TW567255B - Improved drawing of polyester filaments - Google Patents

Abstract

Simultaneous drawing of mixed polyester filaments is improved by use of chain-branched polyester for the polymer from which the polyester filaments are spun.

Description

567255 Α7 V. Description of the invention (1) Field of the invention The present invention relates to improved drawing of polyester yarns, and more specifically, to a method of drawing polyester yarns mixed in the same bundle, especially drawing this A method for mixing filament tows, and the obtained drawn filaments and tows, as well as downstream processing methods and products thereof. BACKGROUND OF THE INVENTION Polyvinyl acetate has been commercially manufactured on a large scale for processing into shaped articles such as fibers, and is mainly made of poly (ethylene terephthalate). Synthetic polyester yarns have been around for decades and have been commercially used. They were first proposed by Carlos (wH Carothers in US Patent No. 2,071,251, then Whinfield and Dickson in US Patent 2,465). Poly (ethylene terephthalate) was proposed in No. 319. Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page) Although there are many polyester polymers (including copolymers) (Ester) has been proposed, but by far the most widely manufactured and used polyester for textile fibers has been poly (ethylene terephthalate), which is often referred to as homopolymer PET. Homopolymer pET is more costly than Low due to its sufficient properties, it is generally better or even better than copolymers for most end uses. However, homopolymers are known to require special dyeing conditions such as those required by Nylon (requires superatmospheric pressure) High temperature), so copolyester has been proposed and has been used commercially for some applications. Homopolymer PET is often referred to as 2G-T, and poly (trimethylene terephthalate) is referred to as 3g · T (though some people began to call this PTT), and (Tetramethylene terephthalate) is called 4G-T, and so on. Although there is some interest in 3G-T and 4G-T, the most used polyester polymer is still 2G-T, so it will be It will be discussed more below, but it should be understood that the present invention is also expected to be applicable to other polyesters, such as other -4- This paper size is applicable to the Chinese National Standard (CNS) Α4 specification (210 × 297 mm) employees of the Central Bureau of Standards of the Ministry of Economic Affairs Printed by the Consumer Cooperative 567255 A7 ______B7 V. Description of Invention (2)

CyCU works on Qin Yixian esters, such as 3-oxobutylene and 4-oxobutylene; and copolyesters. Polyester yarn is either (1) continuous filament or discontinuous fiber. The latter is often called short fiber or cut fiber, and it is first extruded to form continuous polyester yarn, and then processed in the form of tow of continuous polyester yarn. Processed and made into short fibers. An important stage in the processing of these continuous polyester yarns is "drawing," which improves the orientation of long-chain polyester molecules, thereby improving the properties of the filaments. Most synthetic fiber manufacturers' goals are to replicate natural fibers, the most common It is the beneficial properties of cotton and wool fibers. Most polyester segment fibers have always been circular in cross section and mixed with cotton. However, recently, US patents 5,591,523 (Dp_6255) and 5,626,961 (DP-6365- A) and co-applications 〇8 / 662 800 (Dp_64〇〇) (application on June 12, 1996, has been approved), corresponding to WO97 / 02372, WO 97/02373 and WO 97/02374 (the contents of which are incorporated herein by reference) has been disclosed as suitable for processing slivers on carding or combing systems and downstream processing in these systems, and finally into polyester yarns for cloth and clothing The invention of the bundle. The present invention was obtained in the course of this work, so it will be explained with particular reference to the value of drawing polyester filaments with tows for further processing in these systems, but it is not limited to drawing these yarns. Bundles, and Xianxin is stretching other polyester tows It has the potential to be more widely used. For example, U.S. Patent No. 5,591,523 (Dp_6255) has revealed that sometimes filaments with different monofilament fineness (dpf) are required, so the patent shows surprisingly in Example 1 that it can Rotary spinning has unstretched polyacetate yarn spun with significantly different fineness on the same spinning machine without adjusting the natural draw ratio, and then draw in the same, 3 «pack-(Please read the precautions on the back before filling this page )

、 1T -5- 567255 ΚΊ Β7 V. Description of the invention (3 at the same time draw an intimate mixture of these spin-spun filaments in the same tow to provide filaments with excellent properties, the properties of which are different due to different dpfs Different (column 6, lines 15-29). The present invention expands on this amazing discovery and extends to simultaneous drawing of hybrid filament bundles beyond the hybrid filament bundles explicitly disclosed in the patent. SUMMARY OF THE INVENTION According to one aspect of the present invention, the present invention provides a method for drawing a polyester yarn mixture in the same polyester tow, wherein the mixture is a mixture of different cross sections and / or different monofilament deniers, and wherein the polymer The esters are branched with about 0.01 to about 0.8 mole% of the chain branching agent chain; these mole% are traditionally calculated as the molecular weight of the chain branching agent unit divided by the molecular weight of the polymer repeating unit multiplied by 100; By way of example, the repeating unit of 2G-T is ethylene terephthalate. According to another aspect of the present invention, the supplier is a mixture of polyester yarns, wherein the mixtures have different profiles and / or Mixture of different monofilament deniers, where The polyester is branched with about 0.1 to about 0.8 mole% of a chain branching agent, and the shrinkage thereof is about 0.5 to about 3%. These mixtures may be continuous associative drawn tows And / or the form of the drawn yarn, and its produced poly @ 旨 丝 混 人 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page), including various forms of The downstream products of the mixture of short (cut) fibers, including yarns and cloths and clothing and the yarn itself, and it should be noted that polyester yarn mixtures can also be combined with other fibers, such as other synthetic polymers: Including _ (various kinds of resistance) and polyassociated fibers and / or: and wool blend. Shao " fibril " and "fiber," the two terms are used in the present invention to include each other, and-general-6-this Paper size is applicable to Chinese National Standard (CNS) Public f 567255 Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs A7 ______B7 V. Description of the invention (5) As shown, the gist of the present invention is to use a chain-branched polyester polymer Polyester filaments are made and stretched according to the method of the present invention to provide the present invention. Bright filament mixture. Use of chain branching agents (ie, polyfunctional polyester intermediates with more than two functional groups necessary for polymerization, such as ethylene glycol and dibasic acids, both of which are difunctional) It has been disclosed in the art, such as MacLean et al. (U.S. Pat. No. 4,092,299, 4,1,13,704, Mead et al.) U.S. Pat. No. 3,335,21, Oxford et al. (Oxford et al.) W0 92/13, 120, Duncan, US SIR H1275, DuPont (Broaddus et al.) EPA 294,912, Reese US Patent Nos. 4,833,032, 4,966,740 and 5,034,174 No., Goodley et al. US Patent No. 4,945,151, and the techniques referred to and cited therein, such as Vaginay US Patent No. 3,576,773. Some of these references use different terms, such as viscosity builders, because such substances are added to improve spin spinning performance, or for other reasons. Many of these previous techniques are related to high-speed spinning of continuous filament yarns as feed yarns for stretch deformation, so these filaments are spin-oriented, rather than amorphous, such as more suitable for drawing in tow Processing into cut fibers is particularly interesting and particularly advantageous in accordance with the present invention. The low shrinkage rate of the filament mixture of the present invention makes our stretched filaments very different from the higher shrinkage produced by high-speed spin spinning that manufactures spin-oriented filaments for use as stretch-deformed feed yarn (commonly referred to as POY). Rate fibrils. The shrinkage is Knox (Knox) U.S. Patent No. 4,156,071 No. 6 Bottom Shao refers to the boiling shrinkage shrinkage and is measured in the manner described in #X. As shown, U.S. Patent No. 5,591,523 and WO 97 / 〇2372 have already revealed the simultaneous drawing of mixed dpfs polyester tow in Example 1 and it is amazing -8-This paper size applies Chinese National Standard (CNS) M Regulation ho 、 〆297 公 楚） (Please read the precautions on the back before filling this page).

， 1T printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 567255 ΑΊ ------------ Β7 V. Description of the Invention (6) ~ Yes, this can be achieved without the disadvantages of deep dyeing Stretch filaments. This method and the resulting mixed dpf drawn filaments, all of which have elliptical cross sections, have been disclosed therein. In addition, U.S. Patent No. 5,629,961 and WO97 / 〇2373 have disclosed filaments with an elliptical cross-section of an improved fan with 6 grooves, as in WO97 / 〇2374 and approved US application 08 / 662,8. 〇 Generally incorporated in the disclosure of US Patent No. 5,591,523. As a result, this application relates specifically to additional aspects of the inventive concept that have not been covered in these prior patents and patent applications. These additional aspects are now mentioned: incomplete fan-shaped oval sections, such as one section that is circular and the other section non-circular, for example, bilobal, band-shaped, or even different sections of fan-shaped ovals A mixture of filaments; a mixture of non-circular cross-sections and above, any mixture of such non-circular cross-sections; solid filaments and filaments with one or more longitudinal pores (a pore is often referred to as a hollow filament, However, there are also mixtures having porous fibers such as 3 or 4 pores or 7 pores, such as U.S. Patent Nos. 3,745,061, 3,772,137, and 5,104,725, as well as the techniques referred to and cited therein; In terms of these terms, such filaments with longitudinal pores are also technically included in the concept of "non-circular" filaments, because in the stretching (2G-T homopolymerization by unchained branching agent) When the product is made), the previous behavior is completely different from the behavior of round (solid) fibers (also made by the same chainless branching agent); Also, different dpfs filaments, even with the same cross section (not all of the above are fan ellipse) Profile), and different profiles Different mixtures thereof; such differences may be so large that at least i ix of low dpf, or larger differences, such as at least 1 · 2χ, 1 · 3χ or Ge 1 · 5χ or more dpf. The following examples will show that the filament mixture obtained according to the present invention (please read the precautions on the back before filling out this page) 衣 · -9-

567255 Printed by the Consumers' Cooperative of the Central Bureau of Standards and Assistance of the Ministry of Economic Affairs A7 B7 V. Description of the invention (7) The dpfs and properties of stretched filaments are difficult to predict. The present invention will be further described in the following examples. For the sake of convenience, they are all based on the above processing on the combing system. All parts and percentages are by weight unless otherwise noted. In all cases, the boiling shrinkage of the product is in the range of 1% to 1.5%. Most of the test procedures are well known and explained in the art. To avoid doubt, the procedures used are explained in the following paragraphs. The Pencelon-average stress-strain curve was obtained as follows and is the average of 10 individual filaments of each fiber obtained from the tow. Using a magnifying glass (LUXO Illuminated Magnifying Glass), 10 samples of each filament were separated from the tow. The monofilament fineness (DPF) of each sample filament was measured with VIBROSCOPE (HP 201C audio oscillator). Place the sample filaments one at a time on Eastland (type 1122 or 1123) and measure the stress-strain behavior. Remember the 10 fractures of each filament in Green, and the average of 10 samples of each filament in Green, so it will be easy to understand that the number read by the stress-strain curve of individual filaments is not necessarily Related to the nature of expansion calculated and listed on average in the table. JLi-Measured using conventional U.S. textile units, including and which are metric units. In order to comply with the requirements of various places, the dtex and CPcm equivalents of the DPF and CPI measurements are listed in parentheses after the actual measurements. However, in terms of tensile measurement 値 (initial modulus is MOD and toughness is TEN), the actual measurement 値 unit gpd has been converted to g / dtex, these latter are listed in the table, and the stress-strain curve in the figure Then the original metric sheet strain 値 is displayed on the Y-axis. 1Frequency (Crimp FrequencvH is measured as the number of crimps per tow (CPI) after tow crimping. The crimp is represented by countless peaks in the fiber and analysis. Since the silk-10- This paper size applies to Chinese National Standard (CNS) Α4 Specifications (210X297 male f) (Please read the precautions on the back before filling this page)

， 1T 567255 A7 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs. 5. Description of the invention (8 beams are taken out of consideration. 〇 tender secret long-term production test 詈 # i ,,,, fixed in a loose state (one at a time) in the fiber π, in the tongs. The tongs are manually operated. At the beginning, the two are used to prevent the fiber from being stretched when it is placed in the tongs. The fiber end is placed in the left side and the other side is placed in the side. ϋ 11 ； & H #Rotate the clamp on the left to remove any rush in the fiber. Slowly move the bracket on the right and gently move it to the right (extend the fiber) until all is loose. Use the illuminated magnifying glass to count the number of peaks on the top and bottom of the fiber. Then slowly and gently move the right clamp bracket to the right until all the curls have just disappeared. Be careful not to stretch the fiber. Record the length of this fiber. The crimping frequency of each fiber is calculated as follows: _ _ Total number of peaks 2 X filament length (uncurled) Record the green average of 10 CPI (crimp per inch) of all 10 fibers. The metric equivalent is CPcm GIU (Crij ^ Take Ud, Vol. Absorption) is also measured in tows and is a measure of the length of the tow extending to remove crimps divided by the unstretched length (ie, when initially uncurled), expressed as a percentage, as in the United States by Anderson et al. (Anderson et al.) It is described in Patent No. 5,219,582. The number of non-circular fiber profiles is obtained using the following procedure. A fiber sample is placed on a Hardy Microtome (Hardy, USDA 378, 1933), and According to basically "Fiber Microscopy, Its Technique and Applications1" (Fiber Microscopy and its technology and applications · (]. L. Sloves, Van Nostrand Co., Inc., New York 1958, No. -11-this Paper size applies Chinese National Standard (CNS) Λ4 specification (210X297), (please read the notes on the back before filling this page), 11 567255 Μ 7 Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 180-182) sections. Then place the slice on a Super FIBERQUANT Video Microscope System Table (Vashaw Scientific, 3597 Parkway Lane, Suite 100, Norcross, Georgia 30092) and zoom in as needed Shown on Super FIBERQUANT CRT. Select one image of each fiber and measure the critical fiber size. Then calculate the ratio. This process is repeated for each filament in the field of view to produce a statistically significant set of samples And list the average 値. The aspect ratio or modification ratio of the non-circular section is listed in the parentheses after the section type indication in the table. For example, nS0 (1 · 37) π represents an elliptical section of a fan with an aspect ratio of 1.37. Similarly, the pore content is listed in parentheses after the hollow section is marked. For example, if the pore content is 7%, it is displayed as `` hollow (7%) '', which is based on Anaji et al. (Aneja et al.) In the United States. Patent No. 5,532,060 measures the relative viscosity (LRV) of a polymer dissolved in a HEIP solvent (hexafluoroisopropanol) containing 100 ppm 98% reagent grade sulfuric acid. The viscosity measuring device is a capillary viscometer available from many commercial vendors (Design Scientific, Cannon, etc.). Relative viscosity units are measured in units of 4.75% by weight of the polymer in a solvent at 25 ° C. Sulfuric acid used to measure LRV can break crosslinks, especially silicon (in the case of tetraethyl orthosilicate chain branching agents). Acid Free Relative Viscosity (NRV) is the dryness of the polymer as well, measured and compared to the hexafluoroisopropanol solvent without any sulfuric acid. Due to the absence of acid, cross-linking remains intact when measuring NRV. Delta RV (ARV) is the notation we use here to define the difference between the above measured NRV and LRV, and indicates the amount of cross-linking that is destroyed by the acid when measuring LRV. -12-(Please read the notes on the back first. • I install 丨 -rrFill in this page

、 1T This paper size applies Chinese National Standard (CNS) A4 specification (210X 297mm) 567255 Μ __ Β7 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (10) Disadvantages are classified into three categories: 1 ) Quite weaving defects (EFD), 2) Deep dyeing defects (DDD), 3) Bonding (SPL) The first two faults (EFD and DDD) are fibers and fiber maps that are deeper than normal fibers. The diameter of DDD is less than Normal (stretched) fiber diameter 4 X. EFDs diameter is 4 X or more normal fiber diameter. Both disadvantages must be longer than 0.25 inches (6.35 mm). Samples are processed by roller top carding machine. The sliver is dyed light blue and visually inspected under a lighting magnifying glass. The fibers dyed deeper than the entire sample are removed, classified into EFDs and DDDs, and counted. Each disadvantage is measured per 0.1 pound (0.045 kg) of yarn. The number of shortcomings of the bar is indicated. The bond is an oversized fiber and fiber map. In order to be classified as a bond, this disadvantage must also be longer than 0.25 inches, but the total diameter must be greater than 0.0025 (0.0635 mm). Bond In the short fiber through the cover Carding machine processing is concentrated in the cover flower waste. The cover flower waste is visually inspected against a black background. The adhesion is removed, classified by size, counted, and expressed on the basis of sample weight. Example 1 Melt-spun mixed filaments of ethylene terephthalate polymer at 282 ° C. These mixed filaments are light filaments (fine fineness) with oval cross section (so) and heavy fibers with circular cross section. A mixture of filaments (thickness). Through different capillaries of the same spinneret, each spinneret contains 1,000 capillaries and contains 0.24% (0.22 mole%) tetraethyl succinate (TES , Basically as described in US Patent No. 3,335,21 of Virtue et al. And with 10.2 LRV and 15.3 -13- (Please read the precautions on the back before filling this page) ,! This paper size applies Chinese national standards ( CNS) Α4 regulations (210X29? Male f) 567255 A7 B7 V. Description of the invention (11) NRV (therefore 5.1ARV) polymer, at the total speed of each spinneret ^ with 丨 ^ / hour (10.75 Kg / hour ) Dissolve different filaments at the same time, and wind it on the bobbin at 18000ypni (1650 m / min). 5 16 circular capillaries, each with a flow area of 0.0003079 square inches (0.199 square millimeters) to manufacture heavy filaments (circular cross-sections) and 484 non-circular capillaries, each with a flow area of 0.0002224 square inches ( 〇 ″ 43 mm 2) to make light filaments (elliptical cross-section). Smaller non-circular, capillary tubes are located on the inner 5 (9 in) rings, while larger circular capillaries are located on the spray 4 loops beyond the silk head. The shape of the pores of the fan-shaped oval capillary is basically as described in the aforementioned U.S. Application 08 / 662,804 (DP-6400) and WO 97/02374. Radially ejected air is used to cool molten filament streams from a profiled quenching system, as described in Anderson et al., U.S. Patent No. 5,219,582. The obtained spin-spun tow is composed of a mixture of different cross sections and low and high-density filaments, and its properties are shown in Table 1A. The single-filament stress-strain curve of two different filaments is shown in Figure 2. The continuous curve is a low-density (light) filament with a fan-shaped (S〇) section, and the interruption curve is high-density. (Heavy) round filaments.

Table 1 A (Read the precautions on the reverse side before filling out this page), 11 Printed filament types and shapes DPF Mod Ten Light SO (1.37) 1.6 (1.8) 12.2 0 · 7 Shape 2.7 (3.0) 13.8 0.7

Mixing the first spinning mixed filaments of 6 or 8 bobbins to form a mixture with a nominal name -14- This paper size applies to China National Standard (CNS) A4 specification (210X29 * 7 mm) Industrial and Consumer Cooperatives Seal 11. Description of the invention (than 40% scallop oval, low dpf, and 60% round, high dpf tow. This tow is stretched with a twist ratio of 2 · 2 2 X and used 9 on one side Sprinkle with a water nozzle at 5 ° C. Then, pass the tow through the stuffing box curling machine, and then relax at τ ^ I at 14 5 ° C to obtain a final tow size of about 74,800 deniers (83,100 (^ \ ), Which is an intimate mixture of curled filaments (10.6 CPI, 4.2 CPcm) of two types of filaments, whose properties are shown in Table 1B.

Table 1 B-shape blends DPF Mod Ten Eb ° / 〇 Light dpf SO (1.24) 40 0.98 (1.1) 28.7 1.1 9 Heavy dpf round 60 1.19 (1.3) 32.0 1.7 12 Apply traditional finishing to provide finishing level (to Fiber) shall be 015%. The nominal monofilament fineness (that is, the fineness of the total tow divided by the number of filaments) is i 3 dpf (1.3 dtex). About 40% of the filaments are fan-shaped (0.98 denier), and the remaining 60% are Round (1.19 denier). Process the product, and then check the product defects DFD, DDD & spL, all of which show zero defects, so it is clear that the product quality is not adversely affected by the simultaneous drawing of a mixture of primary spinning filaments of different shapes and deniers. The point is surprising and contrary to previous experience attempting to process filaments of mixed shapes and deniers (made essentially the same from unchained branching homopolymers), which will be described below. Comparatively speaking, in contrast, when the four mixtures of different filaments of the homopolymer 2G_T without any chain branching agent are stretched with the same tow, when the processing and inspection institute -15- This paper size applies to China Standard (CNS) A4 specification (210X 297 mm) 567255 A7 ___ B7 V. Description of the invention (13) ^ When drawing the tow, there are obvious product defects. As shown in Table C 2, the draw ratio is `` DR '' Is shown in Table C 2. Each mixture drawn together is a mixture of two types of filaments in four types of CA, CB, CC and CD. The properties of the four types are shown in Table C1. The filaments were spun from a homopolymer 2G-T without any chain branching agent (LRV 20.4). The rest are basically as described in Example i. Table C 1 Item shape DPF Mod Ten Eb% NDR CA SO (1.7) 3.1 (3.4) 15.4 1.8 199 1.9 CB SO (1.7) 10.4 (11.5) 17.6 1.6 278 1.7 CC Round 7.4 (8.2) 16.6 1.6 245 1.9 CD SO (1.7) 7.4 (8.3) 17.3 1.7 231 1.9 Table C2 Mixture DR EFD DDD CA / CB 2.4X 148 57 CA / CB 2.8X 108 54 CC / CD 2.7X 0 45 CC / CD 3.0X 0 27 Stretching the filaments of this homopolymer mixture (CA / CB is a fiber of different deniers A mixture of silk, but both are scallop elliptical sections with a modification ratio of 1.7, while CC / CD is a mixture of filaments of the same fineness, but one of them is round-16-This paper size applies to Chinese National Standards (CNS) Λ4 specifications (210X297 male feet) f Please read the precautions on the back before filling this page)

-、 1T printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 567255 A7 ------------ ^ V. Description of the invention (14) ^ shape, the other is produced by modifying the scallop elliptical section ") The number of defects of a large number of products is obviously different from the defects of zero products obtained from the practice of the present invention and other examples. The stress-strain curves of the monofilaments of the four homopolymers CA 'CB, Cc & cd are shown in Fig. 3, and can be compared with the curves of the chain-branched polymer of Figs. 2 and 4-6. Each of the figures in Fig. 3 shows a clear flat portion showing the natural draw ratio of these homopolymer filaments, as is well known. Their natural stretch ratios are listed in Table 01 as " NDR ". It can be seen that the natural stretch ratios of cc and cd are both 1.9X ', that is, they are the same' but. . Stretching at the same time as CD blends can cause a large number of deep dyeing disadvantages. The curve in Figure 2 does not show the corresponding flat portion; this recalled can explain how these filaments can be stretched together without a product disadvantage, which is completely different from most mixed deniers and / or sections (because the filaments are Homopolymer) Unsatisfactory stretch at the same time (read the notes on the back and then fill out this page), 11 Example 2 from the center of the Ministry of Polymerization containing 0.27% TES, 8.9 LRV and 15.4 NRV (6_5Z \ RV) Printed by the Consumer Bureau of the Standards Bureau • I -I II--. At 1600 ypm (1460 m / min), but the rest is basically described as an example 'spinning each filament at 282 C, A mixture of three types of filaments with different cross sections but all 7.16 dpf (8.4 dtex) was produced to obtain the initial spinning filaments, whose properties are shown in Table 2A. The circular filaments were extruded from 520 capillary spinnerets at a rate of 85.2 lbs / hr (3 8.7 kg / hr), and the hollow filaments were crushed from 49 49 capillary spinnerets at 80.4 hr / hr (36.5 kg / Hour), the shape of the pinhole used is basically as shown in Figure 5B of US Patent No. 5,356,582. The scallop sugar filaments were squeezed from a spinneret of 450 capillaries at 7 3.8 pounds / hour (33.5 kg / hour). The stress-strain curve of each single filament is shown in

This paper size applies the Chinese National Standard (CNS) 567255 A7 B7 V. Description of the invention (15) Figure 4, plus curve 3 C, which is the stress-strain curve of 6-groove filament described in Example 3 below.

Table 2 Section A of the project Mod Ten Eb% 2A round 16 0.63 320 2B hollow (7%) 18 0.68 330 2C SO (1.5) 16 0.56 275 will be 1 1 tube of circular filaments, 1 1 tube of hollow fibers Silk and 12 scallop oval filaments were mixed to form a nominal blend ratio of 34% round, 33% hollow and 33% scallop oval filaments, total tow spinning and 125,476 (139,418 dtex ) Of the tow. This tow was basically stretched, crimped, and relaxed as described in Example 1, but the draw ratio was 3.0X, and a drawn tow of about 47,000 deniers (52,000 dtex) was obtained, which contained these three different shape crimps Fibrils (8.4 CPI, 3.3 CPcm, 16.7 CTU), an intimate mixture with a nominal dpf of about 2.85 (3.2 dtex); the properties of these fibrils are listed in Table 2B.

Table 2B (Please read the precautions on the back before filling this page) ······················································································································ 33 47 2.3 17 As in Example 1, the traditional finishing is applied, and the tow is processed and inspected. 18- This paper size is applicable to the national standard (CNS) A4 specification (210X297 mm.

、 Explanation of invention (16

Disadvantages. Surprisingly, as far as the previous #tests of traditional filaments are concerned, the sliver obtained from this example of an intimate mixture of two different profiles (graphics 'hollow and scallop ellipse') does not show any product disadvantages EFD, DDD And SPL, although stretched at the same time. Consumers' sense of weaving may be extremely important to business viability. Woven fabrics can be significantly affected by using a mixture of different cross-section fibers. However, it has not been possible to self-learn homopolymers to draw such filament mixtures at the same time. Example 3 Table 3 A and 3 B summarize the data of primary spinning filaments or drawn tow filaments of two different shape filaments (same as dpf) prepared and processed as described in Example 2, but only The 2 C scallop oval with 4 grooves was replaced by 3 C filaments with 6 groove sections, as described in US Patent No. 5,626,961 (DP-6365-A). As explained in Example 2, the stress-strain curve of this 6-groove cross-section filament is included in Figure 4 as curve 3C. The circular and hollow primary spinning filaments of both Examples 2 and 3 are basically the same.

Table 3 A Project Profile Mod Ten Eb% 3A Round 16 0.63 320 3B Hollow (7%) 18 0.68 330 3C 6-Groove 16 0.60 300 -19- L Degree Applicable to China National Standard (CNS) A4 Specification (210X297 mm ) 567255 Α7 Β7 V. Description of the invention (17) Table 3 Β Section Mod Ten Eb% round 44 2.2 15 hollow 49 2.3 15 6-groove 47 2.3 16 2.85 Nominal dpf (3.2 dtex) stretched tow (8.3 CPI, 3.3 CPcm, 19.9 CTU) shows zero product defects (EFD, ddd, SPL) after processing. Example 4 Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the notes on the back before filling this page) Tables 4 A and 4 B also summarize the data of the four differently shaped filaments prepared basically as in Example 2. . Round filaments are extruded from a spinneret of 286 capillaries at a rate of 70.4 pounds per hour (32 kg / hour); trilobal filaments are at a speed of 44 pounds per hour (20 kg / hour). The 160-capillary spinneret is extruded, and the shape of the holes used is basically as described in Figure XI of U.S. Patent No. 2,945,739; the scallop oval (4-groove) filaments are crushed at 110 hr / hr (50 kg / hr). The speed of extrusion from the spinnerets of 450 capillaries and the hollow filaments were extruded from the spinnerets of 363 capillaries at a rate of 89 4 pounds per hour (40.6 kg / hour). The stress-strain curves of these monofilaments with different profiles are shown in Figure 5. -20- This paper size applies to Chinese National Standard (CNS) A4 specification (210X297 male) 567255 A7 B7 V. Description of the invention (18) Table 4 Item A ------ Section DPF Mod Ten 4A-~ ^ __ Round 11.7 (13.0) 21 0.67 4B Trilobal (1.4) 11.5 (12.8) 22 0.65 4C SO (1.5) 11.4 (12.7) 18 0.71 4D_ Hollow (7%) 11.6 (12.9) _ 19_ 0.67

Table 4B Project profile DPF Mod Ten --- ^ E〇〇 / 4A__ Round 4.9 (5.4) 34 1.7 / 〇22 4B__ Trilobal 3.8 (4.2) 47_ 2.5 __ 13 4C SO 4.3 (4.7) 37 1.9 --- --- 18 4D Hollow 4.1 (4.6) 41 2.3 A Ο • --- s 17 (Please read the precautions on the back before filling out this page, > The 20th bobbin will be printed by the employee consumer cooperative of the Central Standards Bureau of the Ministry of Economic Affairs Round filaments (66,924 deniers, 74,360 cents taxis), three bobbin trilobal filaments (64,400 deniers, 71,555 cents taxis), 4 tube-shaped scallop oval filaments (20,520 deniers, 22,800 cents taxis) and 5 bobbin hollow filaments (21,054 deniers, 23,393 cents taxis) are mixed to form a nominal mixing ratio of 39% round, 37% trilobal, 12% scallop oval and A tow of 12% hollow filaments with a total denier of 172,898 (192,108 cents taxis). The tow was stretched, crimped, and relaxed substantially as described in Example 2 to obtain approximately 64,490 deniers (71,655 cents) The tow is made of four different shapes of crimped (8.9 CPI, 3.5 CPcm, 20 CTU) fibers containing a nominal 4.3 dpf (4.8 cents taxi)-round, trilobal, scallop Ellipse and hollow-the intimate mix-21-This paper size is applicable to Chinese National Standard (CNS) A4 (210X29 * 7mm) 567255 A7 B7 V. Description of the invention (19) The composition of the filaments is shown in the table 4 B. Stretched dpfs are significantly different, although spin-spun dfs are very similar, which shows that it is difficult to predict in advance what results will occur when mixed filaments are stretched together. The conventional finishing is applied as in Example 1. The tow is stretched It is processed to show zero product defects (EFD, DDD, SPL). For example, a magnified photograph of a part of the filament mixture is shown in the figure " 丨 „. Example 5 Table 5 also summarizes the properties of the drawn filaments. The filaments consisted of only two different types of drawn filaments obtained from the drawn tow basically prepared as described in Example 4, but only two different cross sections-round and trilobal-also mixed, which The proportion is -51% for round fibers and -49% for trilobal fibers. (Please read the precautions on the back before filling this page)

--U Table 5B Project profile concentration 0 / 〇Doffs DPF Mod Ten Επ% 4Α Circular 51 20 4.5 (5.0) 27 1.9 λ ν 13 4Β Trilobal 49 35 4.3 (4.8) 39 2.1 15 Employees of the Central Standards Bureau of the Ministry of Economic Affairs The consumer cooperative printed curl measured 8.9 CPI, 3.5 Cpcm, and 22.5 CTU. After processing, the tow showed zero product defects (EFD, DDD, SPL), although the tensile dpfs and filament properties were significantly different from those in Table 4B. Example 6 Basically as described in Example 4 (in this example, no hollow filaments are used), two different deniers of high spinning (high dpfs are called "SO-H ', and low dpf is called" SO-L ") Filaments in the shape of two-leaf and scallops with rounded cross-section; SO-L is based on 7 $ broken / Japanese temple (3 4 -22- This paper size applies to China National Standard (CNS) Λ4 (210X29 フ 公 f) 567255) A7 __________ V. Description of the invention (20) kg / h) The speed is extruded from a 450-capillary spinneret; SO-H and other filaments are as described in Example 4. The spin size of round, trilobal and SO-H filaments is approximately the same, while SO-L is 7.9 dpf (8.8 dtex). The initial spinning properties are shown in Table 6A. The stress-strain curves of the two types of scallop oval single filaments are shown in Figure 6. The continuous lines are SO-H high-density filaments, and the interrupted lines are low-density SO-L filaments. Mix 20 bobbin round filaments, 35 bobbin trilobal filaments, and 4 bobbin SO-H filaments (as in Example 4) with 5 bobbin SO_L filaments (17,775 denier, 19,750 cents taxi) To form a circle with a nominal mixing ratio of 40 g / (), a 38% trilobal shape, 12 / SO-H and 10% SO-L, and a total tow denier of 169,619 (188,466 cents taxi) Of tow. A part of this tow is basically stretched as in Example 2. It is printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs and the Ministry of Economic Affairs (please read the precautions on the back before filling this page). Relaxation to get about 57,01 8 Denier (63,353 cents taxi) drawn tow (8.7 CPI, 3.4 CPcm, 14.8 CTU), which contains circular, trilobal, scallop elliptical height dpf, all 3.9 dpf (4.3 points Taxi) and scallop elliptical low dpf 2.6 dpf (2-9 cents taxi) are intimately mixed; the properties of the filaments are shown in the upper part of Table 6B. The other part of the same tow is processed in another way. Before the stuffing box crimping machine, an additional 145 t of cold and then 'relaxed' is used to obtain the drawn filament tow (丨 6 CPI, 3.0 CPcm '10 .7 CTU), the properties of the filaments are listed in the lower part of Table 6β. -23- This paper size applies Chinese National Standard (CNS) 2i〇, x 297 Gongchu 567255 kl B7 V. Description of Invention (21) Table 6 A Section DPF Mod Ten Eb% Round 1 1.7 (130) 21 0.67 314 Trilobal (1.4) 11.5 (12.8) 22 0.65 266 SO-H (1.5) 11.4 (12.7) 18 0.71 353 SO-L (1.5) 7.9 (8.8) 20 0.69 316 (Please read the notes on the back before filling in. (This page) Printed by the Consumer Standards Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 6B Section Mod Ten Eb% Slack Round 37 1.7 14 Trilobal 32 1.5 15 SO-H 37 1.9 18 SO-L 39 2.2 21 Xu Leng Round 41 2.0 11 Three Leaf shape 32 1.9 12 SO-H 41 2.4 14 SO-L 41 2.5 15 The traditional finishing was applied as in Example 1. Both drawn tows show zero product shortcomings (EFD, DDD, SPL) after processing, although the filaments have significantly different properties from those drawn in other examples. Example 7 -24- This paper size applies the Chinese National Standard (CNS) Λ4 specification (210X 297 cm) 567255 A7 B7 V. Description of the invention (22) Spin both spinning from the same spinneret as described in Example 1 They are all filaments with scallop elliptical cross-section, but using the polymer described in Example 2, the flow area of 5 丨 6 large capillaries (located in 4 rings outside the spinneret) is 0.00002717 square inches. (0.175 mm2) to make heavy dpf SO filaments. Table 7A shows the initial spinning properties of the light and heavy dpf filaments obtained.

Table 7 A Production / lb. Type DPF Mod Ten Eb% 92 (42) Light (1.3) 3.5 (3.9) 12 0.6 175 Weight (1.4) 4.6 (5.2) 11 0.7 291 Mix 3 4 tubes to form a nominal Tow with a mixing ratio of 4/6/6 light / heavy filaments. This tow was stretched at a draw ratio of 2.6X, but the others were stretched, crimped, and relaxed substantially as described in Example 1 to obtain a stretched tow of about 56,000 deniers (62,000 decitex). , Which is a compact mixture containing low and high-density filaments, with a nominal dpf of about 1.85 (2.1 cents taxi). The properties of the filaments are shown in Table 7B ° ---------! (Please first (Read the notes on the back and fill out this page)

Printed by the Consumer Standards Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 7B Blend concentration% DPF Mod Ten Eb% Weight (1.4) 60 2.2 (2.5) 40 1.8 1.2 Light (1.3) 40 1.4 (1.6) 42 2.3 15 Traditional finishing is applied as in Example 1. Collect the tow (CPI 9 · 6, Cpcm 3 · 8) -25- This paper size is applicable to the Chinese National Standard (CNS) A4 specification TTi〇 > < 297 male f 567255 A7 _____B7 V. Description of the invention (23) The conventional tow box is sent to the factory for downstream processing. It is blended with wool to form yarn, and then made into cloth. After satisfactory processing, it shows zero product defects (EFD, DDD, SPL). This Example 7 is similar to Example 1 of US Patent No. 5,591,523, because the scallop elliptical cross sections of different densities are also stretched with the same tow at the same time, but the difference is because the two filaments in this Example 7 are both Different capillary spin spinning of the same spinneret. The present invention does not have any product defects in the drawn mixed filament tow, which is extremely different from the experience of drawing the same mixed filament tow with a homopolymer (2G_T) without any chain branching agent. (Please read the precautions on the back before filling out this page} Printed by the Employees' Cooperatives of the Central Bureau of Standards, Ministry of Economic Affairs -26- This paper size applies to China National Standard (CNS) A4 (210X297 ^^ 1 ---

Claims (1)

567255 Patent No. 87105274 filed in Chinese Patent Application Amendment (June 90) Patent Application Scope 1. A method for forming a mixed polyester fiber tow, which includes the following steps, I-: 1 1---Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs (a): a plurality of spinning holes and rubber melts with different cross-sectional sizes Spinning and branching polyacetate hydrates to form a plurality of molten filament strands; and quenching each of the molten filament strands to form a spun filament bundle containing a mixture having different cross-sectional sizes. 2. The method according to item 1 of the patent application scope, further comprising the steps of: (0) melt-spinning the branched polyester polymer through a plurality of spinning holes of different flow areas; and-(d) quenching each melt Fibrous strands to form a spun filament bundle comprising a mixture of filaments with different denier numbers of monofilaments. 3. The method according to item i or 2 of the scope of patent application, wherein the polymer is at 0.1 to 0.8 mole% The chain branching agent is branch-chain branched. 4. A mixed polyacetic fiber tow, which contains a mixture of filaments with different cross-section sizes. 5. According to the application, the bundle of item 4 of the benefit scope, in which the fiber is further With different monofilament denier numbers 6. The bundle according to item 4 of the scope of the patent application, wherein the filaments contain a polymer, and the polymer is branched with a chain branching agent of 0.1 to 0.8 mole%. 7 · According to the 4th or 5th of the scope of the patent application, the shrinkage of the filament is 0.5 to 3%. (Please read the precautions on the back before filling this page), 1T line!