JPH1112877A - Production of woven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a woven fabric using a substantially non-twisted polytrimethylene terephthalate multifilament as a warp, by which the rapid weaving of woven fabric good in fabric quality can be attained in high production efficiency. SOLUTION: This method for producing a woven fabric by using a substantially non-twisted polytrimethylene terephthalate multifilament as a warp is carried out so that (A) the number of interlace by a fluid treatment and (B) the attaching amount of a paste may satisfy the formulas 5/m<=(A)<=20/m, and 1 wt.%<=(B)<=3 wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a woven fabric using polytrimethylene terephthalate multifilament yarn for warp.

[0002]

2. Description of the Related Art A woven fabric using a substantially untwisted polytrimethylene terephthalate multifilament yarn as a warp yarn is known as follows.
There is a problem in that the surface of the woven fabric becomes uneven, or a strip defect appears to be streaked as if it is strongly pulled. In particular, recent weaving speeding up (operating at 300 to 500 rpm rapier room or 400 to 800 rpm is possible. Weaving with air and water jet loom)
This problem is growing.

The above problem does not occur in conventional synthetic fibers typified by polyethylene terephthalate fiber, but is a problem peculiar to a woven fabric using a polytrimethylene terephthalate multifilament yarn as a warp.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for producing a high quality woven fabric by using a substantially untwisted polytrimethylene terephthalate multifilament yarn as a warp. I do.

[0005]

In order to solve the above-mentioned problems, the inventors of the present invention have developed a mechanism of the occurrence of chipping defects, various bunching means such as twisting, gluing and entanglement, combinations thereof, and the amount of glue attached. As a result of thorough and detailed examination of the relationship with such numerical ranges, the present inventors have found that such disadvantages are caused by the low Young's modulus and high elastic recovery of the polytrimethylene terephthalate multifilament yarn, and have reached the present invention.

More specifically, strain is accumulated in the warp due to the low Young's modulus of the polytrimethylene terephthalate multifilament yarn due to the tension applied when the warp is opened in the sizing step or the weaving step, or when the warp rubs against a reed or heald. When it is woven as it is, it is organized into a woven fabric and then acts to return with a high elastic recovery rate, and the woven fabric surface becomes uneven, or a strip defect that looks like a streak as if pulled strongly occurs The inventors have found that the present invention has been achieved.

That is, the present invention provides a woven fabric characterized in that a warp yarn is a polytrimethylene terephthalate multifilament yarn having substantially no twist and which satisfies the following requirements (A) and (B). Manufacturing method. (A) Number of confounds: 5 to 20 pieces / m (B) Adhesive adhering amount: 1 to 3% by weight In the present invention, the polytrimethylene terephthalate multifilament yarn is a polyester having a trimethylene terephthalate unit as a main repeating unit. Fiber refers to a fiber having a trimethylene terephthalate unit of about 50 mol% or more, preferably 70 mol% or more, more preferably 80 mol% or more, and further preferably 90 mol% or more. Therefore, the total amount of the other acid component and / or glycol component as the third component is about 50 mol% or less, preferably 30 mol% or less, more preferably 20 mol% or less, and further preferably 1 mol% or less.
The polytrimethylene terephthalate contained in the range of 0 mol% or less is included.

[0008] Polytrimethylene terephthalate is synthesized by combining terephthalic acid or a functional derivative thereof with trimethylene glycol or a functional derivative thereof in the presence of a catalyst under appropriate reaction conditions. In this synthesis process, an appropriate one or two or more third components may be added to form a copolymerized polyester, or
Polyester other than polytrimethylene terephthalate such as polyethylene terephthalate, nylon, and polytrimethylene terephthalate may be separately synthesized, blended, or composite-spun (sheath core, side-by-side, etc.).

As the third component to be added, aliphatic dicarboxylic acids (oxalic acid, adipic acid, etc.), alicyclic dicarboxylic acids (cyclohexane dicarboxylic acid, etc.), aromatic dicarboxylic acids (isophthalic acid, sodium sulfoisophthalic acid, etc.) ), Aliphatic glycols (ethylene glycol, 1,2
-Propylene glycol, tetramethylene glycol, etc.), alicyclic glycols (cyclohexanediol, etc.), aromatic dioxy compounds (hydroquinone bisphenol A, etc.), aliphatic glycols containing aromatics (1,4
-Bis (β-hydroxyethoxy) benzene, etc.), polyether glycols (polyethylene glycol, polypropylene glycol, etc.), aliphatic oxycarboxylic acids (ω
-Oxycaproic acid), aromatic oxycarboxylic acids (P
-Oxybenzoic acid, etc.). Compounds having one or more ester-forming functional groups (such as benzoic acid or glycerin) can also be used as long as the polymer is substantially linear.

Further, matting agents such as titanium dioxide, stabilizers such as phosphoric acid, ultraviolet absorbers such as hydroxybenzophenone derivatives, crystallization nucleating agents such as talc, lubricating agents such as aerosil, and antioxidants such as hindered phenol derivatives. An oxidizing agent, a flame retardant, an antistatic agent, a pigment, a fluorescent brightener, an infrared absorber, an antifoaming agent, and the like may be contained. The spinning of the polytrimethylene terephthalate multifilament yarn in the present invention comprises:
After obtaining an undrawn yarn at a winding speed of about 1500 m / min,
Either a method of stretching by about 2 to 3.5 times, a direct drawing method in which a spinning-drawing step is directly connected, or a high-speed spinning method (spin draw or spin take-up method) with a winding speed of 5000 m / min or more is adopted. You may.

The polytrimethylene terephthalate multifilament yarn may be uniform in the length direction or thick and thin, and the cross section may be round, triangular, L-shaped or T-shaped.
It may be a polygonal type such as a type, a Y type, a W type, an eight leaf type, a flat shape, a dog bone type or the like, a multi leaf type, a hollow type or an irregular type. Furthermore, the polytrimethylene terephthalate multifilament yarn has a single yarn denier of 0.1 to
Multifilament raw yarn of about 5 denier (including ultrafine yarn), sweet twisted yarn to strong twisted yarn, mixed fiber yarn, false twisted yarn (including drawn false twisted yarn of POY, low temperature and / or low twist false twisted yarn), so-called Taslan processed yarn, etc. Fluid ejected yarn.

In addition, within the range not impairing the object of the present invention, usually within a range of 30% by weight or less, intermingling and blending with other fiber yarns (different shrinkage blending yarn with high shrinkage yarn, etc.), intertwisting It may be mixed by means such as composite false twisting (elongation false twist) or two-feed tanlan processing. In the present invention, the substantially non-twist means that no special twist is added except for the twist given by the stretching process or unwinding from the package, and is usually 100 T / m or less, preferably Means 50 T / m or less.

In the present invention, the number of entanglements of the warp is a value obtained by the following measuring method. If the number of entanglements is less than 5 / m, the convergence is reduced. At the same time, filament breakage, fluff, and loops occur, and if a large amount of gluing is not performed, weaving efficiency will be reduced. On the other hand, if the number of entanglements exceeds 20 yarns / m, the bundling property of the yarn is improved and the weaving efficiency is improved, but the crack defect occurs and the irritating defect is also conspicuous and lowers the quality of the woven fabric. Although the reason is not clear, when the distance between the confounding points is long (when the number of confounding is small), the warp distortion is dispersed and the crack defect is difficult to see, but when the distance between the confounding points is short (the number of confounding In the case where there is a large amount of warp, the strain of the warp is difficult to disperse, and it is considered that the tree defect is conspicuous.

Further, it is considered that the polytrimethylene terephthalate multifilament yarn is difficult to be entangled because of its low Young's modulus, and that the drawback is also noticeable. Therefore, the speed of the weaving process can be increased by gluing in the range of the number of entanglements in the range of 5 to 20 / m, and a high-quality woven fabric free from cracking and irritating defects of the woven fabric can be obtained.

In the present invention, the number of confounds is determined by US Pat.
It is a value obtained based on the measurement method described in the specification of No. 95, and a sample is suspended by suspending a load of total denier × 0.2 g at the lower end of the confounding point having a sample length of about 1 m. Insert a hook with a chrome plating of about 0.7mm in diameter at the center of the thread bundle, gently lift it up until it is stopped at the confounding part above the insertion position while supporting it with insect pins, and then entangle it from that position below. Lower it gently until it is stopped at the part, and measure its descending length Lcm. Repeat this,
Measured 50 times, average L (bar) to 100 / L (bar)
Is the value obtained by The lowering speed of the hook is 1 cm / sec.

Further, the size of the warp used in the present invention is not less than 1% by weight and not more than 3% by weight, and if the amount of the glue exceeds 3% by weight, the warp generated in the sizing process is particularly distorted. However, even if the number of entanglements is small, the crack defect is conspicuous, and the decrease in the number of entanglements during weaving is extremely inhibited, so that the entanglement remains in the woven fabric and the irritated defect appears on the woven fabric. On the other hand, if the adhesive amount exceeds 3% by weight, warp yarns become too hard, resulting in delicate defects and ground cracking defects in the woven fabric. Furthermore, since the entangled portion of the yarn is excessively fixed by the glue, the decrease in the number of entanglements is impeded even in the dyeing process after weaving, and an irritating defect caused by leaving entangled points in the woven fabric is exhibited. Significantly lowering the fabric quality.

On the other hand, when the amount of the glue adhering is less than 1% by weight, fluffs and loops are generated due to filament breakage during weaving, or weaving cuts resulting therefrom significantly lowers weaving efficiency. In order to prevent this, it is necessary to provide a considerable number of confounds. However, as described above, an increase in the number of confounds is a drawback, and fluff is generated and increased by the fluid treatment pressure and tension at the time of confounding. And other problems.

In the present invention, the defect of the fabric is a defect of the fabric which looks like a flicker at first glance due to the difference in the light ray reflection due to the unevenness of the thread in the fabric when there is a glue spot on the thread. The term "defect" refers to a defect in a woven fabric in which a warp in a woven fabric is wavy-curved when a glue adherence amount to a warp is too large, and a crack is formed on a cloth surface. The warp in the present invention is obtained by, for example, gluing by a touch roller method after imparting entanglement by fluid treatment. The touch roller method means that, first, one sizing roller whose lower end is immersed in the sizing solution is given a rotation in the same direction as the running direction of the thread to be sewn, so that the sizing roller not immersed in the sizing solution is applied. The upper end surface is also covered with the paste aqueous solution. On the other hand, this is a method in which a glue is applied to a warp yarn by being pressed downward by a gluing roller traveling in a direction perpendicular to the gluing roller and having a contact length of 5 mm to 70 mm with the gluing roller.

In the sizing of the warp used in the present invention, there is no need to particularly limit the sizing machine as long as the sizing can be performed by a touch roller system. It may be glued by a method or a dip squeeze method. As a sizing agent to be added to the warp,
An acrylic paste, a polyvinyl alcohol-based paste, or a mixed paste obtained by combining these may be used.

If necessary, an oil agent may be used in combination with the sizing agent. For example, there are commonly used oil agents containing a leveling agent, an emulsifier, an antistatic agent and the like. Examples of the leveling agent include mineral oil, sulfur-containing polyhydric alcohol esters, monobasic acid esters, and the like. Examples of the emulsifier include nonionic surfactants such as alkylphenol ethylene oxide adducts, higher alcohol ethylene oxide adducts, and fatty acid ethylene oxide adducts. Further, as the antistatic agent, quaternary ammonium salts represented by distearyl dimethyl ammonium chloride, divalmityl dimethyl ammonium chloride and the like, alkyl phosphate amine salts and the like are used.

Further, preferable conditions after the glue adhering step are as follows:
Chamber drying temperature is 80-150 degrees, hot cylinder drying temperature is 70-130 degrees, winding speed is 40-200
m / min. In the present invention,
As for the additional oil after aging, 0.3 wt% or more may be adhered in order to obtain good weaving efficiency.

In the present invention, the sizing adhesive amount refers to the adhesion ratio of the sizing agent to the net weight of the yarn, excluding the oil agent added to the aqueous sizing agent solution. In the present invention, the weaving loom,
It is not particularly limited, air jet loom,
It has excellent effects on water jet loom, rapier room, gripper room, and shuttle loom,
The effect is more remarkable for a high-speed loom operating at 400 rpm or more, particularly at 500 rpm to 800 rpm. Further, a loom of a single nozzle type or a loom having a plurality of nozzles may be used.

The weft of the woven fabric woven according to the present invention is:
It is not particularly limited, and polytrimethylene terephthalate multifilament yarns and spun yarns, as well as multifilament yarns and spun yarns such as synthetic fibers represented by polyethylene terephthalate, regenerated cellulose-based fibers,
Natural fibers and the like may be used, and further, these composite yarns and processed yarns may be used. Also, the warp may be used in combination with another yarn on a loom. Further, the fabric structure is not particularly limited, and a flat structure, a twill structure, a satin structure, and the like can be formed.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to embodiments. The evaluation method and the production conditions of the used polytrimethylene terephthalate multifilament yarn in the examples are as follows. (1) Woven Grade The warp defect, irritability defect, and ground cracking defect of the warp were evaluated by visual judgment both in a stationary state and when the fabric was run on an inspection machine. The degree of occurrence of defects was ranked by five persons based on the following five-point evaluation criteria, and represented by an average value. When the quality of the fabric is in the range of W0 to W1, the quality of the fabric is good.

W0: good with no cracking defects, irritating defects, and ground cracking defects W1: good in quality, with some cracking defects, irritating defects and ground cracking defects W2: good with cracking defects, irritating defects, W3: The occurrence of crack defects, irritation defects, and the occurrence of ground crack defects are inconspicuous. W4: The occurrence of crack defects, irritation defects, and the occurrence of ground crack defects are extremely inconspicuous. (2) Weaving efficiency 2 The loom was operated for 20 days, and the number of times the loom was stopped due to the warp (the number of times the warp was stopped) was evaluated by converting the number per machine per day. The number of warp factor stops (times / day / unit) should be within 1 (3) The elastic recovery rate at 10% elongation is 0.01 g for the sample.
An initial load of / d is applied, and the film is stretched at a constant rate of elongation of 20% per minute, and when the elongation reaches 10%, the material is contracted at the same speed in reverse to draw a stress-strain curve. When the residual elongation at the time when the stress is reduced to 0.01 g / d, which is equal to the initial load, during the shrinkage is defined as L, it is calculated by the following equation.

Elastic recovery at 10% elongation = (10-L)
/ 10 × 100 (%) (4) Production Example of Polytrimethylene Terephthalate Multifilament Yarn An undrawn yarn was obtained from polytrimethylene terephthalate having ηsp / c = 0.8 at a spinning temperature of 265 ° C. and a spinning speed of 1200 m / min. Next, a hot roll temperature of 60 ° C., a hot plate temperature of 140 ° C., a draw ratio of 3 ×, and a draw speed of 800 m /
And a 50d / 36f drawn yarn was obtained. The strength and elongation of the drawn yarn, elastic modulus and elastic recovery at 10% elongation are as follows:
They were 3.2 g / d, 46%, 30 g / d and 98%, respectively.

[0027]

Examples 1-4, Comparative Examples 1-10 50 denier / 36
Before winding the polytrimethylene terephthalate multifilament yarn of the filament into a warp supply, an entanglement treatment is performed using an air entanglement nozzle, and the pressure condition of the compressed air is changed to substantially eliminate the entanglement having various numbers of entanglements. A twisted thread was obtained. The obtained yarn was wound using a Kawamoto Machine G-3 type sizer at a winding speed of 70 m / min, a size liquid temperature of 37 degrees, a chamber temperature of 110 degrees, a heat cylinder temperature of 95 degrees,
Under the condition of a draft rate of 0.3%, a 12.0% pure content aqueous solution of Plus Size J-96 of Compatible Chemicals as a sizing agent and Cytex K-350 of Compatible Chemicals as a combined oil agent at a pure content of 1.5%. % And Fukule 214 of Matsumoto Yushi 0.1
% Was used as a sizing agent, and sizing was performed by a touch roller method at a sizing solution temperature of 38 ° C. and a contact length of 30 mm. In addition, weaving warp yarns having various sizing agent adhesion amounts were obtained by changing the number of rotations of the sizing roller.

Each of the weaving warps is manufactured by Tsuda Koma Kogyo ZW.
Use a 303 water jet loom, 75 for the weft
Using a denier / 36 filament polyethylene terephthalate multifilament yarn, weaving a flat fabric at 800 rpm, and dyeing the obtained greige fabric by a conventional method, the results of the fabric quality and weaving efficiency are shown in Table 1.

In Examples 1 to 4 of the present invention, there were no cracking defects, irritating defects, and ground cracking defects, the warp quality was good, and the weaving efficiency was good.

[0030]

[Table 1]

[0031]

Industrial Applicability The method for producing a woven fabric of the present invention can provide a woven fabric of good woven quality and high woven efficiency in high-speed weaving, and has an excellent effect of greatly reducing the total cost of woven fabric production.

Claims (1)

[Claims] 1. A woven fabric, wherein the warp is a substantially non-twisted polytrimethylene terephthalate multifilament yarn and woven using a warp satisfying the following conditions (A) and (B). Manufacturing method. (A) Number of confounds: 5 to 20 pieces / m (B) Glue adhesion amount: 1 to 3% by weight