw extruder, let it enter the extruder for extrusion, weigh and measure it to obtain a pre-spun fabric, put the pre-spun fabric into a spinning equipment for spinning to obtain filaments, cut the filaments to obtain antibacterial soft fiber filaments.

[0080] Surface material production: Antibacterial elastic fiber filaments and antibacterial soft fiber filaments are mixed evenly at a weight ratio of 1:1.3, and then needled in a needle-punching device to obtain the surface material.

[0081] Example 2-3

[0082] The difference between Examples 2-3 and Example 1 is that the composition of the raw materials is different, as shown in Table 1.

[0083] Table 1. Raw material consumption (kg) for Examples 1-3

[0084]

[0085]

[0086] Example 4

[0087] The difference between Example 4 and Example 1 is that the fiber powder is obtained by compounding needle leaf powder and lemon fiber powder in a weight (kg) ratio of 1:1.

[0088] Example 5

[0089] The difference between Example 5 and Example 1 is that the fiber powder is obtained by compounding banana fiber powder and corn fiber powder in a weight (kg) ratio of 1:1.

[0090] Example 6

[0091] The difference between Example 6 and Example 1 is that the antibacterial filler is composed of distillers' grains powder, collagen powder and chitosan in a weight (kg) ratio of 1.5:2.5:1.

[0092] Example 7

[0093] The difference between Example 7 and Example 1 is that the antibacterial filler is composed of distillers' grains powder, collagen powder, and orange peel powder in a weight (kg) ratio of 1.2:1:2.

[0094] Example 8

[0095] The difference between Example 8 and Example 1 is that the antibacterial filler is composed of distillers' grains powder, collagen powder, chitosan, and orange peel powder in a weight (kg) ratio of 2.5:1:1.5:1.

[0096] Example 9

[0097] The difference between Example 9 and Example 6 is that the fiber powder is composed of needle leaf powder, banana fiber powder and lemon fiber powder in a weight (kg) ratio of 1:2.5:0.3.

[0098] Example 10

[0099] The difference between Example 10 and Example 7 is that the fiber powder is composed of needle leaf powder, banana fiber powder and corn fiber powder in a weight (kg) ratio of 1:2.1:2.

[0100] Example 11

[0101] The difference between Example 11 and Example 8 is that the fiber powder is composed of needle leaf powder, banana fiber powder, lemon fiber powder and corn fiber powder in a weight (kg) ratio of 1:1.8:0.5:1.3.

[0102] Example 12

[0103] The difference between Example 12 and Example 11 is that the antibacterial filler is treated with a surface treatment agent. The treatment process is as follows: 3 kg of antibacterial filler is weighed and added to a mixer containing 1.8 kg of surface treatment agent. The mixture is heated to 50°C, stirred for 25 min at a stirring speed of 20 r / min, and then filtered in a filter. The resulting solid residue is dried in an oven at 50°C and then ground in a grinder. The residue is then sieved through a 300-mesh sieve to obtain the antibacterial filler.

[0104] The surface treatment agent is prepared by the following steps: Weigh 3 kg of γ-piperazinylpropylmethyldimethoxysilane, 1 kg of sodium carboxymethyl cellulose, 1 kg of pregelatinized starch, 2 kg of polyvinylpyrrolidone and 42 kg of water, mix them evenly, heat to 80°C, and stir for 50 min to obtain the surface treatment agent.

[0105] Comparative Example

[0106] Comparative Example 1

[0107] The difference between Comparative Example 1 and Example 1 is that only antibacterial elastic fiber filaments were used for needle punching to obtain the surface fabric. The specific process is as follows:

[0108] Antibacterial elastic fiber filaments: Weigh antibacterial filler (distillers' grains powder) and fiber powder (banana fiber powder) in a weight ratio of 2.8:1, mix them evenly to obtain antibacterial filler; weigh 20 kg of polyamide resin, 1 kg of POE and 10 kg of antibacterial filler and add them to a high-speed mixer, mix them evenly, then put them into a kneader and heat them to 110°C, stir for 50 min to obtain a mixture. Transfer the mixture to the feed port of a twin-screw extruder and let it enter the extruder for extrusion. Weigh and measure it to obtain a pre-spun fabric. Put the pre-spun fabric into a spinning equipment for spinning to obtain filaments. Cut the filaments to obtain antibacterial elastic fiber filaments.

[0109] Surface material production: Antibacterial elastic fiber filaments are put into a needle punching device for needle punching to obtain the surface material.

[0110] Comparative Example 2

[0111] The difference between Comparative Example 2 and Example 1 is that only antibacterial flexible fiber filaments were used for needle punching to obtain the surface fabric. The specific process is as follows:

[0112] Antibacterial soft fiber filaments: Weigh antibacterial filler (distillers' grains powder) and fiber powder (banana fiber powder) in a weight ratio of 1:2.5, mix evenly to obtain antibacterial filler; weigh 18kg PLA, 5kg PBS, 2kg environmentally friendly plasticizer, and 14kg antibacterial filler, add to a high-speed mixer, mix evenly, then put into a kneader and heat to 110℃, stir for 50min to obtain a mixture, transfer the mixture to the feed port of a twin-screw extruder, let it enter the extruder for extrusion, weigh and measure to obtain pre-spun fabric, put the pre-spun fabric into spinning equipment for spinning to obtain filaments, and obtain antibacterial soft fiber filaments.

[0113] Surface material production: Antibacterial soft fiber filaments are put into a needle punching device for needle punching to obtain the surface material.

[0114] Comparative Example 3

[0115] The difference between Comparative Example 3 and Example 1 is that the fiber powder (banana fiber powder) was replaced with an antibacterial filler (distillers' grains powder) in equal amounts.

[0116] Comparative Example 4

[0117] The difference between Comparative Example 4 and Example 1 is that the antibacterial filler (distillers' grains powder) was replaced with an equal amount of fiber powder (banana fiber powder).

[0118] Performance testing

[0119] Detection methods / test methods

[0120] The surface materials obtained from Examples 1-12 and Comparative Examples 1-4 were subjected to the following performance tests.

[0121] 1. Softness test

[0122] Softness test: Referring to GB / T 8942-2016 standard, the testing instrument was a PY-H613 microcomputer softness tester. The test result in "Determination of Paper Softness" (8942-2016) is the sum of the maximum vector of the bending resistance of the sample itself and the friction force between the sample and the gap. The smaller the instrument reading, the softer the sample. Specifically, the surface materials obtained from Examples 1-12 and Comparative Examples 1-4 were placed in a constant temperature and humidity environment of 25°C and 55% for 72 hours. Then, five 100mm*100mm square samples were cut 5cm from the edge of the fabric and softness tests were performed on them. The longitudinal softness was calculated as: longitudinal softness = measured longitudinal softness × 100mm ÷ transverse dimension of the sample; transverse softness was calculated as: transverse softness × 100mm ÷ longitudinal dimension of the sample. The longitudinal and transverse softness of each sample were recorded and the average value was taken. Softness = (average value of transverse softness + average value of longitudinal softness) / 2. The specific data are shown in Table 2.

[0123] 2. Antibacterial rate

[0124] The surface materials obtained in Examples 1-12 and Comparative Examples 1-4 were tested for antibacterial properties in accordance with GB / T 20944.2-2007. The inhibition rates of Escherichia coli and Staphylococcus aureus were tested and recorded after rinsing three times. The specific data are shown in Table 2.

[0125] Table 2. Experimental data of Examples 1-12 and Comparative Examples 1-4

[0126]

[0127]

[0128] Based on Example 1 and Comparative Examples 1-2 and Table 2, it can be seen that the antibacterial properties of Example 1 are lower than those of Comparative Examples 1-2, and the softness is also lower than that of Comparative Examples 1-2. This indicates that when antibacterial flexible fiber filaments or antibacterial elastic fiber filaments are used alone, the softness and antibacterial properties of the resulting surface material are reduced.

[0129] Comparative Examples 1 and 3-4 show that the antibacterial activity of Example 1 is lower than that of Comparative Examples 3-4, and the softness is also lower than that of Comparative Examples 3-4. This indicates that when the antibacterial filler (distillers' grains powder) and fiber powder (banana fiber powder) are used as composite fillers, the resulting surface material has better antibacterial and soft properties. When used in diapers for infants and young children, it reduces the possibility of erythema on the skin of infants and young children.

[0130] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A surface material for diapers, characterized in that, The surface material is prepared by mixing antibacterial elastic fiber filaments and antibacterial soft fiber filaments in a weight ratio of 1:1.3-1.8; The antibacterial elastic fiber filament is made from the following raw materials in parts by weight: 20-30 parts polyamide resin, 1-10 parts POE, 0.5-3 parts compatibilizer, and 10-18 parts antibacterial filler. The antibacterial filler is obtained by mixing antibacterial filler and fiber powder in a weight ratio of (2.8-4.6):

1. The antibacterial soft fiber filament is made from the following raw materials in parts by weight: 18-25 parts PLA, 5-12 parts PBS, 2-5 parts environmentally friendly plasticizer, and 14-22 parts antibacterial filler; the antibacterial filler is obtained by mixing antibacterial filler and fiber powder in a weight ratio of 1:(2.5-3.5); the antibacterial filler is composed of at least three of the following: distillers' grains powder, collagen powder, chitosan, and orange peel powder. The fiber powder is composed of at least three of the following: needle leaf powder, banana fiber powder, lemon fiber powder, and corn fiber powder. The antibacterial filler is an antibacterial filler treated with a surface treatment agent, which is composed of the following raw materials in parts by weight: 3-8 parts of γ-piperazinylpropylmethyldimethoxysilane 1-3 parts of sodium carboxymethyl cellulose Polyvinylpyrrolidone 1.5-3.5 parts 1-3 parts of pregelatinized starch 35-50 parts water.

2. The surface material for diapers according to claim 1, characterized in that, The surface treatment agent is obtained by the following method: Weigh out γ-piperazinylpropylmethyldimethoxysilane, sodium carboxymethyl cellulose, pregelatinized starch, polyvinylpyrrolidone and water according to the weight, mix them evenly, heat to 75-85℃, stir for 30-60 minutes to obtain the surface treatment agent.

3. The surface material for diapers according to claim 2, characterized in that, The antibacterial filler is prepared by the following steps: Weigh 20-40 parts of antibacterial filler by weight, add it to 15-30 parts of surface treatment agent, heat to 40-55℃, stir for 20-50 minutes, filter, dry, grind, and sieve through a 300-500 mesh to obtain antibacterial filler.

4. The surface material for diapers according to claim 1, characterized in that: The environmentally friendly plasticizer is epoxidized soybean oil; the compatibilizer is PTW compatibilizer.

5. A method for preparing a surface layer material for diapers as described in any one of claims 1-4, characterized in that, Includes the following steps: Antibacterial elastic fiber filament: Weigh 20-30 parts of polyamide resin, 1-10 parts of POE, 0.5-3 parts of compatibilizer, and 10-18 parts of antibacterial filler by weight, mix evenly, heat to 105-115℃, stir for 40-60 minutes, extrude, measure, and spin to obtain antibacterial elastic fiber filament. Antibacterial soft fiber filament: By weight, PLA 18-25 parts, PBS 5-12 parts, environmentally friendly plasticizer 2-5 parts, antibacterial filler 14-22 parts are mixed evenly, heated to 105-115℃, stirred for 40-60 minutes, extruded, metered, and spun to obtain antibacterial soft fiber filament. Surface material production: Antibacterial elastic fiber filaments and antibacterial soft fiber filaments are mixed evenly in a weight ratio of 1:1.3-1.8, and then needle-punched to obtain the surface material.

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