JPH06316826A - Stretchable spunlike finished yarn and its production - Google Patents

Abstract

PURPOSE:To provide an improved stretchable and spunlike finished yarn showing a feeling similar to a spun yarn, exhibiting deep feather effect by dying and free from peeling (extrusion of a core yarn) that is a conventional defect of a coated elastic yarn. CONSTITUTION:This finished yarn is produced by using an elastic yarn A as core yarn, placing polyester multifilament twisted yarns B non-dyeable by an ionic dye around A as intermediate layer yarn and placing polyester multifilament twisted yarns C dyeable by an ionic dye further around B as sheath yarn in an alternately twisting manner. Entangled parts intruding into each other are formed between A and B and B and C.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to stretchable spunlike yarns having a heather effect and improved stretchability properties.

[0002]

2. Description of the Related Art Conventionally, as a method for producing a stretch-like spun-like yarn, for example, a stretched elastic yarn and a thermoplastic non-elastic fiber bundle are aligned and false twisted, and then relaxed ( Japanese Patent Publication No. 50-5305), or polysynylene terephthalate and a polyester filament having a higher elongation than the filament are mixed and entangled, and then simultaneously drawn and false twisted to give a spunlike yarn with high elasticity. Is disclosed (Japanese Patent Publication No. 60-20489).

However, in all of these methods, the elastic yarn is coated with only one kind of thermoplastic fiber, and the coating is insufficient, and when the elastic yarn is processed into a woven or knitted fabric or the like, only the elastic yarn is coated. The stress concentrates, causing thread misalignment and scoring of the elastic thread (a phenomenon in which the elastic thread jumps out due to cutting of the elastic thread, plastic deformation, or displacement of the coated thread), which not only impairs the appearance of the product, but also It has a fatal defect that it may become unusable due to a decrease in stretchability.

In order to solve such a problem, the present applicant has previously proposed that the elastic yarn is covered with two kinds of crimped yarns, in which case the elastic yarn and the crimped yarn and between the crimped yarn and the crimped yarn are wound. We proposed a bulky elastic yarn having a multi-stage stress relaxation function in which mixed fibers and entangled portions were partially provided with the crimped yarn (Japanese Patent Application No. 4-164857).

According to the proposal, since the elastic yarn is sufficiently covered and the yarn deviation and the unfolding of the elastic yarn can be prevented, it is possible to give good elasticity. However, the present inventors further detailed. As a result, the heather effect can only be imparted by making the polyester multifilament crimped yarn arranged in the outer layer portion of the bulky elastic yarn into a polyester multifilament crimped yarn dyeable with an ionic dye. It has been clarified that the stretching property can be improved especially for low elongation.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to have a spun yarn-like texture and a deep heather effect by dyeing, and to prevent the disadvantage of conventional coated elastic yarns, that is, eyebrow. Another object of the present invention is to provide a spun-like processed yarn having improved stretchability with respect to low elongation.

[0007]

According to the present invention, therefore, (1) an elastic yarn (A) is used as a core yarn, and a polyester multifilament crimped yarn (a) around which (A) is insoluble in an ionic dye ( B) is disposed as an intermediate layer, and a polyester multifilament crimped yarn (C) dyeable to an ionic dye is wound around (B) as a sheath portion in an alternate twisted yarn form, and (A) and (B) ) And between (B) and (C), an interlaced portion in which the filaments are mixed and intermingled with each other is formed, and a stretchable spun-like processed yarn, and (2) a tension state And the partially stretched polyester yarn which is not dyed with an ionic dye and has a breaking elongation of 100 to 250%, and a breaking difference of not less than 250% and a partially oriented yarn of 80% or more. % Non-stretched polyester dyeable to ionic dye After aligning the threads with each other and applying a entanglement of 60 to 120 kegs / m by the disturbing air flow, 1.
There is provided a method for producing a stretchable spun-like processed yarn, which comprises simultaneously drawing and false-twisting at a draw ratio of 2 times or more.

The present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view showing an embodiment of the present invention. First, the elastic yarn 1 is stretched 2 to 5 times between the pair of the first roller 5 and the second roller 6, and then the polyester multifilament 2 which is not dyed with the ionic dye and the dye which is dyed with the ionic dye are dyed. The polyester multifilament 3 is supplied, and the entanglement nozzle 7 provided between the second roller 6 and the third roller 8 imparts an entanglement with an entanglement degree of 60 to 120 ke / m. At this time, it is suitable that the compressed air pressure is 1 to 6 kg / cm2 and the overfeed rate is 0.5 to 4%. By performing this entanglement treatment, it is possible to prevent the misalignment between yarns, and it is also possible to significantly reduce the number of yarn breakages during false twisting.

Next, the entangled yarn is 1.2 times or more using a heating plate 9 provided between the third roller 8 and the drawing roller 11 and a triaxial multi-step disc type external friction false twisting tool 10. At the same time, it is drawn and false twisted at the same time. The temperature of the heating plate may be appropriately set within a range that does not cause fusion or deterioration of the elastic yarn or the polyester multifilament 2 or 3, but is preferably 10
It is 0 to 180 ° C. Further, the draw ratio may be appropriately set according to the elongation of the thermoplastic synthetic fiber used. The peripheral speed of the false twist disk is preferably about twice the yarn speed. Then, the heat-set and untwisted entangled yarn is wound up as cheese 13 by the winder 12.

The elastic yarn used in the present invention has a temperature of 160 to 240 ° C.
It has a melting point of 200 to 900% and an elongation of 200 to 900%, and examples thereof include polyurethane, polyester, polyamide and rubber. Above all, a block copolymerized polyether / ester elastic yarn having a polybutylene terephthalate polyester as a hard segment and a polyoxybutylene glycol polyether as a soft segment is preferable from the viewpoint of heat resistance and chemical resistance. Further, pre-drawing of the elastic yarn can be omitted by adjusting spinning conditions and the like to reduce the elongation of the elastic yarn in advance.

The ionic dye-non-staining polyester multifilament used in the present invention means polyethylene terephthalate or a third component having no affinity for the ionic dye (eg isophthalic acid, propylene glycol, etc.). It is a generic term for multifilaments made of a small amount of copolymerized polyester, which are not substantially dyed with ionic dyes such as acid dyes and basic dyes. The cutting elongation of the polyester multifilament is 10
It is 0 to 250%. If the breaking elongation is 100% or less, yarn breakage frequently occurs during simultaneous false twisting, while if it exceeds 250%, misalignment with the core yarn occurs.

On the other hand, a polyester multifilament dyeable to an ionic dye is a polyester containing a group (eg, a sulfonate group) dyeable to an ionic dye in a molecule or a polymer dyeable to an ionic dye. A multifilament made of polyester blended with (for example, nylon 6), which is dyed in a dark color with an ionic dye, is collectively referred to. Among them, as the acid component,
A polyester multifilament made of copolymerized polyethylene terephthalate containing about 0.5 to 10 mol% of 5-sodium sulfoisophthalic acid is suitable.

The cutting elongation of the polyester multifilament is 250% or more, and the cutting elongation difference with the polyester multifilament which is not dyed with an ionic dye is 80%.
That is all. Cutting elongation is less than 250% or elongation difference is 80
When it is less than%, a good winding structure is not formed,
The effect of the present invention does not appear.

The above-mentioned two types of polyester multifilaments may be added to other modifiers, antioxidants, antitwisting agents, antistatic agents, optical brighteners, colorants, stabilizers within the range not impairing the object of the present invention. Inorganic particles may be added.

Further, the above two kinds of polyester multifilaments show different dyeing properties when dyed with an ionic dye, and also have different crimping properties when subjected to simultaneous drawing and false twisting.

That is, the polyester multifilament dyeable to the ionic dye is ionic under the same temperature conditions because the dyeable group contained in the polymer and the polymer act as a plasticizer. It has a lower crimping performance than dye-nonstaining polyester multifilaments.

The spun-like processed yarn of the present invention comprising the above-mentioned fiber as a constituent has an elastic yarn as a core yarn, and a polyester multifilament crimped yarn which is insoluble in an ionic dye around the elastic yarn as an intermediate layer. It is necessary to have a three-layer structure in which the polyester multifilament crimped yarns that are arranged and around which ionic dyes are dyeable are wound around them. If this three-layer structure is not formed, the multi-step stress relaxation function described below does not appear and it is not possible to prevent the occurrence of eye blinding.

[0018]

Since the present invention has the above-mentioned structure, it has the following effects. In the spun-like processed yarn of the present invention, a polyester multifilament crimped yarn which is not dyed with an ionic dye is arranged as an intermediate layer around an elastic yarn, and further around that, a polyester multifilament dyeable with an ionic dye. The crimped yarn has a three-layer structure in which the sheath portion is wound in an alternate twisted yarn shape, and the elastic yarn and the crimped yarn in the intermediate layer, and the crimped yarn in the intermediate layer and the crimped yarn in the sheath portion are mixed fibers. Since it has an entangled portion, it has a multi-step stress relaxation function and can prevent unfolding even in a non-twisted state, and can obtain a soft and smooth stretch characteristic excellent in wearing feeling.

That is, the multi-step stress relaxation function means that when the spun-like processed yarn is stretched, the elastic yarn of the core portion is first stretched, and then the stretching stress is transmitted to the crimped yarn of the intermediate layer, and the intermediate layer is crimped. This is a function that makes it possible to resist the tensile stress in the entire processed yarn, such that the crimped yarn in the sheath portion further expands while the crimp of the crimped yarn resists the tensile stress.

Further, in the present invention, since the crimp ratio of the crimped yarn of the sheath portion is smaller than that of the crimped yarn of the intermediate layer, the elongation of the crimped yarn of the sheath portion is increased by the intermediate layer. It starts almost at the same time as the elongation of the crimped yarn, and exhibits a good elongation recovery which is resistant to the elongation of low elongation.

Further, the crimped yarn of the intermediate layer and the crimped yarn of the sheath portion have different dyeing properties to the ionic dye, and moreover, the above-mentioned mixed fiber / entangled portion is present. To be
When dyed with an ionic dye, a good heather effect can also be imparted.

On the other hand, in the case of the conventional coated elastic yarn, the wound yarn is not sufficiently covered, and only the elastic yarn resists the stretching stress and is stretched more than necessary, so that the deterioration is accelerated, and Peeling and other phenomena occur.

Further, as compared with the spun-like processed yarn using polyester multifilament which is dyeable or non-dyeable with an ionic dye in both the intermediate layer and the sheath portion, the elongation recovery property especially for elongation of low elongation is improved. .

Hereinafter, the present invention will be described more specifically with reference to examples.

[0025]

Example 1 As the elastic yarn, a block copolymerized polyetherester unstretched monofilament (70 denier) having a breaking elongation of 800% and polybutylene terephthalate as a hard segment and polyoxybutylene glycol as a soft segment was used. The elastic yarn and the cutting elongation are 15
0% polyester multifilament undrawn yarn (12
0 denier / 36 filaments) and cutting elongation of 370%
Of a polyester multifilament unstretched yarn (13%) of 2.6 mol% of 5-sodium sulfoisophthalic acid
5 denier / 48 filaments) were combined and fed to the apparatus shown in FIG.

First, the elastic yarn 1 is attached to the first roller 5 and the second roller.
After stretching it 3 times with a roller 6, it is aligned with the above-mentioned two types of polyester multifilaments on the upstream side of the second roller 6 and passed through an interlace nozzle 7 provided between the third roller 8 and a pneumatic pressure of 4 kg / cm2, overfeed rate 1.5
The entanglement of about 80 / m was given in%.

Next, the third roller 8 and the stretching roller 1
Simultaneous drawing false twisting, heat setting, and untwisting were performed between the heating plate 9 and the false twisting disk 10 provided between the first heating plate 9 and the false twisting disk 10 and then wound by the winder 12 to obtain a bulky elastic yarn 13. At this time, the draw ratio was 1.54 times, the temperature of the heating plate was 160 ° C., the peripheral speed of the false twist disk was 600 m / min, and the draw roller speed was 320 m / min.

The cross section of the obtained spun-like processed yarn is, as shown in FIG. 2, a polyester multifilament crimped yarn which is not dyed with an ionic dye, and a polyester multifilament dyeable with an ionic dye. It had a three-layer structure in which filament crimped yarns were arranged in the sheath.

FIG. 3 is a side view of the spun-like processed yarn obtained in the present invention. (A) of FIG. 3 shows the processed yarn in a pulled state, and (b) of FIG. 3 shows it. Indicates a free state. As is clear from the figure, the spun-like processed yarn of the present invention does not cause yarn deviation or peeling of the elastic yarn, and exhibits good stretchability.

This bulky elastic yarn is subjected to S twist of 150 t / m,
After weaving into a plain weave with a density of 100 warps / inch and weft of 60 stitches / inch, smelting, presetting and dyeing (dying with Cathilon Black CD-BLH, 7% owf made by Hodogaya Chemical Co., Ltd.) and final set according to the usual method I did.

The resulting woven fabric had a soft, spun-like texture and a deep heather appearance, and exhibited good stretching performance especially for stretching at low elongation. Further, as a result of observing the appearance of the woven fabric when stretched by 30% in each of warp and weft directions, no scoring was observed.

[0032]

Example 2 The same elastic yarn as in Example 1 was used, and the cutting elongation was
110% polyester multifilament unstretched yarn (75 denier / 12 filaments) and breaking elongation of 260
% Of 5-sodium sulfoisophthalic acid 2.6 mol%
Example 1 using undrawn polyester multifilament yarn (130 denier / 48 filaments)
A spun-like processed yarn 13 was obtained by the same method as described above. At this time, the stretch ratio of the elastic yarn is 4 times, and the simultaneous draw false twist ratio is 1.35.
Twice the temperature of the heating plate was 180 ° C.

This processed yarn is applied with 1500 t / m of S twist, and the warp is
After weaving into a 2/2 twill with a density of 90 yarns / inch and weft 55 yarns / inch, refining, presetting, dyeing, as in Example 1,
The final set was done.

The resulting woven fabric had a soft, spun-like texture and a deep heather appearance, and exhibited a good stretchability particularly for low elongation. Further, as in the case of Example 1, even when the fabric was stretched by 30% in the warp direction and the weft direction, no scoring was observed.

[0035]

Comparative Example 1 The same elastic yarn as in Example 1 was used, and the cutting elongation was
Spunlike yarn 13 in the same manner as in Example 1 using only 120% of one polyester multifilament undrawn yarn (130 denier / 48 filaments) copolymerized with 2.6 mol% of 5-sodium sulfoisophthalic acid. Got At this time, the stretch ratio of the elastic yarn was 3 times, the simultaneous draw false twist ratio was 1.5, and the temperature of the heating plate was 160 ° C.

This processed yarn is applied with an S twist of 150 t / m, and the warp is 10
After weaving into a plain weave at a density of 3 yarns / inch and weft 63 yarns / inch, refining, presetting, dyeing and final setting were performed in the same manner as in Example 1. The resulting woven fabric was inferior in quality due to incomplete coverage of elastic yarn, and lacked smooth stretchability. Further, as in Example 1, when 30% elongation was applied to each of the warp and weft directions of the woven fabric, the occurrence of eye bleeding was observed and the heather effect was insufficient.

[0037]

Comparative Example 2 The polyester multifilament undrawn yarn (135 denier / 48 filaments) obtained by copolymerizing 2.6 mol% of 5-sodium sulfoisophthalic acid in Example 1 was not dyed with an ionic dye having an elongation of 380%. Polyester multifilament unstretched yarn (135 denier / 48
The same procedure as in Example 1 was performed except that the filament was changed.

The resulting woven fabric had a soft and spun-like texture, and had a warp and weft direction of 30 respectively.
Even when a stretch of 100% was given, no peeling was observed at all, but the stretchability for stretching at a low stretch was slightly lacking in resistance.

[0039]

According to the present invention, it is possible to prevent the elastic yarn from being unfolded even in the untwisted state, and to have a soft and span-like feeling, a deep heather appearance, and particularly resistance to low elongation elongation. Shows strong and good elongation recovery.

[Brief description of drawings]

FIG. 1 is a side view of an apparatus for producing a spun-like textured yarn according to the present invention.

FIG. 2 is a sectional view of a spun-like processed yarn of the present invention.

FIG. 3 is a side view of the spun-like processed yarn of the present invention.

[Explanation of symbols]

1 Elastic yarn 2 Polyester multifilament non-staining to ionic dye 3 Polyester multifilament dyeable to ionic dye 4 Thread guide 5 First roller 6 Second roller 7 Entangling nozzle 8 Third roller 9 Heating plate 10 Friction False twisting tool 11 Drawing roller 12 Winding machine 13 Cheese A Elastic yarn B Polyester multifilament non-staining to ionic dye C Polyester multifilament dyeable to ionic dye

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location D03D 15/00 C 7199-3B

Claims (2)

[Claims] 1. An elastic yarn (A) is used as a core yarn, and a polyester multifilament crimped yarn (B) which is insoluble in an ionic dye is arranged around (A) as an intermediate layer. A polyester multifilament crimped yarn (C), which is dyeable to an ionic dye, is wound around the yarn in an alternating twisted yarn form as a sheath portion, and between (A) and (B) and between (B) and (C). An elastic spun-like processed yarn characterized in that interlaced portions in which the respective filaments are mixed and intermingled with each other are formed therebetween. 2. An elastic yarn in a stretched state and a breaking elongation of 10
Partially oriented polyester yarn which is 0 to 250% non-staining to ionic dyes and dyeable to ionic dyes having a breaking elongation of 250% or more and an elongation difference with the partially oriented yarn of 80% or more Stretch-like spun-like process characterized by aligning with unstretched polyester polyester yarn, imparting a entanglement degree of 60 to 120 keels / m by disturbing air flow, and then simultaneously drawing and false-twisting at a draw ratio of 1.2 times or more. Thread manufacturing method.