JPS6149411B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a method for obtaining a composite yarn, particularly a composite yarn in which a spun yarn and a continuous yarn are combined. [Prior Art] Conventionally, a method for manufacturing covered yarn by supplying staple fibers and continuous threads to a spinning device using air and centrifugal force using a rotating spinning chamber was disclosed in Japanese Patent Publication No. 1973-
This has been proposed in Japanese Patent Publication No. 10260 and Japanese Patent Publication No. 49-2380. However, the methods described in these publications are (1) open-end spinning, but the intended covering yarn in these is a core yarn made of a continuous yarn, and a spun yarn consisting of a staple bundle attached to the core yarn. It is a covering-like thread wrapped around. Furthermore, the technologies described in these publications have the following advantages: (2) maintaining the number of yarn breakages to the extent that normal 100% spun yarn is spun in a rotary spinning chamber, improving operability, and diversifying the spun materials; There is still room for improvement in order to achieve this goal. [Problems to be Solved by the Invention] From the above-mentioned viewpoint, the present invention aims to achieve the following matters. (1) Unlike the above-mentioned known technology, the present invention provides a covering-like yarn in which a continuous yarn is wound around a spun yarn that is being formed in a spinning chamber from a staple bundle, or a continuous yarn and a spun yarn in appearance. The present invention provides a method for producing a composite yarn having a twisted structure. (2) When obtaining the composite yarn, the occurrence of yarn breakage is significantly reduced, and further, the operability is improved. [Means for Solving the Problems] The present invention, which achieves the above-mentioned object, has the following configuration. That is, staple fibers are supplied to a rotating spinning chamber capable of refocusing staple fibers by centrifugal force to spin open-end spun yarn, and continuous yarn is fed to the spinning chamber to combine with the spun yarn. A method for producing a composite yarn, characterized in that a composite yarn is obtained in which a continuous yarn is composited, and then a temporary twist is imparted to the composite yarn using a temporary twist device provided continuously in the rotary spinning chamber. . In addition, in the method of the present invention described above, the object of the present invention can be achieved more effectively by adopting the following conditions in particular. (1) The yarn feeding tension T ₁ (gr) of continuous yarn material is 2≦T ₁
≦25. Preferably, the center axis of the yarn discharge pipe and the point where the continuous yarn material and the spun yarn join are separated by 5 mm or more. (2) Relationship between the number of temporary twists imparted by the temporary twist device, which is provided separately, in addition to the frictional twist imparted at the tip of the yarn discharge pipe extending into the spinning chamber. is as follows. First, let K ₁ be the twist coefficient inserted into the spun yarn formed only from staple bundles in the spinning chamber, and let K ₂ be the twist coefficient of the temporary twist applied by the twist device, and 3.5≦K ₁ +K ₂ ≦6.0... (1). Note that K ₁ and K ₂ satisfy the following formula. t ₁ =K ₁ √ ₁ , t ₂ =K ₂ √ ₁ , where N ₁ is the count of the spun yarn formed only from the staple bundle, and t ₁ and t ₂ are the number of twists (times/in). (3) As an optimal embodiment of the temporary twisting device, it is possible to actively rotate while applying frictional resistance at two or more acute-angled ends. [Operation] The present invention will be explained in more detail with reference to FIGS. 1 and 2. The staple bundle 2 is supplied to the short fiber supply pipe 4 to form discrete staples 2', which are deposited at the maximum diameter portion of the spinning chamber 6. On the other hand, the seed yarn is introduced from the yarn discharge pipe 11 into the spinning chamber 6 on the air flow A of the compressed air supply nozzle 15, and is combined with the deposited staple bundle 2 to form the spun yarn 9, which is pulled out downward. Next, the continuous yarn 1 is fed from the supply pipe 3 onto the spun yarn 9 in the vicinity 8 of its outlet end 5 to be combined with the spun yarn 9, and the surface of the spun yarn 9 is coated with a plied or covering pattern. It can be made into a composite yarn with a structure in which continuous threads are combined. Next, as a method for successfully spinning the composite yarn without any trouble of thread breakage, in addition to provision of temporary twisting by the friction member 7 supported on the member 14, a temporary twisting device is separately provided. This is rotatable on a bearing 16 by power transmitted through a belt 17, and a plurality of friction members 19, 2 are attached to the tip of the bearing 16.
Preferably, the members 19 and 20 are configured such that their acute-angled ends come into contact with the spun yarn, and are actively rotated while applying frictional resistance. An enlarged cross-section of the member 18 is shown in FIG. The obtained composite yarn 10 is transferred to delivery rollers 21, 2
2. Note that the spinning chamber 6 is rotated on a support shaft 12 supported by a belt 13 via a bearing. [Effects of the Invention] The following effects can be achieved by the above method, or a composite yarn unique to the present invention can be obtained. (1) It is possible to significantly expand the range of materials in which the continuous thread component can be applied, and to increase the proportion of the continuous thread component in the composite yarn. Until now, it has been difficult to select a wide range of continuous yarn components due to the relationship with thread breakage. Furthermore, in the prior art, when the ratio of the continuous yarn component is increased, the spinning of the spun yarn component becomes unstable and yarn breakage occurs frequently, and the ratio of the continuous yarn component is limited to 25 to 30%. According to the present invention, it can be improved from 5% to 60%. Therefore, the composite yarns obtained can vary widely, from spun-like yarns with a high spun yarn component to filament-like yarns with a high continuous yarn component. It is possible to design it as desired. Here, in order to exhibit the combined effect and function with the continuous filament component, the component ratio needs to be 5% or more. (2) In the present invention, there is no yarn breakage, and the twist coefficient of the open-end spun yarn can be lowered, making it possible to set K ₁ ≦3.0, which allows the yarn of the spun yarn component to be extremely soft and final. Even when fabricated, a soft texture can be obtained. In conventional methods, the twist coefficient K ₁ ≦4.0 is common, and the resulting composite yarn also has a rough and hard texture with a crisp feel. In addition, the number of twists of the continuous yarn and the spun yarn in the composite yarn obtained by the present invention is determined by the number of twists t ₁ determined by the K ₁ value.
The lower the _K1 value, the lower the twist twist (also known as the number of bearing twists or the number of alternating twists), making the resulting composite yarn superior in soft bulk. You can. (3) Combining the spun yarn component and the continuous yarn component is promoted by actively applying the temporary twist using a separate temporary twisting device, and the twist insertion at the coalescence point 8 is carried out with high density. , because it is carried out smoothly, it is possible to significantly reduce thread breakage. (4) By using the technology in item (3) above, it is possible to significantly reduce the twist coefficient K ₁ , thereby significantly improving productivity. That is, compared to the conventional case where K ₁ =4.0, when the present invention is adopted and K ₁ =2.0, the production speed can be doubled. (5) The composite yarn obtained by the present invention has a staple bundle (open-end spun yarn) serving as a core yarn, the number of twists that the staple bundle has, the number of twists that are substantially the same as the twist direction, and continuous in the twist direction. The threads are twisted, and as a result, the continuous threads blend well with the core yarn, making the yarn appearance and gloss of the knitted fabric uniform, and with less roughness, making it look like a single-component yarn. A good product that looks like it is made of strips can be obtained. On the other hand, in the case of composite yarns in which the number of twists of the continuous yarn is different from that of the core yarn, the yarn does not curl easily and the yarn appearance becomes uneven.
The gloss of the knitted fabric also becomes non-uniform and it has a rough surface feel, which is completely undesirable.
Composite yarns etc. using a covering device described in the above publications fall under this category. [Example] According to the spinning mode shown in Fig. 1, polyester staple 2d, 51 mm was used as the staple component, and polyester filament yarn was used as the continuous yarn component (hereinafter, in the examples, the continuous yarn is referred to as filament yarn) 75D-
Supplied 36fil. The spun yarn 9 formed from the staples and the filament yarn were combined in the vicinity 8 of the filament yarn supply pipe 3 to obtain a yarn structure in which the filament yarn 1 was twisted on the surface of the spun yarn 9. Experimental results regarding the relationship between the presence or absence of the temporary twist peg portion 18 and the spinning state, and the relationship between the tension applied to the filament yarn 1, spinnability, and yarn quality are also described below. Spinning conditions Rotation speed of spinning chamber 6: 35000 r.pm, Air pressure of seed yarn feeding nozzle 15: 0.1 Kg/cm ² , Number of twists of spun yarn 9 by staple bundle: K ₁ =
2.5 and 4.0, spinning count of spun yarn 9 by staple bundle: 1/32
(Metric type), Spinning speed of composite yarn 10: 81.8 m/min, Shape of friction members 19, ₂₀ : As shown in Fig. ₂ . It is shown in Table 1.

【table】

[Table] If the number of broken threads is less than 50/10 ³ sp.hr, there will be no problem in operation. Therefore, as is clear from Table 1, thread breakage problems occur when the (K ₁ +K ₂ ) value is lower than 3.5 and when it exceeds 6. In addition, regarding the relationship between yarn properties and _K1 value, there is a strong correlation in terms of bulkiness and bending stiffness, and the lower the _K1 value, the higher the bulkiness.
A flexible thread is obtained. Next, Table 2 shows the relationship between the tension T ₁ of the filament yarn 1, spinnability, and yarn structure.

【table】 In the above table, the classification of yarn structure is as follows.

[Table] When the T ₁ value is 0 to 10gr, the filament yarn is twisted in a covering state on the surface of the spun yarn in terms of yarn structure, and as the T ₁ value approaches 0, the covering state of the filament yarn becomes looser. There are also cases where the filament yarns overlap in the longitudinal direction of the spun yarn axis, forming a slab-like shape. Therefore, in order to obtain a normal filament yarn with no irregularities in the covering state, it is preferable that T ₁ ≧2. Further, when T ₁ ≧10, the spun yarn and the filament yarn become intertwisted, and the structure is such that the two are tightly combined. Therefore, even if the number of combined twists between the spun yarn and filament yarn is slightly twisted, the state of intertwisting between them is stable, and the twist movement due to straining friction, etc., and the twist density accompanying this are stable. No unevenness occurs. Figure 3 shows a model of these yarn structures. When T ₁ is a low tension, as shown in Figure 3A, a spun yarn component 23 and a filament yarn 24 loosely twisted in a covering manner are formed. As a composite yarn, it is bulky. T ₁
If the value is high, the filament yarn 24 is twisted tightly around the spun yarn 23 as shown in FIG. In this case, the thread becomes stiff and bulky. As mentioned above, the twisted state of the continuous yarn in the composite yarn obtained by the present invention may be loosely twisted in a covering shape or tightly twisted in a so-called intertwisted state. It is intended to be presented. Next, regarding the ratio of filament yarn in the composite yarn and the yarn properties, the ratio is P (P = (weight of filament yarn component / weight of (spun yarn component + filament yarn component)), and the change of P value and yarn As a result of various experiments regarding the appearance and product evaluation of fabrics using this, P>
In the case of 0.6, the yarn appearance of the composite yarn is similar to that of a filament yarn, and the characteristics of the spun yarn components cannot be effectively exhibited. In addition, when P<0.05, the filament yarn becomes covered or intertwisted, resulting in less effects such as uniformity of yarn appearance, improvement in strength, anti-pilling properties, etc. As is clear from the above examples, the composite yarn obtained by the method of the present invention can be produced by appropriately designing the filament yarn ratio and twist coefficient _K1 .
The effect of twisting or twisting the filament yarn can be maximized, and a final product with excellent quality, texture, and functionality can be obtained. The composite yarn obtained by the present invention can be applied to a wide range of products for outerwear, from spring/summer to autumn/winter. Continuous yarn components include spun yarn and filament yarn (multifilament, monofilament). Furthermore, various processed filament yarns can be used, and synthetic fibers such as acrylic, polyester, rayon, acetate, and nylon, as well as blended fibers of these and natural fibers, can be used. .

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an apparatus in which the present invention is implemented, and FIG. 2 is a longitudinal sectional view of a friction member of the apparatus. FIG. 3 is a model diagram of a composite yarn obtained by the present invention. 1: Continuous yarn material, 2: Staple bundle, 3: Continuous yarn feeding tube, 6: Spinning chamber, 7: Friction member, 15:
Seed yarn supply nozzle, 18: Temporary twisting member, 21, 2
2: Delivery roller, 19, 20: Friction member.

Claims (1)

[Scope of Claims] 1. Supplying staple fibers to a rotating spinning chamber capable of refocusing staple fibers by centrifugal force to spin an open-end spun yarn, and feeding a continuous yarn to the spinning chamber. to obtain a composite yarn in which the spun yarn and the continuous yarn are combined, and then a temporary twist is imparted to the composite yarn by a temporary twist device provided continuously in the rotating spinning chamber. Method for manufacturing composite yarn. 2 Feeding the continuous yarn to the rotating spinning chamber at a tension of 2
A method for producing a composite yarn according to claim 1, which is carried out in a range of 25 g. 3 The number of twists imparted in the rotating spinning chamber and the temporary twisting device are respectively t ₁ and t ₂ (here, t ₁ = K ₁ √, t ₂ = K ₂ √ and Ne
means the count of the spun yarn formed only from staple bundles) and when the twist coefficients are K ₁ and K ₂
The method for producing a composite yarn according to claim 1 or ₂ , wherein the composite yarn is given a twist in the range of 3.5≦K ₁ +K 2 ≦6.0. 4. The method for producing a composite yarn according to claim 1, 2, or 3, in which a spun yarn is formed with a twist coefficient K ₁ of the continuous yarn of 3.0 or less.