JPS6112951A - False twisted fancy yarn and its production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a false-twisted design yarn and a method for producing the same, and more specifically, a pongee-like false-twisted design yarn consisting of a core yarn and a sheath yarn, and the production thereof. Regarding the law.

<Prior Art> Currently, a method of producing pongee-like yarn from filament yarn using false twisting is widely used.

The pongee-like yarn obtained by this method has one filament arranged in a relatively straight line in the core, and the other filaments having at least a single spiral part and a triple spiral part alternating around the core filament. It has a structure in which it is formed and wrapped (see Japanese Patent Publication No. 50-35147). For this reason, this pongee-style yarn, although it is composed of filament yarn, is very popular as a women's fabric.

However, unlike the regular line of natural silk, such pongee-like yarn lacks irregularity because the shapes of the slabs are similar to each other, and the spacing has a certain repetition. In addition, the triple spiral part that forms the slab can easily move due to rolling friction, causing problems in the post-sizing process and changing the shape of the slab7.
(There are some drawbacks.

<Objective of the Invention> The present invention provides a false twisted design yarn that improves the drawbacks of the conventional pongee-like yarn made of filament yarn, is rich in irregularity, and has a stable slab shape, and a method for producing the same. With the goal.

<Configuration of the Invention> The present invention has the following configuration to achieve the above object. That is, the present invention provides a false-twisted design yarn consisting of a core yarn and a sheath yarn, in which the core yarn is a false-twisted filament yarn having a substantially uniform thickness in the length direction, and the sheath yarn is a false-twisted filament yarn having a substantially uniform thickness in the length direction. Made of filament yarn with randomly drawn parts,
A false twisted design yarn characterized in that the sheath yarn is wound around the core yarn while alternately forming a triple winding part and a single winding part, and when false twisting the filament yarn. , birefringence in the length direction 100×10 ~ 160×104
The thin part and birefringence of 4 x 1 o-” ~ 50 x
10-' thick part, and the thickness unevenness U of the entire system
A false twisted design yarn characterized in that thick and thin yarn having an R value of 5qIb to 25% is supplied to the filament yarn in the heating region and wound while alternately forming a triple winding part and a single winding part. This is the manufacturing method. The present invention will be described in detail below.

First, the false twisted design yarn of the present invention consists of a core yarn and a friend sheath yarn wrapped around the core yarn while forming triple-wrap portions and single-wrap portions alternately.

The core yarn is a false twisted filament yarn of substantially uniform thickness in the feldspar direction. Here, the false twisted filament yarn having a substantially uniform thickness in the length direction is obtained by false twisting a so-called drawn yarn. This false twisted filament yarn was selected as the core yarn in order to prevent a slimy feeling and make it suitable for women's fabrics. The filament yarn means both multifilament yarn and monofilament yarn, but multifilament yarn is preferable from the viewpoint of texture. The material for such filament yarn is preferably polyester fiber. This is because the opening and setting properties are good.

Next, the sheath yarn is a filament yarn in which unstretched portions are randomly present in the length direction. This enhances the irregularity in combination with the fact that the sheath yarn is wound around the core yarn while forming triple-wrap portions and single-wrap portions alternately.

Furthermore, the fact that the triple-wound part and the single-wound part are wound alternately is a method of creating a so-called pongee-like thread, and the unstretched part is random in the length direction as a sheath thread. Because the filament yarns that exist in In addition, the length of the triple wrapping part is preferably 1 to 60 ax for producing a pongee-like texture and improving irregularity, and particularly preferably 4 to 60 ax. Here, the method for producing the false twisted design yarn of the present invention will be further explained based on the drawings.

In the figure, the filament yarn Fl of the core yarn is unwound from the burn thick and thin yarn F, and the filament yarn Fl is unwound from the burn P, and passes through the supply roller 3 and is over-fed by 1 or +30% with respect to the core yarn.
~ +150 degrees heating area (supplied to the filament yarn F1 of the core yarn between the supply roller 2 and the false twisting device 5, and the triple winding part and the single winding part are alternately applied to each filament yarn F1) The filament yarn F1 serving as the core yarn may be a multifilament yarn or a monofilament yarn, but a multifilament yarn is preferable from the viewpoint of texture.

In addition, the specific gravity of the filament yarn F1 of the core yarn is 1.3.
~1.4, birefringence ΔQ is 90X10-" ~200
The one in XIO””1 is wild. When making a false twisted yarn with a triple winding part, the tension is applied only to the core yarn.9
, it is necessary to have a strength equivalent to 90% of the strength, and if the strength is outside this range, the yarn breakage during false twisting will increase and the processed yarn characteristics will not be obtained.

As the material, polyester multifilament yarn is preferred from the viewpoint of setting properties. What is particularly important in the present invention is the property of the sheath yarn, which is thick and thin yarn 5゛6F. The thick-and-thin thread F must have a birefringence of 100XIO-'' to 160X10-''. If it is less than 100XIO-'', the difference in dyeing will be noticeable between the thick part and the thick part. c (become, the other 160
This is because if it exceeds ×104, it will be difficult to spin thick and thin yarn, and the effect will also be saturated. Look, the birefringence of the thick part is 4X10-
Must be "~50X10-".

If the temperature is 4X10, the yarn strength will decrease and deterioration will occur during weight reduction processing on fabrics, while if it exceeds 50X10-", the contrast of the apparent thickness and dyeing difference for thin parts will decrease, so In addition, the thick type mottling UR value of the entire system must be between 5% and 25%.If it is less than 5%, the mottling will not be noticeable, and if it exceeds 25%, it will deviate from the natural mottling. The UR value is set in the upper range for quality defects.Here, the UR value is determined using a Zelbegger evenness tester at a yarn speed of 5.
0m/min, thread strength 0. ) f/d, Worstanormal ([t-measured under conditions of chart speed 25 pieces/min.

The maximum value (@
The difference between the minimum value (@) corresponding to the thread length of 20 m1C (4 values) is calculated and averaged to obtain the t value, which represents the size of a spot.The intensity is 2.0 to 4. Thick and thin yarns made of polyester fibers with a density of 0 no/d are preferable.If the strength is less than 2.097 d, the processability will be poor.
On the other hand, if it exceeds 4.0 fed, the elongation will be low and the workability will be poor.

<Effects of the Invention> Accordingly, according to the present invention, the part where the sheath yarn wraps around the core yarn while forming a triple winding part becomes a slab, and this slab is free from changes in the slab shape due to uneven thickness of the sheath yarn. superimposed,
It is natural and complex, and a straight line of irregularly twisted false twists can be obtained, and the offering obtained by dyeing and dyeing fabric using this false twisted design yarn is a crystal of one sheath yarn. Due to variations in the degree of dyeing and orientation, the dye has complex dyeing differences and irregular appearance, which is a remarkable effect.

Example 1 Ordinary polyester multifilament yarn (75
Polyester multifilament yarn (average 75 denier 736 filament J thick and thin yarn CURR2) is used as the sheath thread.
O38%, fresh water yield N29.0chi, strength 3.42 f/
d, the birefringence of the cold part is 32 × 10-", and the birefringence of the thin part is i 123. Manufactured double gold thread.

The false twisting conditions at this time are 1680 rotations of the false twisting spindle.
00 rpm, surface speed of supply roller 2 71 m/min,
The surface speed of the supply 4-23 was 139 m/min, the first heater temperature was 160°C, the second heater temperature was 175°C, and the surface speed of the drawing roller was 73 m/min. the false twisted composite yarn as a weft;
Plain weave (warp density 162 threads/in-*weft density 4 threads/in,
) is woven and subjected to the usual dyeing process, the surface of the fabric is extremely dynamic and varied, with irregularities, and the texture is rich with a mild crispness. For comparison, both the core and sheath yarns are ordinary polyester multifilament yarns (semi-dull, 7
5 denier/36 filament] was used to create a yarn 7 having the same slab change as that of the present invention, and this yarn was used as the weft, and a polyester multifilament yarn with a triangular cross section prite (50 denier 736 filament) was used as the warp. When we wove a plain weave similar to the one used in ≠Mi and then subjected it to the usual dyeing process, the fabric lacked irregularity and had a slightly crisp texture.

Example 2 A normal polyester multifilament yarn (semi-dull, 150 denier 74B filament) was used as the core yarn, and thick and thin yarn of the same polyester multifilament yarn as the sheath yarn of Example 1 was used as the sheath yarn [average 75 denier/36 filament] ) to produce short slub false twisted design yarns with lump lengths varying in the range of 1 to 41. The false twisting conditions were as in Example 1. Next, using this tentative straight line, the same plain weave as in Example 1 (warp density 162 threads/in.
, + weft, 7 pieces/1n,) was woven, dyed in the same way, and examined, and the changes were dynamic and irregular, giving it a natural feel. For comparison, a slab was prepared using ordinary semi-dull polyester multifilament yarn (150 denier/48 filaments) as the core yarn and ordinary polyester multifilament yarn (75 denier/36 filaments) as the sheath yarn. A large yarn having short slabs with a length ranging from 1 to 4 cs was produced.Using this yarn, a plain weave similar to that of the present invention was woven and subjected to the same dyeing power process, and the fabric was examined. It is poor in quality and lacks irregularity.

[Brief explanation of drawings]

The figure is a schematic side view of one example of an apparatus used to implement the present invention. L@@・Filament yarn F,・・Fist thick and thin yarn 2.3・0・Supply roller 4・@#11 Musical heater 5・・・False twisting device 6・・・Drawer roller

Claims (1)

[Claims] 1. In a false twisted design yarn consisting of a core yarn and a sheath yarn, the core yarn is a false twisted filament yarn having a substantially uniform thickness in the length direction, and the sheath yarn is a false twisted filament yarn having a substantially uniform thickness in the length direction. A false twist characterized in that the sheath yarn is wound around the core yarn while alternately forming triple-wound portions and single-wound portions. Design thread. 2. When false-twisting the filament yarn, a thin part with a birefringence of 100 x 10^-^3 to 160 x 10^-^3 and a birefringence of 4 x 10^-^3 to 50 are formed in the length direction. ×10＾−
A thick-and-thin yarn having a thick part of ^3 and a thickness unevenness UR value of the yarn as a whole is 5% to 25% is supplied to the filament yarn in the heating area to form a triple winding part and a single winding part. A method for producing a false-twisted design yarn, which is characterized by winding the yarn while forming sections alternately.