阅读说明：本技术 一种用于纸尿裤的抑菌无纺布 (A antibacterial non-woven fabrics for panty-shape diapers ) 是由 李志林 蔡明利 王颖 王鹏 胡成虎 周辉 于 2020-06-09 设计创作，主要内容包括：本发明公开了一种用于纸尿裤的抑菌无纺布,涉及新型功能材料技术领域,首先用真空等离子体预处理纺粘聚丙烯无纺布进行活化,使浸涂的壳寡糖能结合于无纺布表面,制备出的抑菌无纺布用于纸尿裤本体上接触人体皮肤的面层。该方法制备的纸尿裤面层无纺布无需化学交联剂,不仅具有良好的透气性和透湿性,还可有效抑制微生物滋生。与现有技术相比,利用本发明制备的抑菌无纺布纸尿裤具有抑菌、亲肤、环保无污染的特点。与此同时,无纺布的抗静电性能和吸湿性能较普通产品有所改善,提高了产品的舒适性。(The invention discloses an antibacterial non-woven fabric for paper diapers, and relates to the technical field of novel functional materials. The paper diaper surface layer non-woven fabric prepared by the method does not need a chemical cross-linking agent, not only has good air permeability and moisture permeability, but also can effectively inhibit microorganism breeding. Compared with the prior art, the bacteriostatic non-woven paper diaper prepared by the invention has the characteristics of bacteriostasis, skin friendliness, environmental protection and no pollution. Meanwhile, the antistatic performance and the moisture absorption performance of the non-woven fabric are improved compared with those of common products, and the comfort of the products is improved.)

1. A bacteriostatic non-woven fabric for paper diapers is characterized by comprising the following steps:

1) non-woven fabric pretreatment: soaking the polypropylene spun-bonded non-woven fabric in absolute ethyl alcohol, storing the soaked polypropylene spun-bonded non-woven fabric in a room temperature environment for 24 hours, squeezing, replacing the ethanol in the non-woven fabric with deionized water, completely cleaning, and then putting the non-woven fabric into a blast drying oven at 60-80 ℃ for drying to obtain an impurity-free polypropylene non-woven fabric; then the non-woven fabric is subjected to plasma treatment for 3-5min under the condition that the vacuum plasma power is 100-200W.

2) Preparing a chitosan oligosaccharide finishing liquid: weighing chitosan oligosaccharide with average polymerization degree of 10-15 prepared by an enzymolysis method, dissolving in distilled water, fully and uniformly stirring to prepare a chitosan oligosaccharide solution with concentration of 10% -30% (w/v), and adjusting pH value to 5-7; to prevent the generation of bubbles, the chitosan solution was sonicated for 30 minutes.

3) Finishing non-woven fabrics: coating chitosan oligosaccharide finishing liquid on the surface of the non-woven fabric pretreated in the step 1) by using dip-coating equipment, wherein the temperature of the chitosan oligosaccharide finishing liquid is 50-80 ℃, slightly extruding the dip-coated sample to remove the redundant finishing liquid, drying the sample in a contact dryer at 105 ℃ for 5-10min, and then repeating the dip-coating finishing once. And (3) carrying out bacteriostatic performance detection on the finished sample including Escherichia coli and staphylococcus aureus.

2. The bacteriostatic non-woven fabric for the paper diaper surface layer as claimed in claim 1, which is characterized in that: the non-woven fabric is an impurity-free spun-bonded polypropylene non-woven fabric subjected to ethanol extraction treatment.

3. The bacteriostatic non-woven fabric for the paper diaper according to claim 1, characterized in that: the average polymerization degree of the chitosan oligosaccharide is 10-15.

4. The bacteriostatic non-woven fabric for the paper diaper according to claim 1, characterized in that: the vacuum plasma treatment conditions were 100-.

5. The bacteriostatic non-woven fabric for the paper diaper according to claim 1, characterized in that: the dip coating temperature of the finishing liquid of the chitosan oligosaccharide is 50-80 ℃, and the drying temperature is 105 ℃.

Technical Field

The invention relates to the field of novel functional materials, in particular to an antibacterial non-woven fabric for paper diapers.

Background

It is expected that the aged population over 60 years old in China in 2025 will break through 3 hundred million. The coming of the aging society brings the need for some products for old people. The proportion of the adult paper diaper used as an aging product by the old people in China is only 1.0 percent and is far lower than the average level of the world by 12 percent, and the production of products such as high-quality adult paper diapers or nursing pads and the like and related products thereof has important social significance.

As the paper diaper which is not replaced in time is easy to form a moist and sultry environment, bacteria are easy to breed, a large amount of ammonia gas and the like are produced by breeding, so that the pH value is increased, the skin is stimulated, skin diseases are caused or the skin of a patient is infected, and the health is not facilitated. Therefore, the paper diaper should be endowed with antibacterial and bacteriostatic functions to solve the problem of bacterial breeding.

At present, some bacteriostatic paper diapers generally adopt traditional Chinese medicines for bacteriostasis, solvents such as alcohol and essence are generally required to be added for dissolving bacteriostatic medicines, and the preservative prevents oxidation, but substances such as the alcohol, the essence and the preservative stimulate the skin and the alcohol is volatile, so that bacteriostatic performance is lost to a certain extent. Chinese patent 201310472761.2 discloses a method for preparing bacteriostatic non-woven fabric for sanitary towel flow guide layer, which comprises the steps of attaching bacteriostatic finishing liquid containing chitosan to the surface of a spunlace non-woven fabric substrate in a roller coating mode, and then carrying out drying and forming treatment. The prepared bacteriostatic non-woven fabric can effectively inhibit the breeding of microorganisms, is safe and environment-friendly, but the chitosan is insoluble in water and soluble in dilute acid, and needs to be treated before application. The chinese patent No. 201110431244 proposes that water-soluble chitosan solid particles are arranged on the absorption layer, and dissolved in water to exert antibacterial performance, but the granular water-soluble chitosan has limited dissolving performance, more using amount, resource waste and uneven distribution, which leads to poor antibacterial performance.

Disclosure of Invention

In order to meet the requirements of the paper diaper material on antibiosis, ventilation, safety, environmental protection and the like, the invention provides the preparation method of the bacteriostatic non-woven fabric for the paper diaper, which meets the requirements of the non-woven fabric on antibiosis, ventilation, safety and environmental protection and is easy to realize industrial operation and production.

In order to realize the purpose, the invention is realized by the following technical scheme:

1. preparing a bacteriostatic non-woven fabric for a paper diaper, comprising the following steps of:

1) non-woven fabric pretreatment: soaking the polypropylene spun-bonded non-woven fabric in absolute ethyl alcohol, storing the soaked polypropylene spun-bonded non-woven fabric in a room temperature environment for 24 hours, squeezing, replacing the ethanol in the non-woven fabric with deionized water, completely cleaning, and then putting the non-woven fabric into a blast drying oven at 60-80 ℃ for drying to obtain an impurity-free polypropylene non-woven fabric; then the non-woven fabric is subjected to plasma treatment for 3-5min under the condition that the vacuum plasma power is 100-200W.

2) Preparing a chitosan oligosaccharide finishing liquid: weighing chitosan oligosaccharide with average polymerization degree of 10-15 prepared by an enzymolysis method, dissolving in distilled water, fully and uniformly stirring to prepare a chitosan oligosaccharide solution with concentration of 10% -30% (w/v), and adjusting pH value to 5-7; to prevent the generation of bubbles, the chitosan solution was sonicated for 30 minutes.

3) Finishing non-woven fabrics: coating chitosan oligosaccharide finishing liquid on the surface of the non-woven fabric pretreated in the step 1) by using dip-coating equipment, wherein the temperature of the chitosan oligosaccharide finishing liquid is 50-80 ℃, slightly extruding the dip-coated sample to remove the redundant finishing liquid, drying the sample in a contact dryer at 105 ℃ for 5-10min, and then repeating the dip-coating finishing once. And (3) carrying out bacteriostatic performance detection on the finished sample including Escherichia coli and staphylococcus aureus.

2. The bacteriostatic non-woven fabric for the surface layer of the paper diaper according to the 1, wherein the non-woven fabric is an impurity-free spun-bonded polypropylene non-woven fabric subjected to ethanol extraction treatment.

3. The bacteriostatic non-woven fabric for the paper diaper according to the 1, wherein the average polymerization degree of the chitosan oligosaccharide is 10-15.

4. According to the bacteriostatic non-woven fabric for the paper diaper 1, the vacuum plasma treatment condition is that the power is 100-.

5. The bacteriostatic non-woven fabric for the paper diaper according to claim 1, wherein the finishing liquid of the chitosan oligosaccharide is dipped at 50-80 ℃ and dried at 105 ℃.

6. The bacteriostatic non-woven fabric for the paper diaper according to 1, wherein the bacterial species used in the bacteriostatic test comprise Escherichia coli (E bacteria) and staphylococcus aureus (S bacteria).

Compared with the background art, the invention has the beneficial effects that:

the chitosan oligosaccharide applied in the invention has the advantages of low molecular weight, good water solubility, large functional effect, high biological activity and the like, has the characteristics of pure nature, no radiation, no pollution, no addition and the like, is widely applied to the fields of agriculture, food, environmental protection, medicine and the like, has skin-friendly and efficient bacteriostatic effects in moisturizing, anti-wrinkle, sun-screening and other types of skin care products, and can effectively inhibit bacteria when applied to the surface layer of the paper diaper.

According to the bacteriostatic non-woven fabric for the paper diaper, the hydrophobic polypropylene non-woven fabric is subjected to plasma surface hydrophilic modification, and the electron etching effect of vacuum plasma is utilized to cause the macromolecular chains on the fiber surface of the non-woven fabric to break, generate rough micro-pits on the fiber surface and increase hydrophilic and active binding points, so that the non-woven fabric is more firmly bound with chitosan oligosaccharide and cannot be separated along with urine. The chitosan oligosaccharide prepared by the enzymolysis method is combined with the active surface of the polypropylene non-woven fabric treated by the vacuum plasma, and the method does not need a chemical cross-linking agent to fix the chitosan oligosaccharide or carry out non-woven fabric chemical modification, thereby reducing the chemical components of the skin-friendly layer of the paper diaper. The non-woven fabric can effectively inhibit breeding of microorganisms, has multiple characteristics of ventilation, environmental protection and the like, meets the current requirements on the paper diaper material, and has important practical significance. And the requirements of non-woven fabric on antibiosis, ventilation, safety and environmental protection are met, and meanwhile, the industrial operation and production are easy to realize.

Detailed Description

For better understanding of the objects and technical solutions of the present invention, the present invention will be further described with reference to the following specific examples, which are provided for illustration only and are not intended to limit the present invention in any way.