Antimicrobial Nonwoven Cloth, Preparation Method Thereof and Mask with the Antimicrobial Nonwoven Cloth

Abstract

The present invention discloses an antimicrobial nonwoven cloth, whose raw materials comprising the following components in weight ratio: 75100 parts of polypropylene, 1025 parts of sodium p-styrenesulfonate, 1020 parts of silane coupling agent, 0.151 part of polyhexamethylene biguanidine hydrochloride (PHMB), 0.050.4 part of zinc salt, 15 parts of bamboo charcoal fiber, and 0.010.1 part of nanometer fumed silica. Further, a method of preparing the antimicrobial nonwoven cloth and a mask with antimicrobial nonwoven cloth are disclosed, to prevent bacteria from spreading through the air and saliva.

Claims

1. An antimicrobial nonwoven cloth, whose raw materials comprising the following components in weight ratio: 75100 parts of polypropylene, 1025 parts of sodium p-styrenesulfonate, 1020 parts of silane coupling agent, 0.151 part of PHMB, 0.050.4 part of zinc salt, 15 parts of bamboo charcoal fiber, and 0.010.1 part of nano-meter fumed silica.

2. A method of preparing an antimicrobial nonwoven cloth, comprising the following steps: (1) Weighing: Weighing the following components in weight ratio: 75100 parts of polypropylene, 1025 parts of sodium p-styrenesulfonate, 1020 parts of silane coupling agent, 0.151 part of PHMB, 0.050.4 part of zinc salt, 15 parts of bamboo charcoal fiber, and 0.010.1 part of nano-meter fumed silica; (2) heating the weighed aqueous solution of polypropylene, sodium p-styrenesulfonate, silane coupling agent in a water bath to 602 C., keeping warm and stirring for 2.50.5 h, and carrying out UV irradiation for 152 min and then cooling to 252 C. to obtain a polypropylene mixture; (3) preparing a composite solution using the weighed PHMB and zinc salt by the aqueous reaction method, then adding nano-meter fumed silica to obtain a composite antimicrobial agent; of which, using PHMB of different viscosity averaged relative molecular weights as a ligand, and adding zinc salt at a ratio of 56% to synthesize a stable micron-sized Zn-PHMB cationic complex from agglomerated small particles; (4) mixing the polypropylene mixture obtained in step (2) with bamboo charcoal fiber at 455 C. and stirring for 10.5 h, then adding the composite antimicrobial agent in step (3), stirring for 205 min and then standing for 1.50.5 h to obtain antimicrobial fiber solution, and then spinning to obtain antimicrobial nonwoven cloth fiber; (5) placing the antimicrobial nonwoven cloth fiber in step (4) on a mold for positioning and arrangement, and heat-pressing to form a fiber network structure; (6) adding anionic polyacrylamide solution as sizing liquid in the sizing machine, immersing the antimicrobial nonwoven cloth fiber web into the slurry with a temperature of 905 C. at a speed of 705 m/min, and then entering a drying room at a temperature of 1355 C. for drying; (7) after the sized and dried antimicrobial nonwoven cloth fiber web undergoes open-width treatment, performing desizing twice, washing out with warm water, and spraying ozone oil onto the web; (8) drying the desized fiber web qualitatively to prepare an antimicrobial nonwoven cloth product.

3. The method for preparing antimicrobial nonwoven cloth according to claim 2, wherein the steps for preparing the bamboo charcoal fiber are as follows: (1) performing cleaning the raw material moso bamboo, and drying it at a temperature of 505 C. in a sterile environment, then evenly cutting and placing it in a carbonization furnace; (2) carrying out carbonization in a carbonization furnace under a pure oxygen high temperature environment by setting the initial firing temperature of the carbonization furnace at 40050 C. and the initial firing time at 10.5 h; setting the calcination temperature of the carbonization furnace at 85050 C. and the calcination time at 30.5 h; using nitrogen with a purity of 98% for barrier during the carbonization process; (3) obtaining the carbonized bamboo charcoal fiber product.

4. A mask with antimicrobial nonwoven cloth, comprising a mask body, a mask belt, and a nose strip, the mask body comprises at least one antimicrobial nonwoven cloth layer, and at least one filter cloth layer, and the antimicrobial nonwoven cloth layer is bonded with the filter cloth layer, the filter cloth layer is disposed away from the face, and the antimicrobial nonwoven cloth layer is disposed close to the face; the mask belt is disposed on the side of the mask body and is used to closely fit the mask body to the face; the nose strip is disposed on the upper part of the mask body and is used to closely fit the mask body to the bridge of the nose; the material of the antimicrobial nonwoven cloth layer is the antimicrobial nonwoven cloth of claim 1.

5. The mask according to claim 4, wherein the mask belt is disposed on both sides of the mask body through earloop, headband or tie-on.

6. The mask according to claim 4, wherein a protective goggle is further provided on the mask body.

7. The mask according to claim 5, wherein a protective goggle is further provided on the mask body.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG. 1 is a structural representation of a mask with an earloop mask belt disposed on the mask body in the present invention;

[0027] FIG. 2 is a structural representation of a mask with a headband mask belt disposed on the mask body in the present invention;

[0028] FIG. 3 is a structural representation of a mask with a tie-on mask belt disposed on the mask body in the present invention;

[0029] FIG. 4 is a structural representation of a mask with a protective goggle disposed on the mask body in the present invention.

DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with specific embodiments. The following embodiments are merely used to illustrate the technical solutions more clearly rather than limit the scope of protection of the present invention.

Example 1

[0031] An antimicrobial nonwoven cloth, whose raw materials comprising the following components in weight ratio: 75100 parts of polypropylene, 1025 parts of sodium p-styrenesulfonate, 1020 parts of silane coupling agent, 0.151 part of PHMB, 0.050.4 part of zinc salt, 15 parts of bamboo charcoal fiber, and 0.010.1 part of nano-meter fumed silica.

[0032] Specifically, polyhexamethylene biguanide (PHMB) has a broad spectrum of bactericidal activity, low effective concentration, fast action speed, stable properties, and is easily soluble in water. It can be used at room temperature for long-term bacteriostasis. It has no side effects, no corrosivity, and is colorless, odorless, non-toxic, non-flammable, non-explosive, safe to use, so it is the best antimicrobial in practice. The antimicrobial effects of PHMB: 0.02% PHMB has an antimicrobial rate of 100% against Escherichia coli; 0.02% PHMB has an antimicrobial rate of 100% against Staphylococcus aureus; 0.02% PHMB has an antimicrobial rate of 100% against Candida albicans; 0.02% PHMB has an antimicrobial rate of 100% against Neisseria gonorrhoeae. The on-site antimicrobial test showed an antimicrobial rate of 99.8% on the surface of objects, which was greater than the national standard of 90%. The on-site antimicrobial test showed an antimicrobial rate of 97.65% on the palm surface, which was greater than the national standard of 90%. Therefore, PHMB used in the present invention has obvious antimicrobial effect, and has the killing ability against Gram-positive bacteria, Gram-negative bacteria, fungi (a variety of ringworms and molds) and yeasts.

[0033] Zinc ion (Zn) is involved in the activities of a number of enzymes related to human health. Zinc itself has astringent, antibacterial, anti-dandruff, and protective effects. Zinc ion is involved in the differentiation of epithelial tissues, with the anti-inflammatory effects. In addition, zinc ion can reduce UV-induced cell and gene damage, and improve the tolerance of skin fibroblasts to oxidative stress responses. Therefore, zinc salt and PHMB are used together in the present invention.

[0034] As a carrier, polypropylene (PP) has low density, good heat resistance, high strength, and chemical stability. It is a translucent and colorless solid, odorless and non-toxic. PP, as a carrier, is light in weight, good in heat retention and has very low hygroscopicity. Its moisture regain is almost close to zero under general atmospheric conditions, but it has a wicking effect and can transmit water vapor through the capillary in the fabric, while it does not absorb any moisture.

Example 2

[0035] The present invention further provides a method of preparing an antimicrobial nonwoven cloth, comprising the following steps:

[0036] (1) Weighing: Weighing the following components in weight ratio: 75100 parts of polypropylene, 1025 parts of sodium p-styrenesulfonate, 1020 parts of silane coupling agent, 0.151 part of PHMB, 0.050.4 part of zinc salt, 15 parts of bamboo charcoal fiber, and 0.010.1 part of nano-meter fumed silica;

[0037] (2) Heating the weighed aqueous solution of polypropylene, sodium p-styrenesulfonate, silane coupling agent in a water bath to 602 C., keeping warm and stirring for 2.50.5 h, and carrying out UV irradiation for 152 min and then cooling to 252 C. to obtain a polypropylene mixture;

[0038] (3) Preparing a composite solution using the weighed PHMB and zinc salt by the aqueous reaction method, then adding nano-meter fumed silica to obtain a composite antimicrobial agent; of which, using PHMB of different viscosity averaged relative molecular weights as a ligand, and adding zinc salt at a ratio of 5-6% to synthesize a stable micron-sized Zn-PHMB cationic complex from agglomerated small particles;

[0039] (4) Mixing the polypropylene mixture obtained in step (2) with bamboo charcoal fiber at 455 C. and stirring for 10.5 h, then adding the composite antimicrobial agent in step (3), stirring for 205 min and then standing for 1.50.5 h to obtain antimicrobial fiber solution, and then spinning to obtain antimicrobial nonwoven cloth fiber;

[0040] (5) Placing the antimicrobial nonwoven cloth fiber in step (4) on a mold for positioning and arrangement, and heat-pressing to form a fiber network structure;

[0041] (6) Adding anionic polyacrylamide solution as sizing liquid in the sizing machine, immersing the antimicrobial nonwoven cloth fiber web into the slurry with a temperature of 905 C. at a speed of 705 m/min, and then entering a drying room at a temperature of 1355 C. for drying;

[0042] (7) After the sized and dried antimicrobial nonwoven cloth fiber web undergoes open-width treatment, performing desizing twice, washing out with warm water, and spraying ozone oil onto the web;

[0043] (8) Drying the desized fiber web qualitatively to prepare an antimicrobial nonwoven cloth product.

[0044] Specifically, the antimicrobial nonwoven cloth prepared by the method has strong antimicrobial function, moisture absorption and perspiration comfort. The antimicrobial nonwoven cloth is suitable for making the antimicrobial nonwoven cloth layer of the mask, and the prepared mask is antibacterial, comfortable, non-toxic and odorless and flame retardant, so it is the first choice to prevent cross infection.

[0045] Preferably, the steps for preparing the bamboo charcoal fiber are as follows:

[0046] (1) Performing cleaning the raw material moso bamboo, and drying it at a temperature of 505 C. in a sterile environment, then evenly cutting and placing it in a carbonization furnace;

[0047] (2) Carrying out carbonization in a carbonization furnace under a pure oxygen high temperature environment by setting the initial firing temperature of the carbonization furnace at 40050 C. and the initial firing time at 10.5 h; setting the calcination temperature of the carbonization furnace at 85050 C. and the calcination time at 30.5 h; using nitrogen with a purity of 98% for barrier during the carbonization process;

[0048] (3) Obtaining the carbonized bamboo charcoal fiber product.

[0049] Specifically, due to the addition of bamboo charcoal fiber, it is fully utilized to generate negative ions and far infrared rays during use, to achieve partial disinfection and sterilization, and increase the healthy negative ions in the air. The bamboo charcoal fiber made by this method is suitable for ordinary uses. With a smooth surface and a soft feel, excellent bacteriostasis, sterilization and hygroscopicity, and low cost, it can meet the requirements of various hygiene indexes.

Example 3

[0050] As shown in FIGS. 1-4, the present invention further provides a mask with antimicrobial nonwoven cloth, comprising a mask body 1, a mask belt 2, and a nose strip 3, the mask body 1 comprises at least one antimicrobial nonwoven cloth layer 11, and at least one filter cloth layer 12, and the antimicrobial nonwoven cloth layer 11 is bonded with the filter cloth layer 12, the filter cloth layer 12 is disposed away from the face, and the antimicrobial nonwoven cloth layer 11 is disposed close to the face; the mask belt 2 is disposed on the side of the mask body 1 and is used to closely fit the mask body 1 to the face; the nose strip 3 is disposed on the upper part of the mask body 1 and is used to closely fit the mask body 1 to the bridge of the nose; the material of the antimicrobial nonwoven cloth layer 11 is the antimicrobial nonwoven cloth of claim 1.

[0051] Preferably, the mask belt 2 is disposed on both sides of the mask body 1 through earloop, headband or tie-on.

[0052] Preferably, a protective goggle 4 is further provided on the mask body 1. Further, the protective goggle 4 adopts transparent lenses, and the lens material is PET (polyester film).

[0053] Preferably, the nose strip 3 is made of bendable ductile material or metal wire wrapped with plastic. The length of the nose strip 3 should not be less than 8.0 cm; the mask belt 2 is made of rubber string, and measured with a static tension of 10N for 5 seconds. The breaking strength at the connection point between each mask belt 2 and the mask body 1 is not less than 10N.

[0054] Specifically, when the mask of the present invention is used, the mask should be able to cover the mouth, nose and jaw of the wearer.

[0055] The antibacterial activity test was conducted for the mask of the present invention in accordance with GB/T20944.3-2008 Textiles-Evaluation for antibacterial activityPart 3: Shake flask method. The results showed that the antibacterial rates against Candida albicans, Escherichia coli and Staphylococcus aureus all reached 99%.

[0056] The test of residual amount of ethylene oxide was conducted for the mask of the present invention in accordance with the method specified in Appendix G of GB15980-2003. The residual amount of ethylene oxide should be not less than 10 m/g.

[0057] The bacterial filtration efficiency was tested for the mask of the present invention. Three samples were randomly selected to conduct testing of bacterial filtration efficiency (the percentage of bacteria-containing suspended particles filtered by the mask material under a specified flow rate) according to the method in YY0469. The bacterial filtration efficiency was not less than 95%.

[0058] The airflow resistance test (the resistance of the mask under a specified area and a specified flow rate, expressed as a pressure difference) was performed on the mask of the present invention. Three samples were randomly selected to conduct testing. The middle part of the mask was taken and the gas flow rate was adjusted to (80.2) L/min; the diameter of the sample test area was 25 mm, and the test area of the test sample was A. The pressure difference on both sides of the mask was measured by a differential pressure gauge or equivalent equipment, and the airflow resistance was calculated according to the formula P=M/A, where P was the pressure difference per square centimeter of the test sample, in unit of Pa/cm2; M was the pressure difference of the test sample, in unit of Pa, A was the test area of the test sample, in unit of square centimeter (cm2). The airflow resistance for gas exchange on both sides of the mask was not more than 9 Pa/cm2.

[0059] The above descriptions are merely the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principles of the present invention, improvements and modifications can be made, and these improvements and modifications shall fall into the scope of protection of the present invention.