JPS60194138A - Processed yand good in bundling property - 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 [Technical Field of the Invention] The present invention is obtained by false-twisting a polyester filament and a low melting point filament.

The present invention relates to a partially bonded bundled structural yarn.

[Prior art and its problems]

A large number of studies have been conducted on the two-layer structure yarn 2 or alternately twisted structure yarn obtained by false twisting two types of multifilaments having different melting points or elongations. The purpose of these yarns is to create a texture similar to that of spun yarn.
It's the appearance. here.

It goes without saying that two-layer structured yarns and alternately twisted structured yarns with nine different textures and appearances can be obtained depending on the characteristics of the two types of filaments used in the blending process. There are only a few types of processed thread, and only linen-like processed thread with a rich texture is used. The main reason is that in order to fix the two-layer structure or the alternately twisted 1114 structure, the filament must be processed with high adhesion at 1F6 temperature, which makes the entire system extremely hard due to the characteristics of thermoplastic synthetic fibers.

This is because although it was possible to achieve a hard (negative linen-like) texture, it was not possible to obtain a soft texture.

In contrast, Japanese Patent Application Laid-Open No. 57-29628.

A two-layer structure yarn that is false-twisted at low temperatures has been proposed. This is after fluid entangling the low oriented undrawn yarn and the highly oriented yarn.
False twisting is done at a low temperature of 10-16Dc.

The purpose is to melt low-oriented undrawn yarn and use its adhesive action to obtain a two-layer structured yarn. But in this case.

Because the filament, which is the adhesive component, is not fully oriented, it undergoes severe thermal deterioration even at low temperatures as mentioned above, resulting in a decrease in strength and frosting problems in practical use. However, it is subject to usage restrictions.

[Object of the present invention]

The present invention has a spun yarn-like texture and appearance that is rich in flexibility while maintaining the strength as a yarn.

The purpose is to obtain processed yarn with good cohesiveness.

[Configuration of the present invention]

The present invention consists of the following configuration.

[Polyester multifilamen] Consists of (A) and a polymer with a melting point of 180°C or less, or a polyester with a melting point of 18
It is an intertwined mixed fiber yarn of multifilament (B) which includes a polymer of 0C or less as a part of its constituent components.

At least a part of the single fibers of the multifilament (B) are adhered to the polyester multifilament (A) while encompassing a part of the single fibers, and the surface of the yarn has S twist and 2
(A processed yarn with good cohesiveness characterized by exhibiting a twisted structure and being exposed.) The external features of the yarn of the present invention are explained in Fig. 1.A
is 8 (1) for the constituent single fibers of the polyester multifilament (A), B indicates the constituent single fibers of the low melting point polymer or the multifilament (13) containing the low melting point polymer, and BB is the multifilament) ( This is the part where the single fibers of T3) are bonded together. in this way.

The bonded portion 13B between the single fibers (multifilamen) (13) is exposed on the surface of the yarn with S twist and 2 twist, maintaining the cohesiveness of the entire system. The adhesive portion BB does not need to cover the entire outer circumference of the thread.

This is because the single fibers of the polyester multifilamen (A) and the single fibers of the multifilament (CB) are in an intertwined and mixed state, so the bundled structure is extremely stable.

Is the yarn of the present invention made of polyester multifilament (A) and a polymer having a melting point of 18[]c or less?

Alternatively, a multifilament (B) containing a polymer having a melting point of 180°C or lower as part of its constituent components is arranged.

After fluid entanglement treatment, the multifilament (B
) having a melting point of 180° C. or lower is obtained by false-twisting the polymer at a temperature above the softening and fluidizing temperature and below the melting point.

The most important point of the yarn of the present invention is that the bonding portion is formed at a very low temperature. By being false-twisted at low temperatures, the polyester multifilament (A) does not have strong curling, but has a sweet curling that is closer to staples.
It is bundled while maintaining flexibility similar to that of raw silk due to the fact that crystallization does not progress very much. As a result, a fabric made from a single 1 jll yarn has a texture similar to that of a spun yarn.

Specifically, a polyester multifilament containing polyethylene terephthalate or polybutylene terephthalate as a main component can maintain its flexibility by being false-twisted at a temperature of 180° C. or lower, preferably 1,500° C. or lower.

Therefore, multifilaments involved in adhesion (13)
It is necessary that the filament has a polymer component with a melting point of 180°C or less, and the melting point is 180°C or less.
At a low temperature of around 50° C., the adhesive portion BB exposed on one surface as shown in FIG. 1 can be formed.

What is more important here is the thermal properties of the polyester multifilament (A) and the multifilament (B).

Mass polyester multifilament) is described above. Even during false twisting at 180° C. or lower, preferably 150° C. or lower, it must be thermally stable and exhibit no deterioration in strength. For this purpose, the birefringence must be 150xl O or more.
Two are ordinary drawn yarns.

No problem will occur if highly oriented polyethylene terephthalate with a birefringence of 70 x 10" or more, which has been directly spun and drawn at a high speed of 4500 rn/preparative, is used.

Furthermore, the multifilament (A) may be a filament group in which a plurality of types of filaments having different finenesses, dyeability, etc. are mixed.

Regarding (B), a multi-filamen containing a polymer with a melting point of 180° C. or less, practical problems will occur unless thermal deterioration due to false twisting is prevented. First, the melting point is 180
Multifilament made only of polymers below ℃ (B)
When using polyester multifilament (A), it is necessary to keep the composition ratio of the entire system as small as possible and reduce the number of bonded parts to maintain the flexibility of the thread.As a result, the overall system of polyester multifilament (A) It is better to keep the strong contribution ratio high.

At this point, as a multifilament CB), the melting point is 18
When using a composite co-spun multifilament having a polymer of 0c or less as part of its constituent components.

Since the ratio of the components in contact with the entire system can be made extremely small, flexibility can be maintained and the strength retention rate can be further improved. The composite structure of composite co-spinning is not limited to the (I4 structure), especially if there is a polymer with a melting point of 180°C or lower on the surface of the single fibers during false twisting.For example, polyethylene terephthalate, polybutylene terephthalate, etc. Polyesters such as
Composite yarn as a component.

A composite yarn having a structure in which polyester is divided by a polymer having a melting point of 18Dc or less may be used.

Here, examples of polymers with a melting point of 180°C or less are given.

For example, difunctional carboxylic acids such as terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid, adipic acid, mobanonic acid, and l-decanedioic acid, and their ester derivatives; and ethylene glycol, diethylene glycol, triethylene glycol, and tetraethylene glycol. ) =+-#,
Tori, J Chile 7 Krikor.

Tetramethylene glycol, polyethylene glycol,
Polyoxymethylene glycol power'i such as polytetramethylene glycol, 1-4 cyclohexanediol, 1
-4 cyclohexane dimetatool.

1-6 hexanediol, furopylene gellicol.

Diol compounds such as 1-5bentanediol, colored polyester fibers or polyester polymers, and their combination with benzoylbenzoic acid, benzyloxybenzoic acid, and methoxybenzoic acid polyethylene glycol.

A polyester component selected from polyoxymethylene glycol, glycerin, pentaerythritol, trimerissoic acid, trimesic acid, and their derivatives, and a metal-containing sulfonate ester. It is a copolymerization of components.

The melting point here refers to an endothermic peak of 1111.1 degrees as measured by a differential scanning calorimeter (DSC). However, for convenience, it may be expressed by the melting start temperature observed by a melting point microscope.

[Effects of the present invention]

The processed yarn with good cohesiveness of the present invention is unique.

I couldn't make it happen. It is a spun yarn-like processed yarn that can satisfy the contradictory characteristics of smooth taste and flexibility. In other words, most of the single fibers that make up the yarn are subjected to a false twisting process at low temperatures, so they maintain a soft texture similar to that of raw silk.
In addition, this is due to the effect of the adhesive piece polymer having a low melting point. S on the thread surface
Twisted and double-twisted parts give a moderate/yellow feel to the skin. Moreover, since the thermal deterioration of the entire system is small, there is no decrease in strength, which is excellent in practical use.

Furthermore, since the temperature during false twisting is low, the dye adsorption ability of the yarn is maintained at a high level.

This yarn exhibits extremely good color development when compared to ordinary false twisted yarn.

Example 1 Polyethylene terephthalate 1-751)-72r with 1N refraction 150 x 10-' multifilament (Δ
)and.

The melting point is 135°C. The sheath component is a copolymer of DMT, DMI, and dimethyl 5-sodium sulfoisophthalate. (B) (75D-24f),
The fibers were interlaced and mixed using an interlace nozzle. Subsequently, the yarn was false-twisted using a circumscribed friction false-twisting device at a temperature of 120° C. to obtain a textured yarn having the appearance shown in FIG. The bending rigidity of this yarn was measured using a pure bending tester (KmS-F2) manufactured by Kato Iron Works Co., Ltd.
It showed a bending moment of 0-'g'an2/piece.

Furthermore, this yarn was knitted into a 24G interlock and dyed with a 1-disperse dye. The obtained knitted fabric was an asymmetric satin-like knitted fabric of the first stitch, and had a smooth but flexible texture.

Example 2 Birefringence 1 directly spun and drawn at a spinning speed of 6000 m/min
10 x 10” polyethylene terephthalate multifilament 75D-36f multifilament)
Except for using multifilament (A), multifilament (B) was used in the same manner as in Example 1, and fluid treatment and false twisting were performed under the same conditions to obtain 9 processed yarns of the present invention. The bending rigidity of this yarn was 4.2 x IF3g-(2)2/strand, which was approximately the same value as in Example 1. The texture of the fabric is a little harder than that of Example 1, but it is extremely soft compared to the second comparative example. The strength of the thread is 3
．． It was 8 g/D.

Comparative Example A multifilament of polyethylene terephthalate (75D-72f) with a birefringence of 150 x 10" as in Example 1 (A) and a multifilament of polyester 105o-24f with a birefringence of 32 x 10" (B). After the fibers were aligned, entangled and blended, they were false-twisted at 200°C to obtain a two-layered yarn in which the multifilamen (B) lightly contributed to fusion bonding. The bending rigidity of this yarn is 22×10-5g-Cfn
It showed a bending moment of 2/piece. When this yarn was knitted and dyed in the same manner as in the example, it had a very crisp linen-like texture, but the flexibility was
The knitted fabric was extremely stiff compared to the previous example.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of an embodiment of the yarn of the present invention. A in the figure is polyester multifilament (
A) is a single fiber, B is a multifilament (B) single fiber, and BB is a part where the multifilament (B) single fibers are bonded together.

Claims (3)

[Claims] (1) Polyester multifilamen) (A) and
It is an intertwined mixed fiber yarn of a multifilament (B) made of a polymer with a melting point of 180°C or less, or a polymer with a melting point of 180°C or less as part of its constituent components, and a single fiber of the multifilament (B). At least -S of the polyester multifilament (A) is adhered to the surface of the yarn while encompassing a portion of the single fibers. A processed yarn with good cohesiveness characterized by exhibiting S-twist and two-twist structures and being exposed. (2) The single fiber of the multifilament CB) is a composite co-spun filament of a polymer with a melting point of 180°C or less and a polyester polymer with a higher melting point. Processed yarn with good cohesiveness as described in . (3) Polyester multifilamen) (A) is
Birefringence Δn is 70-1Ox 10-3. bo17
The processed yarn with good cohesiveness according to claim (1), which is a filament containing ethylene terephthalate as a main component.