CN114575036B - Pine needle-based long-acting antibacterial fully-degradable melt-blown fabric and preparation method thereof - Google Patents
Pine needle-based long-acting antibacterial fully-degradable melt-blown fabric and preparation method thereof Download PDFInfo
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/103—Agents inhibiting growth of microorganisms
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
- D04H1/55—Polyesters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Abstract
The invention relates to a pine needle based long-acting antibacterial and fully degradable melt-blown fabric and a preparation method thereof. The melt-blown fabric comprises the following raw materials: liquid compound auxiliary agent, pine needle, ginger stalk powder, licorice powder, spicy Liao Fen, seaweed fiber micropowder, mung bean starch, distiller's yeast, lactobacillus and polybutylene succinate. The melt-blown fabric is prepared by combining pine needles serving as main raw materials with other natural materials, and after the reaction is promoted by mutual synergy, the special structure and the value of the performance formed by the obtained target product are reflected, the technical problem of how to use the pine needles as the main raw materials of the melt-blown fabric is solved, the application field of the pine needle-based melt-blown fabric material is effectively expanded, and the preparation of wine is synchronously realized in the process implementation process, so that the melt-blown fabric is obtained at one time. The antibacterial performance and other comprehensive index detection results show that the melt-blown fabric is superior to the similar products sold in the market in terms of antibacterial performance, degradation performance and the like.
Description
Technical Field
The invention belongs to the field of functional melt-blown cloth, and particularly relates to pine needle-based long-acting antibacterial full-degradable melt-blown cloth and a preparation method thereof.
Background
The pine needle is needle leaf of pine tree, and has no toxicity and high medical care value. The plant growth regulator has the advantages of high growth speed, wide distribution, capability of harvesting all the year round, extremely rich reserve, sustainable development and utilization value and environment-friendly resource which can not be exhausted. It is rich in proteins, fats, procyanidins, vitamins, polyphenols, bioflavonoids, alkaloids, minerals, crude fiber, phytoncide, etc., and also contains a large amount of SOD disproportionation. Therefore, the product has the functions of resisting oxidation, delaying aging, inhibiting bacteria, resisting viruses, improving immunity and the like, can obviously improve microcirculation and respiratory systems in human bodies, especially contains selenium-rich elements, can prevent and resist cancers, and has the effects of preventing hypertension, hyperlipidemia and cardiovascular diseases.
It is also noted that, whether in the future or at present, daily barrier protection against viruses, harmful bacteria, toxic gases is of paramount importance. Most of the protective articles such as disposable medical masks, protective clothing, gloves and the like are formed by secondary processing of melt-blown cloth, but most of the melt-blown cloth used at present is formed by melt-blowing petroleum-based resins such as polypropylene or other olefin-based copolymers. The petroleum-based plastic is not a degradable material and has certain harm to health, and products prepared from petroleum-based plastics all contain plastic particle components, wherein the plastic particles contain phthalate, organotin, nonylphenol, polybrominated diphenyl ether and triclosan, and the protective articles with toxic chemical substances can slowly release the toxic particles into natural environment during use, so that irreversible injury is caused to human bodies.
In the prior known technology, the research on the application of pine needles as main materials to the preparation process of functional melt-blown cloth is lacking, so the technical scheme of the invention is proposed based on the research.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a pine needle-based long-acting antibacterial fully-degradable melt-blown fabric and a preparation method thereof. The pine needle-based long-acting antibacterial and fully degradable melt-blown fabric is prepared by combining pine needles serving as main raw materials with other natural materials, and after mutual synergistic promotion reaction, the special structure and the value of characteristics formed by the obtained target product are reflected, the technical problem of how to use the pine needle-based long-acting antibacterial and fully degradable melt-blown fabric as the main raw materials of the melt-blown fabric is solved, the application field of the pine needle-based melt-blown fabric material is effectively expanded, and the preparation of wine is synchronously realized in the process implementation process, so that the pine needle-based long-acting antibacterial and fully degradable melt-blown fabric is obtained. The final product not only can play a role in guaranteeing the health and safety of people, but also can provide a new strategy and solution for reducing the treatment cost of medical waste and secondary pollution hazard caused by the treatment cost; the antibacterial performance and other comprehensive index detection results show that the melt-blown fabric is superior to the similar products sold in the market in terms of antibacterial performance, degradation performance and the like.
The invention provides a pine needle-based long-acting antibacterial and fully-degradable melt-blown fabric, which comprises the following raw materials in parts by weight: liquid composite auxiliary agent: 60-100 parts of pine needles: 28-40 parts of ginger stalk powder: 3-5 parts of licorice powder: 3-5 parts of spicy Liao Fen: 1-5 parts of alginate fiber micropowder: 3-5 parts of mung bean starch: 13-30 parts of distiller's yeast: 1-4 parts of lactobacillus: 1-6 parts of poly (butylene succinate): 60-100 parts.
Preferably, the pine needle based long-acting antibacterial and fully degradable melt-blown fabric comprises the following raw materials in parts by weight: liquid composite auxiliary agent: 80 parts of pine needles: 34 parts of ginger straw powder: 4 parts of licorice powder: 4 parts of spicy Liao Fen: 3 parts of alginate fiber micropowder: 4 parts of mung bean starch: 22 parts of distiller's yeast: 2.5 parts of lactic acid bacteria: 3.5 parts of polybutylene succinate: 80 parts.
Preferably, the liquid composite additive comprises the following raw materials in parts by weight: purified water: 100 parts of sorbitol: 12 parts of high fructose corn syrup: 12 parts of dodecyl glucoside: 4 parts of cocamidopropyl acid sodium carbonate: 2 parts of tea polyphenol: 1.5 parts of sodium citrate: 7.5 parts of high temperature amylase: 0.5 parts of alkaline high temperature xylanase: 0.5 part.
Preferably, the preparation method of the liquid composite additive comprises the following steps:
(1) Heating the purified water to a constant temperature to obtain hot purified water;
(2) Sequentially adding sorbitol, fructose-glucose syrup, dodecyl glucoside, cocamidopropyl acid, tea polyphenol, sodium citrate, high-temperature amylase and alkaline high-temperature xylanase into the hot purified water, and uniformly stirring to obtain the liquid compound auxiliary agent; wherein, the materials must be completely dissolved, and when the mixed liquid has light green tea and strong tea flavor, the preparation of the liquid composite auxiliary agent can be confirmed, and the discharged materials are cooled for standby.
Preferably, the heating is to a constant temperature: 80 ℃, the rotation speed of stirring is as follows: 150r/min.
In addition, the liquid compound auxiliary agent is prepared by compounding purified water, sorbitol, high-temperature amylase, alkaline high-temperature xylanase, a non-surfactant (dodecyl glucoside) and a surfactant (cocamidopropyl acid sodium silicate), and is supplemented with tea polyphenol, citric acid, high-temperature amylase and alkaline high-temperature xylanase. The components are cooperated, so that the microbial agent has the effects of being nontoxic, harmless, sterilizing, strongly penetrating and swelling, and can effectively improve the enzyme activity and promote the enzymolysis reaction capability. The liquid composite additive is compatible with other raw materials, can promote saccharification, can participate in the synergistic reaction of carbohydrate complexes such as cellulose, hemicellulose, lignin, protein and the like in the raw materials, and effectively split and liquefy the multi-plasma raw materials under the action of strong mechanical force to form a high molecular copolymer containing polysaccharide, furans and other carbohydrate complexes and small molecular peptides and the like which are mainly composed of cellulose and lignin, thereby directly providing effective and reliable guarantee for the anaerobic fermentation and enzymolysis process of the invention.
In order to facilitate a clearer understanding of the present invention, the raw materials of the present invention will be described.
Pine needles: the invention is one of main raw materials, can be compatible with other raw materials, and promotes synergistic reaction mutually, thereby exciting activity and increasing a plurality of functional characteristics of target products. In principle, all needles on pine can be adapted for the process according to the invention, which is preferably the more usual light green pinus massoniana needle. When in use, the pine needles are firstly cleaned and sterilized in sequence, and finally crushed to 1 cm to 2cm by a hammer crusher, and then metered, packaged and put in storage for standby. Can be collected by the forestry authorities or purchased commercially.
Ginger stalk powder: removing dust and impurities from ginger stalk, vacuum freeze drying, and superfine pulverizing to obtain 100 mesh powder. The ginger stalk powder is rich in various bioactive components such as ginger essential oil, gingerol, ginger oil and the like, has fine and smooth and coordinated smell, has the effects of activating blood circulation to dissipate blood stasis, strengthening spleen and stomach, has the functions of lasting sterilization, antivirus and immunity improvement, can be coordinated and cooperated with other raw materials, and can be obtained in a market.
Licorice powder: is rich in bioactive substances such as glycyrrhizic acid, glycyrrhizin, flavonoids, etc. Can be mutually compatible with ginger stalk powder, not only can increase antiviral ability, but also has lasting detoxification function. The preferred average particle size is 100 mesh and is not suitable for long storage and commercially available.
Spicy Liao Fen: the natural yeast contained in the yeast can accelerate the propagation of microorganisms and promote the generation of enzymolysis reactants, and can inhibit the damage of nutrient components of distiller's yeast and lactobacillus by harmful bacteria, so that the yeast is a natural antioxidant, and the preferred average particle size is 100 meshes. Commercially available.
Seaweed fiber micropowder: is a novel antibacterial and antiviral fully-degradable cellulose synthetic material with acid and alkali resistance, has good compatibility with other raw materials and excellent synergistic reaction effect, and can be obtained commercially. The preferred average particle size is 800 mesh, water content is 4% and the color is milky white.
Mung bean starch: the product has the advantages of sufficient viscosity, small water absorption, white color, bacteriostasis, antivirus, anti-tumor and detoxification, and can generate a large amount of ethanol and other elements with the unique performance of improving and initiating the target product after the product is subjected to anaerobic fermentation with the spicy wine, distiller's yeast, lactobacillus and other compositions to form a synergistic reaction, so that the product can be obtained commercially. The preferred average particle size is 100 mesh and the water content is 4%.
Distiller's yeast: preferably, the white spirit starter is high in aroma type, saccharification force, protein decomposition force, esterification force and fermentation force and good in stability, and the average grain size is as follows: 60 mesh, commercially available.
Lactic acid bacteria: preferably, the plant lactobacillus is adopted, and in the process of the invention, the mutual promotion and synergistic reaction of the plant lactobacillus and the white distiller's yeast is specifically shown as follows: lactic acid is produced by fermenting sugar in white distiller's yeast, when lactic acid and ethanol which is synchronously produced are heated and are partially dehydrated to generate ethyl lactate, the ethyl lactate can quickly permeate into the molecular structures of pine needles, seaweed fiber micro powder and other active substances, when the temperature is reduced to a certain degree, part of ethanol and ethyl lactate are locked in the cell walls of reactants and are sealed in the molecular structure of a target product for a long time, so that the effects of slow release, long-acting bacteriostasis and lasting and natural fragrance are achieved. Lactic acid bacteria are commercially available according to the standard of GB 4789.35-2016.
Polybutylene succinate: the invention is a natural highly crystalline thermoplastic fully degradable material synthesized by various microorganisms, has extremely high toughness, tensile strength and fiber forming performance, and the inventor discovers that the material has extremely good compatibility with other raw materials (under the condition of not adding any other chemical auxiliary agents) and greatly improves the weather resistance, fragrance and bacteriostasis lasting slow release function of the target product. Preferably MireL (F1006), manufactured in America, is commercially available.
Based on the same technical conception, the invention also provides a preparation method of the pine needle based long-acting antibacterial full-degradable melt-blown fabric, which is characterized by comprising the following steps:
(S1) carrying out temperature control stirring on pine needles, ginger stalk powder, licorice powder, spicy Liao Fen, seaweed fiber micropowder and mung bean starch, then adding a liquid compound auxiliary agent, and continuously and uniformly stirring to obtain a polysaccharide mixture after saccharification and swelling; it is emphasized that after the liquid compound auxiliary agent is added, stirring is continued until a small amount of steam appears on the surface of the material, the material has light and pleasant pine needle essential oil taste, the surface of the material has light green tea color, a small amount of viscous liquid overflows after the material is clenched by hands, the saccharification and swelling steps of the material can be confirmed, and the material is discharged for later use;
(S2) carrying out yarn splitting and fibrillation on the saccharified and swelled multi-plasma mixture, and carrying out shearing, friction, splitting, melting, enzymolysis, liquefaction, plasticization, compression and exhaust on the material to obtain a copolymerization modified multi-plasma mixture; wherein, the yarn splitting and brooming adopts a 320-type parallel three-screw straw yarn splitting and brooming machine; the 320-type parallel three-screw straw fiber-dividing and fibrillation machine is selected from patent equipment independently developed by Jiangsu family xi and vines biotechnology limited company, and the screw diameter is as follows: 320mm, the rotational speed is: 400r/min, each zone temperature is: one region 50 ℃, two regions 60 ℃, three regions 70 ℃, four regions 80 ℃, five regions 90 ℃, six regions 80 ℃; when the copolymerization modified multi-original mixture is morphologically integrated and has a tough paste state, and simultaneously emits fresh, elegant, coordinated and fine pine needle essential oil fragrance, the completion of the step can be confirmed;
(S3) stirring the copolymerization modified multi-plasma mixture at a controlled temperature, and then adding distiller' S yeast and lactobacillus for anaerobic fermentation to obtain a wine-based active body; the preparation method comprises the steps of putting the copolymerization modified multi-plasma mixture into a temperature-controlled stirrer, controlling the temperature to be 30-40 ℃, controlling the stirring speed to be 150r/min, slowly adding distiller's yeast and plant lactobacillus after the copolymerization modified multi-plasma mixture is fully dispersed, discharging after stirring uniformly, putting the material subjected to strain inoculation into a winding packer, carrying out totally-enclosed packing anaerobic fermentation, and standing at the temperature of: continuous fermentation is carried out on a shading field at 15-20 ℃ for 5-7 d, and when the fermentation bag is inflated and wine with rich pine needle essential oil fragrance overflows, the completion of anaerobic fermentation can be confirmed;
(S4) carrying out vacuum drying separation on the wine-based active body to respectively obtain a wine body and a dried multi-plasma mixture; after opening the wine-based active body package subjected to anaerobic fermentation, putting the fermented wine-based active body into a vacuum rake drying and recycling machine, drying the wine-based active body and synchronously recycling the wine active body, wherein the specific implementation details are as follows:
the wine-based active body is conveyed into a vacuum rake drying and recycling machine (produced by Changzhou drying equipment limited company), the contact surface of the material and the heating shell wall is continuously updated under the stirring of continuously rotating rake teeth, a continuous circulation state is formed in a drying cabin, the heating uniformity is further improved, the vacuum degree in the drying cabin is higher, the steam pressure on the surface of the material is far greater than the evaporation space pressure in the drying cabin, the surface moisture and the wine-based active body are continuously gasified, the air is pumped out of the drying cabin by a vacuum pump, the gasified body is condensed into a liquefied body through a condenser, and the liquefied body can be prepared after filtering, concentrating and purifying, and meanwhile, the moisture of the dried multi-plasma active mixture discharged from the drying cabin is as low as 3%.
In addition, it is worth further explanation that: ethanol is a solvent, in the anaerobic fermentation process of materials, materials containing a large amount of starch and sugar are converted into ethanol due to the function of distiller's yeast and lactobacillus plantarum, the ethanol also alcoholyzes active ingredients in other component materials, the active ingredients are condensed into a wine body along with steam, and meanwhile, a large amount of functional ingredients and a small amount of ethanol exist in the molecular structure of the dried materials, and the dried materials are locked and sealed in the molecular structure of the active body materials after cooling. The mutual synergistic reaction of various raw materials in the anaerobic fermentation material can generate a large amount of free radicals, so that the obtained dry multi-plasma active mixture has good activity and compatibility, and a feasible basic condition is created for the next process implementation of the invention.
(S5) carrying out superfine grinding on the dried active mixture of the mycoplasma, mixing the mixture with polybutylene succinate, sequentially shearing, banburying, melting, reacting, compressing, exhausting, extruding into strips through a die head, cooling at multiple wind points, and granulating to obtain master batches of the mycoplasma particles; the dry multi-plasma active mixture is put into a QLM20 type explosion-proof airflow superfine pulverizer (manufactured by Shandong Jingxin powder equipment Co., ltd.) to be directly subjected to superfine pulverizing, and the equipment can improve and strengthen the uniformity of materials, the bioactivity and the stability of physical and chemical properties after the superfine pulverizing. The material can easily reach the index requirement of 2000 meshes of average grain diameter, and contains a certain amount of micro-nano-diameter powder components; in the process of granulating, an 80-type inverted-Y-shaped three-screw extrusion granulating unit is adopted for granulating; the 80-type inverted-Y-shaped three-screw extrusion granulator set (produced by Beijing Zhongxing brand new plastic mechanical manufacturing Co., ltd.) has the screw diameter of: 80mm, aspect ratio is: 30:1, screw rotation speed is: 400r/min, each zone temperature is: first region 100 ℃, second region 110 ℃, third region 120 ℃, fourth region 125 ℃, fifth region 130 ℃, sixth region 125 ℃, seventh region 120 ℃, eighth region 125 ℃, die temperature 100 ℃, and pressure of each region 0.03MPa; the obtained particle master batch has the following melt index test result: 400g/min, meets the production index requirements of melt blown cloth;
(S6) carrying out melt-blowing on the multi-plasma particle master batch to obtain the pine needle-based long-acting antibacterial and fully-degradable melt-blown fabric; wherein, the melt-blown cloth adopts a melt-blown production line; the melt-blowing production line comprises a feeding machine, a screw extruder, a filtering device, a metering pump, a melt-blowing die, a head assembly, a Roots blower, an air heater, a receiving device and a winding device; the technological parameters of the melt-blowing production line are as follows: one region temperature 106 ℃, two regions temperature 115 ℃, three regions temperature 115 ℃, flange temperature 118 ℃, elbow temperature 118 ℃, die head temperature 116 ℃, screw main frequency 6.15Hz, receiving distance 10cm, hot air temperature 130 ℃, hot air pressure 0.08MPa, roller rotating speed 94m/min and traversing speed 0.6m/min.
The beneficial effects of the invention are as follows:
the pine needle-based long-acting antibacterial and fully degradable melt-blown fabric disclosed by the invention utilizes pine needles as main raw materials to be combined with other natural materials in a compatible way, and after mutual synergistic promotion reaction, the obtained target product also endows the target product with elegant pine needle essential oil fragrance on the basis of the value of a formed special structure and performance, solves the technical problem of how to use the pine needle-based long-acting antibacterial and fully degradable melt-blown fabric as the main raw material of the melt-blown fabric, effectively expands the application field of the pine needle-based melt-blown fabric material, and synchronously realizes the preparation of wine in the process implementation process, so that the pine needle-based long-acting antibacterial and fully degradable melt-blown fabric is obtained at one time. The final target product not only can play a role in guaranteeing the health and safety of people, but also can provide a new strategy and solution for reducing the treatment cost of medical waste and secondary pollution hazard caused by the treatment cost; the antibacterial performance and other comprehensive index detection results show that the melt-blown fabric is superior to the similar products sold in the market in the aspects of antibacterial performance, degradation performance and the like.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims. The raw material amounts of the present invention are shown in Table 1, and the process parameters in step (S3) are shown in Table 2.
Table 1 examples 1 to 3 raw material amounts
Table 2 process parameters
| Process parameters | Example 1 | Example 2 | Example 3 |
| Temperature in temperature-controlled mixer | 30℃ | 40℃ | 35℃ |
| Fermentation temperature | 15℃ | 20℃ | 17℃ |
| Fermentation time | 7d | 5d | 6d |
The invention provides a preparation method of pine needle based long-acting antibacterial and fully degradable melt-blown cloth, which comprises the following steps:
(I) The preparation method of the liquid composite auxiliary agent comprises the following steps:
(1) 100kg of purified water is put into a reaction kettle and heated to 80 ℃ to obtain hot purified water;
(2) And (3) sequentially adding 12kg of sorbitol, 12kg of high fructose corn syrup, 4kg of dodecyl glucoside, 2kg of cocamidopropyl acid sodium, 1.5kg of tea polyphenol, 7.5kg of sodium citrate, 0.5kg of high-temperature amylase and 0.5kg of alkaline high-temperature xylanase into the hot purified water, uniformly stirring, and when the mixed liquid has light green tea taste and strong tea flavor, confirming that the preparation of the liquid composite additive is finished, discharging and cooling for standby.
(II) preparing pine needle based long-acting antibacterial and fully degradable melt-blown cloth, wherein the method comprises the following steps:
the preparation method comprises the steps of (S1) putting pine needles, ginger stalk powder, licorice powder, spicy Liao Fen, seaweed fiber micropowder and mung bean starch into a temperature-controlled stirrer, uniformly stirring at the temperature of 100 ℃ under the condition of 150r/min, adding a liquid compound auxiliary agent, continuously stirring until a small amount of steam appears on the surface of a material, the material has light pleasant pine needle essential oil taste, the surface of the material has light dark green color, a small amount of viscous liquid overflows after the material is clenched by hands, the completion of the steps of saccharification and swelling of the material can be confirmed, and discharging is carried out for standby, so as to obtain a saccharification swelling multi-plasma mixture;
(S2) carrying out yarn splitting and fibrillation on the saccharification swelling mycoplasma mixture, and carrying out shearing, friction, splitting, melting, enzymolysis, liquefaction, plasticization, compression and exhaust on the materials to obtain a copolymerization modified mycoplasma mixture; wherein, the yarn splitting and brooming adopts a 320-type parallel three-screw straw yarn splitting and brooming machine; the screw diameter of the 320-type parallel three-screw straw yarn-separating and fibrillation machine is as follows: 320mm, the rotational speed is: 400r/min, each zone temperature is: one region 50 ℃, two regions 60 ℃, three regions 70 ℃, four regions 80 ℃, five regions 90 ℃, six regions 80 ℃; when the copolymerization modified multi-original mixture is morphologically integrated and is in a paste state with toughness, and simultaneously emits fresh, elegant, coordinated and fine pine needle essential oil fragrance, the completion of the step can be confirmed;
(S3) stirring the copolymerization modified multi-plasma mixture at a controlled temperature, and then adding distiller' S yeast and lactobacillus for anaerobic fermentation to obtain a wine-based active body; the preparation method comprises the steps of putting the copolymerization modified multi-plasma mixture into a temperature-controlled stirrer, controlling the temperature to be 30-40 ℃, controlling the stirring speed to be 150r/min, slowly adding white distiller's yeast and plant lactobacillus after the copolymerization modified multi-plasma mixture is fully dispersed, discharging after stirring uniformly, putting the material subjected to strain inoculation into a winding packer, carrying out totally-enclosed packing anaerobic fermentation, standing the material in a shade field with the temperature of 15-20 ℃ for continuous fermentation for 5-7 d, and confirming that the anaerobic fermentation is completed when the fermentation bag is inflated and has strong pine needle essential oil fragrance wine overflows;
(S4) carrying out vacuum drying separation on the wine-based active body to obtain a wine body and a dried multi-plasma active mixture respectively; after opening the wine-based active body package subjected to anaerobic fermentation, putting the fermented wine-based active body into a vacuum rake drying and recycling machine, drying the wine-based active body and synchronously recycling the wine active body, wherein the specific implementation details are as follows:
the wine-based active body is conveyed into a vacuum rake drying and recycling machine (produced by Changzhou drying equipment limited company), the contact surface of the material and the heating shell wall is continuously updated under the stirring of continuously rotating rake teeth, a continuous circulation state is formed in a drying cabin, the heating uniformity is further improved, the vacuum degree in the drying cabin is higher, the steam pressure on the surface of the material is far greater than the evaporation space pressure in the drying cabin, the surface moisture and the wine-based active body are continuously gasified, the air is pumped out of the drying cabin by a vacuum pump, the gasified body is condensed into a liquefied body by a condenser, and the liquefied body can be prepared after filtering, concentrating and purifying, and meanwhile, the moisture of the dry multi-plasma active mixture discharged from the drying cabin is reduced to 3%.
In addition, it is worth further explanation that: ethanol is a solvent, in the anaerobic fermentation process of materials, materials containing a large amount of starch and sugar are converted into ethanol due to the function of distiller's yeast and lactobacillus plantarum, the ethanol also alcoholyzes active ingredients in other component materials, and the active ingredients are condensed into a wine body along with steam, and meanwhile, a large amount of functional ingredients and a small amount of residual ethanol also exist in the dried materials, and the dried materials are locked and sealed in the molecular structure of the active body materials after cooling. The mutual synergistic reaction of various raw materials in the anaerobic fermentation material can generate a large amount of free radicals, so that the obtained dry multi-plasma active mixture has good activity and compatibility, and a feasible basic condition is created for the next process implementation of the invention.
(S5) carrying out superfine grinding (the water content is 3%) on the dried active mixture of the mycoplasma, mixing the mixture with polybutylene succinate according to the proportion shown in the table 1, sequentially shearing, banburying, melting, reacting, compressing, exhausting, extruding the mixture into strips through a die head, cooling at multiple wind points, and granulating to obtain master batches of the mycoplasma particles; the micronization process is characterized in that the dried active mixture of the mycoplasma is put into an airflow micronizer (manufactured by Shandong Jingxin powder equipment Co., ltd.) to be directly subjected to superfine grinding, and the equipment can improve and strengthen the uniformity, the bioactivity and the stability of the physical and chemical properties of the material after micronization. The material can easily reach the index requirement of 2000 meshes of average grain diameter, and contains a certain amount of micro-nano-diameter powder components; in the granulating process, an 80-type inverted-Y-shaped three-screw extrusion granulating unit is adopted for granulating; the screw diameter of the 80-type inverted-Y-shaped three-screw extrusion granulator set is as follows: 80mm, aspect ratio is: 30:1, screw rotation speed is: 400r/min, each zone temperature is: first region 100 ℃, second region 110 ℃, third region 120 ℃, fourth region 125 ℃, fifth region 130 ℃, sixth region 125 ℃, seventh region 120 ℃, eighth region 125 ℃, die temperature 100 ℃, and pressure of each region 0.03MPa; the melt index test result of the prepared particle master batch is as follows: 400g/min, meets the production index requirements of melt blown cloth;
(S6) carrying out melt-blowing on the multi-plasma particle master batch to obtain the pine needle-based long-acting antibacterial and fully-degradable melt-blown fabric; wherein, the melt-blown cloth adopts a melt-blown production line; the melt-blowing production line comprises a feeding machine, a screw extruder, a filtering device, a metering pump, a melt-blowing die, a head assembly, a Roots blower, an air heater, a receiving device and a winding device; the technological parameters of the melt-blowing production line are as follows: one region temperature 106 ℃, two regions temperature 115 ℃, three regions temperature 115 ℃, flange temperature 118 ℃, elbow temperature 118 ℃, die head temperature 116 ℃, screw main frequency 6.15Hz, receiving distance 10cm, hot air temperature 130 ℃, hot air pressure 0.08MPa, roller rotating speed 94m/min and traversing speed 0.6m/min.
The values to be explained in one step are: the inventor can prepare the qualified melt-blown cloth finished product by carrying out practical operation on different types of melt-blown cloth types, and only proper melt-blown cloth forming system is regulated on corresponding equipment, because the melt index of the prepared particle master batch is suitable for melt-blown cloth of any model.
To demonstrate the antimicrobial properties of the meltblown webs of the present invention, examples 1-3 and commercial like products were tested as follows:
principle of: two layers of agar culture medium are injected into the plate, wherein the lower layer is sterile culture medium, and the upper layer is inoculation culture medium. The test sample is placed on two layers of culture mediums, after the culture is carried out for a certain time, the antibacterial performance of the test sample is qualitatively assessed according to the bacterial reproduction degree at the contact position of the culture mediums and the test sample.
Test bacteria: the following gram-positive and one of the gram-negative bacteria should be used.
(i) Staphylococcus aureus (gram positive);
(ii) Klebsiella pneumoniae (gram negative);
(iii) Coli (gram negative).
The antibacterial effect was evaluated as shown in table 3, and the results are shown in table 4.
TABLE 3 evaluation of antibacterial effect
TABLE 4 antibacterial results
| Group of | Example 1 | Example 2 | Example 3 | Commercial like products |
| Antibacterial effect | Has good effect | Has good effect | Has good effect | Has limited effect |
As can be seen from Table 4, the antibacterial properties of examples 1 to 3 of the present invention are significantly better than those of the commercial products of the same type.
The invention relates to a long-acting antibacterial principle of pine needle based long-acting antibacterial and fully degradable melt-blown cloth, which comprises the following steps:
the long-acting antibacterial performance of the pine needle based melt-blown fabric is mainly expressed in the antibacterial effect caused by the slow release effect of a large number of natural antibacterial agents contained in the raw material formula, and the confirmation of the antibacterial effect of the invention is not single, and is an excellent effect from the synergistic effect of three aspects, because the target product of the invention has natural factors of long-acting antibacterial and mildew killing:
1. the pine needle essential oil, gingerol, glycyrrhizin, tea polyphenol, sodium alginate and the like contained in the raw material formula of the melt-blown cloth prepared by the invention are known natural antibacterial agents, are still in the fiber structure of a target product after being treated by the steps of liquefying, fermenting, micro-powder, granulating and melt-blowing in the process implementation, and are released for a long time along with the application of the melt-blown cloth of the invention, so that the long-acting antibacterial performance is achieved.
2. The ethanol component of the wine body prepared synchronously is blocked in the fiber molecular structure of the target product for a long time to be slowly released, so that the long-acting antibacterial effect is achieved.
3. The melt-blown cloth prepared by the invention is composed of a large number of amorphous cellulose, lignin, polyphenol, polypeptide, a large number of natural antibacterial agents and other substances and small molecules, and is in a complex space three-dimensional net-shaped loose structure, and the special structure enables the melt-blown cloth to be rich in oxygen and to have excellent hygroscopicity and air permeability, so that under the moist condition, the metabolic action and physiological activity of living and propagating anaerobic mould (staphylococcus aureus, escherichia coli, pseudomonas aeruginosa and candida albicans) are inhibited and difficult to survive, thereby achieving the function of long-acting bacteriostasis.
To demonstrate the degradability of the meltblown webs of the present invention, examples 1-3 and commercial like products were tested as follows:
the test principle is as follows: and (3) degrading the sample in the soil fungus suspension under the action of microorganisms, and after a certain period of time, determining the biodegradability of the sample by determining the percentage of the accumulated inorganic carbon release amount of the sample to the original total organic carbon content.
Soil for test: taking a fertile soil sample, removing surface soil at a sampling place by using a small shovel, taking loose soil 10-15 cm deep from the ground, removing obvious plant-based materials, stones and other inert materials, sieving the soil by using a screen (10 meshes) to obtain soil particles with the size smaller than 2mm, placing the soil particles into a bag subjected to sterilization treatment, sealing, placing the bag into a refrigerator at the temperature of 2-8 ℃ for refrigeration for standby, and recording sampling time, place, weather conditions and the like.
Sample size: sampling is carried out in the area which is more than 100mm away from the melt-blown cloth edge, and the parts with folds, stains and flaws are avoided. The sample was cut into small pieces of about 5mm by 5mm and mixed.
Biodegradable rate: η= (a tic ÷A tc )×100％
Wherein:
η: a biodegradability;
A tic : the total inorganic carbon produced by degrading the sample under the action of microorganism accounts for the mass percent of the sample and is%
A tc : mass fraction of organic carbon in sample,%
Biodegradability evaluation: when the biodegradability eta of the sample reaches 60% or more in the test time of 90 days, the sample is considered to be biodegradable.
The results of the biodegradability test are shown in Table 5.
TABLE 5 biodegradable results
| Group of | Example 1 | Example 2 | Example 3 | Commercial like products |
| η | 93.4％ | 91.7％ | 95.1％ | 47.8％ |
From Table 5, it is clear that the degradation properties of examples 1 to 3 of the present invention are significantly better than those of the commercially available products of the same type. In addition, it is clearly recognized from the formulation of the process for preparing the target product of the present invention that none of the raw materials contains petroleum-based components or other components that are incapable of forming carbohydrates in the soil. It was confirmed that the target product of the present invention was excellent in degradation performance.
In conclusion, the pine needle based long-acting antibacterial and fully degradable melt-blown cloth prepared by the method is a fully degradable material.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. The pine needle-based long-acting antibacterial and full-degradable melt-blown cloth is characterized by comprising the following raw materials in parts by weight: liquid composite auxiliary agent: 60-100 parts of pine needles: 28-40 parts of ginger stalk powder: 3-5 parts of licorice powder: 3-5 parts of spicy Liao Fen: 1-5 parts of alginate fiber micropowder: 3-5 parts of mung bean starch: 13-30 parts of distiller's yeast: 1-4 parts of lactobacillus: 1-6 parts of poly (butylene succinate): 60-100 parts;
the liquid composite additive comprises the following raw materials in parts by weight: purified water: 100 parts of sorbitol: 12 parts of high fructose corn syrup: 12 parts of dodecyl glucoside: 4 parts of cocamidopropyl acid sodium carbonate: 2 parts of tea polyphenol: 1.5 parts of sodium citrate: 7.5 parts of high temperature amylase: 0.5 parts of alkaline high temperature xylanase: 0.5 parts;
the preparation method of the pine needle based long-acting antibacterial and fully degradable melt-blown fabric comprises the following steps:
(S1) carrying out temperature control stirring on pine needles, ginger stalk powder, licorice powder, spicy Liao Fen, seaweed fiber micropowder and mung bean starch, then adding a liquid compound auxiliary agent, and continuously and uniformly stirring to obtain a saccharification swelling multi-plasma mixture;
(S2) carrying out yarn splitting and fibrillation on the saccharification swelling mycoplasma mixture, and carrying out shearing, friction, splitting, melting, enzymolysis, liquefaction, plasticization, compression and exhaust on the materials to obtain a copolymerization modified mycoplasma mixture; wherein, the yarn splitting and brooming adopts a 320-type parallel three-screw straw yarn splitting and brooming machine; the screw diameter of the 320-type parallel three-screw straw yarn-separating and fibrillation machine is as follows: 320mm, the rotational speed is: 400r/min, each zone temperature is: one region 50 ℃, two regions 60 ℃, three regions 70 ℃, four regions 80 ℃, five regions 90 ℃, six regions 80 ℃;
(S3) stirring the copolymerization modified multi-plasma mixture at a controlled temperature, and then adding distiller' S yeast and lactobacillus for anaerobic fermentation to obtain a wine-based active body; wherein, the temperature of accuse temperature is: the stirring speed is 30-40 ℃, and the stirring speed is: 150r/min; the anaerobic fermentation temperature is as follows: 15-20 ℃ and the time is as follows: 5-7 d;
(S4) carrying out vacuum drying separation on the wine-based active body to obtain a wine body and a dried multi-plasma mixture respectively;
(S5) carrying out superfine grinding on the dried mycoplasma mixture, mixing with polybutylene succinate, sequentially shearing, banburying, melting, reacting, compressing, exhausting, extruding into strips through a die head, cooling at multiple wind points, and granulating to obtain a mycoplasma particle master batch; wherein, the grain cutting adopts an 80-type inverted-Y-shaped three-screw extrusion granulator set; the screw diameter of the 80-type inverted-Y-shaped three-screw extrusion granulator set is as follows: 80mm, aspect ratio is: 30:1, screw rotation speed is: 400r/min, each zone temperature is: one zone of 100 ℃, two zones of 110 ℃, three zones of 120 ℃, four zones of 125 ℃, five zones of 130 ℃, six zones of 125 ℃, seven zones of 120 ℃, eight zones of 125 ℃, die temperature of 100 ℃, and pressure of each zone are as follows: 0.03MPa;
(S6) carrying out melt-blowing on the multi-plasma particle master batch to obtain the pine needle-based long-acting antibacterial and fully-degradable melt-blown fabric; wherein, the melt-blown cloth adopts a melt-blown production line; the melt-blowing production line comprises a feeding machine, a screw extruder, a filtering device, a metering pump, a melt-blowing die, a head assembly, a Roots blower, an air heater, a receiving device and a winding device; the technological parameters of the melt-blowing production line are as follows: one region temperature 106 ℃, two regions temperature 115 ℃, three regions temperature 115 ℃, flange temperature 118 ℃, elbow temperature 118 ℃, die head temperature 116 ℃, screw main frequency 6.15Hz, receiving distance 10cm, hot air temperature 130 ℃, hot air pressure 0.08MPa, roller rotating speed 94m/min and traversing speed 0.6m/min.
2. The pine needle based long-acting antibacterial and fully degradable melt blown cloth according to claim 1, which is characterized by comprising the following raw materials in parts by weight: liquid composite auxiliary agent: 80 parts of pine needles: 34 parts of ginger straw powder: 4 parts of licorice powder: 4 parts of spicy Liao Fen: 3 parts of alginate fiber micropowder: 4 parts of mung bean starch: 22 parts of distiller's yeast: 2.5 parts of lactic acid bacteria: 3.5 parts of polybutylene succinate: 80 parts.
3. The pine needle based long-acting antibacterial and fully degradable meltblown fabric of claim 1, wherein the method for preparing the liquid composite adjuvant comprises the following steps:
(1) Heating the purified water to a constant temperature to obtain hot purified water;
(2) And (3) sequentially adding sorbitol, high fructose syrup, dodecyl glucoside, cocamidopropyl acid sodium, tea polyphenol, sodium citrate, high temperature amylase and alkaline high temperature xylanase into the hot purified water, and uniformly stirring to obtain the liquid composite additive.
4. A pine needle based long acting bacteriostatic, fully degradable meltblown according to claim 3, wherein said heating is to a constant temperature: 80 ℃, the rotation speed of stirring is as follows: 150r/min.
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