CN111041567A - Method for manufacturing aluminum-containing viscose fibers - Google Patents
Method for manufacturing aluminum-containing viscose fibers Download PDFInfo
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- CN111041567A CN111041567A CN201911317342.5A CN201911317342A CN111041567A CN 111041567 A CN111041567 A CN 111041567A CN 201911317342 A CN201911317342 A CN 201911317342A CN 111041567 A CN111041567 A CN 111041567A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/06—Wet spinning methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/10—Filtering or de-aerating the spinning solution or melt
- D01D1/103—De-aerating
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/10—Filtering or de-aerating the spinning solution or melt
- D01D1/106—Filtering
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/07—Addition of substances to the spinning solution or to the melt for making fire- or flame-proof filaments
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
- D01F2/08—Composition of the spinning solution or the bath
- D01F2/10—Addition to the spinning solution or spinning bath of substances which exert their effect equally well in either
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Artificial Filaments (AREA)
Abstract
The invention discloses a method for manufacturing aluminum-containing viscose fibers, which comprises the following steps: (1) dissolving sodium metaaluminate in water, and standing for more than 12 hours; (2) carrying out alkalization, aging and yellowing reactions on cellulose pulp to obtain spinning viscose stock solution; (3) adding an aluminum-containing solution into a spinning viscose stock solution, wherein the addition amount of the aluminum-containing solution is 10-35% of the mass of sodium metaaluminate relative to alpha cellulose, uniformly mixing, and filtering and defoaming to obtain an aluminum-containing spinning solution; (4) solidifying and forming the aluminum-containing spinning solution in a solidification bath, wherein the immersion time of the nascent strand in the solidification bath is 1-10 seconds; (5) the method comprises the steps of firstly drawing and refining the primary strand silk, then carrying out curing oiling in a curing bath, wherein the curing bath contains 15-16 wt% of silica sol and 2-10 g/L of oiling agent, and obtaining the aluminum-containing viscose fiber after curing oiling. The preparation method of the invention has simple and convenient process and easy operation, and the prepared flame-retardant fiber has better flame-retardant and heat-resistant effects.
Description
Technical Field
The invention relates to the technical field of flame-retardant viscose fibers, in particular to an aluminum-containing flame-retardant viscose fiber.
Background
With the progress and development of society, the market demand of textile flame retardant materials is increasing, and the requirements on the flame retardant property, the multifunctionality, the environmental protection and the durability of textiles and viscose fibers are also increasing. The viscose fiber has low strength and modulus, is easy to burn to cause fire, and has a limit oxygen index of about 17 percent, thereby causing personal injury and death and property loss when the fire occurs. The flame-retardant fiber at the present stage not only ensures the excellent physical properties of the fiber, but also realizes the characteristics of low smoke, no toxicity, no peculiar smell and the like, so the application performance and the safety performance of the flame-retardant fiber are greatly improved, and the flame-retardant fiber can be widely applied to the fields of civil use, industry, military use and the like. With the improvement of the production process of the viscose fiber, the development of a novel flame retardant and the like, the physical and mechanical properties of the viscose fiber are improved, and the viscose fiber has the characteristics of natural fiber, excellent flame-retardant and fireproof properties and good heat insulation.
Aluminum hydroxide is the largest and most widely used inorganic flame retardant additive. The aluminum hydroxide serving as a flame retardant can not only resist flame, but also prevent smoke generation, does not produce dripping and does not produce toxic gas, so that the aluminum hydroxide is widely applied, the usage amount is increased year by year, and the aluminum hydroxide is widely applied to industries such as thermosetting plastics, thermoplastic plastics, synthetic rubber, coatings, building materials and the like. Meanwhile, the aluminum hydroxide is a white powdery solid which is almost insoluble in water, and can generate suspended matters in condensed water by reacting with alum to adsorb pigments. Therefore, the fiber prepared by the technology can be used as an adsorbent for adsorbing pigments in water and the like.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defects in the prior art, the method for manufacturing the aluminum-containing viscose fiber is provided, and the prepared fiber has good flame retardant effect, good heat resistance, wider application field and low production cost.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a method for manufacturing aluminum-containing viscose fibers comprises the following steps:
(1) preparing an aluminum-containing solution: dissolving sodium metaaluminate in water, and standing for more than 12 hours; preparing 5-50 wt% sodium metaaluminate solution;
(2) preparing a spinning viscose stock solution: carrying out alkalization, aging and yellowing reactions on cellulose pulp to obtain spinning viscose stock solution;
(3) preparing an aluminum-containing spinning solution: adding the aluminum-containing solution into the spinning viscose stock solution, wherein the addition amount of the aluminum-containing solution is 10-35% of the mass of sodium metaaluminate relative to the A cellulose in the spinning viscose stock solution, uniformly mixing, filtering and defoaming to obtain the aluminum-containing spinning solution;
(4) and (3) solidifying and forming of the aluminum-containing viscose: solidifying and forming the aluminum-containing spinning solution in a solidification bath, wherein the spinning speed is 20-50 m/min, and the immersion time of the nascent strand in the solidification bath is 1-10 seconds;
(5) and (3) post-treatment: the method comprises the steps of firstly drawing and refining the primary strand silk, and then curing and oiling the primary strand silk in a curing bath, wherein the temperature of the curing bath is 20-60 ℃, the curing bath contains 15-16 wt% of silica sol and 2-10 g/L of oil, the soaking time in the curing bath is 0.5-2 min, and the aluminum-containing viscose fiber is obtained after curing and oiling.
As an improved technical scheme, the yellowing reaction is to dissolve the alkali cellulose prepared by the alkalization reaction and the aging reaction in a sodium hydroxide solution with the concentration of 15-50 g/l, and then carry out the yellowing reaction with carbon disulfide for 0.5-2.5 hours to generate cellulose sulfonate.
As an improved technical scheme, the filtration adopts a KK filter for filtration, two-pass filtration or three-pass filtration, and the pressure difference between the inlet and the outlet of the KK filter is 180-220 kpa.
As an improved technical scheme, the defoaming adopts a continuous and rapid defoaming method, and the vacuum degree of the defoaming is less than or equal to-99 kPa.
As an improved technical scheme, the temperature of the coagulating bath is 30-60 ℃, and the coagulating bath contains 50-135 g/l of sulfuric acid, 10-30 g/l of zinc sulfate and 200-350 g/l of sodium sulfate.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
the invention relates to a method for preparing aluminum-containing viscose fiber, which comprises the steps of dissolving sodium metaaluminate into an aluminum-containing solution, adding the aluminum-containing solution into a spinning viscose stock solution, dissolving the sodium metaaluminate into water to generate aluminum hydroxide precipitate, reacting the aluminum hydroxide with alkali in the spinning viscose stock solution to generate tetrahydroxy aluminate ([ Al (OH)4] -), and feeding the aluminum-containing spinning solution into a coagulating bath for coagulation forming during spinning forming, wherein the flame retardant components in the obtained fiber mainly comprise aluminum hydroxide and a complex compound thereof. Aluminium hydroxide and complex belong to inorganic flame retardant, are used for viscose fiber for the first time in fire-retardant viscose fiber field, and not only fire-retardant effect is good, and this flame retardant price is low in addition, can greatly reduced manufacturing cost, can remove in the actual production by the popularization, and the practicality is stronger.
In the post-treatment process, the nascent strand is drafted and refined and then solidified and oiled in a solidification bath, the solidification bath contains 15-16 wt% of silica sol and 2-10 g/L of oil agent, the silica sol is soaked in the solidification bath, the bonding fastness of an aluminum compound and fibers can be improved by the silica sol, partial cross-linking effect is generated, the existence rate of flame-retardant components in the fibers is improved, and the solidification and the oiling are carried out simultaneously, so that the solidification effect is further improved.
The preparation method of the aluminum-containing viscose fiber has simple and convenient process and easy operation. The flame-retardant fiber prepared by the preparation method has good flame-retardant and heat-resistant effects, can be used as an adsorbent to adsorb pigments in water, widens the application field of products, and simultaneously can improve the spinnability of subsequent processing, reduce broken ends, prevent flying, improve the yield and increase the economic benefit.
The dry breaking strength of the aluminum-containing viscose fiber prepared by the invention is more than or equal to 1.70CN/dtex, the wet breaking strength is more than or equal to 0.75CN/dtex, and the limiting oxygen index is more than or equal to 26%.
Detailed Description
The invention is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
(1) Dissolving sodium metaaluminate in water, and standing for 12 hours; preparing 10 wt% sodium metaaluminate solution;
(2) dissolving alkali cellulose prepared by alkalizing and ageing cellulose pulp into a sodium hydroxide solution with the concentration of 20g/l, then carrying out yellowing reaction on the alkali cellulose and carbon disulfide for 1.5 hours to generate cellulose sulfonate, and fully dissolving to obtain a spinning viscose stock solution;
(3) adding the aluminum-containing solution into the spinning viscose stock solution, wherein the addition amount of the aluminum-containing solution is 15% of the mass of sodium metaaluminate relative to alpha cellulose, uniformly mixing, and filtering by using a KK filter, wherein the inlet-outlet pressure difference of the KK filter is 190 kpa; then, defoaming by adopting a continuous and rapid defoaming method, wherein the vacuum degree of defoaming is-99 kPa, and defoaming to obtain the aluminum-containing spinning solution;
(4) solidifying and forming the aluminum-containing spinning solution in a solidification bath, wherein the temperature of the solidification bath is 48 ℃, and the solidification bath contains 105g/l of sulfuric acid, 18g/l of zinc sulfate and 250g/l of sodium sulfate; the spinning speed is 30m/min, and the immersion time of the primary strand in the coagulating bath is 7 seconds;
(5) and (2) drafting and refining the nascent strand silk, and then curing and oiling in a curing bath, wherein the temperature of the curing bath is 30 ℃, the curing bath contains 16 wt% of silica sol and 3g/L of oiling agent, the soaking time in the curing bath is 0.5min, and the aluminum-containing viscose fiber is obtained after curing and oiling.
Example 2
(1) Dissolving sodium metaaluminate in water, and standing for 14 hours; preparing 20 wt% sodium metaaluminate solution;
(2) dissolving alkali cellulose prepared by alkalizing and ageing cellulose pulp in a sodium hydroxide solution with the concentration of 30g/l, then carrying out yellowing reaction on the alkali cellulose and carbon disulfide for 2 hours to generate cellulose sulfonate, and fully dissolving to obtain a spinning viscose stock solution;
(3) adding the aluminum-containing solution into the spinning viscose stock solution, wherein the addition amount of the aluminum-containing solution is 25% of the mass of sodium metaaluminate relative to alpha cellulose, uniformly mixing, and filtering by using a KK filter, wherein the inlet-outlet pressure difference of the KK filter is 200 kpa; then, defoaming by adopting a continuous and rapid defoaming method, wherein the vacuum degree of defoaming is-99 kPa, and defoaming to obtain the aluminum-containing spinning solution;
(4) solidifying and forming the aluminum-containing spinning solution in a solidification bath, wherein the temperature of the solidification bath is 50 ℃, and the solidification bath contains 115g/l of sulfuric acid, 15g/l of zinc sulfate and 280g/l of sodium sulfate; the spinning speed is 40m/min, and the immersion time of the primary strand in the coagulating bath is 3 seconds;
(5) the primary strand silk is firstly drafted and refined, then is solidified and oiled in a solidifying bath, the temperature of the solidifying bath is 45 ℃, the solidifying bath contains 15.5 wt% of silica sol and 6g/L of oil agent, the soaking time in the solidifying bath is 1.5min, and the aluminum-containing viscose fiber is obtained after solidification and oiling.
Example 3
(1) Dissolving sodium metaaluminate in water, and standing for 15 hours; preparing 15 wt% sodium metaaluminate solution;
(2) dissolving alkali cellulose prepared by alkalizing and ageing cellulose pulp into a sodium hydroxide solution with the concentration of 40g/l, then carrying out yellowing reaction on the alkali cellulose and carbon disulfide for 1.8 hours to generate cellulose sulfonate, and fully dissolving to obtain a spinning viscose stock solution;
(3) adding the aluminum-containing solution into the spinning viscose stock solution, wherein the addition amount of the aluminum-containing solution is 20% of the mass of sodium metaaluminate relative to alpha cellulose, uniformly mixing, and filtering by using a KK filter, wherein the inlet-outlet pressure difference of the KK filter is 202 kpa; then, defoaming by adopting a continuous and rapid defoaming method, wherein the vacuum degree of defoaming is-99 kPa, and defoaming to obtain the aluminum-containing spinning solution;
(4) solidifying and forming the aluminum-containing spinning solution in a solidification bath, wherein the temperature of the solidification bath is 52 ℃, and the solidification bath contains 125g/l of sulfuric acid, 13g/l of zinc sulfate and 300g/l of sodium sulfate; the spinning speed is 35m/min, and the immersion time of the primary strand in the coagulating bath is 5 seconds;
(5) the primary strand silk is firstly drafted and refined, and then is solidified and oiled in a solidifying bath, the temperature of the solidifying bath is 50 ℃, the solidifying bath contains 15.2 wt% of silica sol and 5g/L of oil agent, the soaking time in the solidifying bath is 1min, and the aluminum-containing viscose fiber is obtained after solidification and oiling.
Comparative example 1
Comparative example 1 differs from example 3 in that in step (5), only the oiling treatment is carried out, the as-spun strand is drawn and refined and then oiled in an oil bath at a temperature of 50 ℃, the oil bath contains 5g/L of oil, the soaking time in the oil bath is 1min, and the aluminum-containing viscose fiber is obtained after oiling.
Comparative example 2
Comparative example 1 differs from example 3 in that in step (5) the curing and oiling are carried out in two steps, the as-spun strand is first drawn, refined and then cured in a curing bath at a temperature of 50 ℃, said curing bath containing 15.2 wt% of silica sol, immersed in said curing bath for a period of 1min, and then oiled in an oiling bath at a temperature of 50 ℃, said oil bath containing 5g/L of oil, immersed in said oil bath for a period of 1min, to obtain said aluminium-containing viscose fiber after oiling.
The physical and mechanical performance indexes and the flame retardant performance of the aluminum-containing viscose fibers prepared in the above examples 1-3 and comparative examples 1-2 after detection are shown in the following table 1.
TABLE 1
It can be seen from table 1 that the physical and mechanical properties, especially the flame retardant properties, of the aluminum-containing viscose fibers obtained by direct oiling without curing are significantly reduced, and when curing and oiling are carried out in two steps, the flame retardant effect is significantly inferior to that of curing and oiling.
Claims (5)
1. The method for manufacturing the aluminum-containing viscose fiber is characterized by comprising the following steps of:
(1) preparing an aluminum-containing solution: dissolving sodium metaaluminate in water, and standing for more than 12 hours;
(2) preparing a spinning viscose stock solution: carrying out alkalization, aging and yellowing reactions on cellulose pulp to obtain spinning viscose stock solution;
(3) preparing an aluminum-containing spinning solution: adding the aluminum-containing solution into the spinning viscose stock solution, wherein the addition amount of the aluminum-containing solution is 10-35% of the mass of sodium metaaluminate relative to the A cellulose in the spinning viscose stock solution, uniformly mixing, filtering and defoaming to obtain the aluminum-containing spinning solution;
(4) and (3) solidifying and forming of the aluminum-containing viscose: solidifying and forming the aluminum-containing spinning solution in a solidification bath, wherein the spinning speed is 20-50 m/min, and the immersion time of the nascent strand in the solidification bath is 1-10 seconds;
(5) and (3) post-treatment: the method comprises the steps of firstly drawing and refining the primary strand silk, and then curing and oiling the primary strand silk in a curing bath, wherein the temperature of the curing bath is 20-60 ℃, the curing bath contains 15-16 wt% of silica sol and 2-10 g/L of oil, the soaking time in the curing bath is 0.5-2 min, and the aluminum-containing viscose fiber is obtained after curing and oiling.
2. The method of manufacturing aluminum-containing viscose fiber according to claim 1, wherein: the yellowing reaction is to dissolve the alkali cellulose prepared by the alkalization reaction and the aging reaction in a sodium hydroxide solution with the concentration of 15-50 g/l, and then carry out the yellowing reaction with carbon disulfide for 0.5-2.5 hours to generate cellulose sulfonate.
3. The method of manufacturing aluminum-containing viscose fiber according to claim 1, wherein: the filtration adopts the KK filter to filter, adopts two to filter or three to filter, the business turn over pressure differential of KK filter is 180 ~ 220 kpa.
4. The method of manufacturing aluminum-containing viscose fiber according to claim 1, wherein: the defoaming adopts a continuous and rapid defoaming method, and the vacuum degree of the defoaming is less than or equal to-99 kPa.
5. The method of manufacturing aluminum-containing viscose fiber according to claim 1, wherein: the temperature of the coagulating bath is 30-60 ℃, and the coagulating bath contains 50-135 g/l of sulfuric acid, 10-30 g/l of zinc sulfate and 200-350 g/l of sodium sulfate.
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| CN201911317342.5A CN111041567A (en) | 2019-12-19 | 2019-12-19 | Method for manufacturing aluminum-containing viscose fibers |
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| CN201911317342.5A CN111041567A (en) | 2019-12-19 | 2019-12-19 | Method for manufacturing aluminum-containing viscose fibers |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5358679A (en) * | 1993-04-21 | 1994-10-25 | Parekh Indubhai H | Manufacture of regenerated cellulosic fiber by zinc free viscose process |
| CN101851804A (en) * | 2010-05-24 | 2010-10-06 | 杭州奥通科技有限公司 | Method for producing fire-retardant anti-melt viscose fibers |
| CN102286799A (en) * | 2011-08-22 | 2011-12-21 | 阜宁澳洋科技有限责任公司 | Fire-retardant viscose fiber and preparation method thereof |
| CN109537285A (en) * | 2018-11-03 | 2019-03-29 | 阜宁澳洋科技有限责任公司 | A kind of manufacturing method of flame retardant viscose fiber |
-
2019
- 2019-12-19 CN CN201911317342.5A patent/CN111041567A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5358679A (en) * | 1993-04-21 | 1994-10-25 | Parekh Indubhai H | Manufacture of regenerated cellulosic fiber by zinc free viscose process |
| CN101851804A (en) * | 2010-05-24 | 2010-10-06 | 杭州奥通科技有限公司 | Method for producing fire-retardant anti-melt viscose fibers |
| CN102286799A (en) * | 2011-08-22 | 2011-12-21 | 阜宁澳洋科技有限责任公司 | Fire-retardant viscose fiber and preparation method thereof |
| CN109537285A (en) * | 2018-11-03 | 2019-03-29 | 阜宁澳洋科技有限责任公司 | A kind of manufacturing method of flame retardant viscose fiber |
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Effective date of registration: 20211206 Address after: 224400 Jiangsu Yancheng Funing high tech Industrial Development Zone Aoyang Avenue Saideli (Yancheng) Fiber Co.,Ltd. Applicant after: Saideli (Yancheng) Fiber Co.,Ltd. Address before: 224400 No.1, Aoyang Avenue, high tech Zone, Funing County, Yancheng City, Jiangsu Province Applicant before: FUNING AOYANG TECHNOLOGY CO.,LTD. |
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Application publication date: 20200421 |
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| RJ01 | Rejection of invention patent application after publication |