CN102127841B - Production method of cellulose non-woven fabric with functions of mildew proofing, antibiosis and deodorization through wet-type meltbrown - Google Patents
Production method of cellulose non-woven fabric with functions of mildew proofing, antibiosis and deodorization through wet-type meltbrown Download PDFInfo
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Abstract
The invention provides a production method of a cellulose non-woven fabric with functions of mildew proofing, antibiosis and deodorization through wet-type meltbrown, comprising the following steps of: adding natural chitosan macromolecules subjected to functionalized modification and nanocrystallization into a size prepared from pulp and N-methylmorpholine N-oxide (short for NMMO) to be mixed and dissolved to form a dope; then spraying the dope from a spinning nozzle in a meltbrown way to form a non-woven fabric silk net, and carrying out water mist solidification and regeneration; and finally, washing with water, rolling with a squirt cut, drying, rolling and carrying out other procedures to obtain a natural cellulose non-woven fabric with functions of mildew proofing, antibiosis and deodorization and a continuous filament form. The cellulose non-woven fabric with functions of mildew proofing, antibiosis and deodorization can be applied to wiping textiles, medical consumables, filtering materials, biotechnical materials, photoelectric wafers and the like with functions of mildew proofing, antibiosis and deodorization.
Description
[technical field]
The invention relates to a kind of with wet type, melt and spray there is mildew-resistant, the method for making of antibacterial and deodorization functions cellulose Nonwovens, especially refer to a kind of environmental protection processing procedure that there is low manufacturing cost and can not cause environmental pollution, the Nonwovens finished product that it makes belongs to long fiber kenel, and there is mildew-resistant, antibacterial and deodorization functions, and then can be applied in the purposes such as textiles, medical and health, filtering material, biotechnology material and the wiping of photoelectricity wafer.
[background technology]
The current made Nonwovens of artificial synthetic fiber, it is the high molecular polymerization raw material by melting, with direct extrusion molding (spunlaid), through extruding, extend to form after continuous long fiber, be stacked into again net form and formed Nonwovens finished product, because of long fiber, can give Nonwovens and there is the physical property such as good gas permeability and water absorption rate, therefore be widely used in large quantities on fields such as amenities, wiping material, medical protection and filter material, and according to the statistics of U.S. Nonwovens TIA (INDA), the city of this artificial synthetic fiber's Nonwovens accounts for rate from the 33.5%(second of 1994) grow to first of the 43.7%(of 2009), whole output also reaches annual 2.7 hundred ten thousand tons, and its maximum raw material using in producing, be sequentially polypropylene (PP), polyester (PET), polyethylene (PE) and nylon (Nylon), account for altogether 96% of total use amount, therefore when these a large amount of artificial synthetic fiber's Nonwovenss become discarded object after using, owing to being decomposed by natural environment, on the contrary environment is produced to huge bad impact results.
Another chitin, spherical chitosan are the straight chain shape high molecular polymers being formed with β-Isosorbide-5-Nitrae bond by monomer N-acetyl grape amine candy and grape amine candy; Chitin class material distributes very wide at occurring in nature, also contain quite abundant chitin in shrimp and crab shells, and with regard to the viewpoint of food processing waste utilization, chitin and spherical chitosan are quite worth being developed.In addition, output and the output value of the processing of shrimp crab, Taiwan aquatic products processing product main projects for a long time, in its discarded object, be rich in the valuable compositions such as protein, astacin, chitin, if do not processed, very easily cause the burden of ecological environment, if can be by it utilization to manufacture the product of high value, can not only solve the problem of discarded object, can increase economic value again, be to serve multiple.
Moreover; the crust of shrimp crab class approximately can obtain 20～30% chitin class material after suitable purifying; if wish to get the spherical chitosan of multiple different degree of acetylation; only chitin just can need be obtained in the acetyl processing of going through high temperature thermokalite; and chitin/spherical chitosan has Biodegradable and bio-compatibility; except to environment without injury, have more excellent mildew-resistant, antibacterial and deodorization functions texts.
Therefore, as making, how natural fabric raw material and low-cost processing procedure there is excellent mildew-resistant, the Nonwovens product of the long fiber kenel of antibacterial and deodorization functions, just become important business anxious to be broken through.
[summary of the invention]
Main purpose of the present invention is to provide a kind of and melts and sprays and have mildew-resistant with wet type, the method for making of antibacterial and deodorization functions cellulose Nonwovens, that the natural spherical chitosan macromolecule (chitosan) through functionalized modification and nanometer is added with wood pulp (pulp) and methyl morpholine oxide (N-methylmorpholine N-oxide, abbreviation NMMO) in the slurries that are deployed into, make its phase mixed dissolution become mucus (dope), to melt and spray mode (meltbrown), this mucus is formed to Nonwovens silk screen from spinning a mouthful ejection again, through water smoke, solidify regeneration, finally by washing, liquid drugs injection rolls, be dried and batch after supervisor, can make continuous long fiber silk kenel and there is mildew-resistant, the native cellulose Nonwovens of antibacterial and deodorization functions, because this processing procedure is short, make manufacturing cost reduce, and because using avirulent methyl morpholine oxide as solvent and can fully recycling, and become not can be to environment environmental protection processing procedure, this native cellulose Nonwovens of making still can be possessed original mildew-resistant, antibacterial and deodorization functions through washing 10 times simultaneously.
Another object of the present invention is to provide a kind of melts and sprays and has mildew-resistant with wet type, the method for making of antibacterial and deodorization functions cellulose Nonwovens, according to the method is obtained, there is mildew-resistant, the native cellulose Nonwovens of antibacterial and deodorization functions, can be applicable to textiles, health care material, filter material, in the purposes such as biotechnology material and the wiping of photoelectricity wafer, and can reduce human body, agriculture fishery livestock or article are by the probability of infected by microbes, and the generation that reduces generation stink, and because belonging to continuous fiber kenel, except having the physical property such as the fine air permeability identical with artificial synthetic fiber's Nonwovens and water absorption rate, when it becomes discarded object after using, can be in environment natural decomposition, and can not damage environment.
Technical scheme of the present invention is: a kind of with wet type, melt and spray there is mildew-resistant, the method for making of antibacterial and deodorization functions cellulose Nonwovens, it is characterized in that: step comprises:
A. the wood pulp (pulp) of take is raw material; Select α-content of cellulose is at the wood pulp cellulose of more than 85% long and short fiber, and its cellulosic degree of polymerization (degree of polymerization is called for short DP) is between 500～1200;
B. add methyl morpholine oxide solvent (N-methylmorpholine N-oxide is called for short NMMO) in wood pulp, and dissolve the slurries that are deployed into wood pulp and methyl morpholine oxide;
C. the natural spherical chitosan macromolecule (chitosan) through functionalized modification and nanometer is added in the slurries that above-mentioned wood pulp and methyl morpholine oxide be deployed into, and make it be mixed to form mutually mucus (dope); It is to utilize horizontal paste mixer, after inserting by this wood pulp cellulose, methyl morpholine oxide solvent and together with the natural spherical chitosan of functionalized modification and nanometer, with 60 ℃～80 ℃ low temperature, carry out high-speed stirred, recycling Vacuum film evaporation device is with 80 ℃～120 ℃ heating, in 5 minutes, evaporation is dissolved mixed moisture content eliminating to 5～13%, can form mucus (dope)
D. to melt and spray mode (meltbrown), mucus is formed to cellulose tow from spinning a mouthful ejection; And
E. spray water smoke and make cellulose tow solidify regeneration, more sequentially through washing, liquid drugs injection rolls, dry and batch supervisor, make continuous long fiber silk kenel and there is the native cellulose Nonwovens of mildew-resistant, antibacterial and deodorization functions.
Wherein, in this step c, natural spherical chitosan is that to discard shrimp and crab shells be raw material, makes its separation and purification after peracid, alkali treatment, and the degree of deacetylation of its obtained spherical chitosan (degree of deacetylation) is between 50%～99%.
Wherein, in this step b, the concentration of methyl morpholine oxide solvent is 50%～75%.
Wherein, in step e, this native cellulose Nonwovens is to be continuous filament, and the fibre number of this native cellulose fibre Nonwovens is 1～15 μ m, and the basic weight of this native cellulose Nonwovens is 10g/m
2～300g/m
2.
Wherein, in step c, the molecular weight of this spherical chitosan is 10,000～520,000.
Wherein, the content that in step c, this spherical chitosan accounts for cellulose fibre is 0.1wt%～7.0wt%.
Wherein, in step c, the content of cellulose of this mucus is 6wt%～15wt%, and this mucus viscosity is 300～3000 (poise), and this mucus printing opacity index is 1.470～1.495, and this mucus melt index is 400～1000.
Wherein, in step e, the coiling speed of this continuous long fiber silk kenel native cellulose Nonwovens is 2～200 meters per minute.
Wherein, this acid, alkali treatment acid used are hydrochloric acid (HCl) or sulfuric acid (H
2sO
4).
Wherein, this acid, alkali treatment alkali used are to be NaOH (NaOH) or potassium hydroxide (KOH).
The present invention is a kind of with wet type, melt and spray there is mildew-resistant, the method for making of antibacterial and deodorization functions cellulose Nonwovens, its advantage and effect are: because this processing procedure is short, make manufacturing cost reduce, and because using avirulent methyl morpholine oxide as solvent and can fully recycling, and become not can be to environment environmental protection processing procedure, this native cellulose Nonwovens of making still can be possessed original mildew-resistant, antibacterial and deodorization functions through washing 10 times simultaneously.According to the method is obtained, there is mildew-resistant, the native cellulose Nonwovens of antibacterial and deodorization functions, can be applicable to textiles, health care material, filter material, in the purposes such as biotechnology material and the wiping of photoelectricity wafer, and can reduce human body, agriculture fishery livestock or article are by the probability of infected by microbes, and the generation that reduces generation stink, and because belonging to continuous fiber kenel, except having the physical property such as the fine air permeability identical with artificial synthetic fiber's Nonwovens and water absorption rate, when it becomes discarded object after using, can be in environment natural decomposition, and can not damage environment.
[accompanying drawing explanation]
Fig. 1 is manufacturing process block diagram of the present invention.
Fig. 2 is the methyl morpholine oxide solvent used herein chemical structural drawing of (N-methylmorpholine N-oxide is called for short NMMO).
Fig. 3 is spherical chitosan (chitosan) chemical structural drawing that the present invention uses.
Fig. 4 melts and sprays Nonwovens illustrative view in the present invention.
Fig. 5 is manufacturing process schematic diagram of the present invention.
In figure, concrete label is as follows:
1-gear pump 2-mould
3-spins mouth pipe D-mucus
H-hot-air
[specific embodiment]
Below in conjunction with drawings and Examples, technical scheme of the present invention is described further.
Refer to shown in Fig. 1 to Fig. 5, the present invention with wet type, melt and spray there is mildew-resistant, the method for making of antibacterial and deodorization functions cellulose Nonwovens, its step comprises:
A. the wood pulp (pulp) of take is raw material; Select α-content of cellulose is at the wood pulp cellulose of more than 85% long and short fiber, and its cellulosic degree of polymerization (degree of polymerization is called for short DP) is between 500～1200;
B. add methyl morpholine oxide solvent (N-methylmorpholine N-oxide, is called for short NMMO, and its chemical constitution as shown in Figure 2) in wood pulp, and dissolve the slurries that are deployed into wood pulp and methyl morpholine oxide;
C. the natural spherical chitosan macromolecule (chitosan, its chemical constitution as shown in Figure 3) through functionalized modification and nanometer is added in the slurries that above-mentioned wood pulp and methyl morpholine oxide be deployed into, and make it be mixed to form mutually mucus (dope); It is to utilize horizontal paste mixer, after inserting by this wood pulp cellulose, methyl morpholine oxide solvent and together with the natural spherical chitosan of functionalized modification and nanometer, with 60 ℃～80 ℃ low temperature, carry out high-speed stirred, recycling Vacuum film evaporation device is with 80 ℃～120 ℃ heating, in 5 minutes, evaporation is dissolved mixed moisture content eliminating to 5～13%, can form mucus (dope)
D. to melt and spray mode (meltbrown), mucus is formed to cellulose tow from spinning a mouthful ejection; As shown in Figure 4, this mucus D is squeezed into and is spun in mouthful mould 2 by gear pump 1, enter again and spin the spinning in mouth pipe 3 of mouthful mould 2, by hot-air H, continue to pour into and spin after mouthful mould 2, and the airflow function of around discharging from spinning mouth pipe 3, force mucus D to be melted and sprayed from spin mouth pipe 3 and squeeze out the outside cellulose tow that forms;
E. spray water smoke and make cellulose tow solidify regeneration, more sequentially through washing, liquid drugs injection rolls, dry and batch supervisor (as shown in Figure 5), make continuous long fiber silk kenel and there is the native cellulose Nonwovens of mildew-resistant, antibacterial and deodorization functions.
Wherein, the concentration of the methyl morpholine oxide solvent of step b is 50%～75% and is avirulence solvent, after being washed out in water-washing process, again after filtration, after decolouring and reduced pressure concentration distillation, can be recovered and re-use, low and the rate of recovery of its proportion of goods damageds can reach more than 99.5%, not only can reduce manufacturing cost, also can not cause the pollution of environment, meet the standard of environmental protection processing procedure completely.
Wherein, in step c, natural spherical chitosan macromolecule mainly be take and is discarded shrimp and crab shells as raw material; first through peracid, alkali treatment, give separation and purification and become chitin (chitin); via removing N-acetyl group (N-acetyl group) after hot alkali treatment, form spherical chitosan (chitosan) again; finally by controlling NaOH concentration, heating-up temperature and time; and this spherical chitosan is imposed to deacetylated (deacetylation), make its degree of deacetylation between 50%
between 99%.
In step c, the content of cellulose of this mucus is 6wt%～15wt% again, and the viscosity of its mucus is 300～3000 (poise), and the printing opacity index of mucus be 1.470～1.495 and the melt index of mucus be 400～1000.
The functionalized modification of this natural spherical chitosan and the mode of nanometer in another step c, first with molecular weight, to control technology processed, during high molecular spherical chitosan is degraded into, low molecular weight spherical chitosan, again with quarternary ammonium salt technology by this, low molecular weight spherical chitosan carries out preliminary macro upgrading, finally with sol-gel process, can complete its functionalized modification and nanometer again, it possesses good biological compatibility and biologically active promotes effect.
Wherein, in step e, its coiling speed is 2～200 meters per minute.
For further proving feature of the present invention and implementing effect, be every test examples explanation as rear:
Embodiment mono-(being sample number into spectrum 1～12 of the present invention):
Get the degree of polymerization and be the spherical chitosan macromolecule (chitosan) that adds degree of deacetylation 87% and 95% in 650 wood pulp cellulose and account for the content 0.1wt%～5.0wt% in fiber with nanometer after functionalized modification; in the slurries of the deployed ratio of solvent oxidation methyl morpholine; then utilize the moisture content of Vacuum film evaporation device evaporating surplus; with 80 ℃～120 ℃ heating; in 5 minutes, get rid of moisture to 5%～13%; cellulose dissolution can be become to mucus (dope), mucus forms table as shown in Table 1.Again this mucus is delivered to melt blowing machine and is melted and sprayed with metering pump, through spinning a mouthful ejection, form a Nonwovens silk screen, with water smoke, solidify regeneration, then through washing, liquid drugs injection roll, dry and batch, complete in table one sample 1 to each mucus composition table of sample 12.
Each sample mucus of table one forms table
Embodiment bis-(being sample number into spectrum 13～24 of the present invention):
Get the degree of polymerization and be the spherical chitosan macromolecule (chitosan) that adds degree of deacetylation 87% and 95% in 1050 wood pulp cellulose and account for the content 0.1wt%～5.0wt% in fiber with nanometer after functionalized modification; in the slurries of the deployed ratio of solvent oxidation methyl morpholine; then utilize the moisture content of Vacuum film evaporation device evaporating surplus; with 80 ℃～120 ℃ heating; in 5 minutes, get rid of moisture to 5%～13%; cellulose dissolution can be become to mucus (dope), mucus forms table as shown in Table 2.Again this mucus is delivered to melt blowing machine and is melted and sprayed with metering pump, melt and spray Nonwovens and regenerate through coagulating bath, then through washing, liquid drugs injection roll, dry and batch, complete in table two sample 13 to each mucus composition table of sample 24.
Each sample mucus of table two forms table
Embodiment tri-(assessment of antimildew function):
The assessment of antimildew function adopts Staphylococcus aureus subsp.Aureus10451 for test bacterial classification, first bacterium number is cultured to 5～70E
+ 5(bacterium number/milliliter), gets the sample that test bacterium liquid 0.2ml evenly coats 0.2g, is being placed in the sample bottle of adding a cover of sterilizing, and cultivates 18 hours at 35 ℃.The BS that adds again 20ml sterilizing, acutely shake 30 times, allow test bacterial classification be scattered in solution, get solution through suitable dilution, get 1ml and carry out agar broth cultivation, condition of culture is at 35 ℃ 48 hours, then calculates colony growth number, finally according to extension rate and volume, calculates and can extrapolate actual bacterium number on sample.More than 6 repetitions are done in experiment, after total bacteria count is on average held as calculated, can judge the anti-mold effect of sample according to following formula:
A: for not adding spherical chitosan in sample, after test bacterium liquid is coated on sample, cultivate at once the bacterium number of trying to achieve with salt water sampling.
B: for not adding spherical chitosan in sample, test bacterium liquid is coated on sample and cultivated by 18 hours, cultivates the bacterium number of trying to achieve with salt water sampling.
C: for adding spherical chitosan in sample, test bacterium liquid is coated on sample and cultivated by 18 hours, cultivates the bacterium number of trying to achieve with salt water sampling.
According to testing standard judgement increment, at more than 1.6 samples and have the effect of mildew-resistant, the assessment result of each sample as shown in Table 3.
The mould proof test result of each sample as shown in Table 3
Table three is containing the antimildew function test of spherical chitosan cellulose Nonwovens
Embodiment tetra-(assessment of antibacterial functions):
It is test bacterial classification that the assessment of antibacterial functions adopts staphylococcus aureus (ATCC6538P) and pneumobacillus (ATCC4352).The derivative of spherical chitosan after by chitin deacetylation, be a kind of Nantural non-toxic, can anti-bacteria and biological decomposable macromolecule.Owing to can being combined the negative electricity position on protein in the positive electricity position on spherical chitosan, therefore can antimycotic and microorganism.Spherical chitosan is relevant with its molecular weight and functional group for the inhibition of bacterium and Mycophyta.Spherical chitosan can produce bond with aluminosilicate in Phospholipids, has therefore limited the movement of microorganism.The cell that spherical chitosan oligomer can penetrate microorganism suppresses transcribing of RNA.The present invention's spherical chitosan is done to the test of antibiotic property, tested it and whether possess antibiotic property.
Table four and table five are the result of the test containing spherical chitosan cellulose Nonwovens antibacterial functions.This test method is JIS L1902-1998 quantitative technique, and test strain is staphylococcus aureus (ATCC6538P) and pneumobacillus (ATCC4352).Wherein, plant bacteria concentration at 1.0 ± 0.3E
+ 5in (bacterium number/milliliter), represent that experiment is effective, Ma=is undressed, and sample washes away rear bacterium number for 0 hour immediately, bacterium number after cultivation in sample 18-24 hour that Mb=is undressed, and Mc=processing sample is cultivated rear bacterium number for 18-24 hour; Bacterium growth activity value=logMb-logMa, bacterium growth activity value >1.5 represents experiment effectively, antibacterial value=logMb-logMc, sterilizing value=logMa-logMc; The antibacterial standard of evaluating consultation (JAFET) according to the new function of Japanese fibre, antibacterial value is greater than 2.2 expression test sample books fungistatic effect, and sterilizing value is greater than 0 expression test sample book bactericidal effect; 1.3E+4 represent 13000, the rest may be inferred.
From table four and table five, via the present invention prepared containing spherical chitosan cellulose Nonwovens, itself has possessed quite good fungistatic effect and bactericidal effect for staphylococcus aureus and pneumobacillus.
The antibacterial tests result of each sample is as shown in table four and table five
Table four is containing the antibacterial functions test of spherical chitosan cellulose Nonwovens
This test method is JIS L1902-1998 quantitative technique, and test strain is staphylococcus aureus (ATCC6538P)
Table five is containing the antibacterial functions test of spherical chitosan cellulose Nonwovens
This test method is JIS L1902-1998 quantitative technique, and test strain is pneumobacillus (ATCC4352)
Embodiment five (assessment of deodorization functions):
It is the foundation of deodorizing that this deodorizing effect assesses to inhale ammonia test, its method illustrates as follows: with airtight bottle, pack certain density ammonia into, quantitative put into bottle absorption 15 minutes containing chitin fiber element Nonwovens, with gas chromatograph (GC), record the gas concentration before and after putting into containing the cellulose Nonwovens of chitin again, now deodorization is
The suction ammonia rate result of the test of each sample as shown in Table 6
Table six is containing the deodorization functions test of spherical chitosan cellulose Nonwovens
Embodiment six (mildew-resistant, antibacterial and deodorization functions assessment):
Each sample, with the laundry paks of 5g/L, cleans 45 minutes 10 times in the hot water of 70 ℃, and each sample of gained is carried out to mildew-resistant, antibacterial tests and the test of deodorizing rate, and the result of gained is as shown in table seven, table eight and table nine.
Table seven is containing spherical chitosan cellulose Nonwovens mildew-resistant function test after washing 10 times
Table eight is containing the antibacterial functions test after washing 10 times of spherical chitosan cellulose Nonwovens
This test method is JIS L1902-1998 quantitative technique, and test strain is pneumobacillus (ATCC4352)
Table nine is containing the deodorization functions test after washing 10 times of spherical chitosan cellulose Nonwovens
By table three, table four and table five, containing the Nonwovens mildew-resistant of chitin fiber element and antibacterial functions result of the test, shown, of the present inventionly containing nanometer spherical chitosan cellulose Nonwovens, when the content of nanometer spherical chitosan reaches 0.5wt%, can reach above mildew-resistant, antibacterial effect.By the examples prove of table three, table four and table five, the native cellulose Nonwovens containing nanometer spherical chitosan of the present invention can reach the effect of antimildew and antibacterial really.
By table six, containing chitin fiber element Nonwovens deodorization functions result of the test, shown, of the present invention have good suction-operated containing nanometer spherical chitosan native cellulose Nonwovens to ammonia, when the content of nanometer spherical chitosan reaches 0.5wt% when above, to the suction-operated of ammonia, all can reach more than 50%.
By table seven, table eight and table nine are containing the mildew-resistant after washing 10 times of chitin fiber element Nonwovens, antibacterial and deodorization functions result of the test shows, the nanometer spherical chitosan native cellulose Nonwovens that contains of the present invention is after the hot water and detergent treatment of 10 times, the mildew-resistant of Nonwovens and antibacterial functions effect still maintain 90% left and right before original not washing, result shows that of the present invention is one to have the mildew-resistant of long-acting type containing nanometer spherical chitosan native cellulose Nonwovens thus, the cellulose Nonwovens of antibacterial and deodorizing, its effect far surpasses the Nonwovens of generally peddling on the market with surface treatment or interpolation antiseptic.
Claims (9)
1. with wet type, melt and spray there is mildew-resistant, a method for making for antibacterial and deodorization functions cellulose Nonwovens, it is characterized in that: step comprises:
A. take wood pulp as raw material, select alpha-cellulose content at the wood pulp cellulose of more than 85% long and short fiber, its cellulosic degree of polymerization is between 500-1200;
B. add methyl morpholine oxide solvent in wood pulp, and dissolve the slurries that are deployed into wood pulp and methyl morpholine oxide;
C. the natural spherical chitosan macromolecule through functionalized modification and nanometer is added in the slurries that above-mentioned wood pulp and methyl morpholine oxide be deployed into, and make it be mixed to form mutually mucus; It is to utilize horizontal paste mixer, after inserting by this wood pulp cellulose, methyl morpholine oxide solvent and together with the natural spherical chitosan of functionalized modification and nanometer, with 60-80 ℃ of low temperature, carry out high-speed stirred, recycling Vacuum film evaporation device is with 80-120 ℃ of heating, in 5 minutes, the mixed moisture content of evaporation dissolving is got rid of to 5-13%, can form mucus; The content of cellulose of this mucus is 6wt%-8.1wt%, and this mucus viscosity is 840-3000, and this mucus printing opacity index is 1.481-1.495, and this mucus melt index is 740-1000;
D. to melt and spray mode, mucus is formed to cellulose tow from spinning a mouthful ejection; And
E. spray water smoke and make this cellulose tow solidify regeneration, more sequentially through washing, liquid drugs injection rolls, dry and batch program, make continuous long fiber silk kenel and there is the native cellulose Nonwovens of mildew-resistant, antibacterial and deodorization functions.
2. method for making according to claim 1, is characterized in that: in this step c, natural spherical chitosan is that to discard shrimp and crab shells be raw material, makes its separation and purification after peracid, alkali treatment, and the degree of deacetylation of its obtained spherical chitosan is between 50%-99%.
3. method for making according to claim 1, is characterized in that: in this step b, the concentration of methyl morpholine oxide solvent is 50%-75%.
4. method for making according to claim 1, is characterized in that: in step e, this native cellulose Nonwovens is to be continuous filament, and the fibre number of this native cellulose fibre Nonwovens is 1-15um, and the basic weight of this native cellulose Nonwovens is 10g/m
2-300g/m
2.
5. method for making according to claim 1, is characterized in that: in step c, the molecular weight of this spherical chitosan is 10000-520000.
6. method for making according to claim 1, is characterized in that: in step c, to account for the content of cellulose fibre be 0.1wt%-7.0wt% to this spherical chitosan.
7. method for making according to claim 1, is characterized in that: in step e, the coiling speed of this continuous long fiber silk kenel native cellulose Nonwovens is 2-200 meter per minute.
8. method for making according to claim 2, is characterized in that: this acid, alkali treatment acid used are hydrochloric acid or sulfuric acid.
9. method for making according to claim 2, is characterized in that: this acid, alkali treatment alkali used are NaOH or potassium hydroxide.
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| JP6807960B2 (en) * | 2017-01-30 | 2021-01-06 | 帝人フロンティア株式会社 | A method for producing non-crimped short fibers and a wet non-woven fabric containing the obtained non-crimped short fibers. |
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| CN1600928A (en) * | 2004-10-26 | 2005-03-30 | 黄恒燊 | Non-woven fabrics of chitin, preparation method and usage |
| TW200928022A (en) * | 2007-12-31 | 2009-07-01 | Acelon Chem & Fiber Corp | Manufacturing method for natural cellulose fiber with increased mildew-proof, antibacterial and deodorizing functions |
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| US4107374A (en) * | 1974-09-13 | 1978-08-15 | Asahi Kasei Kogyo Kabushiki Kaisha | Non-woven fabric usable as a substratum sheet for artificial leather |
| US6207601B1 (en) * | 1996-03-08 | 2001-03-27 | Rhodia Acetow Ag | Melt-blown nonwoven fabric, process for producing same and the uses thereof |
| CN1195050A (en) * | 1998-04-24 | 1998-10-07 | 聚隆纤维股份有限公司 | Producing process capable of lowering decline of cellulose mucus colour and lustre, and polymerization degree |
| CN1600928A (en) * | 2004-10-26 | 2005-03-30 | 黄恒燊 | Non-woven fabrics of chitin, preparation method and usage |
| TW200928022A (en) * | 2007-12-31 | 2009-07-01 | Acelon Chem & Fiber Corp | Manufacturing method for natural cellulose fiber with increased mildew-proof, antibacterial and deodorizing functions |
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| CN102127841A (en) | 2011-07-20 |
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