CN114318558A - FDY fiber subjected to online alkali reduction treatment and preparation method thereof - Google Patents
FDY fiber subjected to online alkali reduction treatment and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of FDY (fully drawn yarn) production, in particular to a preparation method of FDY fibers subjected to online alkali decrement treatment, which comprises the following specific steps: melt direct spinning or chip spinning is adopted, and the melt direct spinning or chip spinning is extruded by a spinneret plate after being metered, and then the melt direct spinning or chip spinning is cooled, is subjected to yarn gathering and pre-networking, enters a channel, is subjected to heat setting, oiling and main networking and then is wound by a winding machine; and spraying a hydrolysate into the tows in the pre-network process, wherein the hydrolysate is an alkali liquor with the pH value of 8-9.5. The invention also discloses the FDY fiber subjected to online alkali decrement treatment, and the FDY fiber is prepared by adopting the preparation method. According to the FDY fiber subjected to online alkali weight reduction treatment and the preparation method thereof, the obtained FDY fiber can have good fluffiness without alkali weight reduction post-treatment after being made into a fabric, so that the post-treatment process can be reduced, and the energy consumption can be reduced.
Description
Technical Field
The invention relates to the technical field of FDY (fully drawn yarn) production, in particular to FDY fibers subjected to online alkali decrement treatment and a preparation method thereof.
Background
With the aggravation of energy crisis, spinning as a traditional high-energy-consumption enterprise is bound to be strictly limited, and therefore, how to create higher output value in limited energy becomes a target of enterprise dispute research. Meanwhile, the traditional polyester fabric sold in the market has rough hand feeling and poor touch feeling, can have basic clothes performance only through a series of after-treatments such as heat setting, alkali decrement and the like, consumes a large amount of energy and has high cost.
Disclosure of Invention
The invention provides the FDY fiber subjected to the online alkali weight reduction treatment and the preparation method thereof, aiming at solving the technical defects, and the obtained FDY fiber has better fluffiness and can be free from the subsequent alkali weight reduction treatment.
The invention discloses a preparation method of FDY fiber subjected to online alkali decrement treatment, which comprises the following specific steps: melt direct spinning or chip spinning is adopted, and the melt direct spinning or chip spinning is extruded by a spinneret plate after being metered, and then the melt direct spinning or chip spinning is cooled, is subjected to yarn gathering and pre-networking, enters a channel, is subjected to heat setting, oiling and main networking and then is wound by a winding machine; and spraying a hydrolysate into the tows in the pre-network process, wherein the hydrolysate is an alkali liquor with the pH value of 8-9.5.
In the scheme, the hydrolysate is sprayed into the tows in the pre-networking process, the pH value of the hydrolysate is 8-9.5, the hydrolysate can be attached to the tows in the spinning stage, and the hydrolysate is diffused into the fibers when the fibers are heated to the vitrification temperature in the subsequent heat setting process, so that the excellent alkali reduction effect is achieved, the fibers are endowed with excellent fluffy performance, meanwhile, the subsequent alkali reduction post-treatment process of the grey cloth can be omitted, and the low-carbon and energy-saving effect is achieved. Wherein the pH of the hydrolysate can be adjusted within the above range according to the monofilament linear density of the produced FDY fiber.
The concentration of the hydrolysate is 0.3-0.5g/L, and the spraying amount of the hydrolysate is 2-5 ml/min. Wherein the spraying amount of the hydrolysate is controlled within the range, and is inversely proportional to the monofilament fineness of the FDY fiber and directly proportional to the decitex of the FDY fiber.
The hydrolysate is an alkali liquor prepared from sodium hydroxide or sodium carbonate by desalted water. The hydrolysate is prepared from alkali liquor prepared from desalted water of sodium hydroxide and sodium carbonate due to the comprehensive consideration of the solubility and corrosivity of the alkali liquor.
The pH value of the FDY oiling agent adopted in the oiling process is 5.5-6.5. The FDY oiling agent is added with 0.1-0.8% of citric acid, so that the FDY oiling agent has certain acidity, the hydrolysate can be neutralized, excessive corrosion of the hydrolysate to FDY fibers is avoided, the FDY oiling agent with the pH value can maintain good stability, and the FDY oiling agent is stored in a room at 30 ℃ for 6 months, and the content attenuation of the FDY oiling agent is maintained below 20%.
The structure of the pre-network device used in the pre-network process is as follows: including the mounting bracket, be provided with the seal wire ceramic chip respectively in the upper end and the lower extreme of mounting bracket, be provided with wire guide groove or wire guide hole on the seal wire ceramic chip, set up hydrojet mouth and network air cock on the mounting bracket between the seal wire ceramic chip, hydrojet mouth is located the top of network air cock, all be provided with wire guide hole or the wire guide groove that supplies the pencil to pass on hydrojet mouth and the network air cock, wire guide groove or the wire guide hole on hydrojet mouth, network air cock and the seal wire ceramic chip form a vertical seal wire passageway, are provided with the hydrojet mouth on hydrojet mouth, hydrojet mouth and seal wire passageway intercommunication are provided with the gas outlet on the network air cock, gas outlet and seal wire passageway intercommunication. In the pre-network process, the tows penetrate through the guide wire channels in the guide wire ceramic chip, the liquid spraying nozzle, the network air nozzle and the guide wire ceramic chip, hydrolysate is sprayed onto the tows by the liquid spraying nozzle in the process, and high-pressure air impacts the tows when passing through the network air nozzle, so that the tows can be fluffier, and meanwhile, the hydrolysate can be better dispersed on fibers of the tows.
The liquid spraying opening on the liquid spraying nozzle is connected to the hydrolysis liquid barrel through a pipeline, and a hydrolysis liquid pump is arranged on the pipeline. The spraying amount of the hydrolysate can be controlled by the rotating speed of the hydrolysate pump, and the output amount of the hydrolysate can be determined.
The invention also discloses the FDY fiber subjected to online alkali deweighting treatment, which is prepared by the preparation method, the monofilament linear density of the obtained FDY fiber is between 2.2 and 6.5dtex, the breaking strength is higher than 3.7cn/dtex, the elongation at break is between 22 and 28 percent, and the compression ratio work of the woven fabric is between 0.20 and 0.80n.cm/cm2。
According to the FDY fiber subjected to online alkali weight reduction treatment and the preparation method thereof, the obtained FDY fiber can have good fluffiness without alkali weight reduction post-treatment after being made into a fabric, so that the post-treatment process can be reduced, and the energy consumption can be reduced.
Drawings
FIG. 1 is a perspective view of the structure at the mounting frame of the pre-net apparatus of the present invention;
fig. 2 is a schematic structural diagram of a pre-network device according to the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
Example 1:
the invention discloses a preparation method of FDY fiber subjected to online alkali decrement treatment, which comprises the following specific steps: melt direct spinning or chip spinning is adopted, and the melt direct spinning or chip spinning is extruded by a spinneret plate after being metered, and then the melt direct spinning or chip spinning is cooled, is subjected to yarn gathering and pre-networking, enters a channel, is subjected to heat setting, oiling and main networking and then is wound by a winding machine; and spraying a hydrolysate into the tows in the pre-network process, wherein the hydrolysate is an alkali liquor with the pH value of 8-9.5.
The melt direct spinning, slice spinning and spinning, cooling, filament gathering, heat setting, main networking, winding and the like are all the prior art, and the specific forms of the steps are not limited in the application. According to the method, only the step of spraying the hydrolysate is added in the pre-networking process, and the acidic FDY oiling agent is adopted in the oiling process.
The concentration of the hydrolysate is 0.3-0.5g/L, and the spraying amount of the hydrolysate is 2-5 ml/min.
The hydrolysate is an alkali liquor prepared from sodium hydroxide or sodium carbonate by desalted water.
The pH value of the FDY oiling agent adopted in the oiling process is 5.5-6.5.
The structure of the pre-network device used in the pre-network process is as follows: including mounting bracket 1, be provided with seal wire ceramic chip 2 respectively in the upper end and the lower extreme of mounting bracket 1, be provided with seal wire groove 5 on the seal wire ceramic chip 2, set up hydrojet 3 and network air cock 4 on mounting bracket 1 between seal wire ceramic chip 2, hydrojet 3 is located the top of network air cock 4, all be provided with the seal wire groove 5 that supplies the pencil to pass on hydrojet 3 and the network air cock 4, the seal wire groove 5 on hydrojet 3, network air cock 4 and the seal wire ceramic chip 2 forms a vertical seal wire passageway, is provided with hydrojet 6 on hydrojet 3, hydrojet 6 and seal wire passageway intercommunication are provided with gas outlet 7 on network air cock 4, gas outlet 7 and seal wire passageway intercommunication.
The liquid spraying port 6 on the liquid spraying nozzle 3 is connected to the hydrolytic liquid barrel 8 through a pipeline 10, and a hydrolytic liquid pump 9 is arranged on the pipeline 10. The spraying amount of the hydrolysate can be controlled by the rotating speed of the hydrolysate pump 9, and the output amount of the hydrolysate can be determined.
Specifically, the method comprises the following steps: melt direct spinning or chip spinning is adopted, the melt flow is set to be 30.24g/min, the hydrolysate flow is set to be 3.9ml/min, the oiling agent flow is set to be 16.5ml/min, and the winding speed is 4500 m/min. Wherein the concentration of the hydrolysate is as follows: 0.3-0.5g/L, the pH value of the hydrolysate is as follows: 8.2, the pH value of the FDY oiling agent is as follows: 6.3. The melt is extruded from a spinneret after being accurately measured, is cooled by circular blowing, is infected with hydrolysis liquid with the pH value of 8.2 by a pre-network and then is led into a channel, is stretched and shaped by a guide roller, a preheating roller and a high-temperature roller, is added with oil solution compound liquid with the pH value of 6.3, is adjusted at the roller speed of 4500m/min to maintain certain tension and ensure good package forming effect, can produce FDY fiber of 83dtex/36F, and has the monofilament linear density of 2.30dtex, the breaking strength of 3.85cn/dtex and the breaking elongation of 25.34 percent, and the compression ratio of woven fabric is 0.42n cm/cm2。
The invention also discloses the FDY fiber subjected to online alkali decrement treatment, and the FDY fiber is prepared by adopting the preparation method.
Example 2:
the invention discloses a preparation method of FDY fiber subjected to online alkali decrement treatment, which comprises the following specific steps: melt direct spinning or chip spinning is adopted, and the melt direct spinning or chip spinning is extruded by a spinneret plate after being metered, and then the melt direct spinning or chip spinning is cooled, is subjected to yarn gathering and pre-networking, enters a channel, is subjected to heat setting, oiling and main networking and then is wound by a winding machine; and spraying a hydrolysate into the tows in the pre-network process, wherein the hydrolysate is an alkali liquor with the pH value of 8-9.5.
The concentration of the hydrolysate is 0.3-0.5g/L, and the spraying amount of the hydrolysate is 2-5 ml/min.
The hydrolysate is an alkali liquor prepared from sodium hydroxide or sodium carbonate by desalted water.
The pH value of the FDY oiling agent adopted in the oiling process is 5.5-6.5.
The structure of the pre-network device used in the pre-network process is as follows: including mounting bracket 1, be provided with seal wire ceramic chip 2 respectively in the upper end and the lower extreme of mounting bracket 1, be provided with seal wire groove 5 on the seal wire ceramic chip 2, set up hydrojet 3 and network air cock 4 on mounting bracket 1 between seal wire ceramic chip 2, hydrojet 3 is located the top of network air cock 4, all be provided with the seal wire groove 5 that supplies the pencil to pass on hydrojet 3 and the network air cock 4, the seal wire groove 5 on hydrojet 3, network air cock 4 and the seal wire ceramic chip 2 forms a vertical seal wire passageway, is provided with hydrojet 6 on hydrojet 3, hydrojet 6 and seal wire passageway intercommunication are provided with gas outlet 7 on network air cock 4, gas outlet 7 and seal wire passageway intercommunication.
The liquid spraying port 6 on the liquid spraying nozzle 3 is connected to the hydrolytic liquid barrel 8 through a pipeline 10, and a hydrolytic liquid pump 9 is arranged on the pipeline 10. The spraying amount of the hydrolysate can be controlled by the rotating speed of the hydrolysate pump 9, and the output amount of the hydrolysate can be determined.
Specifically, the method comprises the following steps: melt direct spinning or chip spinning is adopted, the melt flow is set to be 21.89g/min, the hydrolysate flow is set to be 3.2ml/min, the oiling agent flow is set to be 14.3ml/min, and the winding speed is 4500 m/min. Wherein the concentration of the hydrolysate is as follows: 0.3g/L, the pH value of the hydrolysate is as follows: 8.1, the pH value of the FDY oiling agent is as follows: 6.5. the melt is extruded from a spinneret after being accurately measured, is cooled by circular air blowing, is infected with hydrolysis liquid with the pH value of 8.1 by a pre-network and then is led into a channel, is stretched and shaped by a guide roller, a preheating roller and a high-temperature roller, is added with oil solution compound liquid with the pH value of 6.5, is adjusted at the roller speed of 4500m/min to maintain certain tension and ensure good package forming effect, can produce 61dtex/24F FDY fiber, the monofilament linear density of which is 2.54dtex, the breaking strength of which is 3.92cn/dtex, the breaking elongation of which is 26.24 percent, and the compression ratio of woven fabric is 0.55n cm/cm2。
The invention also discloses the FDY fiber subjected to online alkali decrement treatment, and the FDY fiber is prepared by adopting the preparation method.
Example 3:
the invention discloses a preparation method of FDY fiber subjected to online alkali decrement treatment, which comprises the following specific steps: melt direct spinning or chip spinning is adopted, and the melt direct spinning or chip spinning is extruded by a spinneret plate after being metered, and then the melt direct spinning or chip spinning is cooled, is subjected to yarn gathering and pre-networking, enters a channel, is subjected to heat setting, oiling and main networking and then is wound by a winding machine; and spraying a hydrolysate into the tows in the pre-network process, wherein the hydrolysate is an alkali liquor with the pH value of 8-9.5.
The concentration of the hydrolysate is 0.3-0.5g/L, and the spraying amount of the hydrolysate is 2-5 ml/min.
The hydrolysate is an alkali liquor prepared from sodium hydroxide or sodium carbonate by desalted water.
The pH value of the FDY oiling agent adopted in the oiling process is 5.5-6.5.
The structure of the pre-network device used in the pre-network process is as follows: including mounting bracket 1, be provided with seal wire ceramic chip 2 respectively in the upper end and the lower extreme of mounting bracket 1, be provided with seal wire groove 5 on the seal wire ceramic chip 2, set up hydrojet 3 and network air cock 4 on mounting bracket 1 between seal wire ceramic chip 2, hydrojet 3 is located the top of network air cock 4, all be provided with the seal wire groove 5 that supplies the pencil to pass on hydrojet 3 and the network air cock 4, the seal wire groove 5 on hydrojet 3, network air cock 4 and the seal wire ceramic chip 2 forms a vertical seal wire passageway, is provided with hydrojet 6 on hydrojet 3, hydrojet 6 and seal wire passageway intercommunication are provided with gas outlet 7 on network air cock 4, gas outlet 7 and seal wire passageway intercommunication.
The liquid spraying port 6 on the liquid spraying nozzle 3 is connected to the hydrolytic liquid barrel 8 through a pipeline 10, and a hydrolytic liquid pump 9 is arranged on the pipeline 10. The spraying amount of the hydrolysate can be controlled by the rotating speed of the hydrolysate pump 9, and the output amount of the hydrolysate can be determined.
Specifically, the method comprises the following steps: melt direct spinning or chip spinning is adopted, the melt flow is set to be 26.54g/min, the hydrolysate flow is set to be 4.1ml/min, the oiling agent flow is set to be 15.8ml/min, and the winding speed is 4500 m/min. Wherein the concentration of the hydrolysate is as follows: 0.35g/L, the pH value of the hydrolysate is as follows: 8.5, the pH value of the FDY oiling agent is as follows: 6.0. fusion furnaceThe body is extruded from a spinneret plate after being accurately measured, then is cooled by circular air blowing, is infected with hydrolysis liquid with the pH value of 8.5 by a pre-network and then is led into a channel, is stretched and shaped by a guide roller, a preheating roller and a high-temperature roller, is added with oil solution compound liquid with the pH value of 6.0, is adjusted at the roller speed of 4500m/min to maintain certain tension and ensure good package forming effect, can produce FDY fiber with 73dtex/24F, and has the monofilament linear density of 3.04dtex, the breaking strength of 3.99cn/dtex and the breaking elongation of 27.44 percent, and the compression ratio of woven fabric is 0.40n.cm/cm2。
The invention also discloses the FDY fiber subjected to online alkali decrement treatment, and the FDY fiber is prepared by adopting the preparation method.
Example 4:
the invention discloses a preparation method of FDY fiber subjected to online alkali decrement treatment, which comprises the following specific steps: melt direct spinning or chip spinning is adopted, and the melt direct spinning or chip spinning is extruded by a spinneret plate after being metered, and then the melt direct spinning or chip spinning is cooled, is subjected to yarn gathering and pre-networking, enters a channel, is subjected to heat setting, oiling and main networking and then is wound by a winding machine; and spraying a hydrolysate into the tows in the pre-network process, wherein the hydrolysate is an alkali liquor with the pH value of 8-9.5.
The concentration of the hydrolysate is 0.3-0.5g/L, and the spraying amount of the hydrolysate is 2-5 ml/min.
The hydrolysate is an alkali liquor prepared from sodium hydroxide or sodium carbonate by desalted water.
The pH value of the FDY oiling agent adopted in the oiling process is 5.5-6.5.
The structure of the pre-network device used in the pre-network process is as follows: including mounting bracket 1, be provided with seal wire ceramic chip 2 respectively in the upper end and the lower extreme of mounting bracket 1, be provided with seal wire groove 5 on the seal wire ceramic chip 2, set up hydrojet 3 and network air cock 4 on mounting bracket 1 between seal wire ceramic chip 2, hydrojet 3 is located the top of network air cock 4, all be provided with the seal wire groove 5 that supplies the pencil to pass on hydrojet 3 and the network air cock 4, the seal wire groove 5 on hydrojet 3, network air cock 4 and the seal wire ceramic chip 2 forms a vertical seal wire passageway, is provided with hydrojet 6 on hydrojet 3, hydrojet 6 and seal wire passageway intercommunication are provided with gas outlet 7 on network air cock 4, gas outlet 7 and seal wire passageway intercommunication.
The liquid spraying port 6 on the liquid spraying nozzle 3 is connected to the hydrolytic liquid barrel 8 through a pipeline 10, and a hydrolytic liquid pump 9 is arranged on the pipeline 10. The spraying amount of the hydrolysate can be controlled by the rotating speed of the hydrolysate pump 9, and the output amount of the hydrolysate can be determined.
Specifically, the method comprises the following steps: melt direct spinning or chip spinning is adopted, the melt flow is set to be 40.46g/min, the hydrolysate flow is set to be 4.7ml/min, the oiling agent flow is set to be 15.8ml/min, and the winding speed is 4500 m/min. Wherein the concentration of the hydrolysate is as follows: 0.4g/L, the pH value of the hydrolysate is as follows: 9.0, the pH value of the FDY oiling agent is as follows: 5.7. the melt is extruded from a spinneret after being accurately measured, is cooled by circular air blowing, is infected by hydrolysis liquid with the pH value of 9.0 through a pre-network and then is guided into a channel, is stretched and shaped by a guide roller, a preheating roller and a high-temperature roller, is added with oil solution compound liquid with the pH value of 5.7, is adjusted at the roller speed of 4500m/min to maintain certain tension and ensure good package forming effect, can produce 111dtex/48F FDY fiber, and has the monofilament linear density of 2.31dtex, the breaking strength of 3.82cn/dtex and the breaking elongation of 26.05 percent, and the compression ratio of woven fabric is 0.46n.cm/cm2。
The invention also discloses the FDY fiber subjected to online alkali decrement treatment, and the FDY fiber is prepared by adopting the preparation method.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; they may be directly connected or indirectly connected through intervening media, or may be in the interactive relationship of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but may be embodied or carried out in various forms without departing from the spirit and scope of the invention.
Claims (7)
1. A preparation method of FDY fiber subjected to online alkali deweighting treatment is characterized by comprising the following steps: the specific process is as follows: melt direct spinning or chip spinning is adopted, and the melt direct spinning or chip spinning is extruded by a spinneret plate after being metered, and then the melt direct spinning or chip spinning is cooled, is subjected to yarn gathering and pre-networking, enters a channel, is subjected to heat setting, oiling and main networking and then is wound by a winding machine; and spraying a hydrolysate into the tows in the pre-network process, wherein the hydrolysate is an alkali liquor with the pH value of 8-9.5.
2. The method for preparing FDY fiber by on-line alkali deweighting treatment as claimed in claim 1, wherein the method comprises the following steps: the concentration of the hydrolysate is 0.3-0.5g/L, and the spraying amount of the hydrolysate is 2-5 ml/min.
3. The method for preparing FDY fiber by online alkali deweighting treatment as claimed in claim 2, wherein the method comprises the following steps: the hydrolysate is an alkali liquor prepared from sodium hydroxide or sodium carbonate by desalted water.
4. The method for preparing FDY fiber subjected to online alkali weight reduction treatment according to claim 1, wherein the pH value of an FDY oiling agent adopted in the oiling process is 5.5-6.5.
5. The method for preparing FDY fiber by online alkali deweighting treatment according to any one of claims 1 to 4, wherein the method comprises the following steps: the structure of the pre-network device used in the pre-network process is as follows: including the mounting bracket, be provided with the seal wire ceramic chip respectively in the upper end and the lower extreme of mounting bracket, be provided with wire guide groove or wire guide hole on the seal wire ceramic chip, set up hydrojet mouth and network air cock on the mounting bracket between the seal wire ceramic chip, hydrojet mouth is located the top of network air cock, all be provided with wire guide hole or the wire guide groove that supplies the pencil to pass on hydrojet mouth and the network air cock, wire guide groove or the wire guide hole on hydrojet mouth, network air cock and the seal wire ceramic chip form a vertical seal wire passageway, are provided with the hydrojet mouth on hydrojet mouth, hydrojet mouth and seal wire passageway intercommunication are provided with the gas outlet on the network air cock, gas outlet and seal wire passageway intercommunication.
6. The method for preparing FDY fiber by online alkali deweighting treatment as claimed in claim 5, wherein the method comprises the following steps: the liquid spraying opening on the liquid spraying nozzle is connected to the hydrolysis liquid barrel through a pipeline, and a hydrolysis liquid pump is arranged on the pipeline.
7. An FDY fiber subjected to online alkali weight reduction treatment is characterized in that: the FDY fiber is prepared by the preparation method of any one of claims 1 to 4.
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| CN103835021A (en) * | 2014-03-07 | 2014-06-04 | 余燕平 | Preparation method of easily-degradable fibers with controllable degradation conditions and no formaldehyde residue |
| CN111805992A (en) * | 2020-07-21 | 2020-10-23 | 广东洪兴实业股份有限公司 | Skin-friendly breathable double-layer velvet cotton fabric and preparation method thereof |
| CN112796004A (en) * | 2020-12-31 | 2021-05-14 | 宁波三邦超细纤维有限公司 | Micron silk composite superfine fiber and preparation method thereof |
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