CN113789006A - Medical non-woven gauze and production process thereof - Google Patents
Medical non-woven gauze and production process thereof Download PDFInfo
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- CN113789006A CN113789006A CN202111013088.7A CN202111013088A CN113789006A CN 113789006 A CN113789006 A CN 113789006A CN 202111013088 A CN202111013088 A CN 202111013088A CN 113789006 A CN113789006 A CN 113789006A
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- 239000000835 fiber Substances 0.000 claims abstract description 53
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 45
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- -1 polypropylene Polymers 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 22
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003063 flame retardant Substances 0.000 claims abstract description 21
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- 238000003756 stirring Methods 0.000 claims abstract description 19
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- 238000000034 method Methods 0.000 claims description 11
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 10
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- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 5
- 235000003283 Pachira macrocarpa Nutrition 0.000 claims description 5
- 235000014364 Trapa natans Nutrition 0.000 claims description 5
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- 229910001431 copper ion Inorganic materials 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 5
- 239000012362 glacial acetic acid Substances 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 5
- 235000009165 saligot Nutrition 0.000 claims description 5
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
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- 240000007594 Oryza sativa Species 0.000 claims 3
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- 238000010438 heat treatment Methods 0.000 abstract description 5
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—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
- D04H1/425—Cellulose series
- D04H1/4258—Regenerated cellulose series
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—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
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/492—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K2003/0806—Silver
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to a medical non-woven gauze and a production process thereof, wherein the medical non-woven gauze is prepared by the following steps: s1, preparing raw materials; s2, mixing the raw materials; placing polypropylene, maleic anhydride grafted polypropylene and viscose in a stirrer, adding a reinforcing additive, a flame retardant and an antibacterial agent, stirring to obtain a mixed material, placing the mixed material in a melting and softening device, and heating to melt and soften the mixed material at a high temperature; s3, extruding the melted and softened mixture through screw rotating extrusion equipment, sending the mixture out of a spinning die head through cold air through screw rotation, uniformly spraying to obtain mixed fibers, and performing cross lapping on the mixed fibers obtained by carding and combing the mixed fibers to obtain a fiber web; s4, putting the mixed fiber net in a press-forming device for press-forming to obtain a non-woven fabric primary cloth; s5, carrying out spunlace and drying on the non-woven fabric primary cloth to obtain the medical non-woven gauze.
Description
Technical Field
The invention relates to the technical field of non-woven fabrics, in particular to medical non-woven gauze and a production process thereof.
Background
The non-woven gauze is also called non-woven fabric, needle-punched cotton, needle-punched non-woven fabric and the like, is produced by adopting polyester fiber and polyester fiber materials and is manufactured by a needle-punching process, and can be manufactured into different thicknesses, hand feeling, hardness and the like. The non-woven fabric has the characteristics of moisture resistance, air permeability, flexibility, light weight, flame retardance, no toxicity, no odor, low price, recycling and the like. The product can be used in different industries, such as sound insulation, heat insulation, electric heating sheet, mask, clothing, medical use, filling material, etc.
The traditional medical non-woven gauze has poor flame retardant effect and antibacterial effect, so that the potential safety hazard of the non-woven fabric is large when the non-woven fabric is used, and meanwhile, the tensile strength is low, so that the service life is short; in the process of producing medical non-woven gauze, a press-forming device is often used, the forming efficiency of the existing press-forming device is low, and meanwhile, the automation degree is low, so that a large amount of manpower and material resources are consumed.
In order to solve the above-mentioned drawbacks, a technical solution is now provided.
Disclosure of Invention
The invention aims to provide medical non-woven gauze and a production process thereof.
The technical problems to be solved by the invention are as follows:
the traditional medical non-woven gauze has poor flame retardant effect and antibacterial effect, so that the potential safety hazard of the non-woven fabric is large when the non-woven fabric is used, and meanwhile, the tensile strength is low, so that the service life is short; in the process of producing medical non-woven gauze, a press-forming device is often used, the forming efficiency of the existing press-forming device is low, and meanwhile, the automation degree is low, so that a large amount of manpower and material resources are consumed.
The purpose of the invention can be realized by the following technical scheme:
a medical non-woven gauze is prepared by the following steps:
s1, preparing raw materials including polypropylene, maleic anhydride grafted polypropylene, reinforcing filler, flame retardant, viscose fiber and antibacterial agent;
s2, mixing the raw materials; placing polypropylene, maleic anhydride grafted polypropylene and viscose in a stirrer, adding a reinforcing additive, a flame retardant and an antibacterial agent, stirring to obtain a mixed material, placing the mixed material in a melting and softening device, and heating to melt and soften the mixed material at a high temperature;
s3, extruding the melted and softened mixture through screw rotating extrusion equipment, sending the mixture out of a spinning die head through cold air through screw rotation, uniformly spraying to obtain mixed fibers, and performing cross lapping on the mixed fibers obtained by carding and combing the mixed fibers to obtain a fiber web;
s4, putting the mixed fiber net in a press-forming device for press-forming to obtain a non-woven fabric primary cloth;
s5, carrying out spunlace and drying on the non-woven fabric primary cloth to obtain the medical non-woven gauze.
Further, step S2 includes the following raw materials by weight: 60-80 parts of polypropylene, 10-15 parts of maleic anhydride grafted polypropylene, 5-10 parts of reinforcing filler, 1-2 parts of flame retardant, 30-40 parts of viscose and 2-3 parts of antibacterial agent.
Further, the stirring speed of the stirrer in the step S3 is 800-.
Further, the press-molding device in the step S3 has a temperature of 150 ℃ and 200 ℃ and a pressure of 0.8-1.5 MPa.
Furthermore, the antibacterial agent is prepared by mixing nano silver ions, nano copper ions, chitosan quaternary ammonium salt, water chestnut yellow powder, coptis powder and andrographis paniculata powder.
Further, the preparation method of the reinforcing filler comprises the following steps: taking a full-grain rice hull, grinding the rice hull with full grains through 300-mesh 400-mesh sieve, adding the rice hull into deionized water, performing ultrasonic dispersion for 20-30min, then adding glacial acetic acid to adjust the pH value to 5.5-6.5, then washing for 1-2 times, and then drying to obtain the reinforced filler.
Further, the press-fit forming device comprises the following working steps:
the method comprises the following steps that firstly, a mixed fiber net moves into a forming groove on a forming die along with a first conveying belt through a first conveying motor, a first sliding plate is driven to move to the upper side of the forming groove through a first moving cylinder, and a pressing plate is pushed to move downwards through a pressing cylinder to perform pressing operation on the mixed fiber net in the forming groove to obtain non-woven fabric primary cloth;
and the second step, the forming die on the rotating disc is driven to move to the lower part of the carrying mechanism through the transfer motor, the second sliding plate is driven to move to the upper part of the forming die through the second moving cylinder, the negative pressure sucker is driven to descend to suck the non-woven fabric, and the non-woven fabric is transferred to the second conveying belt to move to the next stage for subsequent treatment.
A production process of medical non-woven gauze comprises the following steps:
s1, preparing raw materials, and weighing the following raw materials in parts by weight; 60-80 parts of polypropylene, 10-15 parts of maleic anhydride grafted polypropylene, 5-10 parts of reinforcing filler, 1-2 parts of flame retardant, 30-40 parts of viscose and 2-3 parts of antibacterial agent;
s2, mixing the raw materials; placing polypropylene, maleic anhydride grafted polypropylene and viscose in a stirrer, stirring for 20-30min at the stirring speed of 800-;
s3, extruding the melted and softened mixture through screw rotating extrusion equipment, sending the mixture out of a spinning die head through cold air through screw rotation, uniformly spraying to obtain mixed fibers, and performing cross lapping on the mixed fibers obtained by carding and combing the mixed fibers to obtain a fiber web;
s4, placing the mixed fiber net in a press forming device, and press forming at the temperature of 150-;
s5, carrying out spunlace and drying on the non-woven fabric primary cloth to obtain the medical non-woven gauze.
The invention has the beneficial effects that:
according to the invention, the physical property and tensile property of the prepared non-woven fabric are improved by adding the reinforcing filler, the flame retardant is added, so that the prepared non-woven fabric has a good flame retardant effect, and the antibacterial property of the non-woven fabric is improved by adding the antibacterial agent.
The press-forming device has high overall matching degree and automation, greatly reduces manpower and material resources, saves production cost, has practicability and richness, and improves the production efficiency of the medical non-woven gauze; the method comprises the steps that a first conveying motor is started to drive a first driving column to drive a first conveying belt to move, a mixed fiber net moves into a forming groove on a forming die along with the first conveying belt, a first moving cylinder is started to drive a first sliding plate to move to the upper side of the forming groove, a pressing cylinder is started to push a pressing plate to move downwards to perform pressing operation on the mixed fiber net in the forming groove, and non-woven fabric primary cloth is obtained;
through starting the transfer motor, the forming die on the drive rotating disc moves, when the non-woven fabric after forming moves to the below of the carrying mechanism, the second moving cylinder is started, the second sliding plate is driven to move to the top of the forming die, the carrying cylinder is started, the negative pressure sucker is driven to descend to suck the non-woven fabric, the non-woven fabric is transferred to the second conveying belt, the second conveying motor is started, the second driving column is driven to drive the second conveying belt to move, and the non-woven fabric is moved to the next stage for subsequent processing.
Drawings
The invention is described in further detail below with reference to the figures and specific embodiments.
FIG. 1 is a flow chart of a production process of a medical non-woven gauze of the invention;
FIG. 2 is a schematic view of the overall structure of the press-molding apparatus of the present invention;
FIG. 3 is a side view of a transfer table of the present invention;
FIG. 4 is a schematic structural view of a pressing mechanism according to the present invention;
fig. 5 is a schematic structural view of the carrying mechanism of the present invention.
In the figure: 1. a first transport mechanism; 11. a first transport table; 12. a first transport motor; 13. a first conveyor belt; 2. a transfer mechanism; 21. a transfer table; 22. a transfer motor; 23. rotating the disc; 24. forming a mold; 25. forming a groove; 3. a pressing mechanism; 31. a first fixing plate; 32. a first slide bar; 33. a first slide rail; 34. a first sliding plate; 35. a first moving cylinder; 36. pressing a cylinder; 37. pressing the plywood; 4. a carrying mechanism; 41. a second fixing plate; 42. a second slide bar; 43. a second slide rail; 44. a second sliding plate; 45. a second moving cylinder; 46. a carrying cylinder; 47. a negative pressure sucker; 5. a second transport mechanism; 51. a second transport table; 52. a second transport motor; 53. a second conveyor belt.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A medical non-woven gauze is prepared by the following steps:
s1, preparing raw materials including polypropylene, maleic anhydride grafted polypropylene, reinforcing filler, flame retardant, viscose fiber and antibacterial agent;
s2, mixing the raw materials; placing polypropylene, maleic anhydride grafted polypropylene and viscose in a stirrer, adding a reinforcing additive, a flame retardant and an antibacterial agent, stirring to obtain a mixed material, placing the mixed material in a melting and softening device, and heating to melt and soften the mixed material at a high temperature;
s3, extruding the melted and softened mixture through screw rotating extrusion equipment, sending the mixture out of a spinning die head through cold air through screw rotation, uniformly spraying to obtain mixed fibers, and performing cross lapping on the mixed fibers obtained by carding and combing the mixed fibers to obtain a fiber web;
s4, putting the mixed fiber net in a press-forming device for press-forming to obtain a non-woven fabric primary cloth;
s5, carrying out spunlace and drying on the non-woven fabric primary cloth to obtain the medical non-woven gauze.
Step S2 includes the following raw materials by weight: 60 parts of polypropylene, 10 parts of maleic anhydride grafted polypropylene, 5 parts of reinforcing filler, 1 part of flame retardant, 30 parts of viscose and 2 parts of antibacterial agent.
In step S3, the stirring speed of the stirrer is 800r/min, the stirring temperature is 200 ℃, and the stirring time is 20 min.
The press-molding apparatus in step S3 had a temperature of 150 ℃ and a pressure of 0.8 MPa.
The antibacterial agent is prepared by mixing nano silver ions, nano copper ions, chitosan quaternary ammonium salt, water chestnut yellow powder, coptis powder and andrographis paniculata powder.
The preparation method of the reinforcing filler comprises the following steps: taking a full-grain rice hull, grinding the rice hull to 300 meshes, adding the rice hull into deionized water, performing ultrasonic dispersion for 20min, then adding glacial acetic acid to adjust the pH value to 5.5, then washing for 1 time, and performing drying treatment to obtain the reinforced filler.
Example 2
A medical non-woven gauze is prepared by the following steps:
s1, preparing raw materials including polypropylene, maleic anhydride grafted polypropylene, reinforcing filler, flame retardant, viscose fiber and antibacterial agent;
s2, mixing the raw materials; placing polypropylene, maleic anhydride grafted polypropylene and viscose in a stirrer, adding a reinforcing additive, a flame retardant and an antibacterial agent, stirring to obtain a mixed material, placing the mixed material in a melting and softening device, and heating to melt and soften the mixed material at a high temperature;
s3, extruding the melted and softened mixture through screw rotating extrusion equipment, sending the mixture out of a spinning die head through cold air through screw rotation, uniformly spraying to obtain mixed fibers, and performing cross lapping on the mixed fibers obtained by carding and combing the mixed fibers to obtain a fiber web;
s4, putting the mixed fiber net in a press-forming device for press-forming to obtain a non-woven fabric primary cloth;
s5, carrying out spunlace and drying on the non-woven fabric primary cloth to obtain the medical non-woven gauze.
Step S2 includes the following raw materials by weight: 70 parts of polypropylene, 12 parts of maleic anhydride grafted polypropylene, 8 parts of reinforcing filler, 1.5 parts of flame retardant, 35 parts of viscose fiber and 2.5 parts of antibacterial agent.
In step S3, the stirring speed of the stirrer is 900r/min, the stirring temperature is 225 ℃, and the stirring time is 25 min.
The press-molding apparatus in step S3 had a temperature of 175 ℃ and a pressure of 1.2 MPa.
The antibacterial agent is prepared by mixing nano silver ions, nano copper ions, chitosan quaternary ammonium salt, water chestnut yellow powder, coptis powder and andrographis paniculata powder.
The preparation method of the reinforcing filler comprises the following steps: taking a full-grain rice hull, grinding the rice hull to 350 meshes, adding the rice hull into deionized water, performing ultrasonic dispersion for 25min, then adding glacial acetic acid to adjust the pH value to 6, then washing for 1 time, and performing drying treatment to obtain the reinforced filler.
Example 3
A medical non-woven gauze is prepared by the following steps:
s1, preparing raw materials including polypropylene, maleic anhydride grafted polypropylene, reinforcing filler, flame retardant, viscose fiber and antibacterial agent;
s2, mixing the raw materials; placing polypropylene, maleic anhydride grafted polypropylene and viscose in a stirrer, adding a reinforcing additive, a flame retardant and an antibacterial agent, stirring to obtain a mixed material, placing the mixed material in a melting and softening device, and heating to melt and soften the mixed material at a high temperature;
s3, extruding the melted and softened mixture through screw rotating extrusion equipment, sending the mixture out of a spinning die head through cold air through screw rotation, uniformly spraying to obtain mixed fibers, and performing cross lapping on the mixed fibers obtained by carding and combing the mixed fibers to obtain a fiber web;
s4, putting the mixed fiber net in a press-forming device for press-forming to obtain a non-woven fabric primary cloth;
s5, carrying out spunlace and drying on the non-woven fabric primary cloth to obtain the medical non-woven gauze.
Step S2 includes the following raw materials by weight: 80 parts of polypropylene, 15 parts of maleic anhydride grafted polypropylene, 10 parts of reinforcing filler, 2 parts of flame retardant, 40 parts of viscose and 3 parts of antibacterial agent.
The stirring speed of the stirrer in the step S3 is 800-1000r/min, the stirring temperature is 250 ℃, and the stirring time is 30 min.
The press-molding apparatus in step S3 had a temperature of 200 ℃ and a pressure of 1.5 MPa.
The antibacterial agent is prepared by mixing nano silver ions, nano copper ions, chitosan quaternary ammonium salt, water chestnut yellow powder, coptis powder and andrographis paniculata powder.
The preparation method of the reinforcing filler comprises the following steps: taking a full-grain rice hull, grinding the rice hull to 400 meshes, adding the rice hull into deionized water, performing ultrasonic dispersion for 30min, then adding glacial acetic acid to adjust the pH value to 6.5, then washing for 2 times, and drying to obtain the reinforced filler.
Referring to fig. 1-5, the press-forming apparatus of the above embodiment includes a first transporting mechanism 1, a transferring mechanism 2, a pressing mechanism 3, a carrying mechanism 4, and a second transporting mechanism 5;
the first conveying mechanism 1 comprises a first conveying table 11, a first conveying motor 12 is fixed on one side of the first conveying table 11, a first conveying belt 13 is installed on the outer side of the first conveying table 11, a first driving column is fixed at the output end of the first conveying motor 12, and the first driving column is rotatably connected with the inner surface of the first conveying belt 13; the upper surface of the first conveyor belt 13 is used for transporting the mixed fiber web;
the transfer mechanism 2 comprises a transfer table 21, a transfer motor 22 is fixed at the center of the lower surface of the transfer table 21, the output end of the transfer motor 22 penetrates through the transfer table 21 and is fixed with a rotating disc 23, the upper surface of the rotating disc 23 is divided into a plurality of areas through a plurality of annular uniformly-distributed partition plates, a forming mold 24 is fixed in each area, and a forming groove 25 is formed in the upper surface of each forming mold 24; the transfer mechanism 2 is used for moving the mixed fiber web from the pressing mechanism 3 to the carrying mechanism 4, so that the purpose of transfer and transportation is achieved.
The pressing mechanism 3 comprises a first fixed plate 31, a first sliding rod 32 is fixed at the top of the first fixed plate 31, a first sliding rail 33 and a first sliding plate 34 are arranged on one side of the first sliding rod 32, the first sliding plate 34 is connected with the first sliding rail 33 in a sliding manner, a first moving cylinder 35 is fixed at one end of the first sliding rod 32, the output end of the first moving cylinder 35 is fixed with the rear end of the first sliding plate 34, a pressing cylinder 36 is fixed at one side of the first sliding plate 34 away from the first sliding rod 32, and a pressing plate 37 is fixed at the output end of the pressing cylinder 36; the pressing mechanism 3 is used for pressing the mixed fiber web in the forming groove 25.
The carrying mechanism 4 comprises a second fixed plate 41, a second sliding rod 42 is fixed at the top of the second fixed plate 41, a second sliding rail 43 and a second sliding plate 44 are arranged on one side of the second sliding rod 42, the second sliding plate 44 is connected with the second sliding rail 43 in a sliding manner, a second moving cylinder 45 is fixed at one end of the second sliding rod 42, the output end of the second moving cylinder 45 is fixed with the rear end of the second sliding plate 44, a carrying cylinder 46 is fixed at one side of the second sliding plate 44 away from the second sliding rod 42, and a negative pressure suction cup 47 is fixed at the output end of the carrying cylinder 46; the conveying mechanism 4 is used for conveying the formed non-woven fabric primary cloth to the second conveying mechanism 5.
The second transportation mechanism 5 comprises a second transportation table 51, a second transportation motor 52 is fixed on one side of the second transportation table 51, a second conveying belt 53 is installed on the outer side of the second transportation table 51, a second driving column is fixed at the output end of the second transportation motor 52, and the second driving column is rotatably connected with the inner surface of the second conveying belt 53; the second transportation mechanism 5 is used for transporting the formed non-woven fabric to the next stage.
The transfer mechanism 2 is positioned at one side of the first transport mechanism 1, one end of the first transport table 11 is positioned right above one of the forming molds 24, the bottom ends of the first fixing plate 31 and the second fixing plate 41 are fixed with the upper surface of the transfer table 21, and the pressing mechanism 3 and the carrying mechanism 4 are respectively positioned at two sides of the rotating disc 23;
the working principle is as follows:
when the non-woven fabric pre-cloth pressing device is used, the first conveying motor 12 is started, the first driving column is driven to drive the first conveying belt 13 to move, the mixed fiber net moves into the forming groove 25 on the forming die 24 along with the first conveying belt 13, the first moving cylinder 35 is started, the first sliding plate 34 is driven to move to the upper side of the forming groove 25, the pressing cylinder 36 is started, the pressing plate 37 is pushed to move downwards to press the mixed fiber net in the forming groove 25, and non-woven fabric pre-cloth is obtained;
the transfer motor 22 is started to drive the forming die 24 on the rotating disc 23 to move, when the formed non-woven fabric is moved to the lower part of the carrying mechanism 4, the second moving cylinder 45 is started to drive the second sliding plate 44 to move to the upper part of the forming die 24, the carrying cylinder 46 is started to drive the negative pressure sucker 47 to descend to suck up the non-woven fabric, and the non-woven fabric is transferred to the second conveying belt 53, the second conveying motor 52 is started to drive the second driving column to drive the second conveying belt 53 to move, and the non-woven fabric is moved to the next stage for subsequent processing.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation and a specific orientation configuration and operation, and thus, should not be construed as limiting the present invention. Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the 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 otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through two or more elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (8)
1. The production process of the medical non-woven gauze is characterized by comprising the following steps:
s1, preparing raw materials including polypropylene, maleic anhydride grafted polypropylene, reinforcing filler, flame retardant, viscose fiber and antibacterial agent;
s2, mixing the raw materials; placing polypropylene, maleic anhydride grafted polypropylene and viscose in a stirrer, adding a reinforcing additive, a flame retardant and an antibacterial agent, stirring to obtain a mixed material, and placing the mixed material in a melting and softening device to heat so that the mixed material is melted and softened;
s3, extruding the melted and softened mixture through screw rotating extrusion equipment, sending the mixture out of a spinning die head through cold air through screw rotation, uniformly spraying to obtain mixed fibers, and performing cross lapping on the mixed fibers obtained by carding and combing the mixed fibers to obtain a fiber web;
s4, putting the mixed fiber net in a press-forming device for press-forming to obtain a non-woven fabric primary cloth;
s5, carrying out spunlace and drying on the non-woven fabric primary cloth to obtain the medical non-woven gauze.
2. The process of claim 1, wherein step S2 comprises the following raw materials by weight: 60-80 parts of polypropylene, 10-15 parts of maleic anhydride grafted polypropylene, 5-10 parts of reinforcing filler, 1-2 parts of flame retardant, 30-40 parts of viscose and 2-3 parts of antibacterial agent.
3. The process of claim 1, wherein the stirring speed of the stirrer in step S3 is 800-.
4. The process of claim 1, wherein the pressing device in step S3 has a temperature of 150 ℃ and 200 ℃ and a pressure of 0.8-1.5 MPa.
5. The process for producing medical non-woven gauze according to claim 1, wherein the antibacterial agent is prepared by mixing nano silver ions, nano copper ions, chitosan quaternary ammonium salt, water chestnut yellow powder, coptis root powder and andrographis paniculata powder.
6. The process for producing a medical nonwoven gauze according to claim 1, wherein the reinforcing filler is prepared by the following steps: taking a full-grain rice hull, grinding the rice hull with full grains through 300-mesh 400-mesh sieve, adding the rice hull into deionized water, performing ultrasonic dispersion for 20-30min, then adding glacial acetic acid to adjust the pH value to 5.5-6.5, then washing for 1-2 times, and then drying to obtain the reinforced filler.
7. The process of claim 1, wherein the press-forming device is operated by the steps of:
firstly, moving a mixed fiber net into a forming groove (25) on a forming die (24) along with a first conveying belt (13) through a first conveying motor (12), driving a first sliding plate (34) to move to the upper side of the forming groove (25) through a first moving cylinder (35), and pushing a pressing plate (37) to move downwards through a pressing cylinder (36) to press the mixed fiber net in the forming groove (25) to obtain a non-woven fabric primary cloth;
and secondly, driving a forming die (24) on a rotating disc (23) to move to the lower part of the carrying mechanism (4) through a transfer motor (22), driving a second sliding plate (44) to move to the upper part of the forming die (24) through a second moving cylinder (45), driving a negative pressure sucker (47) to descend through a carrying cylinder (46) to suck the non-woven fabric, and transferring the non-woven fabric onto a second conveying belt (53) to move to the next stage for subsequent treatment.
8. A medical nonwoven scrim, wherein said breathable, compliant nonwoven fabric is made by the method of making a breathable, compliant nonwoven fabric of claim 1.
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| CN202111013088.7A CN113789006A (en) | 2021-08-31 | 2021-08-31 | Medical non-woven gauze and production process thereof |
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| CN202111013088.7A CN113789006A (en) | 2021-08-31 | 2021-08-31 | Medical non-woven gauze and production process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206854963U (en) * | 2017-04-14 | 2018-01-09 | 通达(厦门)科技有限公司 | A kind of auto-stitching machine |
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Application publication date: 20211214 |