JPH032966B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention provides a method for producing a silk-like composite yarn having a multilayer structure, which is composed of a thermoplastic synthetic fiber multifilament yarn consisting of two or more types of filaments having different heat shrinkage rates, and a thermoplastic synthetic fiber multifilament false twisted crimped yarn. It is related to. Conventionally, many techniques for performing fluid disturbance processing on multifilament yarns and the like have been proposed. An example of this is fluid-treated non-crimped multifilament yarn containing a mixture of single yarns with different heat shrinkage rates,
Interlaced yarns of false twisted crimped multifilament yarns, etc. are disclosed. In the above-mentioned conventional technology, for example, the yarn obtained by fluid treatment of non-crimped multifilament yarn with different heat shrinkage rates does not have crimpability, so it has poor compressive elasticity and bulge in the yarn radial direction, resulting in poor product texture. It is impossible to get out of the filament-like realm. In addition, in the case of interlaced yarns of false-twisted crimped yarns, the opening properties are low due to the effect of single yarn crimp, so the entangling properties by fluid treatment are poor, and the form and texture of the crimped yarns do not match the product texture. It has a crimped yarn-like texture with a strong loose feel. The purpose of the present invention is to provide a method for producing a silk-like composite yarn suitable for obtaining a knitted fabric with silk-like glitter and warm spun-like texture, which cannot be obtained by the conventionally known methods as described above. It has the following configuration. That is, the present invention provides a thermoplastic synthetic fiber multifilament non-crimped yarn consisting of at least two groups of single yarns having different heat shrinkage rates, and in which the difference in heat shrinkage rates between the single yarn groups satisfies the following formula (2). A and a high-torque false-twisted crimped yarn B obtained by false-twisting a special thermoplastic synthetic fiber multifilament with a false-twisting number that satisfies the following formula (1) are simultaneously supplied to the fluid treatment area to cause fluid disturbance. A method of processing, wherein the supercharging rate FA of the yarn A and the supercharging rate FB of the yarn B are FA-FB>5% and 5%<FA≦
The gist of the present invention is to provide a method for producing a silk-like composite yarn, which is characterized in that the relationship of 15% is satisfied and at least loops and slacks are generated in the yarn A. However, T: Number of false twists (T/M) D: Fineness (denier) F ₁ - _{F 2} ≧3% ... (2) However, F ₁ : Maximum heat shrinkage rate among the single yarn group F ₂ : Single yarn group As mentioned above, the present invention has a difference in heat shrinkage rate between two
Thermoplastic synthetic fiber multifilament non-crimped yarn A consisting of more than one single yarn group and false twisted crimped thermoplastic synthetic fiber multifilament yarn B are simultaneously subjected to fluid agitation treatment to form crimped yarn B. A composite yarn having a core-sheath structure in which non-crimped filament yarns A are arranged in a core part and a sheath part is obtained. That is,
By increasing the supercharging rate to the fluid treatment area by more than 5% for yarn A than for yarn B, the amount of slack of yarn A with a high supercharging rate increases, and yarn A is A core-sheath composite yarn can be effectively obtained. If there is no difference in the supercharging rate to the fluid treatment area between yarn A and yarn B, yarn B, that is, crimped yarn, has poor opening properties; The yarn B is inferior in entangling property to curly filament yarn.
does not form a core, and rather the threads A, which have good intertwining properties, are densely packed in the core. Furthermore, when it is made into a cloth, since there are no non-crimped yarns on its surface, silk-like glitter cannot be obtained. In other words, false twisted crimped yarn has a lower thermal shrinkage rate than non-crimped yarn, so it stands out on the surface of the fabric during the heat treatment during the dyeing process. ,
This results in the crimped yarn's unique texture, and the texture does not feel like silk. Next, in the method of the present invention, the yarn A occupying the sheath portion is
It is necessary to create an appropriate amount of loops and slack in the yarn, and for this purpose, the supercharging rate must be selected appropriately depending on the fineness of the yarn, the number of single yarns, the cross-sectional shape, and the performance of the fluid nozzle. It is preferable to set it to 15%. If the supercharging rate is less than 5%, sagging of single yarns occurs in many cases, but loops do not occur, and only so-called interlace-like entanglement of single yarns is obtained. In the method of the invention,
As loops and sag occur in the sheath, the filament-like roughness and stiffness of the product and the metallic luster disappear, resulting in a warm texture and subdued shine. On the other hand, when the supercharging rate exceeds 15%, the amount of loops formed increases, so the spun-like properties are overemphasized, which not only deviates from the silk-like texture and appearance, but also deteriorates the disintegration of the yarn. This is undesirable because the operability in the yarn twisting or weaving and weaving process deteriorates. Furthermore, by using a multi-filament in which at least two types of single yarns with different heat shrinkage rates are mixed together as the yarn A that occupies the sheath, a group of high-shrinkage filaments and a group of low-shrinkage filaments are created by the heat-receiving action in the dyeing and finishing process. As a result of the difference in thermal shrinkage occurring between the filament groups, the low shrinkage filament group forms on the outer peripheral surface of the sheath yarn.
The structure changes to a structure in which high shrinkage filament groups are respectively arranged on the inner surface. Therefore, the composite yarn according to the present invention substantially forms a three-layer structure with the high and low shrinkage filament groups and the crimped yarn, and the entire filament group occupying the sheath part is heated. By shrinking, the yarn B that forms the core is tightened in the yarn diameter direction, and the degree of entanglement is also improved, resulting in excellent performance in terms of physical properties such as morphological stability, stretch recovery, and compressive elasticity. It will demonstrate the In addition, since the crimp characteristic of the yarn B in the core is suppressed by the tightening action of the filament group in the sheath, a silk spun formulation with tension and elasticity can be achieved without giving the product a loose feel. . Furthermore, as mentioned above, due to the heat received in the dyeing and finishing process, a difference in heat shrinkage occurs in the differentially contracted filaments of the sheath yarn A, which improves the entanglement between the differentially contracted filaments and improves the shape of loops and sag. It is possible to obtain a woven or knitted fabric product which not only promotes elasticity but also has silk-like luster and a soft, silky feel due to different contraction effects. In the present invention, the false twisted crimped yarn B has the following (1)
It is necessary to perform false twisting with a number of false twists that satisfy the formula, and thereby the effects of the present invention can be significantly improved. However, T: number of false twists (T/M) D: fineness (denier) In other words, the number of false twists obtained by the above formula (1) is the commonly used number of false twists, the limit point for the generation of double twists. This means that the false twist number is 85% or less for a similar false twist number, and the resulting false twisted crimped yarn has coarse single yarn crimps and strong torque properties, so it is difficult to open the fibers between single yarns. It has much better properties than normal false twisted crimped yarn. Therefore, the entanglement caused by the fluid disturbance treatment is improved, and a more preferable core-sheath morphology can be obtained. In addition, the crimped yarn B having a small number of false twists has a low degree of deformation of the fiber cross-sectional shape during the false twisting process,
Since it is possible to maintain gloss similar to that of the non-crimped filament yarn A of the sheath yarn, the silk-like luster of the yarn as a whole is not inhibited. Furthermore, at least two
If the heat shrinkage rate difference between the single yarn groups constituting the thermoplastic synthetic fiber multifilament non-rolled yarn A consisting of single yarn groups of seeds satisfies the following formula (2), the heat reception during dyeing and finishing of woven and knitted materials As explained above, the degree of entanglement between the single yarns of the sheath yarns is improved, and the product has a more desirable silk-like luster or soft, silky feel. Can be done. F ₁ −F ₂ ≧3% ... (2) However, F ₁ : Maximum heat shrinkage rate among the constituent single yarns F ₂ : Minimum heat shrinkage rate In addition, in the present invention, the above heat shrinkage rate is used as yarn A. In addition to thermoplastic synthetic fiber multifilament yarns consisting of two or more types of single yarn groups having differences, the objective can also be achieved by using a combination of two or more multifilament yarns having different heat shrinkage rates. Next, one embodiment of the present invention will be described based on the drawings. In FIG. 1, a thermoplastic synthetic fiber multifilament Y ₁ is supplied by a yarn feeding roller 1 to a false twisting processing area consisting of a heater 2, a preliminary combustion spindle 3, and a take-off roller 4, and the above-mentioned limit point of double twist generation is reached. A false twisting process is performed with a false twist number of 85% or less of the false twist number close to , to form a low crimp false twisted yarn B, which is sent to the fluid agitation nozzle 5 at a constant supercharging rate. At the same time, a non-crimped multifilament _Y2 consisting of two or more types of single yarns having different heat shrinkage rates is used as yarn A, and the supercharging rate of low-crimped false twisted yarn B is increased by supply roller 1'. The silk-like composite yarn Y is obtained by supplying it to the fluid agitation nozzle 5 at a constant supercharging rate of 5% or more and taking it off with the delivery roller 6. Figure 2 shows an embodiment in which two types of thermoplastic multifilament drawn yarns with different heat shrinkage rates are used as thread A, and yarns Y ₄ and Y ₅ with different heat shrinkage rates are used at the same time. , yarn B from supply roller 1'
The supercharging rate is supplied to the fluid disturbance nozzle 6 at a supercharging rate that is 5% or more higher than the supercharging rate. Hereinafter, the present invention will be specifically explained with reference to Examples. Example 1 Processing was carried out according to the processing steps shown in FIG. 1 under the conditions shown in Table 1.

[Table] In the composite yarn obtained above, a group of single yarns of the low-stretch, low-crimp false twisted yarn B are densely intertwined in the core, and the sheath is non-woven to cover the core. The single yarns of yarn A of the crimped yarn formed loops and slacks, and all the single yarns were extremely finely intertwined to form a composite yarn. When the composite yarn was used in a woven or knitted product, a product was obtained that had a suitable volume and supple repulsion, and also had a fine silky feel and silk-like shine. Example 2 Preliminary work was carried out under the conditions shown in Table 2 according to the processing steps shown in FIG.

【table】

[Table] The composite yarn produced under the above conditions has countless loops and slacks in which the supply yarns Y ₄ and Y ₅ that make up yarn A are entangled in the sheath, and the low winding in the core. It has a clear core-sheath form covered with the curled false twisted yarn B, and has a subdued luster. When the composite yarn was knitted, woven, and dyed, a product was obtained that had a voluminous feel, a silky suppleness, and a silk-like shine.

[Brief explanation of the drawing]

FIGS. 1 and 2 are schematic process diagrams showing one embodiment of the present invention. 1, 1'... Supply roller, 2... Heater, 3
...False twisting spindle, 4...Take-up roller, 5...
...Fluid agitation nozzle, 6...Delivery roller.

Claims (1)

[Scope of Claims] 1. A thermoplastic synthetic fiber multifilament non-crimped yarn consisting of at least two groups of single yarns having different heat shrinkage rates, and where the difference in heat shrinkage rates between the single yarn groups satisfies the following formula (2). The string A and the strong torque false twisted crimped yarn B obtained by false twisting a special thermoplastic synthetic fiber multifilament with a number of false twists satisfying the following formula (1) are simultaneously supplied to the fluid treatment area. A method of performing disturbance treatment, wherein the supercharging rate FA of the yarn A and the supercharging rate FB of the yarn B are FA.
- A method for producing a silk-like composite yarn, characterized in that the relationships of FB>5% and 5%<FA≦15% are satisfied, and at least the yarn A has loops and slack. However, T: Number of false twists (T/M) D: Fineness (denier) F ₁ - _{F 2} ≧3% ... (2) However, F ₁ : Maximum heat shrinkage rate among the single yarn group F ₂ : Single yarn group Minimum heat shrinkage rate within