Dry and antibacterial non-woven composite material surface layer and preparation method thereof

Abstract

The invention belongs to the field of personal hygiene care, and relates to a dry, comfortable and bacteriostatic non-woven composite material surface layer and a preparation method thereof.According to the dry, comfortable and bacteriostatic non-woven composite material surface layer, a hot air non-woven fabric serves as the upper layer of the skin-friendly surface, and the lower layer of the skin-friendly surface is an orange slice fiber net formed by spunlace splitting of orange slice fibers; the upper layer and the lower layer are bonded through a spunlace reinforcing technology. A preparation method of a dry, comfortable and bacteriostatic non-woven composite material surface layer comprises the following steps: taking a hot air non-woven fabric as a base fabric, after the hot air non-woven fabric is rolled out, feeding orange segment fibers to the upper part of the base fabric, carrying out spunlace splitting, stripping and cracking orange segment fiber monofilaments to form a plurality of profiled fibers, and drying the profiled fibers to obtain the dry, comfortable and bacteriostatic non-woven composite material surface layer. And bonding the foreign fibers with the fibers of the hot air non-woven fabric by using spunlace reinforcement. According to the dry and comfortable antibacterial non-woven composite material surface layer and the preparation method thereof, the prepared surface layer absorbs liquid and is fast in infiltration, fluffy, soft, good in hand feeling and small in liquid residual quantity.

Description

Technical Field

[0001] The present invention relates to the field of personal hygiene care products, and particularly to a dry and bacteriostatic non-woven composite material surface layer and a preparation method thereof. Background Art

[0002] Personal hygiene care products, such as various sanitary napkins and panty liners for women, children's and adult diapers, and various urine isolation mattresses, etc., due to their special use environment, sanitary care products with dry and bacteriostatic functions will bring users a safe and reassuring experience.

[0003] With the increasing trend of population aging in China, among the elderly population, the number of disabled and semi-disabled elderly people exceeds 40 million, which has greatly increased the demand for adult incontinence hygiene products; the growth of the Chinese maternal and infant FMCG market, especially the demand for sanitary products such as baby diapers, has also increased year by year; the dryness and bacteriostasis of sanitary napkins and panty liners for women can also avoid fungal or various bacterial infections. For such disposable hygiene products, as the surface layer is the material directly contacting the human skin, its comfort, functionality, and health are particularly important, and play a decisive role in the overall comfort of sanitary napkins, panty liners, diapers, and urine isolation pads, etc., and have also received more and more attention in recent years.

[0004] The surface layer materials of disposable diapers on the current market are mainly spunbond nonwoven materials, thermal bonded nonwoven materials and spunlace nonwoven materials. For example, in CN110344174A, a combined spunlace nonwoven fabric for the absorbent surface layer of personal hygiene care products includes a first fiber layer and a second fiber layer which are laminated and connected up and down; 70-100wt% of hydrophilic fibers are contained in the first fiber layer; 80-100wt% of hydrophobic fibers are contained in the second fiber layer; the fibers in the first fiber layer and the second fiber layer are entangled with each other; several protrusions and several through holes penetrating the second fiber layer are distributed on the surface of the first fiber layer; the opening area of the through holes on the top surface of the first fiber layer is larger than that on the bottom surface of the second fiber layer. This patent uses the spunlace method, there are through holes in the first fiber layer, and the liquid penetrates into the second layer of hydrophobic fibers, accelerating the penetration of the liquid into the diversion layer, thereby reducing the retention of liquid on the surface layer. In CN109440301A, a hemp thermal bonded nonwoven material for hygiene care products and its preparation method, the hemp fibers are mixed with thermal bonding fibers (ES bicomponent fibers), and then through opening and cleaning of cotton, rough opening, fine opening, pneumatic feeding of cotton, carding into a web, and thermal bonding reinforcement in sequence, the hemp thermal bonded nonwoven material can be obtained; this nonwoven material is made by the thermal bonding process. The spunlace nonwoven material is used as the surface layer material, which has a certain water absorption, but it will cause a long time for the liquid to penetrate through the surface layer to the liquid storage layer, and there will also be a large amount of rewetting due to external forces, which is extremely easy to form a humid environment and the human comfort is poor; the spunbond nonwoven fabric material has high strength and low cost, and due to continuous long filaments and dense fiber arrangement, the rewetting is better, but the overall is too hard, the hand feeling is poor and not skin-friendly, and it is not easy to be used as a skin-friendly surface layer; when the thermal bonded nonwoven material made of ES fibers is used as the surface layer, hydrophilic finishing is required to make it easy to absorb liquid, penetrate quickly, be fluffy and soft, and have a good hand feeling. However, when applied to disposable diapers, the liquid penetrates quickly, and at the same time, the liquid is also very easy to rewet from the core layer of the disposable diaper, and the surface layer of the disposable diaper will become very wet and difficult to disperse, resulting in poor overall thermal and wet comfort. Summary of the Invention

[0005] The purpose of the present invention is to provide a dry and bacteriostatic nonwoven composite material surface layer and its preparation method, and the prepared surface layer has fast liquid absorption and penetration, is fluffy and soft, has a good hand feeling, and has less liquid residue.

[0006] In order to solve the above technical problems, the dry and bacteriostatic nonwoven composite material surface layer and its preparation method provided by the present invention are realized as follows:

[0007] A dry and bacteriostatic nonwoven composite material surface layer, with a thermal bonded nonwoven fabric as the upper skin-friendly surface layer, and the lower layer is an orange petal fiber web formed by water jet opening of orange petal fibers, and the upper layer and the lower layer are bonded by a spunlace reinforcement process.

[0008] Optionally, the hot air non-woven fabric is an ES double fiber, the gram weight of the hot air non-woven fabric is 24-30 gsm, and the fineness of the fiber used for the hot air non-woven fabric is 1.5-2.0 dtex.

[0009] Optionally, the orange petal fiber is formed by splitting the PET and PA6 melts with a split-type distribution plate and extruding them through the same spinneret hole.

[0010] Optionally, the gram weight of the orange petal fiber web is 8-12 gsm; the fineness of the orange petal fiber is 1-1.5 dtex, and the length is 30-40 mm.

[0011] Optionally, the skin-friendly surface layer of the hot air non-woven fabric contains antibacterial components, and the antibacterial components are: tea polyphenols, centella asiatica, vitamin E, and zinc oxide. The addition amounts of tea polyphenols and centella asiatica are 10% of the weight of the skin-friendly surface layer, and the addition amounts of vitamin E and zinc oxide are 0.1% of the weight of the skin-friendly surface layer.

[0012] The present invention also provides a method for preparing a dry and antibacterial non-woven composite material surface layer. Using the hot air non-woven fabric as the base fabric, after the hot air non-woven fabric is unrolled, the orange petal fiber is fed above the base fabric for hydroentangling to split the single filaments of the orange petal fiber to form multiple profiled fibers, and then the multiple profiled fibers and the fibers of the hot air non-woven fabric are bonded by hydroentangling reinforcement.

[0013] Optionally, the water temperature of the hydroentangling device during hydroentangling is 60-80 °C.

[0014] Optionally, before hydroentangling, a pre-hydroentangling procedure is carried out with a hydroentangling pressure of 35 bar; during hydroentangling, the hydroentangling pressure is 70 bar; for hydroentangling reinforcement, the hydroentangling pressure is 80 bar.

[0015] Optionally, after hydroentangling reinforcement, the non-woven composite material surface layer is dried by a drying device, and the temperature of the drying device is 80-100 °C.

[0016] Optionally, for the non-woven composite material surface layer dried by the drying device, antibacterial components are added to the upper layer of the non-woven composite material surface layer by an ultrasonic atomization device, and the method of adding the antibacterial components is the microcapsule process method.

[0017] The dry and bacteriostatic non-woven composite material surface layer provided by the present invention has a hot air non-woven fabric as the skin-friendly surface of the upper layer and a fiber layer containing orange petal fibers as the lower layer, forming a double-layer gradient structure with sparse upper and dense lower, having obvious differential capillary action; when a liquid contacts the upper-layer sparse hot air non-woven fabric, due to the large gaps between its fibers, the liquid will quickly infiltrate downward. When it reaches the orange petal ultra-fine fibers, the internal structure of the orange petal fibers has many tiny pores, and the pores have absorption ability to temporarily store the liquid, and then conduct the liquid to the core layer through the core absorption process of the diaper to lock the liquid. Compared with the diaper surface layer that separately uses spunbond non-woven materials, hot air non-woven materials, and hydrospun non-woven materials in the prior art, the present invention has fast liquid absorption and infiltration, is fluffy and soft, has a good hand feeling, and has less re-infiltration. It can be used as the surface layer of infant diapers, women's sanitary napkins, and adult diapers, and can also be used as the surface layer of urine pads. When absorbing, it can achieve the effect of point-like infiltration on the contact surface and planar diffusion and diversion on the lower layer. The liquid diffusion area on the contact surface is small, and at the same time, the liquid residue amount is also smaller, meeting the application requirements of a dry contact surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present invention will become readily understandable. In the drawings, several embodiments of the present invention are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0019] Figure 1 is a schematic diagram of the structure of the dry and bacteriostatic non-woven composite material surface layer provided by the present invention and a schematic diagram of liquid infiltration;

[0020] Figure 2 is a comparison chart of the surface diffusion lengths of Examples 1-4 and Comparative Examples 1-4 of the dry and bacteriostatic non-woven composite material provided by the present invention;

[0021] Figure 3 is a comparison chart of the core diffusion lengths of Examples 1-4 and Comparative Examples 1-4 of the dry and bacteriostatic non-woven composite material provided by the present invention;

[0022] Figure 4 is a comparison chart of the liquid residue amounts of Examples 1-4 and Comparative Examples 1-4 of the dry and bacteriostatic non-woven composite material provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the objects, technical solutions, and advantages of the present invention clearer, the following examples are used to further describe the present invention in detail. It should be understood that the specific examples described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] In the experimental methods of the following embodiments, unless otherwise specified, they are all conventional methods, carried out according to the techniques or conditions described in the literature in this field or according to the product specifications. The materials, reagents, etc. used in the following embodiments, unless otherwise specified, can be obtained from commercial channels.

[0025] The ES fiber used in the present invention is a bicomponent low-melting-point hot-melt fiber. Its core layer is polypropylene (PP) or PET (Polyethylene terephthalate), which is a condensate of terephthalic acid and ethylene glycol and serves as the main fiber. The skin layer is polyethylene (PE), which serves as the hot-melt adhesive. The hot-air non-woven fabric used in the present invention is a bicomponent fiber of ES fiber, provided by Henan Zhengxin Medical Materials Technology Co., Ltd.

[0026] The orange-petal fiber used in the present invention is a 32-lobe hollow orange-petal fiber with a fiber length of 51 - 54 mm and a fiber fineness of 2.5 D. The raw material components are: PET: PA6 (nylon 6) = 70%: 30%. The antibacterial component is a tea polyphenol microcapsule in liquid form, provided by Tianjin Polymer Core Energy Health Protection Technology Co., Ltd.

[0027] The orange-petal fiber used in the present invention is a composite fiber. The composite fiber is prepared by splitting two polymer melts through a splitting-type distribution plate and then extruding and forming them in the same spinneret hole. Each single filament or filament bundle of each composite fiber contains two or more different components, and the single filaments can be split by physical or chemical methods during post-processing to become finer multi-filament profiled fibers. The orange-petal fiber is divided into eight petals by the orange-petal technology, increasing the fiber surface area and the number of pores in the fabric. Relying on the capillary core absorption effect, enhancing the water absorption effect, and rapid water absorption and rapid drying become its remarkable characteristics.

[0028] A dry and bacteriostatic non-woven material is composed of a hot-air non-woven fabric as the base fabric, orange petal fibers and bacteriostatic components; the material composition of the hot-air non-woven fabric is ES bicomponent fibers, with 50% of the fibers having a fineness of 1.5 dtex and 50% having a fineness of 2.0 dtex, which will play the role of the main fiber (PP) or PET (polyester), and the cortical polyethylene (PE) are blended, and then the fiber raw materials are opened by a coarse opener to loosen the fibers and remove impurities; then fine opening is carried out. Fine opening is the second stage of fiber opening, and the main purpose is to further loosen the fibers to make them reach the single fiber state or close to the single fiber state, and at the same time further remove fine impurities. The fibers are carded into a uniform web by a double carding machine. During the carding process, the fibers will be arranged directionally or randomly to form a web structure with a certain thickness. Then hot-air consolidation is carried out. The carded web is sent into a hot-air oven, and the hot air penetrates the web to make the fibers heat-melt and bond. The temperature of the hot air is usually lower than the melting point of the main fiber to avoid excessive shrinkage or damage of the fibers. The present invention uses bicomponent fibers to form a dot-like bonding structure under the action of hot air, enhancing the strength and softness of the non-woven fabric. Finally, it is cooled and formed, slit and finished to make a hot-air non-woven fabric with a basis weight of 24 gsm.

[0029] The obtained hot-air non-woven fabric is rolled out, the orange petal fibers are opened, carded, and laid flat on the hot-air non-woven fabric base fabric. After being hydroentangled three times, it is formed into a web, dried, and then the 5% microcapsule antibacterial functional finishing agent is sprayed on the surface of the non-woven fabric by an ultrasonic atomization device to obtain a non-woven material with a basis weight of 32 gsm.

[0030] Example 2

[0031] 1. A dry and bacteriostatic non-woven material is composed of a hot-air non-woven fabric as the base fabric, orange-petal fibers and a bacteriostatic component; the material composition of the hot-air non-woven fabric is ES bicomponent fibers, with 50% of the fibers having a fineness of 1.5 dtex and 50% having a fineness of 2.0 dtex, which will act as the main body fibers (PP) or PET (polyester), and the cortical polyethylene (PE) are blended. Then, the fiber raw materials are opened by a coarse opener to loosen the fibers and remove impurities; then, fine opening is carried out. Fine opening is the second stage of fiber opening, and its main purpose is to further loosen the fibers to make them reach the single-fiber state or close to the single-fiber state, and at the same time further remove fine impurities. The fibers are carded into a uniform web by a double carding machine. During the carding process, the fibers will be oriented or randomly arranged to form a web structure with a certain thickness. Then, hot-air consolidation is carried out. The carded web is sent into a hot-air oven, and the hot air penetrates the web to make the fibers heat-melt and bond. The temperature of the hot air is usually lower than the melting point of the main body fibers to avoid excessive shrinkage or damage of the fibers. In the present invention, bicomponent fibers are used to form a dot-like bonding structure under the action of hot air, enhancing the strength and softness of the non-woven fabric. Finally, cooling and shaping are carried out to make a hot-air non-woven fabric with a basis weight of 24 gsm;

[0032] 2. The obtained hot-air non-woven fabric is unrolled, the orange-petal fibers are opened, carded, and laid flat on the hot-air non-woven fabric base fabric. After being hydroentangled three times, it is formed into a web, dried, and then the 5% microcapsule antibacterial functional finishing agent is sprayed on the surface of the non-woven fabric by an ultrasonic atomization device to obtain a non-woven material with a basis weight of 34 gsm.

[0033] Example 3

[0034] 1. A dry and bacteriostatic non-woven material is composed of a hot-air non-woven fabric as the base fabric, orange petal fibers and bacteriostatic components; the material composition of the hot-air non-woven fabric is ES bicomponent fibers, with 50% of the fibers having a fineness of 1.5 dtex and 50% having a fineness of 2.0 dtex, which will act as the main body fibers (PP) or PET (polyester), and the cortical polyethylene (PE) are blended. Then, the fiber raw materials are opened by a coarse opener to loosen the fibers and remove impurities; then, fine opening is carried out. Fine opening is the second stage of fiber opening, and the main purpose is to further loosen the fibers to make them reach the single fiber state or close to the single fiber state, and at the same time further remove fine impurities. The fibers are carded into a uniform web by a double carding machine. During the carding process, the fibers will be oriented or randomly arranged to form a web structure with a certain thickness. Then, hot-air consolidation is carried out. The carded web is sent into a hot-air oven, and the hot air penetrates the web to make the fibers heat-melt and bond. The temperature of the hot air is usually lower than the melting point of the main body fibers to avoid excessive shrinkage or damage of the fibers. In the present invention, bicomponent fibers are used to make the fibers form a dot-like bonding structure under the action of hot air, enhancing the strength and softness of the non-woven fabric. Finally, it is cooled and formed into a hot-air non-woven fabric with a basis weight of 26 gsm;

[0035] 2. The obtained hot-air non-woven fabric is unrolled, the orange petal fibers are opened, carded, and laid flat on the hot-air non-woven fabric base fabric. After being hydroentangled three times, it is formed into a web, dried, and then a 5% microcapsule antibacterial functional finishing agent is sprayed on the surface of the non-woven fabric by an ultrasonic atomization device to obtain a non-woven material with a basis weight of 38 gsm.

[0036] Example 4

[0037] A dry and bacteriostatic non-woven material consists of a hot air non-woven fabric as the base fabric, orange petal fibers and a bacteriostatic component; the material composition of the hot air non-woven fabric is ES bicomponent fibers, with 50% of the fibers having a fineness of 1.5 dtex and 50% having a fineness of 2.0 dtex, which will act as the main body fibers (PP) or PET (polyester), and the cortical polyethylene (PE) are blended. Then the fiber raw materials are opened by a coarse opener to loosen the fibers and remove impurities; then fine opening is carried out. Fine opening is the second stage of fiber opening, and the main purpose is to further loosen the fibers to make them reach the single fiber state or close to the single fiber state, and at the same time further remove fine impurities. The fibers are carded into a uniform fiber web by a double carding machine. During the carding process, the fibers will be oriented or randomly arranged to form a fiber web structure with a certain thickness. Then hot air consolidation is carried out. The carded fiber web is sent into a hot air oven, and the hot air penetrates the fiber web to make the fibers heat-melt and bond. The temperature of the hot air is usually lower than the melting point of the main body fibers to avoid excessive shrinkage or damage of the fibers. The present invention uses bicomponent fibers to form a dot-like bonding structure under the action of hot air, enhancing the strength and softness of the non-woven fabric. Finally, cooling and forming are carried out to make a hot air non-woven fabric with a basis weight of 28 gsm;

[0038] 2. The obtained hot air non-woven fabric is wound, the orange petal fibers are opened, carded, and laid flat on the hot air non-woven fabric base fabric, and then formed into a web after 3 passes of hydroentangling, dried, and then the 5% microcapsule antibacterial functional finishing agent is sprayed on the surface of the non-woven fabric by an ultrasonic atomization device to obtain a non-woven material with a basis weight of 40 gsm.

[0039] After the dry and bacteriostatic non-woven materials are prepared in Examples 1 to 4 of the present invention, a bacteriostatic component is added to the skin-friendly surface layer of the hot air non-woven fabric. The bacteriostatic component is: tea polyphenols, centella asiatica, vitamin E and zinc oxide. The addition amounts of the tea polyphenols and centella asiatica are 10% of the weight of the skin-friendly surface layer, and the addition amounts of the vitamin E and zinc oxide are 0.1% of the weight of the skin-friendly surface layer. The ratio of tea polyphenols and centella asiatica can be configured according to specific needs, and the ratio of vitamin E and zinc oxide can also be configured according to specific needs. The present invention does not limit this.

[0040] The process of adding the bacteriostatic component is the microcapsule process. The microcapsule technology is a technology in which trace substances are wrapped in a polymer film. It is to completely coat the target substance (core or inner phase) with a continuous film (wall or outer phase) made of various natural or synthetic high-molecular compounds without any damage to the original properties of the target substance, and then the function of the target substance is presented again externally through certain external stimuli or slow release effects. The microcapsule form can be attached to the surface layer as particles under normal conditions without acting, and release the active ingredients under the conditions of humidity, temperature, and friction to achieve the bacteriostatic effect. Compared with the conventional process of attaching the bacteriostatic component to the surface layer by impregnation or coating, the present invention has better stability.

[0041] Comparative Example 1

[0042] The hot air non-woven fabric produced by Henan Zhengxin Medical Materials Technology Co., Ltd. was selected, with a basis weight of 32 gsm, a fiber fineness of 1.5 D, and a proportion of 100%. It has the same basis weight as the hot air non-woven fabric of the present invention, and the dryness and surface diffusion length were detected and compared.

[0043] Comparative Example 2

[0044] The conventional hot air non-woven fabric of Henan Zhengxin Medical Materials Technology Co., Ltd. was still selected, with a basis weight greater than that of the present invention, which is 36 gsm, a fiber fineness of 1.5 D, and a proportion of 100%.

[0045] Comparative Example 3

[0046] The conventional hot air non-woven fabric of Henan Zhengxin Medical Materials Technology Co., Ltd. was still selected, with a basis weight greater than that of the present invention, which is 38 gsm, a fiber fineness of 1.5 D, and a proportion of 100%.

[0047] Comparative Example 4

[0048] The conventional hot air non-woven fabric of Henan Zhengxin Medical Materials Technology Co., Ltd. was still selected, with a basis weight greater than that of the present invention, which is 40 gsm, a fiber fineness of 1.5 D, and a proportion of 100%.

[0049] Experimental process

[0050] The dryness and surface diffusion length of Examples 1-4 and Comparative Examples 1-4 were measured, and the test method is as follows:

[0051] An absorbent core and a non-woven fabric sample of 170*70 mm were cut. Before the experiment, the mass of the non-woven fabric strip was weighed as M1. The product was subjected to two fixed-point liquid additions using a liquid addition device, with each liquid addition volume of 10 ml of physiological saline. The liquid diffusion length and width were measured with a ruler, and the two liquid addition times were 0 min and 5 min respectively;

[0052] After the test, the mass of the non-woven fabric strip was weighed as M2, and the liquid residue of the non-woven fabric = M2 - M1

[0053]

[0054] From the above table, and Figure 2 、 Figure 3 and Figure 4It can be seen that the surface diffusion lengths of Examples 1 to 4 of the present invention are significantly lower than those of Comparative Examples 1 to 4, but the core diffusion length is higher than that of the comparative examples, and the liquid residue amounts of Examples 1 to 4 of the present invention are much lower than those of Comparative Examples 1 to 4. This shows that the core of the present invention has strong diffusion ability, the liquid can be evenly distributed in the core, making full use of the capacity of the absorbent material and avoiding leakage caused by local saturation; the final test proves that, as Figure 4 shown, the liquid residue amount of the present invention is much lower than that of the comparative example.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dry and antibacterial nonwoven composite material surface layer, characterized in that: The upper layer of the skin-friendly surface is a hot air nonwoven fabric, and the lower layer is a pie fiber net formed by hydroentanglement of pie fibers. The upper layer and the lower layer are bonded by a hydroentanglement reinforcement process.

2. The dry and antibacterial nonwoven composite material surface layer according to claim 1, characterized in that: The hot air nonwoven fabric is ES double fiber, the gram weight of the hot air nonwoven fabric is 24-30gsm, and the fineness of the fiber used in the hot air nonwoven fabric is 1.5-2.0dtex.

3. The dry and antibacterial nonwoven composite material surface layer according to claim 1 or 2, characterized in that: The orange segment fiber is formed by diverting the PET and PA6 melts by a split distribution plate and extruding them in the same spinneret hole.

4. The dry and antibacterial nonwoven composite material surface layer according to claim 3, characterized in that: The gram weight of the orange peel fiber web is 8-12 gsm; the fineness of the orange peel fiber is 1-1.5 dtex, and the length is 30-40 mm.

5. The dry and antibacterial nonwoven composite material surface layer according to claim 4, characterized in that: The upper layer of the skin-friendly surface of the hot air non-woven fabric contains antibacterial ingredients, which are: tea polyphenols, Centella asiatica, vitamin E and zinc oxide. The added amount of tea polyphenols and Centella asiatica is 10% of the weight of the upper layer of the skin-friendly surface, and the added amount of vitamin E and zinc oxide is 0.1% of the weight of the upper layer of the skin-friendly surface.

6. A method for preparing a dry and antibacterial nonwoven composite material surface layer, characterized in that: A hot air nonwoven fabric is used as a base fabric. After the hot air nonwoven fabric is unrolled, orange peel fibers are fed onto the base fabric, and hydroentanglement is performed to open the orange peel fiber monofilaments to form a plurality of special-shaped fibers. Hydroentanglement reinforcement is then used to bond the plurality of special-shaped fibers to the fibers of the hot air nonwoven fabric.

7. The method for preparing the nonwoven composite material surface layer according to claim 5, characterized in that: The water temperature of the hydroentanglement device is 60-80°C during the hydroentanglement fiber opening.

8. The method for preparing the nonwoven composite material surface layer according to claim 5 or 6, characterized in that: Before the hydroentanglement fiber opening, a pre-hydroentanglement procedure is performed, and the hydroentanglement pressure is 35 bar; during the hydroentanglement fiber opening, the hydroentanglement pressure is 70 bar; and during the hydroentanglement reinforcement, the hydroentanglement pressure is 80 bar.

9. The method for preparing the nonwoven composite material surface layer according to claim 5 or 6, characterized in that: After the water spunlace reinforcement, the surface layer of the nonwoven composite material is dried by a drying device, and the temperature of the drying device is 80-100°C.

10. The method for preparing the nonwoven composite material surface layer according to claim 5 or 6, characterized in that: The non-woven composite material surface layer dried by the drying device is added with antibacterial components on the upper layer of the non-woven composite material surface layer by ultrasonic atomization equipment, and the method of adding the antibacterial components is a microcapsule process method.

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