Non-woven fabric for sterilizing medical apparatus and instruments

Abstract

The utility model discloses a non-woven fabric for sterilization of medical instruments, and relates to the technical field of non-woven fabrics, the non-woven fabric comprises a non-woven fabric body and a color developing unit; each color developing unit comprises a protective layer and a microcapsule layer, each microcapsule layer comprises a plurality of microcapsules, each microcapsule comprises a capsule shell and a pigment wrapped in the capsule shell, the protective layer wraps the exterior of the microcapsule layer, and the color developing units are arranged on the outer side face of the non-woven fabric body; wherein the protective layer is used for covering the color of the pigment. When the non-woven fabric is damaged, the protective layer at the damaged part is also damaged, the microcapsule layer is exposed, and the impact force causing the damage of the protective layer also causes the damage of the microcapsule, the outflow of the internal pigment and the color display, so that the damage warning function of the non-woven fabric is realized, the sterilized medical equipment is effectively prevented from being polluted, and the use risk of a patient is reduced.

Description

Technical Field

[0001] This application relates to the field of nonwoven fabric technology, and in particular to a nonwoven fabric for sterilizing medical devices. Background Technology

[0002] Medical nonwoven fabric, also known as medical nonwoven cloth, is a type of fabric that can be formed without traditional weaving or knitting processes. It is a new type of fiber product with a soft, breathable, and planar structure, formed directly from polymer chips, short fibers, or filaments through various web forming methods and bonding techniques.

[0003] Reusable medical devices in medical facilities require sterilization after each use. Non-woven fabric is a commonly used sterilization packaging material for pressure steam sterilization of medical devices, used to package the devices to be sterilized. Non-woven fabric is breathable, allowing sterilizing gases to permeate into the package and sterilize the medical devices. After sterilization, it acts as a sterile barrier, isolating the devices from external microorganisms and preventing contamination during transport. However, non-woven fabric is prone to damage during use, sometimes undetectable, which can easily lead to contamination of the sterilized medical devices, increasing the risk to patients.

[0004] Therefore, how to achieve the damage warning function of nonwoven fabric is a problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this application is to provide a nonwoven fabric for sterilizing medical devices, which solves the problem that existing nonwoven fabrics are prone to damage during use. Such damage is sometimes difficult to detect and can easily cause contamination of sterilized medical devices, increasing the risk of use for patients.

[0006] To solve the above-mentioned technical problems, this application provides a nonwoven fabric for sterilizing medical devices, comprising: a nonwoven fabric body and a color-developing unit;

[0007] The color-developing unit includes a protective layer and a microcapsule layer. The microcapsule layer includes multiple microcapsules, each microcapsule including a capsule shell and a pigment encapsulated within the capsule shell. The protective layer covers the outside of the microcapsule layer, and the multiple color-developing units are disposed on the outer surface of the nonwoven fabric body. The protective layer is used to cover the color of the pigment.

[0008] Optionally, it also includes an antibacterial unit, a plurality of said antibacterial units being disposed on the inner side of the nonwoven fabric body, said antibacterial unit including a sealing layer and an antibacterial layer, said sealing layer being wrapped around the outside of said antibacterial layer, said antibacterial layer being provided with volatile substances for antibacterial purposes.

[0009] Optionally, a plurality of color-developing units are evenly distributed in a dot-like pattern on the outer surface of the nonwoven fabric body, and a plurality of antibacterial units are evenly distributed in a dot-like pattern on the inner surface of the nonwoven fabric body.

[0010] Optionally, the color-developing unit and the antibacterial unit are respectively arranged on both sides of the nonwoven fabric body.

[0011] Optionally, the diameter of the microcapsule layer is 1mm-4mm, the thickness of the microcapsule layer is 5um-20um, the diameter of the protective layer is 2mm-5mm, and the thickness of the protective layer is 50um-100um.

[0012] Optionally, the spacing between two adjacent colorimetric units and the spacing between two adjacent antibacterial units are both 5mm-20mm.

[0013] Optionally, the diameter of the antibacterial layer is 2mm-8mm, the thickness of the antibacterial layer is 10um-30um, the diameter of the sealing layer is 5mm-10mm, and the thickness of the sealing layer is 20um-50um.

[0014] Optionally, the edge of the nonwoven fabric body is provided with a pressure-sensitive adhesive strip and a release paper adhered to the pressure-sensitive adhesive strip.

[0015] This application provides a nonwoven fabric for sterilizing medical devices, comprising: a nonwoven fabric body and a color-developing unit; the color-developing unit includes a protective layer and a microcapsule layer, the microcapsule layer including multiple microcapsules, each microcapsule including a capsule shell and pigment encapsulated within the capsule shell, the protective layer surrounding the microcapsule layer, and multiple color-developing units disposed on the outer surface of the nonwoven fabric body; wherein, the protective layer is used to cover the color of the pigment. When the nonwoven fabric is damaged, the protective layer at the damaged area will also be damaged, exposing the microcapsule layer. The impact force causing the damage to the protective layer will also cause the microcapsules to rupture, releasing the internal pigment and displaying the color, thereby achieving the damage warning function of the nonwoven fabric, effectively preventing contamination of sterilized medical devices and reducing the risk of use by patients. Furthermore, the degree of damage to the nonwoven fabric can be determined based on the depth and area of ​​the pigment color development on the nonwoven fabric. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A cross-sectional view of a nonwoven fabric for sterilizing medical devices provided in an embodiment of this application;

[0018] Figure 2 A top view of a nonwoven fabric for sterilizing medical devices provided in an embodiment of this application;

[0019] The attached diagram is labeled as follows: 1-Nonwoven fabric body, 2-Color developing unit, 3-Antibacterial unit, 201-Protective layer, 202-Microcapsule layer, 301-Sealing layer, 302-Antibacterial layer. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0021] The core of this application is to provide a nonwoven fabric for sterilizing medical devices, which enables a damage warning function for the nonwoven fabric.

[0022] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 A cross-sectional view of a nonwoven fabric for sterilizing medical devices provided in this application embodiment, as shown below. Figure 1 As shown, a nonwoven fabric for sterilizing medical devices includes: a nonwoven fabric body 1 and a color-developing unit 2; the color-developing unit 2 includes a protective layer 201 and a microcapsule layer 202, the microcapsule layer 202 includes a plurality of microcapsules, each microcapsule including a capsule shell and a pigment encapsulated within the capsule shell, the protective layer 201 is wrapped around the outside of the microcapsule layer 202, and the plurality of color-developing units 2 are disposed on the outer surface of the nonwoven fabric body 1; wherein, the protective layer 201 is used to cover the color of the pigment.

[0024] The protective layer 201 serves to cover the pigment color within the microcapsule layer 202. Typically, the color and strength of the protective layer 201 are similar to the nonwoven fabric, ensuring that even minor damage to the nonwoven fabric that does not affect its function will not damage the protective layer 201, thus preventing the microcapsule layer 202 from displaying its color. However, when the nonwoven fabric is damaged, the protective layer 201 at the damaged area will also be damaged, exposing the microcapsule layer 202. The impact that damages the protective layer 201 can also cause the microcapsules to rupture, releasing the pigment and displaying its color. The more severe the damage to the nonwoven fabric, the more microcapsules will rupture, resulting in a deeper pigment color on the fabric. This allows users to quickly identify damaged nonwoven fabric, assess the extent of damage, and thus reduce the risk of contamination of medical devices encased in nonwoven fabric.

[0025] The main components of the protective layer 201 are adhesive and pigment. The adhesive can be either hot melt adhesive or UV adhesive. Pigments such as indigo blue, ferrous oxide red, or ferrous oxide green are mixed according to the color of the nonwoven fabric to make the color of the protective layer 201 close to the color of the nonwoven fabric body 1. The capsule shell of the microcapsule is any one or a combination of polyvinyl alcohol, polyvinylpyrrolidone, and cellulose acetate. The core material encapsulated inside the capsule shell is pigment. The color of the pigment is selected to be distinctly different from the color of the nonwoven fabric and can be one of toluidine red, copper phthalocyanine, and benzidine yellow, allowing users to quickly identify damaged or discolored areas.

[0026] To ensure the breathability of the nonwoven fabric, the color development unit 2 is dot-coated on the surface of the nonwoven fabric rather than covering the entire surface, leaving uncovered areas to maintain breathability and allow sterilizing gas to enter the package and sterilize the internal medical device. The specifications of the microcapsule layer 202 and the protective layer 201 are not limited in this embodiment. Specifically, the diameter of the microcapsule layer 202 is 1mm-4mm, and its thickness is 5um-20um. The diameter of the protective layer 201 is 2mm-5mm, and its thickness is 50um-100um. The strength of the protective layer 201 can be adjusted to be close to that of the nonwoven fabric body 1.

[0027] This application provides a nonwoven fabric for sterilizing medical devices, comprising: a nonwoven fabric body 1 and a color-developing unit 2; the color-developing unit 2 includes a protective layer 201 and a microcapsule layer 202, the microcapsule layer 202 including multiple microcapsules, each microcapsule including a capsule shell and pigment encapsulated within the capsule shell, the protective layer 201 surrounding the microcapsule layer 202, and multiple color-developing units 2 disposed on the outer surface of the nonwoven fabric body 1; wherein, the protective layer 201 is used to cover the color of the pigment. When the nonwoven fabric is damaged, the protective layer 201 at the damaged area will also be damaged, exposing the microcapsule layer 202. The impact force causing the damage to the protective layer 201 will also cause the microcapsules to rupture, the internal pigment to flow out, and the color to be displayed, thereby realizing the damage warning function of the nonwoven fabric, effectively preventing the sterilized medical device from being contaminated, and reducing the risk of use by patients. In addition, the degree of damage to the nonwoven fabric can be determined according to the depth and area of ​​the pigment color development on the nonwoven fabric.

[0028] Based on the above embodiments, this application embodiment also includes an antibacterial unit 3. Multiple antibacterial units 3 are disposed on the inner side of the nonwoven fabric body 1. The antibacterial unit 3 includes a sealing layer 301 and an antibacterial layer 302. The sealing layer 301 wraps around the outside of the antibacterial layer 302. The antibacterial layer 302 is provided with volatile substances for antibacterial purposes.

[0029] The antibacterial unit is dot-coated on the surface of the nonwoven fabric. When the nonwoven fabric is damaged, the impact will break the corresponding sealing layer 301 at the damaged area, exposing the internal antibacterial layer 302. The volatile antibacterial components on the antibacterial layer 302 will be released onto the surface of the medical device, inhibiting bacterial growth on the device surface after the nonwoven fabric is damaged, reducing the risk of microbial contamination. After the medical device is sterilized by pressurized steam, the sealing layer 301 will be completely destroyed, exposing the antibacterial layer 302, and all the antibacterial components on the nonwoven fabric will be released, providing better protection for the medical device.

[0030] This application does not limit the specifications of the antibacterial layer 302 and the sealing layer 301. Specifically, the antibacterial layer 302 has a diameter of 2mm-8mm and a thickness of 10um-30um. The material is a mixture of silver ion antibacterial agent and essential oil-based antibacterial substances (such as oregano oil and tea tree oil). The essential oil-based antibacterial substances are volatile and can be released onto the device surface to exert an antibacterial effect. The silver ion antibacterial agent can inhibit the growth of bacteria on the surface of the nonwoven fabric and the surface of the device in contact with it, thereby better protecting the internal medical device. The sealing layer 301 is made of polyvinyl alcohol, has a diameter of 5mm-10mm, and a thickness of 20um-50um. Its main function is to reduce the volatilization of the essential oil-based antibacterial substances in the antibacterial layer 302 before the nonwoven fabric is used, and to release the antibacterial effect when the nonwoven fabric is damaged or after pressure steam sterilization, thus achieving the purpose of exerting an antibacterial effect according to the needs of use. Polyvinyl alcohol (PVA) was chosen because it has good barrier properties, effectively sealing the antibacterial agent and reducing its volatilization. The sealing layer 301 can be made of PVA, grade 1799, which is water-soluble but not at room temperature (water-soluble temperature is 95℃). Medical devices are typically sterilized by pressure steam at 121℃ or 134℃. Under these sterilization conditions, sealing layer 301 can completely dissolve, allowing the antibacterial layer 302 to leak out, causing the antibacterial substance to volatilize and better maintaining the sterility of the internal medical device.

[0031] Based on the above embodiments, Figure 2 A top view of a nonwoven fabric for sterilizing medical devices provided in an embodiment of this application, as shown below. Figure 1 and Figure 2 As shown, in this embodiment of the application, multiple color-developing units 2 are evenly distributed in a dot-like pattern on the outer surface of the nonwoven fabric body 1, and multiple antibacterial units 3 are evenly distributed in a dot-like pattern on the inner surface of the nonwoven fabric body 1. The color-developing units 2 and antibacterial units 3 are evenly distributed on the surface of the nonwoven fabric body 1, which can minimize the possibility of the nonwoven fabric body 1 being damaged without the color-developing units 2 and antibacterial units 3.

[0032] Furthermore, the color-developing unit 2 and the antibacterial unit 3 are respectively arranged on both sides of the nonwoven fabric body 1. For example... Figure 1As shown, an antibacterial unit 3 is positioned opposite the location of the color-developing unit 2. This arrangement aims to create an uncovered area on the non-woven fabric surface, ensuring its breathability and allowing sterilizing gas to penetrate the package. The spacing between adjacent color-developing units 2 and adjacent antibacterial units 3 is 5mm-20mm.

[0033] Based on the above embodiments, the edge of the nonwoven fabric body 1 in this application embodiment is provided with a pressure-sensitive adhesive strip and a release paper adhered to the pressure-sensitive adhesive strip. When packaging medical devices for sterilization, the release paper can be torn open, and the pressure-sensitive adhesive strip can be used for adhesion and fixation during the packaging process.

[0034] This application provides an antibacterial nonwoven fabric with a color-changing warning function for damage detection in medical device sterilization. During sterilization, the damaged area of ​​the nonwoven fabric changes color and releases antibacterial components, helping medical personnel quickly identify damaged fabric and reducing the risk of medical device contamination due to fabric damage. Furthermore, after pressure steam sterilization, all antibacterial components on the nonwoven fabric are released, providing better protection for the internal medical devices. The manufacturing process and usage of this nonwoven fabric are described below.

[0035] Manufacturing Process: First, microcapsules with a color distinct from the nonwoven fabric itself are prepared using a phase separation method to ensure a warning effect. Then, the prepared microcapsules are screen-printed onto the nonwoven fabric to obtain a microcapsule layer 202. After the microcapsule layer 202 cures, hot melt adhesive or UV adhesive mixed with pigment is applied to the microcapsule layer 202 using a dispensing machine. After the adhesive cures, a protective layer 201 is obtained. A prepared polyvinyl alcohol solution is screen-printed onto the surface of the nonwoven fabric to form the bottom of the sealing layer 301. Then, an antibacterial solution is screen-printed onto the bottom of the sealing layer 301 to form an antibacterial layer 302. Finally, a polyvinyl alcohol solution is applied to the surface of the antibacterial layer 302 using a dispensing machine to form the upper layer of the sealing layer 301, thus sealing the antibacterial layer 302. This process produces an antibacterial nonwoven fabric with a damage-changing color warning function.

[0036] The usage method is as follows: The non-woven fabric is shipped in sheet form. Pack the instrument with the side of the non-woven fabric containing the antibacterial unit 3. During packaging, the release paper on the pressure-sensitive adhesive strip can be peeled off. Use the adhesive side of the pressure-sensitive adhesive strip to secure the non-woven fabric during packaging, preventing it from unraveling. Then, place the packaged instrument in a sterilizer for sterilization. After successful sterilization, check the surface of the non-woven fabric package for damage or discoloration. If everything is in order, place the package on a transport cart and deliver it to the operating room. When using the instrument in the operating room, unpack the non-woven fabric package and remove the instrument.

[0037] During the sterilization process, damaged areas of the nonwoven fabric will show color, serving as a warning of damage. By sealing the antibacterial layer, the loss of antibacterial components before use is reduced. When the nonwoven fabric is damaged, the functional antibacterial agent is partially released, protecting the internal medical device. At the same time, after pressurized steam, all the sealing layers of the antibacterial layer are dissolved by the high-temperature steam (polyvinyl alcohol is water-soluble), the antibacterial layer leaks out, and all antibacterial substances are released, thereby maximizing the protective effect of the antibacterial layer on the medical device.

[0038] The foregoing has provided a detailed description of a nonwoven fabric for sterilizing medical devices provided in this application. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0039] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A nonwoven fabric for sterilizing medical devices, characterized in that, include: Nonwoven fabric body (1) and color rendering unit (2); The color-developing unit (2) includes a protective layer (201) and a microcapsule layer (202). The microcapsule layer (202) includes a plurality of microcapsules. Each microcapsule includes a capsule shell and a pigment encapsulated within the capsule shell. The protective layer (201) is wrapped around the outside of the microcapsule layer (202). The plurality of color-developing units (2) are disposed on the outer surface of the nonwoven fabric body (1). The protective layer (201) is used to cover the color of the pigment.

2. The nonwoven fabric for sterilizing medical devices according to claim 1, characterized in that, It also includes an antibacterial unit (3), a plurality of the antibacterial units (3) are disposed on the inner side of the nonwoven body (1), the antibacterial unit (3) includes a sealing layer (301) and an antibacterial layer (302), the sealing layer (301) wraps around the outside of the antibacterial layer (302), and the antibacterial layer (302) is provided with volatile substances for antibacterial purposes.

3. The nonwoven fabric for sterilizing medical devices according to claim 2, characterized in that, Multiple color-developing units (2) are evenly distributed in a dotted pattern on the outer surface of the nonwoven fabric body (1), and multiple antibacterial units (3) are evenly distributed in a dotted pattern on the inner surface of the nonwoven fabric body (1).

4. The nonwoven fabric for sterilizing medical devices according to claim 3, characterized in that, The color-developing unit (2) and the antibacterial unit (3) are respectively arranged on both sides of the nonwoven fabric body (1).

5. The nonwoven fabric for sterilizing medical devices according to claim 3, characterized in that, The diameter of the microcapsule layer (202) is 1mm-4mm, the thickness of the microcapsule layer (202) is 5um-20um, the diameter of the protective layer (201) is 2mm-5mm, and the thickness of the protective layer (201) is 50um-100um.

6. The nonwoven fabric for sterilizing medical devices according to claim 4, characterized in that, The spacing between two adjacent color development units (2) and the spacing between two adjacent antibacterial units (3) are both 5mm-20mm.

7. The nonwoven fabric for sterilizing medical devices according to claim 3, characterized in that, The antibacterial layer (302) has a diameter of 2mm-8mm and a thickness of 10um-30um. The sealing layer (301) has a diameter of 5mm-10mm and a thickness of 20um-50um.

8. The nonwoven fabric for sterilizing medical devices according to claim 1, characterized in that, The edge of the nonwoven fabric body (1) is provided with a pressure-sensitive adhesive strip and a release paper that is attached to the pressure-sensitive adhesive strip.

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