CN111101239A - Low-temperature dyed polyester fiber, fabric and production method thereof - Google Patents
Low-temperature dyed polyester fiber, fabric and production method thereof Download PDFInfo
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- CN111101239A CN111101239A CN202010002870.8A CN202010002870A CN111101239A CN 111101239 A CN111101239 A CN 111101239A CN 202010002870 A CN202010002870 A CN 202010002870A CN 111101239 A CN111101239 A CN 111101239A
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
- C08G63/688—Polyesters containing atoms other than carbon, hydrogen and oxygen containing sulfur
- C08G63/6884—Polyesters containing atoms other than carbon, hydrogen and oxygen containing sulfur derived from polycarboxylic acids and polyhydroxy compounds
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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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Abstract
The invention provides a low-temperature dyeing polyester fiber, a fabric and a production method thereof, wherein the fiber has a composite structure comprising a skin layer and a core layer, and the mass ratio of the skin layer to the core layer is 1: 1-1.5: 1; the core layer is a poly terephthalic acid 1, 3-propylene glycol ester layer, and the skin layer is a modified polyester layer; the modified polyester layer is prepared by reacting hydrophilic polyester, dimethyl isophthalate sodium sulfonate, isophthalic acid diethylene glycol ester sulfonate, aliphatic dibasic acid and polyether; the mass percentage ratio of the hydrophilic polyester, the dimethyl isophthalate sodium sulfonate, the isophthalic acid diethylene glycol sulfonate, the aliphatic dibasic acid and the polyether is (85-95): (1-5): (2-4): (1-6): (2-5). The sheath-core composite fiber can be dyed at low temperature, and water and energy are saved. On the other hand, the composite fiber and the fabric have better elasticity, hand feeling and the like.
Description
Technical Field
The invention relates to the technical field of garment materials, in particular to low-temperature dyed polyester fibers, a low-temperature dyed polyester fabric and a production method of the low-temperature dyed polyester fiber and the low-temperature dyed polyester fabric.
Background
The polyester fiber is a common chemical fiber fabric fiber, and is mainly a synthetic fiber obtained by spinning polyester formed by polycondensation of organic dibasic acid and dihydric alcohol. Since polyethylene terephthalate fiber (also called polyester fiber) is a main variety, polyester fiber is commonly called the fiber. The fiber has the advantages of high breaking strength and elastic modulus, good rebound resilience, excellent heat setting performance and the like, and is widely applied to the shoe and clothing industry. However, polyester fibers are difficult to dye due to the compact structure and lack of groups for absorbing ionic dyes in molecules, and need to be dyed under the conditions of heating and pressurizing, and the dye uptake is not high. In the process of dyeing the terylene, a large amount of water and energy are needed to cause the waste of a large amount of energy and water, so that the textile industry is also one of the main energy consumption industries in the world, and the dyeing is the most serious link of energy consumption and pollution in the textile industry.
In addition, polyester fiber has many limited applications due to high temperature and high pressure dyeing. For example, the elastic knitted polyester fabric (containing spandex) is popular with consumers due to its unique hand feeling, style, performance, etc., and the high temperature of the elastic knitted polyester fabric in the dyeing and finishing stage can cause the spandex fiber to be greatly damaged, resulting in the reduction of elasticity, thus being prohibitive for many enterprises. For another example, because the dyeing mechanisms and dyeing temperatures of the polyester and nylon are different, the polyester and nylon blended fabric generally adopts a two-bath dyeing process, i.e., firstly, disperse dye is adopted to dye the polyester under the high-temperature condition of 130 ℃, and then, acid dye is selected to dye the nylon at the temperature of 100 ℃. The dyeing cost of the two-bath dyeing process is high, and meanwhile, the color fastness of the fabric is poor; in addition, if the dyeing process is controlled improperly, nylon can be oxidized and become brittle at high temperature, so that the fabric is scrapped.
In the face of the difficulty in dyeing of the polyester fabric, most enterprises aim at improving the dyeing process or using a novel auxiliary agent, but the problems are not fundamentally solved by the methods.
Disclosure of Invention
In view of the above, the present application provides a low-temperature dyed polyester fiber, a fabric and a production method thereof, and the polyester fiber provided by the present invention can be dyed at a lower temperature and has better fiber elasticity.
The invention provides a low-temperature dyed polyester fiber, which has a composite structure comprising a skin layer and a core layer, wherein the mass ratio of the skin layer to the core layer is 1: 1-1.5: 1; the core layer is a poly terephthalic acid 1, 3-propylene glycol ester layer, and the skin layer is a modified polyester layer;
the modified polyester layer is prepared by reacting hydrophilic polyester, dimethyl isophthalate sodium sulfonate, isophthalic acid diethylene glycol ester sulfonate, aliphatic dibasic acid and polyether; the mass percentage ratio of the hydrophilic polyester, the dimethyl isophthalate sodium sulfonate, the isophthalic acid diethylene glycol sulfonate, the aliphatic dibasic acid and the polyether is (85-95): (1-5): (2-4): (1-6): (2-5).
Preferably, the number average molecular weight of the hydrophilic polyester is 20000-25000.
The invention provides a production method of low-temperature dyed polyester fibers, which comprises the following steps:
mixing 85% -95% of hydrophilic polyester, 1% -5% of dimethyl isophthalate sodium sulfonate, 2% -4% of isophthalic acid diethylene glycol ester sulfonate, 1% -6% of aliphatic dibasic acid and 2% -5% of polyether for reaction to obtain a modified polyester material;
respectively metering the modified polyester material and the poly (1, 3-propylene glycol terephthalate), and carrying out sheath-core composite spinning to obtain sheath-core nascent fibers;
subjecting the sheath-core nascent fiber to a drafting process to obtain a low-temperature dyed polyester fiber;
the low-temperature dyed polyester fiber comprises a skin layer and a core layer, wherein the mass ratio of the skin layer to the core layer is 1: 1-1.5: 1; the core layer is a poly terephthalic acid 1, 3-propylene glycol ester layer.
Preferably, in the process of preparing the modified polyester material, hydrophilic polyester, dimethyl isophthalate sodium sulfonate and diethylene glycol isophthalate sulfonate are added for polymerization, and after the polymerization is over 90%, aliphatic dibasic acid and polyether are added for modification to obtain the modified polyester material.
Preferably, the temperature of the sheath-core composite spinning is 250-270 ℃.
Preferably, the fiber obtained by the sheath-core composite spinning is sequentially cooled, oiled, drawn, stretched, elasticated and shaped to obtain the low-temperature dyed polyester fiber filament.
Preferably, the method further comprises the following steps: the obtained low-temperature dyed polyester fiber filaments are cut to obtain short fibers with required specifications.
The invention provides a fabric which comprises the low-temperature dyeing polyester fiber.
Preferably, the fabric further comprises one or more of nylon, wool and spandex.
Preferably, the fabric is a dyed fabric dyed at a low temperature of below 130 ℃.
Compared with the prior art, the polyester fiber provided by the invention is a sheath-core composite fiber comprising a sheath layer and a core layer, wherein a poly (1, 3-trimethylene terephthalate) (PTT) layer is used as the core layer, and a modified polyester layer is used as the sheath layer; the modified polyester layer is prepared by reacting hydrophilic polyester, dimethyl isophthalate sodium sulfonate, diethylene glycol isophthalate sulfonate, aliphatic dibasic acid and polyether in a specific ratio, and the mass ratio of the skin layer to the core layer is 1: 1-1.5: 1. in the sheath-core structure fiber, the sheath layer is added with a plurality of monomers capable of being combined with dye molecules at low temperature, and the monomer can be colored at low temperature when the fiber is dyed, so that the fiber has excellent color fastness, the dyeing performance of the polyester fiber is improved, and the fiber can be dyed at lower temperature; the use of dye and other water and electricity energy sources can be reduced, water and energy are saved, the fiber comfort is not influenced, the application field of the polyester fiber can be enlarged, the damage of high temperature to other fibers such as nylon, wool, spandex and the like is reduced, and the quality of the fabric is improved. On the other hand, as the core layer component is PTT, the composite fiber and the fabric have good elasticity, low modulus and soft hand feeling, and can improve the elasticity, hand feeling and the like of the composite fiber and the fabric.
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FIG. 1 is a schematic cross-sectional view of a low temperature dyed polyester fiber according to some embodiments of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a low-temperature dyed polyester fiber, which has a composite structure comprising a skin layer and a core layer, wherein the mass ratio of the skin layer to the core layer is 1: 1-1.5: 1; the core layer is a poly terephthalic acid 1, 3-propylene glycol ester layer, and the skin layer is a modified polyester layer;
the modified polyester layer is prepared by reacting hydrophilic polyester, dimethyl isophthalate sodium sulfonate, isophthalic acid diethylene glycol ester sulfonate, aliphatic dibasic acid and polyether; the mass percentage ratio of the hydrophilic polyester, the dimethyl isophthalate sodium sulfonate, the isophthalic acid diethylene glycol sulfonate, the aliphatic dibasic acid and the polyether is (85-95): (1-5): (2-4): (1-6): (2-5).
The polyester fiber provided by the invention can be dyed at a lower temperature, and has the characteristics of better elasticity, recoverability, soft hand feeling and the like.
The fiber provided by the invention has a composite structure comprising a skin layer and a core layer, namely, the skin-core fiber. The sheath-core fiber is a composite fiber which is formed by two component polymers respectively and continuously forming a sheath layer and a core layer along the longitudinal direction of the fiber, and can be divided into a plurality of types, such as concentric circles, eccentric circles, special-shaped sections and the like; in the embodiment of the invention, the low-temperature dyed polyester fiber is approximately concentric circular section sheath-core fiber. And the mass ratio of the skin layer to the core layer is 1: 1-1.5: 1.
in the structure of the fiber, the core layer is a poly (1, 3-trimethylene terephthalate) (PTT) layer, which mainly endows the fiber with good elasticity and hand feeling. The polymer PTT is generally prepared by melt polycondensation by using 1, 3-propanediol and terephthalic acid as raw materials; PTT fiber is generally characterized by easy dyeing, soft hand feeling, rich elasticity and the like.
In the structure of the fiber, the skin layer is a modified polyester layer, and the fiber is prepared by reacting hydrophilic polyester, dimethyl isophthalate sodium sulfonate, isophthalic acid diethylene glycol sulfonate, aliphatic dibasic acid and polyether.
Wherein, the hydrophilicity of the hydrophilic polyester is improved compared with that of the common polyester, and the hydrophilic polyester is mainly used for improving the moisture regain of the fiber and improving the comfort. The hydrophilic polyester can be prepared from commercially available slice raw materials, and the number average molecular weight of the hydrophilic polyester can be 20000-25000; the official moisture regain is 3.0-3.8%. The sodium dimethyl isophthalate sulfonate, the isophthalic acid diethylene glycol sulfonate, the aliphatic dibasic acid (such as adipic acid, sebacic acid and the like) and the polyether (including but not limited to polyethylene glycol ether, polypropylene glycol ether and the like) are monomers which can be combined with dye molecules at low temperature, and the hydrophilic polyester in the skin layer is subjected to modification reaction, so that the low-temperature dyeing property of the fiber is improved. The skin layer of the invention adopts the multiple monomers, thus the binding capacity with dye can be increased and the color fastness is improved.
In the fiber skin layer, the mass percentage ratio of the hydrophilic polyester, the dimethyl isophthalate sodium sulfonate, the isophthalic acid diethylene glycol sulfonate, the aliphatic dibasic acid and the polyether is (85-95): (1-5): (2-4): (1-6): (2-5). In the embodiment of the invention, the low-temperature dyed polyester fiber can be filament or staple fiber.
The invention provides a production method of low-temperature dyed polyester fibers, which comprises the following steps:
mixing 85% -95% of hydrophilic polyester, 1% -5% of dimethyl isophthalate sodium sulfonate, 2% -4% of isophthalic acid diethylene glycol ester sulfonate, 1% -6% of aliphatic dibasic acid and 2% -5% of polyether for reaction to obtain a modified polyester material;
respectively metering the modified polyester material and the poly (1, 3-propylene glycol terephthalate), and carrying out sheath-core composite spinning to obtain sheath-core nascent fibers;
subjecting the sheath-core nascent fiber to a drafting process to obtain a low-temperature dyed polyester fiber;
the low-temperature dyed polyester fiber comprises a skin layer and a core layer, wherein the mass ratio of the skin layer to the core layer is 1: 1-1.5: 1; the core layer is a poly terephthalic acid 1, 3-propylene glycol ester layer.
The embodiment of the invention firstly prepares the modified polyester material: mixing 85% -95% of hydrophilic polyester, 1% -5% of dimethyl isophthalate sodium sulfonate, 2% -4% of isophthalic acid diethylene glycol ester sulfonate, 1% -6% of aliphatic dibasic acid and 2% -5% of polyether, and reacting to obtain the modified polyester material.
Wherein, the hydrophilicity of the hydrophilic polyester is improved compared with that of the common polyester, and the hydrophilic polyester is mainly used for improving the moisture regain of the fiber and improving the comfort. The hydrophilic polyester is prepared from commercially available raw materials, and the number average molecular weight of the hydrophilic polyester can be 20000-25000; the official moisture regain is 3.0-3.8%. The dimethyl isophthalate sodium sulfonate, the isophthalic acid diethylene glycol sulfonate, the aliphatic dibasic acid and the polyether are monomers which can be combined with dye molecules at low temperature, and carry out modification reaction on hydrophilic polyester in a skin layer. The aliphatic dibasic acids such as adipic acid, sebacic acid, and the like; the polyethers include, but are not limited to, polyethylene glycol ethers, polypropylene glycol ethers, and the like.
Note that, the Moisture Regain (Rate of Moisture Regain): the weight of the water content of the fiber is the percentage of the dry weight of the fiber, namely: moisture regain (wet fiber weight-dry fiber weight)/dry fiber weight. The textile material has certain moisture absorption capacity which is different under different states, and in order to ensure that the moisture absorption of the textile material has certain comparability and simultaneously facilitate the uniform measurement of the weight of the textile material, a standard atmospheric state is generally specified, and the specification of the standard state is internationally uniform and only slightly different in allowable error range. Textile materials vary in their moisture regain and also in their weight. In order to eliminate the weight difference caused by the difference of moisture regain and meet the requirements of textile material trade and inspection, the state stipulates corresponding standards for the moisture regain of various textile materials, which are called official moisture regain. It is numerically close to the equilibrium moisture regain measured under standard temperature and humidity conditions.
And the mass percentage ratio of the hydrophilic polyester, the dimethyl isophthalate sodium sulfonate, the isophthalic acid diethylene glycol sulfonate, the aliphatic dibasic acid and the polyether is (85-95): (1-5): (2-4): (1-6): (2-5). In the process of preparing the modified polyester material, in the embodiment of the invention, preferably, hydrophilic polyester, dimethyl isophthalate sodium sulfonate and diethylene glycol isophthalate sulfonate are added for polymerization, and after the polymerization is completed by more than 90%, aliphatic dibasic acid and polyether are added for modification, so as to obtain the modified polyester material. The completion of the polymerization can be determined approximately by the time and/or the monomer content. According to the embodiment of the invention, the flexibility of the chain segment can be increased through modification, so that the thermal motion is intensified, the total effect is that the dyeing temperature of polyester is greatly reduced, and the effect of easy dyeing at normal temperature and normal pressure is achieved.
According to the mass ratio, the modified polyester material and the poly terephthalic acid 1, 3-propylene glycol ester are respectively weighed. And then, fully drying the two, respectively carrying out composite spinning through a metering pump, and then spinning through a sheath-core composite spinning assembly to obtain sheath-core nascent fibers.
Wherein, the poly terephthalic acid 1, 3-propylene glycol ester is used as a core layer material, the number average molecular weight is 21000-25000, and the melting point is 240-260 ℃. The invention does not need special control on the spinning process, and the temperature for carrying out the skin-core composite spinning can be 250-270 ℃.
After the nascent fiber is obtained by sheath-core composite spinning, the nascent fiber is sequentially subjected to processes of cooling, oiling, drafting, stretching, elasticizing, shaping and the like by some embodiments of the invention to obtain the low-temperature dyed polyester fiber filament. Wherein the drafting multiple can be 2.3-2.5, and the temperature is 90-100 ℃. In addition, the cooling and shaping are preferably carried out by using circular blowing cold air, wherein the temperature of the cold air can be 15-25 ℃, and the air speed is 0.4-0.6 m/s. Other embodiments of the invention further include: the obtained low-temperature dyed polyester fiber filaments are cut to obtain short fibers with required specifications.
When the polyester fiber with the sheath-core structure is produced, the sheath layer is added with some monomers capable of being combined with dye molecules at low temperature, so that the polyester fiber can be colored at low temperature when the fiber is dyed, has excellent color fastness, improves the dyeing performance of the polyester fiber, and can be dyed at lower temperature; the use of dye and other water and electricity energy sources can be reduced, water and energy are saved, the fiber comfort is not influenced, the application field of the polyester fiber can be enlarged, the damage of high temperature to other fibers such as nylon, wool, spandex and the like is reduced, and the quality of the fabric is improved. On the other hand, as the core layer component is PTT, the composite fiber and the fabric have good elasticity, low modulus and soft hand feeling, and can improve the elasticity, hand feeling and the like of the composite fiber and the fabric.
The invention provides a fabric which comprises the low-temperature dyeing polyester fiber. The fabric can be dyed at low temperature and has good elasticity, hand feeling and the like.
In some embodiments of the invention, the face fabric is woven from only the low temperature dyed polyester fibers. In other embodiments, the fabric further comprises one or more of nylon, wool, and spandex.
Namely the blended fabric with any proportion.
The fabric can be knitted or woven fabric and can be used as textiles such as clothes and the like. Specifically, the fabric is a dyed fabric dyed at a low temperature below 130 ℃ (for example, 120-100 ℃), the color fastness is excellent, and water and energy are saved in the production process.
For further understanding of the present application, the low temperature dyeing polyester fiber, the fabric and the production method thereof provided by the present application will be specifically described below with reference to examples. It should be understood, however, that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the following examples.
Example 1
Mixing 91% hydrophilic polyesterChemical fiber FD503 hydrophilic polyester chip), 3 percent sodium dimethyl isophthalate sulfonate and 2 percent sodium diethylene glycol isophthalate sulfonate are firstly added into a reaction kettle for polymerization, 1 percent adipic acid and 3 percent polyethylene glycol ether (molecular weight 300-plus 500) are added for modification after 90 percent of polymerization is completed within 30 to 45 minutes, and modified polyester material (viscous liquid) is obtained, wherein the molecular structure of the modified polyester material contains sodium sulfoisophthalate groups, -O-CH2-CH2-、(-CH2-CH2O-) segments, and the like.
Respectively weighing the modified polyester material and the 1, 3-polytrimethylene terephthalate (molecular weight of 21000-;
and sequentially cooling, oiling, drafting, stretching, elasticizing and sizing the sheath-core nascent fiber by cold air to obtain the low-temperature dyed polyester fiber. Wherein the drafting multiple is 2.3-2.5, and the temperature is 90-95 ℃; and cooling and shaping by using circular blowing cold air, wherein the temperature of the cold air is 20-25 ℃, and the air speed is 0.4-0.6 m/s.
The low-temperature dyeing polyester fiber comprises a skin layer and a core layer, and the schematic structure is shown in figure 1. Wherein the mass ratio of the skin layer to the core layer is 1.2: 1; the core layer is a poly terephthalic acid 1, 3-propylene glycol ester layer; the finished yarn was 75D/36F.
Interweaving the obtained low-temperature dyed polyester fiber (50D/36F DTY yarn) on a water jet loom by selecting plain weave to form a kasugao grey fabric (the gram weight of the fabric is 80 g/m)2) The grey cloth is softened, reduced, dyed and sized to obtain dyed fabric.
Wherein the dye is a cationic dye (cationic blue X-GRL, dosage: 2% owf). The dyeing process comprises the following steps: dyeing at 0 ℃, heating at the rate of 2 ℃/min, boiling and dyeing at 100 ℃ for 40 minutes, cooling and washing after dyeing, then soaping with 2g/L soap solution, and finally washing and drying.
The dyed fabric obtained was subjected to tests for color fastness and the like, and the results are as follows.
TABLE 1 results of the color fastness and elasticity tests of the dyed fabrics of example 1 of the invention
Example 2
93 percent of hydrophilic polyester (characterized chemical fiber FD503 hydrophilic polyester slice), 2 percent of sodium dimethyl isophthalate and 2 percent of sodium diethylene glycol isophthalate are firstly added into a reaction kettle for polymerization, and after the polymerization is completed by 90 percent within 30 to 45 minutes, 1 percent of adipic acid and 2 percent of polyglycol ether (molecular weight 300-500) are added for modification, so as to obtain the modified polyester material (viscous liquid).
Respectively weighing the modified polyester material and the poly (1, 3-propylene glycol terephthalate) (molecular weight 21000-;
and sequentially cooling, oiling, drafting, stretching, elasticizing and sizing the sheath-core nascent fiber by cold air to obtain the low-temperature dyed polyester fiber. Wherein the drafting multiple is 2.3-2.5, and the temperature is 90-95 ℃; and cooling and shaping by using circular blowing cold air, wherein the temperature of the cold air is 20-25 ℃, and the air speed is 0.4-0.6 m/s.
The low-temperature dyed polyester fiber comprises a skin layer and a core layer, wherein the mass ratio of the skin layer to the core layer is 1.4: 1; the core layer is a poly terephthalic acid 1, 3-propylene glycol ester layer.
According to the proportion of 60%: weaving the obtained low-temperature dyed polyester fiber (75D/72F DTY yarn) and chinlon according to the blending mass ratio of 40 percent to obtain the chinlon polyester elastic grey fabric (the gram weight of the fabric is 100 g/m)2) And dyeing the grey cloth to obtain a dyed fabric.
Wherein the dye is a cationic dye (cationic blue X-GRL, dosage: 2% owf). The dyeing process comprises the following steps: dyeing at 0 ℃, heating at the rate of 2 ℃/min, boiling and dyeing at 100 ℃ for 40 minutes, cooling and washing after dyeing, then soaping with 2g/L soap solution, and finally washing and drying.
The dyed fabric obtained was subjected to tests for color fastness and the like, and the results are as follows.
TABLE 2 results of color fastness and elasticity tests of the dyed fabrics of example 2 of the present invention
From the above examples, it can be seen that the fiber of the present invention can be dyed at a low temperature of 100 ℃, has excellent color fastness, and improves the dyeing performance of polyester fiber. The invention can reduce the use of dye and other hydroelectric energy, save water and energy, does not influence the comfort of the fiber, can expand the application field of the polyester fiber, reduces the damage of high temperature to other fibers such as nylon, wool, spandex and the like, and improves the quality of the fabric. On the other hand, as the core layer component is PTT, the composite fiber and the fabric have good elasticity, low modulus and soft hand feeling, and can improve the elasticity, hand feeling and the like of the composite fiber and the fabric.
The above description is only a preferred embodiment of the present invention, and it should be noted that various modifications to these embodiments can be implemented by those skilled in the art without departing from the technical principle of the present invention, and these modifications should be construed as the scope of the present invention.
Claims (10)
1. A low-temperature-dyeing polyester fiber is characterized by having a composite structure comprising a skin layer and a core layer, wherein the mass ratio of the skin layer to the core layer is 1: 1-1.5: 1; the core layer is a poly terephthalic acid 1, 3-propylene glycol ester layer, and the skin layer is a modified polyester layer;
the modified polyester layer is prepared by reacting hydrophilic polyester, dimethyl isophthalate sodium sulfonate, isophthalic acid diethylene glycol ester sulfonate, aliphatic dibasic acid and polyether; the mass percentage ratio of the hydrophilic polyester, the dimethyl isophthalate sodium sulfonate, the isophthalic acid diethylene glycol sulfonate, the aliphatic dibasic acid and the polyether is (85-95): (1-5): (2-4): (1-6): (2-5).
2. The low-temperature-dyed polyester fiber as claimed in claim 1, wherein the hydrophilic polyester has a number average molecular weight of 20000-25000.
3. A production method of low-temperature dyed polyester fibers comprises the following steps:
mixing 85% -95% of hydrophilic polyester, 1% -5% of dimethyl isophthalate sodium sulfonate, 2% -4% of isophthalic acid diethylene glycol ester sulfonate, 1% -6% of aliphatic dibasic acid and 2% -5% of polyether for reaction to obtain a modified polyester material;
respectively metering the modified polyester material and the poly (1, 3-propylene glycol terephthalate), and carrying out sheath-core composite spinning to obtain sheath-core nascent fibers;
subjecting the sheath-core nascent fiber to a drafting process to obtain a low-temperature dyed polyester fiber;
the low-temperature dyed polyester fiber comprises a skin layer and a core layer, wherein the mass ratio of the skin layer to the core layer is 1: 1-1.5: 1; the core layer is a poly terephthalic acid 1, 3-propylene glycol ester layer.
4. The production method according to claim 3, wherein in the process of preparing the modified polyester material, the hydrophilic polyester, the dimethyl isophthalate sodium sulfonate and the isophthalic acid diethylene glycol sulfonate are added for polymerization, and after the polymerization is over 90 percent, the aliphatic dibasic acid and the polyether are added for modification to obtain the modified polyester material.
5. The production method as claimed in claim 3, wherein the temperature of the sheath-core composite spinning is 250-270 ℃.
6. The production method according to claim 5, wherein the fiber obtained by the sheath-core composite spinning is sequentially cooled, oiled, drawn, stretched, elasticated and shaped to obtain the low-temperature dyed polyester fiber filament.
7. The production method according to claim 6, further comprising: the obtained low-temperature dyed polyester fiber filaments are cut to obtain short fibers with required specifications.
8. A fabric, comprising: the low-temperature-dyed polyester fiber according to any one of claims 1 to 2 or the low-temperature-dyed polyester fiber obtained by the production method according to any one of claims 3 to 7.
9. The fabric of claim 8, further comprising one or more of nylon, wool, and spandex.
10. A fabric according to claim 8 or 9, wherein the fabric is a dyed fabric dyed at a low temperature of 130 ℃ or below.
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| CN111607843A (en) * | 2020-06-24 | 2020-09-01 | 江苏微笑新材料科技有限公司 | Preparation method of anhydride modified sheath-core composite fiber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1912199A (en) * | 2005-08-08 | 2007-02-14 | 东丽纤维研究所（中国）有限公司 | Two-component polyester sheath core compound fibre and production method |
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| CN101613894A (en) * | 2009-08-06 | 2009-12-30 | 浙江理工大学 | The preparation method of dyeable polyester composite fiber of cationic dye |
| CN101906678A (en) * | 2010-08-19 | 2010-12-08 | 中国纺织科学研究院 | Modified polyester complex fiber and preparation method thereof |
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| CN111607843A (en) * | 2020-06-24 | 2020-09-01 | 江苏微笑新材料科技有限公司 | Preparation method of anhydride modified sheath-core composite fiber |
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