CN111516305A - Multipurpose medical non-woven fabric - Google Patents
Multipurpose medical non-woven fabric Download PDFInfo
- Publication number
- CN111516305A CN111516305A CN202010378555.5A CN202010378555A CN111516305A CN 111516305 A CN111516305 A CN 111516305A CN 202010378555 A CN202010378555 A CN 202010378555A CN 111516305 A CN111516305 A CN 111516305A
- Authority
- CN
- China
- Prior art keywords
- layer
- woven fabric
- fiber
- base cloth
- conical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Images
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- D—TEXTILES; PAPER
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Abstract
The invention belongs to the technical field of non-woven fabrics, in particular to a multipurpose medical non-woven fabric; the base cloth layer is made of non-woven fabric; a blended layer is arranged between the upper base cloth layer and the lower base cloth layer; the upper layer and the lower layer of the blended layer are both fiber textile layers, and the fiber textile layers are formed by mutually weaving bamboo fibers and weft yarns as warp yarns and stop-blood fibers; the middle layer of the blended layer is a coagulated fat layer which is formed by solidifying pure polyurethane resin, and microcrystalline cellulose particles are mixed in the pure polyurethane resin; the inside of the fat coagulation layer is provided with a povidone iodine disinfectant; when the purified polyurethane resin is solidified, the physical and mechanical properties of a coacervate formed by the linear structure of the polyurethane resin are better, and the tearing strength and the tensile strength are high, so that the phenomenon of tensile tearing or fracture of the non-woven fabric is prevented when the non-woven fabric is used; so that the medical non-woven fabric has the functions of antibiosis, bacteriostasis, deodorization, ultraviolet resistance and the like; can play the hemostatic role to the wound, and then improve the application range of the medical non-woven fabric.
Description
Technical Field
The invention belongs to the technical field of non-woven fabrics, and particularly relates to a multipurpose medical non-woven fabric.
Background
The nonwoven fabric is made of chemical fibers, plant fibers and the like on a wet or dry paper machine under the condition of using water or air as a suspension medium, and is called as a nonwoven fabric although the nonwoven fabric is a cloth and is not woven. The non-woven fabric is a new-generation environment-friendly material, and has the advantages of good strength, air permeability, water resistance, environmental friendliness, flexibility, no toxicity, no odor, low price and the like.
The medical and sanitary non-woven fabrics include surgical gowns, protective clothing, disinfection wrapping cloth, masks, diapers, household rags, wiping cloth and wet tissues.
Chinese patent discloses a compound medical non-woven fabric, patent application number 2018111872295, including the inlayer to and the skin towards outside air, have intermediate level, time skin between inlayer and the skin in proper order, the inlayer is made by dacron and hydroxyethyl methacrylate, the intermediate level is made by polyolefin fiber, time skin is made by polyacrylonitrile, chitin, nanometer titanium dioxide, the skin is made for polypropylene fibre, has the coagulation layer between skin and the time skin.
The above-mentioned matters can play the roles of blood absorption, sterilization and coagulation; however, most of the conventional non-woven fabrics are made of oriented or random fibers, but the non-woven fabrics are torn or broken when used for a long time; meanwhile, the conventional medical non-woven fabric cannot be used in various occasions, so that the application range of the medical non-woven fabric is reduced.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a multipurpose medical non-woven fabric which is mainly used for solving the problems that most of the existing non-woven fabrics are composed of oriented or random fibers, but the non-woven fabric can be torn or broken when being used for a long time; meanwhile, the conventional medical non-woven fabric cannot be used in various occasions, so that the application range of the medical non-woven fabric is reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention discloses a multipurpose medical non-woven fabric, which comprises a base fabric layer; the base cloth layer is made of non-woven fabric, and is divided into an upper layer and a lower layer; a blended layer is arranged between the upper base cloth layer and the lower base cloth layer; the upper layer and the lower layer of the blended layer are both fiber textile layers, and the fiber textile layers are formed by mutually weaving bamboo fibers and weft yarns as warp yarns and stop-blood fibers; the middle layer of the blended layer is a coagulated fat layer, the coagulated fat layer is formed by solidifying pure polyurethane resin, and microcrystalline cellulose particles are mixed in the pure polyurethane resin; the inside of the fat condensation layer is provided with a povidone iodine disinfectant; the blending layer is arranged between the base cloth layers and consists of a coagulated grease layer and a fiber spinning layer, the coagulated grease layer is formed by adopting pure polyurethane resin after solidification, and when the purified polyurethane resin is solidified, the physical and mechanical properties of a coagulated layer formed by a linear structure of the purified polyurethane resin are better, so that the tearing strength and the tensile strength are higher, the phenomenon of tensile tearing or fracture of the non-woven fabric during use is further improved, and the service life and the use safety of the medical non-woven fabric are further influenced;
the microcrystalline cellulose micro-particles existing in the polyurethane solidification film-forming process can act as 'crystal nuclei' when polyurethane macromolecules are coagulated, so that the macromolecule coagulation process is accelerated, and a micro pore structure is generated, so the microcrystalline cellulose is also called as a pore-foaming agent of polyurethane. The microporous structures can greatly improve the air permeability and the water permeability of the grease layer, so that the medical non-woven fabric can be better attached to the medical non-woven fabric; the fiber textile layer attached to the base cloth layer is formed by weaving bamboo fibers and hemostatic fibers, so that the medical non-woven fabric has the effects of resisting and inhibiting bacteria, deodorizing, resisting ultraviolet rays and the like, and can play a role of stopping bleeding on a wound when the medical non-woven fabric is wrapped on the wound of a patient, and the application range of the medical non-woven fabric is further enlarged;
the povidone iodine disinfectant can disinfect and form a film on the medical non-woven fabric when meeting water, a complex is formed between the iodine and molecules of a non-ionic surfactant (polyvinylpyrrolidone), the iodine directly acts on cell walls through the affinity of the complex to cells, a thin water-soluble bactericidal film is formed at a pre-infection part, the iodine can be quickly and durably released, and the protein of the thallus is oxidized and inactivated.
Preferably, a plurality of tapered chutes are uniformly formed in the lower surface of the upper base cloth layer and the upper surface of the lower base cloth layer, and the tapered chutes are symmetrically arranged; the upper surface and the lower surface of the blending layer are uniformly provided with a plurality of conical oblique strips, and the conical oblique strips are adhered into the conical oblique grooves; through the cooperation of the tapered chutes arranged on the base cloth layer and the tapered oblique strips arranged on the blending layer, the stable bonding joint effect between the blending layer and the base cloth layer can be improved, and the phenomenon that the medical non-woven fabric is separated and deformed when used for a long time or washed by water is effectively prevented.
Preferably, the upper surface of the grease coagulation layer is provided with a plurality of conical grooves, and two side surfaces of the plurality of conical grooves are uniformly provided with a plurality of inserting holes; glue films are sealed in the plurality of inserting holes, and povidone iodine disinfector is filled in the glue films; a conical clamping strip is bonded in the conical groove, and the inclined planes at the two sides of the conical clamping strip are provided with spurs; when needs use medical non-woven fabrics to disinfect and disinfect, medical personnel can carry out the rolling extrusion with medical non-woven fabrics, make the sealed glued membrane that the thorn of toper card strip both sides can set up in the spliced hole extrude the breakage, and then make the povidone iodine disinfectant of sealed glued membrane intussuseption permeate into in the fibre weaving layer, because povidone iodine disinfectant has certain thick liquid, and then can form the disinfection membrane on medical non-woven fabrics, and then the cooperation of the disinfection membrane of fibre weaving intraformational hemostatic fiber and the formation of povidone iodine disinfectant, can further improve the disinfection and isolation effect of medical non-woven fabrics, can effectively prevent simultaneously because medical non-woven fabrics is under the state that the hydrosolvent was infiltrated, the phenomenon that the disinfection and isolation material was oozed in a large number in medical non-woven fabrics, and then the disinfection's of medical non-.
Preferably, the concentration of effective iodine in the povidone iodine disinfectant is 0.2-1.0%, and the effective iodine concentration is formed by diluting with deionized water; adopt deionized water to dilute effective iodine concentration, prevent that the concentration of iodine is too high in medical non-woven fabrics, and then lead to medical non-woven fabrics when contacting the patient, make the patient produce the reaction of hypersensitivity or irritability too high easily, and then influence the result of use of medical non-woven fabrics.
Preferably, the upper end surface of the conical clamping strip is a rough surface, and the conical clamping strip is formed by weaving hemostatic fibers; the hemostatic fiber is prepared by processing viscose; the conical clamping strips are arranged in a rough surface mode, so that the high-efficiency bonding effect between the grease coagulation layer and the fiber textile layer can be improved, and the phenomenon that the blended layer is separated or falls off is prevented; meanwhile, the hemostatic fiber is made of viscose fiber, the viscose fiber is processed by chemical materials containing natural cellulose, such as wood, cotton linter, reed and the like, is also commonly called artificial cotton, has the basic performance of the natural fiber, and has the advantages of good fastness, soft fabric, high specific gravity, good draping property, good moisture absorption property, difficult generation of static electricity, fluffing and pilling, and effective connection stability with the base cloth layer and the coagulated fat layer.
Preferably, the preparation method of the hemostatic fiber comprises the following steps:
s1: preparing viscose by adopting continuous dipping and squeezing, then forming a trickle of the prepared viscose through a spinneret orifice, feeding the trickle into an acid-containing coagulation bath, neutralizing alkali in the viscose, coagulating the trickle into a strand, and decomposing cellulose xanthate to regenerate hydrated fiber filaments;
s2: putting the hydrated cellosilk prepared in the step S1 into a water washing tank, and washing the hydrated cellosilk with water; after being washed, the mixture is led into a desulfurization tank, and the aqueous solution of sodium sulfide in the desulfurization tank can be used for desulfurizing the surface of the hydrated cellulose to form viscose fiber yarns;
s3: delivering the viscose rayon yarn desulfurized in the step S2 into a body fluid tank, wherein the ethanol solution in the body fluid tank can sterilize and disinfect the hydrated fiber; then extruding and washing the sterilized viscose fiber yarn for multiple times; then injecting the thrombin solution into the tissue of the viscose fiber silk by adopting a needle-punching injection mode, simultaneously observing the thrombin solution to form a water film on the surface of the viscose fiber silk, and stopping injection to prepare the hemostatic fiber silk; the thrombin solution is injected into the hydrated cellosilk in a needling injection mode, so that the thrombin solution can be stably and fully filled into the hydrated cellosilk, a water film is formed on the surface of the hydrated cellosilk by the thrombin solution, a hemostatic protective layer is formed on the surface of the hemostatic cellosilk after drying, oiling on the formed viscose cellosilk is not needed, and the phenomenon that the produced hemostatic fiber generates static electricity can be prevented;
s4: and (3) inputting the hemostatic fiber prepared in the step S3 into a low-temperature drying box, wherein the temperature of the drying box is 33-36 ℃, drying the hemostatic fiber, and then rolling and storing the rolled hemostatic fiber by adopting a sterile sealing film.
Preferably, the method for producing the multipurpose non-woven fabric comprises the following steps:
s1: preparing a base fabric layer: adding fibrous or powdery hot-melt bonding reinforcing materials into the fiber web, heating, melting, cooling and reinforcing the fiber web into a non-woven fabric layer, and carving the surface of the non-woven fabric layer by adopting a laser carving and cutting mode through a tapered chute;
s2: preparing a gel layer: adding a proper amount of microcrystalline cellulose particles into pure polyurethane resin, stirring to form sol, coating the sol on release paper serving as a carrier, and drying the sol on the release paper through an oven to form a gel coat;
s3: preparing a blending layer: then cutting the tapered slot and the plurality of inserting holes on the grease layer by adopting laser engraving; blowing a sealing adhesive film into the plug hole in a micro blow molding mode, and then injecting the povidone iodine disinfectant into the sealing adhesive film in a micro-tube injection mode; then bonding the fiber textile layer to the outer surface of the grease coagulation layer in a hot-pressing mode to form a blended layer; the adoption of a micro-injection mode can enable a sealing adhesive film to be quickly formed in the inserting hole, and meanwhile, the sealing adhesive film can protect the povidone-iodine disinfectant, so that the phenomenon that the iodine solution in the povidone-iodine disinfectant is evaporated due to the fact that the medical non-woven fabric is not used for a long time in a high-temperature environment is prevented, and the high-efficiency sterilization and disinfection effect of the medical non-woven fabric is further influenced;
s4: uniformly coating thermosensitive adhesive on one surface, provided with the tapered chute, of the base cloth layer prepared in the step S1, and thermally pressing the base cloth layer to the outer surface of the blended layer prepared in the step S3 by using a hot pressing roller, wherein micropores are formed in the surface of the hot pressing roller, and the diameter of each micropore is 3-5 microns; the hot-pressing roller blows high-pressure hot gas through the micro-pores, so that medical non-woven fabrics are prepared; the base cloth layer which is hot-pressed is blown at high pressure through the micro-pores, so that high-pressure gas can enter between the blending layer and the base cloth layer through the air pores of the base cloth layer, the thermosensitive adhesive coated on the base cloth layer forms pores under the blowing of the high-pressure gas, and certain air permeability and water permeability can be kept when the base cloth layer is bonded with the blending layer; can prevent that the heat-sensitive adhesive forms a sealing film between the base cloth layer and the blending layer because the base cloth layer and the blending layer are bonded by the heat-sensitive adhesive, thereby influencing the air permeability and the water permeability of the medical non-woven fabric.
The invention has the following beneficial effects:
1. according to the medical non-woven fabric, the blending layer is arranged between the base fabric layers and consists of the coagulated grease layer and the fiber spinning layer, the coagulated grease layer is formed by coagulating pure polyurethane resin, and when the pure polyurethane resin is coagulated, the physical and mechanical properties of the coagulated layer formed by the linear structure of the coagulated grease layer are better, so that the tearing strength and the tensile strength are higher, the phenomenon that the non-woven fabric is torn or broken in a stretching mode is prevented when the non-woven fabric is used, and the service life and the use safety of the medical non-woven fabric are further influenced.
2. When the medical non-woven fabric is wrapped on the wound of a patient, the medical non-woven fabric can play a role in stopping bleeding on the wound, so that the application range of the medical non-woven fabric is further enlarged; when needing to use medical non-woven fabrics to disinfect and disinfect, medical personnel can carry out the rolling extrusion with medical non-woven fabrics, and povidone iodine disinfectant has certain thick liquid, and then can form the disinfection membrane on medical non-woven fabrics, and then the cooperation of the disinfection membrane that fibre intraformational hemostasis fibre and povidone iodine disinfectant formed can further improve the disinfection effect of disinfecting of medical non-woven fabrics.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of a medical nonwoven fabric of the present invention;
FIG. 2 is a flow chart of a method of making a hemostatic fiber of the present invention;
FIG. 3 is a flow chart of a method for producing the medical nonwoven fabric of the present invention;
in the figure: the base cloth layer 1, the tapered chute 11, the blending layer 2, the fiber textile layer 3, the coagulated fat layer 4, the tapered groove 41, the inserting hole 42, the tapered oblique strip 5 and the tapered clamping strip 6.
Detailed Description
A multipurpose medical nonwoven fabric according to an embodiment of the present invention will be described below with reference to fig. 1 to 3.
As shown in fig. 1 to 3, the multipurpose medical non-woven fabric according to the present invention includes a base fabric layer 1; the base cloth layer 1 is made of non-woven fabric, and the base cloth layer 1 is divided into an upper layer and a lower layer; a blended layer 2 is arranged between the upper base cloth layer 1 and the lower base cloth layer 1; the upper layer and the lower layer of the blended layer 2 are both fiber textile layers 3, and the fiber textile layers 3 are formed by mutually weaving bamboo fibers and weft yarns as warp yarns and stop-blood fibers; the middle layer of the blended layer 2 is a coagulated fat layer 4, the coagulated fat layer 4 is formed by coagulating pure polyurethane resin, and microcrystalline cellulose particles are mixed in the pure polyurethane resin; the inside of the gel layer 4 is provided with a povidone iodine disinfectant; the blended layer 2 is arranged between the base cloth layers 1, the blended layer 2 is composed of a resin coagulating layer 4 and a fiber spinning layer 3, the resin coagulating layer 4 is formed after pure polyurethane resin is coagulated, and when the pure polyurethane resin is coagulated, because the physical and mechanical properties of a coacervate formed by a linear structure of the coacervate are better, the tear strength and the tensile strength are higher, the phenomenon that the non-woven fabric is stretched and torn or broken when in use is further improved, and the service life and the use safety of the medical non-woven fabric are further influenced;
the microcrystalline cellulose micro-particles existing in the polyurethane solidification film-forming process can act as 'crystal nuclei' when polyurethane macromolecules are coagulated, so that the macromolecule coagulation process is accelerated, and a micro pore structure is generated, so the microcrystalline cellulose is also called as a pore-foaming agent of polyurethane. The microporous structures can greatly improve the air permeability and the water permeability of the grease layer 4, so that the medical non-woven fabric can be better attached to the medical non-woven fabric; the fiber textile layer 3 attached to the base cloth layer 1 is formed by weaving bamboo fibers and hemostatic fibers, so that the medical non-woven fabric has the effects of resisting and inhibiting bacteria, deodorizing, preventing ultraviolet rays and the like, and can play a role of stopping bleeding on a wound when the medical non-woven fabric is wrapped on the wound of a patient, thereby improving the application range of the medical non-woven fabric;
the povidone iodine disinfectant can disinfect and form a film on the medical non-woven fabric when meeting water, a complex is formed between the iodine and molecules of a non-ionic surfactant (polyvinylpyrrolidone), the iodine directly acts on cell walls through the affinity of the complex to cells, a thin water-soluble bactericidal film is formed at a pre-infection part, the iodine can be quickly and durably released, and the protein of the thallus is oxidized and inactivated.
Preferably, a plurality of tapered chutes 11 are uniformly formed in the lower surface of the upper base cloth layer 1 and the upper surface of the lower base cloth layer 1, and the tapered chutes 11 are symmetrically arranged; a plurality of conical oblique strips 5 are uniformly arranged on the upper surface and the lower surface of the blending layer 2, and the conical oblique strips 5 are adhered into the conical oblique grooves 11; through the cooperation of the tapered chutes 11 arranged on the base cloth layer 1 and the tapered oblique strips 5 arranged on the blending layer 2, the stable bonding joint effect between the blending layer 2 and the base cloth layer 1 can be improved, and the phenomenon that the medical non-woven fabric is separated and deformed between the base cloth layer 1 and the blending layer 2 when the medical non-woven fabric is used for a long time or washed by water is effectively prevented.
Preferably, the upper surface of the grease condensation layer 4 is provided with a plurality of tapered grooves 41, and two side surfaces of the tapered grooves 41 are uniformly provided with a plurality of insertion holes 42; glue films are sealed in the plurality of plug holes 42, and povidone iodine disinfectant is filled in the glue films; a conical clamping strip 6 is bonded in the conical groove 41, and the inclined planes at the two sides of the conical clamping strip 6 are provided with spurs; when needs use medical non-woven fabrics to disinfect and disinfect, medical personnel can carry out the rolling extrusion with medical non-woven fabrics, make the spurt of 6 both sides of toper card strip extrude the sealed glued membrane that sets up in the plug-in hole 42 broken, and then make the povidone iodine disinfectant of sealed glued membrane intussuseption permeate into in the fibre weaving layer 3, because povidone iodine disinfectant has certain thick liquid, and then can form the disinfection membrane on medical non-woven fabrics, and then the cooperation of the disinfection membrane of hemostatic fiber and the formation of povidone iodine disinfectant in the fibre weaving layer 3, can further improve the disinfection and isolation effect of medical non-woven fabrics, simultaneously can effectively prevent because medical non-woven fabrics is under the state that the hydrosolvent was infiltrated, the phenomenon that the disinfection and isolation material oozed in a large number in medical non-woven fabrics, and then the disinfection's of medical non-woven.
Preferably, the concentration of effective iodine in the povidone iodine disinfectant is 0.2-1.0%, and the effective iodine concentration is formed by diluting with deionized water; adopt deionized water to dilute effective iodine concentration, prevent that the concentration of iodine is too high in medical non-woven fabrics, and then lead to medical non-woven fabrics when contacting the patient, make the patient produce the reaction of hypersensitivity or irritability too high easily, and then influence the result of use of medical non-woven fabrics.
Preferably, the upper end surface of the conical clamping strip 6 is a rough surface, and the conical clamping strip 6 is formed by weaving hemostatic fibers; the hemostatic fiber is prepared by processing viscose; the conical clamping strips are arranged in a rough surface mode, so that the high-efficiency bonding effect between the grease condensing layer 4 and the fiber textile layer 3 can be improved, and the phenomenon that the blended layer 2 is separated or falls off is prevented; meanwhile, the hemostatic fibers are made of viscose fibers, the viscose fibers are made of chemical materials containing natural cellulose, such as wood, cotton linters, reeds and the like, are also commonly called artificial cotton, have the basic performance of the natural fibers, are good in fastness, soft in fabric, large in specific gravity, good in draping property and good in moisture absorption property, are not easy to generate static electricity, fuzz and pilling, and can effectively achieve the connection stability with the base cloth layer 1 and the gel coat layer 4.
Preferably, the preparation method of the hemostatic fiber comprises the following steps:
s1: preparing viscose by adopting continuous dipping and squeezing, then forming a trickle of the prepared viscose through a spinneret orifice, feeding the trickle into an acid-containing coagulation bath, neutralizing alkali in the viscose, coagulating the trickle into a strand, and decomposing cellulose xanthate to regenerate hydrated fiber filaments;
s2: putting the hydrated cellosilk prepared in the step S1 into a water washing tank, and washing the hydrated cellosilk with water; after being washed, the mixture is led into a desulfurization tank, and the aqueous solution of sodium sulfide in the desulfurization tank can be used for desulfurizing the surface of the hydrated cellulose to form viscose fiber yarns;
s3: delivering the viscose rayon yarn desulfurized in the step S2 into a body fluid tank, wherein the ethanol solution in the body fluid tank can sterilize and disinfect the hydrated fiber; then extruding and washing the sterilized viscose fiber yarn for multiple times; then injecting the thrombin solution into the tissue of the viscose fiber silk by adopting a needle-punching injection mode, simultaneously observing the thrombin solution to form a water film on the surface of the viscose fiber silk, and stopping injection to prepare the hemostatic fiber silk; the thrombin solution is injected into the hydrated cellosilk in a needling injection mode, so that the thrombin solution can be stably and fully filled into the hydrated cellosilk, a water film is formed on the surface of the hydrated cellosilk by the thrombin solution, a hemostatic protective layer is formed on the surface of the hemostatic cellosilk after drying, oiling on the formed viscose cellosilk is not needed, and the phenomenon that the produced hemostatic fiber generates static electricity can be prevented;
s4: and (3) inputting the hemostatic fiber prepared in the step S3 into a low-temperature drying box, wherein the temperature of the drying box is 33-36 ℃, drying the hemostatic fiber, and then rolling and storing the rolled hemostatic fiber by adopting a sterile sealing film.
Preferably, the method for producing the multipurpose medical non-woven fabric comprises the following steps:
s1: preparing a base fabric layer 1: adding fibrous or powdery hot-melt bonding reinforcing materials into the fiber web, heating, melting, cooling and reinforcing the fiber web into a non-woven fabric layer, and engraving the surface of the non-woven fabric layer by using a laser engraving and cutting mode through a tapered chute 11;
s2: preparation of the gel layer 4: adding a proper amount of microcrystalline cellulose particles into pure polyurethane resin, stirring to form sol, coating the sol on release paper serving as a carrier, and drying the sol on the release paper through an oven to form a gel coat 4;
s3: preparation of the blended layer 2: then, cutting the tapered groove 41 and the plurality of inserting holes 42 on the grease layer 4 by adopting laser engraving; blowing a sealing adhesive film into the plug holes 42 in a micro blow molding mode, and then injecting the povidone-iodine disinfectant into the sealing adhesive film in a micro-tube injection mode; then the fiber textile layer 3 is bonded to the outer surface of the grease condensing layer 4 in a hot pressing mode, and then the blending layer 2 is formed; by adopting a micro injection mode, a sealing adhesive film can be quickly formed in the insertion hole 42, and meanwhile, the sealing adhesive film can protect the povidone-iodine disinfectant, so that the phenomenon that iodine solution in the povidone-iodine disinfectant is evaporated when the medical non-woven fabric is not used for a long time in a high-temperature environment is prevented, and the high-efficiency sterilization and disinfection effect of the medical non-woven fabric is further influenced;
s4: uniformly coating thermosensitive adhesive on one surface, provided with the tapered chute 11, of the base cloth layer 1 prepared in the step S1, and thermally pressing the base cloth layer 1 to the outer surface of the blending layer 2 prepared in the step S3 by using a hot pressing roller, wherein micropores are formed in the surface of the hot pressing roller, and the diameter of each micropore is 3-5 microns; the hot-pressing roller blows high-pressure hot gas through the micro-pores, so that medical non-woven fabrics are prepared; high-pressure air is blown to the base cloth layer 1 which is in hot pressing through the micro air holes, so that high-pressure air can enter between the blending layer 2 and the base cloth layer 1 through the air holes of the base cloth layer 1, the thermosensitive adhesive coated on the base cloth layer 1 forms air holes under the blowing of the high-pressure air, and certain air permeability and water permeability can be kept when the base cloth layer 1 is bonded with the blending layer 2; can prevent that the heat-sensitive adhesive forms a sealing film between the base cloth layer 1 and the blending layer 2 because the base cloth layer 1 and the blending layer 2 are bonded by the heat-sensitive adhesive, thereby influencing the air permeability and the water permeability of the medical non-woven fabric.
Non-woven tear strength test:
the medical non-woven fabric is prepared by the production method of the multipurpose medical non-woven fabric, and 3 pieces of medical non-woven fabric are prepared and named as invention 1, invention 2 and invention 3; and the size is 50mm in width multiplied by 200mm in length;
preparing the contrast composite medical non-woven fabric in the contrast file by the preparation method of the contrast file to prepare 3 pieces of PU synthetic leather, and naming the PU synthetic leather to be divided into contrast 1, contrast 3 and contrast 3; and the size is 50mm in width multiplied by 200mm in length;
an experimental instrument: constant velocity traction type (CRT) strength testing machine; a trapezoidal template; scissors;
the experimental steps are as follows:
1. marking out a trapezoidal bevel edge, namely a clamping line, on the experimental sample by using a trapezoidal template, and cutting a 10 mm-long notch vertical to the short edge at the center of the short edge of the trapezoid;
2. before testing, the distance between the upper clamp and the lower clamp is corrected to be 100 +/-1 mm; the traction speed of the lower clamp is adjusted to be 100 mm/min;
3. placing the sample in an upper clamp and a lower clamp, enabling a clamping line to be parallel to a jaw line of the clamps, screwing screws of the upper clamp and the lower clamp, paying attention to symmetrical positions of the sample in the middle of the upper clamp and the lower clamp so that short edges of the trapezoidal sample can be kept in a vertical state, finally starting a strength testing machine, and recording a maximum tearing strength value after the sample is completely torn;
experimental tables
With the above average values of experimental data: the maximum force of the invention is as follows: 24.3N; tear strength: 21.1N \ mm
Control maximum force: 17.5N; tear strength: 15.7N \ mm;
it can be known to have above-mentioned experimental data, the blending layer that sets up between the base cloth layer, the blending layer comprises congealing fat layer and fibre weaving layer, and congeals the fat layer and adopt pure polyurethane resin to solidify the back and form, when polyurethane resin after the purification solidifies, because tear strength and tensile strength are all higher better for the physical and mechanical properties of the coacervate that its linear structure formed, and then improved the non-woven fabrics and prevented to produce tensile tearing or cracked phenomenon when using, and then the security of the life and the use of influence medical non-woven fabrics.
In the description of the present invention, it is to be understood that the terms "center", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (7)
1. A multipurpose medical non-woven fabric comprises a base fabric layer (1); the method is characterized in that: the base cloth layer (1) is made of non-woven fabric, and the base cloth layer (1) is divided into an upper layer and a lower layer; a blended layer (2) is arranged between the upper and lower base cloth layers (1); the upper layer and the lower layer of the blended layer (2) are both fiber textile layers (3), and the fiber textile layers (3) are formed by mutually weaving bamboo fibers and weft yarns as warp yarns and stop-blood fibers; the middle layer of the blended layer (2) is a gel layer (4), the gel layer (4) is formed by solidifying pure polyurethane resin, and microcrystalline cellulose particles are mixed in the pure polyurethane resin; the inside of the gel fat layer (4) is provided with a povidone iodine disinfectant.
2. The multipurpose medical nonwoven fabric according to claim 1, wherein: a plurality of conical chutes (11) are uniformly formed in the lower surface of the upper base cloth layer (1) and the upper surface of the lower base cloth layer (1), and the conical chutes (11) are symmetrically arranged; the upper surface and the lower surface of the blending layer (2) are uniformly provided with a plurality of conical oblique strips (5), and the conical oblique strips (5) are adhered into the conical oblique grooves (11).
3. The multipurpose medical nonwoven fabric according to claim 2, wherein: the upper surface of the grease condensation layer (4) is provided with a plurality of conical grooves (41), and two side surfaces of the plurality of conical grooves (41) are uniformly provided with a plurality of plug-in holes (42); glue films are sealed in the plurality of inserting holes (42), and povidone iodine disinfectant is filled in the glue films; the conical groove (41) is internally bonded with a conical clamping strip (6), and the inclined planes at the two sides of the conical clamping strip (6) are provided with thorns.
4. The multipurpose medical nonwoven fabric according to claim 3, wherein: the concentration of effective iodine in the povidone iodine disinfectant is 0.2-1.0%, and the concentration of effective iodine is formed after being diluted by deionized water.
5. The multipurpose medical nonwoven fabric according to claim 4, wherein: the upper end surface of the conical clamping strip (6) is a rough surface, and the conical clamping strip (6) is formed by weaving hemostatic fibers; the hemostatic fiber is prepared by processing viscose fiber.
6. The multipurpose medical nonwoven fabric according to claim 5, wherein: the preparation method of the hemostatic fiber comprises the following steps:
s1: preparing viscose by adopting continuous dipping and squeezing, then forming a trickle of the prepared viscose through a spinneret orifice, feeding the trickle into an acid-containing coagulation bath, neutralizing alkali in the viscose, coagulating the trickle into a strand, and decomposing cellulose xanthate to regenerate hydrated fiber filaments;
s2: putting the hydrated cellosilk prepared in the step S1 into a water washing tank, and washing the hydrated cellosilk with water; after being washed, the mixture is led into a desulfurization tank, and the aqueous solution of sodium sulfide in the desulfurization tank can be used for desulfurizing the surface of the hydrated cellulose to form viscose fiber yarns;
s3: delivering the viscose rayon yarn desulfurized in the step S2 into a body fluid tank, wherein the ethanol solution in the body fluid tank can sterilize and disinfect the hydrated fiber; then extruding and washing the sterilized viscose fiber yarn for multiple times; then injecting the thrombin solution into the tissue of the viscose fiber silk by adopting a needle-punching injection mode, simultaneously observing the thrombin solution to form a water film on the surface of the viscose fiber silk, and stopping injection to prepare the hemostatic fiber silk;
s4: and (3) inputting the hemostatic fiber prepared in the step S3 into a low-temperature drying box, wherein the temperature of the drying box is 33-36 ℃, drying the hemostatic fiber, and then rolling and storing the rolled hemostatic fiber by adopting a sterile sealing film.
7. The multipurpose medical nonwoven fabric according to claim 6, wherein: the production method of the multipurpose medical non-woven fabric comprises the following steps:
s1: preparing a base fabric layer (1): fibrous or powdery hot-melt bonding reinforcing materials are added into the fiber web, the fiber web is heated, melted, cooled and reinforced into a non-woven fabric layer, and the surface of the non-woven fabric layer is carved by a tapered chute (11) in a laser carving and cutting mode;
s2: preparing a gel layer (4): adding a proper amount of microcrystalline cellulose particles into pure polyurethane resin, stirring to form sol, coating the sol on release paper serving as a carrier, and drying the sol on the release paper through an oven to form a gel coat (4);
s3: preparing a blending layer (2): then, cutting a tapered groove (41) and a plurality of plug holes (42) on the condensed grease layer (4) by adopting laser engraving; blowing a sealing adhesive film into the plug hole (42) in a micro blow molding mode, and then injecting the povidone iodine disinfectant into the sealing adhesive film in a micro-tube injection mode; then the fiber textile layer (3) is bonded to the outer surface of the grease condensing layer (4) in a hot-pressing mode, and a blended layer (2) is formed;
s4: uniformly coating thermosensitive adhesive on one surface, provided with the tapered chute (11), of the base fabric layer (1) prepared in the step S1, and thermally pressing the base fabric layer (1) to the outer surface of the blended layer (2) prepared in the step S3 by using a hot pressing roller, wherein micropores are formed in the surface of the hot pressing roller, and the diameter of each micropore is 3-5 microns; the hot-pressing roller blows out high-pressure hot gas through the micro-pores, and then the medical non-woven fabric is prepared.
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