CN113529434A - Stain-resistant medical coated non-woven fabric and preparation method thereof - Google Patents
Stain-resistant medical coated non-woven fabric and preparation method thereof Download PDFInfo
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- CN113529434A CN113529434A CN202110854817.5A CN202110854817A CN113529434A CN 113529434 A CN113529434 A CN 113529434A CN 202110854817 A CN202110854817 A CN 202110854817A CN 113529434 A CN113529434 A CN 113529434A
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- 238000002360 preparation method Methods 0.000 title claims description 24
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- QKNYBSVHEMOAJP-UHFFFAOYSA-N 2-amino-2-(hydroxymethyl)propane-1,3-diol;hydron;chloride Chemical compound Cl.OCC(N)(CO)CO QKNYBSVHEMOAJP-UHFFFAOYSA-N 0.000 description 1
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- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
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Images
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/18—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials
- D06N3/186—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials one of the layers is on one surface of the fibrous web and the other layer is on the other surface of the fibrous web
-
- 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
- D04H1/558—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 combination with mechanical or physical treatments other than embossing
-
- 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
- D04H1/559—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 the fibres being within layered webs
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
- D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
- D06H7/04—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials longitudinally
- D06H7/06—Removing selvedge edges
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/045—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with polyolefin or polystyrene (co-)polymers
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/14—Properties of the materials having chemical properties
- D06N2209/146—Soilproof, soil repellent
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/18—Medical, e.g. bandage, prostheses or catheter
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Paints Or Removers (AREA)
- Materials For Medical Uses (AREA)
Abstract
The invention discloses a stain-resistant medical coated non-woven fabric which comprises a non-woven fabric layer, wherein a stain-resistant coating is coated on the outer surface of the non-woven fabric layer, and a biological coating is coated on the inner surface of the non-woven fabric layer; the stain-resistant coating is formed by coating stain-resistant paint on the surface of a non-woven fabric layer, and the stain-resistant paint is prepared from the following raw materials in parts by weight: 40-50 parts of vinyl acetate-ethylene copolymer emulsion; 8-15 parts of cotton fibers; 3-7 parts of bis (2,4, 6-trichlorophenyl) oxalate; 15-23 parts of chitosan; 5-7 parts of bismuth nitrate; the biological coating is formed by coating biological paint on the surface of the non-woven fabric layer, and the biological paint is composed of the following raw materials in parts by weight: 30-40 parts of chitosan; 25-30 parts of gelatin; 25-30 parts of hyaluronic acid; 10-12 parts of cotton fibers; 3-5 parts of a coupling agent; the product made of the non-woven fabric prepared by the method has strong stain resistance, long cleaning period and is easy to clean.
Description
Technical Field
The invention relates to the technical field of non-woven fabrics, in particular to a stain-resistant medical coated non-woven fabric.
Background
The non-woven fabric is also called non-woven fabric, and is formed from oriented or random fibre, and is called fabric because of its appearance and some properties, and possesses the characteristics of moisture-proofing, permeability, flexibility, light weight, no combustion-supporting, easy decomposition, non-toxic, non-irritation, rich colour, low cost and can be cyclically reused, for example, it is made up by adopting polypropylene (pp material) granules as raw material through the processes of high-temp. melting, spinning, laying and hot-pressing and rolling-up, and adopting a continuous one-step process.
According to the preparation method of CN111395009A a stain-resistant medical coating non-woven fabric, it is described that in order to make up for the deficiency of the prior art, the method solves the problem that in the prior art, after the non-woven fabric is soaked in the acetone solution, a large amount of deionized water is needed for washing, a large amount of deionized water is used, a large amount of deionized water reserve is needed, but the deionized water is easy to breed bacteria after being stored for a long time in a large amount, further pollutes the washed non-woven fabrics, meanwhile, the deionized water has low preparation efficiency, and the washed deionized water needs to be collected and treated in order to be effectively utilized, and in the prior art, the washed deionized water cannot be quickly treated and recycled, the invention also provides a preparation method of the stain-resistant medical coating non-woven fabric. "the nonwoven fabric in the prior art only considers the problem of stain resistance, however, the medical nonwoven fabric products mainly comprise disposable masks, protective clothing, operating clothing, isolation clothing and experimental clothing. Due to the specificity of medical use, the medical non-woven fabric has higher requirements on the performances of non-woven fabric such as stain resistance, dust filtration, material compounding and the like.
Disclosure of Invention
The invention provides a stain-resistant medical coated non-woven fabric with a long cleaning period, which solves the technical problems in the related technology.
According to one aspect of the invention, a stain-resistant medical coated non-woven fabric is provided, which comprises a non-woven fabric layer, wherein the outer surface of the non-woven fabric layer is coated with a stain-resistant coating, and the inner surface of the non-woven fabric layer is coated with a biological coating;
the stain-resistant coating is formed by coating stain-resistant paint on the surface of a non-woven fabric layer, and the stain-resistant paint is prepared from the following raw materials in parts by weight: 40-50 parts of vinyl acetate-ethylene copolymer emulsion; 8-15 parts of cotton fibers; 3-7 parts of bis (2,4, 6-trichlorophenyl) oxalate; 15-23 parts of chitosan; 5-7 parts of bismuth nitrate;
the biological coating is formed by coating biological paint on the surface of the non-woven fabric layer, and the biological paint is composed of the following raw materials in parts by weight: 30-40 parts of chitosan; 25-30 parts of gelatin; 25-30 parts of hyaluronic acid; 10-12 parts of cotton fibers; 3-5 parts of a coupling agent.
Further, the preparation method of the stain-resistant coating comprises the following steps:
s11, preparing a methanol solution of bis (2,4, 6-trichlorophenyl) oxalate with the mass percent of 11%;
s12, crushing and grinding the cotton fibers and the bismuth nitrate to obtain a mixture A;
s13, crushing and grinding chitosan, sieving the chitosan by a 150-mesh sieve, and then mixing the chitosan with the mixture A to obtain a mixture B;
s14, placing the mixture B and 11% by mass of methanol solution of bis (2,4, 6-trichlorophenyl) oxalate into a polytetrafluoroethylene reaction kettle, and stirring for 33min in a sealed manner at the temperature of 121 ℃ to obtain an intermediate product A;
and S15, mixing the intermediate product A with vinyl acetate-ethylene copolymer emulsion to obtain the stain-resistant coating.
Further, in the step S5, the intermediate product a and the vinyl acetate-ethylene copolymer emulsion are mixed by performing ultrasonic treatment at 65 ℃ for 25min, wherein the ultrasonic power is 1000W, and then stirring uniformly at 65 ℃.
Further, the preparation method of the biological coating comprises the following steps:
s21, preparing 11% by mass of methanol suspension of gelatin, 11% by mass of methanol suspension of chitosan, 11% by mass of methanol solution of hyaluronic acid and 11% by mass of methanol suspension of coupling agent;
s22, blending the methanol suspension of the gelatin, the methanol suspension of the chitosan, the methanol solution of the hyaluronic acid and the methanol solution of the coupling agent in the step S21, putting the mixture into a polytetrafluoroethylene reaction kettle, heating to 80 ℃, stirring for reaction for 3 hours, performing suction filtration, repeatedly washing the mixture with anhydrous methanol until the unreacted coupling agent is washed out, and preparing an intermediate product A;
s23, crushing bamboo fibers, grinding, sieving with a 150-mesh sieve, adding into a formic acid system containing 4% hydrochloric acid, and hydrolyzing for 20min to obtain an intermediate product B;
s24, placing the intermediate product A and the intermediate product B into a polytetrafluoroethylene reaction kettle, and hermetically stirring for 33min at the temperature of 121 ℃ to prepare the biological coating.
According to one aspect of the invention, a method for preparing a stain-resistant medical coated non-woven fabric is provided, wherein a stain-resistant coating layer is coated on the outer surface of a non-woven fabric layer, a melt-blown fabric is compounded on the inner surface of the non-woven fabric layer, and a biological paint is coated on the inner surface of the melt-blown fabric.
Furthermore, the device for compounding the melt-blown fabric on the inner surface of the non-woven fabric comprises a rack, and an unwinding mechanism, a winding mechanism and a compounding mechanism which are arranged on the rack, wherein the unwinding mechanism comprises two supporting rollers and an unwinding roller;
the two supporting rollers and the unwinding roller are respectively arranged on the front side and the rear side of the composite mechanism, and a roller shaft of the unwinding roller is connected with the rack through a roller shaft seat; winding the melt-blown fabric on the unwinding roller;
the composite mechanism comprises two composite rollers and a flame heating unit, the composite rollers are arranged up and down symmetrically, the composite rollers are connected with the rack through roller shafts, and the non-woven fabric layer and the melt-blown fabric pass through the two composite rollers and are pressed by the composite rollers;
the flame heating unit is arranged at the rear sides of the two composite rollers and is used for ejecting flame to heat and compound the non-woven fabric layer and the melt-blown fabric passing between the composite rollers;
the winding mechanism comprises a winding roller, and a roller shaft of the winding roller is connected with the rack through a roller shaft seat.
Further, unwinding mechanism is still including locating the trimming mechanism between backing roll and the combined mechanism, trimming mechanism includes two trimming seats and locates the side cut unit on the trimming seat, and the side cut unit includes cutter and trimming roller, and the cutter is the disc shape, and the center is rotated with the trimming seat through the pivot and is connected, the outer disc of the edge contact trimming roller of cutter, and the trimming roller is connected the trimming seat through the pivot to first power supply is connected in the pivot of trimming roller.
Furthermore, the trimming seat is connected with the rack in a sliding manner, the trimming seat is connected with the linear driving mechanism, and the linear driving mechanism is used for driving the two trimming seats to be close to or far away from each other. Thereby adjusting the width of the trimming edge.
Furthermore, unwinding mechanism still includes scutching mechanism, and scutching mechanism includes the scutching roller that two longitudinal symmetries set up, and one of them scutching roller passes through the pivot and connects the frame, and another scutching roller connects the scutching roller frame, and the one end of scutching roller frame is connected the scutching roller through the pivot, and the other end is articulated with the frame.
The invention has the beneficial effects that:
the product made of the non-woven fabric prepared by the method has strong stain resistance, long cleaning period and easy cleaning;
moreover, the biological coating is coated in the non-woven fabric, so that the non-woven fabric is good in skin-friendly property and biocompatibility, more suitable for close-fitting medical products, and even an excellent material suitable for medical masks.
Drawings
FIG. 1 is a flow chart of a method of preparing a stain-resistant coating according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method of preparing a bio-paint according to an embodiment of the present invention;
FIG. 3 is a side view of an apparatus for compounding meltblown fabric on the inner surface of a nonwoven fabric according to an embodiment of the present invention;
FIG. 4 is a schematic view of the vertical structure of the apparatus for forming meltblown on the inner surface of a nonwoven fabric according to the embodiment of the present invention;
FIG. 5 is a schematic structural view of a trimming mechanism according to an embodiment of the present invention;
FIG. 6 is a schematic view of a compound mechanism of an embodiment of the present invention.
In the figure: the device comprises a frame 100, a supporting roller 201, an unwinding roller 202, a trimming seat 203, a cutter 204, a trimming roller 205, a linear driving mechanism 206, an open width roller 207, an open width roller frame 208, a composite roller 301, a flame heating unit 302 and a winding roller 401.
Detailed Description
The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thereby implement the subject matter described herein, and are not intended to limit the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as needed. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with respect to some examples may also be combined in other examples.
Example 1
In the embodiment, the stain-resistant medical coated non-woven fabric comprises a non-woven fabric layer, wherein the outer surface of the non-woven fabric layer is coated with a stain-resistant coating, and the inner surface of the non-woven fabric layer is coated with a biological coating;
the stain-resistant coating is formed by coating stain-resistant paint on the surface of a non-woven fabric layer, and the stain-resistant paint is prepared from the following raw materials in parts by weight: 40 parts of vinyl acetate-ethylene copolymer emulsion; 8 parts of cotton fibers; 3 parts of bis (2,4, 6-trichlorophenyl) oxalate; 15 parts of chitosan; 5 parts of bismuth nitrate;
the biological coating is formed by coating biological paint on the surface of the non-woven fabric layer, and the biological paint is composed of the following raw materials in parts by weight: 30 parts of chitosan; 25 parts of gelatin; 25 parts of hyaluronic acid; 10 parts of cotton fibers; 3 parts of a coupling agent;
as shown in fig. 1, the preparation method of the stain-resistant coating comprises the following steps:
s11, preparing a methanol solution of bis (2,4, 6-trichlorophenyl) oxalate with the mass percent of 11%;
s12, crushing and grinding the cotton fibers and the bismuth nitrate to obtain a mixture A;
s13, crushing and grinding chitosan, sieving the chitosan by a 150-mesh sieve, and then mixing the chitosan with the mixture A to obtain a mixture B;
s14, placing the mixture B and 11% by mass of methanol solution of bis (2,4, 6-trichlorophenyl) oxalate into a polytetrafluoroethylene reaction kettle, and stirring for 33min in a sealed manner at the temperature of 121 ℃ to obtain an intermediate product A;
s15, mixing the intermediate product A with vinyl acetate-ethylene copolymer emulsion to obtain the stain-resistant coating;
in this example, in step S5, the intermediate product a is mixed with the vinyl acetate-ethylene copolymer emulsion by ultrasonic treatment at 65 ℃ for 25min, with ultrasonic power of 1000W, and then stirred uniformly at 65 ℃;
as shown in fig. 2, the preparation method of the biological coating comprises the following steps:
s21, preparing 11% by mass of methanol suspension of gelatin, 11% by mass of methanol suspension of chitosan, 11% by mass of methanol solution of hyaluronic acid and 11% by mass of methanol suspension of coupling agent;
s22, blending the methanol suspension of the gelatin, the methanol suspension of the chitosan, the methanol solution of the hyaluronic acid and the methanol solution of the coupling agent in the step S21, putting the mixture into a polytetrafluoroethylene reaction kettle, heating to 80 ℃, stirring for reaction for 3 hours, performing suction filtration, repeatedly washing the mixture with anhydrous methanol until the unreacted coupling agent is washed out, and preparing an intermediate product A;
s23, crushing bamboo fibers, grinding, sieving with a 150-mesh sieve, adding into a formic acid system containing 4% hydrochloric acid, and hydrolyzing for 20min to obtain an intermediate product B;
s24, placing the intermediate product A and the intermediate product B into a polytetrafluoroethylene reaction kettle, and hermetically stirring for 33min at the temperature of 121 ℃ to prepare the biological coating.
Example 2
In the embodiment, the stain-resistant medical coated non-woven fabric comprises a non-woven fabric layer, wherein the outer surface of the non-woven fabric layer is coated with a stain-resistant coating, and the inner surface of the non-woven fabric layer is coated with a biological coating;
the stain-resistant coating is formed by coating stain-resistant paint on the surface of a non-woven fabric layer, and the stain-resistant paint is prepared from the following raw materials in parts by weight: 42 parts of vinyl acetate-ethylene copolymer emulsion; 9 parts of cotton fibers; 4 parts of bis (2,4, 6-trichlorophenyl) oxalate; 15 parts of chitosan; 5 parts of bismuth nitrate;
the biological coating is formed by coating biological paint on the surface of the non-woven fabric layer, and the biological paint is composed of the following raw materials in parts by weight: 32 parts of chitosan; 25 parts of gelatin; 25 parts of hyaluronic acid; 10 parts of cotton fibers; 4 parts of a coupling agent;
as shown in fig. 1, the preparation method of the stain-resistant coating comprises the following steps:
s11, preparing a methanol solution of bis (2,4, 6-trichlorophenyl) oxalate with the mass percent of 11%;
s12, crushing and grinding the cotton fibers and the bismuth nitrate to obtain a mixture A;
s13, crushing and grinding chitosan, sieving the chitosan by a 150-mesh sieve, and then mixing the chitosan with the mixture A to obtain a mixture B;
s14, placing the mixture B and 11% by mass of methanol solution of bis (2,4, 6-trichlorophenyl) oxalate into a polytetrafluoroethylene reaction kettle, and stirring for 33min in a sealed manner at the temperature of 121 ℃ to obtain an intermediate product A;
s15, mixing the intermediate product A with vinyl acetate-ethylene copolymer emulsion to obtain the stain-resistant coating;
in this example, in step S5, the intermediate product a is mixed with the vinyl acetate-ethylene copolymer emulsion by ultrasonic treatment at 65 ℃ for 25min, with ultrasonic power of 1000W, and then stirred uniformly at 65 ℃;
as shown in fig. 2, the preparation method of the biological coating comprises the following steps:
s21, preparing 11% by mass of methanol suspension of gelatin, 11% by mass of methanol suspension of chitosan, 11% by mass of methanol solution of hyaluronic acid and 11% by mass of methanol suspension of coupling agent;
s22, blending the methanol suspension of the gelatin, the methanol suspension of the chitosan, the methanol solution of the hyaluronic acid and the methanol solution of the coupling agent in the step S21, putting the mixture into a polytetrafluoroethylene reaction kettle, heating to 80 ℃, stirring for reaction for 3 hours, performing suction filtration, repeatedly washing the mixture with anhydrous methanol until the unreacted coupling agent is washed out, and preparing an intermediate product A;
s23, crushing bamboo fibers, grinding, sieving with a 150-mesh sieve, adding into a formic acid system containing 4% hydrochloric acid, and hydrolyzing for 20min to obtain an intermediate product B;
s24, placing the intermediate product A and the intermediate product B into a polytetrafluoroethylene reaction kettle, and hermetically stirring for 33min at the temperature of 121 ℃ to prepare the biological coating.
Example 3
In the embodiment, the stain-resistant medical coated non-woven fabric comprises a non-woven fabric layer, wherein the outer surface of the non-woven fabric layer is coated with a stain-resistant coating, and the inner surface of the non-woven fabric layer is coated with a biological coating;
the stain-resistant coating is formed by coating stain-resistant paint on the surface of a non-woven fabric layer, and the stain-resistant paint is prepared from the following raw materials in parts by weight: 44 parts of vinyl acetate-ethylene copolymer emulsion; 9 parts of cotton fibers; 5 parts of bis (2,4, 6-trichlorophenyl) oxalate; 18 parts of chitosan; 6 parts of bismuth nitrate;
the biological coating is formed by coating biological paint on the surface of the non-woven fabric layer, and the biological paint is composed of the following raw materials in parts by weight: 35 parts of chitosan; 28 parts of gelatin; 28 parts of hyaluronic acid; 11 parts of cotton fibers; 4 parts of a coupling agent;
as shown in fig. 1, the preparation method of the stain-resistant coating comprises the following steps:
s11, preparing a methanol solution of bis (2,4, 6-trichlorophenyl) oxalate with the mass percent of 11%;
s12, crushing and grinding the cotton fibers and the bismuth nitrate to obtain a mixture A;
s13, crushing and grinding chitosan, sieving the chitosan by a 150-mesh sieve, and then mixing the chitosan with the mixture A to obtain a mixture B;
s14, placing the mixture B and 11% by mass of methanol solution of bis (2,4, 6-trichlorophenyl) oxalate into a polytetrafluoroethylene reaction kettle, and stirring for 33min in a sealed manner at the temperature of 121 ℃ to obtain an intermediate product A;
s15, mixing the intermediate product A with vinyl acetate-ethylene copolymer emulsion to obtain the stain-resistant coating;
in this example, in step S5, the intermediate product a is mixed with the vinyl acetate-ethylene copolymer emulsion by ultrasonic treatment at 65 ℃ for 25min, with ultrasonic power of 1000W, and then stirred uniformly at 65 ℃;
as shown in fig. 2, the preparation method of the biological coating comprises the following steps:
s21, preparing 11% by mass of methanol suspension of gelatin, 11% by mass of methanol suspension of chitosan, 11% by mass of methanol solution of hyaluronic acid and 11% by mass of methanol suspension of coupling agent;
s22, blending the methanol suspension of the gelatin, the methanol suspension of the chitosan, the methanol solution of the hyaluronic acid and the methanol solution of the coupling agent in the step S21, putting the mixture into a polytetrafluoroethylene reaction kettle, heating to 80 ℃, stirring for reaction for 3 hours, performing suction filtration, repeatedly washing the mixture with anhydrous methanol until the unreacted coupling agent is washed out, and preparing an intermediate product A;
s23, crushing bamboo fibers, grinding, sieving with a 150-mesh sieve, adding into a formic acid system containing 4% hydrochloric acid, and hydrolyzing for 20min to obtain an intermediate product B;
s24, placing the intermediate product A and the intermediate product B into a polytetrafluoroethylene reaction kettle, and hermetically stirring for 33min at the temperature of 121 ℃ to prepare the biological coating.
Example 4
In the embodiment, the stain-resistant medical coated non-woven fabric comprises a non-woven fabric layer, wherein the outer surface of the non-woven fabric layer is coated with a stain-resistant coating, and the inner surface of the non-woven fabric layer is coated with a biological coating;
the stain-resistant coating is formed by coating stain-resistant paint on the surface of a non-woven fabric layer, and the stain-resistant paint is prepared from the following raw materials in parts by weight: 46 parts of vinyl acetate-ethylene copolymer emulsion; 10 parts of cotton fibers; 5 parts of bis (2,4, 6-trichlorophenyl) oxalate; 18 parts of chitosan; 6 parts of bismuth nitrate;
the biological coating is formed by coating biological paint on the surface of the non-woven fabric layer, and the biological paint is composed of the following raw materials in parts by weight: 36 parts of chitosan; 26 parts of gelatin; 27 parts of hyaluronic acid; 11 parts of cotton fibers; 4 parts of a coupling agent;
as shown in fig. 1, the preparation method of the stain-resistant coating comprises the following steps:
s11, preparing a methanol solution of bis (2,4, 6-trichlorophenyl) oxalate with the mass percent of 11%;
s12, crushing and grinding the cotton fibers and the bismuth nitrate to obtain a mixture A;
s13, crushing and grinding chitosan, sieving the chitosan by a 150-mesh sieve, and then mixing the chitosan with the mixture A to obtain a mixture B;
s14, placing the mixture B and 11% by mass of methanol solution of bis (2,4, 6-trichlorophenyl) oxalate into a polytetrafluoroethylene reaction kettle, and stirring for 33min in a sealed manner at the temperature of 121 ℃ to obtain an intermediate product A;
s15, mixing the intermediate product A with vinyl acetate-ethylene copolymer emulsion to obtain the stain-resistant coating;
in this example, in step S5, the intermediate product a is mixed with the vinyl acetate-ethylene copolymer emulsion by ultrasonic treatment at 65 ℃ for 25min, with ultrasonic power of 1000W, and then stirred uniformly at 65 ℃;
as shown in fig. 2, the preparation method of the biological coating comprises the following steps:
s21, preparing 11% by mass of methanol suspension of gelatin, 11% by mass of methanol suspension of chitosan, 11% by mass of methanol solution of hyaluronic acid and 11% by mass of methanol suspension of coupling agent;
s22, blending the methanol suspension of the gelatin, the methanol suspension of the chitosan, the methanol solution of the hyaluronic acid and the methanol solution of the coupling agent in the step S21, putting the mixture into a polytetrafluoroethylene reaction kettle, heating to 80 ℃, stirring for reaction for 3 hours, performing suction filtration, repeatedly washing the mixture with anhydrous methanol until the unreacted coupling agent is washed out, and preparing an intermediate product A;
s23, crushing bamboo fibers, grinding, sieving with a 150-mesh sieve, adding into a formic acid system containing 4% hydrochloric acid, and hydrolyzing for 20min to obtain an intermediate product B;
s24, placing the intermediate product A and the intermediate product B into a polytetrafluoroethylene reaction kettle, and hermetically stirring for 33min at the temperature of 121 ℃ to prepare the biological coating.
Example 5
In the embodiment, the stain-resistant medical coated non-woven fabric comprises a non-woven fabric layer, wherein the outer surface of the non-woven fabric layer is coated with a stain-resistant coating, and the inner surface of the non-woven fabric layer is coated with a biological coating;
the stain-resistant coating is formed by coating stain-resistant paint on the surface of a non-woven fabric layer, and the stain-resistant paint is prepared from the following raw materials in parts by weight: 47 parts of vinyl acetate-ethylene copolymer emulsion; 8 parts of cotton fibers; 3 parts of bis (2,4, 6-trichlorophenyl) oxalate; 19 parts of chitosan; 7 parts of bismuth nitrate;
the biological coating is formed by coating biological paint on the surface of the non-woven fabric layer, and the biological paint is composed of the following raw materials in parts by weight: 38 parts of chitosan; 26 parts of gelatin; 25 parts of hyaluronic acid; 10 parts of cotton fibers; 5 parts of a coupling agent;
as shown in fig. 1, the preparation method of the stain-resistant coating comprises the following steps:
s11, preparing a methanol solution of bis (2,4, 6-trichlorophenyl) oxalate with the mass percent of 11%;
s12, crushing and grinding the cotton fibers and the bismuth nitrate to obtain a mixture A;
s13, crushing and grinding chitosan, sieving the chitosan by a 150-mesh sieve, and then mixing the chitosan with the mixture A to obtain a mixture B;
s14, placing the mixture B and 11% by mass of methanol solution of bis (2,4, 6-trichlorophenyl) oxalate into a polytetrafluoroethylene reaction kettle, and stirring for 33min in a sealed manner at the temperature of 121 ℃ to obtain an intermediate product A;
s15, mixing the intermediate product A with vinyl acetate-ethylene copolymer emulsion to obtain the stain-resistant coating;
in this example, in step S5, the intermediate product a is mixed with the vinyl acetate-ethylene copolymer emulsion by ultrasonic treatment at 65 ℃ for 25min, with ultrasonic power of 1000W, and then stirred uniformly at 65 ℃;
as shown in fig. 2, the preparation method of the biological coating comprises the following steps:
s21, preparing 11% by mass of methanol suspension of gelatin, 11% by mass of methanol suspension of chitosan, 11% by mass of methanol solution of hyaluronic acid and 11% by mass of methanol suspension of coupling agent;
s22, blending the methanol suspension of the gelatin, the methanol suspension of the chitosan, the methanol solution of the hyaluronic acid and the methanol solution of the coupling agent in the step S21, putting the mixture into a polytetrafluoroethylene reaction kettle, heating to 80 ℃, stirring for reaction for 3 hours, performing suction filtration, repeatedly washing the mixture with anhydrous methanol until the unreacted coupling agent is washed out, and preparing an intermediate product A;
s23, crushing bamboo fibers, grinding, sieving with a 150-mesh sieve, adding into a formic acid system containing 4% hydrochloric acid, and hydrolyzing for 20min to obtain an intermediate product B;
s24, placing the intermediate product A and the intermediate product B into a polytetrafluoroethylene reaction kettle, and hermetically stirring for 33min at the temperature of 121 ℃ to prepare the biological coating.
Example 6
In the embodiment, the stain-resistant medical coated non-woven fabric comprises a non-woven fabric layer, wherein the outer surface of the non-woven fabric layer is coated with a stain-resistant coating, and the inner surface of the non-woven fabric layer is coated with a biological coating;
the stain-resistant coating is formed by coating stain-resistant paint on the surface of a non-woven fabric layer, and the stain-resistant paint is prepared from the following raw materials in parts by weight: 49 parts of vinyl acetate-ethylene copolymer emulsion; 14 parts of cotton fibers; 7 parts of bis (2,4, 6-trichlorophenyl) oxalate; 23 parts of chitosan; 7 parts of bismuth nitrate;
the biological coating is formed by coating biological paint on the surface of the non-woven fabric layer, and the biological paint is composed of the following raw materials in parts by weight: 39 parts of chitosan; 28 parts of gelatin; 25 parts of hyaluronic acid; 12 parts of cotton fibers; 5 parts of a coupling agent;
as shown in fig. 1, the preparation method of the stain-resistant coating comprises the following steps:
s11, preparing a methanol solution of bis (2,4, 6-trichlorophenyl) oxalate with the mass percent of 11%;
s12, crushing and grinding the cotton fibers and the bismuth nitrate to obtain a mixture A;
s13, crushing and grinding chitosan, sieving the chitosan by a 150-mesh sieve, and then mixing the chitosan with the mixture A to obtain a mixture B;
s14, placing the mixture B and 11% by mass of methanol solution of bis (2,4, 6-trichlorophenyl) oxalate into a polytetrafluoroethylene reaction kettle, and stirring for 33min in a sealed manner at the temperature of 121 ℃ to obtain an intermediate product A;
s15, mixing the intermediate product A with vinyl acetate-ethylene copolymer emulsion to obtain the stain-resistant coating;
in this example, in step S5, the intermediate product a is mixed with the vinyl acetate-ethylene copolymer emulsion by ultrasonic treatment at 65 ℃ for 25min, with ultrasonic power of 1000W, and then stirred uniformly at 65 ℃;
as shown in fig. 2, the preparation method of the biological coating comprises the following steps:
s21, preparing 11% by mass of methanol suspension of gelatin, 11% by mass of methanol suspension of chitosan, 11% by mass of methanol solution of hyaluronic acid and 11% by mass of methanol suspension of coupling agent;
s22, blending the methanol suspension of the gelatin, the methanol suspension of the chitosan, the methanol solution of the hyaluronic acid and the methanol solution of the coupling agent in the step S21, putting the mixture into a polytetrafluoroethylene reaction kettle, heating to 80 ℃, stirring for reaction for 3 hours, performing suction filtration, repeatedly washing the mixture with anhydrous methanol until the unreacted coupling agent is washed out, and preparing an intermediate product A;
s23, crushing bamboo fibers, grinding, sieving with a 150-mesh sieve, adding into a formic acid system containing 4% hydrochloric acid, and hydrolyzing for 20min to obtain an intermediate product B;
s24, placing the intermediate product A and the intermediate product B into a polytetrafluoroethylene reaction kettle, and hermetically stirring for 33min at the temperature of 121 ℃ to prepare the biological coating.
Example 7
In the embodiment, the stain-resistant medical coated non-woven fabric comprises a non-woven fabric layer, wherein the outer surface of the non-woven fabric layer is coated with a stain-resistant coating, and the inner surface of the non-woven fabric layer is coated with a biological coating;
the stain-resistant coating is formed by coating stain-resistant paint on the surface of a non-woven fabric layer, and the stain-resistant paint is prepared from the following raw materials in parts by weight: 50 parts of vinyl acetate-ethylene copolymer emulsion; 15 parts of cotton fibers; 7 parts of bis (2,4, 6-trichlorophenyl) oxalate; 22 parts of chitosan; 6 parts of bismuth nitrate;
the biological coating is formed by coating biological paint on the surface of the non-woven fabric layer, and the biological paint is composed of the following raw materials in parts by weight: 40 parts of chitosan; 30 parts of gelatin; 30 parts of hyaluronic acid; 10 parts of cotton fibers; 3 parts of a coupling agent;
as shown in fig. 1, the preparation method of the stain-resistant coating comprises the following steps:
s11, preparing a methanol solution of bis (2,4, 6-trichlorophenyl) oxalate with the mass percent of 11%;
s12, crushing and grinding the cotton fibers and the bismuth nitrate to obtain a mixture A;
s13, crushing and grinding chitosan, sieving the chitosan by a 150-mesh sieve, and then mixing the chitosan with the mixture A to obtain a mixture B;
s14, placing the mixture B and 11% by mass of methanol solution of bis (2,4, 6-trichlorophenyl) oxalate into a polytetrafluoroethylene reaction kettle, and stirring for 33min in a sealed manner at the temperature of 121 ℃ to obtain an intermediate product A;
s15, mixing the intermediate product A with vinyl acetate-ethylene copolymer emulsion to obtain the stain-resistant coating;
in this example, in step S5, the intermediate product a is mixed with the vinyl acetate-ethylene copolymer emulsion by ultrasonic treatment at 65 ℃ for 25min, with ultrasonic power of 1000W, and then stirred uniformly at 65 ℃;
as shown in fig. 2, the preparation method of the biological coating comprises the following steps:
s21, preparing 11% by mass of methanol suspension of gelatin, 11% by mass of methanol suspension of chitosan, 11% by mass of methanol solution of hyaluronic acid and 11% by mass of methanol suspension of coupling agent;
s22, blending the methanol suspension of the gelatin, the methanol suspension of the chitosan, the methanol solution of the hyaluronic acid and the methanol solution of the coupling agent in the step S21, putting the mixture into a polytetrafluoroethylene reaction kettle, heating to 80 ℃, stirring for reaction for 3 hours, performing suction filtration, repeatedly washing the mixture with anhydrous methanol until the unreacted coupling agent is washed out, and preparing an intermediate product A;
s23, crushing bamboo fibers, grinding, sieving with a 150-mesh sieve, adding into a formic acid system containing 4% hydrochloric acid, and hydrolyzing for 20min to obtain an intermediate product B;
s24, placing the intermediate product A and the intermediate product B into a polytetrafluoroethylene reaction kettle, and hermetically stirring for 33min at the temperature of 121 ℃ to prepare the biological coating.
Example 8
In the embodiment, the stain-resistant medical coated non-woven fabric comprises a non-woven fabric layer, wherein the outer surface of the non-woven fabric layer is coated with a stain-resistant coating, and the inner surface of the non-woven fabric layer is coated with a biological coating;
the stain-resistant coating is formed by coating stain-resistant paint on the surface of a non-woven fabric layer, and the stain-resistant paint is prepared from the following raw materials in parts by weight: 50 parts of vinyl acetate-ethylene copolymer emulsion; 15 parts of cotton fibers; 7 parts of bis (2,4, 6-trichlorophenyl) oxalate; 23 parts of chitosan; 7 parts of bismuth nitrate;
the biological coating is formed by coating biological paint on the surface of the non-woven fabric layer, and the biological paint is composed of the following raw materials in parts by weight: 40 parts of chitosan; 30 parts of gelatin; 30 parts of hyaluronic acid; 12 parts of cotton fibers; 5 parts of a coupling agent;
as shown in fig. 1, the preparation method of the stain-resistant coating comprises the following steps:
s11, preparing a methanol solution of bis (2,4, 6-trichlorophenyl) oxalate with the mass percent of 11%;
s12, crushing and grinding the cotton fibers and the bismuth nitrate to obtain a mixture A;
s13, crushing and grinding chitosan, sieving the chitosan by a 150-mesh sieve, and then mixing the chitosan with the mixture A to obtain a mixture B;
s14, placing the mixture B and 11% by mass of methanol solution of bis (2,4, 6-trichlorophenyl) oxalate into a polytetrafluoroethylene reaction kettle, and stirring for 33min in a sealed manner at the temperature of 121 ℃ to obtain an intermediate product A;
s15, mixing the intermediate product A with vinyl acetate-ethylene copolymer emulsion to obtain the stain-resistant coating;
in this example, in step S5, the intermediate product a is mixed with the vinyl acetate-ethylene copolymer emulsion by ultrasonic treatment at 65 ℃ for 25min, with ultrasonic power of 1000W, and then stirred uniformly at 65 ℃;
as shown in fig. 2, the preparation method of the biological coating comprises the following steps:
s21, preparing 11% by mass of methanol suspension of gelatin, 11% by mass of methanol suspension of chitosan, 11% by mass of methanol solution of hyaluronic acid and 11% by mass of methanol suspension of coupling agent;
s22, blending the methanol suspension of the gelatin, the methanol suspension of the chitosan, the methanol solution of the hyaluronic acid and the methanol solution of the coupling agent in the step S21, putting the mixture into a polytetrafluoroethylene reaction kettle, heating to 80 ℃, stirring for reaction for 3 hours, performing suction filtration, repeatedly washing the mixture with anhydrous methanol until the unreacted coupling agent is washed out, and preparing an intermediate product A;
s23, crushing bamboo fibers, grinding, sieving with a 150-mesh sieve, adding into a formic acid system containing 4% hydrochloric acid, and hydrolyzing for 20min to obtain an intermediate product B;
s24, placing the intermediate product A and the intermediate product B into a polytetrafluoroethylene reaction kettle, and hermetically stirring for 33min at the temperature of 121 ℃ to prepare the biological coating.
In the above embodiment, the stain-resistant coating formed by the latex mixed system is coated on the surface of the nonwoven fabric layer, and the stain-resistant coating is formed on the surface of the nonwoven fabric layer, so that the nonwoven fabric layer has good hydrophobicity and dust resistance, and can effectively prevent the generation of stains on the surface;
the inner surface of the non-woven fabric layer is coated with biological paint with good biocompatibility, which is prepared from materials such as gelatin and chitosan, and the biological paint is coated on the star biological coating on the inner surface of the non-woven fabric layer, has good skin-friendly property and biocompatibility, and is a good replacement material for gauze;
and (3) testing:
measuring the static contact angle, namely measuring the static water contact angle by using a JY-82 contact angle measuring instrument, representing the hydrophilicity of the surface, respectively measuring the static contact angles of five different positions of each sample, and taking the average value of the static contact angles;
static adsorption experiment of bovine serum albumin: taking a certain amount of bovine serum albumin solution into a Tris-HCl buffer solution (pH is 8) to prepare 1g/L bovine serum albumin solution, respectively immersing the unmodified non-woven fabric and the stain-resistant medical coated non-woven fabrics of examples 1-8 into the bovine serum albumin solution, mixing for 24 hours in a constant temperature oscillator at 30 ℃, performing a static adsorption experiment, respectively measuring the protein concentration in the bovine serum albumin solution before and after the static adsorption experiment by using an ultraviolet spectrophotometer at the wavelength of 280nm, and calculating the adsorption quantity of the bovine serum albumin so as to evaluate the protein stain resistance of the bovine serum albumin solution;
as can be seen from Table 1, the contact angle of the stain-resistant medical coated non-woven fabric modified by the method is obviously reduced, which shows that the modified stain-resistant medical coated non-woven fabric has obviously improved hydrophilic performance, and the modified stain-resistant medical coated non-woven fabric has reduced adsorption capacity to bovine serum albumin, which shows that the modified stain-resistant medical coated non-woven fabric can inhibit the adsorption of bovine serum albumin, and the stain-resistant performance is obviously improved.
Based on the non-woven fabric in the embodiment, when the non-woven fabric is applied to the field of masks, the blocking effect of viruses, bacteria and the like needs to be considered, the melt-blown fabric needs to be compounded, the melt-blown fabric is compounded on the inner surface of the non-woven fabric layer, and the biological paint is coated on the inner surface of the melt-blown fabric;
the non-woven fabric with the structure can be applied to the field of medical protective tools such as masks, and on one hand, the biological coating coated on the inner surface can have the functions of skin friendliness, water absorption and filtration.
As shown in fig. 3-6, the present invention provides an apparatus for combining meltblown fabrics on the inner surface of a nonwoven fabric, which comprises a frame 100, and an unwinding mechanism, a winding mechanism and a combining mechanism arranged on the frame 100, wherein the unwinding mechanism comprises two supporting rollers 201 and an unwinding roller 202, the two supporting rollers 201 are rotatably connected to the frame 100 through a rotating shaft, a nonwoven fabric roll is placed on the two supporting rollers 201, and a nonwoven fabric layer is wound on the nonwoven fabric roll;
two supporting rollers 201 and an unwinding roller 202 are respectively arranged at the front side and the rear side of the composite mechanism, and the roller shaft of the unwinding roller 202 is connected with the rack 100 through a roller shaft seat; the unwinding roller 202 is wound with meltblown fabric;
the composite mechanism comprises two composite rollers 301 which are symmetrically arranged up and down and a flame heating unit 302, the composite rollers 301 are connected with the rack 100 through roller shafts, and the non-woven fabric layer and the melt-blown fabric pass through between the two composite rollers 301 and are pressed by the composite rollers 301;
the flame heating unit 302 is arranged at the rear sides of the two composite rollers 301 and is used for ejecting flame to heat and compound the non-woven fabric layer and the melt-blown fabric passing between the composite rollers 301;
the winding mechanism comprises a winding roller 401, and a roller shaft of the winding roller 401 is connected with the rack 100 through a roller shaft seat.
The unwinding mechanism respectively unwinds the non-woven fabric layer and the melt-blown fabric, the compounding mechanism compounds two layers of materials, and then the product is wound through a winding roller 401 of the winding mechanism.
Unwinding mechanism is still including locating the trimming mechanism between backing roll 201 and the combined mechanism, trimming mechanism includes two trimming seats 203 and locates the side cut unit on the trimming seat 203, and the side cut unit includes cutter 204 and trimming roller 205, and cutter 204 is the disc shape, and the center is rotated through pivot and trimming seat 203 and is connected, and the edge contact of cutter 204 cuts the outer disc of trimming roller 205, and trimming roller 205 connects trimming seat 203 through the pivot to first power supply is connected in trimming roller 205's pivot.
As described above, the trimming seat 203 is slidably connected to the frame 100, the trimming seat 203 is connected to the linear driving mechanism 206, and the linear driving mechanism 206 is configured to drive the two trimming seats 203 to move closer to or away from each other. Thereby adjusting the width of the trimming edge.
The unreeling mechanism further comprises an expanding mechanism, the expanding mechanism comprises two expanding rollers 207 which are symmetrically arranged up and down, one expanding roller 207 is connected with the rack 100 through a rotating shaft, the other expanding roller 207 is connected with an expanding roller frame 208, one end of the expanding roller frame 208 is connected with the expanding roller 207 through a rotating shaft, and the other end of the expanding roller frame 208 is hinged with the rack 100. The scutching roller frame 208 hinged to the frame 100 enables the upper scutching roller 207 to swing by taking the scutching roller frame 208 as a swing arm, the upper scutching roller 207 is lifted during initial feeding to enable the material to pass through, and the material is applied with force by the gravity of the upper scutching roller 207 in the scutching process, so that the continuous scutching rollers 207 are matched to unfold the nonwoven fabric layer to eliminate wrinkles.
The flame heating unit 302 includes a fire grate and a gas supply mechanism connected to the fire grate, the gas supply mechanism is used for supplying gas to the fire grate, and an igniter for ignition is arranged on the fire grate.
To condition the flame, both ends of the fire grate are connected to the frame 100 through a rotating shaft, and the rotating shaft at one end of the fire grate is connected to a second power source.
The first power source and the second power source are both servo motors and are connected with the power source through the driver.
The equipment can be used for well compounding two layers of materials, the required compounding pressure is low, and the structural damage to the two layers of materials is small;
in order to solve the problem that the ventilation of the composite structure after composite is reduced due to the flame conforming method, gasified particles are mixed in the stain-resistant coating, and the gasified particles are gasified after being heated by the flame, so that micropores are formed on the stain-resistant coating.
The gasified particles are preferably sodium bicarbonate, decompose to produce gas, and the product contains water, which evaporates endothermically to protect the fouling resistant coating in direct contact with the flame.
In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
The embodiments of the present invention have been described with reference to the drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention and the protection scope of the claims.
Claims (9)
1. The stain-resistant medical coated non-woven fabric is characterized by comprising a non-woven fabric layer, wherein a stain-resistant coating is coated on the outer surface of the non-woven fabric layer, and a biological coating is coated on the inner surface of the non-woven fabric layer;
the stain-resistant coating is formed by coating stain-resistant paint on the surface of a non-woven fabric layer, and the stain-resistant paint is prepared from the following raw materials in parts by weight: 40-50 parts of vinyl acetate-ethylene copolymer emulsion; 8-15 parts of cotton fibers; 3-7 parts of bis (2,4, 6-trichlorophenyl) oxalate; 15-23 parts of chitosan; 5-7 parts of bismuth nitrate;
the biological coating is formed by coating biological paint on the surface of the non-woven fabric layer, and the biological paint is composed of the following raw materials in parts by weight: 30-40 parts of chitosan; 25-30 parts of gelatin; 25-30 parts of hyaluronic acid; 10-12 parts of cotton fibers; 3-5 parts of a coupling agent.
2. The stain-resistant medical coated nonwoven fabric according to claim 1, wherein the stain-resistant coating is prepared by the following steps:
s11, preparing a methanol solution of bis (2,4, 6-trichlorophenyl) oxalate with the mass percent of 11%;
s12, crushing and grinding the cotton fibers and the bismuth nitrate to obtain a mixture A;
s13, crushing and grinding chitosan, sieving the chitosan by a 150-mesh sieve, and then mixing the chitosan with the mixture A to obtain a mixture B;
s14, placing the mixture B and 11% by mass of methanol solution of bis (2,4, 6-trichlorophenyl) oxalate into a polytetrafluoroethylene reaction kettle, and stirring for 33min in a sealed manner at the temperature of 121 ℃ to obtain an intermediate product A;
and S15, mixing the intermediate product A with vinyl acetate-ethylene copolymer emulsion to obtain the stain-resistant coating.
3. The stain-resistant coated nonwoven fabric for medical use according to claim 2, wherein in the step S5, the intermediate product a is mixed with the vinyl acetate-ethylene copolymer emulsion by ultrasonic treatment at 65 ℃ for 25min with ultrasonic power of 1000W, and then stirred uniformly at 65 ℃.
4. The stain-resistant medical coated nonwoven fabric according to claim 1, wherein the preparation method of the biological coating material comprises the following steps:
s21, preparing 11% by mass of methanol suspension of gelatin, 11% by mass of methanol suspension of chitosan, 11% by mass of methanol solution of hyaluronic acid and 11% by mass of methanol suspension of coupling agent;
s22, blending the methanol suspension of the gelatin, the methanol suspension of the chitosan, the methanol solution of the hyaluronic acid and the methanol solution of the coupling agent in the step S21, putting the mixture into a polytetrafluoroethylene reaction kettle, heating to 80 ℃, stirring for reaction for 3 hours, performing suction filtration, repeatedly washing the mixture with anhydrous methanol until the unreacted coupling agent is washed out, and preparing an intermediate product A;
s23, crushing bamboo fibers, grinding, sieving with a 150-mesh sieve, adding into a formic acid system containing 4% hydrochloric acid, and hydrolyzing for 20min to obtain an intermediate product B;
s24, placing the intermediate product A and the intermediate product B into a polytetrafluoroethylene reaction kettle, and hermetically stirring for 33min at the temperature of 121 ℃ to prepare the biological coating.
5. The method as claimed in claim 1, wherein the contamination-resistant coated nonwoven fabric is prepared by coating the contamination-resistant coating layer on the outer surface of the nonwoven fabric layer, laminating the meltblown fabric on the inner surface of the nonwoven fabric layer, and coating the bio-paint on the inner surface of the meltblown fabric.
6. The method for preparing the stain-resistant medical coated non-woven fabric according to claim 5, wherein the device for compounding the melt-blown fabric on the inner surface of the non-woven fabric comprises a frame, and an unwinding mechanism, a winding mechanism and a compounding mechanism which are arranged on the frame, wherein the unwinding mechanism comprises two supporting rolls and an unwinding roll, the two supporting rolls are rotatably connected with the frame through rotating shafts, non-woven fabric rolls are placed on the two supporting rolls, and the non-woven fabric layer is wound on the non-woven fabric rolls;
the two supporting rollers and the unwinding roller are respectively arranged on the front side and the rear side of the composite mechanism, and a roller shaft of the unwinding roller is connected with the rack through a roller shaft seat; winding the melt-blown fabric on the unwinding roller;
the composite mechanism comprises two composite rollers and a flame heating unit, the composite rollers are arranged up and down symmetrically, the composite rollers are connected with the rack through roller shafts, and the non-woven fabric layer and the melt-blown fabric pass through the two composite rollers and are pressed by the composite rollers;
the flame heating unit is arranged at the rear sides of the two composite rollers and is used for ejecting flame to heat and compound the non-woven fabric layer and the melt-blown fabric passing between the composite rollers;
the winding mechanism comprises a winding roller, and a roller shaft of the winding roller is connected with the rack through a roller shaft seat.
7. The method according to claim 6, wherein the unwinding mechanism further comprises a trimming mechanism disposed between the support roll and the composite mechanism, the trimming mechanism comprises two trimming seats and a trimming unit disposed on the trimming seats, the trimming unit comprises a cutter and a trimming roller, the cutter is in a shape of a circular disc, the center of the cutter is rotatably connected with the trimming seats through a rotating shaft, the edge of the cutter contacts the outer circular surface of the trimming roller, the trimming roller is connected with the trimming seats through a rotating shaft, and the rotating shaft of the trimming roller is connected with the first power source.
8. The method for preparing a contamination-resistant coated non-woven fabric for medical use according to claim 7, wherein the edge cutting base is slidably connected to the frame, and the edge cutting base is connected to a linear driving mechanism for driving the two edge cutting bases to move closer or farther.
9. The method according to claim 6, wherein the unwinding mechanism further comprises a scutching mechanism, the scutching mechanism comprises two scutching rollers which are symmetrically arranged up and down, one of the scutching rollers is connected with the frame through a rotating shaft, the other scutching roller is connected with the scutching roller frame, one end of the scutching roller frame is connected with the scutching roller through a rotating shaft, and the other end of the scutching roller frame is hinged with the frame.
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| CN202110854817.5A CN113529434A (en) | 2021-07-28 | 2021-07-28 | Stain-resistant medical coated non-woven fabric and preparation method thereof |
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| CN202110854817.5A CN113529434A (en) | 2021-07-28 | 2021-07-28 | Stain-resistant medical coated non-woven fabric and preparation method thereof |
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| CN213128230U (en) * | 2020-08-25 | 2021-05-07 | 珠海汇圣技术有限公司 | Composite powder scattering equipment for mask machine |
| CN113026374A (en) * | 2021-03-04 | 2021-06-25 | 杭州新福华无纺布有限公司 | Dirt-resistant non-woven fabric and preparation method thereof |
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| CN101704459A (en) * | 2009-12-01 | 2010-05-12 | 江苏闳业机械有限公司 | Tension-adjustable two-roller active scutching device |
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