JPS6285072A - Production of polyester cloth having silk spun like feeling - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention applies an alkali weight loss process after knitting or weaving. This invention relates to a method for producing a fabric suitable for clothing.

[Conventional technology] Conventionally, different polar polymers tm and tm that are incompatible with polyethylene terephthalate and polyethylene terephthalate have been used.
Selectively dissolves and removes one of the heavy components of the split type or sea-island type composite fiber, and gives full swell and drape properties to the fabric by a large number of ultra-fine filaments formed from the remaining segments, There are known methods for producing fabrics having a silk V3 feel.

However, this sophisticated polymer combination requires an alkali weight reduction process, which is widely used industrially to dissolve and remove polymer components that are incompatible with polyethylene terephthalate. Can't use special solvents such as formic acid, sulfuric acid (for nylon), carbon tetrachloride (for polystyrene), etc.? Special equipment to be used
Is it a disadvantage that it is not versatile and is economically disadvantageous?
It's a matter of government.

A method of combining two types of polyesters with different solubility in alkali has been proposed as a method to completely improve the disadvantage of overcasting. If the polyester is small, the segment t of the other polymer component, which should normally be left in the alkali weight loss process, will become thinner.For this reason, the polyester with the smaller solubility in alkali A method using polybutylene terephthalate kumquat as a polymer component has also been proposed, but polybutylene terephthalate ID?UM has excellent fiber performance such as stretch back injection as well as UM processed yarn, but When made into a filament, the Young's modulus is low, resulting in an undesirable texture.

[Problem that the invention seeks to solve]

The present invention aims to improve the drawbacks of the above-mentioned conventional method, namely, by combining 1lIi of polyester polymers of 1'; Cross section t4J" Composite f! Using fibers (-toni ↓9, after alkali weight loss processing, silk is given good υ, bulge and drapability! 1ψ of the fabric
The goal is to provide a method of creation.

[Means for Solving All Problems] The aim of the present invention is that the present invention is composed of two types of polynisder polymers that are soluble in alkali.
, Crossing + In is middle school? 3~8 legs extending from 7〃 in a redundant shape? Composite fibers with a multi-lobal cross-section, having easily alkali-soluble 71+ combined components [-AJ are arranged independently from each other so as to be exposed on the surface; Alkali-degradable polymer component (-B
J is placed in the middle part of the transverse m1 and the apex of each foot part Z), and the polynisdel composite clay fiber is knitted or refined to become a fabric. After that, it can be subjected to alkali weight reduction processing.An alkali-soluble polymer component [A]'fr: A polyester fabric with a unique texture that can be dissolved and removed. ! It is a construction method.

The entire history of the present invention will be explained in detail below.

In the present invention, the single fiber cross section is multilobal, and the foot segment includes a center segment of the cross section and the vertices of 3 to 8 legs extending radially from the center.
Raw polymer ke device and easily alkali soluble car unite all individual foot base parts? After the IW and M combined fibers are made or woven into a fabric, the fibers are subjected to an alkali weight reduction process, strained, and the easily decomposable polymer components are dissolved and removed in an alkali marsh. By doing so, the 3 to 8 lobe cross section is divided into 3 to 8 + 1 segment filaments, and the entire void space between the T11 filaments that maintains the swelling of the fabric is increased, giving it high drapability. Ultra-fine filaments give the entire fabric a unique silk-like texture.

In the present invention, the multi-lobed single fiber cross section of the multifilament fibers specifically refers to the shape illustrated in FIG. 1, but is of course not limited to this shape. Figure 2 shows the arrangement of the 21 types of polymer components in the unexploded multi-lobed composite fiber i'TJ+. The weight of the body component [A3 gold, 2 indicates the poorly alkali-soluble ■ [bone body component (, BJ gold).

[A), C842 types of polyester j1 (the bone component is a poorly alkali-soluble polymer component as shown in Figure 2) [
BJ is a substantial cross section of multilobal type・1.・Concavity formed by two adjacent legs (3 to 8 legs extending radially from the Vζ, middle lL, and The crystalline alkali-soluble polymer component is placed at the base of each foot, and the polymer component is located at the base of each foot. It is necessary to have a C which occupies a part between the middle part of the face and the apex of each foot part, and which is placed in the fiber surface VC. Separation into ultra-fine filaments consisting of segments of 11 to 11 (the body component LAI is not exposed on the fiber surface is a polymer component 113 processed by alkali darkening). I11 is fuuJ
Becomes Noh.

In the present invention, the number of legs of the multi-lobed cross section is at least three, and the more preferably there is, but in reality it is industrially extremely difficult to form a complete multi-lobed cross section with more than eight legs. .

A multi-lobed cross-sectional shape with all 3 to 8 legs is preferably the shape shown in Figure 1, and the shape of 19 legs and the easily alkali-soluble heavy component LAI and the difficult alkali component. It is necessary to completely balance the ratio of the bath-poured polymer fraction C1. Otherwise, the voids between the single fiber filaments will be too large, and the thickness of the fabric will be extremely reduced after the alkali thinning process is applied and the polymer component [AJ'] is removed, resulting in a poor texture. Because it takes a long time to dissolve and remove the easily alkali-soluble polymer component CA] by alkali reduction processing, .

Difficult alkali remaining due to alkali reduction process 1c') f
The filament fiber IW formed from ('j degradable polymer size, BJ segment) is not particularly limited, but is it similar to silk spinning? The first time to obtain t O denyl or less, especially α
It is preferably 6 denyl or less.

The fineness of the filament does not have to be uniform; it can be composed of filaments with different degrees of fineness. It may also be a type of mixed yarn.

In the present invention, the acid content of the polyester polymer of 2 citrons [AJ
, [f3), the difference in alkali solubility, that is, the difference in alkali weight loss rate, is preferably 5 times or more, particularly 10 times or more.

The multi-lobed cross-section composite fiber of the present invention can be obtained, for example, by the following process. In other words, a composite melt spinning device? Use, [A
), [BJ The polymer components of the two rods are placed in a multi-core sheath, and the tip is provided with a circular hole and a T-slit? It is guided through 3 to 8 radially arranged discharge holes and heated at 270 to 290°C.
8- Melt spinning.

The seventh figure shows a seven-delta diagram of a multi-1F core glass arrangement n according to the present invention. In the present invention, the melt viscosity difference between the two types of heavy bodies (I'A), CB, and J is as small as possible to obtain a better cross-sectional shape.The melt viscosity is controlled by f.
IAJ, LBJ Since the combination of the intrinsic viscosities of the two types of polymer components and the full speed spinning temperature can be easily carried out, there is no particular problem in industrial physiology. The diameter of the elliptical hole disposed at the tip of the slit in the discharge hole of the spinneret is preferably α15 to 05 mm, and the width of the 61t slit is preferably 1107 to 11 L25 mm.

The length of the slit can be arbitrarily selected according to the cross section of the time-melting spun yarn @6゜ After the spun yarn is cooled by cooling air directly on the yarn according to the conventional VC method. Added oil jl 1000-35007F
It is wound up as an undrawn yarn at a speed of +/min. This undrawn yarn was pulled, stretched and twisted using a 70 to 95°C heating roller between a drawing roller heated at 70 to 95°C, and a take-up roller.
Stretched at a stretching ratio of 0.70 to 185, and placed between the stretching roller and the take-up roller.
The alkali reduction process referred to in the present invention is industrially adopted. All known alkaline weight loss processing methods can be used, and the weight loss rate can be controlled, for example, by suspending the weight loss process by heating a 1 to 5% by weight aqueous solution of caustic soda to the fabric for 10 to 80 minutes under boiling conditions. fj: Just soak it.

The silk-spun fabric having wind-bleached fibers obtained in the present invention has two filament groups entirely threaded in a multi-lobed cross-section composite fiber for knitting or weaving, so that heat can be absorbed between the two filament groups. It is also possible to further improve the texture by making it a so-called different shrinkage mixed fiber yarn.
The bulkiness, ie, the swelling, of the fabric can be further emphasized by this differential shrinkage cross-wire effect. The variable shrinkage mixed fiber yarn of multi-lobed cross-section composite fibers in the present invention can be easily obtained as follows. That is, two multi-lobed cross-section composite fibers are supplied to an undrawn foundation drawing/twisting machine and heated to 70 to 95°C between a drawing roller and a take-off roller, at a maximum breaking draw ratio of n70 to α8.
Stretched at a stretching ratio in the range of 5, and at O, one filament group was made to run in contact with a hot plate heated to 150 to 230°C to form a low heat shrink component with a flood shrinkage rate of 2 to 8 inches, and the other filament group is separated from the hot plate ηλ via a suitable guide to form a high heat shrinkage fraction with a flood shrinkage rate of 10 to 25 inches, and then these two filament groups are combined on a take-up 90-ler.
After that, the winding n was put on the vane. It is preferable that the heat shrinkage rate difference between the two filament groups of the different shrinkage mixed yarn of the multi-lobed cross-section composite fiber obtained in this way is in the range of 5 to 15 cm in terms of flood yield rate, and the stationery shrinkage mixed yarn The overall flood contraction rate is 1
A range of 0 to 20 inches is preferred. Outside the above range
If the effect of the swelling of the fabric is small, or the wind of the fabric is
The joint becomes hard, which is not good.

Another method for completely improving the swelling of the fabric is to clean the multi-lobed cross-section composite fibers used for knitting or weaving in the present invention in the longitudinal direction of the fibers, and repeat high heat shrinkage areas and low heat shrinkage areas at short intervals. It is also possible to make a latent micro-crimped yarn consisting of % fiber filaments. This latent micro-crimped yarn is fully drawn as an undrawn multifilament, and after this multifilament IC fiber is fully entangled, the focused multifilament Togane is heated for a short time on a heating body under a tension lower than the heat shrinkage stress of the fiber. It can be obtained by running the multifilament bundle in contact and subjecting the multifilament bundle to an unrestricted heat treatment.

This latent micro-crimped yarn of multi-lobed cross-section composite fiber can be obtained by the following process. That is, one multi-leaf cross-sectional plate @ undrawn yarn of fiber is fed to a drawing twister, and 70 to 9
The film is stretched between a stretching roller heated to 5° C. and a first take-up roller at a stretching ratio in the range of α70 to α85, which is the maximum stretching ratio at break. It is preferable that the drawn yarn has a relatively high trapezoid collection rate of 15 to 55 inches. Between the first take-up roller and the second take-up roller, the drawn yarn is first subjected to fiber entanglement treatment by an interlacing device. Execution o
Then, the threads 22'y, which were converged by the linkage, continued.
150-2501? .

The material is heated to 100% and run on a hot skin plate for a short period of time to perform non-uniform heat treatment, and then wound onto a burner. Here, the relaxation rate between the first take-up roller and the second take-up roller is important. is preferable, and if the tension is high, the air inherent in the spread portion of the bundled yarns will be pushed out and the effect of the non-uniform heat treatment resulting in uneven heating will be reduced.

19. If the running tension is extremely low, loops and sagging will occur, which is undesirable. Therefore, in order to obtain a high running tension with a low heat shrinkage stress of the drawn yarn, which causes loops and walnuts, an appropriate relaxation rate can be selected. As the fiber entangling device, a standard interlacing device can be used, and the fiber entangling degree is preferably such that the number of repetitions of opening portions and knot portions is 9,100 or more per meter. It is preferable that the flood shrinkage rate of the multi-lobed cross-sectional compound fJi obtained as described above and the latent micro-crimped yarn of the fiber is in the range of 10 to 2 degrees in terms of the combing of the fabric. a In the present invention, the poorly alkali-digestible polymer component [B) must be polyethylene terephthalate in which at least 95 moles or more of ethylene f L/7 tally units are formed. If it is less than 95 mulch, the strength of the complex fibers becomes weak due to the opaque content. To maintain the strength of multi-threat and delicate properties, the hardness and viscosity of μ-weighted body component [B] was adjusted to α65~[1
The range V of 75 and f'L is a light component.

As an example of the easily alkali-soluble polymer component CAJ, which has a significantly higher alkali loss rate than the polymer component LBJ,
A modified polyester that can be dispersed in hot water is used. Uchi, 5-sodium sulpoinphthalate as a dicarboxylic acid component? 10 mole or more, and the diol component is selected from diethylene glycol, triethylene glycol, tetraethylene glycol, 1,4-cyclohexane dimetatool, 1,6-hexane diol, etc.
Diol industry with 1 or more 20 moles or more
Examples include synthetic polyester.

Non-grade modified polyesters which are effective as this hot water dispersible polymer component contain hydrophobic residues and hydrophilic residues. That is, in a composition consisting of isophthalic acid, 5-sodium sulfoisophthalic acid, and diethylene glycol, isophthalic acid is hydrophobic, 5-sodium sulfoisophthalic acid is hydrophilic, and diethylene glycol is hydrophilic. It is.

In the present invention, the modified polyester hepta-alkaline IJ with hot water dispersibility is used for melt spinning as one of the easily alkali-soluble polymer components of the composite fiber, which has an extremely high weight rate. The next performance that was not in question is required.

That is, (1) After the polymerization reaction, it is possible to take out the polymer as a granular solid called a molten polymer catalyst chip or pellet. There isn't.

(3) It can be dried in a dryer commonly used in the industrial manufacturing method of polyester fibers.

(4) C that adheres to the screw surface of a screw type extruder and does not spin idle together with the screw shaft (5) Threadability.

etc.

X)” E-Dicarboxylic hydrothermal dispersible polymer component 1
! 2g portion is 70-900-90 molar talic acid and 30-900 molar
10 molar portions of 5-sodium sulfoisophthalic acid are required. If the isophthalic acid content is less than 70 molti, the spinnability and fiber performance of the polymer will be poor, which is not preferable. For 5-sodium sulfoisophthalic acid to exhibit hot water dispersibility, 10 mol or more is required, but 50
If the molar value exceeds S', the polymer will be significantly colored and the bath melt viscosity during melt spinning will be too high, resulting in loss of spinnability, which is not preferred.

It is necessary that the diol component of the hot water dispersible polymer component contains 20 moles or more of diethylene glycol. If it is less than 20 molar, it is not preferable because it becomes dispersible in hot water or becomes opaque. Of course, it is possible to use 100 mol of diethylene glycol, but since glycols have poor weather resistance, they are copolymerized with ff1J, tba1,4-cyclohexane dimetatool, etc. to a composition ratio of 30 to 700 to 70.
It is preferable that tvfVc has a molar ratio.

Specific examples of the hot water dispersible weighted body component include modified polyester gold as shown below.

Modified polyester (1).

Dicarboxylic acid diisophthalic acid (80 molti) 5-sodium sulfoisophthalic acid (30 molti) Diol: 1,4-cyclohexane dimetatool (
70 molti) Diethylene glycol (30 molti) 1,■,20.32 Modified polyester (2) Dicarboxylic acid: Isophthalic acid (90 molti) 5-sodium sulfoisophthalic acid (10 mol%) Diol: 1,4-cyclohexanedi Metatool (
50 mol%) Diethylene glycol (50 mol%) King, ■: α48 Here, I, V, (intrinsic viscosity) are phenol/
Tetrachloroethane = 60/40 (LJ6) ;F
It has a viscosity of 9 when measured at 25°C using a modified polyester having a bath medium of 100-9α259.

Modified polyester (1) can be easily obtained industrially as follows.

Dimethyl inphthalate 155.2f (α80 mol),
Dimethyl 5-sodium sulfoiphthalate 59.22
(α20 mol), 1,4-cyclohexane dimetatool 107.82 (α7o mol), diethylene glycol 5
1.8 f (α50 mol) and 21 mol of titanium isopropoxide were added to the bath solution [18 mj].
And heated to 200℃ and 13mH? Make a vacuum. Next, heating and stirring were continued for 1 hour under these conditions, and then cooled. As catalysts, known examples such as Ff, antimony oxide, ## lead, manganese acetate, cobalt acetate, zinc succinate, and aluminum were used. Zinc acid, magnesium methoxide, sodium methoxide, barium oxide, cadmium formate, etc. can also be used.

Pressure other than atmospheric pressure? When used, the reaction temperature for the first stage esterification ranges from 120 to 300°C. Second
The reaction temperature of the reaction step, that is, the polymerization step, is 200 to 510℃.
It is ℃. The reaction pressure is 1111-20I1111IH, but it is preferable to carry out the reaction under a pressure of Q,j-5 mH for several heavy θ steps.

By the way, hot water dispersibility refers to the solubility of gold in hot water at a temperature in the range of 60 to 130°C. Is it possible to reduce alkali weight in a very short time by adding all of the alkali below 5-IS, for example, caustic soda, and performing alkali weight loss treatment with a nine-hot water bath? Although this can be done efficiently, it is of course also possible to perform the weight reduction process using hot water over time.

Composite fibers useful for the VC of the present invention are [A), LB) 2
It is preferable to perform composite melt spinning on the citrus polymer component at a temperature of 270 to 290°C. In the present invention, C1, L)l
The number of polymer components of the IZ Keyaki type (TW) when performing composite melt spinning with a core-sheath arrangement is important as described above, and it is preferable to keep them approximately equal.

[A), (-B] The melt viscosity of the two types of polymer components can be controlled by the intrinsic viscosity, and this intrinsic viscosity is determined by the torque of the stirrer in the combination polymerization reaction of the respective polymers. Jv can easily be used to terminate the reaction when a certain predetermined value is reached.(A)
CB] 2nd type (the ratio of body components is [AJ: [
B] = 50: The range of 50 to 5:95 is possible, but so: 70 to IQ: 95 is most preferable. This will be explained more specifically.

Example 1 The slightly alkali-soluble polymer component CB) has an intrinsic viscosity of α65, consisting essentially of ethylene terephthalate units.
Used on polyethylene terephthalate, easily alkali fg
'M polymer component LAI and RAE, dicarboxylic acid component 5
- Contains 23 moles of sodium sulfoisophthalate and 5 moles of adipine as a copolymer component, with an intrinsic viscosity of 1
157 modified polyester was used, composite melt-spun was carried out at 280°C from a discharge hole having four slits in a multi-core-sheath arrangement with the same window in a composite melt-spinning device, and after cooling and applying an oil agent in accordance with a conventional method, 1aOOm/ An undrawn yarn of a four-lobed cross-section composite fiber having a monofilament cross-section of 197 denier/30 filaments and having four legs was obtained by winding the yarn in minutes. Furthermore, [AJ,
[B] The ratio of polymer components in two buildings is 20 by weight
: Measure with a gear pump so that it is 80, and then [AJ.

[B] The melt viscosity of the two polymer components at the time of discharge is [A]
The intrinsic viscosity of the polymer component LLI and the overall spinning temperature were such that

Example 2 The polymer component in Example 1 [the above-mentioned hot water dispersible modified polyester (1) as AJ] was used in Example 1, except that kumquat was used as AJ.
197 of the cross section of the single fiber that forms the four legs in the same way as
An undrawn yarn of a four-lobed conjugate fiber having a denier of 150 filaments was obtained. [A.J.

[B] The ratio of heavy 9-body components in two buildings is 20:80 by weight.
Weigh it with a gear pump so that it becomes 't7cLA).

[:B] The bath melt viscosity at the time of discharge of the class 2a polymer component is [/
）Kishi B] Don't make a heavy @salary component ^, ]'s hardness.
The viscosity as well as the spinning temperature were selected.

Example 6 The undrawn yarn obtained in Examples 1 and 2 was stretched 2.66 times V between a drawing roller heated to 85° C. and a take-up roller using the drawing device shown in FIG. Roller and take-up 9
The fibers were heat treated on a hot plate at 155 DEG C. and wound at 6 QOm/min.

Table 1 Example 4 Actual h((r) A four-lobed cross-sectional image obtained in Example 6 A/radial drawn multifilament was used for the weft, and a commercially available triangular (△
) Using polyethylene terephthalate H'4 with a cross section of 50 denier/36 filaments, weaving to a 1/2 twill standard with a density of 95 wefts/11-J and 70 warps/3 warps, weft 5%, Preheat cera 1-f was performed at 160°C for 1 minute at a glue laxity rate of 5%, followed by 7 scouring steps.
This fabric after Shitataru? It was subjected to an alkali weight loss process with an alkali weight loss rate of 40 ili by placing it in a 100°C (boil) bath containing 3i-i% caustic soda and a water bath solution for 50 minutes.

When the weft threads of the fabric were removed after the alkali H1 reduction process and observed under a microscope, the easily alkali-soluble polymer component LA was found to be difficult to remove in the alkali IJ bath.
A large number of ultrafine segments consisting only of BI segments were observed. n7t0 Example 5 The fabric obtained in Example 4 was dyed under the same conditions and then sawbiged, followed by after-heat setting syllables at 150° C. for 1 minute.

The obtained fabric exhibited uniform dyeability and an excellent silk-spun texture rich in VC. Dye: Dianic Sprue BG-PG (Mitsubishi Co., Ltd.) (manufactured by Kasei Kogyo Co., Ltd.) Dye a degree: 1% owf Dispersant: Disbar T L [15cc/L Ultra N2 α5cc/L Bath ratio: 1:100 Temperature = 130°C Time: 60 minutes Example 6 Obtained in implementation flJ1 Two undrawn yarns with a four-lobed cross-section compound fiber were fed to a drawing device and drawn 266 times V between a drawing roller heated to 85°C and a take-up roller, and one group of filaments was heated to 185°C. The filaments were run in contact with a hot plate and heat treated, and the other filament group was separated from the hot plate via a guide bar so that it would not be subjected to heat treatment7, and then the two filament groups were taken up on an a-saw. - single thread,
I crossed the Burn VC at 600m/min. What is the quality of the obtained different shrinkage mixed fiber yarn? Shown in Representative 2.

Table 2 The weft density of this differentially shrinkable mixed fiber yarn was set to 48 threads/inch, and the relaxation rate in preheat setting was 10.
Sand making, scouring, and alkali weight reduction processing were carried out in the same manner as in Example 4 except that the diameter was 5 inches, and then dyeing, sawing, and after-heat setting were carried out in the same manner as in Example 5. The resulting fabric had the same bulge as above, and had a silk-spun texture of 71 combs.Example 7 +! The undrawn yarn of the heavy conjugate fiber obtained in 111,2 was fed to a drawing device, stretched to 2.66 times between a heating roller and a first take-off roller at 85°C, and then passed through the first take-off. 2 Kg7 using an interlacing device under 5% relaxation conditions between the roller and the second take-off V-saw.
cm” G compressed air V trowel The opening part and knot part are repeated 14 times.
The fibers were entangled to a temperature of 0 fibers/m, and then heated continuously to 185°C and then run in contact at 1,600 m/min on a hot plate with a length of 50 crn to give an unrestricted heat treatment. I wound it up on a strainer. The fiber quality of the obtained latent micro-wound silk thread is shown in Table 3 below.

Weaving, scouring, and alkali reduction processing were performed in accordance with Example 4, except that the latent micro-crimped yarn t-breheat set had a relaxation rate of 10% in all wefts and a warp of 5 inches, and then Example 5.
As well as dyeing, soaping, and after-heat setting the gold stone became.

The resulting fabric had the same bulge as above and exhibited an extremely excellent silk-spun texture.Effects of the Invention As described above, the present invention has produced an ultrafine filament suitable for clothing applications. It is possible to provide a fabric with a silk-spun texture with a good texture, which is extremely effective in diversifying products and increasing added value.

If f7 is incorporated into the present invention, the feel of the fabric can be further improved, and the fabric can be manufactured stably throughout the industry.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an example of the multi-lobed composite fiber used in the present invention, and FIG. 2 is a cross-sectional view of an example of the multi-lobed composite fiber used in the present invention. CBJ layout diagram, Figure 3 is multi-lobed α
FIG. 3 is a layout diagram of two unfavorable glaze polymer components [A] and [4U] in the cross-sectional plane VC of the platform area.

Claims (1)

[Scope of Claims] A composite fiber with a multilobed cross section, which is composed of two types of polyester polymers having different solubility in alkali, and whose cross section has 3 to 8 legs extending radially from the center. , the easily alkali-soluble polymer ash [A] occupies the root portion of each foot, and is arranged independently from each other so as to be exposed on the fiber surface, and the poorly alkali-soluble polymer component [A]
After knitting or weaving into a fabric using polyester composite fibers arranged so that B] occupies the center of the cross section and the apex of each foot, it can be easily alkali-dissolved by knitting or weaving it into a fabric. 1. A method for producing a polyester fabric having a silk-spun feel, which comprises dissolving and removing a polyester component [A].