JP2000314038A - Bulky composite false twist textured yarn and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bulky composite false twist textured yarn capable of maintaining a fullness feeling, a soft feeling, deep color properties and repulsiveness and improved in bulkiness without fear of a pressing mark or shininess at the time of ironing by carrying out a false twist texturing of a specific air interlaced yarn at a prescribed false twist heat-setting temperature. SOLUTION: An air interlaced yarn such as an interlaced yarn or a Taslan (R) yarn prepared by carrying out a relaxing heat treatment of a raw yarn having 0.2-0.45 birefringence ratio (Δn) at 120-190 deg.C temperature in 2-15% relaxing ratio, providing a self-extensible polyester intermediately oriented yarn, arranging the resultant yarn as a sheath yarn, arranging a polyester-based highly shrinkable yarn having a higher shrinkage percentage in boiling water than that of the sheath yarn by >=3% as a core yarn is subjected to a false twist texturing at 100-190 deg.C false twist heat-setting temperature to produce a bulky composite false twist textured yarn having the total percentage of crimp (TC) at a low level of <=15%. Furthermore, the difference in shrinkage percentage in boiling water between the core and sheath yarns is preferably within the range of 10-30%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bulky composite false twisted yarn, and more particularly to a bulky composite false twisted yarn, in particular, which has improved bulkiness in addition to swelling, softness, deep color, and resilience, and which is improved when ironing. The present invention relates to a bulky composite false-twisted yarn having no fear of "hit" or "shininess" and a method for producing the same.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for a woven fabric having bulkiness, swelling, deep color, and resilience as a material for clothing, and a bulky composite false twisted yarn providing such a woven fabric. .

[0003] For this reason, Japanese Patent No. 2560170 and Japanese Patent No. 2538735 disclose a heat treatment for relaxing a semi-drawn polyester yarn (intermediate oriented yarn) having a shrinkage ratio of boiling water of 5% or less and a single fiber fineness of 2 de or more as a sheath yarn. Using the yarn as the other core yarn, the boiling water shrinkage is 8% or more, and the single fiber fineness is 3 de or more.
It has been proposed to express the above four characteristics by using a Taslan or interlaced type air entangled yarn provided with a 10.0 de high shrinkage polyester yarn.

Indeed, according to this proposal, the desired texture is expressed in the final fabric, and the single fiber fineness of the sheath yarn is 2d.
"e" or more, "hit" when ironing
Is also disclosed. However, the presence of loops and tarmi that are inevitably generated due to the unique yarn structure of Taslan or interlace sometimes causes "hits" and "shininess" when ironing, thereby deteriorating the original characteristics of the fabric. It turned out that it not only erased the book, but also degraded the end product itself. At the same time, in this type of yarn structure, the core portion is relatively harder than the sheath portion, and the softness of the yarn as a whole still remains as one step.

The inventor of the present invention has studied a processed yarn material that does not cause such a “hit” or “shininess” when ironing, and as a result, for example, Japanese Patent Publication No. 61-361.
No. 03, namely a Taslan-type air-entangled yarn of a polyester drawn yarn and a polyester intermediate oriented yarn is subjected to false twisting under an underfeed at a false twist heat fixing temperature exceeding 200 ° C. It was confirmed that the bulky composite false twisted yarn obtained as described above corresponded to this. However, as described above, since this material is composed of a drawn polyester yarn and a polyester intermediate oriented yarn, the softness is inferior to the former, and it is not possible to sufficiently meet the demand for deep color, which is preferred by consumers. , The disadvantage.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to improve the bulkiness, while maintaining the conventional level of swelling, softness, deep color and resilience, and at the same time to improve the "hit" when ironing. An object of the present invention is to provide a bulky composite textured yarn free from concerns of "" and "shininess".

[0007]

According to the present invention, a self-extensible polyester intermediate oriented yarn is used as a sheath yarn, and a polyester-based high shrinkage having a boiling water shrinkage of at least 3% higher than the boiling water shrinkage of the yarn. A false twisted yarn obtained from an air-entangled yarn in which the yarn is arranged as a core yarn, and has a total crimp rate of (T
A bulky composite false twisted yarn characterized in that C) is at a low level of 5% or less, and a self-extensible polyester intermediate oriented yarn is used as a sheath yarn, and at least 3% higher than the boiling water shrinkage of the yarn. An air-entangled yarn in which a polyester-based high shrinkage yarn having a high boiling water shrinkage ratio is arranged as a core yarn is used at 100 ° C to 190 ° C.
The present invention provides a method for producing a bulky composite false twisted yarn, which is subjected to false twisting at a false twist heat setting temperature of ° C.

Here, the background that led to the adoption of the above configuration in the present invention will be described. First, in the present invention, the composite false twisted yarn described in the above-mentioned Japanese Patent No. 2560170 when ironing is used. It started by investigating the cause of “hit” and “shininess”. As a result, the "hit" and "shininess" at the time of ironing are caused by the loops and tarmi peculiar to the Taslan yarn existing on the surface of the processed yarn, and also by the tarmi generated on the yarn surface of the interlaced yarn. It has been found that the filaments constituting the tarmi are in a non-crimped state, that is, in a flat yarn state, which itself increases "hit" and "shininess" during ironing.

In view of the above, the present inventor has conducted intensive studies on the elimination of "hit" and "shininess" during ironing. As a result, the air-entangled yarn using the conventional raw yarn is slightly crimped, and the raw silk state is also reduced. It is extremely useful to provide a crimp that can be substantially maintained, specifically, a crimp of 5% or less, preferably 3% or less in terms of the total crimp ratio (TC). It was clarified that it would be further emphasized.

Hereinafter, the configuration of the present invention will be described.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The bulky composite false twisted yarn of the present invention is
As described above, the air-entangled yarn in which the self-stretching polyester intermediate oriented yarn is used as the sheath yarn and the polyester-based high shrinkage yarn is used as the core yarn is false twisted at a false twist heat fixing temperature of 100 ° C to 190 ° C. And a high shrinkage yarn obtained in the above method.

Here, the self-extensible polyester intermediate oriented yarn is generally melted and discharged from a polyester such as polyethylene terephthalate, polybutylene terephthalate, or polyethylene naphthalate to reach 2,200 m / min.
The birefringence (△) obtained at a take-off speed of 4500 m / min
n) a yarn of from 0.02 to 0.45, i.e. a middle oriented yarn, at a relaxation rate of 2 to 15% at a temperature of 120C to 190C (for contact type heaters) or 160C to 210C.
(In the case of a non-contact type heater) obtained by relaxation heat treatment.
At this time, it is also useful from the viewpoint of a different color effect that the intermediate oriented yarn itself or its constituent filaments have a thick and thin shape such as thick and thin-yarn.

On the other hand, polyester-based high shrinkage yarns are generally obtained by copolymerizing polyester such as polyethylene terephthalate, polybutylene terephthalate or polyethylene naphthalate, especially polyethylene terephthalate with isophthalic acid, bisphenol-A or aliphatic dicarboxylic acid. Obtained from a copolymer consisting of
A filament yarn having a boiling water shrinkage in the range of 8 to 35% is preferably used.

Next, both yarns are subjected to an air entanglement treatment. The treatment may be carried out by any of an interlace treatment and a Taslan treatment.
What is necessary is just to give the confound of about 100 pieces / m. What is important is the overfeed rate between the sheath yarn and the core yarn. Generally, the overfeed ratio between the sheath yarn and the core yarn is set to 10% or less and that of the core yarn to 1.0% or less. It is preferable to maintain the rate difference in the range of 1.0% to 9.0%.

At the time of entanglement, the mixing ratio of the sheath yarn and the core yarn may be in the range of 25:75 to 75:25 by weight. At this time, the single fiber fineness of the sheath yarn is about 2 to 4 de, that of the core yarn is about 3.0 to 10.0 de, preferably about 5 to 8 de, and the latter is 1.5 d more than the former.
When adjusted so as to be larger than e, a processed yarn having a high resilience can be obtained. As the total denier of the processed yarn,
Usually, about 100 to 350 de is preferable. Further, the cross-sectional shape of the monofilament constituting the core yarn or the sheath yarn may be appropriately determined from a round cross section to an irregular cross section as necessary.

In the final stage of the production of the bulky composite false twisting yarn,
The entangled yarn is subjected to false twisting. What is important here is the heat setting temperature of the false twist, which is to be maintained in the range of 100 ° C. to 190 ° C. based on the temperature of the contact heater. If this temperature is less than 100 ° C., the loop generated on the surface of the processed yarn, crimping to the tarmi is insufficient,
Does not contribute to eliminating "hits" or "shininess" when ironing. On the other hand, when this temperature exceeds 190 ° C., crimping of false twist is excessively developed, and the characteristics of raw silk are lost.

That is, the heat setting temperature in this range allows the processed yarn to be slightly and delicately crimped while maintaining the characteristics of the texture and physical properties of the processed yarn using raw silk recommended by the two patents mentioned at the beginning. Is to be provided. Here, the level of “mild and subtle crimp” is 5% or less, preferably 3 or more and 1% or more, using “total crimp rate (TC)” commonly used in the art as a scale. The bulky composite false twisted yarn obtained in this manner is twisted as required, and is subjected to a weaving and knitting process, and then subjected to a bald alkali weight reduction treatment in a dyeing and finishing process. At this time, in a finishing treatment at around 130 ° C., for example, in a relaxation treatment, the self-extensibility of the polyester intermediate oriented yarn is developed, a feeling of swelling is expressed, and the molecular structure of the yarn is relaxed. A markedly increased soft dyed fabric rich in deep color can be obtained.

[0018]

The bulky composite false twist textured yarn of the present invention has the characteristics of the textured yarn using conventional raw silk, namely, bulkiness,
While maintaining a soft feeling, resilience and deep color,
In addition, light crimps are added to improve the bulkiness, and the structure has no fear of "hit" or "shininess" when ironing. At this time, since the boiling water shrinkage of the core yarn is larger than that of the sheath yarn, the bulkiness due to the different shrinkage difference is further emphasized.

[0019]

The present invention will be described more specifically with reference to the following examples.

Example 1 As a core yarn for forming an air-entangled yarn, a 75-de / 15-fil polyethylene terephthalate filament yarn (boiling water shrinkage: 21%) containing 6 mol% of isophthalic acid as a copolymerization component was prepared. did.
Further, as the sheath yarn forming the confounding yarn, the birefringence index (△
n) A relaxation heat treatment is performed on a polyethylene terephthalate intermediate oriented yarn (80 de / 36 film) having a relaxation rate (overfeed rate) of 12% while running on a contact type heater heated to 160 ° C. at a relaxation rate of 12%. Thus, a self-extensible intermediate oriented yarn having a boiling water shrinkage of 3.4% was obtained.

Next, the overfeed ratio of the core yarn is set to 1.5.
% And that of the sheath yarn were adjusted to 4.5%, and both yarns were introduced into an interlace nozzle (pressurized air pressure: 3.5 kg: gauge pressure) to obtain an air entangled yarn having a degree of entanglement of 78.

This air entangled yarn was used for a false twist of 1800 T / M,
Heater (contact type) is subjected to false twisting at 150 ° C.
A bulky composite false twisted yarn having a TC of 1.9% was obtained.

Next, using a twisted yarn having a boiling water shrinkage of 1600 T / M as the bulky composite false twisted yarn, a green fabric having a satin finish (woven density: 160 / whale size, weft 90 / whale size) was obtained. . This was subjected to an alkali treatment at a weight loss rate of 20%, and then dyed black by a conventional method, followed by finishing treatment.

The obtained woven fabric maintains the same softness, swelling, resilience and deep color as the conventional products, while emphasizing the bulkiness not found in the conventional products. It had a texture.

Finally, the woven fabric was ironed at 220 ° C., and examined for “hit” and “shininess” during ironing. As a result, no such spot was found.

Comparative Example 1 The same operation as in Example 1 was repeated, except that the air entanglement process was changed to the Taslan process and the false twisting process was omitted. The value corresponding to the TC of the obtained bulky composite processed yarn is 0.3%, and the woven fabric made of this yarn exhibits softness, deep color, and resilience, but is bulkier than the woven fabric of Example 1. The sex was clearly inferior. In addition, "atari" and "shininess" occurred during ironing of this fabric.

Comparative Example 2 The same operation as in Example 1 was repeated, except that the heat treatment for relaxing the polyester intermediate oriented yarn was omitted, and the false twist heat setting temperature was changed to 210 ° C. The TC of the obtained composite bulky false twisted yarn is 6.9%, and the woven fabric obtained therefrom exhibits resilience, but is softer, deeper in color and more bulky than the woven fabric of Example 1. Was clearly inferior in

[0028]

According to the present invention, light crimping can be provided to the processed yarn structure using conventional raw silk as long as the characteristics (softness, swelling, resilience and deep color) of the processed yarn structure are not lost. A bulky composite false-twisted yarn that emphasizes bulkiness and is free from concerns about "hits" and "shininess" when ironing because the bulky structure is superimposed by utilizing the different shrinkage between the core yarn and the sheath yarn Therefore, the concern that the quality at the stage of the final sewn product is deteriorated as compared with the related art is eliminated.

Claims (13)

[Claims] 1. An air-entangled yarn in which a self-extensible polyester intermediate oriented yarn is used as a sheath yarn and a polyester-based high shrinkage yarn having a boiling water shrinkage ratio at least 3% higher than the boiling water shrinkage ratio of the yarn is arranged as a core yarn. A bulky composite false twisting yarn, characterized in that the total crimp ratio (TC) is at a low level of 5% or less. 2. The bulky composite false twisted yarn according to claim 1, wherein the high shrinkage yarn has a boiling water shrinkage of 8 to 35%. 3. The high-shrink yarn has a boiling water shrinkage of 10 to 30.
%, The bulky composite false twisted yarn according to 2 above. 4. The shrinkage ratio of boiling water between the core yarn and the sheath yarn is 3 to 20%.
The bulky composite false twisted yarn according to claim 1, 2 or 3, wherein 5. The self-stretching polyester intermediate oriented yarn is obtained by heating a raw yarn having a birefringence (Δn) of 0.2 to 0.45 at a relaxation temperature of 2 to 15% to 120 to 190 ° C. The bulky composite false twisted yarn according to claim 1, which is obtained by a relaxation heat treatment at a temperature of: 6. The bulky composite false twisted yarn according to claim 1, wherein the entangled yarn is an interlaced yarn or a Taslan yarn. 7. An air-entangled yarn in which a self-extensible polyester intermediate oriented yarn is used as a sheath yarn, and a polyester-based high shrinkage yarn having a boiling water shrinkage ratio at least 3% higher than the boiling water shrinkage ratio of the yarn is arranged as a core yarn. Is subjected to false twisting at a false twisting heat setting temperature of 100 ° C to 190 ° C. 8. The method for producing a bulky composite false twisted yarn according to claim 7, wherein the boiling water shrinkage of the high shrinkage yarn is in the range of 8 to 35%. 9. The high shrinkage yarn having a boiling water shrinkage of 10 to 30.
%, The method for producing a bulky composite false twisted yarn according to 8 above. 10. The boiling water shrinkage ratio between the core yarn and the sheath yarn is 3 to 20.
%. The method for producing a bulky composite false twisted yarn according to claim 7, 8 or 9. 11. The self-stretching polyester intermediate oriented yarn is prepared by heating a raw yarn having a birefringence (Δn) of 0.2 to 0.45 at a relaxation rate of 2 to 15% to 120 ° C. to 190 ° C. The method for producing a bulky composite false twisted yarn according to claim 7, which is obtained by relaxation heat treatment at a temperature of: 12. The method according to claim 1, wherein the entangled yarn is an interlaced yarn or a Taslan yarn. 13. A false twist heat setting temperature of 110 ° C. to 180 ° C.
The method for producing a bulky composite false twisted yarn according to claim 7, wherein