JPH108379A - Warp for woven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a warp having a specific combined fuzz length, having a stable weaving property and capable of being woven into a high quality woven fabric by sizing lyocell (R) multifilament yarn in a stuck sizing agent amount of a specific range. SOLUTION: This warp for woven fabric is produced by sticking a sizing liquid consisting mainly of polyvinyl alcohol having a degree of polymerization of 300-3000 and a degree of saponification of 75-90mol.% to the lyocell (R) multifilament yarn and subsequently drying the sized multifilament yarn at a drying chamber temperature of 100-150 deg.C at a heat cylinder temperature of 100-130 deg.C and in a stretch of -1.0% to +3.0% between a sizing part and the drying chamber. The obtained sized warp has a stuck size amount of 2-4wt.%, preferably 3-3.5wt.%, and a combined fuzz length of <=30mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warp yarn for woven fabric, which is a glued yarn composed of lyocell fiber multifilament yarn.

[0002]

2. Description of the Related Art Conventionally, copper ammonia-based rayon yarns and viscose-based rayon yarns, which are cellulosic multifilaments, have a faster penetration of size liquid in sizing than synthetic fiber yarns, and are mainly sized by a roller touch method. The amount of glue adhering to the warp is 2.5% by weight to 4%
It is carried out in the range of about% by weight, and although not necessarily sufficient, a considerably satisfactory weaving efficiency and fabric quality are realized.

On the other hand, when a lyocell fiber multifilament yarn is sized similarly to a copper ammonia method rayon yarn or a viscose method rayon yarn, the size liquid does not penetrate into the inside of the filament, but is glued in a so-called tempura form. As a result, glue drops and fluffing occur at the time of weaving, eventually causing warp breakage, lowering the weaving efficiency and adversely affecting the quality of the fabric.

[0004] In addition, 5
Even if a very large amount of sizing agent of from 6% by weight to 6% by weight is applied, not only is the weaving efficiency comparable to that of the conventional regenerated cellulose-based multifilament yarn obtained, but also the cost is disadvantageous. There is a problem that the warp becomes hard and the warp quality is significantly lowered due to the drawbacks of chika and ground cracks generated in the woven fabric.

[0005]

DISCLOSURE OF THE INVENTION The present invention is directed to a glued woven fabric of lyocell fiber multifilament, which is useful for high-quality woven fabrics having a good quality of warp, which prevents glue dropping and fuzzing in weaving. The purpose is to provide warp yarns

[0006]

Means for Solving the Problems The inventors of the present invention have thoroughly studied the relationship between the size reduction and the fluffing and the physical properties of the glued yarn in the process of gluing and weaving the lyocell fiber multifilament. As a result, it has been found that there is a close relationship between the tying fluff length of the sizing thread and the weaving property, and furthermore, the texture and the quality of the woven fabric, and that the lyocell fiber multifilament has a thickness of 200 t / m to 1000 t / m.
In the case where the twist is included, it has been found that it is more effective, and the present invention has been accomplished.

That is, the present invention relates to a warp for woven fabric composed of lyocell fiber multifilament yarn, wherein the warp has a conjugate fuzz length of 30 mm or less and a glue adhesion amount of 2 to 2.
The present invention relates to a warp yarn for woven fabric, which is a 4% by weight glued yarn. Hereinafter, the present invention will be described in detail. In the present invention, the lyocell fiber refers to a cellulose fiber obtained by dissolving cellulose in a mixed solvent of an organic solvent and water to form a cellulose solution, and wet-spinning or dry-spinning the solution as a spinning solution. That is, it is a cellulose fiber obtained by organic solvent spinning, and does not pass through the form of a cellulose derivative.

[0008] For example, as described in JP-B-60-28848, a solution containing a non-solvent such as cellulose and water dissolved in an organic solvent is spun into air or a non-precipitating medium. At this time, the fiber-forming solution obtained from the spinneret is pulled at a speed higher than the speed at which the fiber-forming solution is sent out, drawn at a draw ratio of 3 times or more, and then treated with a non-solution.

The organic solvent may be a known solvent, for example, the following amine oxides disclosed in Japanese Patent Publication No. 28848/1985, or another kind of solvent. Amine oxides used as organic solvents include, for example, tertiary amine-oxides, for example the oxides of trimethylamine, triethylamine, tripropylamine, monomethyldiethylamine, dimethylmonoethylamine, monomethyldiproamine; Oxides of dimethyl-, N-diethyl-, N-dipropylcyclohexylamine; oxides of pyridine; and cyclic mono (N-methylamine-N-oxide) such as N-methylmorpholine N-oxide. Among them, the use of N-methylmorpholine N-oxide is preferred.

[0010] The lyocell fiber multifilament yarn is
Usually, the dry strength is 3 g / d to 5 g / d, the dry elongation is 5% to 10%, preferably the dry strength is 3 g / d to 4 g / d.
Hereinafter, the dry elongation is 7% or more and 10% or less. In the present invention, the conjugate fuzz length must be 30 mm or less. If the thickness exceeds 30 mm, fluffing occurs during weaving, warp breakage occurs, the weaving efficiency is reduced, and the quality of the fabric is adversely affected. Conjugation fluff length is preferably 5 mm to 30 m
m.

The sizing machine used in the present invention is a squeeze roller type sizing machine, in which the yarn is nipped with the roller at two places at the sizing section. On the other hand, when a roller touch sizing machine, which is mainly used as a sizing machine for regenerated cellulose filaments, is used, the sizing liquid does not penetrate into the inside of the yarn, but is glued in a tempura form to obtain a warp yarn having a conjugate fuzz length of 30 mm or less. Can not.

The sizing agent used has a degree of polymerization of 300.
Polyvinyl alcohol-based sizing agents having a saponification degree of 75 to 90 mol% (hereinafter, referred to as PVA) can be suitably used alone or in combination, and the modified PVA having the above properties is also preferably used. Further, the acrylic acid ester copolymer partially hydrolyzed with NaOH and the P
A mixed paste such as a VA paste is also preferably used. Further, an oil agent equivalent to 5 to 20% of the net amount of the paste may be used in combination with the paste.

The components of the oil include mineral oil, animal and vegetable oil,
Alternatively, in a liquid oil mainly composed of a fatty acid ester derivative, paraffin wax, etc., as a wettability-improving component for preventing the adhesive film from being cut on the sizing roller surface, a silicon-based activator, a fluorine-based activator, alcohols, etc. Further, those containing an emulsifying and dispersing agent such as a nonionic activator and an anionic activator as necessary are preferably used.

[0014] There is also a close relationship between the amount of glue adhering to the warp, the length of the conjugated fluff and the quality of the fabric, and the amount of adhering is 2 to 4% by weight.
Preferably, it is 3% by weight to 3.5% by weight. Adhesion amount is 2
If the amount is less than 30% by weight, it is difficult to maintain the conjugate fluff length of 30 mm or less, and if the amount exceeds 4% by weight, the texture of the finished fabric becomes hard. As sizing conditions, usually
When the drying temperature of the drying chamber is 100 ° C to 150 ° C, the drying temperature of the heating cylinder is 100 ° C to 130 ° C, and the stretch from the gluing section to the drying chamber is -1.0% to 3.0%. Perform drying at a speed that allows for sufficient drying and stable winding.

In the present invention, the sizing adhesive amount does not include the oil agent added to the sizing aqueous solution, that is, PVA.
Is the adhesion rate to the net weight of the yarn. The conjugated fluff length (L) in the present invention refers to the length of the fluff shown in FIG. 1 when the glued yarn is broken using a constant-speed extension type tensile tester according to JIS-L-1030. As will be described in detail later, in the present invention, this measurement was repeated 20 times, and the average value was used.

In the present invention, the loom for weaving is not particularly limited, and excellent effects can be obtained for any of a contradictory loom, a rapier loom, a gripper loom, and a jet loom. The weft of the woven fabric using the warp in the present invention is not particularly limited, and is a multifilament yarn of a cellulose fiber spun with an organic solvent or a synthetic fiber yarn represented by a conventional regenerated cellulose fiber yarn or polyester. A yarn, a spun yarn, or a natural fiber yarn may be used, and further, a composite yarn thereof may be used. There is no particular limitation on the fabric structure, and the fabric can be woven with a taffeta, twill, satin structure, or the like.

In fabricating the fabric, it may be blended with a natural cellulose fiber such as cotton, a regenerated cellulose fiber, or a synthetic fiber typified by polyester, as long as the object of the present invention is not impaired.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described specifically with reference to examples. Using a multifilament of lyocell fiber obtained in the following production example, a 75 denier / 50 filament yarn was used, and a comparative test was performed by a squeeze roller method and a roller touch method. The conditions other than the gluing method were the same. The evaluation method used in this example is as follows. (Conjugating fluff length) The length of the fluff shown in FIG. 1 when the glued yarn is broken using a constant-speed extension type tensile tester according to JIS-L-1030. More specifically, when the glued yarn is broken, the single yarn is separated so as to branch off from the converging portion of the filament. If the lengths of the separated single yarns are not the same, the length from the branching start point of the longest branched single yarn to the broken end portion is measured.

The conjugated fluff length is the average value obtained by performing this measurement 20 times. (Warp stop) Weaving was performed for 24 hours x 10 days using three looms, and at this time the glue drop was visually observed, and the warp stop (fluff, breakage of warp) was converted per machine / day. .

* 1 time / day or less is considered good. (Woven fabric quality) After the refining and finishing of the woven fabric, the sensory evaluation is performed by touch, and in consideration of the occurrence of chika defects, ground cracking defects, and warp defects, the first class is very good, and the second class is slightly good. Based on the five-grade evaluation criteria of grade 3 = normal, grade 4 = slightly bad, grade 5 = poor, the results were ranked by five people and represented by the average value.

[0021]

[Production example] (Production of lyocell fiber) According to the production method described in Japanese Patent Publication No. 28848/1985, pulp and an aqueous solution of N-methylmorpholine N-oxide were put into a mixing tank and mixed under reduced pressure to obtain a cellulose concentration of 10%. A 0.0% cellulose solution was prepared. The cellulose solution is subjected to air gap spinning at a discharge temperature of 124 ° C.
The spun yarn is scoured by washing with water, dried, and then oiled to the original yarn, and wound into a cheese without twisting.

[0022]

EXAMPLE The lyocell fiber multifilament obtained in the production example was used. (Sizing conditions) Sizer: Kawamoto Seisakusho, KFW type (squeeze roller method) Number of creel yarns: 800 sizing agent: PVA Drying temperature: drying room; 120 ° C / 120 ° C cylinder; 110 ° C / 110 ° C Winding speed: 100 m / min (Weaving conditions) Warp density: 102 yarns / inch Weft yarn density: 70 yarns / inch Weaving standard: 130 cm width Loom: Tsudakoma Seisakusho AJL, ZA-100 type 600 rpm, and the results of operation evaluation are shown in Table 1.

[0023]

Comparative Example 1 The procedure was the same as in the Example, except that the amount of glue was changed. Table 2 shows the results of the evaluation. As can be seen from Table 2, even with the squeeze roller method, the adhesive
If it is less than 10% by weight, the conjugated fluff length becomes long, the warp stop during weaving is high, and the defect of warp breakage in the woven fabric is also noticeable. When the glue adhesion amount exceeded 4.0% by weight, even when the tying fluff length was 30 mm or less, the ground cracking defect became noticeable in the woven fabric, and the woven fabric quality deteriorated.

[0024]

Comparative Example 2 Using the same lyocell fiber multifilament as in the example, the paste formulation, drying conditions and the like were the same, and a roller touch sizing machine was used. (Sizing conditions) Sizer: Tsudakoma Seisakusho, G-3 type (roller touch method) Number of creel yarns: 800 Glue: PVA, P-AB Drying temperature: Drying room; 120 ° C / 120 ° C Cylinder; 110 ° C / 110 ° C Winding speed: 100 m / min (weaving conditions) Warp density: 102 yarns / inch Weft yarn density: 70 yarns / inch Textile standard: 130 cm Width loom: Tsudakoma Seisakusho AJL, ZA-100 type 600 rpm Operating evaluation results are shown in the table. 3 is shown.

As can be seen from Table 3, even if the glue concentration is increased,
If the conjugated fluff length was not shortened and the glue adhesion amount was higher than 4.0%, a ground cracking defect occurred and the quality of the woven fabric decreased.

[0026]

[Table 1]

[0027]

[Table 2]

[0028]

[Table 3]

[0029]

According to the warp for woven fabric of the present invention, a stable woven fabric and a good quality woven fabric can be obtained.

[Brief description of the drawings]

FIG. 1 is a view showing a conjugated fluff length (L) when a yarn is broken using a constant-speed extension type tensile tester.

Claims (1)

[Claims] 1. A warp yarn for woven fabric composed of lyocell fiber multifilament yarn, wherein the warp yarn has a conjugated fluff length of 30 mm or less and has a glue adhesion amount of 2 to 4% by weight. A warp for textiles, characterized by the following.