TW200532061A - Conjugated fiber and method for producing the same - Google Patents

Abstract

To provide a crimp forming conjugate fiber excellent in stretchability and improved in product stability in post processing and a method for producing the same. The crimp forming conjugate fiber is a side-by-side or an excentric sheath-core type fiber remarkably stable for heat hysteresis, tension and the like given to the fiber in knitting, weaving and dyeing processing. The stretchable conjugate fiber produced by the invention is remarkably excellent in product stability during post processing as the fiber has high stretchability with ≥ 40% rate of crimp stretch, ≥ 70% elastic recovery factor, ≥ 155 DEG C maximum temperature of thermal contraction stress and ≥ 3% iron shrinkage of the finally processed fabric. Different fiber forming polymers having 5,000-70,000 number average molecular weight difference and 1.5-2.5 molecular weight distribution index in each fiber are used as the polymer.in the invention.

Description

200532061 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a crimped composite fiber having excellent stretchability and improved product stability during post-processing, and a method for manufacturing the same. More specifically, it relates to a side-by-side or eccentric core-shaped crimped composite fiber and a manufacturing method thereof. The crimped composite fiber has high stretchability, a crimp elongation rate of 40% or more, and an elastic recovery rate of 70% or more. At the same time, because the maximum temperature of heat shrinkage stress is 155 ° C or more, the fiber is very stable to the heating process and tension during weaving and dyeing. [Prior Art] ^ Patent Document 1 discloses a method using two types of polyethylene terephthalate (PET) having a difference in limiting viscosity. In addition, Patent Document 2 and Patent Document 3 disclose a method for producing a polyester fiber having latent crimping performance by using ordinary polyethylene terephthalate and high-shrinkage copolyethylene terephthalate. . In addition, Patent Documents 4 and 5 also propose the use of stretchable polyethylene terephthalate (PTT) or polybutylene terephthalate in polyethylene terephthalate (PET). Diester (pBT) method. However, when the crimped stretchable composite fiber manufactured by the conventional manufacturing method described in the above-mentioned patent is used in subsequent steps, the reduction of tempeh is generally greater than or equal to 10%, and even in the final processing / welding At the same time, a deformation of 3% or more must occur, which causes problems. ^ It is difficult to set the conditions during the processing of the product, and it is difficult to stabilize the sewing rule. Generally speaking, fiber products are knitted, dyed, heat-fixed, and ironed. Hot page 8 200532061 V. Description of the invention (2) Yeah, the thermal process of Scripture 130 ~ 190C and the tension of 1 ~ 2g / d. The morphological stability of the product to heat is an important factor that determines the quality of the product. Therefore, in order to minimize the morphological deformation of the product during ironing, the problem of morphological deformation of 3% or more during ironing in the prior art must be solved. The inventors recognized that the shrinkage rate of the processing cloth during ironing is closely related to the maximum temperature of the thermal shrinkage stress of the fiber, and further know that when the maximum temperature of the thermal shrinkage stress is greater than or equal to 5 5 it, The shrinkage of the processed fabric during ironing is 3% or less, and the final product has excellent morphological stability. . In addition, 'Patent Document 6 describes the expansion and contraction of the maximum temperature of the heat shrinkage stress of ^ 0 ° C and the maximum peak value of the heat shrinkage stress of 0 · 20cN / dtex, but does not mention the final fiber product form. Sexual effect. Generally speaking, compared with ordinary fibers, stretchable fiber products are sensitive to thermal processes and tension during the weaving / dyeing process, heat fixing, and ironing, and their morphological stability is a problem. This has an important impact on the uniformity of the dyeing of the product, the dyeing process and the dimensional stability of the sewing product. Generally, the shrinkage rate of ironing is used as the standard. If the shrinkage rate of ironing is greater than or equal to 3%, the quality of the product is considered to be poor. . In addition, the existing patents on stretchable composite fibers generally only relate to composite spinning obtained from different polyester polymers, and do not mention the influence of the molecular weight of the different fluorene molecular polymers themselves on the physical properties of the composite fibers. In Patent Document 4, although it is mentioned that polyethylene terephthalate (PET), poly (trimethylene pivalate) (PTT), modified PET and modified PTT have different dryness, the corresponding physical properties It's different, but the patent doesn't mention it

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Molecular weights of the different polymers that make up the composite fiber. Of course, through the Mark-Hawink equation, although the molecular weight can be inferred from the molecular weight relationship of dry households, information about the denier distribution cannot be obtained. In addition, Patent Document 4 mentions the use of pTT or PTT-PET, PTT-PBT and other two kinds of polyester ^ polymers with different viscosity differences in stretchable composite fibers, but this does not include molecular weight and ^息 distributed # 息。 The inventors have found that the molecular weight, molecular weight distribution, and stretching of two polymers with different dryness differences are different. The heat = constant temperature is the highest temperature that affects the thermal shrinkage stress of the fiber, the expansion and contraction characteristics, and the processing fabric. Factors of shrinkage when ironing, and designed the best molecular weight and the best molecular weight distribution of the two poly-8. [Patent Document 1] Japanese Patent Application Laid-Open No. 10-72732 [Patent Literature 2] Japanese Patent Application Laid-Open No. 2000-328378 [Patent Literature 3] Japanese Patent Application Laid-Open No. 9-41234 [Patent Literature 4] US Patent No. 3 6 7丨 3 7 9 [Patent Document 5] Japanese Patent Application Laid-Open No. 1 89923 [Patent Document 6] Japanese Patent Application Laid-Open No. 2000-5430 [Abstract of the Invention] The object of the present invention is to provide a crimped composite fiber and In its manufacturing method, the crimped composite fiber uses a fiber-forming polymer that can be industrially used, which has excellent stretchability and excellent morphological stability of the product. Therefore, ‘the present inventors have conducted a careful and careful study in order to satisfy such an object’, and found that using a polymer that also forms fibers,

200532061 V. Description of the invention (4) The difference is 500 ° ~ 700 °, and the elasticity of each molecular weight distribution index hurts the composite fiber made of different fiber-forming polymers. Once you ’ve finished, It was found that a fiber-forming polymer having a number average molecular weight of 10,000 to 20,000 and divided into 1,5 to 2.5 was used as the first polymer, and the molecular weight distribution index was i5m to 9gggg. The polymer of the fiber is used as the second component. Each polymer is the best polymer with the smallest morphological deformation during the polymerization when the first component is composed of the second component. Polymerization:; = 2 = t is equal to 5_ 'It is difficult to find the curling elongation and dagger of the original yarn: 牛牛: When it is greater than or equal to 7,000, the disadvantage is' the molecular weight of the spinning temperature is low, its effect cannot Manifested, and the spinning effect is difficult to ensure the processability. The stomach molecular weight enhances the shrinkage effect and leads to poor shrinkage. In addition, the reason why the molecular weight distribution index is limited to 1.5 to 2.5 is that if the molecular weight distribution index is less than 1.5, the molecular weight distribution is not easy to be uniform, and the plasticity of the low molecular weight substance becomes minimal, and it is easy to cause problems in the jade order.而; When the molecular weight distribution index is greater than 2.5, the molecular weight distribution becomes larger, resulting in the effect of mixing several polymers, so when the heat fixing temperature is raised to a certain level, " the phenomenon of the last day U Shi was d == ' In the end, it is difficult to increase the southernmost temperature of the heat shrinkage stress, resulting in a decrease in morphological stability and stretchability. ^ In addition, the inventors have also found that for polymers with high molecular weight, the molecular weight is severely reduced due to thermal decomposition between spinnings, which further expands = volume distribution ', but the polymer in the spinning assembly is dazzled. The residence time is minimized, such as' π to a maximum of 5 minutes

200532061 V. Description of the invention (5) The physical properties and functional properties caused by the above characteristics are exerted. As another aspect of the present invention, it is known that a stretchable composite fiber is used in Satoshi: 10% or more obtained by melt spinning, and even if the shrinkage of the fabric is greater than a lifetime It is equal to 3% of the shape deformation, σ force, and it is necessary to send pieces when ironing. It is difficult to stabilize the size of the sewing product. ：： 缱 二 It is difficult to set the strips. Processing, heat fixing, and scalding are subject to howling ^ woven-

Wd tension, but the shape of the product is stable. Shrinkage must be controlled to 3% or less. This kind of ::::: The maximum temperature of the shrinkage stress is closely related. Second, the dimensional ,,,, and yield are increased to greater than, etc. C's water off: time ^ excellent qualitative. When they are water-dried, the shape of the extensible products is stable. * Ϊ́ ί The stretchable composite fiber manufactured by the invention has high stretchability. Its P elongation is greater than or equal to, and the elastic recovery rate is greater than or equal to 7 ()%. The highest temperature of stress is equal to or greater than 155t, so the most processed fabric: shrinkage rate of less than or equal to 3%, and product stability during post-processing: Good by reducing the residence time of the polymer in the spinning assembly, so that the fraction = quantity The reduction of the physical properties and the reduction of the elasticity of the raw silk is minimized, so that the composite fiber produced according to the present invention improves the maximum temperature of the heat shrinkage stress compared with the existing two raw silks. . In addition, since the original yarn has high elongation and excellent stretchability, the composite fiber produced according to the invention can be applied to various applications such as fabrics, weft-knitting, and warp-knitting. 200532061

[Embodiment] The present invention provides a stretchable composite fiber with excellent morphological stability, which is obtained by using two kinds of fiber-forming polymers that can be melt-spun on a daily basis. 2 = the maximum temperature of the heat shrinkage stress is equal to or greater than 5 5 〇 c. The Buddha is under no load. The crimp elongation after being processed is 40% or more, the elastic recovery rate is greater than or equal to, and the ironing dimensional change rate of the processing fabric made therefrom is less than or equal to one. In addition, it is characterized in that one of the polymers is polyparaphenylene terephthalate ~ Ester, whose number average molecular weight is 1 0 0 0 0 ~ 2 0 0 0 0, molecular weight distribution refers to 2 2 h 5 ~ 2 · 5; another polymer is polytrimethylene terephthalate, "I = molecular weight It is 15 ~ 9_Q, and the molecular weight distribution index is 155. The difference between the number average molecular weights of the two polymers is 5000 ~ 7000.

In addition to B2, it is characterized in that one of the polymers is poly (terephthalate), and its number average molecular weight is ΐθθθ〇 ~ 200,000, and the molecular weight distribution refers to 222-5 ~ I5; the other The polymer is polyethylene terephthalate, polyf :: butylene formate, or polyethylene terephthalate copolymer, and its ywo,, molecular weight distribution is 5 to 2, 5, the number of polymers The difference in average molecular weight is 5,000 to 70,000. The cross-sectional shape is preferably a side-by-side type or an eccentric core-sheath type.

In addition, it is preferable that the crimp diameter is 8 mm or less. Ϊ: 1 This method provides a flexible composite fiber office with excellent morphological stability, which includes the following steps: (A) two types of polyester are melted, and one of the polymers is polyparaphenylene terephthalate Esters, octa-average molecular weight is 10,000 ~ 20,000, molecular weight distribution name

Page 13 200532061 V. Description of the invention (7) The number is 1.5 ~ 2.5; the other polymer is polytrimethylene terephthalate, and its number average molecular weight is 1 500 0 ~ 9 0 0 0, molecular weight distribution The index is 丨 · 5 ~ 2.5; (B) passing the smelt through the spinning assembly, and controlling its residence time in the spinning assembly to be less than or equal to 5 minutes, and then using 2 2 0 0 ~ 5 0 0 〇M / min spinning speed is collected, collected into parallel or eccentric core-sheath composite yarn; (C) the collected composite yarn is drawn at a temperature of 85 ~ 95 ° C and at 160 ~ 220 ° C The temperature is thermally fixed.

In addition, the present invention provides a method for producing a stretchable composite fiber with excellent morphological stability, which includes the following steps: (A) melting two polyesters, one of which is polyethylene terephthalate, and the number is equal The molecular weight is 10000 ~ 2000, and the molecular weight distribution index is 1.5 ~ 2.5; another polymer is polyethylene terephthalate, butylene terephthalate or polyethylene terephthalate A diester copolymer having a number molecular weight of 150,000 to 90,000 and a molecular weight distribution index of 15 to 2.5; (B) passing the melt through a spinning module and controlling its residence time in the spinning module Less than or equal to 5 minutes, and then collected at a spinning speed of 2200 ~ 5000 m / eight minutes, charged into a side-by-side or eccentric core-sheath type =

jc) The collected composite yarn is drawn at a temperature of 85 to 951 and heat-fixed at a temperature of 160 to 220 c. Eight = except, the manufacturing method of the stretchable composite fiber of the present invention is preferably:. It is manufactured by knife-end drawing / false twist process or spinning direct drawing process.

Page 14 200532061 V. Description of the invention (8) In addition, it is preferable that the stretching temperature is 85 to 95 t, and the thermal fixed temperature production is 160 to 22 (TC. In addition, the present invention provides a processing wire, which is made of the stretchability. Manufacture of composite fibers with a twist count of 150 to 2000. In addition, the present invention provides mixed fiber filaments, which are the said stretchable composite fibers = sexual raw yarns having an elongation of 50% or more and a water shrinkage of 15% or more. In addition, the present invention provides a fabric containing the stretchable composite fiber. Dimensions of the polymer of the composite fiber with the least deformation at two times and the characteristics of the stretchable composite fiber and its formation: dimensional polymer About the material material, the manufacturing method using the polymer material, and the characteristics of the polymer that can form a fiber in combination with the method of polymer analysis and its characteristics, the difference between the polymer used in the present invention is 500 0 to 700 00, and eight nA S In order to make the number-average molecular weight of a component must be the number-divided amount, the index is U ~ 2.5 ', where the index is ι.5 ~ 25, and the other two are 100,000 ~ 200,000, molecular weight. Distribution ^ 〇〇〇〇〇 ^ The polymer used can be conjugated and these 4b substances Therefore, & industrially used polyester, nylon and other poly-substance-modified polymers, etc. In addition, poly200532061 V. Description of the invention (9) ---- olefin expansion 'polymers' ㊆ & These polymers have the problem of high temperature processes, so it is difficult to practically use them. In order to use polyester or two + + (σ 2 and some modified polymers, specific examples can be gathered. Benzene: terephthalic acid: polyesters such as polyethylene terephthalate, poly (trimethylene terephthalate), formazan = 4 butadiene, etc .; these polyesters are modified by m-xylylenediol, etc. Copolymers; and nylons such as nylon 6, nylon-like prostitutes; these nylons are modified by m-toluidine; poly: 4 'polymers that can be melt-molded. Molecular weight: cloth dm number! :, R °°°° ~ 2 °°°°, not to say that the distribution index of j ^ knife is determined to be 1.5 to 2.5, which does not say =: =: L compound and polymer of another component, 2 levels … The amount of the two is the number average molecular weight of the coffee is' ',,' n .5, the other polymer is only ~ 2.5. M is also ~: 000, molecular weight distribution index is 1.5 2_ And the molecule, for example, the number-average molecular weight is moo ~ ethylene formate index is 1.5 ~ 2 5 poly ^ cheli 00 ~ 90,000, and the molecular weight fraction polybutylene terephthalate can be Λ polyterephthalic acid Twenty-two vinegars: Ethyl alcohol " P, as long as,: ίί can also be the same as polyparaben and molecular weight distribution #Number in Tai: 彡 The number average molecular weight difference obtained by chromatography has nothing to do with the range of its species , And the polymerization: ί number average knife is set to moo ~ 20,000 and the molecular weight distribution means ^^ Ming page 16 200532061 ~ 2.5 polymer is called a low molecular weight polymer, and the number average molecular weight is ljOOO ~ stomach 9000 > A polymer with a molecular weight distribution index of 0 and 5 to 25 is called a south molecule. These polymers are manufactured using well-known bulk polymerization, solution polymerization, and table polymerization. The polymers to be targeted in the present invention may be polymers produced by any of the following methods. Bulk polymerization: melting is particularly preferred. Polymers manufactured by polymerization or solid polymerization are advantageous in terms of funding for such polymerizations. 1 η η n The minimum molecular weight of low molecular weight polymers is

The highest molecular weight of a polymer with a low molecular weight is set to 90,000, and. There are no difficulties in producing polymers having a molecular weight of less than 10,000 versus polymerization methods. However, it is made into a sheet-like (or granular) shape I, and is produced by using a polymer for fibrillation. When κ π with a molecular weight of less than 1 0 0 0 becomes flakes, it is very easy to form crushed powder, and it is difficult to make it with uniform = door flakes. If the molecular weight is greater than 9 0 0 0, it is difficult to use the melt polymerization chip I and the bulk polymerization method. Even if this is possible, the manufacturing time will be not only economically disadvantageous, but also because the spinning must be excessively improved. The molecular weight is reduced by thermal decomposition, and its effect cannot be reflected.

Bawai 'limited the molecular weight distribution index to 1.5 · 2.5 ~ 2.5. This is because if the low eight I t amount distribution index is less than 1.5, the molecular weight distribution is too uniform. The process comes to 7 €, and when the molecular weight distribution index is greater than 2.5, the molecular weight distribution is changed to the effect of mixing several polymers, so when the heat-fixing temperature is raised above a certain level, plasticization by a hot plate occurs. Phenomenon

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Decreased morphological stability and expansion and contraction It is difficult to raise the maximum temperature property of the heat shrinkage stress, so it is not preferable. • The number average molecular weight and molecular weight distribution index in the present invention are obtained by dissolving polymerized or prepared composite fibers in hexafluoroisopropanol (HFIp), and using i

Water temperature company's GPC equipment uses polystyrene as a standard to make the number average molecular weight (Mη) and weight average molecular weight (Mw), and change the "quantity distribution index (PDI)" from the following formula.

PD I = Mw / Mn (2) Production of composite fibers The polymer spinning temperature during melt spinning to produce composite fibers is set to a temperature which is 20 to 70 ° C higher than the melting temperature of each polymer. When the spinning temperature of the polymer is higher than the melting temperature of the polymer by less than 20 t, uneven melting results in an excessive increase in the pressure in the extruder, which reduces workability. In addition, the resulting composite fiber may also occur. The problem of uneven physical properties is not preferred. In addition, the spinning temperature of the polymer is higher than the melting temperature of the polymer by more than 70 ° C. Although the fluidity of the polymer is improved, there are problems such as thermal decomposition of the polymer, so it is not preferable. The discharged fibrous polymers can be joined directly below the spinning nozzle to obtain a composite fiber with a side-by-side cross section. In addition, the polymers can be joined while entering the spinning nozzle through the distribution plate. Fabrication of eccentric core-sheath cross section. In addition, the inventors also found that for polymers with a high molecular weight,

200532061 V. Description of the invention (12) Said 'Due to the thermal decomposition between spinnings, the molecular weight has been severely reduced, and the molecular weight distribution has been increased', but if the polymer melt in the spinning assembly is minimized ^ ^ residence time, for example, less than When it is equal to 5 minutes, the physical properties and functional properties due to the above-mentioned characteristics can be maximized. The composite fiber obtained by Λ can be fiberized using a partially oriented yarn drawing / false twisting process or a direct spinning spinning process commonly used in the production of polyester composite fibers. The constituent element of the core technology of the present invention is to control the spinning speed to 2200: 5500 m / min. The reason is that when spinning at a spinning speed of less than 2200 m / min, low-speed spinning causes a decrease in the amount of polymer melt to be discharged. No, it is not economically disadvantageous, and the heat shrinkage rate during stretching As the stretching ratio increases, the shrinkage rate at the end of ironing is 3% or more, and the shape stability of the product against heat decreases sharply. In general, the low-spinning fiber formed by high-stretching crystalline fibers exhibits high heat resistance. In addition, spinning at a spinning speed of 5000 m / min or more =, two different molecular weights Different polymers have different thermal properties, physical properties, and square silk properties, and the stability of the spinning process is lowered, which is not preferable. * Thousands q Μ 疋 A Μ ^ ^ indicates that the characteristics of another core technology component is that when manufactured through partial quotation, application / spinning process or spinning direct drawing process, the drawing temperature of y is 85 ~ 95t: When the rail is fixed at η, the temperature is controlled to be less than or equal to 85 degrees and the degree is 160 to 22 (KC. It is difficult to stretch uniformly at each J of the lake where the rake is pulled, and it is stable when it is greater than or equal to 95 ° c. When the degree becomes larger, the processability and physical properties at the time of spinning become less ~…, when the degree is less than or equal to 160, the maximum heat shrinkage stress

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The temperature is less than or equal to 1 5 ° C, and the final processing cloth has a high yield when ironing ^ ', which makes the shape and stability of the product uneven and reduces the " * quality of the final product, so it is not preferred. In addition, when the heat-fixing temperature is equal to or higher than Mo, severe plasticization occurs, and process properties and various physical properties are weakened. Therefore, H is not preferred. For existing stretchable composite fibers that exhibit crimpability, the problem is that when used in subsequent steps, the shrinkage of the fabric is generally greater than 100%, and even after the final processing, it is necessary to iron the fabric. Morphological deformation of 3% or more occurs, and it is difficult to set the conditions during product processing, and it is difficult to stabilize the size of the sewn product. Ordinary fiber products—generally subjected to weaving / dyeing processing, 埶 fixing, and scalding 丨 3 0 ~ 丨 9 〇t; thermal process and the force of ^ 2 g / d, = hair date: the form of the product found by people The stability and the maximum temperature of the heat shrinkage stress of the fiber have a relationship between the beginning and the cut. When the maximum heat shrinkage stress is 155 ° or higher, the product has excellent morphological stability. Table 1 shows the functionality of the fibers obtained according to the spinning conditions of the present invention. Examples Hereinafter, the present invention will be described in more detail based on examples. It is an example to illustrate the present invention, and does not constitute the following practical examples. First, the method, physical property evaluation standard and measuring method of the method according to the present invention will be described. ((A) Measurement of thermal shrinkage stress of s-type composite fiber) The initial load was 0.5 g / d and the temperature rise rate was measured with a Kanebo thermal stress tester. > Under the conditions, Lee 200532061, Description of the invention (14) (b) Measurement of number average molecular weight and molecular weight distribution Dissolve the polymer or composite fiber in hexafluoroisopropanol (Η {? 丨 p) Use The high-temperature Gpc equipment of Waters Company in the United States measures the number average molecular weight (Mn) and weight average molecular weight (Mw) with polystyrene 'quasi-substances, and calculates the molecular weight distribution index (PD 〖) from the next 1. [Formula 2] PD I = Mw / Mn (c) Measurement of curl elongation and elastic recovery rate To measure the composite elongation and elastic recovery rate of the crimp produced as an example, the following operations were performed. Fiber physical curl

-The fiber bundle is immersed in boiling water under no load. After immersing for 30 minutes, it is dried in the chamber at the above temperature. A load of 0 lg / d was applied, and after 2 minutes, the load f was released and left for 10 minutes. The sample subjected to the above steps was left under a load of 002 g / d for 2 minutes, and then the length at this time (L1) was measured. A load of 0.1 g / d was applied to the sample, and the length (L2) was measured after 2 minutes. Thereafter, a load of 0.1 g / d was removed, and after 2 minutes, the length (L3) at the time point was measured. The curl elongation rate and elastic recovery rate were calculated by the following formula.

Curl elongation (%) = [(L2-Ll) / L2] X 100. Elastic recovery rate (%) = [(L2-L3) / (L2-LI)]] X 100 (d) Measurement of Ironing Shrinkage After conventional weaving and dyeing processes, the ironing shrinkage was measured based on KS K 0 5 58-2001, A-1 (dry heat ironing method). (e) Measurement of crimp diameter: 20 fibers were randomly selected, and the crimp under its own weight was measured with an optical microscope.

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V. Description of the invention (15) Diameter, and then calculate the average value. Example 1 In the production of crimped composite fibers, polyethylene terephthalate having a number average molecular weight (Mn) of 1,263, and a molecular weight distribution index (PDI) of 22, and a number average molecular weight (Μη) of 19,149 were used. Polytrimethylene terephthalate with a molecular weight distribution index (pDi) of 2.4, and its weight ratio is 5.5, = melt composite spinning equipment, with the eccentric core-sheath section of Figure 2_ (d), set The reed spinning temperature was 270. (:, Spinning speed of 2200 m / min, internal lag of the module = min, and a polyester composite fiber drawing device with a monofilament fineness of 3.4 denier will be obtained by the spinning / winding The composite η is made of a spring-type curling stretchable composite that has a 2 C fineness of 2 "denier. The stretching ratio during stretching is 175, the stretching degree is 85 ° C, and the heat setting temperature is 丨6 〇t, straight yarn: The fabric exhibits very excellent stretch characteristics and Table 1. Example 2 In the production of crimped composite fibers, a number average molecular weight (Mn) of 385 is used as a sub-quantity distribution index (pDI) of Polyethylene terephthalate of 21 ^ 33522 ^^^^^ (PDD ^ melted into the present; propylene formate '纟 weight ratio is 5: 5, using the existing silk "silk equipment, as shown in Figure 2_ (a) Side-by-side cross section, set the spinning speed of the spinning room to 2 m / min, and use a straight knife to pull the polyester composite fiber with a fineness of 3.4 denier when staying in the package. The drawing will pass through the spinning / Reeled composite fiber drawn & crimp type stretchable composite fiber with spring shape crimp

200532061 V. Description of the invention (16) dimension, the monofilament fineness is 2.1 denier. Stretching The stretching temperature was 90. &lt;: The heat-fixing temperature is i 8 01: Dragon: m, ^ j ^ t «. ^, ν; ^ Λ ° In the manufacture of crimped composite fibers, 182U and a molecular weight distribution index (pDI) of 21 ^ Nine pairs of n-benzyl monoacetate, malonyl acetate with a number-average molecular weight (Mn) of 88245, and a molecular weight of Yoshihiro Y. Wen-Yi, 16 + Xiao-Tian Quegong Knife Chili Cloth Index (PDI) is? << The melt-coupling spinning equipment with a weight ratio of 5: is shown in Fig. 2— (a) in a side-by-side type with a silk temperature of 285 ° C and a spinning speed of 3800 m / °. 1 ::::, a composite fiber dimension obtained by spinning / winding of a polyester composite fiber with a fineness of 3.4 denier, 1 μM Γ &amp; crimped crimp type stretchable composite fiber technical extension "Daniel. Pull The stretching ratio during stretching is u stretching, the plate temperature is 90 C, and the heat-fixing temperature is 17 (rc. The silk and fabric of the surname show inexperienced from the cents μ &amp; ~ the results are not as shown in Table 1: Stretching properties and morphological stability. Example 4 In the production of crimped composite fibers, a polyethylene terephthalate having a number average molecular weight (μ H H distribution index (PDI) of 2.2) 2 2 ^^ ^ 25984 ^ ^ (PDI) ^ , A, Koben—propylene formate, with a weight ratio of 5: 5, using the current ancient silk temperature, combined spinning equipment, with a side-by-side cross-section of Figure 2-U), set the spinning room to 8 5 c. Spinning speed is 2600 m / min, and the retention time within the module is 1 to 4 for the bell 'to produce a polyester composite fiber with a monofilament fineness of 4.6 denier.

Page 23, 200532061 V. Description of the invention (17) Using other drawing devices, the spinning / rolling is stretched to produce a roll-curling type that gives the elastic blue shape a curl shape to obtain 2 ^ dimensions, and the monofilament fineness is 2. Daniel. When stretched, it is stretched at a temperature of 9 Gt and thermoset; the temperature is 16 (rc, 1 = U, the yarn and the fabric exhibit the usual excellent stretch characteristics and Ύ = Table b Example 5 仏 L In the manufacture of crimped composite fibers, 1369 Ϊ, a polyparameter (Mn) of a molecular weight distribution index (PDI) of 2.2 was used as an ester, and the number average molecular weight (Μη) was 25,984. -Polyethylene terephthalate 4 of 夂 2.2, whose melt-spinning equipment is "^ 5 cloth index ⑽", ㈣-⑷ partial: sheath 5, using the existing fixed spinning temperature as mt; The speed is 2 600 &quot; / i cross section, the retention time is 4 minutes, and the monofilament fineness is 69 deniers. 2 pieces of internal lagging dimension. Using other drawing devices will be passed through the spinning / Λ Sa composite fiber The fiber is stretched to produce a composite coil that gives a spring-shaped curl to obtain the second compound :: work fineness when buying ^ when stretched ^ • stretched, the degree of dish is 90 ° C, and the heat-fixing temperature is 丨 60. Qualitative characteristics &amp; characteristics and morphological stability Example 6 In the production of crimped composite fibers, the measurement 5, molecular weight distribution index (?)) 1) is 2 = sub (Μη) is ... polyethylene terephthalate, its weight: the second cloth index T is αυ · 4, using the existing 200532061 V. Description of the invention (18) = melt composite spinning equipment, as shown in Figure 2_ (b) The cross section of the parallel type was set at a spinning temperature of 295 t :, a spinning speed of 2400 m / min, and a residence time in the module of 4 minutes to produce a polyester composite fiber with a monofilament fineness of 3.4 denier. = The composite fiber obtained through the spinning / winding is loaded with another drawing device_loading &amp; crimp type stretchable composite fiber with spring shape crimp X, the single-filament fineness is 2.1 denier. The draw ratio was 162, Ϊ, and the heat-fixing temperature was 22 ° C. The results are shown in Table 1. The raw silk ^ fabric exhibited excellent stretching properties and morphological stability. Example 7 In the manufacture of crimped composite fibers Using isophthalic acid with a number-average molecular weight (m Λ λ, λ number (PDI) of 2.2 Z 2 was obtained by isophthalic acid 100 ^ vinegar, and its weight ratio is substituted dimerization The side-by-side determination of ethylene dibenzate is shown in Fig. 2-… ... See the silk equipment, ◦m / min, when staying in the module It is a polyester composite fiber of 3.4 denier. The early use of the composite fiber obtained by the spinning / winding is drawn = a curled elastic composite fiber spring with a shape of a curl. The stretching ratio is 167, the temperature is 2 # 1, the temperature is 180 ° C, and the fruit is shown in Table 1. The store temperature is 90 ° C, and the heat shrinkage characteristics are different, and the shape and qualitative properties are very high. Excellent (Example 8) In the production of crimped composite fibers, the number average molecular weight (Mn) was used.

EH ^ HI 200532061 V. Description of the invention (19) 1 5385, Polyterephthalate with a molecular weight distribution index (PDI) of 2.2 and a number average molecular weight (Μη) of 3369 1. Molecular weight distribution refers to ^ -2. The weight ratio of polybutylene terephthalate of 2 is 5: 5. Using the existing melt composite spinning equipment, with the side-by-side cross-section of Fig. 2- (a), the temperature of the filament is 275. ° C, spinning speed of 2400 m / min. It takes 4 minutes to produce a polyester composite fiber with a monofilament fineness of 3.4 denier: It is passed through the spinning with other drawing 1 丹尼尔。 Stretched to receive the complex] stretch 'manufactured crimp-type stretchable human fiber fiber with spring shape crimping' its monofilament fineness is 2.1 denier. The stretching ratio at the time of stretching is: the stretching temperature is 90 ° C, and the heat-fixing temperature is 180 °. 1 girl comparative example 1 m32 is used in the production of Vol. 8 compound Λ compound // Λ, using a number average molecular weight ( _ Is a melted compound rayon of polyethylene terephthalate 2MΛν / ΛΓ ^ 16! 50 'with a H knife (PDI) of 2.2: prepare a known' its weight ratio is 5: 5. Based on the side-by-side type shown in Figure 2- (a), other spinning devices used for spinning are set to pass = 2 / Seoul roll: wide fiber. It is stretched and manufactured, and the composite fiber obtained by π male winding is rolled up earlier. Dimensions are fine; ^ f-shaped curled stretchable composite fiber drawing temperature rail ", Er. The drawing ratio when drawing is 1.70, indicating that in the original silk and fabric ;: The results The results are shown in Table 2. Month, month, month, month, month, month, month, month, month, month, month, month, month, month, month, month, month, month, month, month, month, month, month, year, month, month, month, month, month, month, month, month, month, month, month, month, month, month, month and month and month. (M, 69 Bu poly (p-phenylene terephthalate) with a molecular weight denier distribution index (PDI) of 22 is ethylene glycol, and the number average molecular weight (Mn) is 244JJ, and Baden is 2.7 , Its melting compound spinning equipment with a weight of 2 li · blade blind number (PDi) is shown in Fig. 2-⑷: Xyler uses the existing Hachijo spinning temperature of 265 ° C and the spinning speed of 15 ° ~ cross section It is assumed that the 砗 H AS 八 制 4 抑 # is the hysteresis in the 500-per-minute module! 甘 The polyester composite fiber with a degree of 6.0 denier. Using other drawing devices will pass the fiber Stretching, manufacturing the composite fiber obtained by coiling with a shape such as a bomb, and the like: ϋ r roll of a crimped stretchable compound mouth ^ the fineness of the early filament is 2. Daniel. When stretching =, stretching temperature It is 75t, and the heat-fixing temperature is "π dry stability = 2." It shows that there is some reduction in the stretch properties of the raw silk and the fabric (Comparative Example 3) 1 The use of the number average molecular weight Uro in m is the purpose and number average The molecular weight (Mn) is 3068. The molecular f = ^ a k k 2-6 poly-terephthalate knife cloth number of days (PDI) is shown in Figure 2 of the composite spinning equipment is 5: 5 'Using existing: 8 points' to make a monofilament with a fineness of 8.1 denier; m using other stretching vibrations will pass the spinning /: take = = = 200532061 V. Invention Ming (21), :: The t-shaped endowment gave the shape of the impeachment, and its monofilament fineness was 2.8 dagger. The drawing temperature was 8Gt, and the thermosetting temperature was $. The elongation ratio is 2.90, indicating that there are some reductions in the stretch properties of the raw silk and the fabric, which are shown in Table 2. (Comparative Example 4) Heart instability in the manufacture of crimped composite fibers ~ Use poly-p-phenylene with a number-average molecular weight (Μη) of Qiao385, Litian knife cloth index (PDI) of 22, and a number-average molecular unit (Μη) of 31292, and a molecule of 2 R. The thousand-mile knife cloth index (PD I) is == 5 spinning.丝, Figure 2-7) side-by-side cross-section, set spinning ΪⅡ "L:,: ίΓΪ is 14 ° 0 m / minute, the residence time in the module ^ knife, the fineness of the early filament is 6. 〇 丹尼 用Other drawing devices will pass through the spinning / winding. Synthetic fiber Elastic yellow shape curling type expansion and contraction: composite fiber = / as early as 4 ,,, the degree is 2.1 denier. The stretching ratio at the time of stretching was 2,90, the stretching temperature was 75T, and the heat-fixing temperature was 145t. The results are shown in Table 2. It shows that the stretch characteristics of the raw silk and fabric are slightly reduced, and the morphology (Comparative Example 5) "In the production of crimped composite fibers, a nylon having a number average molecular weight (Mn 1 3490 and a molecular weight distribution index (PDI) of 2.2" was used 6 and number average score; poly (p-phenylene terephthalate) S with a quantity (Μη) of 3 1 290 and a molecular weight distribution index (? 1) 1) of 28. Its reset ratio is 5: 5. The composite spinning equipment is manufactured with a side-by-side cross section as shown in Fig. 2- (a), the spinning temperature is set to 27 °, the spinning speed is 1,400 m / min, and the residence time in the module is 8 minutes.

200532061

= Polyamide / polyester composite fiber with a silk fineness of 6.0 denier. The composite fiber obtained by the spinning and winding is stretched by using other = stretching equipment f to produce a crimped composite fiber having a spring-shaped curl, and the monofilament is thin Λ; 2 · 1 / Niel. The stretching ratio during stretching is &quot; 0, and the stretching temperature is i45t: the temperature in the fabric is shown in Table 2. The results are shown in Table 2. It shows that the characteristics of the protofilament and oolitic are reduced, and the shape is unstable. 200532061 V. Description of the invention (23) Li 8 Ρ1ΤΤ (15385) PBT (33691) 2.2 / 2.2! Inch 275 2400 5 1 § g 160 Ο ΓΊ CC Example 7 ΡΙΤ (15385) CO-PITΓ (23300) 2.2 / 2.2 inch 275 2900 00 5 § § σ \ rn o CN (NW Example 6? EV (15385) Ρ1ΓΓ (31300) 2.2 / 2.1 υη Ο CN 2400 00 oc 1.62 g 220 oo Ο rn 〇 (^ 1 &lt; EW Example 5 ΡΓ: Τ (13691) VET (25984) 2.2 / 2.2 m oo Γ \ 2600 s / c 1.70 Ο § 170 Ο Cn i W Example 4 ΡΒΤ (12632) ΡΓΓ (25984) 2.2 / 2.2 inch 285 2600 00 1.70 § 160卜 ο oo vr ^ CO Signature—ΐ 丽 了 — ΡΓ: Τ (18211) ΡΊΤ (88245) 2.1 / 1.6 inch 285 3800 00 3.70 § o — fN g r4 &lt; Ε Goods example 2 PET (15385) ΡΤΤ ( 33522) 5 mm inch 275 2600 00 00 1.70 gg Ό ΙΟ CN un ri Qualified goods Example 1 Ρ1Τ (12632) ΡΓΓ (19149) 2.2 / 2.4 inch 270 2200 s / c 1.75 * r &gt; oo 160 OO wo ο Η 00 CO O rj Polymer Λ (Μη) Pulp B (Mw) PDI (A / B) Retention time in the module (minutes) Spinning temperature (t :) Spinning speed (m / min. M) Section shape &quot; 1 Stretch specific temperature (° c) heat Fixed temperature (t :) The highest temperature of thermal stress 0C) Crimp diameter (mni) Crimp rate (%) Elastic recovery rate (%) Ironing shrinkage (%) Is the ironing shrinkage acceptable? ^ Οτ- rls 驰 _ 「、: f * £ ^ &lt; lnKn'li: i: lw &gt; lrM? iG to 鍟 2; i], ·: o / s, to mound: s / s II.30th page 200532061 V. Description of the invention (24) Table 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Polymer A (Mn) PET PET PET PET Nylon 6 (12632) (12691) (15805) (15385) (13490) Polymerization B (Mw) PTT PTT PET PBT PTT (16950) (24411) (30680) (31292) (31290) PDI (A7B) 2.2 / 2.4 2.2 / 2.7 2.6 / 2.6 2.2 / 2.8 2.2 / 2.8 Retention time in the module 4 8 8 8 8 Spinning temperature (° C) 270 265 270 275 270 Spinning speed (m / min) 2500 1500 1400 1400 1400 Sectional shape υ S / S s / c S / SS / SS / S Stretch ratio 1.70 1 2.85 2.90 2.90 2.90 Pulling temperature (° c) 75 75 80 75 75 Heat fixing temperature (° c) 145 140 150 145 145 Maximum temperature of thermal stress (° c) 139 132 148 135 137 Coil diameter (mm)-10.0 12.0 12.0 12.0 Curl elongation (%) 23 36 39 32 38 Elastic recovery rate (%) 68 70 67 66 69 Iron shrinkage rate (%) 3.5 4.0 3.7 1 3.9 1 4,2 Whether ironing shrinkage rate is acceptable 2) Unqualified Unqualified Unqualified Unqualified

nS / S side-by-side type, S / C: eccentric core-sheath type 2) Whether the standard of ironing shrinkage is acceptable: less than or equal to ± 3.0%

Page 31 200532061 Brief description of the drawings [Simplified description of the drawings] FIG. 1 is a thermal shrinkage stress analysis chart of a crimped composite fiber excellent in stretchability and morphological stability during post-processing used in the present invention. Figs. 2 (a) to (d) are cross-sectional views of crimped composite fibers having excellent stretchability and morphological stability during post-processing produced according to the present invention.

Page 32

Claims (1)

200532061 Page 33, 200532061 VI. Scope of patent application (A) Two types of polyesters are melted, one of which is poly (p-xylylene) terephthalate, and the diester has a number average molecular weight of 1 000 0 to 2 0 〇〇〇, Eight-bladed eight-bodied acetic acid slicing knife ^^ refers to gold tincture from 1.5 to 2.5; another polymer is polytrimethylene terephthalate, and the molecular weight is 1 500 0 ~ 9 0 0 0 0, the molecular weight distribution index is 丨. 5 ~ 2,5. Number average (B) Pass the melt through the spinning module, and control its residence time in the spinning module to be less than or equal to 5 minutes, and then take 2 2000 ~ 500m / eight / spinning speed to collect, ^ $ silk into side-by-side or eccentric core type; let B (C) will collect the composite yarn at 8 5 ~ 9 5 ° It is stretched at a temperature of C and heat-fixed at a temperature of ~ 220 ° C. 160 7 · A method for manufacturing a composite fiber, comprising the following steps: (A) melting two polyesters, one of which is a polyterephthalate and having a number average molecular weight of 1 0 0 0 0 to 20 0 0 0 ， Molecular weight distribution refers to "number of ethylene 1 · 5 ~ 2 · 5; another polymer is polyethylene terephthalate, polypara, butylene diacetate or polyterephthalate Ethylene oxalate copolymer, the number of which is equal to 15,000 ~ 90,000, and the molecular weight distribution index is 丨. 5 ~ 2.5; (B) passing the dazzling melt through the spinning component, and controlling it in the spinning component The residence time is less than or equal to 5 minutes, and then collected at a spinning speed of 2200 to 5000 m / min, and collected into a side-by-side or eccentric core-sheath composite yarn; The filaments were stretched at a temperature of 8 5 to 9 5 ° C and heat-fixed at a temperature of 160 to 220 ° C. 8. The method for manufacturing a composite fiber according to item 6 or 7 of the scope of application for a patent, characterized in that it is directly drawn through a partially oriented drawing / false twist process or spinning Page 34 200532061 Manufacturing process. 9 · A type of processed yarn, characterized in that it is made of the stretched and composite fiber described in item 1 of the scope of patent application, and the twist number is from 150 to 2000. 1 ·· A mixed fiber filament, which is a mixture of the stretchable composite fiber described in the first item of the patent application scope and a high-shrinkage raw yarn with a stretch degree of 50% or more and a boiling water shrinkage of 15% or more. Filaments. A fabric characterized by containing the stretchable composite fiber described in the first item of the patent application scope.