JPH0524268B2 - - Google Patents

Description

[Detailed description of the invention]

<Industrial Application Field> The present invention relates to yarn for weaving, and more specifically to yarns containing synthetic fibers, particularly synthetic fibers such as polyester fibers and polyamide fibers, and chemical fibers such as cellulose acetate, using a specific polyester polyurethane resin. The present invention relates to a weaving yarn, particularly a warp yarn, which has excellent weaving properties and scouring properties, and is characterized by having a specific amount of . <Conventional technology> Generally, in the weaving process, the warp threads are reed,
It is subject to severe friction from the heddles, shuttles, and adjacent threads, making it prone to fuzzing, thread breakage, and even breakage. Therefore, in order to protect the warp threads from this phenomenon and obtain high-quality cloth, it is necessary to treat the warp threads with a sizing agent, coat the surface of the warp threads with a tough film, and bind the threads together to protect the warp threads from friction. There is. Conventionally, such sizing agents include starch, carboxymethyl cellulose, polyvinyl alcohol,
(Meth)acrylic acid ester/(meth)acrylic acid copolymer, vinyl acetate/crotonic acid copolymer, vinyl ether/maleic anhydride copolymer, etc. have been used. However, in recent years, high-speed weaving using innovative looms has become commonplace in order to increase production efficiency, and high-density fabrics that use a large number of fine threads have become commonplace, and damage to warp threads during weaving has become less There are things that are immeasurable. Under these circumstances, such glues have superior conjugation properties and
In other words, adhesion to synthetic fibers and synthetic fibers is required. However, with the conventional starch thread, polyvinyl alcohol-based, and vinyl-based sizing agents, the composition is essentially different from that of synthetic fibers, synthetic fibers, and especially polyester fibers, and it is difficult to dramatically improve adhesion and binding properties. . On the other hand, there are many examples in which water-based polyester resins or water-based polyurethane resins are used as a sizing agent because of their excellent compositional adhesion to synthetic fibers. For example, Japanese Patent Publication No. 47-40873 (aqueous polyester resin copolymerized with dicarboxylic acid having an ester-forming sulfonic acid group),
-34436 (water-based polyurethane resin obtained by urethanizing a polyester polyol containing a sulfonic acid group), and the like. <Problems to be Solved by the Present Invention> However, since both the water-based polyester resin and the water-based polyurethane resin contain sulfonic acid metal bases as hydrophilic groups, they remain as hydrophilic groups in the film even after drying. Warp threads glued with such glue do not have the water resistance required for waterjet loom weaving, and even in dry looms, warp threads tend to block due to moisture absorption over time, which is a fatal problem even in dry looms. There are some shortcomings, and in any case the warp threads are in storage.
Alternatively, it is necessary to control the temperature and humidity during the weaving process. In addition, in order to suppress hygroscopicity, lowering the concentration of the sulfonic acid metal base significantly reduces the scouring property after weaving. is almost impossible to obtain. <Means for Solving the Problems> From this point of view, the present inventors have arrived at the present invention as a result of intensive research into weaving yarns that are excellent in weaving properties and scouring properties. That is, the present invention provides ``aromatic dicarboxylic acid (a) and the general formula

[Reference example 1]

In a reactor equipped with a thermometer, nitrogen gas inlet tube, and stirrer, terephthalic acid is added while nitrogen gas is introduced.
830 parts, isophthalic acid 498 parts, ethylene glycol
341 parts of diethylene glycol, 424 parts of diethylene glycol, and 0.5 parts of dibutyltin oxide were charged and esterified at 180 to 230°C for 5 hours, followed by polycondensation reaction at 230°C for 6 hours until the acid value reached 0.9. Cool to 120℃,
Add 292 parts of adipic acid and 268 parts of 2,2-dimethylolpropionic acid, raise the temperature to 170°C again, and react at this temperature for 20 hours to obtain a pendant carboxyl group-containing polyester polyol with a hydroxyl value of 55.7 and an acid value of 56.0. Ta. 2000 parts of the above polyester polyol under reduced pressure
After dehydrating at 100℃ and then cooling to 70℃, add 1449 parts of methyl ethyl ketone and mix thoroughly.
Next, 174 parts of tolylene diisocyanate was added and reacted at 70°C for 8 hours. After the reaction was completed, it was cooled to 40°C. This polyester polyurethane resin had an acid value of 515 and a pendant carboxyl group content of 4.1% of the solid weight of the resin. Next, after neutralizing it by adding 338 parts of 10% ammonia water,
8,800 parts of water was added to make it water-soluble. After removing methyl ethyl ketone from the resulting transparent reaction product at 65° C. under reduced pressure, water was added to adjust the concentration to obtain a transparent colloidal dispersion with a non-volatile content of 20%. This is referred to as aqueous polyester polyurethane resin [A]. [Reference Example 2] A water-based polyester polyurethane resin [B] was obtained in the same manner as in Reference Example 1 except that a caustic soda aqueous solution was used instead of ammonia water. [Reference example 3] Terephthalic acid/ethylene glycol isophthalate/neopentyl glycol = 50/5050/50
(mole ratio) of copolymerized polyester polyol (acid value 0.2, hydroxyl value 93.0), 2,2-dimethylolpropionic acid, and hexamethylene diisocyanate were prepared in the same manner as in Reference Example 1 to 1/1/2.
(molar ratio). This polyester polyurethane resin had an acid value of 33.5 and a pendant carboxyl group content of 2.7% of the solid weight of the resin. This resin was then neutralized with aqueous ammonia,
A transparent colloidal dispersion with a non-volatile content of 20% was obtained. This is referred to as aqueous polyester polyurethane resin [C]. [Reference Example 4] A dispersion was obtained in the same manner as in Reference Example 3, except that a caustic soda aqueous solution was used instead of aqueous ammonia. This is referred to as water-based polyester polyurethane resin [D]. [Reference Example 5] Pendant carboxyl group-containing polyester polyol of Reference Example 1 (hydroxyl value 55.7, acid value 56.0)
500 parts of the copolymerized polyester polyol of Reference Example 3 (acid value: 0.2, hydroxyl value: 93.0), 20.1 parts of 2,2-dimethylolpropionic acid, and 109 parts of hexamethylene diisocyanate were reacted. This polyester polyurethane resin has an acid value of 39.2 and a content of pendant carboxyl groups based on the solid weight of the resin.
It was 3.1%. This resin was then neutralized with aqueous ammonia to obtain a transparent colloidal dispersion with a non-volatile content of 20%. This is referred to as aqueous polyester polyurethane resin [E]. Example 1 Polyester irregularly shaped bright untwisted yarn (50d/36F)
Add the following glue to Tsudakoma SK- at a glue mixture temperature of 35℃.
200 type warping slatshear (manufactured by Tsudakoma Kogyo Co., Ltd.)
Sizing thread speed 100 m/min, chamber 125
After-oiling was performed under dry conditions at 95°C and cylinder temperature. The various physical properties of this sized yarn were extremely excellent as shown in Table 1. [Sizing agent formulation] (solid content ratio) Water-based polyester polyurethane resin [B] 3 parts Gohsenol GL-05 6 parts (Nippon Gosei Kagaku Co., Ltd., Bobal) Assist LA-81 0.2 parts (Dainippon Ink Chemical Co., Ltd.) (smoothing agent manufactured by Kogyo Co., Ltd.) Finetex F-145 0.002 part (penetrating agent manufactured by Dainippon Ink & Chemicals Co., Ltd.) The above sizing yarn is used as the warp, and the weft is polyester irregularly shaped bright strong twisted yarn (50d/36F) using,
A pallet with 8,160 warp threads and a weaving width of 123 cm was woven using a Tsudakoma LK type loom at a weft insertion speed of 200 threads/min and 10 threads of 50 m each. The operating rate in this case was 99% or more, and the weaving properties were extremely excellent with no adhesive loss, and the scouring properties were also very good. Example 2, Comparative Example 1 The physical properties of the sized yarn, which was sized using the water-based polyester polyurethane resin [D] and a commercially available acrylic sizing agent for fly shuttle rooms, in the same manner as in Example 1, and the warp Table 1 shows the physical properties when woven as a material. As a result of the above, it was confirmed that all the warps of the present invention had excellent physical properties.

[Table] Example 3 The following sizing agent was added to a polyester irregular cross-section yarn (50d/36F) at a sizing agent mixture temperature of 30°C using a Tsudakoma KS-200 warping slushier at a sizing yarn speed of 130 m/s.
Gluing was carried out under dry conditions of 125°C inside the chamber and 95°C in the cylinder for 1 minute. The physical properties of this sizing thread are shown in Table-2.
As shown, it was extremely excellent. [Sizing agent formulation] (solid content ratio) Water-based polyester polyurethane resin [A] 6 parts Sizing wax V-2 0.2 parts (smoothing agent manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd.) The above sizing yarn is used as the warp and the weft is used as the weft. Using the same type of polyester filament yarn (50D/36F) as the warp, the super taffeta has 12,060 warps and a weaving width of 130cm.
150), weaving was carried out at a weft insertion speed of 520 revolutions/min, and 10 stitches were woven, with each stitch being 50 m long. The operating rate in this case is 99%
It showed extremely excellent weaving properties and good scouring properties. Example 4, Comparative Example 2 The various physical properties of the sized yarn, which was sized using a water-based polyester polyurethane resin [C] and a commercially available acrylic sizing agent for water jet rooms, in the same manner as in Example 3, and their properties were determined. Table 2 shows the physical properties when woven as a warp. As a result, it was confirmed that the warp of the present invention had excellent physical properties.

[Table] Example 5 Change the weft insertion speed of the loom from 520 rpm to 600 rpm
When weaving was carried out in the same manner as in Example 3 except that the weaving speed was increased to 100%, the operating rate was 98%, and it was confirmed that excellent weaving performance was achieved even when the speed of the loom was increased. Comparative Example 3 Comparative Example 2 is the same as in Example 5 except that the weft insertion speed of the loom is increased from 520 rpm to 600 rpm.
When weaving in the same way as above, the operating rate is 85%,
It has been found that increasing the speed of the loom causes severe damage to the warp threads, significantly reducing weaving performance, and posing a major impediment to practical use. Example 6 The following sizing agent was added to polyester/triacetate blended filament yarn (70d/44F) at a sizing solution temperature of 35
℃ using Tsudakoma KS-J type warping slusher, sizing yarn speed 120 m/min, 130℃ inside the champer,
The cylinder was glued under dry conditions at 98°C and after waxing was performed. The various physical properties of this sized yarn were extremely excellent as shown in Table 3. [Size formulation] (solid content ratio) Water-based polyester polyurethane resin of Example 5 (neutralized with caustic soda aqueous solution instead of ammonia) 2 parts Bobal 205 (manufactured by Kuraray Co., Ltd.) 5 parts Bobal 217 ( ) 1 Part Assist LA-81 Conc 0.2 parts (smoothing agent manufactured by Dainippon Ink & Chemicals Co., Ltd.) The above sizing yarn is used as the warp, and the weft is triacetate filament yarn (50d/12F), with 9600 warps, Tsudakoma ZA-200 made of taffeta with a weaving width of 123 cm
Weaving was carried out using a molded air jet loom at a weft insertion speed of 420 revolutions/min, and 80 stitches were woven, with each stitch being 55 meters long. The loom operating rate in this case was 97%, and the size agent did not easily fall off during weaving, showing extremely excellent weaving properties and producing a high-quality woven fabric.

[Table] Example 7 The following sizing agent was added to polyester irregular cross-section yarn (50d/36F) at a sizing agent mixture temperature of 30°C using a Tsudakoma KS-200 warping slushier at a sizing yarn speed of 130 m/
Gluing was carried out under dry conditions of 125°C inside the chamber and 95°C in the cylinder for 1 minute. Table 4 shows the physical properties of this glued yarn.
As shown, it was extremely excellent. [Size formulation] (solid content ratio) Water-based polyester polyurethane resin [E] 6 parts Sizing wax V-2 0.2 parts

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Claims (1)

[Claims] 1. Aromatic dicarboxylic acid (a) and dimethylol monocarboxylic acid (b) represented by the general formula [Formula] (wherein R is an alkyl group having 1 to 3 carbon atoms). A polyester polyol (A ₁ ) having an essential component and/or a mixture (A ₂ ) of a polyester polyol having an aromatic dicarboxylic acid (a) and the dimethylol monocarboxylic acid (b), and a polyisocyanate compound (B ), which has a pendant carboxyl group in its main chain, and the content of the pendant carboxyl group is 0.5 to 10% by weight based on the weight of the fiber.
Weaving yarn with 0.5 to 15% by weight attached. 2. The weaving yarn according to claim 1, wherein the pendant carboxyl groups of the polyester polyurethane resin are partially or completely neutralized with a base. 3. The weaving yarn according to claim 1 or 2, wherein at least 50% by weight of the acid component of the polyester polyol consists of aromatic dicarboxylic acid.