JPS6319611B2 - - Google Patents

Description

[Detailed description of the invention]

In the present invention, in the twisting part of false twisting or false twist crimp processing, other yarns (wrapped yarns) are
In a composite false-twisted crimped or non-crimped yarn (fancy yarn; hereinafter simply referred to as "composite yarn") having a slab obtained by winding the yarn, some or most of the slabs are made into a five-fold winding structure. As a result, it is possible to create
This invention relates to a composite textured yarn that has a very large fancy effect and a fine/thickness difference. Conventionally, there is a composite textured yarn that uses false twisting and has alternately single-wound portions and triple-wound portions in the length direction of the yarn. (Refer to Japanese Patent Publication No. 50-35147, etc.) However, the biggest drawback of the yarn obtained by these methods is that the upper limit of the number of windings is limited to a triple-wound structure, so the thick-to-thin ratio remains constant. The artificial feel became stronger, and the fancy effect of the difference in thickness was weaker than that of natural fibers. Here, the reason why the upper limit of the number of windings is limited to three is mainly because both of the supplied yarns are flat yarns (FIATYARN), and furthermore, to ensure ease of handling of the yarn in the subsequent process, that is, weaving and knitting process. by. In the above method, it is of course possible to form a multilayer winding part of 5 or more layers in the false twisting part, but in this case, after the untwisting process, the outermost layer of yarn becomes in a flowering state, and during the weaving preparation process and weaving. When the outermost layer of yarn passes through a reel, or during rewinding during the knitting preparation process, or when guiding the yarn during knitting, the outermost layer yarn shifts due to ironing, causing thread trimming or machine stoppage, which significantly reduces production efficiency, making it practically difficult to use. In this way, the conventional slab structure is limited to a triple spiral structure, so the slab form becomes cylindrical and has a strong artificial feel, making it extremely difficult to manufacture a slab with a spindle form that is closer to natural fibers. It was difficult to create a pongee-like composite yarn with a large difference in thickness, which made it more fancy, and therefore it was impossible to create it. The object of the present invention is to have a spindle-shaped slab similar to that of natural fibers by using synthetic or semi-synthetic filament yarn, and to expand the width of change in the thickness of the slab, thereby producing a fancier thick and thin effect. Moreover, it is an object of the present invention to provide a composite textured yarn and a method for producing the same, which are significantly improved in handling properties in subsequent steps. As a result of various studies aimed at achieving the above object, the present inventors have found that by using a filament yarn with a certain friction coefficient or a large fastener effect as a winding yarn, a stable and spindle-like structure can be created. The inventors have discovered that a five-fold wrapped portion can be obtained, and have arrived at the present invention. Thus, according to the present invention, (1) In a composite false-twisted crimped or non-crimped yarn in which at least two types of yarns form a core-sheath structure, the yarns constituting the sheath portion have loops and curls. Or a filament yarn having fuzz, the yarn having a single layer, triple layer, triple layer, etc. around the core along its length.
Composite false-twisted crimped or non-crimped yarn, characterized in that it is individually wrapped in five layers, and the structure of the five-fold wrapped portion is held by loops, curls, or mutual entanglement of fluff, and (6 ) In the simultaneous feeding false twisting method, which consists of winding another yarn B around the yarn A in a false twisting state using its rotational force, and with or without using a heater, a loop is used as the yarn B. , using a curled yarn or a fluffy yarn, and traversing the supply point of yarn B to yarn A artificially or randomly under the condition that the overfeed amount of yarn B wrapping around yarn A is 80% or more. Composite false twist crimping or non-crimping processing characterized by winding yarn B around yarn A so as to individually form a single-wound part, a triple-wound part, and a quintuple-wound part. A method of making yarn is provided. To further explain this, in the present invention, by increasing the inter-yarn friction coefficient of the wound yarn to a certain level or more (K index described later is 2.5 or more, specific examples are yarns with loops, curls, and fluff). Even if the winding structure of 5 or more layers formed in the false twisting part is subjected to rotational force in the opposite direction to the winding at the twisting and untwisting point in the spindle part, the yarn in the outermost layer separates and blooms. There is no such thing as
Therefore, it has been found that good weaving and weaving properties can be obtained without shifting the wound threads of the outermost layer even when subjected to a straining action in the weaving preparation process, weaving process, knitting preparation process, or knitting process. FIG. 1 is a side view of a composite textured yarn according to the present invention, in which the yarn is arranged in a relatively straight line.
Yarn B (wrapped yarn) is wound around the (core yarn) in various thicknesses. Here, W ₁ is a single-wrap part, W ₃ is a triple-wrap part, and W ₅ is a quintuple-wrap part. In particular, W ₅ is a double-wound part at both ends of the triple-wrap part W′ ₃ as shown in the figure. The thread B is wound around the thread B twice. This is because while the normal triple-wound part W ₃ exhibits a cylindrical slab effect, W' ₃ extends at both ends of W ₅ , and then W ₁ exists, so visually it looks like a 5-wrap part. The wrapped portion will be visible on the spindle. In addition, the individual lengths of W ₁ , W ₃ , and W ₅ in the longitudinal direction are indicated by l ₁ , l ₃ , and l ₅ , respectively, and unless special processing conditions are adopted, l ₁ > l ₃ > l ₅ It is preferable that the structure is formed so as to satisfy the following relationship. The frequency of occurrence of W ₅ at this time is at least 1 per 1 m of composite processed yarn, and in relation to W ₃ , the number of W ₃ and the number of W ₅ (in this case, the unit length of l' ₅ W ₅ is 30% of the total of
It is preferable that the amount of In such a composite textured yarn, W ₁ , W ₃ ,
The change in length between W ₅ and W ₃ is different from the conventional one.
Due to the coexistence of W ₅ , the changes in thickness and the differences between W ₃ and W ₅ combine to create a very natural fancy effect. Here, the reason why W ₅ actually exists is that in the present invention, a yarn with a high coefficient of friction between the yarns is used as _the wrapping yarn for the yarn B, and therefore, for example, 3 It is presumed that the threads in contact with each other between the overlapped part and the quadruple part, and between the quadruple part and the quintuple part are firmly held together by frictional force. In particular, when yarn B has loops, slack, curls, or fuzz, which increases the coefficient of friction,
In W ₅ (of course, the same is true in W ₃ ), there are loops between adjacent yarns in the multiple winding state.
The slack, curls, and fuzz intertwine with each other to hold the wrapped structure more firmly. Next, a method for manufacturing such a composite textured yarn will be explained with reference to FIG. FIG. 2 is a schematic diagram showing an example of the process of carrying out the method of the present invention, in which yarn 1 (corresponding to yarn A in FIG. 1) is connected from supply roller 4 to heater 5 (not necessarily required). The fibers pass through to the false-twisting spindle 6 and are false-twisted. On the other hand, the filament yarn 2 having loops, curls, or fluff is fed to the yarn 1 undergoing false twist rotation between the inlet end of the heater 5 and the supply roller 4, as shown by the arrow.
The material is traversed intermittently, and depending on the number of traverses, three or five or more wrapped portions are formed (on the other hand, when the traverses do not overlap, a single wrapped portion is formed).In this state, it is heat-set. After that, it is untwisted on the spindle 6 and onward, and then the yarn is twisted on the take-up roller 7.
It passes through guides 8 and 9 and is wound up as cheese 10. In such a process, when a flat yarn is used as the winding yarn as in the past, the winding yarn makes an irregular traverse movement in the running direction of the core yarn depending on the amount of overfeed, and the tension between the winding yarn and the core yarn increases. and the turning force is well balanced. This state usually occurs when the overfeed amount of the wound yarn is 80% or more, and it has been found that when the overfeed amount is 110% or more, a five-fold winding structure may occur in the false-twisted part. However, when using a flat yarn as a winding yarn and using a winding overfeed amount of 110% or more, 5
Due to the untwisting action of the heavily wrapped structure slab, the outer layer immediately develops into a flower-like shape, causing problems in subsequent processes.Furthermore, frequent thread breakage occurs during thread processing, making it extremely difficult to actually produce it. In the case of conventional flat yarns, K
It was found that this was due to the low index (friction coefficient between yarns) of around 1.7. On the other hand, as in the present invention, the friction coefficient between yarns is 2.5 to 4.0.
When using yarns in the range of , the adhesive force between the yarns is large, so even when subjected to the above-mentioned untwisting action, the flowering phenomenon of the quintuple-wound structure does not occur, and the desired composite processed yarn can be obtained. . To explain the wrapped yarn specifically here, it is a bulky entangled yarn with loops and curls obtained by treating a flat yarn with a turbulent air jet, or a fluffy yarn obtained by rubbing a loop or curled yarn with a friction body, or Spun yarn is preferred. Incidentally, the K index, which is a characteristic value of the wound yarn, is measured by the method shown in FIG. In other words, the yarn is sent out from the delivery roller (speed 119 m/min),
Wrap once around a rotating guide (rotational resistance; output side yarn tension/input side yarn tension = 1.05 or less), and run with the yarn entering the rotating guide and the yarn coming out of the guide twisted together once. (90°) and take it off with a take-up roller (speed 120 m/min). At this time, the tension of the yarn before guiding is T ₁ and the tension after guiding is T ₂ , and it is calculated as K=T ₂ /T ₁ . The measurement location shall be at the standard temperature and humidity conditions according to JIS regulations (Z8703). When carrying out the method of the present invention, the overfeed amount of the wound yarn (yarn 2) is most important and is generally maintained at 80% or more, preferably 110% or more. In addition, the twisting tension generally needs to be in the range of 0.5g/de to 0.8g/de, and the heater temperature can be selected as appropriate depending on the type of yarn, but 180℃ or higher is usually appropriate. It is. The number of false twists is also well known in the industry.

[Formula] (where α is the twist coefficient and De is the denier of the core yarn). Furthermore, processing methods include not only conventional overfeeding of several percent or stretch type false twisting, but also in-line processing using semi-drawn yarn or undrawn yarn as the core yarn.
A draw method will also be adopted. On the other hand, the winding thread 2
As the material, polyester, polyamide, acetate, etc. are preferably used, but especially for the former two, any drawn yarn or semi-drawn yarn can be used. As described above, according to the present invention, filament yarn with a high friction coefficient, whose wrapping behavior is completely different from that of conventional flat yarn, is used as wrapping yarn in the production of slab-like composite processed yarn using a false twisting process. By using strips, it is possible to form a five-fold wrapping part on the spindle in addition to the conventional triple-wrapped part on the spindle, so the slab pattern (change in length, period, thickness) It is possible to provide a composite processed yarn that exhibits an extremely natural fancy effect. Furthermore, in the multiple wrapping section, the threads between each layer form a stable slab due to the frictional force or entanglement effect with each other. Since the shape is retained, the efficiency of weaving is also significantly improved. Furthermore, when a yarn having loops, curls, or fluff is used as the winding yarn, the texture is different from that of a flat yarn, and there is an advantage that the yarn has a soft texture similar to that of a spun yarn. Example In the process shown in Figure 2, polyester (Tetron) multifilament yarn was used as thread 1.
150de/48fil, and polyester (Tetron) multifilament yarn 150de/48fil as thread 2
A loop yarn (K index = 3.8) obtained by introducing 72fil into a Taslan nozzle (described in Japanese Patent Publication No. 47-42068) under 10% overfeed was used. This taslan treatment was provided in front of the supply roller 3 and was performed continuously. The processing conditions at this time are as follows. (1) Number of false twists 1950T/m (Z) (2) Yarn speed (take-up roller 7) 62.5m/min (3) Twisting overfeed -2% (twisting tension 0.12g/de) (4) Winding Yarn overfeed 120% (5) Heater temperature 220℃ (6) Taslan nozzle air pressure 4.5Kg/cm ²・G Meanwhile, in the above example, polyester (Tetron) multifilament 150 de/
The same processing was carried out except that 72fil was used in the form of a flat yarn without being subjected to taslan processing.
(Comparative Example) The properties of the composite processed yarn obtained through these experiments are shown in Table 1 (slab shape) and Table 2 (stability against ironing).

【table】

【table】

[Table] From the results in Tables 1 and 2, it can be seen that the composite textured yarn of the present invention has two levels of slabs, W ₃ and W ₅ , compared to the monotonous pattern effect of conventional cylindrical triple wrapping. And the change in shape between W ₃ and W ₅ , the change in thickness,
A mixture of length changes creates a natural pongee-like effect. Moreover, since the _W5 according to the present invention is not affected by the straining applied during knitting and weaving, the characteristics of the processed yarn are directly reflected in the fabric.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the form of the composite processed yarn of the present invention, and Fig. 2 is a 1st view of the manufacturing process of the composite processed yarn of the present invention.
A schematic diagram showing an example, and FIG. 3 is a process diagram showing a method for measuring the K index. In Fig. 1, A...core thread, B...wound thread, W ₁ ...single winding part, l ₁
...Length of W ₁ , W ₃ ...Triple winding part, l ₃ ...Length of W ₃ ,
W ₅ ...5-fold winding part, l ₅ ...length of 5-fold winding part, In Fig. 2, 1... core thread, 2... winding thread, 3... supply roller for winding thread 2, 4... core Yarn 1 supply roller, 5... heater, 6... spindle, 7... take-up roller, 8, 9
... Guide, 10... Winding cheese, In Fig. 3, Y... Measuring yarn, 11... Delivery roller, 12
...rotation guide, 13...take-up roller.

Claims (1)

[Scope of Claims] 1. A composite false-twisted crimped or non-crimped yarn in which at least two types of yarns form a core-sheath structure, in which the yarns constituting the sheath portion have loops, curls, or fluff. The filament yarn is individually wrapped around the core along its length in single, triple or five wraps, the structure of the five wraps being loops, curls or A composite false-twisted crimped or non-crimped yarn characterized by being held together by the mutual entanglement of fluff. 2 The number ratio of the 5-fold wrapping part to the entire multiple wrapping part (the sum of the 3-fold wrapping part and the 5-fold wrapping part) is 30.
% or more of the composite false twisted crimped or non-crimped yarn according to claim 1. 3. Claim 1 in which the lengths (l ₁ , l ₃ , l ₅ ) of each of the single, triple, and quintuple wrapped portions satisfy the relationship l ₁ > l ₃ > l ₅ Composite false twisted crimped or non-crimped yarn as described. 4. The composite false-twisted crimped or non-crimped yarn according to claim 1, wherein the 5-fold wrapping portion exists at a frequency of at least one or more per 1 m of the false-twisted yarn. 5 Claim 1 in which U% is 10% to 50%
Composite false-twisted crimped or non-crimped yarn as described in Section 3. 6 In a simultaneous supply false twisting method that consists of winding another yarn B around yarn A in a false twisting state using its rotational force, and with or without a heater, a loop is used as yarn B. , using a curled yarn or a fluffy yarn, and under the condition that the overfeed amount of the yarn B wrapping around the yarn A is 80% or more, the feeding point of the yarn B to the yarn A is traversed intentionally or randomly. There is one thread B around thread A.
A method for producing a composite false-twisted crimped or non-crimped yarn, which is characterized by winding the yarn so as to individually form a double-wound part, a triple-wound part, and a quintuple-wound part. 7. The method for producing a composite false twisted crimped or non-crimped yarn according to claim 6, wherein the supplied yarn B has a K index (friction coefficient between yarns) of 2.5 to 4.0. [However, the above K index follows the following definition. The yarn is sent out from the sending roller (speed 119 m/min) and wrapped once around a rotating guide (rotational resistance; exit yarn tension/input yarn tension = 1.05 or less), and at that time, the yarn entering the rotating guide and the guide The threads coming out from each other are 1
Run the twisted state (90°) and take it off with a take-up roller (speed 120 m/min). At this time, the tension of the thread before the guide is T ₁ and the tension after the guide is
Calculate as T ₂ as K=T ₂ /T ₁ . The measurement location shall be at the standard temperature and humidity conditions according to JIS regulations (Z8703). 8. The method for producing a composite false-twisted crimped or non-crimped yarn according to claim 6, wherein the yarn B has been given loops and curls by treatment with a turbulent jet. 9. The method for producing a composite false-twisted crimped or non-crimped yarn according to claim 6 or 8, wherein the fuzz of yarn B is obtained by cutting loops or curls.