JPH04202820A - Interlaced combined filament yarn - Google Patents

Abstract

PURPOSE:To obtain the subject soft yarn which is interlaced combined filament yarn of plural filaments, one kind of filament thereof having a specific flatness, a specified number of twists and a specific interlacing degree, excellent in bulginess, tenseness, stiffness and productivity and useful as woven, knitted fabrics, etc. CONSTITUTION:The objective yarn which is interlaced combined filament yarn prepared by interlacing two or more kinds of filaments such as polyester fiber by fluid interlacing. One kind of the filaments thereof is latently twistable fiber having 2.5-15.0 flatness and 3-100 twists/10cm number of twists in the combined filament yarn. The interlacing degree of the combined filament yarn is >=25 interlacements/m.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mixed yarn. In particular, the present invention relates to intertwined mixed fiber yarns having good fullness and tension.

[Prior Art] As a method of giving fullness to woven or knitted fabrics, it has been known to combine two yarns with different shrinkage rates to form a mixed yarn. However, the mixed fiber yarn obtained by this method will swell under no load due to the difference in yarn length due to the difference in shrinkage rate, but sufficient swell cannot be obtained when the yarn is constrained as in textiles. Hateful. Furthermore, in order to obtain a large bulge, a method is also known in which a fluid treatment is performed to form loops on the yarn surface.

However, in this case, the yarn loops are approximately the same size, resulting in poor natural bulge. Furthermore, the unwinding property is extremely poor due to the fastener effect in which the yarn loops are entangled with each other, resulting in poor productivity.

[Contents of the Invention] The present inventors have continued their research with the aim of obtaining a yarn that is highly productive, soft, and has natural fullness and tension. As a result, the yarn is made into an intertwined mixed yarn consisting of two or more types of filaments, and one of them
It has been found that the above object can be achieved if the type of filament is a flat filament having a specific degree of flatness and number of twists.

That is, the present invention provides an intertwined mixed yarn in which two or more types of filaments are entangled by fluid entanglement, and one of the filaments has (a) a flatness of 2.5 to 2.5.
15.0, and (b) number of twists in mixed yarn 3~
It is a latent twisted fiber having 100 pieces/10C■,
The present invention is an interlaced mixed yarn characterized in that the degree of entanglement of the mixed yarn is 25 pieces/m or more.

Here, the above-mentioned "flatness", "number of twists", "degree of entanglement", and "torsion shrinkage rate" described later are those measured as follows.

l-King-1 In a cross section where the filament is cut at right angles to the length direction of the filament, when the maximum length is L and the maximum thickness is W, the flatness is expressed as -L/W. The maximum length and maximum thickness W measurements are shown in Figure 1 (
As described in a) to (C).

Lm 11 A load of 0.1 g/d is applied to the mixed yarn to make the yarn taut, and the number of twists per 10 ci+ is counted using a magnifying glass to determine the number of twists.

Interlacing [ Insert a pin into the unentangled part of the yarn under a tension of 0.02 g/d, move the pin in the longitudinal direction of the yarn under a tension of 0.01 g/cl, and interlace the point where the pin stops. Toshiso 1m
Count the number of hits and use it as the degree of confounding.

[A load of 1 mg/d was suspended on the k-twin 1-thread thread, treated in hot water at 90°C for 30 minutes, dried with the load applied, and the length 11 at that time was measured. do. Next, the length 12 when a load of 50+g/d is suspended is measured. The torsional shrinkage rate is determined by the following formula.

The present invention is characterized in that a flat latent twisted fiber having the above-described degree of flatness and number of twists is used as one type of filament among the plurality of filaments constituting the mixed fiber yarn. These flat twisted fibers are sequentially twisted in the longitudinal direction of the fibers at the maximum length of the cut surface in the mixed yarn, so that the appearance is that the cylindrical fibers with the same round cross section as the maximum length are mixed. It exerts the same effect as when it is contained in yarn. At this time, single yarns of flat twisted fibers exist randomly inside the mixed fiber yarn due to the fluid treatment, so that the mixed fiber yarn has various spaces. That is,
It has a natural bulge and is firm.

In order to provide such space, fullness, and tension, the flat twisted fibers in the present invention have a flatness of 2.
5 to 15, and the number of twists is 3 to 100/1. Ocm
It is necessary that In that case, it is desirable that the flat twisted fibers have a twist shrinkage rate of 3 to 40%.

If the flatness is less than 2.5, the space created by twisting will be small and sufficient bulge will not be obtained.

Furthermore, if the flatness is greater than 15, the flat surface will easily break and sufficient tension will not be obtained.

In addition, if the number of twists is less than 3 pieces/10 cm, the effect of the cylinder cannot be obtained and sufficient tension cannot be obtained;
If the number is more than 0 pieces/10 cm, a coil crimp occurs and the effect of the deemed cylinder is lost, and sufficient tension cannot be achieved.

Furthermore, the torsion shrinkage rate has a correlation with the number of twists; a small torsion shrinkage rate means a small number of twists, and a high torsion shrinkage rate means a large number of twists. Therefore, when the torsion contraction and shrinkage ratio are smaller than 3%, that is, when the number of twists is extremely small, it becomes difficult to obtain the effect of the assumed cylinder and it becomes difficult to obtain sufficient tension.

On the other hand, if the torsional shrinkage rate is greater than 40%, coil crimp tends to occur instead of twisting, and the effect of the assumed cylinder is lost, making it difficult to achieve sufficient tension.

In addition, in the mixed fiber yarn of the present invention, it is necessary that the flat twisted fibers and other fibers have fluid entanglement parts of 25 pieces/m or more, so that different types of fibers (filaments) have good interaction with each other. The filaments are entangled with each other to create an appropriate space within the mixed yarn, and the filaments do not come apart, making them easy to handle and making it possible to perform knitting and weaving operations smoothly.

In the intertwined mixed fiber yarn of the present invention, even if the twisted flat filament and other filaments are randomly mixed, or one of the twisted flat filament and the other filament is located in the core part and the other becomes the sheath part. It may be as follows. For example, if the fresh water shrinkage rate of a twisted flat filament is made larger than that of the other filament, and the twisted flat filament is placed in the core and the other filament is placed as a sheath, the twisted flat filament itself creates a space. Bulkyness is further added to the formation and swelling, making it possible to obtain a yarn with large bulk. In particular, it is preferable to set the fresh water shrinkage rate of the twisted flat filament serving as the core portion to 10% or more, and the fresh water shrinkage rate of the other filament serving as the sheath portion to be 5% or less, as this will further add bulge to the differentially shrinkable mixed fiber yarn.

Various synthetic fibers such as polyester, polyamide, acrylic polymer, and polyolefin can be used as the twisted flat fibers, but polyester fibers or composite fibers of polyester and other polymers are preferable, and in particular, the following laminated composite fibers are preferred. Fibers are preferred.

■[η]≧0.6 polyethylene terephthalate (PE
T)/PET whose [η] is 0.1 or more smaller than that■[η
]≧0.75 polybutylene terephthalate (PBT)
/PBT■PET homopolymer with [η] smaller than that by 0.1 or more/PET copolymer■PBT homopolymer/
PBT copolymer ■PET/PBT ■PET/PET and PBT blend■[η] ≧0.6 PET/η, ≦2 nylon 6■[
PET/ethylene-hinyl acetate copolymer with η]≧06 ■
PET copolymer/ethylene-hinyl acetate copolymer In the above description, PET homopolymer and PBT homopolymer refer to those containing less than 5% of other copolymer components. In addition, PET copolymers and PBT copolymers have a content ratio of 3% of other copolymer components (isophthalic acid, adipic acid, cepatic acid, sulfoisophthalic acid, diethylene glycol, neopentyl glycol, 1,4-butanediol, etc.).
~15 mol%. In addition, the copolymerization ratio of ethylene in the above ethylene-vinyl acetate copolymer is 40 to
80 mol% is desirable.

The cross-sectional shape of the twisted flat fiber has the above-mentioned flatness of 2.5-1.
5.0, and any type of material can be used as long as it satisfies the requirements of 3 to 100 twisted pieces/10 cm, but for example, as shown in Figure 1 (
It can have the shapes shown in a) to (c).

Further, the number of other fibers (filaments) to be mixed and entangled with the twisted flat fibers may be one or more. Polymers that make up other fibers include polyester, polyamide,
Any of polyolefins, acrylic polymers, etc. may be used, and among these, polyester is preferred. Other fibers may have a circular cross section or 41 circular (irregular shape)
The fibers may be composite fibers or non-composite fibers.

Furthermore, the interlaced mixed fiber yarn of the present invention may be produced by any method as long as the above-mentioned requirements for the entangled mixed fiber yarn of the present invention are satisfied.

An example of the method for manufacturing the interlaced mixed fiber yarn of the present invention will be explained with reference to FIG.

Each of the twisted flat fibers 1 and other fibers 2 are drawn together through guides 3, 4, and feed rollers 5, and supplied to a fluid entangling nozzle 6 for predetermined entangling, and the entangled mixed fiber yarn is passed through a cold roller. 7 and a sensor 8, and then wound by a spindle winder 9 to produce the interlaced mixed fiber yarn of the present invention.

Next, the present invention will be specifically explained with reference to Examples, but the present invention is not limited thereto.

Example 1 Polyethylene terephthalate with [η] 0.55 and [η]
]0.72 polyethylene terephthalate in the horizontal direction 1
．． By laminating and composite spinning at a ratio of 1:1, an undrawn yarn of 230d124f having the cross-sectional shape shown in FIG. 1(b) was produced. This yarn was drawn under the following conditions to produce a drawn yarn (filament A) of 75 d/24 f.

Stretching conditions 1st heating roller temperature 77°C 2nd heating roller temperature 90'C 30th temperature Room temperature 1st stage stretch ratio 1.9 2nd stage stretch ratio 1.6 Note that filament A was not produced by the above method. Those produced by direct spinning and drawing may also be used.

The drawn yarn A produced above had a flatness of 6.2, a twist shrinkage rate of 5.3%, a twist count of 32 pieces/10 cm, and a clear water shrinkage rate of 21%.

On the other hand, polyethylene terephthalate with [η] 0.65 was spun and wound at a winding speed of 5500 m/min to form a high-speed spun yarn (filament B) of 75 d/48 f with a clean water shrinkage rate of 3.8%. Manufactured.

Filament A and filament B were intertwined by the method shown in FIG. 2 under the following conditions to produce an intertwined mixed fiber yarn of the present invention.

Entanglement conditions Cold roller winding speed 1000m/minute Fluid entanglement nozzle pressure 4.0kg/c 2nd spindle rotation speed 10900-850Orpm As a result of the above, the interlaced mixed fiber yarn consisting of filaments A and filaments B with an entanglement degree of 60 pieces/m. Obtained.

When this intertwined blended yarn was used to make a fabric, a fabric with a soft touch and excellent fullness and tension was obtained.

Example 2 Polyethylene terephthalate with [η] 0.53 and [η
] Polyethylene terephthalate copolymerized with 8 mol % of isophthalic acid of 0.73 is laminated in a ratio of 11 in the transverse direction and composite-spun to form 160 having the cross-sectional shape shown in FIG. 1(b).
An undrawn yarn of d/24 f was produced. This yarn was drawn under the following conditions to produce a drawn yarn (filament A) of 50 d/24 f.

Stretching conditions: 1st heating roller temperature: 78°C 20th temperature: Room temperature stretching Magnification: 3.2 The filament A produced above has a flatness of 8.7 and a torsion shrinkage rate of 8.
．． 0%, number of twisted pieces 10/10cm and fresh water shrinkage rate 2
It was 5%.

On the other hand, polyethylene terephthalate of [η10.65 was spun and wound at a winding speed of 5300 m/min, and a 50d/36f polyethylene terephthalate having a Y cross-sectional shape with a clean water shrinkage rate of 4.2% was prepared.
A yarn with an irregular cross section (filament B) was produced.

Filament A and filament B were intertwined by the method shown in FIG. 2 under the following conditions to produce an intertwined mixed fiber yarn of the present invention.

Entanglement conditions: Cold roller winding speed: 1000m/divided fluid entanglement nozzle pressure: 3.5kg/C0I2 spindle rotation speed: 10700-830Orpm As a result of the above, an entangled mixed yarn consisting of filaments A and filaments B with an entanglement degree of 50 pieces/m was obtained. Ta.

When this intertwined blended yarn was used to make a fabric, a fabric with a soft touch and excellent fullness and tension was obtained.

Comparative Example Polyethylene terephthalate with [η] of 0.53 was spun to produce 160d/24f, which had a dumbbell-shaped cross-sectional shape with a convex portion in the center as shown in FIG. 1(b), but was not composited.
An undrawn yarn was produced. This thread was drawn under the following conditions to produce a drawn thread (filament A) of 50 d/24 f.

Stretching conditions First heating roller temperature 78°C 20th temperature Room temperature stretching Magnification 32 The filament A produced as above has a flatness of 8.7 and a torsion shrinkage rate of O
% and fresh water shrinkage rate was 24%.

On the other hand, polyethylene terephthalate with [η] 0.65 was spun and wound at a winding speed of 5300 m/min to form a 50 d/36 f having a Y cross-sectional shape with a clean water shrinkage rate of 4.2%.
A yarn with an irregular cross section (filament B) is produced.

Filament A and filament B were intertwined by the method shown in FIG. 2 under the following conditions to produce an intertwined mixed fiber yarn of the present invention.

Entanglement conditions Cold roller winding speed 1000 m/minute Fluid entanglement nozzle pressure 3.5 kg/cm2 Spindle rotation speed 1.0700-830 Orpm As a result of the above, an entangled mixed yarn consisting of filaments A and filaments B with an entanglement degree of 50 pieces/m was obtained. I can get it.

When this interlaced blend yarn was used to make a fabric, the fabric lacked fullness and tension.

[Brief explanation of the drawing]

FIG. 1 is a typical cross-sectional view of twisted flat fibers used in the interlaced mixed fiber yarn of the present invention, where the flat fibers are composed of bonded composite fibers. In the figure, L indicates the maximum length of the fiber cross section, and W indicates the maximum thickness of the fiber cross section. FIG. 2 shows an example of a manufacturing method for obtaining the interlaced mixed fiber yarn of the present invention. Applicant Rira Co., Ltd.
Figure 1 (=〕====Hisanto?52)]2law(a) : : (b) (C) Figure 2

Claims (1)

[Scope of Claims] An intertwined mixed fiber yarn in which two or more types of filaments are entangled by fluid entanglement, wherein one type of filament has (a) an oblateness of 2.5 to 15.0, and ( b) Potentially twisted fibers with a twist count of 3 to 100/10 cm in the mixed yarn, and the degree of entanglement of the mixed yarn is 25
An intertwined mixed fiber yarn characterized in that the number of interwoven yarns is at least 1/m.