A unidirectional moisture-conducting and antibacterial gauze and its production method

Abstract

The present invention relates to a unidirectional moisture-conducting and antibacterial gauze and a production method thereof, comprising the following steps: S1. Warp A is subjected to degreasing treatment to obtain warp B, warp B is subjected to antibacterial finishing to obtain warp C, and warp C is subjected to water-repellent finishing to obtain warp D; weft A is subjected to degreasing treatment to obtain weft B, and weft B is subjected to antibacterial finishing to obtain weft C; S2. Warp D and weft C are interwoven with each other to form a plain fabric, and through post-treatment, a unidirectional moisture-conducting and antibacterial gauze is obtained. After the warp of the present invention is subjected to water-repellent finishing and then interwoven with the weft to form gauze, the gauze has a certain unidirectional moisture-conducting property. When in use, while keeping the wound dry, the adhesion between the gauze and the wound is greatly reduced, and it is suitable for use under the condition of contacting with human wounds; and it has a certain porosity to ensure breathability; the warp and weft are first subjected to antibacterial finishing respectively and then woven, so that the gauze of the present invention can adsorb more antibacterial drugs, and thus has excellent antibacterial properties.

Description

Technical Field

[0001] The present invention belongs to the field of textile processing, and particularly relates to a unidirectional moisture-conducting and antibacterial gauze and a production method thereof. Background Art

[0002] After a human body is injured, non-woven fabric or cotton gauze is often used to wrap the wound. Non-woven fabric is generally made by laying cotton fibers; cotton gauze generally selects ring-spun cotton yarn with a relatively low twist coefficient as the warp and weft yarns, and they are interwoven with each other to form a plain woven fabric with a relatively sparse warp and weft density. Due to the need for the gauze to come into contact with the wound, the fabric is required to have a soft hand feeling and good moisture absorption performance. However, during the process of the fabric coming into contact with the wound, due to wound exudate, the liquid contaminates the fabric. After the fabric absorbs the liquid, it cannot be quickly dissipated, resulting in the wound being in contact with the liquid-stained fabric for a long time, and the dryness of the wound cannot be ensured. After a period of time, after the liquid is absorbed and dissipated by the fabric, the wound and the fabric stick together. When changing the dressing, separating the wound from the fabric often causes the wound to tear again. Especially for non-woven fabric, due to its loose structure, it is easy to be torn into dots and strips, making it difficult to clean and causing pain to the injured. These fabrics coming into contact with the wound must also have a certain antibacterial property. Usually, the whole fabric is subjected to antibacterial finishing. For example, for non-woven fabric, surface spraying method is used for antibacterial finishing. Since this antibacterial finishing is for the fabric surface and the finishing time is short, the antibacterial effect of non-woven fabric is not good; there is also an impregnation antibacterial finishing method for woven fabrics. However, due to the relatively large warp and weft density of woven fabrics and their certain dense structure, it is very difficult for antibacterial drugs to penetrate deep into the woven fabric or even the yarn interior, resulting in insufficient antibacterial effect of the woven fabric; there is also a situation where hospitals soak cotton gauze in antibacterial drugs and use the gauze soaked for a long time as a dressing on the wound when needed, and then wrap it with ordinary gauze on the outside. In case of emergency, such hospital conditions are often not available.

[0003] Therefore, according to the structural characteristics and special purposes of cotton gauze, it becomes a very meaningful work to develop and study a kind of cotton gauze with unidirectional moisture conductivity, non-stickiness, air permeability and strong antibacterial property in order to reduce the pain of the injured. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies, and provide a unidirectional moisture-conducting and antibacterial gauze and a production method thereof, so as to solve the technical problems of poor unidirectional moisture conductivity, non-stickiness, air permeability and antibacterial property of cotton gauze in the prior art.

[0005] To achieve the above technical purpose, the present invention provides a technical solution for a production method of a unidirectional moisture-conducting and antibacterial gauze:

[0006] It includes the following steps:

[0007] S1. The warp yarn A is degreased to obtain the warp yarn B, the warp yarn B is subjected to antibacterial finishing to obtain the warp yarn C, and the warp yarn C is subjected to water-repellent finishing to obtain the warp yarn D;

[0008] The weft yarn A is degreased to obtain the weft yarn B, and the weft yarn B is subjected to antibacterial finishing to obtain the weft yarn C;

[0009] S2. The warp yarn D and the weft yarn C are interwoven to form a plain fabric, and after post-treatment, a unidirectional moisture-conductive antibacterial gauze is obtained.

[0010] Furthermore, in step S1, for the degreasing treatment, the warp yarn A or the weft yarn A is made into a loose bobbin and then steam degreased.

[0011] Furthermore, in step S1, both the warp yarn A and the weft yarn A are rotor spun, with a linear density of 29 - 58.8 tex; the twist factor of the warp yarn A is 280 - 320, and the twist factor of the weft yarn A is 260 - 300.

[0012] Furthermore, in step S1, the antibacterial finishing processes for both the warp yarn B and the weft yarn B are impregnation finishing. In the impregnation finishing, the concentration of the antibacterial finishing agent is 30 - 50 g / L, the impregnation time is 20 - 30 min, and the impregnation temperature is 38 - 42 °C.

[0013] Furthermore, the antibacterial finishing agent is a chitosan antibacterial finishing agent.

[0014] Furthermore, in step S1, the water-repellent finishing process for the warp yarn C is: impregnation finishing with an organosilicon water-repellent finishing agent. Among them, the concentration of the organosilicon water-repellent finishing agent is 20 - 50 g / L, the impregnation time is 20 - 30 min, and the impregnation temperature is 38 - 42 °C.

[0015] Furthermore, in step S1, after the antibacterial finishing of the warp yarn B and the weft yarn B, they both go through the steps of washing, dehydration, and drying; after the water-repellent finishing of the warp yarn C, it goes through the steps of dehydration and drying; the drying temperature is 115 - 125 °C.

[0016] Furthermore, in step S2, the warp density and weft density of the unidirectional moisture-conductive antibacterial gauze are both 8 - 12 picks per centimeter.

[0017] Furthermore, in step S2, the post-treatment includes trimming and cutting.

[0018] The unidirectional moisture-conductive antibacterial gauze obtained by the above production method.

[0019] Compared with the prior art, the beneficial effects of the present invention include:

[0020] 1. The warp yarns after water-repellent finishing and the weft yarns after hydrophilic finishing are interwoven into gauze, enabling the gauze to have a certain one-way moisture conduction property. When in use, while keeping the wound dry, the adhesion between the gauze and the wound is greatly reduced, making it suitable for use in contact with human wounds.

[0021] 2. The warp yarns and weft yarns are interwoven into gauze, ensuring that the gauze has a certain porosity, so that the gauze of the present invention maintains good air permeability, which is beneficial to the recovery of the wound.

[0022] 3. The warp yarns and weft yarns are first subjected to antibacterial finishing separately and then woven, enabling the gauze of the present invention to adsorb more antibacterial drugs, and thus having excellent antibacterial properties.

[0023] 4. All the auxiliaries used in the present invention are environmentally friendly. Therefore, the prepared gauze has excellent biocompatibility and environmental protection properties. Specific Embodiments

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] The present invention provides a one-way moisture-conducting and antibacterial gauze and its production method, which includes the following steps.

[0026] (1) Make the warp yarns into loose bobbins; then subject the warp yarns after the loose bobbins to high-temperature steam degreasing treatment.

[0027] (2) Use an antibacterial finishing agent to carry out antibacterial finishing on the degreased warp yarns by the impregnation method, and then wash, dehydrate and dry the warp yarns after the antibacterial finishing.

[0028] (3) Use a water-repellent finishing agent to carry out water-repellent finishing on the warp yarns after the antibacterial finishing by the impregnation method, and then dehydrate and dry the warp yarns after the water-repellent finishing.

[0029] (4) Make the weft yarns into loose bobbins; then subject the weft yarns after the loose bobbins to high-temperature steam degreasing treatment.

[0030] (5) Use an antibacterial finishing agent to carry out antibacterial finishing on the degreased weft yarns by the impregnation method, and then wash, dehydrate and dry the weft yarns after the antibacterial finishing.

[0031] (6) The warp yarns are warped and drawn through the heddles, and on the loom, the warp yarns and weft yarns are interwoven into a plain woven fabric, which is trimmed and cut to obtain the one-way moisture-conducting and antibacterial gauze.

[0032] Preferably, both the warp yarns and weft yarns are rotor spun yarns, the linear density is 29 - 58.8 tex, and the twist coefficients of the warp yarns and weft yarns are 280 - 320 and 260 - 300 respectively.

[0033] Preferably, the warp water-repellent finishing process is as follows: finishing with an organosilicon water-repellent finishing agent, with a concentration of 20 to 50 g / L, an impregnation time of 20 to 30 min, and an impregnation temperature of 40 ± 2°C. The water-repellent finishing agent is preferably the AGLEX-311 organosilicon water-repellent finishing agent.

[0034] Preferably, the antibacterial finishing process is as follows: the dosage of the antibacterial finishing agent is 30 to 50 g / L, the impregnation time is 20 to 30 min, and the impregnation temperature is 40 ± 2°C.

[0035] Preferably, the antibacterial finishing agent is a chitosan antibacterial finishing agent, with the model being chitosan with CAS No. 9012-76-4.

[0036] Preferably, the drying temperature in (2) and (4) is 120 ± 5°C.

[0037] Preferably, the gauze fabric structure is a plain weave fabric, and the warp density and weft density of the gauze are 8 to 12 threads per centimeter. In the present invention, the warp density and weft density of the gauze cannot be too large, otherwise the fabric structure is too tight, and due to insufficient moisture absorption channels, the unidirectional moisture conduction effect will be poor. And adopting a plain weave structure can better ensure the stability of the fabric structure compared with satin or twill.

[0038] The main mechanism of the present invention: After the warp is subjected to water-repellent finishing and interwoven with the weft to form a gauze, the two sides of the fabric are the warp side (reverse side) and the weft side (front side) respectively, and the functions of the two sides are different. The warp side has more warp yarns and fewer weft yarns, mainly showing water repellency, and the weft side has more weft yarns and fewer warp yarns, mainly showing hydrophilicity. The two sides of the fabric have different properties, forming a unidirectional moisture conduction performance.

[0039] The following further elaborates on the present invention through specific examples.

[0040] To avoid repetition, the following examples all adopt the following process:

[0041] Loose bobbin process: Use a loose bobbin machine to make the warp and weft from cheese bobbins into loose bobbins, with a rotation speed of 1500 revolutions per minute and a yarn tension of 14 cN.

[0042] Warping process: Wind 5298 warp yarns parallelly onto the warp beam, and the process parameters are designed as follows: vehicle speed: 200 m / min, warping tension: 30 cN.

[0043] Sizing process: Use 2 heddles, and the number of side yarns: 24 threads × 2.

[0044] Weaving process: It is woven on an air-jet loom, and the main process parameters are: loom speed: 800 r / min, reed count: 30, width: 2100 mm, weft density on the loom: 8 - 12 picks / cm, back beam height: 10 mm, loom tension: 2500 cN, workshop temperature: 25 - 32 °C, relative humidity: 70 - 75%.

[0045] Example 1

[0046] A unidirectional moisture-conductive antibacterial gauze and its production method, comprising the following steps:

[0047] (1) The rotor yarn with a linear density of 29 tex and a twist factor of 320 is used as the warp yarn to make a loose bobbin, and then the warp yarn after the loose bobbin is subjected to high-temperature steam degreasing treatment;

[0048] (2) The degreased warp yarn is subjected to antibacterial finishing by the impregnation method with a chitosan antibacterial finishing agent. The antibacterial finishing process is: the dosage of the antibacterial finishing agent is 30 g / L, the impregnation time is 20 min, and the impregnation temperature is 40 ± 2 °C. Then the warp yarn after antibacterial finishing is washed, dehydrated, and dried at a drying temperature of 120 ± 5 °C;

[0049] (3) The antibacterial-finished warp yarn is subjected to water-repellent finishing by the impregnation method with a water-repellent finishing agent. The water-repellent finishing process is: using an organosilicon water-repellent finishing agent for finishing, 25 g / L, the impregnation time is 20 min, and the impregnation temperature is 40 ± 2 °C. Then the water-repellent-finished warp yarn is dehydrated and dried at a drying temperature of 120 ± 5 °C;

[0050] (4) The rotor yarn with a linear density of 29 tex and a twist factor of 300 is used as the weft yarn to make a loose bobbin; then the weft yarn after the loose bobbin is subjected to high-temperature steam degreasing treatment;

[0051] (5) The degreased weft yarn is subjected to antibacterial finishing by the impregnation method with a chitosan antibacterial finishing agent. The antibacterial finishing process is: the dosage of the antibacterial finishing agent is 30 g / L, the impregnation time is 20 min, and the impregnation temperature is 40 ± 2 °C. Then the weft yarn after antibacterial finishing is washed, dehydrated, and dried at a drying temperature of 120 ± 5 °C;

[0052] (6) The warp yarn is warped and drawn through the heddles. On the loom, according to a warp density and a weft density of 12 picks / cm, the warp yarn and the weft yarn are interwoven to form a plain woven fabric, which is trimmed and cut to obtain the unidirectional moisture-conductive antibacterial gauze.

[0053] Example 2 (reducing the warp density and weft density compared with Example 1)

[0054] A unidirectional moisture-conductive antibacterial gauze and its production method, comprising the following steps:

[0055] (1) The air-jet spun yarn with a linear density of 29 tex and a twist factor of 320 is used as the warp yarn to make a loose bobbin, and then the warp yarn after the loose bobbin is subjected to high-temperature steam degreasing treatment;

[0056] (2) The degreased warp yarn is subjected to antibacterial finishing by the impregnation method with a chitosan antibacterial finishing agent. The antibacterial finishing process is as follows: the dosage of the antibacterial finishing agent is 30 g / L, the impregnation time is 30 min, and the impregnation temperature is 40 ± 2 °C. Then the warp yarn after antibacterial finishing is washed, dehydrated, and dried at a drying temperature of 120 ± 5 °C;

[0057] (3) The warp yarn is subjected to water-repellent finishing by the impregnation method with a water-repellent finishing agent. The water-repellent finishing process is as follows: use a polyurethane-modified silicone water-repellent finishing agent for finishing, 25 g / L, the impregnation time is 30 min, and the impregnation temperature is 40 ± 2 °C. Then the warp yarn after water-repellent finishing is dehydrated and dried at a drying temperature of 120 ± 5 °C;

[0058] (4) The air-jet spun yarn with a linear density of 29 tex and a twist factor of 300 is used as the weft yarn to make a loose bobbin, and then the weft yarn after the loose bobbin is subjected to high-temperature steam degreasing treatment;

[0059] (5) The degreased weft yarn is subjected to antibacterial finishing by the impregnation method with a chitosan antibacterial finishing agent. The antibacterial finishing process is as follows: the dosage of the antibacterial finishing agent is 30 g / L, the impregnation time is 30 min, and the impregnation temperature is 40 ± 2 °C. Then the weft yarn after antibacterial finishing is washed, dehydrated, and dried at a drying temperature of 120 ± 5 °C;

[0060] (6) The warp yarn is warped and drawn through the heddles. On the loom, according to a warp density and a weft density of 8 per centimeter, the warp yarn and the weft yarn are interwoven to form a plain woven fabric, which is then trimmed and cut to obtain a unidirectional moisture-conductive antibacterial gauze.

[0061] Example 3

[0062] The difference between this example and Example 1 is that antibacterial finishing and water-repellent treatment are carried out on the warp yarn synchronously. The specific steps include:

[0063] (1) The air-jet spun yarn with a linear density of 29 tex and a twist factor of 320 is used as the warp yarn to make a loose bobbin, and then the warp yarn after the loose bobbin is subjected to high-temperature steam degreasing treatment;

[0064] (2) The degreased warp yarn is subjected to synchronous water-repellent and antibacterial finishing by the impregnation method with a chitosan antibacterial finishing agent. The finishing process is as follows: the dosage of the antibacterial finishing agent is 30 g / L, and the silicone water-repellent finishing agent is used for finishing, 25 g / L, the impregnation time is 20 min, and the impregnation temperature is 40 ± 2 °C. Then the warp yarn after antibacterial finishing is washed, dehydrated, and dried at a drying temperature of 120 ± 5 °C;

[0065] (3) The rotor spun yarn with a linear density of 29 tex and a twist coefficient of 300 is used as the weft yarn to make a loose bobbin; then the weft yarn after making the loose bobbin is subjected to high-temperature steam degreasing treatment;

[0066] (4) The degreased weft yarn is subjected to antibacterial finishing using a chitosan antibacterial finishing agent by the impregnation method. The antibacterial finishing process is as follows: the dosage of the antibacterial finishing agent is 30 g / L, the impregnation time is 20 min, and the impregnation temperature is 40 ± 2 °C. Then the weft yarn after antibacterial finishing is washed, dehydrated, and dried at a drying temperature of 120 ± 5 °C;

[0067] (5) The warp yarn is warped and drawn through the heddles. On the loom, the warp yarn and the weft yarn are interwoven with each other at a warp density and a weft density of 12 threads / cm to form a plain woven fabric, which is trimmed and cut to obtain the unidirectional moisture-conductive antibacterial gauze.

[0068] Example 4

[0069] The difference between this example and Example 1 is: increasing the concentration of the antibacterial finishing agent for antibacterial finishing and the concentration of the water-repellent treatment agent for water-repellent treatment. The specific steps include:

[0070] (1) The rotor spun yarn with a linear density of 29 tex and a twist coefficient of 320 is used as the warp yarn to make a loose bobbin, and then the warp yarn after making the loose bobbin is subjected to high-temperature steam degreasing treatment;

[0071] (2) The degreased warp yarn is subjected to antibacterial finishing using a chitosan antibacterial finishing agent by the impregnation method. The antibacterial finishing process is as follows: the dosage of the antibacterial finishing agent is 50 g / L, the impregnation time is 30 min, and the impregnation temperature is 40 ± 2 °C. Then the warp yarn after antibacterial finishing is washed, dehydrated, and dried at a drying temperature of 120 ± 5 °C;

[0072] (3) The warp yarn is subjected to water-repellent finishing using a water-repellent finishing agent by the impregnation method. The water-repellent finishing process is as follows: use a polyurethane-modified silicone water-repellent finishing agent for finishing, 40 g / L, the impregnation time is 30 min, and the impregnation temperature is 40 ± 2 °C. Then the warp yarn after water-repellent finishing is dehydrated and dried at a drying temperature of 120 ± 5 °C;

[0073] (4) The rotor spun yarn with a linear density of 29 tex and a twist coefficient of 300 is used as the warp yarn to make a loose bobbin, and then the warp yarn after making the loose bobbin is subjected to high-temperature steam degreasing treatment;

[0074] (5) The degreased weft yarn is subjected to antibacterial finishing using a chitosan antibacterial finishing agent by the impregnation method. The antibacterial finishing process is as follows: the dosage of the antibacterial finishing agent is 50 g / L, the impregnation time is 30 min, and the impregnation temperature is 40 ± 2 °C. Then the weft yarn after antibacterial finishing is washed, dehydrated, and dried at a drying temperature of 120 ± 5 °C;

[0075] (6) The warp yarns are warped and drawn through the heddles. On the loom, with a warp density and a weft density of 12 threads / cm, the warp yarns and the weft yarns are interwoven to form a plain woven fabric, which is then trimmed and cut to obtain the unidirectional moisture-conductive antibacterial gauze.

[0076] Comparative Example 1

[0077] The difference from Example 4 is that the dosage of the antibacterial finishing agent in step (2) is adjusted to 30 g / L, and it is found that the antibacterial performance is lower than that of Example 4.

[0078] Comparative Example 2

[0079] The difference from Example 1 is that the water-repellent finishing is removed to obtain the antibacterial gauze. This gauze loses the function of unidirectional moisture conduction after removing the water-repellent finishing of the warp yarns.

[0080] Test Example

[0081] Tested according to the standard of GB-T 21655.1-2008: The moisture absorption and quick-drying properties of the gauzes prepared in Examples 1 to 4 were tested, and the time required for the water droplets to contact the cloth sample and completely diffuse and penetrate into the fabric was measured by the water droplet diffusion time. The experimental data are shown in Table 1 below.

[0082] Table 1 Test data of water droplet diffusion time

[0083]

[0084] The bacteriostatic rates of Examples 1 to 4 against Escherichia coli, Staphylococcus aureus, and Candida albicans at 20 min were detected according to GB15979, and the test data are shown in Table 2 below.

[0085] Table 2 Antibacterial test data

[0086] Test Items Example 1 Example 2 Example 3 Example 4 Escherichia coli (%) 93.1 93.4 91.1 94.6 Staphylococcus aureus (%) 92.1 92.7 91.1 94.1 Candida albicans (%) 92.4 92.6 91.3 93.9

[0087] It can be seen from the comparison of the above experimental data that when other conditions are certain, the lower the warp density and the weft density, the better the antibacterial and water-repellent effects; the antibacterial effect of antibacterial first and then water-repellent finishing is better than that of simultaneous antibacterial and water-repellent finishing, and the change in the water-repellent effect is not significant; as the dosage of the water-repellent agent and the antibacterial finishing agent increases, the antibacterial effect improves, and the change in the water-repellent effect is not significant. To ensure the antibacterial effect, the dosage of the antibacterial finishing agent must be greater than that of the water-repellent finishing agent.

[0088] The gauze prepared by the present invention has excellent unidirectionality and antibacterial property. The gauze of the present invention can be used for emergency wound treatment. When in use, while keeping the wound dry, it greatly reduces the adhesion between the gauze and the wound and is suitable for use in contact with human wounds; it can also be further applied as a medical bandage or dressing as a special medical product for treating wounds.

[0089] The specific embodiments of the present invention described above do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A production method of a unidirectional moisture-conducting and antibacterial gauze, characterized in that, It includes the following steps: The warp A is degreased to obtain the warp B, the warp B is subjected to antibacterial finishing to obtain the warp C, and the warp C is subjected to water-repellent finishing to obtain the warp D; The weft A is degreased to obtain the weft B, and the weft B is subjected to antibacterial finishing to obtain the weft C; The antibacterial finishing processes of the warp B and the weft B are both impregnation finishing. In the impregnation finishing, the concentration of the antibacterial finishing agent is 50 g / L, the impregnation time is 20 - 30 min, and the impregnation temperature is 38 - 42 °C; The water-repellent finishing process of the warp C is: impregnation finishing with an organosilicon water-repellent finishing agent. Among them, the concentration of the organosilicon water-repellent finishing agent is 40 g / L, the impregnation time is 20 - 30 min, and the impregnation temperature is 38 - 42 °C; The degreasing treatment is to make the warp A or the weft A into a loose bobbin and then carry out steam degreasing; The antibacterial finishing agent is a chitosan antibacterial finishing agent; S2. The warp D and the weft C are interwoven with each other to form a plain fabric, and a unidirectional moisture-conductive antibacterial gauze is obtained after post-treatment.

2. The production method of the unidirectional moisture-conducting antibacterial gauze according to claim 1, characterized in that, In step S1, both the warp A and the weft A are rotor spun, and the linear density is 29 - 58.8 tex; the twist factor of the warp A is 280 - 320, and the twist factor of the weft A is 260 - 300.

3. The production method of the unidirectional moisture-conducting and antibacterial gauze according to claim 1, characterized in that, In step S1, after the antibacterial finishing of the warp B and the weft B, they both go through the steps of washing, dehydration, and drying; after the water-repellent finishing of the warp C, it goes through the steps of dehydration and drying; the drying temperature is 115 - 125 °C.

4. The production method of the unidirectional moisture-conducting and antibacterial gauze according to claim 1, characterized in that, In step S2, the warp density and the weft density of the unidirectional moisture-conductive antibacterial gauze are both 8 - 12 threads / cm.

5. The production method of the unidirectional moisture-conducting antibacterial gauze according to claim 1, characterized in that, In step S2, the post-treatment includes trimming and cutting.

6. The unidirectional moisture-conductive antibacterial gauze obtained by the production method according to any one of claims 1 - 5.

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