CN100355959C - Cotton and hemp composite cellulose pulp and method for producing same - Google Patents

Cotton and hemp composite cellulose pulp and method for producing same Download PDF

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Publication number
CN100355959C
CN100355959C CNB200610020985XA CN200610020985A CN100355959C CN 100355959 C CN100355959 C CN 100355959C CN B200610020985X A CNB200610020985X A CN B200610020985XA CN 200610020985 A CN200610020985 A CN 200610020985A CN 100355959 C CN100355959 C CN 100355959C
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cotton
pulp
cellulose pulp
oven dry
dry weight
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CN1865551A (en
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冯涛
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Yibin Grace Co Ltd
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Yibin Grace Co Ltd
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Abstract

The present invention discloses novel composite cellulose pulp made from cotton and hemp through mixing and a producing method thereof. The novel composite cellulose pulp is made from arbitrary two or more than two kinds of raw materials of cotton velvet, wood, the hemp and bamboo through arbitrary combination and has following manufacturing steps of material preparing, material washing, washing, beating, untwining, mixing, impurity removing, washing, acid preparing, chlorine preparing, bleaching, acid processing, impurity removing, washing and filtering. The present invention provides new thoughts of novel viscose cellulose pulp and the production thereof and can effectively integrate the advantages of the raw materials of fibres of the cotton and the hemp to take the essence and discard the dregs so as to satisfy requirements of viscose fibres with different properties and different grades to pulp raw materials.

Description

Cotton, hemp composite cellulose pulp and manufacture method thereof
Technical field
The present invention relates to a kind of field of textiles that is used for, utilize the composite cellulose pulp and the manufacture method thereof of natural cotton, numb raw material production.
Background technology
Along with improving constantly of living standard, dress is warm from satisfying, needs attractive in appearance are transferred to and pursued comfortable, environmental protection, healthy needs to the requirement of dressing for people.At present all be to adopt the single cotton pulp dregs of rice, wood pulps, bamboo pulp, hemp dissolving pulp to make viscose.
Yet, the viscose of each single raw material production such as the cotton pulp dregs of rice, hemp dissolving pulp, the performance dullness, show that individual character is not outstanding, performance has nothing in common with each other, and has their own characteristics each, as deflection, antibacterial bacteriostatic function, fiber soft feeling, deodorization, gas permeability, coloring, the bounce-back of skin affinity, fiber, humidity absorption and releases etc., therefore the viscose of single pulp production can't satisfy people's multiple demand.Find that after deliberation plurality of raw materials is made the compound cellulose pulp, can improve the various performances of fiber, maximizes favourable factors and minimizes unfavourable ones, and remedies each other, and the premium properties of every kind of fiber is represented.Adopt this compound cellulose pulp that the natural compounding type that production performance is many, moral character is high viscose can be provided, satisfy the living needs that people's realization grows with each passing hour.
The existing technological process of adopting raw materials such as velveteen, fiber crops to prepare composite cellulose pulp is: the material → prehydrolysis → boiling → batch turning of getting the raw materials ready → blank → screen → wash → wash expects → screens → discongest → and desanding → concentrated → chlorination, wash material → alkali refining, wash and expect → bleach, wash material → acid treatment → desanding → concentrate → manufacture paper with pulp.This technology only is only applicable to the single cellulose viscose pulp of single raw material preparing, can't adapt to the production of composite cellulose pulp, in alpha cellulose content, whiteness, aspects such as viscosity, ash, iron content and filterability can't satisfy the specification requirement that reaches the composite viscose fiber pulp.
If after production is finished, carry out it compound again each single pulp, by contrast, the compound pulp viscosity profile of many raw material production that the present invention proposes is more even, the cellulose of effectively purifying, more can effectively remove the easier embodiment of good characteristic that non-cellulosic impurity, various raw material possess itself, and performance is more stable.
Summary of the invention
The purpose of this invention is to provide by cotton, fiber crops and mix the compound cellulose pulp and the manufacture method thereof of producing, the new approaches of New Viscose Fibre pulp and production thereof have been proposed, can effectively advantage cotton, fibrilia raw material be put together, select the essence, discarding dross, provide and be satisfied with viscose and show different performance, different class (as different skin affinity, different fiber deflection, different antibacterial bacteriostatic, different fiber soft feeling, different deodorization, different gas permeability, different coloring, different elasticity ratio, different humidity absorption and releases etc.) needs the pulp raw material.In alpha cellulose content, whiteness, aspects such as viscosity, ash, iron content, filterability satisfy the requirement of producing viscose, and can better develop pulp and produce raw material, and it is in short supply to alleviate raw material, and the problem that cost is climbed to a higher point is successively met the need of market.
The technical solution adopted for the present invention to solve the technical problems is:
Cotton, hemp composite cellulose pulp, it is characterized in that by mixing cotton fiber and flax fibre earlier, making pulp then obtains, wherein the percentage by weight of each component is: cotton fiber 1%~99%, flax fibre 1%~99%, resulting pulp has following physical property: ash≤0.22%, moisture 10.0 ± 0.5%, iron content≤35ppm, fat wax≤0.25%, chlorine-bearing compound≤0.25%, pectic substance pentosan≤0.25%, lignin≤1.8%, alpha cellulose 〉=91%, viscosity 〉=8.0mpa.s, whiteness 〉=60%, constant volume weight 120~1020g/m 3, inhale base number 200-970%, swelling capacity 80-300%.
The range of application of compound cellulose pulp of the present invention: acetate fiber, copper ammonia fibre, viscose filament yarn, day silk, viscose short-thread, glassine paper, carbon fiber, CMC.
Cotton of the present invention, hemp composite cellulose pulp manufacture method comprise the steps: condiment, boiling, wash material, washing, making beating are discongested, mixing, removal of impurities washing, pre-acid, pre-chlorine, bleaching, acid treatment, removal of impurities washing, manufacture paper with pulp.
The concrete manufacture method of compound cellulose pulp of the present invention is as follows:
A, condiment: cotton, fibrilia raw material are got the raw materials ready according to said ratio, adjust structure;
B, boiling: cotton soda process, fiber crops employing sulfate process or the sulfite cooking of adopting, press 5.0~35.0% of oven dry weight and add NaOH, Na 2S, Na 2SO 3, H 2SO 3In one or more, liquor ratio is 1: 1.0~9.5, boiling vacuumizes earlier, intensification number of times 〉=1 time, little steam bleeding number of times 〉=0 time;
C, wash material;
D, washing;
E, making beating are discongested: employing beater or fluffer are pulled an oar or are discongested, weight in wet base 5-50 gram;
F, mixing: above-mentioned slurry is mixed in stock tank, or mixing to a certain step of manufacturing paper with pulp from condiment;
G, removal of impurities washing;
H, pre-acid: with the acid amount is 0.2~10.0% of slurry oven dry weight, concentration 1.0~15.0%, pre-acid time 〉=5min;
I, pre-chlorine: chlorine dosage is 0.2~10.0% of a slurry oven dry weight, concentration 0.2~10.0%, pre-chlorine time 〉=15min;
J, bleaching: the viscosity of bleaching disposed slurry is 8~35mpa.s, first fibre 〉=80.0%, whiteness 〉=60%;
K, acid treatment: sulfuric acid or hydrochloric acid are pressed the slurry oven dry weight and are added 0.2~10.0%, and calgon is pressed the slurry oven dry weight and added 0.1~5.0%, processing time 〉=30min;
L, removal of impurities washing;
M, manufacture paper with pulp.
Press 0.3~10% of oven dry weight before the described cooking process and add NaOH, liquor ratio is that 1: 1.0~9.5 pairs raw materials are precooked.
The NaOH that adds a certain amount of concentration before the described washing procedure and be 5%-30% carries out alkali and analyses.
On the basis of technique scheme, be further energy consumption and the stable control quality of reducing, can also adopt one of following several technical measures or whole:
In the described precooking process, do not add alkali lye, directly feed steam.
In the described boiling step, boiling vacuumizes earlier, intensification number of times 〉=1 time, and little steam bleeding number of times 〉=0 time, heat up, temperature retention time≤800 minute in maximum temperature≤200 ℃ of at every turn heating up at every turn.
In the described boiling step, for improving the first fibre, press down bubble, the big gun that disappears, and reduce black liquor COD and colourity, press the MA-1 auxiliary agent that 0.1~3.0% of slurry oven dry weight adds the production of Chongqing long-lived paper making additive factory.But described MA-1 auxiliary agent is a kind of anion surfactant of automated biological degraded.
The novel pulp that adopts the manufacture method of above-mentioned production cotton, hemp composite cellulose pulp to produce, its ash≤0.22%; Moisture 10.0 ± 0.5%; Iron content≤35ppm; Fat wax≤0.25%; Chlorine-bearing compound≤0.25%; Pectic substance pentosan≤0.25%; Lignin≤1.8%; Alpha cellulose 〉=91%; Viscosity 〉=8.0mpa.s; Whiteness 〉=60%; Constant volume weight 120~1020g/m 3Inhale base number 200-970%; Swelling capacity 80-300%.
The invention has the beneficial effects as follows: with cotton, the compound composite cellulose pulp of making of fibrilia raw material, both expanded the raw material sources of dimension card fiber in the pulp production process, and solved the problem that production efficiency is low, cost is high again.Effectively advantage cotton, fibrilia raw material is put together, select the essence, discarding dross, and shorten the processing time and cut down the consumption of energy, thereby help reducing production costs, improve the quality.Beautiful through the composite fibre gloss that spinning makes, have natural good coloring, bounce-back property, humidity absorption and release, gas permeability are better than various synthetic fiber especially, are a kind of fully natural green environment-friendly products.With the exception of this, compound slurry dimension card fiber also has the antibacterial bacteriostatic deodorant function and the texture of the uniqueness that simple use cotton pulp, wood pulp dimension card fiber do not have.Slurry there be precooking of alkali, make the H of continuous generation +Be neutralized, making precooks speeds up, and it is more abundant to precook, and has avoided the corrosion of acid to boiling vessel, has prolonged the service life of boiling vessel.After boiling, adopt alkali to analyse simultaneously, half fibre that produces in the digestion process is dissolved in alkali, thereby reaches the cellulosic purpose of purifying.The novel pulp of being produced has higher alpha cellulose content and whiteness, and viscosity is fit to needs, and ash and iron content are lower, and strainability is better.
The compound pulp of two kinds of raw material production that the present invention proposes is compared with the pulp that single pulp mixes it after production is finished again, viscosity profile is more even, the cellulose of effectively purifying, more can effectively remove the easier embodiment of good characteristic that non-cellulosic impurity, various raw material possess itself, and performance is more stable.
The specific embodiment
The invention will be further described below in conjunction with embodiment.On basis of the present invention, the those of ordinary skill in this technical field can both obtain following relevant art enlightenment: become composite cellulose pulp to be not restricted to the listed raw material of the present invention with natural cotton, numb mixed raw material.
On basis of the present invention, the those of ordinary skill in this technical field can be realized purpose of the present invention in conjunction with other known property general knowledge.
The present invention is not limited only to the literal statement of claim literal, following being included in the scope of the present invention.
Embodiment 1
Composite cellulose pulp of the present invention is that its percentage by weight is: 1%: 99% by velveteen, compound the making of fiber crops.
Composite cellulose pulp of the present invention by cotton fiber, flax fibre is compound forms, the percentage by weight of each component is in its finished product:
Cotton fiber 1%
Flax fibre 99%
Embodiment 2
Composite cellulose pulp of the present invention is that its percentage by weight is: 99%: 1% by velveteen, compound the making of fiber crops.
Composite cellulose pulp of the present invention by cotton fiber, flax fibre is compound forms, the percentage by weight of each component is in its finished product:
Cotton fiber 99%
Flax fibre 1%
Embodiment 3
Composite cellulose pulp is characterized in that: by cotton, numb made according to following weight proportion combination, and cotton: fiber crops=50%: 50%
Composite cellulose pulp of the present invention by cotton fiber, flax fibre is compound forms, the percentage by weight of each component is in its finished product:
Cotton fiber 50%
Flax fibre 50%
Technical indicator of the present invention is:
Ash≤0.19%
Moisture 10.0 ± 0.5%
Iron content≤28ppm
Fat wax≤0.25%
Chlorine-bearing compound≤0.25%
Pectic substance pentosan≤0.25%
Lignin≤1.6%
Alpha cellulose 〉=92%
Viscosity 〉=8.0mpa.s
Whiteness 〉=63%
Constant volume weight 700~900g/m 3
Inhale base number 300-770%
Swelling capacity 100-300%
Its manufacture method comprises the steps: condiment, washes material, washing, making beating are discongested, mixing, removal of impurities washing, pre-acid, pre-chlorine, bleaching, acid treatment, removal of impurities washing, manufacture paper with pulp.
Embodiment 4
A kind of composite cellulose pulp is characterized in that: by cotton, numb made according to following weight proportion combination, and cotton: fiber crops=40%: 60%
Composite cellulose pulp of the present invention by cotton fiber, flax fibre is compound forms, the percentage by weight of each component is in its finished product:
Cotton fiber 40%
Flax fibre 60%
Technical indicator of the present invention is:
Ash≤0.18%;
Moisture 10.0 ± 0.5%;
Iron content≤30ppm;
Fat wax≤0.25%;
Chlorine-bearing compound≤0.25%;
Pectic substance pentosan≤0.25%;
Lignin≤1.7%;
Alpha cellulose 〉=91%;
Viscosity 〉=8.0mpa.s;
Whiteness 〉=62%;
Constant volume weight 650~920g/m3,
Inhale base number 300-870%;
Swelling capacity 90-300%.
Embodiment 5
A kind of composite cellulose pulp is characterized in that: by cotton, numb made according to following weight proportion combination, and cotton: fiber crops=70%: 30%
Composite cellulose pulp of the present invention by cotton fiber, flax fibre is compound forms, the percentage by weight of each component is in its finished product:
Cotton fiber 70%
Flax fibre 30%
Technical indicator of the present invention is:
Ash≤0.15%
Moisture 10.0 ± 0.5%
Iron content≤25ppm
Fat wax≤0.25%
Chlorine-bearing compound≤0.25%
Pectic substance pentosan≤0.25%
Lignin≤1.8%
Alpha cellulose 〉=92.5%
Viscosity 〉=8.5mpa.s;
Whiteness 〉=64%
Constant volume weight 650~850g/m 3
Inhale base number 550-670%
Swelling capacity 160-300%.
Embodiment 6
A kind of composite cellulose pulp is characterized in that: by cotton, numb made according to following weight proportion combination, and cotton: fiber crops=80%: 20%
Composite cellulose pulp of the present invention by cotton fiber, flax fibre is compound forms, the percentage by weight of each component is in its finished product:
Cotton fiber 80%
Flax fibre 20%
Technical indicator of the present invention is:
Ash≤0.13%
Moisture 10.0 ± 0.5%
Iron content≤22ppm
Fat wax≤0.25%
Chlorine-bearing compound≤0.25%
Pectic substance pentosan≤0.25%
Lignin≤1.9%
Alpha cellulose 〉=92%
Viscosity 〉=8.2mpa.s;
Whiteness 〉=68%
Constant volume weight 600~920g/m3
Inhale base number 500-760%
Swelling capacity 100-300%.
Embodiment 7
The manufacture method of composite cellulose pulp of the present invention comprises the steps:
(1) condiment: cotton, the plain raw material of flax fibre are prepared respectively, adjusted structure;
(2) precook: precook or not precook, precook, adopt rotary spherical digester, upright pot or boiling vessel, press 0.3~10% of oven dry weight and add NaOH, liquor ratio is 1: 1.0-9.5; Adopt to inject certain density (≤30%) alkali lye, intensification number of times 〉=1 time, little steam bleeding number of times 〉=0 time, heat up, temperature retention time≤650 minute in maximum temperature≤200 ℃ of at every turn heating up at every turn.
(3) boiling: cotton soda process, fiber crops employing sulfate process or the sulfite cooking of adopting, press 5.0~35.0% of oven dry weight and add NaOH, Na 2S, Na 2SO 3, H 2SO 3In one or more, liquor ratio is 1: 1.0~9.5, boiling vacuumizes earlier, intensification number of times 〉=1 time, little steam bleeding number of times 〉=0 time, heat up, temperature retention time≤800 minute in maximum temperature≤200 ℃ of at every turn heating up at every turn.
For improving the first fibre, press down bubble, the big gun that disappears, and reduce black liquor COD and colourity, press the MA-1 auxiliary agent that 0.1~3.0% of slurry oven dry weight adds the production of Chongqing long-lived paper making additive factory.
(4) wash material: adopt CX sieve, jumping sieve, selectifier to screen, and by the diffuser washing, vacuum pulp washing machine series connection washing, pressure measurement thickener wash, belt pulp washing machine washing carrying out washing impurity-removing.
(5) alkali is analysed: adopt alkali to analyse after boiling, add the NaOH that a certain amount of concentration is 5%-30%, half fibre that produces in the digestion process is dissolved in alkali, thereby reach the cellulosic purpose of purifying.
(6) washing: by the diffuser washing, vacuum pulp washing machine series connection washing, the washing of pressure measurement thickener, belt pulp washing machine washing carrying out washing impurity-removing.
(7) making beating is discongested: employing beater or fluffer are pulled an oar or are discongested, weight in wet base 5-50 gram;
(8) mix: above-mentioned slurry is mixed in stock tank; Or mixing to a certain step of manufacturing paper with pulp from condiment.A certain step between those of ordinary skills follow after understanding content of the present invention and blend step can be placed on condiment and manufacture paper with pulp according to actual conditions is mixed, such as the bleaching process rear end.
(9) removal of impurities washing: equipment adopts 606 desanders, high concentration desanding device, heavy desander, lightweight desander etc.Concentration: 0.2-2.5%, pressure 〉=0.25Mpa.
(10) pre-acid: with the acid amount is 0.2~10.0% of slurry over dry, concentration 1.0~15.0%, pre-acid time 〉=5min, concentration 1.0-15.0%.
(11) pre-chlorine: chlorine dosage is 0.2~10.0% of a slurry over dry, concentration 0.2~10: 0%, and pre-chlorine time 〉=15min;
(12) bleaching: continue to remove lignin and coloring matter, with the reaction of lignin mainly be oxidative degradation, and the chlorination substitution reaction is arranged, the coloring matter generation oxidation with in the paper pulp is faded it, reaches certain whiteness requirement; And the viscosity and the degree of polymerization of adjustment pulp.
At first, bleach, promptly press the slurry over dry and add 0.5.0~15.0% clorox with hypochlorous acid, processing time 〉=20min, concentration: 1.0~18.0%, transfer alkali 15~350g/m 3, 10~75 ℃ of temperature.
Secondly, use hydrogen peroxide bleaching again, promptly press the slurry oven dry weight and add 0.5~15.0% hydrogen peroxide, transfer alkali 30~150g/m 3
(13) acid treatment: sulfuric acid or hydrochloric acid are pressed the slurry oven dry weight and are added 0.2~10.0%, and calgon is pressed the slurry oven dry weight and added 0.1~5.0%, processing time 〉=30min; Gained pulp methyl fiber 〉=80%, viscosity 8.0~35map.s, ash content≤0.25%, irony≤40ppm, whiteness 〉=60%.
(14) removal of impurities washing: equipment adopts 606 desanders, high concentration desanding device, heavy desander, lightweight desander etc.Concentration: 0.2-2.5%, pressure 〉=0.25Mpa.
(15) manufacture paper with pulp:
The manufacture method that adopts the present invention to produce cotton, hemp composite cellulose pulp can be produced the pulp of the production needs that can satisfy viscose, acetate fiber, copper ammonia fibre, Tencel (day silk), glassine paper, carbon fiber, CMC artificial fibres such as (cellulose ethers).This method puts together advantage cotton, fibrilia raw material effectively, selects the essence, discarding dross, and shortens the processing time and cut down the consumption of energy, thereby help reducing production costs, and improves the quality.
Embodiment 8
Raw material is chosen after the outfit, precooks: alkali charge 0.3%, liquor ratio 1: 2.8, heating-up time 100min, 167 ℃ of holding temperatures, temperature retention time 90min; Boiling: alkali charge 26%, liquor ratio 1: 3.2, heating-up time 120min, 167 ℃ of holding temperatures, temperature retention time 220min; The pre-chlorine of pre-acid: the hydrochloric acid consumption is a slurry oven dry weight 2.5%, and time 20min, clorox consumption are 1.5% of slurry oven dry weight, time 40min.Sodium hypochlorite bleaching: transfer alkali 85g/m 3, inferior chlorine consumption is 1.2% of a slurry oven dry weight, 44 ℃ of temperature, time 60min; Hydrogen peroxide bleaching: transfer alkali 90g/m3,60 ℃ of temperature, the hydrogen peroxide consumption is 2.3% of a slurry oven dry weight, stabilizing agent dosage is 1.0% of a slurry oven dry weight, time 100min; Acid treatment: the hydrochloric acid consumption is 1.6% of a slurry oven dry weight, time 50min.Pulp finished product detection result: viscosity 12.7mpa.s, first fibre 95.8%, ash 0.07%, irony 8ppm, whiteness 82% is inhaled base number 580%, swelling capacity 1 75%, quantitatively 768g/m 2, moisture 10.3%.
Embodiment 9
Raw material is chosen after the outfit, precooks: alkali charge 0.5%, liquor ratio 1: 3.6, heating-up time 100min, 167 ℃ of holding temperatures, temperature retention time 80min; Boiling: alkali charge 28%, liquor ratio 1: 3.5, heating-up time 120min, 169 ℃ of holding temperatures, temperature retention time 230min; The pre-chlorine of pre-acid: the hydrochloric acid consumption is 2.5% of a slurry oven dry weight, and time 20min, clorox consumption are 0.7% of slurry oven dry weight, time 40min.Sodium hypochlorite bleaching: transfer alkali 80g/m3, the clorox consumption is 0.5% of a slurry oven dry weight, 45 ℃ of temperature, time 60min; Hydrogen peroxide bleaching: transfer alkali 90g/m3,55 ℃ of temperature, the hydrogen peroxide consumption is 1.7% of a slurry oven dry weight, stabilizing agent dosage is 1.0% of a slurry oven dry weight, time 90min; Acid treatment: the hydrochloric acid consumption is 1.8% of a slurry oven dry weight, time 50min.Pulp finished product detection result: viscosity 12.3mpa.s, first fibre 91.2%, ash 0.12%, irony 15ppm, whiteness 75% is inhaled base number 560%, swelling capacity 175%, quantitatively 770g/m 2, moisture 10.4%.
Embodiment 10
Raw material is chosen after the outfit, precooks: alkali charge 0.8%, liquor ratio 1: 4.0, heating-up time 100min, 165 ℃ of holding temperatures, temperature retention time 60min; Boiling: alkali charge 30%, liquor ratio 1: 4.0, heating-up time 120min, 170 ℃ of holding temperatures, temperature retention time 240min; The pre-chlorine of pre-acid: the hydrochloric acid consumption is 1.5% of a slurry oven dry weight, and time 20min, clorox consumption are 1.2% of slurry oven dry weight, time 40min.Sodium hypochlorite bleaching: transfer alkali 80g/m3, the clorox consumption is 0.4% of a slurry oven dry weight, 47 ℃ of temperature, time 60min; Hydrogen peroxide bleaching: transfer alkali 90g/m3,50 ℃ of temperature, the hydrogen peroxide consumption is 1.0% of a slurry oven dry weight, stabilizing agent dosage is 1.0% of a slurry oven dry weight, time 70min; Acid treatment: the hydrochloric acid consumption is 2.0% of a slurry oven dry weight, time 40min.Pulp finished product detection result: viscosity 13.3mpa.s, first fibre 88.6%, ash 0.18%, irony 32ppm, whiteness 71% is inhaled base number 563%, swelling capacity 1 70%, quantitatively 750g/m 2, moisture 10.1%.
Embodiment 11
The manufacture method of the foregoing description 7~11 is applicable to the preparation of embodiment 1 to embodiment 6 described composite cellulose pulp.
Embodiment 12
Composite cellulose pulp QUALITY STANDARD of the present invention such as following table:
Project Unit Index
Specification mm 800*610
Constant volume weight g/m 3 120-1020
Moisture content 10.0±0.5
Pulp Bao Chong The Kg/ bag 120±0.5
Viscosity mpa.s ≥8.0
The first fibre ≥91
Ash ≤0.22
Irony PPm ≤35
Inhale base number 200-970
Swelling capacity 80-300
Whiteness ≥60
Embodiment 13
The specification that described compound cellulose pulp is made a kind of composite cellulose viscose filament yarn is as described below:
(D is a Denier unit to fiber number specification: 60~1200D: the dawn);
Monofilament radical: 10~200 (the monofilament radical is consistent with the spinning head hole count);
Include light, semimat, full-dull and painted silk;
The strand shape comprises conventional silk, flat filament and other shaped filaments.
The technical indicator of the composite cellulose viscose filament yarn that the composite fibre viscose glue pulp that makes by the present invention further makes comprises:
Do fracture strength: 1.95-2.1CN/dtex
Wet breaking strength: 1.05-1.27CN/dtex
Dried elongation at break: 18.6%-20.0%
Fineness deviation ratio :-1.1%-+0.8%
Whiteness: 71.6%-74.3%
Residual sulfur content: 7.2%-9.3%
Regain: 12.0%-12.3%
Oil content: 0.5%-0.7%.
Embodiment 14
The processing step of the composite cellulose viscose filament yarn that the composite fibre viscose glue pulp that utilizes the present invention to make further makes: mix the dregs of rice, dipping, squeezing, pulverizing, yellow, viscose glue pulverizing, dissolving, grinding, filtration, maturation, deaeration, spinning, refining, oven dry and become tube.
The above-mentioned mixed dregs of rice, dipping, squeezing, pulverizing, experienced operation are meant: the compound cellulose pulp through mixing the dregs of rice is immersed under 30~50 ℃ temperature conditions in the alkali lye that concentration is 200~240g/L, again after the squeezer squeezing, pulverizing, reaching in the alkali fibre the fine content of first is 26~33%, alkali content is 15~18%, and density is 100~150Kg/m 3Add the VIF-64 modifying agent that can improve the compound cellulose reactivity worth during dipping.Adopt the secondary temperature elevation control method during dipping, improved the reactivity worth of compound cellulose, effectively improve its reaction effect.Use spray equipment to add the VIF-9 stabilizing agent that improves the compound cellulose degree of polymerization in the expressing process, make that to fall collecting process more uniform and stable, the fine stable polymerization degree homogeneous of alkali.2000~3000 rev/mins of pulverization rollers that rotate at a high speed of employing make compound cellulose alkali fibre obtain good crushing effect during pulverizing, guarantee the abundant of yellow reaction.Experienced operation is used the experienced machine of belt, guarantees that the alkali fibre that enters experienced machine carries out according to first in first out, makes the fine chain rupture of compound cellulose alkali even, the fine stable polymerization degree homogeneous of alkali.
Above-mentioned yellow, dissolution process adopt dry method constant temperature yellow method, and dry method constant temperature yellow method is meant: the CS that adds α-cell (methylcellulose) 26~35% in the relative alkali fibre in the alkali fibre 2(carbon disulfide), yellow temperature are 26~32 ℃, and the yellow time is 30~80 minutes.Add CS 2Shi Caiyong circulating line and spray equipment evenly add, and make CS 2In compound cellulose alkali fibre, fully mix.After yellow, add the VIF-51/41 denaturant that improves viscose filtration performance and spinning property, effectively improve the strainability and the spinning property of compound cellulose viscose glue.The alkali lye total amount that yellow need add (forming calculating according to viscose glue) is divided 3 adding xanthating machines, and the last 30% pair of xanthating machine that adds total amount behind xanthating machine material clearancen washes.Adopt the viscose glue pulverizer to carry out coarse crushing after the yellow, under 6~15 ℃ temperature, dissolve, make viscose glue reach good solute effect.
Above-mentioned spinning process is meant: will carry out regeneration, drawing-off, cellulose macromolecule crystallization and rearrangement, the wire strip forming of composite fibre cellulose fiber through the viscose glue of dissolving, deaeration, filtration with continuous spinning machine or semi-continuous spinning machine.
The viscose glue that the compound cellulose that above-mentioned spinning process adopted makes comprises following feature: α-cell (methylcellulose) content: 7.8~8.20%; NaOH content is: 5.90~6.25%; Viscosity (falling ball method) is: 28~45 seconds; Degree of ripeness (NH4Cl value): 8.6~11.0ml; Population (in every milliliter of viscose glue 〉=10 micro particles numbers) be :≤1500; The secondary blob of viscose is: (number in every milliliter of viscose glue) is :≤10; The viscose glue surface tension is: 40~50dynes/cm; Esterification degree: 35~45.Owing to adopted above-mentioned feature, the viscose glue that makes compound cellulose make has possessed good spinning properties, can produce high-quality viscose filament yarn.
The acid bath that above-mentioned spinning process adopted comprises following feature: H 2SO 4Content (54 ℃ time measure) is: 130~150g/l; ZnSO 4Content (54 ℃ time measure) is: 10-13g/l; Na 2SO 4Content (54 ℃ time measure) is: 220~265g/l; The acid bath temperature is: 51~56 ℃; The acid bath surface tension is: 40~50dynes/cm.Used denaturant VIF-53 and VIF-10 in acid bath, stabilizing agent VIF-70 has effectively improved the acid bath characteristic, and acid bath is suitable for and the supporting spinning properties of compound cellulose viscose glue.
Above-mentioned concise operation is meant: in washing facility spinning cake or strand are carried out desulfurization, bleach and oil.Ao's mixture VIF-80 that strengthens composite fibre cellulose fiber desulfurization performance and the hardening agent VIF-90 that strengthens discoloration have been used in the refining process.This method is adopted in refining, has effectively improved composite fibre cellulose fiber refining effect, and character such as fiber sulfur-bearing, whiteness are effectively improved.

Claims (7)

1, cotton, the hemp composite cellulose pulp, it is characterized in that by mixing cotton fiber and flax fibre earlier, making pulp then obtains, wherein the percentage by weight of each component is: cotton fiber 1%~99%, flax fibre 1%~99%, resulting pulp has following physical property: ash≤0.22%, moisture 10.0 ± 0.5%, iron content≤35ppm, fat wax≤0.25%, chlorine-bearing compound≤0.25%, pectic substance pentosan≤0.25%, lignin≤1.8%, alpha cellulose 〉=91%, viscosity 〉=8.0mpa.s, whiteness 〉=60%, constant volume weight 120~1020g/m 3, inhale base number 200-970%, swelling capacity 80-300%.
2, the manufacture method of cotton according to claim 1, hemp composite cellulose pulp is characterized in that concrete manufacture method is as follows:
A, condiment: cotton, fibrilia raw material are got the raw materials ready according to said ratio, adjust structure;
B, boiling: cotton soda process, fiber crops employing sulfate process or the sulfite cooking of adopting, press 5.0~35.0% of oven dry weight and add NaOH, Na 2S, Na 2SO 3, H 2SO 3In one or more, liquor ratio is 1: 1.0~9.5, boiling vacuumizes earlier, intensification number of times 〉=1 time, little steam bleeding number of times 〉=0 time;
C, wash material;
D, washing;
E, making beating are discongested: employing beater or fluffer are pulled an oar or are discongested, weight in wet base 5-50 gram;
F, mixing: above-mentioned slurry is mixed in stock tank, or mixing to a certain step of manufacturing paper with pulp from condiment;
G, removal of impurities washing;
H, pre-acid: with the acid amount is 0.2~10.0% of slurry oven dry weight, concentration 1.0~15.0%, pre-acid time 〉=5min;
I, pre-chlorine: chlorine dosage is 0.2~10.0% of a slurry oven dry weight, concentration 0.2~10.0%, pre-chlorine time 〉=15min;
J, bleaching: the viscosity of bleaching disposed slurry is 8~35mpa.s, first fibre 〉=80.0%, whiteness 〉=60%;
K, acid treatment: sulfuric acid or hydrochloric acid are pressed the slurry oven dry weight and are added 0.2~10.0%, and calgon is pressed the slurry oven dry weight and added 0.1~5.0%, processing time 〉=30min;
L, removal of impurities washing; M, manufacture paper with pulp.
3, the manufacture method of cotton according to claim 2, hemp composite cellulose pulp is characterized in that: press 0.3~10% of oven dry weight before the described cooking process and add NaOH, liquor ratio is that 1: 1.0~9.5 pairs raw materials are precooked.
4, the manufacture method of cotton according to claim 2, hemp composite cellulose pulp is characterized in that: the NaOH that adds a certain amount of concentration before the described washing procedure and be 5%-30% carries out alkali and analyses.
5, the manufacture method of cotton according to claim 2, hemp composite cellulose pulp is characterized in that: feed steam feed before the described cooking process and precook.
6, the manufacture method of cotton according to claim 2, hemp composite cellulose pulp, it is characterized in that: in the described boiling step, boiling vacuumizes earlier, the employing one or many heats up, little steam bleeding number of times 〉=0 time, each intensification maximum temperature≤200 ℃ heats up, temperature retention time≤800 minute at every turn.
7, the manufacture method of cotton according to claim 2, hemp composite cellulose pulp is characterized in that: in the described boiling step, press 0.1~3.0% of slurry oven dry weight and add the MA-1 auxiliary agent.
CNB200610020985XA 2006-05-08 2006-05-08 Cotton and hemp composite cellulose pulp and method for producing same Expired - Fee Related CN100355959C (en)

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CN103668500B (en) * 2013-11-29 2015-11-18 南通市通州区大达麻纺织有限公司 A kind of cotton ramie blended spinning technique
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