CN103463670B - Wound dressing containing fibers with low smelting point and production method thereof - Google Patents
Wound dressing containing fibers with low smelting point and production method thereof Download PDFInfo
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Abstract
The invention relates to a wound dressing containing fibers with a low smelting point and a production method thereof. The wound dressing is prepared from a blended material containing the fibers with a low smelting point and polysaccharide fibers by a non-weaving process, wherein the smelting point of the fibers with a low smelting point is in a range of 90-180 DEG C. After the fibers with a low smelting point are subjected to heat treatment, smelted points are formed among the fibers, so that the strength of the wound dressing is improved.
Description
Technical field
The disclosure relates to staple fibre and non-woven field, particularly relates to wound dressing and manufacture method thereof.
Background technology
The wound dressing of current high moisture absorption on the market, especially fiber wound dressing, is mainly made up of polysaccharide fiber, as calcium alginate wound dressing, Chitosan in Wound Dressing, modified cellulose wound dressing etc.The feature of these dressing has higher hygroscopicity and moisture retention.Can gel be formed after absorbing wound exudate, thus provide a moistening environment for wound healing.
The feature of high moisture-retentive dressings is its hygroscopicity and moisture retention.Its high-hygroscopicity mainly becomes colloidality because the fiber in dressing has very high water suction.Fiber changes colloid or hemicolloid into after meeting water, absorbs a large amount of liquid.The another one characteristic of this dressing is exactly that intensity (wet strength) after its moisture absorption is low.For the purpose of clear and definite, this glue fiber that absorbs water into is called gelatinous fibre in this application.
As everyone knows, wound dressing will often be changed.If dressing moisture absorption plastic, wet strength is low, is unfavorable for that the full wafer of dressing is removed and changed, increases the working strength of nursing staff.Particularly those cave type wounds, the wet strength of dressing just more seems important.
A kind of dressing of nursing cave type wound of U.S. Patent application US2009/0287130A1 specialized designs.This dressing is elongate strip, is prepared through nonwovens process by gelatinous fibre (such as modified cellulose fibre).This dressing has another non-gelatinous fibre yarn to weave, for strengthening the intensity of dressing in the positive and negative repeated localised puncture of dressing along its length with laterally.The advantage of this method is the intensity significantly improving dressing, particularly wet strength.But this puncture braiding must again through knitting process after non-woven operation, and operation is long and cost is high.
More satisfactory method is the non-gelatinous fibre of direct blending in non-woven operation, to improve dressing strength.Such as, European patent application EP 0740554 and U.S. Patent application US6471982 disclose the fiber dressing that a kind of gelatinous fibre (as alginic acid fibre) obtains with the blending of common non-gelatinous fibre (as cellulose fibre).Although the starting point of this two pieces application reduces costs, owing to employing non-gelatinous fibre, objectively also serve the effect improving wet strength.U.S. Patent application US7385101 is similar, and just its non-gelatinous fibre has plated silver-colored nylon fiber.This dressing contains antibacterial silver, can be used for the process of infected wound.
Fiber in these dressing is present in dressing independently of one another, do not formed each other and interact with the intensity increasing dressing further.
Summary of the invention
Embodiments more of the present disclosure provide a kind of non-weaving cloth, and it is made up of the blend comprising low-melting fiber and polysaccharide fiber.
In some embodiments, polysaccharide fiber is selected from: one or more in calcium alginate fibre, calcium alginate/sodium fiber, cellulose fibre, chitin fiber, modified cellulose fibre and modified chitosan fiber.
In some embodiments, low-melting fiber is selected from: one or more in polyethylene/polypropylene (PE/PP) bicomponent fibre, polyethylene/polyester (PE/PET) bicomponent fibre, polyamide/polyester (PA/PET) bicomponent fibre, polypropylene (PP) fiber, polyamide (PA) fiber and polyethylene (PE) fiber.
In non-weaving cloth, fiber is close to all each other, and these contacts site just provide chance for bonding after fibers melt.Once hot conditions does not exist (such as shifting out from baking oven), puddle solidifies again, between the fiber contacted with each other, form interfibrous clinkering point.Numerous such clinkering point provides a firm space three-dimensional structure to non-weaving cloth, adds the intensity of non-weaving cloth.When running into liquid, gelatinous fibre plastic, but the clinkering point of low-melting fiber (between non-gelatinous fibre) still exists, and maintains the wet strength of non-weaving cloth.
In some embodiments, the fusing point of low-melting fiber is between 90-180 DEG C.It will be appreciated by those skilled in the art that fusing point be material by solid state transformation is liquid temperature.Strictly, fusing point is not a point value, but a temperature range, be called melting range.Two limits of melting range are called initial melting temperature and whole melting temperatur, and initial melting temperature and material start the temperature melted, the temperature that whole melting temperatur and material melt completely.Often kind of compound has a fixing fusing point, namely under a certain pressure from the temperature range being just fused to fine melt.Therefore, in disclosure context, although fusing point represents with a concrete point value, it covers melting range interval.
In some embodiments, low-melting fiber, through high-temperature process, starts when reaching fusing point melting occurs, and after temperature reduces, the part of melting is solidified again, thus forms clinkering point each other between the low-melting fiber contacted with each other.
Low-melting fiber on the market has polyethylene/polypropylene (PE/PP) bicomponent fibre, polyethylene/polyester (PE/PET) bicomponent fibre, polyamide/polyester (PA/PET) bicomponent fibre, polypropylene (PP) fiber, polyamide (PA) fiber and polyethylene (PE) fiber.Such as PE/PP bicomponent fibre can realize partial melting at 140 degrees centigrade.Some PA/PET bicomponent fibre just can realize partial melting at 125 degrees centigrade.The fusing point of some fiber is also lower, as PP fiber, only has 160 degrees centigrade.The fusing point of some PA fibers can accomplish 85 degrees Celsius.
The ratio of this low-melting fiber in non-weaving cloth will suitably control.In some embodiments, the ratio by mass of low-melting fiber in non-weaving cloth is between 2-85%.In some embodiments, between 2-55%.In some embodiments, between 2-45%.The present inventor finds, the too low then intensity of ratio increases DeGrain, and then moisture absorbability and moisture retentivity is affected too much.Have little effect lower than 2% intensity increase, greatly reduce higher than 85% hygroscopicity.
Those skilled in the art can select polysaccharide fiber according to the purposes of non-weaving cloth.In some embodiments, if wish that fiber can calcium ion contributing functions, then calcium alginate fibre or calcium alginate to be used to receive fiber.Calcium alginate content in calcium alginate fibre is in 90% or more (by weight), and sodium alginate content is below 10%.The calcium alginate content (by weight) below 90% that calcium alginate is received in fiber, sodium alginate content is more than 10%.
In some embodiments, if need that there is certain biocidal property or anthemorrhagic performance, then can use chitosan or modified chitosan fiber, modified chitosan fiber be by chitin fiber in addition chemical modification its hygroscopicity is greatly improved.Modified chitosan fiber includes but not limited to acylation chitosan, carboxymethyl chitosan fiber.Due to the chemical constitution of its uniqueness, chitin fiber or modified chitosan fiber have the unexistent biocidal property of other fiber and hemostatic.
In some embodiments, to some purposes, hygroscopicity and moisture retention remain major function, and polysaccharide fiber can select modified cellulose, modified cellulose fibre be by cellulose fibre in addition chemical modification its hygroscopicity is greatly improved.Modified cellulose fibre includes but not limited to carboxymethyl cellulose fiber, carboxyethylcellulose cellulose fiber or water-fast cellulose alkyl sulfonic acid modified cellulose fibre.These fibers can absorb large quantity of fluid.Test shows that this kind of material can up to 2500% to the absorbability of distilled water.The gelation of this fibrid is good, but its wet strength is very low.In some embodiments, two or more polysaccharide fiber can also be used as required in non-weaving cloth, as chitosan and calcium alginate fibre; Or chitosan and modified cellulose fibre.
Because the clinkering point between low-melting fiber enhances the intensity of non-weaving cloth, therefore any polysaccharide fiber all can have benefited from this.Technical staff can select alginate fiber, concrete modified cellulose or modified chitosan fiber voluntarily according to the purposes of common practise and non-weaving cloth.
In some embodiments, in order to obtain antibiotic property, the one in polysaccharide fiber or low-melting fiber or both can contain antibacterial.The type of antibacterial mainly contains silver, silver compound, silver-colored network and thing, PHMB, Mel etc.
In some embodiments, the antibacterial used in non-weaving cloth of the present disclosure is silver.The method adding silver in polysaccharide fiber is well known in the art, such as in polysaccharide fiber spinning solution, add antibacterial, as silver nitrate, silver chloride, Disilver carbonate, phosphoric acid hydrogen zirconium sodium silver (Silver SodiumZirconium Hydrogen phosphate), just containing antibacterial in fiber so after it has been manufactured.In contg. silver fiber prepared by this mode, silver content is by weight at 0.001%-10%.At fiber surface spraying argentiferous liquid, as sprayed nanometer silver solution at fiber surface, the silver content of this mode is between 0.001%-1%.Silver-plated at fiber surface, the silver content of this mode is between 0.1%-25%.Fiber is immersed in Ag-containing solution, make silver be attached on fiber surface or with processbearing astrocyte chemical bond, the silver content of this mode is between 0.001%-2.5%.
Many silver-containing materials are at high temperature stable.Therefore, also by antibacterial in the preparation process of low-melting fiber, as silver chloride, Disilver carbonate, phosphoric acid hydrogen zirconium sodium silver, can be added in fiber.
All fibres can use some oil preparationes or surfactant, and this is mainly convenient in order to subsequent production, has no significant effect non-weaving cloth function.
The present inventor finds unexpectedly, and when non-weaving cloth of the present disclosure is after processing further, can obtain a kind of wound dressing, it has the intensity of improvement, especially wet strength.Given this, some embodiments of the disclosure provide a kind of wound dressing, its by non-weaving cloth is cut, packs and sterilizing obtain.Wound dressing can be made any size, any form by those skilled in the art.
Embodiments more of the present disclosure provide a kind of wound dressing, and it is made up of the blend comprising low-melting fiber and polysaccharide fiber.Fusing point during a low-melting fiber atmospheric pressure is between 90-180 DEG C.
In the wound dressing of some embodiments of the disclosure, all or between the low-melting fiber of local form clinkering point.
In some embodiments, in wound dressing, the fibre length of polysaccharide fiber and low-melting fiber is 3-105 millimeter.In some embodiments, in wound dressing, the fineness of polysaccharide fiber and low-melting fiber is 1-10dtex.
In some embodiments, the content of low-melting fiber in wound dressing is by weight between 2-85%; In some embodiments, 2-55% it; In some embodiments, between 2-45%.The content of polysaccharide fiber in wound dressing is by weight between 15-98%; In some embodiments, between 45-98%; In some embodiments, between 55-98%.
In some embodiments, polysaccharide fiber is selected from: one or more in calcium alginate fibre, calcium alginate/sodium fiber, cellulose fibre, chitin fiber, modified cellulose fibre, modified chitosan fiber.In some embodiments, low-melting fiber is selected from: one or more in polyethylene/polypropylene bicomponent fibre, polyethylene/polyester bi-component fibers, polyamide/polyester bicomponent fibre, polypropylene fibre, Fypro and polyethylene fibre.
In some embodiments, in wound dressing, polysaccharide fiber is also containing the antibacterial accounting for fibre weight 0.001-25%, and antibacterial is selected from: one or more in silver, silver compound, silver-colored network and thing, PHMB and Mel.
In some embodiments, in wound dressing, low-melting fiber is also containing the antibacterial accounting for fibre weight 0.001-25%, and antibacterial is selected from: one or more in silver, silver compound, silver-colored network and thing, PHMB.
In some embodiments, wound dressing is single layer structure.
In other embodiments, wound dressing is multiple structure.Multiple structure is replaced to superpose with the stratum reticulare comprising low-melting fiber by the stratum reticulare comprising polysaccharide fiber to be made, and is formed and interweaves, all or between the low-melting fiber of local form clinkering point between stratum reticulare.
Some embodiments of the disclosure provide a kind of manufacture method containing the non-weaving cloth of polysaccharide fiber and low-melting fiber, and it comprises step:
Two kinds of fibers are mixed in proportion;
Shredding;
Combing;
Become net; With
Cheng Bu,
It is characterized in that, one-tenth cloth while or comprise heat treated step afterwards.
In some embodiments, after fiber becomes net, can directly through being heat-treated to cloth.But under most cases, make it into after cloth through needling process, reheating process forms clinkering point between fiber.
In some embodiments of the disclosure, polysaccharide fiber and low-melting fiber are short fibers.In some embodiments, the length of polysaccharide fiber and low-melting fiber is between 3-105 millimeter.Some technique uses comparatively short fiber, and as Airlay technique, its fibre length can be short to several millimeters.But some technique, fibre length must be in certain limit, such as more than 38 millimeters.
Fibre fineness depends primarily on the feel of final non-weaving cloth and the setting of process equipment, in some embodiments, uses the fineness of 1-10dtex.
Some embodiments of the disclosure provide a kind of manufacture method containing the non-weaving cloth of polysaccharide fiber and low-melting fiber, and it comprises step:
1) by low-melting fiber and polysaccharide fiber shredding respectively;
2) combing respectively;
3) net is become respectively;
4) will the stratum reticulare of low-melting fiber be comprised and comprise the stratum reticulare alternately superposition of polysaccharide fiber;
5) between stratum reticulare, intertexture is formed; With
6) cloth is become,
It is characterized in that, one-tenth cloth while or comprise heat treated step afterwards.
In some embodiments, non-weaving cloth is processed into single layer structure, is mixed in proportion with low-melting fiber by polysaccharide fiber, shredding, then together with combing, become net and be heat-treated to cloth.Owing to being distributed with low-melting fiber in non-weaving cloth, therefore between all or part of fiber, there is clinkering point after heat treatment, enhance the intensity of non-weaving cloth.
In other embodiments, non-weaving cloth is processed into multiple structure, namely independent to polysaccharide fiber and low-melting fiber shredding, combing with become net, right latter two stratum reticulare superposition forms multiple structure.This Multi-layered non-woven cloth can be two-layer, and wherein one deck is polysaccharide fiber, and one deck is low-melting fiber in addition.Again through acupuncture after two kinds of material into the net (stratum reticulare) superpositions, make two-layer few fibers be punctured to opposite one deck respectively and form intertexture, then through heat treatment, form clinkering point.
This multiple structure also can be three layers even more multi-layered.Such as, the two-layer of outside is polysaccharide fiber, and middle one deck is low-melting fiber.Three-layer network is stacked add after again through acupuncture, make the few fibers of three layers be punctured to other two-layer formation respectively and interweave, and then through heat treatment, form clinkering point.
Another form of three-decker is that polysaccharide fiber is placed on centre, and two outside layers is low-melting fiber.Three-layer network is stacked add after again through acupuncture, make the few fibers of three layers be punctured to other two-layer formation respectively and interweave, and then through heat treatment, form clinkering point.
The purposes of non-weaving cloth widely, such as, for medical cloth: operating coat, protective garment, mask, diaper etc.; For industrial cloth: filtering material, insulant, cement package bags, geotextiles, coated cloth etc.; For agricultural fabric: crop protection cloth, seedling cloth, insulation curtain etc.; For other: heat-insulating and noise-insulating material, asphalt felt etc.
In some embodiments, non-weaving cloth of the present disclosure is applicable to medical product, is particularly useful for wound dressing.Therefore, some embodiments of the disclosure provide the purposes of non-weaving cloth of the present disclosure for the manufacture of wound dressing.
In order to meet the requirement of medical industry, becoming after cloth, can also comprise: cut, pack or arbitrary step in sterilizing or multiple step.
Some embodiments of the disclosure provide a kind of manufacture method of wound dressing, and it comprises step:
1) by low-melting fiber and polysaccharide fiber Homogeneous phase mixing;
2) shredding;
3) combing;
4) net is become;
5) cloth is become;
6) cut;
7) pack; With
8) sterilizing,
In some embodiments, one-tenth cloth while or comprise heat treated step afterwards.
Some embodiments of the disclosure provide a kind of manufacture method of wound dressing, and it comprises step:
1) by low-melting fiber and polysaccharide fiber shredding respectively;
2) combing respectively;
3) net is become respectively;
4) will the stratum reticulare of low-melting fiber be comprised and comprise the stratum reticulare alternately superposition of polysaccharide fiber;
5) between stratum reticulare, intertexture is formed;
6) cloth is become;
7) cut;
8) pack; With
9) sterilizing,
In some embodiments, one-tenth cloth while or comprise heat treated step afterwards.
Can be that material is placed in the device (as baking oven) of a temperature-controllable to the heat treated mode of material, maintain certain hour, also can be allow material quickly through the controlled baking oven of a temperature Rate, make material just make to be formed between low-melting fiber to melt node in the time of baking oven.
Another mode heat treated is by material hot pressing, namely has the pressing plate of certain surface temperature or the pressure roller of rotation, keeps certain pressure, maintains certain temperature and time, the low-melting fiber in material is formed and melts node.In addition this pressing plate or roller surface can be figuratum, are having protruding part like this, material because of pressurized, be heated and formed at these positions and melt node.Therefore the dressing with hot pressing pattern is formed.
Another heat treatment mode is ultrasound wave.Utilize hyperacoustic high frequency to make low-melting fiber partial melting, the object improving wet strength can be realized equally.In addition, ultrasound wave mode also can form pattern.This pattern can be rhombus, circular, triangle, spot distribution and other special patterns.
In some embodiments, heat treatment comprises step: melting temperature i) non-weaving cloth being placed in low-melting fiber, keeps certain hour, preferred 1-3 minute; Ii) ambient temperature is cooled to;
In other embodiments, heat treatment comprises step: i) non-weaving cloth is placed in the certain hour that to pressurize between a pair pressure roller, preferred 1-3 minute, sheeting roll surface temperature reaches the fusing point of low-melting fiber; Ii) ambient temperature is cooled to.
In some embodiments, sterilization method can be 60Coradiation sterilizing, and also can be ethylene oxide sterilizing, technical staff can determine sterilization method as required voluntarily.
Accompanying drawing explanation
Fig. 1: the device of test disclosure non-weaving cloth or dressing wet strength.
1: test sample; 2: container; 3: test liquid; 4: specimen holder.
Fig. 2: after modified cellulose fibre and PE/PP bicomponent fibre blending heat treatment, the clinkering point (arrow) between visible low-melting fiber; And between polysaccharide fiber, there is no clinkering point (circle).
Fig. 3: the stress strain curve before the dressing blending heat treatment of modified cellulose fibre and PE/PP bicomponent fibre.Crosshead travel distance (millimeter) when abscissa is for stretching in figure; Vertical coordinate is for testing to obtain pulling force (N).The stress strain curve of 5 samples is shown in figure.
1: sample 1; 2: sample 2; 3: sample 3; 4: sample 4; 5: sample 5.
Fig. 4: the stress strain curve of dressing blending heat treatment after 2 minutes of modified cellulose fibre and PE/PP bicomponent fibre.Crosshead travel distance (millimeter) when abscissa is for stretching in figure; Vertical coordinate is for testing to obtain pulling force (N).The stress strain curve of 5 samples is shown in figure.
1: sample 1; 2: sample 2; 3: sample 3; 4: sample 4; 5: sample 5.
Detailed description of the invention
Intensity:
Dry or the wet strength of non-weaving cloth is that tool is directive, namely longitudinally (MD) and horizontal (CD).Longitudinally (MD) intensity refers to the intensity of the direction of motion along material in production process, and laterally (CD) is the intensity with the direction longitudinally becoming 90 degree.Generally, the longitudinal strength of the non-weaving cloth produced by nonwovens process is lower than transverse strength.Intensity described in disclosure embodiment, except indicating especially, is transverse direction (CD) intensity.
Wet strength method of testing:
In some embodiments of the disclosure, the hygroscopicity test of non-weaving cloth is with reference to international standard ISO13726-12002, and Part I " Part1Aspects of Absorbency " is tested.
Using solution A as test solution in above-mentioned standard.Solution A is the solution containing the sodium chloride of 8.298 grams and the calcium chloride dihydrate of 0.368 gram in often liter of solution.
The test of the wet strength of non-weaving cloth employs Fig. 1 shown device and adds wet process to sample, then tests as follows:
1) non-weaving cloth sample is cut into the rectangular sample of 2 centimetres wide, length is at least 7 centimetres;
2) doubling sample, is positioned over said apparatus and has been filled in the container 2 of the solution of test fluid 3, uses solution A as test fluid 3.Solution height in this container is 2+/-0.5cm;
3) make the folded part of sample be placed in the bottom of device, leave standstill 30 seconds;
4) specimen holder is gone out container, the top of the clamp of stretching tester put at its two ends and bottom;
5) two jaw distances of tester are 50mm, and set the speed of service of top jaw as 100mm/min;
6) record destroys the maximum of sample and exerts oneself (N).
If measure horizontal and vertical wet strength, then after producing first sample, becoming with first piece of sample on the direction of 90 degree to cut out lower second piece of sample, to ensure the sample obtaining longitudinal direction (MD) and horizontal (CD) direction simultaneously.Then test according to the method described above.
Average wet strength is the meansigma methods of MD and CD.
Embodiment 1. prepares the calcium alginate fibre dressing (TP504-3) containing 10%PE/PP bicomponent fibre
Raw material 1:G type calcium alginate fibre, fineness 3dtex, length 75 millimeters
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, length 45 millimeters
By 100 grams of PE/PP fibers, 900 grams of calcium alginate fibres are weighed in proportion, and mixing is rear uses opener shredding, feeding carding machine, lapping after combing, then becomes cloth (density 60/ square centimeter) through suitable acupuncture, and non-weaving cloth grammes per square metre is 130 grams/m.Again the non-weaving cloth made is put into the baking oven that temperature is 140 degrees Celsius, take out after certain hour.
Then measure transverse direction (CD) wet strength, its meansigma methods is listed in the table below 1.
Table 1. baking oven time and wet strength (wet strength value is the meansigma methods of 5 samples)
| The baking oven time (min) | Non-sterilizing wet strength (N/cm) |
| 0 | 2.1 |
| 2 | 3.4 |
| 3 | 4.1 |
Embodiment 2
The calcium alginate fibre dressing (TP504-4) of preparation containing 2%PE/PP bicomponent fibre
Raw material 1:G type calcium alginate fibre, fineness 3dtex, length 75 millimeters
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, length 45 millimeters
16 grams of PE/PP fibers, 784 grams of calcium alginate fibres are weighed in proportion and first mixed with hands, then opener shredding is fed together, feeding carding machine, after combing, lapping is again through suitable acupuncture (density 60/ square centimeter), and non-weaving cloth grammes per square metre is 120 grams/m.Again the non-weaving cloth made is put into the baking oven that temperature is 140 degrees Celsius, take out after certain hour.
Then measure transverse direction (CD) wet strength, its meansigma methods is listed in the table below 2.
Table 2. baking oven time and wet strength (wet strength value is the meansigma methods of 5 samples)
| The baking oven time (min) | Non-sterilizing wet strength (N/cm) |
| 0 | 1.8 |
| 2 | 2.5 |
| 3 | 2.6 |
Embodiment 3
The modified cellulose fibre dressing (TP504-2) of preparation containing 20%PE/PP bicomponent fibre
Raw material 1: modified cellulose fibre (carboxymethyl cellulose fiber), fineness 1.7dtex, length 50 millimeters
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, length 45 millimeters
800 grams of modified cellulose fibres and 200 grams of PE/PP fibers are weighed after mixing and use opener shredding, feeding carding machine, after combing, lapping is again through suitable acupuncture (density 100/ square centimeter), and non-weaving cloth grammes per square metre is 120 grams/m.Again the non-weaving cloth made is put into the baking oven that temperature is 140 degrees Celsius, take out after certain hour.
Can see under the microscope, at the generation clinkering point of heat treatment after 2 minutes between low-melting fiber.Between carboxymethyl cellulose fiber, then there is no clinkering point, see Fig. 2.
Then measure transverse direction (CD) wet strength, its meansigma methods is listed in the table below 3.Before the wet strength of heat treatment after 2 minutes is almost heat treatment three times of the wet strength of non-weaving cloth can be found out, after three minutes, be almost 4 times.
Table 3. baking oven time and wet strength (wet strength value is the meansigma methods of 5 samples)
| The baking oven time (min) | Non-sterilizing wet strength (N/cm) |
| 0 | 2.5 |
| 2 | 8.1 |
| 3 | 10.6 |
Low-melting fiber melts node also can be found out the contribution of wet strength from the change of stress strain curve.Non-sterilizing sample is not shown in Fig. 3 through heat treated typical wet strength stress strain curve.Non-sterilizing sample through 2 minutes heat treated typical wet strength stress strain curve see Fig. 4.
As seen from Figure 3, do not have heat treated wet strength stress strain curve intensity to extend jitter and rise, represent gelatinous fibre lost strength under hygrometric state, slide between fiber more obvious.But have mutually bonding after 2 minutes between low-melting fiber at heat treatment, three-dimensional cross-linked structure is formed after these low-melting fibers bond mutually, further enhancing the intensity of non-weaving cloth, when running into the liquid such as water at non-weaving cloth, gelatinous fibre loses intensity, but the connection of the three-dimensional of low-melting fiber affects by hygrometric state hardly, assume responsibility for external force, greatly reduce by the amplitude of sliding between external force fiber in hygrometric state situation, this makes the rising jitter phenomenon of stress strain curve (Fig. 4) greatly slow down.
Afterwards sample is respectively cut through 2 minutes and 3 minutes heat treated non-weaving cloths, again through Co 60 sterilizing after packaging, then hygrometric intensity and hygroscopicity (meansigma methods of 5 samples sees the following form 4).
Table 4. baking oven time and wet strength, hygroscopicity (Co 60 sterilizing, the meansigma methods of 5 samples)
Ethane via epoxyethane (EO) sterilizing again after above heat treated sample is packed again, then hygrometric intensity and hygroscopicity (meansigma methods of 5 samples sees the following form 5).
Table 5. baking oven time and wet strength, hygroscopicity (EO sterilizing, the meansigma methods of 5 samples)
Embodiment 4
The modified cellulose fibre dressing (TP497-1) of preparation containing 16%PE/PP bicomponent fibre.
Raw material 1: modified cellulose fibre (carboxymethyl cellulose fiber), fineness 1.7dtex, length 50 millimeters
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, length 45 millimeters
840 grams of modified cellulose fibres and 160 grams of PE/PP fibers are weighed after mixing and use opener shredding, feeding carding machine, after combing, lapping is again through suitable acupuncture (density 100/ square centimeter), and non-weaving cloth grammes per square metre is 125 grams/m.Again the non-weaving cloth made is put into the baking oven that temperature is 140 degrees Celsius, take out after certain hour.Then measure transverse direction (CD) wet strength, its meansigma methods is listed in the table below 6.Then by non-weaving cloth again through Co 60 sterilizing, then hygrometric intensity.
Table 6. baking oven time and wet strength, hygroscopicity (Co 60 sterilizing, the meansigma methods of 5 samples)
Embodiment 5
The modified cellulose fibre dressing (TP497-2) of preparation containing 30%PE/PP bicomponent fibre.
Raw material 1: modified cellulose fibre (carboxymethyl cellulose fiber), fineness 1.7dtex, length 50 millimeters
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, length 45 millimeters
350 grams of modified cellulose fibres and 150 grams of PE/PP fibers are weighed after mixing and use opener shredding, feeding carding machine, after combing, lapping is again through suitable acupuncture (density 100/ square centimeter), and non-weaving cloth grammes per square metre is 118 grams/m.Again the non-weaving cloth made is put into the baking oven that temperature is 140 degrees Celsius, take out after certain hour.Then measure transverse direction (CD) wet strength, its meansigma methods is listed in the table below 7.Then by non-weaving cloth again through Co 60 sterilizing, then hygrometric intensity.
Table 7. baking oven time and wet strength, hygroscopicity (Co 60 sterilizing, the meansigma methods of 5 samples)
Embodiment 6
The modified cellulose fibre dressing (TP497-3) of preparation containing 8%PE/PP bicomponent fibre.
Raw material 1: modified cellulose fibre (carboxymethyl cellulose fiber), fineness 1.7dtex, length 50 millimeters
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, length 45 millimeters
920 grams of modified cellulose fibres and 80 grams of PE/PP fibers are weighed after mixing and use opener shredding, feeding carding machine, after combing, lapping is again through suitable acupuncture (density 100/ square centimeter), and non-weaving cloth grammes per square metre is 130 grams/m.Again the non-weaving cloth made is put into the baking oven that temperature is 140 degrees Celsius, take out after certain hour.Then measure transverse direction (CD) wet strength, its meansigma methods is listed in the table below 8.Can find out that the wet strength of non-weaving cloth significantly improves after 2 minutes at heat treatment.Then by non-weaving cloth again through Co 60 sterilizing, then hygrometric intensity.
Table 8. baking oven time and wet strength, hygroscopicity (Co 60 sterilizing, the meansigma methods of 5 samples)
Embodiment 7
The modified cellulose fibre dressing (TP504-1) of preparation containing 10%PE/PP bicomponent fibre.
Raw material 1: modified cellulose fibre (carboxymethyl cellulose fiber), fineness 1.7dtex, length 50 millimeters
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, length 45 millimeters
900 grams of modified cellulose fibres and 100 grams of PE/PP fibers are weighed after mixing and use opener shredding, feeding carding machine, after combing, lapping is again through suitable acupuncture (density 100/ square centimeter), and non-weaving cloth grammes per square metre is 120 grams/m.Again the non-weaving cloth made is put into the baking oven that temperature is 140 degrees Celsius, take out after certain hour.Then measure transverse direction (CD) wet strength, its meansigma methods is listed in the table below 9.
Table 9. baking oven time and wet strength (wet strength value is the meansigma methods of 5 samples)
| The baking oven time (min) | Non-sterilizing wet strength (N/cm) |
| 0 | 2.1 |
| 1 | 2.4 |
| 2 | 5.4 |
| 3 | 5.9 |
Embodiment 8
The modified chitosan fiber dressing (TP504-5) of preparation containing 20%PE/PP bicomponent fibre.
Raw material 1: modified chitosan fiber (acylation modification chitin fiber), fineness 2.0dtex, length 50 millimeters
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, length 45 millimeters
400 grams of modified chitosan fiber fibers and 100 grams of PE/PP fibers are weighed after mixing and use opener shredding, feeding carding machine, after combing, lapping is again through suitable acupuncture (density 80/ square centimeter), and non-weaving cloth grammes per square metre is 100 grams/m.Again the non-weaving cloth made being put into temperature is take out after the baking oven of 140 degrees Celsius dries 1.5 minutes.
Cut by the non-weaving cloth of preparation, ethane via epoxyethane sterilizing again after packaging, then hygrometric intensity (transverse direction) is: 7.4N/cm.Recording dressing absorbability is again: 18.5 grams/100 square centimeters.
Embodiment 9
The chitin fiber dressing (TP504-6) of preparation containing 20%PE/PP bicomponent fibre.
Raw material 1: chitin fiber, fineness 2.2dtex, length 50 millimeters
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, length 45 millimeters
400 grams of chitin fibers and 100 grams of PE/PP fibers are weighed after mixing and use opener shredding, feeding carding machine, after combing, lapping is again through suitable acupuncture (density 80/ square centimeter), and non-weaving cloth grammes per square metre is 105 grams/m.Again the non-weaving cloth made being put into temperature is take out after the baking oven of 140 degrees Celsius dries 1.5 minutes.
Cut by the non-weaving cloth of preparation, again through Co 60 sterilizing after packaging, then hygrometric intensity (transverse direction) is: 8.1N/cm.Recording dressing absorbability is again: 8.5 grams/100 square centimeters.
Embodiment 10
The calcium alginate fibre dressing (TP504-7) of preparation containing 50%PA/PET bicomponent fibre.
Raw material 1: calcium alginate fibre, fineness 3dtex, length 75 millimeters
Raw material 2:PA/PET bicomponent fibre, fineness 2.0dtex, length 51 millimeters
250 grams of calcium alginate fibres and 250 grams of PA/PET fibers are weighed after mixing and use opener shredding, feeding carding machine, after combing, lapping is again through suitable acupuncture (density 80/ square centimeter), and non-weaving cloth grammes per square metre is 118 grams/m.Again the non-weaving cloth made being put into temperature is take out after the baking oven of 160 degrees Celsius dries 2 minutes.
Cut by the non-weaving cloth of preparation, again through Co 60 sterilizing after packaging, then hygrometric intensity (transverse direction) is: 15.2N/cm.Recording dressing absorbability is again: 9.4 grams/100 square centimeters.
Embodiment 11
Preparation contains the dressing (TP504-8) of 40%PP fiber and calcium alginate fibre.
Raw material 1: calcium alginate fibre, fineness 3dtex, length 75 millimeters
Raw material 2:PP fiber, fineness 2.2dtex, length 51 millimeters
300 grams of calcium alginate fibres and 200 grams of PP fibers are weighed after mixing and use opener shredding, feeding carding machine, after combing, lapping is again through suitable acupuncture (density 80/ square centimeter), and non-weaving cloth grammes per square metre is 120 grams/m.Again the non-weaving cloth made being put into temperature is take out after the baking oven of 160 degrees Celsius dries 1.5 minutes.
Cut by the non-weaving cloth of preparation, again through Co 60 sterilizing after packaging, then hygrometric intensity (transverse direction) is: 15N/cm.Recording dressing absorbability is again: 11.4 grams/100 square centimeters.
Embodiment 12
Preparation is containing 5%PE/PP bicomponent fibre silver-containing alginic acid calcium fiber dressing (TP504-9).
Raw material 1: silver-containing alginic acid calcium fiber (silver content 1.9% weight), fineness 3dtex, length 75 millimeters
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, length 45 millimeters
475 grams of calcium alginate fibres and 25 grams of PE/PP fibers are weighed after mixing and use opener shredding, feeding carding machine, after combing, lapping is again through suitable acupuncture (density 80/ square centimeter), and non-weaving cloth grammes per square metre is 180 grams/m.Again the non-weaving cloth made being put into temperature is take out after the baking oven of 140 degrees Celsius dries 2 minutes.
Cut by the non-weaving cloth of preparation, again through Co 60 sterilizing after packaging, then hygrometric intensity (transverse direction) is: 7.5N/cm.Recording dressing absorbability is again: 23.6 grams/100 square centimeters, and dressing silver content is 1.8% weight.
Embodiment 13
Preparation contains argentiferous modified cellulose fibre and the dressing (TP504-10) of 5%PE/PP bicomponent fibre.
Raw material 1: argentiferous modified cellulose fibre (the carboxymethyl modified cellulose fibre of argentiferous) (silver content 0.6% weight), fineness 2.3dtex, length 50 millimeters
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, length 45 millimeters
475 grams of argentiferous modified cellulose fibres and 25 grams of PE/PP fibers are weighed after mixing and use opener shredding, feeding carding machine, after combing, lapping is again through suitable acupuncture (density 80/ square centimeter), and non-weaving cloth grammes per square metre is 80 grams/m.Again the non-weaving cloth made being put into temperature is take out after the baking oven of 140 degrees Celsius dries 2 minutes.
Cut by the non-weaving cloth of preparation, again through Co 60 sterilizing after packaging, then hygrometric intensity (laterally with longitudinal meansigma methods) is: 1.2N/cm.Recording dressing absorbability is again: 17.8 grams/100 square centimeters, and dressing silver content is 0.55% weight.
Embodiment 14
The carboxymethyl cellulose fiber dressing of preparation containing 27%PE/PP bicomponent fibre
Raw material 1: carboxymethyl cellulose fiber, fineness 1.7dtex, length 50 millimeters
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, length 45 millimeters
1000 grams of carboxymethyl cellulose fibers are used separately opener shredding, and feeding carding machine, after combing, lapping is again through suitable acupuncture (density 60/ square centimeter), and non-weaving cloth grammes per square metre is 80 grams/m.And then PE/PP bicomponent fibre fiber is also used separately opener shredding, feeding carding machine, after combing, lapping is again through suitable acupuncture (density 60/ square centimeter), and grammes per square metre is 60 grams/m.
Again prepared carboxymethyl cellulose fiber non-weaving cloth stratum reticulare is divided into two parts, alternately superpose with the PE/PP bicomponent fiber nonwoven cloth stratum reticulare prepared before, bicomponent fiber nonwoven cloth stratum reticulare outside, is clipped in the middle by carboxymethyl cellulose fiber non-weaving cloth stratum reticulare.And then acupuncture, needling density 40/ square centimeter).
Again the non-weaving cloth of the three layers of compound made being put into temperature is that the oven of 140 degrees Celsius was taken out after 2 minutes.Then to measure transverse direction (CD) wet strength be 12.5N/cm hygroscopicity is 32 grams/100cm
2.
Non-weaving cloth/dressing of the present disclosure comprises polysaccharide fiber and low-melting fiber, in its preparation section, comprise heat treatment step.Heat treatment makes low-melting fiber generation melting, produces clinkering point between adjacent fiber, adds the intensity of non-weaving cloth.These clinkering points are formed between non-gelatinous fibre.Non-weaving cloth/the dressing prepared thus, intensity does not reduce because of plastic after absorption of liquid.Therefore, also can not bring the significantly reduction of intensity after moisture absorption, the full wafer being easy to dressing is removed.Be conducive to being applied to exedens wound, as cave type wound.
Claims (1)
1. a manufacture method for wound dressing, described wound dressing is made up of the blend comprising low-melting fiber and polysaccharide fiber, it is characterized in that,
The carboxymethyl cellulose fiber dressing of preparation containing 27% polyethylene/polypropylene bicomponent fibre,
Raw material 1: carboxymethyl cellulose fiber, fineness 1.7dtex, length 50 millimeters;
Raw material 2: polyethylene/polypropylene bicomponent fibre ES-C, fineness 2.5dtex, length 45 millimeters;
1000 grams of carboxymethyl cellulose fibers are used separately opener shredding, feeding carding machine, after combing, lapping is again through suitable acupuncture, density 60 stings/square centimeter, obtain carboxymethyl cellulose fiber non-weaving cloth stratum reticulare, non-weaving cloth grammes per square metre is 80 grams/m, and then polyethylene/polypropylene bicomponent fibre is also used separately opener shredding, feeding carding machine, after combing, lapping is again through suitable acupuncture, density 60 stings/square centimeter, and obtain polyethylene/polypropylene bicomponent fiber nonwoven cloth stratum reticulare, grammes per square metre is 60 grams/m;
Again prepared carboxymethyl cellulose fiber non-weaving cloth stratum reticulare is divided into two parts, alternately superpose with the polyethylene/polypropylene bicomponent fiber nonwoven cloth stratum reticulare prepared before, carboxymethyl cellulose fiber non-weaving cloth stratum reticulare outside, bicomponent fiber nonwoven cloth stratum reticulare is clipped in the middle, and then acupuncture, needling density 40 stings/square centimeter;
Again the non-weaving cloth of the three layers of compound made being put into temperature is that the oven of 140 degrees Celsius was taken out after 2 minutes.
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| CN112679628B (en) * | 2020-12-24 | 2021-10-26 | 张家口健垣精准医学有限公司 | Medical dressing based on alginate fibers and preparation method thereof |
| CN113599564B (en) * | 2021-07-28 | 2023-03-17 | 江苏国望高科纤维有限公司 | Novel non-woven fabric wound dressing and preparation method and application thereof |
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