WO2019239597A1 - Polyester synthetic fiber treatment agent and polyester synthetic fibers - Google Patents

Abstract

Provided are a polyester synthetic fiber treatment agent that is capable of improving the bundling properties of tow in a fiber spinning process, improving drawing properties in a drawing process, and furthermore sufficiently suppressing generated electricity in a yarn spinning process, and polyester synthetic fibers having such a polyester synthetic fiber treatment agent adhered thereto.　The polyester synthetic fiber treatment agent comprises 20 to 88.99 mass% of a specific long-chain alkyl phosphoric acid ester salt, 1 to 10 mass% of a specific short-chain alkyl phosphoric acid ester salt, 0.01 to 10 mass% of a specific inorganic phosphate, and 10 to 65 mass% of a non-ionic surfactant (for a total of 100 mass%).

Description

Treatment agent for polyester synthetic fiber and polyester synthetic fiber

The present invention relates to a polyester synthetic fiber treatment agent and a polyester synthetic fiber to which such a polyester synthetic fiber treatment agent is attached.

Conventionally, as a polyester-based synthetic fiber treatment agent, an organophosphate alkali metal salt, a specific wax or linear polyorganosiloxane, a treatment agent containing a specific nonionic surfactant (Patent Document 1), an organic phosphate ester Alkali metal salt, specific wax, specific linear polyorganosiloxane, treatment agent containing specific nonionic surfactant (Patent Document 2), alkali metal salt of alkyl phosphate ester, specific nonionic surfactant A treatment agent containing a metal phosphate (Patent Document 3) has been proposed.

Further, a specific alkyl phosphate potassium salt, a specific alkyl phosphate potassium salt, and at least one selected from polyoxyalkylene alkyl ether, polyoxyalkylene alkenyl ether and polyoxyalkylene (alkylphenyl) ether A fiber treatment agent (Patent Document 4) containing, a fiber treatment agent (Patent Document 5) containing a specific alkyl phosphate potassium salt and an acrylic resin in a specific ratio is disclosed. Furthermore, a synthetic fiber processing oil agent (Patent Document 6) containing an alkali metal salt of phosphoric acid as an important component is disclosed.

JP 2002-020971 A JP 2002-030571 A Japanese Patent No. 579922 JP 2008-063713 A International Publication No. 2009/098845 Japanese Patent Laid-Open No. 53-103099

Various fiber treatment agents have been proposed as exemplified in the above-mentioned patent documents. However, as a high-performance treatment agent, in the market, it has excellent tow convergence in the spinning process and excellent stretchability in the stretching process, and furthermore, it is possible to suppress the generation of electricity in the spinning process. Fibers, as well as their treatment agents, are eagerly desired.

The present invention has been made in view of the above-mentioned background, and has a polyester system that has excellent convergence of tow in the spinning process and excellent stretchability in the stretching process, and can suppress the generated electricity in the spinning process. It is an object of the present invention to provide a synthetic fiber treatment agent and a polyester synthetic fiber to which the polyester synthetic fiber treatment agent is attached.

As a result of intensive studies by the present inventors, it is possible to solve the problems of the present invention by using a polyester synthetic fiber treatment agent containing a specific three component and a nonionic surfactant in a specific ratio. The headline and the present invention were completed.

That is, the present invention comprises 20 to 88.9% by mass of the following long-chain alkyl phosphate ester salt, 1 to 10% by mass of the following short-chain alkyl phosphate ester salt, and 0.01 to 10% of the following inorganic phosphate salt. A polyester synthetic fiber treatment agent characterized by containing 10% by mass and a nonionic surfactant in a proportion of 10 to 65% by mass (total of 100% by mass), and a polyester synthetic fiber treatment agent, It relates to the polyester-based synthetic fibers attached.

Long chain alkyl phosphate ester salt: Alkali metal salt of alkyl phosphate ester having 16 to 18 carbon atoms in the alkyl group.

Short chain alkyl phosphate ester salt: Alkali metal salt of alkyl phosphate ester having 4 to 8 carbon atoms in the alkyl group.

Inorganic phosphate: at least one selected from a bimetallic hydrogen phosphate and a trimetallic phosphate.

First, the polyester synthetic fiber treating agent according to the present invention (hereinafter also referred to as the treating agent of the present invention) will be described. The treatment agent of the present invention is a treatment agent for polyester-based synthetic fibers comprising a specific three component and a nonionic surfactant in a specific ratio.

Examples of the long chain alkyl phosphate ester salt used in the treatment agent of the present invention include hexadecyl phosphate alkali metal salt, octadecyl phosphate alkali metal salt, isostearyl phosphate alkali metal salt, and the like. Are alkali metal salts of alkyl phosphate esters having a molecular weight of 16-18.

Examples of the short-chain alkyl phosphate ester salt used in the treatment agent of the present invention include an alkyl group such as a normal butyl phosphate alkali metal salt, a hexyl phosphate alkali metal salt, an octyl phosphate alkali metal salt having 4 to 4 carbon atoms. 8 Alkyl phosphate ester alkali metal salts. Among these, short-chain alkyl phosphate salts having 4 to 6 carbon atoms in the alkyl group, such as normal butyl phosphate alkali metal salts and hexyl phosphate alkali metal salts, are preferred.

The inorganic phosphate to be used in the treatment agent of the present invention is at least one selected from a bimetallic hydrogen phosphate and a trimetallic hydrogen phosphate, and among them, a bimetallic hydrogen phosphate is preferable. Specifically, dipotassium hydrogen phosphate includes dipotassium hydrogen phosphate, disodium hydrogen phosphate, and the like, and triphosphates of phosphoric acid include tripotassium phosphate, trisodium phosphate, and the like. It is done.

Nonionic surfactants used in the treatment agent of the present invention include α-dodecyl-ω-hydroxypolyoxyethylene (n = 10), α-dodecyl-ω-hydroxypolyoxyethylene polyoxypropylene (n + m = 10), α-dodecylamino-ω-hydroxypolyoxyethylene (n = 10), α-nonylphenyl-ω-hydroxypolyoxyethylene (n = 10), α-dodecylamino-ω-hydroxypolyoxyethylene (n = 10) Etc. Here, n means the number of oxyethylene units, n + m means the total number of oxyethylene units and oxypropylene units, and so on.

The treating agent of the present invention comprises 20 to 89.99% by mass of the above long-chain alkyl phosphate ester salt, 1 to 10% by mass of short-chain alkyl phosphate ester salt, and 0.01 to 10% by mass of inorganic phosphate. % And a nonionic surfactant in a proportion of 10 to 65% by mass (total of 100% by mass). The content of the inorganic phosphate is more preferably 0.1 to 5.0% by mass, still more preferably 0.3 to 3.0% by mass.

The treatment agent of the present invention may further contain a material selected from the following wax and the following linear polyorganosiloxane in a proportion of less than 12% by mass of the total treatment agent of the present invention.

Wax: At least one selected from an ester compound obtained from an aliphatic monohydric alcohol having 16 to 22 carbon atoms and an aliphatic monocarboxylic acid having 6 to 22 carbon atoms and paraffin wax, and having a melting point of 50 to 120 ° C. Things.

Linear polyorganosiloxane: kinematic viscosity at 30 ° C. of 1 × 10 ⁻³ to 100 × 10 ⁻³ m ² / s.

Specifically, examples of the wax include aliphatic monohydric alcohols having 16 to 22 carbon atoms such as cetyl alcohol, stearyl alcohol, arachidyl alcohol, and behenyl alcohol, caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, and palmitic acid. And ester compounds obtained from aliphatic monocarboxylic acids having 6 to 22 carbon atoms such as stearic acid, arachidic acid and behenic acid, and paraffin wax having a melting point of 65 ° C. Examples of the linear polyorganosiloxane include polydimethylsiloxane having a kinematic viscosity at 30 ° C. of 10 × 10 ⁻³ m ² / s, polydimethylsiloxane having a kinematic viscosity at 30 ° C. of 50 × 10 ⁻³ m ² / s, and the like. Can be mentioned.

The treatment agent of the present invention preferably has a surface tension of a 1% by mass aqueous solution of less than 45 mN / m. The surface tension can be determined by subjecting a 1% by weight aqueous solution of the treatment agent of the present invention prepared using ion exchange water to a vertical plate method surface tension measuring device.

Finally, the polyester synthetic fiber according to the present invention (hereinafter also referred to as the synthetic fiber of the present invention) will be described. The synthetic fiber of the present invention is a polyester-based synthetic fiber to which the treatment agent of the present invention is attached.

Examples of the polyester-based synthetic fibers include polyethylene terephthalate fibers and polytrimethylene terephthalate fibers. Among them, polyethylene terephthalate fibers are preferable. The proportion of the treatment agent of the present invention attached to the fiber is not particularly limited, but the treatment agent of the present invention is preferably adhered to the fiber in a proportion of 0.01 to 0.5% by mass. Further, the step of attaching the treatment agent of the present invention may be any of a spinning step, a drawing step, a crimping step, etc., but it is preferably attached before or after the spinning step or the crimping step. The adhering method may be any of an immersion oiling method, a spray oiling method, a roller oiling method, a guide oiling method using a metering pump, etc., but an immersion oiling method, a spray oiling method or a roller oiling method is preferred.

According to the present invention, a polyester synthetic fiber treating agent and polyester that have excellent tow convergence in the spinning process and excellent stretchability in the stretching process, and can suppress the generated electricity in the spinning process. An excellent effect of providing a synthetic fiber can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

Hereinafter, examples and the like will be described in order to make the configuration and effects of the present invention more specific, but the present invention is not limited to these examples. In the following Examples and Comparative Examples, “part” means “part by mass” and “%” means “% by mass”.

Test category 1 (Preparation of polyester synthetic fiber treatment agent and measurement of surface tension)
Example 1
Octadecyl phosphate potassium salt (A-1) 69.0 parts, Butyl phosphate ester potassium salt (A-4) 5.0 parts, Dipotassium hydrogen phosphate (B-1) 1.0 part, and α-dodecyl -Ω-hydroxypolyoxyethylene (n = 10) / α-dodecyl-ω-hydroxypolyoxyethylene polyoxypropylene (n + m = 10) / α-dodecylamino-ω-hydroxypolyoxyethylene (n = 10) = 25 25.0 parts of a / 25/50 (mass ratio) mixture (C-1) was added to a predetermined amount of half amount of ion-exchanged water heated to 80 ° C. with stirring to completely dissolve the mixture. After dissolution, the remaining half of the ion exchange water was added all at once and stirred until uniform to prepare 200 g of a 1% aqueous solution of a synthetic fiber treating agent. The pH of this aqueous solution was measured and found to be 9.0. An operation of measuring the surface tension at 20 ° C. by subjecting the prepared 1% aqueous liquid of the treating agent for synthetic fiber to a vertical plate method surface tension measuring device (trade name KYOWA CBVP SURFACE TENSIONMETER manufactured by Kyowa Interface Science Co., Ltd.) The average value (mN / m) of the five measurements thus obtained was calculated to be 39.7 mN / m.

Examples 2 to 15, Reference Example 1 and Comparative Examples 1 to 13
In the same manner as in Example 1, 200 g each of 1% aqueous solutions of the treating agents for synthetic fibers of Examples 2 to 15, Reference Example 1 and Comparative Examples 1 to 13 were prepared according to the contents shown in Table 1, and the surface tension was adjusted. The average value was calculated by measurement. The contents of each example including Example 1 and the average value of the surface tension are summarized in Table 1. The pH of the aqueous solution of Example 2 was 8.4, and the pH of the aqueous solution of Comparative Example 9 was 10.5.

In Table 1,
A-1: Octadecyl phosphate potassium salt A-2: Cetyl phosphate potassium salt A-3: Lauryl phosphate potassium salt A-4: Butyl phosphate potassium salt A-5: Hexyl phosphate potassium salt A-6 : Polyoxyethylene (n = 7) cetyl phosphate potassium salt B-1: Dipotassium hydrogen phosphate B-2: Tripotassium phosphate B-3: Disodium hydrogen phosphate C-1: α-dodecyl -Ω-hydroxypolyoxyethylene (n = 10) / α-dodecyl-ω-hydroxypolyoxyethylene polyoxypropylene (n + m = 10) / α-dodecylamino-ω-hydroxypolyoxyethylene (n = 10) = 25 / 25/50 (mass ratio) mixture C-2: α-nonylphenyl-ω-hydroxypolyoxyethylene (N = 10) / α-dodecylamino-ω-hydroxypolyoxyethylene (n = 10) = 70/30 (mass ratio) mixture C-3: polyoxyethylene (n = 7) lauryl ether C-4: Polyoxyethylene (n = 10) lauryl ether / polyoxyethylene (n = 25) lauryl ether / polyoxyethylene (n = 5) oleyl ether / polyethylene glycol (molecular weight 1100) monolaurate = 55/10/20/15
C-5: Polyethylene glycol (average molecular weight 400) monolaurate D-1: Paraffin wax having a melting point of 60 ° C. D-2: Stearyl stearate having a melting point of 61 ° C. E-1: Viscosity at 30 ° C. of 10 × 10 ^{− 3} m ² / s linear polydimethylsiloxane

Test category 2 (Evaluation of polyester synthetic fiber treatment agent)
With respect to the polyester synthetic fiber treating agents of each example prepared in Test Category 1, the tow sizing property, stretchability and generated electricity were evaluated as follows, and the results are summarized in Table 2.

・ Evaluation of Tow Convergence The tow sizing ability was evaluated as follows by substituting the dynamic surface tension of the polyester synthetic fiber treatment agent. A 1% aqueous solution of the polyester synthetic fiber treating agent of each example prepared in Test Category 1 was allowed to stand at 20 ° C. overnight, and then a dynamic surface tension measuring apparatus (trade name QC6000 manufactured by Chem-Dyne Research Corporation). Was used, and the dynamic surface tension was measured under the condition of 5 Bubbles / second in an atmosphere of 65% RH at 25 ° C., and the tow convergence was evaluated according to the following criteria.

Evaluation criteria for tow convergence ◎: Dynamic surface tension is less than 40 mN / m ○: Dynamic surface tension is 40 mN / m or more and less than 45 mN / m ×: Dynamic surface tension is 45 mN / m or more

-Evaluation of stretchability The stretchability was evaluated as follows using the test apparatus schematically shown in Fig. 1. In FIG. 1, 1 is a container, 2 is a 1% aqueous solution of a polyester synthetic fiber treatment agent, 3 is a cylindrical metal friction body, 3 and 5 are free rollers, and 6 is a polyester filament. With respect to the 1% aqueous solution of the processing agent for synthetic fibers, the polyester filament 6 is pulled in the direction of the arrow in FIG. 1 at a speed of 50 m / min in the state of FIG. 1, and the upstream portion of the free roller 4 and the free roller 5 at this time Tensile strength T1 and T2 in the downstream portion were measured under an atmosphere of 20 ° C., and the stretchability was evaluated from the ratio of T2 / T1 according to the following criteria.

Evaluation criteria for stretchability ◎: T2 / T1 = less than 6.00 ○: T2 / T1 = 6.00 or more and less than 6.30 ×: T2 / T1 = 6.30 or more

・ Evaluation of generated electricity 1% aqueous liquid of polyester synthetic fiber treatment agent of each example prepared in Test Category 1 was further diluted with ion-exchanged water, and 0.5% aqueous liquid of polyester synthetic fiber treatment agent was diluted. Prepared. A semi-dal polyester staple having a fineness of 1.3 × 10 ⁻⁴ g / m (1.2 denier) and a fiber length of 38 mm obtained from the cotton-making process using a 0.5% aqueous solution of the prepared polyester synthetic fiber treatment agent The fiber is attached to the fiber by a spray lubrication method so that the amount of the polyester-based synthetic fiber treatment agent is 0.15%, dried in a hot air dryer at 80 ° C. for 2 hours, and then 25 ° C. × 40% RH. Humidity was adjusted overnight under an atmosphere to obtain a treated polyester staple fiber having a polyester synthetic fiber treating agent attached thereto. Using 10 kg of the treated polyester staple fiber thus obtained, it was subjected to a flat card (manufactured by Toyoka Industries Co., Ltd.) under an atmosphere of 25 ° C. × 40% RH and allowed to pass under conditions of spinning speed = 140 m / min. . The generated electricity of the spun card web was measured, and the antistatic property was evaluated according to the following criteria.

Evaluation criteria for generated electricity ◎: Generated electricity is less than 0.1 kV ○: Generated electricity is 0.1 kV or more and less than 0.3 kV ×: Generated electricity is 0.3 kV or more and less than 0.6 kV XX: Generated electricity is 0.6kV or more

As is clear from the results of Table 2 corresponding to Table 1, according to the present invention, the present invention has excellent tow convergence in the spinning process and excellent stretchability in the stretching process, and further in the spinning process. There is an excellent effect that the generated electricity can be sufficiently suppressed.

The polyester synthetic fiber treating agent of the present invention is useful as a polyester synthetic fiber treating agent. The polyester synthetic fiber of the present invention can be used as a polyester synthetic fiber to which the polyester synthetic fiber treating agent is attached.

DESCRIPTION OF SYMBOLS 1 Container 2 1% aqueous solution of the processing agent for polyester synthetic fibers 3 Cylindrical metal friction body 4,5 Free roller 6 Polyester filament

Claims (6)

1. 20 to 88.9% by mass of the following long-chain alkyl phosphate ester salt, 1 to 10% by mass of the following short-chain alkyl phosphate ester salt, 0.01 to 10% by mass of the following inorganic phosphate and non- A polyester synthetic fiber treating agent comprising an ionic surfactant in a proportion of 10 to 65% by mass (total of 100% by mass).
   Long-chain alkyl phosphate ester salt: An alkali metal salt of an alkyl phosphate ester having an alkyl group with 16 to 18 carbon atoms.
   Short chain alkyl phosphate ester salt: Alkali metal salt of alkyl phosphate ester having 4 to 8 carbon atoms in the alkyl group.
   Inorganic phosphate: At least one selected from a bimetallic hydrogen phosphate and a trimetallic phosphate.
2. The polyester synthetic fiber treating agent according to claim 1, further comprising a wax selected from the following wax and the following linear polyorganosiloxane in a proportion of less than 12% by mass.
   Wax: At least one selected from an ester compound obtained from an aliphatic monohydric alcohol having 16 to 22 carbon atoms and an aliphatic monocarboxylic acid having 6 to 22 carbon atoms and paraffin wax, and having a melting point of 50 to 120 ° C. Things.
   Linear polyorganosiloxane: kinematic viscosity at 30 ° C. of 1 × 10 ⁻³ to 100 × 10 ⁻³ m ² / s.
3. The polyester synthetic fiber treating agent according to claim 1 or 2, wherein the content of the inorganic phosphate is 0.1 to 5.0 mass%.
4. The polyester synthetic fiber treating agent according to any one of claims 1 to 3, wherein a content ratio of the inorganic phosphate is 0.3 to 3.0 mass%.
5. The polyester synthetic fiber treating agent according to any one of claims 1 to 4, wherein the surface tension of a 1 mass% aqueous solution at 20 ° C is less than 45 mN / m.
6. A polyester-based synthetic fiber, wherein the polyester-based synthetic fiber treating agent according to any one of claims 1 to 5 is adhered thereto.

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