JPH0826491B2 - Processed yarn of core sheath and structure and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Summary of the Invention The present invention relates to a multifilament (A) of substantially polyethylene terephthalate having a single fiber fineness of 1 to 10d in a core portion of a processed yarn, and in a sheath portion of the processed yarn. Single fiber fineness 0.
The present invention relates to a multifilament of an ultrafine yarn of 7d or less, or an entangled textured yarn having a core and a composition in which the original multicomposite filament (B) that gives the ultrafine yarn mainly as a minor component is mixed. Due to this structure, the processed yarn of the present invention has the same soft feel and appearance as a spun yarn even though they are filamentous, and the gloss when formed into a woven fabric is elegant, and the dyed product is a dyed spot. Does not have.

(B) Conventional Technology As a technology very similar to the present invention, there is a technology described in Japanese Patent Laid-Open No. 163230/55. The technique (processed yarn) disclosed in the publication is a processed yarn having a core and structure as schematically shown in Fig. 2 of the publication, that is, a core having a single fiber fineness of 1 to 2d and a sheath having The mixed yarn of 0.05 to 1.5d and 1 to 5d is arranged. As described in the publication, "a fine jade tone color tone is obtained, and by dyeing, a soft tone color tone is obtained", and an extra fine thread and a thick thread arranged in the sheath portion are described. Emphasizes the effect of mixed fibers.

C) Aim of the present invention and a problem to be solved The present invention is different from the above-mentioned prior art in that only ultrafine yarn of 0.7d or less is arranged as the fiber of the sheath portion, and the aim is to give a feeling of touch of the yarn or the fabric. The purpose is to obtain a processed yarn for spun yarn that has excellent gloss. Further, in the present invention, such a processed yarn and an undrawn yarn which is not described in the above-mentioned prior art can be obtained by a simultaneous drawing false twisting method,
In order to improve the process passability of the yarn, the yarn is further entangled at a certain interval or less by an air entanglement treatment. The present invention, as shown by the following Examples and Comparative Examples, provides a spun yarn-like filament yarn that is soft and has no uneven spots by not including the large-fineness yarn as in the prior art in the sheath portion. .

D) Configuration of the present invention That is, the processed yarn according to the present invention has a fineness of the core sheath 2
It has a layered structure, and the core has a fineness of 1 to 10d (A),
The sheath is made of ultrafine fiber of 0.7d or less, A is 30 to 70% by weight of the total weight of the processed yarn and is substantially polyethylene terephthalate, and the sheath is preferably the ultrafine fiber alone, but in some cases, The composite filament, which is the original thread of the extra fine yarn, has a small amount of ingredients (for example, about 20
It does not matter even if they are mixed as (wt% or less). The composite filament (B) which is a sheath component is a layered flat type composite fiber of polyester and polyamide, and it is efficient that the number of layers is 4 or more. The textured yarn having such a core and structure according to the present invention has bulkiness due to false twist and entanglement between yarns due to air entanglement such as interlace treatment and Taslan treatment with a pitch interval of 10 cm or less in the yarn length direction. By using this, the cores and multifilaments are bundled, and the small loops and bulges of the ultrafine fibers in the sheath are generated by the individual combinations of false twisting and air entanglement, and this is utilized. It becomes a spun yarn-like processed yarn with a soft and soft texture and a soft gloss. In the case of the processed yarn of the present invention, the core sheath and the filament fineness are not 1 to 10d and 0.7d or less, respectively, or the entangled pitch is not 10 cm or less, as shown as a comparative example. At the same time, the case where a large fineness filament is mixed in the sheath as in the prior art is also shown as a comparative example.

The textured yarn of the present invention can be obtained, for example, by the following manufacturing method. Δn10 × 10 ⁻³ to 70 × 10 ⁻³ , single fiber fineness 1 to 10 d. Multi-polyester filament (A) unstretched yarn of which 85 mol% or more is composed of ethylene terephthalate units is 30 to 70% by weight of the whole yarn, and a multi-composite of polyester and polyamide in which the single fiber fineness after splitting is 0.7d or less. Filament (B) unstretched yarn is combined into 70 to 30% by weight of the whole yarn, and the following conditions [I] to
It can be obtained by performing interlace treatment or Taslan treatment so that the entanglement pitch becomes 10 cm or less after the simultaneous drawing and false twisting to satisfy [III].

−2.32Δn + 0.261 <logR <−5.22Δn + 0.588 ... ・
・ [I] 5 × 10 ⁴ Δn + 200 ≦ V ≦ 5 × 10 ⁴ Δn + 600
[II] 0.6Tm ≦ T ≦ 0.9Tm (III) where Δn is the average birefringence of A, R is the draw ratio (times), V is the spinning speed of B (m / min), T is the false twist temperature (° C.), and Tm is the melting point (° C.) of the low melting point filament of A and B.

The conditions [I] to [III] in the present invention are suitable ranges, so-called empirical formulas, which are obtained based on a large number of achievements, and it is necessary to satisfy these conditions at the same time.

According to the examination results of the present inventors, when the above-mentioned multifilament (A) and multifilament (B) are combined and simultaneously drawn and false-twisted, Δn of the multifilament (A) needs to be 10 × 10 ⁻³ or more. When it is less than 10 ⁻³ , yarn breakage during false twisting frequently occurs and the workability is poor. Also,
The upper limit of Δn is 70 × 10 ⁻³ , and when Δn exceeds 70 × 10 ⁻³ , the difference in yarn length between the core yarn and the sheath yarn of the obtained processed yarn is reduced, and it depends on the ultrafine filament which is the sheath yarn. Fewer exposed surfaces on the fibrillated surface eliminate the spun-yarn-like appearance that is aimed at by the present invention, similar to cotton. In addition, the proper draw ratio R when simultaneously drawing and false-twisting is represented by the above formula [I], and when logR is less than or equal to the lower limit, the cause of uneven dyeing and the obtained processed yarn are apt to stick in the dyeing step. The intended effect of the invention cannot be obtained. On the other hand, if logR is more than the upper limit, yarn breakage and feathers may occur during false twisting, which is not preferable. Further, the spinning speed V of the multifilament (B) used in the present invention must be determined by the linear expression of Δn of the multifilament (A) as shown in the formula [II]. The fact that it is an essential condition for exerting the effect was found. If this formula is not satisfied, it becomes impossible to place the multifilament (A) on the core portion of the processed yarn and the ultrafine filaments of polyester and polyamide on the pod portion of the processed yarn, which is similar to the processed yarn like cotton. It cannot give a spun yarn-like appearance and a soft feel. Further, the false twist temperature T (° C.) in the present invention is in the range represented by the formula [III], and by doing so, the yarn length with good crimp fastness without causing fusion or sticking in the filament. It is possible to obtain a textured yarn having a difference. Here, if the false twist temperature is too low, the multifilament (B) is hard to be divided, which is not suitable.

To further explain the present invention, the single fiber fineness of the multifilament (A) is 1 to 10d. Here, if the d is smaller than the lower limit, the fabric is too tired to give a soft feel, and if it exceeds the upper limit, the fabric becomes too hard because the fabric is too soft, which is not preferable. Also, if A, which is the core component, is less than 30% by weight of the whole processed yarn, the repulsive force is insufficient due to the adjustment of the texture of the cloth, and the texture of the obtained cloth is uncomfortable and unsuitable. Is. On the other hand, when it exceeds 70% by weight, the soft touch due to the extra fine filament in the sheath part is lacking, and the desired texture and span touch are not obtained.

The filament which is the sheath portion in the processed yarn of the present invention is an ultrafine filament having a diameter of 0.7d or less, preferably 0.05d or more. Here, if it is less than 0.05d, fine fluff is generated during false twisting simultaneously with drawing, which is a cause of yarn breakage, which is not preferable. On the other hand, if it exceeds 0.7 d, the surface of the fabric will not have good touch and the spun yarn-like appearance will not be obtained. Such an ultrafine filament can be obtained by dividing a multi-composite filament (B) of polyester and polyamide. The composite ratio of filament / polyamide of filament B is preferably 1/4 to 1/1. When the composite ratio is less than the lower limit of 1/4, it is generally difficult to obtain a stable false twist split product. On the other hand, when the upper limit is more than 1/1, the composite ratio of polyamide becomes too large, and the filament after spinning easily adsorbs water. As a result, a change in the raw material after spinning tends to occur, and it is not possible to obtain uniform quality, which causes stain stains when the processed yarn is used, which is not preferable.

As the polyester of the multifilament (A) which is the core portion of the processed yarn in the present invention, the main component (85 mol%
Above) is polyethylene terephthalate, and is a polyester copolymerized with 15 mol% or less of other components if necessary.

Other components include copolymerization components such as diethylene glycol, neopentyl glycol, cyclohexane-1,4 dimethanol, isophthalic acid, sulfoisophthalic acid, and polyalkylene glycol. The multi-composite filament (B) used in the present invention is a composite component composed of polyamide and polyester, and one component here is an aliphatic polyamide such as nylon 6, nylon 66, nylon 10 or polyxylene adipamide. And aromatic polyamides such as polyhexamethylene phthalamide.
As the polyester, a main component is polyethylene terephthalate, and if necessary, other component may be a copolymerized polyester having about 15 mol% or less. Other components include copolymerization components such as diethylene glycol, neopentyl glycol, cyclohexanedimethanol, isophthalic acid, sulfoisophthalic acid, polyalkylene glycol, etc., and further additives (eg pigment, carbon, silica, etc.), antistatic property. Improver (eg polyethylene glycol,
At the end A polyalkylene glycol, dodecylbenzene sulfonic acid or the like), a flame retardant or a dyeing / improving agent.

In the present invention, it is necessary to entangle the core yarn and the sheath yarn by interlace treatment or Taslan treatment after the simultaneous drawing and false twisting. The air entanglement after false twist promotes the splittability of filaments having a flat type cross-sectional structure, and the obtained processed yarn is easy to weave when weaving and knitting, and the unwinding property when knitting is improved. Is preferred.

For this purpose, the entanglement pitch in the yarn length needs to be 10 cm or less. Further, such air entanglement reduces uneven dyeing in dyeing a fabric using the processed yarn, and gives a natural appearance.

E) Effects of the Invention The effects of the invention will be described below with reference to Examples and Comparative Examples.

Example 1 and Comparative Examples 1 to 4 Polyethylene terephthalate (abbreviated as PET) having a birefringence Δn = 42 × 10 ⁻³ and a melting point of about 260 ° C. 120d / 24f multifilament (A) undrawn yarn and nylon 6 / The composite ratio of PET is 1/2, and 5 layers of nylon 6 (melting point approx. 220 ° C)
A flat composite multifilament (B) of 125d / 24f obtained by using a PET 6-layer composite polymer at a spinning temperature of 290 ° C. and a spinning speed (V) of 1,100 m / min and 2,300 m / min. Unstretched yarns are combined (A component ratio 49%), and the spindle false twisting method changes the processing temperature as shown in Table 1 to set the number of false twists of 2,211 T / M and the draw ratio of 1.6. The yarn was processed under twisting conditions, and subsequently air entanglement was performed under an air pressure of 4 kg / cm ² to obtain a processed yarn. As a comparative example, a textured yarn without air entanglement was also obtained. Circular knitting of these processed threads is performed, then this circular knit is relaxed (1 g / l with Actitor R-100,
Boiled for 20 minutes) and dyed under the following conditions.

Disperse dye: Kayalon Polyester Rubine GL-SE 6% owf About this result, the yarn length difference of the processed yarn, the knitting property of circular knitting,
The appearance, texture, etc. after dyeing are shown in Table 1 together with Comparative Examples.

Based on the experimental results shown in this table, the spinning speed V (m / min) of the multifilament (B) is expressed by the formula [II], or the false twisting temperature T (° C) at the time of simultaneous false twisting by the stretching is calculated by the formula [III]. ] Should be satisfied.

Example 2 and Comparative Examples 5-8 As shown in Table 2, the undrawn yarn of PET195d / 24f multifilament (A) in which Δn was changed, and the layer of nylon 6 having the same flat cross section as used in Example 1 were used. There are 4 layers, 5 layers of PET are arranged, the composite ratio is nylon 6 / PET = 1/2, and the spinning speed V (m / min) at the spinning temperature 295 ° C. is the spinning conditions shown in Table 2. The unstretched yarn of the 195d / 24f composite multifilament (B) obtained by the above is compounded (A component ratio 49%),
Spindle false twisting process temperature 180 ℃, set false twist number 2,2
The yarn was processed under the conditions of 62 (T / M) and a draw ratio of B times, and subsequently air-entangled under the same conditions as used in Example 1 to obtain a processed yarn. Circular knitting, relaxing, and dyeing were performed on these processed yarns in the same manner as in Example 1.

As shown in Table 2 below, Δn of (A) constituting the core is preferably 10 10 ⁻³ to 70 × 10 ⁻³ , and the draw ratio in the case of simultaneous false twisting is expressed by the formula [ I] was determined to be satisfied.

Example 3 Undrawn yarns of 6 types of multifilament (A) having a filament number (f) of 6,120,12,24,48,96 with PET120d of Δn = 30 to 48 × 10 ⁻³ , and Example 1 In the flat composite multifilament (B) 125d having the same shape as used in Example 1, except that the number of filaments (f) is changed to 12, 16, 24, 32, the same conditions as in Example 1 are drawn and the simultaneous knitting process is performed, and then circular knitting is performed. I evaluated the texture. Regarding the texture, a sensory test was carried out in five stages on the size of the waist and the goodness of the surface touch, which is mainly soft, and the results are summarized in Table 3. As is clear from the table, the filament (A) that constitutes the core portion preferably has a single yarn denier of about 1 to 10 d, and the filament (B) is divided and then the ultrafine false twist filament has about single yarn denier.
It was judged that it is preferable to be 0.7 dr or less in terms of texture.

In Example 4 and Comparative Example 9 Δn = 22 × 10 and undrawn ^-3 ～25～10 ^-3 which is a PET 150d / 24f of filaments (A), the composite ratio of the nylon 6 / PET 1/2 Yes, an undrawn yarn of a composite multifilament (B) of 152d / 24f having the same shape as that used in Example 1 obtained by using a composite polymer having 4 layers of nylon 6 and 5 layers of PET at a spinning speed of 1,500 m / min. Combined with (A component ratio 50%), spindle false twisting process temperature 180 ℃, set false twist number 2,250
It was processed at T / M and a draw ratio of 2.0 and air-entangled under the same conditions as in Example 1, and this processed yarn was circular knitted, relaxed and dyed under the same conditions as in Example 1.

As Comparative Example 9, multifilament (A) drawn yarn
37.5d / 12f and multi-composite filament (B) drawn yarn 37.
5d / 12f were combined and processed with false twist temperature of 180 ° C, set false twist number of 3,200, and overheat rate of 0%, and air entanglement was performed. Next, the mixed woven false twisted yarn and the 75d / 24f PET filament (C) were plied together so that the twist number would be 200 T / M. Circular knitting, relaxing and dyeing were performed on this plied yarn in the same manner. Table 4 shows the hand and appearance of this comparative example after dyeing together with Example 4.

As described above, in Example 4, a knitted fabric having a soft touch on the surface and having a yarn-like appearance and having no stain was obtained, but in Comparative Example 9, the knitted fabric was hard and had a stain on the surface. .

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinji Yamaguchi 1621 Sakazu, Kurashiki City, Okayama Prefecture Kuraray Co., Ltd. The referee body of the referee, Harumiya Miyamoto, Judge, Yukie Sato, Kazuo Hirata (56) References 57-42936 (JP, A) JP-A-57-42935 (JP, A)

Claims (2)

[Claims] 1. A multifilament unstretched yarn of polyester and a flat composite multifilament unstretched yarn of polyester and polyamide are combined, and this is simultaneously drawn and false twisted to divide the composite multifilament, and then interlaced. A processed yarn having a core or structure obtained by treatment or Taslan treatment, wherein a multifilament having 85% by mole or more of repeating units composed of ethylene terephthalate units and having a single fiber fineness of 1 to 10 d 70% by weight is present in the core part, and in the sheath part, multi-fine filaments of polyester and polyamide with single fiber fineness of 0.7d or less
A processed yarn having a bulky entangled core and structure, which is present in an amount of 30% by weight, has an entanglement pitch between these filaments of 10 cm or less, and has substantially no feathers and no dyeing spots. 2. Δn10 × 10 ⁻³ to 70 × 10 ⁻³ , single fiber fineness of 1 to 1.
Multifilament (A) in which 85 mol% or more of the repeating units are 0d and are composed of ethylene terephthalate units.
30-70% by weight of the undrawn yarn, and 70% -30% by weight of the multi-composite filament (B) of polyester and polyamide in which the single fiber fineness after splitting is 0.7d or less. The multi-composite filament (B) is divided by intertwisting so as to satisfy the following conditions [I] to [III], and then the multi-composite filament (B) is divided. A process for producing a bulky entangled core or structured processed yarn, which is characterized by being treated or treated with Taslan. −2.32Δn + 0.261 <logR <−5.22Δn + 0.588 ... ・
・ [I] 5 × 10 ⁴ Δn + 200 ≦ V ≦ 5 × 10 ⁴ Δn + 600
[II] 0.6 Tm ≤ T ≤ 0.9 Tm ... [III] where Δn is the average birefringence of (A), R is the draw ratio (times), and V is the spinning speed (m) of (B). / Min), T is the false twist temperature (° C), and Tm is the melting point (° C) of the low-melting filament among (A) and (B).