CN111101235A - CDP/PET double-component composite filament by one-step method and preparation method thereof - Google Patents
CDP/PET double-component composite filament by one-step method and preparation method thereof Download PDFInfo
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- CN111101235A CN111101235A CN201911350190.9A CN201911350190A CN111101235A CN 111101235 A CN111101235 A CN 111101235A CN 201911350190 A CN201911350190 A CN 201911350190A CN 111101235 A CN111101235 A CN 111101235A
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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
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
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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
- D01D5/32—Side-by-side structure; Spinnerette packs therefor
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/061—Load-responsive characteristics elastic
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/14—Dyeability
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- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
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Abstract
The invention relates to a CDP/PET double-component composite filament of one-step process and its preparation method, according to FDY craft, distribute CDP and PET melt, extrude and make FDY filament from spinneret orifice m and n on the same spinneret, go on relax and heat treat to get final product; the CDP melt and the PET melt flow to a spinneret orifice m through a distribution orifice A, B and flow to a spinneret orifice n through a distribution orifice C, D, the difference between the apparent viscosities of the CDP melt and the PTT melt is not more than 5% at the inlet of the distribution orifice A, B, C, D, the distribution orifice A, B is a cylindrical orifice with the same height, the diameter ratio is 1.30-1.50: 1, the distribution orifice C, D is a cylindrical orifice with the same height, and the diameter ratio is 1: 1.30-1.50; the prepared composite filament is composed of a plurality of CDP/PET parallel composite filaments with different proportions, and the curling directions of the filaments in the composite filament are randomly distributed. The knitted fabric of the double-component composite yarn has no uneven strip shade.
Description
Technical Field
The invention belongs to the technical field of polyester fibers, and relates to a one-step CDP/PET double-component composite yarn and a preparation method thereof.
Background
With the continuous expansion of the application range of synthetic fibers and the development of spinning technology, various differentiated fibers with high added value, namely, the second generation synthetic fibers, have been developed and applied continuously in recent 20 years, wherein the composite spinning technology is particularly prominent. The composite fiber is prepared by distributing two or more fiber-forming polymer melts or solutions in a composite assembly composed of a plurality of distribution plates through respective melt or solution pipelines by utilizing different varieties, viscosities or proportions of the melts or solutions, converging the melts or solutions in various ways when reaching a spinneret plate to form a composite melt (solution) flow, and finally spraying the composite melt (solution) flow from the same spinneret hole to form one fiber. The composite spinning technology is an important technical means for physically modifying fibers, and plays an important role in developing new varieties of synthetic fibers with natural appearance and high added value.
CDP/PET composite fiber, it is the compounding among the congeners of the different fiber forming high polymer of performance, two components have more similar physical properties and better compatibility, it is difficult to produce the stripping between two phases, so two kinds of polymer have very good adhesion after forming fiber. The CDP/PET composite fiber has good dyeing property, elasticity and mechanical property, and has very wide application prospect in the field of garment materials.
However, the CDP/PET fibers present very problematic problems when applied in the knitting field: the woven knitted fabric has random strip shade-shaped unevenness on the surface, and particularly is more obvious on plain knitted fabrics, so that a plurality of knitted products cannot be popularized and applied, and the problem becomes a great obstacle for restricting the development and application of CDP/PET fiber knitted fabrics.
Therefore, the research on the CDP/PET parallel bicomponent fiber for avoiding the random strip shade unevenness and the preparation method thereof have very important significance.
Disclosure of Invention
The invention provides a one-step CDP/PET double-component composite filament and a preparation method thereof, and aims to solve the problem that random strip shade shape unevenness occurs when CDP/PET parallel composite fibers are applied to knitted fabric products in the prior art. According to the invention, a mode that CDP/PET parallel composite monofilaments with the mass ratio of CDP to PET being 3: 1-5: 1 and CDP/PET parallel composite monofilaments with the mass ratio of CDP to PET being 1: 3-1: 5 coexist in one bundle of yarns is adopted, and because the contraction modes and forms of the CDP/PET parallel composite monofilaments with the different mass ratios of CDP to PET are different, the problem that a bundle of CDP/PET parallel composite fibers form regular left and right spiral forms is broken through, and the problem that a knitted fabric made of the CDP/PET parallel composite fibers is uneven in strip shade is solved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
according to the FDY process, after CDP melt and PET melt are distributed, the CDP melt and the PET melt are extruded from a spinneret orifice m and a spinneret orifice n on the same spinneret plate to prepare FDY filaments, and then relaxation heat treatment is carried out to obtain the CDP/PET two-component composite filaments by the one-step method;
the distribution refers to distributing CDP melt into spinneret holes m through a distribution hole A, distributing PET melt into spinneret holes m through a distribution hole B, distributing CDP melt into spinneret holes C through a distribution hole C, and distributing PET melt into spinneret holes n through a distribution hole D;
at the inlet of the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D, the apparent viscosities of the PET melt and the CDP melt are different by no more than 5% (the apparent viscosities are determined by simulation, and are obtained by measuring the apparent viscosity of the polymer melt at a specific temperature by a rheometer);
the distribution hole A and the distribution hole B are equal-height cylindrical holes, the diameter ratio of the distribution hole A to the distribution hole B is 1.30-1.50: 1, the distribution hole C and the distribution hole D are equal-height cylindrical holes, and the diameter ratio of the distribution hole C to the distribution hole D is 1: 1.30-1.50.
Specifically, CDP melt is distributed through the distribution holes A and C and PET melt is distributed through the distribution holes B and D and is arranged at the inlets of the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D, the apparent viscosity difference of the PET melt and the CDP melt is not more than 5%, each distribution hole is a cylindrical hole with the same height, and the diameter ratio of the distribution hole A to the distribution hole B is not equal to the diameter ratio of the distribution hole C to the distribution hole D, so that the mass ratio of the CDP melt to the PET melt distributed into the spinning hole m and the mass ratio of the CDP melt to the PET melt distributed into the spinning hole n are different, two different mass ratios of CDP to PET exist in a bundle of CDP/PET parallel composite fibers, the different curling forms are ensured, and correspondingly, the quantity and position relations of the distribution holes and the guide holes are reasonably set so as to ensure the smooth distribution; the spinneret holes m and the spinneret holes n are distributed according to concentric circles, and the spinneret holes on the same circle are controlled to be m or n, so that a part of CDP/PET parallel composite monofilaments with the mass ratio of CDP to PET being 3: 1-5: 1 can be mixed into the middle of another part of CDP/PET parallel composite monofilaments with the mass ratio of CDP to PET being 1: 3-1: 5, and the effect of breaking the formation of a regular left and right spiral form is achieved; the temperature of the spinning manifold I, the temperature of the spinning manifold II and the temperature of the spinning manifold III are reasonably set, so that the temperature of the spinning manifold I, the temperature of the spinning manifold II and the temperature of the spinning manifold III can be matched with the intrinsic viscosity (0.55-0.60 dL/g) of the PET melt and the intrinsic viscosity (0.70-0.75 dL/g) of the CDP melt, the apparent viscosity of the PET component and the apparent viscosity of the CDP component extruded from a spinneret orifice are relatively close, the effect of controlling the mass ratio of parallel composite monofilaments is achieved, and the smooth spinning is guaranteed; the shape of the spinneret orifice is not required to be adjusted, and the commonly used parallel composite spinneret orifice is selected; the invention selects the FDY spinning process and reasonably sets the spinning process parameters, so that the prepared fiber has good crimpling performance, excellent elasticity and good comprehensive performance.
The principle of the invention is as follows:
the torsion stress generated by spiral curling of the prior CDP/PET parallel composite fiber is the same, so that the fiber on a part of yarn section generates a regular spiral curling surface morphology structure. Due to the difference of fiber inclination state and mechanical response behavior of each crimped yarn section of CDP/PET fiber, when the bi-component CDP/PET fiber is used for weaving fabric, the difference of yarn reflection effect and uneven tension can be caused, protrusions or depressions are randomly formed on the cloth surface, and uneven transverse striations with randomly changed brightness and darkness, namely uneven striped shade, can be found when the appearance is observed.
During the spinning process, the spinning melt is in continuous flow, and in order to better control the flow rate of the melt, the melt flow rate of the melt flowing in the circular tube is calculatedFormula (II):
wherein, Delta Q is the melt flow, d is the diameter of the round tube, mu is the apparent viscosity of the melt at the inlet of the round tube, l is the length of the round tube, and Delta P is the pressure drop of the melt after passing through the round tube, and as can be seen from the formula, when Delta P, mu and l are kept equal, the ratio of the melt flow flowing in the two round tubes is close to the ratio of the fourth power of the diameter of the round tube;
according to the FDY process, CDP melt and PET melt are distributed and then extruded from spinneret orifices m and spinneret orifices n on the same spinneret plate to prepare the parallel self-curling elastic fiber, wherein the distribution refers to that the CDP melt is distributed into the spinneret orifices m through a distribution hole A, the PET melt is distributed into the spinneret orifices m through a distribution hole B, the CDP melt is distributed into the distribution hole C, and the PET melt is distributed into the spinneret orifices n through a distribution hole D;
ratio of CDP melt flow through distribution holes A (or C) to PET melt flow through distribution holes B (or D)
Wherein Δ Q1, D1, μ 1, l1, Δ P1 correspond to dispensing hole a (or C), and Δ Q2, D2, μ 2, l2, Δ P2 correspond to dispensing hole B (or D); because the intrinsic viscosity of the CDP melt, the intrinsic viscosity of the PET melt, the temperature of the spinning beam I, the temperature of the spinning beam II and the temperature of the spinning beam III are matched with each other, the apparent viscosities of the PET melt and the CDP melt at the inlets of the distribution holes A and B are nearly identical (the difference is less than 5%), and the apparent viscosities of the PET melt and the CDP melt at the inlets of the distribution holes C and D are nearly identical (the difference is less than 5%), therefore mu 1 is approximately equal to mu 2; because the apparent viscosities of the PET melt and the CDP melt at the inlets of the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are different by no more than 5%, and the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are all arranged on the distribution plate and have smaller sizes, the pressure drop of the CDP melt after passing through the distribution hole A is basically the same as that of the PET melt after passing through the distribution hole B, the pressure drop of the CDP melt after passing through the distribution hole C is basically the same as that of the PET melt after passing through the distribution hole D, and therefore the delta P1 is approximately equal to the delta P2; due to the dispensing holeA and the dispensing hole B are equal in height, and the dispensing hole C and the dispensing hole D are equal in height, so that l1 is equal to l 2;
through the calculation, the method can know that,
and
approximately equal, the ratio of the diameter of the distribution hole A to the diameter of the distribution hole B is 1.30-1.50: 1, so that the ratio of the CDP melt flow flowing through the distribution hole A to the PET melt flow flowing through the distribution hole B is about 3: 1-5: 1, the mass ratio of the CDP melt flow to the PET melt flow in the monofilament extruded from the spinneret hole m is 3: 1-5: 1, and similarly, the ratio of the diameter of the distribution hole C to the diameter of the distribution hole D is 1: 1.30-1.50, so that the ratio of the CDP melt flow flowing through the distribution hole C to the PET melt flow flowing through the distribution hole D is about 1: 3-1: 5, and the mass ratio of the CDP melt flow to the PET melt flow in the monofilament extruded from the spinneret hole n is 1: 3-1: 5;
in addition, the CDP and PET adopted by the invention have different heat shrinkage rates, furthermore, after the CDP and the PET are mixed, the two polymers with different heat shrinkage rates have compatibility, the existence of the compatibility ensures that the polymers can be bonded together when passing through the same spinneret orifice (namely two fiber-forming polymer melts are distributed together according to a parallel composite spinning mode and then extruded), and the bonding effect and the different heat shrinkage rates have the effect that two polymer fibers (namely CDP/PET parallel composite monofilaments) coming out of the same spinneret orifice can form a self-curling shape after relaxation heat treatment, thereby having elasticity, and the self-curling shape is specifically: CDP component is in the inner side of spiral crimp, PET component is in the outer side of spiral crimp (according to the rigidity and flexibility characteristics of CDP and PET molecules, the shrinkage rate of CDP is larger, and the shrinkage rate of PET is smaller, so that CDP component in the composite fiber is in the inner side of spiral crimp, and PET component is in the outer side of spiral crimp);
in the same fiber bundle, the mass ratio of CDP to PET in one part of CDP/PET parallel composite monofilaments is 3: 1-5: 1, and the mass ratio of CDP to PET in the other part of CDP/PET parallel composite monofilaments is 1: 3-1: 5, so that the curling forms of different monofilaments have certain difference, the difference plays a role of breaking the neat left and right spiral forms formed by pure CDP/PET parallel composite monofilaments, the curling directions of the monofilaments of the prepared parallel double-component composite monofilaments after relaxation heat treatment are randomly distributed, and the surface of a knitted fabric woven by the double-component composite monofilaments cannot have random 'strip shade unevenness'.
As a preferred technical scheme:
according to the preparation method of the one-step CDP/PET double-component composite filament, the mass ratio of the PET melt to the CDP melt is 50: 50.
In the preparation method of the CDP/PET bicomponent composite filament by the one-step method, the spinneret holes m or n are round, oval or 8-shaped spinneret holes.
According to the preparation method of the CDP/PET double-component composite filament by the one-step method, all the spinneret holes are distributed in concentric circles, and the spinneret holes on the same circle are m or n, so that the CDP/PET parallel composite filament with the CDP-PET mass ratio of 3: 1-5: 1 can be mixed into the PTT/PET parallel composite filament with the CDP-PET mass ratio of 1: 3-1: 5, and the effect of breaking the formation of a neat left and right spiral form is achieved.
The preparation method of the CDP/PET bicomponent composite filament by the one-step method comprises the steps that a spinneret orifice m is formed by a guide hole E, a transition hole and a capillary micropore which are connected in sequence, a spinneret orifice n is formed by a guide hole F, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is simultaneously connected with a distribution hole A and a distribution hole B, and the guide hole F is simultaneously connected with a distribution hole C and a distribution hole D; the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are positioned on the distribution plate in the spinning beam III, the PET melt is conveyed to the distribution hole B and the distribution hole D through the spinning beam I, and the CDP melt is conveyed to the distribution hole A and the distribution hole C through the spinning beam II.
According to the preparation method of the CDP/PET double-component composite filament by the one-step method, the intrinsic viscosity of the PET melt is 0.55-0.60 dL/g, the temperature of the spinning box I is 280-285 ℃, the intrinsic viscosity of the CDP melt is 0.70-0.75 dL/g, the temperature of the spinning box II is 275-280 ℃, and the temperature of the spinning box III (the temperature of the spinning box III is the spinning temperature) is 278-282 ℃.
According to the preparation method of the CDP/PET double-component composite filament by the one-step method, the parameters of the FDY process are as follows: the cooling temperature is 23-25 ℃, the network pressure is 0.20-0.30 MPa, the speed of one roller is 2400-2500 m/min, the temperature of one roller is 90-95 ℃, the speed of two rollers is 4000-4200 m/min, the temperature of two rollers is 160-180 ℃, and the winding speed is 3930-4120 m/min; the temperature of the relaxation heat treatment is 90-120 ℃, and the time is 20-30 min.
The invention also provides the one-step CDP/PET two-component composite filament prepared by the one-step CDP/PET two-component composite filament preparation method, which consists of a plurality of PET/CDP parallel composite filaments, wherein in the same fiber bundle, the mass ratio of CDP to PET in one part of PET/CDP parallel composite filaments is 3: 1-5: 1, and the mass ratio of CDP to PET in the other part of PET/CDP parallel composite filaments is 1: 3-1: 5; the single filament curling directions in the CDP/PET double-component composite filament in the one-step method are randomly distributed.
As a preferred technical scheme:
according to the CDP/PET double-component composite filament prepared by the one-step method, the one-step CDP/PET double-component composite filament has the crimping shrinkage rate of 48-53%, the crimping stability of 80-83%, the shrinkage elongation of 90-93% and the crimp elastic recovery of 88-92%.
The CDP/PET bicomponent composite filament prepared by the one-step method has the breaking strength of 2.7-3.0 cN/dtex, the elongation at break of 40.0 +/-4.0% and the total titer of 100-200 dtex.
The CDP/PET double-component composite yarn prepared by the one-step method is prepared into a knitted fabric for strip-shaped uneven condition testing, and the testing process comprises the following steps: firstly, acquiring the knitted fabric image and converting the knitted fabric image into a gray image, then carrying out first processing and second processing on the gray image and then calculating a parameter D, and representing the uneven degree of the strip shade shape by using the parameter D, wherein the gray image comprises a strip shade area, a high gray value area of a non-strip shade area and a low gray value area of the non-strip shade area; the first processing is to change the pixel points of the high gray value area of the non-strip shadow area in the gray image into pure white points; the second processing is to change the pixel points of the low gray value area of the non-shadow area in the gray image into pure white points; the calculation formula of the parameter D is as follows: d ═ Σ B/a, where Σ B represents the number of pixels having a gray scale value of 0 in the grayscale image, and a represents the total number of pixels in the grayscale image.
If the D value is more than or equal to 3%, the strip shade unevenness can be judged to appear, and if the D value is more than or equal to 10%, the strip shade unevenness can be judged to appear seriously. The test result of the knitted fabric made of the CDP/PET double-component composite yarn by the one-step method of the invention is as follows: d value of the knitted fabric made of the CDP/PET double-component composite yarn by the one-step method is less than or equal to 1.0 percent; this shows that the CDP/PET bicomponent composite filament prepared by the one-step method of the invention does not have the problem of uneven strip shade.
Has the advantages that:
(1) according to the one-step CDP/PET double-component composite filament preparation method, distribution holes with different diameters are adopted, so that the obtained parallel composite fibers contain different component ratios, the generation of a neat and spiral curled surface morphological structure of the fibers is avoided, and strip shade unevenness is avoided;
(2) the CDP/PET double-component composite filament prepared by the one-step CDP/PET double-component composite filament preparation method has the advantages of good dyeing property, good crimpling property, good elasticity, excellent comprehensive property and wide application range.
Drawings
FIG. 1 is a schematic view of the melt distribution of the present invention; a, B, C, D are independent distribution holes, E, F are independent guide holes.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The crimp shrinkage and crimp stability of the invention are obtained by testing the tow in GB6506-2001 synthetic fiber textured yarn crimp performance test method;
the method for testing the shrinkage elongation (reflecting the elasticity and the crimp degree of the deformed filament, the fiber is firstly loaded under light load and then loaded under heavy load, and the ratio of the length difference value under the two loads to the crimp length) and the crimp elastic recovery rate is as follows:
firstly, cutting two fiber samples with the length of about 50cm, putting the two fiber samples into hot water with the temperature of 100 ℃ for treatment for 30min, taking out the two fiber samples, naturally drying the two fiber samples, then cutting the sample with the length of about 30cm, fixing one end of the sample, loading a load of 0.0018cN/dtex on the other end of the sample, continuing for 30s, marking the sample at the position of 20cm, and obtaining the initial length l of the sample1(ii) a Then, the load of 0.09cN/dtex is loaded for 30s, and the position of the mark point is measured, namely the length l when the sample is loaded with heavy load2(ii) a Finally, removing the heavy load, retracting the sample for 2min without load, then adding the load of 0.0018cN/dtex, continuing for 30s, and measuring the position of the mark point on the scale, namely the recovery length l3(ii) a The percent elongation at Compression (CE) and the elastic recovery from crimp (SR) are calculated as follows:
CE＝(l2-l1)/l1；
SR＝(l2-l3)/(l2-l1)。
example 1
The preparation method of the CDP/PET double-component composite filament by the one-step method comprises the following steps:
(1) distributing CDP melt (intrinsic viscosity is 0.73dL/g) and PET melt (intrinsic viscosity is 0.56dL/g) with the mass ratio of 50:50 according to an FDY process, and extruding from a spinneret orifice m (circle) and a spinneret orifice n (circle) on the same spinneret plate to prepare FDY filaments;
as shown in fig. 1, the distribution means that CDP melt is distributed into a spinneret hole m through a distribution hole a, PET melt is distributed into a spinneret hole m through a distribution hole B, CDP melt is distributed into a spinneret hole C through a distribution hole C, and PET melt is distributed into a spinneret hole n through a distribution hole D;
the distribution hole A and the distribution hole B are cylindrical holes with equal heights, the diameter ratio of the distribution hole A to the distribution hole B is 1.5:1, the distribution hole C and the distribution hole D are cylindrical holes with equal heights, and the diameter ratio of the distribution hole C to the distribution hole D is 1: 1.5;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole F, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is simultaneously connected with the distribution hole A and the distribution hole B, and the guide hole F is simultaneously connected with the distribution hole C and the distribution hole D; the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are positioned on the distribution plate in the spinning manifold III, the PET melt is conveyed to the distribution hole B and the distribution hole D through the spinning manifold I, and the CDP melt is conveyed to the distribution hole A and the distribution hole C through the spinning manifold II; the temperature of the spinning beam I is 282 ℃, the temperature of the spinning beam II is 279 ℃, and the temperature of the spinning beam III is 280 ℃;
at the inlets of the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D, the apparent viscosities of the PET melt and the CDP melt are different by 5%;
all the spinneret orifices are distributed in concentric circles, and the spinneret orifices on the same circle are all m or all n;
the parameters of the FDY process are as follows: the cooling temperature is 25 ℃, the network pressure is 0.3MPa, the one-roll speed is 2430m/min, the one-roll temperature is 94 ℃, the two-roll speed is 4000m/min, the two-roll temperature is 164 ℃, and the winding speed is 3930 m/min;
(2) performing relaxation heat treatment at 97 deg.C for 27min to obtain CDP/PET bicomponent composite filament by one-step method;
the prepared CDP/PET double-component composite filament of the one-step method is composed of a plurality of PET/CDP parallel composite filaments, and the single filaments in the CDP/PET double-component composite filament of the one-step method are randomly distributed in the curling direction; the CDP/PET double-component composite filament prepared by the one-step method has the crimping shrinkage rate of 52 percent, the crimping stability of 80 percent, the shrinkage elongation of 91 percent and the crimping elastic recovery rate of 92 percent; the breaking strength of the CDP/PET bicomponent composite filament of the one-step method is 2.7cN/dtex, the elongation at break is 44 percent, and the total titer is 108 dtex.
Example 2
The preparation method of the CDP/PET double-component composite filament by the one-step method comprises the following steps:
(1) distributing CDP melt (intrinsic viscosity is 0.73dL/g) and PET melt (intrinsic viscosity is 0.6dL/g) with the mass ratio of 50:50 according to an FDY process, and extruding from a spinneret orifice m (circle) and a spinneret orifice n (circle) on the same spinneret plate to prepare FDY filaments;
the CDP melt is distributed into the spinneret holes m through the distribution hole A, the PET melt is distributed into the spinneret holes m through the distribution hole B, the CDP melt is distributed into the spinneret holes n through the distribution hole C, and the PET melt is distributed into the spinneret holes n through the distribution hole D;
the distribution hole A and the distribution hole B are cylindrical holes with equal heights, the diameter ratio of the distribution hole A to the distribution hole B is 1.3:1, the distribution hole C and the distribution hole D are cylindrical holes with equal heights, and the diameter ratio of the distribution hole C to the distribution hole D is 1: 1.3;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole F, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is simultaneously connected with the distribution hole A and the distribution hole B, and the guide hole F is simultaneously connected with the distribution hole C and the distribution hole D; the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are positioned on the distribution plate in the spinning manifold III, the PET melt is conveyed to the distribution hole B and the distribution hole D through the spinning manifold I, and the CDP melt is conveyed to the distribution hole A and the distribution hole C through the spinning manifold II; the temperature of the spinning manifold I is 285 ℃, the temperature of the spinning manifold II is 279 ℃, and the temperature of the spinning manifold III is 282 ℃;
the apparent viscosities of the PET melt and the CDP melt at the inlets of the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are different by 4.9%;
all the spinneret orifices are distributed in concentric circles, and the spinneret orifices on the same circle are all m or all n;
the parameters of the FDY process are as follows: the cooling temperature is 25 ℃, the network pressure is 0.3MPa, the speed of one roller is 2500m/min, the temperature of one roller is 95 ℃, the speed of two rollers is 4140m/min, the temperature of two rollers is 176 ℃, and the winding speed is 4070 m/min;
(2) performing relaxation heat treatment at 119 deg.C for 21min to obtain CDP/PET bicomponent composite filament by one-step method;
the prepared CDP/PET double-component composite filament of the one-step method is composed of a plurality of PET/CDP parallel composite filaments, and the single filaments in the CDP/PET double-component composite filament of the one-step method are randomly distributed in the curling direction; the CDP/PET double-component composite filament prepared by the one-step method has the crimping shrinkage rate of 50%, the crimping stability of 82%, the shrinkage elongation of 90% and the crimping elastic recovery rate of 90%; the one-step CDP/PET bicomponent composite filament has the breaking strength of 2.7cN/dtex, the elongation at break of 41 percent and the total titer of 108 dtex.
Example 3
The preparation method of the CDP/PET double-component composite filament by the one-step method comprises the following steps:
(1) distributing CDP melt (intrinsic viscosity is 0.75dL/g) and PET melt (intrinsic viscosity is 0.57dL/g) with the mass ratio of 50:50 according to an FDY process, and extruding from a spinneret orifice m (circle) and a spinneret orifice n (circle) on the same spinneret plate to prepare FDY filaments;
the CDP melt is distributed into the spinneret holes m through the distribution hole A, the PET melt is distributed into the spinneret holes m through the distribution hole B, the CDP melt is distributed into the spinneret holes n through the distribution hole C, and the PET melt is distributed into the spinneret holes n through the distribution hole D;
the distribution hole A and the distribution hole B are cylindrical holes with equal heights, the diameter ratio of the distribution hole A to the distribution hole B is 1.4:1, the distribution hole C and the distribution hole D are cylindrical holes with equal heights, and the diameter ratio of the distribution hole C to the distribution hole D is 1: 1.4;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole F, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is simultaneously connected with the distribution hole A and the distribution hole B, and the guide hole F is simultaneously connected with the distribution hole C and the distribution hole D; the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are positioned on the distribution plate in the spinning manifold III, the PET melt is conveyed to the distribution hole B and the distribution hole D through the spinning manifold I, and the CDP melt is conveyed to the distribution hole A and the distribution hole C through the spinning manifold II; the temperature of the spinning manifold I is 283 ℃, the temperature of the spinning manifold II is 280 ℃, and the temperature of the spinning manifold III is 281 ℃;
the apparent viscosities of the PET melt and the CDP melt at the inlets of the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are different by 4.8%;
all the spinneret orifices are distributed in concentric circles, and the spinneret orifices on the same circle are all m or all n;
the parameters of the FDY process are as follows: the cooling temperature is 23 ℃, the network pressure is 0.2MPa, the speed of one roller is 2480m/min, the temperature of one roller is 92 ℃, the speed of two rollers is 4170m/min, the temperature of two rollers is 180 ℃, and the winding speed is 4100 m/min;
(2) performing relaxation heat treatment at 90 ℃ for 30min to obtain a CDP/PET double-component composite filament by a one-step method;
the prepared CDP/PET double-component composite filament of the one-step method is composed of a plurality of PET/CDP parallel composite filaments, and the single filaments in the CDP/PET double-component composite filament of the one-step method are randomly distributed in the curling direction; the CDP/PET bicomponent composite filament of the one-step method has the crimping shrinkage rate of 53 percent, the crimping stability of 80 percent, the contraction elongation of 92 percent and the crimping elastic recovery rate of 92 percent; the one-step CDP/PET bicomponent composite filament has the breaking strength of 2.7cN/dtex, the elongation at break of 40 percent and the total titer of 124 dtex.
Example 4
The preparation method of the CDP/PET double-component composite filament by the one-step method comprises the following steps:
(1) distributing CDP melt (intrinsic viscosity is 0.7dL/g) and PET melt (intrinsic viscosity is 0.57dL/g) with the mass ratio of 50:50 according to an FDY process, and extruding from a spinneret orifice m (circle) and a spinneret orifice n (circle) on the same spinneret plate to prepare FDY filaments;
the CDP melt is distributed into the spinneret holes m through the distribution hole A, the PET melt is distributed into the spinneret holes m through the distribution hole B, the CDP melt is distributed into the spinneret holes n through the distribution hole C, and the PET melt is distributed into the spinneret holes n through the distribution hole D;
the distribution hole A and the distribution hole B are cylindrical holes with equal heights, the diameter ratio of the distribution hole A to the distribution hole B is 1.4:1, the distribution hole C and the distribution hole D are cylindrical holes with equal heights, and the diameter ratio of the distribution hole C to the distribution hole D is 1: 1.4;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole F, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is simultaneously connected with the distribution hole A and the distribution hole B, and the guide hole F is simultaneously connected with the distribution hole C and the distribution hole D; the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are positioned on the distribution plate in the spinning manifold III, the PET melt is conveyed to the distribution hole B and the distribution hole D through the spinning manifold I, and the CDP melt is conveyed to the distribution hole A and the distribution hole C through the spinning manifold II; the temperature of the spinning manifold I is 283 ℃, the temperature of the spinning manifold II is 275 ℃, and the temperature of the spinning manifold III is 282 ℃;
the apparent viscosities of the PET melt and the CDP melt at the inlets of the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are different by 4.9%;
all the spinneret orifices are distributed in concentric circles, and the spinneret orifices on the same circle are all m or all n;
the parameters of the FDY process are as follows: the cooling temperature is 24 ℃, the network pressure is 0.3MPa, the speed of one roller is 2400m/min, the temperature of one roller is 90 ℃, the speed of two rollers is 4100m/min, the temperature of two rollers is 160 ℃, and the winding speed is 4030 m/min;
(2) performing relaxation heat treatment at 95 ℃ for 28min to obtain a CDP/PET double-component composite filament by a one-step method;
the prepared CDP/PET double-component composite filament of the one-step method is composed of a plurality of PET/CDP parallel composite filaments, and the single filaments in the CDP/PET double-component composite filament of the one-step method are randomly distributed in the curling direction; the CDP/PET double-component composite filament prepared by the one-step method has the crimping shrinkage rate of 49 percent, the crimping stability of 80 percent, the shrinkage elongation of 92 percent and the crimp elastic recovery rate of 89 percent; the breaking strength of the CDP/PET bicomponent composite filament of the one-step method is 2.7cN/dtex, the elongation at break is 39 percent, and the total titer is 108 dtex.
Example 5
The preparation method of the CDP/PET double-component composite filament by the one-step method comprises the following steps:
(1) distributing CDP melt (intrinsic viscosity is 0.72dL/g) and PET melt (intrinsic viscosity is 0.6dL/g) with the mass ratio of 50:50 according to an FDY process, and extruding from a spinneret orifice m (circle) and a spinneret orifice n (circle) on the same spinneret plate to prepare FDY filaments;
the CDP melt is distributed into the spinneret holes m through the distribution hole A, the PET melt is distributed into the spinneret holes m through the distribution hole B, the CDP melt is distributed into the spinneret holes n through the distribution hole C, and the PET melt is distributed into the spinneret holes n through the distribution hole D;
the distribution hole A and the distribution hole B are cylindrical holes with equal heights, the diameter ratio of the distribution hole A to the distribution hole B is 1.5:1, the distribution hole C and the distribution hole D are cylindrical holes with equal heights, and the diameter ratio of the distribution hole C to the distribution hole D is 1: 1.5;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole F, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is simultaneously connected with the distribution hole A and the distribution hole B, and the guide hole F is simultaneously connected with the distribution hole C and the distribution hole D; the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are positioned on the distribution plate in the spinning manifold III, the PET melt is conveyed to the distribution hole B and the distribution hole D through the spinning manifold I, and the CDP melt is conveyed to the distribution hole A and the distribution hole C through the spinning manifold II; the temperature of the spinning manifold I is 283 ℃, the temperature of the spinning manifold II is 277 ℃, and the temperature of the spinning manifold III is 278 ℃;
the apparent viscosities of the PET melt and the CDP melt at the inlets of the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are different by 4.7%;
all the spinneret orifices are distributed in concentric circles, and the spinneret orifices on the same circle are all m or all n;
the parameters of the FDY process are as follows: the cooling temperature is 25 ℃, the network pressure is 0.2MPa, the speed of one roller is 2490m/min, the temperature of one roller is 91 ℃, the speed of two rollers is 4190m/min, the temperature of two rollers is 168 ℃, and the winding speed is 4120 m/min;
(2) carrying out relaxation heat treatment at the temperature of 102 ℃ for 25min to obtain a CDP/PET double-component composite filament by a one-step method;
the prepared CDP/PET double-component composite filament of the one-step method is composed of a plurality of PET/CDP parallel composite filaments, and the single filaments in the CDP/PET double-component composite filament of the one-step method are randomly distributed in the curling direction; the CDP/PET double-component composite filament prepared by the one-step method has the crimping shrinkage rate of 48 percent, the crimping stability of 80 percent, the contraction elongation of 93 percent and the crimping elastic recovery rate of 88 percent; the one-step CDP/PET bicomponent composite filament has the breaking strength of 2.7cN/dtex, the elongation at break of 39 percent and the total titer of 100 dtex.
Example 6
The preparation method of the CDP/PET double-component composite filament by the one-step method comprises the following steps:
(1) distributing CDP melt (intrinsic viscosity is 0.72dL/g) and PET melt (intrinsic viscosity is 0.58dL/g) with the mass ratio of 50:50 according to an FDY process, and extruding from a spinneret orifice m (circle) and a spinneret orifice n (circle) on the same spinneret plate to prepare FDY filaments;
the CDP melt is distributed into the spinneret holes m through the distribution hole A, the PET melt is distributed into the spinneret holes m through the distribution hole B, the CDP melt is distributed into the spinneret holes n through the distribution hole C, and the PET melt is distributed into the spinneret holes n through the distribution hole D;
the distribution hole A and the distribution hole B are cylindrical holes with equal heights, the diameter ratio of the distribution hole A to the distribution hole B is 1.3:1, the distribution hole C and the distribution hole D are cylindrical holes with equal heights, and the diameter ratio of the distribution hole C to the distribution hole D is 1: 1.3;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole F, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is simultaneously connected with the distribution hole A and the distribution hole B, and the guide hole F is simultaneously connected with the distribution hole C and the distribution hole D; the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are positioned on the distribution plate in the spinning manifold III, the PET melt is conveyed to the distribution hole B and the distribution hole D through the spinning manifold I, and the CDP melt is conveyed to the distribution hole A and the distribution hole C through the spinning manifold II; the temperature of the spinning manifold I is 283 ℃, the temperature of the spinning manifold II is 277 ℃, and the temperature of the spinning manifold III is 281 ℃;
the apparent viscosities of the PET melt and the CDP melt at the inlets of the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are different by 4.6%;
all the spinneret orifices are distributed in concentric circles, and the spinneret orifices on the same circle are all m or all n;
the parameters of the FDY process are as follows: the cooling temperature is 25 ℃, the network pressure is 0.2MPa, the speed of one roller is 2440m/min, the temperature of one roller is 93 ℃, the speed of two rollers is 4150m/min, the temperature of two rollers is 176 ℃, and the winding speed is 4080 m/min;
(2) performing relaxation heat treatment at 110 ℃ for 23min to obtain a one-step CDP/PET double-component composite filament;
the prepared CDP/PET double-component composite filament of the one-step method is composed of a plurality of PET/CDP parallel composite filaments, and the single filaments in the CDP/PET double-component composite filament of the one-step method are randomly distributed in the curling direction; the CDP/PET double-component composite filament prepared by the one-step method has the crimping shrinkage rate of 50%, the crimping stability of 81%, the shrinkage elongation of 93% and the crimping elastic recovery rate of 90%; the one-step CDP/PET bicomponent composite filament has the breaking strength of 2.9cN/dtex, the elongation at break of 38 percent and the total titer of 132 dtex.
Example 7
The preparation method of the CDP/PET double-component composite filament by the one-step method comprises the following steps:
(1) distributing CDP melt (intrinsic viscosity is 0.7dL/g) and PET melt (intrinsic viscosity is 0.58dL/g) with the mass ratio of 50:50 according to an FDY process, and extruding from a spinneret orifice m (oval) and a spinneret orifice n (round) on the same spinneret plate to prepare FDY filaments;
the CDP melt is distributed into the spinneret holes m through the distribution hole A, the PET melt is distributed into the spinneret holes m through the distribution hole B, the CDP melt is distributed into the spinneret holes n through the distribution hole C, and the PET melt is distributed into the spinneret holes n through the distribution hole D;
the distribution hole A and the distribution hole B are cylindrical holes with equal heights, the diameter ratio of the distribution hole A to the distribution hole B is 1.3:1, the distribution hole C and the distribution hole D are cylindrical holes with equal heights, and the diameter ratio of the distribution hole C to the distribution hole D is 1: 1.3;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole F, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is simultaneously connected with the distribution hole A and the distribution hole B, and the guide hole F is simultaneously connected with the distribution hole C and the distribution hole D; the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are positioned on the distribution plate in the spinning manifold III, the PET melt is conveyed to the distribution hole B and the distribution hole D through the spinning manifold I, and the CDP melt is conveyed to the distribution hole A and the distribution hole C through the spinning manifold II; the temperature of the spinning manifold I is 283 ℃, the temperature of the spinning manifold II is 276 ℃, and the temperature of the spinning manifold III is 282 ℃;
the apparent viscosities of the PET melt and the CDP melt at the inlets of the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are different by 4.5%;
all the spinneret orifices are distributed in concentric circles, and the spinneret orifices on the same circle are all m or all n;
the parameters of the FDY process are as follows: the cooling temperature is 25 ℃, the network pressure is 0.3MPa, the speed of one roller is 2450m/min, the temperature of one roller is 93 ℃, the speed of two rollers is 4180m/min, the temperature of two rollers is 173 ℃, and the winding speed is 4110 m/min;
(2) performing relaxation heat treatment at 111 ℃ for 22min to obtain a one-step CDP/PET double-component composite filament;
the prepared CDP/PET double-component composite filament of the one-step method is composed of a plurality of PET/CDP parallel composite filaments, and the single filaments in the CDP/PET double-component composite filament of the one-step method are randomly distributed in the curling direction; the CDP/PET bicomponent composite filament of the one-step method has the crimping shrinkage rate of 48 percent, the crimping stability of 82 percent, the contraction elongation of 92 percent and the crimping elastic recovery rate of 88 percent; the one-step CDP/PET bicomponent composite filament has the breaking strength of 2.9cN/dtex, the elongation at break of 38 percent and the total titer of 160 dtex.
Example 8
The preparation method of the CDP/PET double-component composite filament by the one-step method comprises the following steps:
(1) distributing CDP melt (intrinsic viscosity is 0.7dL/g) and PET melt (intrinsic viscosity is 0.56dL/g) with the mass ratio of 50:50 according to an FDY process, and extruding from a spinneret orifice m (round) and a spinneret orifice n (8-shaped) on the same spinneret plate to prepare FDY filaments;
the CDP melt is distributed into the spinneret holes m through the distribution hole A, the PET melt is distributed into the spinneret holes m through the distribution hole B, the CDP melt is distributed into the spinneret holes n through the distribution hole C, and the PET melt is distributed into the spinneret holes n through the distribution hole D;
the distribution hole A and the distribution hole B are cylindrical holes with equal heights, the diameter ratio of the distribution hole A to the distribution hole B is 1.4:1, the distribution hole C and the distribution hole D are cylindrical holes with equal heights, and the diameter ratio of the distribution hole C to the distribution hole D is 1: 1.4;
the spinneret orifice m is composed of a guide hole E, a transition hole and a capillary micropore which are connected in sequence, the spinneret orifice n is composed of a guide hole F, a transition hole and a capillary micropore which are connected in sequence, the guide hole E is simultaneously connected with the distribution hole A and the distribution hole B, and the guide hole F is simultaneously connected with the distribution hole C and the distribution hole D; the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are positioned on the distribution plate in the spinning manifold III, the PET melt is conveyed to the distribution hole B and the distribution hole D through the spinning manifold I, and the CDP melt is conveyed to the distribution hole A and the distribution hole C through the spinning manifold II; the temperature of the spinning manifold I is 280 ℃, the temperature of the spinning manifold II is 275 ℃, and the temperature of the spinning manifold III is 278 ℃;
the apparent viscosities of the PET melt and the CDP melt at the inlets of the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are different by 4.7%;
all the spinneret orifices are distributed in concentric circles, and the spinneret orifices on the same circle are all m or all n;
the parameters of the FDY process are as follows: the cooling temperature is 23 ℃, the network pressure is 0.3MPa, the one-roll speed is 2410m/min, the one-roll temperature is 91 ℃, the two-roll speed is 4200m/min, the two-roll temperature is 170 ℃, and the winding speed is 4120 m/min;
(2) performing relaxation heat treatment at 120 ℃ for 20min to obtain a CDP/PET two-component composite filament by a one-step method;
the prepared CDP/PET double-component composite filament of the one-step method is composed of a plurality of PET/CDP parallel composite filaments, and the single filaments in the CDP/PET double-component composite filament of the one-step method are randomly distributed in the curling direction; the CDP/PET double-component composite filament prepared by the one-step method has the crimping shrinkage rate of 50%, the crimping stability of 83%, the shrinkage elongation of 91% and the crimping elastic recovery rate of 90%; the one-step CDP/PET bicomponent composite filament has the breaking strength of 3cN/dtex, the elongation at break of 36 percent and the total titer of 200 dtex.
Claims (10)
1. The preparation method of the CDP/PET double-component composite filament by the one-step method is characterized by comprising the following steps: according to the FDY process, after CDP melt and PET melt are distributed, FDY filaments are extruded from a spinneret orifice m and a spinneret orifice n on the same spinneret plate and then are subjected to relaxation heat treatment, and the CDP/PET bicomponent composite filaments obtained by the one-step method are obtained;
the distribution refers to distributing CDP melt into spinneret holes m through a distribution hole A, distributing PET melt into spinneret holes m through a distribution hole B, distributing CDP melt into spinneret holes C through a distribution hole C, and distributing PET melt into spinneret holes n through a distribution hole D;
at the inlets of the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D, the apparent viscosities of the PET melt and the CDP melt are different by no more than 5%;
the distribution hole A and the distribution hole B are equal-height cylindrical holes, the diameter ratio of the distribution hole A to the distribution hole B is 1.30-1.50: 1, the distribution hole C and the distribution hole D are equal-height cylindrical holes, and the diameter ratio of the distribution hole C to the distribution hole D is 1: 1.30-1.50.
2. The method of claim 1, wherein the ratio of the PET melt to the CDP melt is 50: 50.
3. The method of claim 1, wherein the spinneret hole m or the spinneret hole n is a circular, oval or "8" shaped spinneret hole.
4. The method of claim 1, wherein all the orifices are arranged in concentric circles, and the orifices on the same circle are either m or n.
5. The method of claim 1, wherein the spinneret hole m is formed by a guide hole E, a transition hole and a capillary hole, which are connected in sequence, the spinneret hole n is formed by a guide hole F, a transition hole and a capillary hole, which are connected in sequence, the guide hole E is connected to the distribution hole a and the distribution hole B, and the guide hole F is connected to the distribution hole C and the distribution hole D; the distribution hole A, the distribution hole B, the distribution hole C and the distribution hole D are positioned on the distribution plate in the spinning beam III, the PET melt is conveyed to the distribution hole B and the distribution hole D through the spinning beam I, and the CDP melt is conveyed to the distribution hole A and the distribution hole C through the spinning beam II.
6. The preparation method of the CDP/PET double-component composite filament according to the claim 5, wherein the intrinsic viscosity of the PET melt is 0.55-0.60 dL/g, the temperature of the spinning beam I is 280-285 ℃, the intrinsic viscosity of the CDP melt is 0.70-0.75 dL/g, the temperature of the spinning beam II is 275-280 ℃, and the temperature of the spinning beam III is 278-282 ℃.
7. The method of claim 6, wherein the FDY process parameters are as follows: the cooling temperature is 23-25 ℃, the network pressure is 0.20-0.30 MPa, the speed of one roller is 2400-2500 m/min, the temperature of one roller is 90-95 ℃, the speed of two rollers is 4000-4200 m/min, the temperature of two rollers is 160-180 ℃, and the winding speed is 3930-4120 m/min; the temperature of the relaxation heat treatment is 90-120 ℃, and the time is 20-30 min.
8. The one-step CDP/PET two-component composite filament prepared by the one-step CDP/PET two-component composite filament preparation method according to any one of claims 1 to 7 is characterized in that: the PET/CDP parallel composite monofilament consists of a plurality of PET/CDP parallel composite monofilaments, in the same fiber bundle, the mass ratio of CDP to PET in one part of PET/CDP parallel composite monofilaments is 3: 1-5: 1, and the mass ratio of CDP to PET in the other part of PET/CDP parallel composite monofilaments is 1: 3-1: 5; the single filament curling directions in the CDP/PET double-component composite filament in the one-step method are randomly distributed.
9. The one-step CDP/PET bicomponent composite filament according to claim 8, wherein the one-step CDP/PET bicomponent composite filament has a crimp shrinkage of 48-53%, a crimp stability of 80-83%, a shrinkage elongation of 90-93%, and a crimp elastic recovery of 88-92%.
10. The one-step CDP/PET bicomponent composite filament according to claim 8, wherein the one-step CDP/PET bicomponent composite filament has a breaking strength of 2.7-3.0 cN/dtex, an elongation at break of 40.0 ± 4.0%, and a total fineness of 100-200 dtex.
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| CN201911350190.9A CN111101235B (en) | 2019-12-24 | 2019-12-24 | CDP/PET double-component composite filament by one-step method and preparation method thereof |
| KR1020217039345A KR102482996B1 (en) | 2019-12-24 | 2020-06-10 | Single process CDP/PET bicomponent composite yarn and its manufacturing method |
| JP2022535862A JP7255029B2 (en) | 2019-12-24 | 2020-06-10 | Method for producing CDP/PET bicomponent side-by-side composite fiber by direct drawing method |
| PCT/CN2020/095362 WO2021128750A1 (en) | 2019-12-24 | 2020-06-10 | One-step cdp/pet two-component composite filament and preparation method therefor |
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| WO2021128750A1 (en) * | 2019-12-24 | 2021-07-01 | 江苏恒力化纤股份有限公司 | One-step cdp/pet two-component composite filament and preparation method therefor |
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| WO2021128750A1 (en) * | 2019-12-24 | 2021-07-01 | 江苏恒力化纤股份有限公司 | One-step cdp/pet two-component composite filament and preparation method therefor |
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| Publication number | Publication date |
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| CN111101235B (en) | 2023-01-31 |
| WO2021128750A1 (en) | 2021-07-01 |
| KR102482996B1 (en) | 2022-12-29 |
| KR20220021477A (en) | 2022-02-22 |
| JP7255029B2 (en) | 2023-04-10 |
| JP2022550637A (en) | 2022-12-02 |
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