CN108532026B - Core-sheath composite fiber, manufacturing method thereof and textile - Google Patents
Core-sheath composite fiber, manufacturing method thereof and textile Download PDFInfo
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- CN108532026B CN108532026B CN201611138366.0A CN201611138366A CN108532026B CN 108532026 B CN108532026 B CN 108532026B CN 201611138366 A CN201611138366 A CN 201611138366A CN 108532026 B CN108532026 B CN 108532026B
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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
- D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide 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
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/44—Polyester-amides
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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 discloses a core-sheath composite fiber and a manufacturing method thereof and a textile, the core-sheath composite fiber consists of a core layer and a sheath layer, wherein the core component is a block amide copolymer, the block amide copolymer at least contains a polycaprolactam structural unit, a terephthalic acid structural unit and a polyethylene glycol structural unit, and the sheath component is polyamide; the composite composition ratio of the core component to the sheath component is 10/90-70/30. The core-sheath composite fiber textile has excellent hygroscopicity, antistatic property and yellowing resistance.
Description
Technical Field
The present invention relates to a high strength core-sheath conjugate fiber having excellent hygroscopicity, antistatic property and yellowing resistance.
Background
Polyamide fiber is one of chemical fibers having high strength, has properties such as friction resistance, bending deformation resistance, and wrinkle resistance, and is excellent in dyeability and processability, and thus is widely used in the clothing market. And the polyamide fiber with fine titer has soft hand feeling and is comfortable to wear, and is mostly applied to the manufacture of underwear. Polyamide fibers are preferable among synthetic fibers because of their properties such as low water absorption and rapid drying after moisture absorption, but have problems such as poor moisture absorption, air impermeability, stickiness, and the like, and are easily charged, and are likely to cause discomfort due to static electricity, compared to natural fibers such as cotton. In addition, the polyamide fiber has poor yellowing resistance, such as when the polyamide fiber is exposed to sunlight outdoors for a long time or in the transportation process, the fiber is easy to yellow, the surface of the fiber is smooth and has a waxy feeling, and the fabric is not stiff enough, so that the application range and the application field of the fiber are affected.
Therefore, there is a need for the development of a polyamide fiber which can eliminate problems of air impermeability and stickiness, has excellent moisture absorption and desorption properties, antistatic properties, and yellowing resistance, and can be widely used for the production of fabrics such as underwear and sportswear.
Chinese patent CN201380037103.9 discloses a skin-core composite fiber, in which the core layer is not exposed on the surface of the fiber, the skin layer is nylon 6, and the core layer is polyether block amide copolymer of nylon 6, i.e. the core layer is polyether modified nylon 6, and has hygroscopicity, antistatic property and contact cold feeling. However, the data of the examples show that, for example, in example 2, when the area ratio of the core portion to the sheath portion is 1/2, the difference in moisture absorption rate is 7.7%, and the initial triboelectric voltage is 1830V, and it is found that the moisture absorption property and the antistatic property are still further improved.
Disclosure of Invention
The invention aims to provide a high-strength core-sheath composite fiber with excellent hygroscopicity and antistatic property. Further, a high strength core-sheath conjugate fiber having excellent hygroscopicity, antistatic property and yellowing resistance is provided.
The technical solution of the invention is as follows:
a core-sheath composite fiber comprises a core layer and a sheath layer, wherein the core component is a block amide copolymer, the block amide copolymer at least contains a polycaprolactam structural unit, a terephthalic acid structural unit and a polyethylene glycol structural unit, and the sheath component is polyamide; the composite composition ratio of the core component to the sheath component is 10/90-70/30.
In the core-sheath composite fiber of the present invention, the block amide copolymer as the core component preferably further contains a bisphenol-a polyoxyethylene ether structural unit.
In the core-sheath composite fiber of the present invention, the sheath component polyamide is preferably one of polyamide 6, polyamide 66, polyamide 56, and polyamide 610, and more preferably the sheath component polyamide is polyamide 6.
The core-sheath composite fiber is produced by using a core-sheath composite spinning module, spinning and post-processing a block amide copolymer obtained by copolymerizing at least caprolactam, terephthalic acid and polyethylene glycol as a core component and polyamide as a sheath component, wherein the core-sheath component compounding ratio is 10/90-70/30.
The method for producing a core-sheath composite fiber of the present invention preferably comprises using a core-sheath composite spinning module to spin and post-process a block amide copolymer obtained by copolymerizing at least caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as a core component and polyamide as a sheath component at a core-sheath component compounding ratio of 10/90 to 70/30, thereby producing a core-sheath composite fiber.
The textile obtained by using the core-sheath composite fiber of the invention.
The core-sheath composite fiber and the fabric prepared from the core-sheath composite fiber have excellent hygroscopicity, antistatic property, yellowing resistance and high strength. Especially, the fabric has good hand feeling and can be applied to the fabrics of close-fitting clothes and sports wear.
Detailed Description
The core-sheath composite fiber consists of a core layer and a sheath layer, wherein the core component is a block amide copolymer, the block amide copolymer at least contains a polycaprolactam structural unit, a terephthalic acid structural unit and a polyethylene glycol structural unit, and the sheath component is polyamide; the composite composition ratio of the core component to the sheath component is 10/90-70/30.
The main structural unit of the block amide copolymer of the core component is polycaprolactam, the polyethylene glycol structural unit is used as a copolymerization component to endow the copolymer with hygroscopicity, and a benzene ring structure is introduced into the block amide copolymer, so that the strength is improved.
According to the core-sheath structure, the core component is a moisture absorption component, so that the moisture absorption durability is facilitated; the sheath component is polyamide, and retains strength and spinnability. The composite composition ratio of the core component to the sheath component is 10/90-70/30, preferably 30/70-50/50. The core component content is too high, and although the moisture absorption performance and the antistatic performance are more excellent, the operability is deteriorated in the spinning process, the fiber strength is obviously reduced, and the requirements of textile processing cannot be met. The core component content is too low, and the moisture absorption performance and the antistatic performance cannot be reflected.
In the core-sheath composite fiber of the present invention, the block amide copolymer as the core component preferably further contains a bisphenol-a polyoxyethylene ether structural unit.
When the core component block amide copolymer contains a bisphenol-A polyoxyethylene ether structural unit, not only the moisture absorption performance can be improved, but also the content of terminal amino groups can be reduced, and yellowing of the polyamide fiber can be suppressed.
In the core-sheath composite fiber of the present invention, the sheath component polyamide is preferably one of polyamide 6, polyamide 66, polyamide 56, and polyamide 610, and more preferably the sheath component polyamide is polyamide 6.
The core-sheath composite fiber is produced by using a core-sheath composite spinning module, spinning and post-processing a block amide copolymer obtained by copolymerizing at least caprolactam, terephthalic acid and polyethylene glycol as a core component and polyamide as a sheath component, wherein the core-sheath component compounding ratio is 10/90-70/30.
The method for producing a core-sheath composite fiber of the present invention preferably comprises using a core-sheath composite spinning module to spin and post-process a block amide copolymer obtained by copolymerizing at least caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as a core component and polyamide as a sheath component at a core-sheath component compounding ratio of 10/90 to 70/30, thereby producing a core-sheath composite fiber.
In the method for producing a core-sheath composite fiber of the present invention, the core component is a block amide copolymer obtained by copolymerizing at least caprolactam, terephthalic acid and polyethylene glycol, preferably a block amide copolymer obtained by copolymerizing at least caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether, and a phenolic antioxidant or tetrabutyltitanate as a catalyst may be added as necessary during the synthesis of the copolymer, thereby more effectively improving the heat resistance.
The core-sheath composite fiber and the fabric prepared from the core-sheath composite fiber have excellent moisture absorption, antistatic property and yellowing resistance. Especially, the fabric has good hand feeling and can be applied to the fabrics of close-fitting clothes and sports wear.
The core-sheath composite fiber of the present invention has a strength of 3.0cN/dtex or more and an elongation of 30 to 50%.
The textile prepared from the core-sheath composite fiber has excellent dyeing performance, the dye absorption rate during dyeing is over 90 percent, and the light fastness and the rubbing color fastness of the dyed textile are both over 4 grades. The moisture absorption difference of the textile is more than 8.0 percent, the friction voltage resistance is less than 1.5KV, and the phenol yellowing is more than 4 grade.
The properties of the core-sheath composite fibers and textiles of the present invention were tested in the following manner.
1. Breaking strength of fiber:
the fiber to be measured is placed in a constant temperature and humidity environment for 24 hours, the treated fiber to be measured is randomly selected, the head end of the fiber is clamped in an upper clamp holder, proper pre-tension is added, the fiber is fixed in a lower clamp holder, and the fixation of the fiber to be measured is completed. The tested fibers were drawn until the fibers broke. The strength of the fiber breaking point is the fiber strength.
2. Elongation at break of the fiber: the test was performed according to GB/T3916-.
3. Fiber fineness: the test was performed according to GB/T14343-.
4. Light resistance: the test was performed according to GB/T8427-1998.
5. Color fastness to rubbing: the tests were carried out according to GB/T3920-1997.
6. Moisture absorption: the weight of the sample dried in the drying oven was measured as W1, the stable weight in an environment of 20 ℃ and 65% RH as W2, and the stable weight in an environment of 30 ℃ and 90% RH as W3, and the moisture absorption difference as Δ MR = (W3-W2)/W1 × 100% was calculated by the equation, and the average value was obtained 3 times. The larger the Δ MR value, the better the hygroscopicity.
7. Dye uptake of textiles:
diluting the residual liquid by m times after dyeing, testing the absorbance A of the residual liquid by an absorbance tester, testing the absorbance Ao of the dye solution stock solution diluted by n times by the same method, obtaining the dye absorption rate by the following formula,
dye absorption = (1-mA/nAo) × 100%.
8. Friction withstand voltage: according to JIS L1094: 2014 to perform the test.
9. Phenol yellowing: according to ISO 105-X18: 2007 to perform the test.
The present invention will be further described with reference to the following examples.
Example 1
Firstly, taking sheath polyamide 6 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid and polyethylene glycol as core components, drying at 120 ℃ for 8 hours, respectively putting the core components and the sheath components into various bins, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, finally passing through a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.85cN/dtex and an elongation at break of 38.4%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 8.2 percent, the friction withstand voltage is 1.50KV, and the phenol yellow is changed into 4 grades. See table 1 for details.
Example 2
Firstly, taking sheath polyamide 6 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid and polyethylene glycol as core components, drying at 120 ℃ for 8 hours, respectively putting the core components and the sheath components into various bins, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, finally passing through a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.65cN/dtex and an elongation at break of 37.4%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 10.5 percent, the friction withstand voltage is 1.30KV, and the phenol yellow is changed into 4 grades. See table 1 for details.
Example 3
Firstly, taking sheath polyamide 6 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid and polyethylene glycol as core components, drying at 120 ℃ for 8 hours, respectively putting the core components and the sheath components into various bins, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, finally passing through a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.45cN/dtex and an elongation at break of 36.4%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 12.7 percent, the friction withstand voltage is 0.90KV, and the phenol yellow is changed into 4 grades. See table 1 for details.
Example 4
Firstly, taking a sheath component polyamide 6 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as a core component, drying at 120 ℃ for 8 hours, respectively putting into each bin, controlling the discharge amount by a metering pump, passing through a spinning box and a spinning assembly, finally extruding by a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.81cN/dtex and an elongation at break of 38.1%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 8.5 percent, the friction withstand voltage is 1.44KV, and the phenol yellow is changed to be above grade 4. See table 1 for details.
Example 5
Firstly, taking a sheath component polyamide 6 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as a core component, drying at 120 ℃ for 8 hours, respectively putting into each bin, controlling the discharge amount by a metering pump, passing through a spinning box and a spinning assembly, finally extruding by a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.64cN/dtex and an elongation at break of 37.4%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 10.3 percent, the friction withstand voltage is 1.25KV, and the phenol yellow is changed to be above grade 4. See table 1 for details.
Example 6
Firstly, taking a sheath component polyamide 6 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as a core component, drying at 120 ℃ for 8 hours, respectively putting into each bin, controlling the discharge amount by a metering pump, passing through a spinning box and a spinning assembly, finally extruding by a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.42cN/dtex and an elongation at break of 36.4%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 13.8 percent, the friction withstand voltage is 0.87KV, and the phenol yellow is changed to be above grade 4. See table 1 for details.
Example 7
Firstly, taking sheath component polyamide 66 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid and polyethylene glycol as core components, drying at 120 ℃ for 8 hours, respectively putting the core components and the sheath components into various bins, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, finally passing through a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.68cN/dtex and an elongation at break of 37.2%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 8.0 percent, the friction withstand voltage is 1.49KV, and the phenol yellow is changed into 4 grades. See table 1 for details.
Example 8
Firstly, taking sheath component polyamide 66 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid and polyethylene glycol as core components, drying at 120 ℃ for 8 hours, respectively putting the core components and the sheath components into various bins, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, finally passing through a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.48cN/dtex and an elongation at break of 36.4%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate delta MR of the textile is 9.8 percent, the friction withstand voltage is 1.35KV, and the phenol yellow is changed into 4 grades. See table 1 for details.
Example 9
Firstly, taking sheath component polyamide 66 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid and polyethylene glycol as core components, drying at 120 ℃ for 8 hours, respectively putting the core components and the sheath components into various bins, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, finally passing through a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.25cN/dtex and an elongation at break of 35.2%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 11.7 percent, the friction withstand voltage is 1.10KV, and the phenol yellow is changed into 4 grades. See table 1 for details.
Example 10
Firstly, taking sheath component polyamide 66 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as core components, drying at 120 ℃ for 8 hours, respectively putting into each bin, wherein the core-sheath ratio is 30/70, the temperature of each screw is 285-300 ℃, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min) by a spinneret plate, and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.66cN/dtex and an elongation at break of 36.9%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 8.1 percent, the friction withstand voltage is 1.48KV, and the phenol yellow is changed to be above grade 4. See table 2 for details.
Example 11
Firstly, taking sheath component polyamide 66 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as core components, drying at 120 ℃ for 8 hours, respectively putting into each bin, wherein the core-sheath ratio is 40/60, the temperature of each screw is 285-300 ℃, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min) by a spinneret plate, and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.46cN/dtex and an elongation at break of 35.9%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 10.3 percent, the friction withstand voltage is 1.21KV, and the phenol yellow is changed to be above grade 4. See table 2 for details.
Example 12
Firstly, taking sheath component polyamide 66 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as core components, drying at 120 ℃ for 8 hours, respectively putting into each bin, wherein the core-sheath ratio is 50/50, the temperature of each screw is 285-300 ℃, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min) by a spinneret plate, and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.22cN/dtex and an elongation at break of 34.9%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 12.8 percent, the friction withstand voltage is 0.97KV, and the phenol yellow is changed to be above grade 4. See table 2 for details.
Example 13
Firstly, taking sheath component polyamide 56 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid and polyethylene glycol as core components, drying at 120 ℃ for 8 hours, respectively putting into each bin, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, finally passing through a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.75cN/dtex and an elongation at break of 38.1%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 8.1 percent, the friction withstand voltage is 1.49KV, and the phenol yellow is changed into 4 grades. See table 2 for details.
Example 14
Firstly, taking sheath component polyamide 56 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid and polyethylene glycol as core components, drying at 120 ℃ for 8 hours, respectively putting into each bin, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, finally passing through a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.55cN/dtex and an elongation at break of 36.1%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 10.1 percent, the friction withstand voltage is 1.24KV, and the phenol yellow is changed into 4 grades. See table 2 for details.
Example 15
Firstly, taking sheath component polyamide 56 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid and polyethylene glycol as core components, drying at 120 ℃ for 8 hours, respectively putting into each bin, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, finally passing through a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.35cN/dtex and an elongation at break of 36.1%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 11.7 percent, the friction withstand voltage is 1.01KV, and the phenol yellow is changed into 4 grades. See table 2 for details.
Example 16
Firstly, taking sheath component polyamide 56 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as core components, drying at 120 ℃ for 8 hours, respectively putting into each bin, controlling the discharge amount by a metering pump, passing through a spinning box and a spinning assembly, finally extruding by a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.73cN/dtex and an elongation at break of 37.8%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 8.4 percent, the friction withstand voltage is 1.47KV, and the phenol yellow is changed to be above grade 4. See table 2 for details.
Example 17
Firstly, taking sheath component polyamide 56 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as core components, drying at 120 ℃ for 8 hours, respectively putting into each bin, controlling the discharge amount by a metering pump, passing through a spinning box and a spinning assembly, finally extruding by a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.64cN/dtex and an elongation at break of 37.4%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 10.1 percent, the friction withstand voltage is 1.22KV, and the phenol yellow is changed to be more than grade 4. See table 2 for details.
Example 18
Firstly, taking sheath component polyamide 56 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as core components, drying at 120 ℃ for 8 hours, respectively putting into each bin, controlling the discharge amount by a metering pump, passing through a spinning box and a spinning assembly, finally extruding by a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.33cN/dtex and an elongation at break of 35.8%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 11.8 percent, the friction withstand voltage is 0.98KV, and the phenol yellow is changed to be above grade 4. See table 2 for details.
Example 19
Firstly, taking sheath polyamide 610 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid and polyethylene glycol as core components, drying at 120 ℃ for 8 hours, respectively putting the core components and the sheath components into various bins, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, finally passing through a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 4.02cN/dtex and an elongation at break of 39.5%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 8.3 percent, the friction withstand voltage is 1.50KV, and the phenol yellow is changed into 4 grades. See table 3 for details.
Example 20
Firstly, taking sheath polyamide 610 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid and polyethylene glycol as core components, drying at 120 ℃ for 8 hours, respectively putting the core components and the sheath components into various bins, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, finally passing through a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.82cN/dtex and an elongation at break of 38.5%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 9.7 percent, the friction withstand voltage is 1.32KV, and the phenol yellow is changed into 4 grades. See table 3 for details.
Example 21
Firstly, taking sheath polyamide 610 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid and polyethylene glycol as core components, drying at 120 ℃ for 8 hours, respectively putting the core components and the sheath components into various bins, controlling the discharge amount by a metering pump, extruding through a spinning box and a spinning assembly, finally passing through a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.62cN/dtex and an elongation at break of 37.5%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 10.7 percent, the friction voltage resistance is 1.00KV, and the phenol yellow is changed into 4 grades. See table 3 for details.
Example 22
Firstly, taking sheath component polyamide 610 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as core components, drying at 120 ℃ for 8 hours, respectively putting into each bin, controlling the discharge amount by a metering pump, passing through a spinning box and a spinning assembly, finally extruding by a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 4.05cN/dtex and an elongation at break of 38.9%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 8.4 percent, the friction withstand voltage is 1.48KV, and the phenol yellow is changed to be above grade 4. See table 3 for details.
Example 23
Firstly, taking sheath component polyamide 610 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as core components, drying at 120 ℃ for 8 hours, respectively putting into each bin, controlling the discharge amount by a metering pump, passing through a spinning box and a spinning assembly, finally extruding by a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.85cN/dtex and an elongation at break of 38.9%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 10.1 percent, the friction withstand voltage is 1.24KV, and the phenol yellow is changed to be above grade 4. See table 3 for details.
Example 24
Firstly, taking sheath component polyamide 610 and a segmented amide copolymer obtained by copolymerizing caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as core components, drying at 120 ℃ for 8 hours, respectively putting into each bin, controlling the discharge amount by a metering pump, passing through a spinning box and a spinning assembly, finally extruding by a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min), and obtaining the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 3.65cN/dtex and an elongation at break of 36.9%.
The core-sheath composite fiber is made into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 4 grades. The moisture absorption rate Delta MR of the textile is 12.1 percent, the friction withstand voltage is 0.99KV, and the phenol yellow is changed to be above grade 4. See table 3 for details.
Comparative example 1
Firstly, drying polyamide 6 at 120 ℃ for 8 hours, putting the dried polyamide into a storage bin, controlling the temperature of each screw to be 270-290 ℃, controlling the discharge amount by a metering pump, and obtaining the FDY polyamide fiber by a spinning box body, a spinning assembly, finally extruding by a spinneret plate, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460 m/min). The resulting fiber was tested to have a tenacity at break of 4.95cN/dtex and an elongation at break of 42.9%.
The polyamide fiber is made into a textile, after the textile is dyed at 90 ℃ for 20min, the dye absorption rate reaches 75%, the light fastness and the rubbing color fastness of the textile are both 3 grades, the moisture absorption rate delta MR of the textile is 2.2%, the rubbing voltage resistance is 6.8KV, and the phenol yellow is changed into 2-3 grades. See table 3 for details.
Comparative example 2
Firstly, drying a block amide copolymer obtained by copolymerizing caprolactam, terephthalic acid and polyethylene glycol at the temperature of 120 ℃ for 8 hours, putting the block amide copolymer into each bin, controlling the temperature of each screw at 280-300 ℃, controlling the discharge amount by a metering pump, and finally extruding, cooling, feeding oil, interlacing, pre-drafting and curling (the curling speed is 4460m/min) by a spinneret plate through a spinning box body and a spinning assembly to obtain the FDY core-sheath composite fiber. The resulting fiber was tested to have a tenacity at break of 4.20cN/dtex and an elongation at break of 47.0%.
The core-sheath composite fiber is prepared into a textile, the absorption rate of the dye reaches 90% after the textile is dyed at 90 ℃ for 20min, and the light fastness and the rubbing color fastness of the textile are both 3 grades. The moisture absorption rate delta MR of the textile is 9.0 percent, the friction withstand voltage is 0.50KV, and the phenol yellow is changed into grade 2. See table 3 for details.
Comparative example 3
Firstly, taking sheath component polyamide 6 and block amide copolymer obtained by copolymerizing caprolactam, terephthalic acid and polyethylene glycol as core components, drying at 120 ℃ for 8 hours, respectively putting into each bin, wherein the core-sheath ratio is 90/10, the temperature of each screw is 270-290 ℃, the discharge amount is controlled by a metering pump, and extruding through a spinning box body, a spinning assembly and a spinneret plate. See table 3 for details.
TABLE 1
TABLE 2
TABLE 3
Claims (5)
1. A core-sheath composite fiber is characterized in that: the fiber consists of a core layer and a sheath layer, wherein the core component is a block amide copolymer, the block amide copolymer at least contains a polycaprolactam structural unit, a terephthalic acid structural unit, a polyethylene glycol structural unit and a bisphenol-A polyoxyethylene ether structural unit, and the sheath component is polyamide; the composite composition ratio of the core component to the sheath component is 10/90-70/30.
2. The core-sheath composite fiber according to claim 1, wherein: the sheath component polyamide is one of polyamide 6, polyamide 66, polyamide 56 or polyamide 610.
3. The core-sheath composite fiber according to claim 2, wherein: the sheath component polyamide is polyamide 6.
4. A method for producing the core-sheath composite fiber according to claim 1, characterized in that: the core-sheath composite fiber is prepared by using a core-sheath composite spinning component to spin and post-process, wherein the core-sheath composite fiber is prepared by using a block amide copolymer obtained by copolymerizing at least caprolactam, terephthalic acid, polyethylene glycol and bisphenol-A polyoxyethylene ether as a core component and polyamide as a sheath component, and the composite ratio of the core-sheath component is 10/90-70/30.
5. A textile obtained by using the core-sheath composite fiber according to any one of claims 1 to 3.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06136618A (en) * | 1992-10-26 | 1994-05-17 | Toray Ind Inc | Sheath-core type conjugate fiber excellent in hygroscopicity |
| CN103668553A (en) * | 2012-09-19 | 2014-03-26 | 东丽纤维研究所（中国）有限公司 | Blend fiber and production method and application thereof |
| CN105669969A (en) * | 2016-02-01 | 2016-06-15 | 东华大学 | Nylon 6 polymerization method and direct spinning method of melt of polymer obtained with nylon 6 polymerization method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06136618A (en) * | 1992-10-26 | 1994-05-17 | Toray Ind Inc | Sheath-core type conjugate fiber excellent in hygroscopicity |
| CN103668553A (en) * | 2012-09-19 | 2014-03-26 | 东丽纤维研究所（中国）有限公司 | Blend fiber and production method and application thereof |
| CN105669969A (en) * | 2016-02-01 | 2016-06-15 | 东华大学 | Nylon 6 polymerization method and direct spinning method of melt of polymer obtained with nylon 6 polymerization method |
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