JPH073001B2 - Multileaf fiber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a novel multi-leaf fiber. More specifically, the present invention relates to a multilobe fiber having 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.

In particular, recently, with the advancement and diversification of life, there has been a demand for a fiber material having higher and individual performance.
In many fields, a single component fiber cannot meet the demand, and it has become common to use a so-called composite fiber composed of two or more polymer components having different properties.

For example, two kinds of fiber-forming polymers compounded in a side-by-side type or a core-sheath type (Japanese Patent Publication No. 51-16529, Japanese Patent Publication No. 60-162862, Japanese Patent Publication No. 57-56518). Japanese Patent Publication No. 48-22126, Japanese Patent Publication No. 46-268).
No. 95, Japanese Patent Publication No. 46-3815, Japanese Patent Publication No. 54-38215) or split type composite fibers in which different kinds of fiber-forming polymers are arranged adjacent to each other a plurality of times (Japanese Patent Publication No. 51-16529, Japanese Patent Publication No. Sho. 60-162862 JP, JP 57-56518 JP, JP 56-
No. 53210) is proposed.

However, the side-by-
The side-type and core-sheath type conjugate fibers are extremely simple in fiber shape, and the texture, function, or mechanical performance of the cloth obtained from the conjugate fibers are not always satisfactory.

Further, the sea-island type composite fiber is for the purpose of dissolving and removing the sea component to obtain an ultrafine fiber composed of the island component, and the splittable type composite fiber is obtained by dividing the conjugate fiber by a physical or chemical treatment to obtain an ultrafine fiber. The purpose was to obtain a multifilament composed of two or more kinds of single filaments having different properties, that is, a mixed fiber system.

As described above, the conventional conjugate fiber has a complicated fiber shape and does not fully utilize the synergistic effect of a plurality of components, which is a characteristic feature of the conjugate fiber.

Therefore, there is still room for considerable improvement in terms of texture, function, or mechanical performance, and there are many difficulties in forming a fabric after being made into fibers or in processability in various steps.

(Problems to be Solved by the Invention) The present inventors have arrived at the present invention as a result of earnestly examining a multilobe fiber that does not have the above-mentioned drawbacks.

It is an object of the present invention to provide multilobe fibers having excellent mechanical properties, flexibility, feel and processability.

(Means for Solving Problems) The present invention has the following configurations. That is, (1) a film-shaped component composed of the component A and a film-shaped component composed of the component B are alternately stacked to form a radial primary assembly, and a plurality of the cyclic primary assemblies are formed. It is a multi-lobed fiber characterized by forming an annular secondary assembly in which right-angled side surfaces are connected to each other.

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

In the present invention, the "annular primary assembly" has a cross section in which film-like constituents composed of the component A and film-like constituents composed of the component B are alternately stacked, and the film-shaped constituents are radially arranged. It is a thing. The “annular secondary assembly” is one in which a plurality of annular primary assemblies have a cross section in which their right-angled side faces are connected to each other.

Here, the “right-angle side surface” means a side surface perpendicular to the longitudinal direction of the film-shaped components 1 and 2, that is, a side surface perpendicular to the joint surface of the film-shaped components.

In FIG. 1, a and b are cyclic primary aggregates and have a two-layer structure in which a and b are bonded. Reference numeral 3 denotes a portion in which the right-angled side faces of the annular primary aggregate are joined together.

FIG. 2 shows an example in which the annular primary aggregates are connected in four unit arrays. Reference numeral 3 denotes a portion in which the right-angled side faces of the annular primary aggregate are joined together.

The feature of the multileaf fiber of the present invention is that, in its cross-sectional shape, film-like constituent elements made of different polymers are alternately joined, and form a ring-shaped primary aggregate that is radially arranged, and a plurality of ring-shaped primary That is, the aggregates are connected to each other at right-angled side faces to form an annular secondary aggregate.

A plurality of annular primary aggregates are joined at their right-angled side faces to form an annular secondary aggregate, so that the circular primary aggregates are arranged in radial and multiple units in a special and highly irregular crossing. It can be a surface shape. Therefore, the multileaf fiber of the present invention has a span-like feel and feel, and further has good flexibility and elasticity.

Furthermore, the connecting portion between the annular primary aggregates is a fiber in which a plurality of components intermingle and a polymer of one of the components forms a continuous spine-like shape at the connecting portion, and this portion connects the composite components. Since it plays a role as a core of the fiber, it is possible to prevent the shape of the fiber from collapsing and to give the fiber excellent workability and preferable mechanical performance.

More specifically, the number of superposed film-like constituents in the annular primary assembly is at least 6 or more, preferably 10 or more, particularly preferably 20 or more.
In some cases, it may exceed 1000. Further, this number may be different for each annular primary aggregate.

If this number is increased, the thickness of the film-shaped component becomes thin, and depending on the combination of polymers, the bonding between the film-shaped 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 or elliptical, or may be meandering.

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

The ratio of the composite components is A / B = 99/1 to 1/99 by weight ratio,
It is preferably used with A / B = 95/5 to 5/95.

Depending on the combination of polymer components, unevenness may appear on the fiber surface due to the difference in shrinkability, solubility or decomposability between polymers, but the present invention also includes those having this shape. In this case, properties such as natural fiber-like creases and sharpness can be imparted.

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

The polymer used in the present invention is a polymer type usually used for fiberizing polyester, polyamide, polyacrylonitrile, polyethylene, polypropylene, polyurethane, acetate and the like, and copolymers thereof. , Two types of polymers are selected according to the application.

Further, the multilobe fiber of the present invention, due to its peculiar cross-sectional shape as described above, is also ligated with the above-mentioned polymer group even for polymers which have been practically problematic and difficult to use by themselves. When used in, it is possible to obtain the performance utilizing the characteristics of the polymer due to the synergistic effect.

For example, polyarylate, highly polymerized polyethylene, etc. for high strength, polyamide elastomer, polyester elastomer, polyurethane elastomer, fluororubber, etc. for softening, polyvinyl alcohol for imparting water absorption, various polymers incorporating ionic groups, etc. , Polyoxyethylene, carbon particle-containing polymer, conductive metal compound-containing polymer, etc. for imparting antistatic property, zinc, barium, titanium, antimony, lead and other high specific gravity metal and its compound-containing polymer, etc. for high specific gravity, Polyphenyl sulfide, etc. for imparting heat resistance and chemical resistance, polyphosphazene, etc. for imparting flame retardance, biocompatibility, oil resistance, etc., and colorant-containing polymers, high color-forming polymers, etc. for imparting high color development. . It is also possible to use a material depending on the purpose by mixing it in the polymer in an amount larger than the usual amount used.

In this way, the fiber of the present invention is a combination of polymers,
It is possible to select an extremely wide range of performance that has never been obtained, and it is possible to significantly improve the performance of the fiber.

The thickness of the fiber is not particularly limited. Further, this fiber can also be used as a so-called processed yarn having a fineness mix, a heat shrinkage mix, or a mixture with other fibers, and further subjected to false twisting to impart stretchability and bulkiness. Further, the multileaf fiber of the present invention can be used as a woven fabric, a knitted fabric, a fabric such as a non-woven fabric, or a composite thereof.

Furthermore, the multi-leaf fiber of the present invention includes a form in which a plurality of components in a single fiber are integrated, or a splitting treatment is performed to split the portion facing the outside. It doesn't matter.

The present invention does not ask any means for producing such fibers, but an example of producing such fibers preferably will be described below.

In order to obtain the leaflet-like fibers of the present invention shown in FIG. 1, first,
A conventionally known method for obtaining a multilayer-bonded composite fiber produces a multilayer-bonded composite polymer flow in which two kinds of polymers having different properties are alternately and repeatedly bonded in a spinning pack. Then, using a connecting plate, two multi-layered composite polymer flows (annular primary aggregates) are combined so that they are connected at right-angled side faces, and the polymer flows are discharged from a C-type nozzle spinneret and spun. To be

To obtain the leaflet-like fibers of the present invention shown in FIG. 2, first,
Two multi-layered composite polymer streams are merged at right-angled sides using a first coupling plate, two of these polymer streams are further merged in series by a second coupling plate, and then discharged from a C-shaped nozzle for spinning. It is obtained by doing.

The multileaf fiber of the present invention can be used in a wide range of fields for clothing and non-clothing. For example, for clothing, underwear, underwear, blouse, stockings, winter clothes, sportswear, casual wear, swimwear, leotards, shirts, etc.For non-clothing, futon cotton, artificial hair, ink ribbon, bandages. These include items such as towels, wiping cloths, puffs, various filters, tire cords, ropes, and fishnets.

(Examples) Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples. In addition, all “proportions” are based on weight unless otherwise specified.

Example 1 Sixteen rows of fluid mixers in which six fluid alternating arrangement elements of the same type as those described in Japanese Patent Publication No. 60-1048 are connected in the vertical direction, and fluid discharged from two rows of the fluid mixers are provided below the rows. Polyethylene terephthalate as the component A, B using a spinning pack incorporating a binding plate for binding and a C-type nozzle spinneret.
Polyarylate (wholly aromatic polyester) as a component
Was melt-spun.

The cross-sectional shape of the obtained fiber was a multi-layered type in which 50 to 65 pairs of A and B were alternately and repeatedly bonded, and further, the right-angled side surfaces were bonded and formed into an annular conjugate fiber. That is, two layers of radial type multi-layered junctions were arranged in an annular shape, and their boundaries were joined. The spinning conditions at this time are
The temperature was 320 ° C., the take-up speed was 1000 m / min, the number of filaments was 8, and the component ratio A / B = 70/30.

Subsequently, the composite fiber was subjected to a dry heat treatment at 200 ° C. for about 20 hours, and further combined into a yarn having 24 and 75 denier filaments.

The obtained yarn had a tenacity of 14.1 g / d, which was almost double the tenacity of 7.2 g / d of the polyester normal yarn of the same denier. Moreover, when a woven fabric and a non-woven fabric were formed by using this yarn, an extremely strong fabric could be obtained.

Example 2 16 rows of fluid mixers in which six fluid alternating arrangement elements of the same type as those described in Japanese Patent Publication No. 60-1048 are connected in the vertical direction, and fluid discharged from the two rows of the fluid mixers are arranged below the rows. A composite consisting of a polycaptolactam polyether block copolymer containing 45 wt% of a polyoxyethylene segment having a molecular weight of 4000 as the A component and nylon 6 as the B component using a spinning pack incorporating a bonding plate and a C-type nozzle spinneret. The fibers were melt spun.

The cross-sectional shape of the obtained fiber was a multi-layered type in which 50 to 65 pairs of A and B were alternately and repeatedly bonded, and further, the right-angled side surfaces were bonded and formed into an annular composite fiber. That is, it was a conjugate fiber in which two layers of radial type multi-layered junctions were annularly arranged and the boundaries thereof were joined. The spinning conditions at this time were a temperature of 270 ° C., a take-up speed of 1200 m / min, a filament number of 8, and a component ratio A / B = 20/80.

Continuously, pulling speed 400 m / min, hot plate temperature 120
After drawing at a draw ratio of 3.2 ° C. and a draw ratio of 3.2, the yarn was combined into a 24-denier, 8-filament drawn yarn. This drawn yarn was twisted at 150 T / m as a warp yarn and 100 T / m as a weft yarn, and a woven fabric having a weaving density of 112 warps / inch and 105 wefts / inch was woven.

The woven fabric was dipped in a treatment liquid containing a surfactant at 98 ° C. to perform relaxing scouring, and then dry heat treatment was performed at 160 ° C. for 1 minute.

The obtained woven fabric was dyed in dark blue by a conventional method. The dyed fabric had a frictional electrification voltage of 990V, which had excellent electrostatic properties. Moreover, it had a span-like feel and texture.

Example 3 16 rows of fluid mixers in which six fluid alternating arrangement elements of the same type as those described in Japanese Patent Publication No. 60-1048 are connected in the vertical direction, and fluid discharged from two rows of the fluid mixers are provided below the fluid mixers. Using a spinning pack incorporating a binding plate for binding and a C-type nozzle spinneret, a composite fiber composed of nylon 6 as the A component and polyphosphazene (PLP-210 manufactured by Nippon Soda Co., Ltd.) as the B component was melt-spun.

The cross-sectional shape of the obtained fiber was a multi-layered type in which 50 to 65 pairs of A and B were alternately and repeatedly joined, and further, two layers thereof were bonded to each other at right-angled side faces and formed into an annular conjugate fiber.
That is, the radial type multi-layer junction type was arranged in two layers in an annular shape. The spinning conditions at this time were a temperature of 280 ° C., a take-up speed of 1200 m / min, a filament number of 8, and a component ratio A / B = 70/30. Continue drawing speed 400m / min, hot plate temperature 1
Drawing was carried out at 20 ° C. and a draw ratio of 2.8 to obtain a drawn yarn of 8 denier and 24 denier.

While weaving this stretched yarn, we twist 150 T / m as warp yarn and 100 T / m as weft yarn and weave density is 125 warp /
Weaving a plain weave with 120 inches per inch and 120 horizontal inches.

This woven fabric was dipped in a treatment liquid containing a surfactant at 98 ° C. to perform relaxing scouring and dry heat treatment at 160 ° C. for 1 minute.

The obtained woven fabric was flame-retardant enough to have self-extinguishing property. Moreover, it had excellent flexibility and elasticity.

(Effects of the Invention) The multileaf fiber of the present invention has the following effects.

Since the film-like components laminated in multiple layers are arranged in a radial shape and in multiple layers, they have a span-like feel and texture, and further have good flexibility and elasticity.

Since the coupling portion of the annular primary aggregate firmly connects the components, the shape of the fiber is not easily broken and the workability is extremely good.

Further, due to the special shape of the fiber of the present invention, a polymer which has been practically problematic and difficult to use can be applied by tying it with another polymer. Therefore, by selecting a polymer according to the purpose and application, it is possible to enhance the strength, impart water absorption, impart water retention, soften, impart flame retardancy, impart bulkiness, increase specific gravity, impart antistatic property, etc. And a wide range of performance can be selected.

[Brief description of drawings]

1 and 2 are cross-sectional model views showing an example of the multileaf fiber of the present invention. a, b: Ring-shaped primary assembly 1, 2: Film-like constituent element 3: A part of the ring-shaped primary assembly that is joined back to back at right angles to each other.

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location D01F 8/16 7199-3B

Claims (1)

[Claims] 1. A film-like constituent element comprising component A and a film-like constituent element comprising component B are alternately superposed to form a radial primary assembly, and a plurality of said cyclic primary aggregates are formed. A multilobe fiber characterized by forming an annular secondary aggregate in which the right-angled side faces are connected to each other.