Antibacterial skin-friendly elastic composite film

Abstract

This utility model discloses an antibacterial, skin-friendly, elastic composite film, comprising a composite film body, which includes a first elastic film layer, a second elastic film layer, and a fiber mesh layer sandwiched between the first and second elastic film layers. The bonding layer, while bonding the composite film body to the non-woven fabric layer, simultaneously integrates antibacterial powder particles between the composite film body and the non-woven fabric layer, achieving a relatively stable antibacterial effect on the outer side of the composite film body. The antibacterial effect on the inner side of the composite film body is achieved by coating the antibacterial protective layer. The composite film body is hot-pressed with a fiber mesh layer; under tension, the fiber mesh deforms into a parallelogram, uniformly dispersing stress. By incorporating a TPU hot melt adhesive powder layer, while ensuring elasticity, the low-melting-point fibers achieve self-adhesion with the composite film body, reducing the hardening problem caused by excessive use of adhesives in the elastic film.

Description

Technical Field

[0001] This utility model relates to the field of composite film technology, specifically to an antibacterial, skin-friendly, elastic composite film. Background Technology

[0002] In recent years, as consumers' demands for comfort, safety, and functionality in hygiene products have continued to rise, the material technology for disposable hygiene products such as diapers and sanitary napkins has also been continuously innovating. Among these, elastic films, as a key component, are widely used in areas such as the waistband and leg openings to provide a snug fit and dynamic comfort. However, existing elastic films still have the following technical challenges:

[0003] For example, insufficient antibacterial properties: Traditional elastic films (such as TPU, EVA, etc.) are prone to bacterial growth in humid environments such as sweat and urine when in long-term contact with the human body, leading to skin irritation or infection risks, especially in scenarios such as baby diapers and feminine sanitary napkins. In order to enhance the antibacterial effect of elastic films, an antibacterial layer needs to be added to the elastic film. The antibacterial function is mostly achieved through post-processing (such as spraying antibacterial agents), but the coating is easy to peel off and has poor durability. If the antibacterial agent is directly mixed into the film substrate, the active ingredients may be deactivated due to high-temperature processing. After long-term use, the surface of the elastic film cannot withstand the tensile force from the outside, causing the elastic film to break, resulting in a reduction in the antibacterial effect. Utility Model Content

[0004] To address the technical deficiencies in the background art, this utility model proposes a solution that solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows:

[0005] An antibacterial and skin-friendly elastic composite film includes a composite film body, the composite film body includes a first elastic film layer and a second elastic film layer and a fiber mesh layer sandwiched between the first elastic film layer and the second elastic film layer, an adhesive layer is provided on the end face of the second elastic film layer facing away from the first elastic film layer, and an antibacterial protective layer is provided on the end face of the first elastic film layer facing away from the second elastic film layer.

[0006] The bonding layer includes first elastic strips spaced apart along the length of the composite film body and second elastic strips spaced apart along the width of the composite film body. The first and second elastic strips are stacked alternately to form a plurality of adhesive protrusions. The bonding layer is filled with antibacterial powder particles.

[0007] As an improvement to the above solution, the first elastic strip and the second elastic strip are stacked at their intersections to form the adhesive protrusions, and the first elastic strip and the second elastic strip are stacked at their intersections to form a plurality of cavities, which are filled with the antibacterial powder particles.

[0008] As an improvement to the above solution, a non-woven fabric layer is laminated on one side of the composite film body corresponding to the bonding layer, and the bonding layer is hot-pressed to bond the composite film body and the non-woven fabric layer.

[0009] As an improvement to the above solution, the fiber web layer includes spandex fibers and PET fibers, which are arranged in a transverse and longitudinal direction and are hot-pressed together with the first elastic film layer and the second elastic film layer.

[0010] As an improvement to the above scheme, the single filament fineness of the spandex fiber is 15-30D, and the single filament fineness of the PET fiber is 50-75D.

[0011] As an improvement to the above solution, a first TPU hot melt adhesive powder layer is provided between the first elastic film layer and the fiber web layer, and a second TPU hot melt adhesive powder layer is provided between the second elastic film layer and the fiber web layer.

[0012] As an improvement to the above solution, the antibacterial protective layer includes an aqueous polyurethane coating and nano-silver particles, wherein the nano-silver particles are sandwiched in the aqueous polyurethane coating, and the aqueous polyurethane coating is applied to the end face of the first elastic film layer.

[0013] The beneficial effects of this utility model are as follows: the bonding layer integrates antibacterial powder particles between the composite membrane body and the non-woven fabric layer while bonding the composite membrane body and the non-woven fabric layer, achieving a relatively stable antibacterial effect on the outer side of the composite membrane body. The antibacterial effect on the inner side of the composite membrane body is achieved by coating the antibacterial protective layer. The composite membrane body is hot-pressed with a fiber mesh layer. When subjected to tensile stress, the fiber mesh deforms into a parallelogram, uniformly dispersing stress. By setting a TPU hot melt adhesive powder layer, while ensuring elasticity, the low-melting-point fibers achieve self-adhesion with the composite membrane body, reducing the hardening problem caused by excessive use of adhesives in the elastic membrane. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the composite membrane body of this utility model in its unfolded state.

[0015] Figure 2 This is a schematic diagram of the composite membrane body in the thickness direction of this utility model.

[0016] Figure 3 This is a schematic diagram of the bonding layer of this utility model.

[0017] The composite membrane body 1, first elastic membrane layer 101, second elastic membrane layer 102, fiber mesh layer 103, bonding layer 2, first elastic strip 201, second elastic strip 202, adhesive protrusions 203, antibacterial powder granules 3, cavity 4, antibacterial protective layer 5, non-woven fabric layer 6, first TPU hot melt adhesive powder layer 7, second TPU hot melt adhesive powder layer 8. Detailed Implementation

[0018] The embodiments of this utility model will be described below with reference to the accompanying drawings and related examples. The embodiments of this utility model are not limited to the following examples, and this utility model relates to relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0019] like Figures 1 to 3 As shown, an antibacterial and skin-friendly elastic composite film includes a composite film body 1. The composite film body 1 includes a first elastic film layer 101 and a second elastic film layer 102, and a fiber mesh layer 103 sandwiched between the first elastic film layer 101 and the second elastic film layer 102. An adhesive layer 2 is provided on the end face of the second elastic film layer 102 facing away from the first elastic film layer 101, and an antibacterial protective layer 5 is provided on the end face of the first elastic film layer 101 facing away from the second elastic film layer 102.

[0020] In the technical solution of the composite film body 1 of this utility model, one end face of the composite film body 1 is combined with the non-woven fabric layer 6, and the side end face of the composite film body 1 combined with the non-woven fabric layer 6 is provided with the bonding layer 2. The melting point of the bonding layer 2 is lower than the melting point of the composite film body 1. The bonding layer 2 bonds the composite film body 1 and the non-woven fabric layer 6 during the hot pressing process.

[0021] It should be noted that the bonding layer 2 includes a first elastic strip 201 spaced apart along the length direction of the composite film body 1 and a second elastic strip 202 spaced apart along the width direction of the composite film body 1. The first elastic strip 201 and the second elastic strip 202 are stacked alternately to form a plurality of adhesive protrusions 203. The bonding layer 2 is filled with antibacterial powder particles 3.

[0022] Furthermore, in the above scheme, the composite film body 1 is laminated with a non-woven fabric layer 6 on one side corresponding to the bonding layer 2. The bonding layer 2 is hot-pressed to bond the composite film body 1 and the non-woven fabric layer 6. The second elastic film layer 102 is a TPU elastic film layer. The first elastic strip 201 and the second elastic strip 202 are polyolefin elastomers. The melting point of the first elastic strip 201 and the second elastic strip 202 is lower than that of the second elastic film layer 102. The bonding layer 2 has good transparency and low density, and a relatively soft feel. During the hot pressing process, it penetrates to one side of the non-woven fabric layer 6 without affecting the feel of the non-woven fabric layer 6.

[0023] Furthermore, in the above scheme, the adhesive protrusions 203 are formed by stacking the first elastic strip 201 and the second elastic strip 202 at their intersections. The adhesive protrusions 203 formed by stacking the first elastic strip 201 and the second elastic strip 202 at their intersections are circularly diffused under hot pressing, forming an array-like adhesive structure between the composite film body 1 and the non-woven fabric layer 6. This structure enhances the bonding strength between the composite film body 1 and the non-woven fabric layer 6. At the same time, since the adhesive protrusions 203 are circularly diffused under hot pressing, the adhesive structure is more evenly distributed between the composite film body 1 and the non-woven fabric layer 6, further improving the overall stability and durability of the composite film. In addition, the first elastic strip 201 and the second elastic strip 202 are stacked in an intersecting manner to form several cavities 4. The cavities 4 are filled with the antibacterial powder particles 3. The gaps in this array-like adhesive structure form a large number of cavities 4. Filling the cavities 4 with antibacterial powder particles 3 can effectively prevent moisture and bacteria from penetrating from the gaps in the composite film, enhancing the antibacterial and skin-friendly properties of the composite film.

[0024] In the technical solution of the composite film body 1 of this utility model, a fiber web layer 103 is sandwiched between the first elastic film layer 101 and the second elastic film layer 102. The fiber web layer 103 includes spandex fibers and PET fibers. The spandex fibers and PET fibers are arranged in the transverse and longitudinal directions and are hot-pressed together with the first elastic film layer 101 and the second elastic film layer 102, so that the composite film can better restore its original shape when subjected to external force and maintain the stability of its shape.

[0025] Furthermore, the transverse and longitudinal arrangement of the spandex fibers and PET fibers forms an interwoven network structure. During the hot-pressing composite process, this structure is tightly bonded to the first elastic film layer 101 and the second elastic film layer 102, further enhancing the overall strength and stability of the composite film.

[0026] Furthermore, in the above scheme, the single filament fineness of the spandex fiber is 15-30D. Using fine denier spandex fiber has a softer characteristic and reduces the hardening effect on the elastic membrane body. The single filament fineness of the PET fiber is 50-75D.

[0027] Furthermore, in the above scheme, a first TPU hot melt adhesive powder layer 7 is provided between the first elastic film layer 101 and the fiber mesh layer 103, and a second TPU hot melt adhesive powder layer 8 is provided between the second elastic film layer 102 and the fiber mesh layer 103. While ensuring elasticity, the low melting point PET fiber and TPU hot melt adhesive powder layer achieve self-adhesion with the composite film body 1, avoiding hardening problems caused by the use of additional adhesives.

[0028] Furthermore, in the above scheme, the antibacterial protective layer 5 includes an aqueous polyurethane coating and nano-silver particles, the nano-silver particles are sandwiched in the aqueous polyurethane coating, and the aqueous polyurethane coating is applied to the end face of the first elastic film layer 101.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An antibacterial, skin-friendly, elastic composite film, characterized in that, The composite membrane body (1) includes a first elastic membrane layer (101) and a second elastic membrane layer (102) and a fiber mesh layer (103) sandwiched between the first elastic membrane layer (101) and the second elastic membrane layer (102). The end face of the second elastic membrane layer (102) facing away from the first elastic membrane layer (101) is provided with an adhesive layer (2), and the end face of the first elastic membrane layer (101) facing away from the second elastic membrane layer (102) is provided with an antibacterial protective layer (5). The bonding layer (2) includes a first elastic strip (201) spaced apart along the length direction of the composite film body (1) and a second elastic strip (202) spaced apart along the width direction of the composite film body (1). The first elastic strip (201) and the second elastic strip (202) are stacked alternately to form a plurality of adhesive protrusions (203). The bonding layer (2) is filled with antibacterial powder particles (3).

2. The antibacterial, skin-friendly, elastic composite film according to claim 1, characterized in that, The first elastic strip (201) and the second elastic strip (202) are stacked at their intersections to form the adhesive protrusions (203). The first elastic strip (201) and the second elastic strip (202) are stacked at their intersections to form a plurality of cavities (4), and the cavities (4) are filled with the antibacterial powder particles (3).

3. The antibacterial, skin-friendly, elastic composite film according to claim 1, characterized in that, The composite film body (1) has a non-woven fabric layer (6) on one side corresponding to the bonding layer (2), and the bonding layer (2) is heat-pressed to bond the composite film body (1) and the non-woven fabric layer (6).

4. The antibacterial, skin-friendly, elastic composite film according to claim 1, characterized in that, The fiber web (103) includes spandex fibers and PET fibers, which are arranged in the transverse and longitudinal directions and are hot-pressed together with the first elastic film layer (101) and the second elastic film layer (102).

5. The antibacterial, skin-friendly, elastic composite film according to claim 4, characterized in that, The spandex fiber has a single filament fineness of 15-30D, and the PET fiber has a single filament fineness of 50-75D.

6. The antibacterial, skin-friendly, elastic composite film according to claim 1, characterized in that, A first TPU hot melt adhesive powder layer (7) is provided between the first elastic film layer (101) and the fiber mesh layer (103), and a second TPU hot melt adhesive powder layer (8) is provided between the second elastic film layer (102) and the fiber mesh layer (103).

7. The antibacterial, skin-friendly, elastic composite film according to claim 1, characterized in that, The antibacterial protective layer (5) includes an aqueous polyurethane coating and nano silver particles. The nano silver particles are sandwiched in the aqueous polyurethane coating, and the aqueous polyurethane coating is applied to the end face of the first elastic film layer (101).

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