CN112853604A - Non-woven fabric fiber material for medical and health protection and production process thereof - Google Patents
Non-woven fabric fiber material for medical and health protection and production process thereof Download PDFInfo
- Publication number
- CN112853604A CN112853604A CN202011606474.2A CN202011606474A CN112853604A CN 112853604 A CN112853604 A CN 112853604A CN 202011606474 A CN202011606474 A CN 202011606474A CN 112853604 A CN112853604 A CN 112853604A
- Authority
- CN
- China
- Prior art keywords
- coral
- coral powder
- powder
- solution
- woven fabric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
-
- 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
-
- 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
-
- 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
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/02—Moisture-responsive characteristics
- D10B2401/022—Moisture-responsive characteristics hydrophylic
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/13—Physical properties anti-allergenic or anti-bacterial
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2509/00—Medical; Hygiene
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Professional, Industrial, Or Sporting Protective Garments (AREA)
Abstract
The invention relates to a non-woven fabric fiber material for medical and health protection and a production process thereof, wherein the non-woven fabric fiber material is modified polypropylene fiber; the modified polypropylene fiber is obtained by modifying polypropylene with surface functional coral powder, and the mass ratio of the surface functional coral powder to the polypropylene is 1: 15-35; the preparation method of the surface functional coral powder comprises the following steps: step 1, grinding coral sand into fine coral powder, and performing amination treatment on the fine coral powder to obtain coral powder amino-treated matter; and 2, performing grafting reaction on the coral powder amino-treated substance and luteolin to obtain the surface functional coral powder. The invention prepares and synthesizes the modified polypropylene fiber with stronger hygroscopicity and antibacterial property by carrying out hydrophilic modification on the hydrophobic polypropylene fiber.
Description
Technical Field
The invention relates to the field of medical protection, in particular to a non-woven fabric fiber material for medical and health protection and a production process thereof.
Background
Nonwoven fabrics have excellent air permeability, flexibility and hygiene, and are widely used for manufacturing medical and hygienic products. The medical and sanitary articles made of the non-woven fabrics comprise protective operating gowns, protective clothing, patient clothing, cloth for disinfection and bandaging, various wet tissues, protective and sanitary masks, medical bed sheets, curtains and the like, and also comprise external correction bandages, surgical operating towels and the like. Most raw materials for preparing the non-woven fabric are polypropylene, different from polyethylene which is a raw material of a plastic bag, a chemical molecular structure has quite strong stability and is extremely difficult to degrade, so the plastic bag can be completely decomposed in 300 years, the chemical structure of the polypropylene is not stable enough, molecular chains are easy to break, and the polypropylene can be effectively degraded quickly, a non-woven fabric product is placed outdoors to be naturally decomposed for only 90 days at most, and is combusted after being discarded, so the non-woven fabric product is non-toxic, tasteless, free of any residual substance, and has the pollution degree to the environment of only 10 percent of that of the plastic bag, and is an internationally recognized environment-friendly product. However, the existing polypropylene has the defect that the hygroscopicity and the antibacterial property are not good, and the use requirements of various products in the special industry of medical and health products are difficult to meet.
Disclosure of Invention
Aiming at the problems, the invention provides a non-woven fabric fiber material for medical health protection and a production process thereof. The non-woven fabric fiber material prepared by the invention has excellent moisture absorption characteristic and slow-release antibacterial effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a nonwoven fabric fiber material for medical hygiene protection, wherein the nonwoven fabric fiber material is a modified polypropylene fiber.
Preferably, the modified polypropylene fiber is obtained by modifying polypropylene with surface-functional coral powder, and the mass ratio of the surface-functional coral powder to the polypropylene is 1: 15-35.
Preferably, the diameter of the modified polypropylene fiber is 5-50 μm.
Preferably, the preparation method of the surface functional coral powder comprises the following steps:
step 1, grinding coral sand into fine coral powder, and performing amination treatment on the fine coral powder to obtain coral powder amino-treated matter;
and 2, performing grafting reaction on the coral powder amino-treated substance and luteolin to obtain the surface functional coral powder.
Preferably, in the step 1, the coral sand is ground to obtain 1-100 μm coarse coral powder, and then ground to 10-50 nm fine coral powder.
Preferably, in the step 1, spermidine trihydrochloride is used for amination treatment of the coral powder.
Preferably, in the step 2, the coral powder amino-treated substance is firstly reacted with 2-bromoisobutyryl bromide, and the obtained product is then grafted with luteolin.
Preferably, the step 1 specifically comprises:
s1, coarse grinding coral sand to form coarse coral powder with the particle size of 1-100 microns, and then grinding the coarse coral powder by using a nano grinder to form fine coral powder with the particle size of 10-50 nm;
s2, putting the coral fine powder into distilled water, then dropwise adding gamma-aminopropyl triethoxysilane, and carrying out ultrasonic treatment for 0.5-2 h at room temperature to obtain a coral fine powder mixed solution; adding spermidine trihydrochloride into distilled water, and stirring until the spermidine trihydrochloride is completely dissolved to obtain a spermidine trihydrochloride solution;
wherein in the coral fine powder mixed solution, the mass ratio of the coral fine powder, the gamma-aminopropyltriethoxysilane and the distilled water is 1: 0.05-0.1: 12-15; in the spermidine trihydrochloride solution, the mass ratio of spermidine trihydrochloride to distilled water is 1: 6-10;
s3, heating the coral fine powder mixed solution to 50-70 ℃, stirring at a speed of 200-400 rpm, dropwise adding a spermidine trihydrochloride solution, continuously reacting for 2-5 hours after completely dropwise adding, filtering and collecting solids after the reaction solution is cooled to room temperature, washing the solids with purified water for 3-5 times, and then placing the solids in a drying box at 80-100 ℃ for treatment to constant weight to obtain a coral powder amino-treated substance;
wherein the mass ratio of the spermidine trihydrochloride solution to the coral fine powder mixed solution is 1: 2-4.
Preferably, the step 2 specifically comprises:
s1, adding the coral powder amino treatment substance into cyclohexanone, and dispersing uniformly in an ultrasonic mode to obtain a coral powder amino treatment mixed solution; adding luteolin into a sodium hydroxide solution with the mass fraction of 1-5%, and stirring until the luteolin is completely dissolved to obtain a luteolin solution;
wherein the mass ratio of the coral powder amino treatment product to cyclohexanone is 1: 5-12; the mass ratio of the luteolin to the sodium hydroxide solution is 1: 8-15;
s2, adding triethylamine and 4-dimethylaminopyridine into the coral powder amino treatment mixed solution, uniformly mixing, placing the mixture in an ice water bath, stirring for 0.5-1 h, then under the protection of inert gas, stirring at the speed of 100-200 rpm while dropwise adding 2-bromoisobutyryl bromide, removing the ice water bath after dropwise adding is finished, and continuously stirring and reacting for 2-5 h at room temperature to obtain a coral powder bromine end group treatment solution;
wherein the mass ratio of the 2-bromoisobutyryl bromide to the mixed liquid of triethylamine to the 4-dimethylaminopyridine to the coral powder amino treatment is 1: 0.8-0.12: 0.03-0.05: 10-15;
s3, adding the luteolin solution into the coral powder bromine end group treatment liquid, stirring uniformly, heating to 100-120 ℃ under the protection of inert gas, reacting for 3-6 h under the condition of condensation reflux, filtering and collecting a solid product after the reaction liquid is cooled to room temperature, washing the solid product with purified water until the washing liquid is neutral, then washing with absolute ethyl alcohol for 3-5 times, and then placing in a drying box for treatment to constant weight to obtain the surface functional coral powder;
wherein the mass ratio of the luteolin solution to the coral powder bromine end group treatment solution is 1: 2-4.
In a second aspect, the present invention provides a process for producing a nonwoven fibrous material for medical hygiene protection, comprising the steps of:
(1) weighing the polypropylene, adding the polypropylene into xylene, heating to 120-130 ℃, and continuously stirring until the polypropylene is completely dissolved to obtain a polypropylene solution;
(2) adding the surface functional coral powder into a polypropylene solution, dispersing until the surface functional coral powder is uniform, heating to 140-160 ℃, and continuously stirring for 0.5-2 hours to obtain a modified polypropylene mixed solution;
(3) distilling the modified polypropylene mixed solution under reduced pressure to remove the solvent, and then placing the modified polypropylene mixed solution in a drying oven with an air draft system for drying treatment to obtain a modified polypropylene composite material;
(4) heating the obtained modified polypropylene composite material to a molten state, and then extruding and granulating to obtain modified polypropylene master batches;
(5) carrying out melt spinning, winding and hot drawing on the obtained modified polypropylene master batch to obtain modified polypropylene fibers;
(6) and (3) sending the modified polypropylene fiber into an opener, and opening and carding to form a non-woven fabric fiber net to obtain the non-woven fabric fiber material for medical and health protection.
Preferably, in the step (1), the mass ratio of the polypropylene to the xylene is 1: 12-20.
Preferably, in the steps (1) and (2), the stirring speed is 500-1000 rpm.
Preferably, in the step (3), the temperature of the oven is set to be 60-80 ℃, and the drying time is 12-24 hours.
Preferably, in the step (4), the temperature of the heated molten state is 170-200 ℃.
Preferably, in the step (5), the temperature of the melt spinning is 200-250 ℃.
Preferably, the non-woven fabric fiber material for medical health protection is applied to the manufacture of medical protective clothing, medical wound dressing and surgical articles.
The invention has the beneficial effects that:
1. the polypropylene fiber has the advantages of light weight, high strength, good elasticity, heat preservation, wear resistance and corrosion resistance, but has the defect that the hygroscopicity and the antibacterial property are not good. The invention prepares and synthesizes the modified polypropylene fiber with stronger hygroscopicity and antibacterial property by carrying out hydrophilic modification on the hydrophobic polypropylene fiber.
2. In the process of modifying the polypropylene fiber, coral sand is used as a base material of a modifier, the coral sand is natural coral or shell fragments and has a rich pore structure, and the pore structure has the function of absorbing active substances and water. Specifically, the coral sand is firstly ground into nano particles, and then the coral sand nano powder is subjected to amino grafting modification by using the spermidine trihydrochloride with rich amino groups, and the coral sand has certain alkalinity, so that the coral sand can be better crosslinked with the spermidine trihydrochloride in an alkaline environment, and the obtained coral powder amino treatment substance contains rich and firm amino groups. According to the invention, triethylamine is used as an acid-binding agent, 4-dimethylaminopyridine is used as a catalyst, 2-bromoisobutyryl bromide reacts with amino groups on coral powder amino treatment substances, the amino groups are converted to generate active nitrogen-containing bromine end groups, and then luteolin containing abundant hydroxyl groups is combined with the bromine end groups to generate a stable functional group structure, so that the luteolin is grafted on the surface of the coral powder, and finally the surface functional coral powder is obtained.
3. Because the functional group formed by the luteolin and the nitrogenous bromine end group is stable, the luteolin can be stably grafted on the surface of the coral powder, and the luteolin has antibacterial property and the hydroxyl on the surface of the luteolin has certain hydrophilicity, so that the hydrophilicity and the antibacterial property of the coral powder can be improved, and the hydrophilicity and the antibacterial property of the finally prepared modified polypropylene are greatly enhanced. Further, since the surface-functional coral powder contains a large amount of organic functional groups therein, it has a good fusibility with polypropylene.
Detailed Description
The invention is further described with reference to the following examples.
Example 1
A non-woven fabric fiber material for medical and health protection is disclosed, wherein the non-woven fabric fiber material is modified polypropylene fiber.
The modified polypropylene fiber is obtained by modifying polypropylene with surface functional coral powder, and the mass ratio of the surface functional coral powder to the polypropylene is 1: 20.
The diameter of the modified polypropylene fiber is 5-50 μm.
The preparation method of the surface functional coral powder comprises the following steps:
step 1, grinding coral sand into fine coral powder, and performing amination treatment on the fine coral powder to obtain coral powder amino-treated matter;
and 2, performing grafting reaction on the coral powder amino-treated substance and luteolin to obtain the surface functional coral powder.
In the step 1, the coral sand is ground into 1-100 μm coarse coral powder, and then ground into 10-50 nm fine coral powder.
In the step 1, spermidine trihydrochloride is used for amination treatment of the coral powder.
In the step 2, the coral powder amino-treated substance reacts with 2-bromoisobutyryl bromide to obtain a product, and then the product is subjected to a grafting reaction with luteolin.
The step 1 specifically comprises the following steps:
s1, coarse grinding coral sand to form coarse coral powder with the particle size of 1-100 microns, and then grinding the coarse coral powder by using a nano grinder to form fine coral powder with the particle size of 10-50 nm;
s2, putting the coral fine powder into distilled water, then dropwise adding gamma-aminopropyl triethoxysilane, and carrying out ultrasonic treatment for 0.5-2 h at room temperature to obtain a coral fine powder mixed solution; adding spermidine trihydrochloride into distilled water, and stirring until the spermidine trihydrochloride is completely dissolved to obtain a spermidine trihydrochloride solution;
wherein in the coral fine powder mixed solution, the mass ratio of the coral fine powder, the gamma-aminopropyltriethoxysilane and the distilled water is 1: 0.05-0.1: 12-15; in the spermidine trihydrochloride solution, the mass ratio of spermidine trihydrochloride to distilled water is 1: 6-10;
s3, heating the coral fine powder mixed solution to 50-70 ℃, stirring at a speed of 200-400 rpm, dropwise adding a spermidine trihydrochloride solution, continuously reacting for 2-5 hours after completely dropwise adding, filtering and collecting solids after the reaction solution is cooled to room temperature, washing the solids with purified water for 3-5 times, and then placing the solids in a drying box at 80-100 ℃ for treatment to constant weight to obtain a coral powder amino-treated substance;
wherein the mass ratio of the spermidine trihydrochloride solution to the coral fine powder mixed solution is 1: 2-4.
The step 2 specifically comprises the following steps:
s1, adding the coral powder amino treatment substance into cyclohexanone, and dispersing uniformly in an ultrasonic mode to obtain a coral powder amino treatment mixed solution; adding luteolin into a sodium hydroxide solution with the mass fraction of 1-5%, and stirring until the luteolin is completely dissolved to obtain a luteolin solution;
wherein the mass ratio of the coral powder amino treatment product to cyclohexanone is 1: 5-12; the mass ratio of the luteolin to the sodium hydroxide solution is 1: 8-15;
s2, adding triethylamine and 4-dimethylaminopyridine into the coral powder amino treatment mixed solution, uniformly mixing, placing the mixture in an ice water bath, stirring for 0.5-1 h, then under the protection of inert gas, stirring at the speed of 100-200 rpm while dropwise adding 2-bromoisobutyryl bromide, removing the ice water bath after dropwise adding is finished, and continuously stirring and reacting for 2-5 h at room temperature to obtain a coral powder bromine end group treatment solution;
wherein the mass ratio of the 2-bromoisobutyryl bromide to the mixed liquid of triethylamine to the 4-dimethylaminopyridine to the coral powder amino treatment is 1: 0.8-0.12: 0.03-0.05: 10-15;
s3, adding the luteolin solution into the coral powder bromine end group treatment liquid, stirring uniformly, heating to 100-120 ℃ under the protection of inert gas, reacting for 3-6 h under the condition of condensation reflux, filtering and collecting a solid product after the reaction liquid is cooled to room temperature, washing the solid product with purified water until the washing liquid is neutral, then washing with absolute ethyl alcohol for 3-5 times, and then placing in a drying box for treatment to constant weight to obtain the surface functional coral powder;
wherein the mass ratio of the luteolin solution to the coral powder bromine end group treatment solution is 1: 2-4.
The production process of the non-woven fabric fiber material for medical and health protection comprises the following steps:
(1) weighing the polypropylene, adding the polypropylene into xylene, heating to 120-130 ℃, and continuously stirring until the polypropylene is completely dissolved to obtain a polypropylene solution;
(2) adding the surface functional coral powder into a polypropylene solution, dispersing until the surface functional coral powder is uniform, heating to 140-160 ℃, and continuously stirring for 0.5-2 hours to obtain a modified polypropylene mixed solution;
(3) distilling the modified polypropylene mixed solution under reduced pressure to remove the solvent, and then placing the modified polypropylene mixed solution in a drying oven with an air draft system for drying treatment to obtain a modified polypropylene composite material;
(4) heating the obtained modified polypropylene composite material to a molten state, and then extruding and granulating to obtain modified polypropylene master batches;
(5) carrying out melt spinning, winding and hot drawing on the obtained modified polypropylene master batch to obtain modified polypropylene fibers;
(6) and (3) sending the modified polypropylene fiber into an opener, and opening and carding to form a non-woven fabric fiber net to obtain the non-woven fabric fiber material for medical and health protection.
In the step (1), the mass ratio of the polypropylene to the xylene is 1: 12-20.
In the steps (1) and (2), the stirring speed is 500-1000 rpm.
In the step (3), the temperature of the oven is set to be 60-80 ℃, and the drying time is 12-24 hours.
In the step (4), the temperature is increased to a molten state and is 170-200 ℃.
In the step (5), the temperature of the melt spinning is 200-250 ℃.
The non-woven fabric fiber material for medical and health protection is applied to the manufacture of medical protective clothing, medical wound dressing and surgical articles.
Example 2
A non-woven fabric fiber material for medical and health protection is disclosed, wherein the non-woven fabric fiber material is modified polypropylene fiber.
The modified polypropylene fiber is obtained by modifying polypropylene with surface functional coral powder, and the mass ratio of the surface functional coral powder to the polypropylene is 1: 15.
The diameter of the modified polypropylene fiber is 5-50 μm.
The preparation method of the surface functional coral powder comprises the following steps:
step 1, grinding coral sand into fine coral powder, and performing amination treatment on the fine coral powder to obtain coral powder amino-treated matter;
and 2, performing grafting reaction on the coral powder amino-treated substance and luteolin to obtain the surface functional coral powder.
In the step 1, the coral sand is ground into 1-100 μm coarse coral powder, and then ground into 10-50 nm fine coral powder.
In the step 1, spermidine trihydrochloride is used for amination treatment of the coral powder.
In the step 2, the coral powder amino-treated substance reacts with 2-bromoisobutyryl bromide to obtain a product, and then the product is subjected to a grafting reaction with luteolin.
The step 1 specifically comprises the following steps:
s1, coarse grinding coral sand to form coarse coral powder with the particle size of 1-100 microns, and then grinding the coarse coral powder by using a nano grinder to form fine coral powder with the particle size of 10-50 nm;
s2, putting the coral fine powder into distilled water, then dropwise adding gamma-aminopropyl triethoxysilane, and carrying out ultrasonic treatment for 0.5-2 h at room temperature to obtain a coral fine powder mixed solution; adding spermidine trihydrochloride into distilled water, and stirring until the spermidine trihydrochloride is completely dissolved to obtain a spermidine trihydrochloride solution;
wherein in the coral fine powder mixed solution, the mass ratio of the coral fine powder, the gamma-aminopropyltriethoxysilane and the distilled water is 1: 0.05-0.1: 12-15; in the spermidine trihydrochloride solution, the mass ratio of spermidine trihydrochloride to distilled water is 1: 6-10;
s3, heating the coral fine powder mixed solution to 50-70 ℃, stirring at a speed of 200-400 rpm, dropwise adding a spermidine trihydrochloride solution, continuously reacting for 2-5 hours after completely dropwise adding, filtering and collecting solids after the reaction solution is cooled to room temperature, washing the solids with purified water for 3-5 times, and then placing the solids in a drying box at 80-100 ℃ for treatment to constant weight to obtain a coral powder amino-treated substance;
wherein the mass ratio of the spermidine trihydrochloride solution to the coral fine powder mixed solution is 1: 2-4.
The step 2 specifically comprises the following steps:
s1, adding the coral powder amino treatment substance into cyclohexanone, and dispersing uniformly in an ultrasonic mode to obtain a coral powder amino treatment mixed solution; adding luteolin into a sodium hydroxide solution with the mass fraction of 1-5%, and stirring until the luteolin is completely dissolved to obtain a luteolin solution;
wherein the mass ratio of the coral powder amino treatment product to cyclohexanone is 1: 5-12; the mass ratio of the luteolin to the sodium hydroxide solution is 1: 8-15;
s2, adding triethylamine and 4-dimethylaminopyridine into the coral powder amino treatment mixed solution, uniformly mixing, placing the mixture in an ice water bath, stirring for 0.5-1 h, then under the protection of inert gas, stirring at the speed of 100-200 rpm while dropwise adding 2-bromoisobutyryl bromide, removing the ice water bath after dropwise adding is finished, and continuously stirring and reacting for 2-5 h at room temperature to obtain a coral powder bromine end group treatment solution;
wherein the mass ratio of the 2-bromoisobutyryl bromide to the mixed liquid of triethylamine to the 4-dimethylaminopyridine to the coral powder amino treatment is 1: 0.8-0.12: 0.03-0.05: 10-15;
s3, adding the luteolin solution into the coral powder bromine end group treatment liquid, stirring uniformly, heating to 100-120 ℃ under the protection of inert gas, reacting for 3-6 h under the condition of condensation reflux, filtering and collecting a solid product after the reaction liquid is cooled to room temperature, washing the solid product with purified water until the washing liquid is neutral, then washing with absolute ethyl alcohol for 3-5 times, and then placing in a drying box for treatment to constant weight to obtain the surface functional coral powder;
wherein the mass ratio of the luteolin solution to the coral powder bromine end group treatment solution is 1: 2-4.
The production process of the non-woven fabric fiber material for medical and health protection comprises the following steps:
(1) weighing the polypropylene, adding the polypropylene into xylene, heating to 120-130 ℃, and continuously stirring until the polypropylene is completely dissolved to obtain a polypropylene solution;
(2) adding the surface functional coral powder into a polypropylene solution, dispersing until the surface functional coral powder is uniform, heating to 140-160 ℃, and continuously stirring for 0.5-2 hours to obtain a modified polypropylene mixed solution;
(3) distilling the modified polypropylene mixed solution under reduced pressure to remove the solvent, and then placing the modified polypropylene mixed solution in a drying oven with an air draft system for drying treatment to obtain a modified polypropylene composite material;
(4) heating the obtained modified polypropylene composite material to a molten state, and then extruding and granulating to obtain modified polypropylene master batches;
(5) carrying out melt spinning, winding and hot drawing on the obtained modified polypropylene master batch to obtain modified polypropylene fibers;
(6) and (3) sending the modified polypropylene fiber into an opener, and opening and carding to form a non-woven fabric fiber net to obtain the non-woven fabric fiber material for medical and health protection.
In the step (1), the mass ratio of the polypropylene to the xylene is 1: 12-20.
In the steps (1) and (2), the stirring speed is 500-1000 rpm.
In the step (3), the temperature of the oven is set to be 60-80 ℃, and the drying time is 12-24 hours.
In the step (4), the temperature is increased to a molten state and is 170-200 ℃.
In the step (5), the temperature of the melt spinning is 200-250 ℃.
The non-woven fabric fiber material for medical and health protection is applied to the manufacture of medical protective clothing, medical wound dressing and surgical articles.
Example 3
A non-woven fabric fiber material for medical and health protection is disclosed, wherein the non-woven fabric fiber material is modified polypropylene fiber.
The modified polypropylene fiber is obtained by modifying polypropylene with surface functional coral powder, and the mass ratio of the surface functional coral powder to the polypropylene is 1: 35.
The diameter of the modified polypropylene fiber is 5-50 μm.
The preparation method of the surface functional coral powder comprises the following steps:
step 1, grinding coral sand into fine coral powder, and performing amination treatment on the fine coral powder to obtain coral powder amino-treated matter;
and 2, performing grafting reaction on the coral powder amino-treated substance and luteolin to obtain the surface functional coral powder.
In the step 1, the coral sand is ground into 1-100 μm coarse coral powder, and then ground into 10-50 nm fine coral powder.
In the step 1, spermidine trihydrochloride is used for amination treatment of the coral powder.
In the step 2, the coral powder amino-treated substance reacts with 2-bromoisobutyryl bromide to obtain a product, and then the product is subjected to a grafting reaction with luteolin.
The step 1 specifically comprises the following steps:
s1, coarse grinding coral sand to form coarse coral powder with the particle size of 1-100 microns, and then grinding the coarse coral powder by using a nano grinder to form fine coral powder with the particle size of 10-50 nm;
s2, putting the coral fine powder into distilled water, then dropwise adding gamma-aminopropyl triethoxysilane, and carrying out ultrasonic treatment for 0.5-2 h at room temperature to obtain a coral fine powder mixed solution; adding spermidine trihydrochloride into distilled water, and stirring until the spermidine trihydrochloride is completely dissolved to obtain a spermidine trihydrochloride solution;
wherein in the coral fine powder mixed solution, the mass ratio of the coral fine powder, the gamma-aminopropyltriethoxysilane and the distilled water is 1: 0.05-0.1: 12-15; in the spermidine trihydrochloride solution, the mass ratio of spermidine trihydrochloride to distilled water is 1: 6-10;
s3, heating the coral fine powder mixed solution to 50-70 ℃, stirring at a speed of 200-400 rpm, dropwise adding a spermidine trihydrochloride solution, continuously reacting for 2-5 hours after completely dropwise adding, filtering and collecting solids after the reaction solution is cooled to room temperature, washing the solids with purified water for 3-5 times, and then placing the solids in a drying box at 80-100 ℃ for treatment to constant weight to obtain a coral powder amino-treated substance;
wherein the mass ratio of the spermidine trihydrochloride solution to the coral fine powder mixed solution is 1: 2-4.
The step 2 specifically comprises the following steps:
s1, adding the coral powder amino treatment substance into cyclohexanone, and dispersing uniformly in an ultrasonic mode to obtain a coral powder amino treatment mixed solution; adding luteolin into a sodium hydroxide solution with the mass fraction of 1-5%, and stirring until the luteolin is completely dissolved to obtain a luteolin solution;
wherein the mass ratio of the coral powder amino treatment product to cyclohexanone is 1: 5-12; the mass ratio of the luteolin to the sodium hydroxide solution is 1: 8-15;
s2, adding triethylamine and 4-dimethylaminopyridine into the coral powder amino treatment mixed solution, uniformly mixing, placing the mixture in an ice water bath, stirring for 0.5-1 h, then under the protection of inert gas, stirring at the speed of 100-200 rpm while dropwise adding 2-bromoisobutyryl bromide, removing the ice water bath after dropwise adding is finished, and continuously stirring and reacting for 2-5 h at room temperature to obtain a coral powder bromine end group treatment solution;
wherein the mass ratio of the 2-bromoisobutyryl bromide to the mixed liquid of triethylamine to the 4-dimethylaminopyridine to the coral powder amino treatment is 1: 0.8-0.12: 0.03-0.05: 10-15;
s3, adding the luteolin solution into the coral powder bromine end group treatment liquid, stirring uniformly, heating to 100-120 ℃ under the protection of inert gas, reacting for 3-6 h under the condition of condensation reflux, filtering and collecting a solid product after the reaction liquid is cooled to room temperature, washing the solid product with purified water until the washing liquid is neutral, then washing with absolute ethyl alcohol for 3-5 times, and then placing in a drying box for treatment to constant weight to obtain the surface functional coral powder;
wherein the mass ratio of the luteolin solution to the coral powder bromine end group treatment solution is 1: 2-4.
The production process of the non-woven fabric fiber material for medical and health protection comprises the following steps:
(1) weighing the polypropylene, adding the polypropylene into xylene, heating to 120-130 ℃, and continuously stirring until the polypropylene is completely dissolved to obtain a polypropylene solution;
(2) adding the surface functional coral powder into a polypropylene solution, dispersing until the surface functional coral powder is uniform, heating to 140-160 ℃, and continuously stirring for 0.5-2 hours to obtain a modified polypropylene mixed solution;
(3) distilling the modified polypropylene mixed solution under reduced pressure to remove the solvent, and then placing the modified polypropylene mixed solution in a drying oven with an air draft system for drying treatment to obtain a modified polypropylene composite material;
(4) heating the obtained modified polypropylene composite material to a molten state, and then extruding and granulating to obtain modified polypropylene master batches;
(5) carrying out melt spinning, winding and hot drawing on the obtained modified polypropylene master batch to obtain modified polypropylene fibers;
(6) and (3) sending the modified polypropylene fiber into an opener, and opening and carding to form a non-woven fabric fiber net to obtain the non-woven fabric fiber material for medical and health protection.
In the step (1), the mass ratio of the polypropylene to the xylene is 1: 12-20.
In the steps (1) and (2), the stirring speed is 500-1000 rpm.
In the step (3), the temperature of the oven is set to be 60-80 ℃, and the drying time is 12-24 hours.
In the step (4), the temperature is increased to a molten state and is 170-200 ℃.
In the step (5), the temperature of the melt spinning is 200-250 ℃.
The non-woven fabric fiber material for medical and health protection is applied to the manufacture of medical protective clothing, medical wound dressing and surgical articles.
Comparative example
A non-woven fabric fiber material for medical and health protection is disclosed, wherein the non-woven fabric fiber material is polypropylene fiber.
The diameter of the polypropylene fiber is 5-50 μm.
The production process of the non-woven fabric fiber material for medical and health protection comprises the following steps:
(1) heating the polypropylene composite material to a molten state, and then extruding and granulating to obtain polypropylene master batches;
(2) carrying out melt spinning, winding and hot drawing on the obtained polypropylene master batch to obtain polypropylene fiber;
(3) and (3) sending the polypropylene fibers into an opener, and opening and carding to form a non-woven fabric fiber net to obtain the non-woven fabric fiber material for medical and health protection.
In the step (1), the temperature is increased to a molten state and is 170-200 ℃.
In the step (2), the temperature of the melt spinning is 200-250 ℃.
In order to illustrate the present invention more clearly, the nonwoven fabric fiber materials prepared in examples 1 to 3 of the present invention and the comparative example were tested for their performance, specifically:
1. moisture absorption performance test: according to a related judgment method in GB/T21655.1-2008 'evaluation of moisture absorption quick drying of textiles', the wetting time, the water absorption rate and the liquid water transfer rate of a sample are respectively tested to represent the moisture absorption performance of the fabric. The soaking time is a time period when the upper surface and the lower surface of the non-woven fabric are just soaked; the water absorption rate reflects the transfer rate of the non-woven fabric to liquid water; the liquid water transfer rate reflects the ability of the nonwoven to move liquid water out of its plane, the higher the value, the stronger the fabric's ability to quickly absorb.
The results are shown in Table 1.
TABLE 1 moisture absorption Properties of different nonwoven fibrous materials
| Example 1 | Example 2 | Example 3 | Comparative example | |
| Soaking time/s | 14.3 | 15.6 | 14.2 | Hardly soaks in water |
| Water absorption Rate/(%. s)-1) | 33.5 | 28.4 | 33.8 | ＜1 |
| Liquid water transfer rate/(%. s)-1) | 12.6 | 12.1 | 12.7 | ＜0.1 |
2. And (3) testing antibacterial performance: staphylococcus aureus and Escherichia coli are selected as experimental strains, antibacterial performance of the tidy cloth sample is tested according to the international standard GB/T20944.1-2007 evaluation part 1 of antibacterial performance of textiles, namely agar plate diffusion method, the diameter of a bacteriostatic ring around the non-woven cloth sample is measured by a vernier caliper, and all test samples are prepared into a disc with the diameter of 8mm directly. And (3) evaluating the antibacterial effect according to the width of the antibacterial band and the bacterial reproduction condition under the sample, wherein the width of the antibacterial band is calculated according to the following formula:
D＝d1-d0/2；
wherein D represents the width of the antibacterial zone; d1And d0Respectively, the outer diameter of the zone and the diameter of the test specimen.
The results are shown in Table 2.
TABLE 2 antibacterial Properties of different nonwoven fiber materials
As can be seen from tables 1 and 2, the nonwoven fabric fiber materials prepared in embodiments 1 to 3 of the present invention have excellent moisture absorption and antibacterial properties, and can meet the use requirements of various products in the special industry of medical and health products.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A non-woven fabric fiber material for medical health protection is characterized in that the non-woven fabric fiber material is modified polypropylene fiber;
the modified polypropylene fiber is obtained by modifying polypropylene with surface functional coral powder, and the mass ratio of the surface functional coral powder to the polypropylene is 1: 15-35;
the preparation method of the surface functional coral powder comprises the following steps:
step 1, grinding coral sand into fine coral powder, and performing amination treatment on the fine coral powder to obtain coral powder amino-treated matter;
and 2, performing grafting reaction on the coral powder amino-treated substance and luteolin to obtain the surface functional coral powder.
2. The non-woven fabric fiber material for medical and health protection as claimed in claim 1, wherein the modified polypropylene fiber has a diameter of 5 to 50 μm.
3. The non-woven fabric fiber material for medical and health protection as claimed in claim 1, wherein in the step 1, the coral sand is ground into coarse coral powder of 1-100 μm and then ground into fine coral powder of 10-50 nm.
4. A non-woven fabric fiber material for medical and health protection as claimed in claim 1, wherein in step 1, spermidine trihydrochloride is used to aminate coral powder.
5. The non-woven fabric fiber material for medical and health protection as claimed in claim 1, wherein in step 2, the coral powder amino-treated substance is reacted with 2-bromoisobutyryl bromide first, and the obtained product is then subjected to a grafting reaction with luteolin.
6. The non-woven fabric fibrous material for medical hygiene protection according to claim 1, wherein the step 1 is specifically:
s1, coarse grinding coral sand to form coarse coral powder with the particle size of 1-100 microns, and then grinding the coarse coral powder by using a nano grinder to form fine coral powder with the particle size of 10-50 nm;
s2, putting the coral fine powder into distilled water, then dropwise adding gamma-aminopropyl triethoxysilane, and carrying out ultrasonic treatment for 0.5-2 h at room temperature to obtain a coral fine powder mixed solution; adding spermidine trihydrochloride into distilled water, and stirring until the spermidine trihydrochloride is completely dissolved to obtain a spermidine trihydrochloride solution;
wherein in the coral fine powder mixed solution, the mass ratio of the coral fine powder, the gamma-aminopropyltriethoxysilane and the distilled water is 1: 0.05-0.1: 12-15; in the spermidine trihydrochloride solution, the mass ratio of spermidine trihydrochloride to distilled water is 1: 6-10;
s3, heating the coral fine powder mixed solution to 50-70 ℃, stirring at a speed of 200-400 rpm, dropwise adding a spermidine trihydrochloride solution, continuously reacting for 2-5 hours after completely dropwise adding, filtering and collecting solids after the reaction solution is cooled to room temperature, washing the solids with purified water for 3-5 times, and then placing the solids in a drying box at 80-100 ℃ for treatment to constant weight to obtain a coral powder amino-treated substance;
wherein the mass ratio of the spermidine trihydrochloride solution to the coral fine powder mixed solution is 1: 2-4.
7. A non-woven fibrous material for medical hygiene protection according to claim 1, characterized in that the step 2 is in particular:
s1, adding the coral powder amino treatment substance into cyclohexanone, and dispersing uniformly in an ultrasonic mode to obtain a coral powder amino treatment mixed solution; adding luteolin into a sodium hydroxide solution with the mass fraction of 1-5%, and stirring until the luteolin is completely dissolved to obtain a luteolin solution;
wherein the mass ratio of the coral powder amino treatment product to cyclohexanone is 1: 5-12; the mass ratio of the luteolin to the sodium hydroxide solution is 1: 8-15;
s2, adding triethylamine and 4-dimethylaminopyridine into the coral powder amino treatment mixed solution, uniformly mixing, placing the mixture in an ice water bath, stirring for 0.5-1 h, then under the protection of inert gas, stirring at the speed of 100-200 rpm while dropwise adding 2-bromoisobutyryl bromide, removing the ice water bath after dropwise adding is finished, and continuously stirring and reacting for 2-5 h at room temperature to obtain a coral powder bromine end group treatment solution;
wherein the mass ratio of the 2-bromoisobutyryl bromide to the mixed liquid of triethylamine to the 4-dimethylaminopyridine to the coral powder amino treatment is 1: 0.8-0.12: 0.03-0.05: 10-15;
s3, adding the luteolin solution into the coral powder bromine end group treatment liquid, stirring uniformly, heating to 100-120 ℃ under the protection of inert gas, reacting for 3-6 h under the condition of condensation reflux, filtering and collecting a solid product after the reaction liquid is cooled to room temperature, washing the solid product with purified water until the washing liquid is neutral, then washing with absolute ethyl alcohol for 3-5 times, and then placing in a drying box for treatment to constant weight to obtain the surface functional coral powder;
wherein the mass ratio of the luteolin solution to the coral powder bromine end group treatment solution is 1: 2-4.
8. A production process of a non-woven fabric fiber material for medical and health protection, which is used for producing the non-woven fabric fiber material for medical and health protection of any one of claims 1 to 7, and comprises the following steps:
(1) weighing the polypropylene, adding the polypropylene into xylene, heating to 120-130 ℃, and continuously stirring until the polypropylene is completely dissolved to obtain a polypropylene solution;
(2) adding the surface functional coral powder into a polypropylene solution, dispersing until the surface functional coral powder is uniform, heating to 140-160 ℃, and continuously stirring for 0.5-2 hours to obtain a modified polypropylene mixed solution;
(3) distilling the modified polypropylene mixed solution under reduced pressure to remove the solvent, and then placing the modified polypropylene mixed solution in a drying oven with an air draft system for drying treatment to obtain a modified polypropylene composite material;
(4) heating the obtained modified polypropylene composite material to a molten state, and then extruding and granulating to obtain modified polypropylene master batches;
(5) carrying out melt spinning, winding and hot drawing on the obtained modified polypropylene master batch to obtain modified polypropylene fibers;
(6) and (3) sending the modified polypropylene fiber into an opener, and opening and carding to form a non-woven fabric fiber net to obtain the non-woven fabric fiber material for medical and health protection.
9. The production process of the non-woven fabric fiber material for medical hygiene protection as claimed in claim 8, wherein in the step (1), the mass ratio of polypropylene to xylene is 1: 12-20; in the steps (1) and (2), the stirring speed is 500-1000 rpm; in the step (3), the temperature of the oven is set to be 60-80 ℃, and the drying time is 12-24 hours; in the step (4), the temperature is increased to a molten state and is 170-200 ℃; in the step (5), the temperature of the melt spinning is 200-250 ℃.
10. The non-woven fabric fiber material for medical hygiene protection according to claim 1, wherein the non-woven fabric fiber material for medical hygiene protection is used for manufacturing medical protective clothing, medical wound dressing and surgical products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011606474.2A CN112853604B (en) | 2020-12-28 | 2020-12-28 | Non-woven fabric fiber material for medical and health protection and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011606474.2A CN112853604B (en) | 2020-12-28 | 2020-12-28 | Non-woven fabric fiber material for medical and health protection and production process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112853604A true CN112853604A (en) | 2021-05-28 |
| CN112853604B CN112853604B (en) | 2021-09-21 |
Family
ID=75998446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011606474.2A Active CN112853604B (en) | 2020-12-28 | 2020-12-28 | Non-woven fabric fiber material for medical and health protection and production process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112853604B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08127762A (en) * | 1994-10-28 | 1996-05-21 | Marine Bio Kk | Ultraviolet screening agent, and cosmetic, fiber, and film containing the same |
| CN104817956A (en) * | 2015-04-02 | 2015-08-05 | 昆山联合环保涂料有限公司 | Coral elastic coating and preparation method thereof |
| CN108864561A (en) * | 2017-05-08 | 2018-11-23 | 山东圣泉新材料股份有限公司 | A kind of modified master batch, modified fibre prepared therefrom, modification nonwoven cloth and its preparation method and application |
| CN111021048A (en) * | 2019-12-27 | 2020-04-17 | 宋晓明 | Preparation method of uvioresistant polypropylene non-woven fabric |
| CN111253675A (en) * | 2018-11-30 | 2020-06-09 | 中科纺织研究院（青岛）有限公司 | Plant source PP master batch and preparation method and application thereof |
-
2020
- 2020-12-28 CN CN202011606474.2A patent/CN112853604B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08127762A (en) * | 1994-10-28 | 1996-05-21 | Marine Bio Kk | Ultraviolet screening agent, and cosmetic, fiber, and film containing the same |
| CN104817956A (en) * | 2015-04-02 | 2015-08-05 | 昆山联合环保涂料有限公司 | Coral elastic coating and preparation method thereof |
| CN108864561A (en) * | 2017-05-08 | 2018-11-23 | 山东圣泉新材料股份有限公司 | A kind of modified master batch, modified fibre prepared therefrom, modification nonwoven cloth and its preparation method and application |
| CN111253675A (en) * | 2018-11-30 | 2020-06-09 | 中科纺织研究院（青岛）有限公司 | Plant source PP master batch and preparation method and application thereof |
| CN111021048A (en) * | 2019-12-27 | 2020-04-17 | 宋晓明 | Preparation method of uvioresistant polypropylene non-woven fabric |
Non-Patent Citations (1)
| Title |
|---|
| 李敬芬: "《黄酮类衍生物的合成和性质》", 30 April 2008, 哈尔滨地图出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112853604B (en) | 2021-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110894642B (en) | Chitin modified PP spunbonded non-woven fabric | |
| US11453960B2 (en) | Algae modified pp spunbond non-woven fabric | |
| CN111749017B (en) | High-strength antibacterial melt-blown air filtering material and preparation method thereof | |
| CN109267163A (en) | A kind of lavender cellulose fibre and preparation method thereof | |
| CN109468691A (en) | A kind of antibiotic polyester fiber and preparation method thereof | |
| CN108716115B (en) | Antibacterial fiber, preparation method and application thereof | |
| CN109662356B (en) | Natural corn cotton cup | |
| CN108938091A (en) | A kind of preparation method of polypropylene non-woven fabric surgical operation towel | |
| CN111254512A (en) | Antibacterial composite polyvinyl alcohol fiber and preparation method and application thereof | |
| CN112853604B (en) | Non-woven fabric fiber material for medical and health protection and production process thereof | |
| KR102158145B1 (en) | A method for preparing antibacterial fiber | |
| CN105624920A (en) | Highly-antibacterial novel slightly-soluble nonwoven cloth capable of adsorbing heavy metal particles | |
| CN115961467B (en) | Porous antibacterial polyester fiber and preparation method thereof | |
| CN112647154A (en) | Antibacterial polylactic acid melt-blown non-woven fabric | |
| CN111270422A (en) | White non-woven fabric prepared from copper-carbon master batch | |
| CN116463784A (en) | Light warm-keeping wadding | |
| CN113463270B (en) | Polypropylene melt-blown non-woven fabric based on composite antibacterial electret master batch and preparation method | |
| CN109527666B (en) | Natural corn cotton cup | |
| CN110396769B (en) | Fully-degradable nonwoven fabric material for medical and health use | |
| CN112195561B (en) | Degradable non-woven fabric and preparation method thereof | |
| CN114525686A (en) | Auxiliary agent for manufacturing water-repellent cotton fibers and preparation method and application thereof | |
| CN115486994B (en) | Multilayer protective paper diaper and method for preparing paper diaper | |
| CN115125647B (en) | Woven belt and preparation method thereof | |
| CN117626632A (en) | Self-cleaning textile fiber and preparation process thereof | |
| CN115613215B (en) | Non-woven fabric for mask and production process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 512200 No.3, Jinling 2nd Road, Lechang industrial transfer park, Lechang City, Shaoguan City, Guangdong Province Patentee after: Guangdong baochuang environmental protection new material products Co.,Ltd. Address before: 512200 No.3, Jinling 2nd Road, Lechang industrial transfer park, Lechang City, Shaoguan City, Guangdong Province Patentee before: LECHANG BAOCHUANG ENVIRONMENTAL PROTECTION NEW MATERIAL PRODUCTS Co.,Ltd. |