TW202124800A - Polyester multifilament blended yarn, fabric, method for manufacturing polyester multifilament blended yarn, and method for manufacturing fabric - Google Patents

Abstract

Provided is a polyester multifilament blended yarn that can exhibit a sense of bulkiness and softness like that of natural fibers. Also provided are a fabric, a method for manufacturing the polyester multifilament blended yarn, and a method for manufacturing the fabric. In a polyester multifilament blended yarn 1 obtained by interlacing at least two types of polyester multifilament yarns having different thermal shrinkage rates, the two types of polyester multifilament yarns include a false-twisted yarn 10 and a partially-drawn yarn 20, and both yarns are subjected to dry thermal shrinkage. Although large shrinkage occurs overall through thermal shrinkage, locations with different shrinkage amounts are mixedly present on a localized manner, and both yarns are unevenly exposed to the outside. Unevenness in the dyeing degree attributed to the differences in the shrinkage amounts in the longitudinal direction of the blended yarn, and unevenness in the dyeing degree attributed to differences in the degrees of orientation of both yarns are combined, and thereby a sense of uneven rippling is formed in the longitudinal direction of the blended yarn after dyeing, and color tones and textures like those of natural fibers are exhibited in the fabric.

Description

Polyester multifilament mixed fiber yarn, fabric silk, polyester multifilament mixed fiber yarn manufacturing method and fabric manufacturing method

The present invention relates to a method for producing a polyester multifilament blended yarn, a fabric, and a polyester multifilament blended yarn, and a fabric manufacturing method that can exhibit the swelling or softness like natural fibers.

Generally speaking, the spinning of long synthetic fibers is melt spinning using polyethylene terephthalate (PET) as the raw material. The yarn produced in the spinning step is divided into stretched yarn (or aligned yarn, Fully Drawn Yarn: FDY), partially stretched yarn (or partially distributed yarn, Partially Oriented Yarn: POY) according to different drawing speeds or extensions, etc. Undrawn Yarn (UDY). In the spinning step, the stretched yarn and part of the stretched yarn are extruded from a spinning port with a plurality of fine holes in PET, cooled by a cooler to form a plurality of filaments, and are drawn by a plurality of rollers. A number of filaments are waited and stretched while being wound by a winder to form a single yarn called a multifilament.

The stretch yarn system fully stretches the filaments, but some stretch yarns only stretch to the extent that the filament properties are stable. The so-called "filament property stability" refers to a state that is stable to the extent that the physical properties of the yarn do not change (the yarn is not stretched or deformed) under weak external force applied during transportation or environmental changes. The stretched yarn is stretched and heat-treated in the spinning step to make the filament properties sufficiently stable, so it can be directly used for weaving or knitting. Partially stretched yarns are used after the filament properties are changed by processing after spinning. The unstretched yarn is a yarn that is formed without being stretched in the spinning step. Like the partially stretched yarn, it is used after the filament properties are changed by processing after spinning. As a method of obtaining a false-twisted yarn by processing after spinning, there is a method of forming a false-twisted yarn (Textured Yarn: TY) by false-twisting the stretched yarn, and by partially The stretched yarn is subjected to a stretched false twisting process to form a stretched/false twisted processed yarn (Draw Textured Yarn: DTY).

The false-twisted polyester yarn obtained by false-twisting the long polyester fiber is bulky and has excellent crimping properties, and can exhibit a texture and color similar to natural fibers. As technologies for improving the texture of polyester false twisted yarns, etc., a profiled cross-section technology, a different shrinkage blending technology, a different fineness blending technology, etc. are known. For example, Patent Document 1 discloses the following technology: the elongation and heater temperature when the first yarn composed of multifilament yarn is false-twisted and the elongation when the second yarn composed of multifilament yarn is false-twisted The temperature of the heater and the heater are set to different values, and the first yarn and the second yarn are combined after the false twist processing to produce a special false twist processed yarn. Because of the difference in the degree of stretch or crimp of each yarn, uneven spots can be shown in the longitudinal direction, so even when dyed in the same color, it can be dyed into an uneven and natural dynamic color tone. Patent Document 2 discloses a mixed fiber yarn, which is formed by intertwining at least two kinds of filaments, for example, a filament composed of polytrimethylene terephthalate (PTT) without false twist crimp And the filament composed of polyester with false twist crimp. Compared with polyester, polytrimethylene terephthalate has the characteristics of soft texture and high stretchability. By blending with polyester false twisted yarn, it can give looseness, soft texture and stretchability. sex. Patent Document 3 discloses a mixed fiber yarn, which contains a polyester multifilament false twisted processed yarn and a polyester multifilament yarn (stretched yarn) that does not have false twist crimping, and the boiling water shrinkage rate of the latter is higher than that of the former. The shrinkage rate is more than 5%. The false twisted yarn exhibits a state in which each filament has a crimp and is arranged non-parallel in a small section. By blending the false twisted yarn with the stretched yarn with high boiling water shrinkage rate, the false twisted processed yarn is made into the sheath yarn of the mixed fiber yarn, and the stretched yarn is made the core yarn, and the difference caused by the thermal history during dyeing processing is utilized. The shrinkage effect makes the crimped filaments protrude on the surface of the mixed fiber yarn, so a delicate and soft touch can be obtained. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] JP 2016-216869 A [Patent Document 2] JP 2002-20936 A [Patent Document 3] Japanese Patent Laid-Open No. 7-102436

[The problem to be solved by the invention]

However, the technique of the above-mentioned patent document has the following problems. The techniques of Patent Documents 1 and 2 have a problem in that the texture is limited to the same as that of the false twisted yarn, and the swelling or softness peculiar to natural fibers cannot be fully expressed. Patent Document 3 has a problem in that the stretched yarn enters into the yarn as a core yarn and is not easily observed from the outside, and therefore cannot express the unevenness of the longitudinal direction of the natural fiber. In addition, although the false twisted yarn is bulged outward to give a softer touch, it cannot express the swelling or softness like natural fibers.

The present invention takes the above-mentioned problems into consideration, and the subject is to provide a method for producing a polyester multifilament blended yarn, a fabric, and a polyester multifilament blended yarn that can exhibit swelling or softness like natural fibers, and the fabric Manufacturing method. [Technical means to solve the problem]

The polyester multifilament blended yarn of the present invention is a polyester multifilament blended yarn formed by intertwining at least two types of polyester multifilament yarns with different heat shrinkage rates, characterized in that the two types of polyester multifilament yarns are The false twisted processed yarn and the partially stretched yarn, and the false twisted processed yarn and the partially stretched yarn are dry heat-shrinkable. The fabric of the present invention is characterized by containing the above-mentioned polyester multifilament mixed fiber yarn. The manufacturing method of the polyester multifilament mixed fiber yarn of the present invention is a method for manufacturing a polyester multifilament mixed fiber yarn formed by intertwining at least two types of polyester multifilament yarns with different heat shrinkage rates, and is characterized in that: the above two types The polyester multifilament yarn is a false twisted processed yarn and a partially stretched yarn, and the method for manufacturing the above-mentioned polyester multifilament mixed fiber yarn includes the following steps: intertwining the false twisted processed yarn with the partially stretched yarn; The false-twisted processed yarn and the partially stretched yarn are heat-treated by dry heat of a heater. In addition, the method for producing the polyester multifilament mixed fiber yarn is characterized in that the temperature of the false twisted yarn and the partially stretched yarn immediately after exiting the heater outlet when the heat treatment by dry heat is performed is 130°C above. The fabric manufacturing method of the present invention is a fabric manufacturing method using a polyester multifilament mixed fiber yarn formed by intertwining at least two polyester multifilament yarns with different heat shrinkage rates, and is characterized in that: the above two types of polyester The multifilament yarn is a false twisted processed yarn and a partially stretched yarn, and the manufacturing method of the fabric includes the steps of: intertwining the false twisted processed yarn with the partially stretched yarn; and interlacing the false twisted processed yarn with the portion The stretched yarn is subjected to heat treatment by using the dry heat of a heater to obtain a polyester multifilament mixed fiber yarn; and the above polyester multifilament mixed fiber yarn is processed into a knitted fabric. Furthermore, the method for manufacturing the fabric is characterized in that the temperature of the false twisted yarn and the partially stretched yarn immediately after exiting the heater outlet when the heat treatment by dry heat is performed is 130°C or higher. [Effects of Invention]

Although the polyester multifilament mixed fiber yarn of the present invention shrinks greatly as a whole due to heat shrinkage, parts with different shrinkage amounts are mixed locally, and the partially stretched yarn and the false twisted yarn are exposed to the outside unevenly. In addition, in the partially stretched yarn, the heat generated by dry heat is not easy to reach the part with a large degree of entanglement, and the heat generated by dry heat easily reaches the part with a small degree of entanglement, so there is a heat history mixed in the longitudinal direction. The state of different parts. If the mixed fiber yarn after heat treatment with dry heat is processed into fabric and dyed, part of the stretched yarn shrinks in boiling water and shrinks as a whole, but the shrinkage is relatively large according to the difference in thermal history. The small part. In addition, partially stretched yarns are easy to dye due to low orientation and many non-crystalline parts, and false twisted yarns are difficult to dye due to high orientation and few non-crystalline parts. In this way, the unevenness of the degree of dyeing caused by the difference in the amount of shrinkage in the longitudinal direction of the mixed fiber yarn and the unevenness of the degree of dyeing caused by the difference in the orientation of the partially stretched yarn and the false twisted yarn In combination, the mixed fiber yarn after dyeing forms uneven variegated color in the long side direction, which can make the fabric show the color tone or texture like natural fiber. In addition, if the temperature of the false twisted yarn and the partially stretched yarn immediately after exiting the heater outlet during the heat treatment by dry heat is set to 130°C or higher, the surface of the yarn will begin to change and a subtle variegated color will begin to appear. , As it reaches 140℃ or higher, it becomes fuzzy flowing variegated color, which can show the tone or texture like natural fiber more. In addition, as the temperature reaches 140°C or higher, the swelling of the fabric increases, and the swelling feeling or softness like natural fibers can be more expressed.

The embodiment of the polyester multifilament mixed fiber yarn of the present invention will be described. In addition, in the following description, the polyester multifilament mixed fiber yarn is sometimes referred to as "mixed fiber yarn" for short. Mixed fiber yarns are made of at least two types of polyester multifilament yarns with different heat shrinkage rates. As shown in Figure 1, one type of polyester multifilament yarn is false twisted yarn 10, and the other type is polyester multifilament yarn. The yarn is a partially extended yarn 20. The details will be described below. The false twisted processed yarn 10 and the partially stretched yarn 20 are subjected to dry heat treatment after being entangled to shrink into the mixed fiber yarn 1.

As shown in the step diagram of false twist processing in Figure 2, the false twist processed yarn (Textured Yarn: TY) is a false twisted yarn (Fully Drawn Yarn: FDY) formed by stretching the undrawn yarn (Undrawn Yarn: UDY). Twisted and processed. False-twisting is to temporarily fix the twisted state (heat fixation) by applying heat while twisting into a stretched yarn, and then untwist. The false-twisted processed yarn can be either S-twisted false-twisted processed yarn or Z-twisted false-twisted processed yarn, or it can be a combination of S-twisted false twisted processed yarn and Z-twisted false twisted processed yarn. Torque false twist processing yarn. The false-twisted yarn 10 used in the mixed fiber yarn of the present invention may also be a false-twisted yarn obtained by false-twisting a stretched yarn, and a partially stretched yarn (Partially Oriented Yarn: POY). Either stretched/false-twisted yarn (Draw Textured Yarn: DTY) made by twisting.

As described above, the partially stretched yarn 20 is a yarn that stretches only to the extent that the filament properties are stable during melt spinning, and its properties vary greatly due to processing after spinning.

Next, the manufacturing method of the polyester multifilament mixed fiber yarn 1 is demonstrated. First, as shown in Figs. 3(a) and (b), the false twisted processed yarn 10 and the partially stretched yarn 20 are entangled. As the order of entanglement, for example, the following method can be cited: as shown in Figure 4 (a), by passing the stretched yarn 30 drawn from a yarn feeding package 100 through a roller 101, a false twist heater 102, and a false twist member 103 The traction roller 104 performs false twist processing to form a false twist processed yarn 10. At the same time, a part of the extended yarn 20 is drawn from another yarn feeding package 105, and the compressed air sprayed from the self-interlacing nozzle 106 is used to make the two yarns 10 , 20 entangled. In addition, for example, the following method can be cited: as shown in Figure 4 (b), the false twisted yarn 10 is manufactured in another step in advance, stored in the yarn supply package 107, and drawn from the yarn supply package 107 by the entanglement nozzle 106 The false-twisted processed yarn 10 is intertwined with the partially stretched yarn 20 drawn from another yarn supply package 108. The filaments of the false twisted processed yarn 10 and the partially stretched yarn 20 are complicatedly entangled with each other by blowing compressed air. Next, by using a well-known heater 109, the entangled false-twisted processed yarn 10 and the partially drawn yarn 20 are subjected to a heat treatment by dry heat to shrink them by dry heat. Compared with boiling water, dry heat can expand the temperature range, so it has the advantage of easy adjustment of the thermal history of the yarn. The heat-treated mixed fiber yarn 1 is wound to the winding package 111 via the winding roller 110.

As described above, the false-twisted processed yarn 10 is heat-fixed, and the heat-fixing system is to temporarily fix the twisted state by applying heat while the stretched yarn 30 is twisted. Therefore, as shown in FIG. 5(a), even if the single false twisted yarn 10 is subjected to a heat treatment by dry heat, the false twisted yarn 10 hardly shrinks in the longitudinal direction and does not deform. On the other hand, the partially stretched yarn 20 only stretches to the extent that the filament properties are stable. Therefore, as shown in Fig. 5(b), when the individual partially stretched yarn 20 is subjected to a heat treatment by dry heat, the whole is greatly contracted in the longitudinal direction.

Fig. 6 shows a state in which a partially stretched yarn 20 is entangled with a false-twisted yarn 10 and is thermally shrunk by dry heat. Before heat shrinking, it has a core-sheath structure, that is, the partially stretched yarn 20 is a core yarn, the false twisted processed yarn 10 is a sheath yarn, and the part A with a relatively large degree of entanglement and the part B with a small degree are mixed. If heat treatment by dry heat is performed in this state, the following two effects will be produced. The first effect is the following effect: at the part A where the degree of entanglement is large, the thermal shrinkage of the partially stretched yarn 20 is hindered by the false twisted yarn 10 entangled around it, so the result is relatively little shrinkage (symbol A' Range), on the contrary, at the part B where the degree of entanglement is small, the thermal shrinkage of the partially stretched yarn 20 is not easily affected by the false twisted yarn 10 entangled around it, so it shrinks relatively greatly (the range of symbol B') . The second effect is the following effect: In the part A where the degree of entanglement is large, it is formed in a state in which the false twisted yarn 10 that becomes the sheath yarn is mostly exposed on the surface, and the part of the stretched yarn 20 that becomes the core yarn is false The twisted yarn 10 is hidden inside. Therefore, the heat generated by dry heat is not easy to reach the inner part of the stretched yarn 20, and as a result, it does not shrink much (the range of symbol A'). On the contrary, the part B where the degree of entanglement is small is the part of the stretched yarn that becomes the core yarn. In the state where a part of the yarn 20 is exposed to the outside, the heat generated by the dry heat easily reaches the partially stretched yarn 20, so the result is relatively large shrinkage (range of symbol B'). According to these two different shrinkage effects, compared with the part A with a relatively large degree of entanglement, the part B with a relatively small degree of entanglement shrinks greatly and the bulkiness is increased. Observing the mixed fiber yarn in the state after the heat treatment by dry heat is completed, it is in the following state, that is, there are many places where the entanglement is unraveled, and the core-sheath structure is not formed, and the partially stretched yarn 20 and false twist processing Both of the yarns 10 are unevenly exposed to the outside.

In this way, it becomes a state in which a single mixed fiber yarn 1 shrinks greatly as a whole, but parts with different shrinkage amounts are locally mixed, and furthermore, the partially stretched yarn 20 and the false twisted yarn 10 are unevenly exposed to the outside. In addition, as described above, the partially stretched yarn 20 is formed in a state that the heat generated by dry heat cannot easily reach the part A with a high degree of entanglement, and the heat generated by dry heat easily reaches the part B with a small degree of entanglement, and therefore heat shrinks. Later, there are mixed parts with different thermal histories in the longitudinal direction. If the mixed fiber yarn subjected to the heat treatment by dry heat is processed into a fabric and dyed, the partially stretched yarn 20 shrinks as a whole due to boiling water shrinkage, but according to the difference in heat history, relatively large shrinkage parts and small shrinkage parts will occur. The part of the ground contraction. In addition, the partially stretched yarn 20 is easy to dye due to low orientation and many non-crystalline parts, and the false twisted yarn 10 is difficult to dye due to high orientation and few non-crystalline parts. In this way, the unevenness of the degree of dyeing caused by the difference in the amount of shrinkage in the longitudinal direction of the mixed fiber yarn 1 and the degree of dyeing caused by the difference in the orientation degree of the partially stretched yarn 20 and the false twisted processed yarn 10 are compared The non-uniformity is combined to form a non-uniform variegated color in the long side direction of the mixed fiber yarn 1 after dyeing, which can make the fabric show the color tone or texture like natural fiber. In addition, it can make the fabric feel uneven and express the swelling or softness of natural fibers such as wool or cotton. As the fabric, in the case of either a woven fabric or a knitted fabric, it is preferably one with a thicker mesh. The reason for this is that the partially stretched yarn 20 tends to shrink (easy to move) when the mesh is thicker when it shrinks in boiling water, and therefore, the variegated feeling may be more unevenly generated. [Example]

In the fabric manufacturing method of the present invention, the temperature condition of the heater (2ND heater) during the heat treatment using dry heat is changed to study the degree of change of the fabric after dyeing. <Processing conditions> Raw yarn used: POY SD83d/36f Processed yarn: SD125d/72f Machine type: ATF1500 made by TMT Yarn speed: 600 m/min DR (draft): 1.690 Disc: 1-6-1 Twist direction: Z twist 1ST Heater temperature (2 zones): 400°C-250°C staggered pressure: 1.5 kg/cm ² staggered nozzle: Heberlein P212 nozzle OF (overfeed): 2% 2ND heater temperature: condition changes (350°C, 400°C, 450°C, 500°C) 2ND heater OF: 4% <Result> As shown in Fig. 7, it was confirmed that the dyed fabric formed an uneven variegated color and showed a natural fiber-like hue or texture. In addition, it was confirmed that unevenness was produced in the fabric, and the swelling feeling or softness like natural fibers such as wool or cotton was expressed. In particular, it can be confirmed that when the temperature of the 2ND heater is 350°C, the surface of the yarn begins to change and begins to show a subtle variegated color. As it reaches 400°C or higher, it becomes a fuzzy flowing variegated color, which is more like natural fiber. General tone or texture. In addition, it was confirmed that the swelling of the fabric increased as the temperature reached 400°C or higher, and the swelling feeling and softness like natural fibers were more exhibited. From the above, it can be seen that the temperature condition of the heater (2ND heater) when performing the heat treatment using dry heat is preferably 350°C or higher, and particularly preferably 400°C or higher. As for the upper limit, the temperature is preferably as high as possible in the range where the fabric does not cause defects such as melting. In this example, it can be confirmed that the temperature of the 2ND heater is 500°C, and the color tone, texture, swelling, or softness like natural fiber is also shown. There is a difference between the set temperature of the heater and the temperature of the yarn just after exiting the heater. After studying the setting temperature of the heater and the temperature of the yarn just after exiting the heater outlet under the above processing conditions, it was found that there is a corresponding relationship in Table 1 below. [Table 1] Set temperature of heater The temperature of the yarn just after exiting the heater outlet 300°C 115°C 350°C 130°C 400°C 140°C 450°C 150°C 500°C 160°C As described above, the setting temperature of the heater when performing the heat treatment by dry heat is preferably 350°C or higher, and particularly preferably 400°C or higher. Correspondingly, it can be seen that the temperature of the yarn immediately after exiting the heater outlet is preferably 130°C or higher, particularly preferably 140°C or higher. The temperature of the yarn just after exiting the heater outlet can be measured with an ordinary contact thermometer (for example, HD-1100K manufactured by Anritsu Meter Co., Ltd.). [Industrial availability]

The present invention is a method for producing polyester multifilament mixed yarn, fabric, and polyester multifilament mixed yarn, and fabric manufacturing method that can exhibit swelling or softness like natural fibers, and has industrial applicability. .

A: The part where the degree of entanglement is relatively large A': A's range after heat shrinkage B: The part where the degree of entanglement is relatively small B': B's range after heat shrinkage 1: Polyester multifilament mixed fiber yarn 10: False twist processed yarn 20: Partially stretched yarn 30: Stretch yarn 100: Yarn packaging 101: Roll 102: false twist heater 103: false twist 104: Traction roller 105: Yarn packaging 106: Entangling nozzle 107: Yarn packaging 108: Yarn packaging 109: heater 110: Winding roller 111: winding packaging

[Fig. 1] A diagram schematically showing the false twisted yarn and the partially stretched yarn before being entangled. [Figure 2] is a step diagram of false twist processing. [Figure 3(a)] is a view before the false-twisted processed yarn and a partially stretched yarn are intertwined, and [FIG. 3(b)] is a view after the false-twisted processed yarn is entangled with a partially stretched yarn. [Fig. 4] A diagram conceptually showing a method of manufacturing a polyester multifilament mixed fiber yarn. [Figure 5(a)] is a diagram before and after heat treatment by dry heat is applied to a single false twisted yarn, [Fig. 5(b)] is a heat treatment performed by dry heat on a part of the single stretched yarn Picture before and after. [Figure 6] is a view before and after heat treatment by dry heat is performed in a state where the false twisted processed yarn and the partially stretched yarn are intertwined. [Fig. 7] is a photograph showing the dyed fabric of the example.

1: Polyester multifilament mixed fiber yarn

10: False twist processed yarn

20: Partially stretched yarn

30: Stretch yarn

100: Yarn packaging

101: Roll

102: false twist heater

103: false twist

104: Traction roller

105: Yarn packaging

106: Entangling nozzle

107: Yarn packaging

108: Yarn packaging

109: heater

110: Winding roller

111: winding packaging

Claims (6)

A polyester multifilament mixed fiber yarn, which is formed by intertwining at least two types of polyester multifilament yarns with different heat shrinkage rates, and is characterized in that: The two types of polyester multifilament yarns are false twisted processed yarns and partially stretched yarns. The false-twisted processed yarn and the partially stretched yarn are dry heat-shrinkable. A fabric containing the polyester multifilament mixed fiber yarn of claim 1. A manufacturing method of polyester multifilament mixed fiber yarn, which is a manufacturing method of polyester multifilament mixed fiber yarn formed by entanglement of at least two types of polyester multifilament yarns with different heat shrinkage rates, characterized in that: The two types of polyester multifilament yarns are false twisted processed yarns and partially stretched yarns. The manufacturing method of the polyester multifilament mixed fiber yarn has the following steps: Intertwining the false twisted processed yarn with the partially extended yarn; and The interlaced false twisted yarn and the partially stretched yarn are subjected to a heat treatment using dry heat of a heater. The method for manufacturing a polyester multifilament blended yarn of claim 3, wherein the temperature of the false twisted yarn and the partially stretched yarn immediately after exiting the heater outlet when the heat treatment by dry heat is performed is 130 ℃ above. A method for manufacturing a fabric, the fabric uses a polyester multifilament blended yarn formed by intertwining at least two types of polyester multifilament yarns with different heat shrinkage rates, and the feature of the fabric manufacturing method is: The two types of polyester multifilament yarns are false twisted processed yarns and partially stretched yarns. The fabric manufacturing method has the following steps: Intertwining the false twisted processed yarn with the partially extended yarn; Performing a heat treatment on the false twisted processed yarn and the partially stretched yarn after being entangled by the dry heat of a heater to obtain a polyester multifilament mixed fiber yarn; and The polyester multifilament mixed fiber yarn is processed into a knitted fabric. The fabric manufacturing method of claim 5, wherein the temperature of the false twisted yarn and the partially stretched yarn immediately after exiting the heater outlet when the heat treatment by dry heat is performed is 130°C or higher.

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