JPS61102437A - Composite spun 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 is characterized in that the filament fineness is 0 in any yarn cross section.
．． It consists of a multifilament made of filaments having a diameter of 1 to 6.0 denier and staple fibers, and there are parts where the multifilaments and staple fibers are arranged almost evenly in the thread cross section and parts where they are arranged unevenly, and the length of the thread is Concerning a composite spun yarn characterized by 8-twist parts and 2-twist parts being distributed alternately along the width direction and a method for producing the same ◎ (Prior art) Composite spun yarn consisting of conventional multifilament and staple fibers There are so-called core yarns in which multifilaments are wrapped around staple fibers in a core yarn, and the whole is bundled by twisting, and natural fibers and multifilaments are yarns that are almost evenly distributed in both the cross-sectional and longitudinal directions. It is placed in
-Refer to Publication No. 16825.” These composite spun yarns are used for various purposes due to their characteristics different from those of natural fiber spun yarns and multifilament yarns, but the former has problems with coverage, while the latter has problems with uniformly opening the rutifilament. Multifilament must be untwisted as it needs to be mixed with natural fibers.
Furthermore, since the yarn is twisted, there are various constraints such as slow production speed, and the product price is also high.

(Problems to be Solved by the Invention) In view of the above facts, an object of the present invention is to provide a composite spun yarn and a method for producing the same that do not have the various drawbacks of conventional composite spun yarns.

(Means for Solving the Problems) The present invention has a filament fineness of 0 in any yarn cross section.
．． Consisting of filaments or curling multifilaments of 1 to 5.0 deniers and stable fibers, the staple fibers account for ~80% by weight of the whole, and the filaments and stable fibers are almost equal to each other in the cross section of the yarn. Composite spun yarn and number of twists, characterized in that there are portions arranged evenly and portions arranged unevenly, and S twist portions and Z twist portions are alternately distributed along the length direction of the yarn. 8~
A multifilament in the range of 20 T/M is opened, twisted with a fleece-like stable fiber group at a ratio of 20 to 80% by weight to 80 to 20% by weight, and then false twisted and composited. This is a method for producing a composite spun yarn. The present invention will be explained below with reference to the drawings.

In the present invention, the filament fineness of the multifilament is preferably 0.1 to 5.0 denier, preferably 1 to 5 denier, and more preferably 0.5 to 2.0 denier, but if it exceeds 5 denier, the fabric obtained will be hard. On the other hand, it becomes 0. ] This is because it is too soft if it is less than a denier. In the present invention, the number of filaments constituting the multifilament depends on the denier of the composite spun yarn, but it is preferable that the number of filaments is 10 or more so that the binding with the staple fibers is sufficient.

Furthermore, if the number of staple fibers in a given yarn cross section is less than 0.5 times the number of filaments in the multifilament, the texture of the staple fibers will not be utilized, and if it exceeds 5 times, the form of the composite yarn will be unstable. Therefore, in the composite spun yarn of the present invention, the ratio between the number of staple fibers and the number of multifilament filaments is 0.
It is preferably limited to 5 to 5 times. The staple fibers account for 20 to 80% by weight, preferably 30 to 70% by weight of the entire system. This is to synergistically enhance the texture of both staple fibers and filaments. This is because when the weight is less than 20% by weight, it becomes filament-like, and when it exceeds 80% by weight, it becomes stable-like. Next, the reason why the filaments and staple fibers have portions arranged almost uniformly and portions arranged unevenly in the yarn cross section is to improve the appearance of the yarn.

As with conventional composite spun yarns, if the fibers are scattered in the longitudinal direction of the yarn, streak-like defects tend to occur when the yarn is made into a fabric, but as with the composite spun yarn of the present invention, for example,
As shown in the figure, the part that is positively arranged almost evenly in the length direction of the thread ((a) in the same figure) and the part that is arranged unevenly ((a) in the same figure)
If b))) are arranged alternately, such defects will not be noticeable.

In the same figure, F stands for filament and BT stands for staple fiber. FIG. 2 is a side view of the composite spun yarn of the present invention. In the figure, it is preferable that the period l be short, but if it is too short, the yarn form will become unstable. l Q l1llll-l Q
Q m , more preferably 20III to 5011
It is. Note that A represents the twist reversal portion, Z represents the Z twist portion, and S represents the S twist portion.

Next, alternately distributing the S-twist portion and the Z-twist portion along the length of the yarn migrates the arrangement of the multifilament and staple fibers in the length direction of the yarn as described above, and maintains the yarn form. This is to make it happen.

Furthermore, the purpose is to lower the torque so that it can be used without a car.

Therefore, the number of twists is an important factor for maintaining the shape of the yarn, and generally the higher the number of twists, the better the shape stability.

Also, the texture of the fabric varies depending on the number of twists. f = 7 (T/M)
W degrees are preferably employed. The number of twists mentioned here refers to the average number of twists between the twist reversal portions A-A, and D is the denier of the composite yarn.

Next, polyester fibers, polyamide fibers, and promix fibers are preferably used as the multifilament due to the performance of the composite spun yarn obtained, and natural fibers such as cotton, wool, and hemp are preferably used as the staple ma.

Next, a method for obtaining the composite spun yarn of the present invention will be described. Of course, it goes without saying that the method described below cannot be used if it takes the form of the composite spun yarn of the present invention. First, in order to have parts where the multifilament and staple fibers are arranged unevenly in the length direction of the yarn and parts where they are arranged evenly, when opening the multifilament and overlapping it with the staple fiber, for example, the number of twists of the multifilament is 8 to 8. When it is 20 T/M, the fiber opening state differs in the length direction due to the convergence of the twist, and converged portions and spread portions appear alternately. Here, when the number of twists exceeds 20 T/M, the occurrence of knots increases rapidly, while when the number of twists is less than 8 T/M, almost no knots occur.

Next, as a method for alternately distributing S-twist portions and Z-twist portions along the length direction of the yarn, for example, a belt false twist method is constructed of two endless belts and passes the yarn through the intersecting plane of both running belts. An air false twisting method that utilizes a swirling flow of air is also used, but in view of heating efficiency, a belt method is preferable in order to produce composite spun yarn at a high speed of 100 mm per minute or more.

The method for producing the composite spun yarn of the present invention will be briefly explained below with reference to FIG. In FIG. 3, the multifilament MF is unwound from the package 1 and the guide 2.3.4
At the same time, the rovings R are unwound from the Shinomaki 2 and fed to the feed roller 6, where they are overlapped and then false-twisted by a false-twisting device F. It passes through a delivery roller 8 and is wound up into a package 10 by a winding device 9. In addition, 11
is the guide, 12 is the trumpet, 13 is the power supply, 14.1
5 is the ground, 16 is the back roller, and 17 is the second roller.

(Example) Examples 1-2, Comparative Examples 1-3 Polyester multifilament yarn (5Oa/24f
At the same time, the cotton roving (180 gelen/307 (is
) are supplied to the feed roller while being drafted 43 times, and when they are overlapped, the intersection angle is 180° and the contact pressure is 1009.
After heating with a belt false twisting device running at a surface speed of 400 I11/min, it was wound up via a delivery roller rotating at a surface speed of 145 I11/min to spin 38'8 (Implemented) Example 1). Note that a fluid false twisting nozzle (fluid pressure 3.2~G
) was used to produce a similar yarn (Example 2). On this occasion,
In Example 2, the yarn twist was changed to OT/M (Comparative Example 1)
. Further, multifilament yarns with original yarn twists of l 2 T/M and OT/M were opened in the same manner, overlapped with cotton fiber fleece, and fed to a feed roller at a surface speed of 10 m/min. A 38's spun yarn was produced by winding it with a spindle rotating at ooo- (Comparative Example, 2.
3). When the yarns obtained were analyzed, the results shown in the table were obtained.

The obtained composite spun yarn has areas where polyester filaments and cotton fibers are arranged evenly and areas where they are unevenly arranged alternately in the yarn cross section (see Figure 1), and S along the length direction of the yarn. A new composite spun yarn was obtained in which twisted parts and two-twisted parts were distributed alternately (see Figure 2).

(Effects of the invention) The composite spun yarn of the present invention has a low torque, so it can be used without carrying, the yarn form is stable, and it can be used as a single yarn.Moreover, the texture is soft, and there is no problem as a warp for W JL. As a new type of composite yarn, it has excellent properties that can be used in many fields, and it has the remarkable effect of being able to be produced at high speed.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the composite spun yarn of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a perspective view of an apparatus for carrying out the manufacturing method. ? ... Filament, S... Staple fiber S... S twisting section, 2... Z twisting section, A... Twisting reversal section 5... Spreading device, 6
... Feed roller, 7. False twisting device, 8. Delivery roller.

Claims (2)

[Claims] (1) A composite spun yarn consisting of staple fibers and filaments with a fineness of 0.1 to 5.0 deniers, in which the staple fibers account for 20 to 80% by weight of the whole and are evenly arranged in the cross section of the yarn. The composite yarn is characterized in that skewed portions and offset portions are alternately distributed in the longitudinal direction of the yarn, and S-twisted portions and Z-twisted portions are alternately distributed in the longitudinal direction of the yarn. Spun yarn. (2) Multifilament with a twist number in the range of 8 to 20 T/M is opened, and a fleece-like staple fiber group and 20
A method for producing a composite spun yarn, which comprises stacking the yarn at a ratio of ~80% by weight to 80 to 20% by weight, and then applying false twist to the composite.