Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of regenerated celulose fibre and preparation method thereof, the regenerated celulose fibre that theres is provided of the present invention and preparation method, take corncob as cellulose be raw material, regenerated celulose fibre is prepared through solvent method, effectively solve regenerated celulose fibre raw material in short supply, and the problem of poor operability in preparation process.
The invention provides a kind of preparation method of regenerated celulose fibre, it is characterized in that, comprise the steps:
1) corn cob fiber pulp and chelating agent after mixed dissolution, are obtained spinning solution in NMMO solution;
2) spinning solution above-mentioned steps obtained again carries out spinning, obtains regenerated celulose fibre.
Preferably, the degree of polymerization of described corn cob fiber pulp is 400 ~ 800.
Preferably, in described corn cob fiber pulp, first fibre is 80% ~ 95%, and whiteness is 70% ~ 90%, and ash content is 0 ~ 0.5%, and moisture is 5% ~ 50%.
Preferably, the quality of described corn cob fiber pulp accounts for 5% ~ 20% of spinning solution gross mass; The quality of described chelating agent is 0.1% ~ 0.5% of described corn cob fiber pulp quality.
Preferably, described chelating agent is one or more in carboxylic acids chelating agent, polycarboxylic acid chelating agent and organic multicomponent phosphonic acid type chelants;
Preferably, described carboxylic acids chelating agent is one or more of amino carboxylic acid quasi-chelate compound, hydroxycarboxylic acid quasi-chelate compound and hydroxylamino carboxylic acids chelating agent;
Described amino carboxylic acid quasi-chelate compound comprises one or more in ethylenediamine tetra-acetic acid (EDTA), diethyl pentetic acid (DTPA) and diethylene-triamine pentaacetic acid and salt thereof; Described hydroxylamino carboxylic acids chelating agent comprises one or more in hydroxyethylethylene diamine tri-acetic acid (HEDTA) and bicine N-(DEG); Described hydroxycarboxylic acid quasi-chelate compound comprises one or more in citric acid (CA), tartaric acid (TA) and gluconic acid (GA);
Described polycarboxylic acid chelating agent is one or more in polyacrylic acid and sodium salt thereof, polymethylacrylic acid, hydrolytic polymaleic anhydride, fumaric acid (fumaric acid)-propene sulfonic acid copolymer.
Preferably, described corn cob fiber pulp is through peracid treatment.
Preferably, described acid treatment is that described corn cob fiber pulp and the front acid solution of NMMO solution mixing process;
Or in described corn cob fiber pulp and NMMO solution mixed dissolution process, pass into sour gas and process.
The invention provides a kind of regenerated celulose fibre, it is characterized in that, obtained after preparation as fibrous raw material by corn cob fiber.
Present invention also offers a kind of article, it is characterized in that, containing regenerated celulose fibre prepared by the preparation method described in claim 1 ~ 7 any one, or the regenerated celulose fibre described in claim 8 ~ 9 any one;
Described article comprise civilian clothes, home-textile, ultraviolet protection fabric or industrial special protecting clothing.
The invention provides a kind of preparation method of regenerated celulose fibre, it is characterized in that, comprise the steps, first corn cob fiber pulp and chelating agent after mixed dissolution, are obtained spinning solution in NMMO solution; Spinning solution above-mentioned steps obtained again carries out spinning, obtains regenerated celulose fibre.Compared with prior art, the present invention adopts solvent method to prepare regenerated celulose fibre, take corn cob fiber as the raw material of Lyocell fiber, make use of agricultural wastes corncob fully, not only effectively solve the yoke of Lyocell fiber shortage of raw materials, also for the comprehensive utilization of corncob provides brand-new approach; And corn cob fiber element pulp, fibre length short (length is between 0 ~ 0.3mm), the degree of polymerization evenly (between 500 ~ 600), in dicyandiamide solution can rapid dispersion even, and pulp surface distributed has a large amount of holes, there is stronger capillarity, can lyosoption fast, pulp surface is made all to participate in reacting with inside, greatly reduce the reaction time, improve the reaction uniformity, do not need the activation procedure through pulp, shorten production procedure, improve production efficiency.In addition, the present invention in the process preparing spinning solution, by add chelating agent, iron ion in corncob pulp was lost efficacy, thus avoid iron ion the spinning solution degree of polymerization is acutely declined, cause difficulty in spinning, easily break end, make into the negative effects such as a poor product quality, intensity is low.Experimental result shows, regenerated celulose fibre preparation method provided by the invention be uniformly dissolved stable, dissolution time is short, preparation method's dissolution time provided by the invention is 30 ~ 60min, compare wood pulp and shorten 20 ~ 70min, follow-up ropiness can be good, prepared regenerated celulose fibre elongation at break can reach 17.6%, and dry fracture strength can reach 4.5CN/dtex.
Detailed description of the invention
In order to understand the present invention further, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these describe just in order to further illustrate the features and advantages of the present invention, instead of the restriction to invention claim.
The all raw materials of the present invention, be not particularly limited its source, commercially buy or prepare according to conventional method well known to those skilled in the art.
The all raw materials of the present invention, are not particularly limited its purity, and the present invention preferably adopts analysis pure.
The invention provides a kind of preparation method of regenerated celulose fibre, it is characterized in that, comprise the steps:
1) corn cob fiber pulp and chelating agent after mixed dissolution, are obtained spinning solution in NMMO solution;
2) spinning solution above-mentioned steps obtained again carries out spinning, obtains regenerated celulose fibre.
First corn cob fiber pulp and chelating agent after mixed dissolution, are obtained spinning solution by the present invention in NMMO solution; The degree of polymerization of described corn cob fiber pulp is preferably 400 ~ 800, is more preferably 400 ~ 750, is more preferably 400 ~ 700, be more preferably 400 ~ 650, and optimum is 400 ~ 600.In described corn cob fiber pulp, described first fibre is preferably 80% ~ 95%, is more preferably 83% ~ 92%, most preferably is 85% ~ 90%; Described whiteness is preferably 70% ~ 90%, is more preferably 75% ~ 85%, most preferably is 78% ~ 82%; Described ash content is preferably 0 ~ 0.5%, is more preferably 0.1% ~ 0.4%, most preferably is 0.2% ~ 0.3%.The present invention is not particularly limited described corncob, with corncob well known to those skilled in the art; The present invention's other conditions to described corn cob fiber pulp are not particularly limited, with the condition of corn cob fiber pulp well known to those skilled in the art; The present invention is not particularly limited described corn cob fiber pulp source, and with preparation method's preparation or commercially available well known to those skilled in the art, the present invention preferably can adopt following methods to be prepared,
Method one
(1) after corncob being pulverized, under the catalytic action of hydrogen peroxide, the organic acid solution be made up of formic acid and acetic acid is used to carry out boiling to corncob, control boiling temperature 120-155 DEG C, solid-liquid mass ratio is 1:5-1:15, reaction time 10-60min, and the reactant liquor obtained is carried out first time Separation of Solid and Liquid; In described organic acid solution, total acid is dense is 70-95wt%, and the mass ratio of described acetic acid and formic acid is 1:1-1:19, and surplus is water; Hydrogen peroxide accounts for the 1-8wt% of corncob;
(2) described first time solid of obtaining of Separation of Solid and Liquid is collected, under the catalytic action of hydrogen peroxide, the mix acid liquor be made up of formic acid, acetic acid is used to carry out pickling to described solid, control pickling temperature 30-100 DEG C, solid-liquid mass ratio is 1:4-1:20, and the reactant liquor obtained is carried out second time Separation of Solid and Liquid; In described mix acid liquor, total acid is dense is 70-95wt%, and the mass ratio of described acetic acid and formic acid is 1:1-1:19, and surplus is water; Hydrogen peroxide accounts for the 1-8wt% of corncob;
(3) collect the solid that described second time Separation of Solid and Liquid obtains, and wash, control washing temperature is 25-90 DEG C, and starching dense is 1-10wt%, and the washing slurry obtained is carried out third time Separation of Solid and Liquid;
(4) collect described third time the solid that obtains of Separation of Solid and Liquid and screening obtain required screened stock cellulose, after bleaching, obtain corn cob fiber element pulp.
Method two
By in method one, the pickling of step (2) replaces with alkali cleaning, and actual conditions is 12% sodium hydroxide solution, carries out alkali cleaning, alkali cleaning temperature 30-100 DEG C to the solid of step (1), alkali cleaning time 10-30min.Other conditions are constant.
Method three
By in method one, the digestion process of step (1) replaces with: pulverized by corncob, carry out alkali lye boiling 0.5-1.2 hour, obtain corn cob fiber cellulose solution, then carry out Separation of Solid and Liquid.Other conditions are constant.
See 500 times of SEM photos that Fig. 1, Fig. 1 are corn cob fiber element pulp prepared by the present invention.See 5000 times of SEM photos that Fig. 2, Fig. 2 are corn cob fiber provided by the invention element pulp.
The quality optimization of corn cob fiber pulp of the present invention accounts for 5% ~ 20% of spinning solution gross mass, is more preferably 8% ~ 18%, most preferably is 10% ~ 15%; The quality optimization of described chelating agent is 0.1% ~ 0.5% of described corn cob fiber pulp quality, is more preferably 0.2% ~ 0.4%, most preferably is 0.25% ~ 0.35%; Chelating agent of the present invention is not particularly limited, with the chelating agent for removing iron ion well known to those skilled in the art, the present invention is for improving removal effect, be preferably one or more in carboxylic acids chelating agent, polycarboxylic acid chelating agent and organic multicomponent phosphonic acid type chelants, be more preferably carboxylic acids chelating agent, polycarboxylic acid chelating agent or organic multicomponent phosphonic acid type chelants, most preferably be carboxylic acids chelating agent or polycarboxylic acid chelating agent; Described carboxylic acids chelating agent is preferably one or more of amino carboxylic acid quasi-chelate compound, hydroxycarboxylic acid quasi-chelate compound and hydroxylamino carboxylic acids chelating agent, is more preferably amino carboxylic acid quasi-chelate compound, hydroxycarboxylic acid quasi-chelate compound or hydroxylamino carboxylic acids chelating agent; Described polycarboxylic acid chelating agent is preferably one or more in polyacrylic acid and sodium salt thereof, polymethylacrylic acid, hydrolytic polymaleic anhydride, fumaric acid (fumaric acid)-propene sulfonic acid copolymer, be more preferably polyacrylic acid and sodium salt, polymethylacrylic acid, hydrolytic polymaleic anhydride or fumaric acid (fumaric acid)-propene sulfonic acid copolymer, most preferably be polyacrylic acid and sodium salt, hydrolytic polymaleic anhydride or fumaric acid (fumaric acid)-propene sulfonic acid copolymer.
In described carboxylic acids chelating agent, described amino carboxylic acid quasi-chelate compound is specifically as follows one or more in ethylenediamine tetra-acetic acid (EDTA), diethyl pentetic acid (DTPA) and diethylene-triamine pentaacetic acid and salt thereof, also can be ethylenediamine tetra-acetic acid (EDTA), diethyl pentetic acid (DTPA) or diethylene-triamine pentaacetic acid and salt thereof; Described hydroxylamino carboxylic acids chelating agent is specifically as follows one or more in hydroxyethylethylene diamine tri-acetic acid (HEDTA) and bicine N-(DEG), also can be hydroxyethylethylene diamine tri-acetic acid (HEDTA) or bicine N-(DEG); Described hydroxycarboxylic acid quasi-chelate compound preferably includes one or more in citric acid (CA), tartaric acid (TA) and gluconic acid (GA), more preferably comprises citric acid (CA), tartaric acid (TA) or gluconic acid (GA).
The source of the present invention to described NMMO solution is not particularly limited, with method preparation or commercially available well known to those skilled in the art, the present invention obtains described NMMO solution after preferably adopting commercially available NMMO solvent (concentration is generally 50% or 60%) to be concentrated into moisture 10% ~ 30%.The present invention's other conditions to described NMMO solution are not particularly limited, with condition well known to those skilled in the art.
The concrete grammar of the present invention to described mixing is not particularly limited, and those skilled in the art can adjust according to actual conditions, product requirement and quality control, and the present invention is preferably Homogeneous phase mixing.The concrete grammar of the present invention to described dissolving is not particularly limited, and those skilled in the art can carry out adjusting and selecting according to actual conditions, product requirement and quality control, and the dissolving of the preferred corn cob fiber pulp of the present invention can three kinds of modes be dissolved below:
Direct dissolution method: commercially available NMMO solvent concentration, adds corncob pulp, then heat up, and carries out dissolving cellulos.
Indirect dissolution method: commercially available NMMO solvent (mostly being 50% or 60%), first mix with corncob pulp, cellulose is swelling in a solvent, then through reducing pressure/vacuumizing removing excess water, dissolving cellulos.
Directly-dissolution method indirectly:
Commercially available NMMO solvent concentration, to moisture 10% ~ 30%, adds corncob pulp, then heats up, simultaneously through reducing pressure/vacuumizing removing excess water, dissolving cellulos.
The present invention improves the effect and the quality of subsequent product of dissolving, preferred sequestrant to add opportunity be the moisture of NMMO solution when being 10% ~ 30%, be more preferably 13% ~ 30%, be more preferably 15% ~ 30%, most preferably be 20% ~ 30%.
The concrete preparation process of the present invention to described spinning solution does not have other to limit especially, with the preparation method of spinning solution well known to those skilled in the art, those skilled in the art can carry out adjusting and selecting according to actual conditions, product requirement and quality control, and the present invention is preferably:
Method one: get the NMMO aqueous solution, being concentrated into moisture is 10-30%, and by corn cob fiber element pulp, chelating agent and the mixing of the NMMO solution after concentrating, stir and heat up, dissolving cellulos, obtains spinning solution.
Method two: get the NMMO aqueous solution, by the mixing of corn cob fiber element pulp, chelating agent and NMMO solution, cellulose is swelling in a solvent, and then through reducing pressure/vacuumizing removing excess water, dissolving cellulos, obtains spinning solution.
Method three: get the NMMO aqueous solution, being concentrated into moisture is 10-30%, and by corn cob fiber element pulp, chelating agent and the mixing of the NMMO solution after concentrating, stir and heat up, simultaneously through reducing pressure/vacuumizing removing excess water, dissolving cellulos, obtains spinning solution.
The spinning solution that above-mentioned steps obtains by the present invention again carries out spinning, obtains regenerated celulose fibre.The detailed process of the present invention to described spinning is not particularly limited, the process of regenerated celulose fibre is prepared with spinning solution spinning well known to those skilled in the art, those skilled in the art can know and know, other filtration, spinning, wash, oil and drying etc. process, all be absolutely necessary conventional steps, and this is also known to those skilled in the art.Be Lyocell fiber spinning technique general flow chart see Fig. 4, Fig. 4.
The overall preparation method of the present invention to described regenerated celulose fibre does not have other to limit especially, with operating condition well known to those skilled in the art, those skilled in the art can carry out adjusting and selecting according to actual conditions, product requirement and quality control, the present invention preferably adopts solvent method to prepare regenerated celulose fibre on the whole, is more preferably specially:
Method one: get the NMMO aqueous solution, being concentrated into moisture is 10-30%, and by corn cob fiber element pulp, chelating agent and the mixing of the NMMO solution after concentrating, stir and heat up, dissolving cellulos, obtains spinning solution.Then spinning solution is carried out filtering, obtaining regenerated celulose fibre through dry-jet wet spinning process, coagulating bath is NMMO dilute aqueous solution (concentration is 5 ~ 15%), and the tow after shaping can obtain corn cob fiber cellulose fiber through washing, cutting off, oil, after the postprocessing working procedures such as dry.
Method two: get the NMMO aqueous solution, by the mixing of corn cob fiber element pulp, chelating agent and NMMO solution, cellulose is swelling in a solvent, and then through reducing pressure/vacuumizing removing excess water, dissolving cellulos, obtains spinning solution.Then spinning solution is carried out filtering, obtaining regenerated celulose fibre through dry-jet wet spinning process, coagulating bath is NMMO dilute aqueous solution (concentration is 5 ~ 15%), and the tow after shaping can obtain corn cob fiber cellulose fiber through washing, cutting off, oil, after the postprocessing working procedures such as dry.
Method three: get the NMMO aqueous solution, being concentrated into moisture is 10-30%, and by corn cob fiber element pulp, chelating agent and the mixing of the NMMO solution after concentrating, stir and heat up, simultaneously through reducing pressure/vacuumizing removing excess water, dissolving cellulos, obtains spinning solution.Then spinning solution is carried out filtering, obtaining regenerated celulose fibre through dry-jet wet spinning process, coagulating bath is NMMO dilute aqueous solution (concentration is 5 ~ 15%), and the tow after shaping can obtain corn cob fiber cellulose fiber through washing, cutting off, oil, after the postprocessing working procedures such as dry.
The present invention improves the effect of overall preparation process and the quality of subsequent product, preferably also acid treatment step is comprised to described corn cob fiber pulp, the present invention is not particularly limited described acid treatment step, with acid treatment step well known to those skilled in the art, the present invention improves the chelate effect of iron ion and chelating agent, concrete steps are more preferably, and described corn cob fiber pulp and the front acid solution of NMMO solution mixing process; Or in described corn cob fiber pulp and NMMO solution mixed dissolution process, pass into sour gas and process.The present invention is not particularly limited the acid source in described acid solution, those skilled in the art can carry out adjusting and selecting according to actual conditions, product requirement and quality control, and the present invention is preferably nonmetal strong acid weak base salt, weak acid (such as formic acid, acetic acid); The mode of the present invention to described acid solution process is not particularly limited, those skilled in the art can carry out adjusting and selecting according to actual conditions, product requirement and quality control, and the present invention is preferably floods and/or drying in an acidic solution by corn cob fiber pulp.The present invention is not particularly limited described sour gas, and those skilled in the art can carry out adjusting and selecting according to actual conditions, product requirement and quality control, and the present invention is preferably carbon dioxide; The present invention is the carbon dioxide that passes into of preferred above-mentioned steps also, removes in the de-bubble step before follow-up spinning simultaneously.
The present invention has prepared regenerated celulose fibre through above-mentioned steps, i.e. the corn cob fiber regenerated celulose fibre of a kind of corn cob fiber element pulp production.The present invention effectively utilizes fibre length short (length is between 0 ~ 0.3mm) in corn cob fiber element pulp, the degree of polymerization evenly (between 500 ~ 600), in dicyandiamide solution can rapid dispersion even, and pulp surface distributed has a large amount of holes, there is stronger capillarity, can lyosoption fast, pulp surface is made all to participate in reacting with inside, greatly reduce the reaction time, improve the reaction uniformity, do not need the activation procedure through pulp, shorten production procedure, improve production efficiency.
In addition, the present invention is aided with the content that chelating agent reduces iron ion in preparation process, effectively overcome iron ion, on the one hand the spinning solution degree of polymerization obtained acutely is declined, cause difficulty in spinning, easily break end, make into the problems such as a poor product quality, intensity are low, the existence of iron ion can cause the decomposition of cellulose and solvent NMMO on the other hand, produce explosive intermediate product, there is the problem of major safety risks.
The invention provides a kind of regenerated celulose fibre, it is characterized in that, obtained after preparation as fibrous raw material by corn cob fiber.
Regenerated celulose fibre provided by the invention is using corn cob fiber as raw material, fruit axle-corncob after the present invention utilizes corn ear to slough seed, effectively solve the bottleneck that Lyocell fiber raw material limits its fast development, the existing annual output corn of China is about 1.5 hundred million tons simultaneously, the output of corresponding corncob is estimated also at about 4,000 ten thousand tons, so a large amount of corncobs, except industrial part is used as the product such as furfural, xylitol, major part goes out of use.Thus, the corncob not only comparatively cheap wide material sources of price that the present invention adopts, can also solve corncob and directly burn process as agricultural wastes, cause the problem such as the wasting of resources and environmental pollution after large-area applications.Compare other raw materials, the regenerated celulose fibre of preparation has better intensity, controls especially to the content of iron ion, effectively overcomes the defect that corn cob fiber exists as raw material.
Present invention also offers a kind of article, it is characterized in that, containing regenerated celulose fibre prepared by the preparation method described in above-mentioned any one technical scheme, or the regenerated celulose fibre described in above-mentioned any one technical scheme;
Described article preferably include civilian clothes, home-textile, ultraviolet protection fabric or industrial special protecting clothing.
The invention provides a kind of regenerated celulose fibre and its preparation method and application, solvent method is adopted to prepare regenerated celulose fibre, take corn cob fiber as the raw material of Lyocell fiber, make use of agricultural wastes corncob fully, not only effectively solve the yoke of Lyocell fiber shortage of raw materials, also for the comprehensive utilization of corncob provides brand-new approach; And corn cob fiber element pulp, fibre length short (length is between 0 ~ 0.3mm), the degree of polymerization evenly (between 500 ~ 600), in dicyandiamide solution can rapid dispersion even, and pulp surface distributed has a large amount of holes, there is stronger capillarity, can lyosoption fast, pulp surface is made all to participate in reacting with inside, greatly reduce the reaction time, improve the reaction uniformity, do not need the activation procedure through pulp, shorten production procedure, improve production efficiency.In addition, the present invention in the process preparing spinning solution, by add chelating agent, iron ion in corncob pulp was lost efficacy, thus avoid iron ion the spinning solution degree of polymerization is acutely declined, cause difficulty in spinning, easily break end, make into the negative effects such as a poor product quality, intensity is low.Experimental result shows, regenerated celulose fibre preparation method provided by the invention be uniformly dissolved stable, dissolution time is short, preparation method's dissolution time provided by the invention is 30 ~ 60min, compare wood pulp and shorten 20 ~ 70min, follow-up ropiness can be good, prepared regenerated celulose fibre elongation at break can reach 17.6%, and dry fracture strength can reach 4.5CN/dtex.
In order to further illustrate the present invention, be described in detail to regenerated celulose fibre provided by the invention and its preparation method and application below in conjunction with embodiment, protection scope of the present invention is not limited by the following examples.
Containing corn cob fiber pulp in the embodiment of the present invention and comparative example, the specific requirement in described corn cob fiber pulp, all selects in following scope, and first fibre is 80 ~ 95%, and whiteness is 70 ~ 90%, and ash content is 0 ~ 0.5%, and moisture is 5 ~ 50%.
In embodiment 1 ~ 15, when the moisture that the interpolation of chelating agent is NMMO opportunity is 10% ~ 30%, the character of the corn cob fiber pulp that embodiment 1-15 and documents 1 are selected: in corn cob fiber pulp, first fibre is 80 ~ 95%, whiteness is 70 ~ 90%, ash content is 0 ~ 0.5%, and moisture is 5 ~ 50%.
The preparation method of this corn cob fiber pulp is:
Method one
(1) after corncob being pulverized, under the catalytic action of hydrogen peroxide, the organic acid solution be made up of formic acid and acetic acid is used to carry out boiling to corncob, control boiling temperature 120-155 DEG C, solid-liquid mass ratio is 1:5-1:15, reaction time 10-60min, and the reactant liquor obtained is carried out first time Separation of Solid and Liquid; In described organic acid solution, total acid is dense is 70-95wt%, and the mass ratio of described acetic acid and formic acid is 1:1-1:19, and surplus is water; Hydrogen peroxide accounts for the 1-8wt% of corncob;
(2) described first time solid of obtaining of Separation of Solid and Liquid is collected, under the catalytic action of hydrogen peroxide, the mix acid liquor be made up of formic acid, acetic acid is used to carry out pickling to described solid, control pickling temperature 30-100 DEG C, solid-liquid mass ratio is 1:4-1:20, and the reactant liquor obtained is carried out second time Separation of Solid and Liquid; In described mix acid liquor, total acid is dense is 70-95wt%, and the mass ratio of described acetic acid and formic acid is 1:1-1:19, and surplus is water; Hydrogen peroxide accounts for the 1-8wt% of corncob;
(3) collect the solid that described second time Separation of Solid and Liquid obtains, and wash, control washing temperature is 25-90 DEG C, and starching dense is 1-10wt%, and the washing slurry obtained is carried out third time Separation of Solid and Liquid;
(4) collect described third time the solid that obtains of Separation of Solid and Liquid and screening obtain required screened stock cellulose, after bleaching, obtain corn cob fiber element pulp.
Method two
By in method one, the pickling of step (2) replaces with alkali cleaning, and actual conditions is 12% sodium hydroxide solution, carries out alkali cleaning, alkali cleaning temperature 30-100 DEG C to the solid of step (1), alkali cleaning time 10-30min.Other conditions are constant.
Method three
By in method one, the digestion process of step (1) replaces with: pulverized by corncob, carry out alkali lye boiling 0.5-1.2 hour, obtain corn cob fiber cellulose solution, then carry out Separation of Solid and Liquid.Other conditions are constant.
The character of the corn cob fiber element pulp that comparative example 2 is selected: in corn cob fiber pulp, first fibre is 83%, and whiteness is 65%, and ash content is 1.2%, and moisture is 8%.
Corn cob fiber element pulp is replaced with the wood pulps that the degree of polymerization is 700 by comparative example 3-4.
Corn cob fiber element pulp is replaced with the Cotton Pulp that the degree of polymerization is 700 by comparative example 5-6.
Carry out Performance Detection to the regenerated celulose fibre prepared by above-described embodiment and comparative example, testing result specifically sees the following form 1, and table 1 is condition and the performance data of embodiment 1 ~ 15 and comparative example.
The condition of table 1 embodiment 1 ~ 15 and comparative example and performance data
Applicant states, the present invention illustrates process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned processing step, does not namely mean that the present invention must rely on above-mentioned processing step and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of auxiliary element, the concrete way choice etc. of raw material selected by the present invention, all drops within protection scope of the present invention and open scope.