CN1544726A - High-performance cellulose viscose and process for making same - Google Patents
High-performance cellulose viscose and process for making same Download PDFInfo
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Abstract
The invention discloses a high-performance viscose fiber produced by using bamboo pulp as one of the raw materials, prepared of the raw materials in weight percents: bamboo pulp 1-99% and cotton pulp 1-99%, bamboo pulp 1-99% and wood pulp 1-99%, or bamboo pulp 1-99%, cotton pulp 1-55% and wood pulp 1-55%; its preparing method includes the following technical steps: mixing pulps, dipping, pressing, crushing, yellowing, dissolving, spinning, refining, drying and packaging, where the yellowing working procedure includes: wet-heating yellowing and dry-constant temperature yellowing. The raw materials are easy to obtain and low-cost; the made viscose fiber has not only good hygroscopic property, dyeing property and antistatic behavior but also natural antibacterial and bacteriostatic property.
Description
Technical field:
The present invention relates to a kind of viscose and preparation method thereof, particularly relating to a kind of is high-performance short rayon fiber peacekeeping viscose filament yarn of producing of one of raw material and preparation method thereof with the bamboo pulp.
Background technology:
Viscose is as a kind of textile raw material, because of it has moisture absorption preferably, ventilative, dyeing, performance such as antistatic, extensive market prospects is arranged, it is raw material that traditional mode of production all adopts native celluloses such as cotton linter, timber, make through a series of chemical treatments, but along with the shortage of the development of China's viscose and cotton linter, timber, the price of cotton linter, timber goes up gradually, causes the production cost of viscose to raise thus; Meanwhile, though at present newly developed to have gone out a kind of be the viscose of raw material production with the natural bamboo, but with the pulp that pure bamboo fibre is made, its first fibre weight is lower, half fine content height, the reactivity worth of bamboo cellulose differs greatly, make that the degree of ripeness fluctuation of viscose glue is bigger after the yellow operation, and xanthate acid group skewness, the viscose glue muddiness, structural viscosity is big, has had a strong impact on the finished fiber quality.
Summary of the invention:
The purpose of this invention is to provide a kind of is high-performance viscose fiber of raw material production and preparation method thereof with bamboo pulp, the cotton pulp dregs of rice or wood pulps, viscose obtained by this method, not only have good hygroscopicity, dyeability and antistatic behaviour, also possess natural antibiotic and bacteriostasis property simultaneously.
Technical scheme of the present invention is as follows:
A kind of high-performance viscose fiber, comprise short rayon fiber peacekeeping viscose filament yarn, it is formulated by following weight percentages: bamboo pulp 1～99%, the cotton pulp dregs of rice 1～99%, perhaps bamboo pulp 1～99%, wood pulps 1～99%, perhaps bamboo pulp 1～99%, the cotton pulp dregs of rice 1～55%, wood pulps 1～55%.
Preparation method of the present invention comprises following processing step: mix the dregs of rice, dipping, squeezing, pulverizing, yellow, dissolving, spinning, concise, oven dry and packing, it is characterized in that: described yellow operation comprises wet method intensification yellow method and dry method constant temperature yellow method, and its concrete grammar is as follows:
A, wet method intensification yellow method are meant: the carbon disulfide that adds relative alkali fiber weight 26～35% in the alkali fiber after concentration is the pre-alkalization of NaOH of 100～130g/L, the yellow initial temperature is 12～20 ℃, whole temperature is 26～34 ℃, and the yellow time is 60～110min.
B, dry method constant temperature yellow method are meant: add the carbon disulfide of relative alkali fiber weight 26～35% in the alkali fiber after concentration is the pre-alkalization of NaOH of 100～130g/L, the yellow temperature constant is at 30～32 ℃, and the yellow time is 30～100min.
The mixed dregs of rice of the present invention, dipping, squeezing, pulverizing process are meant: with bamboo pulp and the cotton pulp dregs of rice or bamboo pulp and wood pulps or bamboo pulp and the cotton pulp dregs of rice, wood pulps mixed according to the above ratio after, under 40～55 ℃ temperature conditions, be immersed in the sodium hydroxide lye that concentration is 220～250g/L, again after the squeezer squeezing, pulverizing, reaching in the alkali fibre the fine content of first is 26～32%, alkali content is 15～18%, and density is 150～200Kg/m
3
Dissolving and back two stages of dissolving just were dissolved in the xanthating machine and carry out at the beginning of dissolution process of the present invention divided, and the dissolving alkali liquid temperature is lower than 18 ℃, after be dissolved in the dissolving machine and carry out, back solution temperature is 8～25 ℃, dissolution time is 50～150min.
Spinning process of the present invention is meant: will carry out spinning with spinning machine through the viscose glue of dissolving, deaeration, filtration, make spinning cake or staple fibre, wherein the temperature of acid bath is 44～56 ℃, the content of acid solution is: sulfuric acid 70～140g/L, sodium sulphate 190～330g/L, zinc sulfate 6～15g/L, total draft are 1.8～2.3.
Refining procedure of the present invention is meant: in washing facility spinning cake or staple fibre are carried out desulfurization, chlorohydric acid pickling and oil, wherein: desulfurization temperature is 30～80 ℃, and alkali concn is 2～8g/L, and pickling temperature is 20～50 ℃, concentration 1～5g/L, last oil concentration are 2～8g/L.
Oven dry of the present invention, packing process are meant: with dryer with spinning cake or staple fibre dry to temperature be 70～130 ℃, containing and wetly be lower than at 10% o'clock and promptly carry out long filament winder packing or staple fibre weighing packing.
Raw material of the present invention is easy to get, and cost is low, and the viscose that makes not only has good hygroscopicity, dyeability and antistatic behaviour, also possesses natural antibiotic and bacteriostasis property simultaneously.
The specific embodiment:
Embodiment 1
A kind of high performance viscose staple fibre, it is formulated by following weight percentages: bamboo pulp 99%, the cotton pulp dregs of rice 1%.
Preparation method of the present invention comprises following processing step: mix the dregs of rice, dipping, squeezing, pulverizing, yellow, dissolving, spinning, concise, oven dry and packing, it is characterized in that: described yellow operation adopts wet method intensification yellow method, its concrete grammar is: in concentration is the carbon disulfide that adds relative alkali fiber weight 26% in the pre-alkalizing solution of NaOH of 110g/L, the yellow initial temperature is 15 ℃, whole temperature is 30 ℃, and the yellow time is 90min.
The mixed dregs of rice of the present invention, dipping, squeezing, pulverizing process are meant: with bamboo pulp and the cotton pulp dregs of rice mixed according to the above ratio after, under 50 ℃ temperature conditions, be immersed in the sodium hydroxide lye that concentration is 220g/L, again after the squeezer squeezing, pulverizing, reaching the fine content of the fine first of alkali is 26%, alkali content is 15%, and density is 150Kg/m
3
Dissolving and back two stages of dissolving just were dissolved in the xanthating machine and carry out at the beginning of dissolution process of the present invention divided, and the dissolving alkali liquid temperature is 8 ℃, after be dissolved in the dissolving machine and carry out, back solution temperature is 20 ℃, dissolution time is 100min.
Spinning process of the present invention is meant: will carry out spinning with spinning machine through the viscose glue of dissolving, deaeration, filtration, and make staple fibre.The temperature of wherein carrying out acid bath is 45 ℃, and the content of acid solution is sulfuric acid 70g/L, sodium sulphate 330g/L, and zinc sulfate 6g/L, total draft are 2.0.
Refining procedure of the present invention is meant: in refining equipment fiber is carried out desulfurization, chlorohydric acid pickling and oil, wherein: desulfurization temperature is 50 ℃, and alkali concn is 5g/L, and pickling temperature is 30 ℃, and concentration is 5g/L, and last oil concentration is 5g/L.
Oven dry of the present invention, packing process are meant: with dryer with fiber dry to temperature be 90 ℃, containing and wet be lower than at 10% o'clock and carry out the weighing packing.
Embodiment 2
A kind of high performance viscose staple fibre, it is formulated by following weight percentages: bamboo pulp 1%, wood pulps 99%.
Preparation method of the present invention comprises following processing step: mix the dregs of rice, dipping, squeezing, pulverizing, yellow, dissolving, spinning, concise, oven dry and packing, it is characterized in that: described yellow operation adopts dry method constant temperature yellow method, its concrete grammar is: the carbon disulfide that adds relative alkali fiber weight 35% in the alkali fiber after concentration is the pre-alkalization of NaOH of 130g/L, the yellow temperature constant is at 32 ℃, and the yellow time is 100min.
The mixed dregs of rice of the present invention, dipping, squeezing, pulverizing process are meant: with bamboo pulp and wood pulps mixed according to the above ratio after, under 55 ℃ temperature conditions, be immersed in the sodium hydroxide lye that concentration is 250g/L, again after the squeezer squeezing, pulverizing, reaching the fine content of the fine first of alkali is 32%, alkali content is 18%, and density is 200Kg/m
3
Dissolving and back two stages of dissolving just were dissolved in the xanthating machine and carry out at the beginning of dissolution process of the present invention divided, and the dissolving alkali liquid temperature is 5 ℃, after be dissolved in the dissolving machine and carry out, back solution temperature is 25 ℃, dissolution time is 50min.
Spinning process of the present invention is meant: will carry out spinning with spinning machine through the viscose glue of dissolving, deaeration, filtration, and make staple fibre.The temperature of wherein carrying out acid bath is 50 ℃, and the content of acid solution is sulfuric acid 140g/L, sodium sulphate 190g/L, and zinc sulfate 15g/L, total draft are 1.8.
Refining procedure of the present invention is meant: in refining equipment fiber is carried out desulfurization, chlorohydric acid pickling and oil, wherein: desulfurization temperature is 80 ℃, and alkali concn is 8g/L, and pickling temperature is 50 ℃, and concentration 1g/L, last oil concentration are 2g/L.
Oven dry of the present invention, packing process are meant: with dryer with fiber dry to temperature be 95 ℃, containing and wet be lower than at 10% o'clock and carry out the weighing packing.
Embodiment 3
A kind of high performance viscose staple fibre, it is formulated by following weight percentages: bamboo pulp 90%, the cotton pulp dregs of rice 5%, wood pulps 5%.
Preparation method of the present invention comprises following processing step: mix the dregs of rice, dipping, squeezing, pulverizing, yellow, dissolving, spinning, concise, oven dry and packing, it is characterized in that: described yellow operation adopts wet method intensification yellow method, its concrete grammar is: in concentration is the carbon disulfide that adds relative alkali fiber weight 30% in the pre-alkalizing solution of NaOH of 120g/L, the yellow initial temperature is 20 ℃, whole temperature is 34 ℃, and the yellow time is 100min.
The mixed dregs of rice of the present invention, dipping, squeezing, pulverizing process are meant: after bamboo pulp, the cotton pulp dregs of rice and wood pulps are mixed according to the above ratio, under 40 ℃ temperature conditions, be immersed in the sodium hydroxide lye that concentration is 240g/L, again after the squeezer squeezing, pulverizing, reaching the fine content of the fine first of alkali is 32%, alkali content is 17%, and density is 180Kg/m
3
Dissolving and back two stages of dissolving just were dissolved in the xanthating machine and carry out at the beginning of dissolution process of the present invention divided, and the dissolving alkali liquid temperature is 3 ℃, after be dissolved in the dissolving machine and carry out, back solution temperature is 10 ℃, dissolution time is 80min.
Spinning process of the present invention is meant: will carry out spinning with spinning machine through the viscose glue of dissolving, deaeration, filtration, and make staple fibre.The temperature of wherein carrying out acid bath is 50 ℃, and the content of acid solution is sulfuric acid 140g/L, sodium sulphate 190g/L, and zinc sulfate 15g/L, total draft are 1.8.
Refining procedure of the present invention is meant: in refining equipment fiber is carried out desulfurization, chlorohydric acid pickling and oil, wherein: desulfurization temperature is 80 ℃, and alkali concn is 8g/L, and pickling temperature is 50 ℃, and concentration 1g/L, last oil concentration are 2g/L.
Oven dry of the present invention, packing process are meant: with dryer with fiber dry to temperature be 95 ℃, containing and wet be not more than at 10% o'clock and carry out the weighing packing.
Embodiment 4
A kind of high performance viscose filament yarn, it is formulated by following weight percentages: bamboo pulp 99%, the cotton pulp dregs of rice 1%.
Preparation method of the present invention comprises following processing step: mix the dregs of rice, dipping, squeezing, pulverizing, yellow, dissolving, spinning, concise, oven dry, become tube, classification packing, it is characterized in that: described yellow operation adopts wet method intensification yellow method, its concrete grammar is: in concentration is the carbon disulfide that adds relative alkali fiber weight 26% in the pre-alkalizing solution of NaOH of 120g/L, the yellow initial temperature is 15 ℃, whole temperature is 30 ℃, and the yellow time is 90min.
The mixed dregs of rice of the present invention, dipping, squeezing, pulverizing process are meant: with bamboo pulp and the cotton pulp dregs of rice mixed according to the above ratio after, under 50 ℃ temperature conditions, be immersed in the sodium hydroxide lye that concentration is 220g/L, again after the squeezer squeezing, pulverizing, reaching the fine content of the fine first of alkali is 26%, alkali content is 15%, and density is 150Kg/m
3
Dissolving and back two stages of dissolving just were dissolved in the xanthating machine and carry out at the beginning of dissolution process of the present invention divided, and the dissolving alkali liquid temperature is 8 ℃, after be dissolved in the dissolving machine and carry out, back solution temperature is 20 ℃, dissolution time is 100min.
Spinning process of the present invention is meant: will carry out spinning with spinning machine through the viscose glue of dissolving, deaeration, filtration, and make spinning cake.The temperature of wherein carrying out acid bath is 45 ℃, and the content of acid solution is sulfuric acid 70g/L, sodium sulphate 330g/L, and zinc sulfate 6g/L, total draft are 2.0.
Refining procedure of the present invention is meant: in refining equipment spinning cake is carried out desulfurization, pickling alkali cleaning, bleaches and oils, wherein: desulfurization temperature is 50 ℃, and alkali concn is 5g/L, and pickling temperature is 30 ℃, and concentration is 5g/L, and last oil concentration is 5g/L.
Oven dry of the present invention, become tube, classification packing to be meant: with dryer with spinning cake dry to temperature be 90 ℃, containing and wetly be carried out to tube, classification packing after being lower than 10%.
Embodiment 5
A kind of high performance viscose filament yarn, it is formulated by following weight percentages: bamboo pulp 1%, wood pulps 99%.
Preparation method of the present invention comprises following processing step: mix the dregs of rice, dipping, squeezing, pulverizing, yellow, dissolving, spinning, concise, oven dry and packing, it is characterized in that: described yellow operation adopts dry method constant temperature yellow method, its concrete grammar is: the carbon disulfide that adds relative alkali fiber weight 35% in the alkali fiber after concentration is the pre-alkalization of NaOH of 100g/L, the yellow temperature constant is at 32 ℃, and the yellow time is 100min.
The mixed dregs of rice of the present invention, dipping, squeezing, pulverizing process are meant: with bamboo pulp and the cotton pulp dregs of rice or bamboo pulp and wood pulps or bamboo pulp and the cotton pulp dregs of rice, wood pulps mixed according to the above ratio after, under 55 ℃ temperature conditions, be immersed in the sodium hydroxide lye that concentration is 250g/L, again after the squeezer squeezing, pulverizing, reaching the fine content of the fine first of alkali is 32%, alkali content is 18%, and density is 200Kg/m
3
Dissolving and back two stages of dissolving just were dissolved in the xanthating machine and carry out at the beginning of dissolution process of the present invention divided, and the dissolving alkali liquid temperature is 5 ℃, after be dissolved in the dissolving machine and carry out, back solution temperature is 25 ℃, dissolution time is 50min.
Spinning process of the present invention is meant: will carry out spinning with spinning machine through the viscose glue of dissolving, deaeration, filtration, and make spinning cake.The temperature of wherein carrying out acid bath is 50 ℃, and the content of acid solution is sulfuric acid 140g/L, sodium sulphate 190g/L, and zinc sulfate 15g/L, total draft are 1.8.
Refining procedure of the present invention is meant: in refining equipment spinning cake is carried out desulfurization, pickling alkali cleaning, bleaches and oils, wherein: desulfurization temperature is 50 ℃, and alkali concn is 8g/L, and pickling temperature is 50 ℃, and concentration is 5g/L, and last oil concentration is 2g/L.
Oven dry of the present invention, become tube, classification packing to be meant: with dryer with spinning cake dry to temperature be 95 ℃, containing and wetly be carried out to tube, classification packing after being not more than 10%.
Embodiment 6
A kind of high performance viscose filament yarn, it is formulated by following weight percentages: bamboo pulp 90%, the cotton pulp dregs of rice 5%, wood pulps 5%.
Preparation method of the present invention comprises following processing step: mix the dregs of rice, dipping, squeezing, pulverizing, yellow, dissolving, spinning, concise, oven dry and packing, it is characterized in that: described yellow operation adopts wet method intensification yellow method, its concrete grammar is: in concentration is the carbon disulfide that adds relative alkali fiber weight 30% in the pre-alkalizing solution of NaOH of 120g/L, the yellow initial temperature is 20 ℃, whole temperature is 34 ℃, and the yellow time is 100min.
The mixed dregs of rice of the present invention, dipping, squeezing, pulverizing process are meant: with bamboo pulp and the cotton pulp dregs of rice or bamboo pulp and wood pulps or bamboo pulp and the cotton pulp dregs of rice, wood pulps mixed according to the above ratio after, under 40 ℃ temperature conditions, be immersed in the sodium hydroxide lye that concentration is 240g/L, again after the squeezer squeezing, pulverizing, reaching the fine content of the fine first of alkali is 32%, alkali content is 17%, and density is 180Kg/m
3
Dissolving and back two stages of dissolving just were dissolved in the xanthating machine and carry out at the beginning of dissolution process of the present invention divided, and the dissolving alkali liquid temperature is 3 ℃, after be dissolved in the dissolving machine and carry out, back solution temperature is 10 ℃, dissolution time is 80min.
Spinning process of the present invention is meant: will carry out spinning with spinning machine through the viscose glue of dissolving, deaeration, filtration, and make spinning cake.The temperature of wherein carrying out acid bath is 52 ℃, and the content of acid solution is sulfuric acid 130g/L, sodium sulphate 230g/L, and zinc sulfate 12g/L, total draft are 1.8.
Refining procedure of the present invention is meant: in refining equipment spinning cake is carried out desulfurization, pickling alkali cleaning, bleaches and oils, wherein: desulfurization temperature is 80 ℃, and alkali concn is 8g/L, and pickling temperature is 50 ℃, and concentration is 1g/L, and last oil concentration is 3g/L.
Oven dry of the present invention, become tube, classification packing to be meant: with dryer with spinning cake dry to temperature be 95 ℃, containing and wetly be carried out to tube, classification packing after being not more than 10%.
High performance viscose of the present invention, its dried fracture strength 〉=1.00cN/dtex, wet breaking strength 〉=0.5cN/dtex, dried elongation at break 10～25%, residual sulfur content 20mg/100g.
Claims (7)
1, a kind of high-performance viscose fiber, comprise short rayon fiber peacekeeping viscose filament yarn, it is formulated by following weight percentages: bamboo pulp 1～99%, the cotton pulp dregs of rice 1～99%, perhaps bamboo pulp 199%, wood pulps 1～99%, perhaps bamboo pulp 1～99%, the cotton pulp dregs of rice 1～55%, wood pulps 1～55%.
2, the preparation method of a kind of high-performance viscose fiber according to claim 1, comprise following processing step: mix the dregs of rice, dipping, squeezing, pulverizing, yellow, dissolving, spinning, concise, oven dry and packing, it is characterized in that: described yellow operation comprises wet method intensification yellow method and dry method constant temperature yellow method, and its concrete grammar is as follows:
A, wet method intensification yellow method are meant: in concentration is the carbon disulfide that adds relative alkali fiber weight 26～35% in the pre-alkalizing solution of NaOH of 100～130g/L, and the yellow initial temperature is 12～20 ℃, and whole temperature is 26～34 ℃, and the yellow time is 60～110min.
B, dry method constant temperature yellow method are meant: add the carbon disulfide of relative alkali fiber weight 26～35% in the alkali fiber after concentration is the pre-alkalization of NaOH of 100～130g/L, the yellow temperature constant is at 30～32 ℃, and the yellow time is 30～100min.
3, the preparation method of a kind of high-performance viscose fiber according to claim 2, it is characterized in that: the described mixed dregs of rice, dipping, squeezing, pulverizing process are meant: with bamboo pulp and the cotton pulp dregs of rice or bamboo pulp and wood pulps or bamboo pulp and the cotton pulp dregs of rice, wood pulps mixed according to the above ratio after, under 40～55 ℃ temperature conditions, be immersed in the sodium hydroxide lye that concentration is 220～250g/L, again after the squeezer squeezing, pulverizing, reaching the fine content of the fine first of alkali is 26～32%, alkali content is 15～18%, and density is 150～200Kg/m
3
4, the preparation method of a kind of high-performance viscose fiber according to claim 2, it is characterized in that: dissolving and back two stages of dissolving at the beginning of described dissolution process divides, just be dissolved in the xanthating machine and carry out, the dissolving alkali liquid temperature is lower than 10 ℃, after be dissolved in the dissolving machine and carry out, back solution temperature is 8～25 ℃, and dissolution time is 50～150min.
5, the preparation method of a kind of high-performance viscose fiber according to claim 2 is characterized in that: described spinning process is meant: will carry out spinning with spinning machine through the viscose glue of dissolving, deaeration, filtration, and make spinning cake or staple fibre.Wherein the temperature of acid bath is 44～56 ℃, and the content of acid solution is sulfuric acid 70～140g/L, sodium sulphate 190～330g/L, and zinc sulfate 6～15g/L, total draft are 1.8～2.3.
6, the preparation method of a kind of high-performance viscose fiber according to claim 2, it is characterized in that: described refining procedure is meant: in washing facility to spinning cake or staple fibre carry out desulfurization, with chlorohydric acid pickling with oil, wherein: desulfurization temperature is 30～80 ℃, alkali concn is 2～8g/L, pickling temperature is 20～50 ℃, concentration 1～5g/L, last oil concentration are 2～8g/L.
7, the preparation method of a kind of high-performance viscose fiber according to claim 2, it is characterized in that: this described oven dry, packing process are meant: with dryer with spinning cake or staple fibre dry to temperature be 70～130 ℃, containing and wetly be lower than at 10% o'clock and promptly carry out long filament winder packing or staple fibre weighing packing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200310110937 CN1234923C (en) | 2003-11-17 | 2003-11-17 | High-performance cellulose viscose and process for making same |
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| CN 200310110937 CN1234923C (en) | 2003-11-17 | 2003-11-17 | High-performance cellulose viscose and process for making same |
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| CN1544726A true CN1544726A (en) | 2004-11-10 |
| CN1234923C CN1234923C (en) | 2006-01-04 |
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| CN100355954C (en) * | 2006-05-08 | 2007-12-19 | 宜宾丝丽雅股份有限公司 | Cotton and bamboo composite cellulose pulp and method for producing same |
| CN100449041C (en) * | 2006-05-08 | 2009-01-07 | 宜宾丝丽雅股份有限公司 | Hemp-wood-bamboo composite cellulose pulp and method for producing same |
| CN100449040C (en) * | 2006-05-08 | 2009-01-07 | 宜宾丝丽雅股份有限公司 | Composite cellulose pulp and method for producing same |
| EP2070431A1 (en) * | 2007-12-14 | 2009-06-17 | Le Chameau | Bundle |
| CN1904151B (en) * | 2006-05-08 | 2010-04-14 | 宜宾丝丽雅股份有限公司 | Composite cellulose viscose filament using composite cellulose pulp as raw material made from cotton, wood, hemp and bamboo and its preparation method |
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- 2003-11-17 CN CN 200310110937 patent/CN1234923C/en not_active Expired - Fee Related
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| CN100449041C (en) * | 2006-05-08 | 2009-01-07 | 宜宾丝丽雅股份有限公司 | Hemp-wood-bamboo composite cellulose pulp and method for producing same |
| CN100449040C (en) * | 2006-05-08 | 2009-01-07 | 宜宾丝丽雅股份有限公司 | Composite cellulose pulp and method for producing same |
| CN1904151B (en) * | 2006-05-08 | 2010-04-14 | 宜宾丝丽雅股份有限公司 | Composite cellulose viscose filament using composite cellulose pulp as raw material made from cotton, wood, hemp and bamboo and its preparation method |
| CN100355954C (en) * | 2006-05-08 | 2007-12-19 | 宜宾丝丽雅股份有限公司 | Cotton and bamboo composite cellulose pulp and method for producing same |
| EP2070431A1 (en) * | 2007-12-14 | 2009-06-17 | Le Chameau | Bundle |
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| CN104846455A (en) * | 2015-05-27 | 2015-08-19 | 宜宾丝丽雅集团有限公司 | High-tenacity and low-elongation viscose fibers, as well as preparation method and application thereof |
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| CN1234923C (en) | 2006-01-04 |
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