CN102733096B - Non-allergenic fully-degradable medical and hygienic non-woven material capable of adjusting moisture - Google Patents
Non-allergenic fully-degradable medical and hygienic non-woven material capable of adjusting moisture Download PDFInfo
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- CN102733096B CN102733096B CN201210194119.8A CN201210194119A CN102733096B CN 102733096 B CN102733096 B CN 102733096B CN 201210194119 A CN201210194119 A CN 201210194119A CN 102733096 B CN102733096 B CN 102733096B
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- Nonwoven Fabrics (AREA)
Abstract
The invention discloses a non-allergenic fully-degradable medical and hygienic non-woven material capable of adjusting moisture, and aims to solve the problem that the conventional degradable medical and hygienic materials are mainly made by a spunbonding method, and certain production processes are complex. The non-allergenic fully-degradable medical and hygienic non-woven material consists of the following raw materials of 60 to 80 mass percent of polylactic acid fibers and 20 to 40 mass percent of Tencel fibers and is prepared by the following steps of: preparing Tencel fiber non-woven paper by a wet laying method, wherein part of the Tencel fiber non-woven paper is fibrillated; pre-treating the polylactic acid fibers and preparing a polylactic acid fiber web; unreeling the non-woven paper on the polylactic acid fiber web once again, interweaving the fibrillated Tencel fibers with the polylactic acid fiber web by a high-pressure spraying method, and fibrillating the Tencel fibers further; and drying at proper temperature to bind the fibrillated Tencel fibers to the periphery of the polylactic acid fibers firmly. The non-allergenic fully-degradable medical and hygienic non-woven material has the characteristics of non-allergenic property and capacity of adjusting the moisture, and can be degraded fully after being discarded.
Description
Technical field
The present invention relates to disposable medical hygienic material, as medical dressing, gauze, sanitary napkin, protection pad etc., be particularly a kind ofly difficult for sensitization, there is moisture marquis regulatory function, antibacterial taste removal, ventilative smooth, powerful good and medical and health use non-woven material that can be degradable.
Background technology
Disposable medical hygienic material refers to the disposable medical running stores such as the bandage, gauze and the medical sheet that use in hospital; Disposable sanitary articles also claims absorbability with abandoning product, comprises sanltary towel, panty liner, diaper for babies, adult's paper nappy and other adult-incontinence articles, pet pads etc.China's sanitary napkin consumption has reached annual more than 700 hundred million in recent years, more than 270 hundred million of protection pads, and more than 120 hundred million of paper diaper, year this kind disposable hygienic material rubbish of generation exceedes 5,500,000 tons, and a year consumption health care nonwoven fabric can reach 70～9,000,000,000 m
2above, so huge garbage discharge amount makes the environment that we depend on for existence be difficult to heavy burden, and being therefore badly in need of finding can be degradable and possess the product of good use function.
The document that relates at present making degradable medical and health mainly contains:
The open a kind of degraded acid fiber by polylactic SMS composite non-weaving cloth of patent CN201010163359.2, to be composited by autoadhesion or hot rolling, wherein intermediate layer is PLA melt spraying non-woven fabrics, the upper and lower in intermediate layer are PLA spun-bonded non-woven fabrics, there is strainability and shielding properties, be applicable to hygienic material and packaging material field.
Patent CN200510017754.9 discloses a kind of polylactic acid medical viscose non-woven material, adopt the production technology of viscose non-woven material, reinforce operation by pre-crystallized drying process, screw extruding operation, spinning process, air drawing operation, one-tenth net operation and hot pressing and complete, be mainly used in making medical operation clothes, mouth mask, cap.
Patent CN200810004420.1 discloses a kind of corn polylactic acid short-fiber spunlaced face mask, it is application spunlace non-woven cloth production technology, produce the processing technology non-weaving cloth process from weaving process and the water acupuncture manipulation of adjusting acid fiber by polylactic, realizing corn polylactic acid short-fiber is the spunlaced face mask production of raw material.
Patent CN201010250346.9 discloses a kind of biodegradable polydactyl acid nonwoven fabric, adopt polylactic resin: 100 parts, the three-element copolymerized ester that terephthalic acid (TPA), aliphatic hydrocarbon binary acid and the polymerization of aliphatic hydrocarbon dihydroxylic alcohols obtain: 10～50 parts, inorganic filler: 5～40 parts, plasticizer: 1～20 part, above-mentioned raw materials is made through mixed refining, extruding pelletization, there is performance and the eco-friendly advantage of complete biodegradable, can be applicable in multiple fields.
Patent CN200910035089.4 discloses a kind of fully degradable polylactic acid fiber spunlace fabric, employing fineness is 0.6dtex～1.2dtex, the length acid fiber by polylactic that is 25mm～72mm by being crossed as net, Hydroentangled and dry and form, its thickness is 0.2mm～1.2mm, can be used for making the skin-material of child care products and feminine care products.
Take a broad view of existing documents and materials situation, the degradable medical and health of developing is taking spun-bond process as main, also more complicated of some production technology, due to raw materials used and difference production method, causes serviceability, the consumer group who faces and final Application Areas also different.
Summary of the invention
The object of this invention is to provide a kind of degradable medical and health use non-woven material that is difficult for sensitization, adjustable moisture, it makes part fibrillation tencel fiber non-woven paper by the method that adopts wet-laying, reinforcing hydraulic pressure by reasonable control high-pressure spray is evenly distributed in PLA fibre web tencel fiber, and further produce fibrillation, by selecting suitable bake out temperature that fibrillation tencel fiber secure bond is made around acid fiber by polylactic.
For achieving the above object, the technical solution used in the present invention is: one is difficult for sensitization, the degradable medical and health use non-woven material of adjustable moisture, it is characterized in that, raw material and mass percent thereof that it adopts are acid fiber by polylactic 60-80%, tencel fiber 20-40%, the length of described tencel fiber is 1-10mm, line density is 1.1-3.3dtex, the length of described acid fiber by polylactic is 38-51mm, fineness is 1.67-3.3dtex, the preparation method of degradable medical and health use non-woven material is as follows: first, wet-laying method in tencel fiber employing nonwoven production is made to the tencel fiber non-woven paper of part fibrillation, original fiber degree reaches 50-70%, secondly, acid fiber by polylactic is carried out to preliminary treatment, and make PLA fibre web, then, the tencel fiber non-woven paper of fibrillation is unreeled on PLA fibre web, the method that adopts high-pressure spray to reinforce, is punctured in PLA fibre web the tencel fiber of fibrillation, and makes the tencel fiber of fibrillation further produce fibrillation, finally, select suitable bake out temperature by the tencel fiber secure bond of fibrillation around acid fiber by polylactic, finally obtain in length and breadth to brute force than the non-woven material that is close to 1:1, the thickness of degradable medical and health use non-woven material is 0.1-0.4mm, weight 28-60 gram/square meter.
As preferably, while adopting wet-laying method to make the tencel fiber non-woven paper of part fibrillation, being controlled to net concentration of slurry is between 0.01%-0.05%, beating time 30-90 minute, controlling beating degree is between 50-70 ° of SR, tensile strength between 0.15-0.6KN/m, the 5-20 gram/square meter of tencel fiber non-woven paper grammes per square metre of fibrillation.
As preferably, in the method for reinforcing at high-pressure spray, impel tencel fiber further to produce fibrillation by reasonable control hydraulic pressure, original fiber degree reaches 70-90%.
As preferably, described high-pressure spray adopts eight road water thorn reinforcings to make tencel fiber further produce fibrillation while reinforcing, eight road water thorns are reinforced hydraulic pressure used and are respectively: 10-30,100-120,110-120,140-160,90-100,100-120,120-130bar.
As preferably, the preprocessing process of described acid fiber by polylactic is: the antistatic additive mixed liquor that acid fiber by polylactic is sprayed to total weight of fiber 3-10%, then cover with the vexed 20-28 of Polypropylence Sheet hour and carry out soft moisture absorption processing, make acid fiber by polylactic regain reach 5-10%, the water that the antistatic additive that antistatic additive mixed liquor is 1-3% by mass percent and mass percent are 97-99% forms.
As preferably, while making PLA fibre web, reduce the damage to acid fiber by polylactic by reducing combing speed, wherein controlling cylinder speed is 950-1100 m/min, working roll speed is 59-75 m/min, upper angle stripper speed is 26-30 m/min, and lower angle stripper speed is 31-42 m/min, upper Condensing Roller speed 50-65.8 m/min, lower Condensing Roller speed 41.5-58.5 m/min, upper doffer speed is 62-75 m/min, and lower doffer speed is 69-78 m/min, and speed of production is 28-40 m/min.
Tencel fiber and acid fiber by polylactic are ecological, environmental protective fiber types, and wherein tencel fiber is a kind of regenerated celulose fibre, by adopting organic solvent (NMMO) spinning technique, under physical action, complete, and whole manufacture process is nontoxic, pollution-free; Acid fiber by polylactic is taking cornstarch as raw material, the series of processes such as condensation by fermentation,, polymerization, spinning are made, owing to containing lactic acid, surface is faintly acid, there is good biocidal property and eliminate odor function, be applicable to very much making medical and health use material, but acid fiber by polylactic regain is only between 0.4-0.6%, hygroscopicity is poor, by using, through good process adjustments, can reach the object of learning from other's strong points to offset one's weaknesses completely together with tencel fiber.In addition, acid fiber by polylactic fusing point is 170 DEG C, and vitrification point is only 57 DEG C of left and right, in production process very easily there is melting and become particle state in fiber, thereby it is larger directly to adopt 100% acid fiber by polylactic to carry out difficulty of processing, therefore must choose reasonable production technology, produce at a slow speed.
When oven dry, oven temperature control is between 120-130 DEG C, securely the tencel fiber of fibrillation is cemented in around acid fiber by polylactic.
The described degradable medical and health use non-woven material that is difficult for sensitization, adjustable moisture, degradable medical and health use non-woven material is cut into width and is respectively the rouleau of 4cm, 9cm and 17cm, length 800-1000 rice, be used for making dressing, bandage, the skin-material of sanitary napkin and protection pad.
Degradable medical and health use non-woven material of the present invention have be difficult for sensitization, possess moisture marquis regulatory function, antibacterial taste removal, ventilative smooth, powerful good feature, and can be degradable after abandoning, be the ideal material of making disposable medical amenities top layer.
The invention has the advantages that:
1) utilize nonwoven fabric wet method technical method into the net, adopt ultrashort tencel fiber to make tencel fiber non-woven paper, make a day silk original fiber degree reach 50-70% by reasonable control beating process, make a day silk superfine fibre non-woven paper, by the control of the series of parameters such as beating degree, beating time, the tensile strength that obtains lower sky silk non-woven paper, is beneficial under follow-up high-pressure spray effect, and tencel fiber can better be dispersed in acid fiber by polylactic base net.
2) fibrillation sky silk superfine fibre non-woven paper and PLA fibre web are combined with each other through the impact of high-pressure spray, make tencel fiber further produce fibrillation, original fiber degree reaches 70-90%; Under the effect of high-pressure spray, tencel fiber produces dispersion in non-woven paper simultaneously, is punctured in PLA fibre web, makes acid fiber and tencel fiber be mixed into a nonwoven fabric entirety, and tencel fiber is evenly distributed on top layer and the inside of PLA fibre web.Owing to having adopted ultrashort tencel fiber, by reasonable control high-pressure spray technique, make the inclined PLA fibre web surrounding that is inserted into of most tencel fibers, the fine fleece of tencel fiber fibrillation has formed numerous up big and down small bellmouth in fibre web, is particularly conducive to seeing through of liquid and moisture.
3) acid fiber by polylactic hygroscopicity is poor, well leads moistly but have, thereby has increased seeing through and leading moistly of liquid, and tencel fiber is to be basic composition unit by cellulose, itself has good hygroscopicity.Therefore, leading that the unique texture of comprehensive fibrillation tencel fiber and PLA fibre web, hygroscopicity, the acid fiber by polylactic that tencel fiber itself is good are good is moist, finally give moisture absorption, moisture-inhibiting and gas permeability that PLA and tencel fiber non-woven material are good, played good moisture marquis regulatory function.
4) PLA and tencel fiber cross section are circle, and outer surface is all very smooth, add tencel fiber after fibrillation and reached the form of superfine fibre, soft fine and smooth, good to human body skin affinity, are difficult for sensitization; And acid fiber by polylactic surface be weak acid characteristic, there is good antibacterial and eliminating the unusual smell property, give containing the non-woven material of PLA and tencel fiber better non-sensitization and antibacterial function of odor removal be provided.
In a word, rational proportion by acid fiber by polylactic and ultrashort tencel fiber is selected, the reasonable control of processing technology, reach mutual supplement with each other's advantages, the performance of maximum magnitude is the advantageous feature of fiber separately, can obtain smooth surface exquisiteness, be difficult for sensitization, possess moisture marquis regulatory function, antibacterial taste removal, ventilative smooth, powerful good medical and health use degradable medical and health use non-woven material, there is extraordinary popularization and prospect of the application.
Detailed description of the invention
The technological process that the present invention prepares degradable medical and health use non-woven material is divided into following two steps:
1) ultrashort tencel fiber → preparation suspends, and pulping → tiltedly net becomes net → oven dry → rolling in slurry → fibrillation making beating → storage slurry → dilution.
Embodiment 1
Selecting tencel fiber length is 5mm, and fineness is 3.3dtex, and being controlled to net concentration of slurry is 0.04%, beating time 65 minutes, controlling beating degree is 50 ° of SR, makes tencel fiber original fiber degree reach 60%, make 9 grams/square meter of non-woven paper grammes per square metre, tensile strength is at 0.2KN/m.Select acid fiber by polylactic length 38mm, fineness is 2.2dtex, first acid fiber by polylactic is carried out to preliminary treatment, preprocessing process is: acid fiber by polylactic is sprayed to total weight of fiber 8% antistatic additive mixed liquor, the antistatic additive that antistatic additive mixed liquor is 3% by mass percent and mass percent are that 97% water forms, then cover with Polypropylence Sheet and carry out soft moisture absorption processing in vexed 28 hours, make acid fiber by polylactic regain reach 8%.Then acid fiber by polylactic process is mixed to shredding, feed cotton and combing, after cross lapping, make 100% PLA fibre web, fibrillation tencel fiber unreels and is laid on PLA fibre web, reinforce through high-pressure spray, cooling, rolling, trimming, after unreeling and cut rouleau, make, main technologic parameters is: cylinder speed is 958 ms/min, working roll speed is 60.5 ms/min, upper angle stripper speed is 27.1 ms/min, lower angle stripper speed is 32.9 ms/min, 51.8 ms/min of upper Condensing Roller speed, 42 ms/min of lower Condensing Roller speed, upper doffer speed is 64.5 ms/min, lower doffer speed is 70.1 ms/min.10,110,115,145,95,110,123,125bar high-pressure spray adds man-hours eight road pressure settings:, when oven dry, oven temperature control is 128 DEG C, and speed of production is 29 ms/min.Finally make 30 grams/square meter of weight, thickness is 0.22mm, and the rouleau that is simultaneously cut into 17cm is for subsequent use.
Strength test adopts YG (B) 026H type imported electronic fabric strength tester, according to standard, GB/T3923.1-1997 tests, test cloth specimen specification is 50mm*350mm, record can degradable PLA nonwoven skin-material warp-wise ultimate strength be 61.8(N/5cm), broadwise ultimate strength is 62.6(N/5cm).
Poisture-penetrability test adopts Lck-131 vapor transfer rate analyzer, tests according to standard GB/T12704.2-2009.Test cloth specimen diameter is 70mm, and recording degradable PLA nonwoven skin-material vapor transfer rate to be 5033.3(g/ (m
2d)).
Capillary effect adopts YG871 capillary effect analyzer, tests according to standard ZB W 04019-1990.Test cloth specimen specification 25mm*300mm, measuring 60s suction head is 4.5mm.
Gas permeability test adopts YG461E type gurley permeameter, tests according to standard GB/T5453-1997.Adjustment test pressure differential is 60Pa, selects nozzle diameter 5mm, and recording air penetrability is 1987.5(mm/s).
Embodiment 2
Selecting tencel fiber length is 3mm, and fineness is 2.2dtex, and being controlled to net concentration of slurry is 0.03%, beating time 70 minutes, controlling beating degree is 55 ° of SR, makes tencel fiber original fiber degree reach 65%, make 15 grams/square meter of non-woven paper grammes per square metre, tensile strength is at 0.35KN/m.Select acid fiber by polylactic length 38mm, fineness is 1.67dtex, first acid fiber by polylactic is carried out to preliminary treatment, preprocessing process is: acid fiber by polylactic is sprayed to total weight of fiber 5% antistatic additive mixed liquor, the antistatic additive that antistatic additive mixed liquor is 2% by mass percent and mass percent are that 98% water forms, then cover with Polypropylence Sheet and carry out soft moisture absorption processing in vexed 24 hours, make acid fiber by polylactic regain reach 5%.Then acid fiber by polylactic process is mixed to shredding, feed cotton and combing, after cross lapping, make PLA fibre web, fibrillation tencel fiber unreels and is laid on PLA fibre web, reinforce through high-pressure spray, cooling, rolling, trimming, after unreeling and cut rouleau, make, main technologic parameters is: cylinder speed is 1008 ms/min, working roll speed is 65.5 ms/min, upper angle stripper speed is 29.5 ms/min, lower angle stripper speed is 38.8 ms/min, 55.6 ms/min of upper Condensing Roller speed, 53.6 ms/min of lower Condensing Roller speed, upper doffer speed is 68.5 ms/min, lower doffer speed is 75.8 ms/min.15,115,120,158,100,115,129,130bar high-pressure spray adds man-hours eight road pressure settings:, when oven dry, oven temperature control is 130 DEG C, and speed of production is 35 ms/min.Finally make 40 grams/square meter of weight, thickness is 0.28mm.
Strength test adopts YG (B) 026H type imported electronic fabric strength tester, according to standard, GB/T3923.1-1997 tests, test cloth specimen specification is 50mm*350mm, record can degradable PLA nonwoven skin-material warp-wise ultimate strength be 92.86(N/5cm), broadwise ultimate strength is 93.6(N/5cm).
Poisture-penetrability test adopts Lck-131 vapor transfer rate analyzer, tests according to standard GB/T12704.2-2009.Test cloth specimen diameter is 70mm, and recording degradable PLA nonwoven skin-material vapor transfer rate to be 4919.8(g/ (m
2d)).
Capillary effect adopts YG871 capillary effect analyzer, tests according to standard ZB W 04019-1990.Test cloth specimen specification 25mm*300mm, measuring 60s suction head is 3.8mm.
Gas permeability test adopts YG461E type gurley permeameter, tests according to standard GB/T5453-1997.Adjustment test pressure differential is 60Pa, selects nozzle diameter 5mm, and recording air penetrability is 1886.5(mm/s).
Embodiment 3
Selecting tencel fiber length is 6mm, and fineness is 3.3dtex, and being controlled to net concentration of slurry is 0.05%, beating time 90 minutes, controlling beating degree is 65 ° of SR, makes tencel fiber original fiber degree reach 55%, make 18 grams/square meter of non-woven paper grammes per square metre, tensile strength is at 0.48KN/m.Select acid fiber by polylactic length 51mm, fineness is 3.3dtex, first acid fiber by polylactic is carried out to preliminary treatment, preprocessing process is: acid fiber by polylactic is sprayed to total weight of fiber 5% antistatic additive mixed liquor, the antistatic additive that antistatic additive mixed liquor is 2% by mass percent and mass percent are that 98% water forms, then cover with Polypropylence Sheet and carry out soft moisture absorption processing in vexed 24 hours, make acid fiber by polylactic regain reach 8%.Then acid fiber by polylactic process is mixed to shredding, feed cotton and combing, after cross lapping, make PLA fibre web, fibrillation tencel fiber unreels and is laid on PLA fibre web, reinforce through high-pressure spray, cooling, rolling, trimming, after unreeling and cut rouleau, make, main technologic parameters is: cylinder speed is 989 ms/min, working roll speed is 62.8 ms/min, upper angle stripper speed is 27.8 ms/min, lower angle stripper speed is 36.3 ms/min, 53.1 ms/min of upper Condensing Roller speed, 48.5 ms/min of lower Condensing Roller speed, upper doffer speed is 66.7 ms/min, lower doffer speed is 75.6 ms/min.13,110,115,150,95,110,120,125bar high-pressure spray adds man-hours eight road pressure settings:, when oven dry, oven temperature control is 128 DEG C, and speed of production is 29 ms/min.Finally make 45 grams/square meter of weight, thickness is 0.31mm, and the rouleau that is simultaneously cut into 4cm is for subsequent use.
Strength test adopts YG (B) 026H type imported electronic fabric strength tester, according to standard, GB/T3923.1-1997 tests, test cloth specimen specification is 50mm*350mm, record can degradable PLA nonwoven skin-material warp-wise ultimate strength be 117.72(N/5cm), broadwise ultimate strength is 118.4(N/5cm).
Poisture-penetrability test adopts Lck-131 vapor transfer rate analyzer, tests according to standard GB/T12704.2-2009.Test cloth specimen diameter is 70mm, and recording degradable PLA nonwoven skin-material vapor transfer rate to be 4732.67(g/ (m
2d)).
Capillary effect adopts YG871 capillary effect analyzer, tests according to standard ZB W 04019-1990.Test cloth specimen specification 25mm*300mm, measuring 60s suction head is 3.5mm.
Gas permeability test adopts YG461E type gurley permeameter, tests according to standard GB/T5453-1997.Adjustment test pressure differential is 60Pa, selects nozzle diameter 5mm, and recording air penetrability is 1535.8mm/s).
Claims (5)
1. one kind is difficult for sensitization, the degradable medical and health use non-woven material of adjustable moisture, it is characterized in that, raw material and mass percent thereof that it adopts are acid fiber by polylactic 60-80%, tencel fiber 20-40%, the length of described tencel fiber is 1-10mm, line density is 1.1-3.3dtex, the length of described acid fiber by polylactic is 38-51mm, fineness is 1.67-3.3dtex, the preparation method of degradable medical and health use non-woven material is as follows: first, wet-laying method in tencel fiber employing nonwoven production is made to the tencel fiber non-woven paper of part fibrillation, original fiber degree reaches 50-70%, secondly, acid fiber by polylactic is carried out to preliminary treatment, and make PLA fibre web, then, the tencel fiber non-woven paper of fibrillation is unreeled on PLA fibre web, the method that adopts high-pressure spray to reinforce, is punctured in PLA fibre web the tencel fiber of fibrillation, and makes the tencel fiber of fibrillation further produce fibrillation, finally, select suitable bake out temperature by the tencel fiber secure bond of fibrillation around acid fiber by polylactic, the thickness of degradable medical and health use non-woven material is 0.1-0.4mm, weight 28-60 gram/square meter.
2. the degradable medical and health use non-woven material that is difficult for sensitization, adjustable moisture as claimed in claim 1, it is characterized in that, while adopting wet-laying method to make the tencel fiber non-woven paper of part fibrillation, being controlled to net concentration of slurry is between 0.01%-0.05%, beating time 30-90 minute, control beating degree be between 50-70 ° of SR, tensile strength between 0.15-0.6KN/m, the 5-20 gram/square meter of tencel fiber non-woven paper grammes per square metre of fibrillation.
3. the degradable medical and health use non-woven material that is difficult for sensitization, adjustable moisture as claimed in claim 1, it is characterized in that, in the method for reinforcing at high-pressure spray, impel tencel fiber further to produce fibrillation by reasonable control hydraulic pressure, original fiber degree reaches 70-90%.
4. the degradable medical and health use non-woven material that is difficult for sensitization, adjustable moisture as claimed in claim 1, it is characterized in that, the preprocessing process of described acid fiber by polylactic is: the antistatic additive mixed liquor that acid fiber by polylactic is sprayed to total weight of fiber 3-10%, then cover with the vexed 20-28 of Polypropylence Sheet hour and carry out soft moisture absorption processing, make acid fiber by polylactic regain reach 5-10%, the water that the antistatic additive that antistatic additive mixed liquor is 1-3% by mass percent and mass percent are 97-99% forms.
5. the sensitization that is difficult for as claimed in claim 1, the degradable medical and health use non-woven material of adjustable moisture, it is characterized in that, while making PLA fibre web, reduce the damage to acid fiber by polylactic by reducing combing speed, wherein controlling cylinder speed is 950-1100 m/min, working roll speed is 59-75 m/min, upper angle stripper speed is 26-30 m/min, lower angle stripper speed is 31-42 m/min, upper Condensing Roller speed 50-65.8 m/min, lower Condensing Roller speed 41.5-58.5 m/min, upper doffer speed is 62-75 m/min, lower doffer speed is 69-78 m/min, speed of production is 28-40 m/min.
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| CN103088553A (en) * | 2013-01-21 | 2013-05-08 | 苏州美森无纺科技有限公司 | Degradable bio-fiber wiping material and preparation method thereof |
| CN104975492B (en) * | 2015-07-16 | 2017-02-01 | 嘉兴学院 | Preparation method and application of kapok fiber non-woven mask base material |
| CN105879105B (en) * | 2016-04-08 | 2019-03-08 | 哈尔滨工业大学 | A kind of compound Chinese medicinal stone functional fibre skin-material of sanitary napkin and preparation method thereof |
| CN106176043A (en) * | 2016-08-26 | 2016-12-07 | 苏州美迪斯医疗运动用品股份有限公司 | Self-adhesive elastic bandage and preparation method thereof |
| CN112709001B (en) * | 2020-12-18 | 2022-06-10 | 苏州谷原生物科技有限公司 | One-step formed completely-degradable plane mask body and preparation method thereof |
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| US20100176210A1 (en) * | 2009-01-09 | 2010-07-15 | Porex Corporation | Hydrophilic Porous Wicks for Vaporizable Materials |
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