JPH0913275A - Paste for fiber - Google Patents

Abstract

(57) [Summary] [Structure] A vinyl ester polymer having a hydroxyalkyl group having 2 to 20 carbon atoms in the side chain or having 2 to 2 carbon atoms.
A sizing agent for fibers, which comprises a vinyl alcohol polymer having 20 hydroxyalkyl groups in its side chain as an essential component. [Effect] The sizing agent for fibers of the present invention is excellent in adhesiveness to a hydrophobic fiber, abrasion strength, cohesive force, and abrasion resistance as described above, greatly improves weaving property, and has low hygroscopicity and high temperature and high humidity. Even if the glued yarn beam is stored underneath, it is excellent in unwinding and opening properties of the glued yarn, can greatly improve weaving efficiency, and has an extremely high industrial value. It is useful not only as a sizing agent for warp sizing, but also as a resin processing of textiles, a sizing agent for laundry, a sizing agent for printing, or a binder for non-woven fabrics.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sizing agent for fibers which has excellent weaving performance when weaving various fibers using a loom. More specifically, prior to weaving by shuttle loom and shuttleless loom, gluing is applied to fiber yarns such as filament yarn, processed yarn, twisted yarn and spun yarn to provide conjugation and wear resistance, and high temperature The present invention relates to an industrially useful sizing agent for fibers, which does not cause tackiness even when wet and does not lose its conjugation property even at low temperature and low humidity.

[0002]

2. Description of the Related Art Conventionally, starch, polyvinyl alcohol (hereinafter abbreviated as PVA), acrylic sizing agent and the like have been used as a sizing agent applied to a warp of a woven fabric for the purpose of reinforcement. Since each of these sizing agents has advantages and disadvantages, it is difficult to use them alone for various fibers.
The current situation is to use more than one kind of sizing agent together. The characteristics of typical sizing agents currently used are as shown in Table 1 below. PVAs have a tougher film than starches and have an excellent fiber-bundle-protecting action, and are also resistant to decay and long-term. It is widely used as a sizing agent for fibers because it can be stored.

[0003]

[Table 1]

[0004]

SUMMARY OF THE INVENTION However, PVA
Has insufficient adhesiveness to hydrophobic fibers such as polyester, nylon, polypropylene, and acrylic, and when the glued yarn beam is stored under high temperature and high humidity, the glued yarn becomes sticky due to moisture absorption There are drawbacks that unwinding becomes difficult and the coefficient of friction of the sizing yarn becomes large, which causes poor shedding during weaving. Also, for natural fibers such as cotton, when the glued yarn beam is stored in the summer, the glued yarn absorbs moisture under high temperature and high humidity, and its friction coefficient increases,
There is a problem in that weaving efficiency is reduced due to poor shedding and fluff during weaving.

[0005]

However, the inventors of the present invention have diligently studied to solve the above problems, and as a result, have 2 carbon atoms.
A sizing agent for fibers containing a vinyl ester polymer having a hydroxyalkyl group of 20 to 20 in the side chain as an essential component; and a vinyl alcohol polymer having a hydroxyalkyl group of 2 to 20 carbon atoms in the side chain as an essential component The present invention has been completed by finding a sizing agent for fibers to be used.

The side chain of the vinyl ester-based polymer and the vinyl alcohol-based polymer (saponified product of the vinyl ester-based polymer) used in the sizing agent for fibers of the present invention is a hydroxyalkyl group having 2 to 20 carbon atoms, The side chain must be directly bonded to the main chain of the vinyl ester polymer or its saponified product. The vinyl ester polymer and vinyl alcohol polymer used in the sizing agent for fibers of the present invention have 2 to 20 carbon atoms, preferably 2 to 15 carbon atoms, and 3 to 10 carbon atoms.
Is more preferred. The hydroxyalkyl group is an alkyl group having at least one hydroxyl group (hydroxyl group), and a ω-hydroxyalkyl group is more preferable in view of non-foaming property, water solubility and water dispersibility. As the alkyl group of the hydroxyalkyl group, the hydrogen atom has 1 to 9 carbon atoms.
It may be substituted with a linear or branched alkyl group. Examples of the monomer unit having a hydroxyalkyl group having 2 to 20 carbon atoms in the side chain include a hexyl group-containing olefin unit. Among the olefin units containing a hiddlexyl group, from the viewpoint of easiness of controlling the degree of polymerization of vinyl ester-based polymers and vinyl alcohol-based polymers and easiness of controlling the content of monomer units having a bidoxyalkyl group. , 3-butene-1-ol, 4-pentene-1-
All, 5-hexen-1-ol, 7-octene-1
-Ol, 9-decene-1-ol, 11-dodecene-
A monomer unit derived from 1-ol or the like is preferable. In addition to these monomer units, a monomer unit containing an ester group capable of purifying a hudoxyl group during a saponification reaction of a vinyl ester polymer may be used.

There is no particular limitation on the content of the hydroxyalkyl group having 2 to 20 carbon atoms in the vinyl ester polymer and the vinyl alcohol polymer used in the sizing agent for fibers of the present invention, but the preferred content is 0.1-30
Mol% is preferable, and 0.5 to 20 mol% is more preferable. When the content of the hydroxyalkyl group is less than 0.1 mol%, effects such as low hygroscopicity, low foaming property and adhesiveness to polyester fiber are not observed. Further, when the content of the hydroxyalkyl group is more than 30 mol%, the water solubility / water dispersibility becomes poor. The viscosity average degree of polymerization (hereinafter abbreviated as degree of polymerization) of the vinyl ester-based polymer and the vinyl alcohol-based polymer used in the sizing agent for fibers of the present invention is 10
0-8000 are preferable and 300-5000 are more preferable. When the degree of polymerization is less than 100, the strength of the film is low, and the gluing yarn has poor binding strength, abrasion strength, and adhesiveness to fibers. When it is greater than 8000, the viscosity of the sizing liquid is too high and Work becomes difficult.

The vinyl ester polymer used in the sizing agent for fibers of the present invention can be obtained by copolymerizing a vinyl ester and a hydroxyalkyl group-containing olefin. The vinyl alcohol-based polymer used in the sizing agent for fibers of the present invention can be obtained by saponifying a copolymer of vinyl ester and a hydroxyalkyl group-containing olefin. Examples of the vinyl ester include known ones such as vinyl formate, vinyl acetate, vinyl propionate and vinyl pivalate, but vinyl acetate is economically desirable.

It is also possible to copolymerize a hydrophilic ethylenically unsaturated monomer for the purpose of improving the water solubility or water dispersibility of the sizing agent for fibers of the present invention. The monomer is an ethylenically unsaturated monomer copolymerizable with vinyl ester, and examples thereof include acrylic acid, methacrylic acid, fumaric acid (anhydrous), maleic acid (anhydrous), itaconic acid (anhydrous), and trimethyl. -(3-Acrylamido-3-dimethylpropyl) -ammonium chloride, acrylamido-2-methylpropanesulphonic acid and its sodium salt, acrylamide and its quaternary salt, methacrylamide and its quaternary salt, sodium vinyl sulphonate, allyl Examples thereof include sodium sulfonate. The content of the hydrophilic ethylenically unsaturated monomer is 20 mol% or less, preferably 10 mol%
It is desirable that: If it exceeds 20 mol%, it is economically disadvantageous.

Further, the vinyl ester-based polymer and vinyl alcohol-based polymer used in the sizing agent for fibers of the present invention are other copolymerizable ethylenically unsaturated monomers within a range not impairing the effects of the present invention. It may be a copolymer of the body. Examples of such ethylenically unsaturated monomer include acrylonitrile, methacrylonitrile, ethyl vinyl ether, butyl vinyl ether, N-vinylpyrrolidone, vinyl chloride, vinyl bromide, vinyl fluoride, vinylidene chloride, vinylidene fluoride, Examples include tetrafluoroethylene and the like. The vinyl ester polymer and vinyl alcohol polymer used in the sizing agent for fibers of the present invention are further modified with a hydroxyalkyl group-containing olefin having 2 to 20 carbon atoms and a comonomer other than the hydrophilic ethylenically unsaturated monomer. In this case, the content of the comonomer is preferably less than 2 mol%, more preferably less than 1.0 mol%, even more preferably less than 0.5 mol%.

Generally, the sizing liquid viscosity of the warp sizing agent is preferably as low as 4 to 30 cP at the sizing temperature (40 to 50 ° C.) in the case of filament yarn, and when used for spun yarn. Preferably has a relatively high viscosity in order to improve the fluff binding. Specifically, the gluing temperature (70
Viscosity at 50 to 200 ° C. The resin concentration of the paste solution is generally about 3 to 15% by weight.
As the number of combinations of synthetic fibers and natural fibers is extremely large as a type of spun yarn, when preparing the paste solution,
It is necessary to assemble the prescription suitable for the target warp.
In the case of filament yarn, the purpose of sizing is different from spun yarn, and the main purpose is to bundle by binding between single fibers, so fluffing is not required unlike spun yarn, and a low viscosity, high adhesive glue liquid Preparation is required. It is also adjusted depending on the humidity conditions during weaving due to seasonal changes.

The amount of the sizing agent attached to the fiber is determined by the standard of the woven fabric,
It can be arbitrarily selected depending on the loom, sizing machine, and other equipment used. Generally, in the case of spun yarn, the main purpose is to fluff the surface of the sizing yarn and to reinforce it by internal permeation. Therefore, the sizing agent adhesion amount is determined in consideration of the required sizing yarn performance.
Generally, the larger the amount of the sizing agent attached, the more improved the abrasion resistance and fluff binding effect of the sizing yarn, and the less the warp breakage during weaving. In the case of filament yarn, fluff binding is not necessary, and therefore the amount of sizing agent attached is not required as much as spun yarn.

As described above, the fiber sizing agent of the present invention contains a vinyl ester polymer having a hydroxyalkyl group having 2 to 20 carbon atoms in its side chain and a vinyl alcohol polymer as essential components. To the extent that the effects of the invention are not impaired, general PVA, starch, modified starch, acrylic paste,
Cellulose glue, oil and other auxiliaries (defoamer,
Antifungal agents, antistatic agents, other anionic, nonionic or cationic surfactants, etc.) may be used in combination. The above has been described using the warp sizing agent as an example,
The fiber sizing agent of the present invention is also useful as a resin for fabrics, a sizing agent for laundry, a sizing agent for printing, and a binder for a non-woven fabric.

[0014]

By using a sizing agent for fibers containing a vinyl ester polymer having a hydroxyalkyl group having 2 to 20 carbon atoms in the side chain and / or a saponified product thereof as an essential component, the adhesiveness and conjugation to hydrophobic fibers can be improved. The weaving efficiency can be improved by improving the weaving efficiency and the abrasion resistance, greatly reducing defects such as openability and warp breakage during weaving. Further, it is possible to obtain better weavability than natural sizing agents for natural fibers such as cotton yarn. In particular, it has a low hygroscopicity under high temperature and high humidity, and excellent weavability can be obtained without causing troubles due to sticking of the sizing agent even during storage of the sized yarn beam in summer.

[0015]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. Unless otherwise specified, the terms "part" and "%" used below mean "part by weight" and "% by weight", respectively.

Synthesis Example 1 28.0 kg of vinyl acetate and 7-octene-1ol were added to a 50-liter polymerization tank equipped with a reflux condenser, a stirrer, a thermometer, a nitrogen introduction tube, a charging port for a post-added liquid and a pump. 2.5 kg of (hereinafter, abbreviated as 7-OEA) was charged. While stirring the polymerization solution, the system was replaced with nitrogen and heated, and when the temperature reached a constant temperature of 40 ° C., 2,2-azobisisobutyronitrile (hereinafter abbreviated as AIBN) was added to 33
Polymerization was initiated by adding 0 g. From the start of the polymerization, polymerization was carried out while analyzing the solid content concentration in the system, and after 5 hours, the polymerization tank was cooled to stop the polymerization. The polymerization rate before the termination of the polymerization was 32%. The obtained polymerized paste was dropped into n-hexane to precipitate a polymer. Next, the polymer is dissolved in acetone and reprecipitated by precipitating it in n-hexane.
After carrying out the purification operation three times, it was again dissolved in acetone, added dropwise to distilled water, purified by boiling, and dried at 60 ° C. to obtain purified polyvinyl acetate (hereinafter abbreviated as PVAc). Next, a methanol solution with a concentration of purified PVAc of 30% was prepared, and a methanol solution with a concentration of 10% of sodium hydroxide (molar ratio of 0.10 to PVAc) was added with stirring at 40 ° C. for 60 minutes. Was carried out.
The obtained gel-like material is crushed and then immersed in methanol to obtain a 10% sodium hydroxide methanol solution (PVAc
Was added, and the mixture was re-saponified for another 5 hours. The content of 7-OEA units in the obtained modified PVA was 7.1 mol%. Obtained modified PVA
Table 2 shows the basic structure (hereinafter abbreviated as PVA-1).

Synthesis Example 2 7-OEA and AIB were prepared using a 50 liter polymerization tank.
Polymerization, purification and saponification were conducted in the same manner as in Synthesis Example 1 except that the charged amounts of N were 1.2 kg and 116 g, respectively.
A modified PVA having an A unit content of 2.3 mol% was obtained. Table 2 shows the basic structure of the obtained modified PVA (hereinafter abbreviated as PVA-2).

Synthesis Example 3 The same procedure as in Synthesis Example 2 was carried out using a 50 liter polymerization tank.
The following polymerization was carried out. 1. 28 kg of vinyl acetate and 3-buten-1-ol (hereinafter abbreviated as 3-BEA)
9 kg, sodium allyl sulfonate (hereinafter referred to as SAS
300 g). While stirring the polymerization solution, the system was replaced with nitrogen and heated, and when the temperature reached a constant temperature of 40 ° C., 300 g of AIBN was added to start the polymerization,
After 5 hours, the polymerization was stopped when the polymerization rate reached 38%. Purified PVAc was obtained in the same manner as in Synthesis Example 2, and saponification and purification were performed to obtain purified PVA. The content of 3-BEA units in the obtained modified PVA was 7.1 mol%. Table 2 shows the basic structure of the obtained modified PVA (hereinafter abbreviated as PVA-3).

Synthesis Example 4 Polymerization, saponification and purification were carried out in the same manner as in Synthesis Example 3 except that 1.19 kg of 7-OEA was charged in place of 3-BEA used in Synthesis Example 3 to obtain a purified PVA. Table 2 shows the structure of the obtained modified PVA (hereinafter abbreviated as PVA-4).

Synthesis Example 5 Instead of 3-BEA used in Synthesis Example 3, 5-hexene-
1-ol (hereinafter abbreviated as 5-HEA) 2.85
Polymerization, saponification and purification were carried out in the same manner as in Synthesis Example 3 except that kg was charged and 130 g of SAS was charged, to obtain purified PVA. The structure of the obtained modified PVA (hereinafter abbreviated as PVA-5) is shown in Table 2.

Synthesis Example 6 Polymerization was performed in the same manner as in Synthesis Example 5 except that the amount of 5-HEA charged in Synthesis Example 5 was 3.7 kg, and PVAc containing 9.2 mol% of 5-HEA units was obtained. It was Obtained PVA
Table 2 shows the structure of c (hereinafter abbreviated as PVAc-6).

[0022]

[Table 2]

PVA-217: Kuraray's unmodified PVA saponification degree 88 mol%, polymerization degree 1700 PVA-205: Kuraray's unmodified PVA saponification degree 88 mol%, polymerization degree 500

Example 1 Using PVA-1 obtained in Synthesis Example 1, a paste solution having the following formulation was prepared. PVA-1 7.5% (solid content) Oil agent (warp set 100; manufactured by Takemoto Yushi Co., Ltd.) 1.0% (solid content) Total 8.5% (solid content)

This sizing solution was used for sizing under the following conditions and used for weaving. (1) Textile standards Warp: 40/1 cotton comb (manufactured by Toyobo Co., Ltd .; “Goldfish”) Weft: Same as above Warp density: 136 / inch Weft density: 72 / inch Weaving width: 47 inches Total number of warps: 6420 organization : Plain weaving loom: Tsudakoma Co., Ltd. air jet loom (AJL) ZA-203 type Rotation speed 530 rpm (2) Adhesive gluing machine; Model: Tsudakoma Co. 2 box 2 sheet type Paste liquid temperature: 92 ° C Squeeze roll width : 1800 mm Squeezing load: 800 kg / 1800 mm width Yarn speed: 65 yards / min Drying temperature: 100 to 130 ° C. Thread length with sizing: 5600 yards

As a result, when sizing, there was no foaming, the amount of sizing was 12.4%, the abrasion strength was 245 times, the number of fluffs of 1 mm or more was 61 pieces / m, and the weavability was also good.
The weaving efficiency was 96.1%, which was satisfactory. In addition, after the glued yarn beam glued at the same time is stored for 20 days in an environment assuming summer (30 ° C, 84% RH), it is set on a loom and used for weaving, and weavability for 2 days immediately after setting the beam is set. Observed, there were no troubles due to moisture absorption, and the weaving efficiency during that period was 94.8%, which was good.

Example 2 Example 1 was repeated except that the PVA-2 used (containing 2.3 mol% of 7-OEA units, saponification degree of vinyl acetate units of 88.0 mol% and polymerization degree of 1200) was used. In the same manner as above, sizing was applied and weaving was performed. As a result, the sizing amount was 11.7%, the abrasion strength was 237 times, the number of fluffs of 1 mm or more was 64 pieces / m, which was good, and the weaving efficiency was 9%.
It was 5.4%, which was satisfactory. In addition, the glued thread beam that was glued at the same time was used in an environment (30 ° C, 8
4% RH) for 20 days, then set on a loom and used for weaving, and the weavability was observed for 2 days immediately after the beam was set.
No troubles due to moisture absorption, and weaving efficiency during that period was 93.
It was as good as 7%.

Example 3 Instead of the cotton 40/1 comber used in Example 1, polyester / cotton blended yarn (hereinafter abbreviated as E / C) 45
/ 1 comber (manufactured by Kuraray; 1013C45 / 1C35) was used, and sizing was applied in the same manner as in Example 1 except that the formulation of the sizing liquid was as follows, and the woven liquid was used for weaving. PVA-2 5.0% (solid content) PVA-3 5.0% (solid content) Acrylic sizing agent 0.5% (solid content) (Plus size 663, manufactured by Kyodo Chemical Co., Ltd.) Oil agent (warp set 100; Takemoto Yushi Co., Ltd.) 0.7% (solid content) Total 11.2% (solid content)

As a result, the sizing amount was 13.2%, the abrasion strength was 232 times, the number of fluffs of 1 mm or more was 63 pieces / m, and the weaving efficiency was 95.0%.
I was satisfied. The glued yarn beam glued at the same time is used in an environment (30 ° C, 84% RH) that is supposed to be in summer.
After storing it for 0 days, it was installed on a loom and subjected to weaving, and the weaving property was observed for 2 days immediately after the beam was installed. No troubles due to moisture absorption were found, and the weaving efficiency during that period was 93.6%, which was good.

Example 4 Instead of the cotton 40/1 comber used in Example 1, polyester thread (hereinafter abbreviated as E) 40/1 (manufactured by Kuraray; 1013S40 / 1) was used to prepare a paste solution. Was sewed and woven in the same manner as in Example 1 except that the above was carried out. PVA-3 6.0% (solid content) PVA-4 5.0% (solid content) Acrylic sizing agent 0.5% (solid content) (Plus size 663 manufactured by Kyouka Chemical Industry Co., Ltd.) Oil agent (warp set 100; Takemoto Yushi Co., Ltd.) 0.7% (solid content) Total 12.2% (solid content)

As a result, the sizing amount was 12.8%, the abrasion strength was 565 times, the number of fluffs of 1 mm or more was 71 pieces / m, and the weaving efficiency was 92.2%.
I was satisfied. The glued yarn beam glued at the same time is used in an environment (30 ° C, 84% RH) that is supposed to be in summer.
After storing it for 0 days, it was installed on a loom and subjected to weaving, and the weaving property was observed for 2 days immediately after the beam was installed, but there was no trouble due to moisture absorption, and the weaving efficiency during that period was 91.2%, which was good.

Comparative Example 1 Instead of PVA-1 used in Example 1, PVA-217
In the same manner as in Example 1 except that the above was used, sizing was performed and the cloth was woven. As a result, the sizing amount was 12.9%, the abrasion strength was 219 times, the number of fluffs of 1 mm or more was 69 pieces / m, and the weaving efficiency was 93.2%, which was relatively good. However, the glued thread beam with glue is used under the environment (3
After 20 days of storage at 0 ° C. and 84% RH), it was installed in a loom, subjected to weaving, and the weavability was observed for 2 days immediately after the beam was installed. About 1 hour after the start of weaving, fluffing started to occur, warp breakage and weft stopping frequently occurred, and the average weaving efficiency for 2 days was 83.4%, which was poor. This trouble gradually improved after the third day.

Comparative Example 2 A paste was applied in the same manner as in Example 3 except that the following paste formulation was used.
Used for weaving. PVA-217 7.5% (solid content) PVA-205 2.5% (solid content) Acrylic sizing agent 0.5% (solid content) (Plus size 663 manufactured by Kyouka Chemical Industry Co., Ltd.) Oil agent (warp set 100; Takemoto Yushi Co., Ltd.) 0.7% (solid content) Total 11.2% (solid content)

As a result, the sizing amount was 13.4%, the abrasion strength was 212 times, the number of fluffs of 1 mm or more was 73 pieces / m, and the weaving efficiency was 90.1%. However, the glued thread beam with glue is used in an environment (30 ℃, 84
% RH) for 20 days, then set on a loom and subjected to weaving, and the weavability was observed for 2 days immediately after the beam was installed. The weaving property during weaving was significantly reduced due to moisture absorption, and about 40 minutes after the start of weaving. Occurrence of fluff, frequent occurrence of warp breakage and weft stoppage, and average weaving efficiency for 2 days is 79.4%.
And was bad. This trouble gradually improved after the third day.

Comparative Example 3 Adhesion was carried out in the same manner as in Example 4 except that the following paste formulation was used,
Used for weaving. PVA-217 6.0% (solid content) PVA-205 5.0% (solid content) Acrylic sizing agent 0.5% (solid content) (Plus size 663, manufactured by Kyodo Chemical Co., Ltd.) Oil agent (warp set 100; Takemoto Yushi Co., Ltd.) 0.7% (solid content) Total 12.2% (solid content)

As a result, the sizing amount was 12.8%, the abrasion strength was 423 times, the number of fluffs of 1 mm or more was 82 pieces / m, and the weaving efficiency was 88.9%, which was somewhat unsatisfactory. In addition, the glued beam that was glued at the same time was stored for 20 days in an environment (30 ° C., 84% RH) assuming a summer season, then placed on a loom and used for weaving. Observation revealed that the openability during weaving was significantly reduced due to moisture absorption, and fluff balls began to appear about 30 minutes after the start of weaving, and warp breakage and weft stopping frequently occurred, and the average weaving efficiency for 2 days was 73.1%. Was bad. This trouble gradually improved after the third day.

[0037]

[Table 3]

[0038]

[Table 4]

Example 5 A paste solution having the following formulation was prepared. PVA-5 5.0% (solid content) Acrylic sizing agent 5.0% (solid content) (Plus size T-823 manufactured by Kyodo Chemical Co., Ltd.) Oil agent (Cytex T-190 manufactured by Kyoku Chemical). 6% (solid content) Oil agent 0.2% (solid content) (Cytex Silicon 53, manufactured by Kyodo Chemical Co., Ltd.) 10.8% (solid content)

Using this sizing liquid, sizing and weaving were performed under the following conditions. (1) Textile standards Warp: Polyester filament SD75d / 36f (Kuraray) Untwisted weft: Same as above Organization: Plain weave (taffeta) Loom: AJL ZA-203 type Rotation speed 540 rpm (2) Glue pasting machine; Model: Tsuda Koma Warping sizer made by the company Temperature of sizing liquid: 45 ° C Squeezing roll width: 1800mm Squeezing load: 200kg / 1800mm width Yarn speed: 140 yards / min Drying temperature: 130 ° C Sizing yarn length: 5600 yards

As a result, the sizing amount was 9.2%, the binding strength was good at 34 times, and the weaving efficiency was good at 96.8%. In addition, the glued yarn beam glued at the same time is used in an environment assuming summer (30 ° C, 84%
After being stored in the RH for 20 days, it was placed in a loom and subjected to weaving. As a result, there was no adhesive trouble due to moisture absorption of the sized yarn, good weaving was possible, and the weaving efficiency was 94.8%.

Example 6 In the same manner as in Example 5 except that PVAc-6 was used in place of PVA-5 in Example 5, sizing was applied and used for weaving.
As a result, the sizing amount was 9.1%, the binding force was 43 times, which was very good, and the weaving efficiency was 9;
It was good at 7.6%. In addition, the glued yarn beam glued at the same time is used in an environment assuming summer (30 ° C, 84% RH).
After storing it for 20 days in a loom, it was installed in a loom and subjected to weaving. As a result, weaving could be satisfactorily performed without any adhesive trouble due to moisture absorption of the sized yarn, and the weaving efficiency was 95.7%.

Comparative Example 4 PVA-205 was used in place of PVA-5 in Example 5.
Was used in the same manner as in Example 5 except that the following paste formulation was used, and the cloth was used for weaving.

PVA-205 5.5% (solid content) Acrylic sizing agent 5.5% (solid content) (Plus size T-823, manufactured by Mutual Chemical Co., Ltd.) ) 0.6% (solid content) Oil agent 0.2% (solid content) (Cytex Silicon 53, manufactured by Goyo Chemical Industry Co., Ltd.) Total 10.8% (solid content)

As a result, the sizing amount was 9.4%, the binding force was 26 times, and the weaving efficiency was 91.9%. In addition, the glued yarn beam glued at the same time was stored for 20 days in an environment (30 ° C, 84% RH) assuming a summer season, then placed on a loom and used for weaving. Trouble occurred, fluff was generated at the time of unwinding from the beam, warp breakage occurred frequently during weaving, and openability was poor. The weaving efficiency at that time was 87.3%.

[0046]

[Table 5]

[0047]

EFFECT OF THE INVENTION The sizing agent for fibers of the present invention is excellent in adhesiveness to hydrophobic fibers, abrasion strength, cohesive force and abrasion resistance as described above, greatly improves weavability, and has low hygroscopicity and high temperature. Even when the glued yarn beam is stored under high humidity, the untwistedness and opening of the glued yarn are excellent, the weaving efficiency can be greatly improved, and the industrial value is extremely high. It is useful not only as a sizing agent for warp sizing, but also as a resin processing of textiles, a sizing agent for laundry, a sizing agent for printing, or a binder for non-woven fabrics.

Claims (4)

[Claims] 1. A sizing agent for fibers, which comprises a vinyl ester polymer having a hydroxyalkyl group having 2 to 20 carbon atoms in its side chain as an essential component. 2. A sizing agent for fibers, which comprises a vinyl alcohol polymer having a hydroxyalkyl group having 2 to 20 carbon atoms in its side chain as an essential component. 3. The sizing agent for fibers according to claim 1, wherein the vinyl ester polymer contains 0.1 to 20 mol% of hydrophilic groups. 4. The sizing agent for fibers according to claim 2, wherein the vinyl alcohol polymer contains 0.1 to 20 mol% of hydrophilic groups.