CN102850459B - Method for producing cellulose membrane by cotton-wood-bamboo composite pulp - Google Patents
Method for producing cellulose membrane by cotton-wood-bamboo composite pulp Download PDFInfo
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- CN102850459B CN102850459B CN201210357502.0A CN201210357502A CN102850459B CN 102850459 B CN102850459 B CN 102850459B CN 201210357502 A CN201210357502 A CN 201210357502A CN 102850459 B CN102850459 B CN 102850459B
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- 229920002678 cellulose Polymers 0.000 title claims abstract description 109
- 239000001913 cellulose Substances 0.000 title claims abstract description 109
- 239000011425 bamboo Substances 0.000 title claims abstract description 64
- 239000012528 membrane Substances 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000002131 composite material Substances 0.000 title abstract description 8
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 61
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 61
- 241001330002 Bambuseae Species 0.000 claims abstract description 61
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 61
- 229920000297 Rayon Polymers 0.000 claims abstract description 46
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 26
- 239000003513 alkali Substances 0.000 claims abstract description 24
- 230000032683 aging Effects 0.000 claims abstract description 8
- 229920000742 Cotton Polymers 0.000 claims description 48
- 239000002023 wood Substances 0.000 claims description 46
- 150000001875 compounds Chemical class 0.000 claims description 38
- 239000003292 glue Substances 0.000 claims description 33
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 29
- 238000001914 filtration Methods 0.000 claims description 28
- 238000007598 dipping method Methods 0.000 claims description 27
- 238000002360 preparation method Methods 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 14
- 230000035800 maturation Effects 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 12
- 229920000609 methyl cellulose Polymers 0.000 claims description 12
- 239000001923 methylcellulose Substances 0.000 claims description 12
- 238000004061 bleaching Methods 0.000 claims description 10
- 238000013016 damping Methods 0.000 claims description 10
- 238000006477 desulfuration reaction Methods 0.000 claims description 10
- 230000023556 desulfurization Effects 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- 238000004090 dissolution Methods 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 230000008961 swelling Effects 0.000 claims description 7
- 239000002585 base Substances 0.000 claims description 6
- 230000009257 reactivity Effects 0.000 claims description 6
- 238000003483 aging Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000002791 soaking Methods 0.000 abstract description 3
- 238000004220 aggregation Methods 0.000 abstract 1
- 230000002776 aggregation Effects 0.000 abstract 1
- 238000004383 yellowing Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 7
- 206010009866 Cold sweat Diseases 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 229920002488 Hemicellulose Polymers 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- MEIRRNXMZYDVDW-MQQKCMAXSA-N (2E,4E)-2,4-hexadien-1-ol Chemical compound C\C=C\C=C\CO MEIRRNXMZYDVDW-MQQKCMAXSA-N 0.000 description 1
- PMJHHCWVYXUKFD-SNAWJCMRSA-N (E)-1,3-pentadiene Chemical group C\C=C\C=C PMJHHCWVYXUKFD-SNAWJCMRSA-N 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 241000218978 Populus deltoides Species 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 230000003385 bacteriostatic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011086 glassine Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- PMJHHCWVYXUKFD-UHFFFAOYSA-N piperylene Natural products CC=CC=C PMJHHCWVYXUKFD-UHFFFAOYSA-N 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Abstract
The invention relates to a method for producing a cellulose membrane by cotton-wood-bamboo composite pulp, belonging to the technical field of cellulose membrane production by composite bamboo pulp. According to the production method, cotton-wood-bamboo composite pulp is used to prepare viscose for producing the cellulose membrane, and the steps of alkali soaking, ageing, yellowing and dissolving in the process of producing viscose are optimized, so that the soaking effect of the composite pulp is better, the generated alkali cellulose is uniform, thereby avoiding the problems that cellulose sulfonate is low in viscosity and poor in filterability, and the generated products are low in strength, poor in elongation, and easy to become sticky and crisp, wherein the problems are resulted from excessive drop aggregation, so that the finished products can obtain better strength, and the occurrence of sticky and crisp conditions of the cellulose membrane can be greatly reduced.
Description
Technical field
The present invention relates to a kind of production method of cellulose membrane, more particularly, the present invention relates to the production method of a kind of cotton, wood, bamboo compound pulp cellulose membrane, belong to composite bamboo pulp production of cellulose membrane technique field.
Background technology
Glassine paper is in the market all using cotton pulp, wood pulp as raw material, the film made from viscose process.The former is subject to the impact that reduce in arable land, grain and cotton is striven the problems such as ground, output of cotton minimizing, will be more and more nervous; The latter is subject to the impact of wood protection, environmental protection pressure, and application also can more and more be restricted.Therefore, fibre resources deficiency has become a large bottleneck problem of industry future development.Therefore, find a kind of fast-growing, living environment is required lower, especially in mountain area, hills is all plantable, is not the best approach of the current resource scarcity situation of reply with the resource in grain, cotton contention soil.
Utilized renewable resources to develop multiple fiber both at home and abroad, what wherein technology was the most ripe, consumption is maximum is regenerated cellulose fibre, and wherein the most representative is bamboo fibers.Bamboo fibers is a kind of cellulosic fibre extracting from the bamboo of self-sow, bamboo is by 40%～50% Mierocrystalline cellulose, 30% piperylene and 20%～25% lignin composition, wherein topmost part is Mierocrystalline cellulose, can be purified or be regenerated by the processing to bamboo to make corresponding fiber.Because China's bamboo resource is abundant, growing environment is required to the felling of just can growing into forest of low, short, general 3～5 years of its cycle of becoming a useful person, and output is higher, there is the features such as continuous utilization of once planting, make bamboo have good development prospect as a kind of biomass resource.Therefore adopting bamboo wood to carry out cellulosic production is the good method of one that solves shortage of resources.
But the existing method for viscose production that adopts cotton, wood, bamboo laminating production cellulose membrane exists sheet steeping effect bad, the soda cellulose generating is inhomogeneous, and fall too much poly-, can cause the cellulose sulfonate viscosity of generation low, it is poor to filter, the assembled watch generating is now powerful low, extends rate variance, the problem of the embrittlement that is simultaneously easy to be clamminess.
Summary of the invention
It is bad that the present invention is intended to solve the dipping effect of the compound pulp that the production method of the existing viscose glue for the production of cellulose membrane exists, the soda cellulose generating is inhomogeneous, and fall too much poly-, can cause the cellulose sulfonate viscosity of generation low, it is poor to filter, the assembled watch generating is now powerful low, extend rate variance, the problem of embrittlement is easy to be clamminess simultaneously, the production method of a kind of cotton, wood, bamboo compound pulp cellulose membrane is provided, and the finished product that makes to make can obtain good brute force and can significantly reduce the cellulose membrane embrittlement that is clamminess.
In order to realize foregoing invention object, its concrete technical scheme is as follows:
A production method for cotton, wood, bamboo compound pulp cellulose membrane, comprises that viscose glue preparation, cellulose membrane preparation, desulfurization, bleaching, plasticizing and dry damping make cellulose membrane, is characterized in that: described viscose glue preparation comprises following processing step:
A, alkali steeping
Select cotton, wood, bamboo compound pulp as raw material, carry out alkali steeping processing, the concentration of dipping alkali is 260～280g/L, and dipping temperature control is 42～44 DEG C, and dipping time is 75～85 minutes, obtains cellulose sulfonate;
B, experienced
The cellulose sulfonate that steps A is obtained carries out experienced processing, and experienced temperature control is 40～43 DEG C, and ageing time is 90～100 minutes;
C, yellow
The cellulose sulfonate of the experienced processing of process that step B is obtained carries out yellow processing, wherein CS
2add-on be methylcellulose 35～37%;
D, dissolving
The cellulose sulfonate through yellow processing that step C is obtained carries out dissolution process, is specially at 8～12 DEG C and adds de-mineralized water fully to dissolve, then obtain viscose glue by the grinding of common process;
E, deaeration, maturation, filtration
The viscose glue that step D is obtained carries out conventional deaeration, maturation processing, carry out filtration treatment according to common process again, it is 8.9～9.2%(weight percent that control product index obtains ɑ content of cellulose), sodium hydrate content 5.5～6 %(weight percents), viscosity 45～55 seconds, the viscose for the preparation of cellulose membrane of degree of ripeness (ammonia value) 4.5～5.5ml.
In steps A, described cotton, wood, bamboo compound pulp can be to buy on market, also can be according to the preparation of existing this area common process, and the compositely proportional of Qi Zhongmian, wood, bamboo can be arbitrary proportion.
In above-mentioned cotton, wood, bamboo compound pulp, the compositely proportional of three kinds of pulps is preferably:
Bamboo: cotton: wood=55～75:15～20:10～25.It adopts common process to make compound pulp.
In steps A, the index of described cotton, wood, bamboo compound pulp can be any index of compound pulp standard on market, and its preferred index is: viscosity is 10～12mpa.s, methylcellulose content for>=93%, ash oontent for≤0.08%, irony content for≤14ppm, inhale that base number is 530～600%, swelling capacity is 170～210%, is quantitatively 770～830 g/m
2, moisture is 10～11.5%, whiteness for>=83%, reactivity worth is 0～250s(9mlCS
2).
In step D, de-mineralized water can be by replacing after the scrap rubber water thin up after filtering, the index of the viscose glue obtaining after dissolving, grinding is: ɑ content of cellulose is 8.5～8.8%(weight percent), sodium hydrate content is 5～5.5%(weight percent), viscosity 60～70 seconds, degree of ripeness (ammonia value) 6.5～7.5ml.
In step e, preferred: the stainless steel sintered meshwork that the aperture that described filtration adopts is 16～25um.
Cellulose membrane preparation of the present invention adopts existing this area routine techniques means, be specially: the viscose after maturation is filtered is transported to after spray lip, viscose is extruded from spray lip, in precipitation bath, form the cellulose membrane of 800～1400mm, wherein in precipitation bath, sulfuric acid concentration is that 80～100g/L, sodium sulfate concentration are that the temperature of 250～270g/L, precipitation bath is 46～49 DEG C.
In addition, the desulfurization about cellulose membrane of the present invention, bleaching, plasticizing and dry damping are this area routine techniques means, enumerate wherein a kind of process program of routine below:
Desulfurization of the present invention is specially: the cellulose membrane of making is proceeded in desulfurizer, and doctor solution adopts the sodium sulfite solution that concentration is 4～6g/L, and controlling temperature is 80～85 DEG C, and the cellulose membrane after desulfurization is washed.
Bleaching of the present invention is specially: the cellulose membrane after desulfurization is proceeded in Bellmer, and the sodium hypochlorite solution of employing is that concentration is the hydrogen peroxide of 0.4～1.0g/L, and the cellulose membrane after bleaching is washed.
Plasticizing of the present invention is specially: adopt the plastifying liquid of the glycerine of 20～40g/L and the sorbyl alcohol of 10～20g/L to plastify the cellulose membrane after bleaching.
Dry damping of the present invention is specially: the cellulose membrane after plasticizing is entered between dry damping and is dried conditioning, thereby make cellulose membrane finished product, be specially:
Dry damping be mainly realize finished product cellulose membrane by temperature control water ratio 8～10%, in the time just entering drying room, be mainly that cellulose membrane is carried out to preheating, temperature is controlled at 40～80 DEG C, carry out subsequently drying temperature and be controlled at 80～100 DEG C, the processing of lowering the temperature after dry, temperature is controlled at 100～50 DEG C, in the end carries out conditioning, temperature is controlled at 50～30 DEG C, humidity 75 ± 10%.
The useful technique effect that the present invention brings:
1, in the alkali steeping of steps A, dipping alkali concn, dipping temperature and dipping time that the present invention selects cooperatively interact, be conducive to cellulosic swelling, improve dipping effect, ensure that cotton, wood pulps is adding after bamboo pulp, the gamma value of the cellulose sulfonate obtaining through dipping is 50～60%; The crosslinking time of composite bamboo pulp bamboo pulp and sodium hydroxide in minutes just can complete, but pulp progressively reaches uniform degree to fibrous inside infiltration and needs certain hour from soaking alkali lye, the stripping of hemicellulose element needs more times, dipping time is longer, hemicellulose stripping is more abundant, its dissolution rate declines along with the increase of hemicellulose concentration in solution, finally reach running balance, adopt alkali steeping parameter of the present invention can make whole cotton, wood, bamboo compound pulp system reach running balance; And its dipping temperature can make follow-up yellow reaction more even;
2, in step B experienced, in cotton, wood, bamboo compound pulp, its polymerization degree difference separately, soda cellulose falls poly-lessly when experienced in process of production, adopts experienced temperature of the present invention and ageing time control, can obtain the narrower Mierocrystalline cellulose of molecular weight distribution, make in subsequent production process, the viscose riscosity making is higher, has good uniformity, and greatly improves the polymerization degree;
3, in the yellow of step C, the selection of the add-on of dithiocarbonic anhydride can prevent fully yellow of soda cellulose, makes the dissolving of cellulose sulfonate and the filtration procedure of viscose glue more smooth, can not cause milky white fiber simultaneously, has reduced unit consumption and pollution;
4, in cotton of the present invention, wood, bamboo compound pulp, the compositely proportional of three kinds of pulps is: bamboo: cotton: wood=55～75:15～20:10～25, improve the stability of pulp, can not affect the processing parameter of subsequent handling, and can better bring into play the natural antibacterial of bamboo pulp, can better evade again bamboo pulp and be difficult to determining of reaction;
5, dissolved water de-mineralized water of the present invention can, with the solution after the scrap rubber thin up after filtering, so both ensure the dissolving of cellulose sulfonate, has avoided again the exhaust emission environment of scrap rubber;
6, the stainless steel sintered meshwork that the aperture that filtration of the present invention preferably adopts is 16～25um, has been controlled at a best filtration area, can reduce the loss of viscose glue, reduces cost, and is beneficial to environmental protection;
7, the optimization of processing method of the present invention and processing parameter is an indivisible and independent entirety, the optimization of each processing parameter cooperatively interacts, make the dipping effect of compound pulp better, the soda cellulose generating is even, avoid falling too much poly-, can cause the cellulose sulfonate viscosity of generation low, it is poor to filter, the assembled watch generating is now powerful low, extend rate variance, simultaneously be easy to the to be clamminess problem of embrittlement, the finished product that makes to make can obtain good brute force and can significantly reduce the be clamminess generation of embrittlement situation of cellulose membrane;
8, the present invention adopts the composite bamboo pulp of making as raw material taking cotton, wood, bamboo to carry out the production of cellulose membrane, the performance of its cellulose membrane that is raw material production than independent employing Populus deltoides is more superior, show as the strength and elongation variation coefficient little, elongation is large, toughness is better, owing to being present in bamboo cellulose, the cellulose membrane that therefore adopts this method to produce also has natural antibacterial bacteriostatic performance, has improved the Application Areas of this product simultaneously.
Embodiment
embodiment 1
A production method for cotton, wood, bamboo compound pulp cellulose membrane, comprises that viscose glue preparation, cellulose membrane preparation, desulfurization, bleaching, plasticizing and dry damping make cellulose membrane, and described viscose glue preparation comprises following processing step:
A, alkali steeping
Select cotton, wood, bamboo compound pulp as raw material, carry out alkali steeping processing, the concentration of dipping alkali is 260g/L, and dipping temperature control is 42 DEG C, and dipping time is 75 minutes, obtains cellulose sulfonate;
B, experienced
The cellulose sulfonate that steps A is obtained carries out experienced processing, and experienced temperature control is 40 DEG C, and ageing time is 90 minutes;
C, yellow
The cellulose sulfonate of the experienced processing of process that step B is obtained carries out yellow processing, wherein CS
2add-on be methylcellulose 35%;
D, dissolving
The cellulose sulfonate through yellow processing that step C is obtained carries out dissolution process, is specially at 8 DEG C and adds de-mineralized water fully to dissolve, then obtain viscose glue by grinding;
E, deaeration, maturation, filtration
The viscose glue that step D is obtained carries out deaeration, maturation processing, then carries out filtration treatment, and obtaining ɑ content of cellulose is 8.9%, sodium hydrate content 5.5%, viscosity 45 seconds, the viscose for the preparation of cellulose membrane of degree of ripeness 4.5ml.
embodiment 2
A production method for cotton, wood, bamboo compound pulp cellulose membrane, comprises that viscose glue preparation, cellulose membrane preparation, desulfurization, bleaching, plasticizing and dry damping make cellulose membrane, and described viscose glue preparation comprises following processing step:
A, alkali steeping
Select cotton, wood, bamboo compound pulp as raw material, carry out alkali steeping processing, the concentration of dipping alkali is 280g/L, and dipping temperature control is 44 DEG C, and dipping time is 85 minutes, obtains cellulose sulfonate;
B, experienced
The cellulose sulfonate that steps A is obtained carries out experienced processing, and experienced temperature control is 43 DEG C, and ageing time is 100 minutes;
C, yellow
The cellulose sulfonate of the experienced processing of process that step B is obtained carries out yellow processing, wherein CS
2add-on be methylcellulose 37%;
D, dissolving
The cellulose sulfonate through yellow processing that step C is obtained carries out dissolution process, is specially at 12 DEG C and adds de-mineralized water fully to dissolve, then obtain viscose glue by grinding;
E, deaeration, maturation, filtration
The viscose glue that step D is obtained carries out deaeration, maturation processing, then carries out filtration treatment, and obtaining ɑ content of cellulose is 9.2%, sodium hydrate content 6%, viscosity 55 seconds, the viscose for the preparation of cellulose membrane of degree of ripeness 5ml.
embodiment 3
A production method for cotton, wood, bamboo compound pulp cellulose membrane, comprises that viscose glue preparation, cellulose membrane preparation, desulfurization, bleaching, plasticizing and dry damping make cellulose membrane, and described viscose glue preparation comprises following processing step:
A, alkali steeping
Select cotton, wood, bamboo compound pulp as raw material, carry out alkali steeping processing, the concentration of dipping alkali is 270g/L, and dipping temperature control is 43 DEG C, and dipping time is 80 minutes, obtains cellulose sulfonate;
B, experienced
The cellulose sulfonate that steps A is obtained carries out experienced processing, and experienced temperature control is 41.5 DEG C, and ageing time is 95 minutes;
C, yellow
The cellulose sulfonate of the experienced processing of process that step B is obtained carries out yellow processing, wherein CS
2add-on be methylcellulose 36%;
D, dissolving
The cellulose sulfonate through yellow processing that step C is obtained carries out dissolution process, is specially at 10 DEG C and adds de-mineralized water fully to dissolve, then obtain viscose glue by grinding;
E, deaeration, maturation, filtration
The viscose glue that step D is obtained carries out deaeration, maturation processing, then carries out filtration treatment, and obtaining ɑ content of cellulose is 9.05%, sodium hydrate content 5.75%, viscosity 50 seconds, the viscose for the preparation of cellulose membrane of degree of ripeness 5ml.
embodiment 4
A production method for cotton, wood, bamboo compound pulp cellulose membrane, comprises that viscose glue preparation, cellulose membrane preparation, desulfurization, bleaching, plasticizing and dry damping make cellulose membrane, and described viscose glue preparation comprises following processing step:
A, alkali steeping
Select cotton, wood, bamboo compound pulp as raw material, carry out alkali steeping processing, the concentration of dipping alkali is 262g/L, and dipping temperature control is 43.6 DEG C, and dipping time is 79 minutes, obtains cellulose sulfonate;
B, experienced
The cellulose sulfonate that steps A is obtained carries out experienced processing, and experienced temperature control is 42 DEG C, and ageing time is 97 minutes;
C, yellow
The cellulose sulfonate of the experienced processing of process that step B is obtained carries out yellow processing, wherein CS
2add-on be methylcellulose 35.2%;
D, dissolving
The cellulose sulfonate through yellow processing that step C is obtained carries out dissolution process, is specially at 9 DEG C and adds de-mineralized water fully to dissolve, then obtain viscose glue by grinding;
E, deaeration, maturation, filtration
The viscose glue that step D is obtained carries out deaeration, maturation processing, then carries out filtration treatment, and obtaining ɑ content of cellulose is 9.12%, sodium hydrate content 5.9%, viscosity 53 seconds, the viscose for the preparation of cellulose membrane of degree of ripeness 5.4ml.
embodiment 5
On the basis of embodiment 1～4, preferred:
In described cotton, wood, bamboo compound pulp, the compositely proportional of three kinds of pulps is: bamboo: cotton: wood=55:15:10.
In steps A, the index of described cotton, wood, bamboo compound pulp is: viscosity is that 10mpa.s, methylcellulose content are 93%, ash oontent is 0.01%, irony content is 8ppm, inhale that base number is 530%, swelling capacity is 170%, is quantitatively 770g/m
2, moisture is 10%, whiteness is 83%, reactivity worth is at 9mlCS
2condition under be 0s.
In step D, de-mineralized water replaces after by the scrap rubber water thin up after filtering.
In step D, the index of described dissolving, the viscose glue that obtains after grinding is: ɑ content of cellulose is 8.5%, and sodium hydrate content is 5%, viscosity 60 seconds, degree of ripeness 6.5ml.
In step e, the stainless steel sintered meshwork that the aperture that described filtration adopts is 16um.
embodiment 6
On the basis of embodiment 1～4, preferred:
In described cotton, wood, bamboo compound pulp, the compositely proportional of three kinds of pulps is: bamboo: cotton: wood=75:20:25.
In steps A, the index of described cotton, wood, bamboo compound pulp is: viscosity is that 12mpa.s, methylcellulose content are 98%, ash oontent is 0.08%, irony content is 14ppm, inhale that base number is 600%, swelling capacity is 210%, is quantitatively 830 g/m
2, moisture is 11.5%, whiteness is 95%, reactivity worth is at 9mlCS
2condition under be 250s.
In step D, de-mineralized water replaces after by the scrap rubber water thin up after filtering.
In step D, the index of described dissolving, the viscose glue that obtains after grinding is: ɑ content of cellulose is 8.8%, and sodium hydrate content is 5.5%, viscosity 70 seconds, degree of ripeness 7.5ml.
In step e, the stainless steel sintered meshwork that the aperture that described filtration adopts is 25um.
embodiment 7
On the basis of embodiment 1～4, preferred:
In described cotton, wood, bamboo compound pulp, the compositely proportional of three kinds of pulps is: bamboo: cotton: wood=65:17.5:17.5.
In steps A, the index of described cotton, wood, bamboo compound pulp is: viscosity is that 11mpa.s, methylcellulose content are 95.5%, ash oontent is 0.045%, irony content is 11ppm, inhale that base number is 565%, swelling capacity is 190%, is quantitatively 800g/m
2, moisture is 10.75%, whiteness is 89%, reactivity worth is at 9mlCS
2condition under be 125s.
In step D, de-mineralized water replaces after by the scrap rubber water thin up after filtering.
In step D, the index of described dissolving, the viscose glue that obtains after grinding is: ɑ content of cellulose is 8.65%, and sodium hydrate content is 5.25%, viscosity 65 seconds, degree of ripeness 7ml.
In step e, the stainless steel sintered meshwork that the aperture that described filtration adopts is 20um.
embodiment 8
On the basis of embodiment 1～4, preferred:
In described cotton, wood, bamboo compound pulp, the compositely proportional of three kinds of pulps is: bamboo: cotton: wood=58:17:21.
In steps A, the index of described cotton, wood, bamboo compound pulp is: viscosity is that 10.8mpa.s, methylcellulose content are 97%, ash oontent is 0.055%, irony content is 12ppm, inhale that base number is 571%, swelling capacity is 174%, quantitatively for 789g/m2, moisture are 11%, whiteness is 90%, reactivity worth is 50s under the condition of 9mlCS2.
In step D, de-mineralized water replaces after by the scrap rubber water thin up after filtering.
In step D, the index of described dissolving, the viscose glue that obtains after grinding is: ɑ content of cellulose is 8.7%, and sodium hydrate content is 5.1%, viscosity 69 seconds, degree of ripeness 7.25ml.
In step e, the stainless steel sintered meshwork that the aperture that described filtration adopts is 19um.
Claims (4)
1. a production method for cotton, wood, bamboo compound pulp cellulose membrane, comprises that viscose glue preparation, cellulose membrane preparation, desulfurization, bleaching, plasticizing and dry damping make cellulose membrane, is characterized in that: described viscose glue preparation comprises following processing step:
A, alkali steeping
Select cotton, wood, bamboo compound pulp as raw material, carry out alkali steeping processing, the concentration of dipping alkali is 260～280g/L, and dipping temperature control is 42～44 DEG C, and dipping time is 75～85 minutes, obtains cellulose sulfonate; In described cotton, wood, bamboo compound pulp, the compositely proportional of three kinds of pulps is: bamboo: cotton: wood=55～75:15～20:10～25; The index of described cotton, wood, bamboo compound pulp is: viscosity is 10～12mpa.s, methylcellulose content for>=93%, ash oontent for≤0.08%, irony content for≤14ppm, inhale that base number is 530～600%, swelling capacity is 170～210%, is quantitatively 770～830 g/m
2, moisture is 10～11.5%, whiteness for>=83%, reactivity worth is at 9mlCS
2condition under be 0～250s;
B, experienced
The cellulose sulfonate that steps A is obtained carries out experienced processing, and experienced temperature control is 40～43 DEG C, and ageing time is 90～100 minutes;
C, yellow
The cellulose sulfonate of the experienced processing of process that step B is obtained carries out yellow processing, wherein CS
2add-on be methylcellulose 35～37%;
D, dissolving
The cellulose sulfonate through yellow processing that step C is obtained carries out dissolution process, is specially at 8～12 DEG C and adds de-mineralized water fully to dissolve, then obtain viscose glue by grinding;
E, deaeration, maturation, filtration
The viscose glue that step D is obtained carries out deaeration, maturation processing, then carries out filtration treatment, and obtaining ɑ content of cellulose is 8.9～9.2%, sodium hydrate content 5.5～6%, viscosity 45～55 seconds, the viscose for the preparation of cellulose membrane of degree of ripeness 4.5～5.5ml.
2. the production method of a kind of cotton according to claim 1, wood, bamboo compound pulp cellulose membrane, is characterized in that: in step D, de-mineralized water replaces after by the scrap rubber water thin up after filtering.
3. the production method of a kind of cotton according to claim 1, wood, bamboo compound pulp cellulose membrane, it is characterized in that: in step D, the index of described dissolving, the viscose glue that obtains after grinding is: ɑ content of cellulose is 8.5～8.8%, sodium hydrate content is 5～5.5%, viscosity 60～70 seconds, degree of ripeness 6.5～7.5ml.
4. the production method of a kind of cotton according to claim 1, wood, bamboo compound pulp cellulose membrane, is characterized in that: in step e, and the stainless steel sintered meshwork that the aperture that described filtration adopts is 16～25um.
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| CN101649059B (en) * | 2009-07-13 | 2011-11-30 | 潍坊恒联玻璃纸有限公司 | Preparing method of antibacterial cellulose membrane |
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| CN101649059B (en) * | 2009-07-13 | 2011-11-30 | 潍坊恒联玻璃纸有限公司 | Preparing method of antibacterial cellulose membrane |
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