JPS58180616A - Preparation of sliver and yarn from synthetic fiber - Google Patents

Abstract

PURPOSE:To obtain slivers with little variation in thickness in a simplified apparatus, by dividing a bundle of continuous filaments into small bundles, and cutting the respective bundles at cutting positions shifted in the long direction thereof. CONSTITUTION:Continuous synthetic fibers, e.g. monofilaments, multifilaments or slit films, are bundled, and the resultant fibrous bundle 4 is divided into small bundles and cut at cutting positions shifted respectively for the small bundles. The cutting positions can be shifted by providing cutting blades 2, 2,... divided in the axial direction of a rotating drum 1 on the periphery thereof for cutting at a given interval, and feeding the bundle 4 to the gap between the rotating drum 1 and a drum 3 in the pressure contact with the rotating drum 1 while spreading the fibrous bundle 4 to the full width of the rotating drum 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for making slivers or yarns from Fi continuous synthetic fibers.

Synthetic fibers are also used as long fibers (filaments), but they are also often used alone as fibers or mixed with other chemical or natural fibers to make yarn. Although many methods are known, the h-method IIi, which has been commonly used in the past, is an example of the following method.

A polymer that serves as a synthetic fiber raw material is spun by melt spinning, wet spinning, dry spinning, etc., and drawn to obtain a monofilament. The monofilament is crimped or curled to give it creep properties, and the filaments are made into bundles, which are then cut to a certain length. Next, this fixed length of filament is passed through a spinning (sliver) machine to obtain a sliver (II) in the same way as the normal natural fiber sliver manufacturing method. How many times is this sliver drafted? , Twisting to make yarn 〇 However, the above-mentioned method company cut the bundle of monofilament to a certain length, then passed it through a sliver machine K to obtain a sliver T-, which required a large number of steps and was time-consuming. Of course, there was also the issue that variations in thickness made the papermaking equipment complicated.

Compared to the conventional method described in the present invention, the number of steps can be significantly reduced, and the equipment itself can be simplified.
Another object of the present invention is to provide a method for producing synthetic fiber slivers and yarns with uniform thickness.

The method branch of the present invention is characterized in that continuous composite lines at are focused, and the resulting focused blade is cut while shifting the cutting position in the length direction Qζ for each small bundle of the focused material to produce a sliver. It is O.

Synthetic fibers that can be used for painting by the method of the present invention include monofilament, multifilament, and synthetic resin film.
A slit (hereinafter referred to as a slit film) obtained by tearing the film long. Next, the method of the present invention will be explained in more detail using a synthetic fiber monofilament as an example.

Synthetic fiber monofilaments such as polyester and polypropylene can be used directly! It is obtained as a bundle by the so-called melt spinning method, in which the melt is extruded through a spinneret having a large number of holes and simultaneously subjected to vc stretching. In addition, synthetic fiber monofilament (hereinafter simply referred to as monofilament) can also be produced by wet spinning method or dry spinning method.
can be made.

The obtained monofilament is subjected to a curling process using a chryso7Fjg process. This crimping and curling process gives the monofilament a curl to prevent shrinkage.
This is done to improve the entanglement of the monofilament bundle.

However, this step can also be omitted.Next, the monofilament bundle is cut into a certain fiber length. At this time, in the past, the entire monofilament constituting the bundle was cut at the same time so that the bundle had a constant q) Mk.However, in the method of the present invention, the cutting position is determined for each small bundle of the bundle. Cut by shifting in the direction of stretching. To shift the cut position Ill in small bundles, for example, the first fist! As shown in the figure, when the rotary cutting drum l having a predetermined diameter t and diameter I is cut, the cutting S is cut without being divided in the axial direction of the drum.
2, 2... are provided at regular intervals in the circumferential direction, and while the monofilament bundle is hooked onto this drum and rotated, the entire monofilament bundle is cut and removed. Materials O/Elementary 1
It is necessary to provide a drum lh so that the bundle can be cut one after the other and the entire monofilament bundle passing through the drum l can be cut to a constant length. The installation interval in the circumferential direction and axial direction on the outer surface of the rotating drum with J shear force is selected as appropriate, but for example, the diameter is 33 c.
m (F1a Mk 100 cm), using a rotary drum with an axial width of I cm, to apply a K force of about 100 cm to a monofilament (J" J) J (111 g 30 mm) with a length of about 100 cm. , 1m JJ
mm cutting blades were shifted every 10 cm in the width around the chip and every 300 mm in the axial direction.
Make sure it is fixed.

As mentioned above, when a monofilament bundle is passed through the rotary drum 1 equipped with 11 cutters 2.2..., the length of the monofilament bundle q-@o, and the small The cut position of each bundle is shifted and the monofilament bundle is cut in a soil-like field.The monofilament bundle, which has been cut into small bundles to an appropriate length, is placed opposite the outlet of the rotary cutting driver and It is drawn out by R-1- to form a sliver.

However, the monofilament may be cut by passing it directly through the drum 1F shown in FIG.
As shown in FIG. 2, a drum 3 having a cutting blade 2 and a drum 3 without a cutting blade is arranged in a direction opposite to each other, and a monofilament bundle 4 is hooked to the drum 3 to be rotated, and at the same time Rotating drum 16r) Monofilament collection l1Il with cutting blade 2! F4 may be cut into small bundles.

The superior sliver is drafted several times in a conventional manner and twisted into yarn according to the conventional method of the III company from a zero swiver to a yarn.

In the method of the present invention, as described above, the seven instruments focus v
Since the force is applied so that the entire cutting position is equal to Jks and the length is a certain length, a sliver can be produced after cutting. Therefore, the process of passing the sliver through a sliver machine as in conventional method C7 is omitted, thereby simplifying the process and shortening the manufacturing time.

Synthetic fiber raw material polymers that can be used in the method of the present invention include:
For example, polyamide, polyester, polyolefin, and other synthetic fibers are preferred. Particularly preferred are butterfly, polyolein, polyethylene, polypropylene, and the like.

In addition to the above-mentioned synthetic fiber monofilament, the method of the present invention is also applicable to multifilament made by collecting single fibers that are thinner than C monofilament. In the case of multifilament, the shape of the cutting rotating drum is made smaller, and the mounting position of the cutting #r blade is changed as appropriate.In addition, the method of the present invention can be similarly applied to slit films. ◇Slit Film Co., Ltd.
Go<m<@! The slivers are made into slits and the slits are collected and passed over the rotating drum to obtain a sliver. The size of the toten drum for cutting and the size of the cutting H will be changed as appropriate depending on the type of pickpocket used, the type of tofu film, the slit width, etc. In addition to the above, in addition to the above, there are Depending on the situation, other fibers, such as natural fibers such as linen, may be mixed in, and other fibers such as shelving fibers may be mixed in. These fibers may be cut or uncut. It is not necessary to perform a bending, crimping, or curling process.

As is clear from the above, the method of the present invention is superior to the conventional method in terms of construction. can be omitted, so
It is economical and has the advantage of shortening manufacturing time.

[Brief explanation of the drawing]

@Figure 1 shows the slope m of the rotating drum for cutting used in the method of the present invention.
tm. FIG. 2 is a schematic diagram illustrating how the monofilament bundle is cut in the present invention. In the figure, 1, 3... Rotating drum, 2... Cutting blade 4...
Monofilament bundle patent Applicant: Kaneya Tsuna Co., Ltd. Fang 1

Claims (1)

[Claims] (1) Continuous synthetic fibers such as monofilament, multifilament, slit film, etc. are bundled, the resulting bundle is divided into several small bundles, and the cutting position of each bundle is shifted in the length direction. Synthetic fiber slivers and yarns that are cut into slivers [manufacturing method].