JP2833072B2 - Polyester mixed multifilament - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a silk-like polyester mixed multifilament, and more particularly, to a flexural elasticity, a bulkiness, a swelling feeling, a dry touch, and a gloss and squeaking. The present invention relates to a novel polyester mixed multifilament having a feeling.

(Prior Art) It is well known that a different shrinkage mixed fiber yarn is effective as a means for obtaining silk-like polyester filaments, and that a warm and rich bulky fabric can be obtained.
However, conventionally known different shrinkage mixed fiber yarns cannot achieve warm taste and bulkiness unless the difference in shrinkage ratio of hot water is increased, so that at least 15% or more, preferably 20% or more. It was necessary to combine multifilaments that provided a difference. However, multifilaments with large hot water shrinkage are easy to be cured by heat treatment. There is a problem that a yarn length difference is easily generated, and there is a problem that the yarn is caught by a guide or the like, so that the process passage property is deteriorated, or the use is restricted. Also, as shown in Japanese Patent Publication No. 44-18933, an additive close to the refractive index of polyester is added to the different shrinkage mixed fiber, and a large number of fine irregularities are imparted to the fiber surface as disclosed in JP-A-54-120728. Have been proposed, but the color tone,
Although the tactile sensation and the deep color were improved, the gloss became rather dull, and it was necessary to provide the same difference in shrinkage of hot water as before in order to improve the swelling and bulkiness.

(Problems to be Solved by the Invention) The present invention eliminates the drawbacks of the conventional different shrinkage mixed fiber, and has excellent flexing resilience, bulkiness, and swelling even with a relatively small difference in shrinkage ratio of hot water. Further, it is an object of the present invention to provide a polyester mixed multifilament which is glossy and squeaky and has good post-process passability.

(Means for Solving the Problems) That is, in order to solve the above-mentioned problems, the present invention provides a hot water of a multifilament (A) having a hot water shrinkage difference of 5% or more and a highest hot water shrinkage ratio. A mixed multifilament comprising a plurality of multifilaments having a shrinkage of 8% or more and having substantially no difference in yarn length and having a degree of entanglement of 20 to 100 / m, wherein at least hot water of the mixed multifilament is used. The multifilament (B) having a low shrinkage ratio has a denier ratio of the mixed multifilament of 30% or more and 5 filaments or more, and the filament denier has a denier of 7 denier or less and has a irregular cross-section multifilament having a flatness of 3 or more. A polyester mixed multifilament characterized in that the filament has an irregularity of filament angle of 20% or more. (Here, the irregularity of the filament angle is represented by the CV value of the angle of the long axis of the flat filament with respect to the reference line.) The polyester yarn referred to in the present invention is terephthalic acid or an ester-forming derivative thereof mainly containing a dicarboxylic acid. The target component is a polyester having a glycol selected from ethylene glycol and 1,4-butanediol or an ester-forming derivative thereof as a main glycol component.

A part of the dicarboxylic acid component may be replaced with, for example, a mono-alkali metal salt of 5-sulfoisophthalic acid, isophthalic acid, diphenyldicarboxylic acid, adipic acid, sebacic acid, P-oxybenzoic acid, or the like. Some may be replaced by dihydric alcohols such as diethylene glycol and 1,4-hydroxymethylcyclohexane.

Further, a polyalkylene oxide-based compound such as polyethylene glycol may be copolymerized in an amount of 7% by weight or less with respect to the produced polyester to impart antistatic properties. It is preferable to make the dye easily dyeable by copolymerizing a glycol represented by the following general formula.

_{HO (C K H zK O)} m R-O (C lH z l) n H ( in the above formula R 2 divalent aliphatic acid hydrocarbon group having 4-20 carbon atoms, K, l are the same or different Integers from 2 to 4, m, n
Are the same or different integers and 1 ≦ (m + n) ≦ 10).

Also, a small amount of another polymer may be blended to form a modified polyester, and furthermore, a color inhibitor, a catalyst,
Etc. can be used as appropriate.

In the constitution of the polyester mixed multifilament of the present invention, the difference in the hot water shrinkage (%) is 5% or more, and the hot water shrinkage of the multifilament (A) having the highest hot water shrinkage is 8%.
% Or more of polyester multifilaments having substantially no yarn length difference are entangled at 20 to 100 k / m, and at least the multifilament (B) having a low hot water shrinkage rate is a filament. Denier is 7 deniers or less, flatness of 5 filaments or more 3
The multifilament having the irregular cross section as described above, and the major axis direction of the irregular cross section filament is oriented in an irregular direction, and the denier ratio of the mixed multifilament is 30%.
The combination requirements described above are particularly important in achieving the object of the present invention as described below.

The hot water shrinkage ratio of the multifilament and the difference in the hot water shrinkage ratio in the present invention are important factors which determine the feeling of the fabric, especially the swelling and warmness as described above, and the difference in the hot water shrinkage ratio is 5% or more. It is essential that the hot water shrinkage of the multifilament (A) having the highest hot water shrinkage is 8% or more.

The polyester mixed multifilament of the present invention contains a filament having a special cross-sectional shape, which will be described later, in at least the outer layer portion, and has a much smaller amount of hot water because the filaments are arranged in a different manner as compared with the conventionally known hetero-shrinkage mixed fiber. A swelling and warm taste can be obtained even with a difference in shrinkage,
However, 5% or more is essential, and if it is less than 5%, a satisfactory feeling cannot be obtained.

However, if the difference in shrinkage ratio of the hot water is too large, the difference in physical properties becomes large, and irritability and yarn length difference due to dyeing easily occur, and it is easy to catch in the rewinding and weaving process, and 50% or less, more preferably 40% or less.
% Or less is preferred, but is not particularly limited when used for special purposes. However, for general clothing, a satisfactory value can be obtained at a low value of 5 to 15%.

Next, it is essential that the polyester mixed filament yarn of the present invention has substantially no yarn length difference. The phrase "having substantially no difference in yarn length" means that the difference in yarn length when wound without entanglement treatment is 5% or less. If it exceeds 5%, a loop is generated, and particularly when the number of confounds is small, it is liable to be caught by a guide or the like, and a problem in unwinding property such as rewinding is liable to occur.

Next, the hot water shrinkage of the multifilament (A) must be 8% or more. In particular, in order to secure the texture of the woven fabric, it is necessary to have a certain width in the dyeing and finishing step, and if it is less than 8%, the texture becomes poor. Moreover, since a plurality of multifilaments are mixed, the hot water shrinkage of the polyester mixed multifilament is lower than this, so that the hot water shrinkage of the mixed fiber yarn is 5% or more, more preferably 8% or more. It is preferable to select the hot water shrinkage ratio of the multifilament (A) so as to be as follows.

For this purpose, the multifilament having a hot water shrinkage of 8% or more preferably has a denier ratio of 70 to 30% in the mixed fiber yarn, although it depends on the hot water shrinkage and the hot water shrinkage stress.

Next, the cross section of the filament of the multifilament (B) having a low hot water shrinkage ratio constituting the polyester mixed multifilament of the present invention must have a flatness of 3 or more.

Further, it is preferable that the number is 4 or more. However, if it is too large, the irregularity of the angle becomes small and it becomes easy to align in one direction.

Here, the cross section of the irregularly shaped filament having a flatness of 3 or more of the present invention is basically an ellipse or a rectangle as shown in FIGS. 1a and 1b, and the flatness in this case is represented by a / b.

The woven fabric composed of only the multifilaments having a large flatness in this way is arranged in the direction in which all the filaments are most stable, that is, in the direction in which the long axis direction is parallel to the woven fabric surface, due to the bending moment of the filaments. The bending property is a very soft touch which cannot be considered from denier, and has a peculiar luster because the major axis surface is aligned with the surface.

In the present invention, the filaments having a large flatness are arranged irregularly in the axial direction, so that the filaments are moderate in size, and the gap between the filaments together with the waist (bending resilience) is increased, so that the bulkiness, swelling and warmth are felt. It is what embodies.

In other words, the multifilament having a low heat shrinkage and a large flatness and the other multifilament having a high heat shrinkage are entangled, but the filaments having a large flatness when entangled are irregular in the axial direction. It is entangled and fixed in a different direction. At this time, the irregularity of the flat filament according to the definition described later must be 20% or more.

If it is less than 20%, the angle becomes substantially the same and there is no difference from the above-mentioned case of using the flat filament alone, and the voids between the filaments are small, resulting in inferior elasticity and warmth. It is preferably at least 30%, more preferably at least 40%. When subjected to normal heat treatment after being made into a fabric in this state, the filament having a large flatness sags due to the difference in shrinkage, but the long axis direction is irregular due to the restrained state, and the space in the fabric further increases. It becomes large, very bulky, warm and moderately taut, and has a waist.

Moreover, the end of the long axis part of some filaments also appears on the cloth surface, so that it has an appropriate dry touch, and the long axis direction of the flat yarn is in an irregular direction, so a unique natural color tone, Gloss is obtained.

In order to fix the angle of the flat filament in an irregular state in this way, the degree of entanglement must be at least 20 pcs / m, but if it exceeds 100 pcs / m, moire spots are likely to appear depending on the fabric structure Therefore, they are excluded from the present invention.

In order to further fix and increase the irregularity of the direction of the flat yarn, it is effective to twist the yarn. It ’s easy to take The following is preferred.

Also, the shape of the flat yarn may be any as long as it can provide the effect as described in detail so far, for example, the end may be partially bent as in 1-c, d, e, or may have a bulge portion, Although it may be entirely bent as in e, the feeling, color tone and gloss of the present invention cannot be obtained unless the length of the substantially linear portion l is at least 2.5 times the minor axis a.

The flatness of 1-c, d, and e is the same as 1-a and b, and is represented by the ratio of the short axis length at the substantially central portion of the long axis of the filament to the entire long axis length. Further, the flat yarn may have a hollow part in one part.

Next, this irregular shaped filament with a large flatness is 4 ~
7 denier and an unusually thick filament for clothing compared to ordinary clothing filaments are more preferable because they can exhibit more effects. However, if it exceeds 7 denier, even if the major axis is in an irregular direction as in the present invention, it feels rough. Is excluded from the present invention. Further, if the filament denier is too thin, the effect of the present invention cannot be exhibited, so that the denier is preferably 1 denier or more, preferably 3 denier or more, more preferably 4 denier or more.

Next, the effect of the present invention described in detail so far is that the flat yarn preferably has a denier ratio of 30% or more of the mixed multifilament.
Since it can not be demonstrated unless it is more than 40% and 5 or more,
Less than the above are excluded from the present invention.

The multifilament having a high heat shrinkage is not particularly limited, and may be a flat yarn, another deformed yarn, or a hollow fiber. However, the flat yarn having a high entanglement and heat shrinkage has few projections from the twist (rotation) surface. Those closer to a round cross section are preferred.

Further, the woven fabric using the polyester mixed multifilament for the warp and / or weft has sufficient voids as described in detail so far, and although it has bulky, bulky, warm taste and squeaky feeling, it has the same texture as a normal textured fabric. Further effects can be exhibited by performing the same weight reduction processing.

(Examples) Examples will be described below in detail, but the present invention is not limited to these examples.

Examples 1-2, Comparative Examples 1-6 A normal polyester polymer consisting essentially of repeating ethylene terephthalate alone was used in various shapes of spinning nozzles, for example, FIG. Then, the polyester polymer discharge amount, spinning speed, and drawing conditions were changed in a conventional manner to obtain polyester filaments having the cross section, denier, number of filaments, and SHW shown in Table 1. These polyester filaments were combined as shown in Table 1 to obtain a mixed multifilament shown in Table 1. The confounding treatment was performed by using an air nozzle FG-1 manufactured by Fiber Guide, and changing the confounding air ratio and tension to change the number of confounding.

 The measuring method implemented in the present invention is as follows.

Hot water shrinkage (SHW) The following was determined according to JIS-L-1013. A wrap reel having an initial load of 1/10 g / denier is taken on a wrap reel having a frame length of 1 m, and an eight-turn wrap is taken. A load of 1/30 g / denier is applied to the wrap and the length l ₀ (mm) is measured. Then, the load is removed, and the plate is immersed in scab boiling water for 30 minutes while applying a load of 1/1000 g / denier.
After that, remove the scallop from the boiling water, cool it down,
A denier load is applied and the length l ₁ (mm) is measured. SHW is calculated by the following formula.

Degree of confounding Take out a yarn of appropriate length and suspend it vertically by applying a load of 1 / 10g / denier to the lower end. Then, an appropriate needle is pulled out of the yarn, and the distance l (cm) of slowly lifting and moving until the load is lifted is measured 100 times, and the average value l (cm) is obtained and calculated by the following equation.

Flatness A section cut out from a sample filament embedded in an acrylic resin with a microtome is photographed at an appropriate magnification, and calculated by a / b shown in FIG.

Irregularity of filament angle The mixed multifilament was photographed in a manner similar to that described above so that at least all flat filaments were inserted, and as shown in FIG. 3, an angle of 0 to 90 ° from the reference line was determined for all flat filaments, and then the filament angle was determined. Irregularity cv (%) =
Calculated as σ / × 100.

Next, this polyester mixed multifilament is used for warp and weft to make a plain weave, scoured by a usual method, treated with 20% weight loss with NaOH, dyed, and final set, and the warp density is 160 yarns / in and the weft density is 88. This was a finished fabric of book / in.

The finished fabric was evaluated organoleptically in terms of tactile sensation, elasticity, gloss, squeaky feeling, and processability.

In Examples 1 and 2, the feeling, squeakiness, color tone, gloss, and process passability were all good within the preferred ranges of the present invention. In Comparative Example 1, since the flatness was small, the bulkiness and the warmth were both small, there was no squeaky feeling, and the color tone and gloss were not good.

In Comparative Example 2, the multifilament having a smaller ΔSHW and a higher hot water shrinkage also had a smaller hot water shrinkage, so that the multifilament swelled more than Comparative Example 1, lacked a warm taste, and had other inferior properties. In Comparative Example 3, since the yarn length difference was large and the degree of entanglement was small, both the unwinding property and the weaving property were poor, and only a woven fabric having many defects was obtained. In Comparative Example 4, the feeling, gloss and color tone of the flat yarn could not be obtained because the ratio of the flat yarn was small, and the process passing property was good or moire spots appeared because the degree of entanglement was large.

In Comparative Example 5, although the number of flat filaments was small and the degree of irregularity was large, the feeling, squeakiness and gloss were inferior. Further, since the single filament denier of the flat filament was thick, the feeling was unusually cored, which was not preferable.

In Comparative Example 6, the irregularity of the flat filament was small, resulting in a bulky feeling, lack of warmth, and a poor feeling.

(Effect of the Invention) As described above, the polyester mixed multifilament of the present invention is superior in bending elasticity, bulkiness and swelling feeling as compared with the conventional hetero-shrinkage mixed fiber yarn, and has a dry touch and gloss and squeaky feeling. It has a remarkable effect that it has excellent processability.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a typical example of a flat filament used in a polyester mixed multifilament of the present invention.
FIG. 3 is a plan view of a typical example of a spinning nozzle for flat filaments, and FIG. 3 is an explanatory diagram of a typical example showing a distribution state of filaments of the mixed multifilament of the present invention. Measurement angle). a: long axis, b: short axis.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D02G 1/00-3/48 D01D 5/253 D01F 6/62

Claims (1)

(57) [Claims] The difference in the hot water shrinkage is 5% or more, and the hot water shrinkage of the multifilament (A) having the highest hot water shrinkage is 8%.
A mixed multifilament having a degree of entanglement of 20 to 100 pieces / m and comprising a plurality of multifilaments having substantially no yarn length difference and having a low hot water shrinkage ratio at least. The filament (B) is a mixed multifilament having a denier ratio of 30% or more and 5 or more filaments, a filament denier of 7 denier or less, a flat cross section of 3 or more irregular shaped multifilaments, and the filament angle of the irregular shaped filament is not sufficient. Polyester-mixed multifilaments characterized by being distributed at a degree of order of 20% or more. (Here, the irregularity of the filament angle is represented by the CV value of the angle of the long axis of the flat filament with respect to the reference line.)