阅读说明：本技术 聚酯系合成纤维用处理剂和聚酯系合成纤维 (Treating agent for polyester synthetic fiber and polyester synthetic fiber ) 是由 小室利广 二宫彰纪 木村裕 福冈拓也 北原秀章 于 2018-06-15 设计创作，主要内容包括：本发明提供聚酯系合成纤维用处理剂和附着有该聚酯系合成纤维用处理剂的聚酯系合成纤维,该处理剂可提高纺丝工序中的丝束的集束性、并且可提高拉伸工序中的拉伸性,进而能够充分抑制纺织工序中的电气产生。作为聚酯系合成纤维用处理剂,使用以20～88.99质量％的比例含有特定的长链烷基磷酸酯盐、以1～10质量％的比例含有特定的短链烷基磷酸酯盐、以0.01～10质量％的比例含有特定的无机磷酸盐、以及以10～65质量％的比例(合计比例100质量％)含有非离子表面活性剂而成的处理剂。(The invention provides a treating agent for polyester synthetic fiber and polyester synthetic fiber attached with the treating agent, the treating agent can improve the bundling property of filament bundle in the spinning process, and can improve the stretching property in the stretching process, and further can fully inhibit the electricity generation in the spinning process. The treating agent for polyester synthetic fibers contains 20 to 88.99 mass% of a specific long-chain alkyl phosphate salt, 1 to 10 mass% of a specific short-chain alkyl phosphate salt, 0.01 to 10 mass% of a specific inorganic phosphate salt, and 10 to 65 mass% (total ratio 100 mass%) of a nonionic surfactant.)

1. A treating agent for polyester synthetic fibers, characterized by comprising 20 to 88.99 mass% of a long-chain alkyl phosphate salt, 1 to 10 mass% of a short-chain alkyl phosphate salt, 0.01 to 10 mass% of an inorganic phosphate salt, and 10 to 65 mass% of a nonionic surfactant, wherein the sum of the proportions is 100 mass%,

long-chain alkyl phosphate salts: an alkali metal salt of an alkyl phosphate having an alkyl group with 16 to 18 carbon atoms;

short-chain alkyl phosphate salts: an alkali metal salt of an alkyl phosphate having an alkyl group of 4 to 8 carbon atoms;

inorganic phosphate salt: at least one selected from the group consisting of a dibasic metal phosphate and a trimetallic phosphate.

2. The treating agent for polyester synthetic fibers according to claim 1, further comprising a wax selected from the group consisting of the following waxes and the following linear polyorganosiloxanes in an amount of less than 12% by mass based on the whole,

wax: at least one substance selected from an ester compound obtained from an aliphatic monohydric alcohol having 16-22 carbon atoms and an aliphatic monocarboxylic acid having 6-22 carbon atoms and paraffin wax, and having a melting point of 50-120 ℃,

linear polyorganosiloxane having a kinematic viscosity of 1 × 10 at 30 DEG C^-3m²/s～100×10^-3m²Substance/s.

3. The treatment agent for polyester synthetic fibers according to claim 1 or 2, wherein the content of the inorganic phosphate is 0.1 to 5.0% by mass.

4. The treatment agent for polyester synthetic fibers according to any one of claims 1 to 3, wherein the content of the inorganic phosphate is 0.3 to 3.0% by mass.

5. The treatment agent for polyester synthetic fibers according to any one of claims 1 to 4, wherein a 1% by mass aqueous solution of the treatment agent has a surface tension of less than 45mN/m at 20 ℃.

6. A polyester synthetic fiber characterized by having the treating agent for polyester synthetic fiber according to any one of claims 1 to 5 attached thereto.

Technical Field

The present invention relates to a treating agent for polyester synthetic fibers and polyester synthetic fibers to which the treating agent for polyester synthetic fibers is attached.

Background

Conventionally, as a polyester-based synthetic fiber treating agent, a treating agent containing an alkali metal salt of an organic phosphate ester, a specific wax or linear polyorganosiloxane, and a specific nonionic surfactant (patent document 1), a treating agent containing an alkali metal salt of an organic phosphate ester, a specific wax, a specific linear polyorganosiloxane, and a specific nonionic surfactant (patent document 2), a treating agent containing an alkali metal salt of an alkyl phosphate ester, a specific nonionic surfactant, and a metal phosphate salt (patent document 3), and the like have been proposed.

Further, a fiber treatment agent containing a specific potassium salt of an alkyl phosphate ester, and at least one selected from the group consisting of a polyoxyalkylene alkyl ether, a polyoxyalkylene alkenyl ether, and a polyoxyalkylene (alkylphenyl) ether (patent document 4), and a fiber treatment agent containing a specific potassium salt of an alkyl phosphate ester and an acrylic resin at a specific ratio (patent document 5) are disclosed. Further, an oil for treating synthetic fibers, which contains an alkali metal salt of a phosphoric acid as an important component, is disclosed (patent document 6).

Disclosure of Invention

Problems to be solved by the invention

As exemplified in the above patent documents, various fiber-treating agents have been proposed. However, there is a strong demand in the market for a polyester synthetic fiber and a treating agent thereof, which have excellent tow bundling property in a spinning step, excellent stretchability in a stretching step, and further can suppress the generation of electricity in a spinning step, as a high-performance treating agent.

The present invention has been made in view of the above-mentioned background, and an object thereof is to provide a treating agent for polyester synthetic fibers, which has both excellent tow bundling property in a spinning step and excellent stretchability in a drawing step and can suppress the generation of electricity in a spinning step, and a polyester synthetic fiber to which the treating agent for polyester synthetic fibers is attached.

Means for solving the problems

The present inventors have made extensive studies and, as a result, have found that the object of the present invention can be achieved by using a treating agent for polyester synthetic fibers comprising 3 specific components and a nonionic surfactant at a specific ratio, and have completed the present invention.

Specifically, the present invention relates to a treatment agent for polyester synthetic fibers, which is characterized by containing 20 to 88.99 mass% of a long-chain alkyl phosphate salt, 1 to 10 mass% of a short-chain alkyl phosphate salt, 0.01 to 10 mass% of an inorganic phosphate salt, and 10 to 65 mass% of a nonionic surfactant, wherein the total of the above proportions is 100 mass%, and a polyester synthetic fiber to which the treatment agent for polyester synthetic fibers is attached.

Long-chain alkyl phosphate salts: an alkali metal salt of an alkyl phosphate having an alkyl group of 16 to 18 carbon atoms.

Short-chain alkyl phosphate salts: an alkali metal salt of an alkyl phosphate having an alkyl group of 4 to 8 carbon atoms.

Inorganic phosphate salt: at least one selected from the group consisting of a dibasic metal phosphate and a trimetallic phosphate.

First, the polyester-based fiber treatment agent of 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 synthetic fibers, which contains 3 specific components and a nonionic surfactant at a specific ratio.

Examples of the long-chain alkyl phosphate salt to be used in the treatment agent of the present invention include alkali metal salts of alkyl phosphates having 16 to 18 carbon atoms in the alkyl group, such as alkali metal hexadecyl phosphate, alkali metal octadecyl phosphate, and alkali metal isostearyl phosphate.

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

The inorganic phosphate to be used in the treatment agent of the present invention is at least one selected from the group consisting of a di-metal hydrogen phosphate salt and a tri-metal phosphate salt, with the di-metal hydrogen phosphate salt being preferred. Specifically, examples of the dibasic metal phosphate include a dibasic potassium phosphate and a dibasic sodium phosphate, and examples of the tribasic metal phosphate include a tribasic potassium phosphate and a tribasic sodium phosphate.

Examples of the nonionic surfactant to be 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), and α -dodecylamino- ω -hydroxypolyoxyethylene (n ═ 10). Here, n represents the number of ethylene oxide units, and n + m represents the total number of ethylene oxide units and propylene oxide units, and the same applies hereinafter.

The treatment agent of the present invention comprises 20 to 88.99 mass% of the long-chain alkyl phosphate, 1 to 10 mass% of the short-chain alkyl phosphate, 0.01 to 10 mass% of an inorganic phosphate, and 10 to 65 mass% of a nonionic surfactant, wherein the total of the above proportions is 100 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 a substance selected from the following waxes and the following linear polyorganosiloxanes in a proportion of less than 12% by mass of the entire treatment agent of the present invention.

Wax: at least one substance selected from an ester compound obtained from an aliphatic monohydric alcohol having 16-22 carbon atoms and an aliphatic monocarboxylic acid having 6-22 carbon atoms and paraffin wax, and having a melting point of 50-120 ℃.

Linear polyorganosiloxane having a kinematic viscosity of 1 × 10 at 30 DEG C^-3～100×10^-3m²Substance/s.

Specifically, examples of the wax include ester compounds obtained from an aliphatic monohydric alcohol having 16 to 22 carbon atoms such as cetyl alcohol, stearyl alcohol, arachidyl alcohol and behenyl alcohol, and an aliphatic monocarboxylic acid having 6 to 22 carbon atoms such as caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid and behenic acid, and paraffin wax having a melting point of 65 ℃^-3m²Polydimethylsiloxane, kinematic viscosity at 30 ℃ of 50 × 10^-3m²Polydimethylsiloxane,/s, and the like.

The surface tension of a 1 mass% aqueous solution of the treating agent of the present invention is preferably less than 45 mN/m. The surface tension can be determined by supplying a 1 mass% aqueous solution of the treating agent of the present invention prepared using ion-exchanged water to a vertical plate surface tension measuring apparatus.

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

Examples of the polyester synthetic fibers include polyethylene terephthalate fibers and polytrimethylene terephthalate fibers, and among them, polyethylene terephthalate fibers are preferable. The ratio of the treatment agent of the present invention to be attached to the fiber is not particularly limited, but the treatment agent of the present invention is preferably attached in a ratio of 0.01 to 0.5 mass% with respect to the fiber. The step of adhering the treating agent of the present invention may be any of a spinning step, a drawing step, a crimping step, and the like, and it is preferable to adhere the treating agent before or after the spinning step or the crimping step. The adhesion method may be any of a dip oil feeding method, a spray oil feeding method, a roll oil feeding method, an oil guide feeding method using a metering pump, and the like, and a dip oil feeding method, a spray oil feeding method, or a roll oil feeding method is preferable.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, an excellent effect is exhibited that a treating agent for a polyester synthetic fiber and a polyester synthetic fiber can be provided, which can achieve both excellent tow bundling property in a spinning step and excellent stretchability in a stretching step, and can suppress electrical generation in a spinning step.

Drawings

FIG. 1 is a schematic overall view of a test apparatus used for evaluating a treatment agent of the present invention, shown in a partial longitudinal section.

Detailed Description