CN112760809A - Antibacterial medical non-woven fabric and preparation process thereof - Google Patents
Antibacterial medical non-woven fabric and preparation process thereof Download PDFInfo
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- CN112760809A CN112760809A CN202011582919.8A CN202011582919A CN112760809A CN 112760809 A CN112760809 A CN 112760809A CN 202011582919 A CN202011582919 A CN 202011582919A CN 112760809 A CN112760809 A CN 112760809A
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- woven fabric
- pipe
- antibacterial
- spunlace
- water outlet
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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
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
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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
- D04H18/00—Needling machines
- D04H18/04—Needling machines with water jets
Abstract
The invention discloses an antibacterial medical non-woven fabric and a preparation process thereof, and relates to the technical field of non-woven fabrics, step S1 is that a preparation system is adopted to prepare the non-woven fabric, and composite raw material fibers are subjected to opening, carding, lapping and spunlace in sequence to obtain the non-woven fabric; step S2, drying the non-woven fabric obtained in the step S1, controlling the drying temperature to be 95-120 ℃, and after drying, controlling the water content to be 20-30%; step S3, washing the non-woven fabric obtained in the step S2 with water for three times, and neutralizing with 3% acetic acid solution to ensure that the pH value of the non-woven fabric is 5.0-8.0; step S4, drying the non-woven fabric obtained in the step S3, wherein the drying temperature is controlled to be 95-120 ℃, and the water content is controlled to be 8-10%; in step S5, the nonwoven fabric obtained in step S4 is cooled and rolled. The invention adopts special antibacterial process and fiber materials, so that the non-woven fabric has a certain antibacterial effect and is more suitable for the medical field.
Description
Technical Field
The invention relates to the technical field of non-woven fabrics, in particular to an antibacterial medical non-woven fabric and a preparation process thereof.
Background
The non-woven fabric is called as a cloth because of the appearance and certain properties of the cloth, and is a non-woven fabric which is formed by directly utilizing high polymer slices, short fibers or filaments to form a net through air flow or machinery, then carrying out spunlacing, needling or hot rolling reinforcement, and finally carrying out after-treatment.
For example, the polypropylene (pp material) granules are mostly adopted as raw materials and are produced by a continuous one-step method of high-temperature melting, spinning, laying a line and hot-pressing coiling. The non-woven fabric has the characteristics of moisture resistance, air permeability, flexibility, light weight, no combustion supporting, easy decomposition, no toxicity or irritation, rich colors, low price, recycling and the like, is one of reinforcing materials, has the feeling of cotton, and compared with cotton fabrics, the non-woven fabric bag is easy to form and has low manufacturing cost.
Non-woven fabrics also uses in medical field, and its traditional processing raw materials are mostly simple chemical fibre composition, wrap skin direct contact class product being applied to the wound, and the effect is traditional relatively in the middle of the medical field, can only play isolated environment and wrap the effect. In order to improve the effect of the non-woven fabric in the medical direction, the patent application with the publication number of CN105603638A discloses a medical non-woven fabric, which is technically characterized by comprising a hemostatic antibacterial layer, wherein the hemostatic antibacterial layer comprises 30-60% of antibacterial fibers, 35-60% of water-absorbing fibers and 5-10% of polyethylene fibers, the antibacterial fibers are polypropylene fibers added with 30-55% of antibacterial agents, and the antibacterial agents comprise silver ions, chitosan and pseudo-ginseng; the medical non-woven fabric made of the composite material has certain hemostatic, antibacterial and anti-bonding effects. However, the composite material non-woven fabric in the technical scheme has relatively high requirements on the entanglement degree of different fibers in the processing process due to the fact that the composite material non-woven fabric is processed by adopting a plurality of fibers with different components, and the requirements on non-woven fabric processing cannot be met only by adopting the existing adding equipment.
Therefore, a new solution is needed to solve this problem.
Disclosure of Invention
The present invention aims to solve the above problems and provide a process for preparing an antibacterial medical nonwoven fabric, which enables the nonwoven fabric to have a certain antibacterial effect and is more suitable for use in the medical field.
The technical purpose of the invention is realized by the following technical scheme: an antibacterial medical non-woven fabric preparation process comprises the following steps:
step S1, preparing the non-woven fabric by adopting a preparation system, and sequentially opening, carding, lapping and spunlacing the composite raw material fibers to obtain the non-woven fabric;
step S2, drying the non-woven fabric obtained in the step S1, wherein the water content of the non-woven fabric is 20-30% after the drying;
step S3, washing and neutralizing the non-woven fabric obtained in the step S2 to ensure that the pH value of the non-woven fabric is 5.0-8.0;
step S4, drying the non-woven fabric obtained in the step S3, and controlling the water content to be 8-10%;
in step S5, the nonwoven fabric obtained in step S4 is cooled and rolled.
The invention is further provided that in step S1, the composite raw material fiber comprises 40-50% of antibacterial fiber, 40-50% of water-absorbing fiber and 10-15% of polyethylene fiber by mass percentage.
The invention is further configured that the antibacterial fiber is cellulose fiber or polypropylene fiber added with antibacterial agent, and the antibacterial agent comprises silver ions, chitosan and pseudo-ginseng.
The invention is further configured that the water-absorbing fibers are viscose fibers; treating viscose fiber by pouring a sodium hydroxide solution with the concentration of 4-9% into a dipping tank, then adding hydroxyethyl cellulose with the substitution degree of 0.3-0.5 to prepare a cellulose stock solution with the concentration of 0.5-1.5% of hydroxyethyl cellulose, and keeping the temperature of the cellulose stock solution at 20-25 ℃; and (3) soaking the viscose in a soaking tank, and rolling off the redundant cellulose stock solution by a padder.
The preparation system further comprises a spunlace device, the spunlace device comprises a conveying mesh belt, a plurality of spunlace components are arranged on the conveying mesh belt, and the plurality of spunlace components are uniformly distributed along the conveying direction of the conveying mesh belt.
The invention is further provided that the spunlace assembly comprises a spunlace head, a high-pressure liquid cavity is arranged in the spunlace head, and a filter pipe is arranged in the high-pressure liquid cavity; the high-pressure liquid cavity is internally provided with two guide plates which are arranged in an inverted cone shape, the lower end of the high-pressure liquid cavity is connected with a water outlet pipe, a flow limiting pipe is arranged in the water outlet pipe, the lower end of the flow limiting pipe is a necking end with a gradually reduced opening, the lower part of the flow limiting pipe is provided with a necking sleeve which is gradually reduced upwards, the necking sleeve is sleeved on the periphery of the necking end and elastically supports against the periphery of the necking end, an annular mixing cavity is formed among the water outlet pipe, the necking end of the flow limiting pipe and the necking sleeve, a mixing hole communicated with the flow limiting pipe and the mixing cavity is formed in the necking end, a feeding cavity is arranged on the periphery of the water outlet pipe, a feeding hole communicated with a feeding force and the mixing cavity is formed in the water outlet pipe, and the feeding cavity is communicated; the lower end of the water outlet pipe is connected with a water outlet tray, and a plurality of water outlet pipes communicated with the water outlet pipe are arranged on the water outlet tray.
The invention is further arranged in that a current-limiting piece is arranged in the necking end, the lower end of the current-limiting piece is provided with a current-limiting conical surface facing to the inner peripheral wall of the necking pipe, a gap is formed between the current-limiting conical surface and the inner wall of the necking end, and the current-limiting conical surface can be movably adjusted relative to the inner wall of the necking end.
The invention is further arranged that the flow limiting piece comprises a plug body and a sliding sleeve sleeved at the lower end of the plug body, the flow limiting conical surface is positioned on the sliding sleeve, the upper end of the plug body is fixedly connected with a guide pipe, the lower end of the guide pipe is communicated with a balance cavity in the plug body, and the upper end of the guide pipe upwards extends through the filter pipe and the upper wall of the flow collecting body to be communicated with the storage bin II; the plug is characterized in that a first through hole for communicating the voltage stabilizing cavity with the current limiting pipe is formed in the periphery of the plug body, and the sliding sleeve is connected to the plug body in a sliding mode and used for opening or closing the first through hole in the sliding mode.
The invention is further arranged in a way that the lower end of the plug body is provided with an inwards sunken piston hole, a piston piece is connected in the piston hole in a sliding way, and the piston piece is connected with the sliding sleeve through a connecting rod and used for driving the sliding sleeve to slide; a plurality of through holes II used for communicating with the balance cavity are formed in the side edge of the piston hole, a return spring used for pushing the piston piece upwards is arranged in the piston hole, and a cavity formed between the piston piece and the piston hole is communicated with the feed bin III through a connecting pipe; the connecting pipe extends out of the piston hole and penetrates through the guide pipe.
The invention also discloses an antibacterial medical non-woven fabric which comprises an antibacterial layer, wherein the antibacterial layer is prepared by adopting the preparation process.
In conclusion, the invention has the following beneficial effects:
the non-woven fabric is formed by spunlacing a plurality of fibers, so that the non-woven fabric has good flexibility and skin-friendly performance and meets the requirement of coating and isolation in the medical treatment process; the antibacterial fiber is doped in the non-woven fabric, so that the antibacterial clean type of the non-woven fabric in the coating use process can be improved, and the non-woven fabric can be used in medical environments with higher requirements on sterility; the water-absorbing fiber is added into the non-woven fabric, so that the non-woven fabric has good water-absorbing and water-controlling effects, and a part of water can be reserved in the non-woven fabric by matching with a medicament, ointment or wetting treatment, so that the medical coating requirement is met.
Drawings
FIG. 1 is a schematic structural view of a water needling apparatus in a preparation system of the present invention;
FIG. 2 is a schematic view of the configuration of a hydroentangling head assembly in the hydroentangling apparatus of the present invention;
FIG. 3 is a first schematic structural view of the flow restriction member of the present invention, showing a structure of the sliding sleeve when the sliding sleeve closes the through hole;
fig. 4 is a second structural schematic diagram of the flow restriction member of the present invention, to show a structure when the sliding sleeve opens the through hole.
Reference numerals: 1. a current collector; 2. a high pressure fluid chamber; 3. a baffle; 4. a filter tube; 5. a water outlet pipe; 6. a current limiting pipe; 7. a necking end; 8. a mixing hole; 9. a necking sleeve; 10. a mixing chamber; 11. a material spraying hole; 12. a feed cavity; 13. a feed pipe; 14. a water outlet tray; 15. a water spray pipe; 16. a flexible end; 17. a screw; 18. an expansion block; 19. a bearing; 20. a transmission gear; 21. a motor; 22. a flow restriction; 23. a conduit; 24. a current-limiting conical surface; 25. a plug body; 26. a sliding sleeve; 27. a first through hole; 28. a balancing chamber; 29. a piston bore; 30. a piston member; 31. a connecting rod; 32. a return spring; 33. a second through hole; 34. a connecting pipe; 35. a chamber; 36. a conveying mesh belt; 37. a hydroentangling assembly; 38. a water stabbing head; 39. and a guide roller.
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 one
The embodiment discloses a preparation process of an antibacterial medical non-woven fabric, which comprises the following steps:
step S1, preparing the non-woven fabric by adopting a preparation system, and sequentially opening, carding, lapping and spunlacing the composite raw material fibers to obtain the non-woven fabric;
step S2, drying the non-woven fabric obtained in the step S1, controlling the drying temperature to be 95-120 ℃, and after drying, controlling the water content to be 20-30%;
step S3, washing the non-woven fabric obtained in the step S2 with water for three times, and neutralizing with 3% acetic acid solution to ensure that the pH value of the non-woven fabric is 5.0-8.0;
step S4, drying the non-woven fabric obtained in the step S3, wherein the drying temperature is controlled to be 95-120 ℃, and the water content is controlled to be 8-10%;
in step S5, the nonwoven fabric obtained in step S4 is cooled and rolled.
In step S1, the composite raw material fiber comprises 40-50% of antibacterial fiber, 40-50% of water-absorbing fiber and 10-15% of polyethylene fiber in percentage by mass; wherein the antibacterial fiber is cellulose fiber or polypropylene fiber added with antibacterial agent, and the antibacterial agent comprises silver ion, chitosan and Notoginseng radix; the water-absorbing fiber is viscose fiber.
Before production, viscose fiber is pretreated, sodium hydroxide solution with the concentration of 4-9% is poured into an impregnation tank, then hydroxyethyl cellulose with the substitution degree of 0.3-0.5 is added to prepare cellulose stock solution with the concentration of 0.5-1.5% of the hydroxyethyl cellulose, and the temperature of the cellulose stock solution is kept at 20-25 ℃; and (3) soaking the viscose in a soaking tank, and rolling off the redundant cellulose stock solution by a padder.
The non-woven fabric is formed by spunlacing a plurality of fibers, so that the non-woven fabric has good flexibility and skin-friendly performance and meets the requirement of coating and isolation in the medical treatment process; the antibacterial fiber is doped in the non-woven fabric, so that the antibacterial clean type of the non-woven fabric in the coating use process can be improved, and the non-woven fabric can be used in medical environments with higher requirements on sterility; the water-absorbing fiber is added into the non-woven fabric, so that the non-woven fabric has good water-absorbing and water-controlling effects, and a part of water can be reserved in the non-woven fabric by matching with a medicament, ointment or wetting treatment, so that the medical coating requirement is met.
Example two
This example discloses another antibacterial medical nonwoven fabric preparation process, which is to prepare the nonwoven fabric in step S1 by using a preparation system on the basis of the first example, and is shown in fig. 1.
The preparation system comprises three groups of spunlace devices, each spunlace device comprises a conveying mesh belt 36, a plurality of spunlace components 37 are arranged on the conveying mesh belt 36, the plurality of spunlace components 37 are uniformly distributed along the conveying direction of the conveying mesh belt 36, and adjacent spunlace devices are connected through guide rollers 39 to convey non-woven fabrics.
When the non-woven fabric passes through the position between the conveying mesh belt 36 and the spunlace head 38, the spunlace head 38 can carry out spunlace treatment on fibers in the non-woven fabric, so that the fibers are entangled to form a stable fabric structure; the water thorn intensity in the middle of three group's water thorn devices reduces along with the conveying order of non-woven fabrics in proper order, make the beginning can carry out the water thorn through stronger water needle and handle, then reduce gradually, make the non-woven fabrics surface be rich in more smooth-going surface structure, can keep the entanglement stability between various spacing in the non-woven fabrics again, make the entanglement stability between the fibre better, can improve the stability of non-woven fabrics, the fibre after tangling is compacter, make the non-woven fabrics in follow-up absorption reagent or liquid medicine time, also can keep moist dressing whole more stable.
EXAMPLE III
The embodiment discloses another antibacterial medical non-woven fabric preparation process, which is described with reference to fig. 1-2 on the basis of the second embodiment, and the hydroentangling head 38 in the hydroentangling device is further optimized to improve the hydroentangling effect.
The spunlace device carries out spunlace through various fibers in the middle of the spunlace reagent to the non-woven fabrics, wherein establish high-pressure liquid chamber 2 in spunlace head 38, high-pressure liquid chamber 2 is the setting of the broad width direction of non-woven fabrics to set up filter tube 4 in high-pressure liquid chamber 2, the position of intaking in the middle of high-pressure liquid chamber 2 is located filter tube 4, makes filter tube 4 can filter the impurity in the middle of the spunlace reagent, avoids impurity in the middle of the spunlace reagent to block up spunlace head 38.
Two guide plates 3 which are inverted cones are arranged at the lower part of the high-pressure liquid cavity 2, the lower end of the high-pressure liquid cavity 2 is gradually reduced by the two guide plates 3, and the lower end of the high-pressure liquid cavity 2 is connected with a water outlet pipe 5 for outputting a spunlace reagent nearby the position.
The water outlet pipe 5 is internally provided with a flow limiting pipe 6, the lower end of the flow limiting pipe 6 is a reducing end 7 with a gradually reduced opening, the lower part of the flow limiting pipe 6 is provided with a reducing sleeve 9 which is gradually reduced upwards, the reducing sleeve 9 is sleeved on the periphery of the reducing end 7 and elastically supports against the periphery of the reducing end 7, so that a Venturi structure is formed at the lower end of the flow limiting pipe 6, and when a spunlace reagent flows downwards through the flow limiting pipe 6 and the reducing sleeve 9, a Venturi effect is generated at the position.
An annular mixing cavity 10 is formed among the water outlet pipe 5, the necking end 7 of the flow limiting pipe 6 and the necking sleeve 9, a mixing hole 8 communicated with the flow limiting pipe 6 and the mixing cavity 10 is formed in the necking end 7, and reagents in the mixing cavity 10 can be sucked under the action of a Venturi effect generated by the flow limiting pipe 6 and the necking sleeve 9; a feeding cavity 12 is arranged on the periphery of the water outlet pipe 5, a material spraying hole 11 communicated with the feeding intensity and the mixing cavity 10 is formed in the water outlet pipe 5, and the feeding cavity 12 is communicated with the first storage bin through a feeding pipe 13, so that a first reagent in the first storage bin can be mixed with a spunlace reagent under the action of a Venturi effect;
the spunlace reagent contains acetic acid, so that the spunlace reagent is weakly acidic, a sodium bicarbonate solution is contained in the storage bin I, a part of the sodium bicarbonate solution can be mixed into the spunlace reagent under the action of a Venturi effect, and the sodium bicarbonate can release carbon dioxide gas under the action of the acidic spunlace reagent to form tiny bubbles, so that the pressure is increased to a certain degree; the air bubbles are very tiny and can be mixed into the spunlace reagent, so that certain air bubbles exist in the ejected spunlace reagent, and the ejected water needle is controlled to have a certain width, so that the air bubbles are mixed in the ejected water needle, and the ejection stability is kept; and because the bubble very much in the middle of the water thorn reagent of sneaking into, when the water needle assaults the fibre on non-woven fabrics surface, can produce and break to make the puncture of water needle spout and can promote the entanglement effect to between the fibre, thereby improve the entanglement degree between each fibre in the non-woven fabrics, promote fibrous closely knit nature.
The lower end of the water outlet pipe 5 is connected with a water outlet disc 14, the water outlet disc 14 is provided with a plurality of water spray pipes 15 communicated with the water outlet pipe 5, the water spray pipes 15 are distributed in a circumferential array, and the lower end of the water outlet pipe 5 is a flexible end 16 with certain elasticity;
an expansion block 18 is arranged in the middle of each water outlet pipe 5, the peripheral surface of the expansion block 18 is an inverted cone-shaped expansion block 18, the flexible end 16 elastically presses against the periphery of the expansion block 18 and inclines outwards, and the inclined and outwards-inclined flexible end 16 can downwards spray water needles facing to multiple directions, so that the fibers in the non-woven fabric can be entangled in multiple directions when the water needles are used for carrying out spunlace injection on the non-woven fabric, and the fibers in the non-woven fabric can be subjected to larger position deviation when being sprayed by the inclined water needles; and the position of the hydroentangling head 38 in each group of the hydroentangling devices has a certain position deviation, and the nonwoven fabrics are uniformly subjected to hydroentanglement entanglement in different positions through different hydroentangling devices, so that the entanglement degree of the hydroentangling on the fibers in the nonwoven fabrics can be improved, and the dense uniformity of the fibers in the nonwoven fabrics can be maintained.
The distance between the expansion block 18 and the water outlet disc 14 is adjustable, the lower part of the water outlet disc 14 is connected with a screw rod 17, the expansion block 18 is in threaded connection with the screw rod 17, certain elastic pushing can be generated on the flexible end 16 at the lower end of the water spray pipe 15 in the process of threaded adjustment, and the inclination degree of the flexible end 16 can be adjusted; in the water thorn in-process, the degree of inclination of the flexible end 16 of three group water thorn devices of control work as well, the size is different, flexible end 16 inclination in the first group is the biggest, flexible end 16 inclination is the minimum in the third group, make water thorn process line carry out the water thorn through great inclination to the fibre in the middle of the non-woven fabrics, make the non-woven fabrics have more stability and closely knit, and reduce along with subsequent water thorn angle, the impact of water needle to fibre reduces at the horizontal direction, and increase in the thickness direction of non-woven fabrics, thereby can be more stable and closely knit at the ascending fibre entanglement of thickness direction.
Example four
The embodiment discloses another antibacterial medical non-woven fabric preparation process, which is described with reference to fig. 1 to 2 on the basis of the third embodiment, and the spunlace device is further optimized to improve the spunlace effect.
The water outlet disc 14 is set to be a rotatable and adjustable structure, the water outlet disc 14 is rotatably connected to the lower end of the water outlet pipe 5 and is sealed through a sealing element, so that the smooth circulation of the spunlace reagent is ensured; a bearing 19 is arranged at the lower part of the current collector 1, the current collector is rotatably supported by the bearing 19 through the movement of the water outlet disc 14, a motor 21 is arranged at one side of the water outlet disc 14, the motor 21 is used as a driving piece, a transmission gear 20 is arranged at the output end of the motor 21, and the transmission gear 20 is in meshing transmission with a gear at the periphery of the water outlet disc 14.
In the spunlace treatment process, the motor 21 can drive the water outlet disc 14 to rotate, so that the spunlace direction is increased in the spunlace process, the entanglement degree of fibers intertwined with each other can be improved through rotation adjustment, and the strength and the compaction effect of the non-woven fabric are further improved; and the rotating speed of the water outlet tray 14 in each group of the spunlace devices is adjusted, wherein the water outlet tray 14 in the first group of the spunlace devices rotates fastest, and the water outlet tray 14 in the third group of the spunlace devices rotates slowest, so that the entanglement strength of the spunlace can be improved in the initial process, the control of the interlacing degree of the penetration of the water needles on the surface fibers of the non-woven fabric is gradually reduced along with the conveying of the non-woven fabric, the effect of spacing carding on the surface of the non-woven fabric is achieved, the fibers of the non-woven fabric can keep certain winding stability, and the stability and smoothness of the fibers on the surface layer of the non-woven.
EXAMPLE five
The embodiment discloses another antibacterial medical non-woven fabric preparation process, which is described with reference to fig. 1 to 4 on the basis of the third embodiment, and the spunlace device is further optimized to improve the spunlace effect. The pH value of the spunlace reagent is adjusted by simultaneously injecting the acid solution into the necking pipe, so that the spunlace reagent can maintain acidity, and the reaction efficiency with the sodium bicarbonate solution is improved.
A current-limiting piece 22 is arranged in the necking end 7, a current-limiting conical surface 24 facing to the inner peripheral wall of the necking pipe is arranged at the lower end of the current-limiting piece 22, a gap is formed between the current-limiting conical surface 24 and the inner wall of the necking end 7, and the current-limiting conical surface 24 can be movably adjusted relative to the inner wall of the necking end 7.
The flow limiting piece 22 specifically comprises a plug body 25 and a sliding sleeve 26 sleeved at the lower end of the plug body 25, the flow limiting conical surface 24 is positioned on the sliding sleeve 26, the upper end of the plug body 25 is fixedly connected with a guide pipe 23, the lower end of the guide pipe 23 is communicated with a balance cavity 28 in the plug body 25, and the upper end of the guide pipe 23 extends upwards to extend through the upper wall of the filter pipe 4 and the fluid collecting body 1 to be communicated with the storage bin II; the periphery of the plug body 25 is provided with a first through hole 27 for conducting the voltage stabilizing cavity and the current limiting pipe 6, and the sliding sleeve 26 is connected to the plug body 25 in a sliding mode and can open or close the first through hole 27 during sliding.
The acetic acid solution is stored in the second storage bin, the acidity of the storage bin is larger than that of the spunlace reagent, the acetic acid solution can be conveyed into the pressure stabilizing cavity through the conveying pipe 23, the first through hole 27 can penetrate from the pressure stabilizing cavity to flow out to the inner position of the necking end 7 of the flow limiting pipe 6, the decomposition reaction rate of sodium bicarbonate is increased, the release of carbon dioxide gas is accelerated, the pressure of the spunlace head 38 during spraying can be enhanced, the bubble content of the spunlace needle is sprayed, and the entanglement degree of fibers in the spunlace nonwoven fabric is improved.
The guide pipe 23 is rotatably connected with the current collector 1, the guide pipe 23 and the filter pipe 4 are guided and slid through a shaft sleeve, and the upper end of the guide pipe 23 is driven through a rotating structure and an external driving mechanism, such as a motor 21; thereby can drive the rotation to current-limiting piece 22, can drive and mix various reality through the rotation of current-limiting piece 22, thereby make the sodium bicarbonate reaction more abundant and disperse, thereby maintain the stability of water thorn needle injection, avoid the gas in the middle of the reagent too concentrated and produce the unstable condition of water thorn injection, in order to improve the stirring mixed effect of current-limiting piece 22, can set up paddle (not shown in the figure) in the sheath outside of current-limiting piece 22, in order to increase the stirring mixed degree of current-limiting piece 22 to individual reagent, improve gaseous homogeneity and the stability of producing and releasing.
The lower end of the plug body 25 is provided with an inwardly sunken piston hole 29, a piston piece 30 is connected in the piston hole 29 in a sliding manner, and the piston piece 30 is connected with the sliding sleeve 26 through a connecting rod 31 and used for driving the sliding sleeve 26 to slide; the chamber 35 formed between the piston member 30 and the piston hole 29 is communicated with the bin three through a connecting pipe 34, the connecting pipe 34 extends out of the piston hole 29 and penetrates through the guide pipe 23, and the upper end of the connecting pipe 34 extends out of a rotary joint at the upper end of the guide pipe 23 and is sealed in a rotary mode through a sealing member. The rotary joint comprises an upper tap pipeline and a lower tap pipeline, the two parts can rotate, the two joint pipelines are connected and sealed through a sealing piece, so that the two joint pipelines can keep sealed, the upper joint pipeline is fixedly supported by a support and connected with an input source, the lower tap pipeline is connected with a pipe body to be connected, the lower tap pipeline can rotate, and the connecting pipe 34 can penetrate through the two tap pipelines from bottom to top, so that the rotation of the guide pipe 23 is not influenced.
An acidic acetic acid reagent is also introduced into the connecting pipe 34, and the pressure is increased through a booster pump; the side of the piston hole 29 is provided with a second through hole 33, the second through hole 33 is communicated with the balance cavity 28 and the inner cavity of the piston hole 29, and the piston hole 29 is also internally provided with a return spring 32, and the return spring 32 can push the piston piece 30 to slide upwards for return.
By adjusting the pressure in the connecting tube 34, the piston member 30 can be pushed and the sliding sleeve 26 can be driven to move; when the pressure in the connecting pipe 34 is small, the pushing force of the hydraulic pressure on the piston member 30 is smaller than the elasticity of the return spring 32, and the piston member 30 is pushed by the return spring 32 to be pressed against the uppermost end of the piston hole 29;
when the hydraulic pressure in the connecting pipe 34 is increased, the hydraulic pressure starts to overcome the reset spring 32 to push the piston member 30 and the sliding sleeve 26 to move downwards, at the moment, the sliding sleeve 26 opens the first through hole 27 on the plug body 25, the piston member 30 still seals the second through hole 33, only the reagent in the pressure stabilizing cavity flows out of the first through hole 27 to be sprayed outwards, and at the moment, the spraying hole in the necking end 7 generates opposite-flushing spraying, so that the reaction between the sodium bicarbonate and the acid reagent is increased, the release efficiency of the carbon dioxide is improved, the stability of the pH value in the spunlace reagent can be maintained through the supplement of the acid reagent, and the influence on the release of the carbon dioxide gas in the sodium bicarbonate caused by the overlow acidity of the spunlace reagent due to the repeated use of the spun; thereby improving the content of gas in the sprayed spunlace reagent, maintaining a certain pressure and improving the stability and effect of spunlace;
when the hydraulic pressure in the connecting pipe 34 is further increased, the hydraulic pressure further overcomes the return spring 32 to push the piston member 30 and the sliding sleeve 26 to move downwards, so that the first through hole 27 on the plug body 25 is opened more, and the second through hole 33 on the piston cavity is also opened by the piston member 30, and the acidic solution with certain high pressure can increase the injection amount of the acidic reagent outside the flow limiting member 22, so that the reaction rate of the sodium bicarbonate is further increased, the acidity and alkalinity in the spunlace process are adjusted, and the dressing reagent is maintained in a relatively neutral acid-base environment.
EXAMPLE six
The embodiment also discloses an antibacterial medical non-woven fabric which is prepared by the preparation method in the embodiment, and the non-woven fabric is formed by spunlacing a plurality of fibers, so that the non-woven fabric has good softness and skin-friendly performance and meets the requirement of coating and isolation in the medical process; the antibacterial fiber is doped in the non-woven fabric, so that the antibacterial clean type of the non-woven fabric in the coating use process can be improved, and the non-woven fabric can be used in medical environments with higher requirements on sterility; the water-absorbing fiber is added into the non-woven fabric, so that the non-woven fabric has good water-absorbing and water-controlling effects, and a part of water can be reserved in the non-woven fabric by matching with a medicament, ointment or wetting treatment, so that the medical coating requirement is met.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. An antibacterial medical non-woven fabric preparation process comprises the following steps:
step S1, preparing the non-woven fabric by adopting a preparation system, and sequentially opening, carding, lapping and spunlacing the composite raw material fibers to obtain the non-woven fabric;
step S2, drying the non-woven fabric obtained in the step S1, wherein the water content of the non-woven fabric is 20-30% after the drying;
step S3, washing and neutralizing the non-woven fabric obtained in the step S2 to ensure that the pH value of the non-woven fabric is 5.0-8.0;
step S4, drying the non-woven fabric obtained in the step S3, and controlling the water content to be 8-10%;
in step S5, the nonwoven fabric obtained in step S4 is cooled and rolled.
2. The process for preparing an antibacterial medical non-woven fabric according to claim 1, wherein in step S1, the composite raw material fiber comprises, by mass, 40-50% of antibacterial fiber, 40-50% of water-absorbing fiber and 10-15% of polyethylene fiber.
3. The process for preparing an antibacterial medical non-woven fabric according to claim 2, wherein the antibacterial fiber is cellulose fiber or polypropylene fiber added with an antibacterial agent, and the antibacterial agent comprises silver ions, chitosan and pseudo-ginseng.
4. The process for preparing antibacterial medical non-woven fabric according to claim 2, wherein the water-absorbing fiber is viscose; treating viscose fiber by pouring a sodium hydroxide solution with the concentration of 4-9% into a dipping tank, then adding hydroxyethyl cellulose with the substitution degree of 0.3-0.5 to prepare a cellulose stock solution with the concentration of 0.5-1.5% of hydroxyethyl cellulose, and keeping the temperature of the cellulose stock solution at 20-25 ℃; and (3) soaking the viscose in a soaking tank, and rolling off the redundant cellulose stock solution by a padder.
5. The process for preparing antibacterial medical non-woven fabric according to claim 1, wherein the preparation system comprises a spunlace device, the spunlace device comprises a conveying mesh belt (36), a plurality of spunlace assemblies (37) are arranged on the conveying mesh belt (36), and the plurality of spunlace assemblies (37) are uniformly arranged along the conveying direction of the conveying mesh belt (36).
6. The process for preparing antibacterial medical non-woven fabric according to claim 5, wherein the spunlace component (37) comprises a spunlace head (38), a high-pressure liquid cavity (2) is arranged in the spunlace head (38), and a filter pipe (4) is arranged in the high-pressure liquid cavity (2); the high-pressure liquid cavity (2) is internally provided with two guide plates (3) which are arranged in an inverted cone shape, the lower end of the high-pressure liquid cavity (2) is connected with a water outlet pipe (5), the water outlet pipe (5) is internally provided with a flow limiting pipe (6), the lower end of the flow limiting pipe (6) is a reducing end (7) with a gradually reduced opening, the lower part of the flow limiting pipe (6) is provided with a reducing sleeve (9) which is gradually reduced upwards, the reducing sleeve (9) is sleeved on the periphery of the reducing end (7) and elastically pressed against the periphery of the reducing end (7), an annular mixing cavity (10) is formed among the water outlet pipe (5), the reducing end (7) of the flow limiting pipe (6) and the reducing sleeve (9), the reducing end (7) is provided with a mixing hole (8) communicated with the flow limiting pipe (6) and the mixing cavity (10), the periphery of the water outlet pipe (5) is provided with a, the water outlet pipe (5) is provided with a material spraying hole (11) communicated with the feeding intensity and mixing cavity (10), and the feeding cavity (12) is communicated with the first storage bin through a feeding pipe (13); the lower end of the water outlet pipe (5) is connected with a water outlet tray (14), and a plurality of water outlet pipes (5) communicated with the water outlet pipe (5) are arranged on the water outlet tray (14).
7. The process for preparing the antibacterial medical non-woven fabric according to claim 6, wherein a flow limiting piece (22) is arranged in the necking end (7), a flow limiting conical surface (24) facing to the inner peripheral wall of the necking tube is arranged at the lower end of the flow limiting piece (22), a gap is formed between the flow limiting conical surface (24) and the inner wall of the necking end (7), and the flow limiting conical surface (24) can be movably adjusted relative to the inner wall of the necking end (7).
8. The process for preparing the antibacterial medical non-woven fabric according to claim 7, wherein the flow limiting member (22) comprises a plug body (25) and a sliding sleeve (26) sleeved at the lower end of the plug body (25), the flow limiting conical surface (24) is positioned on the sliding sleeve (26), the upper end of the plug body (25) is fixedly connected with a guide pipe (23), the lower end of the guide pipe (23) is communicated with a balance cavity (28) in the plug body (25), and the upper end of the guide pipe (23) extends upwards to pass through the upper wall of the filter pipe (4) and the fluid collecting body (1) to be communicated with a storage bin; the plug is characterized in that a first through hole (27) for conducting a voltage stabilizing cavity and the current limiting pipe (6) is formed in the periphery of the plug body (25), and the sliding sleeve (26) is connected to the plug body (25) in a sliding mode and used for opening or closing the first through hole (27) during sliding.
9. The process for preparing antibacterial medical non-woven fabric according to claim 8, wherein a piston hole (29) which is recessed inwards is formed at the lower end of the plug body (25), a piston piece (30) is connected in the piston hole (29) in a sliding manner, and the piston piece (30) is connected with the sliding sleeve (26) through a connecting rod (31) and used for driving the sliding sleeve (26) to slide; a plurality of through holes II (33) used for being communicated with the balance cavity (28) are formed in the side edge of the piston hole (29), a return spring (32) used for pushing the piston piece (30) upwards is arranged in the piston hole (29), and a cavity (35) formed between the piston piece (30) and the piston hole (29) is communicated with the feed bin III through a connecting pipe (34); the connecting pipe (34) extends out of the piston hole (29) and penetrates through the guide pipe (23).
10. An antibacterial medical nonwoven fabric, characterized by comprising an antibacterial layer, wherein the antibacterial layer is prepared by the preparation process as claimed in any one of claims 1 to 9.
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