JP2598193B2 - Polyester fiber for industrial use - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester fiber suitable for use in industrial materials. More specifically, the present invention relates to a polyester fiber for industrial use, which has no change in color tone with time and suppresses abnormal dyeing at the time of dyeing, and has good temporal stability.

[0002]

2. Description of the Related Art Polyester fibers are widely used not only for clothing but also for industrial applications utilizing high strength, excellent dimensional stability and the like. However, there is a problem with stability over time, such as coloring over time or abnormal dyeing at the time of dyeing, and the field of composites coated with a transparent or light-colored resin such as a urethane resin or a PVC resin, or a canvas, a tent, etc. Further improvement is desired for use in such devices.

Hitherto, as a method for improving the aging of polyester fibers, various methods have been proposed in which an oil agent composition containing a specific antioxidant or an ultraviolet absorber is adhered to the surface of polyester fibers (for example, Japanese Patent Application Laid-Open (JP-A) no. 53-139
897, JP-A-55-128074, JP-A-57-66183, and JP-A-2-175966. However, all of them are intended to suppress the deterioration with time of adhesion to rubber or to suppress strong light resistance deterioration, and do not suppress the change in color tone over time.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and provides a polyester fiber suitable for industrial material use, which suppresses the color change over time and does not cause abnormal dyeing at the time of dyeing. The purpose is to provide.

[0005]

Means for Solving the Problems The inventors of the present invention have made intensive studies to achieve the object, and as a result, surprisingly,
It has been found that an oil agent composition containing a specific ester compound as a smoothing component and a specific antioxidant in combination therewith can suppress color change over time without deteriorating other properties of the polyester fiber. The present invention has been reached.

That is, according to the present invention, as the smoothing component, a polyhydric ester compound of a polyhydric alcohol and a monohydric carboxylic acid or a polyhydric carboxylic acid and / or a polyhydric ester compound of a polyhydric carboxylic acid and a monohydric alcohol are used. An oil agent composition containing a polyester fiber is provided,
(A) Pentaerythritol tetrakis (lauryl thiopropionate) (b) 1 wherein the oil agent composition contains the following compounds (a) and (b): , 3,5-Tris (4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate is provided.

[0007] The oil agent composition provided to the polyester fiber of the present invention comprises a polyhydric alcohol and a monohydric carboxylic acid or a polyhydric carboxylic acid and / or a polyhydric carboxylic acid as a smoothing component. It is necessary to contain a polyhydric ester compound with a monohydric alcohol. When such an ester compound is not contained, heat treatment at a high temperature such as 200 ° C. or higher, which is usually employed in the production of polyester fibers for industrial use, cannot be continued, and not only causes smoke but also causes pollution of the working environment. It is not preferable because tar is formed on a heat roller, a yarn guide or the like, which may cause a single yarn breakage or the like.

[0008] The polyhydric alcohol component used in such a polyhydric ester compound includes glycerin, trimethylolpropane, trimethylolethane, sorbitol, pentaerythritol, 1,4-butadiol, 1,6-butadiol.
Examples are hexanediol, neopentyl glycol, di- or polyalkylene glycol, di- or polyglycerin.

The polyvalent carboxylic acid component includes divalent aliphatic carboxylic acids such as succinic acid, maleic acid, adipic acid, azelaic acid, sebacic acid and dimer acid, and polyvalent acids such as phthalic acid and tricarballylic acid. Aromatic carboxylic acids are exemplified.

Examples of the monohydric alcohol component include linear higher alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol and oleyl alcohol, and secondary alcohols such as isotridecyl alcohol and isohexadecyl alcohol.

Further, examples of the monovalent carboxylic acid component include various fatty acids, for example, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and aromatic carboxylic acids such as alkylbenzoic acid.

Specific examples of preferably used polyhydric ester compounds include trimethylolpropane trilaurate, trimethylolpropane trioleate, pentaerythritol tetralaurate and pentaerythritol as ester compounds of polyhydric alcohol and monohydric carboxylic acid. Examples thereof include tetraoleate, sorbitol tetralaurate, sorbitol tetraoleate, various natural fats and oils, and synthetic triglycerides.

Examples of esters of polyhydric alcohols and dibasic fatty acids include ethylene glycol, diethylene glycol, dipropylene glycol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, trimethylolpropane, diglycerin and the like. And polyester oils obtained by a dehydration condensation reaction of succinic acid, maleic acid, adipic acid, azelaic acid, sebacic acid, dimer acid and the like.

Further, as an ester of a monohydric alcohol and a polybasic fatty acid, dioleyl maleate, dilauryl adipate, diisotridecyl adipate, diisohexadecyl adipate, dioleyl adipate, dilauryl azelate, dioleyl azelate , Dilauryl sebacate, dioleyl sebacate, trilauryl trimellitate, triisohexadecyl trimellitate, trioleyl trimellitate and the like.

These polyhydric ester compounds may be used alone or in combination. However, the total amount of the effective solid content of the oil composition (if a nonionic surfactant is contained, it is 50 to 8).
It is preferable to use 0% by weight.

In the present invention, (a) pentaerythritol tetrakis (lauryl thiopropionate) and (b) 1,3,3
5-Tris (4-tert-butyl-3-hydroxy-2,6
It is important that (-dimethylbenzyl) isocyanurate is blended, and even if any of them is used alone, the object of the present invention cannot be achieved.

The mixing ratio of (a) and (b) is (a) /
(B) It is appropriate that (weight ratio) is 6/4 to 2/8, and 1 to 5% by weight, preferably 2 to 5% by weight of the active ingredient in the oil agent composition is blended. A remarkable coloring suppression effect is obtained.

The mixture of the above (a) and (b)
Even when used in combination with a leveling component different from the above-mentioned polyhydric ester compound, it is not possible to obtain a polyester fiber having satisfactory performance.

The oil composition described above may be used in combination with other components, if desired. For example, a nonionic surfactant such as polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene alkyl aryl ether may be used as an emulsifier. An oxyethylene-added alcohol fatty acid ester or the like may be compounded, or an anionic surfactant such as a higher alcohol or a higher alcohol to which ethylene oxide has been added, a phosphoric acid ester salt of an alkylphenol, or various sulfonate salts may be compounded. .

The oil composition described above can be applied to the polyester fiber at any time after the spun yarn is solidified, but usually it is applied to the yarn before the take-up roller. Give.

As a preferable means for applying, there can be mentioned a method in which the above-mentioned oil composition is converted into an aqueous emulsion and applied through a measuring oiling nozzle. 0.35-
It may be about 1.0% by weight. If the amount is too small, the yarn formability and weaving properties tend to decrease. On the other hand, if the amount is too large, the excess oil agent adheres to the rollers, yarn guides and the like, which is not preferable.

[0022]

The polyester fiber for industrial use according to the present invention is provided with an oil agent composition containing a specific antioxidant, so that it does not cause coloring even when stored for a long time, There is no staining abnormality.

Therefore, it is possible to stably provide a high-quality product even if stored for a long period of time, and its industrial value is great.

[0024]

The present invention will be further described with reference to the following examples. In the examples, the amounts of each component are expressed in parts by weight unless otherwise specified. In addition, each evaluation item in the examples was measured according to the following method.

1. Gelation rate A (g) of an oil agent composition (sample) was collected on a stainless steel dish having an inner diameter of 100 mm and a depth of 5 mm, and a thickness of 0.025 g / cm.
^{To be 2} . This was heat-treated in a hot-air circulating drier controlled at 230 ° C. for 20 hours. Then, 30 ml of carbon tetrachloride was added to the heat-treated sample, and the insoluble material was separated by filtration through a glass filter. g) is precisely weighed, and the gelation ratio is determined by the following equation. Gelation ratio (%) = B / A × 100 The gelation ratio of 10% or less is represented by ○, 10 to 30% is represented by Δ, and 30% or more is represented by ×.

2. The polyester fiber of 150 denier / 30 filaments to which 1% of the electrostatic oil composition is adhered is dried at 220 ° C. for 30 minutes and then conditioned at 20 ° C. and 65% RH for 24 hours. Then
This fiber is hard-finished chrome (roughness 5S) pin (diameter 30m)
m), and the charged voltage generated on the pin at a yarn running speed of 200 m / min was measured by a collecting potential meter.
A charge voltage of 1 KV or less is represented by 、, a voltage of 1 to 3 KV is represented by Δ, and a charge voltage of 3 KV or more is represented by ×.

3. Yellowing 1000 denier / 500 filaments of 350 filaments of 96-filament polyethylene terephthalate fiber per warp
A 2-inch wide seatbelt is woven using a 96-filament polyethylene terephthalate fiber as a weft.

The raw material was exposed to a petroleum stove combustion gas for 72 hours, the change in color was measured with a color difference meter, and the change in b value (Δb) was taken to evaluate yellowing. A value of Δb of 1 or less is represented by 、, 1 to 3 is represented by Δ, and 3 or more is represented by ×.

4. Dianix Navy Blue ER-P of Mitsubishi Kasei Co., Ltd.
liquid and DianixBlack ER-P liquid were adjusted to a concentration of 20% at a ratio of 1: 1. The raw material was immersed, dried at 130 ° C. for 10 minutes, and set at 200 ° C. for 1 minute. This was mixed with Bisnol P70 manufactured by the other company at a concentration of 2 g / liter and 8
After scouring at 0 ° C. for 15 minutes and drying at 105 ° C. for 15 minutes, the color change was measured with a color difference meter and evaluated by its ΔE value. ΔE value = ｛(ΔL) ² + (Δa) ² + (Δb) ² ｝ ^1/2 A value of ΔE of 1 or less is represented by ○, a value of 1 to 3 is represented by Δ, and a value of 3 or more is represented by ×.

[0030]

EXAMPLE 1 Polyethylene terephthalate having an intrinsic viscosity of 1.00 was melted and discharged to form a 30-filament yarn. The yarn was applied via an oiling roller so that the oil emulsion shown in Table 1 was made into a pure oil solution so as to be 1% by weight of the yarn weight. Then take 600m /
After preheating at 90 ° C. while taking up in minutes, heat-setting at 220 ° C. while stretching 5.0 times between the take-off roller and the stretching heat set roller, and then winding via an empty roller A 150 denier / 30 filament drawn yarn was obtained. In addition, 1000 denier / 96 filaments and 500 denier / 96 filament drawn yarns were obtained in the same manner except that the ejection amount and the number of filaments were changed and the amount of the oil agent applied was 0.5% by weight.

Table 1 summarizes the results of evaluation of the drawn yarns obtained at this time by the above-mentioned measuring method.

[0032]

[Table 1]

In the table, A is pentaerythritol tetrakis (lauryl thiopropionate), B is 1,3,5-
Tris (4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate, C is pentaerythritol tetrakis (β- (3,5-di-tert-butyl-
4-hydroxyphenyl) propionate). Table 1 shows that the polyester fiber of the present invention has little change in color tone such as yellowing and redness, and is excellent in stability over time.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-10709 (JP, A) JP-A-63-85172 (JP, A)

Claims (1)

(57) [Claims] An oil composition containing a polyhydric alcohol and a monohydric carboxylic acid or a polyhydric ester compound of a polyhydric carboxylic acid and / or a polyhydric ester compound of a polyhydric carboxylic acid and a monohydric alcohol as a smoothing component. Wherein the oil agent composition comprises the following compounds (a) and (b): (A) pentaerythritol tetrakis (lauryl thiopropionate) (b) 1,3,5-tris (4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate