JPH01132811A - Multileaf-type fiber - Google Patents

Abstract

PURPOSE:To obtain the title novel fiber outstanding in mechanical properties, flexibility, feel and processability, by mutual conjugation at the rectangular sides, of a plural of cyclic primary aggregates radially arranged by alternately superposing two kinds of filmy structural elements consisting of respective two polymers differing from each other. CONSTITUTION:Two kinds of filmy structural elements 1, 2 consisting of respective two polymers differing from each other are alternately superposed and radially arranged followed by conjugation of a plural of the resultant cyclic primary aggregates a, b at their rectangular sides mutually to form a cyclic secondary aggregate, thus obtaining the objective fiber. To produce said fiber, two multilaminar conjugate-type polymer flows are combined at their rectangular sides mutually using the first conjugation plate, and the resulting two combined polymer flows are combined again using the second conjugation plate followed by delivery through the C-type nozzle to carry out spinning.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a novel multilobed fiber. More specifically, it relates to multilobed fibers with excellent mechanical properties, flexibility, feel, and processability.

(Prior Art) As is well known, fibers made of polymers such as polyester and polyamide have excellent physical and chemical properties and are therefore widely used for clothing and non-clothing applications.

In particular, in recent years, as lifestyles have become more sophisticated and diversified, there has been a demand for fiber materials with more advanced and unique performance.

There are many fields where single-component fibers cannot meet these demands, and so-called composite fibers composed of two or more types of polymer components with different properties are now often used.

For example, two types of fiber-forming polymers are combined into a side-pie-side type or a core-sheath type (Japanese Patent Publication No. 51-16
529@ Publication, JP-A No. 60-162862, JP-A No. 57-56518), sea-island type composite fiber in which different types of fiber-forming polymers are arranged in a seabird shape (JP-A No. 4B-Sho.
22126, Japanese Patent Publication No. 46-26895, Japanese Patent Publication No. 46-3815, Japanese Patent Publication No. 54-38215) or split type composite fibers in which different types of fiber-forming polymers are arranged adjacently multiple times -16529, JP-A-60-162862, JP-A-57-
No. 56518, Japanese Unexamined Patent Publication No. 56-53210@publication), etc. have been proposed.

However, the conventionally used side pie
Side-type and core-sheath type composite fibers have very simple fiber shapes, and the texture, function, and mechanical performance of the fabrics obtained with these composite fibers are not necessarily satisfactory.

In addition, sea-island composite fibers are made by dissolving and removing sea components to obtain ultrafine fibers made of island components.Splitable composite fibers are made by dividing composite fibers through physical or chemical treatment to obtain ultrafine fibers. The purpose was to obtain a multifilament, that is, a mixed fiber yarn composed of two or more types of single filaments with different properties.

As described above, conventional composite fibers have complex fiber shapes and do not fully utilize the synergistic effect of multiple components, which is a unique feature of composite fibers.

Therefore, there is still considerable room for improvement in terms of feel, function, and mechanical performance, and there are also many difficulties in processing into fabrics and various processes after making fibers.

(Problems to be Solved by the Invention) The present inventors have arrived at the present invention as a result of intensive studies on multilobed fibers that do not have the above-mentioned drawbacks.

The present invention provides multi-lobed I! with excellent mechanical properties, flexibility, feel, and processability. The purpose is to provide security.

(Means for solving the problems) The present invention has the following configuration. That is, (1) film-like constituent elements consisting of component A and film-like constituent elements consisting of component B are alternately stacked to form annular feature aggregates arranged radially, and a plurality of the annular feature aggregates are It is a multi-lobed fiber characterized by forming an annular secondary aggregate with right-angled sides connected to each other.

FIG. 1 and FIG. 2 are cross-sectional model views showing an example of the multilobed fiber of the present invention.

In the present invention, a "ring-shaped aggregate" means a cross section in which film-like components made of component A and film-like components made of component B are alternately stacked and the film-like components are arranged radially. It is something. A "circular secondary aggregate" is one in which a plurality of annular feature aggregates have a cross section in which their right-angled sides are connected.

Here, the term "right-angled side surface" refers to a side surface that is perpendicular to the longitudinal direction of the film-like components 1 and 2, that is, a side surface that is perpendicular to the joint surface of the film-like components.

In FIG. 1, a and b are annular feature aggregates, and have a two-layer structure in which a and b are combined. 3 indicates a portion where the right-angled side surfaces of the annular feature aggregate are connected.

FIG. 2 is an example in which a four-unit arrangement of ring-shaped feature aggregates is combined. 3 indicates a portion where the right-angled side surfaces of the annular feature aggregate are connected.

The characteristics of the multilobed fiber of the present invention are that, in its cross-sectional shape, (1) film-like components made of different types of polymers are joined alternately and form an annular feature aggregate arranged radially; (2) a plurality of The annular feature aggregates are joined at right angle sides to form an annular secondary aggregate.

By combining a plurality of annular feature aggregates with each other at right angles to form an annular secondary aggregate, a special and highly irregular cross section in which annular feature aggregates are arranged radially and in multiples in that unit is created. It can have a planar shape. Therefore, the multilobed fiber of the present invention has a spun-like feel and feel, and also has good flexibility and elasticity.

Furthermore, at the joint between the annular and aggregate, multiple components intermingle and the polymer of one of the components continues at the joint to form a spine-like shape, and this part connects the composite components. Since it plays a role as the core of the fiber, it can give the fiber shape excellent workability and favorable mechanical performance.

More specifically, the number of stacked film-like components in the annular assembly is at least 6, preferably 10 or more, particularly preferably 20 or more. In some cases, the number may exceed 1000. Also, the number of sheets can only be different for each ring-shaped collection.

When this number increases, the thickness of the film-like components becomes thinner, and depending on the combination of polymers, the bond between the film-like components can be made stronger.

The shape of the joint in the annular secondary aggregate is not limited at all. That is, it may be circular, oval, or meandering.

Further, the number of annular aggregates in the annular secondary aggregate is not particularly limited, and is determined depending on the use and purpose. For example, FIG. 1 shows two units of ring-shaped aggregates combined, and FIG. 2 shows four units of ring-shaped aggregates combined. Of course, it may be more than that.

The ratio of composite components is A/B = 99/1 to 1/9 by weight.
9, preferably A/B=9515 to 5/95.

Depending on the combination of polymer components, unevenness may appear on the fiber surface due to differences in shrinkage, solubility, or degradability between the polymers, and the present invention also includes fibers with this shape. In this case, it is possible to impart properties such as natural fiber-like squeaking and crispness.

The ratio of the length of the long side (m>) to the short side (n> of the film-like component (m/n> is not particularly limited, but is at least 2
or more, preferably 5 or more, and may exceed 50 in some cases.

The polymers used in the present invention are polymer types commonly used for fiberization, such as polyester, polyamide, polyacrylonitrile, polyethylene, polypropylene, polyurethane, acetate, etc., and their copolymers. Two types of polymers are selected depending on the application.

In general, as mentioned above, the multilobed fibers of the present invention, due to their unique cross-sectional shape, can be used in combination with the above-mentioned polymer groups, even though polymers that have been thought to be difficult to use due to practical problems when used alone. By using them in combination, performance that takes advantage of the characteristics of the polymer can be obtained due to their synergistic effect.

For example, polyarylate, high polymerization degree polyethylene, etc. are used for high strength, polyamide elastomer, polyester elastomer, polyurethane elastomer, fluororubber, etc. are used for flexibility, polyvinyl alcohol, various polymers incorporating ionic groups, etc. are used for water absorption. For imparting antistatic properties, polyoxyethylene, polymers containing carbon particles, polymers containing conductive metal compounds, etc. For increasing specific gravity, polymers containing high specific gravity metals such as zinc, barium, titanium, antimony, lead, etc. and their compounds, etc. For imparting heat resistance and chemical resistance, use polyphenyl sulfide, etc. For imparting flame retardancy, biocompatibility, and oil resistance, use polyphosph-7zene, etc. For imparting high color development, use polymers containing colorants, highly color forming polymers, etc. . It is possible to use a material depending on the specific purpose by mixing it into the polymer in a larger amount than is normally used.

In this way, the fiber of the present invention has a combination of polymers,
It is possible to select from an extremely wide range of performance that has not been available before, and it is also possible to significantly improve the performance of the fiber.

The thickness of the fibers is not particularly limited. Further, this fiber can be mixed with a fineness mix, a heat shrinkage mix, or other fibers, and can be used as a so-called processed yarn in which the fibers are subjected to a false twisting process to impart stretchability and bulk. The multilobed fibers of the present invention can also be used to make fabrics such as woven fabrics, knitted fabrics, and nonwoven fabrics, or composites thereof.

In addition, the multilobed fiber of the present invention may be in the form of a single fiber in which multiple components are integrated, or it may be in a form in which the part facing the outside is split by subjecting it to split I treatment. It does not matter if it includes.

Although the present invention does not in any way question the means for producing such fibers, examples of preferably producing such fibers will be described below.

In order to obtain the multilobed fiber of the present invention shown in FIG.
A multilayer bonded composite polymer flow in which two types of polymers with different properties are alternately bonded repeatedly in a spinning pack is created by a conventionally known method of spinning 1q of multilayer bonded composite fibers. Next, by using a binding plate, the polymer flows are merged so that the two multilayer bonded composite polymer flows (annular-collection aggregate) are joined at right angle sides, and this is discharged from a C-shaped nozzle mouthpiece and spun. can get.

The multilobed l! of the present invention shown in FIG. To obtain the fiber, first, two multilayer bonded composite polymer flows are joined at right angle sides using a first joining plate, and then two of these polymer flows are roughly joined in series using a second joining plate. , C
It is obtained by discharging it from a mold nozzle and spinning it.

The multilobed fiber of the present invention can be used in a wide range of fields, including clothing and non-clothing. For example, for clothing, there are underwear, underwear, blouses, stockings, winter clothing, sportswear, casual wear, swimsuits, leotards, shirts, etc., and for non-clothing, futon cotton, artificial hair, ink ribbons, bandages, etc. products, towels, wiping cloths, puffs, various filters, tire cords, ropes, fishing nets, etc.

(Examples) Hereinafter, the present invention will be explained in detail with reference to Examples, but the present invention is not limited to these Examples in any way. Please note that unless otherwise specified, all "percentages" are based on mutual agreement.

Example 1 16 rows of fluid mixers in which six fluid alternating array elements of the same type as those described in Japanese Patent Publication No. 1048/1988 were connected in the vertical direction;
Using a spinning pack that incorporates a C-shaped nozzle and a coupling plate that combines the fluids discharged from the two rows of the fluid mixer in its lower part, polyethylene terephthalate is used as the A component, and polyarylate (wholly aromatic) is used as the B component. A composite fiber made of polyester was melt-spun.

The cross-sectional shape of the obtained fibers is such that A and B are alternately 50 to 6
It was a multilayer bonded type in which 5 pairs were repeatedly bonded, and further, the fibers were bonded at right angles to each other to form an annular composite fiber.

That is, the radial multilayer junction type is arranged in two layers in a ring shape,
The boundaries were combined. The spinning conditions at this time were a temperature of 320° C., a take-up speed of 1000 m/min, a number of filaments of 8, and a component ratio A/B of 70/30.

Subsequently, this composite fiber was subjected to a dry heat treatment of 200'C1 for about 20 hours, and further compounded to form a filament rIi24.
．． It was made of 75 denier thread.

The obtained yarn had a tenacity of 14.1 C1/d, which was almost double the strength of a normal polyester yarn of the same denier, which had a strong cuff of 2 g/d. Moreover, when this yarn was used to make woven and nonwoven fabrics, the fabrics were extremely strong.

Embodiment 2 Sixteen rows of fluid mixers in which six fluid alternating array elements of the same type as those described in Japanese Patent Publication No. 1048/1988 are connected in the vertical direction,
Using a spinning pack incorporating a C-type nozzle orifice and a coupling plate that combines the fluids discharged from the two rows of the fluid mixer in its lower part, a polycapsule containing 45 wt% of polyoxyethylene segments with molecules fl14000 as the A component was used. A composite fiber consisting of a lactam polyether block copolymer and nylon 6 as the B component was melt-spun.

The cross-sectional shape of the obtained Ilt is such that A and B are alternately 50~
It was a multi-layer bonded type in which 65 pairs were repeatedly bonded, roughly bonded at right angle sides, and formed into a ring shape, making it a composite product of $841. That is, it was a composite fiber in which two layers of tli-radial type multilayer bonded fibers were arranged in an annular shape and their boundaries were bonded. The spinning conditions at this time were a temperature of 270°C and a take-up speed of 1200 m/min.
The number of filaments was 8, and the component ratio A/B was 20/80.

Subsequently, the yarn was drawn at a drawing speed of 400 m/min, a hot plate temperature of 120° C., and a draw ratio of 3.2, and then the yarns were doubled to obtain a drawn yarn of 24 denier and 8 filaments. This drawn yarn was twisted at 150 T/m as a warp yarn and 100 T/m as a weft yarn to weave a plain woven fabric with a weave density of 112 yarns/inch in the warp and 105 yarns/inch in the weft.

This fabric was immersed in a 98° C. treatment solution containing a surfactant for relaxing scouring, and then subjected to a dry heat treatment at 160° C. for 1 minute.

The obtained fabric was dyed dark blue by a conventional method.

The dyed fabric had excellent electrostatic properties with a frictional charging voltage of 990V. Moreover, it had a span-like feel and texture.

Embodiment 3 Sixteen rows of fluid mixers in which six fluid alternating array elements of the same type as those described in Japanese Patent Publication No. 1048/1988 are connected in the vertical direction,
Using a spinning pack that incorporates a C-shaped nozzle and a coupling plate that combines the fluids discharged from the two rows of the fluid mixer in its lower part, nylon 6 is used as the A component, and polyphosphazene (Nippon Soda Co., Ltd.) is used as the B component. ) manufactured by PLP-210
A composite fiber consisting of > was melt-spun.

The cross-sectional shape of the obtained fibers is such that A and B are alternately 50 to 6
It was a multi-layer bonded type in which five pairs were repeatedly bonded, and the two layers were bonded at right angle sides to form a ring-shaped composite fiber. That is, the radial multilayer junction type was arranged in two layers in an annular shape.

The spinning conditions at this time were a temperature of 280°C and a take-up speed of 1200°C.
m/min, number of filaments 8, component ratio A/B-70/30
And so. Subsequently, stretching was performed at a stretching speed of 400 m/min, a hot plate temperature of 120°C, and a stretching ratio of 2°8.
It was made into a drawn yarn of denier and 8 filaments.

While doubling this drawn yarn, the warp yarn is 150T/
The weft yarn was twisted at 100 T/m, and a plain woven fabric with a weave density of 125 yarns/inch in the vertical direction and 120 yarns/inch in the horizontal direction was woven.

This fabric was immersed in a treatment solution containing a surfactant at 9.degree. C. and 8.degree. C. for relaxing scouring, and was also subjected to dry heat treatment at 160.degree. C. for 1 minute.

The obtained fabric exhibited flame retardancy to the extent that it had self-extinguishing properties. Moreover, it had excellent flexibility and elasticity.

(Effect of the invention) The multilobed fiber of the present invention has the following effects.

■Since the film-like components are stacked in multiple layers and are arranged in a radial shape in multiple layers, it has a spun-like feel and texture as well as good flexibility and elasticity.

(2) Since the bonding part of the annular-order aggregate firmly connects the components, the shape of the fiber is hard to collapse and the processability is extremely good.

Furthermore, due to the special shape of the fibers of the present invention, polymers that have hitherto been thought to be difficult to use due to practical problems can be used by combining them with other polymers. Therefore, by selecting a polymer according to the purpose and application, we aim to achieve high strength, water absorption, water retention, flexibility, flame retardancy, bulk, high specific gravity, electrostatic properties, etc. You can also choose from a wide range of performance options.

[Brief explanation of the drawing]

FIGS. 1 and 2 are cross-sectional model diagrams showing an example of the multilobed fiber of the present invention. a, b: Annular-feature aggregate 1.2: Film-like component 3: Part of the annular-feature aggregate connected back to back at right angle sides Patent applicant Toshi Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] (1) A film-like component consisting of component A and a film-like component consisting of component B are alternately stacked to form an annular primary aggregate arranged radially, and a plurality of the annular primary aggregates are arranged at right angles to each other. A multilobed fiber characterized by forming an annular secondary aggregate whose sides are joined together.