JP2000045145A - Polyester-based filament yarn for weaving by water-jet loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject filament yarn capable of preventing clogging of reeds and abrasion of the reeds, caused by a sizing agent dropped when weaving the yarn, and providing a woven fabric having good appearance quality by regulating the viscosity of an oiling agent added with water, attached to a polyester-base filament yarn so as to be lower than a prescribed value, and further regulating the amount of the oiling agent attached thereto so as to be lower than a prescribed value. SOLUTION: This polyester-based filament yarn used as a warp in weaving by a water-jet loom has <=0.5 Pa.s maximum value of viscosities of an oiling agent added with water, attached to a polyester-based filament yarn, and further <=1.3/D1/2 wt.% amount of the oiling agent attached thereto [D (dtex) is the size of single filament of the filament yarn].

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warp yarn woven in a water jet loom, and more particularly to a polyester long fiber yarn suitable for woven at a high speed of 12 rotations / second or more.

[0002]

2. Description of the Related Art Conventionally, in the production of woven fabrics using synthetic long fiber yarns, weaving is performed by a water jet loom capable of high-speed operation. In recent years, non-adhesive weaving without warp gluing has also been carried out in order to streamline the process and reduce costs. However, polyester long fiber yarns are relatively stiff in nature, and are vulnerable to bending or bending. There are problems such as the occurrence of fluff due to yarn breakage, and the wear of parts of the loom, such as reeds and healds, which are in direct contact with warps. Therefore, in the high-speed weaving of polyester filament yarn by water jet loom, a water-resistant acrylic paste is applied to the warp in order to protect the surface of the warp and improve the bundling property. It is common to use the yarn as it is. However, since a large amount of water is jetted out of the water jet loom, the uncured glue falls off the yarn, clogging the reeds, and the warp does not move smoothly. Trouble occurs. Also, when the glue falls off, the yarn directly touches the reed, so that the single yarn is cut or
Problems such as reed wear may also occur.

A number of proposals have been made for improving the warp, for example, Japanese Patent Publication No. 49-20276 and Japanese Patent Application Laid-Open No. 62-2233.
In No. 72 gazette, an oil agent mainly composed of mineral oil is applied, and the yarn is glued into a warp yarn and woven in a water jet loom, thereby preventing the paste from falling off during weaving and preventing reed abrasion,
In addition, a method for improving the weaving efficiency and the quality of the woven fabric is disclosed. However, in the conventional method as described above,
Water jet loom can slightly reduce glue loss and reed abrasion during weaving, and can improve the quality of woven fabrics to some extent.However, it is not effective when weaving at high speed or using a warp with a small single-filament fineness. It was the actual situation.

[0004]

The object of the present invention is to improve the oil applied during spinning during weaving in a water jet loom so as to increase the film strength after the adhesive has been applied. An object of the present invention is to provide a warp yarn that prevents reed clogging and abrasion of a reed due to glue drop and obtains a high-quality woven fabric.

[0005]

The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that the mixture of the oil agent and the sizing agent adhering to the warp during weaving of the water jet loom has fallen off. In order to prevent this, it is necessary to increase the film strength of the sizing agent, and in order to satisfy this requirement, it has been found that there is a relationship between the compatibility of the oil agent adhering to the yarn and the sizing agent and reached the present invention It is. That is, the present invention
Polyester long fiber yarn used for warp by sizing in water jet loom weaving, wherein the maximum value of the hydrolytic viscosity of the oil agent attached to the long fiber yarn is 0.5 Pas or less, A polyester fiber filament for water jet loom weaving, characterized in that the amount of adhesion is 1.3 / D1 / ² % by weight or less when the single fiber fineness of the filament fiber is Ddtex. is there.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The polyester long fiber yarn used in the present invention is a polyester long fiber glued yarn composed of polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate, or the like, and other components are copolymerized to such an extent that their performance is not impaired. Fibers made of the polymer may be used. As a general warp production method in water jet loom weaving of polyester continuous fiber yarn, after warping a raw yarn to which an oil agent has adhered, a thread is passed through a sizing agent, a sizing agent is adhered, and dried. After the glue is cured, it is wound around a beam to form a warp. The warp yarn is set in a water jet loom and a weft is driven into a woven fabric.

The present inventors have paid attention to the gluing step and the weaving step, and have found means for reducing the size of the paste. First, in the gluing step, when a sizing agent is attached to the yarn to which the oil agent is attached, a mixture of the oil agent and the sizing agent is attached. After drying, weaving in a water jet loom, and when water adheres, the oil portion of the mixture adsorbs water, and swelling of the glue starts from this portion, which eventually falls off the yarn and causes clogging of the reed. Become. Further, since the oil agent and the glue drop off from the yarn, the bunching property is lost and the single yarn breaks, or the yarn comes into direct contact with the reed, resulting in severe reed wear. In order to eliminate this problem, it is necessary to increase the film strength of the sizing agent. However, the present inventors have found that the problem can be solved by improving the compatibility between the oil agent and the sizing agent. That is, when the sizing agent is attached to the warp yarn to which the oil agent is attached, if the compatibility between the oil agent and the sizing agent is excellent, the mixture is in a uniform state, and there is no place where only the oil agent is present. As a result, when weaving in a water jet loom, there is no place to partially absorb water, so that the mixture of the oil agent and the glue does not easily fall off the yarn.

[0008] This is a method for improving the compatibility between the oil agent and the sizing agent, which can be achieved by lowering the hydrolysis viscosity of the oil agent attached to the yarn. As is well known, an oil agent to be attached to fibers imparts smoothness, antistatic properties, bunching properties, and the like, such as a mineral oil, a smoothing agent such as a fatty acid ester, a metal salt of a sulfonate compound and a phosphate compound, and a metal salt of a fatty acid. It is made of a mixture to which a large number of nonionic surfactants are added in order to impart antistatic agents and other properties. When such an oil is dispersed in water, the viscosity sharply increases in a certain concentration region. This property is called hydroviscosity. If the viscosity is high, the oil is not easily mixed with water when the oil is dispersed in water and emulsified.

Next, regarding the commonly used sizing agent, usually, the sizing agent exists in a state of being dispersed in water. When the sizing agent is further attached to the yarn, the amount of the sizing agent is adjusted and the resistance to the yarn is adjusted. Dilute with water to reduce water consumption. At this time, the water content is approximately 80% by weight or more. Therefore, when attaching the sizing agent to the yarn to which the oil agent having a high viscosity is attached, since the sizing agent does not easily mix with the water contained in the sizing agent, the drying process starts in a state where the oil agent portion is present in a lump,
Then, it is woven in a water jet loom. When water adheres in the water jet loom, the oil agent portion solidifies and begins to absorb water from the existing portion, and the swelling of the adhesive starts from the portion of the adhesive in contact with the portion, resulting in oil agent and desizing.

[0010] On the other hand, when an oil agent having a low hydrolysis viscosity is used, the oil agent and water contained in the paste are easily mixed in the sizing step, so that the oil agent and the paste adhere to the entire yarn uniformly. Become. When entering the drying process in this state and weaving in a water jet loom, the mixture of glue and oil adhering to the yarn is uniformly hardened, and even if water adheres, swelling does not progress, And the falling off of the oil agent is reduced. There are two ways to reduce the viscosity of oils:
It is effective to add an alcohol component to the oil or to add an alkanolamide component of a fatty acid. As another method, there is a method of adding an alkyl ether of a relatively low molecular weight polyalkylene oxide. Also, the fatty acid ester as a leveling agent can be solved by using a relatively low molecular weight one.

The oil agent used in the water jet loom weaving warp of the present invention needs to have a maximum value of the hydrolysis viscosity of 0.5 Pa · s or less. If it exceeds 0.5 Pas, if the glue is applied in the subsequent process, mixing with the glue will not be sufficient, and the glue will fall off in the weaving process vigorously, causing reed stitches or increased reed wear. .

Next, the amount of the oil agent to be attached to the warp of the present invention is 1.3 / 1.3 when the single yarn fineness of the yarn is Ddtex.
D ^1/2 % by weight or less. For this reason,
The present inventors have obtained the following findings. In general, when sizing a raw yarn for warp, the yarn is passed through a water emulsion of a sizing agent having a net content of 10 to 20% by weight to allow the sizing agent to adhere, and then dried to harden the sizing agent and the warp yarn. I do. At this time, the amount of glue attached is about 3 to 5% by weight with respect to the yarn, and if the amount is larger than necessary, excess glue comes off during weaving,
Reed clogging may occur, which is disadvantageous in terms of cost. Conversely, if the amount of the glue is too small, the film will not be formed sufficiently, and the yarn will directly contact the reed, causing reed wear. In this situation, glue is applied to the warp yarn, but if a large amount of oil is attached to the warp yarn,
The ratio of the oil agent in the mixture of the oil agent and the sizing agent attached to the yarn after the sizing is increased. In this state, when water is woven in a water jet loom and adheres to the warp, the oil agent portion adsorbs water, so if the amount of oil agent is large, the oil agent tends to adsorb water, so that the swelling of the paste easily proceeds, It will result in glue loss.

From the above, the amount of the oil agent adhering to the warp yarn must be increased as the single yarn fineness is small. However, when the single yarn fineness is Ddtex, 1.3 /
If the content exceeds D ^1/2 % by weight, the amount of glue removed during weaving of a water jet loom becomes severe, and reed abrasion tends to progress. Although the lower limit of the amount of the oil agent is not particularly limited, the lower limit is generally 0.6 / D ¹ / ² % by weight for the warping step before the sizing step, the process passability in the yarn production step and the prevention of trouble. .

[0014]

According to the present invention, the proportion of the sizing agent after the sizing agent is adhered is increased by reducing the amount of the oil agent attached to the warp yarn used for water jet loom weaving and reducing the hydrolysis viscosity of the oil agent. The purpose is to improve the compatibility between the oil agent and the sizing agent, increase the film strength of the sizing agent in the drying process, and reduce the size of the slime and reed abrasion when weaving in a water jet loom to obtain an excellent quality fabric. .

[0015]

Next, the present invention will be described specifically with reference to examples. The various characteristic values of the present invention were measured by the following methods. (1) Maximum value of hydroviscosity Oil solution and water are mixed, and an emulsion solution is prepared at an oil solution concentration of 10 to 90% by weight every 10% by weight. It was measured at 30 ° C. using Model -01 or VT-02. The maximum value among these values was defined as the maximum value of the hydroviscosity. (2) Amount of oil applied After the yarn was dried at 100 ° C. for 30 minutes, it was precisely weighed (W ₁ ), the oil was extracted with a Soxhlet extractor using n-hexane as a solvent, and evaporated at 90 ° C. to dryness. After solidification, the amount of oil (W ₂ ) was calculated, and the amount of oil applied (W) was calculated by the following equation. W (% by weight) = (W ₂ / W ₁ ) × 100 (3) Amount of adhesive agent The yarn to which the oil agent and the adhesive agent are attached is dried at 100 ° C. for 30 minutes, and the weight (V ₁ ) is measured. It is immersed in a 5% by weight aqueous solution of NaOH at 30 ° C., shaken for 60 minutes, and then washed with water. Again 100
Dry at 60 ° C. for 60 minutes and measure the weight (V ₂ ).
The adhesion amount (V) of the mixture of the oil agent and the paste was calculated. V (% by weight) = ((V ₁ −V ₂ ) / V ₁ ) × 100 Next, the oil agent adhesion rate obtained above was subtracted to calculate the adhesive agent adhesion amount (U). U (% by weight) = V-W 4) Glue-removing property Reed cleaning is performed every 10 days during a weaving period of about 40 days on a polyester taffeta 300 at a water jet loom at a loom rotation speed of 14 rpm. The degree of clogging during cleaning was visually observed, and the result was determined after weaving for 300 trees. ◎: No clogging clogging ○: Some clogging of reed clogging △: Many clogging of reed clogging ×: Many clogging, weaving not possible within 10 days 5) Abrasion reed A 300-polyester taffeta in a water jet loom rotates 14 times on a loom on a loom. After weaving at about 40 days per second for about 40 days, the reed was removed from the loom, and the occurrence of scratches was examined under a microscope, and judged based on the following criteria. ◎: No scratches ○: Shallow scratches are observed △: Deep scratches are found ×: Deep scratches are not possible before weaving for 40 days 6) Fabric quality Polyester taffeta in a water jet loom 300 looms on a loom at 14 rotations / Weaving in seconds, the greige machine at the 300th bridge was inspected, visually observed, and judged based on the following criteria. ：: No defect △: Some streaks ×: Many streaks

Example 1 After drying a polyethylene terephthalate chip having an [η] of 0.69 and containing 0.45% by weight of titanium oxide, using a conventional melt spinning machine, a spinning temperature of 295 ° C., a discharge rate of 0.46 g / s and a pore diameter of 0 were used. .
After spinning using a die having a diameter of 25 mm and a number of holes of 18 and cooling with an air stream, a 20% emulsion of an oil agent of the composition A shown in Table 1 was adhered by a slit oiling device, and was heated for 57 m by a roller heated to 95 ° C. / S. Then, continuously 136
The yarn for warp yarn of the present invention having 55 dtex / 18 filaments having 1.55 times the elongation between a roller heated to 0 ° C and an oil application amount W of 0.65% by weight was obtained. On the other hand, the discharge rate was 0.75 g / s,
Using the oil agent F in Table 1 instead of the base of 36,
An 83 dtex / 36 filament weft base yarn was obtained in the same manner as described above except that the amount was 0.6% by weight. Acrylic sizing agent (Jo-98 manufactured by Yoyo Kagaku Co., Ltd.) using 1330 warp yarns, processing speed 3.5m /
s, a squeeze pressure was adjusted at a paste concentration of 12.5% by weight and a paste temperature of 30 ° C. to adhere 4.0% by weight of the paste, dried continuously at 135 ° C., and wound up into a beam. This glue thread beam is
The total number of warps is 5320, and after passing through the heald, the reed density
A woven beam was obtained by passing two birds through a water jet room reed of 50 birds / 25 mm. Next, using the woven beam and the raw weft yarn, weaving 300 polyester taffeta by Tsuda Koma Co., Ltd. ZW type water jet room at a weft driving density of 75 yarns / 25 mm and a loom rotation speed of 14 rotations / s, Weaving and woven fabric quality were evaluated.

[0017]

[Table 1]

Examples 2 to 6 and Comparative Examples 1 to 8 The oils having the compositions (A to F) shown in Table 1 were used, and the amount of the oil applied (W) was changed by changing the flow rate of the emulsion with a slit oiling device. Examples 2 to 2 shown in Table 2 were obtained by changing the number of holes and using a die having 24 holes.
6 and Comparative Examples 1 to 8 were obtained, and the weaving and woven fabric quality were evaluated in the same manner as in Example 1. Table 2 also shows the evaluation results of Examples 1 to 6 and Comparative Examples 1 to 8.

[0019]

[Table 2]

As is evident from Table 2, the yarns using the warp yarns of the present invention have excellent adhesive removal properties and reed abrasion resistance, and also have excellent fabric quality. On the other hand, Comparative Examples 1, 2, and 5 using the oil agent having a high maximum value of the hydroviscosity,
It was inferior in any aspect of reed abrasion, and inferior in woven fabric quality. In addition, Comparative Examples 3 and 6, which had a large amount of oil applied even when an oil having a low maximum value of the water viscosity was used, were inferior in adhesive removal properties, reed abrasion, and fabric quality.

[0021]

According to the present invention, weaving at high speed rotation in a water jet loom can be performed without trouble by optimizing the amount of the oil agent adhering to the yarn used as the warp and the maximum value of the hydrolysis viscosity. A good quality woven fabric can be obtained.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D06M 13/02 D06M 13/02 4L052 13/44 13/44 F-term (Reference) 4L033 AA07 AB01 AC08 BA01 BA21 4L036 MA05 PA26 UA21 4L043 AA06 BB01 4L045 AA05 BA03 CA25 CA29 CB09 CB13 DA42 DA49 DA52 DA53 4L048 AA20 AB07 BA02 EA01 4L052 MA01 PA04

Claims (1)

[Claims] 1. A polyester long fiber yarn used for warp in water jet loom weaving, wherein the maximum value of the hydrolytic viscosity of an oil agent adhering to the long fiber yarn is 0.5.
Water-jet loom weaving polyester, wherein the amount of the oil agent is 1.3 / D1 / ² % by weight or less when the single fiber fineness of the long fiber yarn is Ddtex. Long fiber yarn.