TWI286581B - Sea-and-island type of deeply dyeable polyester conjugated fiber and method of producing the same - Google Patents

Abstract

Disclosed is a sea-and-island type of polyester conjugated fiber, in which an island component is reformed so as to enable the sea-and-island type of polyester conjugated fiber to be deeply dyed, and a method of producing the same. The sea-and-island type of polyester conjugated fiber includes a deeply dyeable copolyester polymer acting an island component. At this time, the copolyester polymer is copolymerized with 1 to 10 mole % of cyclohexane 1,4-dimethanol based on a glycol component of the copolyester polymer. Furthermore, the sea-and-island type of polyester conjugated fiber is advantageous in that it can be produced using devices for producing a traditional sea-and-island type of polyester conjugated fiber, and an ultra-fine yarn produced using the island component is more deeply dyed than a traditional sea-and-island type of polyester conjugated fiber and has the excellent color fastness.

Description

1286581 The process of the island-type polyester conjugate fiber, and the process of a dyed (dope-dye) island-type polyester co-fiber as described in Korean Patent Publication No. 2002-48331, which has high color fixing property. However, the above-described process for deeply dyeable sea-island type polyester conjugate fibers, when using inorganic silica or titanium dioxide, forms defects on the surface of the polyester conjugate fiber. In the production of ultra-fine yarns, the adhesion of the inorganic cerium oxide or titanium dioxide (aggl〇merati〇n) will be detrimental to the workability of the spinning and the workability thereof will be lowered undesirably. In addition, the dyed island-type polyester composite fiber using carbon black has only one color, which makes it difficult to apply to different fields. Further, the monofilament of the island-in-the-sea polyester fiber is too fine, so that if the sea-island type polyester conjugate fiber is dyed according to a conventional dyeing procedure, it cannot be deeply dyed. Further, after the sea-island type polyester conjugate fiber is dyed, the color-fixing property of the sea-island type polyester composite fiber is lowered because of the low adhesion property of the sea-island type polyester conjugate fiber to the dye. SUMMARY OF THE INVENTION Therefore, based on the problems occurring in the prior art, an object of the present invention is to provide an island-in-the-sea type polyester conjugate fiber and a method for producing the same, wherein an amorphous region of an island component (amorph〇us regi〇n) It is enlarged to enable the sea-type polyacetal conjugate fiber to be deeply dyed. [Embodiment] The present invention uses a previously determined polymer as a sea component and a knife to achieve the object of the present invention. At 1286581, the purpose of the present invention to increase the amorphous region of the island component cannot be achieved. The sea component needs to have a very high solubility in an alkaline solution. Therefore, the readily soluble copolyester polymer proposed in the 'K〇rea pate Application 2003·2003-0026652 is used as a sea component in the present invention. At this time, the easily soluble copolyester polymer is a dicarboxyl isophthalate diethyl ester containing 1 to 6 mol% of a metal sulfenate with a copolyester polymer diacid. Bishydroxy ethyl isophthalate, copolyester polymer diacid 〇·〇1 to 5 wt% of isophthalic acid (isopj^haiic acid), and copolyester polymer monoacid 3 to 15 wt %, average molecular weight is! , 〇〇〇 to 2〇, produced by the copolymerization of 1 1 ring-burning ethylene glycol (p〇lyalkylene giyC〇i). According to the present invention, the copolyester polymer is produced by a τρΑ polymerization process using terephthalic acid (hereinafter referred to as "τρΑ") as a raw material. Moreover, the method for producing a copolyester polymer can be classified into a process using ruthenium as a raw material, and another process using dimethyl terephthalate as a raw material. Among them, the process using τρΑ as a raw material is very competitive in terms of economic efficiency. In the process of producing a copolyester polymer containing CHDM, the unreacted TPA is insoluble and non-refinable. Therefore, unreacted τ2 will block the oligomer filter or polymer filter of the polymerization device, or when the copolymerized vinegar polymer is spun, the unreacted clogging will cause the pressure to rapidly increase the force π, so that The production of copolymerized vinegar polymers and fibers is reduced by 1286581. Therefore, the esterification time must be long enough, and the esterification temperature must be high enough to reduce the amount of unreacted TPA. However, 'in each case, when the esterification time is long or the esterification temperature is high, the production of by-product diethylene glycoside (DEg) will be increased, and the copolyester polymerization will be lowered. The stability of the object. Therefore, it is preferred to reduce the G value (the ratio of the total number of moles of ethylene glycol and CHDM to the molar ratio of 1 mole of phthalic acid) as much as possible to suppress the generation of DEG. According to the present invention, the G value is in the range of ι·ι〇 to le50. When the enthalpy value is in the above range, the DEG component in the copolyester polymer is from 0.7 to 2.0% by weight, whereby the object of the invention to increase the amorphous region of the copolyester polymer is achieved. At the same time, its temperature characteristics have not been reduced. Moreover, when a copolyester polymer is used to produce a copolyester fiber, no problem is caused in the false twinsting process. Since most of the copolyester polymers produced in accordance with the present invention are fibers for making garments, anatase-type dioxygen can be added to the copolyester polymer as is conventional polyester. In the way. In the meantime, in the production of super bright fibers, anatase-type titanium dioxide is not added to the copolyester polymer. However, when producing bright fibers, semi-dull fibers, and full-dull fibers, anatase-type titanium dioxide can be 200 to 500 ppm, 1, 〇〇 〇 to 5,000 ppm, and 10,000 to 40,000 ppm added to the copolyester polymer. Moreover, by weight of the copolyester polymer, 5 wt% of barium sulfate or less may be added to the copolymer of 1268581 to increase the specific weight of the copolyester fiber, or to improve The transparency and friction properties of copolyester fibers. Examples of the polycondensation catalyst may include an antimony type catalyst such as an antimony trioxide and an antimony acetate; a germanium type catalyst such as a germanium dioxide. And catalysts of the titanium type such as tetra-butyl titanate and tetra-isopropyl titanate. In the production of the copolyester polymer, the amount of the polycondensation catalyst used is from 0.01 to 5% by weight based on the weight of the copolyester polymer. According to the embodiment of the present invention and the comparative example, the physical properties of the gray yarn sample were measured in the following manner: 1. IV·: Determination of the intrinsic viscosity (IV·) of the copolymerized vinegar polymer sample, The phenol and tetra-ethane were mixed with each other at a ratio of 60/40, and measured at 30 ° C using an Ubbelohde viscometer. 2. Melting temperature (Tm) and glass transition temperature (Tg): The melting temperature and glass transition temperature of the copolymerized vinegar polymer sample were measured by using DSC7 manufactured by Perkin Elmer Company at 10°. When the C/min is increased in temperature, the peak in the melting range is analyzed. 3. Dyeing ability: The gray yarn sample is subjected to a circular knitting process of 11 1286581 (circular knitting process), which is treated with Μ"% sodium hydroxide solution for 20 minutes" to completely remove the easily soluble portion from the sample. It was then dyed in Kuralon Navy at 130 ° C. The dyeing intensity of each dyed knit was obtained using a spectrophotometer and calculating the K/S value. The present invention has been generally described with reference to the following examples. The examples and the comparative examples will be further understood, and the examples are merely illustrative and not intended to limit the practice of the invention unless specifically mentioned. f Examples 1 to 3 and Comparative Example 1 A polymer of 0.55 dl/g is used as a sea component. Based on the polymer diacid, 5 mM of a metal sulfonate containing bishydroxyisophthalic acid diethyl ester is copolymerized. (bishydroxy ethyl isophthalate), 2 wt% isophthalate, and 6 wt% polyalkylene glycol having a molecular weight of 4,00 Å. Moreover, poly having the properties as described in Table 1 ester The compound is used as an island component. The spinning conditions of the polymer as a sea and island component are shown in Table i, which is spun at 2,800 m/min and has an elongation of i 74, thereby producing 37 islands. An island-type conjugate fiber of 75 deniers/36 filaments of the composition. The properties of the sea-island type conjugate fiber were measured. The results are shown in Table 1. The resulting gray yarn was circularly knitted. The process was treated with 12 wt% sodium hydroxide solution for 20 minutes to completely remove the easily soluble fraction from the sample, and then dyed with Kuralon Navy at 130 ° C. The dyed 12 1286581 color gray yarn, its color The strength was measured by using a spectrophotometer to compare the absorbed light intensity of the dyed gray yarn at 5 〇〇 nm, and the results are shown in Table 1. Obviously, from the foregoing, the present invention provides a Island-type polyacetate conjugate fiber, in which the island-type polyester conjugate fiber has a relatively fine fiber as an island component, and when the sea component is removed from the island-type polyester fiber, the deep layer can be obtained Ground dyeing and ensure that this polyester fiber is absolutely Further, the sea-island type polyester conjugate fiber according to the present invention has excellent temperature characteristics, thereby ensuring work at the time of false twisting, and benefiting from kiL, although the present invention has revealed that The preferred embodiments are to be understood as those skilled in the art, and may be modified and substituted without departing from the scope and spirit of the invention: Add 13 1286581 Table 1 Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 CHDM component 3 6 9 5 30 *G value 1.20 1.20 1.20 1.80 1.20 Intrinsic viscosity (dl/g) 0.631 0.628 0.617 0.627 0.572 DEG Composition (wt%) 1.28 1.34 1.46 2.46 1.78 Co-consumption ratio (weight ratio) 70:30 76:24 70:30 76:24 70:30 Toughness (g/d) 3.76 3.72 3.59 3.63 - Elongation (%) 38 40 37 41 - **K/S 106 112 119 110 - *G Value: (EG + CHDM)/TPA Moerby**K/S: a conventional island-type polyethylene terephthalate The apparent color density is 100 as the basis for estimation. 1286581 [Simple diagram description] No 0

Claims (1)

Patent application scope: 1. An island-type polyester conjugate fiber which can be deeply dyed, which comprises: the first part of the color/meter layer of the music color - the cool arm person / water s day sigma object as an island component, The first copolyester polymer is based on the ethylene glycol component of the first copolymerized vinegar polymer. Xuandi/, 1 to 10 mol% of cyclohexane 1,4-dimethanol of the ethylene glycol component of the polymer. 2) The deep-dye island-type polyacetate conjugate fiber according to the application of the patent scope, the second embodiment, the second copolymerized vinegar polymer as a sea component, the first The dico-polyester polymer is based on the diacid of the second copolymerized vinegar polymer, and from 1 to 6 mol% of the diacid, the diisobutyl isophthalate containing diethyl benzoate Vinegar, 〇〇1 to 5 Wt% of isophthalic acid' and 3 to 15 Wt% of polycycloalkane ethylene glycol having an average molecular weight of U000 to 2M00. 3. As described in the scope of the patent application. The deep-stained island-type polyacetate fiber has a molar ratio (G value) of diol to diacid of 1 to 10 to 1.50' and a by-product diethylene glycol of 0.7 to 2·0 wt%. 4. A method for producing a deep layer of $H per island type polyg|uniform fiber, which uses a first copolymerized vinegar polymer as an island component, and a second copolyester polymer as a sea component, wherein the first The copolyester polymer is based on the ethylene glycol component of the first copolyester polymer, copolymerized with 1 to 10 mol% of cyclohexane oxime of the ethylene glycol component of the first copolyester polymer 4 dimethyl sterol; and the second copolymerized vinegar polymer is based on the diacid of the second copolyester polymer' with 1 to 6 mol% of the diacid containing the metal burning 16 1286581 benzene a sulfonate diethyl hydroxyisophthalate, 0.01 to 5 wt% of isophthalic acid, and a copolymerization of 3 to 15 wt% of polycycloalkanediol having an average molecular weight of 1,000 to 20,000 Produced.