CN103463670A - 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, relates in particular to wound dressing and manufacture method thereof.
Background technology
Wound dressing, the especially fiber wound dressing of current high moisture absorption on the market, mainly be comprised of polysaccharide fiber, as calcium alginate wound dressing, Chitosan in Wound Dressing, modified cellulose wound dressing etc.The characteristics of these dressing are to have higher hygroscopicity and moisture retention.Can form gel after absorbing wound exudate, thereby provide a moistening environment for wound healing.
The characteristics of high moisture absorption dressing are its hygroscopicity and moisture retention.Its high-hygroscopicity is mainly to become 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, and increases nursing staff's working strength.Those cave type wounds particularly, the wet strength of dressing just more seems important.
U.S. Patent application US2009/0287130A1 specialized designs a kind of dressing of nursing cave type wound.This dressing is elongated bar, by gelatinous fibre (such as modified cellulose fibre), through nonwovens process, is prepared.This dressing has the positive and negative repeated localised puncture braiding of another non-gelatinous fibre yarn in dressing along its length and laterally, for strengthening the intensity of dressing.The advantage of this method is the intensity that has obviously improved dressing, particularly wet strength.Yet this puncture braiding must be again through knitting process after non-woven operation, operation is long and cost is high.
More satisfactory method is the direct non-gelatinous fibre of blending in non-woven operation, to improve dressing strength.For example, 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) and common non-gelatinous fibre (as cellulose fibre) blending obtain.Although the starting point of these two applications is to reduce costs, owing to having used non-gelatinous fibre, objectively also played the effect that improves wet strength.U.S. Patent application US7385101 is similar, and just its non-gelatinous fibre is to have plated silver-colored nylon fiber.This dressing contains antibacterial silver, can be used for the processing of infected wound.
Fiber in these dressing is to be present in independently of one another in dressing, does not form and interacts further to increase the intensity of dressing each other.
Summary of the invention
Embodiments more of the present disclosure provide a kind of non-weaving cloth, and it is made by the blending thing that comprises 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 all is close to each other, and these contacts site are just the bonding chance that provides after fibers melt.Once there be not (such as shifting out from baking oven) in hot conditions, puddle solidifies again, forms interfibrous clinkering point between the fiber contacted with each other.Numerous such clinkering point provides a firm space three-dimensional structure to non-weaving cloth, has increased the intensity of non-weaving cloth.When running into liquid, the gelatinous fibre plastic, but the clinkering point of low-melting fiber (between non-gelatinous fibre) still exists, and kept the wet strength of non-weaving cloth.
In some embodiments, the fusing point of low-melting fiber is between 90-180 ℃.It will be appreciated by those skilled in the art that fusing point is that material is liquid temperature by solid state transformation.Strictly, fusing point is not a point value, but a temperature range is called melting range.Two limits of melting range are called initial melting temperature and whole melting temperatur, and initial melting temperature is that material starts the temperature melted, and whole melting temperatur is the temperature that material melts fully.Every kind of compound has a fixing fusing point, under certain pressure from just being fused to the temperature range of fine melt.Therefore, in disclosure context, although fusing point with a concrete some value representation, it has contained the melting range interval.
In some embodiments, low-melting fiber, through high-temperature process, starts to occur melting when reaching fusing point, and after temperature reduces, the part of melting is solidified again, thereby forms each other clinkering point 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 the PE/PP bicomponent fibre can be realized partial melting 140 degrees centigrade of left and right.Some PA/PET bicomponent fibre just can be realized partial melting 125 degrees centigrade of left and right.The fusing point of some fiber is also lower, as the PP fiber, only has 160 degrees centigrade of left and right.The fusing point of some PA fibers can be accomplished 85 degrees centigrade.
The ratio of this low-melting fiber in non-weaving cloth will suitably be controlled.In some embodiments, the ratio of low-melting fiber in non-weaving cloth is by weight between 2-85%.In some embodiments, between 2-55%.In some embodiments, between 2-45%.The inventor finds, the too low strength increase of ratio DeGrain, and moisture absorbability and moisture retentivity is affected too much.Have little effect lower than 2% strength 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, to use calcium alginate fibre or calcium alginate to receive fiber.Calcium alginate content in calcium alginate fibre is 90% or above (by weight), and sodium alginate content is below 10%.The calcium alginate content that calcium alginate is received in fiber is in (by weight) below 90%, and sodium alginate content is more than 10%.
In some embodiments, if need to there is certain biocidal property or anthemorrhagic performance, 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 its unique chemical constitution, 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, carboxyethyl cellulose fiber or water-fast cellulose alkyl sulfonic acid modified cellulose fibre.These fibers can absorb large quantity of fluid.Test shows that this class material can be 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, also two or more polysaccharide fiber can be used in non-weaving cloth as required, as chitosan and calcium alginate fibre; Or chitosan and modified cellulose fibre.
Because the clinkering point between low-melting fiber has strengthened the intensity of non-weaving cloth, therefore any polysaccharide fiber all can have benefited from this.The 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, a kind of in polysaccharide fiber or low-melting fiber or both can be contained 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.It is well known in the art adding silver-colored method in polysaccharide fiber, for example in the polysaccharide fiber spinning solution, add antibacterial, as silver nitrate, silver chloride, Disilver carbonate, phosphoric acid hydrogen zirconium sodium silver (Silver Sodium Zirconium Hydrogen phosphate), just contain antibacterial in the fiber after making like this.In contg. silver fiber prepared by this mode, silver content is by weight at 0.001%-10%.At fiber surface spraying argentiferous liquid, as at fiber surface, sprayed nanometer silver solution, 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, makes silver be attached on fiber surface or form chemical bond with fiber, the silver content of this mode is between 0.001%-2.5%.
Many silver-containing materials are at high temperature stable.Therefore, also can, by antibacterial in the preparation process of low-melting fiber, as silver chloride, Disilver carbonate, phosphoric acid hydrogen zirconium sodium silver, be added in fiber.
All fibres can be used some oil preparationes or surfactant, and this is mainly convenient for subsequent production, and the non-weaving cloth function is had no significant effect.
The inventor finds unexpectedly, when non-weaving cloth of the present disclosure, through after further processing, can obtain a kind of wound dressing, and 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, packing and sterilizing make.Those skilled in the art can make wound dressing any size, any form.
Embodiments more of the present disclosure provide a kind of wound dressing, and it is made by the blending thing that comprises low-melting fiber and polysaccharide fiber.A fusing point during atmospheric pressure of low-melting fiber is between 90-180 ℃.
In the wound dressing of some embodiments of the disclosure, between whole or local low-melting fiber, form clinkering point.
In some embodiments, in wound dressing, the fibre length of polysaccharide fiber and low-melting fiber is the 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 also contains the antibacterial that accounts 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 also contains the antibacterial that accounts 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 alternately superposeed and makes by the stratum reticulare that comprises polysaccharide fiber and the stratum reticulare that comprises low-melting fiber, between stratum reticulare, forms and interweaves, and between whole or local low-melting fiber, forms clinkering point.
Some embodiments of the disclosure provide a kind of manufacture method of the non-weaving cloth that contains polysaccharide fiber and low-melting fiber, and it comprises step:
Two kinds of fibers are mixed in proportion;
Shredding;
Combing;
Become net; With
Become cloth,
It is characterized in that, when becoming cloth or comprise afterwards heat treated step.
In some embodiments, after fiber becomes net, can be directly through being heat-treated to cloth.But in situation, after needling process makes it into cloth, then heat treatment forms clinkering point between fiber mostly.
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 the 3-105 millimeter.Some technique is used than 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 of the non-weaving cloth that contains polysaccharide fiber and low-melting fiber, and it comprises step:
1) by low-melting fiber and polysaccharide fiber shredding respectively;
2) combing respectively;
3) become respectively net;
Alternately stack of the stratum reticulare that 4) will comprise the stratum reticulare of low-melting fiber and comprise polysaccharide fiber;
5) form and interweave between stratum reticulare; With
6) become cloth,
It is characterized in that, when becoming cloth or comprise afterwards heat treated step.
In some embodiments, non-weaving cloth is processed into to single layer structure, be about to that polysaccharide fiber is mixed in proportion with low-melting 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, so there is clinkering point after heat treatment between all or part of fiber, strengthened the intensity of non-weaving cloth.
In other embodiments, non-weaving cloth is processed into to multiple structure, the independent shredding of polysaccharide fiber and low-melting fiber, combing with become net, so the stack of latter two stratum reticulare 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, make two-layer part fiber be punctured to respectively opposite one deck and form and interweave after two kinds of materials into the net (stratum reticulare) stacks, then, through heat treatment, form clinkering point.
This multiple structure can be also three layers even more multi-layered.For example, 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 part fiber of three layers be punctured to respectively other two-layer formation and interweave, and then, through heat treatment, form clinkering point.
Another form of three-decker is that in the middle of polysaccharide fiber is placed on, two outside layers is low-melting fiber.Three-layer network is stacked add after again through acupuncture, make the part fiber of three layers be punctured to respectively other two-layer formation and interweave, and then, through heat treatment, form clinkering point.
The purposes of non-weaving cloth is very extensive, such as for medical cloth: operating coat, protective garment, mask, diaper etc.; Be used for industrial cloth: filtering material, insulant, cement package bags, geotextiles, coating cloth etc.; Be used for agricultural fabric: crop protection cloth, seedling cloth, insulation curtain etc.; Be used 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, after becoming cloth, can also comprise: cut, arbitrary step or a plurality of step in packing or sterilizing.
Some embodiments of the disclosure provide a kind of manufacture method of wound dressing, and it comprises step:
1) low-melting fiber and polysaccharide fiber are evenly mixed;
2) shredding;
3) combing;
4) become net;
5) become cloth;
6) cut;
7) packing; With
8) sterilizing,
In some embodiments, when becoming cloth or comprise afterwards heat treated 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 shredding respectively;
2) combing respectively;
3) become respectively net;
Alternately stack of the stratum reticulare that 4) will comprise the stratum reticulare of low-melting fiber and comprise polysaccharide fiber;
5) form and interweave between stratum reticulare;
6) become cloth;
7) cut;
8) packing; With
9) sterilizing,
In some embodiments, when becoming cloth or comprise afterwards heat treated step.
To the heat treated mode of material, can be that material is placed in the controlled device (as baking oven) of temperature, maintain certain hour, can be also to allow material fast by a baking oven that temperature speed is controlled, make material just make to form and melt node between low-melting fiber in the time of baking oven.
Heat treated another mode is by material hot pressing, and the pressing plate of certain surface temperature or the pressure roller of rotation are arranged, and keeps certain pressure, maintains certain temperature and time, makes the low-melting fiber formation in material melt node.This pressing plate or roller surface can be figuratum in addition, so protruding part are being arranged, material because of pressurized, being heated forms and melts node at these positions.Therefore form the dressing with the hot pressing pattern.
Another heat treatment mode is ultrasound wave.Utilize hyperacoustic high frequency to make the low-melting fiber partial melting, can realize improving equally the purpose of wet strength.In addition, the ultrasound wave mode also can form pattern.This pattern can be rhombus, circle, triangle, spot distribution and other special patterns.
In some embodiments, heat treatment comprises step: i) non-weaving cloth is placed in to the melting temperature of low-melting fiber, keeps certain hour, preferably 1-3 minute; Ii) be cooled to ambient temperature;
In other embodiments, heat treatment comprises step: i) non-weaving cloth is placed between a pair of pressure roller to the certain hour that pressurizes, and preferred 1-3 minute, the roller surface temperature reaches the fusing point of low-melting fiber; Ii) be cooled to ambient temperature.
In some embodiments, sterilization method can be the 60Coradiation sterilizing, can be also ethylene oxide sterilizing, and the technical staff can determine sterilization method as required voluntarily.
The accompanying drawing explanation
Fig. 1: the device of test disclosure non-weaving cloth or dressing wet strength.
1: specimen; 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 there is no clinkering point (circle) between polysaccharide fiber.
Fig. 3: the stress strain curve before the dressing blending heat treatment of modified cellulose fibre and PE/PP bicomponent fibre.Chuck shift length (millimeter) when in figure, abscissa is for stretching; Vertical coordinate is for testing to obtain pulling force (N).The stress strain curve that has shown 5 samples 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.Chuck shift length (millimeter) when in figure, abscissa is for stretching; Vertical coordinate is for testing to obtain pulling force (N).The stress strain curve that has shown 5 samples in figure.
1: sample 1; 2: sample 2; 3: sample 3; 4: sample 4; 5: sample 5.
The specific embodiment
Intensity:
Dry or the wet strength of non-weaving cloth has directivity, i.e. vertically (MD) and laterally (CD).Vertically (MD) intensity refers to along the intensity of the direction of motion of material in production process, and laterally (CD) is and vertical intensity that becomes the directions of 90 degree.The longitudinal strength of the non-weaving cloth of generally, producing by nonwovens process is lower than transverse strength.Intensity described in disclosure embodiment, except indicating especially, be laterally (CD) intensity.
The wet strength method of testing:
In some embodiments of the disclosure, the test of the hygroscopicity of non-weaving cloth is with reference to international standard ISO13726-12002, and first " Part1Aspects of Absorbency " tests.
Using A solution as test solution in above-mentioned standard.The solution of the calcium chloride dihydrate that A solution is the sodium chloride that contains 8.298 grams in every liter of solution and 0.368 gram.
The test of the wet strength of non-weaving cloth has been used Fig. 1 shown device to be added wet process to sample, then test as follows:
1) the non-weaving cloth sample is cut into to the rectangular sample of 2 centimetres wide, length is at least 7 centimetres;
2) doubling sample, be positioned over it in container 2 of solution that said apparatus filled test fluid 3, uses A solution as test fluid 3.Solution height in this container be 2+/-0.5cm;
3) make the folded part of sample be placed in the bottom of device, standing 30 seconds;
4) specimen holder is gone out to container, the top of the clamp of stretching tester that its two ends are put into and bottom;
5) two jaws distances of tester are 50mm, and the speed of service of establishing the top jaw is 100mm/min;
6) maximum that record destroys sample is (N) firmly.
If measure horizontal and vertical wet strength,, after producing first sample, on the direction that becomes 90 degree with first sample, cut out lower second sample, to guarantee obtaining vertically (MD) and the laterally sample of (CD) direction simultaneously.Then test according to the method described above.
The meansigma methods that average wet strength is MD and CD.
The calcium alginate fibre dressing (TP504-3) that embodiment 1. preparations contain the 10%PE/PP bicomponent fibre
Raw material 1:G type calcium alginate fibre, fineness 3dtex, 75 millimeters of length
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, 45 millimeters of length
100 gram PE/PP fibers, 900 gram calcium alginate fibres are weighed in proportion and mixed the rear opener shredding of using, the feeding carding machine, lapping after combing, then become cloth (60/ square centimeter of density) through suitable acupuncture, the non-weaving cloth grammes per square metre is 130 g/ms.Again the non-weaving cloth of making is put into to the baking oven that temperature is 140 degrees centigrade, take out after certain hour.
Then measure laterally (CD) wet strength, its meansigma methods is listed in the table below 1.
Table 1. baking oven time and wet strength (the wet strength value is the meansigma methods of 5 samples)
| The baking oven time (min) | Not sterilizing wet strength (N/cm) |
| 0 | 2.1 |
| 2 | 3.4 |
| 3 | 4.1 |
The calcium alginate fibre dressing (TP504-4) that preparation contains the 2%PE/PP bicomponent fibre
Raw material 1:G type calcium alginate fibre, fineness 3dtex, 75 millimeters of length
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, 45 millimeters of length
16 gram PE/PP fibers, 784 gram calcium alginate fibres are weighed and first mixed with hands in proportion, then feed together the opener shredding, the feeding carding machine, after combing, through suitably acupuncture (60/ square centimeter of density), the non-weaving cloth grammes per square metre is 120 g/ms again in lapping.Again the non-weaving cloth of making is put into to the baking oven that temperature is 140 degrees centigrade, take out after certain hour.
Then measure laterally (CD) wet strength, its meansigma methods is listed in the table below 2.
Table 2. baking oven time and wet strength (the wet strength value is the meansigma methods of 5 samples)
| The baking oven time (min) | Not sterilizing wet strength (N/cm) |
| 0 | 1.8 |
| 2 | 2.5 |
| 3 | 2.6 |
Embodiment 3
The modified cellulose fibre dressing (TP504-2) that preparation contains the 20%PE/PP bicomponent fibre
Raw material 1: modified cellulose fibre (carboxymethyl cellulose fiber), fineness 1.7dtex, 50 millimeters of length
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, 45 millimeters of length
800 gram modified cellulose fibres and 200 gram PE/PP fibers are weighed and mixed the rear opener shredding of using, the feeding carding machine, after combing, through suitably acupuncture (100/ square centimeter of density), the non-weaving cloth grammes per square metre is 120 g/ms again in lapping.Again the non-weaving cloth of making is put into to the baking oven that temperature is 140 degrees centigrade, take out after certain hour.
Can see under the microscope, at heat treatment generation clinkering point between low-melting fiber after 2 minutes.There is no clinkering point between carboxymethyl cellulose fiber, see Fig. 2.
Then measure laterally (CD) wet strength, its meansigma methods is listed in the table below 3.Before can finding out the wet strength of non-weaving cloth the wet strength after 2 minutes almost being heat treatment at heat treatment three times were almost 4 times after three minutes.
Table 3. baking oven time and wet strength (the wet strength value is the meansigma methods of 5 samples)
| The baking oven time (min) | Not 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 variation of stress strain curve.The sterilizing sample is not shown in Fig. 3 through heat treated typical wet strength stress strain curve.The sterilizing sample is not shown in Fig. 4 through 2 minutes heat treated typical wet strength stress strain curves.
As seen from Figure 3, do not have heat treated wet strength stress strain curve intensity elongation jitter to rise, mean gelatinous fibre lost strength under hygrometric state, slide between fiber more obvious.But after 2 minutes, between low-melting fiber, have mutually bonding at heat treatment, these low-melting fibers three-dimensional cross-linked structure of rear formation that mutually bonds, further strengthened the intensity of non-weaving cloth, while running into the liquid such as water at non-weaving cloth, gelatinous fibre has been lost intensity, but the connection of the three-dimensional of low-melting fiber is affected by hygrometric state hardly, has born external force, greatly reduced and be subject to the amplitude of sliding between the external force fiber in the hygrometric state situation, this makes the rising jitter phenomenon of stress strain curve (Fig. 4) greatly slow down.
By sample, each is cut through 2 minutes and 3 minutes heat treated non-weaving cloths afterwards, after packing again through the Co 60 sterilizing, 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)
The modified cellulose fibre dressing (TP497-1) that preparation contains the 16%PE/PP bicomponent fibre.
Raw material 1: modified cellulose fibre (carboxymethyl cellulose fiber), fineness 1.7dtex, 50 millimeters of length
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, 45 millimeters of length
840 gram modified cellulose fibres and 160 gram PE/PP fibers are weighed and mixed the rear opener shredding of using, the feeding carding machine, after combing, through suitably acupuncture (100/ square centimeter of density), the non-weaving cloth grammes per square metre is 125 g/ms again in lapping.Again the non-weaving cloth of making is put into to the baking oven that temperature is 140 degrees centigrade, take out after certain hour.Then measure laterally (CD) wet strength, its meansigma methods is listed in the table below 6.Then by non-weaving cloth again through the Co 60 sterilizing, then hygrometric intensity.
Table 6. baking oven time and wet strength, hygroscopicity (Co 60 sterilizing, the meansigma methods of 5 samples)
The modified cellulose fibre dressing (TP497-2) that preparation contains the 30%PE/PP bicomponent fibre.
Raw material 1: modified cellulose fibre (carboxymethyl cellulose fiber), fineness 1.7dtex, 50 millimeters of length
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, 45 millimeters of length
350 gram modified cellulose fibres and 150 gram PE/PP fibers are weighed and mixed the rear opener shredding of using, the feeding carding machine, after combing, through suitably acupuncture (100/ square centimeter of density), the non-weaving cloth grammes per square metre is 118 g/ms again in lapping.Again the non-weaving cloth of making is put into to the baking oven that temperature is 140 degrees centigrade, take out after certain hour.Then measure laterally (CD) wet strength, its meansigma methods is listed in the table below 7.Then by non-weaving cloth again through the Co 60 sterilizing, then hygrometric intensity.
Table 7. baking oven time and wet strength, hygroscopicity (Co 60 sterilizing, the meansigma methods of 5 samples)
The modified cellulose fibre dressing (TP497-3) that preparation contains the 8%PE/PP bicomponent fibre.
Raw material 1: modified cellulose fibre (carboxymethyl cellulose fiber), fineness 1.7dtex, 50 millimeters of length
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, 45 millimeters of length
920 gram modified cellulose fibres and 80 gram PE/PP fibers are weighed and mixed the rear opener shredding of using, the feeding carding machine, after combing, through suitably acupuncture (100/ square centimeter of density), the non-weaving cloth grammes per square metre is 130 g/ms again in lapping.Again the non-weaving cloth of making is put into to the baking oven that temperature is 140 degrees centigrade, take out after certain hour.Then measure laterally (CD) wet strength, its meansigma methods is listed in the table below 8.The wet strength that can find out non-weaving cloth significantly improves after 2 minutes at heat treatment.Then by non-weaving cloth again through the 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) that preparation contains the 10%PE/PP bicomponent fibre.
Raw material 1: modified cellulose fibre (carboxymethyl cellulose fiber), fineness 1.7dtex, 50 millimeters of length
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, 45 millimeters of length
900 gram modified cellulose fibres and 100 gram PE/PP fibers are weighed and mixed the rear opener shredding of using, the feeding carding machine, after combing, through suitably acupuncture (100/ square centimeter of density), the non-weaving cloth grammes per square metre is 120 g/ms again in lapping.Again the non-weaving cloth of making is put into to the baking oven that temperature is 140 degrees centigrade, take out after certain hour.Then measure laterally (CD) wet strength, its meansigma methods is listed in the table below 9.
Table 9. baking oven time and wet strength (the wet strength value is the meansigma methods of 5 samples)
| The baking oven time (min) | Not sterilizing wet strength (N/cm) |
| 0 | 2.1 |
| 1 | 2.4 |
| 2 | 5.4 |
| 3 | 5.9 |
The modified chitosan fiber dressing (TP504-5) that preparation contains the 20%PE/PP bicomponent fibre.
Raw material 1: modified chitosan fiber (acylation modification chitin fiber), fineness 2.0dtex, 50 millimeters of length
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, 45 millimeters of length
400 gram modified chitosan fiber fibers and 100 gram PE/PP fibers are weighed and mixed the rear opener shredding of using, the feeding carding machine, after combing, through suitably acupuncture (80/ square centimeter of density), the non-weaving cloth grammes per square metre is 100 g/ms again in lapping.Again the non-weaving cloth of making being put into to the baking oven baking that temperature is 140 degrees centigrade took out after 1.5 minutes.
The non-weaving cloth of preparation is cut, ethane via epoxyethane sterilizing again after packing, then hygrometric intensity (laterally) is: 7.4N/cm.Recording the dressing absorbability is again: 18.5 grams/100 square centimeter.
Embodiment 9
The chitin fiber dressing (TP504-6) that preparation contains the 20%PE/PP bicomponent fibre.
Raw material 1: chitin fiber, fineness 2.2dtex, 50 millimeters of length
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, 45 millimeters of length
400 gram chitin fibers and 100 gram PE/PP fibers are weighed and mixed the rear opener shredding of using, the feeding carding machine, after combing, through suitably acupuncture (80/ square centimeter of density), the non-weaving cloth grammes per square metre is 105 g/ms again in lapping.Again the non-weaving cloth of making being put into to the baking oven baking that temperature is 140 degrees centigrade took out after 1.5 minutes.
The non-weaving cloth of preparation is cut, and after packing, again through the Co 60 sterilizing, then hygrometric intensity (laterally) is: 8.1N/cm.Recording the dressing absorbability is again: 8.5 grams/100 square centimeter.
The calcium alginate fibre dressing (TP504-7) that preparation contains the 50%PA/PET bicomponent fibre.
Raw material 1: calcium alginate fibre, fineness 3dtex, 75 millimeters of length
Raw material 2:PA/PET bicomponent fibre, fineness 2.0dtex, 51 millimeters of length
250 gram calcium alginate fibres and 250 gram PA/PET fibers are weighed and mixed the rear opener shredding of using, the feeding carding machine, after combing, through suitably acupuncture (80/ square centimeter of density), the non-weaving cloth grammes per square metre is 118 g/ms again in lapping.Again the non-weaving cloth of making being put into to the baking oven baking that temperature is 160 degrees centigrade took out after 2 minutes.
The non-weaving cloth of preparation is cut, and after packing, again through the Co 60 sterilizing, then hygrometric intensity (laterally) is: 15.2N/cm.Recording the dressing absorbability is again: 9.4 grams/100 square centimeter.
Embodiment 11
The dressing (TP504-8) that preparation contains 40%PP fiber and calcium alginate fibre.
Raw material 1: calcium alginate fibre, fineness 3dtex, 75 millimeters of length
Raw material 2:PP fiber, fineness 2.2dtex, 51 millimeters of length
300 gram calcium alginate fibres and 200 gram PP fibers are weighed and mixed the rear opener shredding of using, the feeding carding machine, after combing, through suitably acupuncture (80/ square centimeter of density), the non-weaving cloth grammes per square metre is 120 g/ms again in lapping.Again the non-weaving cloth of making being put into to the baking oven baking that temperature is 160 degrees centigrade took out after 1.5 minutes.
The non-weaving cloth of preparation is cut, and after packing, again through the Co 60 sterilizing, then hygrometric intensity (laterally) is: 15N/cm.Recording the dressing absorbability is again: 11.4 grams/100 square centimeter.
Preparation contains 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, 75 millimeters of length
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, 45 millimeters of length
475 gram calcium alginate fibres and 25 gram PE/PP fibers are weighed and mixed the rear opener shredding of using, the feeding carding machine, after combing, through suitably acupuncture (80/ square centimeter of density), the non-weaving cloth grammes per square metre is 180 g/ms again in lapping.Again the non-weaving cloth of making being put into to the baking oven baking that temperature is 140 degrees centigrade took out after 2 minutes.
The non-weaving cloth of preparation is cut, and after packing, again through the Co 60 sterilizing, then hygrometric intensity (laterally) is: 7.5N/cm.Recording the dressing absorbability is again: 23.6 grams/100 square centimeter, the dressing silver content is 1.8% weight.
Embodiment 13
Argentiferous modified cellulose fibre and dressing (TP504-10) that preparation contains the 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, 50 millimeters of length
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, 45 millimeters of length
475 gram argentiferous modified cellulose fibres and 25 gram PE/PP fibers are weighed and mixed the rear opener shredding of using, the feeding carding machine, after combing, through suitably acupuncture (80/ square centimeter of density), the non-weaving cloth grammes per square metre is 80 g/ms again in lapping.Again the non-weaving cloth of making being put into to the baking oven baking that temperature is 140 degrees centigrade took out after 2 minutes.
The non-weaving cloth of preparation is cut, and after packing, again through the Co 60 sterilizing, then hygrometric intensity (laterally with meansigma methods) longitudinally is: 1.2N/cm.Recording the dressing absorbability is again: 17.8 grams/100 square centimeter, the dressing silver content is 0.55% weight.
The carboxymethyl cellulose fiber dressing that preparation contains the 27%PE/PP bicomponent fibre
Raw material 1: carboxymethyl cellulose fiber, fineness 1.7dtex, 50 millimeters of length
Raw material 2:PE/PP bicomponent fibre ES-C, fineness 2.5dtex, 45 millimeters of length
1000 gram carboxymethyl cellulose fibers are used separately to the opener shredding, the feeding carding machine, after combing, through suitably acupuncture (60/ square centimeter of density), the non-weaving cloth grammes per square metre is 80 g/ms again in lapping.And then PE/PP bicomponent fibre fiber is also used separately to the opener shredding, and the feeding carding machine, after combing, through suitably acupuncture (60/ square centimeter of density), grammes per square metre is 60 g/ms again in lapping.
Again prepared carboxymethyl cellulose fiber non-weaving cloth stratum reticulare is divided into to two parts, alternately stack of PE/PP bicomponent fibre non-weaving cloth stratum reticulare with preparation before, carboxymethyl cellulose fiber non-weaving cloth stratum reticulare outside, is clipped in the middle bicomponent fibre non-weaving cloth stratum reticulare.And then acupuncture, 40/ square centimeter of needling density).
Again three layers of compound non-weaving cloth making being put into to the oven that temperature is 140 degrees centigrade took out after 2 minutes.Then measuring laterally (CD) wet strength is that the 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, comprises heat treatment step.Heat treatment makes low-melting fiber generation melting, produces clinkering point between adjacent fiber, has increased the intensity of non-weaving cloth.These clinkering points form between non-gelatinous fibre.Non-weaving cloth/the dressing of preparation thus, after absorbing liquid, intensity does not reduce because of plastic.Therefore, also can not bring the decrease of intensity after moisture absorption, the full wafer that is easy to dressing is removed.Be conducive to be applied to the ulcer wound, as cave type wound.
Claims (13)
1. a wound dressing, it is made by the blending thing that comprises low-melting fiber and polysaccharide fiber, and the fusing point while it is characterized in that an atmospheric pressure of described low-melting fiber is between 90-180 ℃.
2. wound dressing according to claim 1, is characterized in that
Form clinkering point between whole or local low-melting fiber in wound dressing.
3. wound dressing according to claim 1, is characterized in that
The fibre length of described polysaccharide fiber and low-melting fiber is the 3-105 millimeter; And/or
The fineness of described polysaccharide fiber and low-melting fiber is 1-10dtex.
4. wound dressing according to claim 1, is characterized in that
The content of described low-melting fiber in wound dressing is by weight between 2-85%, preferably between 2-55%, more preferably between 2-45%; And/or
The content of described polysaccharide fiber in wound dressing is by weight between 15-98%, preferably between 45-98%, more preferably between 55-98%.
5. wound dressing according to claim 1, is characterized in that
Described 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; And/or
Described 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.
6. wound dressing according to claim 1, is characterized in that
Also contain the antibacterial of 0.001-25% by weight in described polysaccharide fiber and/or low-melting fiber, antibacterial is selected from: one or more in silver, silver compound, silver-colored network and thing, PHMB and Mel.
7. wound dressing according to claim 1, is characterized in that
Wound dressing is single layer structure or multiple structure;
Preferably, when wound dressing is multiple structure, multiple structure is alternately superposeed and makes by the stratum reticulare that comprises polysaccharide fiber and the stratum reticulare that comprises low-melting fiber, between stratum reticulare, forms and interweaves, and between whole or local low-melting fiber, forms clinkering point.
8. a non-weaving cloth, it obtains wound dressing according to claim 1 through processing, and wherein said processing is selected from and cuts, a step or multistep in packing and sterilization steps.
9. the manufacture method of wound dressing according to claim 1, it comprises step:
1) low-melting fiber and polysaccharide fiber are evenly mixed;
2) shredding;
3) combing;
4) become net;
5) become cloth;
6) cut;
7) packing; With
8) sterilizing,
It is characterized in that, when becoming cloth or comprise afterwards heat treated step.
10. the manufacture method of wound dressing according to claim 1, it comprises step:
1) by low-melting fiber and polysaccharide fiber shredding respectively;
2) combing respectively;
3) become respectively net;
Alternately stack of the stratum reticulare that 4) will comprise the stratum reticulare of low-melting fiber and comprise polysaccharide fiber;
5) form and interweave between stratum reticulare;
6) become cloth;
7) cut;
8) packing; With
9) sterilizing,
It is characterized in that, when becoming cloth or comprise afterwards heat treated step.
11. according to the described manufacture method of claim 9 or 10, wherein
Described heat treatment comprises step:
I) non-weaving cloth is placed in to the melting temperature of low-melting fiber, keeps certain hour, preferably 1-3 minute;
Ii) be cooled to ambient temperature;
Or
Described heat treatment comprises step:
I) non-weaving cloth is placed between a pair of pressure roller to the certain hour that pressurizes, preferred 1-3 minute, the roller surface temperature reaches the fusing point of low-melting fiber;
Ii) be cooled to ambient temperature;
Or
Described heat treatment comprises step:
I) non-weaving cloth is placed between ultrasonic head and lower roll, utilizes high-frequency ultrasonic to reach the fusing point of low-melting fiber;
Ii) non-weaving cloth is shifted out to the ultrasound wave Head Section, be cooled to ambient temperature.
12., according to the described manufacture method of claim 9 or 10, a fusing point during atmospheric pressure of described low-melting fiber is between 90-180 ℃.
13. according to the described manufacture method of claim 9 or 10, wherein:
The fibre length of described polysaccharide fiber and low-melting fiber is the 3-105 millimeter; And/or
The fineness of described polysaccharide fiber and low-melting fiber is 1-10dtex; And/or
Described low-melting fiber is by weight between 2-85%, preferably between 2-55%, more preferably between 2-45%; And/or
Described polysaccharide fiber is by weight between 15-98%, preferably between 45-98%, more preferably between 55-98%; And/or
Described 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;
Described 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; And/or
Also contain the antibacterial of 0.001-25% by weight in described polysaccharide fiber or low-melting fiber, antibacterial is selected from: one or more in silver, silver compound, silver-colored network and thing, PHMB and Mel.
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| WO2016206638A1 (en) * | 2015-06-25 | 2016-12-29 | 佛山市优特医疗科技有限公司 | Wound dressing containing silver chelate fiber |
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| WO2016206638A1 (en) * | 2015-06-25 | 2016-12-29 | 佛山市优特医疗科技有限公司 | Wound dressing containing silver chelate fiber |
| CN105287105A (en) * | 2015-11-24 | 2016-02-03 | 浙江安生医用材料科技有限公司 | Coating-free anti-adhesion absorbent pad and production process thereof |
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| WO2019140572A1 (en) * | 2018-01-17 | 2019-07-25 | 惠州华阳医疗器械有限公司 | Wound dressing and manufacturing method thereof |
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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 |
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| CN115807275A (en) * | 2021-09-13 | 2023-03-17 | 北京林业大学 | Medical antibacterial mask made of regenerated cellulose non-woven fabric and preparation method of medical antibacterial mask |
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