Antibacterial and antiviral skin-core composite wig fiber and preparation method thereof

Abstract

The present invention provides an antibacterial and antiviral skin-core composite wig fiber and a preparation method thereof, and relates to the technical field of simulated wigs. The wig fiber adopts a skin-core structure, wherein the skin layer is composed of PP, titanium dioxide and polylysine photosensitive molecules, and the core layer is composed of PCT and plant essential oil microcapsule powder. Titanium dioxide and polylysine photosensitive molecules absorb sunlight to inhibit and eliminate bacteria and viruses, and are added to PP and used as the skin layer to achieve the first step of antibacterial and antiviral effects. The present invention selects a composite essential oil composed of Elsholtzia ciliata essential oil, Hypericum perforatum essential oil, Nepeta tenuifolia essential oil, and Asoko fruit essential oil, and prepares it into microcapsule powder, which can achieve sustained release of essential oils, prolong the action time of essential oils, and mix with PCT as the core layer, significantly increasing the antibacterial and antiviral properties of the wig fiber.

Description

Technical Field

[0001] The invention relates to the technical field of simulated wigs, and in particular to an antibacterial and antiviral skin-core composite wig fiber and a preparation method thereof. Background Art

[0002] In recent years, with the improvement of people's living standards and changes in lifestyles, the use rate of wigs in the lives of the public has increased day by day. At the same time, due to the influence of culture and climate, the demand for wigs in African countries has always been at a high level. At present, most of the wig fibers on the market are mainly synthetic materials, and the commonly used raw material base materials are polypropylene, polyamide, polyvinyl chloride, polyester, etc. In the process of wearing and using wigs, due to direct or indirect contact with the human body and secreted sweat, rainwater, etc., bacteria are easily bred, and there are also many popular viruses in the current environment, but the above-mentioned synthetic base materials do not have the ability to resist bacteria and viruses. Therefore, for the consideration of human health, the antibacterial and antiviral properties of wig fibers should be taken seriously.

[0003] Antibacterial synthetic fibers are a type of synthetic fibers that can kill or inhibit the growth and reproduction of bacteria and fungi; antiviral synthetic fibers are synthetic fibers that can block the invasion of viruses, inhibit the growth and reproduction of viruses, and inhibit the activity of viruses. At present, the fiber antibacterial and antiviral agents used on the market mainly include metal ion inorganic antibacterial and antiviral agents and other organic antibacterial and antiviral agents. Among them, the metal ions in metal ion antibacterial and antiviral agents have the risk of accumulation in the human body, and the residues of organic antibacterial and antiviral agents may have many adverse effects on the human body. Abroad, metal ion antibacterial and antiviral agents such as silver and some other harmful antibacterial agents have long been banned from use in the European and American markets. Therefore, the development of a non-toxic, harmless, healthy, environmentally friendly, and long-lasting antibacterial and antiviral wig fiber has become a hot topic in the market. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides an antibacterial and antiviral sheath-core composite wig fiber and a preparation method thereof, wherein the wig fiber has excellent antibacterial and antiviral properties.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The invention discloses an antibacterial and antiviral sheath-core composite wig fiber, comprising a sheath layer and a core layer, wherein the core layer contains PCT and plant essential oil microcapsule powder; and the sheath layer contains PP, titanium dioxide and polylysine photosensitive molecules.

[0009] Furthermore, the wig fiber is made of the following raw materials in parts by weight: 80-120 parts of PCT, 15-30 parts of plant essential oil microcapsule powder, 100-140 parts of PP, 10-30 parts of titanium dioxide, 5-20 parts of polylysine photosensitive molecules, 4-8 parts of additives, 2-4 parts of dispersants, and 1-2 parts of plasticizers.

[0010] Furthermore, the plant essential oil microcapsule powder contains Elsholtzia ciliata essential oil, Hypericum perforatum essential oil, Nepeta tenuifolia essential oil and Ashoka fruit essential oil in a weight ratio of 1-2:1-2:1-2:1-2.

[0011] Furthermore, the plant essential oil microcapsule powder contains Elsholtzia ciliata essential oil, Hypericum perforatum essential oil, Nepeta tenuifolia essential oil and Ashoka fruit essential oil in a weight ratio of 1:2:2:1.

[0012] Furthermore, the plant essential oil microcapsule powder is prepared according to the following steps:

[0013] (1) mixing Elsholtzia ciliata essential oil, Hypericum perforatum essential oil, Nepeta tenuifolia essential oil, and Ashoka fruit essential oil in a weight ratio of 1-2:1-2:1-2:1-2 to obtain a compound essential oil, which is used as a core material for standby use;

[0014] (2) preparing gelatin and gum arabic solutions with a mass fraction of 2% respectively in a 50° C. water bath, and then mixing the gelatin and gum arabic solutions in equal volumes for use as wall materials;

[0015] (3) The core material obtained in step (1) and the wall material obtained in step (2) are mixed in a mass ratio of 1:2, and the mixture is emulsified at high speed for 3 minutes using an emulsifying homogenizer. Subsequently, the mixture is stirred and mixed at 600 r / min using a mechanical stirrer under heating at 40° C. in a water bath, and the pH value is adjusted to 3.7-4.0 using 10% acetic acid. After stirring for 30 minutes, the temperature is lowered to below 10° C., and the pH value is adjusted to 6.0 using 10% sodium bicarbonate. Subsequently, a curing agent is added for curing, and the curing time is 6-8 hours. Finally, the mixed solution is filtered, washed, centrifuged, and dried to obtain the plant essential oil microcapsule powder.

[0016] Furthermore, the additive is one or more of nano calcium carbonate, silicon dioxide, talc, silicon powder, titanium dioxide, and glass beads; the dispersant is vinyl bisstearamide or polyethylene wax with a molecular weight of 2600-3000; and the plasticizer is acetyl tributyl citrate.

[0017] A method for preparing an antibacterial and antiviral skin-core composite wig fiber is prepared according to the following steps:

[0018] (1) preparing a core layer substrate: weighing 80-120 parts of PCT and 15-30 parts of plant essential oil microcapsule powder by weight, then blending them, and extruding and granulating them using a twin-screw extruder to obtain a core layer masterbatch at a processing temperature of 100-120° C.;

[0019] (2) Preparing a skin layer substrate: Weigh 100-140 parts of PP, 10-30 parts of titanium dioxide, and 5-20 parts of polylysine photosensitive molecules by weight, then blend them, and extrude and granulate them using a twin-screw extruder to obtain a skin layer masterbatch at a processing temperature of 180-200° C.;

[0020] (3) drying the obtained core layer substrate and skin layer substrate in a vacuum drying oven at 100-120° C. for 6-8 hours; the moisture content after drying is below 50 ppm;

[0021] (4) Weigh 4-8 parts of additives, 2-4 parts of dispersants, and 1-2 parts of plasticizers by weight, mix them with the dried core material substrate and leather material substrate, and then add them to a twin-screw extruder for melt extrusion, cooling and shaping, oiling, stretching, cooling and winding spinning, wherein the melt temperature is 240-280°C and the screw speed is 350-500r / min.

[0022] (III) Beneficial effects

[0023] The present invention provides an antibacterial and antiviral skin-core composite wig fiber and a preparation method thereof. The wig fiber adopts a skin-core structure, and the present invention performs different antibacterial and antiviral modifications on the skin layer and the core layer, wherein the skin layer is composed of PP, titanium dioxide and polylysine photosensitive molecules, and the core layer is composed of PCT and plant essential oil microcapsule powder. Titanium dioxide and polylysine photosensitive molecules absorb sunlight to inhibit and eliminate bacteria and viruses, and adding them to PP and serving as the skin layer can achieve the first step of antibacterial and antiviral effects. Plant essential oil is a complex, biodegradable, volatile lipophilic mixture with multiple biological activities, mainly including terpenes, polyphenols, terpenes, quinones, flavonoids, aldehydes, fatty acids, etc. Many studies have reported that plant essential oils have excellent in vitro antibacterial, antibacterial and antiviral effects. However, the stability of essential oils is poor, and they are easy to volatilize at room temperature, resulting in a decrease in their utilization rate. Therefore, the present invention selects a composite essential oil composed of Elsholtzia ciliata essential oil, Hypericum perforatum essential oil, Nepeta tenuifolia essential oil, and Ashoka fruit essential oil, and prepares it into microcapsule powder, which can achieve sustained release of essential oils, prolong the action time of essential oils, and mix with PCT as a core layer, significantly increasing the antibacterial and antiviral properties of wig fibers, and achieving long-lasting and lasting antibacterial and antiviral effects. The polylysine and plant essential oils selected by the present invention are natural antibacterial and antiviral active ingredients, which are harmless to the human body and are healthy and environmentally friendly. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example 1

[0026] A method for preparing an antibacterial and antiviral skin-core composite wig fiber is prepared according to the following steps:

[0027] (1) Preparing a core material substrate: weighing 80 parts of PCT and 15 parts of plant essential oil microcapsule powder by weight, then blending them, and extruding and granulating them using a twin-screw extruder to obtain a core material masterbatch at a processing temperature of 100-120° C.;

[0028] (2) Preparation of leather material substrate: 100 parts of PP, 10 parts of titanium dioxide, and 20 parts of polylysine photosensitive molecules are weighed by weight, and then mixed, and extruded and granulated by a twin-screw extruder to obtain leather material masterbatch, and the processing temperature is 180-200° C.;

[0029] (3) drying the obtained core material substrate and skin material substrate in a vacuum drying oven at 100-120° C. for 6-8 hours; the moisture content after drying is below 50 ppm;

[0030] (4) Weigh 4 parts of additives, 2 parts of dispersants, and 1 part of plasticizer by weight, mix them with the dried core material substrate and leather material substrate, and then add them to a twin-screw extruder for melt extrusion, cooling and shaping, oiling, stretching, cooling and winding spinning, wherein the melt temperature is 240-280°C and the screw speed is 350-500r / min.

[0031] The plant essential oil microcapsule powder contains Elsholtzia ciliata essential oil, Hypericum perforatum essential oil, Nepeta tenuifolia essential oil and Ashoka fruit essential oil in a weight ratio of 1:2:2:1.

[0032] The additive is one or more of nano calcium carbonate, silicon dioxide, talcum powder, silicon powder, titanium dioxide, and glass beads; the dispersant is vinyl bisstearamide or polyethylene wax with a molecular weight of 2600-3000; and the plasticizer is acetyl tributyl citrate.

[0033] Example 2

[0034] The difference between this embodiment and embodiment 1 is that:

[0035] 120 parts of PCT, 30 parts of plant essential oil microcapsule powder, 140 parts of PP, 25 parts of titanium dioxide, 15 parts of polylysine photosensitive molecules, 7 parts of additives, 3.5 parts of dispersants, and 2 parts of plasticizers.

[0036] The plant essential oil microcapsule powder contains Elsholtzia ciliata essential oil, Hypericum perforatum essential oil, Nepeta tenuifolia essential oil and Ashoka fruit essential oil in a weight ratio of 1:1.5:2:1.2.

[0037] Example 3

[0038] 90 parts of PCT, 20 parts of plant essential oil microcapsule powder, 120 parts of PP, 15 parts of titanium dioxide, 8 parts of polylysine photosensitive molecules, 5 parts of additives, 2.5 parts of dispersants, and 1.5 parts of plasticizers.

[0039] The plant essential oil microcapsule powder contains Elsholtzia ciliata essential oil, Hypericum perforatum essential oil, Nepeta tenuifolia essential oil and Ashoka fruit essential oil in a weight ratio of 1.2:1.8:1.8:1.

[0040] Example 4

[0041] The difference between this embodiment and embodiment 1 is that:

[0042] 110 parts of PCT, 25 parts of plant essential oil microcapsule powder, 130 parts of PP, 24 parts of titanium dioxide, 12 parts of polylysine photosensitive molecules, 6.5 parts of additives, 3.2 parts of dispersants, and 1.8 parts of plasticizers.

[0043] The plant essential oil microcapsule powder contains Elsholtzia ciliata essential oil, Hypericum perforatum essential oil, Nepeta tenuifolia essential oil and Ashoka fruit essential oil in a weight ratio of 1:1.2:1.8:1.2.

[0044] Example 5

[0045] The difference between this embodiment and embodiment 1 is that:

[0046] 115 parts of PCT, 26 parts of plant essential oil microcapsule powder, 115 parts of PP, 18 parts of titanium dioxide, 10 parts of polylysine photosensitive molecules, 4.5 parts of additives, 3 parts of dispersants, and 1.5 parts of plasticizers.

[0047] The plant essential oil microcapsule powder contains Elsholtzia ciliata essential oil, Hypericum perforatum essential oil, Nepeta tenuifolia essential oil and Ashoka fruit essential oil in a weight ratio of 1:1.4:2:1.6.

[0048] Example 6

[0049] The difference between this embodiment and embodiment 1 is that:

[0050] 110 parts of PCT, 26 parts of plant essential oil microcapsule powder, 125 parts of PP, 22 parts of titanium dioxide, 12 parts of polylysine photosensitive molecules, 6.8 parts of additives, 3.2 parts of dispersants, and 1.6 parts of plasticizers.

[0051] The diameter and elongation at break of the antibacterial and antiviral wig fibers obtained in Examples 1-6 were tested, and the quality, softness and combing properties of the same amount of regenerated polyester wig fibers were evaluated by sensory testing. The results are shown in Table 1.

[0052] Table 1 Performance test results of real hair straightener and samples of Examples 1-6 of the present invention

[0053]

[0054] As can be seen from Table 1, the breaking strength, breaking elongation, flexibility and combing performance of the wig fibers of the present invention obtained in Examples 1-6 all meet the relevant standards, indicating that the antibacterial and antiviral wig fibers obtained in the present invention have the advantages of good flexibility, excellent elasticity, excellent mechanical properties, etc.

[0055] To further illustrate the antibacterial and antiviral properties of the wig fibers obtained in Examples 1-6, the antibacterial and antiviral performance tests were performed on the samples of Examples 1-6.

[0056] Antibacterial performance test: According to GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method", the antibacterial properties of composite fibers and knitted fabrics against Escherichia coli, Staphylococcus aureus and Candida albicans were tested.

[0057] Antiviral performance test: The test was conducted in accordance with ISO 18184:2014 (E) "Test Standard for Antiviral Textiles". The virus used in the test was influenza A virus H3N2 MDCK cells. The common logarithmic average of the three infection titer values ​​of the control group immediately after virus inoculation and the common logarithmic average of the three infection titer values ​​after 2 hours of contact with the antiviral fabric specimen were obtained through the test, and the antiviral activity value was calculated. The standard stipulates that if the antiviral activity value of the textile is lower than 3.0, that is, the antiviral activity rate is lower than 99.9%, then the antiviral effect of the sample is small. The calculation of the antiviral activity value is shown in formula (1).

[0058] Mv=1g(Va / Vc)=1g(Va)-1g(Vc) (1)

[0059] In formula (1), Mv is the antiviral activity value; lg(Va) is the common logarithm average of the three infection titer values ​​of the control group immediately after inoculation; lg(Vc) is the common logarithm average of the three infection titer values ​​after contact with the antiviral fabric specimen for 2 hours. The calculation method of the antiviral activity rate Mr is shown in formula (2).

[0060] Mr=(1-10 －Mv )× 100% (2)

[0061] The antibacterial and antiviral properties of Example Samples 1-6 are shown in Table 2.

[0062] Table 2

[0063]

[0064] From the results in Table 2, it can be seen that the antibacterial rates of the wig fibers obtained in Examples 1-6 against Escherichia coli, Staphylococcus aureus, and Candida albicans can reach more than 95%, and the antiviral activity rates against influenza A virus H3N2 can reach more than 99.9%, and the highest can reach 99.99%. The above results show that the wig fibers of the present invention have excellent antibacterial and antiviral properties.

[0065] In order to further illustrate the advantages of the formulation of the present invention, the antibacterial and antiviral properties of different formulations and the obtained wig fibers of the present invention are provided below.

[0066] Sample preparation and grouping:

[0067] Sample 1: prepared as described in Example 6;

[0068] Sample 2: The difference from Example 6 is that no plant essential oil microcapsule powder is added to the core layer;

[0069] Sample 3: The difference from Example 6 is that titanium dioxide and polylysine photosensitive molecules are not added to the cortex;

[0070] Sample 4: The difference from Example 6 is that titanium dioxide is not added to the skin layer;

[0071] Sample 5: The difference from Example 6 is that no poly-lysine photosensitive molecules are added to the cortex;

[0072] Samples 1-5 were prepared as described above, and their antibacterial and antiviral properties were tested.

[0073] Test method:

[0074] Antibacterial performance test: According to GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method", the antibacterial properties of composite fibers and knitted fabrics against Escherichia coli, Staphylococcus aureus and Candida albicans were tested.

[0075] Antiviral performance test: The test was conducted in accordance with ISO 18184:2014 (E) "Test Standard for Antiviral Textiles". The virus used in the test was influenza A virus H3N2 MDCK cells. The common logarithmic average of the three infection titer values ​​of the control group immediately after virus inoculation and the common logarithmic average of the three infection titer values ​​after 2 hours of contact with the antiviral fabric specimen were obtained through the test, and the antiviral activity value was calculated. The standard stipulates that if the antiviral activity value of the textile is lower than 3.0, that is, the antiviral activity rate is lower than 99.9%, then the antiviral effect of the sample is small. The calculation of the antiviral activity value is shown in formula (1).

[0076] Mv=1g(Va / Vc)=1g(Va)-1g(Vc) (1)

[0077] In formula (1), Mv is the antiviral activity value; lg(Va) is the common logarithm average of the three infection titer values ​​of the control group immediately after inoculation; lg(Vc) is the common logarithm average of the three infection titer values ​​after contact with the antiviral fabric specimen for 2 hours. The calculation method of the antiviral activity rate Mr is shown in formula (2).

[0078] Mr=(1-10 －Mv )× 100% (2)

[0079] The antibacterial and antiviral properties of samples 1-6 are shown in Table 3.

[0080] Table 3

[0081]

[0082]

[0083] Comparing sample 1 with samples 2 and 3, the antibacterial rates of sample 1 against Escherichia coli, Staphylococcus aureus and Candida albicans are all above 97%, and the antibacterial rates of samples 2 and 3 against Escherichia coli, Staphylococcus aureus and Candida albicans are all between 71% and 78%. The antibacterial effect of sample 1 is significantly higher than that of samples 2 and 3; the antiviral activity value of sample 1 is significantly higher than that of samples 2 and 3, and the antiviral activity rate reaches 99.99%, while the antiviral activity rates of samples 2 and 3 are both lower than 99.9%, and the antiviral effect is small; the above results indicate that the plant essential oil microcapsule powder in the core layer cooperates with the titanium dioxide and polylysine in the cortex to jointly achieve the excellent antibacterial and antiviral properties of the wig fiber.

[0084] Comparing sample 1 with samples 3, 4, and 5, the antibacterial rates of sample 1 against Escherichia coli, Staphylococcus aureus, and Candida albicans are all above 97%, the antibacterial rates of sample 3 against Escherichia coli, Staphylococcus aureus, and Candida albicans are 75-78%, and the antibacterial rates of samples 4 and 5 against Escherichia coli, Staphylococcus aureus, and Candida albicans are all 80-83%. The antibacterial effect of sample 1 is significantly higher than that of samples 3, 4, and 5, and the antibacterial effect of samples 4 and 5 is slightly higher than that of sample 3; the antiviral activity value of sample 1 is significantly higher than that of samples 3, 4, and 5, and the antiviral activity rate reaches 99.99%, while the antiviral activity rates of samples 3, 4, and 5 are all lower than 99.9%, and the antiviral effect is small; the above results indicate that titanium dioxide and polylysine in the cortex cooperate with each other to synergistically enhance the excellent antibacterial and antiviral properties of the wig fiber.

[0085] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An antibacterial and antiviral sheath-core composite wig fiber, comprising a sheath layer and a core layer, characterized in that: The core layer contains PCT and plant essential oil microcapsule powder; the cortex contains PP, titanium dioxide, and polylysine photosensitive molecules; the wig fiber is made of the following raw materials in parts by weight: 80-120 parts of PCT, 15-30 parts of plant essential oil microcapsule powder, 100-140 parts of PP, 10-30 parts of titanium dioxide, 5-20 parts of polylysine photosensitive molecules, 4-8 parts of additives, 2-4 parts of dispersants, and 1-2 parts of plasticizers; the plant essential oil microcapsule powder contains Elsholtzia ciliata essential oil, Hypericum perforatum essential oil, Nepeta tenuifolia essential oil, and Asoko fruit essential oil in a weight ratio of 1-2:1-2:1-2:1-2; the plant essential oil microcapsule powder is prepared according to the following steps: (1) mixing Elsholtzia ciliata essential oil, Hypericum perforatum essential oil, Nepeta tenuifolia essential oil, and Ashoka fruit essential oil in a weight ratio of 1-2:1-2:1-2:1-2 to obtain a compound essential oil, which is used as a core material for standby use; (2) preparing gelatin and gum arabic solutions with a mass fraction of 2% respectively in a 50° C. water bath, and then mixing the gelatin and gum arabic solutions in equal volumes for use as wall materials; (3) the core material obtained in step (1) and the wall material obtained in step (2) are mixed in a mass ratio of 1:2, and the mixture is emulsified at high speed for 3 minutes using an emulsifier homogenizer, and then stirred and mixed using a mechanical stirrer at 600 r / min under heating in a 40° C. water bath, and the pH value is adjusted to 3.7-4.0 using 10% acetic acid; after stirring for 30 minutes, the temperature is lowered to below 10° C., and the pH value is adjusted to 6.0 using 10% sodium bicarbonate, and then a curing agent is added for curing, and the curing time is 6-8 hours. Finally, the mixed solution is filtered, washed, centrifuged, and dried to obtain the plant essential oil microcapsule powder; The wig fiber is prepared according to the following steps: (1) Preparing a core material substrate: weighing 80-120 parts of PCT and 15-30 parts of plant essential oil microcapsule powder by weight, then blending them, and extruding and granulating them using a twin-screw extruder to obtain a core material masterbatch at a processing temperature of 100-120° C.; (2) Preparation of leather material substrate: 100-140 parts of PP, 10-30 parts of titanium dioxide, and 5-20 parts of polylysine photosensitive molecules are weighed by weight, and then mixed and extruded and granulated using a twin-screw extruder to obtain leather material masterbatch at a processing temperature of 180-200° C.; (3) Drying the obtained core material substrate and skin material substrate in a vacuum drying oven at 100-120° C. for 6-8 hours; the moisture content after drying is below 50 ppm; (4) Weigh 4-8 parts of additives, 2-4 parts of dispersants, and 1-2 parts of plasticizers by weight, mix them with the dried core material base material and skin material base material, and then add them to a twin-screw extruder for melt extrusion, cooling and shaping, oiling, stretching, and cooling and winding spinning, wherein the melting temperature is 240-280°C and the screw speed is 350-500r / min; the additive is one or more of nano calcium carbonate, silicon dioxide, talcum powder, silicon powder, titanium dioxide, and glass beads; the dispersant is vinyl bisstearamide or polyethylene wax with a molecular weight of 2600-3000; and the plasticizer is acetyl tributyl citrate.

2. The antibacterial and antiviral sheath-core composite wig fiber according to claim 1, characterized in that: The plant essential oil microcapsule powder contains Elsholtzia ciliata essential oil, Hypericum perforatum essential oil, Nepeta tenuifolia essential oil and Ashoka fruit essential oil in a weight ratio of 1:2:2:1.

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