JP2018178352A - Treatment agent for polyester based synthetic fiber and polyester based synthetic fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treatment agent for polyester-based synthesized fiber capable of enhancing sizing property of toe in a spinning process, enhancing drawing property in a drawing process, and further sufficiently suppressing generation of electricity in a spinning process, and a polyester-based synthesized fiber to which the treatment agent for polyester-based synthesized fiber is adhered.SOLUTION: As a treatment agent for polyester-based synthesized fiber, used is one containing a specific long chain alkylphosphate ester of 20 to 88.99 mass%, a specific short chain alkylphosphate ester of 1 to 10 mass%, a specific inorganic phosphate of 0.01 to 10 mass% and a nonionic surfactant of 10 to 65 mass% (total 100 mass%).SELECTED DRAWING: None

Description

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

  Conventionally, an organic phosphate ester alkali metal salt, a specific wax or linear polyorganosiloxane, a specific non-ionic surfactant-containing treatment agent (Patent Document 1), an organic phosphate ester as a polyester-based synthetic fiber treatment agent Alkali metal salts, specific waxes, specific linear polyorganosiloxanes, treatment agents containing specific nonionic surfactants (Patent Document 2), alkali metal salts of alkyl phosphates, specific nonionic surfactants And treating agents containing a metal salt of phosphoric acid (Patent Document 3) and the like have been proposed.

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

Japanese Patent Application Laid-Open No. 2002-20971 JP 2002-030571 A Patent No. 579 6922 Japanese Patent Application Publication No. 2008-066373 International Publication 2009/098845 Japanese Patent Application 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 processing agent, in the market, polyester synthesis that combines excellent tow focusing in the spinning process and excellent stretchability in the drawing process, and can further suppress generated electricity in the spinning process Fibers, as well as their treatment, are desired.

  The present invention has been made in view of the above background, and it is a polyester system which has both excellent focusing property of tow in the spinning process and excellent stretchability in the drawing process, and can suppress generated electricity in the spinning process. An object of the present invention is to provide a synthetic fiber treating agent, and a polyester synthetic fiber to which such a polyester synthetic fiber treating 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-based synthetic fiber treatment agent comprising specific three components and a nonionic surfactant in a specific ratio. The present invention has been completed.

  That is, according to the present invention, 20 to 88.99% 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 50% by mass of the following inorganic phosphate A treating agent for a polyester based synthetic fiber characterized by comprising 10% by mass and 10 to 65% by mass (totally 100% by mass) of a nonionic surfactant and such a treating agent for a polyester based synthetic fiber Pertaining to attached polyester synthetic fiber.

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

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

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

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

  As long-chain alkyl phosphate ester salts to be used for the treatment agent of the present invention, carbon number of alkyl group such as hexadecyl phosphate alkali metal salt, octadecyl phosphate alkali metal salt, isostearyl phosphate alkali metal salt, etc. And an alkali metal salt of an alkyl phosphoric acid ester of 16-18.

  The short chain alkyl phosphoric acid ester salt to be used in the treatment agent of the present invention includes 4 to 25 carbon atoms of alkyl group such as normal butyl phosphoric acid ester alkali metal salt, hexyl phosphoric acid ester alkali metal salt, octyl phosphoric acid ester alkali metal salt and the like. Alkali metal salts of alkyl phosphates of 8 can be mentioned. Among these, short-chain alkyl phosphate ester salts having 4 to 6 carbon atoms in the alkyl group such as normal butyl phosphate ester alkali metal salts and hexyl phosphate ester alkali metal salts are preferable.

  The inorganic phosphate to be used for the treatment agent of the present invention is at least one selected from hydrogen phosphate bimetallic salts and phosphoric acid trimetallic salts, and among them, hydrogen phosphate bimetallic salts are preferable. Specifically, examples of the bimetallic hydrogen phosphate include dipotassium hydrogen phosphate and disodium hydrogen phosphate, and examples of the trimetallic phosphate include tripotassium phosphate and trisodium phosphate. Be

  As a nonionic surfactant to be provided for the treatment agent of the present invention, 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 the number of oxypropylene units, and so on.

  The treatment agent of the present invention contains 20 to 88.99 mass% of the above long chain alkyl phosphate ester salt, 1 to 10 mass% of short chain alkyl phosphate ester salt, and 0.01 to 10 mass of inorganic phosphate. % And nonionic surfactant in a ratio of 10 to 65% by mass (total 100% by mass). The content ratio of the inorganic phosphate is more preferably 0.1 to 5.0% by mass, and still more preferably 0.3 to 3.0% by mass.

  The treatment agent of the present invention may further contain one selected from the following waxes and the following linear polyorganosiloxane in a proportion of less than 12% by mass of the entire 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: one having a kinematic viscosity of 1 × 10 ^{−3 to} 100 × 10 ⁻³ m ² / s at 30 ° C.

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

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

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

  Examples of polyester-based synthetic fibers include polyethylene terephthalate fibers and polytrimethylene terephthalate fibers. Among them, polyethylene terephthalate fibers are preferable. There is no particular limitation on the rate at which the treatment agent of the present invention is attached to the fiber, but it is preferable to attach the treatment agent of the present invention to the fiber in a proportion of 0.01 to 0.5% by mass. The step of depositing the treatment agent of the present invention may be any of a spinning step, a stretching step, a crimping step and the like, but it is preferred to be deposited before or after the spinning step or crimping step. The adhesion method may be any of an immersion oiling method, a spray oiling method, a roller oiling method, a guide oiling method using a measuring pump, etc., but an immersion oiling method, a spray oiling method or a roller oiling method is preferable.

  According to the present invention, a polyester-based synthetic fiber treating agent and polyester capable of suppressing the generated electricity in the spinning process while combining the excellent convergence of the tow in the spinning process and the excellent stretchability in the drawing process. The excellent effect of providing a synthetic fiber is exhibited.

The whole view which briefly displays the test apparatus used for evaluation of the processing agent of this invention in a longitudinal cross-section in part.

  Hereinafter, examples and the like will be described in order to make the configuration and effects of the present invention more specifically, but the present invention is not limited to these examples. In the following examples and comparative examples, "part" means "mass part" and "%" means mass%.

Test division 1 (Preparation of polyester-based synthetic fiber treatment agent and measurement of surface tension)
Example 1
69.0 parts of octadecyl phosphoric acid ester potassium salt (A-1), 5.0 parts of butyl phosphoric acid ester potassium salt (A-4), 1.0 part of dipotassium hydrogen phosphate (B-1) 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 mixture (C-1) of / 25/50 (mass ratio) was completely dissolved in a predetermined amount of half amount of ion exchange water heated to 80 ° C. with stirring. After dissolution, the remaining half amount of ion-exchanged water was added at a stretch and stirred until uniform, to prepare 200 g of a 1% aqueous solution of a synthetic fiber treatment agent. It was 9.0 when pH of this aqueous solution was measured. A 1% aqueous solution of the prepared synthetic fiber treatment agent is subjected to a vertical plate method surface tension measurement device (trade name KYOWA CBVP SURFACE TENSION METER manufactured by Kyowa Interface Science Co., Ltd.) to measure the surface tension at 20 ° C. 5 The average value (mN / m) of the five measured values determined in this manner was calculated to be 39.7 mN / m.

-Examples 2-15, the reference example 1, and the comparative examples 1-13
In the same manner as in Example 1, 200 g of a 1% aqueous solution of each of the synthetic fiber treating agents of Examples 2 to 15, Reference Example 1 and Comparative Examples 1 to 13 was prepared with the contents described in Table 1 and surface tension It measured and calculated the average value. Table 1 summarizes the contents of each example and the surface tension, including Example 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 ester 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-hydroxypolyoxyethylen A mixture of (n = 10) / α-dodecylamino-ω-hydroxypolyoxyethylene (n = 10) = 70/30 (mass ratio) 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 10 ° C. of 10 × 10 ^{− 3} m ² / s linear polydimethylsiloxane

Test category 2 (Evaluation of processing agent for polyester synthetic fiber)
With respect to the polyester-based synthetic fiber treatment agent of each example prepared in Test Category 1, the tow bundling ability, stretchability and generated electricity were evaluated as follows, and the results are summarized in Table 2.

Evaluation of tow focusing property The tow focusing property was evaluated as follows by substituting the dynamic surface tension of the polyester-based synthetic fiber treatment agent. A 1% aqueous solution of the treating agent for polyester synthetic fiber prepared in Test Category 1 is allowed to stand overnight at 20 ° C., and then a dynamic surface tension measuring device (trade name QC6000 manufactured by Chem-Dyne Research Corporation) The dynamic surface tension was measured at 25 ° C. and an atmosphere of 65% RH under the condition of 5 Bubbles / second, and the toe focusing was evaluated based on the following criteria.

Evaluation criteria for tow focusing ◎: Dynamic surface tension less than 40 mN / m ○: Dynamic surface tension greater than 40 mN / m and less than 45 mN / m ×: Dynamic surface tension greater than 45 mN / m

Evaluation of Stretchability The stretchability was evaluated as follows using the test apparatus schematically shown in FIG. In FIG. 1, 1 is a container, 2 is a 1% aqueous solution of a polyester-based synthetic fiber treating agent, 3 is a cylindrical metal friction body, 3 and 5 are free rollers, and 6 is a polyester filament. With respect to a 1% aqueous solution of the synthetic fiber treating agent, 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. The tension T1 and T2 in the downstream part of the above were measured in an atmosphere at 20 ° C., and the stretchability was evaluated based on the following criteria from the ratio of T2 / T1.

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 The 1% aqueous solution of the treatment agent for polyester-based synthetic fiber prepared in Test Category 1 is further diluted with deionized water, and the 0.5% aqueous solution of the treatment agent for polyester-based synthetic fiber is prepared. Prepared. A semi-dal polyester staple of 38 mm in fiber length, with a fineness of 1.3 × 10 ^-4 g / m (1.2 denier), obtained in the cotton-making process with a 0.5% aqueous solution of the prepared treatment agent for polyester synthetic fiber After making it adhere to a fiber by a spray oiling method so that the adhesion amount as a processing agent for polyester based synthetic fiber is 0.15%, and drying with a hot air dryer at 80 ° C. for 2 hours, 25 ° C. × 40% RH The humidity was controlled overnight under an atmosphere to obtain a treated polyester staple fiber to which a treating agent for polyester synthetic fiber was attached. Using 10 kg of the treated polyester staple fiber thus obtained, it was subjected to a flat card (manufactured by Toyowa Kogyo Co., Ltd.) under an atmosphere of 25 ° C. × 40% RH and passed at a spinning speed of 140 m / min. . The generated electricity of the spun card web was measured, and the antistatic property was evaluated based on the following criteria.

Evaluation criteria of 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 × ×: generated electricity is 0.6 kV or more

  As apparent from the results of Table 2 corresponding to Table 1, according to the present invention, the combination of the excellent focusing of the tow in the spinning step and the excellent stretchability in the drawing step are further combined, and further in the spinning step. There is an excellent effect that the generated electricity can be sufficiently suppressed.

Reference Signs List 1 container 2 1% aqueous solution of polyester-based synthetic fiber treatment solution 3 cylindrical metal friction body 4, 5 free roller 6 polyester filament

Claims (6)

20 to 88.99% 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 A treating agent for synthetic fibers based on polyester, comprising 10 to 65% by mass (total 100% by mass) of an ionic surfactant.
Long chain alkyl phosphoric acid ester salt: Alkali metal salt of alkyl phosphoric acid ester having 16 to 18 carbon atoms in alkyl group.
Short-chain alkyl phosphate ester salt: Alkali metal salt of alkyl phosphate ester having 4 to 8 carbon atoms in alkyl group.
Inorganic phosphate: at least one selected from bimetallic hydrogen phosphate and trimetallic phosphoric acid. The polyester-based synthetic fiber treating agent according to claim 1, further comprising a wax selected from the following waxes and the following linear polyorganosiloxane in a proportion of less than 12% by mass of the whole.
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: one having a kinematic viscosity of 1 × 10 ^{−3 to} 100 × 10 ⁻³ m ² / s at 30 ° C.   The processing agent for a polyester-based synthetic fiber according to claim 1 or 2, wherein the content ratio of the inorganic phosphate is 0.1 to 5.0% by mass.   The content rate of the said inorganic phosphate is 0.3-3.0 mass%, The processing agent for polyester-type synthetic fibers as described in any one of Claims 1-3.   The polyester-based synthetic fiber treating agent according to any one of claims 1 to 4, wherein the surface tension at 20 ° C of the 1% by mass aqueous solution is less than 45 mN / m.   A polyester-based synthetic fiber to which the polyester-based synthetic fiber treatment agent according to any one of claims 1 to 5 is attached.

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