TW568963B - Method for producing polyester fiber suitable for a draw-texturing raw yarn - Google Patents

Abstract

This invention provides a polyester fiber which has physical properties such as a double refraction Deltan of up to 0.07, an elongation after fracture of at least 80%, and a specific weight of at least 1.35 g/cm<3> and is suitable for a draw-texturing raw yarn, and which is produced by cooling polyester filaments melt-spun from spinnerets to up to a glass transition temperature by a cooling air while filaments are being taken up by a take-up roller at at least 3000 m/min, and by heating them to above a glass transition temperature while they are being wound up from the take-up roller into a package by a winding device.

Description

568963

V. Description of the invention (1) TECHNICAL FIELD The present invention relates to a polyester fiber and a manufacturing method thereof, more specifically, a polyester fiber and a polyester fiber used in the raw yarn for processing and processing of the raw silk, L. law. Xinwan Background Technology Among the poly-fibers used in the Jane II H-defense and defense yarns, semi-oriented yarns (partially oriented yarns) are widely used. The polyester semi-stretched yarn is obtained by spinning molten polyester from a spinning tube, and pulling the spinning yarn at a high speed of more than 300 m / min = while cooling and solidifying with cooling air. Can be manufactured. &amp; The polyester semi-stretched yarn obtained by such two-speed spinning and drawing had a breaking elongation of 38 and a birefringence ^ of 0.0. Below 7, the proportion is not full! Physical property value of .35g / cm. In the past, this polyester semi-stretched yarn was used as the representative variety hd-36i (83dtx-36f) of the original false-twisted processing stretch-twisted yarn, and the processing speed was 900-1000 m / min. , The processing tension of 40-50c + N ^ conditions for extended false twist processing, to obtain a residual elongation of about 20-25%, the residual elongation of this type of shirt loose processing yarn because the higher to about 20 -2 5 % Range, so even if used in high-order projects of weaving engineering and knitting engineering, wire breakage does not occur and stable operations can be performed. However, for the purpose of further improving productivity, the extension false twist processing speed is increased to 120 m / min or more, and the processing tension is increased to 55 or more in order to stabilize the tension during high-speed processing. The polyester semi-stretched yarn with the above-mentioned physical property value is used as the raw yarn for the stretch false twist processing, and only the bulk processing freshness with a residual elongation of less than 20% is obtained. Because of the residue of bulk processing silk

568963 V. Description of the Invention (4) — Aromatic dicarboxylic acids and their functional derivatives, adipic acid, sebacic acid, succinic acid, glutaric acid and other aliphatic dicarboxylic acids and their functional derivatives Cycloaliphatic dicarboxylic acids, such as cyclohexanedicarboxylic acid, and functional derivatives thereof. Examples of the glycol used in the copolymerization of the polyester include aliphatic glycols such as diethylene glycol, propylene glycol, butanediol, neopentyl glycol, and cycloaliphatic diols such as cyclohexanedimethanol. Aromatic diols such as bisphenol A and alkylene oxide adducts of bisphenol A.

The polyS fibers of the present invention are characterized by a birefringence Δη of 0.07 or more, an elongation at break of 80% or more, and a specific gravity of 1.35 g / cm3 or more. That is to say, although the previously polymerized semi-stretched yarns have approximately the same physical properties in terms of complex refractive index Δη and elongation at break, the specific gravity is less than 1.35 g / c m3. It has a higher degree of crystallization and has a large tensile strength. Therefore, for example, in the case of 7 5d-36 f (83d tx-36 f), the representative variety of extended false twisted yarn, even if the extension false twisted processing speed is increased to 100 m / min to 1200 m / min or more , And the processing tension is increased from about 49cN to more than 55cN, no breakage will occur and stable extension false twist processing can be guaranteed, and the residual elongation of the resulting bulked processing yarn can be more than 20%, especially It is about 2 to 25%.

In this way, productivity is improved by increasing the speed of the stretch false twist processing speed, and tension variation is suppressed by increasing the tension, so that a high-quality bulky yarn can be obtained. In addition, since the residual elongation of the bulky processing yarn obtained through the extended false twist processing is large, even if it is used in the high-order process of the weaving process and the knitting process, the wire break does not occur, and stable operations can be performed, and Weaving and weaving woven fabrics are made and quality.

Page 8 ------- V. Description of the invention (10) It is also possible to restore the yarn y; hold it above 80%. Other ^ Λη is maintained below 0.07, and the fracture elongation dimension is the same as that in Fig. 1. The effect of W light 3 and heating device 12 is that the polyg fibers intended in this description are used to improve the extended false picking process. As the raw yarn for extended false twist processing, the processed yarn is excellent. Productivity and good quality bulking are obtained, and the previously known extension false twist processing method for extension is not particularly limited. Fig. 5 illustrates the invention ::: method can be applied. Extending false twist processing using raw silk: the fiber should be used as the extension false twist processing. This extension false twist processing is f ^ human soil p sequence configuration plus set 62, ί for the supply of light 61 and extension pro 65, According to ^, / ,, set 62, the cold part device ㈢, the false twister 64, and the downstream side of the extension roller 65 is arranged to take up the jealousy, rub the false picker. Example * After the polyester fiber γ is pulled out from the supply roll 61 by the package P using the dish type at the false picker 64, it is extended by the extension roll 65 and twisted by the false twister 64. This twisting is performed by heating After the device 62 and the cooling device 63 are fixed, the untwisting at the downstream side of the false twister 64 can be used to form a bulk processing yarn Y '. The bulk processing yarn γ is wound by a winding device 66.实施 例 1〜41 1. The π _ fiber is flat. Measure the fineness (d 1 χ) and elongation of the polyester fiber yarns obtained under various conditions. Using the polyester fiber manufacturing apparatus of FIG. 1, the number of spouting holes in the spinning nozzle was set to 36, and the polymerization of each spouting hole was set The output of the object is 1.2 g / mi η, the set temperature of the heating device is 180 ° C, and the pulling speed of the pulling roller and the winding device are different from 3000m / min, 3500m / min, and 4000m / min, 4500m / mi η, manufacture of polyester fiber Λ

Page 14 568963 V. Description of the invention (11) Degree (%), birefringence Δη, specific gravity (g / cm3), the results obtained from table a are shown in Table 1 -a pull speed m / mi η fineness dt x elongation at break% birefringence Δ η specific gravity g / cm3 1 3 000 143 132 0,048 1.350 2 3 500 125 111 0.05 7 1.360 3 4000 109 97 0.066 1.369 4 4500 97 84 0.070 1.377 will be processed as described above and have the provisions of the present invention The four types of polyester fibers with physical properties are used as the raw yarn for the extended false twist processing, and the processing speed is 1400 m / min through the extended false twist processing device shown in FIG. 5, and each processing tension is set to an extension ratio of Ang. Extend false twist processing. The results are shown in Tables 丨 -b. In Table 1-b, the processing tension (stable processing tension) that enables each extension false twist processing to be stably performed is also recorded. As explained in Table 1-b, it can be seen that if the polyester fiber having the physical property value of the present invention is used as the raw yarn for stretch false twist processing, even at a high speed of 14Om / min There is no broken wire, and bulky processed yarn with a residual elongation of more than 20% can be obtained stably. Table 1 -b Examples

Processing tension cN

Residual elongation% 15 2 4 0 2 5 6 2 2 2 2 \\ 312 \ 2d-code \ 90-12 \ 90124044.ptd Page 15 568963 V. Description of the invention (12) Manufactured using polyester fiber as shown in Figure 4 The device sets the number of discharge holes of the spinning nozzle to 3 /, the polymer discharge amount per 1 discharge hole is 1.2 g / min, and the parallel air velocity of the stress relief # U 卩 is 1 2 0 m / min, The set temperature of the heating device is 180 ° C, and the pulling speeds of the traction roller and the winding device are respectively different from 4,000ni / min, 4500m / min, and 50,000m / min. Polyester fiber. When the fineness (dtx), elongation at break (%), birefringence Δη, and specific gravity (g / cm3) of the polyester fiber yarn obtained under each condition are determined, the results in Table 2_a are obtained. a Table 2-Example pulling speed m / min fineness dtx elongation at break% birefringence Δ η specific gravity g / cm3 5 r 4000 143 120 0.046 1.355 0 η 4500 125 98 0.061 1.360 I 5000 109 87 0.069 1.368 _will The three types of polyester vinegars and stalks obtained from the treatment and having the physical properties specified in the present invention were used as the raw yarns for the extended false twist processing, and the extended false twist processing was performed using the same extended false twist processing & strips / pieces as in Example 1. The results are shown in Table 2-b. Table 2 (b) and (b) also collectively record the processing tensions [female fixed processing tensions] that allow stable implementation of each extended false twist process.

V. Description of the invention (13) ___ As shown in the result of Table 2-b, the use of ω poly-fermented fiber as the high speed of m0m / min ^ stretching ^ plus eight raw yarns, even if left in the mouth Bulk processing yarn with an elongation of 2⑽ or more.断 4 ’疋 Get residual Table 2-b Example 5 6 7

Processing tension cN 60 62 60 Residual elongation% 24.9 23.8 25.2 Implemented as ^ (Γη ^ In Examples 5 to 7, except for changing the parallel air flow velocity of the stress relaxation portion-夂 Crη / &quot; 11 5 'in Example 5 Polyester fibers were produced under the same conditions as ~ 7. When the fineness (dtX), elongation at break of the test piece of polyvinyl alcohol fiber yarn, refraction Δη, and specific gravity (g / cm3), the results in Table 3-a were obtained. Table 3 -a

568963 V. Description of the invention (14) Three polyester fibers with the physical properties specified in the present invention obtained as described above are used as the raw yarn for the extended false twist processing, and the extended false false processing conditions are used for the extended false false processing. Twist processing. The results are shown in Table 3-b. In Table 3-b, the processing tension (steady processing tension) that can be stably performed during each extension false twist processing is also recorded together. As clarified by the results in Table 3-b, it can be seen that if the poly-S purpose fiber having the physical property values of the present invention is used as a raw yarn for stretch false twist processing, it can be used even at a high speed of 1,400 m / min. It will not invent broken yarns, and can stably obtain bulk processed yarns with a residual elongation of more than 20%. Table 3-b Example processing residual tensile elongation cN% 8 62 26.3 9 63 26.2 10 62 26.5 Comparative Examples 1 to 3 A device without a heating device in the polyester fiber manufacturing device of FIG. 1 was used. The number of ejection holes is 36, and the polymer ejection inside of each ejection hole is 1.2 g / mi η, and the pulling speed and winding device are respectively used to pull the speeds to 3000m / min, 3500m / min, and 4000m / min. min, making polyg fibers. When the fineness (dtx), elongation at break (%), birefringence Δη, and specific gravity (g / cm3) of the polyester fiber yarn obtained under each condition were measured, the results in Table 4_a were obtained.

Page 18 568963 V. Description of the invention (15) Table 4-a Comparative example drawing speed m / mi η Fineness dt χ Elongation at break% Birefringence Δ η Specific gravity g / cm3 1 3 000 143 135 0.044 1.332 2 3 5 00 125 108 0.056 1.335 3 4000 109 93 0.068 1.338 The three polyester fibers obtained as described above that do not have the physical properties specified in the present invention are used as the raw false-twist processing yarn, and the same conditions for the extended false-twist processing as in Example 1 are used. Extend false twist processing. The results are shown in Table 4-b. Table 4-b also shows the processing tension during each false-twisting process. As explained in the results of Table 4-b, it can be seen that if the polyester fiber having the physical property value of the present invention is used as the raw yarn for extended false twist processing, if the processing speed is 14 00 m / min, the filament will frequently break. , And can not obtain bulk processing yarn with a residual elongation of more than 20%. Table 4-b

Comparative Example Residual Tension of Processing Tension cN% 1 60 12.3 2 59 13.6 3 6 1 13.5 Page 19 568963 V. Description of the Invention (16) As mentioned above, if the polyester fiber according to the present invention has a specific gravity of 1. 3 5 g / c m3 or more, even if the crystallization of the molecules in the fiber, the extension false twist processing speed is increased, and the processing tension is increased, it also has the anti-tension that does not break the yarn. In addition, because the specific gravity is high and the birefringence Δη is 0.07 or less, and the elongation at break is 80% or more, the residual elongation of the bulked yarn after the extended false twist processing can be made to be 20% or more. . Therefore, even if the bulk processing yarn is supplied to higher-order processes such as weaving process and knitting process, the yarn breakage does not occur, and the operation can be stabilized. In addition, since the yarn is not broken in high-level processes, a high-quality knitted fabric can be obtained.

Industrial Applicability It can be used for the production of polyester fiber in the fiber industry, especially for the development of raw yarn for false twist processing. [Explanation of component number] 1 Rotary pulley 2 Cooling device 3 Traction roller 3a, 3b roller 4 Winding device 5 Metering pump

6 Spinning package 7 Spinning nozzle

7 a Spit 孑 L 8 Cooling unit body 9 Blower

Page 20 568963 V. Description of the invention (17) 10 Blowout port 11 Oil guide tube 12 Heating device 13 Rotary pulley 14 Contact roller 15 Guide wire travel mechanism 20 Reflector 21 Halogen lamp 22a, 2 2 b Electrode 42 Cooling device 48 Cooling section body 49 Blower 50 Blowout port 51 Stress relief section 52 Inner tube for air flow 53 Outer tube for air flow 54 Stress relaxation section body 56 Blower 61 Supply roller 62 Heating device 63 Cooling device 64 Fake detector 65 Extension roller 66 Winding device 119 Meeting _ 雠

Page 21 568963

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568963 Brief description of the drawings Fig. 1 is a schematic diagram illustrating an apparatus for carrying out the method for producing a polyester fiber of the present invention. FIG. 2 illustrates a heating device used in the device of FIG. 1, and is a view taken along the arrow B-B of FIG. 3. Fig. 3 is a view of arrow A-A of Fig. 2. Fig. 4 is a schematic diagram illustrating another aspect of a method for producing a polyester fiber according to the present invention. Fig. 5 is a schematic view illustrating an extension false twisting device.

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Claims (1)

568963 _ Case No. 90124fUzl ^ A method for manufacturing false-twisted processing yarn of poly-brewed fiber, which is characterized by: 6. Scope of patent application _ Out of the nozzle = production: down ^ r The reel is wound into a roll by a retraction device Before the installation (Package), add 埶 at a temperature higher than the glass transition temperature to obtain a birefringence Δη of 0.07 or less, an elongation at break of 80% to 14%, and a ratio of ^ 1 · 35 to 1 · High forward unstretched polyester fiber with a physical property value of 377g / cm3. Man-This high-direction non-stretched polyester fiber is used as the raw yarn for false-twist processing. The false-twist processing is performed at a speed of 12,000 m / min and a tension of 55 states to form a residual elongation. It is 20 ~ 26 · 5% bulked yarn. 2 · If the method for manufacturing a polyester fiber false twisted processing yarn according to item 丨 of the special application is applied, wherein the cooling side is cooled by blowing cooling air from one side of the polyester yarn melt-spun, and the pulling of the traction roller is performed The speed is 3000 ~ 4500m / min. 3. The manufacturing method of polyester fiber false-twisted processing yarn according to item 1 of the patent application scope, wherein the entire circumference of the polyester yarn produced by the melt spinning is blown with cooling air for cooling, and then the cooling wind is applied to the downstream side. Flow parallel to the direction of travel and relieve stress, while setting the pulling speed of the traction roller to 3000 ~ 5000m / min. C: \ master file \ 90 \ 90124044 \ 90124044 (replace)-2.pt page 24