CN112176454B - Colored polylactic acid tow and preparation method thereof - Google Patents
Colored polylactic acid tow and preparation method thereof Download PDFInfo
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- CN112176454B CN112176454B CN202010946170.4A CN202010946170A CN112176454B CN 112176454 B CN112176454 B CN 112176454B CN 202010946170 A CN202010946170 A CN 202010946170A CN 112176454 B CN112176454 B CN 112176454B
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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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
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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
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
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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
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/06—Washing or drying
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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
- D01D5/12—Stretch-spinning methods
- D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
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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
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/34—Core-skin structure; Spinnerette packs therefor
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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
- 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
- D01F1/04—Pigments
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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
- 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
- D01F1/10—Other agents for modifying properties
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Abstract
The invention provides a colored polylactic acid tow, which comprises a material A and a material B; the material A comprises the following components in percentage by mass: 45 to 70 weight percent of crystalline polylactic acid and 0.02 to 0.2 weight percent of nucleating agent; the material B comprises the following components in percentage by mass: 26 to 45 weight percent of non-crystalline polylactic acid, 3.75 to 9.88 weight percent of color fixing material and 0.05 to 0.1 weight percent of pigment. The invention also discloses a preparation method of the colored polylactic acid tow, and the colored polylactic acid tow has good heat resistance and excellent coloring performance and color retention.
Description
Technical Field
The invention belongs to the technical field of chemical materials, and particularly relates to a colored polylactic acid tow and a preparation method of the colored polylactic acid tow.
Background
Polylactic acid (PLA) is a biodegradable novel material, and is prepared from renewable crop starch (such as starch of corn, cassava, sugarcane and the like) as a raw material, the PLA has good biodegradability, and finally, degradation products are carbon dioxide and water after the PLA is used and subjected to natural degradation processes such as composting and the like, so that the PLA does not pollute the environment, does not consume high energy, and does not additionally generate carbon dioxide.
At present, polylactic acid is widely applied in fiber textile industry, such as manufacturing non-woven fabrics, health care fabrics, carpets and the like. With the increasing requirements of people on product differentiation, functionalization and diversification, colored polylactic acid fiber tows are also under development, and the colored polylactic acid fiber tows are mainly realized by pigment blending and dye dyeing at present. However, in the blended pigment spinning method, because the compatibility of the pigment and the resin matrix of the polylactic acid is poor, the color dispersion is uneven, and a large amount of pigment is needed to obtain the tows with uniform color dispersion, the mechanical properties and other properties of the polylactic acid tows are greatly reduced.
Disclosure of Invention
The first purpose of the invention is to provide a colored polylactic acid tow.
The second purpose of the invention is to provide a preparation method of the colored polylactic acid tow.
The first purpose of the invention is realized by the following technical scheme:
a colored polylactic acid tow comprises a material A and a material B;
the material A comprises the following components in percentage by mass: 45 wt% -70 wt% of crystalline polylactic acid and 0.02 wt% -0.2 wt% of nucleating agent;
the material B comprises the following components in percentage by mass: 26 to 45 weight percent of non-crystalline polylactic acid, 3.75 to 9.88 weight percent of color fixing material and 0.05 to 0.1 weight percent of pigment.
Further, the colored polylactic acid tow is of a skin-core structure, the material A serves as a core layer of the skin-core structure, and the material B serves as a skin layer of the skin-core structure. According to the invention, the pigment is directly added into the skin layer material, and the color fixing material improves the dispersibility of the pigment in the skin layer material, so that the color of the polylactic acid filament bundle is firm and bright finally. Through such setting, can realize that skin layer structure has the colour, and core layer structure does not have the colour to bring special outward appearance and visual perception for polylactic acid silk bundle.
Furthermore, the cross section shape of the core-skin structure tow comprises a cross-shaped, an X-shaped, an H-shaped or core-skin-like structure and the like.
Furthermore, the crystallinity of the crystalline polylactic acid is 40-55%, the melt index is 15-40 g/10min (200 ℃, 2.16kg), and the melting temperature is 175-215 ℃.
Furthermore, the crystallinity of the non-crystalline polylactic acid is 5-10%, the melt index is 15-35 g/10min (200 ℃, 2.16kg), and the melting temperature is 135-150 ℃.
The crystalline polylactic acid can be selected from one or more polylactic acids with crystallinity and/or melt index. Similarly, the non-crystalline polylactic acid may be selected from one or more of the crystallinity and/or melt index of polylactic acid. The higher the crystallinity, the better the heat resistance of the product, and the corresponding processing temperature is high. The melt index is an important index for ensuring the normal running of the spinning process: the invention respectively selects polylactic acid materials with different crystallinities and melt indexes through the skin layer structure and the core layer structure to prepare the skin-core structure polylactic acid filament bundle with excellent heat resistance.
Further, the nucleating agent comprises at least one of nano silicon dioxide, nano titanium dioxide, graphene and carbon nano tubes. The nucleating agent can increase the crystallization speed and the crystallinity of the polylactic acid of the core layer and improve the heat resistance.
Further, the color fixing material comprises a methacrylate polymer.
Further, the fixing material includes methyl methacrylate-isooctyl acrylate copolymer, methyl methacrylate-ethyl methacrylate copolymer, methyl methacrylate-methacrylic acid copolymer, methyl methacrylate-butyl methacrylate, methyl methacrylate-hydroxyethyl methacrylate copolymer, methyl methacrylate-hydroxybutyl methacrylate copolymer, and the like. The color fixing material can increase the combination fastness of the coloring agent and the polylactic resin and has the function of adjusting the color brightness.
Furthermore, the single denier of the filament bundle is 1.0-15 dtex.
Further, the coloring agent is one of titanium dioxide, carbon black, iron oxide red, iron oxide yellow, phthalocyanine blue and phthalocyanine green.
For polylactic acid tow for food grade use, the colorant is a food grade dye.
The second purpose of the invention is realized by the following technical scheme:
a preparation method of colored polylactic acid tows comprises the following steps:
s1) taking materials according to the raw material ratio, and preparing polylactic acid nascent tows;
s2) drawing the nascent tow obtained in S1) to obtain a colored polylactic acid tow.
Further, the specific process for preparing the polylactic acid nascent tow comprises the following steps: mixing the material A and the material B according to a predetermined proportion, and placing the mixture in a screw extruder for extrusion; then oiling, winding and collecting the primary tows.
Further, the specific process for preparing polylactic acid nascent tow in S1 includes: mixing the material A serving as a core layer according to a set proportion, mixing the material B serving as a skin layer according to a set proportion, and respectively putting the mixed material A and the mixed material B into different screw extruders to extrude a semi-finished product with a skin-core structure; then oiling, winding and collecting the primary tows.
Further, the extrusion conditions of the screw extruder are set as follows: the screw temperature is set in a gradient way at 170-235 ℃, the filter temperature is 235-245 ℃, the spinneret plate is 230-250 ℃, the cooling temperature is 10-40 ℃, and the traction speed is 500-1200 m/min.
Further, the method also comprises the step of drying the material A and/or the material B.
Preferably, the drying process is that the material A is placed in a vacuum drum dryer at 80 ℃ to be rotated and dried for 12 hours, then is cooled to be below 45 ℃, and is placed in a screw extruder to be extruded; and (3) placing the material B in a vacuum drum dryer at 60 ℃ for rotating and drying for 24h, cooling to below 45 ℃, and then placing in a screw extruder for extrusion.
Further, drafting the primary tows in S2, including bundling the primary tows, carrying out water bath drafting at a speed of 100 m/min-250 m/min, using water as a heating medium, carrying out water bath at 68-72 ℃ for the first time, carrying out water bath at 72-76 ℃ for the second time, and carrying out drafting total times of 2.5-4 times, then carrying out steam pre-shaping, carrying out water cooling curling, and drying the tows to obtain the colored polylactic acid tows.
Preferably, the number of crimped tows is 23-30/25 mm.
Preferably, the tows are dried at the temperature of 58-70 ℃.
Compared with the prior art, the invention has the following beneficial effects:
(1) the colored polylactic acid tow has good heat resistance and excellent coloring performance and color retention, does not fade or fade after being soaked in hot water at 50-80 ℃ for 12-24 h, and has the fiber tow shrinkage rate of less than 0.5%.
(2) The polylactic acid tow can be widely applied to the industries of clothes, non-woven fabrics, tobacco and the like, and can effectively improve the differentiation, the functionalization and the diversification of products.
Drawings
FIG. 1 is a cross sheath-core structured tow of colored polylactic acid according to the present invention;
FIG. 2 is a cross sheath-core structured tow of colored polylactic acid according to the present invention;
FIG. 3 shows a colored H-shaped sheath-core tow of polylactic acid according to the present invention;
FIG. 4 shows a colored H-shaped sheath-core tow of polylactic acid according to the present invention;
the reference numbers in the figures are as follows: 1-skin layer structure and 2-core layer structure.
Detailed Description
The present invention is further described below in conjunction with specific examples to better understand and implement the technical solutions of the present invention for those skilled in the art.
Example 1
A preparation method of colored polylactic acid tows comprises the following steps:
1) preparing the primary raw silk: mixing 60 parts of polylactic acid (with the crystallinity of 40 percent and the melt index of 40g/10min) consisting of the core layer and 0.1 part of nano silicon dioxide, placing the mixture in a vacuum drum dryer at the temperature of 80 ℃, drying the mixture for 12 hours in a rotating manner, cooling the mixture to the temperature below 45 ℃, and discharging the mixture into a hopper of a single-screw extruder; mixing 35 parts of polylactic acid (with the crystallinity of 5 percent and the melt index of 20g/10min) composed of a skin layer, 4.85 parts of methyl methacrylate-isooctyl acrylate copolymer and 0.05 part of carbon black, placing the mixture in a vacuum drum dryer at the temperature of 60 ℃, drying the mixture for 24 hours in a rotating manner, cooling the mixture to the temperature below 45 ℃, and discharging the mixture into a hopper of another single-screw extruder; the screw temperature is 185-.
2) Preparing post-spun drawn colored tows: the nascent tows are reasonably bundled according to the requirements, the water bath drafting speed is 150m/min, the heating medium is water, the temperature of the first water bath is 70 ℃, the temperature of the second water bath is 74 ℃, the drafting total multiple is 3 times, the polylactic acid tows are preformed by water vapor, curled by water cooling and curled in the number of 27/25 mm, and the colored polylactic acid tows with the skin-core structure are obtained after drying at 65 ℃, as shown in figure 1, the colored polylactic acid tows with the skin-core structure comprise a skin layer structure 1 and a core layer structure 2.
Comparative example 1
A method of making a colored polylactic acid tow, this comparative example being different from example 1 in that:
the core layer comprises: 60 parts of polylactic acid (crystallinity 40%, melt index 40g/10 min);
the cortex layer comprises: 39.95 parts of polylactic acid (crystallinity: 5%, melt index: 20g/10min), 0.05 part of carbon black.
Example 2
The difference between the preparation method of the colored polylactic acid tow and the embodiment 1 is as follows:
the core layer comprises: 70 parts of polylactic acid (with the crystallinity of 40 percent and the melt index of 30g/10min), 0.08 part of graphene;
the cortex layer comprises: 22 parts of polylactic acid (the crystallinity is 10 percent, and the melt index is 30g/10min), 7.82 parts of methyl methacrylate-ethyl methacrylate copolymer and 0.1 part of titanium dioxide.
Comparative example 2
A method of making a colored polylactic acid tow, this comparative example being different from example 2 in that:
the core layer comprises: 70 parts of polylactic acid (the crystallinity is 40 percent, and the melt index is 30g/10 min);
the skin layer comprises: 29.9 parts of polylactic acid (the crystallinity is 10 percent and the melt index is 30g/10min) and 0.1 part of titanium dioxide.
Example 3
A preparation method of colored polylactic acid tows comprises the following steps:
1) preparing the primary raw silk: mixing 45 parts of polylactic acid (with the crystallinity of 55 percent and the melt index of 35g/10min) and 0.06 part of graphene, placing the mixture in a vacuum drum dryer at the temperature of 80 ℃, drying the mixture for 12 hours in a rotating manner, cooling the mixture to the temperature below 45 ℃, and discharging the mixture into a hopper of a single-screw extruder; mixing 45 parts of polylactic acid (with the crystallinity of 5 percent and the melt index of 25g/10min) composed of a skin layer, 9.88 parts of methyl methacrylate-methacrylic acid copolymer and 0.06 part of iron oxide red, placing the mixture in a vacuum drum dryer at 60 ℃ for rotating and drying for 24 hours, cooling to the temperature below 45 ℃, and discharging the mixture into a hopper of another single-screw extruder; the screw temperature is 185-195-205-215-225 ℃, the filter temperature is 243 ℃, the spinneret plate is 248 ℃, the spinneret holes are cross spinneret holes, the cooling temperature is 35 ℃, the traction speed is 1100m/min, and the nascent filament bundles are oiled, wound and dropped into a barrel to be collected.
2) Preparing post-spun drawn colored tows: the nascent tows are reasonably bundled according to the requirements, the water bath drafting speed is 200m/min, the heating medium is water, the temperature of a first water bath is 72 ℃, the temperature of a second water bath is 76 ℃, the drafting total multiple is 4 times, the nascent tows are pre-shaped by water vapor, curled by water cooling and curled in a number of 30/25 mm, and the colored polylactic acid tows with the skin-core structure are obtained after drying at 68 ℃, as shown in figure 2, the colored polylactic acid tows with the skin-core structure comprise a skin layer structure 1 and a core layer structure 2.
Comparative example 3
A method of making a colored polylactic acid tow, this comparative example being different from example 3 in that:
the core layer comprises the following components: 54.94 parts of polylactic acid (the crystallinity is 55 percent, and the melt index is 35g/10 min);
the cortex layer comprises: 45 parts of polylactic acid (the crystallinity is 5 percent, and the melt index is 25g/10min) and 0.06 part of iron oxide red.
Example 4
The embodiment of a preparation method of colored polylactic acid tows is different from that of example 3 in that:
the core layer comprises: 50 parts of polylactic acid (with the crystallinity of 40 percent and the melt index of 35g/10min) and 0.1 part of nano aluminum oxide;
the cortex layer comprises: 40 parts of polylactic acid (the crystallinity is 10 percent, and the melt index is 30g/10min), 9.8 parts of methyl methacrylate-butyl methacrylate and 0.1 part of iron oxide yellow.
Comparative example 4
A method of making a colored polylactic acid tow, this comparative example being different from example 4 in that:
the core layer comprises: 54.9 parts of polylactic acid (the crystallinity is 40 percent, and the melt index is 35g/10 min);
the cortex layer comprises: 45 parts of polylactic acid (the crystallinity is 10 percent, and the melt index is 30g/10min) and 0.1 part of iron oxide yellow.
Example 5
A preparation method of colored polylactic acid tows comprises the following steps:
1) preparing the primary raw silk: mixing 50 parts of polylactic acid (with the crystallinity of 45 percent and the melt index of 35g/10min)5 parts of polylactic acid (with the crystallinity of 55 percent and the melt index of 25g/10min) and 0.15 part of carbon nano tube in a vacuum drum dryer at the temperature of 80 ℃, drying for 12 hours in a rotating manner, cooling to the temperature below 45 ℃, discharging the mixture into a hopper of a single-screw extruder; mixing 40 parts of polylactic acid (with the crystallinity of 8 percent and the melt index of 30g/10min) composed of a skin layer, 4.8 parts of methyl methacrylate-hydroxyethyl methacrylate copolymer and 0.05 part of phthalocyanine blue, placing the mixture in a vacuum drum dryer at the temperature of 60 ℃, drying the mixture for 24 hours in a rotating manner, cooling the mixture to the temperature below 45 ℃, and discharging the mixture into a hopper of another single-screw extruder; the screw temperature is 185-195-205-215-225 ℃, the filter temperature is 236 ℃, the spinneret plate is 232 ℃, the spinneret holes are H-shaped spinneret holes, the cooling temperature is 15 ℃, the traction speed is 600m/min, and the nascent filament bundles are oiled, wound and dropped into a barrel to be collected.
2) Preparing post-spun drawn colored tows: the nascent filament bundle is reasonably bundled according to the requirements, the water bath drafting speed is 230m/min, the heating medium is water, the temperature of the first water bath is 68 ℃, the temperature of the second water bath is 72 ℃, the drafting total multiple is 2.5 times, the filament bundle is preformed by water vapor, is curled by water cooling, the number of curls is 23/25 mm, and the colored polylactic acid filament bundle with the skin-core structure is obtained after drying at 60 ℃, as shown in figure 3, the colored polylactic acid filament bundle comprises a skin layer structure 1 and a core layer structure 2.
Comparative example 5
A method of making a colored polylactic acid tow, this comparative example differing from example 5 in that:
the core layer comprises: 50 parts of polylactic acid (the crystallinity is 45 percent, and the melt index is 35g/10min), and 9.95 parts of polylactic acid (the crystallinity is 55 percent, and the melt index is 25g/10 min);
the cortex layer comprises: 40 parts of polylactic acid (crystallinity 8%, melt index 30g/10min), 0.05 part of phthalocyanine blue.
Example 6
The difference between the preparation method of the colored polylactic acid tow and the embodiment 5 is that:
the core layer comprises: 40 parts of polylactic acid (the crystallinity is 40 percent, and the melt index is 15g/10min), 30 parts of polylactic acid (the crystallinity is 55 percent, and the melt index is 35g/10min), and 0.02 part of graphene;
the cortex layer comprises: 26 parts of polylactic acid (the crystallinity is 5 percent, and the melt index is 35g/10min), 3.95 parts of methyl methacrylate-hydroxybutyl methacrylate copolymer and 0.03 part of phthalocyanine green;
the colored polylactic acid tow with the skin-core structure is obtained, and as shown in fig. 4, comprises a skin structure 1 and a core structure 2.
Comparative example 6
A method of making a colored polylactic acid tow, this comparative example being different from example 6 in that:
the core layer comprises: 40 parts of polylactic acid (crystallinity is 40 percent, and melt index is 15g/10min), and 30 parts of polylactic acid (crystallinity is 55 percent, and melt index is 35g/10 min);
the cortex layer comprises: 29.97 parts of polylactic acid (crystallinity 5%, melt index 35g/10min), 0.03 part of phthalocyanine green.
Performance testing
And (3) testing heat resistance: cutting a certain length of the sample L1 after the tow sample is completely opened, measuring the length L2 again after the sample is placed in an environment with the temperature of 65 ℃ for 30min, and calculating the shrinkage rate L as follows:
the smaller the shrinkage L, the higher the heat resistance.
Color fastness test: after selecting a part of tow samples to be completely loosened, placing the tow samples in hot water at 50 ℃ and 80 ℃ for soaking for 24 hours, taking out the tows to observe the color change of the aqueous solution, wherein the color of the aqueous solution indicates poor color fastness, and the color of the aqueous solution does not indicate excellent color fastness.
The shrinkage and color fastness of the polylactic acid tows prepared in the examples 1-6 and the comparative examples 1-6 by different processes were measured, and the results are shown in table 1.
TABLE 1 shrinkage and color testing of aqueous solutions of polylactic acid tows prepared by different processes
| Shrinkage ratio% | Color of 50 ℃ aqueous solution | Colour of 80 ℃ aqueous solution | |
| Example 1 | 0.3 | Is free of | Is free of |
| Comparative example 1 | 1.0 | Is provided with | Is provided with |
| Example 2 | 0.5 | Is free of | Is free of |
| Comparative example 2 | 1.2 | Is provided with | Is provided with |
| Example 3 | 0.1 | Is free of | Is free of |
| Comparative example 3 | 0.9 | Is provided with | Is provided with |
| Example 4 | 0.4 | Is free of | Is free of |
| Comparative example 4 | 2.0 | Is provided with | Is provided with |
| Example 5 | 0.5 | Is free of | Is free of |
| Comparative example 5 | 1.6 | Is provided with | Is provided with |
| Example 6 | 0.5 | Is free of | Is free of |
| Comparative example 6 | 1.7 | Is provided with | Is provided with |
The above embodiments are described in detail for different implementations of the present invention, but the implementation manner of the present invention is not limited thereto, and those skilled in the art can achieve the object of the present invention based on the disclosure of the present invention, and any modifications and variations based on the concept of the present invention fall within the protection scope of the present invention, and the specific protection scope is subject to the claims.
Claims (3)
1. The colored polylactic acid tow is characterized by comprising a material A and a material B;
the material A comprises the following components in percentage by mass: 45 to 70 weight percent of crystalline polylactic acid and 0.02 to 0.2 weight percent of nucleating agent;
the material B comprises the following components in percentage by mass: 26 to 45 weight percent of non-crystalline polylactic acid, 3.75 to 9.88 weight percent of color fixing material and 0.05 to 0.1 weight percent of pigment; the color fixing material comprises a methacrylate polymer; the pigment is one of titanium dioxide, carbon black, iron oxide red, iron oxide yellow, phthalocyanine blue and phthalocyanine green;
the colored polylactic acid tows are of a skin-core structure, the material A is used as a core layer of the skin-core structure, and the material B is used as a skin layer of the skin-core structure;
the crystallinity of the crystalline polylactic acid is 40-55%, the melt index is 15-40 g/10min, and the melting temperature is 175-215 ℃; the crystallinity of the non-crystalline polylactic acid is 5-10%, the melt index is 15-35 g/10min, and the melting temperature is 135-150 ℃;
the nucleating agent comprises at least one of nano silicon dioxide, nano titanium dioxide, graphene and carbon nano tubes;
the color fixing material comprises methyl methacrylate-isooctyl acrylate copolymer, methyl methacrylate-ethyl methacrylate copolymer, methyl methacrylate-methacrylic acid copolymer, methyl methacrylate-butyl methacrylate, methyl methacrylate-hydroxyethyl methacrylate copolymer and methyl methacrylate-hydroxybutyl methacrylate copolymer.
2. The colored polylactic acid tow according to claim 1, wherein the cross-sectional shape of the polylactic acid tow comprises a cross, an X, an H or a sheath-core like structure.
3. A method of making the colored polylactic acid tow of claim 1 or 2, comprising the steps of:
s1) taking materials according to the raw material ratio, and preparing polylactic acid nascent tows;
s2) drawing the nascent tow obtained in S1) to obtain a colored polylactic acid tow.
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| CN116065257A (en) * | 2023-01-16 | 2023-05-05 | 广东秋盛资源股份有限公司 | High-color-fastness fiber, and preparation method and application thereof |
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| CN103074716B (en) * | 2013-02-07 | 2015-04-22 | 中国烟草总公司郑州烟草研究院 | Sheath-core polylactic acid tobacco tow and filter stick and preparation method thereof |
| CN105178138B (en) * | 2015-08-12 | 2017-05-31 | 江苏联创人造草坪股份有限公司 | A kind of chinampa with matt and preparation method thereof |
| CN106319681A (en) * | 2016-08-29 | 2017-01-11 | 董晓 | Preparation method of easy-to-color anti-static spandex fibers |
| CN106758418A (en) * | 2016-12-23 | 2017-05-31 | 句容市申兔工艺针织厂 | A kind of color fixing process of formaldehyde-free color fixing agent |
| CN111074377A (en) * | 2019-12-23 | 2020-04-28 | 中国纺织科学研究院有限公司 | Eccentric sheath-core colored fiber, and preparation method and preparation device thereof |
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